查询词典 acoustic

The acousic parameters and spectrographic characteristics (harmonic waves,formants and noise) were analyzed.The resubs obtained by acoustic technique were compared with those of perceptual evaluation.Results The acoustic parameters were significantly increased in all patients with laryngeal diseases.

Speech Science for Windows软件对78例正常成人及98例喉病患者元音信号进行检测，对其主要声学参数及声谱图特征(谐波、共振峰、噪声成分等)进行分析，并与主观听觉评价结果进行了比较。

On the basis of a brief analysis on multiple array acoustic log tool XMAC ,the method and principle for the application of multiple array acoustic log in gas reservoir recognition are introduced emphatically,and its application effect is analyzed.

在简要分析了多极阵列声波测井仪 XMAC基本原理的基础上，着重介绍了多极阵列声波测井在气层识别中的应用方法和原理，并对应用效果做了分析。

Only acoustic impedance ratio or acoustic impedance ratio can not control band gaps.

仅以声阻抗比或波速比的大小不能决定带隙的存在和大小。

Extensive foreign accent studies have long recognized the crucial role of second language (L2) prosody to successfully convey linguistic and pragmatic meaning in exchanges with native speakers. However, much less work has been dedicated to the prosodic differences in fundamental frequency (F0), intensity, and duration between Taiwanese advanced English speakers and native English speakers. In order to bridge the gap, the present thesis (1) compares the acoustic features between compounds and phrases,(2) compares the acoustic correlates in English compound and phrasal stress between NNG and NG, and (3) examine if NNG can differentiate compounds from phrases.

中文摘要本研究的所探讨的问题有三个，第一，比较英语复合词及片语重音在声学上的差异，尤其是在重音节上的比较；第二，比较台湾高等英语学习者在英语复合词及片语重音上与以英语为母语的外国人有什麼声学上的差异，此声学上的差异又分为三大类：音高(F0)、音量、音长，下又细分成14个参数；第三，我们也探讨台湾高等英语学习者是否能在声学特质展现区别复合词与片语的现象。

In the second part presented in Chapter 4, the nonlinear kinetic Alfvén wave on the ion acoustic branch was studied, and a new type of the SKAWs on the ion-acoustic velocity branch is discovered in a low-β plasma.

在第二部分，研究了离子声分支上的非线性动力学阿尔文波并发现了在低β等离子体中的一类新型的SKAW。

"The album has both slow and uptempo songs," says Haun. It also reflects my love for a combination of instrumental sounds, especially acoustic piano, acoustic and electric guitars, strings, flute, french horns and saxophones.

&这张专辑的歌曲都是慢歌，而且琅琅上口&， Haun介绍，它同时反应了我对器乐之声进行糅合的偏爱，尤其是对音质钢琴，音质电吉他，弦乐器，笛子，圆喇叭以及萨克斯风声音的编配。

The acoustic correlates of stressed syllable in Chinese is the raising of hight point of the pitch and the lengthening of the duration while there is no significant correlation between these two acoustic parameters.

高音线的起落变化反映了音节的重读程度；低音线的下倾和重置反映了韵律单元的大小和相互包含关系，并且在段落以内，低音线对韵律单元有着组织作用。

Based on a large number of scientific and technical documents, this paper generalizes the basic principles and application status of magnetic acoustic emission and makes a set of experiments by the hardware and software that the author designs, and obverses some typical rules of magnetic acoustic emssion.

铁磁材料都可以用磁声发射法来测量其应力大小，为此，本文在查阅国内外大量相关科技文献资料的基础上，归纳总结了磁声发射技术基本原理和应用状况，用自行设计制作的硬件和软件进行一系列实验，观测到一些典型的MAE现象。

Inunderwater acoustic research specially in shallow-sea acoustic,the scatteringon different rough surface is important factor affecting underwater environmentand background.

粗糙表面声散射在很多领域均有重要的应用，水声研究中尤其是浅海声学的研究，各种粗糙界面的散射更是影响水下环境和背景的重要因素。

In summary, various key experimental conditions in electron acoustic imaging of ferroelectric domains were systematically studied. The optimum experimental conditions to obtain EAI of domains with good quality and the factors important to image analysis have been presented. The piezoelectric vibrator model and calculation of motion equation are helpful for explaining the imaging mechanism and related experimental phenomena. The sample holder with variable electric field was designed. The domain movement of BaTiO〓 ceramics and crystal under lateral and longitudinal applied electric field and domain movement of PMN-PT crystal under longitudinal poling electric field were observed. The application of SEAM on revealing of ferroelastic domains, imaging of residual stress distribution in ceramics coatings and around the pores on the surface of ferroelectric ceramic composite have been reported respectively. All these works enriched the study of electron acoustic imaging and extended the application of SEAM in the characterization of materials.

综上所述，本文系统地研究了各项关键实验条件对电畴电声成像的影响，指出了获得最佳畴结构电声像的条件和成像分析中应当考虑的各种影响因素；提出了解释电畴电声成像的压电振子模型，在此基础上推导并求解了压电振子运动方程，并对一些实验现象作出了解释；成功地设计了可变电场的样品台，观察了BaTiO〓陶瓷和晶体在横向电场作用下的畴运动，PMN-PT晶体在纵向极化电场作用下的畴运动；探索了电声显微镜在铁弹畴成像，陶瓷涂层应力观察，陶瓷自然表面气孔周围应力成像的应用，这些研究，丰富了电声成像的学术内涵，拓展了电声显微镜的应用领域。

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。