Based on the special property of magnetic fluid ( mf ) , we fill the magnetic fluid into the working clearances of the servo valve torque motor . one side , the magnetized magnetic fluid can exert a damping torque on the torque motor armature and reduce vibration of the armature ; on the other side , it can improve the magnetic circuit efficiency of the torque motor because of the magnetic fluid ’ s larger magnetic permeability 基于磁流体所具有的特殊性质,将磁流体添加到伺服阀力矩马达的工作间隙中,一方面磁流体被磁化后可增大衔铁的阻尼力,减少振动;另一方面由于力矩马达气隙中磁导率的提高,使气隙中的磁通量增大,力矩马达的磁路效率和输出扭矩将增大,因此可以提高力矩马达的固有频率和伺服阀的响应速度。
But , on the other hand , the industry which operates immediately upon the soil has , as we shall see hereafter , some properties on which many important consequences depend , and which distinguish it from all the subsequent stages of production , whether carried on by the same person or not ; from the industry of the thresher and winnower , as much as from that of the cotton - spinner 但另一方面,我们将看到,直接和土地打交道的劳动,具有某些特殊性质,这些性质会造成很多重要后果,并使这种劳动和所有随后的生产阶段有所区别,不论随后的生产活动是否由同一个人进行,使它既与打谷者和扬谷者的劳动有所区别,又与纺纱工的劳动有所区别。
Meanwhile , adjusting and optimizing the structure of investment distribution on education should be given attention . the innovation of this article are rest with : 1 ) applying granger causal relations methods to test causal relationships between education investment and economy growth ; 2 ) using time series data to built econometrical model , emphasizing education investment ' s long term feature ; 3 ) projecting future developments by arima model 本文主要创新点在于: ( 1 )利用格兰杰因果关系检验确定教育投资与经济增长之间的因果关系; ( 2 )利用时间序列数据进行建模时,着重体现了教育投资的长效性这一重要的特殊性质; ( 3 )利用齐次非平稳过程的arima模型对我国未来教育投资进行了预测。
The unique properties and potential applications of metal nanoparticles are mainly determined by the size and shape . so far there have been many methods to prepare metal nanostructures , but spherical nanoparticles are usually the major products . it is therefore a great challenge to develop some simple and effect methods of synthesizing nanoparticles whose size and shape can be controlled at will 金属纳米粒子的特殊性质和潜在应用与它的尺寸和形状密切相关,迄今人们已发展了许多金属纳米粒子的制备方法,但绝大多数方法的产物皆是球形纳米粒子,如何建立可对目标材料进行人为的尺寸和形状调控的简易方法是一个极具挑战的课题。
Professor che pioneered the chemistry of reactive ruthenium - ligand multiple bonded complexes , which he subsequently used to elucidate the mechanisms of atom and group transfer reactions with organic substrates . he discovered a series of biomimetic chemical reactions applicable to the synthesis of pharmaceuticals and fine chemicals . he also pioneered the photochemistry of phosphorescent metal complexes and synthesized , by photochemical means , novel types of reactive molecules that exhibit unique properties and reactivities unreachable by ground state molecules 支教授创立活性钌多重键配合物化学并用于揭示原子和基团向有机底物转移的反应机理开拓一系列可应用于药物合成和精细化学品合成的仿生物化学反应创立磷光金属配合物光化学,并利用光化学方法合成具有基态分子所无法达到的特殊性质和反应性的新颖物种。
Lots of concrete examples are ( , ) - metrics . and one of fundamental problems in finsler geometry is to find and study finsler metrics with constant ( flag ) curvature . on the basic , we majarly study the following problems in present paper : ( a ) to the property of a class of ( , ) - metrics in which is parallel with respect to riemann metric a and riemann metric a is of constant curvature , we obtain the following theorem4 . 3 let f ( , ) be a positive definite metric on the manifold m ( dimm > 3 ) 在finsler几何中,我们现在已知的finsler度量已经很多了,但大多数具体的例子主要都集中在( , ) ?度量中,又在finsler几何中一个基本的问题就是去发现和研究具有常曲率的finsler度量,基于这些本文主要研究了以下一些问题: ( a )一类关于是平行的并且riemann度量具有常曲率的( , ) ?度量的特殊性质,得到了如下的定理4
The digital signature algorithms with special attributes are studied , and the new digital signature scheme , a undeniable forward - secure digital signature scheme based on zero - knowledge proof , is proposed based on the difficult mathematic problems . it is the first time that the undeniable property and the forward - secure property are combined in a digital signature scheme 以数学中的困难问题为理论基础研究了具有特殊性质的数字签名算法,提出了满足特殊需求的新的数字签名算法- - - -基于零知识证明的不可否认前向安全数字签名算法,首次将不可否认数字签名与前向安全数字签名结合起来。
The state shareholders and managers of the listed company tuned the assets by the lots of unlawful related transactions and break into the benefits of the minority in the practice in china , just reflecting this phenomenon . the lack of effective inner and outsider control mechanism in the holding companies has been one of the most difficult problems in the reform to the state owned enterprises and will be the key to the normal governance corporation in holding companies . although the research to the holding company and the assignment of the control rights has been done a lot , the integration of two conceptions was not paid attention to 本文在参考国内外学者大量文献后,将历史分析与逻辑分析、规范分析与实证分析相结合,对于公司控制权重新加以界定;考虑国有控股公司的特殊性质,对于目前国有控股公司内部和外部的控制权配置机制加以客观分析,指出其中存在的制度缺陷和现实障碍;并且按照国有控股公司控制权优化配置原则,对于公司内部各利益主体之间和内部存在的博弈关系加以解析,以国有控股上市公司为例,解释外部市场环境对于公司控制权配置的实证影响;进一步阐述了优化国有控股公司控制权配置的制度安排和路径选择。