A NEWFANGLED NORMATIVE FORM FOR SINGLE EIGENVALUE SYSTEMS     

Wang Jifeng Dept.of Mechanical  Electrical Engineering 《保鲜与加工》1992,(1)

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

Zhang Deshan 《保鲜与加工》1988,(2)

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.  相似文献   

The Control Strategy for the Excitation System of Asynchronized Turbogenerators     

He Yaosan Lin Jingdong Tang Zhuoyao Tong Mingru 《保鲜与加工》1995,(5):7-12

In this paper, the excitation principle and operating characteristics ofasynchronized turbogenerators are analyzed,and adaptive tracing iterative control strategy based on state identification is proposed. In order to apply this control scheme to practice engineering, some primary elements are analyzed and presented for constituting dual-channel automatic excitation control system of asynchronized turbogenerators. Finally, the paper presents the principle structure charts about excitation control system of asynchroized turbogenerators.  相似文献   

CALCULATION OF TNE END-EFFECT FACTOR OF SYNCHRONOUS MOTOR WITH CYLINDRICAL SOLID ROTOR     

Xiao Tiyan  Long Lili 《保鲜与加工》1994,(4):83-88

This paper presents the end-effect factor of Synchronous motor with cylindricalsolid rotor offered by analysing the 3-D electromagnetic field and using the Poynting vector.To ap-ply it in an actual calculation,the end-effect factor is proved correct and applicable.  相似文献   

An EOQ Model at Random when Average Demand Is a Linear Increasing Function     

LUO Bing  YANG Xiu Tai  XIONG Zhong Kai 《保鲜与加工》2002,(5):131-135

For certain types of inventory, the ordering cycle and demand may be random variants, which satisfy certain types distribution. The classical EOQ model usually neglects the fact. Based on the constant demand, under the hypothesis that the ordering cycle is a random variant which satisfies exponent distribution, average demand is a linear increasing function, this paper considers the effects of the time-value of capital and inflation on replenishment strategy of inventory system. Loosening the condition of basic economic order quantity model under deterministic state, the total cost function of the model is provided. The optimum order quantity and cycle are obtained. The application range of EOQ model under the constant demand is widened. The theoretical evidence is provided for the inventory system to make management decision.  相似文献   

Utilizing Industry Solid Wastes as Resource of Building Material in Chongqing     

JING Xiang-hai  LUO Hui 《保鲜与加工》2001,(3):50-54

To embed or heap industry solid wastes somewhere will occupy the earth and pollute the environment seriously. So utilizing the industry solid wastes as regeneration resource is important for sustainable development of city. Based on application and research for years in utilizing industry wastes and widely investigation, the produce status of industry solid wastes in Chongqing such as fly ash, desulfuration gypsum, blastfurnace slag and chromium slag are introduced. At the same time,this paper introduces application and research on these wastes in field of building material in Chongqing. Analyze problems and countermeasures during utilizing industry solid wastes as regeneration resource in Chongqing. As a further the prospect of utilizing industry solid wastes as regeneration resource of building material is discussed.  相似文献   

Study on the Sedimentation Rule of the Particles in Debris Flow     

CHEN Hong-kai  SHU Xiao-hong 《保鲜与加工》2007,(4):99-103

In this paper, according to the study on a great number of experiments and data analyses, the sedimentation rule of solid particles in debris flow is set up. Three main factors that influence the particle sedimentation in debris flow were studied; the basic reasons to influence the particle sedimentation were analyzed. The particle sedimentation in debris flow could be divided into three stages,i, e. the starting stage, the quick sedimentation stage and the accumulation stage,and detailed analysis on the sedimentation process each stage was made. The liquid viscosity, particle quality and additional water pressure have an important role on the sedimentation rule of the particle in debris flow.  相似文献   

农田土壤含水率与坚实度快速信息采集系统   总被引：1，自引：0，他引：1  

邵玲  林剑辉  孙宇瑞 《农机化研究》2007,(2):83-86

介绍了一种农田土壤含水率与坚实度快速信息采集系统.本系统包括土壤介电传感器、圆锥指数传感器及深度传感器,可以快速、同步、实时地获得0～500mm范围内土壤剖面含水率与圆锥指数信息.同时,本系统还结合了GPS和GIS技术,实现了土壤参数的空间分析,可以更方便地把系统应用于农田信息管理.本系统为实现土壤水分和坚实度的同步测量搭建了一个智能化的试验平台,并且在与德国波恩大学农业工程研究所的合作中成功地应用于田间测量.  相似文献   

城市垃圾填埋及沼气收集利用   总被引：17，自引：1，他引：17  

聂永丰  张秀蓉 《中国沼气》1997,15(2):17-20

本文针对目前我国日益严重的城市固体废物污染环境的问题，在对此填埋，焚烧和高温堆肥等处理处置方法的基础上，分析了填埋产沼技术的可行性，指出其兼有的废物处理与处置的双重性，具有处理量大、处理费用低、可还原利用上地、能回收能源等多种优点，在我国有广阔应用前景。  相似文献   

车用永磁式缓速器研究现状与展望     

赵小波  周俊  姬长英  黄亦其 《拖拉机与农用运输车》2007,34(5):6-8,10

概述了车用永磁式缓速器的研究意义、工作原理及特点,着重阐述了车用永磁式缓速器的国内外研究现状;分析了永磁式缓速器研究过程中存在的问题,并针对问题提出了未来研究重点和发展趋势。  相似文献