查询词典 mechanics

The study of operator algebra theory began in 30s of the 20th century: With thefast development of the theory, now it has become a hot branch playing the role ofan initiator in modern mathematics. It has unexpected relations and inter infiltrationswith quantum mechanics, noncommutative geometry, linear system and control theory,number theory as well as some other important branches of mathematics.

算子代数理论产生于20世纪30年代，随着这一理论的迅速发展，它已成为现代数学的一个热门分支，它与量子力学，非交换几何，线性系统和控制理论，数论以及其它一些数学分支有着出人意料的联系和相互渗透。

Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China

上海大学材料科学与工程学院，上海 200072

Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800, China

中国科学院上海光学精密机械研究所，上海 201800

A large number of results from the study indicate that there is a close connection between stock price and trading volume. This paper uses econometric tools, draws on the plasticity and elastic conceptions in the mechanics fields and considers the relation between stock prices and trading volume in different aspects, in order to set up complete stock price plasticity and elasticity theory and apply this theory by carrying on empirical researches.

首先，本文介绍了股价波动的塑性和弹性理论的思想来源，定义股票均衡价格、股价塑性、股价弹性等新概念，通过选取某些个股在不同时段上的股价和成交量的走势图，分别说明了塑性和弹性现象的存在；然后建立了股价的塑性模型、弹性模型及弹塑性交叉模型，应用计量经济学方法对这些模型进行参数估计和检验，对模型进行理论解释，分析模型与现有投资分析理论的一致性；最后是对股票价格塑性模型和弹性模型的应用研究。

There are two clinical observations that we have made relative to orthodontic treatment mechanics.

有两例临床观察，我们已经取得相对正畸治疗力学。

This paper studies on the fluctuating pressure time-history identification with the background of this system, and the fluctuating wind pressure on the roof of Shenzhen citizen center is identified. In this paper, we do some research in mechanics on the proper orthogonal decomposition method.

本文对荷载本征模态分解法进行了机理性研究，对不同的插值方法、不同的结构体形以及选择不同阶数的模态进行风压识别对识别结果的影响进行了细致的分析。

In this paper,a systematic analysis is made on several existing conventional laboratory and field experimental methods of ascertaining the orthotropy for rock mechanics properties.

系统分析了目前常用的几种确定岩石力学性质正交各向异性的室内外实验方法，指出了每种方法的优点和不足之处。

Rock mechanics ; orthotropy ; experimental method ; true triaxiality ; cross-multipole array acoustilog

岩石力学；各向异性；实验方法；真三轴；偶极声波测井

Department of Osteology, General Hospital of Air Force of Chinese PLA, Beijing 100036, China; Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing 100102, China; Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

解放军空军总医院正骨科，北京市 100036；中国中医科学院望京医院，北京市 100102；清华大学工程力学系，北京市 100084

In this thesis we considered the basic mechanics of the semicircular canals and the otolith organs, respectively.

当前，由于航天技术，特别是载人飞船技术的发展，有关前庭系统动力响应的研究，正日益引起各国学者的极大兴趣和关注。

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。