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基准
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  standard
    Recent Progress in the Experiment of Primary Cesium Beam Frequency Standard with New Dipole Beam Optics System
    铯束基准上使用新二极束光学实验的最新进展
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    The Development of the Cesium Beam Frequency Standard Cs-Ⅲ
    铯原子束频率基准 Cs-Ⅲ的研制
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    A New National Temrerature Standard in the Range of 419.527 to 961.78℃
    419.527~961.78℃范围新的国家温度基准
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    A New Type of Loading Ram-Cylinder System by Using Hydrostatic Lubrication Technique in 20 MN Force Standard Machine
    用于20MN基准测力机的新型静压润滑缸塞系统
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    Study of Moire Fringe Electrical Interpolation in Angle Standard
    角度基准中莫尔条纹细分的研究
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  “基准”译为未确定词的双语例句
    Manufacture of High Precision Standardmesh Plate
    200毫米×200毫米高精度格网基准板的研制
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    The National Primary Standards of Temperature for the Range From 1.2K to 273.16K on ITS-90
    建立1.2—273.16K范围1990国际温标(ITS-90)国家温度基准
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    Development of laser beacon
    激光基准信标仪的研制
短句来源
    The design of optical system of the laser beacon
    激光基准信标仪光学系统的设计
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    The Signal Criterion and Direct Current Noise in Application of Electromagnetic Flowmeter
    电磁流量计应用中的信号基准与直流噪声
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  standard
The method applies to the standard arithmetic subgroups ofSO(n,1) (a case which was proved previously by Millson [Mi]), to the non-arithmetic lattices inSO(n,1) constructed by Gromov and Piatetski-Shapiro [GPS] and to groups generated by reflections.
      
A new approach to standard monomial theory for classical groups
      
As an immediate application we obtain a new proof of the main theorem of standard monomial theory for classical groups.
      
There are two well known combinatorial tools in the representation theory ofSLn, the semi-standard Young tableaux and the Gelfand-Tsetlin patterns.
      
Fr?nsdal [Fr1, Fr2] made a penetrating observation that both of them are quasi-Hopf algebras, obtained by twisting the standard quantum affine algebraUq(g).
      
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This paper gives a summary about the equipments and experimental results of photometric primary standard of China. A method has been found for reducing the luminance fluctuation of the freezing platinum blackbody. The fluctuation may be reduced to within±0.3% from one freezing to the another one. The luminance of the blackbody at platinum freezing point is agreeable to that at melting point within 0.2%. From the experience with platinum ingot No.2, it was not found to be contaminated after using over three hundred...

This paper gives a summary about the equipments and experimental results of photometric primary standard of China. A method has been found for reducing the luminance fluctuation of the freezing platinum blackbody. The fluctuation may be reduced to within±0.3% from one freezing to the another one. The luminance of the blackbody at platinum freezing point is agreeable to that at melting point within 0.2%. From the experience with platinum ingot No.2, it was not found to be contaminated after using over three hundred times. The total uncertainty of the photometric primary standard is ±0.33%.

本文简要叙述建立光度基准的实验装置和实验结果。说明减小铂凝固点黑体的光亮度起伏的方法,使不同次凝固时黑体的光亮度起伏在±0.3%以内。得到的铂凝点与熔点黑体光亮度符合在0.2%以内。经检查发现,2~#铂锭经过三百多次的使用后,并未受到污染。光度基准总的不确定度为±0.33%。

The present monograph illustrates a concrete application of the method of optimisation in automatic optical design. Main topics presented are. an introduction; necessity of a perfect program of ray-tracing as the foundation of automatic optical design; choice of the corrected aberrations and the establishment of an assesment function based on lateral aberrations; parameters and arguments; essential ideas of the program; destination of multi-dimension variables; general block diagram and a practical example.

本文研究了0.618优化法在光学自动设计中的具体应用,主要讨论的问题有:概述,拥有一个完善的光路计算程序作为光学自动设计的基础;被矫正象差的选择和以垂轴象差为基准的评价函数,变量,进退变步0.618优化法的基本思想,多维变量的象差矫正表示法,程序框图和计算实例。

This paper describes a precision microhardness tester which is used as the provisional primary standard.The loading process and the duration of loading are controlled automatically.The magnification of the microscope used for indentation measurement is 640.There are six loading stages which are 50, 100, 200, 300, 500 and 1000 grams.The measuring accuracies are better than ±1.0% at 1000g, ±1.5% at 500g, ±2.0% at 200g and ±3.0% at 50g (below HV500) respectively.

本文介绍一台高精度显微硬度计,它已确定作为显微硬度临时基准使用。其加卸荷过程以及负荷保持时间全部系自动控制。测量压痕用的显微镜放大倍率为640倍。负荷有50、100、200、300、500和1000克六级。准确度分别优于±1.0%(1000克)、±1.5%(500克)、±2.0%(200克)和±3.0%(50克,HV500以下)。

 
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