Liu Boquan Baishaoliang Lai Ming
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.001
Abstract:This paper Extensively discusses the current failure criteria for aseismic structures and points out the drawback. A method how to thoroughly study the failure criteria is presented.
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.002
Abstract:The climate in the region of the Yangtze River is sultry in summer and wet and cold in winter. The conventional building measures are shading in summer and insulating in winter,which have heen gotten some effects. Becasue the sultry,wet and cold sensation still affect, the indoor thermal environment can not get an ideal improvement. This paper shows that the new method by dehumidifying is the most effective and the most economic.
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.003
Abstract:This paper presents the style and features of Yinchuan with a long history and culture,and analyses the relations between protection of the city and the modernization of the city.
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.004
Abstract:According to the daily change law from curves for percentage insolation,this paper presents a new formula of the average insolation in the zones where the insolation is more than 70%. By means of the hourly observing data during two years for solar direct ratiation, cloudage and sunshine condition in seven zones different lighting climate,considering the vaper pressure and the altitude present the function of percentage insolation and the probability of four sky brightness classification,this formula has a certain precision to be proved by observation.
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.005
Abstract:A combination of extended transfer matrix and boundary element method is proposed for solving two dimentional statics problems of complicated nonhomogeneous structure. It is explained with the theory and the example. The method can get greater numerical accuray and shorten computation time in small amount of computer storage without getting involved with large matrices.
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.006
Abstract:During the citified course at present for construction of old mountain cities is very important. This paper has analyzed the following problems: the contradiction for construction of cities, style of mountain cities, reconstruction of city construction and reflecting the features of our age from cities.
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.007
Abstract:This paper presents a new approximate method for computation of an equivalent diameter of step beam. The comparison between the approximate and exact results shows that the method of this paper is suitable.
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.008
Abstract:本世纪六十年代以来,斜管沉淀作为一种固液分离技术广泛应用于水处理中。斜管沉淀效率(η)取决于斜管断面形状、尺寸、斜长、倾角、液面负荷、原水浊度及其反应后的絮体特性。大量的研究集中在斜管断面形状、尺寸、倾角、液面负荷和絮体特性对沉淀效率的影响,而对斜长的影响研究较少。本文着重研究斜管斜长对其沉淀效率的影响。试验结果表明:沉淀效率与斜长存在显著的指数函数关系,即η=1-A’·e~(Bl_0l(l+l_0)),这就是说,斜长(l)越大,效率(η)越高;同时也说明,当斜长(l)越小时,η随l的增加而增加较多,反之,当斜长(l)较大时,η随l的增加而增加较少。本文对斜管沉淀的设计,特别是对于在现有平流沉淀池和澄清池内增设斜管具有较大的参考意义。
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.009
Abstract:This paper discusses the optimum method of overall construction schedule in the view of systematization and analyszes the factors concerned with overall schedule. It provides a mathematical model of optimization the goal of best general economical benefit. A calculation programme for this model is drawn up and the operating procedures is told. This method overcomes the limitation of current optimum method,and provides construction mnagers a scientific tool in optimizing and adjusting overall construction schedule.
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.010
Abstract:The test and analysis results of model for the C6132 type lathe structure are introduced in this paper. Through recognizing the mode parameters and mode of vibration, the pernicious models are looked upon by the respond test analysis of random driver. The paper finally analysies the condition of the different order model frequencies in the vibration frequency spectrum for the tailstock and tool carrier during the different rotational speed.
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.011
Abstract:本文对某大型水电站采用强迫油循环风冷式水平送风的主变压器周围温度场进行了试验研究,并作了若干改型试验。结果表明;在夏季太阳辐射影响下,该电站主变冷却器进口管外空气温度相对于大气气温的温升为5.67℃.
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.012
Abstract:本文介绍一些研究者关于砼Ⅱ类断裂的试验结果,并从能量平衡角度进一步解释了砼Ⅰ、Ⅱ类断裂现象。本文还探讨了通过数值方法来模拟砼Ⅱ类断裂,进而采用数值手段分析了随一些因素变化砼Ⅰ、Ⅱ类断裂的转化。
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.013
Abstract:众所周知,连续函数列的极限函数不一定是连续的,这在理论与应用上均造成许多障碍。本文讨论了度量空间(X,d)到(Y,p)的连续函数,给出并证明了连续函数列的极限函数是连续函数的一个充分必要条件。
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.014
Abstract:本文在Banach空间利用函数的Frechet可微性,研究了不等式约束和混合约束问题的最优性条件。利用η-凸性,Slatcr条件推广了不等式约束问题的最优性必要条件,同时利用η-凸性讨论了最优性充分条件以及Lagrange对偶问题,得出Lagrange对偶问题与原问题最优值相等的结论。也在Banach空间讨论了等式约束问题的二阶必要条件。
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.015
Abstract:This paper introduces pressur-grouted little piles and analyses mainly a serious engineering accident of retaining wall built on a slip body in Sichuan. That is stabilized by the aid of pressur-grouted little pile and a good result is obtained.
Cao Dengxiang Zang Zixian Zhang Yumei
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.016
Abstract:Factors of affecting coal gasification mainly are the physical and chemical properties of coal gasified, the operation conditions of gasification process and the types of gasifiers etc. According to coal selection practice for Nanchuan town gas engineering, this paper describes the industrial test on gasification by mixed firing with Xishui coal and Nanchuan coal. The results of the test show that it is complete feasible to gasify by mixed firing at the ratio of Xishui cool the Nanchuan coal 6: 4.
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.017
Abstract:This paper introduces synthetically that the grade standard and relative indexes of hotel architecture formulation after 1978 in our country. As compared with the standard of hotel design of foreign country and measuring the practices of hotel building of late years in our country,the paper discusses the suitability of standard and indexes hotel design and consummates them further still for our country.
1993, 15(4). DOI: 10.11835/j.issn.1674-4764.1993.04.019
Abstract:This paper uses n nature numbers from 1 to n to form a numerical table of twofold maoic square' s necessary condition. It also proves that x>n(n-1) and the numerical table is the sufficient condition of the basic solution.
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