最新刊期
卷 10 ， 期 4 ， 1988
- 摘要：The frame-wall structure is good both in operational performance and mechanical property. In this paper, the shear-wall is considered as a cantilever thin-wall member, and the frame as a multistoreyed shear model. The theory of structural matrix is used to get a series of stiffness matrix formulas of theunsymmetrical framewall structure. The Largrange equation is used to get dynamic equation of the structure in the form of matrix. At last a 43 storeyed model of unsymmetrical frame-wall structure is calculated, the result is close to the test.509|8|0更新时间：2023-11-28
- 摘要：In this paper, the solution of cylindrical bending problem for rectangular plates supported by elastic and tensile supports on particular deformation condition are derived from practical engineering problem. By examples, some considerable matters of analysing prismatic structures are suggested. The solutions are also studied when the tensions are to be determined. the results are simple and easy to be used.532|7|0更新时间：2023-11-28
- 摘要：This paper comprehensively discusses the interface between AutoCAD and the advanced language. It presents three main ways: by means of . DXF file, SCR file and AutoLISP language. The former two have been used by some people in China. This paper presents the method with its programs for its accomplishment. As to the last one, the author has developed its application with the method for its accomplishment, the problem and the handling method for deletion of library function. AutoCAD can be used as support software for microcomputer CAD. This paper provides some references for technical personnel concerned. The programs in this paper have been all verified by IBM PC/XT, GWO520-CH. The pictures are drawn by DMP-56A.760|8|0更新时间：2023-11-28
- 摘要：In the light of development of integrating AutoCAD menu on architectural structure footing series which can integrate computing with drawing, this paper studies the interface between AutoCAD and advanced languages and presents a kind of interface suitable to menu. In combination SCR file with Defun fuction. this paper solves the problem of insufficient node space and the problem that function can not be recursively called while making use off AutoLISP language.655|18|0更新时间：2023-11-28
- 摘要：This paper briefly introduces Patankar-Spalding Method, which is systematical, active and widely applicable in numerical heat transfer and fluid flow. The corresponding dependent variables, diffusivities and source terms for the general differential equations under all circumstances are explained. By using this method the calculation of two-dimentional Poiseuiue Flow and Couette Flow compared with exact solutions are proved to be high precision. with two-dimentional path-flow in the heat convertor intersification devices as an example, the tilted method is used with FORTRAN 77 programming, and the calculation is done on a SIEMENS 7570c minicomputer.1389|8|0更新时间：2023-11-28
- 摘要：B_*-axiom is introduced by professor Li Xiaochuan, who has done many studies on it. This paper-proves multiplicative properties of the metric spaces satisfying B_*-axiom; and proves that Cartesian countable product of the B_*-spaces must have B_*-metrization. This is an important result on the B_*-axiom.829|7|0更新时间：2023-11-28
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- 摘要：This paper gives a brief description of the basic theory of settling simulation at home and abroad and studies the method for sedimentation to simulate a peripheral feed settling tank for municipal sewage treatment. The conclusion obtained from experiment shows that the flocculating suspended particles in the municipal sewage settle mainly in a state of gradient flocculation during the flocculation settling process. To simulate this gradient flpcculation settling, besides modeling according to the principles of equal-velocity flow and keeping similarity on water quality conditions, the ratio of influent suspended solids concentration must be made inversely proportional to the ratio of square root of settlion tank sizes, Co_m/Co_p=(lo_p/lo_m)~(1 2). According to this guiding idea, contrast tests in laboratory and in situ are carried out. Through observing the flow patters ia the models and comparing their hydraulic characteristic param eters and sedimentation efficiency with that of the hypotheical prototype, the equaton given above is verified with sufficient accuracy and practical value.418|7|0更新时间：2023-11-28
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- 摘要：This paper analyses the change of raw water quality by the addition of coagulant and the existing form of Fe and H_2 SiO3 in the water and their effects on lime dosage. On the basis of this analysis, the existing formulas of lime dosage is revised, and rational formula derived, which agrees with practice991|7|0更新时间：2023-11-28
- 摘要：This paper reviews the recent developments in the research of existence and uniqueness for the solutions of resistive circuits with topological approach. The relative fundamental results are demonstrated with some application examples. The physical interpretation and limitation of the topological criteria are also given.503|8|0更新时间：2023-11-28
- 摘要：This paper proves some properties of homogeneous function. Mainly, it proves that a sufficient condition of a parahomogeneous function is a subhomogeneous function. From which the relations of homogeneous function and partial derivatives of its respective variables are obtained. By these properties, this paper finally solves spcial first order total differential equations and obtains the quadrature of total differential of some function with n-variables. The obtained method of solution is simpler than usual one.4021|9|0更新时间：2023-11-28
- 摘要：This paper studies the tactics choice and its improvement in the development of economy by means of Markovian Decision Programming. An optimal decision and the maximum expected revenue can be obtained. The . paper also presents the procedures and formulas of numerical evaluation.745|9|0更新时间：2023-11-28
- 摘要：This paper introduces a controlled temperature system in which the silicon controlled rectifier is controlled by a TP-801 microcomputer. A common-used PID expression is usually applied to control temperature, but it is necessary to adjust three parameters, making the operation quite inconvenient. This system adopts the measurement of a simplified expanded-critical proportion, only one parameter is necessarily adjusted. In addition, the method of digital triggering is applied so that the D/A transfer and silicon adjuster are omitted, thus decreasing the cost and increasing the reliability of operation. This system has higher precision of control and better degree of linearity of temperature increment or decrement.401|7|0更新时间：2023-11-28
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