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two bridges
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  两桥
     A Theory Study on Suppressing Transverse Vibration of Bridge by Joining Two Bridges of the Up and Down Tracks
     上、下行两桥连接抑制桥梁横向振动理论研究
短句来源
     The effectiveness of suppressing transverse vibration of the bridge by joining two bridges of the up and down track were researched with the unmerical method.
     通过数值计算 ,从理论上对上、下行两桥连接抑制桥梁横向振动的效果进行了深入的研究。
短句来源
     The results show that the amplitude of transverse vibration of the bridge will be obviously reduced(the ratio of suppressing is approach to 50%) when the two bridges are connected to each other.
     结果表明 ,两桥连接之后桥梁横向振幅将明显减小 (减振率接近 50 )。
短句来源
     Now, these two bridges are connected in high precision with satisfying construction quality and control results.
     目前两桥均已高精度合拢 ,取得了满意的施工质量和控制结果
短句来源
  “two bridges”译为未确定词的双语例句
     The paper states mainly the enlargement option of Panjin Bridge and Panshan War Preparedness Bridge and the calculation of the enlargement length of these two bridges after moving the southern embankment to northern direction.
     本文着重论述了南堤北移后 ,盘锦大桥、盘山战备桥的扩建方案及两座大桥扩建长度的计算
短句来源
     The whole bridge finite element method model for the additional longitudinal forces in continuous welded rail on bridges was established. Using a calculation program, this thesis analyzed the forces in continuous welded rail on two bridges of zheng-xi passenger special line; they are additional longitudinal forces of temperature, bridge flexure and the force due to braking and rail breaking.
     本文结合我国客运专线的建设工程,对客运专线大跨度混凝土桥上无缝线路纵向附加力进行了研究,将轨道、桥梁及其墩台作为一个整体结构,建立了桥上无缝线路纵向附加力计算的全桥有限元分析模型,并应用自编的计算程序,对郑西客运专线两座大跨度桥上无缝线路温度附加力、挠曲附加力、制动附加力进行了计算分析。
短句来源
     The channel bridges of Hangzhou Bay Sea-Crossing Bridge include two bridges separately over the south and north channels. The south channel bridge is a steel box girder cable-stayed bridge with a main span 318 m,a single A-shape pylon and double cable planes,while the north channel bridge is a steel box girder cable-stayed bridge with a main span 448 m,two diamond-shape pylons and double cable planes .
     杭州湾跨海大桥航道桥包括南航道桥和北航道桥,南航道桥为主跨318 m的A形独塔双索面钢箱梁斜拉桥,北航道桥为主跨448 m的钻石形双塔双索面钢箱梁斜拉桥。
短句来源
     The method is programmed and used for the simulation of a HVDC system with one pole and two bridges, the results are satisfactory.
     本文利用计算跃变量的方法消除了隐式梯形积分法用于换流器仿真的所存在的非原型数值振荡,经过一个单极双桥HVDC系统计算,结果令人满意。
短句来源
     An example with two bridges and three classes of vehicle is used to test the model and algorithm.
     还对一个含两座桥梁与三种车型的简单算例,进行了计算与分析。
短句来源
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  相似匹配句对
     Two.
     二、末日意识
短句来源
     Two.
     二.
短句来源
     Two actual long-span bridges are used as examples.
     本文的抖振时域分析计算实例是两座具有代表性的大跨度桥梁。
短句来源
     Part Two presents five bridges to harmonious interrelationship.
     第二部分论述了五种消除隔阂,建立和谐人际关系的途径。
短句来源
     Building Bridges
     架起心灵之桥(英文)
短句来源
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  two bridges
The mode of the remaining two bridges was determined by chemical and selective synthesis of three possible disulfide bond isomers of bombyxin-IV.
      
The threshold for observing a mutual locking depends on the quality of the Dayem bridges as well as on the distance between the two bridges.
      
The two bridges are formed by C11 and C12 atoms where C11 is equatorial to Cu1 and apical to Cu2 and vice versa for atom C12.
      
The solutions of the momentum constraints on the Einstein-Rosen manifold with two bridges, representing two black holes, are analyzed.
      
Therefore, the vulnerability of two bridges crossing the Rhine River in Cologne, Germany, was assessed using ground motion scenarios computed for four profiles crossing the Lower Rhine Embayment.
      
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In this paper, the higher harmonics generated in power converterswhich have found wide application in industry are analysed in a systematic way.The relationship between system short capacity and converter power is investigeted,so far as the distortion of the bus voltage is concerned. Firstly, computation ofthe harmonic-voltage for the case of one and two-bridge circuit are given, thephases displaced from each other are also established, then the equivalent linearharmonic-networks for both kinds of...

In this paper, the higher harmonics generated in power converterswhich have found wide application in industry are analysed in a systematic way.The relationship between system short capacity and converter power is investigeted,so far as the distortion of the bus voltage is concerned. Firstly, computation ofthe harmonic-voltage for the case of one and two-bridge circuit are given, thephases displaced from each other are also established, then the equivalent linearharmonic-networks for both kinds of circuit are derived. On the basic, taking S. C.R. and control angle a as independent variables, equations for the computation ofdistortion factor of bus voltage waveform are developed. In the meantime, thedistortion factors of bus voltage waveform against S. C. R. and α are plotted incurves, with an electronic microcomputer, in order to facilitate its use in engineeringdesign.

本文对工业上广泛应用的可控硅变流设备所产生的谐波作了较系统的分析;从母线电压波形畸变的角度,探讨了交流设备的功率和系统短路容量的配合关系。文章在计算了6脉波单桥变流器和12脉波双桥变流器的谐波电压并确定了它们的相位关系之后,导出等值线性谐波网络。建立了用短路比S.C.R.和控制角α表示的母线电压波形畸变因数DF的关系式,并利用电子计算机计算和绘制了便于在工程设计中实际应用的曲线。

A new type of macrocyclic polyethers has been synthesized. It consists of a monocyclio polyether ring and two side chains. The monocyclic polyether is composed of two bridge head nitrogen atoms and two hydrocarbon bridges, each bridge is separated into intervals by oxygen atoms. The side chain is made of ethyleneoxy polyether with alkyl group as end group. The size of monocycc polyether and side chain may be varied as desired. The general formula is shown as 2 in the Chinese Text....

A new type of macrocyclic polyethers has been synthesized. It consists of a monocyclio polyether ring and two side chains. The monocyclic polyether is composed of two bridge head nitrogen atoms and two hydrocarbon bridges, each bridge is separated into intervals by oxygen atoms. The side chain is made of ethyleneoxy polyether with alkyl group as end group. The size of monocycc polyether and side chain may be varied as desired. The general formula is shown as 2 in the Chinese Text. The synthetic route of the compounds was described [see Formula (1~6) in the Chinese Text].In order to obtain pure products, the reaction mixture, after the solvent has been distilled off, is treated with hydrochloric acid. Metal salt is precipitated and removed by centrifugation. The mother liquor is neutralized with tetramethylammonium hydroxide. The desired macrocyclic polyether is extracted into organic solvent and purified after the removal of solvent by vacuum distillation.The ability of oomplexing alkali cations of macrocyclic polyethers has been studied by the method of solubilities of salts in chloroform. Their equilibrium constants are estimated. It is shown that they possess high ability to complex alkali cations. Some of them also possess high selectivity for Na~+ and K~+ ions. The new macrocyclic polyethers possess following characteristics: (1) The method of synthesis and purification is simple and facile, the yields are good (30~65%). (2) When a suitable size of monocyclic polyethers and side chains are chosen, the macrocyclic polyether will possess both good complexing ability and good selectivity. (3) With the number of carbon atoms in the end alkyl group increasing, the solubility of macrocyclic polyethers in organic phase can be substantially improved.

本文报道一类新型大环聚醚的合成.在以1,7-二氧杂-4,10-二氮杂环十二烷(1a)及1,7,10,16-四氧杂-4,13-二氮杂环十八烷(1b)中的两个仲胺上进行含醚键的卤代烷取代反应,获得一批带有两个含有侧链醚键的新型冠醚.以碳酸钾为缩合剂,所得冠醚碱金属配合物经酸分解及四甲基氢氧化铵处理后,得游离的大环聚醚. 用溶解度法初步测定了这类冠醚对碱金属的配位性能.结果指出,其母环及侧链上氧原子数的多少及碱金属离子半径的大小均影响配合物的稳定性,其中有些冠醚对碱金属有良好的配位能力,有的还具有优异的选择性,例如N,N′-β-甲氧基乙基-1,7-二氧杂-4,10-二氮杂环十二烷(13a)对钾及钠离子的选择比大于18-c-β,并比4,4′(5′)-二甲基苯并-30-c-10还高.

This paper gives a brief account on the design for the first two China-built railway bridges of prestressed concrete through girder bridges with spanof 20m(double-track) and span of 24m(single-track)respectively. prestressedconcrete through girder is a through-type structure composed of two mainbeams on both sides and a floor slab in between, with the outstandingadvantage of less height from the bottom of bridge girder to the top of rails.The structure of the two bridges are briefly introduced in the paper,and...

This paper gives a brief account on the design for the first two China-built railway bridges of prestressed concrete through girder bridges with spanof 20m(double-track) and span of 24m(single-track)respectively. prestressedconcrete through girder is a through-type structure composed of two mainbeams on both sides and a floor slab in between, with the outstandingadvantage of less height from the bottom of bridge girder to the top of rails.The structure of the two bridges are briefly introduced in the paper,and the design principle based on theory and on tests are specially empha-sized. The topics covered in respect of the design details are: layout of theducts, the sequence of prestressing, the governing stress, the stresses atcorners etc. In addition, some technical tests and their processes as well asthe results of the traffic tests after conctruction are also included.

本文介绍我国首次建成的两座下承式预应力铁路槽形梁桥的设计概况。两桥的跨度分别为20m(双线)和24m(单线)。槽形梁是由两侧主梁和中间的道床板组成的一种下承式结构,其突出的优点是建筑高度小。 本文就两桥的构造作了简要介绍,并着重阐述了从理论和试验中概括出的设计原则。在设计细节方面,简述了孔道布置、张拉顺序、控制应力、角隅部应力等内容。此外,还简介了一部分工艺试验和建成后的运营试验的过程和成果。

 
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