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two bridge
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  双桥
     Some Research on the Tunnel of a Sort of Two Bridge Knots
     对一类双桥纽结的隧道的研究
短句来源
     The last chapter is the main chapter of this paper, we worked out some result on the tunnels for two bridge knot embedded in solid torus.
     第三章为本文的主体部分,给出了实心环体中的一类双桥纽结的隧道的一些结果。
短句来源
     Model LCT 40 steel scrap carrier developed successfully for the requirements of production in steel plants is driven by two bridge drivers, with the disengageable carriage. Using the booster type diesel engine and mode CAT966E hydraulic mechanical variable speed device made by imported foreign techniqes as power source and driving part, it is equipped with the advanced hydraulic system and brake system, with good performance of whole machine, reliable working and advanced technical level overseas in 1990s.
     根据钢厂生产需要而研制成功的LCT—40型废钢运输车,具有双桥驱动、可脱式车箱结构,以引进技术生产的增压式柴油机为动力源、CAT966E型液力机械变速箱为传动部件,并采用先进的液压系统及制动系统,使整机性能优异,工作可靠,达到国外90年代先进技术水平。
短句来源
  两种桥梁
     For the time-varying moving loads on bridges, four indirect moving force identi fication methods with two solutions to two bridge models have been introduced in this paper, and then validated by model experiments in the laboratory.
     针对桥梁上时变移动车载 ,提出了两种桥梁模型、四种移动车载间接识别方法和两种不同解决方案 ,并通过模型实验对上述不同桥梁移动车载解决方案进行验证。
短句来源
  常用桥梁
     The weldability of steel 14MnNbq used on the beams of Wuhu Yangtze River Bridge is studied in this paper. The correlative technical datum is compared with two bridge steels-16Mnq and SM490C. The test results provide the basis for establishing the welding procedure of 14MnNbq beams.
     对芜湖长江大桥钢梁用 1 4MnNbq钢焊接性进行了试验研究 ,并与国内外常用桥梁用钢 1 6Mnq、SM490C进行了相关对比分析 ,通过试验为 1 4MnNbq钢梁焊接工艺的制定提供依据。
短句来源
  “two bridge”译为未确定词的双语例句
     Prestressed concrete composite box-girder bridge with corrugated steel webs has been studied and constructed in many countries,since the first bridge of this kind,the Cognac Bridge in France,built in 1986.In China,the two bridge of this kind have been built.
     自世界首座波形钢腹板PC组合箱型梁桥———法国Cognac桥于1986年建成以来,许多国家对该种结构进行深入的研究并建造相应的实桥,我国已有两座波形钢腹板组合箱梁桥建成。
短句来源
     This paper is on the introduction two bridge principle foundations of direct current , discuss 4 ends mainly Niu resistance law eliminate use method and the principle of contact resistance and company line resistance, and have given some kinds of practical methods that raises small resistance accuracy.
     本文在介绍直流双电桥原理基础上,主要讨论了四端钮电阻法消除接触电阻和连线电阻的原理和使用方法,并给出了几种提高微小电阻测量准确度的实用方法。
短句来源
     Based on modern bridge design theory, the method of finite element, random vibration, the techniques for measuring and analyzing vibration, summarizing the method of load test about bridges, the dissertation managed to find out the characteristics which was represented by two bridge projects, the technique datas of design, construction and maintenance were provided by using of those performance.
     本文以桥梁结构设计理论、有限元法、随机振动、振动测试与分析技术为理论基础,总结了桥梁的荷载试验方法,并通过对两个工程实例的研究,揭示了连续箱形梁桥的静动力特性。
短句来源
     However, in the two bridge seismic design codes of China, Code for Seismic Design of Highway Engineering (JTJ 041-89), and Code for Seismic Design of Railway Engineering (GBJ 111-87), the compositive factor is applied to reduce elastic seismic force, but almost no details about confining reinforcement is specified to ensure required ductility level corresponding to such a force reduction. It is apparent that this kind of specification enhances the seismic hazard of bridges.
     而我国桥梁抗震设计参照的两部规范:《公路工程抗震设计规范》(JTJ004-89)和《铁路工程抗震设计规范》(GBJ111-87),虽然使用综合影响系数对弹性地震力进行折减,却没有相应的约束箍筋来保证结构应具有的延性水平,大大增加了地震破坏的危险性。
     Calculating Geometric Characters of Two Bridge Component Sections
     两类桥梁构件截面的几何特性计算
短句来源
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      two bridge
    These values decrease to 197 and 102 kJ/mol for population of two atop-sites and two bridge-sites, respectively, on the same Pt10 cluster.
          
    The service lives for two bridge decks are estimated.
          
    Then it is proved that two bridge knot complements cannot contain totally geodesic orientable surfaces.
          
    The two bridge gauges were orientated so as to measure strain in the principal directions of the particleboard samples.
          
    Two `bridge gauges' with a gauge length of 38?mm, were fixed to the specimens so that they were positioned centrally between the loading heads.
          
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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. The...

    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...

    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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