声学上

Combination of room acoustics characteristics of the different sub-band FIR filter length filtering, limited resources in a more rational distribution, saving resources and computation, and to some extent improve the convergence rate.

结合房间声学的特点，对各子带采用不同长度的FIR 滤波器进行滤波，将有限的资源进行更合理的分配，节省了资源和计算量，并在一定程度上提高了收敛速度。

5%sonicated human albumin could enhance the resolution of left ventricular endocardium,has little side effect and will be appropriate for clinical use.

5%声振人血白蛋白注射液经静脉声学造影的左心显影效果显著，耐受性良好，适合在临床上应用。

On average, teachers using it increased the time they taught reading skills like funnies and vocabulary.

平均上，教师用它来增加教阅读技巧的时间，如：声学和词汇。

Focusing on the problem of the nature of the high velocity surface acousticsmode,we investigate the standard of judging which a wave is a surface wave,present the Green function of a pseudo-SAWand a longitudinal-wave headwave,thus developing the theory for generalized Green's function of surfaceexcitation of a piezoelectric crystal,with the hope to systematize this theory.

本文围绕压电晶体半空间上的高速表面声学模式热点问题，对表面波模式进行了界定，又发展了压电晶体表面激发的Green函数理论，给出了伪表面波及纵波头波的Green函数，从而形成更完整的压电晶体表面激发理论系统。

Surrounded and lifted up by the storied past or the harmonics of hand-me-down fiddles, banjos, mandolins, hammered dulcimers and guitars, each hardtack generation has been inspired and nurtured by the melodic expression of an ancient mountain region – Appalachia.

包围而且被传说上有名者举起越过或者现成小提琴、班卓琴、曼陀林、被槌打的德西马琴和吉他的和声学，每个硬面饼世代已经被远古山区域－阿帕拉契山区的有旋律表达激发而且养育。

This paper presents the methods to improve the performance of mispronunciation detection at syllable level for Mandarin Chinese from two aspects: introducing the speaker adaptive training and the selective maximum likelihood linear regression to get a better acoustic statistical model, and proposing speaker normalization backend because of the limited information and the different rating level for the different pronunciation level.

该文一方面为了获得对于发音错误检测更好的声学模型，引入了说话人自适应训练和选择性最大似然线性回归技术；另一方面，由于字发音检错中存在严重的信息量不足问题和专家对于不同水平说话人的评价标注不一样，在后端上加入了话者得分归一化技术。

Based on this, a new WENO difference scheme which based on Dispersion-Relation-Preserving relation is developed, and representative test cases with this scheme for computational aeroacoustics problems has been implemented and compared in order to test capability of wave capturing; In addition, WENO schemes generally do not converge at high order in the presence of contact discontinuity of Euler equations, so a conservative front tracking technique coupling WENO schemes and Level Set method to simulate the translating density profile is presented here, and numerical simulation with this technique for representative test case has been implemented and results show the desired accuracy.

本文研究了高阶精度加权基本无振荡格式及其在双曲守恒律方程中的应用，在此基础上作了两个方面的工作：一是针对高频声波问题构造出一种基于保色散关系的WENO有限差分格式，并对计算气动声学问题的代表性算例进行了大量数值实验，比较了该格式捕捉波数的能力；另外，针对高阶WENO格式在处理Euler方程的接触间断时精度有所降低的问题，研究了利用界面追踪技术Level Set方法和高阶激波捕捉WENO格式相结合的一种守恒追踪方法，并且给出有代表性的密度滑移面问题的算例，得到一致高阶精度的数值模拟结果。

of A Dissertation on Chinese Traditinal Music Theory Chinese Dong Xiao Flute Music Culture: A Study Based on previous studies (particularly the findings and methods derived from archaeology, ethnology, the study of temperament, organology and acoustics), this dissertation endeavours to conduct a thorough and systematic investigation of the music culture surrounding the Chinese end-blown flute dongxiao.

中国洞箫音乐文化研究本文在以往学者研究成果的基础上，借鉴与本课题有关的考古学、民俗学、律学、乐器学、声学之成果与研究方法，对中国洞萧。。。

It gives up the unreasonable spherical hypothesis which is out of accord with the reality.

考察了不同壁面、空泡离壁面的距离和空泡的气体含量对空泡演化及辐射噪声的影响，该方法将边界元方法得到的空泡演化情况与声学方程在特殊情况下的解结合起来，放弃理论分析上不合理的球形假设，并考虑了边界的影响，这样更符合实际的空化现象，得到了与实验相一致的结论。

The worst type of room shape is a perfect cube - say, ten feet long, ten feet wide, and ten feet high - because all three dimensions are the same and all three dimensions resonate at the same frequency.

对于声学效果来说，最差的房间形状是完美的立方体——举例说就是长宽高都是10英尺，因为长宽高三个方向的距离都相等，所以三个方向上的共振频率都相同。

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。