Xiao Weipin Dept.of Construction Management Engineering
1993, 15(3). DOI: 10.11835/j.issn.1674-4764.1993.03.001
Abstract:This paper disusses an important component part of the decision support sys- tem of science-technology management in building enterprises.It establishes the increasing degrees and dynamical productive fuctional model in building enterprises,and ayear contribultory models of investing labour and produtive fund,effect of profit-tax and productive total cost ect.
Qian Jueshi Chongqing Institute of Architecture & Engineering Wu Keru Tongji University
1993, 15(3). DOI: 10.11835/j.issn.1674-4764.1993.03.002
Abstract:This paper presents a fracture model of concrete,band damaging crack model (BDCM).The BDCM can be used to analyze mechanical behaviour of concrete effectively and easily.Compared with test results;numerical results calculated by the BDCM are very precise.
Liu Xiaoqing , Wu Huibi Dept.of Civil Engineering
1993, 15(3). DOI: 10.11835/j.issn.1674-4764.1993.03.004
Abstract:本文提出了高层半钢性连接钢框架二阶效应,包括P—△和P-δ效应的实用简化计算方法,该法便于手算。经验算本文的简化计算结果与精确的电算结果吻合甚好,其精度完全满足工程设计需要。本文对常见的五种高强螺栓梁柱连接的连接铡度进行了计算分析,给出了正常使用荷载下横梁线刚度和节点刚度比值的取值范围。本文还对半铡性连接以及P-△和P—δ效应对框架工作性能的影响进行了研究。
Chen Zhonglin , Xi Yucheng Dept.of Architecture
1993, 15(3). DOI: 10.11835/j.issn.1674-4764.1993.03.005
Abstract:This paper suggests that using best solar energy and advancing visual performance,a new evaluating method may be put that is about luminous environment.It not only recommends twelve parameters(targets),considering luminous environment and sky light climate but also luminary,heating,lowering temperature,psychology and physiology,ect.in accordance withyear's effect of daylighting.On the basis of different sky lighting climate areas and main uses of buildings.We use with a considerable weight factor that is satisfied with a basic function.Then by fuzzy multiple criterion,the distinct result about luminous environment in buildings is obtaoned.
1993, 15(3). DOI: 10.11835/j.issn.1674-4764.1993.03.007
Abstract:The management of the present building's firesafety is evaluated with one factor as the total building's loses of conflagation.It neglects the environmental factor.the mankind's productive activities,the factor of fire fighting management and the factor of remedial measure so that an evaluation of firesafety is made with different principles.In this paper,physical parameters show the idfferences in evaluation.Then a non-dimensional equivalent expression as objective function is obtained with the aid of dimensional method,which provides scientific bases for the evaluation of firesafety.
Zhang Changcai Dept.of Science Natural
1993, 15(3). DOI: 10.11835/j.issn.1674-4764.1993.03.008
Abstract:This paper presents the twofold magic square with a apparent characteristic.It can be changed into a series of new magic squares through changing the submatrix.
Zhang Zanxun , Wang Dongyun , Fu Linsen , Yao Jinshi Dept.of Civil Engineering
1993, 15(3). DOI: 10.11835/j.issn.1674-4764.1993.03.010
Abstract:An ancient grotto has been seriously weathered in Beishan,Dazu county.Sichuan province.This paper studies and discusses the hydrologic-geochemical reaction and weathered rock mass due to subsidence of acid rainwater and groundwater permeation.The researchingresults show that a main factor caused to destroy the shallow surface layer of rock is swelling of the sulphate crystal.
Luo Shushan Dept.of Architecture
1993, 15(3). DOI: 10.11835/j.issn.1674-4764.1993.03.011
Abstract:According to the significance of strategy concept study,the ecological environment should be protected.On the basis of the strategy of develoment and objective,this paper presents to build nests attracting anticipatorily and synchronously.
Fu Zhenhui Chongqing Architectural College Chen Qigao Chongqing Institute of Architecture , Engineering
1993, 15(3). DOI: 10.11835/j.issn.1674-4764.1993.03.012
Abstract:This paper studies and proves the function of air layer for moisture prevention based on the fundamental theories of heat and mass transfer in porous medium and in air layer and through contrastive model experiment. The result shows that the air infiltration will largely reduce the heat resistance of heat insulant.
Zhou Yinliang Dept.of Natural Science
1993, 15(3). DOI: 10.11835/j.issn.1674-4764.1993.03.013
Abstract:This paper presents the sufficient condition for a square matrix of order n to the twofold magic square,with which the twofold magic square of order 64 is constructed.It is tested by the computer.
Song Shouxiang Dept.of Mechanical , Electrical Engineering
1993, 15(3). DOI: 10.11835/j.issn.1674-4764.1993.03.015
Abstract:本文讨论了一种传统的自动称重系统的改进方案。即用机械手提起并传送被称物至称重装置处称重,代替了传统的传送带,以期减小传送系统的振动噪音对测量精度的影响。文中讨论了满足“软加载”要求的三自由度机械手臂部的运动轨迹及其数学模型,为理论上进一步分析研究提供了基础。
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