A NEW METHOD FOR DESIGN OF PSS PARAMETERS

The eigenvalue sensitivity methods is very useful not only in analysis of electric power system stability but also in design of the controllers. In this paper a new optimal method is proposed to design the parameters of PSS. Using this method the PSS is designed for a single machine-infinite bus system, and the results of digital simulation show that this method is very effective and useful.     

THE APPLICASION OF SUPERVISOR CALL(SVC) FUNCTION IN DEVELOPING OF RMS SYSTEM

RMS system is a running management system self designed and developed for M304s computer system. Supervisor call (SVC) is one kind of method of communication between user and system in designing of operating system. This article introduces you the way how to resolve the problem in RMS design by using supervisor call function, with brief introduction of system design.     

THE OPTIMAL DESIGN AND ENGINEERING APPLICATION OF DISTRIBUTION

This paper introduces the metod of optimal design of municipal water distribution,The main points are the theory,mathematical model,program frame figure and example in practice of the optimal method of hydraulics.The program is applicable to the design and calculation of the pipe network in a city. It gives a simple and convenient calculation method for multiple-scheme design and scheme cmparison of water supply system.     

基于ARM平台的多功能滴定软件设计

介绍了一种基于ARM平台的多功能滴定软件设计方法。说明了滴定系统的结构和ARM软件架构,描述了可编辑通用方法框架的实现过程、滴定方法的工作流程和公式解析引擎的设计原理,最后给出了数据处理的图形化结果。该软件具有友善的人机界面,稳定性好,精度高。     

PRACTICAL DESIGN OF PROBABILISTIC LIMIT STATES FOR STEEL STRUCTURES OF TALL BUILDING

For design purposes, this paper presents performance coefficients for steel structures of tall building, and furthermore design values of strength of heavy plates. The calculated results show that suggested coefficients meet the requirements of probabilistic limit states design method. They can serve as a supplement to GBJ17-88 and the expression of limit states design provided in this paper is available for reference in compilation of concerned standard.     

粮堆高度对机械通风粮层阻力的影响

粮层阻力是设计储粮机械通风系统的一项重要参数。本文主要分析了粮堆高度对粮层阻力的影响,通过试验进行实测,并采用多元回归的方法,得出了新的经验公式P＝ahbvc。     

OPTIMAL DESIGN WITH WHOLE STRUCTURE PARAMETERS OF LOWER PART OF HUGE EXCAVATOR

A optimal design with whole structure parameters and its program are carried out. A reasonable model is established. Using the method a optimal design with whole structure parameters by original parameters of American P&H2300xp excavator was calculated. The size,carried out by the method,approximates to the size of P&H2300xp excavator very well.     

粮食安全储藏与房式仓保温隔热性能设计改进的探讨

从储粮生态系统控制的角度阐述了粮仓保温隔热性能的重要性和实用性,突出粮仓设计和使用的协调统一;针对新建粮食储备房式仓使用中多数出现仓顶隔热性差、门窗洞口气密性差、仓内粮面温度过高的问题,结合实践经验,对房式仓朝南墙面门窗的设计、保温隔热屋面的设计、仓内地坪适当下挖装粮的设计等进行了探讨,提出了实用性设计方法和"半地下储粮房式仓"新仓型的设计思路.     

INVESTIGATION OF DEVELOPMENT SYSTEM OF 1802 MICROCOMPUTER

Based on general concepts of microcomputer developmentsystem,the design concept and main characteristics of 1802 microcomputerdevelopment system are introduced in this paper.This system is ratio-nally designed,powerful in function and very useful for further develo-pment and application of 1802 host computer in communication.     

粮食定等智能检测系统研究设计

论述了粮食定等智能检测系统的设计思路;重点介绍了小麦、玉米质量智能检测系统的通讯协议、软硬件的设计和功能特点,该系统改变了传统人工检测、手工录入数据的模式,实现了收购定等质量指标及储藏品质判定仪器数据的自动采集、传输和统计,并与智能化粮库管理平台的数据库实现了数据实时交互和共享,为粮油收购质量源头控制提供了技术支撑;展望了粮食仓储企业质量检验信息化的发展方向。     

嵌入式Linux系统在粮库中的应用

近年来，随着嵌入式计算机技术的飞速发展，嵌入式系统得到了越来越广泛的应用，尤其是在工控、仿真、数据采集等领域。嵌入式系统需要嵌入式操作系统作支持，而由于Linux操作系统结构清晰，源代码开放性等方面的优势，在嵌入式系统中也得到了广泛的应用。本文以中央储备粮赤壁直属库管理监控系统的设计为背景，论述了基于Linux的嵌入式工作站取代传统的工控机为主的现地控制单元在粮库管理监控系统中的应用过程以及基于Linux的嵌入式工作站的设计。     

Design Method of a Metal V-belt CVT Hydraulic System

The design method on the hydraulic control system is one of the key technologies of a metal V-belt continuously variable transmission(CVT).It can change the ratio of the transmission system by adjusting the pushing force of the pulley.By analyzing the structure characteristics and force relations,the design method of an important parameter of the CVT hydraulic system and the rate of transmission ratio,are put forward by simulating to the emblematical driving models.The structure parameters of the hydraulic system is gotten and validated by simulation on specific driving model.An effective design method is provided to develop the continuously variable transmission system.     

A MODEL SYSTEM OF A LONG-TERM PROGRAM OF EDUSATION DEVELOPMENT AND ITS APPLICATION

This paper studies a long-term program of education development in the light of the theory and method of system engineering.A complete mathematical-Simulant model system is used to describe the internal regularity of an edu-cation system inside a social-economic tystem,and to put forward a set of efficient method for education development programming.The mathematical-simulant model system dis-cussed in the paper is put to practical use in a regional education programming.     

PAYING ATTENTION TO USE SIMPLEX METHOD FOR OPTIMAL MULTIPARAMETER IN THE DESIGN OF CONTROL SYSTEM

In the design of control system using simplex method for optimal multi-parameter,if the difference in number between the greatest and the smallestparameters is very great,the optimization process converges very slowly.Evenoptimal parameters can't be found at all.This paper studies the problem,analyses its cause and poses a resolution means.A testing example shows thatthis means can solve the above problem well.     

COMPUTER ALDED DESIGN OF FORMING CUTTER FOR REVISING INVOLUTE HELICAL

In this paper, a calculation method of forming cutter contour of involute helical with arbitrary easement is presented, the segmantal arcs of the best uniform approximation and tolerance to fit smoothly the cutter contour points are used the profile on the cross section of the helical is calculated and the design of the cutter is examined. The method can be used to design precision forming cutter of involute helical with the arbitrary easement. It is valuable in engineering application.     

A CALCULATION OF THE ECCENTRICALLY LOADED BRICKWORK WITH BIAXIAL BENDING IN TERMS OF ULTIMATE STRENGTH DESIGN METHOD

This paper suggests a calculation formula for eccentrically loaded brickwork or column with biaxial bending in terms of ultimate strength design method. The coefficients of the formula, are compiled as design charts so that the formula can be directly used for design of this kind of structural members.     

基于无线传感器网络的智能粮仓监控系统

分析了目前粮仓监控的现状,设计了一个基于无线传感器网络监控系统体系结构.设计了系统的GSM通信模块,给出了系统数据传输数据的设计,及系统端口初始化的核心代码,设计了系统智能监控流程,从而解决了系统开发运行的难题.最后通过系统的试运行,验证了系统的设计与开发思路的正确性.     

THE OPTIMAL DESIGN CALCULATION OF te(MC)MEDIA FILTER

This paper introduces formula total water headloss of MC media filter anddiscusses the parameters of design calculation of MC media filter through the experiment.In the end,the optimal design calculation method and its program diagram are given.The method is important toguide the design of MC media filter.     

SERIES-PARALLEL CORRECTION AND CAA FOR CANONICAL SYSTEM TYPE 2

This paper presents a simple and efficient engineering design method of series-parallel correction for canonical system type 2 and gives a practical design example.The following and anti-disturbance performances of the system by means of digital simulation are analyzed.The performance indexes in different design parameters are listed.This paper is available for reference in engineerng design.     

新12型可吸式粮堆局部通风系统通风降温试验

采用新12型可吸式粮堆局部通风系统进行粮堆局部通风，有效面积达100m^2，配置的轴流风机功率2．2kW，通风降温效果非常明显。其设计合理，使用方便，降温效果好，节约能耗，用途广泛。