Such limitations include computation ability, memory capability, power limitation and communication bandwidth and range. Many emerging wireless applications for emergency and military situations depend upon secure group communications. But group key management in sensor networks faces a great challenge because of the resource-limited.

Actual detecting environment is strictly controlled by embattling shape, which directly influences the precision, bandwidth and range of spectrum.

实际测向环境对天线阵的布阵形状要求较严，形状选择的合理与否将直接影响测向精度、测向带宽及测向频谱的范围。

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The two ultra-high frequency outer antenna sensors are made with wide band and narrow band respectively. The gain of two sensors is both greater than 1 and VSWR of the sensors is less than 2 in effective bandwidth range.

研制了宽带和窄带两种超高频外置天线传感器，两种传感器增益均大于1，驻波比在其有效带宽范围内均小于2，均能用于GIS局部放电超高频检测。

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Result shows that in the bandwidth range antenna with VSWR is less than 1.6 while the efficiency reaches above 30% and thus has proved that genetic algorithm is an effective method for designing matching network.

设计结果表明，天线在带宽范围内端口驻波比小于1.6（VSWR<1.6）同时效率达到了35%以上，证明了遗传算法是一种有效的设计匹配网络方法。

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According to the different bandwidth range, we give the different forms to expand the application scope of the formula and for each realization we give the non-planar structure.

根据带宽范围的不同，给出了应用于不同带宽的实现形式，扩展了公式的应用范围并针对每种形式提出了非平面实现结构，丰富了宽带滤波器的设计。

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The results show: both pulse width and bandwidth are widened in positive dispersion medium, but pulse width is getting more and more narrow along propagating direction in negative dispersion medium, which is a typical soliton pulse.

结果表明：在正色散介质中，脉宽及带宽均展宽，而在负色散介质中，脉冲沿传播方向越来越窄，表现为孤子效应。

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This paper presents the pulse signal spectrum bandwidth using Romberg numerical integration algorithm under a certain energy wastage required. A reconstruction signal is obtained by Fourier Series, and the optimum bandwidth of the measurement system is also presented.

本文用Romberg数值积分法计算出在一定能量损耗限值要求下的脉冲信号频谱宽度，并用付氏级数对其进行了信号重构验证，据此得出了脉冲信号测试系统带宽的最佳值。

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For the first type, the pulse duration and bandwidth both enlarge with the increase of pump.

第一种随泵浦功率升高，脉冲宽度及光谱宽度均增大。

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The result is discussed and explained theoretically by the numerical calculation of pulse excitation bandwidth.

上述实验现象在理论上采用脉冲的激发带宽方法作了解释和讨论。

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The laser output energy, dynamic to static ratio, pulse bandwidth ana spectral line width etc. by Q-switching ware mea-sured and analysed theoretically.

测量了调Q后激光输出的能量、动静比、脉宽、谱宽等，并从理论上进行了一些分析。

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The results show that the M2 factor depends on the pulse bandwidth ( or pulse duration), spatial correlation degree and average wavelength.

结果表明，M2因子受空间相关度，带宽（或脉冲宽度）和平均波长的影响。

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Through calculating the flux contrast including 95% focal spot energy with time, it is found that the optimal smoothing effect is achieved with one color cycle and 0.3~ 0.5 nm basic pulse bandwidth.

通过计算包含焦斑能量95%范围内的通量衬比度随时间变化的曲线，得出一个色循环、基准脉冲带宽0.3~0.5nm下可以获得最佳的焦斑平滑效果。

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Determination of spectral bandwidth of a monochromator by DOUBLE-MONOCHROMATIC line intensity method

双谱线光强法测试单色器带宽

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Influence of the Spectral Bandwidth of Thickness Monitor System on the WDM Narrow Band-pass Filter

膜厚监控系统的光谱宽度对波分复用窄带滤光片性能的影响

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Research on Spectral Bandwidth in Optical Parametric Amplification of Negative-Index Media

负折射率材料中光参变放大光谱带宽的研究

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Formula for Calculating Spectral Bandwidth of Grazing Incidence Dye Laser

掠入射染料激光器线宽计算公式

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Studies on Doppler Angle Estimation Methods for the Pulsatile Flow based on the Spectral Bandwidth

基于带宽估计脉动血流多普勒夹角的方法研究

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Thus, it is an important research subject to enlarge the spectral bandwidth.

因此，增加量子阱红外探测器的光谱响应带宽是一个重要研究课题。

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Medium access control of multimedia CDMA systems with effective spectral bandwidth distribution

等效频谱带宽分配的多媒体CDMA系统媒质接入控制

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It can acquire multiplex gain from both in the source and across the source by evaluating the equivalent bandwidth of self-similar traffic.

通过估计自相似业务的等效带宽，该算法能够较好地同时获得信源内与信源间的增益。

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Equivalent bandwidth is introduced in the decision criterion for the dynamic slot allocation algorithm for VBR video source.

在VBR图像的动态时隙分配算法的判决条件中引入了等效带宽的概念。

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