声学

In order to exploit the application of modern design method to fan design, this paper discussed the CFD calculation and groped the theory and practice of CAA.

为了探讨现代设计方法在冷却风扇设计中的应用，本文对冷却风扇的计算流体动力学问题作了一定的探讨，同时，也对计算声学的理论与实践作了一定的摸索。

In the time domain, generation and propagation of aerodynamic noise are simulated using the two-step method and CAA respectively .

在时域内分别采用&两步法&及计算气动声学方法对气动噪声的产生及传播进行了数值模拟。

Acoustic phonetics : the study of the physical properties of speech sounds.

声学语音学，对语音物理属性的研究。

Acoustic phonetics -the study of the physical properties of speech sounds.

声学语音学：研究语音的物理特征。

Newly revised and expanded, Acoustic and Auditory Phonetics provides readers with an accessible yet rigorous introduction to phonetics and speech sciences.

新修订和扩大，声学和听觉语音为读者提供一个公开，尚未实行严格的语音及语音科学。

Acoustic and Auditory Phonetics provides an accessible yet rigorous introduction to basic acoustics, audition, signal processing, and the acoustic theory of speech production.

声学和听觉语音学提供了一个基本的音响，音，信号处理，可访问而严格的引进和生产的讲话声理论。

After long time investment and development, Tianchen Industrial Group Co., Ltd. has its own two manufacturers in Guangzhou and Foshan; and even in Jiangshu, Shandong and Heilungkiang, based on their local material advantages, we have our joint venture manufacturers there.

经过多年的发展，目前天辰实业集团有限公司通过自主投资，在广州、佛山拥有两家专业的声学材料制品厂，在江苏、山东、黑龙江依托当地原材料资源优势，以合资方式建有自身的生产基地。

Ltd. has its own two manufacturers in Guangzhou and Foshan; and even in Jiangshu Shandong and Heilungkiang based on their local material advantages we have our joint venture manufacturers there.

经过多年的发展，目前天辰实业集团有限公司通过自主投资，在广州、佛山拥有两家专业的声学材料制品厂，在江苏、山东、黑龙江依托当地原材料资源优势，以合资方式建有自身的生产基地。

His current project,Knossos,is a unusual blend of middle-eastern instrumentation with dense percussive layers of organic sounds and textured beats.Truly electro-acoustic in nature,the premise of the Knossos sound centers on the manipulation of eastern acoustic instruments with signal processing and ambient distress.Dann lives in the LA area and has worked with Solace, Shaman's Dream,Azam Ali from Vas,and a variety of other diverse musicians in the studio,and in improvised performance.

他现在是一个项目，克的中东和不寻常的敲击的层致密的有机的声音和纹理跳动真正的电声性质，为前提的声音在操作中心岛东声学设备和信号处理和周围的痛苦然后住在洛杉矶地区和曾经与安慰，萨满的梦想，Azam阿里从管，以及其他各种多样的音乐家在工作室，在即兴表演。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。