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Molecular Simulation on Transport Properties of Confined Water 认领 引用 被引量：1
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作者 YingChunLIU GuoZhenXIAO QiWANG 《Chinese Chemical Letters》 SCIE CAS 2004年第7期879-882,共4页
The diffusivity and viscosity of water confined in micropores were studied by molecular dynamics simulations. The effects of pore width and density were analyzed at pore widths from 0.9 to 2.6 nm. The diffusivity in m... The diffusivity and viscosity of water confined in micropores were studied by molecular dynamics simulations. The effects of pore width and density were analyzed at pore widths from 0.9 to 2.6 nm. The diffusivity in micropores is lower than that of the bulk, and it decreases as pore width decreases and as density increases. But the viscosity in micropores is much larger than that of the bulk, and it increases as pore width decreases and as density increases. The diffusivity in channel parallel direction is obviously larger than that in channel perpendicular directions. 展开更多
关键词 Micropore transport property molecular dynamics simulation.
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Solving geometric constraints with genetic simulated annealing algorithm 认领 引用 被引量：3
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作者 刘生礼 唐敏 董金祥 《Journal of Zhejiang University Science》 2003年第5期532-541,共10页
This paper applies genetic simulated annealing algorithm (SAGA) to solving geometric constraint problems. This method makes full use of the advantages of SAGA and can handle under-/over- constraint problems naturally.... This paper applies genetic simulated annealing algorithm (SAGA) to solving geometric constraint problems. This method makes full use of the advantages of SAGA and can handle under-/over- constraint problems naturally. It has advantages (due to its not being sensitive to the initial values) over the Newton-Raphson method, and its yielding of multiple solutions, is an advantage over other optimal methods for multi-solution constraint system. Our experiments have proved the robustness and efficiency of this method. 展开更多
关键词 SAGA Geometric constraint solving Variational desig n
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LoColms: an innovative approach of enhancing traditional classroom form of education by promoting web-based distance learning in the poorer countries 认领 引用
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作者 NGARAMBEDonart 潘云鹤 陈德人 《Journal of Zhejiang University Science》 2003年第6期630-636,共7页
There have been numerous attempts recently to promote technology based education (Shrestha, 1997) in the poorer third world countries, but so far all these have not provided a sustainable solution as they are either c... There have been numerous attempts recently to promote technology based education (Shrestha, 1997) in the poorer third world countries, but so far all these have not provided a sustainable solution as they are either centered and controlled from abroad and relying solely on foreign donors for their sustenance or they are not web-based, which make distribution problematic, and some are not affordable by most of the local population in these places. In this paper we discuss an application, the Local College Learning Management System (LoColms) , which we are developing, that is both sustainable and economical to suit the situation inthese countries. The application is a web-based system, and aims at improving the traditional form of education by empowering the local universities. Its economicability comes from the fact that it is supported by traditional communication technology, the public switching telephone network system, PSTN, which eliminates the need for packet switched or dedicated private virtual networks (PVN) usually required in similar situations. At a later stage, we shall incorporate ontology and paging tools to improve resource sharability and storage optimization in the Proxy Caches (ProCa) and LoColms servers. The system is based on the client/server paradigm and its infrastructure consists of the PSTN, ProCa, with the learning centers accessing the universities by means of point-to-point protocol (PPP) . 展开更多
关键词 LoColms Web-based distance learning Ontology Paging PSTN Proxy caches PPP
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SeeDNA: A Visualization Tool for K-string Content of Long DNA Sequences and Their Randomized Counterparts 认领 引用 被引量：4
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作者 JunjieShen ShuyuZhang +1 位作者 Hoong-ChienLee BailinHao 《Genomics, Proteomics & Bioinformatics》 CAS 2004年第3期192-196,共5页
Fudan University, Shanghai 200433, China; Department of Physics, National Central University, Chungli, 3 Taiwan 320, China; Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China. 4 An in... Fudan University, Shanghai 200433, China; Department of Physics, National Central University, Chungli, 3 Taiwan 320, China; Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China. 4 An interactive tool to visualize the K-string composition of long DNA sequences including bacterial complete genomes is described. It is especially useful for ex- ploring short palindromic structures in the sequences. The SeeDNA program runs on Red Hat Linux with GTK+ support. It displays two-dimensional (2D) or one-dimensional (1D) histograms of the K-string distribution of a given sequence and/or its randomized counterpart. It is also capable of showing the di?erence of K-string distributions between two sequences. The C source code using the GTK+ package is freely available. 展开更多
关键词 K-tuple visualization palindrome randomized sequence
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