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Search Results: 1 - 10 of 6029 matches for " Chi Xuebin "
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Parallel implementation of linear algebra problems on Dawning-1000
Parallel Implementation of Linear Algebra Problems on Dawning-1000

Chi Xuebin,
Chi
,Xuebin

计算机科学技术学报 , 1998,
Abstract: In this paper, some parallel algorithms are described for solving numerical linear algebra problems on Dawning-1000. They include matrix multiplication, LU factorization of a dense matrix, Cholesky factorization of a symmetric matrix, and eigendecomposition of symmetric matrix for real and complex data types. These programs are constructed based on fast BLAS library of Dawning-1000 under NX environment.Some comparison results under different parallel environments and implementing methods are also given for Cholesky factorization. The execution time, measured performance and speedup for each problem on Dawning-1000 are shown. For matrix multiplication and LU factorization, 1.86GFLOPS and 1.53GFLOPS are reached.
The research progress of tiling array technology and applications
XianYu Lang,Jun Wang,XueBin Chi
Chinese Science Bulletin , 2008, DOI: 10.1007/s11434-008-0155-2
Abstract: Tiling array technology was improved from microarray technology. Over the past five years, tiling array has become an important tool for gathering genome information. Its features of high density and high throughput allow people to probe into life from the whole-genome level. This paper is a survey of tiling array technology and its applications. In addition, some typical algorithms for identifying expressed probe signals are described and compared.
The research progress of tiling array technology and applications
LANG XianYu,WANG Jun,CHI XueBin,

科学通报(英文版) , 2008,
Abstract: Tiling array technology was improved from microarray technology. Over the past five years, tiling array has become an important tool for gathering genome information. Its features of high density and high throughput allow people to probe into life from the whole-genome level. This paper is a survey of tiling array technology and its applications. In addition, some typical algorithms for identifying expressed probe signals are described and compared.
Parallel Algorithm Design on Some Distributed Systems
Sun Jiachang,Chi Xuebin,Cao Jianwen,
Sun Jiachang
,Chi Xuebin,Cao Jianwen,Zhang Linbo

计算机科学技术学报 , 1997,
Abstract: Some testing results on DAWNING-1000, Paragon and workstation cluster are described in this paper. On the home-made parallel system DAWNING-1000 with 32 computational processors, the practical performance of 1.117 Gflops and 1.58 Gflops has been measured in solving a dense linear system and doing matrix multiplication, respectively. The scalability is also investigated. The importance of designing efficient parallel algorithms for evaluating parallel systems is emphasized.
MATRIX MULTIPLICATION ON DISTRIBUTED SYSTEM
分布式系统上并行矩阵乘法

Wu Jianping,Chi Xuebin,
吴建平
,迟学斌

计算数学 , 1999,
Abstract: By begiwhng with the Cannon algorithm1] and the double- direct ion dat amoving algoritlun2] for processors arranged as a 2-D square mesh, we improvethese two algorithms to general 2-D mesh in this paper. We also consider theapplication of our algorithms in those operations which are similar to matrix multiplication. Using MPI parallel programming environment, we have obtained satisfactory performance on Dawning-1000.
Interactive Visual Exploration of Halos in Large Scale Cosmology Simulation
Guihua Shan,Maojin Xie,FengAn Li,Yang Gao,Xuebin Chi
Computer Science , 2014, DOI: 10.1007/s12650-014-0206-5
Abstract: Halo is one of the most important basic elements in cosmology simulation, which merges from small clumps to ever larger objects. The processes of the birth and merging of the halos play a fundamental role in studying the evolution of large scale cosmological structures. In this paper, a visual analysis system is developed to interactively identify and explore the evolution histories of thousands of halos. In this system, an intelligent structure-aware selection method in What You See Is What You Get manner is designed to efficiently define the interesting region in 3D space with 2D hand-drawn lasso input. Then the exact information of halos within this 3D region is identified by data mining in the merger tree files. To avoid visual clutter, all the halos are projected in 2D space with a MDS method. Through the linked view of 3D View and 2D graph, Users can interactively explore these halos, including the tracing path and evolution history tree.
Yttria Promoted Nickel Nanowire Catalyst for the Partial Oxidation of Methane to Synthesis Gas  [PDF]
Xuebin Hong, Bingbing Li, Cong Zhang
Advances in Materials Physics and Chemistry (AMPC) , 2012, DOI: 10.4236/ampc.2012.24B054
Abstract: A yttria promoted nickel nanowire catalyst was prepared by a hard templating method, and characterized by transmission electron microscopy (TEM) and N2 physical adsorption. The catalytic properties of the yttria promoted nanowire catalyst in the partial oxidation of methane to syngas were compared with a metallic Ni catalyst which was prepared with nickel sponge. The characterization results showed that the yttria promoted nickel nanowire catalyst had high specific surface area and there was more NiO phase in the nickel nanowire catalyst than in the metallic Ni catalyst. The reaction results showed that the yttria promoted nickel nanowire catalyst had high CH4 conversion and selectivities to H2 and CO.
A Method for Measuring the Degree of Fermentation of the Edible Mushroom Cultivation Substrate  [PDF]
Jinping Zhang, Xuebin Li, Yue Yin
Natural Resources (NR) , 2018, DOI: 10.4236/nr.2018.911022
Abstract: In the study, eight treated substrates were designed to explore the possibility to determine the degree of fermentation of the substrate by the mycelial growth rate, whose main raw material includes?composted pine sawdust, oil tea shell and hickory shell respectively, and auxiliary materials contain rice bran, soybean powder, etc. The result showed that the shiitake mushroom grew well in 7 treatments whose mycelial growth rate could be measured on 3rd?days when the mycelial growth rates of P1, C1 and H1 were 5.0 mm/d, 9.66 m/s, 13.33m/s.?Auricularia cornea?var.Li exhibited the fastest growth on P1 substrate. And mycelial growth rates of P1, P0 and CK1 were 5.8 mm/d,?3.66mm/d,?and?4.66 mm/d on 3rd?day, respectively. The growth rates?of?Pleurotusgeesteranus?of C1, CK2 and P0 were 9.0 mm/d,11.66 mm/d,?and?4.00 mm/d on 3rd?day, respectively. So the degree of fermentation of the substrate could be determined within
Bulk flow of halos in ΛCDM simulation
Ming Li,Jun Pan,Liang Gao,Yipeng Jing,Xiaohu Yang,Xuebin Chi,Longlong Feng,Xi Kang,Weipeng Lin,Guihua Shan,Long Wang,Donghai Zhao,Pengjie Zhang
Physics , 2012, DOI: 10.1088/0004-637X/761/2/151
Abstract: Analysis of the Pangu N-body simulation validates that the bulk flow of halos follows a Maxwellian distribution which variance is consistent with the prediction of the linear theory of structure formation. We propose that the consistency between the observed bulk velocity and theories should be examined at the effective scale of the radius of a spherical top-hat window function yielding the same smoothed velocity variance in linear theory as the sample window function does. We compared some recently estimated bulk flows from observational samples with the prediction of the \Lambda CDM model we used; some results deviate from expectation at a level of ~ 3\sigma but the discrepancy is not as severe as previously claimed. We show that bulk flow is only weakly correlated with the dipole of the internal mass distribution, the alignment angle between the mass dipole and the bulk flow has a broad distribution peaked at ~ 30-50 deg., and also that the bulk flow shows little dependence on the mass of the halos used in the estimation. In a simulation of box size 1Gpc/h, for a cell of radius 100 Mpc/h the maximal bulk velocity is >500 km/s, dipoles of the environmental mass outside the cell are not tightly aligned with the bulk flow, but are rather located randomly around it with separation angles ~ 20-40 deg. In the fastest cell there is a slightly smaller number of low-mass halos; however halos inside are clustered more strongly at scales > ~ 20 Mpc/h, which might be a significant feature since the correlation between bulk flow and halo clustering actually increases in significance beyond such scales.
Novel agents for anti-platelet therapy
Xuebin Ji, Ming Hou
Journal of Hematology & Oncology , 2011, DOI: 10.1186/1756-8722-4-44
Abstract: Thrombotic diseases and their complications may have severe consequences. Platelets play a key role in thrombosis, and anti-platelet therapies may prevent as well as treat thrombotic diseases. Therefore, anti-platelet drugs that can inhibit platelet adhesion, aggregation, release, and activation need to be developed (Figure 1). The most commonly used anti-platelet drugs, namely, aspirin, clopidogrel, and ticlopidine are effective in preventing thrombotic diseases. With the developments in medicine and pharmacy, the number of anti-platelet agents is continuously increasing.The adhesion, aggregation, release, and activation of platelets can induce platelet thrombosis, which is important in physiological hemostasis and pathological thrombosis. Once platelets are activated, GP IIb/IIIa receptors on the surfaces of platelets transform into their active states, which can combine with fibrinogen and the von Willebrand factor (vWF). The GP IIb/IIIa receptor operates in the final common pathway of platelet aggregation. Blocking the GP IIb/IIIa receptor can inhibit platelet aggregation induced by activating factors. Once platelet aggregation is inhibited, platelet thrombi cannot form.The development of GP IIb/IIIa antagonists, such as the recently approved abciximab, eptifibatide, and tirofiban, is pivotal in anti-platelet therapy. Pharmacodynamic studies on these three agents have revealed their capabilities of establishing and maintaining a > 80% inhibition of platelet aggregation [1].The first GP IIb/IIIa receptor antagonist used in clinical settings is abciximab. This drug is the fragment of recombinant human-mouse chimeric monoclonal antibody, which can inhibit GP IIb/IIIa receptors in a dose-dependent manner. Abciximab also inhibits αIIb/β3 receptors (for vWF) on platelets, thereby inhibiting platelet aggregation via fibrinogen. However, abciximab have the disadvantages of potential immunogenicity, drug effect irreversibility, and high cost [2]. Hence, micromolecular GP
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