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Articles 22591 - 22620 of 27412

Full-Text Articles in Engineering

Fuel Saving Strategy In Spark Ignition Engine Using Fuzzy Logic Engine Torque Control, Aris Triwiyatno, Sumardi Sumardi Apr 2012

Fuel Saving Strategy In Spark Ignition Engine Using Fuzzy Logic Engine Torque Control, Aris Triwiyatno, Sumardi Sumardi

Makara Journal of Technology

In the case of injection gasoline engine, or better known as spark ignition engines, an effort to improve engine performance as well as to reduce fuel consumption is a fairly complex problem. Generally, engine performance improvement efforts will lead to increase in fuel consumption. However, this problem can be solved by implementing engine torque control based on intelligent regulation such as the fuzzy logic inference system. In this study, fuzzy logic engine torque regulation is used to control the throttle position entered by the driver to achieve optimal engine torque. An engine torque vs. throttle position and engine speed mapping …

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An Agri-Food Supply Chain Model To Enhance The Business Skills Of Small-Scale Farmers Using Corporate Social Responsibility, Wahyudi Sutopo, Muh. Hisjam, Yuniaristanto Yuniaristanto Apr 2012

An Agri-Food Supply Chain Model To Enhance The Business Skills Of Small-Scale Farmers Using Corporate Social Responsibility, Wahyudi Sutopo, Muh. Hisjam, Yuniaristanto Yuniaristanto

Makara Journal of Technology

In general, small-scale vegetable farmers experience problems in improving the safety and quality of vegetables for supplying high-class consumers in modern retailers. Farmer Group and/or Cooperative (FGC) should be able to assist its members to meet the relevant provisions of modern retail on product specifications, delivery terms, and internal business requirements. This study proposed an agri-food supply chain (ASC) model that involves the corporate social responsibility (CSR) activities to enhance the business skills of the FGC as supplier of modern retailer. Multi-objective optimization programming is developed to determine the amount and timing of supply, level of farmers training skills, quality …

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Pineapple Liquid Waste As Nata De Pina Raw Material, Agus Sutanto Apr 2012

Pineapple Liquid Waste As Nata De Pina Raw Material, Agus Sutanto

Makara Journal of Technology

This research aims to study the quantity, quality, ecological and economic feasibility of nata de pina production (NP) from pineapple liquid waste (PLW). The design of the study employs complete random design (CRD) with three treatments: PLW without nutrients addition (A), PLW nutrients addition (B), and PLW stored for six months with nutrients addition (C). The nata de pina’s production factors measured were weight, thickness, fiber content, color, brightness, and residual waste. The highest weight was reached in treatment B (899 grams), followed by treatment A (616.4 grams), and C (477.8 grams). The thickness of NP of the height and …

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Modeling Of A New Structure Of Precision Air Conditioning System Using Secondary Condenser For Rh Regulation, Aries Subiantoro, Nasruddin Nasruddin, Feri Yusivar, Muhammad Idrus Al-Hamid, Bagio Budiardjo Apr 2012

Modeling Of A New Structure Of Precision Air Conditioning System Using Secondary Condenser For Rh Regulation, Aries Subiantoro, Nasruddin Nasruddin, Feri Yusivar, Muhammad Idrus Al-Hamid, Bagio Budiardjo

Makara Journal of Technology

A dynamic mathematical model for a new structure of precision air conditioning (PAC) has been developed. The proposed PAC uses an additional secondary condenser for relative humidity regulation compared to a basic refrigeration system. The work mechanism for this system and a vapour-compression cycle process of the system are illustrated using psychrometric chart and pressure-enthalpy diagram. A non-linear system model is derived based on the conservation of mass and energy balance principles and then linearized at steady state operating point for developing a 8th-order state space model suited for multivariable controller design. The quality of linearized model is analyzed in …

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Table Of Contents Mar 2012

Table Of Contents

Journal of Digital Forensics, Security and Law

No abstract provided.

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Bs News March/April Mar 2012

Bs News March/April

Building Services Engineering

No abstract provided.

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Electrocatalytic Study Of Pseudomonas Aeruginosa Bte-1 Strain, Ping Zhou, En-Ren Zhang, Li Zhou, Guo-Wang Diao, Jun-Le Niu Feb 2012

Electrocatalytic Study Of Pseudomonas Aeruginosa Bte-1 Strain, Ping Zhou, En-Ren Zhang, Li Zhou, Guo-Wang Diao, Jun-Le Niu

Journal of Electrochemistry

The aim of the present study is to investigate the electrocatalytic activity of electricity-producing Pseudomonas aeruginosa BTE-1 strain under anaerobic conditions. Pseudomonas aeruginosa BTE-1 was inoculated into anaerobic three-electrode electrochemical cells, and the electrocatalytic activity was measured at poised potentials. HPLC and cyclic voltammetry were used to detect potential electron mediators in solutions. Experimental results showed that no detectable pyocyanine was excreted by P. aeruginosa BTE-1 strain in the anaerobic electrochemcial cells, and P. aeruginosa BTE-1 exhibited direct electrocatalytic activity through the formation of biofilm on the electrode surface which was induced by the electron transfer from the cells of …

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Preparation And Electrochemical Performance Of Lifepo4/C By Spray Drying Method Assisted With Organic Template, Quan-Bing Liu, Yang-Mei Jiang, Hui-Yu Song, Shi-Jun Liao Feb 2012

Preparation And Electrochemical Performance Of Lifepo4/C By Spray Drying Method Assisted With Organic Template, Quan-Bing Liu, Yang-Mei Jiang, Hui-Yu Song, Shi-Jun Liao

Journal of Electrochemistry

In this work, the LiFePO4/C composites were prepared by the spray drying and carbothermal method, and were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge-discharge measurements. The effects of the organic assisted templates on the morphologies and electrochemical properties of the LiFePO4/C composites were investigated. The results showed that the morphology and microstructure of the composites could be tuned by incorporating with the different templates. The morphology of the composite appeared to be solid microspheres if no organic template was added, while porous microspheres, nest-like …

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Synthesis And Electrochemical Performance Of Xlifepo4·Yli3V2(Po4)3 Composites, Ping-Ping Ma, Zhi-Jian Liu, Jian-Hua Xia, Yu Chen, Pu Hu, Zhi-Chao Lu, Ding-Guo Xia Feb 2012

Synthesis And Electrochemical Performance Of Xlifepo4·Yli3V2(Po4)3 Composites, Ping-Ping Ma, Zhi-Jian Liu, Jian-Hua Xia, Yu Chen, Pu Hu, Zhi-Chao Lu, Ding-Guo Xia

Journal of Electrochemistry

A series of xLiFePO4·yLi3V2(PO4)3 composites were systematically synthesized through solid state reactions by variations in the proportions of LiFePO4 and Li3V2(PO4)3. The properties of the prepared compounds were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical measurements. The capacity of 162.7 mAh/g at 0.2 C rate was obtained with the relatively good cycle stability and good conductivity for 0.95LiFePO4·0.05Li3V2(PO4)3 due to more uniformed distributed and smaller particle sizes.

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Preparation And Characterization Of Mno/Tin Anode For Lithium Ion Batteries, Gao-Jie Xu, Hai-Yan Yang, Peng-Xian Han, Li-Xue Zhang, Ke-Jun Zhang, Chuan-Jian Zhang, Yu-Hua Fan, Cai-Feng Bi, Guang-Lei Cui Feb 2012

Preparation And Characterization Of Mno/Tin Anode For Lithium Ion Batteries, Gao-Jie Xu, Hai-Yan Yang, Peng-Xian Han, Li-Xue Zhang, Ke-Jun Zhang, Chuan-Jian Zhang, Yu-Hua Fan, Cai-Feng Bi, Guang-Lei Cui

Journal of Electrochemistry

Manganese titanate (MnTiO3) powder was prepared via a sol-gel method using manganese acetate and tetrabutyl titanate as raw materials, and citric acid as a chelating agent. Through high temperature nitridation of MnTiO3 powder in ammonia, the MnO/TiN composite was obtained. The phase structure, composition and morphology of the composites were characterized by XRD, SEM and EDS. The electrochemical properties of the composite electrodes were studied by performing cyclic voltammetry, galvanostatic charge and discharge, and electrochemical impedance spectroscopy tests. The MnO/TiN electrode delivered specific capacities of 394 mAh·g-1 and 146 mAh·g-1 at the current density of …

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Preparation And Hydrogen Evolution Properties Of Ni/Ag2O/Ruo2-Pt Cathodes, Shu Huang, Xue-Ming Li, Wu-Lin Li, Wen Wang Feb 2012

Preparation And Hydrogen Evolution Properties Of Ni/Ag2O/Ruo2-Pt Cathodes, Shu Huang, Xue-Ming Li, Wu-Lin Li, Wen Wang

Journal of Electrochemistry

The Ni/Ag2O/RuO2-Pt composite cathode was prepared by sol-gel method using RuCl3 and H2PtCl6 as raw materials. The effects of heat treatment conditions and AgNO3 concentrations on hydrogen evolution properties were investigated. The morphology and composition of Ni/Ag2O/RuO2-Pt composite cathode have been characterized by XRD, XPS and SEM-EDS. It is demonstrated that the surface structure of Ni/Ag2O/RuO2-Pt composite cathode is more compact, with fewer cracks and larger surface roughness than pure nickel. At the conditions of 0.3 A·cm-2, 90 oC, and …

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Progress And Perspective Of Fuel Cell Technology, Ming Hou, Bao-Lian Yi Feb 2012

Progress And Perspective Of Fuel Cell Technology, Ming Hou, Bao-Lian Yi

Journal of Electrochemistry

Fuel cell, a clean and high-efficiency electrochemical power source, has being paid much attention worldwide recent years. In this paper, the progress and perspective of fuel cell technology are elucidated in detail. Fuel cells have been applied in some special fields such as spacecraft, shuttle and submarines. However, in the areas of transportation, stationary station and portable power source, fuel cells are still under demonstration due to the durability and cost problems. The reliability and surrounding survivability of fuel cells should be enhanced in the special application. Meanwhile, the durability and cost of fuel cells are the main issues to …

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The Electrocatalytic Study Of Licoo2 In Air Electrode For Lithium-Air, Jun Gao, Wei Wu, Yan-Yan Tian, Yong Yang Feb 2012

The Electrocatalytic Study Of Licoo2 In Air Electrode For Lithium-Air, Jun Gao, Wei Wu, Yan-Yan Tian, Yong Yang

Journal of Electrochemistry

The LiCoO2 has been investigated as a new electrocatalyst for air electrodes using homemade lithium-air battery. The electrochemical performance and structural changes of the LiCoO2 based composite air electrodes have been studied. The results of CV, XRD and charge-discharge tests show that the composite air electrodes composed of LiCoO2 can greatly improve the discharge performance of lithium-air batteries. In particular when the composite air electrodes are charged to 4.1 V before further discharging, the obvious catalytic effects of LiCoO2 are attributed to higher valence state of the Co element in LiCoO2, esp. at charged …

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Dissolved Oxygen Seawater Battery With Electrochemical Capacitance, Hai-Bo Xu, Yong-Hong Lu, Wei Zhang, Yan-Ting Yu, Chuan-Wei Yan, Ya-Ping Sun, Lian Zhong, Jian-Guo Liu, Yi Zheng, Bing Han, Yong-Liang Wang Feb 2012

Dissolved Oxygen Seawater Battery With Electrochemical Capacitance, Hai-Bo Xu, Yong-Hong Lu, Wei Zhang, Yan-Ting Yu, Chuan-Wei Yan, Ya-Ping Sun, Lian Zhong, Jian-Guo Liu, Yi Zheng, Bing Han, Yong-Liang Wang

Journal of Electrochemistry

A new concept of seawater battery with electrochemical capacitance (SWB-EC) has been proposed using carbon fibre brush (CFB) as the cathode material, and three testing prototypes have been made accordingly. The discharge performances of the CFB before- and after-oxidation and Mg alloy sacrifice anode were studied by cyclic voltammetry and constant current discharge tests under steady state conditions. Results show that the oxidized CFB exhibits the pseudo-capacitive characteristic and its activity of oxygen reduction reaction (ORR) in stirred seawater highly increases, comparing with the non-oxidized CFB. The open circuit potential of Mg alloy sacrifice anode is -1.74 V, having the …

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Electrochemical Fabrication Of The Ordered Polyaniline Nanowires Array, Yan-Xin Gao, Li-Chao Sun, Su-Yuan Xie, Kang Shi Feb 2012

Electrochemical Fabrication Of The Ordered Polyaniline Nanowires Array, Yan-Xin Gao, Li-Chao Sun, Su-Yuan Xie, Kang Shi

Journal of Electrochemistry

The effects of electrochemical fabrication methods in different aniline concentrations on the morphologies of polyaniline, which was polymerized on the aligned-multi-walled carbon nanotubes electrode in H2SO4 or HClO4 electrolyte solution, were investigated. It was demonstrated that the polyaniline nanowires would not be prepared by cyclic voltammotry, whereas the nanowires could be obtained by the potentiostatic method without forming the ordered array. Only when the aniline concentration in HClO4 solution was high enough, the ordered polyaniline nanowires array could be fabricated by the constant current method.

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Simultaneous Determinations Of Ascorbic Acid, Dopamine And Uric Acid At Ca/Gc Electrode, Ying Zhang, Wang Ren, Min-Jiao Li Feb 2012

Simultaneous Determinations Of Ascorbic Acid, Dopamine And Uric Acid At Ca/Gc Electrode, Ying Zhang, Wang Ren, Min-Jiao Li

Journal of Electrochemistry

The citric acid modified glassy carbon electrode (CA/GC) was constructed by potentiostatic technique and used for simultaneous determinations of ascorbic acid (AA), dopamine (DA) and uric acid (UA) by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The CA/GC electrode exhibits excellent electrocatalytic activity towards AA, DA and UA. The oxidation peaks are well separated with the potential differences between AA and DA, DA and UA, and AA and UA being 170, 130 and 300 mV, respectively, which is large enough to determine AA, DA and UA simultaneously. The catalytic peak currents obtained were linearly dependent on the concentrations of …

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Cycle Lifetime Investigation Of Nickel Electrode Prepared By Electrochemical Impregnation For Applications In Aerospace Nickel Hydrogen Cells, Hai-Chang Zhang, Li-Xin Tan, Cheng Guo, Wen-Cheng Ming, Xue-Ying Ren Feb 2012

Cycle Lifetime Investigation Of Nickel Electrode Prepared By Electrochemical Impregnation For Applications In Aerospace Nickel Hydrogen Cells, Hai-Chang Zhang, Li-Xin Tan, Cheng Guo, Wen-Cheng Ming, Xue-Ying Ren

Journal of Electrochemistry

In this paper, the effects of overcharge, charge-discharge C rate and pore size on cycle lifetime of 4.5’ electrochemical impregnated nickel electrode were investigated. In the case of the electrode was overcharged to 170% of nominal capacity, the initial capacity of the electrode could be maintained 2.7 Ah up to 150 cycles without deterioration and a discharge capacity of 1.7 Ah (remaining 63% of 2.7 Ah) could be delivered after 300 cycles. Without overcharge, more than 300 charge-discharge cycles could be realized without loss of capacity and a discharge capacity of electrode could be maintained about 76% of initial capacity …

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Ag Nanoparticles Self-Assembled Films On Iron Surface And Their Inhibition Properties, Zhe Zhang, Ming-Zi Jia, Le Ruan Feb 2012

Ag Nanoparticles Self-Assembled Films On Iron Surface And Their Inhibition Properties, Zhe Zhang, Ming-Zi Jia, Le Ruan

Journal of Electrochemistry

The Ag nanoparticles were prepared in aqueous solutions through a chemical reduction method and transferred from water phase to toluene phase with the protection of 1-dodecanethiol (DDT). The polished iron electrode was immersed in the DDT-protected metal nanoparticles toluene solutions to form DDT/Ag nanoparticles self-assembled mixed films. Electrochemical methods such as electrochemical impedance spectroscopy and polarization curve measurement were used to study the inhibition properties of the self-assembled films in the 0.5 mol·L-1 H2SO4 solution. The appearance of elements such as S and Ag from the XPS data identified the presences of DDT and Ag nanoparticles.

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The Art And Beauty Of Flight, Edmond Ing Huang Tan Feb 2012

The Art And Beauty Of Flight, Edmond Ing Huang Tan

The Hilltop Review

This picture nicely represents the art and gracefulness of flight with the beauty of sunset in a tranquil setting. In the picture is a powered paragliding, also known as paramotoring in the plains of Nebraska. The ability to fly both low and slow safely, the 'open' feel, the minimal equipment and maintenance costs, the portability, minimally regulated and requires no license are claimed to be this type of flying's greatest merits. Paramotors can be flown during any season of the year anywhere but not in high wind conditions which typically means at low Sun azimuths as shown in the picture …

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Wmu Sunseeker Solarcar, Edmond Ing Huang Tan Feb 2012

Wmu Sunseeker Solarcar, Edmond Ing Huang Tan

The Hilltop Review

This picture was taken, at the racetrack the evening before the start of the North American Solar Challenge 2008 race in Plano, Texas. In this picture is the Sunseeker, Western Michigan University’s solar powered car that will race in the 2 week long, 2400miles long race from Plano, Texas to Calgary, Canada. Sunseeker was the only car in that race that feature a 2 electric motor drive system than the standard one electric motor drive system. Western Michigan University Sunseeker team brought back the sportsmanship award that year.

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Microgas Turbine Engine Characteristics Using Biofuel, Edmond Ing Huang Tan, William W. Liou Feb 2012

Microgas Turbine Engine Characteristics Using Biofuel, Edmond Ing Huang Tan, William W. Liou

The Hilltop Review

Aviation fuels commonly used today are extracted from the kerosene fraction of the crude oil that is distilled between the gasoline and the diesel. Crude oil is not renewable and the world oil reserve is generally believed to be on the decline. In 2006, 6.3% of the world's refinery production was used for aviation fuel (Nygren et. al., 2009). At an estimated rate of 3% increase of fuel demand per year, aviation use alone will consume the world fuel production by 2026. Therefore, there is a need for the aviation industry to reduce its dependence on fossil fuels and, perhaps, …

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A Quasi-Orthogonal Correlator-Based Bpnn Pn Code Acquisition Scheme For Underwater Acoustic Dsss Communication, Jiang-Yao Chen, Shao-Wei Leu, Chin-Fen Lin, Shun-Hsyung Chang Feb 2012

A Quasi-Orthogonal Correlator-Based Bpnn Pn Code Acquisition Scheme For Underwater Acoustic Dsss Communication, Jiang-Yao Chen, Shao-Wei Leu, Chin-Fen Lin, Shun-Hsyung Chang

Journal of Marine Science and Technology–Taiwan

This paper proposes a quasi-orthogonal correlator-based back propagation neural network (BPNN) pseudo-noise (PN) code acquisition scheme for underwater acoustic direct sequence spread-spectrum (DSSS) communication. The main idea is to use short-length quasi-orthogonal correlators for coarse phase estimation and a BPNN based discriminator for fine phase calculation. When compared with other neuralnet based PN code acquisition schemes, the short quasiorthogonal correlators effectively locate possible phases of the received signal with high tolerance to interference and require no full-length correlation. These capabilities have been verified by extensive computer simulations and the results clearly show that the proposed scheme has the characteristics that …

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Customer Relationship Management And Firm Performance: An Empirical Study Of Freight Forwarder Services, Kuo-Chung Shang, Chin-Shan Lu Feb 2012

Customer Relationship Management And Firm Performance: An Empirical Study Of Freight Forwarder Services, Kuo-Chung Shang, Chin-Shan Lu

Journal of Marine Science and Technology–Taiwan

This study empirically identifies customer relationship management (CRM) and examines its impacts on firm performance in the context of freight forwarder services. Using data collected from a survey of 144 freight forwarding firms in Taiwan, a structural equation modeling exercise was conducted to identify crucial CRM dimensions and their influences on the perceived financial performance. Results indicated that CRM dimensions such as customer response and profit interaction are found to have significantly positive effects on the perceived financial performance aspects of profit and growth rate. This research not only investigates crucial CRM but also proposes a model for empirical studies …

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The Relationship Between Accelerated Migration Time In Acmt And Ponding Time In Ponding Test For Cement-Based Materials, Yu-Sheng Chen, Ming-Chih Li, Yi-Wen Chan, Chung-Chia Yang Feb 2012

The Relationship Between Accelerated Migration Time In Acmt And Ponding Time In Ponding Test For Cement-Based Materials, Yu-Sheng Chen, Ming-Chih Li, Yi-Wen Chan, Chung-Chia Yang

Journal of Marine Science and Technology–Taiwan

The salt ponding test has been widely used in recent year to evaluate the durability of cement-based materials. However, the duration of more than 90 days salt ponding is considered as time-consuming. In this study, the electrochemical technique (ACMT; Accelerated Chloride Migration Test) is applied to accelerate the movement of chloride ion in the cement-based materials to reduce the duration of testing time. The chloride profiles are obtained from ponding test with various ponding times and ACMT with different accelerated migration times. The total amount of chloride in specimens are calculated from the profiles and compared. Based on the total …

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Transient Response Of Sloshing Fluid In A Three Dimensional Tank, Chih-Hua Wu, Bang-Fuh Chen Feb 2012

Transient Response Of Sloshing Fluid In A Three Dimensional Tank, Chih-Hua Wu, Bang-Fuh Chen

Journal of Marine Science and Technology–Taiwan

Sloshing waves in moving tanks have been studied numerically, theoretically and experimentally in the past several decades. Most reported studies have been for tanks excited by forcing motion in a limited number of directions and with fixed excitation frequencies throughout the forcing. In the present study, a time-independent finite difference method is used to simulate fluid sloshing in the three-dimensional tanks with arbitrary depths and the tanks are subject to a range of excitation frequencies with motions that exhibit multiple degrees of freedom. The developed numerical scheme is verified by rigorous benchmark tests, and the advantage and efficiency of the …

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Multiple Scattering Of Sh Waves By An Embedded Truncated Circular Cavity, Deng-How Tsaur, Kao-Hao Chang Feb 2012

Multiple Scattering Of Sh Waves By An Embedded Truncated Circular Cavity, Deng-How Tsaur, Kao-Hao Chang

Journal of Marine Science and Technology–Taiwan

The region-matching technique is implemented to derive a series solution to the SH-wave scattering problem of an embedded truncated circular cavity. An introduced auxiliary boundary partitions the whole analyzed region into two subregions, whose displacement fields are expressed as a superposition of appropriate wavefunctions. Taking advantage of the method of images, the zero-stress boundary condition on the horizontal ground surface is satisfied automatically. Suitable Graf’s addition formulas facilitate the enforcement of boundary conditions on the artificial interface and curved cavity surface for determining the expansion coefficients. Effects of several parameters on steady-state surface motions are discussed. Transient changes in underground …

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Ultimate Load-Bearing Capacity Of Self-Anchored Suspension Bridges, Chin-Sheng Kao, Chang-Huan Kou, Wen-Liang Qiu, Jeng-Lin Tsai Feb 2012

Ultimate Load-Bearing Capacity Of Self-Anchored Suspension Bridges, Chin-Sheng Kao, Chang-Huan Kou, Wen-Liang Qiu, Jeng-Lin Tsai

Journal of Marine Science and Technology–Taiwan

This paper presents a method of reduced stiffness coupled with step increments to simulate the nonlinear problem that occurs when a material is in the elasto-plastic stage. A set of equations was developed and used to analyze the ultimate loadbearing capacity and the failure process of a self-anchored suspension bridge. Also investigated here were the effects on the load-bearing capacity due to variations in the strength and stiffness of the four substructures and due to broken hangers. The results showed that variations in the material strength and the structural stiffness of the substructures can lead to different degrees of influence …

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Numerical Study On Significance Of Wind Action On 2-D Freak Waves With Different Parameters, Shiqiang Yan, Qingwei Ma Feb 2012

Numerical Study On Significance Of Wind Action On 2-D Freak Waves With Different Parameters, Shiqiang Yan, Qingwei Ma

Journal of Marine Science and Technology–Taiwan

This paper presents a numerical study on how the significance of wind action differs when varying the wave parameters. The quasi arbitrary Lagrangian-Eulerian finite element method (QALE-FEM) is used for this purpose. An improved model for wind-excited pressure and wind-driven current, which is recently developed by the authors of this paper [27], is coupled with the QALE-FEM. Many cases involving freak waves with different focusing time/point and frequency ranges under the action of winds are investigated. The results show that the significance of wind actions on freak waves strongly depends on the focusing time, the focusing point and the frequency …

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Research On Optimization Of Hull Lines For Minimum Resistance Based On Rankine Source Method, Bao-Ji Zhang Feb 2012

Research On Optimization Of Hull Lines For Minimum Resistance Based On Rankine Source Method, Bao-Ji Zhang

Journal of Marine Science and Technology–Taiwan

In order to obtain the hull form with the excellent resistance performance, the optimal design program of hull lines with the independent intellectual property is developed. An optimal design method is proposed based on the minimum total resistance and on NGA, SGA and NLP. The fore-body is optimized with total resistance as the objective function, (in which total resistance can be expressed as sum of wave resistance and friction resistance), with the parameter of hull form modification function as design variables, with an appropriate displacement as a constraint. At last, the numerical optimization examples for s60 ships are provided, which …

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Fuzzy Decision On Optimal Collision Avoidance Measures For Ships In Vessel Traffic Service, Chien-Min Su, Ki-Yin Chang, Chih-Yung Cheng Feb 2012

Fuzzy Decision On Optimal Collision Avoidance Measures For Ships In Vessel Traffic Service, Chien-Min Su, Ki-Yin Chang, Chih-Yung Cheng

Journal of Marine Science and Technology–Taiwan

This article proposes a new collision avoidance decision method for ships, allowing ships at risk of collision to take timely collision avoidance measures to ensure safe passage. Through vessel traffic service (VTS) collision alert system, an analysis can be made for the probability of a ship collision and an early warning can be issued. For ships in potential collision danger, the proposed method will use Microsoft Visual Studio to establish a knowledge base of international regulations for preventing collisions at sea. Thus, based on an analysis of the situation when encountering other ships, the knowledge base will suggest an appropriate …

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