最新刊期
      卷 20 ， 期 2 ， 1998
      • Vol. 20, Issue 2, Pages: 1-5(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.001
        摘要：Thrdugh construction cost analysis, the paper provides the monitoring forecast models and the Construction Cost Harmonizaton-Control models.  
          
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      • A Change of Sampling Period in Simulation of Sampling Control System

        Vol. 20, Issue 2, Pages: 6-10(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.002
          
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      • Sustainable Development of City

        Vol. 20, Issue 2, Pages: 11-15(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.003
        摘要：This paper discusses the strategies of sustainable city development and approaches of sustainable city planning and design. The definition and essentials of sustainable city are also explored, and it is pointed out that constructing sustainable city would be a historical tendency.  
          
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      • Study on Colour Difference of Coated Glass

        Vol. 20, Issue 2, Pages: 16-21(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.004
        摘要：This paper discusses the reasons of existing colour difference of coated glass.Its spectral reflectance was measured by using spectrophotometer. The effects of visual field,colour space and standard illuminant on the calculated value of colour difference of the glass are also analyzed. Furthermore,this paper provides a suitable method to determine the characteristic value of colour difference for coated glass sample.  
          
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      • On Disappearance of Characteristic Styles in Cities

        Vol. 20, Issue 2, Pages: 22-25(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.005
          
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      • Location of Buildings

        Vol. 20, Issue 2, Pages: 26-29(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.006
        摘要：The maximum intensity of direct solar radiation falling on a vertical surface and the relative solar altitude and azimuth angles under this condition are given, which can be used in urban planning to determine the relative location of buildings.  
          
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      • A Novel Model about Three_Dimensional Infinite Element

        Vol. 20, Issue 2, Pages: 30-34(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.007
        摘要：A novel model of 3D 12_node infinite element is presented in this paper.The mapping functions in the novel model are clear_cut in the concept and concise in the form.The problems,which emerge in using the infinite element model of the reference, appear in using the novel model.A comparison between the novel model and the infinite element model of the reference is made by computing the examples.The results show that the novel model has the advantages in performance and accuracy.  
          
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      • Vol. 20, Issue 2, (1998) DOI: 10.11835/j.issn.1674-4764.1998.02.008
        摘要：This paper presents a discussion on various boundary integral equations reduced from the exterior Neumann problem of Helmholtz equation.The author analyses how the famous difficulty that some equations have no unique solution when the wave number k is an eigenvalue of an interior problem is arised in the course of reducing these equations from Helmholtz representations,and proposes a method of overcoming the difficulty,that is,introducing a direct boundary integral equation which has unique solution for all wave numbers k and is equivalent to the original boundary value problem.Besides,advantages and shortcomings for these integral equations are estimated respectively.  
          
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      • Vol. 20, Issue 2, Pages: 41-46(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.009
        摘要：Based on the crack tip microcrack density theory,a supposition that total AE count is directly proportional to the total microcrack length is proposed,a relationship between total AE count and stress intensity factor for stable crack growth is derived.With a series of experimental results,the relationship between theoretical derivation and the experimental results is compared,it shows that the theoretical derivation coincides better with the experimental results.  
          
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      • A Practicable Engineering Algorithm ofParallel Machining System

        Vol. 20, Issue 2, Pages: 47-51(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.010
        摘要：Parallel machining system is a kind of typical production environment.Its scheduling algorithm has Np_Completeness if E/T is optimal criterion.In this paper,an advanced heuristic algorithm is developed.The new algorithm's property lies in simplified computation,low complexity and easy programming.It has been shown that the heuristicalgorithm can be used in engineering.  
          
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      • The Quality Evaluation of Concrete

        Vol. 20, Issue 2, Pages: 52-59(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.011
        摘要：The accidents and hidden troubles in constructional engineering quality must be restrained and eliminated.Strictly controlling the quality of concrete is a key link of ensuring constructional engineering quality.To strengthen the quality evaluation of concrete is an effective measure to improve the quality of concrete.The author takes a living engineering example as an object of the study,considers the compresssive strength of concrete as a focal point,regards the standard engineering criteria as the code of conduct and adopts the mathematical statistics scientifically to assess the control level of construction quality,so as to improve the management level and to promote good quality of engineering.  
          
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      • Cloudy Sky and Maximum Luminance Element

        Vol. 20, Issue 2, Pages: 60-64(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.012
        摘要：In this paper, the relation of cloudy sky luminance with particle scatter and air mass is discussed by using the results of atmospheric and geometrical optics. Based on the microcosmic mechanism, the existence of the maximum luminance element in cloudy sky is clarified and an interesting result is obtained.  
          
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      • Vol. 20, Issue 2, (1998) DOI: 10.11835/j.issn.1674-4764.1998.02.013
        摘要：This paper introduces an experimental research on the compressive strength of the heated concrete tested on the small cores of 45 mm and 70 mm in diameter by compression and transverse cutting methods.By means of mathematical statistics, the test strength equations and regression curves obtained are quantitatively analyzed.  
          
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      • Vol. 20, Issue 2, Pages: 69-72(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.014
        摘要：First of all, this paper simplifies the basic equation, then the solution of the problem can be obtained by means of the method of weiqhted residue on the boundaries.  
          
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      • Vol. 20, Issue 2, Pages: 81-88(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.016
        摘要：In this paper,the developments and applications of Trenchless Technology for underground pipeline are presented,the principles of its technique families are described sequentially and the world_wide trend of this new technology is also outlined.Finally,based upon cultivating the China Market of Trenchless Technology Industry,this paper puts forward the tactics and direction of our country for the development,research,popularization and application of this new construction technology.  
          
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      • The Application of Microcomputer in Experiment on Demarcating Thermocouple

        Vol. 20, Issue 2, Pages: 89-93(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.017
        摘要：A traditional method of experiment on demarcating thermocouple is analyzed and its shortcoming is indicated.It is proposed that the experimental device for demarcating thermocouple should be advanced through application of a microcomputer.The timing for data sampling is carried out in a real time clock way and then the analogue signal is converted into digital information through a A/D converter.Finally, the results of demarcating thermocouple are audio-visually displayed on the screen in a graphic mode.  
          
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      • Vol. 20, Issue 2, Pages: 94-99(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.018
        摘要：This paper discusses the size of foundation base in reinforced concrete single-foundation under column.The two kinds of direct-calculating formulas have been derived. They are simple and helpful.They can be easily used in foundation design.  
          
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      • A New Design for the Rolling Bearing-Fixed Device

        Vol. 20, Issue 2, Pages: 100-101(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.019
        摘要：This paper describes some new ideas and new designs based on the fixing device of GB rolling bearing with fastening liner.Its character lies in only need of removing one bearing cap when it is needed to dismount the bearing from its axle without using dismantling device, but by using a special nut.Therefore it will be convenient, easy and time-saving.  
          
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      • Markovion Queuing Process

        Vol. 20, Issue 2, Pages: 102-108(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.020
          
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      • Vol. 20, Issue 2, Pages: 109-115(1998) DOI: 10.11835/j.issn.1674-4764.1998.02.021
        摘要：This paper deals with the investigation of the structural behaviour,mechanical conditions and the impacts of the related factors of slide_resistant system on cantilever pile_anchorage pile.This investigation is based on analysis of indoor model test and a great number of computer_simulated analyses.The side_resistant system was used for landslip_resistant project in Shijialiang of Chongqing,and provided good social and economic benefits.  
          
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