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major
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    COUNTERMEASURES AGAINST DISASTER OF MAJOR INDUSTRIAL BASES
    大型工业基地减灾对策
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    Application of Major Diameter Ring Beam Soil Support System for Deep Foundation Pit Engineering
    82m直径环形支护体系在深基础施工中的应用
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    Optimization of Formwork System of Concrete Cast in Situs for Major Structure of High rise Buildings
    高层建筑主体结构现浇混凝土模板体系的合理选择
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    In the article, detailed study of some crucial factors concerning demands forecast, schemes comparison, major device performance and energy cost for design and optimization is carried on.
    因此,文章对分布式冷热电联产系统的设计与优化进行深入的研究,对负荷预测,方案确定,设备性能,能源价格等对系统实际运行后的成败与否起决定性的因素进行了分析。
    The Major Structure Construction of Jingmao Building
    金茂大厦主体结构施工(上)
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  major
Our major contribution in this paper is to show the following.
      
A major role in this study is also played by arbitrary ultraflat polynomials, that is, including those that are
      
Delivery of vaccine is a major impediment to ensuring vaccine efficacy and compliance.
      
The results indicate that thermodynamic and electronic parameters are major contributors to the activity.
      
The results indicate that electronic and thermodynamic parameters are major contributors to the activity.
      
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Accoustics becomes so important and complicated a problem in modern building practice, that it should be properly considered by every architect today. From the view of its practical aspects, the author makes a general review of several major problems in recent development of architectural acoustics. 1. Criteria of room acoustics: a)Reverberation time, b)Practical aspects of physical acoustics and discussion of the second physical quantity, c)Subjective observations; 2. Sound Systems; 3. Acoustical materials;...

Accoustics becomes so important and complicated a problem in modern building practice, that it should be properly considered by every architect today. From the view of its practical aspects, the author makes a general review of several major problems in recent development of architectural acoustics. 1. Criteria of room acoustics: a)Reverberation time, b)Practical aspects of physical acoustics and discussion of the second physical quantity, c)Subjective observations; 2. Sound Systems; 3. Acoustical materials; 4. Noise control and sound insulation.

建筑声学在现代建筑设计中的地位日趋重要,其复杂性也随之而增加;为今日每一建筑师所值得注意的问题。作者以实用的观点对近年来建筑声学发展中的几个主要问题加以综合的叙述。一、室内音质的评价标准:(1),混响时间,(2)物理声学的意义,和第二物理参量的研究,(3)主观评价;二、扩音系统;三、吸声材料;四、噪声控制和声音隔绝。

In this paper some major contents and peculiarities of the new Soviet code of steel structural design are at first presented, and then some explanation and discussion on the design formulas of buckling problems are also included.

本文首先介绍新的苏联钢结构设计规范(НИТУ 121-55)的主要内容及其特点,然后对于规范中结构设计的计算部份,特别是关于结构稳定方面,作一些说明和讨论。

In this paper, a survey is made over the existing theories of seismic forces onstructures. It is found that all the theories fall into one of the following cate-gories: 1) the so-called "statical theory" which considers the structure subject toan equivalent constant acceleration; 2) theories based upon simulated simplified ground motions; 3) theories based upon recorded actual ground motions; 4) theories based upon random impulses. Critical comments have been given to the above theories, especially to thefourth...

In this paper, a survey is made over the existing theories of seismic forces onstructures. It is found that all the theories fall into one of the following cate-gories: 1) the so-called "statical theory" which considers the structure subject toan equivalent constant acceleration; 2) theories based upon simulated simplified ground motions; 3) theories based upon recorded actual ground motions; 4) theories based upon random impulses. Critical comments have been given to the above theories, especially to thefourth one. The writer further gives a brief but cpmplete description of the responsespectra of the structure and on this basis, all the theories are co-related. Computations made by G. W. Housner for major American earthquakes dis-close that the acceleration spectra for damped system are flat curves withoutoutstanding peak value. For this reason, the writer deems that for certain typeof structures, variation of the acceleration spectral value for different modes of vibration will be small, and may be taken approximately as a constant. As aresult, the seismic forces reduce to this constant spectral acceleration times the.mass of the structure. It is suggested to use this method for estimatingthe base shear but make proper adjustment in its distribution along the height ofthe structure. It is also proposed to tie up this spectral acceleration to the earth-quake intensity scale. Finally, the writer stresses that further development of the theory of seismicforces on structures depends upon researches along following lings: 1) strong-motion program; 2) dynamical properties of structures and materials; 3) effectsof foundation conditions; 4) vertical and torsional seismic forces; 5) co-relationbetween seismic forces and earthquake intensity.

本文回顾了关于建筑物地震力的理论的发展过程,对于现行的几种理论进行了评论;认为在我国目前条件之下,可以采用一种基于动力原则的地震力系数;最后对今后的研究方向提供了一些意见。

 
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