声学

In Fabry-Pabry quantum structure, thetransmission coefficient show approximate periodicity as a function of geometric param-eters. The quantized thermal conductance does not appears due to the fact that hard-wallboundary conditions are applied in the structure.

应用散射矩阵方法，研究了低温下双缝量子结构和法布里-帕罗量子结构中的声学声子弹道输运和热导性质，计算结果表明：由于声子在输运过程中经过多重反射，这两种量子结构中的透射系数和热导都很小。

Objective To study the acoustic parameters of normal adults in 4 phonation modes.

目的 研究正常成人在四种发声方式下各声学参数的变化。

The third movement is one of Borodin's most brilliant gossamer scherzos, making effective use of harmonics and left-hand pizzicato, and the finale is rhythmically energetic.

第三乐章是鲍罗丁最华丽和轻柔的谐谑曲，充分的运用了和声学和左手的拨奏。终乐章在节奏上充满活力。

The word-to-sound rule and the structure of a speech database are modified during the implementation of TTS system, and then a filter algorithm based on part-of-speech is proposed to solve the polyphone problem. Prosodic research on Chinese characters plays a great role in speech recognition and speech synthesis system. In order to improve the naturalness of a speech synthesis system, the relationship among the sentence structure, the length of a sentence and the breath boundaries is analyzed and a breath boundary assigning algorithm based on such relationship is put forward. In addition, the author analyzes the process of a speech synthesis system and builds a prosodic markup language suitable for Chinese speech synthesis.

呼吸群边界划分作为汉语韵律的一种表现方式，它在语音感知和文语转换系统的性能方面起着十分重要的作用，作者在对汉语句法结构、句子长度和和呼吸群划分之间关系的研究基础上，设计并实现了基于句子长度和句法结构的呼吸群边界划分算法；为更好地描述文语转换过程，作者提出了适合汉语语音合成的SSML韵律标注语言，该标注语言不仅从声学层上对语音的韵律进行描述，而且从语言学层上标注句法结构信息，最后本文对基于语言理解的韵律规则用SSML进行了描述并用实验验证了语言学层面的标注对系统自然度的影响。

The acoustic phonon deformation potential scattering is also important at lower temperatures.

温度较低时，声学波压电散射对电子迁移率的影响较大。

In this case, different gases ensure different acoustic responses with values of approximately 50 ppm.

这种情形下，不同的气体肯定有不同的声学反应，反应值大约在百万分之五十。

Based on the fundamentals presented in the part Ⅰ, this part of the paper,focused on the experimen tal analysis in contrast with the acoustic characteristics of boilover premonitory noise and the typical fire field environment noise, and a set of speci...

本文则在第一部分的理论基础之上，重点分析了扬沸前兆噪声和典型火灾现场环境噪声的声学特性，从其中寻找出能有效地进行扬沸火灾监测预报的一些特征物理量。

Then the developments of the thermoacoustic machine are reviewed. The thermoacoustic theory is introduced from different points of view. Two typical style of thermoacoustic engine are discussed, followed by thermodynamic circle, principal equations, fluid network principle and oscillation theory.

本文简要回顾了热声学的历史和研究现状，并从几个不同的角度对热声机械的基本原理进行了简要介绍，接着对二种典型形式的热声发动机装置进行了介绍，然后介绍了热声热机的热力循环、基本方程以及流体网络理论和振动理论。

The acoustic modes of phonons dispersion relation are probability of the vector q , and their group velocities in the [001] direction are vL = 5.1k m /s and vT = 3.6 km /s, respectively.

声子谱中的声学模式在低频区与波矢成线性关系的，它们沿[001]方向声速分别为vL = 5.1k m /s和vT = 3.6 km /s。

Based on the acoustic analysis of broadcast speech, this thesis builds up a prosodic model for synthesis Chinese.

4详细介绍为汉语文语转换系统建立的韵律模型，以及为建立该模型所进行的广播言语声学特征的研究。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。