Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

Journal

Discipline
Institution
Keyword
Publication Year
Publication
File Type

Articles 19831 - 19860 of 27540

Full-Text Articles in Engineering

Comparative Empirical Analysis On Computer Software Piracy Behaviors Between China And The United States: An Exploratory Study, Xiang Fang, Sooun Lee Jul 2016

Comparative Empirical Analysis On Computer Software Piracy Behaviors Between China And The United States: An Exploratory Study, Xiang Fang, Sooun Lee

Journal of International Technology and Information Management

Using the data collected from several universities in China and the United States, which have drastically different piracy rates, economic development stages, income levels, and national cultures, this study aims to identify which demographic factors affect software piracy significantly. Totally, the dataset includes 600 valid responses. Multivariate data analysis, supported by Multivariate Analysis of Variance and Turkey’s test, reveals that among various factors, country difference and gender most significantly influence software piracy. In addition, this study offers recommendations on how to curb software piracy effectively.

Go to article

Properties In Hardness Of Al-Cu Couples Diffused At 813 K, J Hinojosa-Torres, Jm Aceves-Hernández Jul 2016

Properties In Hardness Of Al-Cu Couples Diffused At 813 K, J Hinojosa-Torres, Jm Aceves-Hernández

Journal of Metals, Materials and Minerals

Al-Cu couples were heated to 813 K during 200, 320 and 480 hours. The heat treatment conditions caused the welding of the metals. After the mentioned conditions, it was observed the formation of two contiguous plates like (~15 to 30 micrometres, width) in parallel direction to the contact section. These plates like were chemically identified and its compositions corresponded to the h2 (CuAl) phase and to the q (CuAl2) phase of the aluminium-copper system. The measurements of micro hardness that were carried out on these plates like gave values of 620HV0.05 and 500HV0.05 (on the average) respectively. In the Cu-rich …

Go to article

The Progress Of Order-Structured Membrane Electrode Assembly, Shang-Feng Jiang, Bao-Lian Yi Jun 2016

The Progress Of Order-Structured Membrane Electrode Assembly, Shang-Feng Jiang, Bao-Lian Yi

Journal of Electrochemistry

Performances of proton exchange membrane fuel cells (PEMFCs) have been recently improved. However, the cost and Pt loading must be further reduced for the commercialization of PEMFCs. Previous researches have proved that the order-structured electrode is beneficial to the effective utilization of Pt-based catalysts, decreasing the Pt loading and increasing the three-phase boundary for reaction. Especially, the nanostructure thin films (NSTFs) electrode, an ultra-thin catalytic layer developed by 3M Company, demonstrates high performance and durability. Besides, some other researchers have employed the high conductive carbon nanotube arrays or high stable metal oxide arrays as the order-structured catalyst supports for fundamental …

Go to article

Recent Progress In Solid-State Nmr Study Of Electrode/Electrolyte Materials For Lithium/Sodium Ion Batteries, Gui-Ming Zhong, Zi-Geng Liu, Da-Wei Wang, Qi Li, Ri-Qiang Fu, Yong Yang Jun 2016

Recent Progress In Solid-State Nmr Study Of Electrode/Electrolyte Materials For Lithium/Sodium Ion Batteries, Gui-Ming Zhong, Zi-Geng Liu, Da-Wei Wang, Qi Li, Ri-Qiang Fu, Yong Yang

Journal of Electrochemistry

Solid state NMR technique is a powerful tool for characterizing the local structure and compositions of solid materials quantitatively. A comprehensive understanding of the structure evolution during the electrochemical reactions of the materials for lithium/sodium ion batteries will be obtained with the combination of solid state NMR, XRD, and XAS methods. Through analyzing solid state NMR spectra, we can obtain the compositions, local structures and ion diffusion dynamics of electrodes, electrolytes and surface layers for lithium/sodium ion batteries, providing an important theoretical support for the design and development of high-performance materials for batteries. In this paper, we review the recent …

Go to article

Reduced Graphene Oxide (Rgo) Hollow Network Cages For High-Performance Electrochemical Energy Storage, Chi Zhang, Xu-Jun He, Gao-Ren Li Jun 2016

Reduced Graphene Oxide (Rgo) Hollow Network Cages For High-Performance Electrochemical Energy Storage, Chi Zhang, Xu-Jun He, Gao-Ren Li

Journal of Electrochemistry

The reduced graphese oxide (RGO) hollow network cages were synthesized via zinc oxide (ZnO) template-assisted electrodeposition. The as-prepared RGO hollow network cages exhibited the multi-level architectures, from nano sheets, porous structures, networks, to 3D microscaled hollow cages, which can simultaneously optimize transport of electroactive species, utilization rate of electrode material, and super capacitive performance. Electrochemical measurements confirmed the superior performance of RGO hollow network cages for supercapacitors (SCs), such as high Csp (393 F⋅g-1 at 1.0 A⋅g-1), excellent rate capability (21.2% Csp loss from 1.0 to 20 A⋅g-1), and superior cycling stability (< 1% Csp loss after 10000 cycles).

Go to article

Electrochemical And In Situ X-Ray Absorption Fine Structure Study Of Li-Rich Cathode Materials, Meng-Yan Hou, Hong-Liang Bao, Ke Wang, Jian-Qiang Wang, Yong-Yao Xia Jun 2016

Electrochemical And In Situ X-Ray Absorption Fine Structure Study Of Li-Rich Cathode Materials, Meng-Yan Hou, Hong-Liang Bao, Ke Wang, Jian-Qiang Wang, Yong-Yao Xia

Journal of Electrochemistry

A series of the lithium-rich and manganese-based layered structure xLi2MnO3•(1-x)LiMn1/3Ni1/3Co1/3O2 (x = 0.3,0.5,0.7) materials were synthesized by a co-precipitation method, and followed by a solid-state reaction process. By comparing the first cycle efficiency, the reversible discharge capacity, the cycling stability and the voltage decay during the charge/discharge cycling process, the material with the composition of 0.5Li2MnO3•0.5LiMn1/3Ni1/3Co1/3O2was found to show the best electrochemical performance. The lithium storage mechanism and thermal stability of the de-lithiated compound were also investigated …

Go to article

Uniform Nanoshells For Functional Materials: Constructions And Applications, Shu-Yi Duan, Wei Zhang, Jun-Yu Piao, An-Min Cao, Li-Jun Wan Jun 2016

Uniform Nanoshells For Functional Materials: Constructions And Applications, Shu-Yi Duan, Wei Zhang, Jun-Yu Piao, An-Min Cao, Li-Jun Wan

Journal of Electrochemistry

As a significant protocol for materials treatment, surface modification has found broad applications in different fields including catalyst, photochemistry, and electrochemistry. Herein, we introduced the representative synthetic methodologies for the constructions of different functional materials with a focus on their core-shell structures. By taking the electrode materials in lithium ion batteries as an example, we demonstrated the importance of surface modification on the electrode materials. Different coating materials ranging from metal oxides, metal phosphates to carbon have been discussed. We also showed that an accurate control on the surface layer can be crucial for optimizing the electrochemical performances of the …

Go to article

Synthesis, Structural Diversity, And Redox Control Of Cyclometalated Monoruthenium Complexes, Zhong-Liang Gong, Jiang-Yang Shao, Yu-Wu Zhong Jun 2016

Synthesis, Structural Diversity, And Redox Control Of Cyclometalated Monoruthenium Complexes, Zhong-Liang Gong, Jiang-Yang Shao, Yu-Wu Zhong

Journal of Electrochemistry

Cyclometalated ruthenium complexes have received increasing attractions recently due to their excellent redox and photophysical properties. One structural feature of these complexes is that there is a ruthenium-carbon (Ru-C) σ bond presented in the molecule. Three common methods, namely, the “late metalation”, “early metalation”, and “transmetalation” methods, for the synthesis of cyclometalated ruthenium complexes are discussed and summarized. General strategies for the design of cyclometalating ligand and cyclometalated ruthenium complexes are introduced. By using different ancillary ligands, such as pyridine, imidazole, triazole, and pyrimidine, a great number of ruthenium complexes can be prepared. The presence of the Ru-C bond significantly …

Go to article

3, 4-Ethylenedioxythiophene Monomer As Safety-Enhancing Additive For Lithium Ion Batteries, Wei-Xiao Ji, Feng Wang, Jiang-Feng Qian, Yu-Liang Cao, Xin-Ping Ai, Han-Xi Yang Jun 2016

3, 4-Ethylenedioxythiophene Monomer As Safety-Enhancing Additive For Lithium Ion Batteries, Wei-Xiao Ji, Feng Wang, Jiang-Feng Qian, Yu-Liang Cao, Xin-Ping Ai, Han-Xi Yang

Journal of Electrochemistry

Safety concern is a major obstacle hindering the wide applications of large-capacity lithium ion batteries (LIBs) in electric vehicles. In this paper, a polymerizable monomer of 3, 4-ethylenedioxythiophene (EDOT) was proposed and tested as an electrolyte additive for enhancing the safety of LIBs. The electro-oxidative polymerization behaviors and influence of PEDOT additive on the thermal behavior of LiCoO2 cathode, as well as the safety performance and electrochemical properties of LiCoO2-based LIBs were investigated. The results from cyclic voltammetry (CV) and transmission electron microscope (TEM) characterizations indicated that the monomer additive can be electro-oxidatively polymerized to form a …

Go to article

Electrochemiluminescence Immunosensor Based On Platinum Nanoparticles For The Determination Of Apolipoprotein A1, Ni Liao, Ying Zhuo, Ruo Yuan Jun 2016

Electrochemiluminescence Immunosensor Based On Platinum Nanoparticles For The Determination Of Apolipoprotein A1, Ni Liao, Ying Zhuo, Ruo Yuan

Journal of Electrochemistry

In this paper, a novel electrochemiluminescence (ECL) immunosensor for the detection of apolipoprotein A1 was constructed based on flower-like platinum nanoparticles (PtNFs) via a one-pot chemical synthesis method. The PtNFs was used to immobilize the secondary antibody and enzyme (GOD). Then the prepared bioconjugates were introduced onto the electrode via sandwich immunoreactions. Accordingly, the ECL luminophore peroxydisulfate (S2O82-) was presented in the working buffer solution containing an appropriate amount of glucose. Through the ECL responses of S2O82- and O2, a dramatically amplified ECL signal was obtained for the reason …

Go to article

Developments Of Photo-Assisted Fuel Cells, Ling-Ling Zhang, Shao-Jun Dong Jun 2016

Developments Of Photo-Assisted Fuel Cells, Ling-Ling Zhang, Shao-Jun Dong

Journal of Electrochemistry

The exploitation and utilization of fossil fuels have led to serious energy crisis and environmental pollution. In this case, the development of renewable energy is an alternative to traditional energy consumption. Fuel cells (FCs) can convert chemical energy into electricity via the electrochemical reaction, which is green and environment-friendly. Photo-assisted FCs integrate photo-responsive components into FCs, leading to the dual routes of energy conversion including light energy to electricity and chemical energy to electricity, and thus, improving the energy utilization efficiency. The development of photo-assisted FCs is significant for practical application and promising to solve the coming energy crisis. In …

Go to article

Professional Development For The Integration Of Engineering In High School Stem Classrooms, Jonathan E. Singer, Julia M. Ross, Yvette Jackson-Lee Jun 2016

Professional Development For The Integration Of Engineering In High School Stem Classrooms, Jonathan E. Singer, Julia M. Ross, Yvette Jackson-Lee

Journal of Pre-College Engineering Education Research (J-PEER)

Science, Technology, Engineering, and Mathematics (STEM) education in the U.S. is in transition. The recently published A Framework for K-12 Science Education: Practices, Crosscutting Concepts, and Core Ideas as well as the Next Generation Science Standards are responsive to this call and clearly articulate a vision that includes engineering practices as key components. This shift presents significant challenges to school districts owing to a stark lack of research-based engineering-focused instructional materials and corresponding teacher professional development. The purpose of this study was to investigate the impact of a professional development program on high school STEM teachers’ ability to enact design-based …

Go to article

Secure Software Engineering Education: Knowledge Area, Curriculum And Resources, Xiaohong Yuan, Li Yang, Bilan Jones, Huiming Yu, Bei-Tseng Chu Jun 2016

Secure Software Engineering Education: Knowledge Area, Curriculum And Resources, Xiaohong Yuan, Li Yang, Bilan Jones, Huiming Yu, Bei-Tseng Chu

Journal of Cybersecurity Education, Research and Practice

This paper reviews current efforts and resources in secure software engineering education, with the goal of providing guidance for educators to make use of these resources in developing secure software engineering curriculum. These resources include Common Body of Knowledge, reference curriculum, sample curriculum materials, hands-on exercises, and resources developed by industry and open source community. The relationship among the Common Body of Knowledge proposed by the Department of Homeland Security, the Software Engineering Institute at Carnegie Mellon University, and ACM/IEEE are discussed. The recent practices on secure software engineering education, including secure software engineering related programs, courses, and course modules …

Go to article

Seismic Response Of An Arch-Beam Interacting With Sequential Moving Train Loads, Jong-Dar Yau, Ladislav Frýba, Shota Urushadze Jun 2016

Seismic Response Of An Arch-Beam Interacting With Sequential Moving Train Loads, Jong-Dar Yau, Ladislav Frýba, Shota Urushadze

Journal of Marine Science and Technology–Taiwan

Considering the axial-flexural coupling nature of an arch bridge subjected to seismic wave, this paper is aimed at investigation of dynamic response for a train moving over a railway arch-bridge shaken by horizontal ground motions. For analytical formulation, the arch bridge is idealized as a flat-rise parabolic arch with constant sectional properties uniformly distributed along the horizontal span and the train moving over it as a sequence of identical sprung mass units with constant intervals. To perform dynamic analysis of vehicle-bridge system shaken by horizontal earthquakes, an incremental-iterative procedure is proposed in this study. From numerical results, the multiple support …

Go to article

Influence Of Shot-Peening-Induced Residual Stresses On Post-Necking Behavior Of Tempered Ultrahigh-Strength Low Alloy 300m Steel, Shing-Hoa Wang, Yi-Ming Jen, Yu-Cyuan Lin, Bee-Fong Wu, Hsiu-Chuan Hsu, Ji-Jung Yeh Jun 2016

Influence Of Shot-Peening-Induced Residual Stresses On Post-Necking Behavior Of Tempered Ultrahigh-Strength Low Alloy 300m Steel, Shing-Hoa Wang, Yi-Ming Jen, Yu-Cyuan Lin, Bee-Fong Wu, Hsiu-Chuan Hsu, Ji-Jung Yeh

Journal of Marine Science and Technology–Taiwan

The effect of the tempering temperature and shot peening time on the uniaxial post-necking behavior of 300M steel (silicon-modified AISI 4340 steel) was experimentally investigated in this study. Normalized specimens were divided into two groups: one tempered at 280C and the other tempered at 302C. The specimens were shot-peened for various durations to study the effect of the shot peening time on their mechanical properties. Experimental results showed that the shot-peeninginduced compressive residual stress in the specimens tempered at 302C was greater than that in the specimens tempered at 280C, and the optimum compressive residual stress was obtained by shot …

Go to article

Effect Of Lorentz Force On Hydrogen Production In Water Electrolysis Employing Multielectrodes, Ming-Yuan Lin, Wen-Nong Hsu, Lih-Wu Hourng, Teng-Shih Shih, Chien-Ming Hung Jun 2016

Effect Of Lorentz Force On Hydrogen Production In Water Electrolysis Employing Multielectrodes, Ming-Yuan Lin, Wen-Nong Hsu, Lih-Wu Hourng, Teng-Shih Shih, Chien-Ming Hung

Journal of Marine Science and Technology–Taiwan

The aim of this study was to investigate high-efficiency hydrogen production through water electrolysis by using multiple electrodes; the investigated approach can be applied in industry. In this study, three groups of parallel electrodes were used to conduct experiments and research related to water electrolysis parameters. During electrolysis, we introduced Lorentz forces to an electrolytic cell to determine whether the multielectrode mode is identical to the single-electrode mode regarding increases in hydrogen production. The results showed that a multielectrode group instantly increased gas production. In addition, introducing an external upward magnetic field into an electrolytic cell increased gas production at …

Go to article

The Development Of New Type Free-Fall Lifeboat Using Fluid Structure Interaction Analysis, Ahmad Fauzan Zakki, Aulia Windyandari, Dong Myung Bae Jun 2016

The Development Of New Type Free-Fall Lifeboat Using Fluid Structure Interaction Analysis, Ahmad Fauzan Zakki, Aulia Windyandari, Dong Myung Bae

Journal of Marine Science and Technology–Taiwan

Freefall lifeboats provide a safe alternative to conventional lifeboats for emergency evacuation from ships and offshore platforms. The international regulations require that a lifeboat for free-fall launching should be able to give protection against impact accelerations when it is launched with its full occupants and equipment from at least the maximum designed height. Since the height of offshore structure to the water surface is significantly high, during the water entry phase the acceleration response of the free-fall lifeboat might cause an injury to the occupants. The special hull form design should be applied to reduce the acceleration. The aim of …

Go to article

Model For Assessing The Functionality Of Soil And Water Conservation Facilities, Nai-Hsin Pan, Kuei-Yen Chen Jun 2016

Model For Assessing The Functionality Of Soil And Water Conservation Facilities, Nai-Hsin Pan, Kuei-Yen Chen

Journal of Marine Science and Technology–Taiwan

Most soil and water conservation facilities are located in remote areas, posing measurement difficulties for precision instruments. Therefore, visual inspection, which is advantageous because of its high speed, is the primary assessment method for such facilities. However, the degree of infrastructural damage subjectively assessed by various inspectors may vary. Therefore, to overcome the problem induced by inspectors’ subjectivity in assessing facilities, this study adopted the concept of fuzzy set theory to establish a soil and water conservation facility assessment model that can define the membership functions of specific semantic ranges. This study applied semantics to infer current facility conditions, which …

Go to article

Optimization Of Large-Scale Economic Dispatch With Valve-Point Effects Using A Modified Hybrid Pso-Dsm Approach, Chun-Lung Chen, Yu-Liang Lin, Yen-Chang Feng Jun 2016

Optimization Of Large-Scale Economic Dispatch With Valve-Point Effects Using A Modified Hybrid Pso-Dsm Approach, Chun-Lung Chen, Yu-Liang Lin, Yen-Chang Feng

Journal of Marine Science and Technology–Taiwan

This paper proposes a modified hybrid particle swarm optimization (PSO) and the direct search method (DSM) for the solution of large-scale non-convex economic dispatch (NED) problem with valve-point effects. A novel diversity based particle swarm optimization (DPSO) with a fewer iterations required is developed to increase the possibility of generating high quality initial solutions for the DSM. The enhanced direct search method (EDSM) incorporates the parallel nature of evaluation programming into the direct search procedure to enhance its search capacity about global exploration and local optimization using the answer from DPSO as starting points. Many inequality and equality constraints can …

Go to article

Robust Stabilization Of Uncertain Switched Nonlinear Systems With Two Modes, Jian-Qiang Wang, Chee-Fai Yung Jun 2016

Robust Stabilization Of Uncertain Switched Nonlinear Systems With Two Modes, Jian-Qiang Wang, Chee-Fai Yung

Journal of Marine Science and Technology–Taiwan

In this note, based on a control Lyapunov function approach, an integrated design of switching laws and feedback controllers for uncertain switched nonlinear control systems with two modes is discussed. A sufficient condition for the existence of globally asymptotically stabilizing state feedback laws (switching laws+ controllers) is derived. Moreover, an explicit rule for constructing switching laws and an explicit formula for synthesizing feedback controllers are presented. An illustrative example is given for verifying the benefit of our approach.

Go to article

Soft Computing Technologies In Design Of Fuzzy Controller For Active Vibration Isolation Systems, Inn-Tong Chiu, Chih-Chung Fang Jun 2016

Soft Computing Technologies In Design Of Fuzzy Controller For Active Vibration Isolation Systems, Inn-Tong Chiu, Chih-Chung Fang

Journal of Marine Science and Technology–Taiwan

In the paper, we develop a two-phase design approach for a fuzzy logic controller (FLC) of an active vibration isolation system, which adopts two components of soft computing techniques, namely fuzzy logic control theory and neural networks. First, we design a fuzzy logic controller for an active vibration isolation system using fuzzy logic control theory. We conduct numerical simulations of an active vibration isolation system with three kinds of exciting loads. The results indicate that the performance of the fuzzy logic controller is very good, but its control rule surface does not measure up in practical terms. Secondly in the …

Go to article

The Composite Design Of H?^?-Erl Sliding-Mode Controller, Shun-Min Wang, Zhi-Hao Chen, Cheng-Neng Hwang Jun 2016

The Composite Design Of H?^?-Erl Sliding-Mode Controller, Shun-Min Wang, Zhi-Hao Chen, Cheng-Neng Hwang

Journal of Marine Science and Technology–Taiwan

In a multi-input multi-output nonlinear system, because the system is subjected to the impacts of external disturbances and parametric uncertainties, its output response may not be able to satisfy the desired specification or even may make the system unstable. The H-ERL sliding mode controller proposed in this paper is motivated to solve these problems. This controller utilizes the concept of sliding mode controller with ERL (Exponential Reaching Law) as its major framework, and then uses Lyapunov stability theorem to ensure the closedloop stability when the system encounters prescribed external disturbances and parametric uncertainties. For the optimal selection of the adjustable …

Go to article

Applications Of Datum Marker Buoy Data To Search And Rescue Of Persons In Water, Chou-Tien Yao, Chen-Han Tsai, Hsiang-Hang Hsu Jun 2016

Applications Of Datum Marker Buoy Data To Search And Rescue Of Persons In Water, Chou-Tien Yao, Chen-Han Tsai, Hsiang-Hang Hsu

Journal of Marine Science and Technology–Taiwan

The seas around Taiwan have been ranked as posing a moderate risk to ocean-going activities because of heavy ocean traffic and severe weather conditions such as typhoons and monsoons. Taiwan’s Coast Guard responds to approximately 500 calls each year, and over 50% of its search and rescue missions involve persons in water (PIW). The drift of PIW at sea without propulsion is affected by ocean currents, wind, and wave actions. Therefore, having timely, reliable, and accurate environmental information, particularly regarding surface currents, is important to locate a drifting target. We examined the surface current data collected by Taiwan Coast Guard’s …

Go to article

Investigating Microstructures And High Temperature Superplasticity Behavior Of Mg-5(Mass%) Sn Alloy By Using Equal Channel Angular Extrusion, Hao-Jan Tsai, Chin-Guo Kuo, Chuen-Guang Chao, Tzeng-Feng Liu Jun 2016

Investigating Microstructures And High Temperature Superplasticity Behavior Of Mg-5(Mass%) Sn Alloy By Using Equal Channel Angular Extrusion, Hao-Jan Tsai, Chin-Guo Kuo, Chuen-Guang Chao, Tzeng-Feng Liu

Journal of Marine Science and Technology–Taiwan

In this study, we investigated the microstructures and high temperature plasticity behaviour of an Mg-5(mass%) Sn alloy after equal channel angular extrusion (ECAE). These results show that the grain boundary of the as-cast Mg-5(mass%) Sn alloy contained continuous eutectic ɑ-Mg+Mg2Sn precipitates. After an ECAE process, the average grain size decreased from 147 μm to about 10 μm and the continuous eutectic ɑ-Mg+ Mg2Sn particles were broken down, and those particles distributed uniformly. The maximum elongation was 550 % at high temperature 350C with strain rate of 1x10-3 s-1.

Go to article

Slope Stability Analysis Of Transient Seepage Under Extreme Climates: Case Study Of Typhoon Nari In 2001, Chia-Feng Hsu, Lien-Kwei Chien Jun 2016

Slope Stability Analysis Of Transient Seepage Under Extreme Climates: Case Study Of Typhoon Nari In 2001, Chia-Feng Hsu, Lien-Kwei Chien

Journal of Marine Science and Technology–Taiwan

The effects of climate change, the inherent fragility of geological structures in Taiwan, and questionable developmental practices have led to the occurrence of numerous slope disasters, most of which were triggered by the extreme rainfall associated with typhoons. Therefore, this study collected rainfall data associated with typhoons striking northern Taiwan over the last 17 years, as a follow up to estimating database of extreme rainfall events. Most previous investigations regarding the impact of storms on slope stability focused on solutions with conditions, such as static groundwater levels or steady pore pressure. Previous studies have used software STABL to analyze slope …

Go to article

Labview-Based Remote Real-Time Evaluation System For Motor Winding Machines, Jia-Sheng Hu, Chien-Chu Yeh, Ke-Han Su, Chao-Jen Chen, Ming-Yang Cheng Jun 2016

Labview-Based Remote Real-Time Evaluation System For Motor Winding Machines, Jia-Sheng Hu, Chien-Chu Yeh, Ke-Han Su, Chao-Jen Chen, Ming-Yang Cheng

Journal of Marine Science and Technology–Taiwan

This paper proposes the design and evaluation methodologies for a remote human-machine interface (HMI) system for motor winding machines. An electric motor with an interior rotor evaluates the system performance. The motor winding machine has a 3 degree-of-freedom motion space controlled by a motion control kernel: IMP-2. Real-time data of the motor winding status is crucial for ensuring quality and reliability and detecting malfunction, which facilitates the development and control of mass production of electric motors. Hence, a realtime monitoring interface is essential. This paper presents a LabVIEW-based HMI, which transfers the winding statuses of a winding machine to remote …

Go to article

Unbalanced Load Compensation In Three-Phase Power System With A Current-Regulated Dstatcom Based On Multilevel Converter, Wei-Neng Chang, Ching-Huan Liao, Po-Li Wang Jun 2016

Unbalanced Load Compensation In Three-Phase Power System With A Current-Regulated Dstatcom Based On Multilevel Converter, Wei-Neng Chang, Ching-Huan Liao, Po-Li Wang

Journal of Marine Science and Technology–Taiwan

In this paper, a current-regulated distribution-level static synchronous compensator (DSTATCOM) is proposed for real-time unbalanced load compensation in three-phase electric power distribution systems. The main circuit of the DSTATCOM uses multilevel cascade full H-bridge converter with delta-connected configuration, which is suitable for high-voltage, high-power applications. The compensation algorithm of the DSTATCOM is derived in the phasor domain. Preliminary verification of the DSTATCOM is executed with MatLab/SimuLink program. Finally, a hardware prototype is built for testing. Experimental results confirm the effectiveness of the proposed DSTATCOM for real-time unbalanced load compensation.

Go to article

A Novel Method For Testing Lcd By Integrating Shorting Bar And Taguchi Doe Technologies, Jium-Ming Lin, Yuan-Jung Chiang Jun 2016

A Novel Method For Testing Lcd By Integrating Shorting Bar And Taguchi Doe Technologies, Jium-Ming Lin, Yuan-Jung Chiang

Journal of Marine Science and Technology–Taiwan

This paper proposes a novel LCD false defect detection method that involves integrating shorting-bar and Taguchi technologies. When both the gate and data lines of an LCD are activated using a shorting bar technique, and an illuminator is applied to the background panel, if all thin-film transistor (TFT) arrays are free of point defect failures, then the lights from the illuminator can penetrate the scanned pixels (i.e., a bright, complete image should appear on the display). Otherwise, there are defects in the TFT cells exhibiting dark patterns. In this study, the P-diagram of the Taguchi design of experiment method was …

Go to article

Predictions Of Stress-Strain Curve And Fatigue Life For Aisi 316 Stainless Steel In Cyclic Straining, Liang-Hsiung Chou, Yung-Chuan Chiou, Chia-Chin Wu, Ying- Jen Huang Jun 2016

Predictions Of Stress-Strain Curve And Fatigue Life For Aisi 316 Stainless Steel In Cyclic Straining, Liang-Hsiung Chou, Yung-Chuan Chiou, Chia-Chin Wu, Ying- Jen Huang

Journal of Marine Science and Technology–Taiwan

In this study, experimental observations have been performed to understand the cyclic stress-amplitude response, the cyclic hardening/softening characteristics and the cyclic fatigue properties of AISI 316 stainless steel. Based on the experimental observations, these results are found so that the tested AISI 316 stainless steel possesses cyclic hardening characteristics. The shape of the stable hysteresis loop is symmetrical in tension and compression. The Massing cyclic stress-strain behavior is obviously absent. For the case of the absence of the Massing behavior, the power-law type equation is successfully applied to simulate the shape of the stable hysteresis loop at all applied levels …

Go to article

The Hydrodynamic Characteristics Of An Inclined Submerged Porous Plate With Rock Filled Structure, Ching-Yun Yueh, Shih-Hsuan Chuang, Chih-Hao Su Jun 2016

The Hydrodynamic Characteristics Of An Inclined Submerged Porous Plate With Rock Filled Structure, Ching-Yun Yueh, Shih-Hsuan Chuang, Chih-Hao Su

Journal of Marine Science and Technology–Taiwan

In this paper, we investigate the hydrodynamic efficiency of normal incident waves interacting with an absorbing system. The wave absorbing system consists of a submerged permeable structure filled with rock, a solid back wall, and a submerged horizontal or slightly inclined porous plate. Using a linear wave theory assumption, a multi-domain BEM (MBEM) model was created to calculate and discuss the reflection coefficients, free surface wave profiles, total wave force on the solid wall, and the horizontal and uplift forces acting on the porous plate of the water waves from several properties of the breakwater. The numerical model was calibrated …

Go to article

First Prev Next Last