查询词典 acoustic

The results shown that, for the typical kind of photonic crystal fibers with hexagonally arrayed circular air holes, the band gap of acoustic wave of XY mode appears only when the air holes' filling rate is greater than certain threshold value, and the upper and lower boundary values of the band gap decrease with the increasing of the air holes' filling rate.

结果表明，对于较为常见的空气孔排列为六角密排结构、空气孔形状为圆形的实芯光子晶体光纤，只有当空气孔的填充率大于一定阈值时才出现较明显的XY模态声波的带隙，并且最低与次低带隙的上下边界均随空气孔的填充率的增大而下降。

Objective:To investigate the relationship between acoustic analysis and auditory assessment of hoarseness.

目的：探讨嗓音声学分析参数与声嘶程度心理听觉评价之间的关系。

In this model, the monitored acoustic emission information is changed into prediction data based on the gray theory, and the Prediction data are trans-formed into an essential format of cusp catastrophic model via the least-square principle curve fitting and the differential coefficient homeomorphous change.

首先运用灰色理论对声发射监测数据进行处理，得到预测数据，运用最小二乘曲线拟合展开，再通过微分同胚变换，转换为尖点突变模型的基本形式，从而建立了灰色突变预测模型。

Firstly, data processing method based on gray theory is used to change acoustic emission information into prediction data. Then prediction data is transformed into essential format of cusp catastrophic model by the least squares principle curve fitting and differential coefficient homeomorphous change. Finally, the gray and catastrophic prediction model is put forward to forecast failure time of rock slope.

首先运用灰色理论对声发射监测数据进行处理，得到预测数据，运用最小二乘曲线拟合展开，再运用微分同胚变换，转换为尖点突变模型的基本形式，建立灰色突变预测预报模型，从而对崩塌的时间进行预报。

A novel passive homodyne fiber-optic hydrophone of acoustic low-pass filtering.

一种具有声低通滤波特性的无源零差光纤水听器。

Lopez does an outstanding job of contributing this guitar work on this acoustic set and is able to make runs over the scales and through improvisatory passages at extreme speed without missing a note.

Lopez在这个器乐组合里出色的演奏了吉他，并且能够猛然跨越音阶，不出差错的急速奏完即兴段落。

Chirp trains are induced by simulated predator attacks and precede or accompany the secretion of a defensive chemical from integumental bristles, supporting our hypothesis that these sounds function in acoustic aposematism.

一系列的敲击声可由模拟捕食者的攻击而引发，表皮的刺毛会同时或或在敲击声后分泌防御性化学物质，支持作者认为此行为是声音的警戒行为之假说。

Acoustic emission as a method of measuring ground stresses has aroused increasing interset.

基金项目：胜利油田有限公司、中石化、国家&十五&科技攻关项目(2001BA605A09 11)。

This one-way wave equation fits eikonal equation and transport equation corresponding to full acoustic wave equation in travel-time and first order amplitude. According to the perturbation theory often used in inverse solution, we split the velocity field into intraformational constant velocity background and variable velocity disturbance. Then we calculate time-shift quantity of migration and amplitude correction coefficients for wavefield depth continuation in total uniform formation and each formation.

基于反问题求解中常用的摄动理论，把速度场分裂为层内常速背景和变速扰动，求得整个均匀层波场深度延拓的偏移时移量及振幅校正系数、各层的偏移时移量及振幅校正系数，从而得到一个基于傅里叶有限差分法的双域保幅叠前深度偏移算子方程。

The anomalies reflecting to landslide are in accordance with the other monitoring information such as acoustic emission of rocks . So , it can be easily concluded that the AIA algorithm could be used to compress the monitoring data with higher data density and lower redundancy and irrelevancy .

这些异常信息所反映的滑坡变形发展演化规律与滑坡声发射等其他监测信息所反映的规律基本保持一致，说明应用人工免疫算法对滑坡位移监测数据进行压缩处理可以在保持原有数据的特性与规律的同时，有效除去监测数据中的冗余与不相关信息，增加有效数据密度，有利于准确提取滑坡异常信息。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。