和声学

Based on＂The Data Bank System of the Standard Phonetic Features of Different Level in PSC＂, the thesis analyzes the variants of affricative versus fricative in syllables: z, c ,s - zh, ch, sh - j, q, x which are obscure in physiology; analyzes timbre phonetic variants aroused from the different match of seven main simple vowels and initials as well as the tonal patterns with the help of drawing the synthetic spectrograph and pitch spectrograph. So that the data can be offered to describe phonemes in 396 syllables in common use according to the acoustic analysis.

本文在"普通话水平测试各等级标准语言特征数据库系统"的支持下，通过制作396个常用音节语音样本的音高图和综合语图，考察在普通话教学和测试中从生理角度难以准确把握的一组仅有细微差异的塞擦音和擦音声母z、c、s-zh、ch、sh-j、q、x在音节拼合中的变体；考察7个主要单元音在与不同声母拼合构成的音节中音质上的变化模式；考察四个声调的变化形式，力图从语音声学物理特征角度的分析中为普通话常用音节音位语音规范度的描写提供客观的数据说明。

Spectral element methods for partial differencial equation is introduced in this study from viewpoint of the collocation approximation of Chebyshev polynomial. Wave Equation and its space discretization are deduced. Two time integral methods, central difference method and implicit Newmark method, are introduced, and their stability and applicability are also discussed in some details. The significance of absorbing boundary conditions in spectral element methods for Aeroacoustics is explained, and Clayton-Engquist-Majda absorbing boundary conditions is emphasized and introduced, then the discrete scheme of this boundary conditions is deduced and applied to spectral element methods for wave equation.

本文从Chebyshev多项式逼近理论出发，详细介绍了谱元方法求解偏微分方程的过程；推导了流体中的声波动方程并在空间上对其进行了谱元离散；详细讨论了两种时间积分方法──中心差分法和Newmark方法，分析了它们的稳定性条件，并从理论上对比了两种方法的优缺点和适用范围；将吸收边界条件推广应用于谱元方法求解气动声学问题中，重点介绍了Clayton-Engquist-Majda吸收边界条件的原理和公式，推导了该吸收边界条件的变分形式，并将其引入波动方程的离散形式中。

Mechanical vibrations and mechanical wave as important knowledge in physics, it is not only the key content ...

机械振动和机械波是"复合概念"，本身包含着众多子概念，又把力学和运动学的诸多概念和知识综合应用于其中，同时在力学、电磁波、声学，甚至原子和量子理论中又都有着广泛的应用。

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。

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。

Phys. The science of matter and energy and of interactions between the two, grouped in traditional fields such as acoustics, optics, mechanics, thermodynamics, and electromagnetism, as well as in modern extensions including atomic and nuclear physics, cryogenics, solid-state physics, particle physics, and plasma physics.

物理，物理学：有关物质和能量及两者之间相互作用的科学，传统上分为声学、光学、机械学、热力学和电磁学，现今又扩展到包括原子物理、核物理、低温学、固体物理学、微粒物理学和等离子体物理学

The phylogeny and applied prospect of MES are summarized in the paper. The principle of this system is analyzed from the point of view of acoustics. The surveying and filtering technology of auxiliary parameters, sounding data and the theory of image form, backscatter strength data processing, are researched deeply in the paper. The optimal model of velocity of sound is given. For sound ray tracing, some methods of correction of sound ray curve are developed. At the same time, an ideal model of sound ray tracing is proved and given. The GPS technology is applied for the determination of tide, attitude of vessel. Moreover, some methods are given. As an important topic, the systematic error is discussed in the paper. Some filtering methods are researched in this paper. Based on the current methods of image processing, the procedure and methods are tested and given that adapt to sonar image processing.

本文研究的工作是在总结多波束声纳测深系统的发展历史、应用前景的基础上，从声学角度分析了多波束系统的工作原理；对多波束辅助参数的测定和滤波方法、测深数据的滤波方法、多波束声纳图像的形成机理、图像处理以及最终应用等作了比较深入的研究；得出了适合于多波束精密深度计算的最优声速模型和声线改正模型；提出了 GPS 载波相位定位技术用于多波束辅助参数测量的思想、算法，改善了多波束系统的作业模式；系统地分析了深度数据的误差来源和类型，首次将系统误差作为影响测深精度的主要因素给以研究，并给出了削弱系统误差的方法，提高了深度数据的质量；对多波束声纳图像的形成、处理方法进行了细致的研究，给出了适合多波束图像处理的算法和流程，并从理论和实践上对声纳图像的应用进行了比较全面的研究。

The dissertation contains three chapters: Chapter One Phonetic Study On Tones and Tone Sandhis At first, the author introduces the traditional dialectological description and analysis on the tones and tone sandhis of the Shanghai dialect.

先介绍传统方言学对上海方言声调的描写与分析，再用现代语音学的方法，对上海方言的单音节声调和两类双音节连读变调的声学特性（基频F0和时长）作出描写和分析。

One, serve as a signal generator with computer, the software of COOLEDIT of sine sound wave that produces a standard is software of the acoustic frequency processing with a kind of powerful function and editor, it can be generated, broadcast the voice that with transcribe we need, the weaveform that can show phonate news undertakes study for us, be acoustics research and acoustic frequency processing

一、用电脑作为信号发生器，产生标准的正弦声波COOLEDIT 软件是一种功能强大的声频处理和编辑软件，它可以生成、播放和录制我们所需要的声音，并可以显示出声音的波形供我们进行探究，是声学探究和声频处理的得

Using the results of photographical experiment,analyzing the development of combustion and building two parts in chamber. By the characters of two parts of chamber,establishing time model.

基于已燃区和未燃区等燃烧特征，建立声学时域计算模型，开展单点和多点激励状态下的燃烧室压力波瞬态响应计算，研究燃烧室压力场的时域特性和变化规律。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。