声学上

In this paper, the new idea simultaneously using the Planar Laser Induced Fluorescence technique and the Acoustic Doppler Velocimeter technique is applied to research the coherent structure of turbulent boundary layer.

本文在评述紊流边界层拟序结构研究现状的基础上，受前人研究工作的启发，提出了使用平面激光诱导荧光技术与声学多普勒测速技术相结合的方法同步观测和研究紊流边界层拟序结构的新思路。

The soundscape evaluation focuses on the effects of various acoustical, environmental, social, demographical, psychological, cultural and behavioural factors, as well as the main factors that characterise the soundscape, and the investigations are mainly based on the soundscape surveys in Europe and China.

其中声景评价重点研究各种声学、环境、社会、人口、心理、文化和行为因素对声景质量的影响，以及描述声景的主要因素，这部分研究主要建立在一系列在欧洲和中国进行的声景调查的基础上。

In the Sixth Chapter, the Wavelet analysis method is introduced in discussing some acoustic imaging problems related to the physical background of the ultrasonic detection. In the light of the solution of some theoretical problem in the 2D Wavelet transmission of two components form, the enhancement and identification of the spotty and fibriform faults of the acoutic image, along with two acoustic image deblurring methods based respectively on the acoustic physical feature analysis and the acoustic image's spatial feature analysis of the object, are realized. Therefore the image degeneration problem resulting from the acoustic beam diffusion or the acoustic focus diffusion in the ultrasonic detection are effectively improved. The software for this purpose has also been developed.

第六章首次应用小波分析的方法，研究了与超声检测的物理背景有关的一些声象处理问题，在解决了二分量形式的二维小波变换中的一些理论问题的基础上，建立起了对声象中点状和线状缺陷目标的增强与分离方法，以及分别基于目标的声学物理特征分析和基于目标声象空间特征分析的二种声象弥散消除方法，实验分析结果表明，这种方法较好地解决了超声检测中由于声束截面或声焦点扩散所造成的成象退化问题。

Through the experiment results, in different phonation model, analysis the properties of glottal vocal efficiency, vocal folds vibration, and voice source.

我们在对嗓音—呼吸系统进行自动分割与分段特征表达的目标指引下，建立了具有国内一流水平的嗓音声学实验室；从概念上对嗓音—呼吸系统重新划分，以声门为中心分别建立去耦合和弱耦合条件下的嗓音—呼吸系统和肺胸系统数学模型；采用离体犬喉作为声带振动的物理模型，对数学模型进行完善与证实；采用盲解卷技术在去耦合和弱耦合条件下，提取上下声道传递函数、嗓音源和发声效率，研究上下声道去耦合和弱耦合条件下不同发声方式与状态对发声效率的影响。

Frequency modulation; frequency processing; echolocating; odontocete cetaceans; ultrasound; bioacoustics; sound localization; midbrain; binaural; mesencephalon; auditory cortex; clicks; auditory evoked potentials; inferior colliculus; superior colliculus

调频；频率处理；凭回声定位的方向；odontocete cetaceans；超声；生物声学；声源测定；中脑；两耳的；中脑；听觉皮层；棘爪；听觉诱发电位；下丘；上丘

This study deals with many branches of modern mechanics, such as structural dynamics, damage mechanics as well as coupling of multi-media and multi-fields. Therefore, the research on structural dynamic properties and underwater acoustic properties of intact and delaminated composite plate structures is not only of great theoretical importance but also of practical value.

舰艇声纳导流罩的动力特性和声特性结构上涉及到复合材料结构动力学、损伤力学以及多介质、多场耦合力系等近代力学分支，因此，健康和分层损伤复合材料层合板结构动力特性和水中声学特性研究的课题，既有重要的理论研究的意义，也具有实际工程价值。

This algorithm quantizes the wavelet coefficients to different region according to the watermarking bit to be embedded, and introduce the features of human auditory system to gain the proper quantization step. In the detection, it uses threshold judgment to achieve blind detection.

该算法仍在小波域上进行，根据不同的水印信息将小波系数量化到不同的区间，并根据心理声学模型的一个结论讨论了量化步长的选择，检测时用门限判别实现了盲检测。

The first one is to use phonetic analysis to delimit the vowel formant ranges of and allophonic and then we categorize the vowels which perceptually sound like 's according to the vowel formant ranges.

三种方法分别为：第一，利用声学中母音共振峰来找出/u/和/o/的共振峰范围，根据这一范围，进而将听觉上认为是/o/的音归类，结果发现仍有包含/o/的字。

The test piece is connected to the acoustic driver and an anechoic termination through two straight pipes.

待测试的声学元件通过两端很短的直管连上白噪声发生器和消声末端。

That isn't to say that Linstead plays the acoustic guitar exclusively on-stage or in the studio; while the acoustic guitar is his primary instrument, Linstead also plays mandolin, violin, bass, acoustic piano, electric keyboards, various wooden flutes, and the bouzouki (a traditional Greek string instrument).

这就是说，Linstead只在舞台上或录音棚里演奏非电声吉他；虽然非电声吉他是Linstead主要演奏的乐器，他也演奏曼陀林、小提琴、贝斯、声学钢琴、电声键盘、各种木笛，以及布祖基琴。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。