查询词典 acoustic

At first, an analysis on the realistic importance of the temperature field monitoring has been given, as well as the fundamental and the development of acoustic thermometry has been introduced in the paper.

首先，对温度场监测的现实意义进行了分析，并介绍了温度场声学测量方法的原理及发展情况。

Objective To develop one tissue mimicking phantom which can be used to evaluate the focusing performance of the HIFU energy transducer, and the phantom should have the same acoustic characteristics and thermotics characteristics as the biological tissues.

目的 建立一种用于评价高强度聚焦超声在组织中的聚焦性能、与生物组织的声学特性和热学性质一致的仿组织体模。

The inner pressure was changed to 2 kPa and 4 kPa below normal atmospheric pressure in 50 s and recovered to the normal pressure, the pure tune hearing threshold of 500, 1 000 and 2 000 Hz and tympanic pressure were measured, and acoustic impedance curve characteristic and tympanic membrane appearance were recorded at each time points.

结果当大气压低于正常值2kPa时，受试者言语频率的纯音听阈显著提高（均P〈0.01），鼓室压力值发生显著改变（P〈0.05）；当大气压低于正常值4kPa时，受试者500、2000Hz的纯音听阈显著提高（P〈0.01和P〈0.05），鼓室压力值发生显著改变（P〈0.01）。

MethodsTwenty volunteers with normal hearing level and tympanic pressure were enrolled and kept at airtight container. The inner pressure was changed to 2 kPa and 4 kPa below normal atmospheric pressure in 50 s and recovered to the normal pressure, the pure tune hearing threshold of 500, 1 000 and 2 000 Hz and tympanic pressure were measured, and acoustic impedance curve characteristic and tympanic membrane appearance were recorded at each time points.

方法选取听力和鼓室压力正常的受试者20例，即单耳40耳，评估其于50s改变密闭模拟电梯容器压力低于正常大气压2kPa、50s改变密闭容器压力低于正常大气压4kPa、以及压力恢复至正常水平时，言语频率500、1000、2000Hz的纯音听阈，鼓室压值和声阻抗曲线图形形态，以及鼓膜形态。

To achieve the high axial resolution,time slice is applied to an imaging system using acoustic holography.

在这个研究中将时间片应用到感音全息摄影的图像系统中，从而得到较高的轴向分辨率。

My hand drum to one's heart's content sings, happy song acoustic shock mountains and rivers.

草原盛开幸福花，花开千万朵。2。打起手鼓唱起歌，我骑着马儿跨江河。

The principle and the development status of temperature field measurement by acoustic tomography are introduced in this thesis.

本文介绍了声学温度场检测技术的基本理论、发展现状。

To solve the compensation problem for nonlinear transformation of acoustic model parameter in noisy environment,Parallel Model Compensation and Vector Taylor Series compensation are two mainly used model parameter compensation methods which can only reach accuracy of first order linear approximation.

首先，本文介绍了我们所提出一种新的语音声学模型在噪声环境下的参数补偿算法—UT变换补偿算法。

The statistical theory and Hilbert-Huang transformation were used to analyze the flame acoustic signals in time and frequency domains.

应用统计理论和Hilbert-Huang变换对炉内火焰声学信号分别进行了时域和频域的分析。

When finding the moving target in the acoustic sensor network, a moving agent is generated to triangulate the target's position.

就无线传感器网络中的目标追踪问题而言，减少传感器之间的冲突、提高追踪精度是两个重要问题。

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。