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Journal of Jilin University Science Edition
ISSN 1671-5489
CN 22-1340/O
主 任:韩啸
编 辑:赵立芹 王健 单凝 李琦
电 话:0431-88499428
E-mail:sejuj@jlu.edu.cn
地 址:长春市南湖大路5372号
    (130012)
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Table of Content
26 November 2014, Volume 52 Issue 06
Jordan Multihomomorphisms on Associative Rings
LI Lingyue, XU Xiaowei
Journal of Jilin University Science Edition. 2014, 52 (06):  1105-1111. 
Abstract ( 243 )   PDF (333KB) ( 328 )  

We introduced the notions of Jordan multihomomorphisms, multihomomorphisms and Boolean homomorphism. Using Boolean homomorphisms, we described the structures of Jordan multihomomorphisms on associative rings with identity, and then showed that a Jordan multihomomorphism is a multi-homomorphism on associative rings with identity, and finally, gave general forms of Boolean homomorphisms on some special rings.

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Co-annihilator Operator of BL-Algebras and Its Image of BL-Homomorphism
WANG Xiaxia, WU Hongbo
Journal of Jilin University Science Edition. 2014, 52 (06):  1112-1118. 
Abstract ( 325 )   PDF (361KB) ( 266 )  

Firstly, the definition of singlepoint coannihilator operator was given in the BLalgebras, then some properties of singlepoint co-annihilator operator were studied. Secondly, some properties of multiplepoint co-annihilator operator were discussed, and the necessary and sufficient conditions were given for a subset being an image of multiplepoint co-annihilator operator in the BLalgebras. Finally, some properties of multiplepoint co-annihilator operator’s image of BLhomomorphism were discussed, and the necessary and sufficient conditions were given when coannihilator operator’s image of BL-homomorphism and its inverse image of BL-homomorphism are the images of multiple point co-annihilator operator.

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Solution Configuration of Semiring Valuation Algebra
XU Geni, LI Yongming, ZHANG Yun
Journal of Jilin University Science Edition. 2014, 52 (06):  1119-1124. 
Abstract ( 219 )   PDF (361KB) ( 199 )  

The properties of the solution configuration of valuation algebra over a totally ordered semiring were discussed. Furthermore, the concept of preserving the solution  configuration of valuation algebra over a totally ordered semiring was given. With the help of the properties of the solution configuration, the question of the transfer function f preserving solution  configuration was studied. It is concluded that the transfer function f preserves solution configuration if f is a semiring homomorphism.

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Oscillation Analysis of Nonlinear DelayParabolic Systems with Impulse Effect
LUO Liping, ZENG Yunhui, LUO Zhenguo
Journal of Jilin University Science Edition. 2014, 52 (06):  1125-1130. 
Abstract ( 187 )   PDF (330KB) ( 156 )  

Using a new technique of treating nonlinear diffusion term and impulsive delay differential inequalities, the authors studied the oscillation problems for a class of delay parabolic systems with impulse effect and nonlinear diffusion term under first boundary condition and some new sufficient conditions are established for the oscillation of all solutions of such systems. The results obtained fully indicate that the system oscillation is caused by the effect of impulse and delay.

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Spectrality of Selfaffine Measures with a Collinear Digit Set on R3
GAO Guibao
Journal of Jilin University Science Edition. 2014, 52 (06):  1125-1130. 
Abstract ( 121 )   PDF (305KB) ( 168 )  

Using the feature of zeropoint sets Z(μ^M,D), where μ^M,D is the Fourier transform of selfaffine measures μM,D, we discussed the spectrality and nonspectrality of the collinear digit set. We gave a method to deal with the spectrality and nonspectrality of self\|affine measures with collinear case on R3.

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Existence of Positive Solution for OneDimensional Singularp-Laplacian ThreePoint Boundary Value Problems
BAI Jie, ZU Li
Journal of Jilin University Science Edition. 2014, 52 (06):  1136-1144. 
Abstract ( 232 )   PDF (362KB) ( 236 )  
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Existence of Multiple Positive Solutions for a Class ofthe Boundary Value Problems of Fractional OrderNonlinear Differential Equation on the Half Line
ZHANG Haibin, JIA Mei, CHEN Qiang
Journal of Jilin University Science Edition. 2014, 52 (06):  1145-1150. 
Abstract ( 253 )   PDF (317KB) ( 233 )  

We studied a class of the boundary value problems for fractional order nonlinear differential equation with Caputo derivative on the half line. Based on the Schauder fixed point theorem and the LeggettWilliams fixed point theorem, the existence theorems of at least one positive solution and at least three positive solutions have been established, respectively for this class of the boundary value problems.

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Existence and Uniqueness of Solutions for Stochastic CahnHilliard Equations Driven by α-Stable Noise
JIA Xiuli, GUAN Lihong, YAN Long
Journal of Jilin University Science Edition. 2014, 52 (06):  1151-1154. 
Abstract ( 217 )   PDF (298KB) ( 198 )  

Applying contracting mapping, we studied a class of stochastic CahnHilliard equations driven by α-stable noise, and obtained the existence and uniqueness of solutions for the equations.

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Analysis and Control of Hopf Bifurcation forRegenerative Chatter System
LI Pengsong, SHENG Guiquan, MENG Yongyong
Journal of Jilin University Science Edition. 2014, 52 (06):  1155-1161. 
Abstract ( 277 )   PDF (1311KB) ( 236 )  

We considered a class of retarded onedegreeoffreedom nonlinear system, namely, the regenerative model of chatter in a lathe machine tool. The time delay influence on the stability of the system solutions was analyzed with the aid of multiple scales. Nonlinear displacement feedback control can be used to suppress the selfsustained oscillation caused by Hopf bifurcation. The results of the theory analysis and numerical simulation show that the designed controller is valid for the cutting chatter system.

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Verified Methods of Singular Solutions of Overdetermined Nonlinear Systems
SANG Haifeng, WAN Baocheng
Journal of Jilin University Science Edition. 2014, 52 (06):  1162-1166. 
Abstract ( 240 )   PDF (331KB) ( 257 )  

We studied the numerical method and verification for singular points of overdetermined nonlinear equations. And we proposed an algorithm on the basis of the bordered system and interval theory. It outputs an approximate solution and its error bound so as to make an exact solution exist within this computed bounds.

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Finite Element Method for the Valuation ofAmerican Lookback Call Option
ZHANG Qi, GAO Jinglu
Journal of Jilin University Science Edition. 2014, 52 (06):  1167-1170. 
Abstract ( 259 )   PDF (547KB) ( 257 )  

We analyzed American lookback call option valuation problem. Using the variable mesh finite element algorithm, we obtained the discrete form of the BlackScholes equation, which is used to determine the value of American lookback option. Furthermore, we got the optimal exercise boundary using the Newton iterative method. When the two methods were alternately used, we gave corresponding numerical solutions. Finally, compared with the binomial method,
this method is efficient and the theoretical analysis.

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A Set of New Criteria for Nonsingular H-Matrices
TAI Zhiyan, LI Qingchun
Journal of Jilin University Science Edition. 2014, 52 (06):  1171-1175. 
Abstract ( 165 )   PDF (291KB) ( 172 )  

Based on the theory of α-diagonally dominant matrices and some techniques for inequlities, several new sufficient conditions to determine nonsingular H-matrices were obtained and thus the corresponding results were improved and generalized. These conditions have improved and generalized some relate existed results for Hmatrices. A numerical example was given to show the advantages of our results.

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Homotopy Method for Multiobjective Programming Problems
WANG Xiuyu, XU Weihua, JIANG Xingwu, DAI Jiaxuan
Journal of Jilin University Science Edition. 2014, 52 (06):  1176-1180. 
Abstract ( 241 )   PDF (320KB) ( 189 )  

The combined homotopy method was constructed for solving multiobjective programming problem with inequalities constraints. This method does not need that the feasible region  satisfies the normal condition. And the initial weight vector of the objective function is infeasible. The existence, boundedness and convergence of the homotopy path were proved under the above mentioned conditions.

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HPoints in Orlicz Function Spaces Endowed withthe Generalized Orlicz Norm
WANG Hongzhi, DUAN Lifen, ZUO Mingxia
Journal of Jilin University Science Edition. 2014, 52 (06):  1181-1185. 
Abstract ( 221 )   PDF (298KB) ( 146 )  

Based on the structural characteristics of the Orlicz function spaces endowed with the generalized Orlicz norm and the expositions of Hpoints in classical Orlicz spaces, the criteria of Hpoints in Orlicz function spaces endowed with the generalized Orlicz norm were presented. As its application, both sufficient and necessary conditions for Hproperty of these spaces were obtained.

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Precise Asymptotics in Complete Moment Convergence for Linear Process of α-Mixing Sequences
ZOU Guangyu
Journal of Jilin University Science Edition. 2014, 52 (06):  1186-1190. 
Abstract ( 178 )   PDF (295KB) ( 280 )  

Applying the moment inequality of α-mixing sequence and the asymptotic distribution  for linear processes generated by α-mixing sequences, the author
 obtained some results on precise asymptotics in complete moment convergence for linear process generated by α-mixing sequences.

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General Result of Precise Asymptotics for Long Memory Processes
GUAN Lihong, ZHAO Yanan
Journal of Jilin University Science Edition. 2014, 52 (06):  1191-1195. 
Abstract ( 146 )   PDF (311KB) ( 169 )  
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Asymptotic Behavior of Stochastic SI Systemwith Linear Perturbation
SUN Yan, LIU Zhenwen, ZHAO Yanan, JIANG Zhixia, TAN Haijun
Journal of Jilin University Science Edition. 2014, 52 (06):  1196-1202. 
Abstract ( 198 )   PDF (340KB) ( 229 )  

We discussed the existence and uniqueness, persistence, extinction and asymptotic behavior of the globally nonnegative solution of the stochastic SI system under certain conditions with Lyapunov analysis method. The stochastic SI system possesses stationary distributions and is ergodicity.

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Complexity Analysis for the Homotopy Method of Non-convexProgramming under Normal Cone Conditions
LIU Wei, XUE Dongmei
Journal of Jilin University Science Edition. 2014, 52 (06):  1203-1206. 
Abstract ( 148 )   PDF (292KB) ( 238 )  

The complexity of the case of nonconvex programming problem homotopy algorithm was researched. We assumed the objective function to be bounded in a fairly large range so as to avoid the nonconvex case of feasible region. The algorithm generated iterate column is not in the feasible domain. We proved the complexity of nonconvex cone planning group homotopy algorithm when the feasible region satisfied the normal cone conditions and got the corresponding estimates.

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Renormalization Group Method for the KdVBurgers Equation
HUANG Kaiyin, TIAN Hua, YANG Shuangling
Journal of Jilin University Science Edition. 2014, 52 (06):  1207-1209. 
Abstract ( 197 )   PDF (256KB) ( 307 )  

The singular perturbation initialboundary value problem of the KdVBurgers equation was discussed.  Using the renormalization group (RG) method, we gave the uniformly valid asymptotic expansion for the problem.

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Determination of Difference between the Rank andthe Number of Nonzero Eigenvalues of a Matrix
LV Hongbin, YANG Zhongpeng, FENG Xiaoxia, CHEN Meixiang, LIANG Xiaochun
Journal of Jilin University Science Edition. 2014, 52 (06):  1210-1214. 
Abstract ( 677 )   PDF (310KB) ( 326 )  

Taking the Jordan canonical form as a basic tool, we showed the determination method of the difference between the rank of matrix’s power and the number of non-zero eigenvalues, with its result independent of the Jordan canonical form.

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Existence of Solutions for a Class of Antiperiodic Boundary ValueProblems with Fractional q-Difference Equations
SUN Mingzhe, HOU Chengmin
Journal of Jilin University Science Edition. 2014, 52 (06):  1215-1218. 
Abstract ( 173 )   PDF (286KB) ( 314 )  

We studied a class of the fractional q-differences boundary value problem with the fractional q-differences boundary conditions with the aid of some standard fixed point theorems, obtaining sufficient conditions for the existence and uniqueness results of solutions. As the application, some equations were presented to illustrate the main results.

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Hyperspace System Induced by a Class of Non-primitive Substitution
WANG Wei, LI Jian, ZHU Xiaogang, LIAO Menglan, LI Junjie
Journal of Jilin University Science Edition. 2014, 52 (06):  1219-1221. 
Abstract ( 146 )   PDF (273KB) ( 199 )  

We discussed Li-Yorke chaotic properties for hyperspace systems induced by nonprimitive substitutions on two symbols. With the help of the conditions of containing Li-Yorke chaotic sets in the substitution system, we obtained the conditions for the hyperspace systems to contain Li-Yorke chaotic sets and not to contain Li-Yorke chaotic sets.

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Volatility Estimation of Financial High Frequency Data Based on Maximum Overlap Discrete Wavelet Transform
QIN Xiwen, LIU Wenbo, DONG Xiaogang, WANG Chunjie, LI Chunjing
Journal of Jilin University Science Edition. 2014, 52 (06):  1222-1226. 
Abstract ( 249 )   PDF (583KB) ( 310 )  

Integrated volatility of asset return was estimated by means of maximum overlap discrete wavelet transform. The different wavelet functions were chosen to estimate the integrated volatility of Shanghai and Shenzhen 300 indices, and relative error statistics was calculated. The results show that integrated volatilities based on different wavelets had no significant difference. The estimated accuracy was improved with the increasing of sampling frequency. There was an obvious linear relationship between logarithmic scale and logarithmic volatility. The volatility decreasd gradually with the scale increasing.

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Lower Bound Estimation for the Blowup Time of Solutions to aClass of Nonlinear Damped Hyperbolic Equations with Sources
SUN Aihui, CAO Chunling
Journal of Jilin University Science Edition. 2014, 52 (06):  1227-1229. 
Abstract ( 184 )   PDF (268KB) ( 263 )  

The authors studied the properties of solutions for the initial boundary value problem to a hyperbolic equation and obtained a lower bound estimation of blow up time for a class of nonlinear damped hyperbolic equations with sources by using the method of energy estimate and Sobolev embedding inequalities.

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Extraction of Multiword Expressions in Questions ofQuestion Answering Communities
WU Ruihong, LV Xueqiang, LI Zhuo, SHU Yan
Journal of Jilin University Science Edition. 2014, 52 (06):  1230-1238. 
Abstract ( 157 )   PDF (950KB) ( 332 )  

The multiword expressions (MWEs) in the questions of question answering communities have direct relationship with question interpretation. We first proposed the idea of extracting MWEs from the questions of question answering communities. According to the characteristics of multiword expressions in the questions, we proposed a method of extracting MWEs in questions of question answering communities. In this method, we first used mutual information method and stop words filtering method to get the candidate MWEs. Then we classified the candidate MWEs into four types: right string, incomplete string, redundancy string and error string. At last, with the help of query optimization in search engines and the candidate MWEs retrieval results on the internet, we designed a revising method to get the MWEs. We took the questions in Sina iask question library as the experimental corpus. And the results show that the precision, recall and the Fmeasure can reach 84%, 52%, 0.64 respectively, which proves the effectiveness of the proposed method.

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VM Selection EnergyEfficiency Algorithm Based on HeuristicBackward Artificial Bee Colony Method in Data Clouds
JIANG Jianhua, LIU Yu, WANG Limin, CHEN Jian, HUANG Na, WEI Xiaohui
Journal of Jilin University Science Edition. 2014, 52 (06):  1239-1248. 
Abstract ( 239 )   PDF (1044KB) ( 365 )  

Energyefficiency is a crucial issue in data center. Since dataintensive jobs have the characteristics of frequently reading and writing operations, CPU and RAM utilization rates are considered as two important influencing factors to make energyefficiency evaluation model. Artificial bee colony algorithm and heuristic backward thinking were applied to VM selection phase in VM migration policy to save energy. Compared with MMT,RS and MU algorithms in CloudSim, the proposed VM selection algorithm, ABCS, made energy 20%—25% saved and VM migration frequency less than 5%.

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Stability ThresholdBased Affinity Propagation Algorithm
WANG Limin, WANG Yizhang, HAN Xuming, HUANG Na
Journal of Jilin University Science Edition. 2014, 52 (06):  1249-1254. 
Abstract ( 225 )   PDF (657KB) ( 208 )  

In view of the performance of traditional affinity propagation algorithm greatly influenced by parameter P, a novel affinity propagation algorithm based on stability threshold was proposed. The improved algorithm can obtain the convergence of the real class number by stabilizing threshold, and then gain the corresponding parameter P. In order to improve the convergence speed, S function as convergence factor was applied to adjust damp parameter. In addition, it was successfully applied to the field of financial evaluation of listed companies. Simulation experimental results show that the improved clustering algorithm could obtain better precision and quicker convergence, and is obviously better than traditional affinity propagation clustering algorithm.

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RealValued Detector’s Generation of Negative Selection Algorithm: Optimization and Simulation
MEN Hong, CHEN Peng
Journal of Jilin University Science Edition. 2014, 52 (06):  1255-1260. 
Abstract ( 261 )   PDF (1873KB) ( 168 )  

Since current conventional negative selection algorithm does not pay attention to the occurrence of autoimmune detector, and the presence of autoimmune detector will reduces the accuracy of fault diagnosis and other analogous areas, a method which can discover and eliminate pathogenicity detector was proposed. We specially designed a rule to detecting the presence of pathogenicity detector. With the help of MATLAB software, we simulated irregular dist
ributed selfdata, annulus distributed selfdata and nearly circle distributed selfdata. Results show that our method can effectively eliminate 90% of the pathogenic detector, enhance the robustness and adaptive ability of the immune negative selection algorithm.

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Numerical Implementation of Adaptive Fidelity TermDenoising Algorithm Based on Total Variation
WANG Hongzhi, LIU Wanjun, HAN Xiao
Journal of Jilin University Science Edition. 2014, 52 (06):  1261-1266. 
Abstract ( 332 )   PDF (3955KB) ( 239 )  

On the basis of the classical algorithm of the image denoising based on total variation, a numerical algorithm of total variation based on adaptive fidelity term was proposed. Different intensities of denoising were used to avoid the shortages of the traditional method and then numerical method was chosen so as to realize our algorithm. On the premise of the classical total variation, our method made up for the shortcomings of the original ladder and excessive smoothing effect, especially for the image denoising of fine texture and detail images, it made the remain of most of their image characteristics. Our
 treatment can be applied to a series of image processing based on partial differential equations simply.

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Internal Parameter Optimizing Method of CameraCalibration Based on Genetic Algorithm
XU Zhongyu, LI Chunlong, SUN Qiucheng, NING Chuang
Journal of Jilin University Science Edition. 2014, 52 (06):  1267-1271. 
Abstract ( 217 )   PDF (530KB) ( 251 )  

An internal parameter optimizing method of camera calibration based on genetic algorithm was proposed. This method is a reamendment of internal parameter obtained by Zhang Zhengyou calibration. It can rectify the loss of precision caused by unreliable initialization and locally optimal solution and improve the calibration precision of interior parameters of the camera. The result shows that the performance of this method is stable. It can quickly and
 accurately calibrate the camera internal parameters.

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Weight Determine Method for Comprehensive SimilarityCalculation about Concept of Ontology
CHENG Jinhui, ZHENG Shanhong, LI Wanlong, YUE Shaomin
Journal of Jilin University Science Edition. 2014, 52 (06):  1272-1276. 
Abstract ( 215 )   PDF (346KB) ( 477 )  

Using the theory of rough set and conditional information entropy, we presented a strategy to automatically determine the weight in connection with determining weight in integrated similarity calculation relying too heavily on domain experts in the ontology mapping method based on similarity calculation. In full consideration of uncertain information using the influence degree of each attribute on the system information entropy to determine each attribute’s weight in the current information system made the automatic mapping of ontology and semantic network realtime services possible. At last, the feasibility of this method was verified by examples.

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A Universal Modeling Method for Networked Control SystemBased on Least Squares Support Vector Machines
SUN Dan, QIN Guihe, DONG Jinnan, CHEN Hong
Journal of Jilin University Science Edition. 2014, 52 (06):  1277-1283. 
Abstract ( 198 )   PDF (556KB) ( 226 )  

In connection with the realtime signal transmission of networked control system, least squares support vector machine theory was used to predict and compensate bad effects caused by transmission uncertainties so as to establish a model of networked control system. Experiments were carried out to validate the correctness and applicability of this method. The simulation results show that least squares support vector machine modeling can improve the dynamic performance and stability of networked control system, which makes up the periodic transmission of sampled signals taking up a lot of network bandwidths and unnecessary network traffic defects, and improve the system reliability.

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Image FCMRBF Neural Network ClassifierBased on Zernike Moment Features
NI Peng, HUANG Wei, LV Wei, YAO Yu
Journal of Jilin University Science Edition. 2014, 52 (06):  1284-1287. 
Abstract ( 281 )   PDF (1921KB) ( 339 )  

In order to solve the problem of nonhigh image recognition accuracy for traffic monitoring, an image classification was proposed based on radial basis function (RBF) neural network. Zernike array less noise sensitivity, shape features and good stability were considered to build a fourthorder array feature vector for feature extraction; and an adaptive fuzzy clustering method fuzzy Cmeans was used to solve hidden neurons uncertain of RBF neural network. The simulation analysis shows that the classifier has a higher recognition rate than the classifier based on fuzzy Cmeans clustering algorithm of
BP and RBF neural network, a lower computational complexity than RBF neural network classifier with particle swarm of fuzzy Cmeans clustering algorithm, though they have similar recognition rate. Simulation and experiments show that this method has better classification capabilities and higher computational efficiency.

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AutonomousBranching Constraint Solving Aided byDom/ddeg Decision Making
WANG Haiyan, LI Chuang, ZHANG Liang, DONG Yanhua
Journal of Jilin University Science Edition. 2014, 52 (06):  1289-1292. 
Abstract ( 328 )   PDF (311KB) ( 205 )  

The authors proposed a new autonomousbranching constraint solving algorithm AUTOdom/ddeg aided by decision making on the basis of the current autonomousbranching constraint solving methods. To verify the efficiency of AUTOdom/ddeg, abundant comparison experiments on Benchmarks were carried out. The experimental results show that AUTOdom/ddeg can significantly improve the efficiency of constraint solving.

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Improved Fuzzy C-Means Clustering Algorithm
GUO Xinchen, FAN Xiuling, XI Xiantian, HAN Xiao
Journal of Jilin University Science Edition. 2014, 52 (06):  1293-1296. 
Abstract ( 261 )   PDF (364KB) ( 208 )  

A new fuzzy C-means clustering algorithm was proposed by  the introduction of functions of separation between clusters into FCM clustering algorithm and with the nature of semisupervised learning considered. The model of semisupervised FCM clustering algorithm with the information entropy as constraints was established and the solution to the model was derived. The simulation experiments were performed on UCI data sets to verify the effectiveness of the proposed algorithm. The experimental results show that this modified algorithm gets the better validity and performance.

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Self-assembly of the Blends of Rod/Coil Diblock Copolymers
HAN Xianggang, WANG Pengfei
Journal of Jilin University Science Edition. 2014, 52 (06):  1297-1300. 
Abstract ( 234 )   PDF (1758KB) ( 176 )  

Based on the selfconsistent field theory of lattice model in two dimension space, the selfassembly of the blends of diblock copolymers was studied. For the blends of long/small two diblock copolymers in which volume fraction of rod block equal that of coil block, when blend fraction of the two diblocks was not comparable, lamellae were observed, and their thickness was  related with the length of the big blend fraction of the two diblock copolymers; on the other hand, as blend fraction of the two diblocks is comparable, the new ordered structures, including lamellar strips and coexisted lamellae and strips, were observed. These new ordered structures did not appear in the rod/coil diblock copolymer melts. The results are related to the asymmetry of the chain conformation and the blend of rod/coil diblock copolymer.

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Density Functional Theory of NO Adsorption and Dissociation on Ir(110) Surface
HE Chaozheng, MA Zhipu, ZHANG Shuai, ZHOU Dawei, PU Chunying,LU Cheng, ZHONG Zhiguo, LI Shuo, LI Genquan
Journal of Jilin University Science Edition. 2014, 52 (06):  1301-1305. 
Abstract ( 207 )   PDF (1573KB) ( 245 )  

Density functional theory and periodic slab model were adopted to systemically study NO adsorption, dissociation and N2 formation on Ir(110) surface. The results show that the most of stable sites are the top sites with the nitrogen bonding to Ir atoms, the shortbridge sites are less stable and the hollow sites are the  least of all. There are two paths for the  dissociation of NO adsorbed on the top sites: One is direct dissociation; and the other  is diffusion from top site to shortbridge site firstly and then dissociation. The results of potential energy surface show that the second path is more favorable than the first one, and is the primary path for NO dissociation. Two N atoms from the dissociated NO form a dishortbridge structure to recombine into N2.  In addition, the predosed O atom enhances the N atoms combination reaction, which is consistent well with experiment result.

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Preparation and Characteristics of9,10Bis(3,5difluorostyryl)anthracene Organic Nanowires
WANG Ying, ZHAO Jihong, LIU Lianqing, XU Bin
Journal of Jilin University Science Edition. 2014, 52 (06):  1306-1310. 
Abstract ( 237 )   PDF (4745KB) ( 412 )  

9,10-Bis(3,5-difluorostyryl)anthracene (TFDSA) organic nanowires with high quality were fabricated by the reprecipitation method. The nanowires were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and photoluminescence (PL) spectroscopy etc. The results show flat the nanowires are 20—30 μm in length and 400 nm in width, and emits strong green fluorescence with a peak at 538 nm and typical strong waveguide behavior. Asprepared TFDSA nanowire is able to serve as single wire active optical waveguide due to propagating light on a sub-wavelength scale. TFDSA can be used as candidates for potential nanoscale photonic devices.

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Alternating Current Characteristics of Flexible Pressure SensorBased on Nanocarbon Black/Silicon Rubber
FENG Jianchao, XIA Yan, MEI Haixia, ZHANG Tong
Journal of Jilin University Science Edition. 2014, 52 (06):  1311-1315. 
Abstract ( 319 )   PDF (1096KB) ( 274 )  

A pressure sensor of  nano\|carbon black/silicon rubber conductive composite was fabricated on the ceramic substrate with interdigital electrodes. Piezoresistive characteristics of the sensor were investigated under alternating current drive. The results demonstrate the sensor exhibited positive piez
oresistive effect at a frequency of 1 kHz. The polarization intensity of space charges on the interface between nanocarbon black and silicone rubber decreased and the positive piezoresistive effect weakened as the working frequency increased. The response time and recovery time of sensor were within 3 s in the processes of loading and unloading. The resolution of the sensor was 0.5 N in the continuous loading process. 

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Synthesis and Luminescence Properties ofMonodisperse SiO2∶Eu3+ Microspheres
GONG Lina, ZOU Haifeng, ZHENG Keyan, LV Lei, SHENG Ye, HUO Qisheng
Journal of Jilin University Science Edition. 2014, 52 (06):  1320-1324. 
Abstract ( 226 )   PDF (5192KB) ( 181 )  

Three methods (basecatalyzed method, acidcatalyzed method and seed growth method) have been used to prepare SiO2∶Eu3+ microspheres. Meanwhile, optimal synthesis conditions of the SiO2∶Eu3+ microspheres were obtained. The results indicate that the best method was the seed growth method, by which the average diameters of obtained particles are approximately 370—380 nm, and the final product has nice homogeneity, monod
ispersity and sphericity. The final SiO2∶Eu3+ microspheres showed a strong red emission under ultraviolet excitation.

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Chaos Generated by ErbiumDoped Fiber SingleRing Lasers
FENG Yuling, CHANG Feng
Journal of Jilin University Science Edition. 2014, 52 (06):  1320-1324. 
Abstract ( 118 )   PDF (5192KB) ( 163 )  

The chaotic behaviors generated by an erbiumdoped fiber (EDF) singlering lasers(EDFSRL) were investigated experimentally via the delay feedback method. The chaotic characteristics of this system were studied by observing the time series and power spectrum.  An optical delay feedback loop was added in the system. Thus, by changing the intensity and retardation time of the optical delay feedback signal, the freedom of this EDFSRL system was increased.  The experimental results indicate that the erbiumdoped fiber singlering laser system can generate chaos through the perioddoubling bifurcation route under the experimental conditions selected by us.

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Mass Ratio Determination of Compound FlunarizineHydrochloride Powder Drug Baseed on ShortWaveNearInfrared Diffuse Reflectance Spectral Data
QU Nan, ZHU Mingchao, DOU Sen
Journal of Jilin University Science Edition. 2014, 52 (06):  1325-1330. 
Abstract ( 261 )   PDF (767KB) ( 205 )  

A new method for the nondestructive quantitative prediction of flunarizine hydrochloride powder drug based on shortwave nearinfrared (SWNIR) diffuse reflectance spectral data. With the analytical data of high performance liquid chromatography (HPLC) taken as the reference value, a quantitative analysis model for describing the relationship between the spectral characteristic and component was established via combining genetic algorithm (GA) with neural networks. The neural network topological framework was constructed automatically by means of GA. The optimal network parameters and spectral region were selected. Moreover, the influences of different spectral preprocessing methods to the prediction ability of neural network were discussed. The mass ratio of the test sample was predicted. The results of the experiment show that the firstderivative spectrum is the optimal pretreatment method of modeling, by which the rootmeansquareerrors (RMSE) for test set was 0.198 7%, and the correlation coefficients R for test set was 0.986 3.

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Electrocatalytic Oxidation of Formaldehyde onPlatinum Load on Polyaniline Electrode
CHEN Zhongping, CHU Daobao, QIN Jiacheng, SONG Changchun, WANG Xuchun, CHEN Junhua, GUO Jiahao, ZHANG Ting
Journal of Jilin University Science Edition. 2014, 52 (06):  1331-1336. 
Abstract ( 244 )   PDF (4095KB) ( 212 )  

Polyaniline(PAn) was loaded on Tibased metal electrode and platinum was loaded on polyaniline, and Pt/PAn/Ti was prepared by cyclic voltammetry (CV) and was characterized by SEM and CV. Electrocatalytic oxidation of formaldehyde on platinum load on polyaniline electrode was investigated by reseaching the electrocatalytic oxidation of formaldehyde on Pt/PAn/Ti electrode. The result shows that electrocatalytic oxidation of formaldehyde was related with the quantity of platinum microparticles. Platinum microparticles were dispersed better, showing bigger effective area. Compared with that of the Pt/Ti electrode with the same quantity of platinum deposited, the peak current of formaldehyde in the positive scanning was increased 2.3 times and oxidation potential was negatively shifted by about 40 mV on Pt/PAn/Ti electrode. The peak current of formaldehyde in the negative scanning was increased about 5 times and oxidation potential was negatively shifted by about 30 mV. At the same time, the result shows, too that the oxidation peak in the positive scanning was controlled by liquid phase mass transfer process and the oxidation peak in the negative scanning was controlled by adsorption behavior.

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Influence of Nd Doping on Band Gap and PhotovoltaicPerformances of DyeSensitized Solar Cell Based on ZnO
ZHANG Lingyun, JIA Ruokun, SUN Xuhui, ZHANG Yingjie, LIU Chunguang
Journal of Jilin University Science Edition. 2014, 52 (06):  1337-1341. 
Abstract ( 243 )   PDF (3549KB) ( 354 )  

Nddoped ZnO was prepared by a simple solution method. Xray diffraction analysis (XRD) demonstrates that Nd atoms have been successfully incorporated into the lattice of ZnO. UVVisible absorption spectra (UVVis) show that Nd doping has led to a red shift of the absorption edge of ZnO to
the visiblelightregion, which shows Nd doping has narrowed the band gap of ZnO. Nd doping obviously improves the shortcircuit photocurrent density and overall light conversion efficiency of dyesensitized solar cell based on ZnO photoanode. When doping concentrations of Nd were 0.5%,10%, and 1.5% respectively, shortcircuit photocurrent densities  were 9.51,13.01,1079 mA/cm2 respectively,  and overall light conversion efficiencies  were 2.28%,2.84%, and 2.48% respectively.

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Influence of Doping Methods of Palladium on n-Hexane Aromatization and SulphurResistance of Pt/KL Zeolite
WAN Hai, ZHANG Xiaoyu, ZHANG Ruojie, SONG Lijuan
Journal of Jilin University Science Edition. 2014, 52 (06):  1342-1348. 
Abstract ( 197 )   PDF (1147KB) ( 234 )  

Through impregnation and hydrothermal synthesis method, another metal Pd was doped into the Pt/KL catalyst to carry on the modification. The results show that two different ways of introducing Pd have little effect on the crystal structure and pore size distribution of the molecular sieve, but have relatively remarkable influence on its surface acidity. In the fixedbed microreactor, the influences of Pd doping methods on the Pt/KL catalyst activity of n-hexane aromatization and sulfur resistance performance were investigated. The results show that the impregnation method of doping metal Pd can bring more improvement of n-hexane aromatization reactivity, selectivity of aromatic hydrocarbon and sulfur resistance than the hydrothermal method. The analysis indicates that the PtPd/KL catalyst prepared by impregnation enhances metallicity via interaction of Pd and Pt, hence enhances the aromatization activity and sulfur resistance; while Pd in the Pt/Pd KL catalysts prepared by hydrothermal synthesis method enhances the acidity of the catalyst and reduces the aromatization activity and sulfur resistant ability of the catalyst.

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