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  a 4
     Both GaW 9 and GaW 9Fe 3 have a 4 electrons reductive peaks, with E 1/2 of GaW 9 minus even more, the GaW 9Fe 3 is α.
     GaW9和GaW9Fe3 都有一个 4电子还原波 ,且E1/ 2 比GaW9更负 ,因此所合成的配合物GaW9Fe3 为α体。
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     When applied a 4Tesla magnetic field perpendiculatr to the thin film,the critical current density of 1.1×106A/cm2 can also be obtained.
     当垂直于膜面外加一个4特斯拉的磁场时,临界电流密度仍可保持1.1×106A/cm2。
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     After cutting by EcoRl, there was a 3.8 kb fragment in three recombinants as similar to that in liver cell and Sp2/0 cell, but not in the fourth recombinant (λ 8a4) which contained a 4.5 kb fragment that did not present in liver cell and Sp2/0 cell.
     经EcoRI酶切后,有3个重组体含有与肝细胞和Sp2/0细胞相同的3.8kb片段,而第4个重组体(λ8a4)没有这一片段,却有一个4.5kb片段,这是在肝细胞和Sp2/0细胞中不存在的。
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     Current market value of 4X4 fiber switch is about 28,000 Yuan,and the 8 X 8 50,000 Yuan,but a 4 X 4 start coupling costs only 3000 Yuan,and 8X8 5000 Yuan.
     目前市面上的4×4的光纤交换机价格大约在人民币28,000元左右,8口的更高达50,000元,而一个4×4的星形耦合器不过人民币3000元左右,8×8的也不过5000元。
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     With this method, 4R overconstrained mechanisms is proved, and also a 4R2P o verconstrained mechanism is determined.
     用该法给出了 4R过约束机构的寻找方法 ,同时对一个 4R2 P机构进行了过约束性判定。
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  “一个4”译为未确定词的双语例句
     The analysis of query set specification QSS(Query set specification) is represented, and QSS is a 4-tuple .
     文章分析了查询组规范QSS(Query Set Specification)技术,Qss是一个4元组
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     1. Suppose G_1 is a subgraph of G, x'(G_1) = 3 and the edges betweenV(G_1) and V(G_1) form a 3-edge-cut of G, then the graph obtained from G by contracting G_1 into one vertex has the same color-character as G.
     3.设Q=v_1e_1Vv2e_2v_3e_3v_4e_4v_1是G中的一个4-圈,则m(G⊕□{e_1,e_3)}=m(G)或m(G⊕□{e_2,e_4})=m(G)。
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     A(4 + 1)-DIMENSIONAL COSMOLOGICAL MODEL
     一个4+1维宇宙模型
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     In this paper, author has designed and realized one powerful embedded networkcontroller with AT91RM9200 which is a 32bits microprocessor with one Ethernetinterface, two CAN bus interface, one 485 bus interface, one RS-232 serial businterface, one USB host interface, one USB device interface, 8 channels 12-bits AD, 2channels 12-bits DA, 2 channels PWM output, one 4×4 keyboard and one 64×128pits LCD man-machine Interface.
     本文以AT91RM9200-32位微处理为核心,设计并实现了具有1个以太网接口,2个CAN总线接口,1个485接口,1个RS-232接口,1个USB主接口,1个USB从接口,8路12位AD,2路12位DA,2路PWM输出,一个4×4键盘一个64×128LCD人机接口的功能强大的嵌入式网络控制器。
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     The volume of chamber is roughly 2 micro liters with the size of 4mm×2mm×0.3mm. The bottom of chamber is constructed by the film of Si3N4 with the thickness of 2 micrometers.
     利用深刻蚀技术制作出一个4mm×2mm×0.3mm容积约为2微升的反应室,反应室的底为约2微米厚的氮化硅(Si_3N_4)膜。
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  相似匹配句对
     (4) When mixed DME burn with diesel, with the increase of ignition depressor ? ?
     (4).
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     4. An accelerative fo rmula.
     4.一个加速公式.
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     O(4)?
     O(4)?
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     4. An application example.
     4.一个应用实例。
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  a 4
In this paper, the Lauwerier map Fa,b(x,y)=(bx(1-2y)+y, ay(1-y)) is considered for a=4.
      
Results of the analysis reveal that crystals of the complex 1 are orthorhombic, space group Pbcn, a = 4.6370(2) nm, b = 0.7549(2) nm, c = 1.3888(4) nm, V = 4.861(2) nm3, Z = 8, M = 945.49, Dc = 2.58 g/cm3, μ = 2.625 cm-1, R = 0.063, and wR = 0.075.
      
The wind velocity was 6 m/s at a 4 m height of single-line S.
      
Furthermore, the Izod impact strength and the tensile strength at room temperature of the blend are also markedly improved by the addition of a 4-8 wt-% compatibilizer.
      
The optimized strategies were a 4-h glycerol-feeding period, induction pH being kept at 5.0 and methanol concentration being kept under 5 g/L.
      
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In ordinary sampled-data control systems the system response to a step input can reach its equilibrium state only within n or more sampling intervals (n is the order of the controlled plant). In this paper multiple-impulses are used, instead of ordinary simple impulses, to speed up the system response. In such sampled data systems the system response to step input can reach its equilibrium state within less than n, even one, sam-pling intervals. Methods of design of such kind of sampled-data systems and their...

In ordinary sampled-data control systems the system response to a step input can reach its equilibrium state only within n or more sampling intervals (n is the order of the controlled plant). In this paper multiple-impulses are used, instead of ordinary simple impulses, to speed up the system response. In such sampled data systems the system response to step input can reach its equilibrium state within less than n, even one, sam-pling intervals. Methods of design of such kind of sampled-data systems and their com-ponents are discussed. In the last part of the paper methods of compensating sampled data systems with dead time elements is also considered.

在通常的脉冲控制系统中,当输入信号是阶跃函数时,系统的过渡过程至少在n个采样周期内才能完全结束(n是控制对象的阶数).文中考虑了采用宽度不等的多拍脉冲代替通常的单拍脉冲以加快系统的过渡过程.在采用多拍脉冲以后,系统的过渡过程可以在少于n个采样周期内,甚至在一个采样周期内完全结束.文中叙述了这种脉冲系统的综合方法,也讨论了系统中有关组成部分——脉冲组成器和校正装置——的构成方案及其参数的计算方法.最后并考虑了由于时滞引起的对系统动态特性有害影响的补偿问题.文中举有例题,对文中各节内容作必要的说明.

In this paper the logical structure of contactless telemechanical system for distributed objects is discussed. A simple method of variable system structure for transmitting and receiving telemechanical information is adopted. The idea is that the information oc-curred in every controlled point (station) and the information of some of those objects,which frequently change their states, are transmitted continually and cyclically, while for other objects their information is transmitted only after any change in...

In this paper the logical structure of contactless telemechanical system for distributed objects is discussed. A simple method of variable system structure for transmitting and receiving telemechanical information is adopted. The idea is that the information oc-curred in every controlled point (station) and the information of some of those objects,which frequently change their states, are transmitted continually and cyclically, while for other objects their information is transmitted only after any change in their states. Thus,the speed of operation will be increased, and also the error probability of system syn-chronization will be decreased. For the realization of the variable logical system struc-ture, several blocks are used repetitively. For example, two commutators and one sim-ple logical unit are used to construct a simple automatic sequential encoder, and at the same time, the two commutators are used also to operate as a matrix commutator for receiving telesignalling information etc. Therefore the system is comparatively simplified and attains a higher degree of "minimization".

本文研究了无触点集中-分散目标远动系统的逻辑结构.文中提出了采用简单的系统变结构来发送和接收信息的逻辑结构方式.对被控制点及一部分比较重要或变化比较频繁的被控制目标的信息,保留了循环传送,而对大部分变化比较慢的被控制目标则采用目标有变化时才传送信号的方式,这样就提高了系统的平均动作速度,同时也减小系统的失步概率.文中采用环节的复合利用及简化的逻辑单元线路来实现这种系统的逻辑结构.例如用两个分配器和一个简单的逻辑单元“和”线路组成了很简化的选点自动程序编码器,同时这两个分配器又复合利用兼组成目标信号接收矩阵式分配器等,因而可以使得这种系统同时又具有较高的极简化度.

Analysis of the low frequency response of automatic balancing D-C amplifier with mechanical chopper is illustrated by a typical circuit in this paper. The analysis of dynamic response of the modulation and the demodulation circuits and the auxiliary carrier wave amplifier have been considered more in details. The analysis is based on solving difference equations since the intrinsic working process behaved by the M-D M circuits using mechanical chopper is more accurately described by difference equation other...

Analysis of the low frequency response of automatic balancing D-C amplifier with mechanical chopper is illustrated by a typical circuit in this paper. The analysis of dynamic response of the modulation and the demodulation circuits and the auxiliary carrier wave amplifier have been considered more in details. The analysis is based on solving difference equations since the intrinsic working process behaved by the M-D M circuits using mechanical chopper is more accurately described by difference equation other than by differential equations.

本文結合一个典型线路对带有机械振子的自动稳零直流放大器的低頻特性,进行了分析,并且着重分析了調制解調輔助放大器对緩变信号的频率响应。所用方法是差分方程求解法,因为用差分方程来描述具有机械振子的調制解調线路的固有工作过程,要比用相同的初始条件的微分方程来描述更为准确。文中推导出調制及解調綫路的調制系数k_M、解調系数k_(ДM)以及它們的传递函数。此外,对放大調制波的阻容耦合放大器也进行了分析。分析結果說明,如果放大器耦合迴路的参数选择得合理吋,則此放大器对緩变信号的調制波可作为理想放大器来处理。文中所得結果可作为設計該类型放大器时选择参数的参考。此外,本文对于采用自动稳零直流放大器作运算放大器时可能产生的持續低頻自激振蕩問題,也进行了討論。

 
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