最新刊期
卷 12 ， 期 2 ， 1990
- 摘要：How to select automatically the disposition of steel bar in a computer aided design(CAD)system for reinforced concrete frame structure is aproblem relatedt ot he practicality and increasing capacity of the CAD system.This paper suggests a practical method for selecting steel bar of beam in framestructure with the application of knowledge and experience of the experts forreasoning and judging.The method is convenient for calculation.The results ofcalculation are in agreement with detailing requirement and usual engineeringpractice.The method has great practical value.551|19|0更新时间：2023-11-28
- 摘要：Under the condition of average sky model,this paper studies the luminous flux arriving at the window and suggests the modified daylightingcoefficient method for estimating the area of the window.The method is simpleand easy to be carried out.And according to average sky luminance model,this paper has carried out the calculation of average sky lighting with a computer.The method described above is verified reasonable and applicable in engineering.855|8|0更新时间：2023-11-28
- 摘要：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.568|9|0更新时间：2023-11-28
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- 摘要：On the basis of comparing with usual methods,a method for interfacing AUTOCAD with high-level language by LSP file is proposed in thispaper.It solves the problem that a large number of graphics are drawn continuallywhile DXF and SCR file are not in a condition to use.This method is simple andconvenient to make good use of AUTOCAD graphic functions.564|10|0更新时间：2023-11-28
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- 摘要：on the basis of the experimental studies of mechanical properties in brittle rock,the generalized elastic modulus,generalized elastic Poisson ratio,irreversible deformation Poisson ratio and damage deformation characteristic arediscussed.And then,a new damage variable is defined.A new nonlinear elastic-damage constitutive equation is built and the damage evolution equation is proposed.The nonlinear elastic-damage constitutive equation is verified in the uniaxialcompression test of quartz sandstone in Chongqing.The results show that reasonableagreement exists between the theoretical analysis and the experimental data.476|14|0更新时间：2023-11-28
- 摘要：This paper introduces new concepts of graceful matrix and har-monic matrix,and proves that a graph is graceful or harmonic iff there exists agraceful or harmonic matrix which is a P-adjacent matrix of a graph.This paperalso introduces a new concept of harmonic interlaced graph,and proves that agraph is interlaced iff it is also harmonic interlaced.919|7|0更新时间：2023-11-28
- 摘要：In this paper,the penalty element stiffness matrix of linkage of plates and shells is deduced accrding to the principle of the penalty elementmethod.This stiffness matrix can be also used for a linkage between shells andsolids.It is of some practical value in the finite element calculations of engineeringstructure.539|524|0更新时间：2023-11-28
- 摘要：This paper studies a class of singular Cauchy problem for aquasilinear hyperbolic equation and shows that there exists a uniquely stablesolution by quasi-differential operators.441|754|0更新时间：2023-11-28
- 摘要：In this paper,the error caused by the resistance of theMOSFET switch in the transmission of AC signals is straightforwardly derivedin combination with MOSFET physical model.The method ot decreasing transm-issiv eerror is presented.576|476|0更新时间：2023-11-28
- 摘要：In this paper,the concept of bifunction is introduced for the linear programming defined on the locally convex topological linear space.Theexistence of the solutions of the primal problem and its dual problem is discussed.And the relation between the primal problem and its dual problem is given.640|868|0更新时间：2023-11-28
- 摘要：This paper discusses dual-graph representations and Smith-diagram representations in the geometric description of building.These twomethods are quoted from Computer-Aided Architectural Design by Mitchell W.J.In this paper,they are discussed in combination with practical examples ofbuilding.In view of the fact that the references of CAAD is not enough inChina,this paper gives some help to people who engage in CAD.689|807|0更新时间：2023-11-28
- 摘要：This paper introduces the main structure and function,the theor-etical basis and the main features of the computer aided design software system QT-SCAD for the steel structure of tower crane.The QT-SCAD is suitable for allkinds of movable or fixable tower crane with level arm which rotates above thecrane body,and has single or double hanging points.It can be used for the stre-ngth,stiffness and stability analyses of the structure,the vibrative and dynamiccalculation of mechanisms and structure,and the optimal design of the structureof tower crane or its components.924|850|0更新时间：2023-11-28
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