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
   ir 的翻译结果: 查询用时:0.017秒
图标索引 在分类学科中查询
所有学科
化学
有机化工
无线电电子学
武器工业与军事技术
无机化工
一般化学工业
燃料化工
地质学
石油天然气工业
更多类别查询

图标索引 历史查询
 

ir     
相关语句
  红外
     A Study on the Detection of Small Targets in IR Image Sequences with Heavy Cloud Clutter
     强起伏条件下红外小目标检测算法研究
短句来源
     Study on the Image Pre-processing Method and System Software for Staring IR Imaging Information Processing System
     凝视红外成像信息处理系统图像预处理方法与系统软件研究
短句来源
     Study on Vision Mechanism and It's Application in IR Imaging Guidance System
     视觉机制研究及其在红外成像制导中的应用
短句来源
     Research on Modeling of IR FPA Imaging System & TOD Performance Characterization Method
     红外焦平面成像系统建模及TOD性能表征方法研究
短句来源
     THE KINETIC TREATMENT OF ISOTOPE ENRICHMENT PROCESS UNDER FOCUSED IR LASER PULSE
     红外聚焦脉冲激光场中同位素浓缩过程的动力学处理
短句来源
更多       
  红外光谱
     INVESTIGATION OF THE CONSTITUTION AND STRUCTURE OF JIAWANG VITRINITES BY MILD HYDROGENATION——Ⅲ. STUDY ON THE COMPOSITION OF THE MILD HYDROGENATION PRODUCTS FROM JIAWANG VITRINITES BY UV AND IR SPECTROGRAPHY
     低度氢化研究贾汪镜煤质的组成结构 Ⅲ.氢化产品的紫外光谱和红外光谱
短句来源
     IR STUDY OF THE FRAMEWORK VIBRATIONS OF CATIONIC ZEOLITES
     阳离子型沸石骨架振动的红外光谱研究
短句来源
     IR SPECTRA OF CO ADSORBED ON Ru/Al_2O_3 AND Pt/Al2O3 AND THE INTERACTION BETWEEN METAL AND CARRIER
     CO在Pt/Al_2O_3和Ru/Al_2O_3上的红外光谱及金属和载体的相互作用
短句来源
     An IR Study of Curing Kinetic of Terpolymer Vinylchloride-Vin ylacetate-Vinylalcohol and 4,4′-Diphenylmethane Diisocyanate
     红外光谱法研究氯乙烯—醋酸乙烯酯—乙稀醇共聚物和4.4′二苯基甲烷二异氰酸酯固化动力学
短句来源
     An IR Spectral Study on the Chemical Stability of the Polysulfonamide Reverse Osmosis Membrane
     聚砜酰胺反渗透膜化学稳定性的红外光谱研究
短句来源
更多       
  红外光
     INVESTIGATION OF THE CONSTITUTION AND STRUCTURE OF JIAWANG VITRINITES BY MILD HYDROGENATION——Ⅲ. STUDY ON THE COMPOSITION OF THE MILD HYDROGENATION PRODUCTS FROM JIAWANG VITRINITES BY UV AND IR SPECTROGRAPHY
     低度氢化研究贾汪镜煤质的组成结构 Ⅲ.氢化产品的紫外光谱和红外光
短句来源
     IR STUDY OF THE FRAMEWORK VIBRATIONS OF CATIONIC ZEOLITES
     阳离子型沸石骨架振动的红外光谱研究
短句来源
     An IR Study of Curing Kinetic of Terpolymer Vinylchloride-Vin ylacetate-Vinylalcohol and 4,4′-Diphenylmethane Diisocyanate
     红外光谱法研究氯乙烯—醋酸乙烯酯—乙稀醇共聚物和4.4′二苯基甲烷二异氰酸酯固化动力学
短句来源
     An IR Spectral Study on the Chemical Stability of the Polysulfonamide Reverse Osmosis Membrane
     聚砜酰胺反渗透膜化学稳定性的红外光谱研究
短句来源
     IR STUDY OF THE STRUCTURE OF THE CATALYST (MgCl_2/TiCl_4·THF/AlEt_3) FOR THE GAS-PHASE POLYMERIZATION TO PRODUCE LINEAR LOW DENSITY POLYETHYLENE
     气相法LLDPE催化剂(MgCl_2/TiCl_4·THF/AlEt_3)结构的红外光谱研究
短句来源
更多       
  红外的
     The results of TG and IR analysis show that the formular of the complex is Zn(C_8H_8O_4)·2H_2O, and that the starting decomposion temperature of the complex is approximately 377 ℃ and the complete decomposion temperature 493 ℃ with the final decomposion product ZnO.
     热重及红外的分析结果表明,锌络合物的分子式为Zn(C8H8O4)·2H2O,且由热重测得其无水络合物Zn(C8H8O4)的起始分解温度为377℃,在493℃时的最终分解产物为ZnO。
短句来源
     The reflectance of the coating to visible light and to near IR are 86% and 81%, respectively.
     制备的涂层对可见光和近红外的反射比分别为86%和81%。
短句来源
     Experimental Study on IR Attenuation with Special Foam Cloud
     特种泡沫云对常用频段红外的干扰实验研究
短句来源
     The result of the present experiment clarify the relation of radiation in the near IR spectrum of air with NO and N2 concentration and provide new experimental evidence for the NO hypothsis.
     因而,测量为论证空气在近红外的主要辐射源为NO而不是N_2提供了新的实验依据,并使以往激波管测量中的矛盾统一起来了。
短句来源
     All of the new compounds were characterized by not only NMR, MS and IR spectra, but also the single-crystal X-ray analysis in the case of the product 3e.
     所有新化合物结构不仅经过了核磁、质谱和红外的测定,还得到了化合物3e单晶的X-射线衍射的确认。
短句来源
更多       

 

查询“ir”译词为其他词的双语例句

     

    查询“ir”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。
      ir
    The synthesized compounds have been characterized on the basis of elemental analyses, infrared spectroscopy (IR), and nuclear magnetic resonance (NMR).
          
    Their structures were determined by IR spectra, 1H nuclear magnetic resonance (NMR), 13C NMR, and elemental analysis.
          
    The polymers were characterized by IR spectra, thermal-weight analysis, scanning electron microscope and laser particle size analysis.
          
    The structure of the B3 monomer was confirmed by MS, 1H NMR/IR.
          
    The structure of the titled compound is determined by infrared spectrum(IR), proton nuclear magnetic resonance (HNMR), and mass spectrum (MS) and elemental analysis (EA).
          
    更多          


    The average nuclear level spacings of In, Ir and Au are estimated from the beta-ray activities induced by the primary photo-neutrons emitted from a Ra+Be source. A Geiger-Muller counter made of aluminum is used for measuring the induced activities. The saturated induced activities for the three elements are found to be 0.665±0.23 0.982±.03l, 0.453±0.21 (no./sec.) respectively. The estimation for the average nuclear level spacings is made in accordance with Breit-Wigner's one level formula, the resnlts...

    The average nuclear level spacings of In, Ir and Au are estimated from the beta-ray activities induced by the primary photo-neutrons emitted from a Ra+Be source. A Geiger-Muller counter made of aluminum is used for measuring the induced activities. The saturated induced activities for the three elements are found to be 0.665±0.23 0.982±.03l, 0.453±0.21 (no./sec.) respectively. The estimation for the average nuclear level spacings is made in accordance with Breit-Wigner's one level formula, the resnlts being 5.6, 15 and 6 volts for In, Ir, Au respectively. The spacing of Ir is probably somewhat over estimated since the values of the energy and absorption coefficient of the resonance neutron group, used in the estimation, are not very accurate.

    作者用镭加钡之光感中子以射击铟铱金三元素,而以一铝质盖密计(GeigerMuller counter)测其感应放射能。得各元素感应放射能之饱值,铟为0.665士.023.铱为0.982±.031,金为0.453±.024.依白威二氏(Breit-Wigner)之单能准式,吾人可自感应放射能之值道出原子核能准之平均间隔。所得结果,铟铱金各为5.6,15,6伏特。因计算时所用共振中子之能及吸收系数不太准确,估计所得铱之间隔大概过高。

    Theories of the "dead-stop" end-point method of titration of Foulk andBawden have been studied recently by Delahay, Kies, Duyckaerts,Gauguin and Charlot, and Bradbury, but no conclusive remarks have beenobtained by these authors as to the choice of optimum experimental conditionssuch as the applied voltage, the initial concentration of the solution to betitrated, the temperature, the electrode area, the stirring rate, the resistancein the circuit and the sensitivity of the galvanometer. This situation hashandicapped...

    Theories of the "dead-stop" end-point method of titration of Foulk andBawden have been studied recently by Delahay, Kies, Duyckaerts,Gauguin and Charlot, and Bradbury, but no conclusive remarks have beenobtained by these authors as to the choice of optimum experimental conditionssuch as the applied voltage, the initial concentration of the solution to betitrated, the temperature, the electrode area, the stirring rate, the resistancein the circuit and the sensitivity of the galvanometer. This situation hashandicapped the wide applicability of this method, although it yields accurateresults and requires only inexpensive equipment. In the above mentioned theories, it is generally assumed that the iR dropin the circuit may be neglected i. e., the concentration overpotential E_πis equalto the applied voltage E and will not change in the course of the titration.But it is found experimentally that the magnitude of the resistance in thecircuit will greatly effect the shape of the titration curve and the sharpness ofthe end point. In fact, if we want to increase the sensitivity of the method(i. e., to titrate very dilute solutions), it is necessary to insert a high resistance(as high as a mega ohm) in the circuit in order to have a sharp end point In view of the above considerations we have derived the equations, g=i/i_0 =xSE~(-1)(Y_B-1)/(Y_B+1), 0≤x<0.5 (1a) g=0.5SE~(-1)(Y~(1/2)-1)/(Y~(1/2)+1) x=0.5 (1b) g=(1-x)SE~(-1)(Y_A-1)/(Y_A+1), 0.51 (1e)for the intensity of current i as a function of the "fraction x being titrated"(at the end point, x=1) during the titration of A with D as shown by thefollowing reaction: A+D=B+C (2)where A/B and C/D are two reversible redox pairs. In these equations, g=the ratio of the current i at any given stage during the titrationto that i_0 which would be obtained if the concentration overpotential E_π were zero. This latter quantity is equal to the applied voltage E divided by thetotal resistance R in the circuit, i. e., i_0=E/R. S="the dead-stop titration constant" which determines the shape ofthe titration curve and is equal to the product of three quantities: 1) thediffusion current constant of A, k_A, 2) the initial concentration of A, C_0, 3)the total resistance, R; i. e., S = k_AC_0R. K=the equilibrium constant of the reaction (2). α=the ratio of the diffusion current constant of D to that of A, i. e.,α=k_D/k_A. Y_A=the ratio of the concentration of A at the anode, (A)_a, to that atthe cathode, (A)_c, i. e., Y_A = (A)_a/(A)_c; similarly, Y_B=(B)_c/(B)_a; Y_c= (C)_a/(C)_c; Y_D =(D)_c/(D)_a. Y=Y_AY_B=Y_CY_D=exp{(1-g)nFE/RT}, where n, R, T have theusual meaning as used in electrochemistry. At any given stage of titration, x and Y are known, then Y_j's (j=A, B,C, D) may be calculated as follows: Y_j=Q(Y-1)+(Q~2(Y-1)~2+Y)~(1/2) (3)In the above expression, when j=A, Q=x-0.5; when j=B, Q=0.5-x;when j=C, Q=0.5-1/x; when j=D, Q=1/x-0.5. Since g is a measurable quantity, Y is a function of g and E, so thatequation (1b) provides a convenient means to evaluate S and hence k_A. Differentiating (1c) with respect to x, we obtain (dg/dx)_(x→1)=-SE~(-1)(Y-1)/(Y+1) (4)this is the expression for the steepness of the current change near the endpoint. The theoretical titration curves and their slopes near the end point as cal-culated with the aid of the equations (1), (3) and (4) were plotted in Fig. 2 (p. 8),where the applied voltage being fixed at 59 mv but the dead-stop titrationconstant S has been varied tenthousand-fold. From this figure we may drawthe following conclusions: (1) At the given applied voltage, the larger the S the steeper the titra-tion curve. Steeper curve will give more sharp end point, but it is not ad-vantageous if the curve is too steep, since there will be no warning whenapproaching the end point and a drop of the reagent may be sufficient to causea jump from the left to the right branch of the titration curve over thecurrent minimum. The most suitable value of S is in the order of magnitudeof ten. (2) For the titration of Ce (IV) with Fe (II) at room temperature usingtwo platinum foil electrodes of area of about 0.8 square centimeters, we foundk_A is in the order of magnitude of 0.1. Since S=k_AC_0R the product of C_0and R should be in the order of magnitude of 10~2. If C_0=10~(-3)M then a resistanceof about 10~5 ohms should be inserted. (3) Since k_A=nFAD_A/δ, the factors which determine k_A are: the elec-trode area A, the diffusion coeficient D_A and the effective thickness of the diffusion layer δ, these latter quantities are effected by the temperature andthe viscosity of the solution, the rate of stirring, etc. Fig. 3 is a similar plot, but in this case S is fixed at 0.59, while E variesfrom 5.9 to 590 mv. From this figure we see that the slopes of the titrationcurves for E=295 and 590 mv are smaller than those for E=118, 59 and 5.9mv, so that an applied voltage over several hundreds mv is usually disadvan-tageous in the dead-stop titration. On the other hand, too small an appliedvoltage is also inconvenient because then a much more sensitive galvanometermust be used and the current readings will sometimes be erratic due to sometemporary polarization effects. The experimental test of the above theory will be reported in the nextcommunication.

    (1)本文讨论只指示电极电流滴定法(永停法)的理论,推导考虑线路电阻的且能适用於各滴定阶段的一般公式,根据这些公式可以算出不同实验条件下的理论滴定曲线。 (2)定量讨论决定终点附近电流突跃大小的各种因素,为选择永停法的最优实验条件提供一些根据。 (3)提出测定扩散电流常数的简便方法。

    An experimental verification of the theoretical peak current equation forreversible electrode reactions of the Randles-Sevcik oscillopolarography, i_p=Kn~(3/2)D~(1/2)m~(2/3)θ~(2/3)α~(1/2)cμΑ, is carried out with both single- and multisweep methods. Themultisweep method is essentially that of Delahay, while a simplified circuit isdevised for the single-sweep procedure. The constant K in the above equation has been worked out by Randlesand Sevcikc, but their values differ by some twenty-one percent. Experimentalresults...

    An experimental verification of the theoretical peak current equation forreversible electrode reactions of the Randles-Sevcik oscillopolarography, i_p=Kn~(3/2)D~(1/2)m~(2/3)θ~(2/3)α~(1/2)cμΑ, is carried out with both single- and multisweep methods. Themultisweep method is essentially that of Delahay, while a simplified circuit isdevised for the single-sweep procedure. The constant K in the above equation has been worked out by Randlesand Sevcikc, but their values differ by some twenty-one percent. Experimentalresults as to which K value is correct have been contradictory. The authorspoint out that Sevcik's value of K is too low, due to the error in choosing too largea unit in his numerical integration. By taking smaller units and reperformingthe integration, the K value increases and approaches that of Randles. Thus thecorrectness of Randles' K value is ascertained and this value is used in calculatingthe theoretical slope. Their single-sweep results, with concentrations from 2×10~(-4) to 1×10~(-3) m/l andα~(1/2) from 1 to 4 volts/sec, agreement between experimental and theoretical slopesis obtained in the case of Tl~+ in m NaCl. In the case of Cd~(++) in m NaCl, experi-mental results deviate from the theoretical value, and the deviation increases withincreasing c and α~(1/2). Contrary to an unproven idea of Delahay, i_p obtained bymultisweep method is higher than that by the single-sweep procedure. However,in calculation of the theoretical values, a value of 15.0×16~(-6) obtained by polarLographic method is used for D of Tl~(+) in m NaCl. The use of the value of Dat infinite dilution is thought to be unjustified. If a D value of 15.0×10~(-6) is used,Delahay's results of Tl~+ in KNO_3 would be higher than the theoretical equationinstead of agreeing with it. This fact seems to support the findings of this paper. Various methods of correcting for capacity currents are compared and discus-sed. The authors point out that at α~(1/2) less than 2 volts/sec, the method of drawingan hbrizontal line introduces no appreciable error while at, high α, various methodsyield different results. This fact lowers the accurraey of data obtained at high α. The iR drop in the electrolytic cell and on the series resistance causes themeasured α to be different from the a actually applied on the drop electrode. Anelementary approximate correction of this effect is mentioned. Results after thiscorrection show that the deviation of Cd~(++) from theoretical at high c and α maybe due partly to this effect.

    (1)以单波法及多波法验证Randles-Sevcik示波极谱理论公式之i_p~c及i_p~α~(1/2)关系,多波法用Delahay线路,单波法则用简化线路。单波法之结果,对亚铊离子在m氯化钠中,在2×10~(-4)~1×10~(-5)m浓度,α~(1/2)为1及4伏特/秒,实测结果和理论符合。镉离子在m氯化钠中,实测结果与理论有偏差,偏差随浓度及α~(1/2)加大而加大。多波法之i_p实测值高于单波法。 (2)在计算理论曲线时,作者肯定Sevcik之系数过低而采用Randles数值。亚铊离子于m氯化钠中之扩散系数D,采用极谱法测得之数值15.0×10~(-6)而不用无限稀时之D值(20.0×10~(-6))。 (3)在α~(1/2)低于2伏特/秒时,可用画水平线法扣除电容电流。在高α时各种扣除电容电流方法所得结果不同,影响结果之可靠性。 (4)电解池线路上之iR降使加在滴汞电极上之α改变。这种改变使实测i_p值偏低。作者曾作初步近似修正,结果说明α及浓度大时,镉离子实测数据对理论的偏差的一部分可能是由于iR降的作用。

     
    << 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ir的内容
    在知识搜索中查有关ir的内容
    在数字搜索中查有关ir的内容
    在概念知识元中查有关ir的内容
    在学术趋势中查有关ir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