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Journal of Jilin University(Engineering and Technology Edition)
ISSN 1671-5497
CN 22-1341/T
主　任：陈永杰
编　辑：张祥合　曹　敏 　程仲基
　　　　赵莹莹　赵浩宇
电　话：0431-85095297
E-mail：xbgxb@jlu.edu.cn
地　址：长春市吉林大学南岭校区
　　　　逸夫教育大楼B823室
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01 July 2008, Volume 38 Issue 04
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Test and simulation on hydro-pneumatic torsion eliminating suspension
GUO Kong-hui，LU Dang，SONG Jie，SUN Sheng-li，WU Hai-dong
吉林大学学报(工学版). 2008, 38 (04):  753-757.  DOI:
Abstract ( 2378 )   PDF (578KB) ( 588 )  
A mechanical and hydraulic model of the hydropneumatic torsion eliminating suspension was established in ADAMS. The torsion eliminating conditions were simulated and compared with the test data to validate the established model of hydropneumatic torsion eliminating suspension system. The performance of the vehicle with the hydropneumatic torsion eliminating suspension was predicted by the established vehicle model. It was proved that the torsion eliminating suspension is good for eliminating the vehicle body twist load, decreasing the unbalance of the tire vertical loads and ensuring the good contact between tire and road without negative effects on the vehicle handling stabilily.
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Adaptive threshold algorithm based on contrast-regional homogeneity
analysis of lane image
GUAN Xin, JIA Xin, GAO Zhen-hai
吉林大学学报(工学版). 2008, 38 (04):  758-763.  DOI:
Abstract ( 2639 )   PDF (710KB) ( 574 )  
Aiming at the problem that the road lane line image detection is liable to be interfered by the complicated environmental conditions such as the lighting condition and the lane line curvature, leading to the poor stability of the detection algorithm, images recorded during driving on the various typical road conditions, such as the straight road, the curved road, the lightly snowy road and the shadowed road were analyzed for their contrast and regional homogeneity on the basis of the Otsu image threshold segmentation method. The Otsu adaptive lane image threshold segmentation was implemented based on the classical Otsu segmentation algorithm, improving the robustness of the road lane line image detection under the complicated environmental conditions.
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Parameter matching and optimization of on-board synergic electric power supply system of hybrid electric vehicle
YU Yuan-bin, WANG Qing-nian, WANG Jia-xue, ZHAO Xiao-xu
吉林大学学报(工学版). 2008, 38 (04):  764-768.  DOI:
Abstract ( 2334 )   PDF (723KB) ( 607 )  
A rational layout of the synergic electric power supply system on board of the hybrid electri vehicle(HEV) was proposed based on the analysis of the effects of the loading of the supercapacitor on the parameters of its power components. The parameter matching was done to meet the demand for the energy and power of the HEV, and the parameters were optimized for the minimization of the lifecycle cost as the objective. The matched results were analyzed by the simulation, strongly suggesting that including the supercapacitor in the HEV does make sense from the perspectives of the mass, the volume, the lifecycle cost, and the efficiency of recovering the braking energy, they are better than those of the HEV with a single electric battery power supply system.
Key words：vehicle engineering; hybrid electric vehicle(HEV); supercapacitor; synergic electric power supply system; lifecycle cost
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Regulation of PID controller parameters based on ant colony optimization
algorithm in vehicle traction control system
LI Jing，LIU Xue，ZHAO Jian
吉林大学学报(工学版). 2008, 38 (04):  769-772.  DOI:
Abstract ( 1792 )   PDF (452KB) ( 438 )  
The ant colony algorithm was used to design PID controller of traction control system, whose parameters could be adjusted automatically. A software-in-the-loop simulator and a hardware-in-the-loop test bench were erected, the controller parameters were debugged and calibrated, and the algorithm based on lookup table was obtained to meet realtime requirement. The hardware-in-the-loop tests on typical roads were made and the test results show that the control algorithm can improve the vehicle accelerating performance on the low adhesion road effectively.
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Influence of vehicle front structure on frontal airbag undeployment
speed threshold in frontal rigid wall impact
TANG Hong-bin, WANG Deng-feng
吉林大学学报(工学版). 2008, 38 (04):  773-777.  DOI:
Abstract ( 1588 )   PDF (495KB) ( 533 )  
The vehicle frontal structures(the bumper, the crash box, the front member of the longitudinal beam, etc.) which are seriously deforming during the first 20~30 ms in the frontal full rigid wall impact was studied,then the simplified CAE simulation model was built and verified,and the effects of compressible space and material strengths used in the front structure on airbag undeployment speed threshold were analyzed by the built model. The results show that airbag undeployment speed rises with the increase of compressible space and material strengths, and frontal airbag deployment speed set by CAE model accurately can reduce deployment probability significantly at low speed of the airbag due to the unappropriate set of its undeployment threshold.
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Optimization design for water jacket of 498 diesel engine
LIU Tie-gang, LI Jun, GAO Ying
吉林大学学报(工学版). 2008, 38 (04):  778-781.  DOI:
Abstract ( 2698 )   PDF (461KB) ( 499 )  
Facing the overheating occurs during the actual operation of the 498 type diesel engine, the computational fluid dynamics(CFD) analysis was made for the cooling water jacket. It was found that the stagnant zones appear in the intake side of the cylinds block water jacket, and the water flow distribution is uneven. To improve the cooling capacity of the jacket, the outlet position of the oil cooler and the position and size of the water holes through the cylinder head gasket were optimized through CFD simulation. In the optimized water jacket the stagnant zones are basically eliminated and the cooling capacity of the water jacket is improved obviously with good effect in the real application.
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Effect of spark ignition on homogeneous charge compression
ignition combustion stability of ethanol
GU Yan-hua,GUO Ying-nan, LIU Fa-fa, PENG Ya-ping, LIANG Xiao-ming
吉林大学学报(工学版). 2008, 38 (04):  782-785.  DOI:
Abstract ( 1966 )   PDF (376KB) ( 477 )  
The control of the ignition and combustion phases is one of the main difficulties in the homogeneous charge compression ignition(HCCI) combustion. The HCCI combustion of ethanol was realized in a test engine modified from a series produced single-cylinder diesel engine and the effect of the spark ignition(SI) on the HCCI combustion stability was investigated. The results show that the combustion rate and the thermal efficiency in the HCCI combustion are higher than those in the SI combustion, being accompnied by a remarkable reduction of the NOx emissions and the cyclic variation of combustion. At the critical temperature operation conditions, introduction of the SI improves the HCCI combustion stability and reduces the misfire rate. As the temperature rises above the critical, the effect of the SI on the HCCI combustion decreases.
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On-board diagnostic function calibration of 3way catalyst
WANG Yong-jun，WANG Zhong-shu, HAN Yong-qiang，LIU Zhong-chang，REN Li-rong
吉林大学学报(工学版). 2008, 38 (04):  786-790.  DOI:
Abstract ( 2748 )   PDF (469KB) ( 729 )  
Based on traditional OBD diagnostic methods utilizing oxygen storage capability of 3-way catalyst, and development one new numerical algorithm for OBD diagnosis of catalyst to the requirements of national standard GB 18352.3-2005. And we used this numerical arithmetic for OBD system calibration of Jetta vehicle, test results expressed that the diagnosis results of 3way catalyst meets the requirements of national standard, and has no influence for emission.
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Effects of fuel cetane number on emissions from a turbocharged and
intercooled diesel engine under transient operating conditions
SUN Wan-chen, WANG Zong-shu，LI Guo-liang，LIU Zhong-chang，XIE Fang-xi, YANG Ji-rui
吉林大学学报(工学版). 2008, 38 (04):  791-796.  DOI:
Abstract ( 2543 )   PDF (573KB) ( 417 )  
The effect of fuel cetane number on the emission behavior from turbocharged and intercooled diesel engine were investigated under steady and transient operating conditions with a selfmade special transient operation control and exhaust measurement system. The high cetane number fuel can improve HC and NOx emissions. Under 1800 r/min, low load operating conditions, when the fuel cetane number increases from 40 to 66, HC decreases by 62%. To improve the CO and opacity smoke emissions, the fuel cetane number exists an optimum. The emission behavior from diesel engine under constant speed increasing torque transient operating conditions are different with that under steady operating conditions, and with the increase of engine torque changing rate HC, CO and opacity smoke emissions all rise. The high cetane number fuel can improve CO, HC and opacity smoke emissions under middlespeed operating conditions. Under the high speed increasing torque operating conditions, the two fuel cetane numbers 66 and 55 have no difference on opacity smoke emission.
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Representation and storage method for road network of traffic guidance system
JIANG Gui-yan,ZHENG Zu-duo,YU Yan-xia
吉林大学学报(工学版). 2008, 38 (04):  797-801.  DOI:
Abstract ( 2293 )   PDF (392KB) ( 461 )  
Considering the particularity of the road network and the demand of the shortest path algorithm for the road network information, a new method of representation and storage of the road network to enhance the real-timeness of the shortest path algorithm was proposed based on the basic idea of the dual graph representation to improve the forward star structure. The method was tested against the classic shortest path algorithms such as Dijktra and A*. The results show that the method can clearly express the connectivity of the road network, eliminate its node weights, reduce the time complication degree and the search space, enhance the search efficiency of the shortest path algorithm due to the introduction of two pointerarrags which make the node locating fast and accurate.
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Stop spacing optimization model based on minimizing
average travel time of passenger
YANG Xiao-guang, XU Jing-qi, LIU Hao-de, FU Jing-yan
吉林大学学报(工学版). 2008, 38 (04):  802-807.  DOI:
Abstract ( 2343 )   PDF (752KB) ( 570 )  
A stop spacing optimization model for the objective of minimizing the average travel time of the passengers was proposed based on the analysis of the transit trip process and the probability distribution of the trip distance. The basic relationship between the average trip time of the passengers and the optimal stop spacing was derived by means of a trialanderror search algorithm. The relationship between the main parameters of the model and the optimal stop spacing and its sensitivity were discussed using the practical data. The effectiveness of the model was validated.
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Modification of stop-wave model of urban expressway
YANG Shao-hui，MA Lin，WANG Dian-hai，CHEN Sha
吉林大学学报(工学版). 2008, 38 (04):  808-811.  DOI:
Abstract ( 2080 )   PDF (304KB) ( 465 )  
The analysis of the stopwave data from the urban expressways in Beijing city indicated that the calculation results from the traditional stopwave model disagreed with the practical observed data, could not decrible precisely the stop process of a vehicle platoon because of that the traditional stopwave model was built based on the Greenshields speeddensity model. In view of that the platoon stop process occurs at high density, the Greenberg speeddensity model was used instead of the Greenshields model. The modified model was validated using the field data and the calculated stopwave velocity is very close to the practice.
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Damage identification of bridge structure based on statistical properties of eigen-solution
CHENG Yong-chun，TAN Guo-jin，LIU Han-bing，FU Cong
吉林大学学报(工学版). 2008, 38 (04):  812-816.  DOI:
Abstract ( 1863 )   PDF (421KB) ( 415 )  
A method to identify the damage of the bridge structure using the sensitivity matrix of the modal parameters with respect to the physical parameters of the structure on the basis of the matrix pertubation theory in the vibration analysis. This method is convenient in formation of the sensitivity matrix of the structure because of no need of the partial derivative calculations. To evaluate the stability of the proposed method, the statistical properties of the physical parameters of the bridge structure were analyzed under the model parameters with random errors. The validity, the practicability and the stability of the method were demonstrated by a simply supported reinforced concrete bridge as an example.
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Anti-seismic test on concretefilled square steel tube column
LI Li-ming1,2, LI Ning3, CHEN Zhi-hua4, JIANG Xin-liang4
吉林大学学报(工学版). 2008, 38 (04):  817-822.  DOI:
Abstract ( 1845 )   PDF (718KB) ( 538 )  
To study the antiseismic performance of the concrete-filled square steel tube columns(CFSSTCs), a quasistatic test under the low-frequency cyclic load was designed and carried out. The bearing capacity, the deformability, the rigidity decay, the energy dissipation ability and the failure pattern of the CFFSSTCs under the lateral seismic load were investigated. The displacement ductility of the CFSSTC specimens were analyzed, the effects of the steel ratio, the slenderness ratio, and the axial compression ratio on the ductility of the CFSSTCs were studied. The results show that the most remarkable factor is the slenderness ratio, the axial compression ratio takes second place and the steel ratio is third.The test data provide a reference for the antiseismic design of the CFSSTCs.
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Cross-section ductility of confined highstrength concrete Zshaped column
JIAO Jun-ting1,2, DIAO Bo2, YE Ying-hua2
吉林大学学报(工学版). 2008, 38 (04):  823-828.  DOI:
Abstract ( 1729 )   PDF (769KB) ( 373 )  
The cross-section ductility indexes of the confined high-strength concrete Zshaped column were calculated and analyzed under different loading conditions by means of the developed numerical analysis program for the confined highstrength concrete Z-shaped columns.The parameters affecting the cross-section ductility, such as the loading angle, the axial compression ratio, the concrete strength, the longitudinal reinforcement ratio, the hoop reinforcement ratio, and the cross-section size, etc., were investigated. The results show that the main parameters（in descending order）include the loading angle, the axial compression ratio, the concrete strength, and the hoop reinforcement ratio. The regressions were made between the crosssection ductility and the main parameters and calculation expressions were derived, providing a reference for the calculation of the ductility of the confined highstrength concrete Zshaped column cross-sections.
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Load capacity and stiffness of beamcolumn joint strengthened by plate rings with irregularly arranged double level beams
WU Jian-ying1,2, CAI Jian1,2, HE Jun1, CHEN Qing-jun1,2
吉林大学学报(工学版). 2008, 38 (04):  829-834.  DOI:
Abstract ( 1949 )   PDF (615KB) ( 497 )  
The beam-column joint strengthened by plate rings is the most mature and widely used steel joint. In the paper the experiments on the full-scale specimens of typical joints strengthened by plate rings with irregular arranged double level beams were conducted to investigate the mechanical performances and failure mechanisms. The specimens were also numerically simulated by the finite element analysis(FEA) program, and good agreement between the simulated results and the test data demonstrated the validity of the established FEA model. The parametric analysis was also carried out using the FEA model. Finally, the calculation formulas for the load capacity and the stiffness of the beamcolumn joint strengthened by plate rings with irregularly arranged double level beams were proposed for reference in the practical designs.
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Microstructure and friction and wear properties of Mg-Y4-Nd3 alloy
YANG Xiao-hong1, ZHANG Kui2,ZHANG Mei-juan1，LUO Ke-shuai1,LIU Yong-bing1
吉林大学学报(工学版). 2008, 38 (04):  835-839.  DOI:
Abstract ( 1557 )   PDF (1024KB) ( 362 )  
Microstructure, tensile properties and tribological properties of as cast and T6 treated Mg-Y4-Nd3 alloy (solution treatment for 8 h at 525 ℃ and aging treatment for 16 h at 250 ℃) were investigated. The results show that the eutectic phase in Mg-Y4-Nd3 alloy was distributed at the grain boundary of αMg solid solution in the form of discontinuous network. After solution and aging treatment, the microstructure of the alloy exhibited equiaxed grains and most of the eutectic phase dissolved into the α-Mg matrix. The precipitate phases dispersed uniformly after aging process. The tensile strength of the two alloys with different treatments decreased as the temperature was increased whereas the elongation increased. At the same temperature the alloy after T6 treatment shows higher tensile strength than the as cast alloy. As the applied load was increased, the friction coefficient of the T6 alloy decreased but the wear rate increased under the dry sliding condition. Moreover, the wear mechanism changed from abrasive wear and oxidation wear to delamination wear; at high load the worn surface shows plastic deformation and extrusion phenomenon.
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Effect of rare earth element Y content in Al target on CrAlTiN film
LIU Zhao-zheng1，LIU Yao-hui1，JIANG Bai-ling2，YU Si-rong1
吉林大学学报(工学版). 2008, 38 (04):  840-843.  DOI:
Abstract ( 1522 )   PDF (365KB) ( 389 )  
The effect of the content of the rare earth element Y in the aluminium target on the CrAlTiN film was studied. The samples of CrAlTiN film were analyzed by means of the scanning electron microscope, energy dispersive spectrdmeter, Xray photoelectron spectroscope, and micro-hardness meter. The results indicate that adding the rare earth element Y into the aluminium target material could not only raise the film thickness, but also change the surface phases, following the increase of the Y content, the film surface phase changes from CrN,Cr2N to Cr, and the Al content also increases. The hardness of the CrAlTiN film reduces with the increase of the Y content, approaching 1500 HV.
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Preparation of bone repair material of modified-MWNTs/nano-HA/PLA
ZHANG Xiao-ming, WANG Hong-yan, LI Jun-feng
吉林大学学报(工学版). 2008, 38 (04):  844-847.  DOI:
Abstract ( 1600 )   PDF (398KB) ( 433 )  
Pure multi-wall carbon nanotubes with carboxyl (MWNTs—COOH) were prepared by means of purification by gas-phase and liquid-phase oxidation processes. MWNTs—COO/nano-HA composites were in situ synthesized by coating the MWNTs—COOH with nano-HA with the help of ultrasonic, and MWNTs—COO/nanoHA/PLA composites, which could be used as bone repair materials, were produced by melt blending method. The properties of composites were characterized by FT-IR, XRD, TEM, and tensile test. Results show that the MWNTs—COOH are completely coated by nanoHA, and the MWNTs—COO/nanoHA particles are in nanograde. The effects of the contents of MWNTs—COOH and MWNTs—COO/nano-HA on the mechanical properties of the composites were also studied, and the optimal contents of MWNTs—COOH and MWNTs—COO/nano-HA in the complex materials matrix were determined.
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Reconfigurable CNC system based on ARM and DSP
XU Yue, WANG Tai-yong, ZHAO Yan-ju, DONG Jing-chuan, LI Bo
吉林大学学报(工学版). 2008, 38 (04):  848-851.  DOI:
Abstract ( 2085 )   PDF (346KB) ( 392 )  
A hardware development platform for the computer numerical control(CNC) system was built based on the ARM and the DSP. It is characterized by the high integrity and robust stability, meets the requirements of the production process on high speed and high precision. The reconstruction time gap problem in the dynamic reconstruction of the FPGA was solved by using the SRAM and the reconstructable design based on the FPGA was realized to enhance the flexibility of the system. The introduction of the embedded realtime operation system RT-Linux and the layered software design enhances the operation stability of the CNC system and the realtimeness of the task dispatching. The practical application of the developed CNC system in the CNC machine tool proved the feasibility of the system.
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Simulation modeling with Drum-Buffer-Rope for remanufacturing system
SUN Bao-feng1，TIAN Xiao-chuan1，XIAO Wei2，MA Li-li1
吉林大学学报(工学版). 2008, 38 (04):  852-857.  DOI:
Abstract ( 1997 )   PDF (625KB) ( 417 )  
Drum-Buffer-Rope scheduling method (DBR) and simulation tool ARENA were used to simulate the production process in a case of end-of-life home appliance's remanufacturing system. The simulation model of DBR was established and the dynamic checking for the remanufacturing production process was implemented. It was explained in detail how to make use of the DBR model founded to identify and eliminate the resource constraints, and therefore improved the recourse utilization rate and benefits of remanufacturing system. Outcomes from experimental simulations show that the DBR model enables to come true identifying and eliminating recourse constraints and their influences. By offering the optimal value of Buffer Size of DBR model, the phenomenon of queue delaying in the unit of constraint is eliminated and the supply uncertainty of remanufacturing system goes lower, meanwhile the objective functions as Recourse Utilization rate and Net Profit are also optimized.
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Immune PSO-based dynamic recurrent neural network for identifying and controlling nonlinear systems
GE Hong-wei1，LI Xiao-lin2，LIANG Yan-chun3，HE Xiang-dong4
吉林大学学报(工学版). 2008, 38 (04):  858-864.  DOI:
Abstract ( 2259 )   PDF (744KB) ( 632 )  
A learning algorithm for dynamic recurrent Elman neural networks was presented, which is based on an immune particle swarm optimization (PSO). The algorithm computed concurrently the evolution of network structure, weight, initial inputs of the context units and the self-feedback coefficient of the modified Elman network. Thereafter, a novel control method based on the proposed algorithm was introduced and discussed. More specifically, a dynamic identifier was constructed to perform speed identification, and a controller was designed to perform speed control for Ultrasonic Motors (USM). Numerical experiments show that the identifier and the controller based on the proposed algorithm can both achieve higher convergence precision and convergence rate than those based on other state-of-the-art algorithms. In particular, the experiments show that the identifier can approximate the USM's nonlinear inputoutput mapping accurately. The effectiveness of the controller is verified using constant speed, step and sinusoidal changing speeds.
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ZHAO Wen-hong1, WANG Wei1,2, WANG Yu-ping2, HAO Ming-qiang3
ZHAO Wen-hong1, WANG Wei1,2, WANG Yu-ping2, HAO Ming-qiang3
吉林大学学报(工学版). 2008, 38 (04):  865-870.  DOI:
Abstract ( 2043 )   PDF (699KB) ( 433 )  
In order to make the evolutionary algorithms escape from local minima in solving global optimization problems, a smooth function was introduced. This function can eliminate all such local optimal which are worse than the optimal solutions found so far. Taking the properties of the smooth function into consideration, a crossover operator was designed which can find the descent direction of the real function by using the relationship between the smooth function and the population. A mutation operator was constructed to increase the diversity of the population. Finally, an evolutionary algorithm for global optimization problems was proposed. The global convergence of the proposed algorithm is theoretically verified and its effectiveness is demonstrated by numerical simulations for all test functions.
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Multi-solutions problem in geometric constraint
YI Rong-qing, LI Wen-hui, YUAN Hua, WANG Duo, GUO Wu
吉林大学学报(工学版). 2008, 38 (04):  871-875.  DOI:
Abstract ( 2036 )   PDF (447KB) ( 420 )  
To solve the constraint multi-solution problem, the constraints are separated to two sets, the original constraint set and the additional constraint set. First, the solver finds out multiple solutions. Then genetic algorithm and ant algorithm are combined in the process of searching optimal solution. We adopt genetic algorithm in the former process to produce the initiatory distribution of information elements, and then ant algorithm in the latter process. The random colony is adopted in genetic algorithm, which can not only accelerate the convergence process of ant algorithm but also avoid the local best solution. The heuristic searching algorithm maximizes the fitness of the additional constraint set, thereby reaches the final result that can satisfy the user's expectation.
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Efficient interval-genetic algorithm for multipeak global optimization
ZHANG Xiao-wei1，LIU San-yang1，CHI Xiao-ni2
吉林大学学报(工学版). 2008, 38 (04):  876-879.  DOI:
Abstract ( 2062 )   PDF (482KB) ( 552 )  
To overcome the disadvantage of high computation cost in traditional interval optimization algorithms for high dimensional problems, an interval-genetic algorithm was proposed. This algorithm combines the interval algorithm and a genetic algorithm. It employed the interval algorithm to bound the search domains of the genetic algorithm, and adopted a reject index to make the intervals containing the global optimum being more easily selected. Moreover, the algorithm used an upper bound of the global optimum provided by the genetic algorithm to discard the intervals not containing the global optimal solution. Simulation results on some multipeak global optimizations show that the efficiency of the proposed algorithm is higher than traditional interval optimization algorithms and this advantage becomes more significant in solving high dimensional optimizations.
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Novel dynamic power management of sensor node in wireless sensor networks
WANG Yi, ZHANG De-yun, MA Xin-xin, LIANG Tao-tao
吉林大学学报(工学版). 2008, 38 (04):  880-885.  DOI:
Abstract ( 2071 )   PDF (716KB) ( 519 )  
A novel dynamic power management (DPM) algorithm is proposed for the sensor node of wireless sensor networks (WSNs), in which the sleeping threshold of each node in sleeping status is deduced theoretically and the probability of event arrival is investigated using Possion distribution on the basis of the event arrival processing model. Furthermore, on the premise of no effect on performance of WSNs, the Mduplicatecovered concept is introduced to abstract the cover redundancy in WSNs, and the characteristics of each sleep state of sensor node are analyzed. Based on these researches, the conditions of entering or escaping a state and the time interval of keeping the state are analyzed. Finally, we propose three asynchronous awakening schemes so that each node is free to power on or off its components based on the statistics. The simulation results show that the DPM algorithm can dynamically regulate the sleep depth of nodes while satisfying the network performances, reduce about 28% of the energy consumption and about 37% switching latency of DPM, and increase about 52% of the success ratio of switching, thereby the sensor node's lifetime as well as the WSNs' lifetime is effectively improved.
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Publicity verifiable fair electronic auction protocol
YANG Jia-xi1, LI Lei1,2，ZHU Hui1, WANG Yu-min1
吉林大学学报(工学版). 2008, 38 (04):  886-889.  DOI:
Abstract ( 2150 )   PDF (488KB) ( 490 )  
A fair and efficient secure electronic auction scheme is presented, which is simple and can be publicly verified. The scheme adopts more symmetric encryption/decryption instead of public key cryptosystem, overcomes the drawback that the third party conspires with a malicious bidder so that he can win the auction with an optimal bidding price, and then provides fairness. The scheme preserves losing bids and bidders's anonymous identities. No bidder can repudiate his or her bid and all the bidding prices can be publicly verified. Compared with the recently proposed schemes, the proposed scheme is more efficient and easily to be implemented.
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Real-time signals transmission based on polynomial predictive filtering theory
DONG Jin-nan1, QIN Gui-he1,2, ZHANG Jin-dong1, CUI Yue1
吉林大学学报(工学版). 2008, 38 (04):  890-896.  DOI:
Abstract ( 2462 )   PDF (695KB) ( 403 )  
The realtime signal transmission was studied by using signal processing theory. A prediction method to alleviate the bad consequences caused by the transmission uncertainty was presented. Between users and network a virtual sensor, whose output signals seem to be generated from a local sensor, was constructed by combining polynomial predictive filtering (PPT) theory and channel coding technique. Thus, the network transmission uncertainty was transformed into the system model uncertainty. Based on this, the error caused by the transmission uncertainties and the prediction error were processed together as the output error of virtual sensor, by which the realtime performance and the reliability of the signal transmission were balanced. In such a way, a system related with real-time signal transmission can be designed and analyzed as the nonnetworked system. The presented method is of great theoretical importance and application significance for the development of networked control system (NCS) and sensor network.
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Extended difference function and its application in image motion estimation
LI Li, Qu Zhen-shen, ZENG Qing-shuang
吉林大学学报(工学版). 2008, 38 (04):  897-901.  DOI:
Abstract ( 2294 )   PDF (695KB) ( 499 )  
Since difference function (DF) based motion estimation methods with translational motion model without magnitude changing limits performance in image estimation with varying illumination, a novel method of translation estimation on the basis of extended difference function in Radon domain was developed after the analysis of difference function, the definition of extended difference function (EDF), and proof of linear relation between zeros and translation vector, which is irrelevant to illumination. Experiments were conducted on this method for different set of image with illumination changes. The results demonstrate that this method is invariance to illumination changes with robustness against noise at low computation cost.
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Motion segmentation based on graph theory
HOU Ye,GUO Bao-long
吉林大学学报(工学版). 2008, 38 (04):  902-906.  DOI:
Abstract ( 2091 )   PDF (445KB) ( 482 )  
Two algorithms, graph cut and random walk based on graph theory, were applied to motion segmentation. The graph cut algorithm was employed to segment the motion objects automatically by constructing network graph, eliminating shadows by HSV color space, building adaptive background mixture models and segmenting the image through minimum cut. The random walk was applied to carry out motion object segmentation interactively by selecting seeds, building weights, solving Dirichlet problem and morphology filtering. The application of the two algorithms was investigated by several experiments. Results show that for a single object, a clean and smooth segmentation can be quickly achieved by the graph cut. While for video objects with low contrast and weak boundary the random walk performs well, a good result can be generated if there is no realtime request. This provides good foundation for subsequent tracking and segmentation operations.
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Eye corner tracking based on Hough transform and unscented Kalman filter
LI Yun-han, ZHU Shan-an
吉林大学学报(工学版). 2008, 38 (04):  907-912.  DOI:
Abstract ( 2096 )   PDF (544KB) ( 470 )  
Eye features include iris, eyelids, eye corners etc. The tracking of eye features plays an important role in face recognition system as the eye features are among the most salient facial features. A robust algorithm for tracking the eye outer corners in video sequence was presented. This algorithm is based on modified Hough Transform (HT) and Unscented Kalman Filter (UKF). The proposed algorithm uses the modified HT to extract the eye outer corners when the iris is available in the input images. Otherwise the algorithm uses the UKF to estimate the positions of the eye outer corners. Experiments demonstrate the accuracy of the proposed algorithm.
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Improvement on Canny operator by algorithm of self-adaptive determining doublethreshold
LI Mu, YAN Ji-hong, ZHU Yan-he, ZHAO Jie
吉林大学学报(工学版). 2008, 38 (04):  913-918.  DOI:
Abstract ( 2480 )   PDF (870KB) ( 482 )  
Traditional Canny-operator has a satisfied chanracter in edge detection. But if gradient image is processed with module non-maximum suppression, doublethresholds should be evaluated to detect edges when Canny algorithm is adopted. For different images, the thresholds should not be identical. Currently the double-thresholds are normally obtained through personal experience, which restricts the use of Canny operator in practice. To solve this problem, an algorithm which can adaptively determine the double thresholds based on gradient histogram and minimum interclass variance and improve Canny operator was proposed. Theory and experiments show that the proposed algorithm is effective and correct.
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Lossless hyper-spectral image compression algorithm based on mixing transform of SHIRCT, subtraction and CDF(2, 2) DWT
XIE Cheng-jun, LIU Tai-hui
吉林大学学报(工学版). 2008, 38 (04):  919-923.  DOI:
Abstract ( 2225 )   PDF (397KB) ( 467 )  
Integer reversible color transform (SHIRCT) and subtraction mixing transform to eliminate spectral redundancy was presented, meanwhile 2D-CDF(2, 2)DWT was used to eliminate spatial redundancy. This transform can be fully implemented by add and shift operations, therefore it is convenient for hardware realization. Its redundancy elimination effect is better than that of (1D+2D)CDF(2, 2)DWT. An improved EBCOT algorithm was applied for compression coding. Experiments show that in lossless image compression application the effect of the proposed method is slightly better than the effect acquired using (1D+2D)CDF(2, 2)DWT and improved EBCOT algorithm. It is much better than JPEGLS, WinZip, ARJ, DPCM, NMST and MST, and the method in the literature\[1\]
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Variable structure control of flexible manipulator based on distributed parameter model
Variable structure control of flexible manipulator based on distributed parameter model
吉林大学学报(工学版). 2008, 38 (04):  924-929.  DOI:
Abstract ( 1894 )   PDF (589KB) ( 408 )  
A sliding mode variable structure control method was proposed based on distributed parameter model of flexible manipulator, and the stabilization problem of the controlled system with uncertain parameter and disturbance was resolved. The variable structure controller was designed by use of Lyapunov function method, and sliding surface was chosen as a linear combination of joint angle, joint angle velocity and root strain of flexible manipulator. An asymptotical stability of the closed loop system was proved by using linear operator semigroup and LaSalle invariance principle. Simulation results were presented to validate the proposed controller performance.
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Multi-attribute decision making on the path of rocker rover based on converted motion control
DENG Zong-quan，HOU Xu-yan，GAO Hai-bo，HU Ming
吉林大学学报(工学版). 2008, 38 (04):  930-935.  DOI:
Abstract ( 1488 )   PDF (596KB) ( 421 )  
Based on concered motion control of six-wheeled rocker rover, in order to ensure safe, rapid and low in energy consumption paths, a multi-attribute decision making was taken for some chosen paths. According to konematics analysis on the basis of the velocity projection theorem and quasistatic model, the objective torsion and rotate speed were calculated. Rocker pitch angles of the rover in random terrain were also calculated according to the character of passively shape shifting adaptive suspension. Therefore the ralationship beween path figures and objective driving parameters was built. Then the attributes of the paths the are energy consumption, time consumption, path terrain feature and lenth were calculated and the optimal path was selected by using TOPSIS multiattribute decision making method. Simulation results indicate that this optimal path is efficient, rapid and safty and can avoid parochialism in single attribute decision making system.
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Micro-hotplate temperature measurement system based on radiation power
QI Qi1,2，ZHANG Tong1,2，LIU Li1,2,3，LIU Kui-xue1,2，XU Bao-kun1,2
吉林大学学报(工学版). 2008, 38 (04):  936-939.  DOI:
Abstract ( 1895 )   PDF (497KB) ( 444 )  
An uncontacted temperature measurement system was developed to deal with the problem of the tiny chip surface temperature measurement. The radiation power from the microhotplate was measured by a tiny optical fiber probe and an optical power meter. The Sichip with the similar surface physical character as the microhotplate was chosen to calibrate the radiation power against the temperature. By comparing the measured radiation power with the calibration curve, the temperature of the micro-hotplate surface in the area of 50 μm×50 μm can be discerned accurately. The proposed method has a better accuracy than the traditional ones. The measured results are in good agreement with those of the simulation by the FEA software ANSYS,and using the optical fiber probe with different apertures can meet the measurement requirement of the samples with different areas.
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Finite element analysis and experiment on travelling-wave ultrasonic motor
with two-sided cone-shaped teeth and self-supported shafting
LI Xia1,2, CHEN Wei-shan1, XIE Tao1
吉林大学学报(工学版). 2008, 38 (04):  940-945.  DOI:
Abstract ( 1348 )   PDF (763KB) ( 446 )  
The conventional onesided travelling-wave ultrasonic motor(TWUSM) needs bearing to support and oil to lubricate, does provide sufficiently high torque and power due to limited contact area between the stator and the rotor, consequently its application is limited. So, a TWUST with the two-sided coneshaped teeth and self-supported shafting was developed. Its structure was designed and its excitation mechanism was analyzed. The model, harmonic, and transient analyses of the motor stator were performed using the FEA software ANSYS. The excitation frequency was predicted precisely, the shapes of the vibration modes, the vibration amplitude and impedance versus frequency behaviors and displacement versus time curve of the tooth tip on the stator and its elliptical locus were obtained theoretically. The developed motor prototype was tested and its load characteristics were measured. The maximum stall torque of 0.48 N·m is reached which is 1.7 times as high as the conventional onesided TWUSM, and its idle speed is 86 r/min.
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Image retrieval based on variable k-nearest neighbor locally linear embedding data dimension reduction algorithm
LI Yong，CHEN He-xin，ZHAO Gang，SUN Zhong-hua，CHEN Mian-shu
吉林大学学报(工学版). 2008, 38 (04):  946-949.  DOI:
Abstract ( 2097 )   PDF (571KB) ( 504 )  
In content based image retrieval, computation complexity will increase seriously as the demension of the image feature increases. When reducing the vector dimension with locally linear embedding algorithm, the number k of nearest neighbors should be determined. In this paper we propose a variable k neighbors LLE (VKLLE) method based on the distribution of the image feature. The VKLLE method can reduce the vectors dimension with keeping their original topology structure into a lower dimension space. Experiment shows that the proposed VKLLE method can achieve higher precision rate in content based image retrieval problem.
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Orthognal local projective method for weak signal extraction in chaos
HE Li-qiao1, WANG Guo-guang2, WANG Dan2
吉林大学学报(工学版). 2008, 38 (04):  950-954.  DOI:
Abstract ( 2233 )   PDF (597KB) ( 468 )  
An orthogonal local projective algorithm was derived by improving local projective method on noise reduction in chaotic time series. According to the deterministic character of chaos, a predictive approach of neighborhood selection was presented and rules of parameter selection was proposed,which can extract weak signal in Henon chaos at SNR=-80 dB. Simulation results verified that the method has higher stability and reliability and is effective in weak signal extraction in chaos.
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Fast dynamic channel allocation scheme based on TD-SCDMA system
SHI Wen-xiao, ZHAO Ye-zhen, ZHAO Song, ZHAO Jun
吉林大学学报(工学版). 2008, 38 (04):  955-959.  DOI:
Abstract ( 2047 )   PDF (516KB) ( 417 )  
According to the frame characterristic of TD-SCDMA system, an improved boundary strategy dynamic channel allocation (MB DCA) scheme applicable for the system was proposed, which is a mixed data rate and small grouping borrowed MB DCA scheme. This scheme can solve the problem of low channel borrowed efficiency in the case of mixed data rate, make MB strategy more flexible, and improve system capability through small grouping borrowed. Simulation results show that the proposed scheme can update data service capability and increase channel utilization efficiency without affecting voice service performance.
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Chaos steganography algorithm for video sequence based on H.264
WANG Bo, FENG Jiu-chao
吉林大学学报(工学版). 2008, 38 (04):  960-965.  DOI:
Abstract ( 2096 )   PDF (517KB) ( 374 )  
On the basis of the recently proposed video coding standard H.264, a chaos steganography algorithm with chaos encryption and chaos steganography was presented. Performance analysis of the proposed algorithm was given by using standard video sequences. Simulation results indicate that this steganography algorithm can be fast and effectively implemented, and visual effect and peak signal to noise ratio (PSNR) of the video sequences are almost not affected after decoding.
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SAR image compression based on multiwavelet transform
WANG Ai-li, ZHANG Ye, GU Yan-feng, CHEN Yu-shi
吉林大学学报(工学版). 2008, 38 (04):  966-969.  DOI:
Abstract ( 2230 )   PDF (486KB) ( 388 )  
In the real domain, the finitely supported, orthogonal, symmetric nontrivial scalar wavelet bases do not exist, while the multiwavelet offers the finite support, symmetry, orthogonality simultaneously. As a result, the wavelet theory is extended to vector field. A technique for compressing synthetic aperture radar (SAR) image data using multiwavelet transform and prefilter methods is considered. The experiment results show that we can get comparative or superior performance after replacing the wavelet by multiwavelet using modified set partitioning in hierarchical trees (SPIHT) algorithm designed for wavelet. So combining with the characteristic of multiwavelet coefficients and designing corresponding coding method, multiwavelet transform is of great potential for SAR image compression application.
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Power allocation scheme for multiple spotbeam satellite communication
systems with coexisting unicast and multicast flows
LIU Gong-liang1，2, GU Xue-mai1, KANG Wen-jing2，3, GUO Qing1
吉林大学学报(工学版). 2008, 38 (04):  970-975.  DOI:
Abstract ( 2093 )   PDF (658KB) ( 506 )  
A multi-objective optimization power allocation scheme was proposed for multiple spotbeam satellite communication system supporting both unicast and multicast flows. In consideration of coherence of each multicast flow in different beams, fairness of different flows sharing uplink bandwidth and average transmission rate of all flows, a mathematical model with three objective functions was constructed, and a nondominated sorting genetic algorithm II (NSGAII) was adopted to solve optimal power set. Simulation results show that this scheme achieves high fairness and multicast coherence, and largely improves average session rate in comparison with the existing schemes. Moreover, the scheme has high convergence speed and satisfies the situation that network traffic is dynamically changed.
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Error analysis of pico-satellite attitude angle measurement based on sun vector
YU Fa-Xin1,2, SUN Lin-lin2
吉林大学学报(工学版). 2008, 38 (04):  976-980.  DOI:
Abstract ( 2408 )   PDF (462KB) ( 502 )  
The error of pico-satellite attitude angle measurement consists of sun vector measurement error and sun vector calculation error, which are analyzed and calculated respectively. The picosatellite is characterized by small volume, light weight and low power consumption. Based on these characteristics, a designed micro sun sensor is used to measure the sun vector which is then compared with the sun vector calculated from the orbit propagator. In such a way the picosatellite attitude angle can be obtained. It is determined that the sun vector measurement error is about 5.74° which is caused by many factors, such as the non-ideal cosine curve between incident angle and photocurrent, the photocurrent noise, the nonlinearity of the analog circuit and the A/D converter, and the temperature inaccuracy etc. The limited resource of picosatellite constrains itself to adopt simple Kepler orbit propagator only to calculate the sun vector and its error which is about 0.1°. Thus the total attitude angle error is about 5.84°.
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Attitude control for interceptor missile by combine control based on neural networks
YIN Yong-xin， YANG Ming， WANG Zi-cai
吉林大学学报(工学版). 2008, 38 (04):  981-985.  DOI:
Abstract ( 1963 )   PDF (444KB) ( 378 )  
In order to effectively adjust attitude motion of interceptor missile by combine control, an attitude control method was presented. A mathematical model of interceptor missile was constituted based on moment of momentum theorem. And with a view to mathematical model and fire logic of thrusters, a neural network controller of attitude motion system was designed for interceptor missile: acquiring basal controller based on simple method, and adjusting control parameters of simple controller using neural network. A desired pitch control moment and yaw control moment were obtained using optimal principle for interceptor missile. Simulation results show that this attitude control method can implement efficiently precise attitude control of interceptor missile as well as preferable dynamic performance.
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Mid-range relative navigation method for noncooperative target satellite
LI Li-tao, YANG Xu, LI Shun-li
吉林大学学报(工学版). 2008, 38 (04):  986-990.  DOI:
Abstract ( 1793 )   PDF (529KB) ( 375 )  
Based on the measurement method of using Visual Navigation Camera and Laser Ranger Finder, with combination of the measurement information of attitude sensor and inertial measurement unit, a navigation algorithm using an extended Kalman filter was proposed to estimate relative position and velocity of Free Flying Robot with respect to non-cooperative target. Under near coplanar orbit and mid-range distance assumption, a simplified navigation algorithm that can reduce complexity and computational effort of the proposed navigation algorithm was given. Even with unknown target orbital parameter, the relative motion parameter can also be estimated. Simulation results verify the validity of this navigation method and show a higher navigation accuracy.
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Three dimensional path planning of UAV with improved ant algorithm
CHEN Mou, XIAO Jian, JIANG Chang-sheng
吉林大学学报(工学版). 2008, 38 (04):  991-995.  DOI:
Abstract ( 2387 )   PDF (516KB) ( 684 )  
In order to ensure unmanned automatic vehicle (UAV) to reach the destination with minimum probability of being found in an acceptable path, a three dimensional path planning method was studied on the basis of an improved ant algorithm. First the model of three dimensioanl path planning of UAV was analyzed. Then an optimization of path planning with ant algorithm for UAV was given. To improve the efficiency of path planning, the message of the shortest path was introduced in the system as a searching guidance signal, and a modified nodes selection method was also given. For the validation of the effectiveness of the proposed method, it was used in the path planning of UAV and simulation results show that it can obtain optimum path.
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Algorithm evaluation for lunar rover path-planning
YIN Li-ming1, JIA Yang2
吉林大学学报(工学版). 2008, 38 (04):  996-1000.  DOI:
Abstract ( 1600 )   PDF (634KB) ( 502 )  
In this paper the performance of the algorithm for lunar rover pathplanning is evaluated, and a quantified evaluating function for the performance of the pathplanning algorithm was proposed. The feasibility of the evaluating function was verified by experiments. Two commonly used global planning algorithms and two local planning algorithms were taken into consideration, and the search algorithm which is more adaptive for lunar exploration was identified by theoretical analysis using the evaluating function and by experiments. It is demonstrated that the proposed quantified evaluating function for the performance of path planning algorithm is not only feasible but also universal, which could be adaptable in evaluating other path planning algorithms.
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