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activity data
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  活度数据
     Based on of the activity data of each component of a CaO-SiO2-Al2O3-MnO system calculated by thermodynamic software FactSage,the formation condition of plastic inclusions in the CaO-SiO2-Al2O3-MnO system was discussed by thermodynamic calculation.
     利用热力学计算软件FactSage计算出CaO-SiO2-Al2O3-MnO四元系各成分的活度数据,并通过热力学计算分析了帘线钢获得良好变形能力的CaO-SiO2-Al2O3-MnO四元系夹杂物生成所需的条件,验证了本文所介绍方法的可行性.
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     Further analysis indicates, however, that up to now the activity data on carbon in ferrite are not accurate enough for obtaining the C-C interaction energy in ferrite with the clear physical significance.
     然而分析表明,迄今碳在铁素体中活度数据仍欠精确,尚难依据它来确定具有明确物理意义的铁素体中C-C交互作用能数值。
短句来源
  活性数据
     On the basis of these structures and other reported crystal structures of Robdosia, joined with the reported antitumor activity data, the structure activity relationship was proposed.
     结合已有报道的香茶菜二萜化合物的晶体结构,以及药理活性数据,对其结构与抗肿瘤活性之间的关系进行初步的预测。
短句来源
     Mutagenic activity data of 86 epoxides were collected from a CD system of Registry of Toxic Effects of Chemical Substances (RTECS 1998 Version).
     由化学物质毒性效应登录 (RTECS) 1 998年光盘系统检索获得 86种环氧化合物对鼠沙门氏菌致变活性数据 .
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  活动资料
     Using Gutenberg-Richter magnitude- frequency relation log N =a-bM as the basic formula, the recurrence period of earthquakes with different magnitudes TM = m·10bM-a and the maximum magnitude M1= a/b have been deduced. And the occurrence time and maximum magnitude of forthcoming strong earthquakes can be quantitatively calculated by recently seismic activity data concerning the seismogenic process of strong event.
     以古登堡-李希特的震级-频度关系式logN=a-bM为基本公式,导出计算不同震级地震复发周期T_M=m·10~(bM-a)和最大震级M_1=a/b,利用与强震孕育有关的近期地震活动资料,可定量计算未来强震的发生时间和最大震级。
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  “activity data”译为未确定词的双语例句
     living in these houses with a questionnaire (including time_activity data)were conducted. Results The PM10 levels(μg/m3)of indoor and outdoor air were 518±27(kitchen),340±9(bedroom),287±9(yard),270±10(field) respectively, which were significantly higher than those in outdoor air(P<0.01).
     结果被调查地区存在严重的室内外空气污染 ,污染物以可吸入颗粒物PM10 为主 ,厨房、卧室、庭院、田间分别为(518±27)μg/m3,(340±9)μg/m3,(287±9)μg/m3,(270±10)μg/m3,室内污染水平显著高于室外 (P<0.01) ;
短句来源
     Concerning the activity data of 17 3,4-diaryl-3-pyrrolin-2-ones derivatives in 2 series, most compounds in series II exhibited comparable inhibitory effects with rofecoxib on COX-2, some of them also have high selectivity.
     2个系列17个3,4-二苯基-3-吡咯啉-2-酮衍生物的活性结果显示:系列Ⅱ中的大部分化合物显示出与rofecoxib近似的COX-2抑制活性,有些化合物对COX-2的选择性也很强。
短句来源
     From the activity data on theLa_2O_3- CaF_2 system, the activity of CaF_2 has been obtained by Gibbs- Duhem integration.
     此外,在三个不同温度(1600,1550,1500℃)下,将固态La_2O_3用石墨还原人液态锡,以求得La在锡稀溶液中的活度系数。
短句来源
     Combining the catalytic activity data and results of XRD characterization, the main active site of catalyst is considered as Cu~+.
     结合活性评价结果及不同还原温度下的XRD结果得出,Cu+是催化剂的主要活性物种。
短句来源
     Iso-silicon activity data for two sets of Fe-C-Si melt samples were determined by means of the common silver bath method at 1450℃. The experimental data were used to estimate the activity interaction coefficients εSiC, ρSiC and pSiSi,C in connection with the data of Fe-Si binary system determined in a previous work.
     用银浴法在1450℃测定了两组Fe-C-Si合金熔体的等活度(α_(Si))数据,由此计算了活度交互作用系数ε_(Si)~C,ρ_(Si)~C及ρ_(Si)~(Si,C);
短句来源
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      activity data
    The developed model was validated by standard QSAR parameters and through a detailed structural analysis of how it reproduces and explains the differences in the experimentally known activity data.
          
    We examine the advantages and disadvantages of the SSA method and the conditions for its applicability to an analysis of the solar-activity data.
          
    The present review summarizesin vitro activity data, pharmacokinetics, and clinical experience with teicoplanin, with special consideration of currently recommended doses and serum levels.
          
    The biological activity data considered were growth inhibition percentages ofT.
          
    Rate constants for GSH turnover were determined by least-squares iterative minimization from the specific activity data from 20 min to 108 h after [35S]cysteine administration.
          
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    In the previous paper,activities in liquid Fe-C alloys have been evaluatedfrom low carbon concentrations up to saturation with reference to pure liquidiron and solid graphite respectively as the standard states using Richardson andDennis' data on dilute solutions of carbon in liquid iron as the chief basis of cal-culation.Moreover,Smith's data on equilibrium between austenite and gaseousmixtures(CO_2/CO,CH_4/H_2)have been retreated to yield activities in austenitewith reference to pure γ iron and graphite respectively...

    In the previous paper,activities in liquid Fe-C alloys have been evaluatedfrom low carbon concentrations up to saturation with reference to pure liquidiron and solid graphite respectively as the standard states using Richardson andDennis' data on dilute solutions of carbon in liquid iron as the chief basis of cal-culation.Moreover,Smith's data on equilibrium between austenite and gaseousmixtures(CO_2/CO,CH_4/H_2)have been retreated to yield activities in austenitewith reference to pure γ iron and graphite respectively as the standard states.The purpose of the present paper is to make a thermodynamic analysis of theiron-graphite equilibrium diagram on the basis of these activity data and certainother data including the free energy of cementite,the derivation of which will bediscussed in another paper of this series.Direct experimental data on the solubility of graphite in ferrite are not avai-lable.Darken and Gurry as well as Hillert calculated the solubility of graphitein ferrite from that of cementite in ferrite determined by a number of investi-gators and the free energy of cementite calculated by Darken and Smith.In the present paper,the solubility of graphite in ferrite has been recalculatedusing the free energy of cementite calculated by the author and the results arecompared with the values reported in the literature.Wells' data on iron-graphite eutectoid equilibrium have been found to beessentially compatible with thermodynamic requirements.The agreement betweenthe experimental and the calculated values can,however,be still improved if 735°instead of 738° is chosen as the eutectoid temperature.Regarding the iron-graphite eutectic,the condition for equilibrium demandsthat the activities of iron in austenite and an iron-carbon melt both saturatedwith graphite at the eutectic temperature should be equal if the same standard state is used.It has been found in the present paper that this condition can bebetter fulfilled if 10.83 cal./g.atom/deg.is chosen as the heat capacity of liquidiron and 3650 cal./g.atom as the heat of fusion of iron.From an analysis of the δ iron-austenite-liquid peritectic equilibrium,it hasbeen found that a peritectic temperature of 1495° and a liquid phase of 0.58%Care better than 1493° and 0.52%C reported by Adcock as well as 1499° and0.53%C calculated by Darken and Gurry.Finally,the liquidus and solidus curves of the austenite-liquid field have beencalculated,the latter being found to concave up slightly in contradiction withthe conventional Fe-C equilibrium diagram.

    根据Smith测定及经作者修正的奥氏体内的活度及作者计算的液态铁碳合金内的活度与碳化铁的热力学函数以及其他必需的关于铁碳稳定平衡的实验及计算数据,作者对铁碳相图的稳定平衡部分作了较全面的分析。作者的计算包括:(i)石墨在铁素体內的溶解度;(ii)铁素体、奥氏体、石墨共析平衡;(iii)奥氏体、铁液、石墨共晶平衡;(iv)δ铁、奥氏体、铁液包晶平衡;(v)奥氏体、铁液二相区域的液相线及固相接。计算结果示于图3,此图与现行铁碳相图颇有不同之处。

    Concluding this series on thermodynamic study of the Fe-C system,the presentpaper deals with an analysis of the metastable iron-cementite equilibrium on thebasis of the activity data derived previously by the author and the free energy ofcementite recalculated by the author in this paper.It has not been possible before to calculate the cementite eutectic temperaturedue to lack of data on activities in the liquid iron-carbon system.With the aid of the results of calculation in a previous paper,this...

    Concluding this series on thermodynamic study of the Fe-C system,the presentpaper deals with an analysis of the metastable iron-cementite equilibrium on thebasis of the activity data derived previously by the author and the free energy ofcementite recalculated by the author in this paper.It has not been possible before to calculate the cementite eutectic temperaturedue to lack of data on activities in the liquid iron-carbon system.With the aid of the results of calculation in a previous paper,this temperature has been found tobe 1148°,or 5° below the graphite eutectic temperature.The cementite eutectoidtemperature 723°,determined by Mehl and Wells,is found to be consistent withthermodynamic requirements.Darken and Gurry chose 1146° as the cementite eutectic temperature andwith this value and certain other data calculated the free energy of cementite as afunction of temperature.On the basis of the more rigorously calculated cementiteeutectic temperature 1148° and the carefully determined cementite eutectoid tempe-rature 723° and certain other data,the free energy of cementite has been recal-culated by the author and found to be considerably different from Darken andGurry's results.The solubilities of cementite in austenite and in liquid iron respectively arethen calculated as functions of temperature.It should be pointed out,however,thatthe solubility of cementite in liquid iron thus calculated is only a first approximationand will certainly be revised in the future when more data on the free energy ofcementite at higher temperatures become available.A complete Fe-C equilibrium diagram including both stable and metastableequilibria has been constructed in the light of the results of this and a previouspaper.It is easily seen that certain important differences exist between the conven-tional and the revised diagrams.

    在本文中,作者首先计算了铁、碳化铁的共晶平衡,得出共晶温度为1148°;这在以前因为缺乏液态铁碳合金内的活度数据是不可能计算的。其次作者综合分析了前人数据,主要根据1148°的介稳共晶温度及723°的介稳共析温度,算出碳化铁的热力学函数。根据这样算出的碳化铁热力学函数及有关热力学数据,作者(i)复核了碳化铁的共析温度及共析点成分;(ii)计算了碳化铁在奥氏体内的溶解度;(iii)计算了碳化铁在铁液内的溶解度及碳化铁液相线与石墨液相线的相交温度。最后,根据本文及稳定平衡部分的计算结果,作者将现行铁碳相图加以修正,俾合于热力学的要求。但关于碳化铁在铁液内溶解度的计算仅属于初步近似性质,有待将来研究。

    The author's previous work indicated that the activity of granular fused iron catalysts decreased seriously with time due to the gradual plugging up of the pore volume of catalysts by the high boiling point products. In this paper, the activity data were treated with Wheeler's internal diffusion law mathematically. And the results suggest that the rate is a chemical controlling one in the initial period of the synthesis, and the coefficient of the catalysts surface is of 0.98 (with space velocity 1000...

    The author's previous work indicated that the activity of granular fused iron catalysts decreased seriously with time due to the gradual plugging up of the pore volume of catalysts by the high boiling point products. In this paper, the activity data were treated with Wheeler's internal diffusion law mathematically. And the results suggest that the rate is a chemical controlling one in the initial period of the synthesis, and the coefficient of the catalysts surface is of 0.98 (with space velocity 1000 hr~(-1), CO conversion 90% or so). When the catalysts pore volume are plugged up by the high boiling point products (whether the pore to be micro or macro), the rate becomes an internal diffusion controlling one, and the effectiveness of the catalytic surface changed into 0.082. The calculated coefficient of diffusion is of 2.4 10~(-5) cm~2/sec, which is in agreement with the magnitude of liquid-phase diffusion. Under the diffusional controlling conditions, the activity level of catalysts depends upon Deff, ks and Sg, by the rate law k∝2~(1/Deff·ks·Sg.) Where change of effective diffusivity. Deff, under the liquid phase conditions is not essential. But both the specific reaction rate, ks, and the effective surface, Sg are the major factors to the catalytic activity improvements. Therefore the precipited iron catalysts, owing to its high specific surface area and high specific activity, may be the promising one of the granular catalysts suitable for the high space velocity synthesis.

    已往的工作指出,顆粒熔鉄催化剂在合成过程中活性有随时間下降的現象,认为主要是由于腊液堵塞孔隙的关系,应用成型方法构成大孔,能够有利于腊液的流出,延緩了活性下降的时間,但当腊液堵滿孔隙时,活性下降的水平仍与未成型的顆粒催化剂相近。本文根据活性方面的数据,进行了宏观动力学的分析,由动力学計算再次指明:当腊液未堵塞孔隙吋,合成反应是化学反应控制,此时表面有效利用系数达0.98(空速1000,CO轉化90%以上)。而当腊液堵塞孔隙后,轉为液相扩散控制,对362-1大顆粒催化剂言,此时表面有效利用系数为0.082,并求得气体通过液柱的扩散系数为2.4×10~(-5)厘米~2/秒。在扩散控制的情况下,由动力学分析指明,能影响活性水平的主要是Deff、Ks、Sg。有效扩散系数Deff在液相扩散情况下的改变是不大的,增大孔径并不能提高扩散控制时的活性水平。因此,孔径的增大在合成烃情况下仅起延緩腊液的积聚作用,而不能提高終活性的水平。由动力学分析指出,沉淀剂由于有大的表面积(較熔鉄剂大数倍以至数十倍),因此,可能适用于高速固定床操作而不須进行再生。实驗也驗証了这个看法。

     
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