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Search Results: 1 - 10 of 11526 matches for " Cao Jianwen "
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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.
Monotonic Vector Space Model(II): Application in System Capability Indicator Analysis and Design  [PDF]
Jianwen Hu
American Journal of Operations Research (AJOR) , 2014, DOI: 10.4236/ajor.2014.41005

The application of some MVS operations (each dimension of which corresponds to a capability indicator) in system capability analysis and design, including capability indicator requirement analysis, effectiveness analysis, sensibility analysis, fuzzy analysis, stability analysis, capability optimization design, etc., is discussed in the second paper of this series of papers. And some MVS-based models and algorithms for capability analysis and design are put forward. Finally, an example of capability analysis and optimization design is given for explaining the usages of related models and algorithms.

Monotonic Vector Space Model (Ⅰ): Concepts and Operations  [PDF]
Jianwen Hu
American Journal of Operations Research (AJOR) , 2014, DOI: 10.4236/ajor.2014.41004

Monotonic vector space (MVS), as a novel model in which there exist some monotonic mappings, is proposed. MVS model is an abstract of many practical problems (such as image processing, system capability engineering, etc.) and includes many useful important operations. This paper, as the first one of series papers, discusses the MVS framework, relative important concepts and important operations including partition, synthesis, screening, sampling, etc. And algorithms for these operations are the focus of this paper. The application of these operations in system capability engineering will be dealt with in the second part of this series of papers.

A Preliminary Study on the New Generation Employees’ Human Resource Management and Enterprise Sustained Competitive Advantage—From the Perspective of Resource-Based View  [PDF]
Jianwen Xiao
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.812158
Abstract: Recently, more and more people born in the 1980s and 1990s have stepped out of the ivory tower and entered the workplace. This group becomes more and more important in today’s workplace; they bring new energy to the society. However, due to the differences in their growing background, some of their characteristics are increasingly recognized by managers. Complaining, job-hopping, emphasizing ego and lack of sense of responsibility are marked on this young group, which have created obstacles for managers to carry out their works. Aiming at such a young group, the limitation of the traditional system management has already appeared. In this paper, by analyzing on characteristics of new generation employees, author proposes a new idea of human resource management for the new generation employees, which is from the perspective of resource based view, not only to help enterprises to obtain sustainable competitive advantage, but also to provide a new direction for the management of new generation employees.
A Driver Modeling Based on the Preview-Follower Theory and the Jerky Dynamics
Jianyong Cao,Hui Lu,Konghui Guo,Jianwen Zhang
Mathematical Problems in Engineering , 2013, DOI: 10.1155/2013/952106
Abstract: Based on the preview optimal simple artificial neural network driver model (POSANN), a new driver model, considering jerky dynamics and the tracing error between the real track and the planned path, is established. In this paper, the modeling for the driver-vehicle system is firstly described, and the relationship between weighting coefficients of driver model and system parameters is examined through test data. Secondly, the corresponding road test results are presented in order to verify the vehicle model and obtain the information on drive model and vehicle parameters. Finally, the simulations are carried out via CarSim. Simulation results indicate that the jerky dynamics need to be considered and the proposed new driver model can achieve a better path-following performance compared with the POSANN driver model. 1. Introduction Although the chassis control systems of a vehicle can improve vehicle dynamics performances, enhance active safety, and reduce driver load, they bring more challenges for the evaluation of vehicle performance, especially for the evaluation of handling and stability in terms of subjective sense [1, 2]. Previous studies [3, 4] reveal that the driver-vehicle-road closed-loop system works effectively when investigating the performances of vehicle handling and stability. In order to evaluate the handling quality of a vehicle and avoid potential risk in actual tests, the study on driver modeling is essential. This research field has drawn significant attention and several typical models have been carried out by many researchers in an early time. In 1953, Kondo [5] started with driver modeling in Japan. His research is based on the 2-wheel vehicle model on a straight line, running at a constant speed with side wind disturbances. In addition, McRuer and Jex [6] extended pilot models to road driver models by considering the factors of reaction time and inertial delay and a compensation driver model was presented. However, the preview characteristics of the driver were not taken into consideration in the studies. Macadam [7] established a driver model by using optimal preview closed-loop control in 1980. Moreover, the Preview-Follower theory [8] was proposed for the purpose of modeling the driver’s path-following behaviors. The driver’s behaviors were assumed based on the path-following theory in which the driver’s operation always aims at minimizing the errors between the desired and actual vehicle trajectory [9]. With the development of intelligence technology, several artificial neural network driver models were proposed in order to
The Global Attractor of Thermoelastic Coupled System  [PDF]
Danxia Wang, Jianwen Zhang
International Journal of Modern Nonlinear Theory and Application (IJMNTA) , 2012, DOI: 10.4236/ijmnta.2012.13015
Abstract: In this paper, we consider a class of Sine-Gordon equations which arise from the model of the thermoelastic coupled rod. Firstly, by virtue of the classical semigroup theory, we prove the existence and uniqueness of the mild solution under certain initial-boundary value for above-mentioned equations. Secondly, we obtain the boundedness of solutions by the priori estimates. Lastly, we prove the existence of a global attractor.
Boundary Stabilization of a More General Kirchhoff-Type Beam Equation  [PDF]
Jianwen Zhang, Danxia Wang
International Journal of Modern Nonlinear Theory and Application (IJMNTA) , 2012, DOI: 10.4236/ijmnta.2012.13014
Abstract: Simultaneously, considering the viscous effect of material, damping of medium, geometrical nonlinearity, physical nonlinearity, we set up a more general equation of beam subjected to axial force and external load. We prove the existence and uniqueness of global solutions under non-linear boundary conditions which the model is added one damping mechanism at l end. What is more, we also prove the exponential decay property of the energy of above mentioned system.
Global Attractor for a Non-Autonomous Beam Equation  [PDF]
Yonghua Ren, Jianwen Zhang
Advances in Pure Mathematics (APM) , 2012, DOI: 10.4236/apm.2012.25052
Abstract: This work studies the global attractor for the process generated by a non-autonomous beam equation utt+△2u+ηut-[β(t)+M(∫Ω|▽u(x,t)|2dx)] △u+g(u, t)=f (x,t) Based on a time-uniform priori estimate method, we first in the space H02(Ω) ×L2(Ω) establish a time-uniform priori estimate of the solution u to the equation, and conclude the existence of bounded absorbing set. When the external term f (x,t) is time-periodic, the continuous semigroup of solution is proved to possess a global attractor.
Research on Selection of Technological Innovation Mode for Large and Medium-Sized Construction Enterprises in China  [PDF]
Jianwen Wang, Yunbo Ye
Technology and Investment (TI) , 2017, DOI: 10.4236/ti.2017.82011
Abstract: Strengthening Technological Innovation is the Fundamental Way to Strengthen Core Competitiveness of Large and Medium Construction Enterprises in China and Realize Sustainable Development. The construction of a technological innovation model that conforms to the enterprise’s own conditions is an important premise to effectively integrate the internal and external innovation resources, reduce the cost and risk of innovation and improve the innovation performance. In this paper, the technology innovation model of large and medium-sized construction enterprises is divided into an independent innovation model, imitating innovation mode and cooperative innovation mode. Through the establishment of three-dimensional model, this paper aims to provide a quantitative analysis method for large and medium-sized construction enterprises in China.
Hydro-Geophysical Investigation of Contaminant Distribution at a Closed Landfill in Southwestern Ontario, Canada  [PDF]
Jianwen Yang, Siddharth Dilip Joshi
Journal of Geoscience and Environment Protection (GEP) , 2014, DOI: 10.4236/gep.2014.23002

This paper presents a hydro-geophysical investigation into the landfill leachate distribution and subsurface geology at a closed site in southwestern Ontario, Canada, using geophysical mapping and hydrological modeling approaches. Conductivity mapping was first conducted over the study site using a frequency-domain EM terrain conductivity meter, revealing an anomalous high-con- ductivity zone of about 200 m (S-N) × 80 m (W-E) at the western half of the site. The DC resistivity survey was then carried out at this anomalous zone with eight S-N profiles and three W-E profiles measuring 200m in length using a Wenner-α configuration. Our resistivity survey results indicate that the landfill leachate travels mainly south-east wards over the upper aquifer, with a minor vertical component into the upper weathered portion of the silt/sand aquitard at some locations. No contamination seems to exist in the lower sand aquifer. The geophysical results were later used to develop two conceptualized models for hydrological modeling. Our numerical results predict the leachate distribution at the study site in the future, confirming that the contaminant will occupy the entire upper aquifer and the most of the aquitard in a time of 1000 years, and that the barrier of the aquitard will protect the lower sand aquifer from the leachate pollution. These findings are critical in evaluating the current leachate conditions and the existing compliance monitoring plan for potential implementation at this study site and other sites in elsewhere.

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