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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 May 2008, Volume 46 Issue 03
数学
Estimation and Numerical Scheme of Unsteady Solution of JohnsonSegalman Model
LI Songtao, ZHANG Xuli, YANG Rong, HUANG Mingyou
J4. 2008, 46 (03):  389-392. 
Abstract ( 1102 )   PDF (211KB) ( 531 )  
With the JohnsonSegalman (JS) model as a model of the shear flow of polymeric fluid, we proved that unsteady solution is bounded and presented a priori estimation in Sobolev norm and an upwind scheme with ε=0 for the model.
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Supercyclicity of Operators
SHI Luoyi, WU Yujing, WANG Lifei
J4. 2008, 46 (03):  393-396. 
Abstract ( 1114 )   PDF (343KB) ( 361 )  
According to a Sufficient and necessary condition for a sequence of operators to be Hypercyclic, we obtained a criterion for an operator to be Supercyclic. Applying this criterion to the bilateral weighted shifts with nonzero weights, we gave a Sufficient and necessary condition for a bilateral weighted shift with nonzero weights to satisfy this criterion.
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Computable Operators on Coregular Subsets
QIU Yuwen, ZHAO Xishun
J4. 2008, 46 (03):  397-402. 
Abstract ( 1568 )   PDF (331KB) ( 332 )  
For co-regular subsets in metric spaces, previous work has identified twelve distinct reasonable representationsand its induced computability. With respect to those basic notions we investigated the computabilityof natural operations on coregular sets: union, intersection, complement, the interior of a closed set, image and preimage under suitable classes of functions. The results show that only few of these representationsare uniformly computable in the sense of rendering all those operations.
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Lattice Boltzmann Simulation of Walldriven Incompressible Viscous Flow in a Semicircular Cavity
DING Lixia, SHI Weiping, ZHENG Haicheng
J4. 2008, 46 (03):  403-407. 
Abstract ( 1323 )   PDF (415KB) ( 354 )  
Based on lattice Boltzmann method, a walldriven incompressible viscous flow was simulated in a semi-circular cavity. The treatment for curved boundary with second accurate was used to obtain the streamlinesand vorticity contours and the velocity component along the center line of semi-circular cavity of the steady states for different Reynolds numbers. When Reynolds number is small, the final steady state flow consistsof one vortex only. As Reynolds number increases, a secondary vortex arises. The size of the vortices is associated with Reynolds numbers too. The numerical results show that lattice Boltzmann method is simple, effective, and suitable to handling the case.
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A Hilberttype Inequality with the Kernel of -2-OrderHomogeneous and a Parameter
YANG Bicheng
J4. 2008, 46 (03):  408-412. 
Abstract ( 1093 )   PDF (159KB) ( 396 )  
Upon evaluating the weight coefficient, a Hilbert type inequality with the kernel of -2order homogeneous and a parameter and the equivalent form are established. The cases of reverse are also considered.
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A Regiongrowing Algorithm for Triangular Mesh SurfaceReconstruction from Pointcloud Data
GAO Fushun,, ZHANG Dinglin, LIANG Xuezhang
J4. 2008, 46 (03):  413-417. 
Abstract ( 1214 )   PDF (343KB) ( 485 )  
A new regiongrowing algorithm is presented for triangular mesh surface reconstruction from pointcloud data. The algorithm makes the full use of geometric and topological information inherent in the pointcloud data and adopts a series of examining rules to reconstruct triangular mesh surface rapidly. The algorithm consists of two steps: Firstly, an initial data thinning is performed to reduce the data set size. Secondly, the process of the region-growing is started from an initial triangle and is followed by choosing an appropriate point to form a satisfied triangle for each active edge in the boundary of advancing front. The triangulated region is growing repeatedly by updating boundary repeatedly. According to the relative position between the active edge and the candidate points, in presented examining rules, different thresholds are used. This avoids generating overlapping facets, selfintersection and wrong topology. The examining rules ensure the quality of reconstructed triangular mesh surface. In accordance with the problemof the advancing front broken, the overlappingedge of the opposite direction is used. This ensures to have only one boundary of advancing front throughout. Experimental results show that the algorithm has many advantages, such as high efficiency, accuracy and generality.
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Nonlinear Boundary Value Problem with Conjugate Value forHypermonogenic Function Vectors in Clifford Analysis
YANG Liu
J4. 2008, 46 (03):  418-422. 
Abstract ( 1316 )   PDF (258KB) ( 310 )  
Applying the method of integral equations and Schauder fixedpiont theorem, we investigated a nonlinear boundary value problem with conjugate value for hypermonogenic function vectors in Clifford analysis and achieved the existence and representations of its solutions.
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Existence of Positive Solution for Elliptic Boundary Value Problemwith Critical Sobolev Exponent and Critical Dimension
RAO Ruofeng, HUANG Jia lin
J4. 2008, 46 (03):  423-427. 
Abstract ( 1149 )   PDF (203KB) ( 337 )  
An existence theorem of positive strong solution for a Dirichlet problem with the critical Sobolev exponent was given by way of MountainPass Lemma and Strong Minimum Principle, which extended the corresponding results obtained by Brezis and Nirenberg to a threedimension space, the critical dimension space for the Dirichlet problem.
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Analytical Approximations to Periods of Nonlinear Oscillatorswith General Potential Functions
LI Pengsong, SUN Weipeng
J4. 2008, 46 (03):  428-432. 
Abstract ( 1079 )   PDF (229KB) ( 334 )  
Based on the analytical approximations to period of nonlinear oscillators with even potential functions, a new analytical approximate period to nonlinear oscillators with general potential functions is established. The new approximation converges fast and it can also be used to derive the analytical approximate periods of nonlinear oscillators with general potential functions having the form of piecewise expressions.
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A Note of Isotropic Submanifolds with Constant Mean Curvature
YIN Songting,, SONG Weidong
J4. 2008, 46 (03):  433-437. 
Abstract ( 1263 )   PDF (183KB) ( 385 )  
Let Mn be an isotropic submanifold of Sn+p(c), constantH be mean curvature of Mn. Under the condition of equivalence of isotropic submanifolds and via divergence theorem, it is concluded that if the section curvature of Mn is not less than [n/2(n+1)](H2+c), then Mnis a totally umblilic submanifold or a Veronese submanifold in a totally umbilical hypersurface of Sn+p(c).
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Another Form of Intersection Theorems on GeneralizedConvex Spaces and Its Application to Variational Inequality
PIAO Yongjie, YIN Zhe
J4. 2008, 46 (03):  438-442. 
Abstract ( 1324 )   PDF (217KB) ( 311 )  
Another form of intersection theorems was obtained by means of classical KKM principle and the basic KKM type theorem on generali zed convex spaces, and then an important property of transfer openclosed valued map was given, finally the existence problem of solution for generalized variational inequality was discussedas the application of intersection theorem.
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An Approximate Closeform Formula of Deferred Arithmetic Average Asian Options
ZHANG Dong, LU Changyu, AN Yu e
J4. 2008, 46 (03):  443-447. 
Abstract ( 1211 )   PDF (290KB) ( 283 )  
It was supposed that the dynamic moving process of the stock price and the return was driven by Geometry Brownian Motion and the lognormal distribution respectively. Takinginto account the riskneutral environment, we got a closedform analytical formula for deferred arithmetic asian options by the method of Taylor expansion of the stochastic integral formula within the terminal payoff. Furthermore, with the series definition of the definite integral, we transferred the continuous problem into a discrete one which is simpleenough to figure out. Meanwhile we tested the accuracy of the formula with the Monte Carlo simulation as a benchmark and the result shows that the formula can be utilized to price the related financial derivatives.
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Neural Network for Solving Quadratic Programming Problems
WANG Yong, WU Tieru, MA Runing
J4. 2008, 46 (03):  448-452. 
Abstract ( 1599 )   PDF (356KB) ( 355 )  
This paper presents a dual neural network which is globally exponential convergence for solving quadratic programming problems based on linear equation, inequation and bounded constraint. Compared with other neural network models which contained highorder nonlinear condition, the dual neural network uses less neuron and has simpler structure. Finally, numerical tests show the validity of the model.
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Existence and Uniqueness of Weak Solutions fora Class of CahnHilliard Equations
CHAI Shimin, YIN Yunguang, GONG Chengchun, YIN Li
J4. 2008, 46 (03):  453-456. 
Abstract ( 1652 )   PDF (164KB) ( 284 )  
A class of the CahnHilliard equations with nonconstant mobility was studied. With the aid of Nirenberg’sinequality, some priori estimates are presented in the case of the mobility is m(x,t). Then the existence and uniqueness of the weak solutions are given by means of LeraySchauder fixed point theorem.
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On Adjacent Strong Edge Coloring of Some Regular Graphs
WANG Cuiqi, MIAO Zhengke
J4. 2008, 46 (03):  457-460. 
Abstract ( 1180 )   PDF (195KB) ( 285 )  
We studied ASEC of a class of graphs G(n,n,r)(n=1,2(mod 3)), then proved the conjecture that any graph G(V,E)(G(V,E)≠C5)with |V(G)|≥3 satisfies Δ(G)≤χ′αs(G)≤Δ(G)+2 is correct.
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Non-primitive Substitutions of Two Symbols and Chaos
LIAO Gongfu,, CHEN Zhizhi
J4. 2008, 46 (03):  461-462. 
Abstract ( 1173 )   PDF (132KB) ( 230 )  
Having investigated the subshifts induced by those non-primitive constantlength substitutions on two symbols, we gave an equivalent condition for such a subshift to be LiYorke chaotic and proved that each of the subshifts has no distributively scrambled sets.
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Variational Iteration Method for Solving PeriodicBoundary Value Problems
ZHAO Shu feng,, YU Jun,, WEI Yuanhong
J4. 2008, 46 (03):  463-465. 
Abstract ( 1391 )   PDF (180KB) ( 358 )  
We applied variational iteration method to solve periodic boundary value problems. A correction function can be easily constructed by Lagrange multiplier which can be identified by variation theory. The initial approximation can be selected with unknown parameters which can be determined via boundary value conditions. Comparing the approximate with the exact solution of two concrete examples, we can find that the variation iteration method is convenient and efficient.
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Periodic Solutions for (2k)thOrder Nonlinear Delay Differential Equations
LIANG Xin,, ZHANG Shen xu
J4. 2008, 46 (03):  466-468. 
Abstract ( 1362 )   PDF (202KB) ( 297 )  
Applying Schauder fixedpoint theorem and Fourier’s method, we generalized the results on theexistence and uniqueness of the periodic solutions for a class of second order delay differential equations, and gave the existence and uniqueness of 2πperiodic solutions for (2k)thorder nonlinear delay differential equations on space L2(0,2π). The condition to ensure the theorems is a variety of usual Lazer type one.
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Homotopy Method for Getting a Local Minimum ofa Class of Nonconvex Programming
SUN Wenjuan, LIU Qinghuai, WANG Cailing
J4. 2008, 46 (03):  469-471. 
Abstract ( 1075 )   PDF (222KB) ( 306 )  
We used combined homotopy interior point method to solve the nonconvex programming problems of convex objective function. We proved that when the homotopy map is a regular map, the homotopy algorithm converges to a local minimum. We also proved that when the objective function is nonconvex, a local minimum point of the problem can also be obtained from the homotopy algorithm under the condition of regular homotopy map, if all K-K-T points of the nonconvex programming problem are on the bound of feasible region.
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Improvement on the Best Location Equivariant PredictionInterval under the Ordered Parameters
SHAN Guodong, MA Qiuhong, LI Fengxiang
J4. 2008, 46 (03):  472-474. 
Abstract ( 1143 )   PDF (160KB) ( 274 )  
his paper considers a statiscal prediction problem of random variable under the ordered parameters. An improvement on the best equivariant prediction interval is considered for the location family. An exampleis given.
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Mapping of Topological Chain Ergodicity
MENG Xin, GUAN Zhiqiang, LIU Guoqing
J4. 2008, 46 (03):  475-477. 
Abstract ( 873 )   PDF (194KB) ( 285 )  
By introducing the definition of chain ergodicity and its relationship with topological ergodicity, this paper proves that if topological ergodicity is fulfilled, the chain ergodicity will be fulfilled, too, while it’s not true conversely. Further, it is pointed out that the two properties of mapping which meet the demand of pseudoorbit tracing properties are equivalent. In addition, the present paper presents that if the power system squence is fulfilled, its generated converse limit system will be fulfilled, too, and it’s also true conversely and hence develops the corresponding theory of topological ergodicity.
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计算机科学
Hierarchical Task Network Based Conformant Planning
FENG Yuxuan, OUYANG Dantong
J4. 2008, 46 (03):  478-483. 
Abstract ( 1109 )   PDF (227KB) ( 296 )  
A new approach to solve conformant planning problem was proposed and proved. The algorithm has two terms, one is to conform all the pos sible worlds, the other is to direct the result of the first one to the goal state.
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A Distributed Command and Control Simulation System Framework Based on Design Pattern
LI Pan, LIU Shufen, ZHANG Xinjia
J4. 2008, 46 (03):  483-488. 
Abstract ( 1290 )   PDF (367KB) ( 305 )  
This paper deals with an application framework of command and control field based on the objectoriented design pattern, clarifies the vertical and horizontal relationship between layers in the framework, and the communication between layers through unified abstract interface reduces the level of coupling between layers. Practice shows that the establishment of the framework has a very important significance on improving software reuse, enhancing system scalability and maintainability, and other aspects.
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A User Gradebased Collaborative Filtering Recommendation Algorithm
GAO Ying, QI Hong, LIU Yabo, LIU Dayou
J4. 2008, 46 (03):  489-493. 
Abstract ( 1161 )   PDF (291KB) ( 316 )  
A user gradebased collaborative filtering recommendation algorithm is presented in this paper. It solves the scalability problem of traditional collaborative filtering algorithm. It defines a user grade function firstly, which determines users’ grade according to the number of their rating items, and by means of finding neighbors for a target user, it only considers the candidates in his near grade, so the efficiency increases. Both theory and experimental results show that this algorithm improves recommendation efficiency greatly compared with traditional collaborative filtering, and at the same time the recommendation quality does not decrease.
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Study on Interrupt Mechanism in the Linux 2.6 Kernel
ZANG Xuebai, ZHAO Yali, WANG Qiushi, ZHENG Kai, CHEN Peng, ZHAO Hong wei
J4. 2008, 46 (03):  494-498. 
Abstract ( 988 )   PDF (236KB) ( 285 )  
A realtime improvement scheme of Linux 2.6 kernel is proposed on the basis of the method of controlling execution time of interrupt, this scheme can resolve the problem of long response time caused by frequent interrupts in the execution process of Linux realtime tasks. By analyzing Linux 2.6 kernel interrupt mechanism as well as the interruption mechanism of the kernel branded Ingo Molar realtime kernel patch, and arranging an appropriate execution time for interrupt by comparing with the current tasks realtime priority, the task’s realtime res ponse was realized. Experimental results show that the interrupt response time of improvementscheme is shorter than that of the kernel with branded Ingo Molar realtime kernel patch.
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An Improved R-Link Spatial Data Index Algorithm
ZHAO Wei,, LI Wenhui, ZHANG Shu
J4. 2008, 46 (03):  499-503. 
Abstract ( 930 )   PDF (390KB) ( 308 )  
This paper presents a quick speed spatial indexing structure which is based on R-link tree. And we introduced K-Means algorithm into the structure. In K-Means algorithm, we adopted valuestandard deviation to ascertain the initial clustering centres to improve convergence speed and we ascertained ultimate K value by distance criterion function to make K value most suitable. The structure sometimes consumes more storage than R-Link but gains better performance. The more the data quantity, the better the overall performance of the structure.
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数学
Relational Extension Rule
WU Xia,, YU Haihong,, LI Zehai, LI He,, SUN Jiayu
J4. 2008, 46 (03):  504-508. 
Abstract ( 1391 )   PDF (210KB) ( 317 )  
The modal logics was translated into a firstorder fragment by relational encoding method at first. And then we used the firstorder extension rule prover to deal with the fragment. Namely, we presented a new reas oning method for modal logics. The proof of its soundness and completeness was given at last.
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计算机科学
Generalized CL-stability Algorithm for Recognition on Mislabeled and Abnormal Samples in Cancer Microarray
ZHOU You, ZHANG Chen, WU Chunguo, SHI Xiaohu, LIANG Yanchu
J4. 2008, 46 (03):  509-511. 
Abstract ( 1547 )   PDF (194KB) ( 251 )  
A generalized CL-stability algorithm proposed in this paper can be used to recognize mislabeled samples and abnormal samples in cancer microarray. The CL-stability is selected as a basic operator in the proposed a lgorithm. The mislabeled samples or abnormal samples are detected depending on the gobal stability of samples. Experimental results show that the generalized CL-stability algorithm is not only better than other existing algorithms, but also used to distinguish mislabeled samples and abnormal samples.
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OLAPRES: Based on OLAP Replica Selection Architecture
JIANG Jianhua,, XU Gaochao, ZHANG Jie
J4. 2008, 46 (03):  512-514. 
Abstract ( 1268 )   PDF (203KB) ( 250 )  
A replica selection architecture based on online analytical processing technique is proposed and called as OLAPRES; it makes it possible that a lot of replicas can be selected efficiently by the basic online analytical processing functions of data preprocessing and rapid retrieve; the workflow of replica selection in OLAPRES is depicted finally. Compared to other replica selection architectures, the architecture of OLAPRES has advantages of fastness, scalability and flexibility.
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物理
Temperature Character Analysis and Compensative Technique for Digital Auto Gain Compensative Microwave Radiometer
LUAN Hui, ZHAO Kai
J4. 2008, 46 (03):  515-519. 
Abstract ( 954 )   PDF (247KB) ( 270 )  
The fundament of digital auto gain compensative microwave radiometer, measurement error analysis, the temperature modification principle and technique were presented and compensative expressions for temperature change was regressed. 
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High\|pressure Synthesis of PbZr0.52Ti0.48O3
LI Shuang,, ZHANG Lin,, FU Cheng wei, XU Da peng,et al
J4. 2008, 46 (03):  520-523. 
Abstract ( 1288 )   PDF (336KB) ( 279 )  
The high-pressure synthesis of lead zirconate titanate (PbZr0.52Ti0.48O3 or PZT) ceramics was investigated with two kinds of precursors as raw materials. The XRD and Raman measurements show that with a mixture of PbO and ZrO2 and TiO2(in molar ratio of 1∶0.52∶0.48) as precursor, the three-phase mixture of PbTiO3, ZrO2and Pb can be obtained under 1.5 GPa and 3.6 GPa at 880~1 061 ℃. A few solid solutions of PZT are formed only at 880 ℃. The single phase PbZr0.52Ti0.48O3 can be synthesized from a mixture of PbO and B-state precursor Zr0.52Ti0.48O2 (in molar ratio of 1∶1) in a temperature range of 710~812 ℃ under 1.5 GPa without intermediate phase PbTiO3. The various temperature Raman spectra of the sample synthesized
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Monte\|Carlo Calculation of X\|ray Dose\|enhancement\|factor Nearby Copper-phthalocyanine Connected Two High Z Metal Interface
DONG Wen bin, ZHAO Guang yi, ZHAO Bao kui, ZHOU Yin hang, MA Yu gang
J4. 2008, 46 (03):  524-527. 
Abstract ( 1314 )   PDF (241KB) ( 273 )  
The dose-enhancement-factors of different structure Au-CuPc-Au were calculated by Monte-Carlo method. The results show the dose-enhancement-factors of Au-CuPc-Au are simailer to that of Au-CuPc, but it has larger dose-enhancement-factors than those of Au-CuPc. Under the circumstance (the thickness of CuPc is 2 μm), the dose-enhancement-factor of 4 μm gold is larger than that of 2 μm gold. Under the circumstance (the thickness of gold is 2 μm), the dose-enhancement-factor of 1 μm CuPc is larger than that of 2 μm CuPc.
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材料科学
Characterization and Synthesis of Graphitic Carbon Nitride Sheets Structure
LI Xue fei,, ZHANG Jian, SHEN Long hai,, CUI Qi liang, ZOU Guang tian
J4. 2008, 46 (03):  528-530. 
Abstract ( 2094 )   PDF (278KB) ( 555 )  
Graphitic carbon nitride (g-C3N4) sheets were synthesized via the pyrolysis of melamine at 1 000 K under vacuum. X-ray diffraction patterns strongly indicate that the synthesized carbon nitride was g-C3N4. Transmission electron microscopic images indicate that the product was mainly composed of graphitic carbon nitride sheets. The chemical bonding of the sample was investigated by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. 
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The Behavior of Crystalline Grain Growth in TiNi Shape Memory Alloy Thin Films
MENG Fan ling, LI Yong hua, LIU Chang sheng, XU Yue, WANG Yu ming
J4. 2008, 46 (03):  531-534. 
Abstract ( 1240 )   PDF (289KB) ( 331 )  
NiTi thin films were deposited on glass substrate by d.c. magnetron sputtering. X-ray diffraction (XRD) and small-angle X-ray scattering (SAXS) were used to study the behavior of crystalline grain growth in TiNi alloy thin films annealed at 500 ℃. The thin films were deposited at room temperature.
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Structural Characterization and Properties of Fe-N Alloy Prepared by Reaction between Fe and BN during Ball Milling
GUO Xiu zhi,, LIU Li, YAO Bin
J4. 2008, 46 (03):  535-538. 
Abstract ( 1264 )   PDF (304KB) ( 297 )  
With hexagonal BN (h-BN) as nitrogen source, an amorphous Fe-N alloy and ε-FexNalloy with hexagonal structure were prepared by mechanical milling of Fe and h-BN. The nitrogen content change was estimated in the ε-FexN alloy with milling time. We investigated the formation mechanisms and the law of structural transformation about the two kinds of alloys. Magnetic properties of the amorphous Fe-N alloy and ε-FexN alloy were described by Mossbauer patterns and magnetometer of vibration samples. The results show that the magnetic property of ε-FexN alloy changed from ferromagnetisium to paramagnetisium with N content increasing. The article elaborates on the law and mechanisms of the change of coercivity with boll milling time.
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化学
Synthesis and Properties of Polymer Transparent Resinswith High Refractive Index
YIN Jiumei, CHEN Xihong, ZHAO Dengfeng, LIN Quan
J4. 2008, 46 (03):  539-542. 
Abstract ( 1246 )   PDF (259KB) ( 262 )  
Benzene ring and sulphur groups were introduced into a compound containing C=C double bonds to prepare a novel monomer Sphenylthiomethacrylate (PTMA), the structure of which was characterized by 1H NMR, FTIR and HPLC. The new kinds of transparent polymeric resins were obtained through the copolymerization of PTMA and styrene. The copolymer resins possessed high refractive indexes with a good transparency. With the content of PTMA increasing, the refractive index of the copolymer resin was enhanced, and the impact resistance was improved.
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Effects of Pr Dopant on Structure andElectrical Properties of Ce0.87Sm0.13O2-δ
ZHOU Defeng,, LI Zhaohui, LI Lian gui, MENG Jian
J4. 2008, 46 (03):  543-547. 
Abstract ( 1318 )   PDF (512KB) ( 291 )  
Materials formulated Ce0.87Sm0.13-xPrxO2-δ(x=0.00, 0.01, 0.02) were prepared by solgel method. Structural and electrical properties of the materials were investigated by means of X-ray diffraction (XRD), Raman, X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM)and AC impedance spectroscopy. The effects of small amounts of Pr doping on microstructure and electrical conductivity of the material were discussed. The results show that the Pr doping could reduce or eliminatethe dents and pores on the grain surface and the grain boundary, which results in the lower electrode interface and grain boundary resistance. The relative density of the materials is increased remarkably. And the contribution of grain boundary resistance to the total resistance is reduced significantly.
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Influence of Organic Reagents on the Characteristics of Lower Power Argon Microwave Plasma Torch Atomic Emission Specta
WANG Shuhua,, ZHOU Jianguang, JIN Qinhan
J4. 2008, 46 (03):  548-552. 
Abstract ( 1101 )   PDF (276KB) ( 233 )  
The effects of organic reagents on the emission signals of element and plasma parameters (rotational temperature, excitation temperature and electron density) when they had been introduced in the lower power argon microwave plasma torch (ArMPTAES) were investigated. The discharge characteristics of plasma, especially excitation temperature, were evidently changed owing to the introduction of organic reagents. With the introduction of organic reagents studied, the spectral intensities of atomic emission lines were improved to some extent, but those of ion emission lines were obviously restrained.
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Determination of Sulfur Compounds in Light Hydrocarbon and Its Products by Gas Chromatography
DOU Yunqin, LI Xiao li, SONG Huimei, ZHANG Lichao, CAO Guoying,GU Xiaoqing, ZHANG Hanqi
J4. 2008, 46 (03):  552-555. 
Abstract ( 1157 )   PDF (236KB) ( 265 )  
The sulfur compounds in light hydrocarbon and its products were determined by gas chromatography with a flame photometric detector. The experimental conditions were examined and some types of standard curves were studied in detail. The determination limits of 2-propyl mercapan, 1-propyl merca pan and methyl thioether are 0.56,0.21 and 0.37 mg/L, respectively. The proposed method was applied to the determination of sulfur compounds in light hydrocarbon and its products and the results obtained are satisfactory.
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Synthesis of Antidiabetic Medicine Repaglinide
ZHAO Shuang, XU Zhibing, E Chenguang, LI Zhuo, WANG Ensi,
J4. 2008, 46 (03):  556-559. 
Abstract ( 1413 )   PDF (241KB) ( 391 )  
Repaglinide (a new antidiabetic medicine), (S)(+)-2-ethoxy-4-[N-[1-(2-piperidinophenyl)-3-methyl-1-butyl]aminocarbo nylmethyl]benzoic acid, was synthesized by means of Ph3P catalyzed condensation and LDA/DMPU catalyzed carboxylation as pivotal steps from the starting materials 4-methylsalicylic acid and 2-chlorobenzonitrile. Repaglinide was synthesized in a total yield of 10.5%. The structures of the targetmolecule and the key intermediates were confirmed by IR, 1H NMR,13C NMR, elemental analysis, specific rotation and MS techniques.
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环境科学
Influence Factors for the Degradation of Sodium mNitrobenzene Sulfonate by CWPO
ZHENG Shuang, DONG Guohua, WANG Jian, LIU Jianlin, LI Yu,
J4. 2008, 46 (03):  560-564. 
Abstract ( 1324 )   PDF (279KB) ( 217 )  
Degradation of sodium mnitrobenzene sulfonate was investigated by the catalytic wet peroxide oxidation (CWPO), and the removal effectiveness of the degradation were compared under conditions of different catalysts (Co/Bi, Mn/Ce, Cu/Mn/Ce, Cu(NO3)2, and activated carbon) and oxidants (peroxide and oxygen). Meanwhile, the effects of the reaction conditions, including reaction temperature, amounts of peroxide and catalyst, oxygen partial pressure and the initial concentration on the removal efficiencies were also discussed. The results show that sodium mnitrobenzene sulfonate was more efficiently decomposed by CWPO with Cu(NO3)2 as catalyst; the reaction temperature, am ounts of peroxide and sodium mnitrobenzene sulfonate have significant influence on the degradation reaction. Besides, the addition of oxygen and catalyst can enhancethe degradation efficiency. Otherwise, the temperatureincreasing process has important influence on the degradation of sodium mnitrobenzene sulfonate through CWPO.
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Effects of Interaction of Fluoridealuminum on the Adsorption Characteristics and Distribution of Aluminum in Tea Garden Soil
XIE Zhonglei, SUN Wentian, CHEN Zhuo, YIN Bo, WANG Jinghua
J4. 2008, 46 (03):  565-570. 
Abstract ( 1300 )   PDF (270KB) ( 194 )  
Effects of interaction of fluoridealuminum on adsorption characteristics and distribution of aluminum in tea garden soil were studied . With the elongation of the sorption time, decreasing in sorption rate and redu cing in sorption capacity for aluminum in the tea garden soil were obtained in the order: control>n(F)∶n(Al)=2>n(F)∶n(Al)=4>n(F)∶n(Al)=8, in the different ratios of fluoride to aluminum. The transformation rate of the active aluminum is lessened with the increase of sorption amount of aluminum in the tea garden soil while the active aluminum quantity increased obviously under the control and n(F) ∶n(Al)=2 ∶1. However, with the increase of the sorption amount of aluminum, the content of active aluminum decreased and the transformation rate of active aluminum further decreased in the presence of n(F)∶n(Al)=4 and n(F)∶n(Al)=8.
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Methods for Calculating Tourist Environmental Capacity
YU Hang, DONG Deming, YU Liansheng, CAI Yu
J4. 2008, 46 (03):  571-574. 
Abstract ( 1491 )   PDF (228KB) ( 231 )  
Currently the traditional methods of calculating tourism environment capacity have some drawbacks. With sustainable development as the target, the limitations of traditional formula in the real program have been poi nted out by analyzing the characteristics of traditional formula about tourism environmental capacity, on the basis of which the traditional formula was revised. The traditional formula and revised formula were contrasted, the applied range and rationality of revised formula were presented too.
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Adsorption Characteristics of Phenol by Organobentonite
KANG Chunli, TANG Xiaojian, CHU Xueqiu, GUO Ping, QUAN Fumin, WANG Zemin
J4. 2008, 46 (03):  575-577. 
Abstract ( 1187 )   PDF (241KB) ( 208 )  
The adsorption of phenol by organobentonite was researched. The effects of adsorption time, pH value and anionpositive ion on adsorption efficiency were examined. The test results indicated that organobentonite co uld effectively adsorb phenol. After modification treatment, the property of orga nobentonite was improved, and the capacities of adsorption and ionexchange were increased. The method of regeneration of organobentonite was good.
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