Scanning Beam Method for the Contour Graph

The tracing method is applied to generate the contour graph, it is difficult to find the start point of the interior closed contour beam. This paper presents a general scanning beam method which can be applied to generate color contour graph for elements with arbitrary shape by the object-oriented programming. We give visualization of the elements of triangle the element with 3 Points, triangle element with 6 Points, quadrilateral element with 4 Points, quadrilateral element with 8 Points, quadrilateral Element with 9 Points and the example by the MFC of Visual C++ R6.     

THE RIGID-VISCOPLASTIC FINIT ELJMENT ANALYSIS OF NON-STATIONARY FLOW OF METALS IN THE EDGE ROLLING

The rigid-viscoplastic finite element formulations for the analysis of non-stationary deformation in the edge rolling is established on the basis of the simplified 3-D. element. A new method for obtaining inital velocity field is developed in this paper. It has been used successfully to analyse the non-stationary deformation in the edge rolling of lead plates. The calculated results are found to be in good agreement with those obtained from expriements.     

Study on Equivalent Frame Model for Large-span Prestressed Concrete Residential Structure System

In this paper, a study is carried out on large-span prestressed concrete structure system in residence analyzed by specially - shape column equivalent frame model. Applying fiber model column-beam element and shell element, a large amount of comparative analyses about large-span prestressd concrete structure under horizontal and vertical load is carried out. The parameter of the equivalent frame is confirmed based on comparison with the result of the man-sized structural experiment. It is proved that the equivalent frame model has high efficiency and precision especially for nonlinear analysis.     

不同缺素处理对库尔勒香梨果实品质的影响

在田间条件下,对20年树龄库尔勒香梨设置不同缺素的施肥处理,研究营养元素缺乏胁迫下库尔勒香梨果实品质的变化。结果表明：施肥能明显促进香梨果实的生长发育,提高单果重和产量;改善香梨果实形状,提高香梨红晕果率及果实中还原糖和维生素C的含量;降低香梨果皮厚度、果实硬度及果实中总酸的含量。香梨果皮厚度、果实硬度、单果重和产量的施肥效应N＞K＞P;果形指数、红晕果率及果实中还原糖和维生素C含量的施肥效应K＞P＞N;果实中总酸含量的施肥效应N＞P＞K。     

THE ANISOTROPY DISCONTINUITY MODEL DUO TO THE STRIKE OF THE TAGGED DISCONTINUITIES

In this paper, on the base of the original shapes of discontinuities in engineering gedogy, we mainly discuss the ralations among the shape of discontinuity, the restraining effects of discontinuity deformations (including the normal deformation and the shear deformation ) and the crustal stress. Then we put forword the concept of the pseudo-dilatancy ungle which can indicate the motion direction, set up the anisotropic discontinuity model, and give some important results and formula for illustrating truly the discontinuities in rock engineering.     

不同株型对棉种产量和品质影响的研究

棉花良种产质量的形成除生态气候条件外与株型的关系十分密切。当前联产承包、讲究综合效益的情况下,中等密度逐渐取代过密过稀群体,中壮株型(高度适中、植株健壮、根系强盛)逐渐取代高大株型和矮小株型,经济施肥和适促适控逐渐取代大肥大水和多促多控,为大多数良种繁殖地区所接受,并充分显示良好的经济效果。本文就不同株型对棉种产量和品质的影响进行连续2年的研究,旨在探讨一定密度条件下不同株型农艺、经济性状的比较及其相关,最佳株型产量的合理结构,各生育阶段的发展动态,株型塑造的最佳选择等,为良种繁殖和优化株型提供科学依据。     

A BOUNDARY ELEMENT METHOD FOR SOLVING DIRICHLET PROBLEM OF THE HELMHOLTZ EQUATION IN R~2

This paper presents a boundary element method for solving Dirichlet bou-ndary value problem of the Helmholtz equation in R~2.First,the existence andthe uniqueness of an extended solution for the problem are obtained.Then,thesolution is expressed in terms of simple layer potentials,and this expression,which is suitable to the interior as well as the exterior problem,leads to aboundary integral equation of the first kind.Finally,a finite element approachis applied to solve a variational form which is equivalent to the boundaryintegral equation.     

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.     

Intensity Comparative Analysis Based on Ideas Between Involute Gear and Double Involute Gear

Modeler and simulation modules in Ideas software are used to build the finite element models on involute gear and double involute gear with accurate tooth shape, and with the same design parameters and under the same loads, finite element contact analysis has been done. At last, the contact stress and bending stress on the two types gear transmission at the different meshing positions are solved out, and comparative analysis and study have been done. At the same time, that the ladder-shape tooth on the double involute gear how to influence contact stress and bending stress is emphatically analysed. All above offer the theoretical foundation that bring the double involute gear with ladder-shape tooth into the industry.     

THE SPLINE BOUNDARY ELEMENT METHOD FOR CALCULATION OF ELECTROMAGNETIC FIELD PROBLEMS

The spline boundary element method is presented for electromagnetic field problems. Based on B-spline function interpolation, the formulation of calculation of two dimensional statical electromagnetic field problems is obtained. Boundary corner and singular integration problems are efficiently handled. Furthermore,the Method is used for solving two calculation examples.     

THE MECHANICAL MODEL ON IMPACT SYSTEM AND ITS PARAMETER IDENTIFICATION

A new mechanical model on impact system with non-linear element is presented and the practical method for measuring and identifying the parameters is also studied. The results of the experimental analysis and theoretical calculations are satistactory. And we hope to provide more acurate theorecical model for the study and design of impact dampers.     

砂土地基上圆形浅基础三维破坏包络面的理论研究

对砂土地基上圆形浅基础在竖向荷载V、水平荷载H及力矩M复合加载条件下的承载力进行了系统的三维有限元分析。在分析中,砂土假定为纯摩擦材料,遵循基于Mohr-Coulomb破坏准则的理想弹塑性本构关系。首先,对圆形浅基础的竖向承载力进行了有限元计算, 并与滑移线解法进行了对比,两种方法所得结果比较吻合。进而探讨了砂土内摩擦角对于基础在V-H、V-M荷载平面与V-H-M三维荷载空间内的破坏包络轨迹的影响。计算结果表明,与不排水情况下软黏土地基上基础破坏包络面相比,砂土地基上圆形浅基础的破坏包络面形状有较大差异, 但V-H和V-M平面内的破坏包络面形状仍具有较好的归一化特性。基于有限元计算结果,建立了圆形浅基础在V-H-M三维荷载空间内的破坏包络面方程, 该方程可用来合理评价复合加载条件下砂土地基上圆形浅基础的整体稳定性。     

Building Technology and Art of Tujia Folk Houses in the Southeast Chongqing

以"陕秋白"大白菜成熟叶球为试材,研究了低温条件下4种保鲜液的保鲜效果.结果表明,在保持切割白菜9分水平上,各处理的效果依次为D＞C＞ck＞B＞A;在7分水平上,各处理的效果依次为D＞A＞C＞ck>B;在5分水平上,A、C、D处理效果相近,高于对照,处理B与对照相近.总体比较,0.01%NaHSO3的D处理和0.01%NaClO的C处理保鲜效果较好.并对保鲜期间出现的褐变、霉变、愈伤组织等现象进行了分析与讨论.     

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.     

Numerical Simulation on Coupling Problem between Debris Flow and Bank of Debris Flow Valley

Compared with the traditional welding truss-column in shape of A, the members of the bolting top-joint are much smaller than the common welding joint. Furthermore, the members are more convenience on fabrication, transportation and installation. It should be noted that the zinc process is much easier and cheaper. In this paper, by using the finite element method, the effect of many factors to the global stiffness and the intensity of the bolting truss-column are analyzed; the factors include the column height, the root width to column height ratio, the tube thickness, etc. The results obtained are favorable references for design and optimization of the bolting     

柑桔渣制猪饲料的开发研究

文章对食品饮料工业下脚料资源－柑桔渣的综合开发利用进行了研究。采用化学浸泡，物理压榨和微生物发酵途径，能有效地减少了或脱除柑桔渣中影响猪适口性的苦味成分，保持或增加柑桔渣的营养成分。发酵后的柑桔渣可以作为猪饲料原料，开发了非粮饲料资源，减少了环境污染，具有明显的经济和社会效益。     

宿根甘蔗的基础——芽和根

通过解剖和应用 P~(32)示踪,明确了各节位蔗芽的构造,老根系的作用,以及根系提早发生的原因。研究了宿根甘蔗的丰产技术,认为破畦松兜的增产效果最为明显。     

BOUNDARY ELEMENT METHODS AND ERROR ANALYSIS FOR THE SOLUTION OF ELLIPTIC NEUMANN PROBLEM IN R~2

This paper presents boundary element methods for the solution of elliptic partial differential equation with Neumann boundary problem in R~2. Total details of error analysis are given for general condition, and optimal estimates are obtained. For simplicity Laplace's equation is discussed in illustration.     

Structural Analysis of the Bolting Truss-column of Substation

Compared with the traditional welding truss-column in shape of A,the members of the bolting top-joint are much smaller than the common welding joint.Furthermore,the members are more convenience on fabrication,transportation and installation.It should be noted that the zinc process is much easier and cheaper.In this paper,by using the finite element method,the effect of many factors to the global stiffness and the intensity of the bolting truss-column are analyzed;the factors include the column height,the root width to column height ratio,the tube thickness,etc.The results obtained are favorable references for design and optimization of the bolting truss-column of substation.     

DETERMING THE RELIABILITY OF A MEMBER WITH CRACK ACCORDING TO THE INFORMATION FROM FLAW-DETECTION WITH ULTRASONIC WAVE

Using the flaw-detecting with ultrasonic wave one may know the equivalant area of a crack that burys in the member. If the crack is ellipse shaped, the equivalant area is constant, and the distribution function of its major semiaxle and the plane strain fracture toughness of the material are given, then we would get the probability of reliability of the member under the uniform tension. In this condition, a formula of calculating the probability would be provided in this paper. Because a simple and enough precise approximate function has been introduced the formula in the paper is simple in shape and easy to use.