最新刊期
卷 27 ， 期 3 ， 2005
- 摘要：Urban land -use is closely related to urban development. A new trend and some problems in urban land- use appeared along with accelerated urbanization in China. The trend characterized with a large in- crease in the amount of urban land demand, the rise of the ratio of urban common land to total urban area and the elevation of urban land income. The problems mostly included a severe conflict between supply and demand of urban land, extensive land - use, a weak market - force in urban land resources allocation. Based on above analysis, the optimization countermeasures, which included intensive land - use, land - use structure optimization, exploitation of leave unused land in cities, and land - market construction, were put forward for promoting rational utilization of urban land and sustainable development of urban economy.768|6|0更新时间：2023-11-28
- 摘要：By review of region study in recent development of history science, geography and Sciences of Human Settlements, this paper points out that material collecting without interrelated analyzing as well as focusing on main question and assumption without enough argumentation are main problems in this field now. The method renovation & combination with related subjects are discussed, this paper concludes that strengthen interdisciplinary study with Geography is a key issue in the future development of region study in Sciences of Human Settlements and possible approach to "technical development' and "humanity concern'.688|971|0更新时间：2023-11-28
- 摘要：The modernization has been the dream that Chinese nation has wished eagerly to realize all the time. In some sense, the modernization of China means urbanization. The reform and opening - up over the past 20 years , built and made the enormous achievement in urbanization of China, have changed the appearance of the city of China greatly. But to numerous traditional historical zones, what kind of urbanization way should on earth be taken, it has been the question long - term in dispute of the planning circles all the time. In this paper, Ciqikou community of Chongqing as an example, doing some discussions from sociology on this question, the author hopes, that for such difficult problem, by this settlement a piece of breach can be found as soon as possible.626|1025|0更新时间：2023-11-28
- 摘要：With the attention to the comfort degree of living environment, the phenomenon of making use of the PMV -PPD index within the ISO7730 standard to evaluate the indoor thermal comfort degree is more and more widespread. Many papers about indoor thermal environment are based on the PMV - PPD index as the reference or basis to research and analyze. But few people understand and pay attention to the application range of the PMV - PPD index. So some people misuse and abuse the PMV index and deduce some inaccurate conclusions. In this thesis, based on the analysis of the process of deducing PMV equation, the phenomenon that PMV index is different from the fact in the high temperature condition is explained; furthermore the application range of the PMV equation is confirmed. So to obtain the scientific and reasonable evaluation and conclusion in the process of research of the thermal comfort degree can be ensured.1546|2095|0更新时间：2023-11-28
- 摘要：In this paper a kind of vague space in traditional architecture is analyzed and its mode and dealing ways in Chinese traditional architecture are explored. The authors hope that this article will help us learn from the traditional architecture culture and enlighten the design thread to create modem native architecture.558|1039|0更新时间：2023-11-28
- 摘要：Based on the present problems in university city planning of China, in this paper the reasons for these problems from viewpoint of axiology and methodology are analyzed and the corresponding planning methods are offered, finally the prospects for the future university city planning method are given.364|898|0更新时间：2023-11-28
- 摘要：Trend of aging has raised new requirements for Chinese city transportation system. Based on the sum-up of trip characteristics of elderly people, some adaptability problems of current transportation system were pointed out, concerning accessibility, transit reliability and comfort, walking environment, and barrier -free facility. Then, according to experience of foreign countries, some improvement suggestions were raised here, such as development of transit, construction of barrier - free facility, improvement of walking environment, and traffic safety education.748|7|0更新时间：2023-11-28
- 摘要：This paper first presented the architecture of the CAD system for space - grid structures based on ObjectARX, then some key technologies were studied to realize the system, such as interface control method on MFC, graphic database and parametric drive. A CAD system for space -grid structures based on ObjectARX was develooed with AutoCAD API and the Object- oriented technique.629|6|0更新时间：2023-11-28
- 摘要：Branch -like pipeline is a common structure in gas transmission pipeline. In the light of the constituent properties of natural gas branch - like pipeline system, the system can be divided into fundamental constituent units. This paper presents a realistic unsteady flow model consisting of simple models of pipeline units and connecting conditions, boundary conditions and initial condition associated with units by using system analysis method. The solutions in wide sense are obtained by theory of functional analysis and operator series method, Such a method has the properties of both analytical solution and numerical solution methods. When the divided pipeline unit is larger, an intuitive approximate analytical solution may be obtained; while the one is smaller, a more accurate numerical solution may be acquired. Based on this, a general computer program has been developed for this model and solutions have been used successfully in a local natural gas transmission network in Sichuan. It is proved that the model and algorithm proposed in this paper are of the advantages of convenient calculation, high precision, time saving and wide application range by way of analysis and application.606|8|0更新时间：2023-11-28
- 摘要：Considering the complicated distribution of wind load on the surface of the tall building, the 1:300 scale model test of YingLi building is completed in the No.2 environment wind tunnel, which belongs to the State Key Lab of Environmental Engineering College, Beijing University. Based on the calculation and analysis of the test results, this paper discusses the coefficient of wind-induced vibration and shape coefficient of wind load , gives the maximum and minimum value of surface wind load, which can be used for the wind resistant design and insure the security of the building under 100 years return period wind load.554|10|0更新时间：2023-11-28
- 摘要：The Effect of horizontal strengthened story to the seismic response of super high - rise steel braced frame is analyzed in this paper through the finite element software ANSYS. By comparison of six different schemes of a 32 - story building, further research is presented on the influence of the quantity of strengthened story to the lateral stiffness, the inner force of components under earthquake and the distribution of shear force among inner tube and outer frame. According to the study, the Wuhan International Securities Mansion, which is a super high -rise steel structure, is described as verification. The response of the building is analyzed in small earthquake. The study can serve as the references of super high - rise structure with horizontal strengthened story design.993|12|0更新时间：2023-11-28
- 摘要：A nonlinear finite element analysis using ANSYS is applied to the vertical mechanical behaviors of three specimens of reinforced concrete transferring joints with inchned columns, which are used in high - rise buildings. A comparison is made between the analytical achievements and the test results, including the mechanical behaviors, load - transferring path and the failure modes, and a good agreement is obtained. The reliability of the software ANSYS in the nonlinear analysis of such reinforced concrete structures is verified and developed.618|743|0更新时间：2023-11-28
- 摘要：Wind speed time series obtained with numerical simulation methods are adopted in structural analysis of wind - induced vibration. In this paper, based on the natural wind properties and the correlativity of nodal wind speed time series, AR model is employed to simulate wind speed time series, and the AIC rule is used to fix the rank of the AR model. Statistical analysis results of numerical wind speed time series show that AR model is efficient in simulating nodal wind speed time series which has time and space correlativity, and that the simulation precision, simulation efficiency and calculation stability answer the needs of practical engineering.639|997|0更新时间：2023-11-28
- 摘要：An experimental study on consolidation and drainage of two gravels with different grading was carried out using high - pressure large - scale tri - axial testing facility. A concept of equivalent surrounding pressure is introduced. An analysis was carried out on the effect and mechanism of reinforcement, experimental surrounding pressure and soil properties. Results show that the reinforcement can improve the strength and failure strain of the material and delay the failure of the soil. The effect of reinforcement of soil - gravel depends on the surrounding pressure and weathering of the gravel.557|802|0更新时间：2023-11-28
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- 摘要：It is very important to adopt a new index to evaluate me ratinality of energy consumption effectively, at the time to make great effort to reduce the energy consumption in water supply system. Current index of unit electricity consumption and integrated unit electricity consumption to assess the rationality of the energy consumption of the whole water supply system in our country cant be used to compare from landscape orientation. Aiming at the case, an index of efficiency is put forward on the base of analysis of the minimum energy that the water transportation in water supply system needs. According to the analysis of the index, the function to compare the energy consumption of different whole water supply systems of the index is proved.448|677|0更新时间：2023-11-28
- 摘要：By the study of the influence of COD concentration on denitrifying phosphor removal of A/ASBR (anaerobic/ aerobic sequence bioreactor), it was shown that the favorable treatment effect had been gained with the COD concentration between 220 and 300mg/l; the higher or lower concentration of COD was unfavorable to the work of the system. In our test, it has been confirmed that the rudimental carbon resource organism and cell depositor PHB deposited in anaerobic stage has a significant influence on the process of denitrifying phosphorous removal. The better correlation has been observed also between the consumption of PHB and denitrifying phosphorous removal when the use of cell depositors PHB as carbon resource is concerned. It indicates that the deoxidization of 2 mg nitrate may accelerate the absorption of 1 mg phosphorous.665|1028|0更新时间：2023-11-28
- 摘要：In this paper, the conditions of air - cooled heat pump operation indoors in winter are analyzed. The corresponding performance of air - cooled heat pump operation is gained. The ventilation condition for stable operation of air - cooled heat pump indoors in winter is found. At the same time, the experimental results are approved by the actual operation effect.448|6|0更新时间：2023-11-28
- 摘要：In this paper, the influences of different kinds and different amount of mineral admixture to Cl-penetration and diffusion in concrete are studied. The results of experiment show that separate addition of mineral admixture (ground fly ash, slag fines, silica fume) into concrete can improve its resistance to chloride ion penetration and diffusion. Furthermore,the effect of silica fume is the best, fly ash second, and then follows slag fines. Mechanism analysis shows that the pozzolanic effect of mineral admixture improves the interface between the cement and aggregate in concrete, reduces the total porosity, makes pores more smaller, on the other hand it increases the Cl-consolidation capability of concrete with low alkaline C-S-H gel produced. So the resistance to chloride ion penetration of concrete is improved.602|13|0更新时间：2023-11-28
- 摘要：This paper gives a new approach to solve the problem of features recognition of parts drawing form by means of multi - layers BP neural network. The concept and arithmetic of expanding property matrix of parts drawing are brought forward. A feature recognition and extraction system of 2D revolving parts drawing is developed by means of secondary development of AutoCAD R2000. These works have high theoretical and practical value.540|6|0更新时间：2023-11-28
- 摘要：Recently, USB systems based on VxWorks are widely used in the embedded system. In this paper, the architecture of the VxWorks Operation System, the embedded USB system and the USB host stack are analyzed. This gives the technical method to development of the USB driver based on VxWorks.730|13|0更新时间：2023-11-28
- 摘要：Real estate exploitations have high risk and its exploitation environment is quite uncertain. The traditional investment value methods, such as the net present value and discount cash flow methods, usually undervalue the real estate value. In this paper the real option pricing theories and methods are applied to discuss real estate investment value under uncertainty. This method provides a new approach for real estate items.669|1160|0更新时间：2023-11-28
- 摘要：The evaluation of competence for site manager has characteristics of multi - factor, fuzziness and complexity , this paper takes use of fuzzy evaluation and multi - factor with the standard of professional qualification of international project manager in Chongqing to evaluate the competence of site manager based on his performance and sets forth the evaluation based on a actual sample.612|723|0更新时间：2023-11-28
- 摘要：The main structure in construction engineering is the organic part of the load - carrying system of construction engineering. Its quality is the core for realizing the value of construction engineering quality. The essence of its quality problems is that the quality behavior, intermediate output or final product of the construction body cant meet the requirements of national laws, regulations and obligatory criteria during construction work. Its quality problems have the following eight traits such as complexity, frequent occurrence, potentiality, chain effect, heavy damages, multiple responsibilities, difficulties of treatment and high expenditure for treatment.419|6|0更新时间：2023-11-28
- 摘要：The group of Mid - mini enterprises under mass - economy is the intermediate organization built up by specialized division of work and cooperation. This kind of organization is flexible in operation with high efficiency, but difficult in development of new technology. On the basis of analyzing the character and deficiency of the mid - mini enterprises, in this paper, through providing a framework of information service platform for the mid - mini enterprises to enhance their creative ability and complex competition. The construction and operational strategy of such platform are investigated. Finally a successful case study is given.458|9|0更新时间：2023-11-28
- 摘要：The enterprises' environmental responsibility is the duty of the enterprises in environmental protection for the society. In this paper, by analyzing the imperfection of legislation in enterprises' environmental responsibility, it is pointed out that legislation perfection should be done through affirming the enterprises' environmental responsibility, completing the resource utilization legislation and paying attention to the construction of interrelated legal system. So, it can make the enterprises do some measures actively to use the resources properly and put the cleaner production into practice.434|8|0更新时间：2023-11-28
- 摘要：With the strengthening of constitutional protection that legal private property is not to be encroached upon and the land usufructs paid regime are further clear, the regime of urban housing dismantling and moving is facing a vigorous test. This paper analyzes three problems: the justice of the withdrawal of land use right, the legality of the alteration of the land use right and the rationality of the compensation of the land use right during the urban housing dismantling and moving. Finally, this paper tries to find some effective measures to solve the chain problems.545|18|0更新时间：2023-11-28
- 摘要：The most common used method for safe monitor of high slope is to set a fixed observation point to monitor the transformation. But in urban area, due to restriction of the site and telecommunication conditions the transformation of high slope may have an impact to the fixed point and the result and the result we take from the point may be not correct. To avoid the impact and improve the accuracy, in this paper, a coordinate difference method to monitor the transformation of high slope with Total station actively is put forward and the principle, error analyses of this method are described and its application in safe monitor of high slope is introduced.486|7|0更新时间：2023-11-28
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