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Semi-Supervised Classification of Data Streams by BIRCH Ensemble and Local Structure Mapping

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Journal of Computer Science & Technology 2020年第2期35卷 295-304页

作者： yi-Min wen Shuai Liu Guangxi Key Laboratory of Image and Graphic Intelligent Processing Guilin University of Electronic Technology Guilin 541004China Guangxi Key Laboratory of Trusted Software Guilin University of Electronic TechnologyGuilin 541004China School of Computer Science and Information Security Guilin University of Electronic TechnologyGuilin 541004China

Many researchers have applied clustering to handle semi-supervised classification of data streams with concept ***,the generalization ability for each specific concept cannot be steadily improved,and the concept drift detection method without considering the local structural information of data cannot accurately detect concept *** paper proposes to solve these problems by BIRCH(Balanced Iterative Reducing and Clustering Using Hierarchies)ensemble and local structure *** local structure mapping strategy is utilized to compute local similarity around each sample and combined with semi-supervised Bayesian method to perform concept *** a recurrent concept is detected,a historical BIRCH ensemble classifier is selected to be incrementally updated;otherwise a new BIRCH ensemble classifier is constructed and added into the classifier *** extensive experiments on several synthetic and real datasets demonstrate the advantage of the proposed algorithm.

关键词： semi-supervised classification clustering data stream concept drift

A Simple Proof of Dieudonn-Manin Classification Theorem

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Acta Mathematica Sinica,English Series 2012年第8期28卷 1553-1574页

作者： yi wen DING yi OUYANG Wu wen-Tsun Key Laboratory of Mathematics University of Science and Techonology of ChinaChinese Academy of SciencesHefei 230026P.R.China School of Mathematics University of Science and Technology of ChinaHefei 230026P.R.China

The Dieudonne Manin classification theorem on φ-modules （φ-isocrystals） over a perfect field plays a very important role in p-adic Hodge theory. In this note, in a more general setting we give a new proof of this result, and in the course of the proof, we also give an explicit construction of the Harder Narasimhan filtration of a φ-module.

关键词： φ-Module strict ring Dieudonne Manin theorem Harder-Narasimhan filtration

Quantum Non-thermal Effect From Kerr-Newman Black Hole

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Communications in Theoretical Physics 2009年第3期51卷 450-452页

作者： HAN yi-wen College of Computer Science Chongqing Technology and Business University Chongqing 400067 China

We present a short and direct derivation of Hawking radiation by using the Damour-Ruffini method, as taking into account the self-gravitational interaction from the Kerr-Newman black hole, It is found that the radiation is not exactly thermal, and because the derivation obey conservation laws, the non-thermal Hawking radiation can carry information from the black hole. So it can be used to explain the black hole information paradox, and the process satisfies unitary.

关键词： black hole Hawking radiation Damour Ruffini method quantum theory

Unconditionally stable Crank-Nicolson algorithm with enhanced absorption for rotationally symmetric multi-scale problems in anisotropic magnetized plasma

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Journal of Systems Engineering and Electronics 2024年第1期35卷 65-73页

作者： wen yi WANG Junxiang XU Hongbing School of Automatic Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Beijing Institute of Aerospace Systems Engineering Beijing 100076China

Large calculation error can be formed by directly employing the conventional Yee’s grid to curve *** order to alleviate such condition,unconditionally stable CrankNicolson Douglas-Gunn(CNDG)algorithm with is proposed for rotationally symmetric multi-scale problems in anisotropic magnetized *** the CNDG algorithm,an alternative scheme for the simulation of anisotropic plasma is proposed in body-of-revolution *** perfectly matched layer(CPML)formulation is proposed to efficiently solve the open region *** example is carried out for the illustration of effectiveness including the efficiency,resources,and *** the results,it can be concluded that the proposed scheme shows considerable performance during the simulation.

关键词： anisotropic magnetized plasma body-of-revolution(BOR) Crank-Nicolson Douglas-Gunn(CNDG) finite-difference time-domain(FDTD) perfectly matched layer(PML) rotationally symmetric multi-scale problems

Microstructures and mechanical properties of low carbon fishplate materials

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Acta Metallurgica Sinica(English Letters) 2010年第3期23卷 176-184页

作者： Fumin XU Kai wen yi TAN School of Materials Science and Engineering Dalian University of Technology Dalian 116024 China

Two kinds of low carbon bainite materials were developed for fishplate *** microstructures and mechanical properties were measured in *** results showed that one material was composed of fine granular bainite with the yield strength of 722 MPa at room temperature and 738 MPa at-55℃, and elongation percentages of 60.7% and 41.7%, *** other one had a meta-bainite microstructure with corresponding strengths of 568.5 MPa and 700 MPa, elongation percentages of 63.5% and 67.1%, *** values are all superior to the home-made B7 steel and the fishplate materials made in *** major strengthening mechanisms were discussed and attributed to the solid solution, complex phases, fine grain and dislocation strengthening.

关键词： Fishplate Microstructure Mechanical property Strengthening

Astrocyte polarization in glaucoma: a new opportunity

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Neural Regeneration Research 2022年第12期17卷 2582-2588页

作者： yi-Xin Liu Hao Sun wen-yi Guo Department of Ophthalmology Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology ShanghaiChina

Astrocyte polarization is a new concept which is similar to microglia polarization and in which astrocytes are classified as A1(neurotoxic)and A2(neuroprotective).Several studies on astrocyte polarization have focused mainly on neurodegenerative diseases,trauma,and ***,the role of astrocyte polarization in glaucoma,a neurodegenerative disease,has not been fully *** this review,we first describe the characteristics of astrocyte astrogliosis in glaucoma,including morphological,molecular,proliferative and functional *** then summarize understanding of astrocyte polarization in other diseases,and show that A1 astrocytes are involved in the death of retinal ganglion cells in glaucoma,and that their neurotoxins kill only damaged retinal ganglion *** on this,we propose new interesting conjecture on astrocyte polarization in glaucoma:(1)That the neurotoxin from A1 astrocytes is a product of the complement system(membrane-attacking complex),since this system is known to mediate synaptic elimination and the C3 expression is clearly increased in A1 astrocytes;(2)that reactive scar-forming astrocytes in the optic nerve head may be classified as A2 astrocytes since their ablation leads to a worse prognosis in ***,current therapeutic research progress on astrocyte polarization in other diseases is also *** of astrocyte polarization can be achieved by extracellular microglia-related and intracellular *** A1 or increased A2 astrocytes can rescue the *** example,glucagon-like peptide-1 receptor agonist rescues retinal ganglion cells by reducing A1 astrocytes via the extracellular microglia-related pathway in an ocular hypertension model,suggesting that regulation of astrocyte polarization as a therapeutic target in glaucoma is feasible.

关键词： astrocytes glaucoma heterogeneity microglia neurodegenerative disease neuroinflammation neuroprotection optic nerve retina therapy

Convex Mappings on Some Reinhardt Domains

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Acta Mathematica Sinica,English Series 2008年第12期24卷 2021-2028页

作者： yi HONG wen Ge CHEN School of Mathematical Sciences South China University of Technology Guangzhou 510640 P. R. China

In this paper, we consider the following Reinhardt domains. Let M = （M1, M2,..., Mn）： [0,1] → [0,1]^n be a C2-function and Mj（0） = 0, Mj（1） = 1, Mj″ 〉 0, C1jr^pj-1 〈 Mj′（r）〈 C2jr^pj-1, r∈ （0, 1）, pj 〉 2, 1 ≤ j ≤ n, 0 〈 C1j 〈 C2j be constants. Define DM={z=（z1,z2,…,Zn）^T∈C^n：n∑j=1 Mj（｜zj｜）〈1}Then DM C^n is a convex Reinhardt domain. We give an extension theorem for a normalized biholomorphic convex mapping f ： DM -→ C^n.

关键词： Reinhardt domain biholomorphic convex mapping Minkowski functional Schwarz lemma

Eigenvalues of the Manifold Sp（n）/U（n）

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Acta Mathematica Sinica,English Series 2011年第11期27卷 2269-2274页

作者： yi HONG wen Ge CHEN Department of Mathematics South China University of Technology Guangzhou 510640 P. R. China

In this paper, we give the eigenvalues of the manifold Sp（n）/U（n）. We prove that an eigenvalue λs（f1,f2,...,fn） of the Lie group Sp（n）, corresponding to the representation with label （f1, f2,..., fn）, is an... 详细信息

关键词： Manifold eigenvalues group representation theory

Is playing-as-downloading feasible in an eMule P2P file sharing system?

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第6期11卷 465-475页

作者： wen-yi WANG Yao-wu CHEN Advanced Digital Technology and lnstruments Institute Zhejiang University Hangzhou 310027 China

Peer-to-peer(P2P) swarm technologies have been shown to be very efficient for large scale content distribution systems, such as the well-known BitTorrent and eMule ***, these systems have been designed for generic file sharing with little consideration of media streaming support, and the user cannot start a movie playback before it is completely *** playing-as-downloading capability would be particularly useful for a downloading peer to evaluate if a movie is valuable to be downloaded, and it could also help the P2P content distribution system to locate and eliminate the polluted *** this paper we address this issue by introducing a new algorithm, wish driven chunk distribution(WDCD), which enables the P2P file sharing system to support the video-on-demand(VOD) function while keeping the P2P native downloading speed.A new parameter named next-play-frequency is added to the content chunk to strike a replication balance between downloading and streaming *** modify the eMule as the test bed by adding the WDCD algorithm and then verify the prototype implementation by *** experimental results show that the proposed algorithm can keep the high downloading throughput performance of the eMule system with a good playing-as-downloading function.

关键词： Peer-to-peer(P2P) Video-on-demand(VOD) Playing-as-downloading eMule