声学的

After the analysis of the algorithms model of MPEG-2 AAC, the thesis optimizes some blocks with great computation of Psychoacoustic Model, Filter banks and Quantization coding, etc. It omits some function blocks which have much computation and avail little to the gain of coding, for example, prediction in time domain, TNS, etc. It also adopts some fast algorithms to reconstruct some model for the reason of real time characteristic.

在对 MPEG-2 AAC算法模型进行分析之后，对心理声学模型，滤波器组和量化编码模块等计算量较大的模块进行优化，同时也省略了部分运算量大但对编码效果增益不明显的几个模块，如时域预测和 TNS 等，并使用了一些快速计算技术对算法模型进行实时化改造。

Based on the requirement of the multifunctional gymnasiums, this article expatiates theoretically and practically on the acoustic design.

本文既是根据现在多功能体育馆的使用要求，从理论、实践两方面介绍了体育馆的声学设计—包括建声设计和电声设计两方面。

voice acoustic analysis and EGG can provide an objective quantized index for the diagnosis of laryngeal carcinoma.

嗓音声学分析和电声门图可为喉癌的诊断提供客观的量化依据。

This may have been improved following the modernisation refits of the submarine in the late 1990s, which saw the surface of the submarine being covered with acoustic tiles to reduce the acoustic signature, and the introduction of the more advanced wire-guided anti-submarine torpedo and possibly submarine-launched YJ-8 anti-ship missile too.

这可能已经随着潜艇在1990年后期中的现代化改装中被改进，看到潜艇表面覆盖消声瓦减少声学特征，引进更先进的线导反潜鱼雷和也可能有潜射YJ-8反舰导弹。

The acoustic phased arc array transmitter can be used in azimuthal acoustic reflection logging. It evaluates the azimuthal variation of borehole formation acoustic properties, which is useful for complex reservoir recognition and evaluation.

这种相控圆弧阵声波辐射器用于方位反射声波测井新技术中，可评价井旁地层声学性质沿井周方向的变化，有助于复杂油气藏的识别和评价。

The acoustic phased arc array transmitter can be used in azimuth acoustic reflection logging and evaluate the azimuth variation of acoustic properties in the borehole formation and also be useful for complex reservoir recognition and evaluation.

这种相控圆弧阵声波辐射器可用于方位反射声波测井新技术中，能评价井旁地层声学性质沿井周方向的变化，有助于复杂油气藏的识别和评价。

Numerical simulation of the discrete noise in an axial-flow fan was performed by utilizing the method of CFD in conjunction with CAA.

采用计算流体动力学和计算声学相结合的方法，对轴流式通风机的离散噪声进行了数值模拟。

The characteristics of evoked-call from DM were studied by the methods of electrophysiology and acoustics in bramble finch.

应用电生理与声学分析相结合的方法研究鸣禽鸟燕雀DM核团对声音调控的模式。

This thesis focuses on two main issues of acoustic echo cancellation, namely the adaptation algorithm and the control of adaptation in double talk situation presents all the theory backgrounds.

本文重点的两个主题是声学回声消除技术，也就是在双重谈话的情况下，回声过滤器适应算法和适应控制。

The straight line may pass through the center of the dust cover of each acoustic driver.

所述直线可以经过每个声学驱动器的防尘罩的中心。

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。