查询词典 kinetic theory

The anodic oxidation reactions of borohydride ion involves a novel and complex reaction system of three hydrogen valence states: protide H(superscript --protium H(superscript 0*-proton H(superscript +. Based on cyclic voltammetry and polarization studies, a multi-step mechanism for the oxidation of BH4-on Cu anode in NaOH solution was presented, and a kinetic expression containing the coverages of BH(superscript - subscript 4) and OH-adsorbed on the surface of Cu anode was deduced by the steady state approximation theory.

鉴于BH(上标-下标 4)阳极氧化反应涉及一个复杂的氢负离子H(上标-下标 4)－氢单原子H(上标 0*)－质子H之间价态转化的新颖反应体系，在循环伏安和极化实验研究基础上，提出了NaOH溶液中BH(上标-下标 4)在Cu电极上氧化反应的多步骤机理，导出了包含表面吸附态BH(上标-下标 4， ad)和OH覆盖率θ和θ的电极反应动力学方程。

This article researches affection of atmosphere pressure to hydro-kinetic force process by using fluid mechanics theory and works out amendatory method about pump allowable mounting height, wind pressure of centrifugal fan,rotor power and gas rotameter scale and algorithm of air-pressure pipe length of counter-current flow hight-order condenser in different atmosphere.

本文应用流体力学原理，研究了大气压对流体动力过程的影响，得出不同大气压时，泵的允许安装高度，离心式风机风压，轴功率，气体转子流量计刻度的校正方法和逆流高位冷凝器气压管长度的计算方法，对不同海拔高度地区，特别是高原和盆地地区具有十分重要的现实意义。

Finally, the thermodynamic and kinetic parameters have been investigated based on the statistical thermodynamics and transition state theory.

基於统计热力学方法和Eyring的绝对反应速率理论求得该反应的热力学和动力学参数。

The statistical thermodynamics and Eyring transition state theory with Wigner correction were used to study the thermodynamic and kinetic characters of this reaction.

用经Wigner校正的Eyring过渡态理论研究了不同温度下该反应的热力学和动力学性质。

The statistical thermodynamics and Eyring transition state theory with Wigner correction are used to study the thermodynamic and kinetic characters of this reaction from 100 K to 2050 K.

采用经Wigner校正的Eyring过渡态理论和热力学方法，研究了该反应通道的热力学及动力学性质。

In the first part, it was investigated the interaction between Pb2+ and La4Ti9O24 ceramic bulk. The result shows that a significant Pb2+ diffusion into La4Ti9O24 ceramic bulk and a significant crystallization of the La2/3TiO3-type phase is clearly observed in the Pb2+ diffusion layer. The reacted zone consists of the La2/3TiO3-type phase exhibits the linear dependence of the square of the thickness, x, on the heat-treated time, t, in excellent agreement with the parabolic law x2 = kt, where k is the growth rate coefficient. The kinetic study thus indicates that the Pb2+/La4Ti9O24 interaction strictly obeys the theory of the reactive diffusion. Furthermore, the experimental k values were used to determine the associated activation energy, Ea, for the formation of La2/3TiO3-type phase using the Arrhenius plot and the following least-square equation, ln =-Ea/RT + A, where T is the annealing temperature, R is the universal gas constant, and A is a constant, resulting in Ea ~ 607 ?b 60 kJ/mol.

首先， 以巨观的方式观察PbO与La4Ti9O24陶瓷体介面的反应现象；利用X-ray绕射分析以及扫描式电子显微镜来观察不同的热处理温度以及不同的持温时间所制作的样品，研究结果发现， Pb2+离子会渗入到La4Ti9O24陶瓷内，同时在Pb2+离子所渗入的区域内会产生新的La2/3TiO3-type钙钛矿斜方晶相；藉由量测不同温度与时间之样品，其因Pb2+离子渗入而产生之La2/3TiO3-type相层厚度之关系，符合反应式扩散机制中 x2 = kt 之关系式(其中 x：扩散层厚度； k：反应速率常数； t：反应时间)；进一步将不同实验条件所得到之反应速率常数值代入Arrhenius方程式ln (k =-Ea/RT + A ，其中Ea：活化能； T：绝对温度； R：气体反应常数； A：常数，可以求得Pb2+离子与La4Ti9O24陶瓷发生反应式扩散所需之活化能为607 ± 60 kJ/mol。

Discussion on membrane formation mechanismBased on the Flory-Huggins theory, Phase equilibrium equations of PVDF/DMAc/water ternary system were wrote out, and the binodal and spinodal lines in the phase diagrams of the system were obtained via numerical calculation. Combined the kinetic description and the thermodynamic phase diagram, membrane formation process were analyzed, which prepared the theoretical foundation for the further membrane formation mechanism research.

论文主要从如下四个方面展开：(1)PVDF疏水膜成膜分相机理探讨基于Flory-Huggins理论推导了三元制膜体系凝胶分相组成的线性表达式，并通过&浊点法&测定了PVDF／N，N-二甲基乙酰胺／水／成膜体系的凝胶边界线组成，通过对实验数据的拟合，得到了简捷直观的线性表达式，ln(φ_1)/(φ_3)=bln(φ_2)/(φ_3)+a，误差小于3％。

M/s. The following dimensionless relationships were obtained: Sh=2+0.073Re〓Sc〓〓〓 The desulphurization process by powder injection and blowing in RH refining of molten steel and its mechanism have been considered and analyzed. Based on the tworesistance mass transfer theory and the mass balance of sulphur in the system, a kinetic model for the process has been developed. The related parameters of the model have been reasonably determined. Modeling and calculations for the process by injecting and blowing the lime based powder flux under the assumed operating modes in a RH degasser of 300t capacity have been carried out using the model.

考虑颗粒与液流的相对速度，RH—PTB条件下熔池传质特性可由下式表征： Sh=2+0.073Re〓Sc〓考虑紊流中脉动速度引起的能量耗散，RH—PTB条件下熔池传质过程服从如下关系：〓将粉剂颗粒与钢液间的传质当作刚性的气泡与钢液间的传质处理，对RH—PTB过程有：〓考察和分析了RH喷粉脱硫过程及机理，基于双重阻力传质理论和体系内硫的质量衡算，建立了RH喷粉脱硫过程的动力学模型，确定了模型各有关参数，包括各传质系数和脱硫处理过程中钢液内参与脱硫反应的粉剂量等。

In order to reflect the catalyst deactivation during the oxidative polymerization and difference of the reactivity between monomer,the oligomer soluble in water,and the oligomer unsoluble in water,a new heterogeneous kinetic model was proposed according to Flory statistical theory.It was found that the polymerization rate estimated by the new model was consistent with the calculated data.

根据DMP氧化聚合过程中催化剂随时间延长而逐渐失活，不同种类的苯氧阴离子活性不同以及非均相聚合特点，提出了水介质中DMP氧化聚合动力学模型，并采用多元非线形回归计算得到模型参数，采用模型计算得到的聚合速率与实验测定值一致，证明所提出模型的正确性。

A high-resolution Differerntial Thermal Analysis apparatus was used to sinter the mixture of Mg and B powder and monitor the reaction process. Based on the classical sintering theory and multiple scan kinetic analysis method, the formation process and mechanism of polycrystalline MgB2 during in-situ sintering process were systemticlly investigated and the optimal sintering process was determined.

上述研究包含的主要内容和获得的结论有：利用高精度差热分析仪对Mg粉和B粉的混合试样进行烧结处理并同步监控其反应进程，在实验分析的基础上，结合经典烧结理论和多重扫描动力学分析方法，系统研究了原位烧结制备过程中多晶MgB2相的形成过程及成相机理，并确定了最佳烧结工艺。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了