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Based on Louised's approach, the Kramer-Heisenberg-Dirac ( KHD) cross-section expression is extended to involve a transient effect contribution which can be as large as the order of magnitude of KHD erase-section for a short pulse resonance Raman scattering.

本文应用Louisell的方法,推导包括瞬变效应的Kramer-Heisenberg-Dirac(KHD)散射截面公式.对于短脉冲共振Raman散射,瞬变效应可以贡献跟KHD散射截面同量级的新项而不可忽略。

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, Ltd needs, I propose and implement a interactive graphic platform for developing the MRI pulse sequence, based on the global variables, the dynamic link and function libraries which offered by Resonance Instruments Ltd.

针对深圳安科高技术股份有限公司核磁部序列开发的需要,以目前该公司正在使用的由英国Resonance公司提供的库函数、动态链接库、全局变量为基础,开发了图形化核磁共振成像序列开发平台。

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Metal Halide lamps have very serious acoustic resonance problems, the most widely used method to achieve free acoustic-resonance is low-frequency square-wave electronic ballast with an additional pulse igniter.

金卤灯因其声谐振现象比较严重,通常采用低频方波驱动来彻底消除声谐振,附加点火电路。

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In high frequency range, the specular reflection echo have the same wave form as the incident wave, but in low frequency range or resonance scattering range, there is a time expansion of the pulse width after main reflecting echo from smooth curvature surface.

在低频或谐振散射区域,光滑曲率表面的脉冲镜反射回波特征是在主回波后有时间扩展,它是由曲率反射面产生的,称为回波的曲率效应;

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The high voltage direct current charge system employs the mode of the AC alternate voltage charging; the temporary energy storage and primary pulse generating system consist of the resonance circuit and the pulse transformer; the 3-stage magnetic pulse compression network is adopted as the pulse compression link.

其中,高压直流充电环节采用交流调压的充电方式;中间储能脉冲形成环节由谐振倍压电路及脉冲变压器组成;采用三级磁脉冲压缩网络作为脉冲压缩环节。

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Taking the short pulse as an ideal delta function on time scale, we find that the radiation field pattern is just of the "pure" waveguide modes if the resonance frequency equals as integral times as radio frequency.

将短脉冲理想化为时间上的δ函数,可以发现当辐射频率正好等于用来调制电子束的射频的整数倍时,辐射模式表现为纯的波导本征模,此时辐射功率最强。

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HIT resonance with the pulse of the times, and the development counterparts.

哈工大将与时代脉搏共振、与祖国发展同行。

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