1999, 21(4):1. DOI: 10.11835/j.issn.1674-4764.1999.04.001
Abstract:In this paper the necessity and urgency of reforming the operating mechanism of building market are discussed.It suggests that the improvement of quality of builing engineering in China can be ensured in aspects of system and operating mechanism only through the reforms in responsibility mechanism, competition mechanism,supply and demand mechanism,price mechanism,security mechanism and supervision and control mechanism.
1999, 21(4):6-12. DOI: 10.11835/j.issn.1674-4764.1999.04.002
Abstract:This article investigates into the basis of positive assets realignment from the aspects of mathematical models and their limitations.The objectives of the research is taking advantage of the basic and special mathematical models in assets realignnment practices in order to make assets realignment decisions quantitatively and scientifically.
1999, 21(4):13-15. DOI: 10.11835/j.issn.1674-4764.1999.04.003
Abstract:According to the analysis of technology and economy about the gas supply with the medium pressure in gas pipeline network of urban gas transmission and distribution system,a more economical and feasible pressure value is obtained.
1999, 21(4):16. DOI: 10.11835/j.issn.1674-4764.1999.04.004
Abstract:市政公用设施配套费的征收,应该兼顾效率与公平,并与商品房建设、销售协调、采用“从量从价两次征收法”,即先按使用土地的等级和面积“从量”征收一部分,再按建成房屋的售价“从价”征收另一部分。
1999, 21(4):19-23. DOI: 10.11835/j.issn.1674-4764.1999.04.005
Abstract:This paper presents several regular smoke control methods in atrium buildings and analyses the factors that determine the smoke production rate of fire in atrium and balcony.As a result,eight designs of smoke control system are developed.
FENG Ya , YANG Hong , CHEN Qi_gao
1999, 21(4):24-28. DOI: 10.11835/j.issn.1674-4764.1999.04.006
Abstract:This paper gives some analyses on the indoor climate and air quality in Chinese traditional quadral yard Buildings.A conclusion has been drawn that the living environment created by quadral yard building is of high quality.This kind of building is of great referential value in building human settlment environment with sustainable developmenlt and can also help to creat a better architectural form fitted in with the natural environment.
1999, 21(4):29-34. DOI: 10.11835/j.issn.1674-4764.1999.04.007
Abstract:通过等温导热仪对中性钠盐碱矿渣水泥水化热的测定, 研究了中性钠盐碱矿渣水泥的水化历程, 探讨了其水化动力学参数, 指出水泥水化速度常数具有“即时性”, 确立了中性钠盐碱矿渣水泥不同水化阶段时活化能的计算方法, 明确了各水化阶段水化机理的特征。
WANG Hou_hua , TAN Shun_min , JIANG Chun
1999, 21(4):35-39. DOI: 10.11835/j.issn.1674-4764.1999.04.008
Abstract:提出了三种矩形平翅片的几何变形片, 以矩形平翅片管作为比较对象, 在吸风式直流风洞中进行了开口( 孔) 侧背风等六种方案的空气外掠单排翅片管的对比性实验研究,得到了具有实用价值的结论。实验证实:在最窄截面风速 Umax = 3 ~9 m/s 的范围内,b型翅片管在孔侧迎风时, 平均当量换热系数比平翅片管提高了13 .4 % ; 孔侧背风时, 提高了11 % ,是三种片型中的最优形状。该片型是一种换热性能优异,具有深入研究价值的片型。
1999, 21(4):40-44. DOI: 10.11835/j.issn.1674-4764.1999.04.009
Abstract:With rapid development of the civil\institutional\commercial central air conditioning system,the energy consumption problem becomes serious.From the view point of operation and management,this paper provides some measures to save energy through choosing suitable cooling and heating equipments,air handling units,terminal units or designing a better water system.
CHEN Qi_gao FU Zheng_hui DONG Zi_zhong LIU Cai_feng
1999, 21(4):45-49. DOI: 10.11835/j.issn.1674-4764.1999.04.010
Abstract:This paper is attempted to solve the problem of contradiction of building energy efficiency with indoor air quality.Quadrangle has the character of improving indoor air quality,since it always refreshes air intelligently.The courtyard has a long air column covering over the courtyard and the insulation of such a thick air layer can resist heat loss.As oxygen from outer space enters the courtyard,the energy can be recovered by oxygen.So,the contradiction of building energy efficiency with indoor air quality can be solved.The indoor air quality can be improved by the quadrangle combined with solar houses.
1999, 21(4):50-54. DOI: 10.11835/j.issn.1674-4764.1999.04.011
Abstract:The modified alumina cement is a low alkaline cement with good durability.By means of atomic absorb spectrum,as well as the results of macro_experiment,the mechanism of hydration,hardening and modification principle are studied.
1999, 21(4):55-60. DOI: 10.11835/j.issn.1674-4764.1999.04.012
Abstract:This paper summarized the necessities of mitigating radon inside buildings, the main way by which radon goes indoors, the principles of preventing and mitigating radon when low buildings are erected and the methods of rating the addresses of buildings. It gave a minute introduction of the methods or rules of mitigating radon in the process of designing and constructing low buildings in America. It also introduced at some length the research about the methods of mitigating radon inside the buildings which are fit for the condition of our country.
FU Bin ZHANG Qin CHENG Jian_ling ZHANG Jian_gao
1999, 21(4):61-64. DOI: 10.11835/j.issn.1674-4764.1999.04.013
Abstract:According to the features of CAD for building water supply and drainage design,the interactive method for CAD calculation and drawing in building water supply and drainage engineering are discussed . A practical example of ADS for hydraulic calculation has been given in this paper .
CHEN Zhong_lin WANG Ai_ying GUO Ping
1999, 21(4):65-68. DOI: 10.11835/j.issn.1674-4764.1999.04.014
Abstract:In this paper,the artificial neural network theory is applied to indoor lighting design,the lighting design is combined with lighting calculation, which is fairly quick and reasonable.Furthermore this lighting design method is characterized by self_fitting and self_studying.
CHEN Xi_chang , ZHENG Sheng_qing , DENG An_fu
1999, 21(4):69-76. DOI: 10.11835/j.issn.1674-4764.1999.04.015
Abstract:In accordance with the behaviours of thick plates under the in-plane and transversal loadings,and introducing the concept of equivalent load, the coupled equations for the problem have been deduced with the theory of BEM in this paper.Thus a new method is presented for solving the problems of interaction of superstructure and foundation and subsoil,as well as for the problems of the thick plates under the complicated loadings.
1999, 21(4):77. DOI: 10.11835/j.issn.1674-4764.1999.04.016
Abstract:On the basis of analysing the defaults occuring in normal design,a new method of optimum design for individual foundation is put forward in this paper.This method can solve some problems successfully such as the strengh and deformation can be considered at the same time,which cannot be done in the current specification.The optimal mathematical models of individual foundation design and the bottom surface dimension design under eccentric load are derived.The optimal solution is decided by method of optimization and the method selected is penalty function and complex method, and the programs of optimum algorithm have been compiled and design and drawing of individual foundation have been completed. The final result suggests that a fair-sized economic efficiency can be obtained by using optimum method for foundation design.
1999, 21(4):87-90. DOI: 10.11835/j.issn.1674-4764.1999.04.018
Abstract:The problems and their causations of real estate management in our country are analysed and four countermeasures are presented in this paper. It is hoped to advance quality and level of real estate management in our country and to promote healthy development and positive circulation of real estate industry.
ZHENG Huai_li YUAN Zhong_xuan ZHENG Ze_gen
1999, 21(4):91-95. DOI: 10.11835/j.issn.1674-4764.1999.04.019
Abstract:The present status of water environment in three gorges area of Yangtze River is analyzed in this paper.The importance to enhance water environment protection and ecology environment protection in Three Gorges area of Yangtze River is also discussed in this paper. Some suggestions about water environment protection and ecology environment protection in Three Gorges of Yangtze River are also provided . Finally, the environment constructional targets to let clear water mirror on Three Gorges area of Yangtze River again are put forward.
1999, 21(4):96-97. DOI: 10.11835/j.issn.1674-4764.1999.04.020
Abstract:This paper proposes a drafting method for solving the intersection between circular elbow and elliptical conic pipe,which remains to be solved up to now and has not been mentioned in any textbooks.
1999, 21(4):98-101105. DOI: 10.11835/j.issn.1674-4764.1999.04.021
Abstract:In this paper,based on reference a method to solve the problem with equality constraints is given.A new approach for solving these problems is obtained,the number of dimensions of corresponding system or equations is less than that of the classic Lagrangian multiplier approximation.Using nonlinear equality constraints,the approximate algorithm is obtained.Moreover,the numerical difficulty is reduced by means of the new algorithm.
1999, 21(4):102-105. DOI: 10.11835/j.issn.1674-4764.1999.04.022
Abstract:This paper discusses some questions about the profile line of space geometry,such as the judgement of the parallelism of the two profile lines with the same directions and the visibility about the skew lines and the reappeared points of profile lines, which make the solution of some questions in space geometry more easy than those commonly used.
LIU Xian_ying , HU Ming_ming , WEI Tang_di
1999, 21(4):106-111. DOI: 10.11835/j.issn.1674-4764.1999.04.023
Abstract:This paper introduces the current status and development of modeling of the underground heat exchanger for a GSHP and several typical models used abroad are provided in details.
1999, 21(4):117-122. DOI: 10.11835/j.issn.1674-4764.1999.04.025
Abstract:Taking the abnormal crevice in the bearing cross-wall of a students'dormitory as an example,this article deals with the description of the phenomena, features and harm of the crevice, its main causes being the temperature stress are analysed and proved, and further explanation of the problems concerned are given. Also, this article offers a reference for the design, construction and managing personnel for handling analogous problems.
1999, 21(4):123-127. DOI: 10.11835/j.issn.1674-4764.1999.04.026
Abstract:This thesis expounds the main content and the attentive problems of the supervision of glass curtiain wall during preparing stage of construction.construction stage and completion and acceptance stage,and puts forward some advices to ensure the work quality.Key Words glass curtain wall; project quality; supervision
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