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     A STUDY OF NUMERICAL METHODS FOR LIMIT AND SHAKEDOWN ANALYSES OF STRUCTURES AND THEIR ENGINEERING APPLICATIONS
     结构极限与安定分析的数值方法研究及其工程应用
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     Determination of Metallographic Cooling Rate of Meteorites and Study of Thermal History of Their Parent Bodies
     陨石金相冷却速率测定及母体热历史研究
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     A Study of Metastable Alloys Formation in Solid Thin Films
     固态薄膜中亚稳合金相的形成及理论研究
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     Study of Some Key Problems of the Finite-Difference Time-Domain Method and its Applications
     时域有限差分法关键问题研究及其应用
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     Study of Absorbing Boundary Conkition and Its Applications
     吸收边界条件的研究及其应用
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     Study of Simplified STAP and Its Application to Airborne Radar
     机载雷达简易STAP方法及其应用
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     The Epidemiologic Study of Impaired Glucose Metabolism in the Elderly During 1996~2000
     1996—2000年老年人群糖代谢异常的流行病学调查分析
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     Functional Study of RbAp46, A Novel Tumor Suppressor Gene
     RbAp46——一种新的肿瘤抑制基因
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     On Study of the Function of Art
     艺术功能论
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     The Development and Application of the Area Soil Information System--A Case Study of Chongqing
     区域土壤信息系统的建立与应用——以重庆市为例
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     研究了ABS和PVC对PC/ABS共混体系力学性能的影响。
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     The study of C.
     目前各国学者不但研究了各海区C.
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     The Study on DuGang
     杜纲研究
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In our paper [KR] we began a systematic study of representations of the universal central extension[InlineEquation not available: see fulltext.] of the Lie algebra of differential operators on the circle.
      
This paper is devoted to a systematic study of quantum completely integrable systems (i.e., complete systems of commuting differential operators) from the point of view of algebraic geometry.
      
The main idea for our approach relies on a study of the boundary theory we established for the general CAT(-1) spaces.
      
The aim of the paper is the study of the orbits of the action of PGL4 on the space ?3 of the cubic surfaces of ?3, i.e., the classification of cubic surfaces up to projective motions.
      
We give criteria for a divisor to be Cartier, globally generated and ample, and apply them to a study of the local structure and the intersection theory of aG-variety.
      
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The assignment of the fundamental frequencies of C4H2 given by Timm and Mecke is discussed and a new assignment in accord with the selection rules is suggested. Nine force constants for the molecule are calculated according to Timm and Mecke's assignment, while the new assignment gives no reasonable constants for the deformation vibrations. Further study of the Raman spectrum and the infrared absorption is necessary for a final classification of the deformation frequencies.

按Timm Mecke之C_4H_2基本振动率,吾人求得一含有九个常动之势能式中各常数之值。

The phenomellon of limiting heating is of vital importance and interest in the study of gas' flow through a tube with heat additioll fi.om both theoretical and practical points of view. In particular, it has applications to the design of thel.mal ducts of pl'opulsive devices for high speed aircraft. TI}ils poper col,sists of a prelimillary "study Of limiLing'heating for the;(jfole case of a perfect gas in steady flow through a tube of unifornl cross section. It starts from tile fulldamelltal laws...

The phenomellon of limiting heating is of vital importance and interest in the study of gas' flow through a tube with heat additioll fi.om both theoretical and practical points of view. In particular, it has applications to the design of thel.mal ducts of pl'opulsive devices for high speed aircraft. TI}ils poper col,sists of a prelimillary "study Of limiLing'heating for the;(jfole case of a perfect gas in steady flow through a tube of unifornl cross section. It starts from tile fulldamelltal laws governing the gas now, fi-om which analytical condiLion for limiting heatillg is then derived, and the beavior of gas at exit as resulted. from limiting heating is discussed in some details. Among the conclusions thus obtained, it is interesting to notice that, as the result of limiting hear,ing the gas is leaving tile exiL with less temperature or velocit,y within certain ranges of initial Mach Number; and that sonic s'tate is 'the limiting state that could be reached by ally flow, subsonic or supersonic, t}lrough 11eat addition.

管内稳流气体之加热不能超过一定之限度,逾限即发生所谓限塞现象.在气体热动力学之理论与实际上,极限加热为一重要而饶有兴趣之问题.在现代高速度航空推进机热管部份之设计大多应用。本文试就极限加热作初步之分析:篇首先述气体流动之基本定律,由此以诱导加热限度公式,再由此讨论气体经过极限加热後之状态,并就气体加热前之流速分次声速(subsonic),声速(sonic)与超声速(supersonic)三种情况加以比较.在本文所得结论中,有值得吾人注意者即流动气体在某一速度范围之内其温度与速度反因加热而减低.此外声速状态(sonic state)为任何流动,(flow),不论是超声速底或次声速底,经加热後所能达到之极限状态,亦由本文根据极限加热之理论加以证明.在 paul Ghambre与林家翘两先生之“On the steady Flow of a Gas Through aTube with Heat Exchange orchemical Reaction”文中会有仝样之结论,共立论系从气体瞬间状态之分析入手,不涉加热限度.本文则从气体起始与终结状态间之关系着手,而以极限加热为讨论中心.如与二氏原文参看可以相中互印证补...

管内稳流气体之加热不能超过一定之限度,逾限即发生所谓限塞现象.在气体热动力学之理论与实际上,极限加热为一重要而饶有兴趣之问题.在现代高速度航空推进机热管部份之设计大多应用。本文试就极限加热作初步之分析:篇首先述气体流动之基本定律,由此以诱导加热限度公式,再由此讨论气体经过极限加热後之状态,并就气体加热前之流速分次声速(subsonic),声速(sonic)与超声速(supersonic)三种情况加以比较.在本文所得结论中,有值得吾人注意者即流动气体在某一速度范围之内其温度与速度反因加热而减低.此外声速状态(sonic state)为任何流动,(flow),不论是超声速底或次声速底,经加热後所能达到之极限状态,亦由本文根据极限加热之理论加以证明.在 paul Ghambre与林家翘两先生之“On the steady Flow of a Gas Through aTube with Heat Exchange orchemical Reaction”文中会有仝样之结论,共立论系从气体瞬间状态之分析入手,不涉加热限度.本文则从气体起始与终结状态间之关系着手,而以极限加热为讨论中心.如与二氏原文参看可以相中互印证补充。

This communication reports the results of a study of the gravimetric deter- mination of lead as normal phosphate, known as Vortmann and Bader method, which has been recently examined by Hubicki and Rys. According to our findings, tartaric acid should be added only when antimony is present. With the addition of tarearic acid unusual large excess of precipitant as suggested by Vortinann and Bader is required for complete precipitation. The suitable pH range for the precipitation of tertiary lead phosphate...

This communication reports the results of a study of the gravimetric deter- mination of lead as normal phosphate, known as Vortmann and Bader method, which has been recently examined by Hubicki and Rys. According to our findings, tartaric acid should be added only when antimony is present. With the addition of tarearic acid unusual large excess of precipitant as suggested by Vortinann and Bader is required for complete precipitation. The suitable pH range for the precipitation of tertiary lead phosphate is 6.5 to 10. Below pH 6.5, the precipitation will be incomplete, owing apparently to the formation of acid phosphate(s). Beyond pH 10, no experiment has been made, because no advantage is gained by working in such alkaline media. The concentration of the precipitant in sdlution after reaction should be within 0.00085-0.0033 molar in order to obtain good results. The precipitates may be ignited at any temperature from 650℃ up to at least 900℃. The practice of drying the pre- cipitates at 130℃ to constant weight suggested by Hubicki and Rys should be discarded, since the precipitates still contain noticeable amounts of water after drying to constant weight at that temperature. It is preferred to use the method of precipitation from homogeneous solution. With this technique in practice dense, crystalline and easily filterable precipitates are obtained; and small quantity of lead, as low as 5 mg, may be determined satisfactorily. The effect of presence of some alkali and ammonium salts has also-been studied.

本文報告用磷酸根測定鉛重量法的各種適宜條件。溶液的pH值應在6.5至10之間。過剩沉澱劑在溶液中的濃度應為0.00085——0.0033M。沉澱應在650℃-900℃間灼燒之;如在130℃乾燥,則沉澱內的水份不能完全驅盡。均勻沉澱可改善沉澱的性質,並可测定少至5毫克的鉛。如溶液中無銻,則不必加酒石酸。

 
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