To reduce the experimental condition restrictions and the cost of the high speed tire tests, the ability of predicting the high speed tire force and moment characteristics from the low speed tire tests was studied by means of the UniTire model using TNO lateral tire test data under different speeds, including the effects of the speed on the dynamic frictional coefficient, on the lateral and longitudinal stiffness, and on the pneumatic trail. It is proved by the test that UniTire model is characterized by high precision in predicting the high speed performances from the low speed tire tests.

Facing the disadvantages of the traditional instruments in the field of the vehicle performance test, the virtual instrument technology was introduced， and a vehicle performance testing system based on the virtual instruments was developed. By employing the PCDAQ scheme and multisensor collection and data fusion equipped with a PC machine and the virtual instrument software, a control and measure system were built which can examine the performance of auto exhaust emission, noise, headlight, braking system, suspension system, chassis power, steering system and sideslip, etc. The system was proved to be reliable and accurate through testing cars in practice.

On the basis of the theories of gap acceptance and probability, the theoretical passing capacity of the advance rightturn vehicles under two planning approaches was investigated. A mathematic model for using interweaving area to enhance the passing capacity of the advance rightturn vehicles was proposed. By this model, the running efficiency of the two planning approaches was compared where the average delays were taken as the assessment index. In a junction where motor vehicles were allowed rightturn in advance, the first approach was applied if it meets the demand of rightturn motor vehicle capacity; otherwise prolonging the interweaving area to increase the passing capacity was adopted to reduce the average delay of the rightturn vehicles. Prolonging the interweaving area is an applicable approach to solve practical problem although it enlarges the conflict zone.

he effect of the spark energy on the emissions was investigated on a small LPG SI engine (125 mL, 4stroke, watercooled, singlecylinder, with electronically controlled fuel injection). A microcomputercontrolled DCCDI igniter was designed, and the exhaust emissions from the engine under different mixture concentrations were studied by changing the adjustable ignition energy. The results show that the ignition energy has little effect on the emissions while the mixture is rich, but much effect while the mixture is lean. Increasing ignition energy can expand the limit of misfire and widen the leanburn range of LPG engine.

To disclose the failure mechanism of reflow conducting roll (RCR), its surface morphology was observed, the composition of the adhered materials on RCR surface was analyzed, and the surface roughness decreasing process of RCR was tracked and analyzed. Results show that adhered tin is the main reason for the RCR failure, and wear quickens it. The wear and adhered tin masses were given out for the first time, and finally the measures decreasing the adhered tin and improving the wear resistance of RCR were put forward.

A new type of acrylate copolymer polyester nanoemulsion was synthesized by molecular selfassembled polymerization without using emulsifier, and its structure and properties were characterized by TEM, DSC and FTIR. On the basis of the synthesized polymer nanoemulsion, a kind of waterborne block type nanostructural paint for exterior wall was prepared and it is characterized by waterresistant good, physicomechanical properties and decorative and protective performance. Result shows that the scrub resistance of the prepared paint is significant, exceeding 10 000 times.

The freezing adhesive characteristics of 6 kinds of engineering materials such as Q235, PTFE, aluminum alloy, rubber, smooth glass and frosted glass were tested by using the selfdesigned measuring instrument of freezing adhesive force. The concept of freezing adhesive coefficient of materials was defined and the freezing adhesive coefficients of abovementioned materials were obtained from the freezing adhesive tests. The interface damage morphology between material and ice was observed, the damage behavior of interfacial ice layer was analyzed under different freezing adhesive strengths. Freezing adhesive interface model composed of adhesive ice layer and iceadhered layer was established, and assumed that the material freezing adhesive strength is determined by the strength of the adhesive ice layer itself. The mechanism of generating freezing adhesive strength was analyzed, providing a new approach to the research of antifreezing adhesive theory and techniques.

Abstract：To reduce the manipulation complexity of the hydraulic excavator in finishing work, a 2degreesoffreedom dynamic analysis for the working mechanism of a hydraulic exeavator was performed, and its dynamic equation was established. A method for compensating the dead band of the control valves, the set of the PID control parameters and their selection were accomplished by experiments. A simulation of the excavator bucket control scheme was done under selected parameters. The simulated results show that the bucket tracking error was controlled within 120 mm when the horizontal linear tracking distance of the bucket end was set at 2500 mm and the horizontal tracking speed at 107 mm/s, achieving the precision of an average vetran operator, so the control scheme is applicable.

To improve the detaching plug seedling rate and the dropping plug seedling accuracy of current plugseedling transplanters, a detaching and dropping plug seedlings mechanism with straight movement and double stopping pin was developed based on the shape of plug seedlings. The main operating parameters of such mechanism were determined by analyzing the force conditions and kinematic characteristics during the transplating process. The experiments showed that the mechanism not only improves the transplanting rate of the plug seedlings with shape of truncated cone greatly (more than 3 seedlings per second), but also is very adaptive to broken plug seedlings.

A fault diagnosis approach for the rolling bearing based on the KL transform(KLT) and support vector machine(SVM) was proposed. The KLT can transform a multidimensional correlated variable into a less dimensional independent eigenvector, and SVM enables the pattern recognition and nonlinear regression. Based on these concepts, the KLT was employed to extract the state eigenvector from the bearing vibration signals, then the SVM classifier was established to recognize the fault pattern. Experimental results showed that the combination of the eigenvector decomposed by the KLT with the SVM is able to recognize the fault patterns of the rolling bearing effectively and accurately, providing a new approach to the development of fault diagnosis intelligentization.

The bill of material(BOM) was put forward to solve the information integration(II) between the computer aided design(CAD) system and the product data management(PDM) system in the collaborative product design(CPD) from the view of the product lifecycle management. The features of the information flow integration between the 2and 3dimensional CAD system and the PDM system were discussed. The II between the design BOM of the CAD system and the engineering BOM of the PDM system was studied. The feasibility of the II between the CAD system and the PDM system in the CPD based on the BOM was illustrated by an example.

Using an improved adaptive genetic algorithm, an evolutionary Elman neural network model with dynamic regression was built. A learning algorithm which can simultaneously evolve the network structure, the weights, the initial inputs of structural unit, and the selffeedback gain coefficient was proposed. Ultrasonic motor speed identification was performed by the dynamic recurrent network algorithm which was formed by the integration between initial state optimized Elman network with feedback learning algorithm and Elman network online training algorithm. Simulated results show that the proposed algorithms not only realize fully automatic optimization design for the dynamic recurrent neural network, but also improve convergent accuracy for the model identification. And this method can provide a new approach to nonlinear dynamic system identification.

To track expectation locus accurately as the load and link length of twolink flexible manipulator varies, the control system was decomposed into two subsystems, slowlychanging subsystem and fastchanging subsystem based on the singular perturbation model. A hybrid control method, consisting of adaptive sliding mode control which was applied to slowlychanging subsystem and optimal control which was applied to fastchanging subsystem, was presented. The adaptive algorithm can estimate unknown parameters online, and fuzzy control can damp the vibration caused by sliding mode control. Simulation result shows that the proposed method not only can accurately and fast track the flexible manipulator locus, but also can effectively damp the elastic vibration, and is strongly robust to the variation of system parameters. The characteristic of the proposed method is that each equivalent vibration parameters can be adaptively estimated and compensated respectively, so it is simple and easy to implement.

Facing the problem of multiple constraint Quality of Service Routing（QoSR）, a novel selection algorithm based on K shortest paths, QRBKP, was proposed. This algorithm calculated the K shortest paths first according to each constraint parameter. Then the QoSR satisfying multiple constraints was selected among all shortest paths with the value of k changing adaptively to the QoS constraints. Both intranodepair reassignment method and internodepair reassignment method were proposed to assure the routing table space not out of the range of designed routing table space. Theoretical analysis shows QRBKP can solve QoSR not only with additive constraint parameters, but also with nonadditive constraint parameters. Simulation results show that the routing computational success ratio of QRBKP is higher than that of current algorithms in solving QoSR under the same computational time.

UML state machine model of software was transformed into the input language of model checker MOCHA and was checked in it. The model checker gave counterexamples path according to the flaw found in the model checked, which could modify the software UML design model. The verified UML model was transformed into abstract specifications of B method, in which it can be refined, verified and translated into source C code. The rules of transformation from UML state machine to REACTIVE MODULES modelling language and B AMN abstract specifications were put forward. The experimental result shows that the strategy could significantly improves the efficiency of development and verification of highconfidence embedded software.

On the basis of analysing current methods of ridge distance estimation and not using conventional ideas to estimate ridge distance at a whole or block image, a new method at region level to estimate ridge distance of fingerprint images was put forward. A whole fingerprint image was adaptively partitioned into several regions according to the consistency of ridge directions. Based on binary valued fingerprint image, statistical window and base line of each region were defined. By using distance statistical method at the region unit, average ridge distance was estimated. Experimental results show that this method can reduce the effect of reference minutiae and poor quality image on ridge distance estimation, and the ridge distance estimation results are reliable and invariable to the resolution of image acquisition system.

The cubic Bspline smoothing filter operator to perform multiscale filtering was designed using the characteristics of wavelet transform. The obtained multiscale wavelet transform was combined with adaptive thresholds to extract image edge at different scales. Through using multiscale characteristic of the edge information and synthesizing the multiscale edge, the image edge with only one pixel wide was obtained. Computer simultion results show that this method is superior to the traditional edge detection methods with both precise image edge detection and effective noise restraining.

The influence of KrF excimer UV laser irradiation on the structural and optical properties of Gedoped flame hydrolysis deposited silica glass films was investigated. A maximum refractive index increase of about 3.41×10^-3was obtained at approximately 1550 nm wavelength after 10 min irradiation. The irradiation process and surface morphology of the films were analyzed by atomic force microscopy (AFM). Results show that with the increase of the irradiation time the density of the film increases while surface roughness decreases， and the refractive index increases.

By analyzing the LFM signal in colored noise， a crossspectral ESPRIT method based on quadratic form transformation was proposed. The method converts the nonstationary LFM signal into a stationary signal, then modern crossspectral estimation theory was employed by the ESPRIT method to accomplish the following signal processing achieving high efficiency and high precision estimation. The SNR of the additive colored noise can drop to -5 dB. The validity and effectiveness of the proposed method are verified by simulation results.

An orbital modulation method by controlling the corresponding transient orbit errors of mean orbit control targets was proposed. On the basis of analytical orbit theory, the state transition matrix from mean to transient orbit errors was put forward. A proper control strategy controlling the transient orbit element errors to realize the modulation of mean orbit element errors was given. Simulation results show that the mean orbit element errors can be modulated to meet the given error range within one period by the method proposed in this paper， and it is brief in computational formula and suitable for autonomous calculation and laying the theoretical foundation for the modulation of autonomous orbit in the satellite. Key words：

The coupled bendingtorsional galloping oscillation caused by the beam wind in the tall building 3-dimensional structure was studied, its mathematical equation was derived by the infinitesimal element method and its decoupling and analysis were performed. The aerodynamic forces causing the structure oscillation were analysed for the different angles included between the airflow and the building structure. The stability conditions against the bendingtorsional coupled galloping oscillation in the tall building 3-dimensional structure consolidated on the bedrock or ground were proposed. A simple expression for calculating the critical wind speed to excite the galloping oscillation of the structure was formulated, and exemplified by calculations. The calculation results showed that the proposed expression is reasonable and convenient for the engineering application.