检索结果-南通市图书馆

从亚马逊网上书店的服务特征看中国网络图书馆的构建设想

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图书情报工作 2001年第6期45卷 72-74页

作者：刘杰辽宁工程技术大学图书馆阜新123000

在简要介绍亚马逊网上书店服务特征的基础上,提出构建中国网络图书馆的设想。

关键词：亚马逊网上书店服务特征网络图书馆选书服务检索服务图书馆协作网络联机编目系统

An Improved Interior Algorithm for Quadratic Programs

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An Improved Interior Algorithm for Quadratic Programs

Basic equations of channel model for underground coal gasification

第十一届中国青年信息与管理学者大会

作者： Guiying Sheng,Leifu Gao Institute of Mathematics and Systems Science,liaoning Technical University,liaoning,fuxin,123000

本文提出了求解凸二次规划问题的新算法,此算法把对数罚函数法和拟牛顿算法有效的结合得到一种新的算法,即首先利用对数罚函数法和增广Lagrange函数将该约束问题转化为无约束问题,采用Wolf-Powell线搜索确定步长,利用拟Newton算法求最优... 详细信息

本文提出了求解凸二次规划问题的新算法,此算法把对数罚函数法和拟牛顿算法有效的结合得到一种新的算法,即首先利用对数罚函数法和增广Lagrange函数将该约束问题转化为无约束问题,采用Wolf-Powell线搜索确定步长,利用拟Newton算法求最优解,并给出数值检验结果,表明算法是可行并有效的。

关键词：凸二次规划对数罚函数拟牛顿算法 Wolf-Powell线搜索

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Progress in Natural Science:Materials International 2002年第5期 46-49页

作者： ZHANG Yongli, ZHANG Mengtao and SONG Weiyuan(liaoning Technical University, fuxin 123000, China) liaoning Technical University Fuxin 123000 China

The underground coal gasification has advantages of zero rubbish, nonpollution, low cost and high safety. According to the characteristics of the gasification, the channel model of chemical fluid mechanics is used to set up the fluid equations and chemical equations by some reasonable suppositions in this paper, which lays a theoretical foundation on requirements of fluid movement rules in the process of underground coal gasification.

关键词： underground coal gasification channel model gasification area constituent diffusion.

Analysis on weak area of urban concrete bridge

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Analysis on weak area of urban concrete bridge

2011 World Congress on Engineering and Technology(CET 2011)

作者： YANG Xiaoming College of Civil Engineering and Architecture liaoning Technical University fuxin China SHI Dan College of Civil Engineering and Architecture liaoning Technical University fuxin China

The urban concrete bridge including viaduct and overpass play a very important role in urban transportation system with the continuous development of cities. However, these bridges are inevitably injured by environmental erosion and increase of traffic flow, even leading to bridge’s collapse. In this paper, the concept of weak area in existing bridge is proposed based on all kinds of damage in urban concrete bridge and these damage evolutions. The weak area is the component or the location in a certain component in which the failure occurs firstly under the effect of environmental erosion, material deterioration and load variation. The method to find the weak area in existing bridge should be to compare the load carrying capacity and load effect of every component and choose that component in which the load effect is closest to the load carrying capacity. Finally, some technical problems to be solved for the analysis of weak area are summarized.

关键词： concrete bridge weak area damage load carrying capacity load effect

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一种新型结构的单极直流电动机的研究

微特电机 1998年第5期26卷 18-21,43页

作者：迟岩辽宁工程技术大学

根据单极电机的工作原理及特点，设计出一种新型结构的单极直流电动机。并根据实际运行的要求，设计了一种典型的控制系统，使这种单极直流电动机既具有普通直流电动机的良好工作特性，又具有传统单极直流电机无换向器等优点，为直流电... 详细信息

根据单极电机的工作原理及特点，设计出一种新型结构的单极直流电动机。并根据实际运行的要求，设计了一种典型的控制系统，使这种单极直流电动机既具有普通直流电动机的良好工作特性，又具有传统单极直流电机无换向器等优点，为直流电机的发展开辟一条新途径。

关键词：结构设计 GTO脉冲调速单极电机

Static filtering and collocation in successive steps for measurements with colored noises

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中国有色金属学会会刊：英文版 2005年第S1期15卷 80-81页

作者： ZHAO Chang-sheng~1, MA Zhen-li~2 (1. Xuzhou Normal University, Xuzhou 221009, China 2. liaoning Technical University, fuxin 123000, China) Xuzhou Normal Univ Xuzhou 221009 Peoples R China liaoning Tech Univ Fuxing 123000 Peoples R China

The theory of static filtering in successive steps with colored noises is ample scope for its application in the procedure of GPS data processing. A majority of error and round-cycle distinctness in the measurements of GPS carrier phase can be eliminated through three times of differential calculations of stations, satellites and epochs, in which the cycle beatings became isolated values. The observation error of three-differentials in the intervals between epochs results in block diagonal matrixes in the covariance matrixes, so that the desired matrixes occupy too large memory and the processing time is too long. Therefore, by using the theory of static filtering in successive steps with colored noises, the interrelation can be eliminated and can save the processing time and memory.

关键词： colored noise static filtering in successive steps three-differentials measurements in GPS carrier phase

The researches of GPS/GSM supervise and control system of vehicle

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微计算机信息 2003年第9期 46-48页

作者： Ji,Changpeng Bao,Jian Liu,Jianhui (liaoning Technical University,fuxin,123000,P.R.China) liaoning Technical University Fuxin 123000 P. R. China

the treatise introduced the GPS supervision and con-trol system,analyzed the features of the VHF/UHF single chan-nel call web,composite groups mobile communication web which are regularity used in current supervision and control system of vehicle,and several traffics that the GSM provided,thereby brought forward the project of utilizing GSM-short message to accomplish the GPS supervision and control system of vehicle of the ore deposit of yuanbaoshan,designed the system structure and the method of organizing web,put emphasis on how the GSM-short message technology was used in the supervise and control system,including system constitution,channel using mode,calling mode,synchrony’ s mode,data transmitted mode,etc.

关键词： GPS GSM-short message supervision and con-trol system of vehicle

Application and Research of GeoXH Handset in the Checking of Arable Dynamic Balance

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Application and Research of GeoXH Handset in the Checking of...

Coordination and evolution mechanism of fractal crack network in mining rock mass destruction

第二届中国卫星导航学术年会

作者： Wang Peixian~1,Zhang Guihao~1,Zhao Li~1 1.liaoning Technical University,fuxin,liaoning,China,123000

＜正＞The arable dynamic balance is a system of basic farmland protection in new《Land Management Law》.The traditional method is based on present situation map and completion drawing that were completed in paper maps and so on,using conventional tools complete land of dynamic balance review,With positioning difficult,measurement difficult,record difficulty disadvantages and inner calculation is not easy,*** on the theory of H-Star technology of Trimble GeoXH handset and concrete work practice in liaoning province,the paper describes the application of the Trimble GeoXH handset and procedure into the process of dynamic balance projects in liaoning *** sophistication of H-Star technical makes the use of Trimble GeoXH handset in dynamic balance has significant advantages:Easy to carry and Field operation simple make field personnel can get high precision positioning in a very short time,reducing labor intensity, shorting field work time,obviously improving the efficiency of field work;According to actual conditions,we evaluate the positioning accuracy of Trimble GeoXH handset,It’s far to meet the requirements of surveying technology in the checking of dynamic balance of arable;Using written calculation procedure greatly improves the computational efficiency of office work,operation time greatly curtailed In office *** using of both make dynamic balance project greatly improved efficiency of office work and field work,Not only meet the requirements of surveying technology in checking of dynamic balance,But also for formulating unified《surveying standard in the checking of arable dynamic balance》provide a reference.

关键词： Trimble GeoXH handset H-Star technology procedures dynamic balance efficiency

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中国有色金属学会会刊：英文版 2005年第S1期15卷 105-107页

作者： YU Guang-ming~1, ZHANG Chun-hui~2 (1. Qingdao Institute of Architecture and Engineering, Qingdao 266033, China 2. liaoning Technical University, fuxin 123000, China) Qinghai Inst Architecture & Engn Qingdao 266033 Peoples R China liaoning Tech Univ Fuxing 123000 Peoples R China

Based on the natural characters of stratum, complicated geological mining conditions and the essence of mining rock mass destruction, the complexity of rock mass destruction caused by miningw as analyzed. The inner link between rock mass destruction phenomena caused by mining and nonlinear science was revealed. There are numerous cracks in natural rock mass. The cracks’ distribution is irregular and is of statistical fractal structure. Self-organizational nonlinear evolution of the inner structure flaws leads to the rock mass destruction with external force. The evolution includes single fault’s fractal development, formation and evolution of fractal crack network and coordination of fractal crack network, etc. The law of fractal crack network’s evolution was introduced, at the same time, the coordination of fractal crack network was analyzed. Finally, based on coordination the principal equation of mining-caused subsidence of structural rock mass was established and its steady-state solution and unsteady-state solution were found.

关键词： the complexity of rock mass destruction fractal crack network coordination