助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   prop 的翻译结果: 查询用时:0.199秒
图标索引 在分类学科中查询
所有学科
矿业工程
思想政治教育
中国共产党
高等教育
体育
社会学及统计学
世界历史
更多类别查询

图标索引 历史查询
 

prop
相关语句
  支柱
     Development of DW28 - 35 Individual Hydraulic Prop New Packing Assembly
     DW28-35单体液压支柱新型密封装置的研制
短句来源
     A Sealing Quality Monitoring System for KJDT-2 Single Hydraulic Prop
     KJDT-2型单体液压支柱密封质量监测系统
短句来源
     The quality of cylinder will influence technical property of the single hydraulic prop directly.
     油缸是单体液压支柱的主要零件之一 ,油缸质量的优劣 ,直接影响单体液压支柱的使用性能。
短句来源
     Social science, the sonl and prop in advanced culture, plays a special role in the development of chinese advanced culture for it decides the development direction of the culture and carries the task of enriching and promoting the culture.
     社会科学是先进文化的重要组成部分 ,又在代表中国先进文化前进方向中承担着特殊的作用 ,社会科学是先进文化的灵魂和支柱 ,决定着先进文化的发展方向 ,承担着繁荣发展先进文化的任务 ,在新时期先进文化发展中必将起着无可替代的推动作用
短句来源
     Application of DWS12/25-250Double Extension Hydraulic Prop by External Infusing in Tongting Colliery
     DWSl2/25-250型外注式双伸缩支柱在童亭矿的应用
短句来源
更多       
  “prop”译为未确定词的双语例句
     the immunosuppression effect induced by NA was partly hindered by α and β receptor antagonists, phentolamine (Phen ,2 μl, 1.6×10 -2 mol/L) and propranolon(Prop,2 μl, 1.6×10 -3 mol/L),and the action of Prop was more evident.
     α及 β受体阻断剂酚妥拉明 (Phen ,2 μl,1.6× 10 -2 mol/L)和心得安 (Prop ,2 μl,1.6× 10 -2 mol/L)均可部分阻断NA的免疫抑制作用 ,且Prop的作用较强。
短句来源
     Based on the principle of defects causing the dielectric breakdown of the electric field,the equivalent thickness model was prop osed to evaluate and monitor quality and reliability of Si 3 N 4 capacitor rapidly.
     基于缺陷导致介质电场击穿的原理,提出了等效厚度模型评估和监测GaAsMMIC的Si3N4介质电容的质量和可靠性的新方法,可以用于工艺生产线实现对Si3N4介质电容的质量和可靠性进行快速评估和监测。
短句来源
     Influence of Normalizing Temperature on Structure and Mechanical Prop erties of ZG30CrMn2Si2NiMo Cast Steel
     正火温度对ZG30CrMn2Si2NiMo组织和力学性能的影响
短句来源
     IL-8 levels in the induced sputum of three groups were significantly different[COPD group(427.97±121.35)pg/mg pro,small airway dysfunction group(345.66±172.31)pg/mg pro,controls(241.80±124.31)pg/mg pro,P<0.01].
     IL8浓度分别为(427.97±121.35)pg/mg蛋白、(345.66±172.31)pg/mg蛋白、(241.80±124.31)pg/mg蛋白,差异有统计学意义(P<0.01);
短句来源
     Radiation-induced G 2 arrest was abrog ated by UCN-01in a concentration-dependent manner. UCN-01at the concentrations of 50,100,200and 400nmol /L decreased the prop ortion of cells in G 2 phase from 63.5%in the control g roup to 28.5%,25.0%,16.1%and 13.7%,respectively.
     UCN-01能够去除放射引起的CNE-1细胞G2期阻滞,50nmol/L、100nmol/L、200nmol/L和400nmol/LUCN-01组细胞的G2比例由对照组的63.5%分别降至28.5%、25.0%、16.1%和13.7%,UCN-01去除G2期阻滞的程度与药物浓度正相关。
短句来源
更多       
  相似匹配句对
     The Significance of Prop of the Stage
     戏剧道具的重要作用
短句来源
     the legal prop is the necessity ;
     公众参与环境保护必须有法律作后盾;
短句来源
查询“prop”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  prop
Biochemical Processing of Fats and Oils As a Means of Obtaining Lipid Products with Improved Biological and Physicochemical Prop
      
Effect of the Surface Structure of Poly(styrene-co-acrolein) Microspheres and Its Modification by Protein on Electrosurface Prop
      
Chemical design of quasi-one-dimensional organoiron nanostructures fixed on an inorganic matrix and study of their magnetic prop
      
A correlation between the inhibition of acid corrosion of iron by a mixture of compounds of a reaction series and the polar prop
      
The structure of cleaved mica particles and the influence of cleavage conditions on surface prop- erties of mica were studied by IR spectroscopy.
      
更多          


A mongst hundreds of analogues of chloramphenicol, which have so far beensynthesized and studied for their relationships between chemical constitutionand biological action, one concept is to curtail the hydroxymethyl group in the structure of chloramphenicol to form a simpler compound, 1-(p-nitrophenyl)-2-dichloroacetamido-ethanol (II), in which one asymmetric carbon being eli-minated. By so doing, however, the antibiotic activity is greatly reduced.We thought that the cause of loss of activity might be due...

A mongst hundreds of analogues of chloramphenicol, which have so far beensynthesized and studied for their relationships between chemical constitutionand biological action, one concept is to curtail the hydroxymethyl group in the structure of chloramphenicol to form a simpler compound, 1-(p-nitrophenyl)-2-dichloroacetamido-ethanol (II), in which one asymmetric carbon being eli-minated. By so doing, however, the antibiotic activity is greatly reduced.We thought that the cause of loss of activity might be due to the disappea-rance of chelating structure, which is regarded to be necessary for the exhibi-ting of antibiotic activity, between two hydroxyl groups as present in themolecule of chloramphenicol (I). In this investigation, therefore, the authorshave devised, on the one band, a compound, 1-(o-hydroxymethyl-p-nitrophenyl)-2-dichloroacetamido-ethanol (III), in which the hydroxymethyl group is retainedbut shifted from the propanediol side chain to benzene ring at the positionortho to the secondary alcoholic group so as to make the two hydroxyl groupsstill capable of chelating with one another. The second compound, 1-(o-hydroxy-p-nitrophenyl)-2-dichloroacetamido-ethanol (IV), is so designed that thehydroxymethyl group being changed to a hydroxyl group, which also shiftedto the same position as in compound III. Besides, 1-(o-methoxy-p-nitrophenyl)-2-dichloroacetamido-ethanol (VI), in which the hydroxyl group is masked bymethylation, has been prepared for the purpose of comparison. The results of antibacterial tests against both Gram-positive and Gram-negative bacteria showed that the activity of compound III, IV, VI was alsogreatly reduced as compared with that of chloramphenicol. This is in line withthe conclusion drawn by other investigators, who suggested that the prop-anediol moiety being vital to the exhibiting of antibiotic action of chloramphe-nicol. Compound III was prepared by a 11-step synthesis starting from o-amino-p-nitroethylbenzene (VII). The latter was converted to 2-ethyl-5-nitro-benzo-nitrile (VIII), m. p. 73.5°, yield 44%, by Sandmeyer reaction. The nitrile wasthen hydrolyzed to 2-ethyl-5-nitrobenzoic acid (IX), yield 90.5%; and subse-quently transferred to its methyl ester (X), b. p. 118--120°/1 mm, m. p. 36--37°,yield 90.5%, by usual way. The ethyl group of X was oxidized to acetyl groupby chromium trioxide to form 2-carbomethoxy-4-nitroacetophenone (XI), yield56.6%. α-Amino-2-carbomethoxy-4-nitroacetophenone hydrochloride (XIV) wasprepared by Delepine reaction, first by converting XI to α-bromo-2-Carbome-thoxy-4-nitroacetophenone (XII), followed by transferring the bromo-compoundto urotropine double salt (XIII), m. p. 147--149°, yield 46.5%, and finally byhydrolyzing the latter with hydrochloric acid. The amine (XIV), withoutisolating pure, was acetylated to α-acetamido-2-carbomethoxy-4-nitroacetophenone(XV), m. p. 168--l72°, yield 51.2%; which was then reduced by lithium aluminiumhydride to 1-(o-hydroxymethyl-p-nitrophenyl)-2-acetamido-ethanol (XVI), m. p.175--176°, yield 23.6%. The requiring product III, m. p. 136--137°, yield 66%,was obtained by substituting the acetyl group in compound XVII with dichlo-roacetyl group, first by hydrolyzing to free amine (XVII), m. p. 172--173°(dec),yield 72%, and treating the latter with methyl dichloroacetate. Compound IV, m. p. 143--144°, and compound VI, m. p. 94.5--96°, were bothprepared from the corresponding carbonyl compounds, α-dichloroacetamido-2-hydroxy (or methoxy)-4-nitroacetophenone (V, or XVIII) by Meerwein-Ponn-dorf reduction in, 13% and 47% yield respectively.

1.从隣氨基-对硝基乙苯开始,经过十一个步骤合成1-(隣羟甲基-对硝基苯)-2-二氯乙酰胺基乙醇。此化合物没有氯霉素的原有抗菌作用,因此说明氯霉素结构上的羟甲基移位后虽然仍可能有氢键钳环结构也不能维持原有抗生作用。 2.α-二氯乙酰胺基-隣羟(或甲氧基)-对硝基苯乙酮经异丙醇铝还原获得1-(隣羟(或甲氧基)-对硝基苯-2-二氯乙酰胺基乙醇,此二化合物的抗菌作用也小於氯霉素。

Based upon our first paper and continuing the "Standard candle" classification by use of the component linear distance D, we attain to the following statistical correlation of some type of Quasars with largest angular diameter Q_(max): the correla- tion between visual magnitude and redshift; the correlation between its absolute magnitude, radio-luminosity of single frequency, integral radio Iuminosity, colour in- dex difference Q and D. According to these statistical laws, a series of inferrences on the evolution...

Based upon our first paper and continuing the "Standard candle" classification by use of the component linear distance D, we attain to the following statistical correlation of some type of Quasars with largest angular diameter Q_(max): the correla- tion between visual magnitude and redshift; the correlation between its absolute magnitude, radio-luminosity of single frequency, integral radio Iuminosity, colour in- dex difference Q and D. According to these statistical laws, a series of inferrences on the evolution prop- erties have been derived as follows: 1. The optical luminosity decreases with the increase of D. dM_v/dD=10.~m6/MPC. 2.The radio luminosity decreases with the increase of D. dM_(4,8-5000)=9.~m17/MPC. 3.The colour index difference Q decreases with the increase of D. dQ/dD=-1.~m55/MPC. 4.In the process of evolution, radio spectral type, defined by the spectral in- dex, does not change in general. 5. Optical radiation is mainly lion-thermal, but thermal radiation increases gra- dually with evolution. 6.The time scale estimated from optical luminosity, radio luminosity and col- our index difference Q, all have nearly the same value, 1.6 10~7 yr. 7. There is no discrepancy between the above features and the viewpoint that QSO_s evolve to galaxies. 8.There is no apparent statistical dependence between D and the distance, i. e. no evidence to, imply that all QSO_s were formed at the same epoch. This is con- trary to the views of the bigbang cosmology.

本文在第I部分的基础上,继续用类星体射电子源线距D进行“标准烛光”分类,经过统计分析,得到了子源角径最大的一类类星体的一些统计规律:它的视星等与红移之间,它的绝对星等、单频射电光度、积分射电光度和色指数差Q与D之间有很好的相关性等.由此得到下列有关有子源类星体演化性质的推论:1.随着子源间距D的增大,光学光度下降:dM_v/d_D=10.~m6/MPC.2.随着子源间线距D的增大,射电光度下降.dM_(408-5000)/dD=9.~m04/MPC.3.随着子源间线距D的增大,色指数差Q下降.dQ/dD=-1.~m55/MPC.4.在演化过程中,射电谱型,即谱指数基本保持不变.5.光学辐射主要是非热致的.但随着演化,热致辐射的成分渐渐增多.6.根据光学光度、射电光度以及色指数差Q三种物理量所估计的类星体的演化时标基本一致,大约是1.6×10~7年.7.这些性质和类星体最后演化为星系的总观点不矛盾.8.子源线距D与距离间没有明显的统计相关,即没有迹象表明类星体是在同一个时代产生的,这是大爆炸宇宙学所不能解释的.

The double composite gear in the speed-changing and feed gearboxes of machine tool has been designed by trial-and-error method, and there was not a criterion to decide whether the quality of design was the best. In consequence, it was difficult to get an ideal plan quickly. In this paper a concept about the equivalent center distance of gear trasmission was prop- osed. By means of this concept a number of design criterions were analysed and compared, and it was proposed to use the sum of the equivalent...

The double composite gear in the speed-changing and feed gearboxes of machine tool has been designed by trial-and-error method, and there was not a criterion to decide whether the quality of design was the best. In consequence, it was difficult to get an ideal plan quickly. In this paper a concept about the equivalent center distance of gear trasmission was prop- osed. By means of this concept a number of design criterions were analysed and compared, and it was proposed to use the sum of the equivalent areas of gears as the object function to be optimized. A mathematical model was established for optimum design of double composite gear. By the calculation with a computer some graphs were given. By means of these graphs it was convenient to get an optimum version of the double composite gear according to different requirements (i. e, restrained condition).

机床变速箱和进给箱中所用的双公用齿轮机构一直采用试算法进行设计,并且没有一个合理判断设计优劣的定量指标,因此较难迅速地获得比较理想的方案。本文提出齿轮传动的当量中心距的概念,并用这个概念分析比较了多种设计指标。在这基础上提出以各齿轮当量面积总和最小作为最优化的目标函数,建立了双公用齿轮优化设计的数学模型。通过电算绘成线图。应用这些线图,可以方便地根据不同要求(即约束条件)求得双公用齿轮传动的最优方案。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关prop的内容
在知识搜索中查有关prop的内容
在数字搜索中查有关prop的内容
在概念知识元中查有关prop的内容
在学术趋势中查有关prop的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社