This paper introduces current situation and developing of gnterprise resource planning ; analyzes the working principle , key technical , processing and how to integrate material management , sales and distribution , finance accounting models of crp ( sap r / 3 ) system that is very famous in the world . using computer system to process pp ( produce planning ) , mrp ( material requirement planning ) , sd ( sales and distribution ) , psc ( procurement and storage control ) , pcc ( produce cost checking ) , scm ( supply chain management control ) ; as a case study of implementation of xinhua book store ( head office ) , crp ( sap r / 3 ) system . as a designer and participator , the writer summarizes and points out some valuable information for business enterprise as a reference 本文阐述了企业资源规划的现状及发展原由；剖析了世界知名erp应用软件德国sapr 3的系统工作原理、关键技术、处理流程、以及如何将物流、信息流、资金流有效集成在一起，用计算机系统完成生产计划、物料需求规划、销售与分销、采购和库存控制、生产成本核算、供应链规划控制等；并将新华书店总店erp ( sapr 3 )项目的实施作为案例分析，通过对新华书店总店erp项目实施的亲身实践，总结并提出了企业在实施erp项目时值得注意与借鉴的地方。
The floating - point a / d conversion scheme was employed to increase the system ' s dynamic range . complex programmable logic device ( cpld ) was also used to perform the system ' s function such as data sampling trigger control and data storage control , etc . aduc812 , a new type of microprocessor with full a / d converter , was utilized to fulfill the a / d conversion 在数据采集电路设计中，采用了浮点放大技术来提高系统的动态范围；通过引入可编程逻辑器件来实现触发控制、存储控制；采样过程中应用了时序重叠技术，从而实现了数据采集系统的流水线作业方式。
