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sharp     
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  急剧
     With the development of Web technology and the sharp increase of the demand of modem management, the MIS (Management information system) based on C/S (Client/Server) can't accommodate the high speed and wide application of data operation and data processing.
     近来,随着网络技术不断发展和现代化管理需求的急剧增长,基于C/S(Client/Server)模式的MIS(Management information system)已不能适应今天更高速度、更广地域范围的数据运算和处理。
短句来源
     With the development of Web technology and the sharp increase of the demand of modern management, the MIS (Management Information System) based on C/S (Client/Server) can't accommodate the high speed and wide application of data operation and data processing.
     近来,随着网络技术不断发展和现代化管理需求的急剧增长,基于C/S(Client/Server)模式的MTS(Management Information System)已不能适应今天更高速度、更广地域范围的数据运算和处理。
短句来源
     At a fixed PETG content of 85wt%,a sharp brittle\|tough transition occurs when the TPEg content in the dispersed phase increases from 20 to 30 wt%,namely that the TPEg content in the blend increases from 3 to 4 5 wt%.
     在固定PETG基体含量为 85wt %的前提下 ,当TPEg在 15 %分散相中的含量由 2 0 %增加到30 %时 ,即TPEg在共混体系中的含量由 3 %增加到 4 5 %时 ,共混体系出现了由脆性到韧性的转变 ,冲击强度急剧升高
短句来源
     After a sharp decrease in the mRNA expression of several cytokines as IL-12p40, IL-18, GM-CSF, and MCP-1 at 3 DPI, these cytokines rose and peaked at 14 or 21 DPI, went down to the normal thereafter. IL-8 mRNA expression was less at 3 and 7 DPI, but more at 14 DPI.
     IL-12p40、IL-18、GM-CSF和MCP-1mRNA表达在接种后3天内急剧减少,之后增加,14天或21天时到达峰值,之后下降至恢复正常:IL-8 mRNA在接种后7天内明显下降,14天时才急剧上升:TNF-αmRNA没有明显变化;
短句来源
     Being essential assurance of continuous development and pursuing object of postgraduate education, the quality of postgraduate education is now almost assailed everywhere, for the conflict of quantity and quality which are two basic elements of the active development of postgraduate education is getting more and more obvious with its sharp enlargement.
     研究生培养质量是研究生教育自身可持续发展的根本保证,也是我国研究生教育追求的实质性目标。 数量的增长和质量的提高是研究生教育积极发展的两个基本要素,现在,随着研究生教育规模的急剧扩大,数量与质量的矛盾日渐突出,研究生培养质量遭受的各种质疑说明,加强研究生培养质量保障的研究迫在眉睫。
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     Results The incidence of injury was 61.23%,the five leading categories of injuries were falling(23.97%),colliding(23.59%),knife-cutting or sharp object wound(21.51%),animal bites(16.00%),and burn or scald(15.12%).
     结果伤害年发生率为61.23%,前5位伤害依次为跌伤(23.97%)、碰伤(23.59%)、刀或器伤(21.51%)、动物咬伤(16.00%)、烧烫伤(15.12%);
短句来源
     Eu~(2+) occupiesthe lattice site of A~+ in AMF_4:Eu~(2+) and its emission is a sharp peak which risesfrom f→f transition of Eu~(2+).
     Eu~(2+)占据 AMF_4中 A~+格位。 AMF_4:Eu~(2+)和 AI_nF_7:Eu~(2+)中,Eu~(2+)发射是峰,来源于 f→f 跃迁。
短句来源
     The sharp instrument injuries and blames from patients were more serious in the second grade hospitals than in the primary grade hospital (x2=24.381, P<0.05;x2 = 21.174, P<0.05), the protective status was worse in the primary grade hospitals than in the second grade hospitals.
     在调查的职业伤害中二级医院器损伤情况、受病人责难的情况比一级医院严重(x2= 24.381,P<0.05;x2=21.174,P<0.05);
短句来源
     In addition, there is a sharp line absorption peak at 274nm for Eu~(3+) activated Gd-host, which results from the transition of ~8S→~6I in Gd~(3+), and it shows that there exists an energy transfer from Gd~(3+) to Eu~(3+).
     另外Gd基质试样在274nm处有一线吸收,是由Gd~(3+)的~8S→~6I跃迁产生的,表明Gd~(3+)可以把吸收的274nm波长的能量传递给Eu~(3+)。
短句来源
     The application of  ̄(16)O(α,α) ̄(16)O sharp resonance in calibration and oxygen depth profile
     ~(16)O(α,α)~(16)O共振在加速器能量快速校刻及氧元素深度剖析中的应用
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  锐利的
     Sharp absorption edge appeared in the transmittance spectra of the Mg-xZn- 1-x O films, the fundamental band gap of the Mg-xZn- 1-x O films were estimated, which increases almost linearly from 3.32 eV at x 0 to 3.96 eV at x 0.30.
     在MgxZn1-xO薄膜的光透射谱中出现锐利的吸收边,由透射谱估算出MgxZn1-xO薄膜的带隙宽度由3.32eV(x=0)线性地增加到3.96eV(x=0.30).
短句来源
     Re-sults: Postoperatively an anterior capsular opening of 6.5~7.0 mm in diameter with sharp edge could be seen in 48 eyes and the fixation of both loops in the capsular bag was found in 44 eyes (84.6%)in capsulorhexis group and 21 eyes(52.5%)in “canopener”capsulotomy group.
     结果:术中可见连续环形撕囊组中有48只眼获得直径约6.5~7.0mm边缘锐利的圆形撕裂孔,术后44只眼(84.6%)人工晶体的双襻均在囊袋内,而“开罐式”破囊组术后仅21只眼(52.5%)双襻在囊袋内。
短句来源
     When cultured at 37℃ , there was a sharp peak of transformation efficiency at OD600 0.6-0.7. Transformation efficiency increased with increased field strength at 18℃ of cultivation and decreased significantly when field strength reached 20. 5 kV/cm at 37℃ of cultivation.
     而在37℃培养的细菌,转化效率仅在OD600 0.6~0.7时出现一个锐利的峰值,此OD600值前后转化效率显著下降。 在不影响细胞生长的情况下,18℃培养细菌的转化效率随电场强度增加而升高;
短句来源
     Cutting Balloon is a new balloon angioplasty device with 3 or 4 microtome sharp metal blades mounted longitudinally on the surface of the balloon.
     切割球囊(CB)是一种新型的球囊扩张装置,其球囊表面沿球囊纵轴附有3~4片锐利的微型金属刀片,呈辐射状排列。
短句来源
     It is the most sharp weapon of theory for ethics to rethink of and animadvert on the view of development.
     伦理学是对发展观展开反思和批判的最锐利的理论武器。
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  截然的
     But for Frost, there is a sharp contrast, an impassable gulf, between human beings and nature.
     而在弗洛斯特看来,自然与人类之间有着一条不可逾越的鸿沟,存在着截然的对立;
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  sharp
The sampling results are sharp in the sense that if any condition is omitted, there exist nonzero $f\in L^p[-R,R]^d$ and $C^{m-2-k}[-R,R]^d$ satisfying the rest.
      
Sharp estimates for commutators of singular integrals via iterations of the Hardy-Littlewood maximal function
      
Sharp constants for function-space inequalities over a manifold encode information about the geometric structure of the manifold.
      
Some sharp restriction theorems for homogeneous manifolds
      
Sharp inequalities between weight bounds (from the doubling, Ap, and reverse H?lder conditions) and the BMO norm are obtained when the former are near their optimal values.
      
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A method based upon simple diffraction theory is described for the calculation of modified paraboloid reflectors to produce from a point source a shaped beam of arbitrary shape in one plane and uniformly narrow in the perpendicular planes. A specific application of the shaped beam antennas is in connection with radar antennas designed for height finding. In this case the antenna must have a sharp elevation beam for obtaining precise elevation information and a rapid elevation scan. The beam must be relatively...

A method based upon simple diffraction theory is described for the calculation of modified paraboloid reflectors to produce from a point source a shaped beam of arbitrary shape in one plane and uniformly narrow in the perpendicular planes. A specific application of the shaped beam antennas is in connection with radar antennas designed for height finding. In this case the antenna must have a sharp elevation beam for obtaining precise elevation information and a rapid elevation scan. The beam must be relatively broad in azimuth in order that the target will be held in the beam long enough to obtain height information. If a fixed minimum of illumination is to be achieved at a given linear distance on both sides of the center line of the azimuth beam, the amplitude pattern must have the so-called "double cosecant" or "beavertail" shape.

本论文讨论如何利用简单衍射理论,计算改良抛物面反射器天线幅射之图型。此反射器可将一无方向性辐射源之能量聚集于任何形状之波束中。此原理可以应用在地面上或船面上寻求飞机高度雷达天线之设计。在此类雷达中,天线之方位图型必须为“双馀割平方”式;其特性为自波束对称轴线起,至其两端,辐射一次路程之功率,与方位角之馀割平方成正比。得此图型之最简易方法为置一狭窄之铅垂金属条于一截形抛物面反射器之中心,金属条之宽度,可改变波束之方向性;其支距,即金属条与反射器之距离,可影响两反射波之位相。故改变金属条之宽度及其支距,可得欲得之图型。 利用衍射及干涉理论,计算金属条及截形抛物面所生之总图型为:在方位面内,幅射强度J_H与水平角θ之关系为: J_H =AA[sin~2(15πsinθ)/(15πsinθ)~2-2(1-cosπ/4)sin(2πsinθ)/2πsinθ(sin(2πsinθ)/2πsinθ-sin(15πsinθ)/15πsinθ)]A为辐射波振幅,A为A之复共轭数。计算之结果与实验之结果,颇为一致。

In view of the necessity of a rapid and accurate process for the deter-mination of fluorine applicable in the analysis of sodium fluoride and otherfluorine compounds,the author has established a new volumetric processconsisting in the titration in aqueous-alcoholic medium with ferric nitrate asstandard solution and sodium salicylate as indicator.All of the methods,published by Guyot,Greeff,Fairchild andVisintin proposed for the determination of fluorine using ferric solutionas standard,are based on the reaction:6NaF+FeCl_3→Na_3FeF_6+3NaCl....

In view of the necessity of a rapid and accurate process for the deter-mination of fluorine applicable in the analysis of sodium fluoride and otherfluorine compounds,the author has established a new volumetric processconsisting in the titration in aqueous-alcoholic medium with ferric nitrate asstandard solution and sodium salicylate as indicator.All of the methods,published by Guyot,Greeff,Fairchild andVisintin proposed for the determination of fluorine using ferric solutionas standard,are based on the reaction:6NaF+FeCl_3→Na_3FeF_6+3NaCl. But the sodium ferric fluoride thus formed is fairly soluble in water and makesthe end-point unclear,therefore the titration can not be performed accurately.This seems to be due to the fact that the following two reactions advancesimultaneously,and accordingly the formation of sodium ferric fluoride is in-complete in aque(?)us medium:3NaF+Fe(NO_3)_3→FeF_3+3N_aNO_33NaF+FeF_3→Na_3FeF_6Nevertheless,these reactions,according to the author's experiments;proceedalmost quantitatively in meda.containing at least 50% by volume of alcohol.This paper reports the xperimental results obtained in the fundamentalstudies on the various factors influencing the accuracy of the volumetry,namely,the sensitivity and the necessary amount of sodium salicylate used asindicator,the pH value,the alcoholic concentration of the titration medium,the concentration of the fluoride taken for the determination and the timewhen alcohol should be added in the course of titration.Furthermore,a rapidvolumetric process with high accuracy is proposed together with its applicationsin ordinary analyses of sodium fluoride and other fluorine compounds.The proposed method is characteristic in using sodium salicylate asindicator,which shows sharp violet color with minute amount of ferric ion inmedium of pH 3 controlled with buffer solution,then titrating with standardferric nitrate,and adding proper amount of alcohol(the alcoholic concentra-tion at the end-point should be above 50%)during the titration,when themedium becomes orange yellow in color.The method may be summarized as follows:Take 5 ml of neutral sodiumfluoride solution of about 0.3 N in a small Erlenmeyer flask,add 2.5 mlof Walpole's buffer solution of pH 3(formed by dissolving 34.0 g ofcrystalline sodium acetate and 20 ml of 38% HCl in water,and making upto 250 ml)and 1 ml of 0.1 M sodium salicylate dissolved in 50% alcohol.After sufficient stirring,titrate with standard 0.3 N(0.05 M)ferric nitratesolution,using micro-burette until the medium becomes orange yellow,thisstep being reached after addition of about 4 ml of titrant.Then decolorizethe solution by adding 12.5 ml of absolute alcohol(or 13 ml of 95% alcohol),previously purified by redistillation with lime;stirring is necessary during theaddition.Further continue the titration until the light pink color formeddoes not fade after stirring for 30 seconds when observed over a white surface. In the analyses of sodium fluoride and other fluorine compounds con-taining interfering substances,such as divalent and polyvalent metallic ions,phosphate,silicate,borate,carbonate,sulfide ions and reductants acting on ferricion,it is necessary to separate fluorine from these interfering substances bythe distillation with sulfuric acid according to the method of Willard andWinter(20).Then the distillate is neutralized with dilute sodium hydroxideand adjusted to the proper pH with hydrochloric acid using p-nitrophenol asindicator.The solution is ready for titration as described.But in the caseof absence of these interfering substances except carbonate,for example,inthe determination of the concentration of sodium fluorde solution obtained bythe extraction of the crude product,produced industrially by fusing fluorsparwith sodium carbonate and silica,the above separation of fluorine by dis-tillation is dispensable.The anaIytical results obtained by the proposed method are in goodagreement with those obtained by the lead chlorofluoride process(8),whichis recognized as official method for the determination of fluorine in agriculturalproducts.

本文介绍一容量分析氟的新方法和在工业制品上的应用,并分析了一种工业制备的氟化钠液,所得的结果和氟氯化铅法所得的极为一致。对于影响该分析法准确度的各种因素:指示剂的灵敏度和滴定时适宜的用量、溶液的 pH 值、应加的乙醇量、操作中加乙醇的次序、以及氟离子的适宜浓度,均加以研究并找出适宜的情况。本法用硝酸铁为标准液,水杨酸钠作指示剂,在 pH=3左右作滴定;当溶液呈橙黄色时,加入适量的乙醇,使其浓度在终点时仍不低于50%。如有干扰物质如二价及多价金属离子、磷酸根、矽酸根、硼酸根、碳酸根、硫化物和还原物质可能与三价铁起作用者,均应分离之。

In boiling acetone solution benzoylisothiocyanate reacts readily with alcoholsto form N-benzoylthiourethans,which in most cases are well crystallized solidswith sharp melting points.Since the reagent is easily prepared,the procedureaffords a convenient method for the identification of alcohols.

苯甲醯异硫氰与醇类在沸腾的丙酮溶液中能作用产生苯甲醯氨基硫代甲酸酯,它们通常是具有固定熔点的、良好地结晶的物质。由于这种试剂容易制备,它对于醇类的鉴定提供了一个比较便利合适的方法。

 
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