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Origin6.0软件在求解化学模型参数中的应用 被引量:10
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作者 陈虹锦 张卫 +2 位作者 李梅 马荔 谢少艾 《实验室研究与探索》 CAS 2004年第11期16-17,58,共3页
介绍了数学工具软件Origin6.0在化学模型参数求解中的线性拟合和非线性拟合的典型应用。Origin6.0改变了传统的求解模型参数的方法,提供了对数列直接进行函数拟合的方法,可以方便、迅速地求解出相当复杂的模型参数,并能同时得到建立模... 介绍了数学工具软件Origin6.0在化学模型参数求解中的线性拟合和非线性拟合的典型应用。Origin6.0改变了传统的求解模型参数的方法,提供了对数列直接进行函数拟合的方法,可以方便、迅速地求解出相当复杂的模型参数,并能同时得到建立模型的相关性检验数据。 展开更多
关键词 化学模型参数 ORIGIN 6.0软件 拟合
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动力锂离子电池关键参数估计方法研究进展 被引量:1
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作者 李远茂 刘桂雄 《中国测试》 CAS 北大核心 2024年第6期1-9,34,共10页
锂离子电池热失控、电化学模型参数和荷电状态等关键参数无法直接通过设备或无损方法进行直接测量,需通过复杂模型或算法进行估计,在参数估计方面仍然面临着挑战。该文对动力锂离子电池关键参数进行系统综述,包括动力锂离子电池热失控... 锂离子电池热失控、电化学模型参数和荷电状态等关键参数无法直接通过设备或无损方法进行直接测量,需通过复杂模型或算法进行估计,在参数估计方面仍然面临着挑战。该文对动力锂离子电池关键参数进行系统综述,包括动力锂离子电池热失控扩散建模、电化学模型参数估计、荷电状态参数估计等方法的基本原理、相关研究进展与应用,比较分析各类方法的优缺点及其适用对象,研究指出:研究电池包层级的热失控仿真技术有助于电池包的热扩散特性分析、电池热管理系统设计优化;电化学模型参数估计通常需应用元启发式算法,但选择合适的元启发算法仍需要深入研究、加强;深度学习网络+注意力机制、元启发式算法优化网络超参数等均为提升荷电状态参数估计性能重要方法。 展开更多
关键词 锂离子电池 热失控 化学模型参数 荷电状态
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长岭坳陷地区嫩江组一段页岩油资源评价 被引量:8
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作者 胡望水 张骜 +2 位作者 王长江 黄远鑫 曾文倩 《特种油气藏》 CAS CSCD 北大核心 2014年第1期46-49,153,共4页
针对长岭坳陷地区地质特征,进行页岩油勘探潜力分析。以泥页岩油气评价单元为基础模型,初步判断该泥页岩区域是否具有生成大范围页岩油藏的能力;结合地质实测数据资料,建立有机地球化学参数模型,系统地评价该区泥页岩的生油能力;进行储... 针对长岭坳陷地区地质特征,进行页岩油勘探潜力分析。以泥页岩油气评价单元为基础模型,初步判断该泥页岩区域是否具有生成大范围页岩油藏的能力;结合地质实测数据资料,建立有机地球化学参数模型,系统地评价该区泥页岩的生油能力;进行储量计算时,对关键参数的补偿系数进行校正,使页岩油储量的预算值更接近实际。利用该套综合评价标准,对长岭地区嫩江组一段进行页岩油评价预测,划分出研究区东侧和黑帝庙次凹东北部为有利区,其余地区为远景区,不存在目标区。 展开更多
关键词 页岩油 油藏评价 储量计算 泥页岩油气评价单元 补偿系数校正 地球化学参数模型 长岭坳陷嫩江组一段
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A Fuzzy-based Adaptive Genetic Algorithm and Its Case Study in Chemical Engineering 被引量:5
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作者 杨传鑫 颜学峰 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第2期299-307,共9页
Considering that the performance of a genetic algorithm (GA) is affected by many factors and their rela-tionships are complex and hard to be described,a novel fuzzy-based adaptive genetic algorithm (FAGA) combined... Considering that the performance of a genetic algorithm (GA) is affected by many factors and their rela-tionships are complex and hard to be described,a novel fuzzy-based adaptive genetic algorithm (FAGA) combined a new artificial immune system with fuzzy system theory is proposed due to the fact fuzzy theory can describe high complex problems.In FAGA,immune theory is used to improve the performance of selection operation.And,crossover probability and mutation probability are adjusted dynamically by fuzzy inferences,which are developed according to the heuristic fuzzy relationship between algorithm performances and control parameters.The experi-ments show that FAGA can efficiently overcome shortcomings of GA,i.e.,premature and slow,and obtain better results than two typical fuzzy GAs.Finally,FAGA was used for the parameters estimation of reaction kinetics model and the satisfactory result was obtained. 展开更多
关键词 fuzzy logic controller genetic algorithm artificial immune system reaction kinetics model
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Geometric Design of Anode-Supported Micro-Tubular Solid Oxide Fuel Cells by Multiphysics Simulations
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作者 施红玉 朱江 林子敬 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2017年第4期411-417,I0001,共8页
High volumetric power density (VPD) is the basis for the commercial success of micro-tubular solid oxide fuel cells (mtSOFCs). To find maximal VPD (MVPD) for anode-supported mtSOFC (as-mtSOFC), the effects of ... High volumetric power density (VPD) is the basis for the commercial success of micro-tubular solid oxide fuel cells (mtSOFCs). To find maximal VPD (MVPD) for anode-supported mtSOFC (as-mtSOFC), the effects of geometric parameters on VPD are analyzed and the anode thickness, tan, and the cathode length, lea, are identified as the key design parameters. Thermo-fluid electrochemical models were built to examine the dependence of the electrical output on the cell parameters. The multiphysics model is validated by reproducing the experimental I-V curves with no adjustable parameters. The optimal lea and the corresponding MVPDs are then determined by the multiphysics model for 20 combinations of rin, the inner tube radius, and tan. And all these optimization are made at 1073.15 K. The results show that: (i) significant performance improvement may be achieved by geometry optimization, (ii) the seemingly high MVPD of 11 and 14 W/cm^3 can be easily realized for as-mtSOFC with single- and double-terminal anode current collection, respectively. Moreover, the variation of the area specific power density with/cac(2 mm, 40 mm) is determined for three representative (tin, tan) combinations. Besides, it is demonstrated that the current output of mtSOFC with proper geometric parameters is comparable to that of planar SOFC. 展开更多
关键词 I-V relations Thermal fluid electrochemistry model Parametric optimization Volumetric power density Anode thickness
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Establishment of Kinetic Model for Catalytic Pyrolysis of Daqing Atmospheric Residue 被引量:4
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作者 刘熠斌 陈小博 +1 位作者 赵辉 杨朝合 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2009年第1期78-82,共5页
An 8-lump kinetic model was proposed to predict the yields of propylene, ethylene and gasoline in the catalytic pyrolysis process of Daqing atmospheric residue. The model contains 21 kinetic parameters and one for cat... An 8-lump kinetic model was proposed to predict the yields of propylene, ethylene and gasoline in the catalytic pyrolysis process of Daqing atmospheric residue. The model contains 21 kinetic parameters and one for catalyst deactivation. A series of experiments were carded out in a riser reactor over catalyst named LTB-2. The ki- netic parameters were estimated by using sub-model method, and apparent activation energies were calculated according to the Arrhenius equation: The predicted yields coincided well with the experimental values. It shows that the kinetic parameters estimated by using the sub-model method were reliable. 展开更多
关键词 catalytic pyrolysis kinetic model sub-model parameter estimation
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An Immune Self-adaptive Differential Evolution Algorithm with Application to Estimate Kinetic Parameters for Homogeneous Mercury Oxidation 被引量:12
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作者 胡春平 颜学峰 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2009年第2期232-240,共9页
A new version of differential evolution (DE) algorithm, in which immune concepts and methods are applied to determine the parameter setting, named immune self-adaptive differential evolution (ISDE), is proposed to... A new version of differential evolution (DE) algorithm, in which immune concepts and methods are applied to determine the parameter setting, named immune self-adaptive differential evolution (ISDE), is proposed to improve the performance of the DE algorithm. During the actual operation, ISDE seeks the optimal parameters arising from the evolutionary process, which enable ISDE to alter the algorithm for different optimization problems and improve the performance of ISDE by the control parameters' self-adaptation. The .performance of the proposed method is studied with the use of nine benchmark problems and compared with original DE algorithm ~nd-other well-known self-adaptive DE algorithms. The experiments conducted show that the ISDE clearly outperforms the other DE algorithms in all benchmark functions. Furthermore, ISDE is applied to develop the kinetic model for homogeneous mercury. (Hg) oxidation in flue gas, and satisfactory results are obtained. 展开更多
关键词 differential evolution immune system evolutionary computation parameter estimation
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Hybrid Differential Evolution for Estimation of Kinetic Parameters for Biochemical Systems 被引量:1
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作者 ZHAO Chao XU Qiaoling LIN Siming LI Xuelai 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2013年第2期155-162,共8页
Determination of the optimal model parameters for biochemical systems is a time consuming iterative process. In this study, a novel hybrid differential evolution (DE) algorithm based on the differential evolution te... Determination of the optimal model parameters for biochemical systems is a time consuming iterative process. In this study, a novel hybrid differential evolution (DE) algorithm based on the differential evolution technique and a local search strategy is developed for solving kinetic parameter estimation problems. By combining the merits of DE with Gauss-Newton method, the proposed hybrid approach employs a DE algorithm for identifying promising regions of the solution space followed by use of Gauss-Newton method to determine the optimum in the identified regions. Some well-known benchmark estimation problems are utilized to test the efficiency and the robustness of the proposed algorithm compared to other methods in literature. The comparison indicates that the present hybrid algorithm outperforms other estimation techniques in terms of the global searching ability and the con- vergence speed. Additionally, the estimation of kinetic model parameters for a feed batch fermentor is carried out to test the applicability of the proposed algorithm. The result suggests that the method can be used to estimate suitable values of model oarameters for a comolex mathematical model. 展开更多
关键词 parameter estimation kinetic model hybrid differential evolution Gauss-Newton feed batch fermentor
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An improved self-adaptive membrane computing optimization algorithm and its applications in residue hydrogenating model parameter estimation 被引量:1
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作者 芦会彬 薄翠梅 杨世品 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第10期3909-3915,共7页
In order to solve the non-linear and high-dimensional optimization problems more effectively, an improved self-adaptive membrane computing(ISMC) optimization algorithm was proposed. The proposed ISMC algorithm applied... In order to solve the non-linear and high-dimensional optimization problems more effectively, an improved self-adaptive membrane computing(ISMC) optimization algorithm was proposed. The proposed ISMC algorithm applied improved self-adaptive crossover and mutation formulae that can provide appropriate crossover operator and mutation operator based on different functions of the objects and the number of iterations. The performance of ISMC was tested by the benchmark functions. The simulation results for residue hydrogenating kinetics model parameter estimation show that the proposed method is superior to the traditional intelligent algorithms in terms of convergence accuracy and stability in solving the complex parameter optimization problems. 展开更多
关键词 optimization algorithm membrane computing benchmark function improved self-adaptive operator
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A New Optimal Control System Design for Chemical Processes 被引量:1
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作者 丛二丁 胡明慧 +1 位作者 涂善东 邵惠鹤 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2013年第12期1341-1346,共6页
Based on frequency response and convex optimization,a novel optimal control system was developed for chemical processes.The feedforward control is designed to improve the tracking performance of closed loop chemical s... Based on frequency response and convex optimization,a novel optimal control system was developed for chemical processes.The feedforward control is designed to improve the tracking performance of closed loop chemical systems.The parametric model is not required because the system directly utilizes the frequency response of the loop transfer function,which can be measured accurately.In particular,the extremal values of magnitude and phase can be solved according to constrained quadratic programming optimizer and convex optimization.Simulation examples show the effectiveness of the method.The design method is simple and easily adopted in chemical industry. 展开更多
关键词 control system frequency response convex optimization chemical processes
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Soft Sensor for Inputs and Parameters Using Nonlinear Singular State Observer in Chemical Processes 被引量:2
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作者 许锋 汪晔晔 罗雄麟 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2013年第9期1038-1047,共10页
Chemical processes are usually nonlinear singular systems.In this study,a soft sensor using nonlinear singular state observer is established for unknown inputs and uncertain model parameters in chemical processes,whic... Chemical processes are usually nonlinear singular systems.In this study,a soft sensor using nonlinear singular state observer is established for unknown inputs and uncertain model parameters in chemical processes,which are augmented as state variables.Based on the observability of the singular system,this paper presents a simplified observability criterion under certain conditions for unknown inputs and uncertain model parameters.When the observability is satisfied,the unknown inputs and the uncertain model parameters are estimated online by the soft sensor using augmented nonlinear singular state observer.The riser reactor of fluid catalytic cracking unit is used as an example for analysis and simulation.With the catalyst circulation rate as the only unknown input without model error,one temperature sensor at the riser reactor outlet will ensure the correct estimation for the catalyst circulation rate.However,when uncertain model parameters also exist,additional temperature sensors must be used to ensure correct estimation for unknown inputs and uncertain model parameters of chemical processes. 展开更多
关键词 soft sensor state observer "nonlinear singular system unknown inputs uncertain model parameters riser reactor of fluid catalytic cracking unit
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Modeling the Effects of Nutrient Dynamics and Surface Circulation on the Productivity of Hooghly Estuary
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作者 Saswati Dcb Arun Chakraborty 《Journal of Shipping and Ocean Engineering》 2012年第5期255-262,共8页
River estuarine environment plays a key role in the cycling of biological and chemical parameters and a significant region for the transaction of freshwater and seawater. In the present study, a first attempt has been... River estuarine environment plays a key role in the cycling of biological and chemical parameters and a significant region for the transaction of freshwater and seawater. In the present study, a first attempt has been made towards the development of a coupled three-dimensional hydrodynamic circulation model with four compartment (nitrate, phytoplankton, zooplankton and detritus) biogeochemical model in the Hooghly estuary (21 °36′-22° 16′1 and 87°42'-88°15′E) to simulate the varying effect of plankton biomass with the heavy input of anthropogenic litter from industrial effluents of Haldia port which is effecting the chemical and biological processes that control the plankton dynamics in the estuary. In-situ observational data for physico-chemical and biological parameters are collected from Calcutta University during 2010 are assimilated using multiscale OA (objective analysis) for different seasons and incorporated in ROMS (Regional Ocean Modeling System) to develop a high resolution (0.5 km x 0.5 kin) biogeochemical model. Recent analysis on physico-chemical parameters of the estuary is done as it is one of the largest estuaries in India and is the habitat for vast biodiversity. Influence of high nitrate (above 34 μg/L) and phosphate (5.22 μg/L) is predominant whereas DO (dissolved oxygen) is low (4.07 mg/L) in the Haldi River mouth which is sliding the productivity (less than 1 mg/L) and also affects water quality. 展开更多
关键词 Biogeochemical model Hooghly estuary OA PRODUCTIVITY ROMS.
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Theoretical Model of the Tropospheric Pressure Variation on the Height
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作者 Raul C. Perez 《Journal of Earth Science and Engineering》 2017年第3期175-180,共6页
In the study and the research of the troposphere, the knowledge about its pressure variation on the height is necessary and important. Of course, exist the sounding to make this work, but not always it is possible to ... In the study and the research of the troposphere, the knowledge about its pressure variation on the height is necessary and important. Of course, exist the sounding to make this work, but not always it is possible to access to sounding data when is necessary, so then, it is important to has others alternatives methods in order to replace it. The troposphere is basically a fluid, susceptible to be studied under the fluid mechanics and thermodynamics of the ideals gases without loss generalities. So, it is possible to study of the atmospheric air like as a continuous perfect gas. These facts are important questions to study the troposphere under the laws and beginning Physics, using its respective equations, in order to get a theoretical model to simulate the behavior of its thermodynamics variables and parameters. Working on this line, it was developed a model in order to simulate the tropospheric pressure variation on the height from its measure on surface data. 展开更多
关键词 Atmospherics pressure tropospheric pressure.
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Optical closure of parameterized bio-optical relationships
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作者 贺双颜 FISCHER Jürgen +1 位作者 SCHAALE Michael 贺明霞 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2014年第2期480-489,共10页
An optical closure study on bio-optical relationships was carried out using radiative transfer model matrix operator method developed by Freie Universitat Berlin. As a case study, the optical closure of bio-optical re... An optical closure study on bio-optical relationships was carried out using radiative transfer model matrix operator method developed by Freie Universitat Berlin. As a case study, the optical closure of bio-optical relationships empirically parameterized with in situ data for the East China Sea was examined. Remote-sensing reflectance (Rrs) was computed from the inherent optical properties predicted by these biooptical relationships and compared with published in situ data. It was found that the simulated Rrs was overestimated for turbid water. To achieve optical closure, bio-optical relationships for absorption and scattering coefficients for suspended particulate matter were adjusted. Furthermore, the results show that the Fournier and Forand phase functions obtained from the adjusted relationships perform better than the Petzold phase function. Therefore, before bio-optical relationships are used for a local sea area, the optical closure should be examined. 展开更多
关键词 optical closure ocean color remote sensing bio-optical relationship
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Comparison on Non-isothermal Oxidation between Spent Catalytic Cracking Catalysts and Coal
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作者 Men Xiujie Zhan Shuhong +2 位作者 Li Yanjun Wang Zijun Wang Xieqing (Research Institute of Petroleum Processing,SINOPEC,Beijing 100083) 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2010年第2期33-40,共8页
Oxidation of coke deposited on spent catalytic cracking catalysts was compared with that of coal and coal char via the non-isothermal oxidation means, i.e. the thermal-gravimetric analysis (TGA) and the differential... Oxidation of coke deposited on spent catalytic cracking catalysts was compared with that of coal and coal char via the non-isothermal oxidation means, i.e. the thermal-gravimetric analysis (TGA) and the differential thermal analysis (DTA). Oxidation kinetic parameters were further investigated by model-fitting methods. The test results showed that the oxidation of spent catalysts was a quite mild process, while coal and coal char experienced sharp weight loss during oxidation. The temperature for commencement and termination of oxidation increased in the following order: coal〈coal char〈spent catalysts, and the oxidation of the three tested materials displayed a self-catalytic nature, with their largest oxidation rate appearing at a weight percent of 24.96%, 34.21% and 57.93%, respectively. The oxidation of spent catalysts obeyed a random nucleation model for the first-order reaction, with Ea=206.13 kJ/mol and lgA=10.10, and the oxidation of coal could be a diffusion-controlled reaction mechanism, with Ea=161.61 kJ/mol and lgA=7.74, while the oxidation of coal char also obeyed a random nucleation model for the first-order reaction, with Ea= 149.36 k J/mol and lgA=7.89. 展开更多
关键词 spent catalysts COAL coal char non-isothermal oxidation TGA oxidation kinetics and mechanism
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