2005, 27(6):1-5. DOI: 10.11835/j.issn.1674-4764.2005.06.001
Abstract:Culture is a basic element in human settlement environment.In this paper,considering the characters of progress in China's urban development in different stages,the urban culture is studied in respect of the age and space,then the connotation and development of regional culture are discussed.Through comparing the growth of Chongqing and Hong Kong cities,this paper presents a new idea for the study on Chinese urban development of modern times from the view point of regional culture.
YAN Wen-Tao , XING Zhong , ZHANG Qing
2005, 27(6):6-11. DOI: 10.11835/j.issn.1674-4764.2005.06.002
Abstract:Along with the process of urbanization,the old-town renewal has become the top task in the city construction.Directed by quantitative analysis of city's economy,this paper puts forward a new conception and model of development capacity for old city renewal,established land class evaluation system and AHP model to determine the land class and its evaluation factors.Restricted by the old town's eco-environment and social environment,and targeted by its economy,this paper suggests that the upper limit model of the old city's development capacity should be decided by its eco-environment volume and social environment,and the lower limit model should be determined by the market economy,thus the renewal can see the economy,society and environment proceed orderly and harmoniously.Upon the platform of ARCGIS with considering Nanyang old town renewal planning and design,this paper has drawn a digital map for old town renewal development intensity,and explores tentatively the proper development capacity under the platform of GIS.
CAO Zheng-wei , YAN Bo , LI Jian-hua
2005, 27(6):12-16. DOI: 10.11835/j.issn.1674-4764.2005.06.003
Abstract:Philosophy of science led by Popper is one of the most important contemporary scientific and philosophic theories.In addition to the science,the philosophy of science impacted contemporary social science mostly,of which the false-feasibility,circumstantial logic,anti-historical determinism and anti-scientism influenced the orientation of contemporary architecture.Just with these factors of philosophy of science,this thesis reanalyzed and reviewed Chinese contemporary architectural forms,especially the tradition inheritance.
2005, 27(6):16-20. DOI: 10.11835/j.issn.1674-4764.2005.06.004
Abstract:The development mode of the folk dwellings landscape both at home and abroad is studied.The influence of the development of the folk buildings and dwellings landscape on the traditional architectural culture,the ecological environment quality and the tourism is analyzed.The sustainable development mode for the folk dwellings landscape is investigated.As a conclusion,it is suggested that the national culture and the ecological environment should be preserved in the development of the economy of folk dwellings tourism in West China and the whole country as well.
2005, 27(6):21-25. DOI: 10.11835/j.issn.1674-4764.2005.06.005
Abstract:Cliff-side Buddhist temple is the latest form of Buddhist cave temple.It is the result of a change from close cave space to open cliff-side space under the influence of Chinese civil culture and local architectural system.This article inquires the origin of the cliff-side Buddhist temple as well as its formation in Ba-Shu area considering its historical and cultural background.
CHEN Cong~ , LI Yi~ , LIANG Rui~
2005, 27(6):26-28. DOI: 10.11835/j.issn.1674-4764.2005.06.006
Abstract:The external thermal insulation is the key technology of building energy saving,however,the crack inevitably reduces its performances.Through basic analysis,this paper points out that the rebuilding of thermal field and the differences of material performance are the main reasons for cracking;furthermore,it proposes three principles to avoid crack;at the end,discusses the future development of external thermal insulation system.
2005, 27(6):29-32. DOI: 10.11835/j.issn.1674-4764.2005.06.007
Abstract:In this paper,the analytical solutions for an elastic rectangular thin plate with opposite boundary completely clamped support and others free were derived by a Symplectic geometry method.Due to the fact that the basic elasticity equations of the thin plate were only used,it was not necessary to select the deformation function arbitrarily.Therefore,the solutions in this paper are much more general mathematically.In order to prove the validity of the formulations,numericam results were presented to be compared with those derived by other references.
ZHOU Liang-hao , LIANG Shu-guo , LIU Ya-qi
2005, 27(6):33-38. DOI: 10.11835/j.issn.1674-4764.2005.06.008
Abstract:Now it is complex to calculate across-wind response of tapered high-rise structures with circular section abroad and its research at home is inadequate.Based on random vibration theory and across-wind force spectrum proposed by B.J.Vickery,a simplified formula on maximum across-wind response of tapered high-rise structures with circular section is achieved in this paper.With respect to engineering calculation,the results obtained by simplified method corresponds with those obtained by standard method based on the theory of random vibration well,but the prediction values by approximate method proposed by B.J.Vickery are smaller.
LUO Yun-ju , LIU Xin-rong , LIU Dong-yan
2005, 27(6):39-43. DOI: 10.11835/j.issn.1674-4764.2005.06.009
Abstract:The geothermal water of Nanwenquan,Xiaoquan and Qiaokouba is a whole geothermal water system in Nanwenquan anticline of Chongqing.In the past,due to lack of study on sustainable exploration of the geothermal water,the source of geothermal water from Nanwenquan and Xiaoquan was drying up.Now,three enterprises are exploiting the geothermal water in Qiaokouba.There must be a sustainable exploration for the geothermal water,in order to utilize and protect the geothermal water resource.The geothermal water in the three exploiter's areas was quantitatively studied on sustainable exploitation by finite element numerical simulation.The geological mode was generalized and the mathematical model was established.Then,the simulative water level obtained was compared with the actual one,and the mathematical model was identified and adjusted.The right mathematical model has been acquired when the simulative water level obtained was approximate to actual water level.The infiltration of geothermal water was simulated under two schemes of exploitation conditions.An optimum scheme has been obtained by analysis.The maximal yield of exploitation was acquired under sustainable exploitation of the geothermal.
ZHAO Jian-ping , ZHOU Feng , ZAI Jin-min , MEI Guo-xiong
2005, 27(6):44-48. DOI: 10.11835/j.issn.1674-4764.2005.06.010
Abstract:The prefabricated pile,driven in soft clay,can squeeze the soil laterally in a certain scope around the pile,and the void ratio is reduced significantly;consequently,the shear bearing capacity is raised.But the soil parameter,which is used to estimate the capacity of pile,is reduced according to the soil state before the pile was driven.Then,a certain difference appears when the pile is working.The calculation result usually is partial to conservative.This paper analyzes the squeezing mechanism of the pile using the theory of cylindrical cavities expansion.And a formula,which is used to estimate the increment of shear bearing capacity of soil around the pile when excess pore water pressure from pile driving distributes completely,is presented based on the unique relation between the shear bearing capacity and the density of the soil.This formula can be used to estimate the final ultimate-bearing capacity of the pile.The calculated results by the proposed formula are in good agreement with those of the site measurement.
QIN Shi-hong~ , LONG Xian-neng~ , LI Tang-ning~ , PI Tianxiang~
2005, 27(6):49-54. DOI: 10.11835/j.issn.1674-4764.2005.06.011
Abstract:Based on the project of a prestressed concrete beam-slab structure,this paper introduces the optimum design of a four-spanned exceedingly long prestressed floor. Different schemes,such as the scheme of the prestressed major beam,the scheme of the prestressed secondary beam with the same span and the scheme of the prestressed secondary beam with different spacing,are compared and analyzed in this paper.Meanwhile,various methods of the exceedingly treatment for long prestressed reinforcement are compared.Finally,based on two prestressed beams,the prestress loss,the prestressing value at the ends of the beam and the deflection in the midspan of the beam are detected during the tension and anchorage stage in order to verify the results of the theoretical analysis.
2005, 27(6):55-58. DOI: 10.11835/j.issn.1674-4764.2005.06.012
Abstract:In this paper,based on the geometric nonlinear behavior of cable structures,a finite element method with four-node isoparametric element was presented,the third order polynomial was used as displacement functions and initial curve of the element.By means of the principle of virtual work and the updated Lagrangian method,the authors derived the finite element equations,and solved them by Newton-Raphson method.The proposed model leads to high precision and can meet the engineering requirements.The model presented in this paper can be applied in the analysis of long-span tension structures,such as cable structures,cable domes and so forth.
2005, 27(6):59-62. DOI: 10.11835/j.issn.1674-4764.2005.06.013
Abstract:For light gauge steel floor,the structure testing and finite element method were applied to study the junior beam's inflection capability influenced by steel floor sheet.Analysis results show that the thin steel floor sheet affects junior beam's deflection very strongly.This conclusion has value for design of new structure or evaluating load support capability to the steel floors.
WANG Tao , ZHAO Na , DENG Rong-seng , NIE Zhuo-na , MAI Song-bing
2005, 27(6):62-66. DOI: 10.11835/j.issn.1674-4764.2005.06.014
Abstract:A multi-loop reactor is constructed based on analysis of temporal and spatial character of several continuous current nitrogen and phosphorus removal process in this paper.Through cross experiment design,the important factors to influence the effect of the nitrogen and phosphorus removing under low carbon-resource condition were found,and the feasible control parameters of the biological nitrogen and phosphorus removal process under low carbon-resource condition were put forward.The results are valuable for design and operation of wastewater treatment process with similar conditions.
CAI Jin-bang~ , ZHU Liang~ , DUAN Xiang-bao~
2005, 27(6):67-70. DOI: 10.11835/j.issn.1674-4764.2005.06.015
Abstract:In this paper,the flow velocity fields,suspended solids concentration fields and flow-through curves in rectangular sedimentation tanks with different reaction baffles location,inlet horizontal velocity and length height ratio are simulated in detail using a developed mathematical model given in Reference 2.According to the numerical results,the influence of different reaction baffles location,inlet horizontal velocity and length height ratio on the operating efficiency is analyzed.Finally,the rational reaction baffles location,inlet horizontal velocity and length height ratio are presented.
2005, 27(6):71-75. DOI: 10.11835/j.issn.1674-4764.2005.06.016
Abstract:研究了在不同容积负荷下(0.47kgCOD/(m3.d)、1.68kgCOD/(m3.d)、3.36kgCOD/(m3.d))一体式膜生物反应器中好氧颗粒污泥的形成、性质以及对于生活污水中的COD及氮的去除效果并对其形成机理进行了探讨。通过扫描电镜的观察,可以将此好氧颗粒污泥看成是以丝状菌为骨架,胞外聚合物为“粘合剂”的微生物聚集体。
LONG En-shen , MA Xiao-fei , WANG Liang , ZHAO Jian-hui , CUI Tian , JIANG Lin
2005, 27(6):76-79. DOI: 10.11835/j.issn.1674-4764.2005.06.017
Abstract:The transporting unit is one of the indispensable facilities in the biomass pyrolytic liquefaction system and the continuous and steady transporting characteristic is the key to ensure the process of biomass pyrolytic liquefaction.This paper introduces one biomass transporting system adopted in the experiment;taking sawdust,paddy shell, wheat hull and corn grain with different grain diameters as the representative materials,the influence law of various factors on transportation capacity is studied in this paper.The research results obtained can offer an important reference for realizing a continuous and reliable biomass pyrolytic liquefaction process.
FAN Ya-ming , FU Xiang-zhao , WANG Yong , LONG En-shen , OUYANG Xiao-guang
2005, 27(6):80-84. DOI: 10.11835/j.issn.1674-4764.2005.06.018
Abstract:The residential area studied in this paper is situated on the special borderland between Beibei town and Jinyun Mountain,which is a national beauty spot and natural conservation region.In order to conserve the ecological environment of JinYun Mountain,prevent the excessive development,and promote sustainable progress of the residential area,it is suggested in this article that an ecological sustainable residential area should be designed for this area. Then this paper puts emphasis on the design strategies in following three parts:(i) protecting ecological environment,(ii) providing healthy building environment,and(iii) enhancing building energy efficiency.
2005, 27(6):85-88. DOI: 10.11835/j.issn.1674-4764.2005.06.019
Abstract:依据二相厌氧的理论,设计并启动酸化反应器,用啤酒废水处理的厌氧活性污泥接种驯化,采用化学法与容积负荷控制相结合的方法进行反应器的启动实验,实验中测得各阶段COD的变化及COD的去除效率。得到了二相厌氧反应器分相启动的方法和基本条件。从实验结果可以看出:在pH值4.5~6.0,温度在27±2℃;有机负荷从1 kg/m3.d~10 kg/m3.d缓慢增加的条件下,厌氧产酸反应器的启动比较容易。利用色谱-质谱联动仪分析厌氧产酸反应器进出水质的特性。结果表明:经厌氧酸化反应后,有机物的种类没有减少,相反增加了许多小分子的水解、酸化反应的中间产物,产酸反应器将大分子难降解化合物降解为易降解的酸性小分子化合物,可生化性有所提高。
2005, 27(6):88-91. DOI: 10.11835/j.issn.1674-4764.2005.06.020
Abstract:The fire plan aiming to create the fire security environment for the development of the city,is an important part of the modern city plan.This article reviews the experience of the fire plan of compilation Chongqing city,discusses its frame,and summarizes its notable effect on the construction of the public fire infrastructure.Some advices on how to improve the urban fire plan is also put forward in this article.
CHEN Hao~ , LI Shi-liu~ , HUANG Yan-Ling~ , CHEN Jin~
2005, 27(6):92-96. DOI: 10.11835/j.issn.1674-4764.2005.06.021
Abstract:In this paper the working principle and performance character of both the manual and automatic Vicat apparatuses in existence are compared and analyzed,and their existing weakness and the urgent problem to be solved are pointed out.On this basis,adopting the technology of mechatronics and modern sensors,a new sort of full automatic Vicat apparatus that can fully satisfy the national standard in testing the setting time of the cement has been developed.This apparatus can be operated expediently with high precision,the test results are to be analyzed and computed automatically.This paper presents the working principle,performance character,key technology and prospect of application for the full automatic Vicat apparatus.
YIN Qiang , CHEN Shi-jiao , JI Manzhong
2005, 27(6):97-100. DOI: 10.11835/j.issn.1674-4764.2005.06.022
Abstract:In this paper,a complete dynamic model of the tower crane is set up by the finite element software ANSYS and then the QTZ25 tower crane model is calculated.Through comparing the results,the feasibility of this method is proven.This method is a new approach to fast and precise analysis on dynamical model of tower crane structure.
2005, 27(6):101-104. DOI: 10.11835/j.issn.1674-4764.2005.06.023
Abstract:随着数据库技术应用的不断深入,多种数据库在不同领域的优势各有千秋。如何实现异型数据库平台之间快捷方便的数据提取?这是众多数据库管理和维护人员所关注的问题。以MSSQL的数据转出为Anywhere的数据为例,利用可视化开发工具POWERBUILDER提供的数据管道技术,讨论了异型数据库平台之间快捷方便的数据导入导出方法。
WANG Da-en , XU Guang-chen , WANG Qi-xing
2005, 27(6):105-108. DOI: 10.11835/j.issn.1674-4764.2005.06.024
Abstract:It is one of the pivotal technology that mutually exclusive operation is in the system structural design of the parallel processing to solve resource conflict.Traditionally,the sharer resource mutually exclusive operation is managed by single-computer operation system time-sharing mode for multitask condition,but all of parallel nodes possess renovate right in multi-mode OS,so high-grade lock mechanism is a pivotal technology to solve share resource confilict in parallel process to prevent share resource accessing conflict.This article describes lock control arithmetic of mutually exclusive operation from system structure and puts forward mutually exclusive operation model based on NODS.
2005, 27(6):109-112. DOI: 10.11835/j.issn.1674-4764.2005.06.025
Abstract:Combined with the development flow of real estate project,firstly a flow analysis is put forward for land investment risk identification of real estate projects,then by method of list analysis and method of expectancy computing to determine the risk level and the gain and loss of expectancy of land investment.Based on the relation and flow chart of land investment risk,the risk intensity of land investment is computed,in order to achieve an objective,effective and scientific dynamic management of land investment risk.
2005, 27(6):113-116. DOI: 10.11835/j.issn.1674-4764.2005.06.026
Abstract:Under the asymmetric information,the owner undertakes moral risk,which is caused by supervisor in the case of project supervision.This paper analyzes the benefit conflict while entrusting because of asymmetric information,discusses how to bring incentive and supervisory control mechanism into project supervision entrust-contract by mathematics model.Then,the design and improvement of the supervision reward in contract are discussed.
2005, 27(6):117-121. DOI: 10.11835/j.issn.1674-4764.2005.06.027
Abstract:Although the commercial real estate in our country has made a great progress in these years,the vacancy rate is very high.It is not only a loss to the developer,but also a waste to the social resources.As keen competition between the commercial real estate developers is on coming,the market orientation will be decisive.The Analytic Hierarchy Process(or AHP) is a qualitative and quantitative analysis method,the application of which to the business orientation can make our item more easily to succeed.In this paper,the AHP is applied to the market orientation of an item in Shenzhen.It is hoped that this will contribute to raising the decision accuracy,by formatting pair wise comparative matrixes according to the rate of contribution the variant factors applied to the target.
2005, 27(6):121-126. DOI: 10.11835/j.issn.1674-4764.2005.06.028
Abstract:This paper combined the method of probability,mathematical statistics,and technology of computer with theory of Project cost risk management,based on the theory of initiative control and took the Crystal Ball as an assistant tool to analyze the risk of cost management in a certain project,verify the actual effect of the model when it is used to the practice,give some suggestions to evade risk in a certain degree and mend the existent decision model to improve the efficiency and precision of analysis of cost management risk.
2005, 27(6):127-130. DOI: 10.11835/j.issn.1674-4764.2005.06.029
Abstract:Based on the theory of value chain,this paper explained the constitution of the value chain and the important function of channels in Real Estate sale promotion.Furthermore,it analyzed the erroneous ideas about the present management of the channels for sale promotion systematically.And for the lower-cost and high-efficiency purpose,it puts forward the viewpoint that channels should be established and integrated based upon the value chain theory,moreover,the key point in the process was discussed.
2005, 27(6):130-135. DOI: 10.11835/j.issn.1674-4764.2005.06.030
Abstract:The establishment of the administrative litigation of public environmental welfare is a great necessity.It benefits to make up the limitation of traditional chain of command,to ensure the environmental right of citizen and to accommodate the need of international environment protection.The administrative litigation of public environmental welfare is that the plaintiff including the people's Procuratorate,citizen,corporation and other organizations can sue administrative organ who harms or will harm the environment. China may establish its own administrative litigation public environmental welfare through the following creative construction system,such as exerting the function of the people's Procuratorate,proper setting of lawsuit domination,increasing new kinds of judgment,etc.
2005, 27(6):136-141. DOI: 10.11835/j.issn.1674-4764.2005.06.031
Abstract:This paper briefly describes elasticity theory with different moduli and research progress in recent twenty years,analyzes computational results respectively from these two theories to all kinds of engineering structures and concludes that applying different moduli theory to solve some engineering components conforms to the real mechanics performance.This paper also deals with the differences between analytical solution and numerical one.Though finite element method is an effective measure to solve these nonlinear problems,seeking analytical solutions is still a difficulty and goal for some problems.
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