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91.
A new-style remote monitoring system is propsed.which is based on enterprises‘ embedded wed servers and can be widely used in enterprises‘ networked manufactureing systems.The principle and characteristics of remote monitoring system based on embedded web server are analyzed.Such a kind of system for networked manufacturing is designed ,and it proves efficient and feasible in promoting communication among enterprises,improving designing and scheduling,decreasing facility failure and reducing product cost. 相似文献
92.
高新技术企业风险投资项目最佳组合及中止模型研究 总被引：2，自引：0，他引：2
深入分析了风险投资在高新技术企业中的作用及对风险投资项目进行中止决策的重要意义，提出了确定风险投资项目最佳中止比例及最佳数量三阶段数学模型，对正在中国兴起的风险投资作出决策有很大的现实意义和可操作性。 相似文献
93.
软件业是一个高投入、高风险、结果高度不确定的行当。信息化项目开发的成败与其说是技术问题,毋宁说是一个管理问题。从管理科学的发展看,一个基于项目的管理模式应运而生,并正在世界范围内蓬勃兴起。对中国软件业来说,我们的确需要有一个顶层设计,也就是说,中国软件业应该有一个发展战略、技术路径和优先发展重点方面的选择。 相似文献
94.
Geographic information systems(GIS)are a widely used tool in urban planning and management.More and more cities and deecision-makers require its attributes of promptness,precision and visualization.But the application of GIS in urban environmental management is still a new field and relevant researches are getting on tardily.As a subsystem of GIS,an urban environmental management geographic information system(UEMGIS0should be a complex multi-discipline and multi-objective tool to perform quantitative multi-dimension analysis and to transfer the results into an expression legible to an ordinary user.It should be a dynamic system of prompt functions based on upgradable databases,and be composed of many subsystems respectively specialized in items about water,air,waste and noise as well as relative standards and regulations.However, existing UEMGISs mostly rely on the basic GIS too much to design the actual requirements of applications and managements in themselves,and the unavailability of sufficient fundamental data has retarded their improvement.In the design of a UEMGIS,the standardization of data classification should be taken into consideration to make the data exchangeable and shareable among its subsystems and within every subsystemj,and the applicable error limits for input data should be defined in accordance with the user s required precision of data out.Data acquisition can be easy and quick if remote sensing,global positioning system(GPS)and other technologies are combined with GIS,Rapidly progressing information fechnologies have been giving a bright prospect for the melioration of UEMGIS that will have great potential and wide application in environmental conservation. 相似文献
95.
孔煜 《重庆大学学报(英文版)》2005,(3)
1 Introduction 1 As the manifestation of corporate investment decision, corporate investment behavior has been the focus of scholars and practitioners’ discussion. At present, empirical studies about corporate investment mainly focus on two broad issues. One of the two issues is the relationship between financing constraints and investment-cash flow sensitivity in incomplete market. For example, Fazzari, Hubbard and Petersen [1] found that there is significantly positive relationship betwee… 相似文献
96.
余瑛 《重庆大学学报(英文版)》2003,2(2)
1. Introduction Acidic fibroblast growth factor (aFGF), a member of a family of structurally related polypeptides, is a kind of multifunctional protein that can stimulate cellular proliferation, migration and differentiation. In vivo, aFGF displays angiogenic activity promoting vascular endothelial cell mitogenesis as well as chemotaxis and induction of proteases involved in tissue regeneration [1]. Due to this wide range of biological activities, many potential therapeutic usages of aFGF … 相似文献
97.
家庭教育在本质上是人类在家庭代际之间进行的生存方式的传递。其基于结构、动力的生物—文化属性,并凭借与生活一体的"示范"与"效仿"的核心机制以及言语教育方式为辅助机制实现传递,这是家庭教育机制的本质所在。在现代社会,家庭教育与学校教育机制有所分化,因此,需要建立起彼此的联系,在本质上还原教育的完整。 相似文献
98.
A new type of real-time holographic three-slit interferometer is presented.It uses a calcite polarized optical element to obtain objective light and reference light to record a hologram.Its remarkable feature is to use a beam of fixed slit diffracted light as the reference light to record the lateral slit diffracted wave front,and to use also the same diffracted light as the illuminating light to reconstruct the wave front.This insures the phase distribution of the reconstructed wave front against the influence by the small natural direction drift of the laser beam and also by the tiny external vibration.The stabillity,reliability and measuring accuracy of this apparatus are improved notably. 相似文献
99.
重庆市科学技术委员会 《西藏科技》2007,(Z1)
为贯彻落实第二次全国科技对口支援西藏工作座谈会精神,进一步加大科技对口支援西藏的力度,经协商,重庆市科委于2005年支持了西藏昌都微水发电试验示范项目,支持经费30万元.现将有关情况和下一步援藏工作初步打算汇报如下. 相似文献
100.
陆静平 《重庆大学学报(英文版)》2003,2(1)
1. Introduction Product data management (PDM) is a technology helping workgroup, department, division, or enterprise manage product data and development process throughout the product life cycle, from inception, through development and production to dispatch and beyond. As an integration tool connecting many different areas, PDM manages product data throughout the enterprise, ensuring that right information is available to the right person at the right time and in the right form. Web-based … 相似文献