The Action of Electromagnetic Force and the Generation of Electromagnetic Torque

旋转电机中电磁转矩的产生，可以从作用在磁场内磁性物质单位体积上的电磁力出发加以说明。考虑到电机转子的实际结构，电磁力除作用在转子绕组上之外，更主要的是作用在转子铁心的表面和内部。为此，对常见结构形式的转子上电磁转矩的产生原理给出了定性、直观的说明。     

一种新型高速数字锁相环的研究

本文针对传统方法实现的数字锁相环(DPLL)工作速率低的问题,通过对一种典型的DPLL的分析,找出影响其工作速率的主要因素,研究并提出了一种全新的高速实现方法,并在实验室进行了数据传输位同步提取实验。     

重要性概念在审计中的运用

在有限的审计时间内，审计人员针对被审计单位繁多的财务信息资料，必须确定其审计重点。在确定审计重点时，应遵循重要性原则，以提高审计的质量和效率。     

中国石化集团公司面向新世纪的发展战略

面对“入世”后的严峻挑战，中国石化集团公司将全方位实施资源、投资、营销和科技人才战略。在新世纪开始的5－10年，中国石化将跟踪世界石油、石化发展趋势，以结构调整为主线，以提高竞争力的核心，通过改革开放、结构调整、技术创新、规范市场，推动产业升级。一是充分把握石油勘探开发高风险、高技术、高投入、高回报的特点，挖掘中国石化上游业务的巨大潜能，加强老区和西部新区的开发，加快与中海油合作的东海开发，进一步巩固和加强上游业务的基础性地位。二是加大结构调整力度，提升炼油，发展乙烯。到2005年，炼油综合加工能力达到5400万吨，乙烯生产能力达到550万吨。三是改革营销方式，扩大零售，发展配送，增强市场控制力。到2005年，加油站总数达到3万座，其中自有加油站2．8万座，建成并完善两级配送网络；销售量达到9000万吨，在中国石化主要市场内的零售市场占有率达到75％以上。     

浅论策划的营销

营销促进了策划,策划自身也需要营销.科学的策划营销应从搜寻并争取策划项目到客情维护全过程进行规划、安排,并处理好策划过程所涉及到的相关关系.     

Wage and Price Inflation in Poland in the Period of Transition: The Cointegration Analysis

The paper focuses on the long run relationships between wages, prices and labour productivity in the Polish economy by applying recent developments in the field of multivariate cointegration analysis. We followed modeling strategy which is suggested by Greenslade et al. (1999) and present all stages of the analysis which leads to the fully economically identified system of equations representing long run relationships. The investigation is based on the quarterly data from 1992.1 to 1999.2 which covers the period of transition of the Polish economy from the centrally planned system towards the market one. Basing on the empirical results we can argue that wages (costs) were one of the main forces driving inflation in Poland during that period. Also labor productivity proved to be stimulated by the increase of the real wages. On the other hand the hypothesis concerning the relationship between wages and unemployment was rejected by the data.     

虚拟设备驱动程序的开发设计

深入分析了 Windows9x的虚拟机环境 ,Vx D技术的文件结构及其消息处理 ,介绍了 Vx D常用开发工具。最后给出了一个 Vx D例程     

Optimal Patent Protection in a Two-Sector Economy

This article addresses the issue of optimal patent protection in an economy with a downstream and an upstream sector. The key insight is that higher patent protection in the downstream sector raises the incentives of agents to do R&D in that sector but discourages innovation in the upstream sector because of a market size effect. Hence, higher patent protection in the upstream sector accelerates growth whereas higher patent protection in the downstream sector slows it down. If some innovation is socially desirable, optimal patent protection is necessarily higher in the upstream than in the downstream sector.