有线电视系统工程的招标

针对有线电视系统工程建设的特点，依照《招标投标法》的规定和程序，对有线电视系统工程招标的种类、招标方式、招标工程必备的条件、标底的编制及审定、开标、评标和中标的原则进行详细介绍，对招标文件的编制进行具体说明。     

人工智能的原理及应用

介绍了人工智能的发展，并对改进的神经网络专家系统的优越性做了介绍，指出了神经网络专家系统广阔的应用前景及实现。     

浅谈计算软件的开发

软件开发重要的是 :确定编程语言 ,代码设计 ,程序设计 ,软件试验 ,人员培训等步骤     

勘探创造力的增强需要体制创新

建立一个与市场经济相适应的,对创造性劳动受到尊重、支持、鼓励的创新体制,是实现创造力持续增长的关键。为此就要在干部制度、分配奖励制度和资金管理制度上深入改革,进行制度创新,为培养造就综合素质强的复合型人才,使创造性工作能获得持久的动力与激励提供条件和保证。     

恒星光干涉仪样机的总控系统

控制系统以SCO公司的UNIX ODT为软件平台,普通PC机为总控计算机,通用8098单 片机系统作为前端机组成一个主从式两级管理系统,与PC机相连的16通道多用户卡通过RS-232与14个前端机通讯,进行实时控制和处理。用C语言编写了该样机的总控软件,前端机的通讯程序和相关控制部件的控制程序。经过调试,实现了对样机的全自动控制。     

实验室质量体系的建立与运行

详细论述了质量和质量体系的基本概念、建立质量体系的必要性、质量体系的构成和建立过程、质量体系文件的编制、质量体系的运行和持续改进以及中国实验室国家认可委员会的有关政策。     

AOTF红外光谱测量系统及其设计分析

介绍了一种以声光可调谐滤光器(AOTF)为色散元件的新型红外光谱测量系统。系统采用计算机控制下的直接数字频率合成(DDS)技术，实现电调谐波长扫描。采用双光束相关检测技术，改善了系统的信噪比。文中对红外光谱测量系统的有关设计问题进行了论述。     

Optimal Control of the Primary Drying Stage of Freeze Drying of Solutions in Vials Using Variational Calculus

The problem of operating freeze drying of pharmaceutical products in vials placed in trays of a freeze dryer to remove free water (in frozen state) at a minimum time was formulated as an optimal control problem. Two different types of freeze dryer designs were considered. In type I freeze dryer design, upper and lower plate temperatures were controlled together, while in type II freeze dryer design, upper and lower plate temperatures were controlled independently. The heat input to the material being dried and the drying chamber pressure were considered as control variables. Constraints were placed on the system state variables by the melting and scorch temperatures during primary drying stage. Necessary conditions of optimality for the primary drying stage of freeze drying process in vials are derived and presented. Furthermore, an approach for constructing the optimal control policies that would minimize the drying time for the primary drying stage was given. In order to analyze optimal control policy for the primary drying stage of the freeze-drying process in vials, a rigorous multi-dimensional unsteady state mathematical model was used. The theoretical approach presented in this work was applied in the freeze drying of skim milk. Significant reductions in the drying times of primary drying stage of freeze drying process in vials were obtained, as compared to the drying times obtained from conventional operational policies.     

一种计算机实时控制系统的分析及其DCS实现

简述了计算机实时控制及分布式控制系统(DCS)的一般特点．并以某型水下机器人的控制系统为例，详细介绍了一种小型实时DCS系统的具体实现。     

抽油机井系统效率简析

油田生产中广泛使用抽油机采油,机械采油的系统效率主要有地面效率与井下效率。在实际生产中,地面效率容易检测、计算和调整,井下效率则取决于产液量、动液面、泵效以及管柱的状况。文章仅对抽油机井系统效率进行简单分析与计算,旨在为优化设计抽油机运行参数提供参考。