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入侵检测技术研究

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沈阳工程学院学报（自然科学版） 2004年第2期6卷 38-39页

作者：黄莹陈笑辽宁大学辽宁沈阳110036

随着计算机网络和分布式计算机的普及和应用 ,网络安全正在变得越来越重要。入侵检测是网络安全防护的重要组成部分。文中主要介绍了入侵检测技术的基本原理及其现实意义。

关键词：入侵检测技术 IDS CIDF

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构建我国生态税收体系的路径选择——基于可持续发展视角

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山东财政学院学报 2011年第4期 11-16页

作者：刘普照辽宁大学经济学院辽宁沈阳110036

鉴于目前严峻的自然资源和环境污染状况,我国很有必要在短期内实行生态税制改革。但是考虑到我国的经济发展水平和税制的稳定性,我国的生态税制改革应循序渐进,分三阶段展开。第一阶段生态税制改革的任务是完善现行的生态税收政策,即在... 详细信息

鉴于目前严峻的自然资源和环境污染状况,我国很有必要在短期内实行生态税制改革。但是考虑到我国的经济发展水平和税制的稳定性,我国的生态税制改革应循序渐进,分三阶段展开。第一阶段生态税制改革的任务是完善现行的生态税收政策,即在保持现行税制框架稳定的基础上对一些政策细则进行调整。第二阶段实行排污费的彻底费转税改革,开征环境污染税。第三阶段引入碳税,充分借鉴OECD国家的税率制定、税收收入返还方式、税收优惠等政策经验,在实现二氧化碳减排目标的同时尽量降低碳税对国民经济和高能耗企业造成的冲击。

关键词：可持续发展生态税制环境污染税碳税

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Time-Delay Dependent Robust Passive Control for a Class of Nonlinear Time-Delay Systems

Time-Delay Dependent Robust Passive Control for a Class of N...

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第二十六届中国控制会议

作者： Yang Li1,2,Zhang Qingling1 1.Mathematical Department,Liaoning University,Shenyang 110036,P.R.China2.Institute of System Science,Northeastern University,Shenyang 110004,P.R.China

The time-delay dependent robust passive control problem for a class of time-delay systems with nonlinear perturbations is *** we establish the time-delay robust passive criterion for the systems by the matrix inequalities,and point out the bound of the *** we get the time-delay dependent robust passive state feedback *** last we testify the feasibility of the theorems by the numerical examples.

关键词： nonlinear perturbation time-delay system time-delay dependent robust passive

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国有权集中对中国工业绩效影响的实证分析

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上海财经大学学报 2004年第2期6卷 3-11页

作者：唐要家唐春晖辽宁大学工商管理学院辽宁沈阳110036 沈阳师范大学旅游学院辽宁沈阳110034

本文的实证分析表明 ,不同的国家所有权集中度对中国工业产业绩效有着重要的影响。国家所有权垄断是与较高的垄断利润和较低的生产效率紧密连在一起的。国家所有权垄断并不具有经济效率意义上的合理性。非国家所有权进入和带来的市场竞... 详细信息

本文的实证分析表明 ,不同的国家所有权集中度对中国工业产业绩效有着重要的影响。国家所有权垄断是与较高的垄断利润和较低的生产效率紧密连在一起的。国家所有权垄断并不具有经济效率意义上的合理性。非国家所有权进入和带来的市场竞争会明显促进产业经济效率的提高。因此 ,打破国家所有权垄断 ,降低非国家所有权的行业进入壁垒 ,创造不同所有权公平竞争的市场。

关键词：中国工业绩效实证分析产业集中度国家所有权产业绩效市场性垄断市场竞争国有产权

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Crystal Structure of Inclusion Compound trans-9,10-Dihydro-9,10-di（p-tolyl）-9,10-phenanthrenediol-benzene

Crystal Structure of Inclusion Compound trans-9,10-Dihydro-9...

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中国化学会第四届有机化学学术会议

作者： ZHU, Feng LIN, Yong-Cheng GUO, Wen-Sheng (Department of Chemistry & Chemical Engineering, Foshan University, Foshan 528000) ( School of Chemistry & Chemical Engineering, Zhongshan University, Guangzhou 510275) ( School of Chemical Science & Engineering, Liaoning University, Shenyang 110036)

＜正＞During the course of our study on inclusion compounds to clarify the relationship between host molecules and their inclusion abilities, we had reported a chelishape host class, In order to enlarge the cavity formed by host molecules, here we used the p-tolyl as the groups at C（9） and C（10）, and synthesized another chelishape host, frans-9,10-dihydro-9,10-di（p-tolyl）-9,10-phenanthrenediol （1）. Attempts to form the inclusion compound of 1·benzene were carried out by recrystalline of 1 from guest molecule benzene as solvent.

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Synthesis and structure of the gallium complex of K[Ga（Ⅲ）Cydta]·1.5H2O

Synthesis and structure of the gallium complex of K[Ga（Ⅲ）...

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第三届全国化学工程与生物化工年会

作者： Hong Xue, Jian Tong, Jun Wang, Zhang Xizan, Zhangfa Tong, School of Chemistry & Chemical Engineering, Guangxi University, Nanning, 530004, China School of Chemistry Science & Engineering, Liaoning University, Shenyang, 110036, China

＜正＞The gallium belongs to rare scare metal as same family with indium and it shown to have anticancer properties and have radioactive[2～3]. Recently, Y.Z. Shen reported that some organogallium complexes and their application in the electroluminescence materials[4～6]. Thus it is very important to study the structures of complexes with various ligands. The crystal and molecular structures of the K[Ga（Ⅲ）Cydta]·1.5H2O （cydta = trans-1,2-cydohexanediaminetetraacetic acid） complex has been determined by single-crystal X-ray structure analysis. The crystal of the K[Ga（Ⅲ）Cydta]·1.5H2O complex belongs to monoclinic crystal system and P2（1）/C space group. The crystal data are as follows: a = 1.6507（3）nm, b = 1.3150（2）nm, c =8.5208（13）nm, ? = 101.699（2）?, V= 1.8112（6）nm3, Z =4, M =478.15, Dc= 1.754g?cm-3, ? = 1.391mm-1 and F（000） = 980. The final R and wR values are 0.0297 and 0.0721 for 2648 [I＞2.0?（I）] reflections, and 0.0394 and 0.0777 for all 3198 unique reflections, respectively. Structure analysis shows that the GaⅢ ion in the K [Ga （Ⅲ） Cydta]·1.5H2O complex anion has a six-coordinate structure with distorted octahedron, in which the cydta as a hexadentate ligand coordinates to the central GaⅢ ion with two N atoms and four O atoms of carboxylic groups.

关键词： GaⅢ cydta (trans-1,2-cyclohexanediaminetetraacetic acid) complexes structures.

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Dynamics of Nonholonomic Systems from Variational Principles Embedded Variation Identity

Dynamics of Nonholonomic Systems from Variational Principles...

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第十二届全国非线性振动暨第九届全国非线性动力学和运动稳定性学术会议

作者： Yong-Xin Guo and Shi-Xing Liu Physics College, Liaoning University, Shenyang 110036, ChinaChang Liu Department of Applied Mechanics, Beijing Institute of Technology, Beijing 100081, China Department of Applied Mechanics, Beijing Institute of Technology, Beijing 100081, China

Nondeterminacy of dynamics, i.e., the nonholonomic or the vakonomic, fundamental variational principles, e.g. the Lagrange-d’Alembert or Hamiltonian, and variational operators, etc., of nonholonomic mechanical systems can be attributed to the non-uniqueness of ways how to realize nonholonomic constraints. Making use of a variation identity of nonholonomic constraints embedded into the Hamilton’s principle with the method of Lagrange undermined multipliers, three kinds of dynamics for the nonholonomic systems including the vakonomic and nonholonomic ones and a new one are obtained if the variation is respectively reduced to three conditional variations: vakonomic variation, Hlder’s variation and Suslov’s variation, defined by the identity. Therefore, different dynamics of nonholonomic systems can be derived from an integral variational principle, utilizing one way of embedding constraints into the principle, with different variations. It is verified that the similar embedding of the identity into the Lagrange-d’Alembert principle gives rise to the nonholonomic dynamics but fails to give the vakonomic one unless the constraints are integrable.

关键词： Nonholonomic systems variational principles variation identity Chetaev’s condi- tion vakonomic dynamics ideal constraints

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