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Simple generalized restricted modules for graded Lie algebras of Cartan type

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Chinese Science Bulletin 1998年第16期43卷 1336-1340页

作者： SHU Bin Institute of Applied Mathematics & Physics, Shanghai maritime university, Shanghai 200135, china Institute of Applied Mathematics & Physics Shanghai Maritime University Shanghai China

Let %L=X(m:n) (2), X∈{W,S,H,K}% be a simple graded Lie algebra of Cartan type over a field %F% of characteristic p>3. With the aid of Farnsteiner’s generalized reduced Verma module, a connection between the simple G... 详细信息

关键词： Lie algebra of Cartan type generalized restricted module generalized reduced Verma module.

Laboratory air exposure can cause methyl siloxane contamination during sample treatment

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Laboratory air exposure can cause methyl siloxane contaminat...

持久性有机污染物论坛2012暨第七届持久性有机污染物全国学术研讨会

作者： Hongliang Jia 1 ,Zifeng Zhang 2 ,Wenjun Hong 1 ,Yi-fan Li 1,2* ( 1 International Joint Research Centre for Persistent Toxic Substances (ijrc-pts), dalian maritime university, dalian, 116026 2 ijrc-pts, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150049

*** Methyl siloxanes, which consist of a backbone of alternating silicon-oxygen (Si-O) units with methyl side attached to each silicon atom, are widely used in various products in our daily life. Studies have

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高强箍筋约束高强混凝土柱抗震性能研究综述

土木工程学报 2009年第4期42卷 1-9页

作者：司炳君孙治国王东升王清湘大连理工大学辽宁大连116024 大连海事大学辽宁大连116026

强烈地震作用下，高强箍筋对保证高强混凝土柱的抗震能力具有重要意义。为研究高强箍筋约束高强混凝土柱的抗震性能，对国内外进行的混凝土抗压强度在40～112MPa、箍筋屈服强度在400～1569MPa的混凝土柱的抗震拟静力试验结果进行广泛总... 详细信息

强烈地震作用下，高强箍筋对保证高强混凝土柱的抗震能力具有重要意义。为研究高强箍筋约束高强混凝土柱的抗震性能，对国内外进行的混凝土抗压强度在40～112MPa、箍筋屈服强度在400～1569MPa的混凝土柱的抗震拟静力试验结果进行广泛总结，发现基于普通强度混凝土得出的钢筋混凝土柱压弯构件的矩形应力图、抗剪承载力及塑性铰区约束箍筋用量计算公式并不适用于高强箍筋约束的高强混凝土柱，对此应进行修正。对高强混凝土柱的延性抗震能力，一个基本结论为，对于承受较高轴压的高强混凝土柱，通过合理配置高强箍筋，是可以充分保证其延性和耗能能力的；而对于承受较低轴压的高强混凝土柱，只要箍筋间距满足要求，使用高强箍筋一般能保证其延性抗震性能。

关键词：高强混凝土柱高强箍筋抗震性能延性综述

Polychlorinated Biphenyls in Global Air and Soil:New concept for fractionation effect

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Polychlorinated Biphenyls in Global Air and Soil:New concept...

持久性有机污染物论坛2008暨第三届持久性有机污染物全国学术研讨会

作者： Yi-Fan Li~(1,2) Liyan Liu~2 Zhi Zhang~(2,3) Hongliang Jia~3 Tom Harner~1 Ed Sverko~(1,4) (1 Science and Technology Branch,Environment Canada 2 International Joint Research Center for Persistent Toxic Substances (ijrc-pts),State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,china 3 ijrc-pts,dalian maritime university,dalian,china 4 RC-pts,McMaster university,Hamilton,Canada

*** Rappe suggested deposition of pesticides is enhanced by cold *** pointed out in 1973(1) that after used in warm climates,pesticides will evaporated and transported to cool areas where they will be condensed,and re...

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Monitoring the concentration of N_2O in the Fildes Peninsula, maritime Antarctica

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Chinese Science Bulletin 2000年第21期45卷 2000-2004页

作者： SUN Liguang, XIE Zhouqing, ZHAO Junlin, XING Guangxi, SHI Shulian & Du LijuanInstitute of Polar Environment, university of Science and Technology of china, Hefei 230026, china Institute of Environmental Science, Beijing Normal university, Beijing 100875, china Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 2 10008, china Institute of Polar Environment University of Science and Technology of China Hefei China Institute of Environmental Science Beijing Normal University Beijing China Laboratory of Material Cycling in Pedosphere Institute of Soil Science Chinese Academy of Sciences Nanjing China

Gases in the marine boundary layer in Fildes Peninsula, maritime Antarctica were sampled and analyzed for the first time. Sampling sites included areas covered by moss and lichen growth, penguin colonies and an area where scientific research stations are located. A total of 211 samples were analyzed for N2O concentrations, with an average of (321.33±3.07) nL/L. This is above the global average value of 314 nL/L. It is found that the N2O concentrations evidently increase during the summer months. Concentrations around the research stations are higher than at remote areas, indicating a potential source from human activities on the island. N2O concentrations at a large penguin colony on Barton Peninsula are the highest among the sampled areas. This may explain why N2O concentrations in Fildes Peninsula are higher than the global average. Our preliminary conclusions are that human activities and emissions from penguin dropping-amended soil and vegetation soil constitute the major sources of N2O in the

关键词： Antarctica Fildes Peninsula N2O soil penguin dropping.

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船舶减摇鳍模糊控制器的系统化设计与仿真

系统仿真学报 2004年第4期16卷 621-624页

作者：修智宏任光大连海事大学轮机工程学院海军大连舰艇学院指控信息系大连116018

建立了船舶减摇鳍控制系统数学模型,提出了一种模糊规则后件采用PID表达式的TS-PID模糊控制器模型,并推导出了输入采用正规模糊集、三角形全交迭隶属度函数时该模糊控制器的插值表达式,为实际应用提供了一种快速精确的控制算法。在此基... 详细信息

建立了船舶减摇鳍控制系统数学模型,提出了一种模糊规则后件采用PID表达式的TS-PID模糊控制器模型,并推导出了输入采用正规模糊集、三角形全交迭隶属度函数时该模糊控制器的插值表达式,为实际应用提供了一种快速精确的控制算法。在此基础上,应用钝性定理研究获得了减摇鳍TS-PID模糊控制器闭环系统IO稳定的充分条件,并探讨了利用遗传算法进行优化设计的方法。最后通过计算机仿真,验证了减摇鳍TS-PID模糊控制器的优越性。

关键词：模糊控制系统化设计减摇鳍仿真稳定性

Gabor Filter Optimization Design for Iris Texture Analysis

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Journal of Bionic Engineering 2004年第1期1卷 72-78页

作者： Tao Xu 1, Xing Ming 2, Xiaoguang Yang 3 1.College of Mechanical Science and Engineering, Jilin university, Changchun 130022, P.R.china 2.College of Computer Science and Technology, Jilin university, Changchun 130022, P.R.china 3.Dept of Mathematics and Physics, dalian maritime university, dalian 116026,P.R.china Jilin university Jilin university dalian maritime university

This paper deals with an optimization design method for the Gabor filters based on the analysis of an iris texture model. By means of analyzing the properties of an iris texture image, the energy distribution regularity of the iris texture image measured by the average power spectrum density is exploited, and the theoretical ranges of the efficient valued frequency and orientation parameters can also be deduced. The analysis shows that the energy distribution of the iris texture is generally centralized around lower frequencies in the spatial frequency domain. Accordingly, an iterative algorithm is designed to optimize the Gabor parameter field. The experimental results indicate the validity of the theory and efficiency of the algorithm.

关键词： iris recognition texture analysis receptive profile Gabor filter parameter field optimization method

Air-Soil Exchange of Endosulfan in china

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Air-Soil Exchange of Endosulfan in China

持久性有机污染物论坛2011暨第六届持久性有机污染物全国学术研讨会

作者： Hongliang Jia~1,Zhi Zhang~2,Meng Yang~1,Yi-Fan Li~(3,1,2*) (1 International Joint Research Center for Persistent Toxic Substances(ijrc-pts),dalian maritime university,dalian,P.R.china 2 ijrc-pts,State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,P.R.china 3 Science and Technology Branch, Environment Canada,Toronto,Canada

*** Endosulfan has become a global challenge,due to its long-term usage and its properties of persistent organic pollutants(POPs).Endosulfan has been applied in china to control pests in cotton since 1994,and in wheat,tea,tobacco,apple and other fruits since *** total usage of endosulfan in china was estimated to be approximately 25,700 t between 1994 and *** first Chinese gridded inventories of usage,emissions to air,and residues in soil inventories with a 1/4°longitude by 1/6°latitude resolution forα-,β-endosulfan and endosulfan sulfate were produced for ***

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The Semi-join Query Optimization in Distributed Database System

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The Semi-join Query Optimization in Distributed Database Sys...

2012 National Conference on Information Technology and Computer Science

作者： Lin Zhou Transportation Management College dalian maritime university dalian,china Yan Chen Transportation Management College dalian maritime university dalian,chinaTaoying Li Transportation Management College dalian maritime university dalian,china Yingying Yu Transportation Management College dalian maritime university dalian,china

In distributed database system,the distributed deposition and redundancy data brought convenient to fault recovery,but they make distributed query processing more complicated at the same *** optimization and processing is one of the key technologies in distributed database *** generally uses semi-join operation to improve the time response performance of query and reduce communication *** paper briefly described the corresponding concepts and characteristics of distributed database system,summarized the goals of distributed database query optimization,and analyzed the query optimization process based on semi-join operation combined with the practical *** addition,it introduced a classical algorithm which is used for multiple connection and query optimization based on the semi-join query optimization,the SDD-1 algorithm.

关键词： distributed database semi-join operation query optimization