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指数波形
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     The test result is also presented to show the difference of the interference effect produced by the new generator and the original HEMP defined in MIL-STD-461D.
     介绍了脉冲源的电路设计和调试结果,通过实验对比了MIL STD 461E与MIL STD 461D两种双指数波形条件下某测控系统模块的干扰耦合效应。
短句来源
     An instrument for measuring ultrasonic attenuation by means of comparing the ultrasonic pulse echo with a calibrated exponential decay wave-form is described.
     本装置用超声脉冲回波与定标指数波形比较的方法测量超声衰减。
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  相似匹配句对
     replay of waveform data;
     波形回放;
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     Index number for atmospheric pollution
     大气污染指数
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     Service Quality Index
     服务质量指数
     Use of ICG late diastolic wave index in determination of cardiac funtion
     ICG舒张晚期波形指数在心功能检测中的应用
短句来源
     Application of speech wave abnormal index in objective assessment of speech quality
     话音波形异常指数在话音质量客观评价中的应用
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  exponential waveform
Samples of an aqueous solution of the CEF were exposed to exponential waveform pulses for up to 16?ms at electric field intensities ranging from 5 to 24?kV?cm-1.
      
In addition, the unidirectional, regulated current, exponential waveform was studied in humans and was compared with the rectangular waveform.
      
The exponential waveform required less charge transfer and energy dissipation than the rectangular waveform, but higher peak currents.
      
A monophasic truncated exponential waveform was compared with the biphasic truncated exponential waveform.
      
Allyn AED10 is as effective as the 2KV biphasic truncated exponential waveform in another commercially available defibrillator.
      
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An instrument for measuring ultrasonic attenuation by means of comparing the ultrasonic pulse echo with a calibrated exponential decay wave-form is described. This instrument is designed to make ultrasonic measurement in the frequency range of 5MHz to 55 MHz and in the attenuation coefficient range of 0.01dB/μs to 3dB/μs. It is capable of . making sound velocity measurements in solid with an accuracy of±0.1%. Internal friction in a single crystal of pure aluminium was measured with this equipment.

本装置用超声脉冲回波与定标指数波形比较的方法测量超声衰减。使用的频率范围是5—55MHz,衰减系数测量范围是0.01—3dB/μs,固体中声速的测量精确度是±0.1%。用本装置测量了纯铝单晶中的内耗。

A novel high voltage pulse generator is developed for the simulation of HEMP according to the standard of IEC61000-2-9 and MIL-STD-461E. The generator can produce both single and repeated pulse. Its double-exponential output has a rise time less than 3ns, with the pulse width around 58ns and amplitude up to 4kV. It can also generate square wave with rise time less than 2ns and amplitude up to 4kV. The circuit design and experimental test of the pulse generator are introduced in this paper. The test result is...

A novel high voltage pulse generator is developed for the simulation of HEMP according to the standard of IEC61000-2-9 and MIL-STD-461E. The generator can produce both single and repeated pulse. Its double-exponential output has a rise time less than 3ns, with the pulse width around 58ns and amplitude up to 4kV. It can also generate square wave with rise time less than 2ns and amplitude up to 4kV. The circuit design and experimental test of the pulse generator are introduced in this paper. The test result is also presented to show the difference of the interference effect produced by the new generator and the original HEMP defined in MIL-STD-461D.

 针对国际电工委员会1996年制定的IEC61000 2 9和美国国防部1999年修定的MIL STD 461E标准提出的高空核爆电磁脉冲波形,研制了一台新型纳秒高压脉冲源。其产生的双指数波脉冲前沿小于3ns,脉宽58ns,幅度可达4kV,此外还可产生前沿小于2ns、幅度最高为4kV的脉冲方波;两种脉冲均可实现单次和间歇可调输出。介绍了脉冲源的电路设计和调试结果,通过实验对比了MIL STD 461E与MIL STD 461D两种双指数波形条件下某测控系统模块的干扰耦合效应。

In order to measure the damage of electric field of electromagnetic pulse(EMP) produced by various kinds of micro-electronics equipment and electric equipment exactly, a portable electric field shielding effectiveness measurement device is designed in this paper. The function of the portable electric field shielding effectiveness measurement device is modeling EMP using electric equipment in the finite area. It is made up of the emitting device and the receiving device. Firstly, the equivalent circuit and the...

In order to measure the damage of electric field of electromagnetic pulse(EMP) produced by various kinds of micro-electronics equipment and electric equipment exactly, a portable electric field shielding effectiveness measurement device is designed in this paper. The function of the portable electric field shielding effectiveness measurement device is modeling EMP using electric equipment in the finite area. It is made up of the emitting device and the receiving device. Firstly, the equivalent circuit and the structure of the emitting device are specified. And the main parameters of the emitting device are determined according to the calculation formula which is deduced from the equivalent circuit. The design idea of the main components of emitting device is discussed, such as antenna, load, switch, and pulse capacitor and so on. According to these discussions, the material of various kinds of components is chosen carefully. And the discussion of the key component which produces pulse electric field is the most detailed. In order to solve the problem of rising time of pulse, the compact pulse generator employing high voltage gas switch and low inductance capacitor is manufactured according to the equivalent circuit and calculation formula. Secondly, the design plan of receiving device is discussed simply, because the design plan is the same as the portable magnetic field shielding effectiveness measurement device. The design plan of receiving device is made up of data collection and system demarcation. Through many tests, the largest size of simulator is less than 1.2 meters. It is found that electric field waveform produced by the device is double exponential waveform. And its rising time is less than 3ns and the decay time is longer than 1 s. According to these experiment results, the portable electric field shielding effectiveness measurement device meets the engineering application entirely.

为准确测量电磁脉冲电场对电气、微电子设备的危害,设计了一种由发射设备和接收设备两部分组成的小型电场屏蔽效能测试设备。其作用是用电气设备在有限范围内近似模拟电磁脉冲。在叙述了测试设备的原理和结构并估算出发射设备的一些参数后讨论了主要部件的设计,并选取了各个部件的材料。为减少脉冲上升时间采用了一种结构紧凑由高压气体开关和无感电容组成的脉冲形成装置。模拟器接受设备包括数据采集和系统标定。经多次调试,测得该设备产生的电场波形为双指数波形,上升时间<5ns,衰落时间>1μs,完全满足工程应用要求。

 
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