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frequency system
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  频系统
     Vibrating-Wire-Sensors with Measuring Frequency System and Its Design Based on the Embedded μC/OS-Ⅱ System
     基于μC/OS-Ⅱ振弦传感器测频系统的设计
短句来源
     Vibrating-Wire-Sensors with Measuring Frequency System and Its Design Based on Embedded μC/OS-Ⅱ System
     基于μC/OS-Ⅱ的振弦式传感器测频系统的设计与应用
短句来源
     Design of testing frequency system with PC
     PC机测频系统设计
短句来源
     Study on Digital Correlator in Direct sequence Spreading Frequency System (DS-SS)
     直接序列扩频系统(DS-SS)中数字相关器的研究
短句来源
     Application of Surface Acoustic Wave Device (SAWD) in Spread Frequency System
     声表面波器件(SAWD)在扩频系统中的应用
短句来源
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  频率系统
     THE OPTIMAL CONTROL OF DISCRETE LINEAR POWER FREQUENCY SYSTEM
     离散线性功率频率系统的最优控制
短句来源
     Thinking About the Constraction of an IndependentChinese Time and Frequency System
     建设我国独立自主时间频率系统的思考
短句来源
     The reliability evaluation indices of distribution system are load point average failure rate, load point average interruption duration every time, annual load point average interruption duration, annual customer interruptions, the customer interruption duration, system average interruption frequency, system average interruption duration, customer average interruption duration and average service availability index.
     文中计算的配电系统的可靠性指标是:负荷点的平均故障率,负荷点的平均停运持续时间,负荷点的年平均停运时间,每年用户停电次数,用户停电持续时间,系统平均停电频率,系统平均停电持续时间,用户平均停电持续时间,平均供电可用率。
短句来源
     At present, the Time and Frequency System of high accuracy which contains many atomic clocks builds and keeps a time scale according some algorithm.
     目前,高精度时间频率系统是由多台原子钟联合守时,通过一定的算法建立和维持的,参加守时的原子钟必须处于良好的运行状态。
短句来源
     In this paper, a method of discriminating the working si tuation of a time frequency system composed of frequency standards and dividers on realtime basis is described and the function principle of the diseriminator is presented.
     本文叙述了对由频率源分频钟组成的时间频率系统的工作状态进行实时监测判别的方法以及该设备的工作原理。
短句来源
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  变频系统
     The Vector-Controlled SVPWM Variable Frequency System Based on DSP
     基于DSP的SVPWM矢量控制变频系统研究
短句来源
     The tested is a 6kv/22kv system in testing room,in actual usage it is a 6kV/400k Wvariable frequency system device,the assay given the tested results and its analytics.
     中压变频器在实验室设计为6kV/22kW试验系统,实际设计为6kV/400kW的变频系统装置。 本文给出了实验室调试结果及分析。
短句来源
     A Variable Frequency System Based on Microcomputer MCS-8098
     基于8098单片机的SPWM变频系统
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     The one-line production capacity can be increased by 20% for 1.56 dtex staple fiber through using a new 2 698 f spinneret, replacing booster pump motor and frequency system, reforming carrier box of oiling roll and appropriately elevating spinning velocity.
     采用新设计的2698 f喷丝板生产1.56 dtex纤维,更换增压泵电机及变频系统,改造纺丝上油辊传动齿轮箱,适当提高纺丝速度,可实现短纤维装置单线生产能力增容20%
短句来源
     This paper discusses the method that is applied in SPWM variable frequency system based on editable DSP controller.
     阐述了一种以可编程DSP控制器为核心的应用于变频系统中正弦脉宽调制(SPWM)方法的实现。
短句来源
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  “frequency system”译为未确定词的双语例句
     Design of Embedded Audio Frequency System Based on μC/OS-II
     基于μC/OS-II的嵌入式音频系统设计
短句来源
     Application of FIFO Chip AL422B in Video Frequency System
     FIFO芯片AL422B在视频系统中的应用
短句来源
     2) Realized the HFSS(High Frequency System Simulate) of the strip-line filter.
     2、实现带状线滤波器的HFSS(High Frequency System Simulate)仿真。
短句来源
     2. The simulation and the optimization of filters using HFSS(High Frequency System Simulate);
     2、在HFSS(High Frequency System Simulate)中对滤波器建模仿真优 化;
短句来源
     Auto Testing Frequency System Based on CPLD & μC and VHDL Design
     μC和CPLD实现的频率ATS及VHDL设计
短句来源
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  frequency system
It is shown that the kinetic energy of the quasi-two-week oscillation is larger than that of the intraseasonal oscillation, and is another important low-frequency system in the tropical atmosphere.
      
A multiple-frequency system of equations is averaged to obtain the relativistic equations of motion for a charged particle in the field of a quasimonochromatic wave propagating along a strong magnetic field.
      
The possibility of using the generalized WKB method for studying the steady states of a single-frequency system in three-dimensional potential fields which do not allow the variables to be separated in the Schr?dinger equation is considered.
      
Four-frequency system with a nonlinear capacitance
      
A helpful first step in building an adequate structural model of the present Russian economy is to build a high-frequency system based on monthly statistics for very short run projections of overall economic performance.
      
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The equipment is aimed at manipulating five sectionalizing posts and provided with both, telecontrol and telesignaling. Time-frequency system is employed for the channel. Telesignaling from the five sectionalizing posts works continually and automatically in cyclic order. Self-checking duel information codes are adopted for each operation, in which the direct code is being compared with its inverse counterpart. The logic design is suitable for use, the circuitry is simple, and the equipment is reliable...

The equipment is aimed at manipulating five sectionalizing posts and provided with both, telecontrol and telesignaling. Time-frequency system is employed for the channel. Telesignaling from the five sectionalizing posts works continually and automatically in cyclic order. Self-checking duel information codes are adopted for each operation, in which the direct code is being compared with its inverse counterpart. The logic design is suitable for use, the circuitry is simple, and the equipment is reliable and easy in maintenance.

本文介绍了一套用于电气化铁道分区亭的电子装置。它是1对5的分散集中式系统,遥控与遥信综合于同一系统中。通道采用时间-频率划分。各被控站遥信为经常自动循环传送方式,信息码采用二次传送,正反码校核。逻辑设计合理,电路简单,工作可靠,维修方便。

The standard tachometric equipment described in this paper applies a difference-frequency system for stabilizing speed and a frequency synthesizer is used as the given frequency; a scheme of linear and logical difference-frequency in parallel is provided in the controlling part and a double loop system with a silicon-controlled power supply is used in the adjusting unit. The measuring unit consists of stroboscopic measuring system, which is checked by a digital measuring device...

The standard tachometric equipment described in this paper applies a difference-frequency system for stabilizing speed and a frequency synthesizer is used as the given frequency; a scheme of linear and logical difference-frequency in parallel is provided in the controlling part and a double loop system with a silicon-controlled power supply is used in the adjusting unit. The measuring unit consists of stroboscopic measuring system, which is checked by a digital measuring device of speed. The overall accuracy of this equipment is better than±15×10~(-5)within the range from 30 to 100000 r.p.m.

本文所述的转速标准装置系采用差频稳速系统,用频率综合器作为频率给定,控制部分采用线性差频器和逻辑差频器并联方案,调节部分采用可控硅供电的双环路调节系统,测量部分采用频闪测速系统,且用数字测速法作旁证。整个装置的测量范围为50~100000转/分,准确度优于±5.0×10~(-5)。

The wind generating systems utilizing variable-speed constant-frequency systems can allow the rotational speed of wind turbine to vary with wind speed and operate at a constant and optimal tip speed ratio. Therefore, the wind turbines can maintain an optimal power coefficient over wide range of wind speed and the complex and expensive speed regulating mechanism can be eliminated.The field modulated generator system is a new variable-speed constant-frequency generating device. In this...

The wind generating systems utilizing variable-speed constant-frequency systems can allow the rotational speed of wind turbine to vary with wind speed and operate at a constant and optimal tip speed ratio. Therefore, the wind turbines can maintain an optimal power coefficient over wide range of wind speed and the complex and expensive speed regulating mechanism can be eliminated.The field modulated generator system is a new variable-speed constant-frequency generating device. In this system, a specially designed three phase high frequency alternator is excited by low frequency alternating current. The output, which is a modulated sine wave, is rectified, inverted and filtered to yield the constant frequency output independent of the prime-mover. This generator is specially suited for wind generating system operated in parallel with power grid. In this case, the excitation of the generator may be immediately got from the grid. The generator system synchronizes with the grid automatically. Therefore, the control and stabilization problems of the system can be greatly simplified.This paper makes a comparison between constant-speed constant-frequency and variable-speed constant-frequency wind generating systems, describes the electric circuit and the principle of operation of the field modulated generator system, presents the operational and control aspects of wind generating system utilizing this generator and experimental results of a 4 kW prototype coupled with 6m Darrieus vertical axis wind turbine in the large wind tunnel.

本文对恒速恒频和变速恒频两种风力发电系统进行了比较,阐述了磁场调制发电机系统的线路和工作原理,介绍了采用这种发电机的风力发电系统的运行和控制问题,并讨论了4千瓦样机在大型风洞中和6米达里厄型风轮机配套运行的实验结果。

 
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