检索结果-南通市图书馆

International Journal of Modeling, Simulation, and Scientific Computing 2019年第1期10卷 23-43页

作者： kuo chi Jianshe Kang Xinghui Zhang Fei Zhao Army Engineering University of PLA Shijiazhuang 050000P.R.China Mechanical Engineering College Shijiazhuang 050003P.R.China Northeastern University Shenyang 110819P.R.China

Bearing is among the most widely used components in rotating *** failure can cause serious economic losses or even ***,the fault-induced impulses are weak especially for the early *** to the bearing fault diagnosis,a novel bearing diagnosis method based on scale-varying fractional-order stochastic resonance(SFrSR)is ***-to-noise ratio of the SFrSR output is regarded as the criterion for evaluating the stochastic resonance(SR)*** the proposed method,by selecting the proper parameters(integration step H,amplitude gain K and fractional-orderα)of SFrSR,the weak fault-induced impulses,the noise and the potential can be matched with each *** optimal fractional-order dynamic system can be *** verify the proposed SFrSR,numerical tests and application verification are conducted in comparison with the traditional scale-varying first-order SR(SFiSR).The results prove that the parameters H,K andαaffect the SFrSR effect seriously and the proposed SFrSR can enhance the weak signal while suppressing the *** SFrSR is more effective for bearing fault diagnosis than SFiSR.

关键词： Fault diagnosis rolling element bearing stochastic resonance fractional dynamical system

A STUDY ON FACTORS FOR RETAILERS IMPLEMENTING CPFR-A FUZZY AHP ANALYSIS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2010年第2期19卷 192-209页

作者： Hsin-Pin FU kuo-Kuang CHU Sheng-Wei LIN chi-Ren CHEN Department of Marketing and Distribution Management National Kaohsiung First University of Science and Technology Kaohsiung (811) Taiwan China Department of Tourism management Shih Chien University Kaohsiung campus (845) Taiwan China Department of Marketing and Logistics Management Far East University Tainan County (744) Taiwan China

Since collaborative, planning, forecasting, and replenishment （CPFR） was first proposed in 1998, numerous studies have focused on exploring its implementation in retailing contexts. While a considerable body of research has emphasized reduced costs, increased sales and improved forecasting ability, there has been a lack of research on the importance of each of the various factors which affect such implementations. In order to find out the critical success factors affecting CPFR implementation, this paper first collected related influence factors regarding adopting CPFR or business to business （B2B） information systems, and further constructed a factor table with a three-layer hierarchical structure. A pair wise analytic hierarchy process （AHP） questionnaire was designed and distributed to experts who were familiar with implementing CPFR in the retailing industry. After questionnaires were returned, we found out the weights of each impact factor by using a fuzzy analytic hierarchy process （fuzzy AHP） approach. The importance of each critical impact factor was investigated, and the paths of the critical success factors were also analyzed. The results of this study can provide more precise information with regard to allocating optimal resources for retailers implementing CPFR.

关键词： Collaborative planning forecasting and replenishment (CPFR) critical influence factors fuzzy analytic hierarchy process (fuzzy AHP)

Study of neural network disturbance learning and application in RoboCup

在线全文

学校读者我要写书评

暂无评论

High Technology Letters 2007年第2期13卷 203-206页

作者：彭军 Wu Ming Guo Rui kuo-chi Lin School of Information Science and Engineering Central South University Changsha 410075 P.R.China Institute for Simulation and Training University of Central Florida Orlando FL32826 U.S.A.

To solve the problem of convergence to a local optimum in the multi-layer feedforward neural net-work, a new disturbance gradient algorithm is proposed. Through introducing random disturbance into the training process, the algorithm can avoid being trapped into the local optimum. The random disturbance obeys the Boltzmann distribution. The convergence of the algorithm to the global optimum is statistically guaranteed. The application of the algorithm in RoboCup, which is a complex multi-agent system, is dis-cussed. Experiment results illustrate the learning efficiency and generalization ability of the proposed al-gorithm.

关键词： machine learning neural networks RoboCup

Estimating the change of porosity in the saturated zone during air sparging

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2006年第4期18卷 675-679页

作者： Yih-jin Tsai Yu-chia kuo Tsu-chi Chen Feng-chih Chou Department of Environment and Resources Engineering Diwan College of Managemen t No. 87-1 Nansh Li Madou Tainan Taiwan China

Air sparging is a remedial method for groundwater. The remedial region is similar to the air flow region in the saturated zone. If soil particles are transported during air sparging, the porosity distributions in the saturated zone change, which may alter the flow path of the air. To understand better the particle movement, this study performed a sandbox test to estimate the soil porosity change during air sparging. A clear fracture was formed and the phenomenon of particle movement was observed when the air injection was started. The moved sand filled the porous around the fracture and the reparked sand filled the fracture, reducing the porosity around the fracture. The results obtained from the photographs of the sandbox, the current measurements and the direct sand sample measurements were close to each other and are credible. Therefore, air injection during air sparging causes sand particle movement of sand, altering the characteristic of the sand matrix and the air distribution.

关键词： air sparging sandbox test particle movement current measurement

Analytical and experimental bearing capacities of system scaffolds

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第1期10卷 82-92页

作者： Jui-lin PENG Tsong YEN ching-chi kuo Siu-lai CHAN Department of Construction Engineering National Yunlin University of Science and Technology Taiwan 64002 China Department of Civil Engineering Chaoyang University of Technology Taiwan 41349 China Department of Civil Engineering National Chung-Hsing University Taiwan 402 China Department of Civil and Structure Engineering Hong Kong Polytechnic University Hong Kong China

We investigated the structural behavior and bearing capacity of system *** research showed that the critical load of a system scaffold structure without diagonal braces is similar to that of a door-shaped steel scaffold *** stiffness between vertical props in system scaffolds can be defined based on a comparison between analytical and experimental *** the number of scaffold stories increases,the critical loads of system scaffolds *** braces markedly enhance the critical load of system *** coupling joint position between vertical props should be kept away from story-to-story joints to prevent a reduction in critical *** critical load of a system scaffold decreases as the quantity of extended vertical props at the bottom of the structure increases.A large Christmas tree set up by system scaffolds under various loads was used as an example for analysis and to check the design of system scaffolds.

关键词： Bearing capacity Critical Load System scaffold

Evaluations of Novel Waveform Coding Signals Based on Finite Projective Plane

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2016年第1期14卷 54-59页

作者： chien-Hsing Liao Tai-kuo Woo chi-Chung Chen Ing-Jiunn Su the Program of Information Technology Fooyin University the Department of Information Management National Defense University the Department of Electrical and Electronic Engineering National Defense University

The most popular and representative classic waveform codes are referred to as orthogonal,bi-orthogonal,simplex,and etc,but the choice of waveform codes is essentially identical in error performance and cross correlation *** bi-orthogonal coding requires half the bandwidth of the others,such coding scheme is attractive only when large bandwidth is *** this paper,a novel finite projective plane（FPP） based waveform coding scheme is proposed,which is with similar error performance and cross ***,the bandwidth requirement will grow in a quadratic way,but not in an exponential way with the values of message bit numbers（k）.The proposed scheme takes obvious advantages over the bi-orthogonal scheme when k ≥ 6.

关键词： Finite projective plane orthogonal coding simplex coding waveform coding

User-guided line abstraction using coherence and structure analysis

在线全文

学校读者我要写书评

暂无评论

Computational Visual Media 2017年第2期3卷 177-188页

作者： Hui-chi Tsai Ya-Hsuan Lee Ruen-Rone Lee Hung-kuo Chu Department of Computer Science "National Tsing Hua University" Information and Communications Research Laboratories Industrial Technology Research Institute

Line drawing is a style of image abstraction where the perceptual content of the image is conveyed using distinct straight or curved lines. However,extracting semantically salient lines is not trivial and mastered only by skilled artists. While many parametric filters have successfully extracted accurate and coherent lines, their results are sensitive to parameter choice and easily lead to either an excessive or insufficient number of lines. In this work, we present an interactive system to generate concise line abstractions of arbitrary images via a few user specified strokes. Specifically, the user simply has to provide a few intuitive strokes on the input images, including tracing roughly along edges and scribbling on the region of interest, through a sketching interface. The system then automatically extracts lines that are long,coherent and share similar textural structures to form a corresponding highly detailed line drawing. We have tested our system with a wide variety of images. Our experimental results show that our system outperforms state-of-the-art techniques in terms of quality and efficiency.

关键词： line abstraction interactive drawing coherence strokes structure strokes stroke matching

Methylation of IRAK3 is a novel prognostic marker in hepatocellular carcinoma

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2015年第13期21卷 3960-3969页

作者： chih-chi kuo Yu-Lueng Shih Her-Young Su Ming-De Yan Chung-Bao Hsieh chin-Yu Liu Wei-Ting Huang Mu-hsien Yu Ya-Wen Lin Graduate Institute of Medical Sciences National Defense Medical Center Division of Gastroenterology Department of Internal MedicineTri-Service General HospitalNational Defense Medical Center Department of Obstetrics and Gynecology Tri-Service General HospitalNational Defense Medical Center Cancer Center Wan Fang HospitalTaipei Medical University Division of General Surgery Department of SurgeryTri-Service General HospitalNational Defense Medical Center Department of Nutritional Science Fu Jen Catholic University Department and Graduate Institute of Microbiology and Immunology Graduate Institute of Medical SciencesNational Defense Medical Center Graduate Institute of Life Sciences National Defense Medical Center

AIM: To examine the methylation levels of interleukin-1 receptor-associated kinase 3(IRAK3) and GLOXD1 and their potential clinical applications in hepatocellular carcinoma(HCC).METHODS: m RNA expression and promoter methylation of IRAK3 and GLOXD1 in HCC cells were analyzed by reverse transcription-polymerase chain reaction(RTPCR) and methylation-specific PCR(MSP), respectively. Using pyrosequencing results, we further established a quantitative MSP(Q-MSP) system for the evaluation of IRAK3 and GLOXD1 methylation in 29 normal controls and 160 paired HCC tissues and their adjacent nontumor tissues. We also calculated Kaplan-Meier survival curves to determine the applications of gene methylation in the prognosis of ***: IRAK3 and GLOXD1 expression was partially restored in several HCC cell lines after treatment with 5-aza-2′-deoxycytidine(DNA methyltransferase inhibitor; 5DAC). A partial decrease in the methylated band was also observed in the HCC cell lines after 5DAC treatment. Using GLOXD1 as an example, we found a significant correlation between the data obtained from the methylation array and from pyrosequencing. The methylation frequency of IRAK3 and GLOXD1 in HCC tissues was 46.9% and 63.8%, respectively. Methylation of IRAK3 was statistically associated with tumor stage. Moreover, HCC patients with IRAK3 methylation had a trend toward poor 3-year disease-free survival(P < 0.05). CONCLUSION: IRAK3 and GLOXD1 were frequently methylated in HCC tissues compared to normal controls and nontumor tissues. IRAK3 methylation was associated with tumor stage and poor prognosis of patients. These data suggest that IRAK3 methylation is a novel prognostic marker in HCC.

关键词： IRAK3 GLOXD1 Hepatocellular carcinoma DNA methylat

Gas Kinetic Scheme for Anisotropic Savage-Hutter Model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Computational Physics 2013年第5期13卷 1432-1454页

作者： Wen-chi Chen chih-Yu kuo Keh-Ming Shyue Yih-chin Tai Division of Mechanics Research Center for Applied SciencesAcademia SinicaTaipei 115Taiwan Department of Mathematics National Taiwan UniversityTaipei 106Taiwan Department of Hydraulic and Ocean Engineering National Cheng Kung UniversityTainan 701Taiwan

The gas-kinetic scheme is applied to a depth-integrated continuum model for avalanche flows,namely the Savage-Hutter *** this method,the continuum fluxes are calculated based on the pseudo particle motions which are relaxed from nonequilibrium to equilibrium *** processes are described by the Bhatnagar-GrossKrook(BGK)*** benefit of this scheme is its capability to resolve shock discontinuities sharply and to handle the vacuum state without special *** the Savage-Hutter equation bears an anisotropic stress on the tangential space of the topography,the equilibrium distribution function of the microscopic particles are shown to be *** anisotropic stresses are the key to preserve the coordinate objectivity in the Savage-Hutter *** effect of the anisotropic stress is illustrated by two examples:an axisymmetric dam break and a finite mass sliding on an inclined plane *** is found that the propagation of the flow fronts significantly depends on the orientation of the principal axes of the tangential stresses.

关键词： Gas-kinetic scheme BGK equation extended Savage-Hutter equation

Coordinated dynamic mission planning scheme for intelligent multi-agent systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Central South University 2012年第11期19卷 3170-3179页

作者：彭军文孟飞谢国祺张晓勇 kuo-chi LIN School of Information Science and Engineering Central South UniversityChangsha 410075China Hunan Engineering Laboratory for Advanced Control and Intelligent Automation(Central South University) Changsha 410075China Embedded Systems and Networking Laboratory Hunan Provincial Key Laboratory of Network and Information Security(Hunan University)Changsha 410075China Department of Mechanical and Aerospace Engineering University of Central FloridaOrlandoFL 32816USA

Mission planning was thoroughly studied in the areas of multiple intelligent agent systems,such as multiple unmanned air vehicles,and multiple processor ***,it still faces challenges due to the system complexity,the execution order constraints,and the dynamic environment *** address it,a coordinated dynamic mission planning scheme is proposed utilizing the method of the weighted AND/OR tree and the *** the scheme,the mission is decomposed into a time-constraint weighted AND/OR tree,which is converted into an AOE-Network for mission ***,a dynamic planning algorithm is designed which uses task subcontracting and dynamic re-decomposition to coordinate *** scheme can reduce the task complexity and its execution time by implementing real-time dynamic *** simulation proves the effectiveness of this approach.

关键词： weighted AND/OR tree multiple intelligent agent coordinated dynamic mission planning AOE-Network