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A Three-Point Method for Separating Incident and Reflected Waves over A Sloping Bed

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china Ocean Engineering 2002年第4期17卷 499-511页

作者： CHANG hsien-kuo Department of Civil Engineering National Chiao Tung UniversityHsinchu 300China

This study presents a three-point method for separating incident and reflected waves to explain normally incident waves' propagating over a sloping bed. linear wave shoaling is used to determine changes in wave amplitude and phase in response to variations of bathymetry. The wave reflection coefficient and incident amplitude are estimated from wave heights measured at three fixed wave gauges with unequal spacing. Sensitivity analysis demonstrates that the proposed method can predict the reflection and amplitude of waves over a sloping bed more accurately than the two-point method.

关键词： reflected wave wave shoaling sloping bed

Long Wave Reflection and Transmission over A Sloping Step

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海洋工程：英文版 2004年第3期18卷 371-380页

作者： hsien-kuo CHANG Jin-Cheng LIOU Department of Civil Engineering National Chiao Tung University 1001 Ta Hsuech Road Hsinchu 300 ChinaDepartment of Civil Engineering National Chiao Tung University 1001 Ta Hsuech Road Hsinchu 300 China

This investigation examines long wave reflection and transmission induced by a sloping step. Bellman and Kalaba's (1959) invariant imbedding is introduced to find wave reflection. An alternative method matching both the surface elevation and its surface slope of each region at the junction is applied to the determination of wave reflection and transmission. The proposed methods are compared with the accurate numerical results of Porter and Porter (2000) and those of Mei (1983) for a vertical step. The wave reflection obtained for a mildly sloping step differs significantly from the result of Mei. The wave reflection is found to fluctuate owing to wave trapping for the mild sloping step. The height and the face slope of the step are important for determining wave reflection and transmission coefficients.

关键词： long wave reflection coefficient wave transmission wave trapping

Optimizing SUS 304 wire drawing process by grey relational analysis utilizing Taguchi method

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Journal of University of Science and Technology Beijing 2008年第6期15卷 714-722页

作者： Al-Refaie Abbas Ming-hsien Li kuo-Cheng Tai Department of Industrial Engineering University of Jordan Amman Jordan Department of Industrial Engineering and Systems Management Feng Chia University Taichung China Taipei Department of Mechanical and Computer-Aided Engineering Feng Chia University Taichung China Taipei

In the stainless steel 304 （SUS 304） wire drawing process, optimizing the die life and wire tensile strength, which are the larger-the-better quality characteristics （QCH） types, is of main interest. Three control factors, involving reduction ratio, lubricant temperature, and drawing speed, were investigated utilizing L9（34） orthogonal array （OA）. The grey relational analysis was conducted for the normalized signal-to-noise （S/N） ratios. The ordinal value of the grey grade was then used to decide optimal factor levels. The anticipated improvements in die life and wire tensile strength were estimated 25.31 h and 22.50 kg/mm2, respectively. To decide the significant factor which had effect on each QCH and predict the average value of each QCH, analysis of variance （ANOVA） was performed for S/N ratio and QCH. Confirmation experiments were then conducted, where a good overlap was noticed between the predicted and confirnation intervals for each QCH. The Hotelling T2 and the sample generalized variance control charts were finally utilized in controlling and monitoring future production. In conclusion, the grey relational analysis utilizing Taguchi method is an effective approach for optimizing the die life and wire tensile strength for SUS wire drawing process. 2008 University of Science and Technology Beijing. All rights reserved.

关键词： stainless steel grey relational analysis analysis of variance (ANOVA) optimization control charts

Matched glass-to-Kovar seals in N_2 and Ar atmospheres

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International Journal of Minerals,Metallurgy and Materials 2013年第9期20卷 874-882页

作者： Cheng-hsien kuo Pi-ying Cheng Chang-pin Chou Department of Mechanical Engineering Chiao Tung University

The oxidation of Kovar alloy was investigated, the wetting and spreading behavior of hard and soft glasses on Kovar alloy were studed by using the sessile drop method, and the quality and the seal strength of glass-Kovar seals were tested. The experimental results indicated that the preoxidation of Kovar alloy for approximately 10 min at 700℃ in air resulted in excellent adherence in glass-Kovar seals. The wetting and spreading behavior of glass on preoxidized Kovar alloy were superior to that on nonoxidized Kovar alloy. The wetting ability of ASF110 glass, at 950℃ and 980℃ in Ar and N2 atmospheres, was significantly superior to that of ASF200R and ASF700 glasses. The seal quality of the glass-preoxidized Kovar seal was superior to that of the glass-nonoxidized Kovar seal. The shear strength of the ASFll0 glass-preoxidized Kovar seal, which was prepared at 980℃ for 20 min in an Ar atmosphere, was approximately 3.9 MPa.

关键词： Kovar alloy glass sealing argon nitrogen oxidation wetting

Web-Based Adaptive Testing System

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Wuhan University Journal of Natural Sciences 2006年第1期11卷 313-322页

作者： kuo Tzai-hsing LIN hsien-tang YUAN Shyan-ming Department of Computer and Information Science National Chiao Tung University Hsinchu 30010 Taiwan China

Due to the maturing of Internet technology, the adaptive testing can be utilized in the web-based environment and the examinee can take the test anywhere and any time. The purpose of the research is to apply item response theory （IRT）, adaptive testing theory and web-service technique to construct an XML format itembank and a system of web- based adaptive testing （WAT） by the framework of threetiered client server distance testing.

关键词： IRT adaptive testing XML

Distributed fair queuing algorithm based on compensation coordination scheduling in WMN

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High Technology Letters 2012年第3期18卷 314-320页

作者： Jiang Fu Peng Jun kuo chi LIN School of Information Science and Engineering Central South University Changsha 410075 P. R. China College of Engineering and Computer Science University of Central Florida Orlando Florida USA 32816

This paper proposes a distributed fair queuing algorithm which is based on compensation coordi- nation scheduling in wireless mesh networks, considering such problems as the location-dependent competition and unfair channel bandwidth allocation among nodes. The data communication process requiring the establishment of compensation coordination scheduling model is divided into three periods： the sending period, the compensation period and the dormancy period. According to model parameters, time constraint functions are designed to limit the execution length of each period. The algorithms guarantee that the nodes complete fair transmission of network packets together in accordance with the fixed coordination scheduling rule of the model. Simulations and analysis demonstrate the effectiveness of the proposed algorithm in network throughput and fairness.

关键词： wireless mesh network (WMN) fair queuing distributed scheduling fairness

A diagnostic dilemma:acute abdomen presenting as segmental arterial mediolysis masked by a ruptured hepatocellular carcinoma

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Gastroenterology Report 2017年第3期5卷 244-246,I0003页

作者： Chen-Yi Liao Wu-hsien kuo En-Hua Huang An-Tie Hsieh ching-Chang Le chi-Chang Tsai Chao-Wen Hsueh Department of Medicine Kaohsiung Armed Forces General HospitalKaohsiungTaiwan

A 65-year-old male was brought to our hospital with right upper abdominal fullness sensation and recent body weight loss of about 3 *** patient had developed episodes of melena following progressive abdominal muscular guarding and drop of haemoglobin level to 6.3 g/*** abdominal computed tomography scan disclosed a ruptured hepatocellular cell carcinoma.A segmental arterial mediolysis was found on the superior mesenteric artery in the process of repairing the ruptured right hepatic artery with the assistance of *** embolization was carried out and permanent haemostasis was achieved.

关键词： segmental arterial mediolysis hepatocellular carcinoma

Enhancement of matrix metalloproteinases 2 and 9 accompanied with neurogenesis following collagen glycosaminoglycan matrix implantation after surgical brain injury

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Neural Regeneration Research 2018年第6期13卷 1007-1012页

作者： Wei-Cherng Hsu Chun-hsien Yu Woon-Man Kung kuo-Feng Huang Department of Ophthalmology Taipei Tzu Chi Hospital Buddhist Tzu Chi Medical Foundation School of Medicine Buddhist Tzu Chi University Department of Pediatrics Taipei Tzu Chi Hospital Buddhist Tzu Chi Medical Foundation Division of Neurosurgery Department of Surgery Taipei Tzu Chi Hospital Buddhist Tzu Chi Medical Foundation Department of Exercise and Health Promotion College of Education Chinese Culture University

Surgical brain injury may result in irreversible neurological deficits. Our previous report showed that partial regeneration of a traumatic brain lesion is achieved by implantation of collagen glycosaminoglycan（CGM）. Matrix metalloproteinases（MMPs） may play an important role in neurogenesis but there is currently a lack of studies displaying the relationship between the stimulation of MMPs and neurogenesis after collagen glycosaminoglycan implantation following surgical brain trauma. The present study was carried out to further examine the expression of MMP2 and MMP9 after implantation of collagen glycosaminoglycan（CGM） following surgical brain trauma. Using the animal model of surgically induced brain lesion, we implanted CGM into the surgical trauma. Rats were thus divided into three groups：（1） sham operation group： craniotomy only;（2） lesion（L） group： craniotomy ＋ surgical trauma lesion;（3） lesion ＋ CGM（L ＋ CGM） group： CGM implanted following craniotomy and surgical trauma lesion. Cells positive for SOX2（marker of proliferating neural progenitor cells） and matrix metalloproteinases（MMP2 and MMP9） in the lesion boundary zone were assayed and analyzed by immunofluorescence and ELISA commercial kits, respectively. Our results demonstrated that following implantation of CGM after surgical brain trauma, significant increases in MMP2^＋/SOX2^＋ cells and MMP9^＋/SOX2^＋ cells were seen within the lesion boundary zone in the L ＋ CGM group. Tissue protein concentrations of MMP2 and MMP9 also increased after CGM scaffold implantation. These findings suggest that implantation of a CGM scaffold alone after surgical brain trauma can enhance the expression of MMP2 and MMP9 accompanied by neurogenesis.

关键词： collagen glycosaminoglycan matrix metalloproteinases surgical brain trauma neurogenesis neural regeneration

Short-term Load Forecasting of Regional Distribution Network Based on Generalized Regression Neural Network Optimized by Grey Wolf Optimization Algorithm

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CSEE Journal of Power and Energy Systems 2021年第5期7卷 1093-1101页

作者： Leijiao Ge Yiming Xian Zhongguan Wang Bo Gao Fujian chi kuo Sun Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of TechnologyTianjin 300132China china Electric Power Research Institute Co.Ltd Beijing 100192China. State Grid Tianjin Electric Power Company Tianjin 300010China.

Short-term load forecasting of regional distribution network is the key to the economic operation of smart distribution systems,which not only requires high accuracy and fast calculation speed,but also has a diversity of influential factors and strong *** paper proposes a short-term load forecasting model for regional distribution network combining the maximum information coefficient,factor analysis,gray wolf optimization,and generalized regression neural network(MIC-FA-GWO-GRNN).To screen and decrease the dimension of the multiple-input features of the short-term load forecasting model,MIC is first used to quantify the non-linear correlation between the load and input features,and to eliminate the ineffective features,and then FA is used to reduce the dimension of the screened input features on the premise of preserving the main information of input *** that the high-precision short-term丨oad forecasting based on GWO-GRNN model is *** is used to regressively analyze the input features after screening and dimension reduction,and the parameter of GRNN is optimized by using the GWO,which has strong global searching ability and fast *** a case study of a regional distribution network in Tianjin,china verifies the accuracy and applicability of the proposed forecasting model.

关键词： Factor analysis generalized regression neural network gray wolf optimization maximum information coefficient short-term load forecasting