THE NEW METHOD-QL SYSTEM FOR MEASURING DYNAMIC ACCURACY OF THE DRIVETRAIN

The paper introduces a new method-QL system suggested for the first time by the author for measuring dynamic accuracy of gear cutting machine drivetrain. The system has many uses. It suits not only the measurement of mid-size machine tool but also the measurement of very slow speed, large ratio, large-size machine drivetrain     

THE ARC-LENGTH METHOD OF SECANT RIGIDITY IN FRAME ANALYSIS

The secant rigidity is used for the are-length method to solve the nonlinear finite elements problems. The advantage of this method is unnecessary of calculating the initial resistance term caused by the incremental step. The computational work is less and the programing is easier as compared with initial are-length method. This method can be widely used to solve nonlinear problems.     

DYNAMIC ANALYSIS AND NUMERICAL METHOD IN PHE DRIVE MECHANISMS OF THE STEEL-TUBE COLD-ROLLING MACHINE

In this paper, the calculating formulas for partial dynamic balance of crankslider mechanisms are derived in terms of the limear independent vector theory. The driving torque and the optimum selections for partial dynamic balance in drive mechanism of the steeltube cold-rolling machine are carried out. The method in this paper has a universal reference meaning for the partial dynamic balances of crankslider mechanisms.     

DYNAMIC ANALYSIS AND NUMERICAL METHOD FOR THE HYDRAULIC SYSTEM IN A TUBE AND FORM-BAR PRESS MACHINE

In this paper, dynamic analyses are made for (he pump and energy-store hydrauic system in a 3150 ton tube and form-bur press machine. The formulas for calculation are derived, and the so are the relationship between the press and the displacement, and the velocity and the acceleration. Numerical calculations are also made. The calculated results coincide with the measured data. The method in this paper has a universal reference meaning for all types of press machines with the type pump and energy-store hydraulic system.     

夏玉米耗水量和耗水规律分析

在作物与水分关系研究中,产量是确定耗水量的重要因子,但不是唯一因子,要同时考虑水分利用效率和经济效益.本文在试验资料的基础上,研究了夏玉米产量和耗水量的关系,运用最优分割理论对水水利用效率进行最优分割:同时对不同水分处理的籽粒产量、秸秆产量、水分利用效率和灌水费用等进行综合评判,进而确定夏玉米耗水量指标.然后对不同生育阶段耗水规律和降水时间分布进行了分析.为夏玉米田间水分管理和进行气候评价提供依据.     

谷蛋白和醇溶蛋白的电泳分析及小麦品种鉴定

应用不同浓度梯度的聚丙烯酰胺凝胺SDS电泳比较分析了18个小麦品种的、用不同提取方法制备的醇溶蛋白和谷蛋白.结果表明,经1M脲素提取掉多数醇溶蛋白、清蛋白及其它醇溶成分后的小麦样品,用加有2%SDS和5%β—巯基乙醇的裂解缓冲液提取的高分子量谷蛋白和醇溶蛋白,在8—12%梯度的SDS胶中显示出良好的分辨率和极大的多态性,适于小麦品种鉴定.用裂鲜缓冲液直接提取半粒小麦的全蛋白可用于逐粒品种鉴别.     

THE ELESTOPLASTIC DYNAMIC ANALYSIS OF RC PLANAR FRAMES AND ITS PROGRAM

This paper makes use of a beam-colunm model in the elastopl-astic dynamic analysis of RC planar rames.For which an improved method is presented to estabish the envelopes of moment-curvature relationships by appli-cation of RC nonlinear analysis,and a program named PFEPDA suitable to mic-rocomputer is developed.     

THE METHOD AND ITS APPLICATION FOR COUPLED ANALYSING PLASTIC DEFORMATION OF ROLLING WORKPIECE AND ELASTIC DEFORMATION OF ROLLS

A method for coupled analysing plastic deformation of rolling workpiece and elastic de'formaticn of rolls is developed. The interaction of plastic defo rmation of rolling workpice and elastic deformation of rolls is considered. The couple is formulated by setting up force equilibrium equation at the interface of the rolling workpiece and tne rolls. The plastic deformation of rolling workpiece is treated by the rigid plastic finite element method and the elastic deformation of rolls is treated by the boundary element method. The rolling presure, perunit. forward slip, neutral from angle obtained from coupled analysis are lower than those obta-ined rigid rolls. The results obtained from analysis show that the analytical accuracy can be heightened using the coupled ana-ytical methcd dveeloped for treatng rolling3proccss.     

THE APPLICATION OF MULTIBODY DISCRETE METHOD IN RING''S VIBRATION ANALYSIS

A ring's muJtibody discrete model is discussed in this paper. The ring's plane geometric nonlinear vibration equations are derived. Compared with the finite element and lump mass methods, this method is better. In the last pa it of the paper, the eigenvalues, the first 9 modes of the ring, the geometric nonlinear dynamic responses of the ring are calculated.     

小麦二十四个亲本双列杂交配合力、遗传力和杂种优势的分析

作者选用了常用的24个小麦亲本,组成不设反交的双列杂交,计有300个不同的遗传型。统计分析的主要结果如下:(1)24个亲本9个性状的一般配合力、8个性状的特殊配合力均达到了0.01工的显著水准。(2)依据各品种诸性状一般配合力效应和特殊配合力效应方差等统计估量,比较全面地分析了各亲本的遗传特性。(3)各性状的狭义遗传力由大到     

粮食粉爆事故分析与安全评估方法

通过对近20年来我国部分省市发生的重大粮食粉尘爆炸事故的分析，提出了防止粉尘爆炸的安全评价方法。     

香料烟结晶细胞超微结构、性质及分离方法研究

研究表明,香料烟株内结晶细胞是一类特化的含晶细胞,细胞内充满晶体,晶体形状似角锥状,质体等被挤到细胞边缘。叶片成熟过程中,结晶细胞超微结构发生变化,质体逐渐退化,胞基质逐渐干缩。结晶细胞与普通细胞相比有较高的钙含量,因此推测细胞内结晶体可能是一种钙盐结晶,但不排除结晶体可能含有尚未证实的有机物成分。同时,在试验中,初步摸索出了结晶细胞的分离方法。     

THE METHOD OF FORMING HOURLY OUTDOOR TEMPERATURE BY SPLINE FUNCTIONS AND ANAYSIS OF ERRORS

It is necessary to input the hourly meteorological data in order to analyze building annual energy consumption and to simulate dynamically air-conditioning systems.The hourly outdoor temperature constituted by cubic splineinterpolation when forming meteorological data is used for building energy anal-ysis.This paper analyzes the theory of spline function interpolation errors affe-cted by boundary conditions and introduces the methods to decrease interpolationerror.     

AN ENTHALPY METHOD OF SOLVING PHASE CHANGE PROBLEMS BY COUPLING THE ENTHALPY AND THE MOVING BOUNDARY

A numerical enthalpy method is proposed for solving the multi-dimensional phase change problem by coupling the enthalpy and the moving boundary. Its basic feature is to sepasate appearent and latent heat terms by transforming the standard enthalpy relation and to couple them into the latent heat term by introducing the idea of phase change rate between the axes and simultaneously to correct the heat flux of the inflowing/outflowing phase change control volume element , so that the accuracy of numerical solution is improved and the moving boundary can be accurately followed.     

ANALYSIS OF NONLINEAR PROBLEMS OF LAMINATED PLATES BY USE OF PERTURBATION AND WEIGHTEDRESIDUAL METHOD

This paper solves the geometrically nonlinear problems of symmetric, cross-ply laminated anisotropic rectangular plates subjected to uniformly distributed load by the higher-order shear deformation theory and taking an advantage of the perturbation and the weightedresidual method. First, with the help of the perturbation, the nonlinear partial equations have been changed into linear ones. This paper can solve these linear ones by the weighted-residual method. The combination of quintic B-spline functions are chosen as the basis of trial function and Dirac delta functtion, the weighted function. The method used in this paper is simple, direct and efficient. The numerical results show a good convergence and they are in good agreement with the available data.     

A METHOD OF GENERATING ACTIVE TREE TERMS USING THE "IMPROVED W-ALGEBRAIC METHOD

By defining an operator"M", the paper has applied the improved Walgebraic method to the directed graph. The developed theory does not make non-tree combination type terms and can eliminate a large part of cancellations terms caused by. the active elements or .transformers. The paper has solved the retrogration problem for algorithm of W-algebraic method while used in the directed graph.     

AREA-VECTOR METHOD CALCULATJJNG THE DISPLACEMENTS OF BEAMS AND FRAMES

A new method with which to calculat the displacements of beams and frames is presented. The areas of tending moment diagram of beam or frame and the slope at the origin of the elastic curve are treated as some rotatable vectors with this method. Angular displacement and in-line displacement can be calculated by using the projection and moment of these vectors. This method can be used to calculate displacement of the bar and the bar syttem ( including three dimensional forms. ) , which made from linear or ncnlinear elastic materials. The cross section of the bar is changeable.     

THE METHOD AND IMPLEMENTATION OF PRINTER FOR MULTI-FUNCTIONAI GRAPHS

In this paper,a method for communication with the prin-ter in programming is presented,and typewriting multi-functionalgraphic with the printer is realized.The driving progeam of typewrit-ing graphs is designed and in it the contacts are given.The programcan be called conveniently by other program languages and the situationof using it on the EPSON,CP132,DL3400 et cetera is excellent.Thereduction and expansion,rotating,clipping,making up and typewritingin a given position for the typewritten graphs are realized conveniently,the line of graphs are beautiful,and the velocity of typewriting issatisfied.