Please wait a minute...
Information

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)
WeChat

WeChat: JLDXXBLXB
随时查询稿件状态
获取最新学术动态
Table of Content
26 January 2012, Volume 50 Issue 01
Blowingup Solutions of a Type of Nonlinear Systemof |Fractional Differential Equations
DAI Qun, LI Huilai
J4. 2012, 50 (01):  1-05. 
Abstract ( 1046 )   PDF (296KB) ( 448 )  

The authors focused on the study of a type of nonlinear system of timefractional differential equations, and obtainsed the system of the integral equations which is equivalent to the system of nonlinear partial differential equations with timefractional derivative via the approach of Laplace transformation, and proved the existence of local solutions to the system of the integral equations. In addition, we investigated the blowingup  solutions to the nonlinear system of fractional differential equations   using Hlder’s inequality, and obtained the blowingup solution of equation set in a finite time.

Related Articles | Metrics
Optimality Condition of a Class of Generalized Invex Functions
WANG Cailing, LU Xiu shuang
J4. 2012, 50 (01):  6-10. 
Abstract ( 841 )   PDF (287KB) ( 385 )  

We introduced new notion of generalized invex functions on Banach space and proved some result. Using these functions, we obtained the
conditions of optimality with constraint conditions when the objective function is realvalued and vectorial functions. Moreover, necessity and sufficiency of optimality for vectorial problems were given.

Related Articles | Metrics
A Method about Polynomial Preconditioning Technique
LIU Bo, LIU Fengnan
J4. 2012, 50 (01):  11-14. 
Abstract ( 644 )   PDF (309KB) ( 358 )  

A method of multiple polynomial preconditioning technique for positive definite symmetric linear equations was proposed based on the na
ture of the quadratic function. It was proved that the method can make condition number better so as to improve operation efficiency. On the basis, a method of approximate solution of equations was designed, and the theoretical results and numerical results show the effectiveness of the method.

Related Articles | Metrics
Numerical Simulation of Flow Past a CircularCylinder near a Moving Plane
ZHENG Haicheng, SHI Weiping, LI Xiuwen
J4. 2012, 50 (01):  15-20. 
Abstract ( 666 )   PDF (645KB) ( 331 )  

The flow past a circular cylinder near a moving plane was simulated. The circular cylinder was placed over a moving plane which moved at the same velocity of uniform flow at the inlet. The Reynolds number was 1 000 in present simulation. The gap ratio was defined as G/D, where G represents the nearest distance of circular cylinder to the moving plane and D is the diameter of the circular cylinder. Numerical simulations show that the flow patterns are very different at various gap ratios. Compared with those of flow past an isolated circular cylinder, the present lift and drag coefficients increase obviously, and the vortex shedding is suppressed by the plane.

Related Articles | Metrics
LayerStripping Reconstruction Algorithm forRadially Symmetric Conductivity
FENG Tianhong, MA Fuming
J4. 2012, 50 (01):  21-26. 
Abstract ( 704 )   PDF (455KB) ( 346 )  

The authors gave a numerical algorithm of reconstructing radially symmetric conductivity by means of the LayerStripping method, in pa
rticular, the three choices to determine the reconstruction layers to enhance the stability of the algorithm. A number of numerical tests show the feasibility of the method.

Related Articles | Metrics
Existence of Perodic Solution for a Class of ThirdOrderp-Laplacian Equation with a Deviating Argument
SHEN Qinrui, ZHOU Zongfu
J4. 2012, 50 (01):  27-34. 
Abstract ( 796 )   PDF (419KB) ( 287 )  

Continuation theorem in coincidence degree theory, a type of third order p-Laplacian equation with a deviating argument
p((x(t)-cx(t-σ))″))′+f1(x(t))x′(t)+f2(x′(t))x″(t)+ρ(t)g(x(t-τ(t)))=e(t) was considered with the sufficient condition for the existance of Tperiodic solution obtained.

Related Articles | Metrics
Convergence of the Series of Fuzzy Numbers
ZHAO Zhitao, WU Congxin, HAO Cui xia
J4. 2012, 50 (01):  35-43. 
Abstract ( 677 )   PDF (534KB) ( 346 )  

Using the concept of level sets of fuzzy numbers, we considered the convergence problems for the series of fuzzy numbers in the sense of the usual order relation. With regard to the convergence for the series of fuzzy numbers with positive terms, general terms and Leibniztype, we obtained the
 corresponding convergence tests respectively, so as to extend some basic properties of the classic series.

Related Articles | Metrics
Idempotent Rank of |Semigroup PC(n,r)
ZHAO Ping, YOU Taijie, XU Bo
J4. 2012, 50 (01):  44-48. 
Abstract ( 872 )   PDF (280KB) ( 380 )  

Let PCn be the semigroup of all order\|decreasing and or
derpreserving partial transformations on a finitechain [n]. For an arb
itrary integer r such that 3≤r≤n-1, the rank and idempotent rank of the
 semigroup PC(n,r)={α∈PCn: 〖JB(|〗Im(α)〖JB)|〗≤r} were studied. We s
howed that PC(n,r) is generated by idempotents of rank r. Furthermore, we
obtained that the rank and idempotent rank of PC(n,r) are both equal  to ∑〖
DD(〗n〖〗k=r〖DD)〗〖JB((〗〖HL(1〗nk〖HL)〗〖JB))〗〖JB((〗〖HL(1〗k-1r-1
〖HL)〗〖JB))〗.

Related Articles | Metrics
Some Convergence Properties for Weighted Sum ofMixing Random Arrays
HU Xueping, LI Huibao
J4. 2012, 50 (01):  49-53. 
Abstract ( 763 )   PDF (297KB) ( 301 )  

Using the moment inequality for 〖AKρ~D〗mixing
 sequences, 〖AKφ~D〗mixing sequences and truncated method, we investigat
ed the weak convergence, the Lr convergence and the complete convergence f
or weighted sum max〖DD(〗〖〗1≤j≤kn〖DD)〗〖JB((〗∑〖DD(〗j〖〗k
=1〖DD)〗ankXnk-E∑〖DD(〗j〖〗k=1〖DD)〗ankXnk〖JB))〗
 of 〖AKρ~D〗mixing arrays and 〖AKφ~D〗mixing arrays under the
condition of {ank, 1≤k≤kn, n≥1}uniform integrability. The resul
ts presented in this paper have extended and improved some results in related li
terature.

Related Articles | Metrics
Implementation of Group Encryption AlgorithmBased on Conic Curve over Finite Fields
LIU Haifeng, WU Peng, MA Lingkun
J4. 2012, 50 (01):  54-58. 
Abstract ( 664 )   PDF (470KB) ( 444 )  

Matrix group of conic curve points was first created according to group theory and applied to the improved algorithm of Hill cipher as an instance. A group encryption system based on conic curve point sequence was constructed. Comparison of conic curve cryptography with ECC was made in the aspects of plaintext  embedment and order\|calculation. Safety performance of improved Hill encryption algorithm was discussed, too. The instance demonstrates the advantages of conic curve group cryptosystem in the  aspects of design and application. The algorithm has a definite practical value and popularizing significance.

Related Articles | Metrics
k-Generalized Hermite Matrices andTheir Application in Matrix Equation
YUAN Huiping, WANG Xingrong
J4. 2012, 50 (01):  59-62. 
Abstract ( 807 )   PDF (261KB) ( 295 )  

The concept of k-generalized Hermite matrix was given, and its properties and relations to unitary matrix, Hermite matrix, Hamilton matrix and generalized inverse matrix, and its matrix equation of application were  discussed, with many new results  obtained. The  corresponding  results of unitary matrix, Hermite matrix and generalized symmetric  matrix, especially  the Cayley decomposition of orthogonal matrix to  k-generalized unitary matrix and k-generalized Hermite matrix were extended, unifying  various kinds of  Hermite matrix and generalized inverse matrix.

Related Articles | Metrics
On Relative L-Closure Operators and T0 Closure Spaces
J4. 2012, 50 (01):  63-66. 
Abstract ( 876 )   PDF (245KB) ( 276 )  

The concepts of relative L-closure operator and relative T0 closure space were introduced in L-closure spaces. Some
 properties of them were discussed. It was proved that the heredity, the productivity  and L-good extension of separation are all valid. Finally, the relation beween T0 separation and relative T L-closure space separation was investigated.

Related Articles | Metrics
Moment Exponential and Moment Asymptotic Stabilities ofRunge-Kutta Methods for Stochastic Differential Equations
ZHANG Yuxin
J4. 2012, 50 (01):  67-68. 
Abstract ( 688 )   PDF (187KB) ( 379 )  

Moment exponentical and moment asymptotic stabilities of RungeKutta method with strong order 15 for stochastic differential equations
  was studied. We have proved that for scalar linear test equations, these stabilities   of RungeKutta method are equivalent and we gave the conditions for these  stabilities existing.

Related Articles | Metrics
Numerical Simulation of Flow Past a Main Cylinderwith an Affiliated Cylinder
TAN Lingyan
J4. 2012, 50 (01):  69-72. 
Abstract ( 630 )   PDF (510KB) ( 315 )  

The flow around a main cylinder affiliated by cylinders in the near wake of the main cylinder was simulated by means of lattice Boltzmann method. It was found that the drag coefficient of the main cylinder with a single affiliated cylinder was decreased. The variant drag coefficient changed periodically.  The drag coefficient of the main cylinder is further decreased if two affiliated cylinders were placed near the wake of the main cylinder.

Related Articles | Metrics
A Family of Iteration Methods with Third Order Convergencefor Nonlinear Equation
LIU Tianbao, WANG Peng
J4. 2012, 50 (01):  73-76. 
Abstract ( 882 )   PDF (242KB) ( 364 )  

We presented a family of iteration methods for solving the approximate solutions of the nonlinear equations f(x)=0. We
 proved the iteration methods have third\|order convergence, and the methods have the advantage of avoiding the computation of the second Frechet derivative. We performed different numerical tests that confirm the theoretical results. Our methods can compete with Newton’s method and some cl
assical thirdorder methods.

Related Articles | Metrics
Moment Complete Convergence for Partial Sums ofArrays 〖AKρ~D〗 Rowwise Mixing Random Variables Sequence
XIA Baofei, WU Qunying, GUO Jin
J4. 2012, 50 (01):  77-80. 
Abstract ( 765 )   PDF (220KB) ( 281 )  

The complete convergence for the partial sums of arrays 〖AKρ~D〗 rowwise mixing  random variables sequence was obtained under the certain conditions via the  moment’s inequality of 〖AKρ~D〗 mixing sequence and the Markov inequality.

Related Articles | Metrics
Evolution of Brain Functional Network Properties during Acupuncture
WANG Haiyang, WANG Jiang, LI Hongli, WEI Xile, DENG Bin
J4. 2012, 50 (01):  81-88. 
Abstract ( 702 )   PDF (940KB) ( 454 )  

Function brain network was built according to electroencephalogram (EEG) data. Using some specific methods (such as functionality network chart, cluster coefficient, degree distribution, entropy, etc), we analyzed the five functional networks, and discovered how acupuncture works. The results show that correlation between each node and network structure changed clearly before, during  and after the acupuncture. Our conclusion is that acupuncture is able to affect the firing properties of the central nervous system, and make the information transmission in the brain functional sections stronger.

Related Articles | Metrics
Impact Analysis of Ontology Evolution Based on Dependency Graph Model
SHANG Jin, ZHANG Rui, Lv Shuai, LIU Lei
J4. 2012, 50 (01):  89-94. 
Abstract ( 776 )   PDF (459KB) ( 314 )  

Studying the semantics of the description logic SHOIN(D), we clarified the dependency relations between the elements in the evolving ontology and proposed a dependency graph model for the ontology. Based on this model, the concept of impact frequency was defined and an algorithm was proposed to compute it.

Related Articles | Metrics
Matching Preprocessing Technology of Binocular Stereo Vision
CHANG Shuhua, SONG Yanqiu, YANG Yongmin
J4. 2012, 50 (01):  95-100. 
Abstract ( 895 )   PDF (1235KB) ( 302 )  

To solve the problem existing in the application of binocular stereo vision imagepair, a threestages matching preprocessing method was proposed. This method combines the wavelet denosing algorithm and histogram equalization method effectively. The random noise and Gauss noise of image are filtered and luminance difference between stereo imagepairs is balanced at the same time. Finally the contrast of imagepairs was improved by Laplace sharpen processing. The effectiveness of threestages matching preprocessing algorithm was proved by experiment. The application of the algorithm could improve the matching accuracy of stereo imagepairs effectively.

Related Articles | Metrics
HDFS Based Cloud Data Backup System
GUO Dong, DU Yong, HU Liang
J4. 2012, 50 (01):  101-105. 
Abstract ( 806 )   PDF (537KB) ( 404 )  

The authors introduced cloud computing into data backup area, designed and implemented a hadoop distributed file system(HDFS)
 based data backup system, which  meets users’ needs of data backup/restore by applying existed cheap computers to setting up a data b
ackup cluster. By means of  the strategies of deviding users into groups, of packaging and uploading small files and of restoring first, the system’s performance is enhanced. HDFS based data backup system designed in this paper has the strengths in security, expansibility, economy, and reliability.

Related Articles | Metrics
A New Method of Personality_OCC Affective Model
SUN Fengfang, ZHU Xiaodong, LIU Yuanning, ZHANG Xiaoxu, ZHANG Wei, LI Weita
J4. 2012, 50 (01):  106-110. 
Abstract ( 1329 )   PDF (584KB) ( 382 )  

Firstly emotion classification, personality, outside simulation etc. were quantified with the help of matrix, then  two transferring matrixes were created, which combined  personality and emotion cognitive structure model with OCC model. Thus a new thought of emotion model: Personality_OCC model was proposed. A virtual driver emotion simulation experiment of automobile pervasive computing proves that humanbeings’ personalities can cause direct effect on emotion.

Related Articles | Metrics
Application of Prediction Model Based on PCRRBFSVM to Finance Data
WANG Zhe, WANG Youli, SUN Wenwen, Lv Wei
J4. 2012, 50 (01):  111-113. 
Abstract ( 1105 )   PDF (273KB) ( 320 )  

On the basis of support vector machine algorithm and the result of principal component regression of the linear prediction and radial basis function neural network of the nonlinear prediction, a new forecasting model was proposed by which one can effectively improve the prediction accuracy and
 solve the problem of single prediction. Application of the new prediction model to the prediction of finance data showed that compared with the traditional principal component regression and radial basis neural network method, the new model has better effect and practical significance in prediction.

Related Articles | Metrics
Dynamic Evolvements of Lamellae and Zigzag Lamellae in Rod-Rod Diblock Copolymers
HAN Xiang gang, MA Yong hong, ZHAO Cun hu, ZHANG Cheng xiang
J4. 2012, 50 (01):  114-117. 
Abstract ( 857 )   PDF (569KB) ( 288 )  

External potential dynamics method was used  to  study the dynamic evolvements of lamellae and Zigzag lamellae in rod\|rod diblock copolymers with the help of lattice model. The calculated results show that the same middle structure was formed in the two dynamic processes.

Related Articles | Metrics
A First\|Principles of Elastic and Electronic Properties of Nb2N3
ZHU Ying, XU Dan, LI Quan jun, CHEN Hong bin
J4. 2012, 50 (01):  118-121. 
Abstract ( 905 )   PDF (427KB) ( 358 )  

The crystal structure, dynamics, lattice dynamics, and electronic properties of Nb2N3 were studied by means of  first\|principles method of the density functional theory. The results show that Nb2N3 has orthogonal η-Ta2N3 structure at normal pressure, the elastic constants of this structure meet the Bonn\|Huangkun criterion, and its lattice is dynamics stable. Nb2N3 has  large bulk modulus (304 GPa) and hardness (19.3 GPa). Because of the hybridization of 4d orbital of Nb and 2p orbital of N forming three\|dimensional Nb\|N covalent bonds, Nb2N3 is ionic semiconductor materials.

Related Articles | Metrics
Preparation and Performance Characterization |of Zinc Oxide Thin Films by Means of Sol Gel Method
XIN Chun yu, ZHANG Ji de, LIU Cheng you, JIANG Da yong, QIN Jie ming
J4. 2012, 50 (01):  122-125. 
Abstract ( 703 )   PDF (617KB) ( 367 )  

Zinc oxide thin films were synthesized on  glass substrates by means of sol\|gel method.The X\|ray diffraction (XRD) results show  that the grain size increased with the increasing of annealing temperature, which was confirmed by the morphology by atomic force microscopy (AFM). The   UV\|Vis results show  that there is a stronger absorption on the near band edge of zinc oxide and the  bandgap of the film at 600 ℃ by means of annealing treatment is 3.23 eV. Room\|temperature photoluminescence (PL) results show that all films  show UV emission peak at  386.5 nm, the deep level emission is restrained by the increase of annealing temperature.

Related Articles | Metrics
X-Ray Diffraction Patterns of Quenched and Annealed Nylon 6 Crystals
WANG Zhao hong, LI Yong hua, MENG Fan ling, ZHAO Zhu di
J4. 2012, 50 (01):  126-128. 
Abstract ( 762 )   PDF (282KB) ( 327 )  

Nylon 6 films were prepared by means of quenching after isothermal crystallization and annealing. The crystallization behavior of the nylon 6 films was investigated via X\|ray diffraction. When the temperature was higher than 443 K isothermal crystallization and the temperature was higher than 473 K for annealing of nylon 6, a high temperature crystallization peak appears at 2θ=28.5°. The intensity of high temperature crystallization peak depends on the thermal history of the film. If the films were cooled in air after isothermal crystallization and annealing, no high temperature crystallization peak exists. The possible causes of the high temperature crystallization peak were analyzed based on the experiment results.

Related Articles | Metrics
Fukui Function for Performance of Hemerythrin Carrying
CUI Baoqiu, ZHAO Dongxia, YANG Zhongzhi
J4. 2012, 50 (01):  129-133. 
Abstract ( 711 )   PDF (424KB) ( 293 )  

The charge distribution and Fukui function of the atoms of the active central site of the hemerythrin were calculated in terms of the atombond electronegativity equalization method (ABEEM). In the two iron atoms of deoxyhemerythrin, Fukui function of one iron atom which is about to bind O2 is the biggest. This shows that the iron atom in deoxyhemerythrin has a high activity, that is, it easily carrys O2. Fukui function of the iron atom binding O2 is smaller than that of the protonated oxygen atom in O2. This also shows that hemerythrin can release O2. When the deoxyhemerythrin binds the potassium cyanide and sodium azide inhibitions, the Fukui functions of the two iron atoms are smaller than those of the Cl and N coordinated atoms. The function of deoxyhemerythrin carrying O2 is weakened or inhibited, which is in agreement with the experiment.

Related Articles | Metrics
Corn Resistant Single Gene Lines to Exserohilum turcicum and TheirApplication to Identification of Physiological Races of E.turcicum
ZHANG Guizhen, LIU Jinliang, HU Ruixue, Ali Khatib Bakar,ZHANG Yanhua
J4. 2012, 50 (01):  134-138. 
Abstract ( 602 )   PDF (410KB) ( 442 )  

Thirty inbred lines such as A632, B37, B73, B68, C103 and Va26 from the inbred collection at the University of Illinois  were used to determine physiological races of Exserohilum turcicum in the field. Twenty\|one inbred lines from the inbred collection were selected to dete
rmine physiological differentiation of E.turcicum effectively in China.  Thirty\|two single conidial isolates of E.turcicum were collected th
roughout 15 farming areas of Jilin Province. All the 32 isolates were race zero. There was no physiological differentiation of the pathogen.

Related Articles | Metrics
Expression Pattern of MAPKs Genes in Sorghum bicolor under Stresses of NaCl and Na2CO3
CHEN Hongyu, FENG Shudan, LIU Xiangguo, YIN Yuejia
J4. 2012, 50 (01):  139-146. 
Abstract ( 753 )   PDF (811KB) ( 373 )  

The availability of sorghum genome makes it possible to perform the genomewide analysis of the expression profile of MAPKs genes in Sorghum bicolor under the stresses of NaCl and Na2CO3 so as to explore the MAPKs involvement into salinealkali signaling pathway. The results show that 16 MAPKs genes were dentified from the genome of Sorghum bicolor, namely SbMPKs, and their expression profiles under the stresses of NaCl and Na2CO3 differ from each other significantly. This suggests that neutral saltinduced signal response may differ from that induced by alkaline salt. Under the stress of NaCl, all SbMPKs were upregulated continuously during 24 h except the SbMPK13 whose expression reached to the maximum at 12 h. Under the stress of Na2CO3, however, only SbMPK3,SbMPK10 and SbMPK13 were upregulated, implying that  SbMPKs are likely responsible specifically for alkaline salt stress in sorghum. P
hylogenetic analysis classified SbMPK13 into the C group of MAPKs,  which is similar toOsMAPK2 that  is responsible to ABA and salt stress in rice, further confirming that it is involved possibly in the regulation of salt stress response genes in sorghum.

Related Articles | Metrics
UltrasonicAssisted Extraction of Polyphenol fromNeedles of Pinus prokoraiensis
XUN Erna1, ZHANG Chunli2, XIE Xiaona3, CHEN Shupin
J4. 2012, 50 (01):  147-152. 
Abstract ( 680 )   PDF (586KB) ( 333 )  

Polyphenol was extracted from the needles of Pinus prokoraiensis by means of ultrasound with ethanol as solvent. Effects of ethanol
 volume concentration, liquid to solid ratio (V(solvent) ∶[KG-*3]m(needle)), ultrasonic wave power, ultrasonic temperature as well as ultrasonic time were investigated and then the optimum extraction conditions were screened out. Under the optimum conditions, extraction time could be decreased by 3 h and extraction quantity of total polyphenol (52.97 mg/g) could be achieved under ultrasound. Compared with that of ethanol extraction, the extraction quantity was increased by a factor of 25.76% through ultrasonicassisted extraction.

Related Articles | Metrics
DhHP6 Protection of Caenorhabditis elegans from Heat Shock Injury Induced by Au Nanoparticles
GUO Changrun, GUAN Shuwen, HUANG Lei, ZHANG Chao,DONG Biao, SONG HHongwei
J4. 2012, 50 (01):  153. 
Abstract ( 703 )   PDF (427KB) ( 365 )  

Using the lightheat conversion induced by Au nanoparticles, we created a new experimental method of heatshock for Caenorhabditis
elegans. DhHP6 is a mimetic peroxidase designed and synthesised by our laboratory. C.elegans was incubated with Au nanoparticles at the concentration of 30 μmol/L and exposed to the infrared lights at a intensity of 3 W/cm2 for 8 min. The results showed that DhHp\|6 had protective effect on the C.elegans in this heat\|shock conditions.

Related Articles | Metrics