1997, 19(6):1-6. DOI: 10.11835/j.issn.1674-4764.1997.06.001
Abstract:Multistorey and highrise buildings with PPC carry-over girder of long span have merits of small desorm and saving steels ,as shocon by full scale test in the field.In this paper. simplified solution using framed tube-corestructure principle is presented.It provides a new scheme of buiding structure and valuable design data.
1997, 19(6):7-14. DOI: 10.11835/j.issn.1674-4764.1997.06.002
Abstract:This paper discusses practical methods of investment risk analysis at a construction project,applying the Xifang Economics Principle and the Mathematical statistics etc, It has reference value for improving the Feasibility Research(FR)and Investment Decisions.
1997, 19(6):15-21. DOI: 10.11835/j.issn.1674-4764.1997.06.003
Abstract:Concerning the existent and latent risk in building,operating and transfering of BOT project, the model of BOT risk is advanced in AHP way, and on the basis of sinqle target and the importance of the weiqht of each index affecting,the policy in the risk of the BOT project is made by the use of the method.
1997, 19(6):22-27. DOI: 10.11835/j.issn.1674-4764.1997.06.004
Abstract:A new type of tube settler with rectangular cross-section and vertical adhesive interface in the tube module is proposed.The tube module by this kind of tube settler has flat top and bottom faces.Experiments show that the tube settler with rectangular vross-section and vertical adhesive interface has the advantages of better sedimentation performance,less material censumption for its construction and no flow transitional section from turbulent flow to laminar flow in the inlet part of the tube of which the whole length takes part in solid-liquid separation.
1997, 19(6):28-34. DOI: 10.11835/j.issn.1674-4764.1997.06.005
Abstract:This paper presents properties.advantages and useable rane of polyethylene pipe in City Gas Engineering.
1997, 19(6):35-41. DOI: 10.11835/j.issn.1674-4764.1997.06.006
Abstract:The thesis studies the cooling method using the porous-moist material covering on exterior surface by the passive solar evaporation.The mathematical Model for the process of heat and moisture transfer based on the moist-porous material under passive solar vaporization cooling is established. Through theoretical analysis.computer simulation and test measurement in situ, all results show the law of the thermal process. It is said that this method is feasible.
1997, 19(6):42-46. DOI: 10.11835/j.issn.1674-4764.1997.06.007
Abstract:Guan Zhong was an outstanding statesman and thinker in the early ages of the Spring and Autumn Period.His masterpiece,Guan Zi,gave a detailed illustration on his thoughts.By enganing in the study of Guan Zi,I would like to introduce my views on Guan Zhong's thoughts of city construction, which include city function, classification. density, selection of site, form,arrangement, flood prevention etc.In the article, it is clearly shown that Guan Zhong was the first person who expounded the theory of city construction scientifically and systematically in the history, and made a big contribution to the city construction of ancient China.Guan Zhong was the master of ancient Chinese city planning and construction.
1997, 19(6):47-51. DOI: 10.11835/j.issn.1674-4764.1997.06.008
Abstract:This paper discusses the necessity and significance of developing the extra fine-complex sway jaw crusher.It should be pointed out that you wlill have a success if you adopt the methods of the optimization design.Also it recommends the methods, steps and flow chart of the optimization design of the extra fine-complex sway jaw crusher.And it discusses the grading charts of the particulate products crushed by these two kinds of the etra fine-complex sway jaw crushers developed.
1997, 19(6):58-62. DOI: 10.11835/j.issn.1674-4764.1997.06.010
Abstract:In this paper,in terms of the measured data(including the deflection and slope at the ground surface of the pile,the maximum bending moment and its position),the biparameter method is used to analyze the pile-soil parameters.Two examples show that the method in present paper is reasonable and reliable,and it provides the reference value for the engineering design.
1997, 19(6):63-68. DOI: 10.11835/j.issn.1674-4764.1997.06.011
Abstract:对聚铁聚铝预处理城市污水正交试验研究,确定其最佳工作条件,当SS去除率为60% ̄80%,COD支除率为50 ̄70%时,PAC和PFS的投药量分别为:≥30mg/L和≥100mg/L,其沉淀时间分别为:≥10min和≥45min。
1997, 19(6):67-73. DOI: 10.11835/j.issn.1674-4764.1997.06.012
Abstract:This paper recommends a method of lowering the ground water table by setting up the horizontal drains in hill slopes.Based on the finite element analysis, the method advances the experiential formulation about the downstream water depth of the horizontal drains and the distance between the horizontal drains. The experimental result seems to agree reasonably well with the expression.So, in engineering practices,the formulation can be used to predict the amount of lowering of the downstream water depth, and also to confirm the distance between the horizontal drains.
1997, 19(6):74-78107. DOI: 10.11835/j.issn.1674-4764.1997.06.013
Abstract:This paper deals with regulator series correction CAD, and gives out corresponding CAD program and a real design example. It has some real significance for regulator series correction.
1997, 19(6):79-85. DOI: 10.11835/j.issn.1674-4764.1997.06.014
Abstract:The quality of construction engineering has been emphasized more and more.In this paper,authors set up a practical,operative three_stage AHP model to give quantitative analyses of the determinations of quality of construction engineering.From the point of view of both theory and practice,it is proved that this approach has feasibility and practical value.
1997, 19(6):86-92. DOI: 10.11835/j.issn.1674-4764.1997.06.015
Abstract:This paper expounds the engineering significance of deliberating a method of approximate calculation,and has a discussion on lateral deflection of frame and frame_shear wall structures.
1997, 19(6):93-97. DOI: 10.11835/j.issn.1674-4764.1997.06.016
Abstract:在经济系统中经济采用的基尼系数,仅仅综合地、定量地描述了居收入的差异程度。本文进一步探索了这种差异的合理性程度。以有利于经济发展并兼顾社会公平为准绳,通过对罗伦兹曲线的数理分析,应用模糊数学方法,建立了一个求居收收入差异合理度的数学模型。
1997, 19(6):108-112. DOI: 10.11835/j.issn.1674-4764.1997.06.019
Abstract:Based on analyses and studies on basic knowledges such as expert system,engineering database and language,a model frame of Expert Decision Design System EDDS is built up,which consists of expert system as the main component.An example of EDDS application in aseismic building structure type choosing is presented,while its feasibility and advantages are demonstrated simultaneously.
1997, 19(6):113-115121. DOI: 10.11835/j.issn.1674-4764.1997.06.020
Abstract:In this paper,through the analysis of the engineering quality accident of the top circle beam in a certain big wineshop,a mechanical model of the reinforced concrete circle beam is proposed.By calculation and analysis,the reason of cracking in the circle beam support was found out,and the correct calculated result was made out,so that the engineering quality accident was timety treated.
1997, 19(6):116-121. DOI: 10.11835/j.issn.1674-4764.1997.06.021
Abstract:A review on environment-monitoring biosensors is presented.During recent years,various environment-monitoring biosensors are fast developed.They are applied to various areas,such as aquatic environment,atmosphere environment et al.The developing trend of environment_monitoring biosensors is also discussed.
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