Seamless pipeKinetic strength in grain growth is evaluated for HAZ of welded pipes. Austenite grain growth is dependant on the thermal cycle and the material properties. In this research the influence of thermal cycle is evaluated using characteristic time constant and characteristic temperature. These...
chalcogenide glassesmeyer-neldel rulepre-exponential factorisothermal crystallizationrate constantMany activated phenomena, including solid state diffusion in crystals... N Mehta,A Kumar - 《Materials Letters》 被引量: 52发表: 2006年 Some methods for kinetic studies of non-isothermal crystallization in Sn...
E– activation energy A –“ pre - exponential factor ”:活化能E––“预指数因子”E,a,A,活化能,pre,E活化能,Pre,活化,E活化能,活化能E 文档格式: .pdf 文档大小: 83.0K 文档页数: 4页 顶/踩数: 0/0 收藏人数: 0 评论次数: 0
A technique for establishing the temperature dependence of the rate constant by utilizing the isoconversional values of the activation energy and preexponential factor is explained. It is stressed that that the experimental effects that involve changes in the preexponential factor can be traced to the...
Exponential value in SQL statement: text Cause: The precompiler found a syntax error while parsing a number coded in scientific notation. The precompiler expected to find a signed integer following the exponentiation indicator (E), but found something else. Action: Reformat the number correctly...
The exponential reduction in the incidence of recovery with time suggests an empirical cutoff for the duration of the monitoring period. An extended duration of monitoring (15 to 20 minutes at least) is compatible with the current low recurrence rates observed in our laboratory.24 The ablation of...
Based on 57 literatures,the quantitative relations among the apparent activation energy,E,apparent pre-exponential factor,k0 and volatile content on dry ash free basis,Vdaf,fuel ratio(FR) data from TGA experiments were obtained for 131 Chinese power coal samples.Regression was made for lg k0,E ...
The well-known methods of Coats-Redfern, Freeman-Carroll, and Achar et al. are modified to include the temperature dependence of the pre-exponential factor in the Arrhenius expression for the rate...H. R. PettyE. T. ArakawaJ. K. Baird...
2j). Exponential decay functions were fitted to these data using nonlinear least-squares regression in the MATLAB Curve Fitting toolbox (robust, trust-region-reflective method). Gamma burst detection Recurring bursts of gamma (Fig. 1a and d) during wakefulness were detected as peaks in the mPFC...
Pre-exponential factor [s−1] Ea,ci Activation energy for chilling injury [J∙mol−1] CIincidence Incidence of chilling injury [%] I Respiration-driven quality indicator [%] A0 Initial fruit quality [%, score, °Brix] k0,quality Quality rate constant [s−1] Ea,quality Activation ene...