Based on the practice of urban mass transit construction , the author analyses some cost taches of investment control in the design phase : rational goal , scientific analysis of structure and procedure , appropriate method and measure , argues that timizing multifarious relations , shall be optimized and the pivotal tache be emphasized 摘要以国内城市轨道交通建设实践?背景，提出了设计阶段投资控制的几个重要环节：合理设置目标，科学分析结构与过程，选择合适的方法与措施，优化各种关系，突出控制重点。
Material recommend about the development and theory of dtc the composing of dtc - system is presented in this paper . some important taches such as flux - linkages adjuster , frequency adjuster , the mathematics model of asynchronous motor in - coordinates and the choice of voltage - vectors are discussed detailedly 文章对直接转矩控制方案的发展与理论做了具体介绍，根据理论确立了直接转矩控制系统的结构组成，并对其中如磁链调节、频率调节、在定子坐标系下的异步电动机数学模型、电压向量选择等重要环节作了详细讨论。
Chapter 3 expatiates the process of performance management . chapter 4 expatiates the implementation of performance management . in this chapter , i break down the implementation process of performance management into 12 taches , and micro - model of performance management implementation in second section is constructed by myself 第四章论述绩效管理的实施，构建了“绩效管理实施的微观模型” ，将绩效管理的实施过程细化为12个环节，并重点论述了其中3个环节：制定绩效评估的标准、确定绩效评估的方法、绩效评估者的选择与确定。
On downright transformation of the traditional managing ideas , patterns and measures , we can reforge enterprise operation flow , and integrate enterprise interior resources . with all this work , there can be a few taches , short distance , low cost , high efficiency and information accessible logistics system 彻底转变企业传统的经营观念、模式和手段，通过企业业务流程的再造，企业内部资源的整合，建立一个少环节、短距离、低成本、高效率、信息化的物流体系。
