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计算和设计
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  calculation and design
     Gain calculation and design consideration of Pr ̄(3+)-doped optical fiber amplifier operating at 1. 3μm
     1.3微米掺Pr~(3+)光纤放大器的增益计算和设计考虑
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     (4) A visible analysis software of spiral oil wedge hydrodynamic bearing is developed under the circumstance of Win2000 and VC++6.0, which can realize the analysis, calculation and design of bearing.
     (4)在Win2000和VC++6.0的环境下,设计开发了一套可视化的计算软件,用以计算螺旋槽流体动静压滑动轴承的性能,从而实现了对轴承的分析、计算和设计
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     The Calculation and Design of Serial Electrode Form Capacitive Transducer
     系列电极电容传感器的计算和设计
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     CALCULATION AND DESIGN OF JP SHOTCRETING MACHINE OPERATING MECHANISM
     JP型混凝土喷射机工作机构的计算和设计
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     A PRACOCAL APPROACH FOR FIRE-RESISTANT CALCULATION AND DESIGN OF STEEL COLUMNS
     钢柱抗火计算和设计的实用方法
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     This paper summarizes the process of electric-magnetic design and calculation of hybrid stepper motor,and develops the CAD software in C++Builder6.0 based on Windows98/me/2000/xp Operating System.
     将混合式步进电机的电磁计算和设计过程综合研究,采用C++Builder6.0这一功能强大的编译器,开发出基于Windows98/me/2000/xp操作平台下的混合式步进电机的CAD软件。
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     Designation and Calculation of Hydraulic Capacity to LF
     LF液压站能力计算和设计
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     The adsorption capacities of different components on AC were: CO 2>CH 4>CO, and on MS were:CO>CH 4.On this multiple bed system, CO 2 and CH 4 were mainly adsorbed by AC,and CO by MS.
     并研究了混合气在ACMS复合床层上的PSA过程,其中AC充填于进口端,主要吸附CO2和CH4; MS主要吸附CO,为复合床层PSA过程的模拟计算和设计提供了基础。
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     Then the first order constant current sensor system and the second order constant temperature sensor system are investigated,and the design basis of the temporal and frequency characteristics of this type sensor is presented,it can offer reference to thermal sensor's device design and performance analysis.
     并且通过对一阶恒流电路驱动传感器系统的时间常数和二阶恒温电路驱动传感器系统的响应频率的计算和分析,得到基于M EM S技术的热敏传感器系统的时域、频域参数的计算和设计依据,为此类传感器的器件设计和性能分析提供了重要的参考依据。
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     This paper deals with the calculations and design of a ballast variable resistor with working current as high as 1700 A, and presents a set of generally applicable engineering calculation methods.
     本文讨论工作电流高达1700 A的镇定变阻器的计算和设计,给出普遍适用的工程计算方法。
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     Design and Calculation of Cyclones
     旋风分离器的设计计算
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     The Design of Color Picture Tube
     彩色显像管的设计计算
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     The Design and Calculation of Perforated Metal Sheet
     网孔板的设计计算
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     Design and Calculation of Torque Corrector
     扭矩校正器的设计计算
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     To design the G.
     在设计G.
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  calculation and design
Calculation and design of radiators for the air cooling system of a group of instruments
      
An approach to the calculation and design of metal forming is proposed and theoretically considered.
      
Characteristics of calculation and design of production equipment for gas condensate fields
      
Calculation and design of thread-rolling roller for conical threads
      
Calculation and design of inlet devices and evaluation of their effect on turbocompressor operation
      
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A constant-current drive system is meant the union(or"combination") of several armatures of motors in a main circuit, with the electric power supplied by a constant-current generator and with the speed of revolution regulated by changing the magnetic field of the motor. In the process of regulation the current of the main circuit keeps constant, it is a new application in ship-building. It resembles the Ware-Leonard system in regulating speed and differs from the latter in the principle of control. Besides,...

A constant-current drive system is meant the union(or"combination") of several armatures of motors in a main circuit, with the electric power supplied by a constant-current generator and with the speed of revolution regulated by changing the magnetic field of the motor. In the process of regulation the current of the main circuit keeps constant, it is a new application in ship-building. It resembles the Ware-Leonard system in regulating speed and differs from the latter in the principle of control. Besides, it has an advantage over the Ward-Leonard system, it may control several motors simultaneously with only one generator. The motor in constant-current circuit will not be in danger of being overloaded and unnecessary to add the overload-avoiding apparatus in the circuit. Therefore, the life of the motor may be prolonged. The natural mechanical characteristic of the constant-current motor is absolutely soft, different characteristics may be obtained by proper feeding-back process. This system has been successfully adopted in the different types of vessels. This paper makes a study of the principle and characteristics of the system, nature of the constant-current motor and its control, and thereby presents its theoretical calculation and method of design.

所謂恒流电力拖动系統,就是把几台电动机的电樞串联在同一个主回路里,由恒电流源供电,用改变电动机磁場的方法来調节吝台电动机的轉速,在調节过程中主回路电流维持恒定或实际上维持恒定。恒流电力拖动系統是船舶电力拖动系統中的后起之秀。它在調逮性能上可以与瓦特-利翁那特(Ward-Leonard)系統比美、而在控制原則上又与之不同;并且还有更优于后者的地方,即可用一台发电机来同时控制几台电动机。恒流回路中的电机不会遭到电流过載的危害,也不必加过电流保护装置,因此电机的使用寿命就可延长。恒流电动机的自然机械特性是絕对的軟特性,通过适当的反馈环节就可以得到各种需要的特性。恒流电力拖动系統已經在工程船舶上得到了成功的应用。本文从电力拖动理論的角度分析了恒流电力拖动系统的原理和特点,恒流电动机的特性及控制方法,并給出了恒流电力拖动系统的理論計算和設計方法。

At present, shotcrete lining and rock anchorage are widely used throughout world in the fields of mining, building, railroad and hydraulic engineering. Nevertheless, on shotcrete lining and rock anchorage, so far there is no systematic and integrated designing theory nor effective measures for calculation in practice. The purposes of this paper are to go further into the designing principles and present the practical methods for calculation. In this paper the stabilization and supporting powers of the shotcrete...

At present, shotcrete lining and rock anchorage are widely used throughout world in the fields of mining, building, railroad and hydraulic engineering. Nevertheless, on shotcrete lining and rock anchorage, so far there is no systematic and integrated designing theory nor effective measures for calculation in practice. The purposes of this paper are to go further into the designing principles and present the practical methods for calculation. In this paper the stabilization and supporting powers of the shotcrete lining and rock anchorage to the surrounding rock are discussed also. And on this basis a series of methods for calculation of shotcrete lining and rock anchorage in homogeneous strate are presented.

当前,锚喷支护已在世界各国矿山、建筑、铁道和水工等部门广泛应用。然而,锚喷支护至今尚无系统完整的设计理论,也缺乏行之有效的计算方法。本文目的是探讨锚喷支护设计理论,并提出实用计算方法。文中提出了锚喷支护对围岩灼加固作用和支承作用,并在此基础上提出了一套均质地层中锚喷支护的计算和设计方法。

The regeneration feedback tracking system, or called as computer aided tracking system, can very effectively track large dynamic targets with high accuracy. Digital computers have been used to analyze performance data owing to the fact that the system is a nonlinear one with multi-inputs and multi-outputs.This paper proposes a time-domain approach. And a mathematical model for the system analysis is achieved. In most cases, such multi-inputs and multi-outputs nonlinear system can be converted into a discoupled...

The regeneration feedback tracking system, or called as computer aided tracking system, can very effectively track large dynamic targets with high accuracy. Digital computers have been used to analyze performance data owing to the fact that the system is a nonlinear one with multi-inputs and multi-outputs.This paper proposes a time-domain approach. And a mathematical model for the system analysis is achieved. In most cases, such multi-inputs and multi-outputs nonlinear system can be converted into a discoupled linear time-invariant system, which can be used to analyze in cartesian coordinates error caused by manoeuvre flying of targets and random error of tracking and in spherical coordinates mismatched error. Two examples given show good agreements between results obtained by this approach and those by digital computer simulation. It is concluded that well-known classical frequency method can be used for system analysis and analytical method thus obtained is most applicable for engineering calculation. An optimized system design is also presented.

再生反馈跟踪系统是对大动态目标进行精密跟踪的有效体制。由于这种体制是多输入、多输出的非线性系统,过去只能用计算机对系统非线性动力学方程组求数值解的方法对系统进行定量的研究。本文利用时域算子的方法建立了系统的数学模型,并且得到了系统跟踪精度计算的解析表达式。分析结果表明,系统跟踪的目标机动飞行误差和随机误差归结为直角座标内定常线性系统的分析计算问题,而系统跟踪的失配误差则是球座标内定常线性系统的分析计算问题。因此,所得结果非常适于工程计算和设计

 
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