脉冲响应

Eular -Bernonulli beam model and Tomosimko beam model were adapted to study the inherence vibration properties of the pipelines under dynamical loads, and the analytical answers of the chanmical results were brought out in the fifth chapter. And gave priority to the Eular -Bernonulli beam model, the simply and convenient analytical resolution for the response of the pipelines under dynamical traffic loads through the impulse function and the congruence method of the vibration form and so on.

本文采用Eular-Bernonulli梁模型和Tomosimko梁模型对动力下Kelvin粘弹性地基中管道固有振动性状进行了分析，提出了各力学结果描述的解析式；并以Eular-Bernonulli梁模型为主，基于脉冲函数、振型迭加法等对管道在动力交通荷载作用下的管道响应问题提出简单便捷的解析算法；在管道受力结果的分析中，考虑管道响应输出的随机性，将管道响应用随机过程来描述其概率特征，使得结果描述更加真实准确。

The recently progress both inland and overseas in studying of the transient eddy current response and the ...

评述了脉冲涡流瞬态响应的计算、提离噪声抑制等方面的国内外研究进展，分析了脉冲涡流检测技术的发展方向。

Photoresponse characteristics of Pr0.7Ca0.3MnO3 thin films were investigated under different applied voltages and excitation light energy densities at room temperature.

在室温下利用波长532nm，脉冲宽度7ns的纳秒脉冲激光研究了不同电压和激光能量密度作用下Pr0.7Ca0.3MnO3薄膜的瞬态光响应特性。

The time-domain response of the induced currents on a scattering object irradiated by a plane wave with a Gaussian pulse in time is expanded as an associate Hermite series in this paper. Using the isomorphism of the associate Hermite function and its Fourier transform, the frequency-domain information can be obtained similarly to the time-domain expansion. According to the corresponding relation between time-domain analysis and frequency-domain analysis, and using the early-time response and the low-frequency information of the induced currents, the non-known coefficients in the expansion series can be decided. The entire responses of the induced currents on the scattering object in both time and frequency domains can be obtained at one time by simultaneous extrapolation computation using both the early-time response and the low-frequency information of the induced currents.

摘要首先根据散射体在高斯脉冲平面波激励下感应电流的能量几乎全部集中在时间轴和频率轴上的有限范围内，该文将时域响应展开为系数待定的连带Hermite级数的叠加，并根据连带Hermite函数的傅里叶变换的自反性，得到与时域响应形式类似的频域响应；然后利用时域方法和频域方法分别计算散射体上感应电流的早时响应和低频信息；最后经过时域和频域联合外推计算，由早时响应和低频信息确定时域和频域响应的待定系数，从而获得了整个时域和频域的完全响应。

The contributions to the induced current and voltage by various electromagnetic field components, such as the vertical electrical field, the horizontal electrical field and the horizontal magnetic field, are compared in this paper in terms of integral of Green function and superposition theorem.

结果显示，Agrawal和Taylor模型得到的电压、电流响应是一致的，可以考虑在有界波电磁脉冲模拟器中进行短线缆的效应实验；由于相同的场分量在不同的模型中对电压、电流响应的贡献并不相同，因此在阐述某一场分量对线缆响应贡献大小时，应该首先说明所采用的传输线模型。

It is shown that this kind of film a-CdSe has an excellent photoelectric characteristics of instaneous response to picosecond laser pulse by testing the responsive time of those detectors using ultrashort light train pulses emitting from a colliding pulse mode -locking Nd:YAG laser.

用对撞脉冲锁模Nd：YAG激光器产生的超短光脉冲序列对探测器的响应时间进行检测，结果表明a-CdSe薄膜对皮秒10~(-12秒级的超短光脉冲作用具有良好的瞬态响应光电特性，探讨a-CdSe薄膜快速弛豫过程的内在机理。

The study of spatial configuration and characteristics of pulsed-wire velocity probe shows that: the yaw-and pitch-response characteristics have a good behavior due to the asymmetrical arrangement of the prongs. Because the amplitude of sensor wire response signal changes with the flow velocity, the differentiated signal is selected to trigger a voltage comparator. The pulsing frequency is restricted to about 100Hz to allow the wire to cool between pulses. The first velocity probe with big acceptance cone has been developed in China, and the way of measuring the Reynolds normal and shear stress and application have been given in this dissertation.

对脉冲热线空间速度探针的空间结构及特性的分析表明：三根长支架平行且安置于同一平面的探针结构可以获得大的测量角和好的测量性能；由于传感丝的响应信号幅值随流速变化较大，故应采用微分法进行信号处理；对于5μm的传感丝由于散热时间基本不变，约为10ms，故脉冲发射的最高频率为100Hz；本文在国内首次研制成功了一种大测量窗的脉冲热线空间速度探针，并给出了测量雷诺应力的方法和实例。

The fast pulse high voltage DC power with star point modulate unit commutates with low voltage modulator solves the above problems, especially, the dip and overvoltag...

而高压滤波电感可以等效到低压星点处，使滤波电感绝缘等级低，通过提供电感续流通道给星点电感预充电，补偿了高压直流开关合分闸时负载电压跌落和过冲，降低电源动态内阻，加速了脉冲边沿动态响应过程，特别适用于需要快速响应脉冲高压电源的微波功率放大元件

By careful study to the deflection response of a hinged-fixed circular plate u nder concentrated impulse loading,the saturated impulse phenomenon in the proces s of response is discussed.

利用有限变形弹塑性连续体的最小加速度原理，建立了分析圆板动力响应问题的数值方法，并通过对均匀分布的脉冲载荷作用下铰支圆板位移响应的细致分析，探讨了响应过程中的饱和冲量现象，指出对于高载范围内的脉冲载荷，相应于最大变形的饱和冲量确实是存在的。

The response of ultra fast photoconduction detector made of SI-LEC GaAs crystal was studied experimently. The response time to picoseconds pulse laser and sensitivity to 532 nm direct current laser were obtained for GaAs detector.

实验研究了具有极快响应的SI-LEC GaAs光电导辐射探测器的响应，测量它对皮秒级脉冲激光的时间响应及对532 nm直流激光的灵敏度。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。