最新刊期
      卷 11 ， 期 3 ， 1989
      • Sun Renbo, Wang Daiyu
        Vol. 11, Issue 3, (1989) DOI: 10.11835/j.issn.1674-4764.1989.03.001
        摘要：By using mixed triangle series,this paper discusses the calculation of rectangular stiffened plates with simply supported edge along direction of stiffeners under several local loads,such as uniform load on local rectangular area,concentrated force,concentrated moment of couple,line loads,line moments of equal and some equivalent concentrated forces acting on a line with equaldistance among them.All analytical solutions of both displacements and internal forces are derived.A numerical example to treat an engineering problem is given.  
          
        588
        |
        7
        |
        0
        <HTML>
        <DownloadPDF><Meta-XML>
        <引用本文> <批量引用> 44624981 false
        更新时间：2023-11-28
      • Zhou Qiguo, Long Lili, Xie Yuanyun
        Vol. 11, Issue 3, (1989) DOI: 10.11835/j.issn.1674-4764.1989.03.002
        摘要：This paper analyses in detail the dynamic stability of thedual-excited synchronous generators with non-damping windings,and sets up theundamental equations and the linearized mathematical model for small distur- bance analysis.By an example with computer results,the paper also compareshe difference of the dynamic stabilities between the single-and dual-excited synchronous machines,which explains that the dual-excited synchronous gene- rators can increase the dynamic stability of machines under certain conditions.  
          
        636
        |
        9
        |
        0
        <HTML>
        <DownloadPDF><Meta-XML>
        <引用本文> <批量引用> 44624786 false
        更新时间：2023-11-28
      • Vol. 11, Issue 3, (1989) DOI: 10.11835/j.issn.1674-4764.1989.03.003
        摘要：This paper applies the covering method to the isoparametrictransitional elements of movable boundary nodes.The general shape functionormulas for quadrilateral elements and a convenient method to calculate the local node coordinate parameters are also introduced.The general formulas can be extended to space hexahedron elements.  
          
        525
        |
        7
        |
        0
        <HTML>
        <DownloadPDF><Meta-XML>
        <引用本文> <批量引用> 44625683 false
        更新时间：2023-11-28

      • OPERATOR SERIES SOLUTION FOR ONE CLASS OF CAUCHY PROBLEM

        Ke Honglu
        Vol. 11, Issue 3, (1989) DOI: 10.11835/j.issn.1674-4764.1989.03.004
          
        636
        |
        20
        |
        0
        <HTML>
        <DownloadPDF><Meta-XML>
        <引用本文> <批量引用> 44624808 false
        更新时间：2023-11-28

      • BEZIER-BERNSTEIN CURVE AND ITS MATRIX REPRESENTATION

        Wang Lelin
        Vol. 11, Issue 3, (1989) DOI: 10.11835/j.issn.1674-4764.1989.03.006
          
        1449
        |
        15
        |
        0
        <HTML>
        <DownloadPDF><Meta-XML>
        <引用本文> <批量引用> 44624851 false
        更新时间：2023-11-28

      • THE COMPILING OF EIGHTH AND SIXTEENTH ORDER MAGIC SQUARE

        Zhang Changcai
        Vol. 11, Issue 3, (1989) DOI: 10.11835/j.issn.1674-4764.1989.03.008
        摘要：This paper introduces how to compile the mathematic model ofeighth and sixteenth order magic square and how to change twofold magic squ-are problem into onefold magic square problem.The twofold magic square is made by solving liner equations and thus the difficulty of making the twofoldmagic square is reduced.  
          
        507
        |
        478
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 44625848 false
        更新时间：2023-11-28
      • Deng Xianrong, Heng Zhi
        Vol. 11, Issue 3, (1989) DOI: 10.11835/j.issn.1674-4764.1989.03.009
        摘要：This paper presents the structure and main function of a methanealarm and power-off control device controlled by a single-chip microcomputer,which is first used in China.This paper mainly discusses the circuitry and work-ing principle of a computer and how to solve some special problems when the single chip microcomputer is used in a coal mine where methane exists.  
          
        401
        |
        483
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 44625615 false
        更新时间：2023-11-28
      • Long Tengrui, Hao Yiqun, He Qixiang, Zuo Yuzhen, Tian Ping
        Vol. 11, Issue 3, (1989) DOI: 10.11835/j.issn.1674-4764.1989.03.010
        摘要：This paper studies the performance of a gas-Iiquid-solid fluidizedbed bioreactor(FBB)for the slaughter treatment.The results show that the COD removal rate is higher than 80% when COD concentration in the influent waste-water is about 1000mg/1 and the hydrauIic residence time(HRT)is 124.5 minutes.n the experiments,the crushed granular shale used as media in FBB has advan-tages of slight weight,easy fluidization,ease of attaching by microbes and cheap-ness.  
          
        346
        |
        498
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 44625792 false
        更新时间：2023-11-28
      • Chen Liangchun, Zhou Yuzong
        Vol. 11, Issue 3, (1989) DOI: 10.11835/j.issn.1674-4764.1989.03.011
        摘要：This paper studies the optimization on the position of bearing-points in space trusses supported by four columns,taking the cross-sectionalareas of members,the positions of bearing-points and heights of space trusses as the design variables,and the weight of structures as the objective function.After a lot of calculation,the parameters of optimal cantilever lengths and heights of space trusses supported by four columns are presented.  
          
        599
        |
        8
        |
        0
        <HTML>
        <DownloadPDF><Meta-XML>
        <引用本文> <批量引用> 44624833 false
        更新时间：2023-11-28
      • Guo Xianhu
        Vol. 11, Issue 3, (1989) DOI: 10.11835/j.issn.1674-4764.1989.03.012
        摘要：By introducing the span-to-height ratio,this paper deduces wo evaluating equations of shear strength of simple reinforced concrete beamwith stirrups and under uniform loads.This makes the shear stressing concept consistent with the evaluating equations,thus improves the evaluating equationsof shear strength of the New Code.Two equations are provided with auto-regulating function on shear strength for a cross section of beam.They aresimple and convenient in evaluation.The working time used for design is not increased and 10% of stirrups is economized in frequent conditions of span-to-height ratio.  
          
        504
        |
        9
        |
        0
        <HTML>
        <DownloadPDF><Meta-XML>
        <引用本文> <批量引用> 44625660 false
        更新时间：2023-11-28

      • KUHN-TUCKER SADDLE POINL THEOREM OF NONCONVEX PROGRAMMING ON HILBERT SPACE

        Pu Yun
        Vol. 11, Issue 3, (1989) DOI: 10.11835/j.issn.1674-4764.1989.03.013
          
        504
        |
        765
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 44625762 false
        更新时间：2023-11-28
      • Vol. 11, Issue 3, (1989) DOI: 10.11835/j.issn.1674-4764.1989.03.014
          
        441
        |
        8
        |
        0
        <HTML>
        <DownloadPDF><Meta-XML>
        <引用本文> <批量引用> 44625745 false
        更新时间：2023-11-28
      0