最新刊期
      卷 14 ， 期 1 ， 1992
      • Hong Changyin Dept.of Mechanical and Electrical Engineering
        Vol. 14, Issue 1, (1992) DOI: 10.11835/j.issn.1674-4764.1992.01.001
        摘要：This paper introduces the calculating methods of bucketteeth position,specific operating sizes and respective lengths of 3 setsof hydraulic cylinders by coordinate transformation,establishes themathematical models of digging path enveloping curve and presents thecalculatinig method of the enveloping drawing area.In the meantime,example is given.  
          
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      • Li Heping, Zheng Zegen The Analytical and Thesting Centre
        Vol. 14, Issue 1, (1992) DOI: 10.11835/j.issn.1674-4764.1992.01.003
          
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      • Chen Chun, Fan Xingyi, Chen Shanlin Department of Civil Engineering
        Vol. 14, Issue 1, (1992) DOI: 10.11835/j.issn.1674-4764.1992.01.004
        摘要：In this paper,the axisymmetrical shells of suspension crosssection is studied by means of integral equation in initial parameter form.An example of the shells under uniformly distributed load is calculated.  
          
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      • ON GRACEFUL GRAPHS:CYLES WITH MANY CHORD GRAPHS

        Peng Taihua Department of Natural Science
        Vol. 14, Issue 1, (1992) DOI: 10.11835/j.issn.1674-4764.1992.01.006
          
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      • THE CONSTRUCTION OF SQUARE MAGIC SQUARE AND TWOFOLD MAGIC SQUARE

        Zhang Jinzhu Hubei Huanggang Teachers College
        Vol. 14, Issue 1, (1992) DOI: 10.11835/j.issn.1674-4764.1992.01.007
        摘要：This paper presents a construction method of square magicsquare and twofold magic square,and describes how to change the cons-truction into a pair of magic square Latin squares.As soon as a pair ofmagic square is constructed,the square and twofold magic square can bewritten.Then the number of the same order twofold magic square willbe infinite if it exists.  
          
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      • ADAPTIVE MOMENT-ROTATION FUNCTIONS FOR SEMIRIGID STEEL FRAMES

        Vol. 14, Issue 1, (1992) DOI: 10.11835/j.issn.1674-4764.1992.01.008
          
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      • Zheng Huaili Department of Natural Science
        Vol. 14, Issue 1, (1992) DOI: 10.11835/j.issn.1674-4764.1992.01.009
          
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      • Vol. 14, Issue 1, (1992) DOI: 10.11835/j.issn.1674-4764.1992.01.010
        摘要：In order to probe into the shear resistant behaviors ofsteel reinforced concrete(SRC)restrained beams,three test beams underconcentrated loads have been tested.A full range analysis of the testbeams is conducted by using nonlinear finite element(NLFE)techique,and a good agreement with the experimental results is achieved.Theshear resistant mechanism of SRC restrained beam and the main factorsaffecting its shear strength are analysed.It is found that when theavailable shear strength formula for simply supported SRC beams is usedto calculate the shear strength of SRC restrained beams,the result turnsout to be conservative,so it is suggested that the shear strength of SRCrestrained beam could be calculated by the corresponding formula ofsimply supported SRC beam,adopting calculation shear span ratio.Thepractical formula is proposed in the paper.  
          
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      • ASSEMBLY FOUNDATION OF EROSION PROTECTION

        Zhang Chenghai Department of Adult Education
        Vol. 14, Issue 1, (1992) DOI: 10.11835/j.issn.1674-4764.1992.01.011
        摘要：In this paper,the structure of assembly foundation oferosion protection,its design and construction procedure are studied.Itis the development of double wall steel open caisson and reinforcedconcrete open caisson.Based on the data collected in tests,some difficultproblems about the principle of expanding foundation erosion prote-ction in deep water and construction methods are resolved.Comparedwith other foundations,the assembly foundation narated in this papercan decrease the time limit and construction cost of a project.Themethod may de better for solving the problem of bridge foundation indeep water.  
          
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      • Wang Bingle, Zhou Shouguang, Song Liquan, Yu Zhigang Dept.of Mechanical and Electrical Engineering
        Vol. 14, Issue 1, (1992) DOI: 10.11835/j.issn.1674-4764.1992.01.012
        摘要：This paper is one of the achievements of the researchitem for computer-aided design of tower crane's steel structure.In thepaper,taking the well-base structure as an example,first the method establishing the mechanical model is explained for the base structure ofa movable tower crane.Then the math model of its optimal design andthe N-S figures for the computer program is described and calculatedusing discrete optimal technology.Finally the problems related to thedesign for the base structure of a movable tower crane are briefly illu-strated.  
          
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      • Wang Qi Department of Natural Science
        Vol. 14, Issue 1, (1992) DOI: 10.11835/j.issn.1674-4764.1992.01.013
        摘要：In this paper,by the use of Farkas lemma and its inve-rse proposition,the generalized Kuhu-Tuoker conditions for the existanceof strong minimum point in differential multiobjective programming inBanach spaces and the existance of sufficient condition of weak Paretominimum Foint are derived.  
          
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      • A NEWFANGLED NORMATIVE FORM FOR SINGLE EIGENVALUE SYSTEMS

        Wang Jifeng Dept.of Mechanical and Electrical Engineering
        Vol. 14, Issue 1, (1992) DOI: 10.11835/j.issn.1674-4764.1992.01.014
          
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