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Combination method for Parallel Computation in ODEs

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Journal of Systems Engineering and Electronics 1996年第4期7卷 19-26页

作者： Song Xiaoqiu(Beijing Institute of Computer Application and Simulation Technology ) Beijing Institute of Computer Application and Simulation Technology P.O. Box 3929 Beijing 100854 P.R. China

In this paper, a 3rd order Combination method with three processes and a 4th order Combination method with five processes for solving ODEs are discussed. These methods are the Runge-Kutta method combined with a linear... 详细信息

关键词： Software Reliability Numerical analysis Combination method Parallel Computation,ODEs.

Behavior of phase transformation of Baotou mixed rare earth concentrate during oxidation roasting

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Journal of Rare Earths 2022年第6期40卷 981-987,I0005页

作者： Deliang Meng Meng Wang Zongyu Feng Chao Xia Yanyan Zhao Xiaowei Huang School of Metallurgy Northeastern UniversityShenyang 110819China National Engineering Research Center for Rare Earth Materials GRINM Group Co.Ltd.Beijing 100088China General Research Institute for Nonferrous Metals Beijing 100088China GRIREM Advanced Materials Co. Ltd.Beijing 100088China

Based on the new process named "Combination method" for metallurgy and separation of Baotou mixed rare earth concentrate(BMREC),the aim of this paper is to clearly elucidate the phase change behavior of BMREC without additives during oxidative roasting at 450-800℃.The results indicate that the bastnaesite in BMREC is decomposed at 450-550℃,the weight loss is about 10.3 wt%,and the activation energy(E) is 144 kJ/mol.The bastnaesite in BMREC is decomposed into rare earth fluoride,rare earth oxides(La_(2)O_(3),Ce_(7)O_(12),Pr_(6)O_(11) and Nd_(2)O_(3)),and CO_(2),particularly,with the increase of roasting temperature,bastnaesite in BMREC is more completely decomposed into LaF_(3),which causes a decrease in leaching rate of La during the HCI leaching process.Additionally,the maximum cerium oxidation efficiency reaches about 60 wt% when the roasting temperature is equal to or above 500℃,and the oxidation reaction rate of cerium increases with the increasing roasting temperature.

关键词： Phase change Combination method Oxidation roasting Cerium oxidation efficiency Rare earths

New explicit and exact solutions of the Benney-Kawahara-Lin equation

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Chinese Physics B 2009年第10期18卷 4094-4099页

作者：谢元喜 Department of Physics and Electronic Information Hunan Institute of Science and Technology

In this paper, we present a Combination method of constructing the explicit and exact solutions of nonlinear partial differential equations. And as an illustrative example, we apply the method to the Benney-Kawahara-L... 详细信息

关键词： Combination method Benney-Kawahara-Lin equation explicit and exact solution

Linking individual-tree and whole-stand models for forest growth and yield prediction

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Forestry Studies in China 2014年第3期16卷 177-184页

作者： Quang V Cao School of Renewable Natural Resources Louisiana State University Agricultural Center

Background： Different types of growth and yield models provide essential information for making informed decisions on how to manage forests. Whole-stand models often provide well-behaved outputs at the stand level, but lack information on stand structures. Detailed information from individual-tree models and size-class models typically suffers from accumulation of errors. The disaggregation method, in assuming that predictions from a whole-stand model are reliable, partitions these outputs to individual trees. On the other hand, the Combination method seeks to improve stand-level predictions from both whole-stand and individual-tree models by combining them. methods： Data from 100 plots randomly selected from the Southwicte Seed Source Study of Ioblolly pine （Pinus taedo L） were used to evaluate the unadjusted individual-tree model against the disaggregation and Combination methods. Results： Compared to the whole-stand model, the Combination method did not show improvements in predicting stand attributes in this study. The Combination method also did not perform as well as the disaggregation method in tree-level predictions. The disaggregation method provided the best predictions of tree- and stand-level survival and growth. Conclusions： The disaggregation approach provides a link between individual-tree models and whole-stand models, and should be considered as a better alternative to the unadjusted tree model.

关键词： Disaggregation Combination method Loblollv pine Pinus taeda

Research and Implementation of Client-server Based E-mail Translator

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High Technology Letters 2001年第2期7卷 6-9页

作者：杨沐昀 Li Sheng Zhao Tiejun Dept. of Computer Science and Engineering Harbin Institute of Technology

The design and implementation of EATS, a machine translation system for e-mail, are presented. It first puts forward the notion of “instant machine translation service" and illustrates how it is provided through client-server mode in EATS. Then this paper gives a panoramic view of the realization of Chinese-English bi-directional translation module through multi-engine strategy. The prototype of the system has been successfully demonstrated in campus net in PPP mode, with 70%～80% translation accuracy.

关键词： Machine translation E-mail translator Client-server Combination method

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