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mn
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     Model Complexes of Manganese-Containing Metalloenzyme: Studies on Synthesis, Structure and Properties of Mn(Ⅲ),Mn(Ⅳ) and Mixed-Valence Multnuclear Manganese Complexes
     金属酶模型配合物:Mn(Ⅲ)、(Ⅳ)及混合价多核配合物的合成、结构及性质研究
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     Investigation on the Austenitic Welding Material with Low Cr and High Mn Contents
     一种低铬高奥氏体钢焊接材料的研究
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     Hydrothermal Synthesis and Charaterization of Mn(Ⅱ)-substituted Aluminophosphates and Manganese Phosphates
     Mn(Ⅱ)取代磷酸铝和磷酸微孔化合物的水热合成与表征
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     ON THE BEHAVIOR OF HIGH TEMPERATURE CREEP OF A Mg-1.5% Th-0.8% Mn ALLOY
     镁-1.5钍-0.8合金高温蠕变行为的研究
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     THE FORMATION OF A β_Mn. TYPE PHASE IN SOME Fe-Mn-Al STEELS
     铁--铝系复相铜中的β_(Mn)型相变
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     Determination of the Mean Valence of Mn in Li_xMn_2O_yF_z
     Li_xMn_2O_yF_z中锰的平均化合价的测定
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     STOPPED-FLOW REVERSE FLOW INJECTION ANALYSIS FOR TRACE MANGANESE THE SYSTEM OF Mn~(2+)-NaH_2PO_2-KIO_4-NTA
     痕量锰的停流反相流动注射分析——Mn~(2+)-NaH_2PO_2-KIO_4-NTA催化体系
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     Synthesis and Crystal Structure of 2D Coordination Polymer [Mn(HIDC)(H_2O)]_n Constructed by 1H-imidazole-4,5-dicarboxylate Ligand
     咪唑-4,5-二羧酸锰的2D配位聚合物[Mn(HIDC)(H_2O)]_n的合成与晶体结构
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     there was no difference on the removal of Mn whatever Al_2(SO_4)_3·18H_2O or FeCl_3 was used;
     对于总锰的去除,Al_2(SO_4)_3·18H_2O和FeCl_3没有太大的差别;
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     The conditions for the determinations were: 4.0×10-5 mol/L salicyl fluorone (SAF), 0. O12%H2O2,, 2. 4×10-2 mol/L NaOH,and 60℃,The calibration graph was linear between 0. 1~2. 0μg/L Mn2+,and the detection limit was 0.02μg/L.
     本文据此建立了测定痕量锰的催化动力学分析法,测定条件为:4.0×10-5mol/L水杨基荧光配(SAF)0.012/H2O2,2.4×10-2mol/LNaOH,60℃。 线性范围为0.1~2.0μg/L,方法检测限为0.02μg/L。
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     Organic-Inorganic Hybridizing and Grafting of Sharpless Catalyst and Mn(salen) Catalysts, and Heterogeneously Asymmetric Epoxidation Reaction
     Sharpless和Mn(salen)催化剂的有机—无机杂化和表面嫁接及不对称环氧化反应
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     Synthesis and Characterization of Cathode Materials LiCo_(1-x)Mn_xO_2 for Lithium Ion Batteries
     锂离子电池正极材料LiCo_(1-x)Mn_xO_2的合成与表征
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     Mechanism of Actions of MN9202 on Cardiac Myocytes and Blood Vessels
     MN9202对大鼠心肌细胞和血管平滑肌的影响及其机制的探讨
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     Structure and Properties Study on La(NiMMn)_(5+x),Ti-Mo,Ti(Zr)/Mn_2 Base Laves Phase Hydrogen Storage Alloys
     La(NiMnM)_(5+x)、Ti-Mo和Ti(Zr)/Mn_2基Laves相系列储氢合金的结构与性能研究
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     Preparation and Magnetism of Zn_(1-x)TE_xO (TE=Mn,Co,Cu) Diluted Magnetic Semiconductors Bulk Samples
     Zn_(1-x)TE_xO(TE=Mn,Co,Cu)稀磁半导体块材样品制备及磁性
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  mn
In this note it is shown that a necessary and sufficient condition for the existence of a P3-factorization of complete multipartite graph λKmn is (1) m≥3, (2) mn≡0 (mod 3) and (3) λ(m-1)n≡0(mod 4).
      
Let Sn be the symmetric group, gi+=(123i), gi-=(li32) and Mn+={gi+∶4≤i≤n}, then Mn+ is a minimal generating set of Sn, where n≥5.
      
It is proved that Cayley graph Cay (Sn, Mn+∩Mn-) is Hamiltonian and edge symmetric.
      
Let Mn be a closed spacelike submanifold isometrically immersed in de Sitter space Spn+p (c).
      
Denote by R, H and S the normalized scalar curvature, the mean curvature and the square of the length of the second fundamental form of Mn, respectively.
      
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Many oxides of heavy metals when existing not in exact stoichiometric combining ratios exhibit the properties of a semi-conductor.The resistance ofsuch materials has a very large negative temperature coeffcient.Such thermallysensitive resistors,known as“thermisters”,have found wide range of appli-cations in thermometry,communication engineering,etc.In this investigationwe tried over hundred samples of metallic oxides and their mixtures fusedwith glass powder to form small compact bead on Pt lead wires.The sampleswere...

Many oxides of heavy metals when existing not in exact stoichiometric combining ratios exhibit the properties of a semi-conductor.The resistance ofsuch materials has a very large negative temperature coeffcient.Such thermallysensitive resistors,known as“thermisters”,have found wide range of appli-cations in thermometry,communication engineering,etc.In this investigationwe tried over hundred samples of metallic oxides and their mixtures fusedwith glass powder to form small compact bead on Pt lead wires.The sampleswere treated by a new firing technique which is very convenient in laboratory.Some samples made from mixed oxides of Mn,Co and Ni showing a resistanceof 10~4-10~5 ohms at room temperature and 10-100 ohms at 500℃ seem.verypromising for practical purposes.

多种重金属的氧化物,经高温煅烧后,均可呈现电子性半导体的性质,其电导随温度急剧变化,故可作测量温度之用,通常称热感电阻。从电导的对数与温度的倒数的图中,可以推算半导体电导性所需的电子能位差。本文试验氧化物混入玻璃粉制成的小珠,用半导体体内电热法制成热感电阻,在常温时的电阻值为10~4—10~5欧姆,在500℃时只有10—100欧姆。半导体与铂导体线间的电性接触,经实验推知是良好的。这种制备方法,在实验室里,非常简易。经多次试验,以混合锰、钴、镍的氧化物和玻璃粉制成的电导性较大,有实用价值。

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。

Further study of the effect of micro-structure of the sample electrode on the spectrochemical analysis of steels revealed that the effect on the analysis of W, Si and Ni all increases with the increase of the carbon content and for different analysis line pairs chosen, the effect not only differs in magnitude but also can be different in direction as was observed in the case of Cr in chromium steels. The effect on the analysis of Mn in all the steel samples studied is not significant. Structure effects...

Further study of the effect of micro-structure of the sample electrode on the spectrochemical analysis of steels revealed that the effect on the analysis of W, Si and Ni all increases with the increase of the carbon content and for different analysis line pairs chosen, the effect not only differs in magnitude but also can be different in direction as was observed in the case of Cr in chromium steels. The effect on the analysis of Mn in all the steel samples studied is not significant. Structure effects observed under different excitation conditions show that under the same excitation condition, the arc temperature which is indicated by the log intensity ratio of two iron lines of different excitation potential is higher when the sample electrode is of annealed structure; and in light sources of the same arc temperature the relative concentration of alloying elements to iron is higher when the sample electrode is of quenched structure. Since these two factors have opposite effect on spectral line intensities, the result of analysis will be different for different line pairs chosen. If the analysis line pair is homologous, the effect observed is due to a difference of relative concentration of different elements in the arc column alone, and the result of analysis is always higher when the sample electrode is of quenched structure. This may he explained by the fact that the presence of carbon in solid solutions decreases the interatomic forces or shows a lowering of energy of volatilization. This lowering is different for different elements but all increases with the increase of carbon content.

在过去工作的基础上,进一步观察了合金钢的组织结构对于钨、镍、硅、锰的光谱分析的影响和碳钢的组织结构对于硅、锰的影响。这些影响都是随着钢中含碳量的增加而增加,对与不同元素有程度上的不同。改变激发条件的试验结果指出:1)在同一激发条件下,淬火组织试样的弧温比退火组织的低;2)在同一弧温时,弧柱中合金元素与铁元素的浓度比值是淬火组织的比退火组织的高。由于这两个因素对于谱线强度所发生的影响的方向相反,所以在实际的光谱分析中,组织结构的影响便有不同的表现。 根据分析线对中的分析线与内标线的激发能差值的大小,可以说明为什么采用离子线或原子线作分析线对时所观察到的组织结构影响不同或者方向相反。当所用的分析线对比较均称时,淬火组织试样的分析结果总是比退火的高。引起组织结构影响的主要原因是由于在不同组织结构时蒸发情况的不同。试样中所含溶解碳量的增加使原子间力相应地减小,这可以解释为什么含碳量不同以及不同的合金元素引起不同的组织结构影响。

 
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