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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 September 2007, Volume 45 Issue 05
数学
Invariance of Estimator of Scale Parameter under a Class of Symmetric Loss
XU Bao,, WANG Dehui, FU Zhihui,
J4. 2007, 45 (05):  697-700. 
Abstract ( 1353 )   PDF (226KB) ( 418 )  
For scaleparameter family c(x,n)ηe-T(x)/η, we dealt with the property of the Bayes estimator and the admissible estimator of η=τr with the theory of intergral transformation, under the function of symmetricentropy loss L(η,d)=ν(η/d+d/η-2), for a random sample of size n arising from scaleparameter population {(1/τ) f(x/τ), τ>0}. We have proved the invariance of the two estimators in one-one mapping.
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Composition of Generalized Derivations in \=Left Ideals of Prime Rings
MA Jing,, XU Xiaowei
J4. 2007, 45 (05):  701-706. 
Abstract ( 1278 )   PDF (159KB) ( 341 )  
Using structure properties of prime rings satisfying GPI and the relation of vector spaces and their endmorphism rings, we showed that it is posible that the composition of two generalized derivations with special forms may act like generalized derivation on the left ideals of prime rings. And we got an equivalent condition for generalized derivations to have this property.
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Sufficiency and Duality for (h,φ)Multiobjective Programming with Generalized Convexity
YU Guolin, ZHANG Suling
J4. 2007, 45 (05):  707-712. 
Abstract ( 1258 )   PDF (182KB) ( 331 )  
Under the assumptions of two classes of generalized (h,φ)convex functions, this paper deals with the optimality and duality for(h,φ)multiobjective programming problem by using analytic method. The sufficient optimality conditions and dual theorems were established for (h,φ)multiobjective programming problem.
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Riesz Approximation of Setvalued Martingale in the Limit and Its Convergence
LI Gaoming, ZHAO Hui
J4. 2007, 45 (05):  713-716. 
Abstract ( 1124 )   PDF (165KB) ( 362 )  
Let (X,‖·‖) be a real separable Banach space with the dual X*, (Ω, B ,P) be a complete probability s pace, further, {Bn, n≥1} be a increase sub σ-fields filtration of B , and B=∨Bn, we proved the Riesz approximation theorem of setvalued martingales in the limit, and made use of the results present the convergence theorenm of setvalued martingales in the limit.
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Primaldual Point Method for Nonlinear Programming
ZHANG Shan, JIANG Zhixia,, LIU Yuanhui
J4. 2007, 45 (05):  717-722. 
Abstract ( 1849 )   PDF (277KB) ( 489 )  
An exponent barrier penalty function and a primaldual interior point method were applied to solving nonlinear programming problems. Furthermore, a global convergence theory was established via the framework of line search methods.
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Lattice Boltzmann Simulation of Twodimensional Flows in Orthogonal Channel with Higher Reynolds Numbers
ZHANG Guiru, YAN Guangwu
J4. 2007, 45 (05):  723-726. 
Abstract ( 1060 )   PDF (315KB) ( 311 )  
The 9Bit lattice Boltzmann model was used to simulate the twodimensional orthogonal channel flows. We obtained the position distribution and evolution patterns of eddy core with different Reynolds number flows.
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Applied Criteria for Nonsingular H-Matrix
GUO Wei, SUN Yuxiang
J4. 2007, 45 (05):  727-732. 
Abstract ( 1377 )   PDF (212KB) ( 369 )  
Using α diagonally dominant matrix, we proved some new sufficient conditions to judge nonsingular H-matrix and thus we extended the criteria of nonsingular H-matrix.
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A Filled Function Method for Solving Global Optimization Problem
JIANG Zhixia,, HUA Qiuling
J4. 2007, 45 (05):  733-737. 
Abstract ( 1276 )   PDF (236KB) ( 312 )  
A filled function is proposed based on the objective function and the square of the distance between variate and extremum point. With the filled function, from a minimum point we can find another minimum point at which the value of the function is less than the former value. We have proven it can make the function reach to the global minimum but not maximum or saddle point value to select r properly. Finally steps and examples of the algorithm are given.
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Admissibility for Linear Estimators in a Multivariate Linear Model with Respect to an Inequality Restriction
HE Daojiang, GUO Dawei
J4. 2007, 45 (05):  738-742. 
Abstract ( 1434 )   PDF (219KB) ( 375 )  
The admissibility of both homogeneous and inhomogeneous linear estimators was investigated in a multivariate linear model with respect to an inequality restriction. The relationship between admissibilities of the two types of estimators was characterized. The necessary and sufficient conditions for a linear estimator LY(LY+L1) to be admissible in a class of homogeneous (nonhomogeneous) linear estimators under quadratic loss were obtained.
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An Inexact Infeasibleinteriorpoint Algorithm for Secondorder Cone Programming
CHI Xiao ni, LIU Sanyang, ZHANG Xiao wei
J4. 2007, 45 (05):  743-747. 
Abstract ( 1409 )   PDF (281KB) ( 341 )  
A primaldual inexact infeasibleinteriorpoint algorithm is presented for solving the secondorder cone programming problems. By means of introducing an infeasible neighborhood, the algorithm allows the use of inexact search directions and does not require iteration points to be within the sets of strictly feasible solutions. Then the proposed algorithm is shown to be global convergent.
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Clifford Algebra of Spacetime Plane and Abel Complex Number System
LI Wuming, ZHANG Xuefeng
J4. 2007, 45 (05):  748-752. 
Abstract ( 1064 )   PDF (174KB) ( 300 )  
It is proved that the three kinds of complex numbers (elliptic complex number, hyperbolic complex number and parabolic complex number) of Abel complex number system are composed of three 2dimensionel subalgebra of Clifford algebra Cl1,1 in spacetime plane; and it is pointed out that the possibility of the Euclid plane, Minkowski plane and Galileo plane can be studied in the same frame. Finally the unified expression of plane Euclid transformation, Lorentz transformation and Galileo transformation is given.
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Design of Feedback Controller for Neutral Linear Systems Based on New Type Observational State
WANG Yan qing,, QIAN Cheng shan, JIANG Chang sheng
J4. 2007, 45 (05):  753-756. 
Abstract ( 1231 )   PDF (212KB) ( 324 )  
The problems concerning the design of output feedback controller for a class of neutral delay systems were investigated and a staged designing scheme of the observer and controller was then presented. The output fee dback controller, which is delay-independent and meets design requirements, can be obtained by means of solving three linear matrix inequalities. Finally, a simulation illustration was given to show its effectiveness.
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Quadratic Variation of Local Square Strong Martingale
CHEN Huichan, ZHANG Zhuokui, REN Xiaohong
J4. 2007, 45 (05):  757-760. 
Abstract ( 1166 )   PDF (159KB) ( 339 )  
Based on the definition of the quadratic variation of the local square strong martingale, the properties of the quadratic variation of the local square strong martingale are discussed. Some important results, namely, the quadratic variation of the local square strong martingale having the properties of linearity, continuity, martingale and so on were obtained.
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Nonlinear Diffusion System with Evolution p-Laplacianin the Presence of Fast Reaction
CHANG Xiuling, DUAN Chengming, GAO Wenjie
J4. 2007, 45 (05):  761-763. 
Abstract ( 1287 )   PDF (183KB) ( 432 )  
A mathematical model describing the interaction between virus and antibody was studied. The authors modified the origional model first by replacing the Laplacian in the origional model with a nonlinear p-Laplacianoperator and then proved the existence and uniqueness of the weak solutions to the model. Also, the authors studied the limit behavior of the solution as the reaction rate tended to infinity. The result obtaind coincides with the case one can observe.
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Estimation of Scale Parameter of Exponential Distributionunder p,q-Symmetric Entropy Loss Function
DU Yujing, SUN Xiaoxiang, YIN Jiangyan
J4. 2007, 45 (05):  764-767. 
Abstract ( 1523 )   PDF (214KB) ( 369 )  
By means of the parameter estimation, under the p,q-symmetric entropy loss function, the Bayesian estimation, the minimum risk equ ivalent estimation and the minimax estimation of the exponential distribution were presented. Futhermore, when 0≤c*, d>0; c=c*, d>0, the estimator with the form of [cT+d]-1 is admissible; when c<0 or d<0; 0* and d=0; c>c* and d>0, [cT+d]-1is inadmissible.
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Theorems about Martingale Approximation andResolvent Representation Convergence
HU Hua
J4. 2007, 45 (05):  767-770. 
Abstract ( 1060 )   PDF (189KB) ( 279 )  
By means of introduction martingale approximation of stationary ergodic Markov process and the resolventrepresentation of St(f), it is improved that a martingale approximation of St(f) exists if and only if the resolvent representation of St(f) converges and corresponding results are also formulated for Markov chains, showing that the method of constructing a martingale approximation to an additive functional of a stationaryergodic Markov process via the resolvent has universality under this kind of condition.
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Condition of a Kind of Functional Differential Equation with p-Period Solution and Expression of Periodic Solution
GAI Ping
J4. 2007, 45 (05):  771-774. 
Abstract ( 1309 )   PDF (177KB) ( 309 )  
A condition based on functional differential equation x(t)=-λf [x2(t)+x2(t-1)+α]x(t-1)(α,λ∈R, λ>0) with 4/(4k+1) periodic solution x(t)is given via the gengerating method to form exact differentialequation of periodic solution and a kind of expression of the periodic solution x(t).
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Asymptotic Distribution of a Kind of Dirichlet Distribution
SONG Lixin, CHEN Fei, LI Han
J4. 2007, 45 (05):  775-778. 
Abstract ( 1401 )   PDF (161KB) ( 262 )  
This paper deals with a conclusion that the asymptotic distribution of the Dirichlet distribution by using central limit theorem and slutsky theorem.
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Simulation and Analysis of Control Strategies of Traffic Lightswith Indeterminate Information
XING Yumei, WANG Kangping, LIU Yuqiu, ZHAO Sen, WANG Jianyu, GUO Dongwei, ZHOU Chunguang
J4. 2007, 45 (05):  779-784. 
Abstract ( 1069 )   PDF (358KB) ( 384 )  
Based on the Green Light District (GLD) simulator of tr affic, several control strategies of traffic lights were implemented. The analysi s was focused on Longest Queue, Relative Longest Queue, Reinforcement Learning, SARSA and GA control strategies. Under three different states of the traffic flo w, i.e., undersaturatedtraffic, intermediatesaturated traffic and oversaturated traffic, simulation was completed separately. The different performances between these traffic control strategies were researched for the determinate and indeterminate information of traffic flow, and the data of analysis were given. The experiment data shows, about traffic flow information, the global control strategies are more susceptive than the local ones. They require the veracity of the traffic flow information.
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Three Key Issues of Multiauctioneer Model in Computer Grid
PAN Tong,, FANG Zhiyi, HUANG Mengzou, LI Ruixue
J4. 2007, 45 (05):  785-790. 
Abstract ( 1148 )   PDF (339KB) ( 296 )  
Multiauctioneer system was adopted in auction to manage computer economy network resources allocation. Thus three crucial problems related to the auctioneer system were researched such as the prevention of auctioneer’s deception (including judging and dealing with auctioneer’s deception), the choice of auctioneers, and the making of deal price, and solutions to them were proposed. In addition, applying network model and Gridsim, a kind of simulator tool, to simulate network environment, applying multiauctioneer system to conduct experiment of resource management and task dispatch and analyzing the resultsof experiments in different conditions were conducted to verify the feasibility of the computer network multiauctioneer system.
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Algorithm of Adaptive Thresholds of Template Matching for Vehicle Detection in Video Flow
LIU Yuqiu, WANG Kangping, XING Yumei, GUO Dongwei, WANG Jianyu, ZHOU Chunguang
J4. 2007, 45 (05):  791-794. 
Abstract ( 1513 )   PDF (302KB) ( 348 )  
On the basis of traditional successive images difference, threshold processing was made to the region of interest which was obtained by the method of successive images difference, getting foreground which is represented by white pix and background which is represented by black pix, then a new algorithm was designedto detect the vehicle algorithm of adaptive thresholds of template matching for vehicle detection in video flow. Experiments demonstrate that the algorithm is simple, implemented easily, and can detect the vehicle exactly.
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An Ontology-based Question Solution Student Model
BAI Yan, LIU Dayou, LIU Jie
J4. 2007, 45 (05):  795-799. 
Abstract ( 1239 )   PDF (226KB) ( 346 )  
With the plane geometry problem as the target, the subjective examination questi on solution was analyzed to built a kind of the ontologybased question solution student model method (ontologybased solution student model) so as to realize the assessment of the design of student model, provide the knowledge express method based on ontology and suitable for subjective solution, the follow method in subjective solution process, the assess method in answ er intelligence. The ontology method realizes knowledge shows. It can assessesthe situation of students mastering knowledge from a lot of respects, so as to realize guiding student studies to a certain extent.
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Nonstandard Inferences of Description Logic and Application
ZHANG Yinping, LIU Lei
J4. 2007, 45 (05):  800-804. 
Abstract ( 1202 )   PDF (219KB) ( 261 )  
Two nonstandard inferences in description logic concept contraction and concept abduction, which respectively extend satisfiability and subsumption, were used to solve matching problem between supplies and demands. The improved rank algorithm and the algorithm which helps to perfect the resource and requirement descriptions of suppliers and demanders were proposed. The improved rank algorithm favors the interaction of suppliers and demanders, exclu des the partially matched supplies and demands for strict constraintsas soon as possible, consequently quickens the execution speed of the algorithm.
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Technique of Model Transformation Based on QVT Standard
LI Xiaochun, LIU Shufen, YU Zhuoer, WANG Qi, GENG Tongcheng
J4. 2007, 45 (05):  805-809. 
Abstract ( 1255 )   PDF (238KB) ( 264 )  
This paper introduces weave and existing model transformation techniques. According to the advantages and disadvantages of these te chniques, a new model transformation technique is presented based on Query/Views/Transformation (QVT) standard. Based on the above technique and the powerful function of model transformation in the language of Kermeta, a model transformation to ol of fourlayer structure was designed based on mapping by layering the core of QVT, implements the transformation from Ecore metamodel to Kmt metamodel.
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Grid Service Emergent for Ecological Grid Platform
ZHAO Kaiqin, WANG Feng, LI Mingchu
J4. 2007, 45 (05):  810-814. 
Abstract ( 1333 )   PDF (299KB) ( 229 )  
Mechanisms of natural ecological systems combined with technology of mobile agent were used to design a novel Ecological Grid Platform. We implemented bioentities with the characteristics of mobile agent and biolo gical individual, and designed their behavior algorithms on the platform. The Bioentities can offer effectively various kinds of grid service and applications by service emergence and evolution. Accordingly it can solve some problems in current grid computing architecture, such as intelligence, agility, selfextension, adaptability.
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Design of Network Camera Based on DSP and Engineering
JI Bin, ZHOU Chunguang, XIE Yuchen, YU Zhezhou
J4. 2007, 45 (05):  815-818. 
Abstract ( 1119 )   PDF (277KB) ( 247 )  
An engineering method for the design of the embedded system was presented, according to which a network camera framework was discussed and an implement of the camera was given. It solves the problem how to use only one general-purpose Digital Signal Processor (DSP) chip as the core of network camera, and achieves relatively nice results in the experiments.
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An Implicit Algorithm of Image SegmentationBased on Geodesic Active Contours
LUO Hongwen, MA Siliang, MIAO Ligang
J4. 2007, 45 (05):  819-821. 
Abstract ( 1239 )   PDF (207KB) ( 327 )  
An addtive operator splitting (AOS) method is introduced in the geodesic active contours model and used in microscopic cell segmentation of urine sediment. The discretization scheme is implicit and unconditionalstable. It overcomes the drawback of unstable for explicit scheme. The experimental result is satisfying.
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物理
Growth and Electrical Properties of ZnO Films Deposited on Freestanding Thick Diamond Films
SUN Jian,, BAI Yi zhen,, YANG Tian peng, SUN Jing chang, DU Guo tong,
J4. 2007, 45 (05):  822-826. 
Abstract ( 1189 )   PDF (340KB) ( 306 )  
ZnO thin films were prepared on the smooth nucleation surfaces of freestanding CVD thick diamond films by metal organic chemical vapor deposition (MOCVD) with two-step growth method. The growth and electrical properties of the ZnO films are characterized experimentally. The ZnO film deposited at a substrate temperature of 600 ℃ exhibited a clean surface with c-preferred orientation and had a mobility of 3.79 cm2/(V·s).
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Synthesis and Characterization of Y Doped BaZrO3 Protonic Conductors under Common and High Pressure
XUE Yan feng, WANG Ye, XU Da peng, LI Li ping, GUO Xing yuan, SU Wen hui,,
J4. 2007, 45 (05):  827-830. 
Abstract ( 1385 )   PDF (323KB) ( 411 )  
Samples BaZr1-xYxO3(x=0,0.05,0.10,0.15,0.20) were prepared by solid-state reaction method under high-pressure and high-temperature. XRD and Raman measurements show that the products obtained by solid state reaction method at 1 300 ℃ belonged to cubic perovskite structure, but part of high degree diffract peaks split slightly. The samples (x=0,0.05) were in pure cubic perovskite structure under high pressure (3.6 GPa) and temperature (500 ℃), which shows that press can accelerate the reaction. But some BaCO3 and m-ZrO2 appeared in other samples (x≥0.1), which shows that press baffled the reaction. Under 3.6 GPa at1 000 ℃, the peaks of BaO appeared clearly and increased with the content of Y3+. Therefore, to synthesis cubic perovskite structure BaZr1-xYxO3 under high-pressure and high-temperature, the temperature should be below 500 ℃.
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Calculation of Triple Differential Cross Section for Argon 2pOrbital in Coplanar Asymmetric Geometry
HU Xiao ying, ZHOU Ya jun
J4. 2007, 45 (05):  831-833. 
Abstract ( 1141 )   PDF (243KB) ( 286 )  
We modified the distorted wave Born approximation method (DWBA) by introducing polarization interaction into the distorted potential of DWBA. The triple differential cross section (TDCS) of the argon 2porbital in a coplanar asymmetric geometry was calculated, Calculational results by means of the modified DWBA method show that polarization effects are very important for ionization of argon 2p shell.
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Analysis on Non\|linear Chaos Characteristic of Fetal Heart Rate Time Series
WANG Li yuan, LIU Yu ping, YANG Li ping, XIAO Qing, HAN Fei
J4. 2007, 45 (05):  834-838. 
Abstract ( 1252 )   PDF (324KB) ( 377 )  
Signal change of fetal heart rate is reflected by the function of the circulatory system and the central nervous system. Understanding the dynamics behavior of fetal heart rate is a kind of simple method to infer the situation of fetus in the uterus. According to the characteristic of FHR signal belonging to the short data time series, the FHR signal was analyzed by means of the surrogate data method combined with correlation dimension, the largest Lyapunov exponent and complexity which can identify chaotic features. The research indicates that there are remarkable discriminations between the FHR signal and the surrogate data produced by two groups of two kinds of null hypotheses respectively, indicating that the FHR signal has the nonlinear components and chaos characteristic quantity criterion S>2, which explains that the FHR signal has nonlinear chaos characteristic.
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电子科学
A Method of Line Detection Based on Ridgelet Transform in Airborne SAR Image
MA Xin, SUN Peng
J4. 2007, 45 (05):  839-843. 
Abstract ( 1128 )   PDF (363KB) ( 340 )  
The present paper gives a method of line detection in image based on the ridgelet transform. We used this method to detect the linear aim in radar image. The result of the experiment shows the method is available.
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化学
Activities of Vanadiabased Catalysts Prepared with Different Methods for Dehydrogenation of Isobutane to Isobutene
MA Hongchao, FU Yinghuan, WANG Zhenlü, ZHU Wan chun, JI Dinghao, WANG Guojia
J4. 2007, 45 (05):  844-848. 
Abstract ( 1248 )   PDF (279KB) ( 289 )  
The V-Al-O catalysts prepared via impregnating, co-precipitation, hydrothermal, concentration, and hydrothermal fluid drying, were characterized via XRD, TPR, TPD and ESR, etc. At the same time, they were compared with V2O5/γ-Al2O3 catalyst prepared via impregnation in the structure and dehydrogenation activities for dehydrogenation of isobutane to isobutene. It was found that the activities of the catalysts were obviously dependent on the preparation methods. The catalyst with large surface, surface enriched and well dispersedvanadia showed a higher dehydrogenation activity. Furthermore, the amount of Lewis acid on the surface of the catalyst was also an important factor to affect the selectivity of catalyst for isobutene.
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Nondestructive Quantitative Analysis of Norvasc in Tablets by Artificial Neural Network Methodnear Infrared Spectroscopy
LIU Mingyang,, ZHAO Jinghong, MENG Yu
J4. 2007, 45 (05):  849-852. 
Abstract ( 1400 )   PDF (267KB) ( 287 )  
Artificial neural network (ANN) algorithm was used to analyse the near infrared (NIR) reflectance spectrum of Norvasc in tablet medicine. The content of amlodipine besylate, which was pharmaceutically available in Norvasc medicine, was accurately nondestructively quantitatively determined. The best model of ANN was designed. The effects of input nodes and hidden nodes on the results were discussed, respectively. Compared the results with those of HPLC, the relative error (RE%) of mlodipine besylate was less than 4.2%. 
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Onepot Synthesis of Polysubstituted 2Amino Thiophenes
LIU Li, LI Zheng, LI Hongbin, LU Hang, DING Changjiang, DONG De wen
J4. 2007, 45 (05):  853-856. 
Abstract ( 1815 )   PDF (226KB) ( 270 )  
Polysubstituted 2-aminothiophenes were onepot-synthesized from β-oxo amides with 1-isothiocyanatobenzeneand ethyl 2-bro moacetate in the presence of K2CO3 in N,N-dimethylformamide (DMF) in very high yield. The products were characterized by means of NMR, IR and elemental analysis. Moreover, a mechanism for the reaction was proposed.
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Preparation and Characterization of TiO2/SiO2 Composites
YUAN Meirong, REN Suxia, GUO Yupeng, ZHAO Xu, LIU Yanhua
J4. 2007, 45 (05):  857-860. 
Abstract ( 1116 )   PDF (278KB) ( 340 )  
TiO2-SiO2 composites with large specific surface a reas (up to 308.6 m2/g) were synthesized from wollastonite and titanium sulfate in the absence of any surfactants under finely tuned several experimental conditions. Calcium sulphate, as a faintly soluble substance in water, plays an important role in the formation of pores in the nanocomposites. The microstructure and chemical composition of nanocomposites were characterized by means of X-ray diffractometry, transmission electron microscopy and N2 adsorption and desorptionanalysis. The as prepared titanium dioxidesilicon dioxide nanocomposites with high specific surface areas and wellcrystallized anatase contents could be used as an efficient photocatalyst.
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Preparation and Characterization of PVP Microspheres/Nanospheresby Electrospinning Method
DU Jianshi,, SONG Yan, BAI Jie, YANG Qingbiao, WANG Shugang, LI Yaoxian, DONG Chuanying, ZHANG Xiaoxi, XIAO Jianye, YUAN Hong
J4. 2007, 45 (05):  861-864. 
Abstract ( 1135 )   PDF (478KB) ( 281 )  
Poly(vinyl pyrrolidone) (PVP, K30) was chosen as the material to prepare its solutions with different concentrations, which were then used to prepare a series of electrospray products by means of electrospinning technologies. The morphologies of the products were characterized by scanning elect ron microscopy (SEM). We researched how the concentration of PVP had affected the morphologies of products. The results show that in the same solvent and under the identical conditions, the concentration of PVP was crucial. The pure micro and nanospheres were obtained when the concentration of PVP reached a certain fixed value.
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Application of Ultraviolet Spectrophotometryartificial Neural Network in the Simultaneous Determination of Purines
LI Nan, MA Chengyou, CHENG Qinghong, WANG Yinghua
J4. 2007, 45 (05):  865-868. 
Abstract ( 1417 )   PDF (241KB) ( 267 )  
Ultraviolet spectrophotometry combined with artificial neural network can be used to determine simultaneously. Adenine,xanthine, hypoxanthine and guanine at spectra wavelength from 200~300 nm. The effect of pH on the absorbance of the system was discussed, and the parameters of netwo rk were selected. The method is simple and rapid and RSD is less than 3.7%.
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生命科学
Genetic Analysis on Mitochondrial DNA ofXibe Population in Xinjiang
YU Changchun,, LI Wen rong, XIE Li, ZHANG Xiaolei, ZHOU Hui,, ZHU Hong
J4. 2007, 45 (05):  869-872. 
Abstract ( 2143 )   PDF (338KB) ( 408 )  
48 sequences of hypervariable segment Ⅰ (HVSⅠ) in mitochondrial DNA c ontrol region from Xinjiang Xibe population were analyzed, in which, 35 haplotyp es were found by 43 polymorphic sites. The haplotype diversity and nucleotide di versity are 0.982 and 0.018, respectively, and the mean of nucleotide number dif ferences is 5.922. When the data from relevant populations published were considered, it was found that the Xibe ethnic population presented the closest genetic affinity to ancient Tuoba Xianbei population and, also showed a closer genetic affinity to the nomadic populations from northern China, suggesting that the Xibe people may be the descendants of the ancient Tuoba Xianbei.
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Genetic Diversity of Mitochondrial DNA Dloop Sequences in Tibetan Horses
CAI Dawei,, HAN Lu, LI Shengnan, ZHOU Hui,, ZHU Hong
J4. 2007, 45 (05):  873-878. 
Abstract ( 1472 )   PDF (289KB) ( 294 )  
Mitochondrial DNA (mtDNA) Dloop sequences of 23 individual horses from Lhasa and Zedang in Tibet were analyzed. The results reveal 16 unique haplotypes, 32 polymorphic sites (31 transitions and 1 deletion), which account for 9.27% of the total number of sites in DNA sequence analyzed. The hapl otype diversity (h) and nucleotide diversity (π) were 0.93±0.04 and 2. 51%±0.16%, respectively, showing that abundant mitochondrial genetic diversity exists in Tibetan horses. Moreover, the phylogenetic analysis and multidimension al scaling analysis were performed based on the mtDNA sequences of Tibetan horses and the related Eurasian horse populations. The results show that Tibetan horses have widespread maternal origin. Tibetan horses are closely related to the populations from Near Asia, Central Asia and Europe, whereas they are less related to the populations from Mongolia and Korea.
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Effects of Interaction of Phosphatealuminumfluoride on Adsorption Characteristics of Fluoride in Tea Garden Soil
XIE Zhonglei, SUN Wentian, CHEN Zhuo, YIN Bo
J4. 2007, 45 (05):  879-885. 
Abstract ( 1461 )   PDF (328KB) ( 308 )  
Effects of interaction of phosphatealuminum fluoride on the adsorption characteristics of fluoride in tea garden soil were studied via the imitated test. Adsorption equilibrium of fluoride in the tea garden soil was reached at nearly 25 min and the adsorption amount of fluoride in the soil increased tith the initial concentration of fluoride within test concentration under the control conditions. The equilibrium time was shortened and the adsorption amount decreased in the presence of phosphate. However, the equil ibrium time was prolonged and the adsorption amount decreased at different ratios fofluoride to aluminum. The effect of aluminum on the adsorption amount of fl uoride was more significant with increasing the proportiom of aluminum. Comparing with no phosphate, the adsorption amount of fluoride increased in the co-existence of aluminum and fluoride with different ratios at a low concentration of phosphate, and decreased in the co-existence of aluminum and fluoride with different ratios at a high concentration of phosphate. The two equations of Freundlich and Temkin can be used to describe the thermodynamics characteristics of the adsorption of the soil for fluoride in the tea garden soul whether phosphate and aluminum exist or not, however, the Langmuir equations can only be used to describe the adsorption characteristics of the adsorption of the soil for fluoride for a few cases.
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