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kinetics of
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  动力学
     The Electrochemical Behaviors of Sb Irreversible Adsorption on Pt Single Crystal Electrodes and Kinetics of Hcooh Oxidation
     Pt单晶电极表面Sb的不可逆吸附及性能与甲酸电催化氧化反应动力学
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     Studies on Kinetics of Gas lasers and Optimal Designs of the Lasers with Large Power
     气体激光动力学研究及大功率激光器优化设计
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     Study on Thermodynamics and Kinetics of Preparetion Process for Potassium Titanate Whiskers
     钛酸钾晶须制备过程的热力学和动力学研究
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     Study on the Syntheses and Kinetics of Self-crosslinking Graft Copolymers of Starch
     自交联型淀粉接枝共聚物的合成与动力学研究
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     Study on the Atomization Kinetics of Chromium in Graphite Furnace and the Eco-Behavior of Chromium in the Environment
     铬的原子化动力学与环境铬的生态行为研究
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  动力学的
     Effeets of TiO_2 on the Crystallization Kinetics of CaO-P_2O_5-Al_2O_3-SiO_2 Glass
     TiO_2对CaO-P_2O_5-Al_2O_3-SiO_2玻璃析晶动力学的影响
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     Effect of pre-annealing on crystallization kinetics of amorphous Sm_5Fe_(74.3)Nb_(1.5)Si_(11.7)B_(4.5)C_(2.5)Cu_(0.5) alloys
     预退火对Sm_5Fe_(74.3)Nb_(1.5)Si_(11.7)B_(4.5)C_(2.5)Cu_(0.5)非晶合金晶化动力学的影响
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     Study on Crystallization Kinetics of AlF_3-MgF_2-CaF_2-SrF_2-BaF_2-RF_3(R=Y,Yb)Glasses by Differential Thermal Analysis
     用热分析方法对 AlF_3-MgF_2-CaF_2-SrF_2-BaF_2-RF_3(R=Y,Yb)玻璃析晶动力学的研究
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     Synthesis and Studies on the Non isothermal Kinetics of Thermal Decomposition of Complex Zn(C_9H_6O_5N_2)·2H_2O
     Zn(C_9H_6O_5N_2)·2H_2O配合物热分解非等温动力学的研究
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     Effect of Additives in Mg~(2+)、K~+∥Cl~-、SO_4~(2-)-H_2O System on Crystallization Kinetics of Potassium Sulphate
     Mg~(2+)、K~+∥Cl~-、SO_4~(2-)-H_2O体系添加剂对硫酸钾结晶动力学的影响
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  动力学研究
     Studies on Kinetics of Gas lasers and Optimal Designs of the Lasers with Large Power
     气体激光动力学研究及大功率激光器优化设计
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     Study on Thermodynamics and Kinetics of Preparetion Process for Potassium Titanate Whiskers
     钛酸钾晶须制备过程的热力学和动力学研究
短句来源
     Study on the Syntheses and Kinetics of Self-crosslinking Graft Copolymers of Starch
     自交联型淀粉接枝共聚物的合成与动力学研究
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     Kinetics of RAFT Based Living Free Radical Polymerization and Application in Synthesis of Complex Architecture Polymer
     RAFT调控的活性自由基聚合动力学研究及其在合成复杂结构聚合物上的应用
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     Study on the Technology of Flue Gas Desulfurization by Scrap Iron and Kinetics of Fe(Ⅱ) Catalyzed Oxidation of S(Ⅳ)
     铁屑法烟气脱硫工艺及Fe(Ⅱ)催化氧化S(Ⅳ)动力学研究
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     Studies on Relationship between GVHD and Tissue Distribution Kinetics of T Lymphocytes and Their Subsets after Allo-HSCT in a Murine Model
     小鼠Allo-HSCT后T淋巴细胞及其亚群组织分布的动态变化与GVHD关系
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     Theoretical Studies on Some Kinetics of the Hydrogen and Halogen Abstraction Reactions
     几类重要的氢迁移和卤素迁移反应的理论研究
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     Impact of Growth Hormone on Cell Cycle Kinetics of Pancreatic Cancer Cells and Significance of Growth Hormone Receptor-JAK2-STATs in Signaling
     生长激素对胰腺癌细胞生长周期的影响及生长激素受体-JAK2-STATs在信号转导中的意义
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     KINETICS OF DECOMPOSITION OF RETAINED AUSTENITE DURING TEMPERING IN SOME HIGH STRENGTH STEELS
     高强度钢中残留奥氏体在回火过程中的分解
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     THE PHARMACOKINETICS OF ~(14)C-GOSSYPOL ACETIC ACID IN——RATS Ⅱ.QUANTITATIVE STUDIES ON THE KINETICS OF THE DISTRIBUTION,EXCRETION AND METABOLISM OF ~(14)C-GOSSYPOL ACETIC ACID IN THE RAT BODY.
     ~(14)C-醋酸棉酚在大鼠体内的药物动力学研究——Ⅱ.在大鼠体内分布、排泄和代谢的动态的定量分析
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  kinetics of
Furthermore, the deswelling kinetics of the hydrogels was also studied by measuring their water retention capacity.
      
Isothermal crystallization kinetics of poly(trimethylene terephthalate) under the influence of self-seeding nucleation
      
The adsorption kinetics of reactive brilliant red K-2BP on the ACSS was accorded with the two-step kinetics rate equation and pseudo-second-order kinetics equation.
      
Kinetics of thermal decomposition of CeO2 nanocrystalline precursor prepared by precipitation method
      
In the present paper the adsorption kinetics of the hydrogen molecule on the (111) and (100) surfaces have been studied with the model proposed by Panczyk and the grand canonical Monte Carlo simulation method.
      
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The isothermal transformation of austenite in a ball-bearing steel within thetemperature range between martensite point M and room temperature has been investigated by electrical resistance measurements.The steel employed was ofcommercial production containing 1.43% Cr and 1.02% C and its martensite pointis 159℃ when quenched from 1100℃.The specimen was first quenched toroom temperature(in which state it contained 17% retained austenite),and thenupquenched to isothermal bath in which its transformation was followed.Theeffect...

The isothermal transformation of austenite in a ball-bearing steel within thetemperature range between martensite point M and room temperature has been investigated by electrical resistance measurements.The steel employed was ofcommercial production containing 1.43% Cr and 1.02% C and its martensite pointis 159℃ when quenched from 1100℃.The specimen was first quenched toroom temperature(in which state it contained 17% retained austenite),and thenupquenched to isothermal bath in which its transformation was followed.Theeffect of tempering of martensite was eliminated by employing two specimens ofdifferent martensite contents.1)By comparing the kinetics of isothermal transformation below and abovemartensite point,it was concluded that isothermal transformation below M pointtakes place by the martensite process and not by intermediate transformation(bainitic),in.spite of the presence of large amount of martensite and relativelyhigh temperature at which the transformation takes place.2)From kinetics considerations it appears that isothermal transformationof retained austenite to martensite takes place not by the formation of new nuc-lei but mainly by the growth of already existing martensite.This would alsoinfer that coherency between martensite and austenite is not destroyed(or notcompletely destroyed)during quenching transformation.3)The tempering of martensite appears to be the controlling process forthe isothermal transformation of retained austenite to martensite,such that theelastic strain energy relaxed by tempering of martensite exceeds the difference offree energies between the two phases.The activation energy of tempering ofmartensite within the temperature range considered(below 150℃)was found tobe 13,300 cal/mol,which compares favourably well with the value of 16,000 cal/molas given by Averbach and Cohen in 1953.4)The results show that isothermal keeping for prolonged duration at theneighbourhood of 100℃ brings about maximum amount of transformation of re-tained austenite.That is,at either higher or lower temperatures and for a speci-fied time,the amount of austenite-martensite transformation is less.This is signifi-cant for practical heat-treating of precision gauges and tools for which dimen-sional stability is important and high temperature tempering may not be de-sirable for hardness consideration.

用电阻法研究了含1.43%Cr,1.02%C的滚珠钢在室温到马氏体点(159℃)温度范围内奥氏体等温转变过程。结果指出在这一温度范围内的等温转变是以马氏体转变的形式进行的,而不产生中温转变形式的等温转变。当样品由1100℃淬火至室温后再“上淬”至低于马氏体点的温度进行等温保持时,部分的残留奥氏体即等温转变为马氏体。根据动力学的考虑,这一转变很可能不是通过形成新的晶核,而是已有马氏体晶体的长大过程。同时,这种转变主要受已有马氏体回火过程的控制。在100℃左右长期等温保持时可以得到最大的残留奥氏体转变量。更高或更低的温度,在同一时间内转变量都较100℃左右为小,这可作为精密量具刃具实际热处理的参考。

The kinetics of decomposition of retained austenite in AISI 4325,AISI 4340and their silicon modified steels has been studied by precision length measurement.It is found that the internal stresses play a very important role in the first instantof transformation.In steels with normal silicon content(0.2—0.3%),the activation energy of thedecomposition of retained austenite is about 35,000 cal/mole,comparable to thatrequired for the diffusion of carbon in γ-Fe.In general,high silicon content(1.5% Si)retards...

The kinetics of decomposition of retained austenite in AISI 4325,AISI 4340and their silicon modified steels has been studied by precision length measurement.It is found that the internal stresses play a very important role in the first instantof transformation.In steels with normal silicon content(0.2—0.3%),the activation energy of thedecomposition of retained austenite is about 35,000 cal/mole,comparable to thatrequired for the diffusion of carbon in γ-Fe.In general,high silicon content(1.5% Si)retards the transformation of retain-ed austenite in these steels.Based upon the isothermal transformation curvesand rate equation the activation energy for this transformation has been deter-mined to be about 44,000 cal/mole,and it is therefore suggested that the diffusionof silicon in γ-Fe surrounding the growing carbide particles is possibly the ratecontrolling factor.

用测量长度的变化,得出残留奥氏体在含硅量不同的Ni(2%)Cr(0.8%)Mo(0.25%)高强度低合金钢中在回火过程的分解曲线,在这些合金钢中,硅的含量为1.5%时,残留奥氏体的分解较慢。由其分解激活能的推论得到:在这个类型的合金钢中,含硅量较低时(0.2—0.3%),残留奥氏体的分解是由于碳在奥氏体中的扩散,而含硅量较高时(1.5%),硅的扩散可能成为残留奥氏体分解的控制因素。

A more general mathematical analysis of the kinetics of polycondensation-depolycondensation reactions is given in the article. Three different types of reactions are considered, namely, (1) reactions between molecules AB and AB, (2) reactions between molecules AA and BB, (3) reactions between molecules AA and BC. One of the condensation products is assumed (without loss of generality) to be water.For reactions of the first type, [p_n], the number of molecules of the n-mer (AB)_n, obeys the following Flory...

A more general mathematical analysis of the kinetics of polycondensation-depolycondensation reactions is given in the article. Three different types of reactions are considered, namely, (1) reactions between molecules AB and AB, (2) reactions between molecules AA and BB, (3) reactions between molecules AA and BC. One of the condensation products is assumed (without loss of generality) to be water.For reactions of the first type, [p_n], the number of molecules of the n-mer (AB)_n, obeys the following Flory distribution: [p_n]=N_0p~(n-1)(1-p)~2 where N_0 denotes the total number of AB segments (including the unreacted monomers). and p, as defined by is a measure of the degree of condensation. It is shown that p is the solution of the following differential equation: dp/dt=k/2N_0(1-p)~2-k_(-1)p[H_2O] where K and k_(-1) are velocity constants of condensation and hydrolysis respectively, and [H_2O] denotes the number of water molecules. Three special cases are discussed.For reactions of the second type, three different types of condensation products are possible besides water; they obey the following distributions: [p_(2n)]=2N′_0r~(n-1)p~(2n-1)(1-p)(1-rp) [p′_(2n-1)]=N′_0r~(n-1)p~(2n-2)(1-p)~2 [p″_(2n-1)]=N′_0r~(n-2)p~(2n-2)(1-rp)~2 where N′_0 and N″_0 denote the total number of segments AA and BB respectively, r denotes the ratio N′_0/N″_0, and p, as defined by is the solution of the following differential equation: dp/dt=kn′_0/r(1-p)(1-rp)-k_(-1)P[H_2O]For reactions of the third type, six different types of condensation products are possible besides water; they obey the following distributions: [P′_(2n)]=NP~(n-1)q~n(1-p/2-q/2)(1-p) [p″_(2n)]=Np~nq~(n-1)(1-p/2-q/2_(?))(1-q) [p_(2n-1)=Np~(n-1)q~(n-1)(1-p/2-q/2)~2 [p′_(2n-1)]=N/4p~(n-2)q~n(1-p)~2 [p″_(2n-1)]=N/4p~nq~(n-2)(1-p)~2 [p′″_(2n-n)]=∈(n)N/4p~(n-1)q~(n-1)(1-p)(1-q),where N denotes either the total number of segments AA or that of BC, while p and q, as defined by satisfy the following set of differential equations: dp/dt=k′N/2(1-p)(2-p-q)-k′_(-1)p[H_O] dq/dt=k″N/2(1-q)(2-p-q)-k″_(-1)q[H_2O]

本文討論AB型,AA和BB型以及AA和BC型分子间的缩聚-裂解反應,由動力学方程出發,得到这三种类型反應过程中高聚分子的分佈情况,并求得几种不同反應條件下的缩聚度p和q是何种時间的函数,利用它们和实验数值比較,可以求得縮聚反應速度常数K和水解反應速度常数k_(-1),并在AA和BC型分子间的反應中,可以求得K'和K″的此值,藉以比较官能團B和C的活潑度。还討論了三种平均分子量的表示式、数值以及它们相互的比值,後者僅在没有水解作用的情况下,才和Flory的结果相同。

 
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