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This paper describes the basic knowledge of polypropylene, development, modification and cross-linking of related research.

本文叙述了聚丙烯的基本知识，发展方向，改性以及交联的相关研究。

This paper introduces a novel technique for estimating the signal power spectral density to be used in the transfer function of a microphone array post-filter.The technique is a modification of overestimation of noise power spectral density of the existing Zelinski post-filter and McCowan post-filter,which utilize the auto- and cross- spectral densities of the signals.Near-field compensation is taken into account.

介绍了一种用于近场麦克风阵列后滤波语音增强的方法，避免了现有的利用自功率谱密度和互功率谱密度的Zelinski和McCowan后滤波器中噪声功率谱过估计的问题，并加入了近场传播的幅度衰减补偿和相位延迟补偿。

The paper also offers some basic concepts to guide the planning and design of transportation system, in particular, route alignment and cross-sectional design, for the forest conservations, so as to promote a healthy interaction between the city and its forests.

着重研究了保护区的内涵、特点及其交通特征，提出保护区道路交通规划的特殊性，从而形成既要体现生态保护，又要体现旅游服务功能的规划理念，以此来指导保护区道路交通系统、道路线形、道路断面等规划设计，实现城市与森林的互动。

Four-port network with partial height cylindrical objects in rectangular waveguide junctions (i.e., Four-port rectangular junctions), multiple-stepped rectangular waveguide bend and T-septum rectangular waveguide junction are modeled by full-wave mode matching method in order to quickly design the combline cross-coupled filter, corner waveguide diplexer, generalized chebysheve waveguide filters and diplexers with high efficiency in this paper.

本文将它运用于矩形波导接头中带通用圆柱杆的四口网络、多阶梯矩形波导弯头和T—septum矩形波导接头的全波建模，有助于快速高效设计梳状广义切比雪夫滤波器、拐弯波导双工器、广义切比雪夫波导滤波器和双工器。

This paper introduces design issues for cross-coupled LC oscillators.

主要介绍了LC振荡器的设计要点。

On the basis of the shear-lag theory,this paper studies the microstress redistributions induced by the interaction of failure of 90° layers and the breakage of some fibers in 0° layer in cross-ply laminates under tension in 0° direction.

摘 要 基于剪滞理论，研究了在0°方向承受拉伸的复合材料正交叠层板由90°层的破坏及0°层中部分纤维断裂相互作用所导致的细观应力重新分布。

First, this paper examines cross-country regressions and therefore does not trace the experience of any single country in depth.

首先，这份报告研究的是各种跨过别的回归，因而它并没有深入地追溯任何单个国家的经验。

In the paper, the velocity charactedstics of guided wave s along single interface and low-velocity lay-er in cross-hole seismic surveys are researched.

本文研究了井间地震勘探中单界面和低速层导波的速度特征。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。