OALib Journal期刊

ISSN: 2333-9721




2018 ( 61 )

2017 ( 53 )

2016 ( 73 )

2015 ( 1150 )


匹配条件: “DI Rui-hua” ,找到相关结果约42494条。
Performance Analysis and Tuning of Large-scale Finite Element Analysis Program on Multi-core Cluster Platform

LV Hai,DI Rui-hua,GONG Hua,

计算机科学 , 2012,
Abstract: Through the performance analysis of an open source finite clement software based on MPI program model on multi core cluster platform, some performance bottlenecks were founded. Based on the performance bottleneck analysis,two optimization plans based on MPI/OpenMP hybrid parallel program model were proposed, one of them resolves the inefficiency in solving linear or nonlinear system equations, and the other one elevates processes communication performance. Experiment results show that hybrid parallel solver can efficiently promote the pure MPI based parallel program performance, as up to 3 times. I}he multi-thread multi-process communication plan can do some optimization, but is not the best solution in this case. The overall optimized performance analysis indicates that on multi-core cluster computing platform, MPI/OpenMP parallel program model can more efficiently utilize hardware system computation resource.
Research and Implementation of Trade Map Creation Software with Parallel Processing Solution

SHAO Fei,DI Rui-Hua,

计算机科学 , 2008,
Abstract: By way of analyzing the key character of the Trade Map Creating Software in this paper,a series of performance bottlenecks of it are located and studied when running,and put the parallel processing solution based on parametric sweep which is fittest for the system into practice on the cluster.It has been concluded that the proper solution can make the time of creating Trade Map shorter and the performance of the system better.
Research on Application-driven Parallel Program Performance Tuning

DI Rui-hua,JIANG Hai-hua,LV Hai,
,蒋海华,吕 海

计算机科学 , 2013,
Abstract: Multi-core processor provides multiple threads parallel execution capability, and makes applications to have huge potential for performance improvement, but makes it enormously challenge to efficiently develop high-performance program Meanwhile, through the old process of performance optimization, the scalability is difficult to be guarantee.From application point of view,attributing core calculation to patterns and motifs,and optimizing these motifs can produce reusable library that can support efficient develop new application,and also can guarantee the scalability of the application performance. A layered parallel computing model was used for guidance in this article. From the perspective of application-driven parallel program performance optimization, this article designed a new parallel multi-core processor computing modcl,which can be used in the architecture of multi core processor chip. Based on this model,g-scan algorithm was designed which has good extendibility together with high performance after analyzing and optimizing some fundamental parallel algorithms. At the last, newly designed parallel algorithm was applied to OpenSeesSP which is a finite element software widely used in structure engineering.
Tailorable acceptor ${\rm C}_{60-n}{\rm B}_{n}$ and donor ${\rm C}_{60-m}{\rm N}_{m}$ pairs for molecular electronics
Rui-Hua Xie,Garnett W. Bryant,Jijun Zhao,Vedene H. Smith Jr,Aldo Di Carlo,Alessandro Pecchia
Physics , 2003, DOI: 10.1103/PhysRevLett.90.206602
Abstract: Our first-principles calculations demonstrate that ${\rm C}_{60-n}{\rm B}_{n}$ and ${\rm C}_{60-m}{\rm N}_{m}$ molecules can be engineered as the acceptors and donors, respectively, which are needed for molecular electronics, by properly controlling the number $n$ and $m$ of the substitutional dopants in ${\rm C}_{60}$. As an example, we show that acceptor ${\rm C}_{48}{\rm B}_{12}$ and donor ${\rm C}_{48}{\rm N}_{12}$ are promising components for molecular rectifiers, carbon nanotube-based $p$-type, $n$-type, $n$-$p$-$n$ and $p$-$n$-$p$ transistors and $p$-$n$ junctions.
Design and Implementation of Ontology Model Framework in Structural Engineering Semantic Grid

WANG Li,WENG Zi-jun,SU Lin,DI Rui-hua,

计算机科学 , 2009,
Abstract: Concerned with the semantic conflicts during information integration and share in structural engineering,based on the related technique criterions of grid computing and semantic Web,this paper proposed the architecture of structural engineering semantic grid,on this basis,the paper focused on analyzing the semantics conflict from instance integration,schema integration,concept integration to query processing during the course of building semantics layer of Structure engineering semantics grid,furthermore,th...
Constructing the Training Curriculum of Standardized Patients for OSCE Examination for Undergraduate Nursing Students in Shanxi Medical University  [PDF]
Jie Zheng, Yuejuan Jing, Shujuan Wang, Rui-Hua Jin, Yuzhen Gao
Open Journal of Nursing (OJN) , 2014, DOI: 10.4236/ojn.2014.43017
Abstract: Objective: The objective of this study is to construct the simulated patient training curriculum for OSCE examination for undergraduate nursing students and to explore the theoretical and practical foundation. Methods: To establish TSP training curriculum and SSP training curriculum, 30 experts were invited to finish the questionnaires which were proved by Delphi Method. Findings: We established the training curriculum of TSP and SSP, and set the weight of various curricula and teaching contents. Conclusions: The experts considered that the degree and importance of these two training curricula were comparable. This conclusion lays the foundation for applying these curricula to teaching practice and clinical practice, and enhancing the teaching outcome of undergraduate nursing students. Implications: This study provided a new way of assessing the clinic ability of nursing students.
Stochastic Resonance in Time-delayed Bistable Systems Driven by Weak Periodic Signal
Rui-Hua Shao,Yong Chen
Physics , 2008, DOI: 10.1016/j.physa.2008.12.001
Abstract: We study theoretically a bistable systems with time-delayed feedback driven by weak periodic force. The effective potential function and the steady-state probability density are derived. The delay time and the strength of its feedback can change the shapes of the potential wells. In the adiabatic approximation, the signal-to-noise ratio (SNR) of the system with a weak periodic force is obtained. The time-delayed feedback modulates the magnitude of SNR by changing the shape of the potential and the effective strength of signal. The maximum of SNR decreases with increasing the feedback intensity $\epsilon$. When $\epsilon$ is negative (or positive), the time delay can suppress (or promote) the stochastic resonance phenomenon.
Generation of dipole squeezing in a two-mode system with entangled coherent states of a quantized electromagnetic field
Rui-Hua Xie,Qin Rao
Physics , 2003,
Abstract: Two-mode quantized electromagnetic fields can be entangled and admit a large number of coherent states. In this paper, we consider a two-mode system that consists of a two-level atom interacting with a two-mode quantized electromagnetic field, which is initially prepared in an entangled two-mode coherent state, via a nondegenerate two-photon process in a lossless cavity. We study the quantum fluctuations in the two-mode system and investigate in detail the effects of detuning, Stark shift and atomic coherence on atomic dipole squeezing (ADS). We show that ADS strongly depends on the atomic coherence. It is found that the stronger the correlations between the two modes are involved, the more the ADS could be generated. The detuning or Stark shift has a destructive effect on ADS, but the combined effect of the detuning and Stark shift may lead to a regular, periodical and strong ADS pattern.
Generation of higher-order atomic dipole squeezing in a high-Q micromaser cavity: VIII. multi-photon interaction
Rui-Hua Xie,Qin Rao
Physics , 2003, DOI: 10.1016/S0378-4371(02)01519-4
Abstract: In our preceding serial works, we have investigated the generation of higher-order atomic dipole squeezing (HOADS) in a high-Q micromaser cavity, discussing the effects of dynamic Stark shift, atomic damping, atomic coherence and nonlinear one-photon processes and different initial states (for example, correlated and uncorrelated states, superposition states, squeezed vacuum). In this paper, we continue to study HOADS in a high-Q micromaser cavity, but consider that the atom interacts with the optical field via a multi-photon transition process and that the initial atom is arbitrarily prepared. For a vacuum initial field, we demonstrate that HOADS cannot occur if the atom is initially prepared in a chaotic state and that a coherent atomic state generates less efficient and stable HOADS than an arbitrary one. It is found that large detuning may lead to enhanced and strong HOADS.
A Simple Three-Parameter Model Potential For Diatomic Systems: From Weakly and Strongly Bound Molecules to Metastable Molecular Ions
Rui-Hua Xie,Jiangbin Gong
Physics , 2005, DOI: 10.1103/PhysRevLett.95.263202
Abstract: Based on a simplest molecular orbital theory of H$_{2}^{+}$, a three-parameter model potential function is proposed to describe ground-state diatomic systems with closed-shell and/or S-type valence-shell constituents over a significantly wide range of internuclear distances. More than 200 weakly and strongly bound diatomics have been studied, including neutral and singly-charged diatomics (e.g., H$_{2}$, Li$_{2}$, LiH, Cd$_{2}$, Na$_{2}^{+}$, and RbH$^{-}$), long-range bound diatomics (e.g., NaAr, CdNe, He$_{2}$, CaHe, SrHe, and BaHe), metastable molecular dications (e.g., BeH$^{++}$, AlH$^{++}$, Mg$_{2}^{++}$, and LiBa$^{++}$), and molecular trications (e.g., YHe$^{+++}$ and ScHe$^{+++}$).

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