查询词典 persistent wave

The relationships of pulse distortion depending on frequency, pulse width, rain rate and path length are studied .The conditions of the broadening and compression for pulse wave are given. Based on the scattering characteristics of fog, the attenuations and reflectivities at millimeter wave are computed and analyzed for radiation and advection fog. The attenuation along earth-space deduced by radiation and advection fog is obtained and the results are compared.

其次基于单个雾滴的散射特性，对毫米波段电磁波通过平流雾和辐射雾时产生的衰减效应特性和反射率进行了分析和讨论，通过分析预测雾衰减系数的常用经验模型，预测了毫米波段电磁波通过平流雾和辐射雾地空路径传播时的衰减特性。

Two kinds of the earthquake waves were adopted in the thesis, i.e. EL-CENTRO wave and Kobe wave.

文中选取了两种天然地震波EL-CENTRO波和Kobe波，用于结构时程分析研究。

The company have the stronger product to develop the ability with produce the ability, and own to automate the wave crest welding equipments, exceed the voice wave to wash the equipments and the product computer test equipment at the same time etc., for the big bus, middling bus, car, miniature car, jeep, engineering car ectype kit.

公司具备较强的产品开发能力和生产能力，同时拥有自动化波峰焊接设备、超声波清洗设备和产品电脑测试设备等，为大巴、中巴、轿车、微型车、吉普车、工程车等车型配套。

It is established that one close channel will be thought in the partial wave cross sections of elastic collision and rotational excitation. Five close channels must be considered in the partial wave cross sections of vibrational and rotational excitation at least.

结果表明：在研究氦氢碰撞体系的弹性碰撞、纯转动激发时，可以只考虑1个闭通道的影响，但在研究振转激发分波截面时，至少要考虑5个闭通道，才能得到比较准确的计算结果。

The elastic wave scattering of a cylinder with inhomogeneous interface properties is studied by use of wave function expansion method.

该文研究了这一问题，通过沿周向的离散化将弹性波散射的边界条件归结为一个超定线性代数方程组。

In thisdissertation,two subjects,which are elastic wave scattering of multiple interfacecylindrical cracks and elastic wave identification method of two dimensional flaw,are mainly investigated.

本文主要针对以下两个方面的问题进行了研究，其一是多个纵向环形界面裂纹的弹性波散射，其二是二维缺陷的弹性波识别方法。

The wave velocities of sandstone samples within ultrasonic frequency band are explained by pore fluid local flow and elastic wave scattering mechanism.

同时测量了超声波频段速度和频率的关系，指出在25KHz-1.2MHz的频率范围内存在一个速度的峰值，局部流机制和弹性散射机制对速度频散同时起作用。

It is also a segment of quantum wave. Nevertheless, depending on its energy, it has its own name – electric quantum wave.

它也是一段量子波，不过根据它能量的差别，它有自己的名字—量子电波。

Methods Ninety-six patients were divided into treatment group (50 cases), which were treated with low frequency electrotherapy combined with ultrashort wave; and control group (46 cases), treated with ultrashort wave only.

将96例病人随机分为2组，治疗组50例，采用温热式低周波配合超短波治疗；对照组46例，单纯采用超短波治疗，2个疗程后观察疗效。

Ultrashort Wave Electrotherapy Machine is an instrument which utilizes high frequency electric energy of ultrashort wave to act on humans organism for treatment.

超短波电疗机是利用超短波的高频电能作用于人的肌体进行治疗的仪器。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。