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Chemical Research in Chinese Universities 1995年第4期11卷 284-290页

作者： SUN Chang-qing LUAN Chai-xia YANG Xu GAO Qian and XU Hong-ding(Department of Chemistry,jilin university, Changchu,130023)DU Wen-yuan(The National Lab.of Enzyme Engineering,jilin university, Chanchun, Chanchun,130023) jilin UNIV DEPT CHEMCHANGCHUN 130023PEOPLES R CHINA jilin UNIV NATL LAB ENZYME ENGNCHANGCHUN 130023PEOPLES R CHINA

hydrogen peroxide electrode with 1,1'-dimethylferrocene(DMFc)used as an electron transfer mediator has been *** Nafion, DMFc was modified on a glassy carbon electrode(GCE)surface,and horseradish peroxidase(HRP)was then immobiliged on the DMFc-Nafion film,forming a HRp-DMFc-Nafion modi- fied electrode. The chracteristics of the sensor has been shown by cyclic voltam- metry and constant potential measurements,The sensor responds fastly to hydro- gen peroxide,the time required to reach 95%of the steady-state current is less than 50s. The sensor displays a sensitive catalytic current response to hydrogen peroxide and can be operated at a potential range in which the oxidation of common interfering species,such as ascorbic acid and uric acid,does not occur. The sensor is stable for 20 days and its detection limit is 1 μmol/L.

关键词： Dimethylferrocene,Nafion,Sensors,Amperometry Hydrogen peroxide

DYNAMIC OPTIMIZATION FOR UNCERTAIN STRUCTURES USING INTERVAL METHOD

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Acta Mechanica Solida Sinica 2003年第2期16卷 141-146页

作者： Chen Suhuan Wu Jie Liu Chun (Department of Mechanics,jilin university,Changchun 130025,China) Department of Mechanics Jilin University Changchun 130025 China

An interval optimization method for the dynamic response of structures with inter- val parameters is *** matrices of structures with interval parameters are ***- bining the interval extension with the perturbation,the method for interval dynamic response analysis is *** interval optimization problem is transformed into a corresponding de- terministic *** the mean values and the uncertainties of the interval parameters can be elected design variables,more information of the optimization results can be obtained by the present method than that obtained by the deterministic *** present method is implemented for a truss *** numerical results show that the method is effective.

关键词： interval optimization interval parameter structure interval extension of function dynamic interval response

ESR Projection Profile Imaging

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Chemical Research in Chinese Universities 1991年第4期7卷 221-226页

作者： Shen Erzhong (Institute of Theoretical Chemistry, jilin university, Changchun)Zheng Yingguang (Analytical Measurement Center of jilin university, Changchun)

In the present paper we report an ESR imaging algorithm and program based on the projection profile technique, by which the stereograrns and their cross-sectional contour maps of sample spin density can be plotted. As an example, we give some figures in order to demonstrate the applicability and reliability of the program. Keywords ESR imaging, Projection profile principle, Sampling process, Smooth surface, Function reconstruction, Stereogram

关键词： ESR Projection Profile Imaging maps

THE RELATION BETWEEN THE DIMENSIONS OF BOUNDARY AND PHASE BOUNDARY IN ISOBARIC PHASE DIAGRAMS

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Science in China,Ser.B 1985年第5期28卷 457-463页

作者：赵慕愚范小宝 Departmnent of Chemistry jilin university Changchun Department of Electronics Science

The relation between the dimensions of boundary and phase boundary in isobaric phase diagrams has been proved theoretically in this paper.

关键词： THE RELATION BETWEEN THE DIMENSIONS OF BOUNDARY AND PHASE BOUNDARY IN ISOBARIC PHASE DIAGRAMS

NUMERICAL METHOD FOR PREDICTION OF NET-SHAPED BLANK IN MULTI-POINT FORMING OF SHEET METAL

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Chinese Journal of Mechanical Engineering 2002年第4期15卷 314-318页

作者： Cai Zhongyi Li Mingzhe Cui Xiangji Roll Forging Institute, jilin university, Changchun 130025, China Roll Forging Institute Jilin University Changchun 130025

A new numerical method to predict the initial blank geometry from the desiredobjective shape of parts is presented. Based on the conditions that the deformations in materialare most evenly distributed and that the volume remains constant, a positive definite functional forblank design is constructed. The functional is minimized by an iterative scheme of finite element,and then the optimal initial configuration is obtained. The method is easy and expedient to use. Theresults of numerical simulation of forming process and multi-point forming experiments for sheetmetal demonstrate that good precision is achieved by the proposed method.

关键词： sheet metal blank design finite element

STEERING SAFETY EVALUATION OF DRIVER VEHICLE CLOSED LOOP SYSTEM WITH RANDOM ROAD INPUT

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Chinese Journal of Mechanical Engineering 1999年第4期12卷 282-287页

作者： Zhao Youqun Shandong Institute of Technology Guo Konghui Zhang Guiyu jilin university of Technology Shandong Institute of Technology 山东工程学院汽车工程系山东淄博 255012 吉林工业大学汽车动态模拟国家重点实验室吉林长春山东工程学院山东淄博

The response simulation is studied and the steering safety is evaluated by using finer integration method for driver vehicle closed loop system with stationary random road *** algorithm not only is precise, but also can shorten the evaluation period of steering safety and reduce the tremendous cost for real vehicle *** response simulation and the vehicle steering safety evaluation are also studied for the closed loop system with evolutionary random road *** study can more truly evaluate vehicle driving for including the slowly varying of vehicle velocity with time.

关键词： Closed loop system Evaluation Random Safety Vehicle steer ability

Selection of Trypsin Inhibitors in Phage Peptide Library Using Model Pepeide Mimicking the Active Site of Trypsin

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Chemical Research in Chinese Universities 1996年第1期12卷 111-113页

作者： QI Jie FANG Rui LU Zhi-bin ZHou Hui LI Wei and SHEN Jia-cong(Department of Molecular Biology, jilin university, Changchun 130023, China)(Department of Chemistry, jilin university) jilin UNIV DEPT BIOL MOLECCHANGCHUN 130023PEOPLES R CHINA

The effects of alkali metal(Na+,K+) on the exchange degree of Hβ zeolite and the catalytic properties of the alkalized zeolites

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Chinese Journal of Chemistry 1995年第2期13卷 124-130页

作者： SHEN, Jian-Ping MA, Jun SUN, Tie JIANG, Da-ZhenDepartment of Chemistry, jilin university, Changchun, jilin 130023, ChinaMIN, En-ZeResearch Institute of Petroleum Processing, Beijing 100083, China Department of Chemistry Jilin University Changchun Jilin 130023 China Research Institute of Petroleum Processing Beijing 100083 China

The effects of alkali metals (Na+,K+) on the exchange degree of Hβ zeolite under different conditions and the conversion of α(or β)-methylnaphthalene over the alkalized zeolites were studied. The results showed that the H+ of Hβ zeolite is totally replaced by the Na+ of NaCl solution, while partially exchanged by the K+ of KC1 solution, there is an exchange equilibrium between the H+ and K+ for Hβ zeolite (Si/Al=17.23) and the value of equilibrium is 88.39. The exchange degree also increases with increasing the Si/Al of the samples. It was suggested that these resluts are attributed to the electrostatic field in the pore of Hβ zeolite and the nature of zeolite and the properties of alkali metal. The isomerization of α(or β)-methylnaphthalene is the main reaction over the samples and it is more favour on the proper acid-base sites of KHβ zeolite.

关键词： HB zeolite alkali metal exchange methylnaphthalene isomerization.

Molecular biological analysis of remains from Jiangjungou Cemetery in Inner Mongolia

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Progress in Natural Science:Materials International 2006年第7期16卷 727-731页

作者： WANG Haijing, LIU Weiqiang, FU Yuqin, ZHANG Xiaolei, ZHOU Hui and ZHU Hong ( Research Center for Chinese Frontier Archaeology of jilin university, Changchun 130012, China College of Chemistry, jilin university, Changchun 130023, China College of Life Science, jilin university, Changchun 130023, China) jilin Univ Res Ctr Chinese Frontier Archaeol Changchun 130012 Peoples R China jilin Univ Coll Life Sci Changchun 130023 Peoples R China jilin Univ Coll Chem Changchun 130023 Peoples R China

The 364-bp nucleotide sequence in hypervariable region I (HVRI) of mitochondrial DNA is successfully amplified from 9 out of 11 individuals of an ancient population buried in the Jiangjungou Cemetery in Inner Mongolia dated back to the Warring States Period in China. Nine fragments with different variations are obtained. A phylogenetic tree and a multidimensional scaling (MDS) plot are constructed using mtDNA sequences from the ancient population and several modern Asian populations. The results show that ancient population shares a closer genetic relationship with East Asian populations than with North and Central Asian populations. The genetic and historical evidence raise the possibility that the population might be the immigrants from Zhongyuan area, sent by the King Wuling of Zhao State to guard the nation against the attack from Huns.

关键词： mtDNA genetic relationship ancient DNA population.

New advances for cast iron welding in China in last decade

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China Welding 1995年第2期4卷 81-88页

作者： Sun Daqian Ren Zhenan and Zhou Zhenfeng(jilin university of Technology. Changchun)

In this paper. the research activities in the field cast iron welding in China in China in last decade are introduced. Investigations related to hot cracking and cold cracking of cast iron welding are reviewed Develop... 详细信息

关键词： advances. cast iron. cracking. welding. Consumables