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     Under its influence,the usefulness of the conventional SIMS,i. e. M±-SIMS (detection of M+ or M- atomic secondary ions,M is the element to be analyzed),is limited.
     受其影响,常规SIMS,即M±-SIMS(检测原子型二次离子M+或M-,M是要分析的元素)的适用范围受到了很大的限制。
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     The energy variation during the formation of the titled endohedral complexes X@C60 (X=atoms of the Group IA or the Group VIIA), and the bonding nature andthe variation character of the interaction in C60 cage all have been investigated from the viewpoint of intramolecular interaction.
     系统地研究了内嵌复合物X@C60(X=第IA族或第VIIA族元素)形成过程的能量变化,以及其中笼环境下X与C60间相互作用的变化特征与键本质.
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     To improve the rising characteristics of MmNi 5 based hydrogen absorbing alloys,Mm(NiCo MnAl) 5 x M x (M is the fifth kind of substituted element)was studied.
     为提高混合稀土镍基贮氢合金的活化性能,研究了贮氢合金Mm(NiCoMnAl)5-xMx(M为添加的第五元素)
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     The abundances and associations of Ag, Au and PGE in the two gold deposits related to carbonatized ultrabasic rock massives in Mojiang, Yunnan and Jianchaling, Shaanxi provinces are summarized as follows:1 . There are three kinds of correlations between Ag and Au in these deposits, i. e., Ag in the siliceous rock type of gold ore and other types of ores with lower gold grade has no correlation with Au;
     云南墨江金矿和陕西煎茶岭金矿中Ag、Au和PGE(铂族元素)的丰度和共生状况如下:(1)两矿床中的Ag-Au关系呈三种情况:硅质岩型矿石和其他类型低品位金矿石中Ag-Au基本上不具相关关系;
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     Except for gold, other elements including chalcophile elements such as As,Sb,Bi,show significantlydifferent distribution patterns from Ir.
     除了金之外,其他元素(包括As、Sb、Bi等亲硫元素)在不同粒级中的分布形式与铱显著不同。
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     % Cu element were doped in the KNNT.
     %的Cu元素
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     Elementoorganic Chemistry
     元素有机化学
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We consider some remarkable central elements of the universal enveloping algebraU(gl(n)) which we call quantum immanants.
      
The least upper bound for the degrees of elements in a system of generators turns out to be independent of the number of vector variables.
      
An important class consists of those that we calln-coset groups; they arise as orbit spaces of groupsG modulo a group of automorphisms withn elements.
      
We give a characterization of those elements ofW whose reduced expressions avoid substrings of the formsts wheres andt are noncommuting generators.
      
A basis is calledmonomial if each of its elements is the result of applying to a (fixed) highest weight vector a monomial in the Chevalley basis elementsYα, α a simple root, in the opposite Borel subalgebra.
      
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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...

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。

It is well-known that blue brittleness and temper brittleness of steel are related to diffusion and precipitation in steel. An attempt was made in the present research to investigate this problem by means of internal friction measurements. Experiments show that the diffusion of carbon in α-iron is not affected by carbon concentration, alloying elements and the stage of precipitation in iron. The diffusion of nitrogen in α-iron is, however, hindered by the addition of alloying elements, and is enhanced during...

It is well-known that blue brittleness and temper brittleness of steel are related to diffusion and precipitation in steel. An attempt was made in the present research to investigate this problem by means of internal friction measurements. Experiments show that the diffusion of carbon in α-iron is not affected by carbon concentration, alloying elements and the stage of precipitation in iron. The diffusion of nitrogen in α-iron is, however, hindered by the addition of alloying elements, and is enhanced during the initial stage of precipitation.

一般认为钢的变脆例如蓝脆和回火脆都与钢中的扩散和沉淀有关系。本文尝试用内耗测量的方法研究碳与氮在α-铁及碳素钢中的扩散、脱溶和沉淀,从而进一步地了解钢的变脆的机构。实验的结果指出,碳在α-铁中的扩散不受自身浓度、合金元素和沉淀历史的影响。氮的情形与碳显著不同,合金元素使氮的扩散变慢,在沉淀初期使氮的扩散加速。 较有系统地研究了碳、氮在加工后的α-铁中脱溶时所引起的内耗峰(当振动频率约为每秒1周时出现在250℃左右),发现了高温淬火在含碳或氮较多的试样中所产生的内应力也可以引起这个内耗峰。实验指出:①这个脱溶内耗峰的出现条件与钢的蓝脆的出现条件相同,都是一种应变时效或淬火时效的现象;②与这个内耗峰有关的碳、氮是处于原子的状态。这些联系使我们认为钢的蓝脆是一种应变脱溶或淬火脱溶的过程,是由于原子状态的碳或氮聚集于钢中的内应力区域或晶体缺陷(例如原子脱节)中所引起来的。关于这方面的深入研究正在继续进行中。 根据本实验及以前关于钢铁中碳氮的扩散、脱溶和沉淀所得的结果,对于钢的回火脆的机构也提出了一种初步的看法。回火脆是一种回火沉淀的过程,引起回火脆的沉淀似乎是氮化物而不是碳化物。

In the spectrochemical analysis of high speed steels with a small current activated a.c. arc (after Aбрамсон), the results of analysis were found to be affected by different previous heat-treatments given to the steel samples. To study this effect we selected 10 chromium steel samples of different carbon content. Spectrochemical analysis of these samples under different procedures of heat treatment shows that with an a.c. arc (5 amp.) the results of analysis of Cr for annealed and for hardened samples of the...

In the spectrochemical analysis of high speed steels with a small current activated a.c. arc (after Aбрамсон), the results of analysis were found to be affected by different previous heat-treatments given to the steel samples. To study this effect we selected 10 chromium steel samples of different carbon content. Spectrochemical analysis of these samples under different procedures of heat treatment shows that with an a.c. arc (5 amp.) the results of analysis of Cr for annealed and for hardened samples of the same steel are different and the difference increases with the increase of carbon content. We are inclined to think that in a low energy light source, the evaporation and the excitation of the alloying elements vary according to the existing form of carbon and this directly affects the results of spectrochemical analysis. The magnitude of this effect is different for different alloying elements, it is considerable in the case of Cr but is inappreciable in the case of Mn and Si.

我们用爱氏光源(低电流交流电弧)作高速钢的光谱分析时,发现样品的组织结构对于分析结果有影响。为了对这个现象得到进一步的了解,我们选择了10种含碳量不同的铬钢进行热处理试验和光谱分析。一系列实验的结果指出,用小电流(5安)电弧光源时,铬的光谱分析结果由于试样是退火组织或淬火组织而有差别,这个差别又随着钢中含碳量的增加而增加。我们认为,这种影响是由于碳在试样中存在状态的不同所引起的。在低功率光源中,这种不同使合金元素被蒸发和被激发的情况有所差别,因而就影响了光谱分析的结果。这种影响由于合金元素之不同而有程度上的不同,对铬的影响很显著,对锰和矽的影响则很小。此外,所选择的分析线对是弧线还是火花线,对于这种组织结构的效应也有显著的影响。 曾经进行了一些消除组织结构影响的实验。发现在应用低功率光源时,增加预燃时间并不能消除这个效应。用火花光源或大电流(8安)电弧光源时,这种影响大为减小。

 
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