bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Development of Circular Economy in Resource-Based City
Authors: Li Ru , Gong Xuan
Published: August 2013

In this study the relationship between cleaner production and circular economy was investigated, including discusses necessity and significance of developing circular economy as a whole and recommends feasible countermeasures for developing circular economy. Efficient theoretical basis for creating a sustainable developing road in resource-based city was established and the objective of this study is to develop a best way for implementing Cleaner Production in heavy industry city through analyzing industrial layout, industrial structure and economic development size in Fushun.
Assessment of Heavy Metal Levels in Sediment of the Xiangjiang River Section Flowing through Changsha
Authors: Wu Fang Tong , Zhu Hong Yu , Guo Juan , Lei Yan Ni
Published: August 2013

In order to assess polluting condition of heavy metals in sediment of the Xiangjiang River Changsha section, the spatial distribution of four heavy metals were determined in river sediments at six sampling stations. Geo-accumulation Index of heavy metals in superficial sediment of the Xiangjiang River Changsha section was in the decreasing order of Cd>Zn>Pb>Cu. On the whole, the pollution level was moderate-high, and the order of four heavy metals pollution lever was noted in the sequence of Liuyang River entrance of Xiangjiang> Juzizhou Bridge >Houzishi Bridge> the Second Xiangjiang River Bridge > Xiangjiang Super Bridge > Xiangjiang Sanchaji Bridge. The Potential Ecological Risk Evaluation showed that heavy metals ecological risk in sediment of the Xiangjiang River Changsha section was very high, Cd was the primary contribution element, followed by Pb.
Wastewater Containing Copper Precipitation Research
Authors: Wang Yu Heng , Gu Jin Chuan , Lin Wei Lan , Wang Wen Yuan
Published: August 2013

With copper wastewater as the research object, in sulfide - flocculation process, a comparative study of its wastewater treatment of copper sulfide dosage, type of flocculation, flocculation dosage, stirring time and other conditions. The results show that: in their respective optimum conditions, the flocculation PAC than PFS to pH adaptability, low dosage, copper removal rate reached 97.7%, the reaction solution pH value of 6.5, to achieve "Integrated Wastewater Discharge Standard" (GB8978-1996) emission standards.
The Economized Design of Modern Indoor House
Authors: Guo Lin Sen , Xu Jing
Published: August 2013

This thesis precisely points out the current situation of our country and the existing problems in the design of indoor house and focuses on the illustration that the consciousness of ecology, energy saving and economic benefit must be carried when dealing with the indoor design of modern house and the strategy of economized design should be adopted, which thus can improve the environmental quality of housing and keep identical with the strategic demand of our countrys sustainable development.
A Study on Light Trespass of Dynamic LED Advertising Sign Flickering on Adjacent Residents at Night
Authors: Ho Chen Ying , Lin Hsien Te , Huang Kuang Yu
Published: August 2013

Nowadays, with the growing popularity of dynamic LED advertising signs, the light trespass caused by these signs is being taken more and more seriously. This study analyzes experimentally how various flickering cycles affect the visual fatigue of residents who read in the room adjacent to these signs. According to the results of the research, an increase in the flickering cycle of the sign corresponds with a decrease in the degree of disturbance to adjacent residents. Moreover this study suggests that the flickering cycle of a dynamic LED advertising sign should be set above four seconds to ensure minimal discomfort.
Construction Ventilation Scheme Optimization of Underground Main Powerhouse Based on CFD
Authors: Liu Zhen , Wang Xiao Ling , Zhang Ai Li
Published: August 2013

For the purpose of avoiding the deficiency of the traditional construction ventilation, the ventilation of the underground main powerhouse is simulated by the computational fluid dynamics (CFD) to optimize ventilation parameters. A 3D unsteady RNG k-ε model is performed for construction ventilation in the underground main powerhouse. The air-flow field and CO diffusion in the main powerhouse are simulated and analyzed. The two construction ventilation schemes are modelled for the main powerhouse. The optimized ventilation scheme is obtained by comparing the air volume and pressure distributions of the different ventilation schemes.
Exploration for Greenbelt Distribution and Oxygen Diffusion of Courtyard Space – Cite Shenyang Jianzhu University as Example
Authors: Sun Jia Lin , Pan Xu Wen , Jiang Hua
Published: August 2013

This paper summarizes the diffusion mechanism and relevant research method of oxygen which is diffused from courtyard greenbelt with the action of wind. This paper dynamically simulates the oxygen condition of courtyard space by the method of CFD. According to the simulation results, researchers make triaxial quantitative analysis for greenbelt distribution, oxygen diffusion and concentration distribution of courtyard space. Finally, this paper summarizes the basic law of oxygen diffusion influenced by greenbelt distribution of courtyard and puts forward some design strategies of greenbelt which is in favor of oxygen diffusion and oxygen environment of courtyard.
Research on the Green Urban Morphology Based on BIM - A Case Study on the Urban Design in Nanhe City
Authors: Shu Ping , Xu Jun , Wang Li Jun
Published: August 2013

Based on theoretical studies of the urban spatial morphology, this paper introduces advanced concepts and methods of BIM (Building Information Model) into the urban design in Nanhe City ,and then respectively makes innovations of the urban design practice supported by BIM technology in the process of design, optimization and implementation of the program, attempting to explore BIM-based design patterns of the urban spatial morphology to make the traditional urban design process more rational and scientific, to expect to reach the green and sustainable urban spatial morphology.
On Experimental Study of Development Calcined Gypsum from Flue Gas Desulfurization by Microwave Technology
Authors: Zhao Zhi Man , Wang Chun Jie , Li Can Qion , Zhang Xiao Mei
Published: August 2013

Flue gas desulfurization gypsum (FGD gypsum) was irradiated with microwave, it could be changed calcined gypsum from flue gas desulfurization (CGD). The microwave respectively irradiated five groups FGD gypsum at 100-110°C, 110-120°C, 120-130°C, 130-140°C and 140-150°C, then the fineness and setting time were respectively measured, and compressive/flexural strength were also determined after 2 hours. Experiments show that, CaSO4·0.5H2O crystal of CGD would be more quantity and bigger volume with irradiation temperature increasing. The reason was considered that there were special effect of microwave irradiation to calcium sulfate crystalsthat by scanning electron microscope, and found the Ca, S, O and other elements in cylindrical crystal by Edax. The formation mechanism of CaSO4·0.5H2O crystal by microwave irradiation is different from traditional CaSO4·0.5H2O crystal formation theories.
Optimal Formulation of Recycled Polypropylene/Rubberwood Flour Composites on Hardness Property
Authors: Homkhiew Chatree , Ratanawilai Thanate , Thongruang Wiriya
Published: August 2013

Mixture experimental design was applied to determine the optimal mixture for composites between rubberwood flour (RWF) and recycled polypropylene (rPP). Experiments were conducted based on a D-optimal mixture design and analyzed using response surface methodology. Analysis of variance revealed that compositions including rPP, RWF, maleic anhydride grafted polypropylene (MAPP), and ultraviolet (UV) stabilizer significantly affected hardness property. Contour plots of the response surface demonstrated that an increase of RWF content steadily enhanced hardness value, but hardness property sharply decreased with an increase of rPP loading. An addition of the UV stabilizer in the composites showed a slight decrease of the hardness value. This result recommends that amount of UV stabilizer used should be minimized. With this experimental design, the optimal formulation of rPP/RWF composites found was 50.0 wt% rPP, 45.0 wt% RWF, 3.9 wt% MAPP, 0.1 wt% UV stabilizer, and 1.0 wt% Lubricant.
Study on Chromium Sorption from Wastewater Using Activated Carbon Loaded Metal
Authors: Wei Chun Mei , Gu Jin Chuan , Ge Yong Sheng
Published: August 2013

The advance of research on activated carbon loaded metal at home and abroad was depicted. The method and character of activated carbon loaded metal was also investigated systematically. Based on the sorption mechanism, it was briefly introduced that application on removal chromium from wastewater using modified activated carbon. Finally, the work pointed the exist problems that is how to reduce cost and optimize process, how to regenerate and reuse activated carbon, and how to increase utilization activated carbon.
The Kinetics Mechanism Analysis of Sulfur Depositions in High Sulfur Content Gas Reservoirs
Authors: Lei Deng Sheng , Fu De Kui
Published: August 2013

The origin of particles which lead to reservoir damage in oil industry mainly includes internal generation and external invasion. The particles generated in reservoir include clays, mineral particles, deposits and particles which are separated out in physical and chemical effects. Particles of external invasion include invasions in the process of drillings and fracturing operations, particles in work-over operation and completion fluid operation, or debris which are carried by injection fluid (water, chemicals, etc.). The force of the particles has affected the seepage law in high sulfur gas reservoir. By analysis of the particle migration, sedimentary characteristics, and the force situation of sulfur particles, we will discuss dynamical mechanisms of sulfur deposition.
The Research Progress of Biosyufactants on the Degradation of Antibiotics during the Compost Process
Authors: Zhao Yun Long , Chen Su , Sun Li Na , Jin Lan Shu , Chao Lei
Published: August 2013

In recent years, the environmental impact of antibiotic pollution from animal manure has gradually become the focus of attention. The compost is a common method for degradation of antibiotics, the rapid degradation of antibiotics can be achieved by adjusting the different compost conditions. Biosurfactants caused all the attention as a new class of surfactants, biosurfactants used in compost will have an impact on the degradation of antibiotics in livestock and poultry manure.
Stochastic Assessment for Chloride Penetration in Reinforced Concrete Structures under Corrosive Environments
Authors: Zhang Xiao Gang , Zhou Tian Hai , Li Min Hui , Wang Xiao Ping
Published: August 2013

In the paper, the improved coupling convection and diffusion model of chloride ion penetration in reinforced concrete (RC) structures under corrosive environments is presented, in which many major influence factors such as environmental temperature and relative humidity, water ratio of concrete, and stress state etc are considered. Based on Fourth-Moment stochastic simulation theory, the estimation of the depassivation probability of reinforcement in corrosive RC is analyzed. And many important conclusions on depassivation of reinforcement is gained, which will be useful for repair, rehabilitation, and replacement of RC structures in corrosive environments.
A Study of Liquefaction Resistance of Composite Foundation of CFG and Stone Columns
Authors: Zhang Chun Mei , Huang Chao , Zhi Guan Peng
Published: August 2013

Liquefaction of saturated sands remains an important topic in Geotechnical earthquake engineering. Amongst various review measures available,the use of CFG Column and stone columns Composite foundation to prevent liquefaction can achieves good results. In this paper, a detailed review on effectiveness of densification, drainage and reinforcement of CFG column and stone columns Composite foundation for the resistance of soil liquefaction during earthquakes is presented.
Effect of Nitrite Ions on Polarization Behavior of Steel Immersed in Simulated Concrete Pore Environments
Authors: Cao Zhong Lu , Hibino Makoto , Goda Hiroki
Published: August 2013

The influence of nitrite concentration on the linear polarization curves of steel, Tafel slope and Stern-Geary constant B have been investigated in three different pH environments simulating the highly alkaline environment, carbonated environment and neutral environment that really existed on the surface of steel in concrete. The results indicate that when the steel is in passive state, the presence of nitrite has little influence on anodic/cathodic polarization curves and Stern-Geary constant B; but when the steel is corroded, the presence of nitrite not only reduces the current density of anodic polarization curve but also decreases the value of Stern-Geary constant B. If this influence is not considered in practical corrosion measurement, the corrosion current will be overestimated.
Research on Application of Environmental Protection Type of Blowing Agent in Polyurethane Insulation Material
Authors: Yang Liang , Zhuang Shuang , Chen Yan Fei
Published: August 2013

In this paper the environment protection type blowing agent replacement process had been briefly introduced. Experimental study had been conducted on the burning and thermal insulation performance of the traditional CFC-11 (Freon) and typical environment-friendly blowing agent, and the influence rules of density and gas phase thermal conductivity on the main performance were obtained
Shear Strength of Concrete and Gypsum Composite Walls
Authors: Liu Kang
Published: August 2013

Gypsum walls are a green product that helps to save energy and protect the environment. This paper investigates the shear strength of glass fiber reinforced gypsum (GFRG) walls fully or partially filled with concrete in the hollow cores. Eight full scale GFRG walls were tested. The shear performance of the tested walls, including the shear failure mode, hysteresis responses, the ultimate shear strength were studied in the paper. A design procedure for the shear strength of the concrete filled GFRG walls is developed.
Study on Characteristics and Usage of Japanese Landscape Paving Materials
Authors: Geng Xin , Chen Ke Shi , Gao Ruo Fei , Jin Shan
Published: August 2013

This study visited Japanese landscape construction practices and divided paving into 4 categories: smooth paving, brick paving, permeable paving and wooden paving. We try to summarize characteristics of each type and analysis how to use them. Through Japan paving materials research attempts to find starting point of improving the quality of landscape construction, starting from the landscape materials, so as to promote the development of landscape industry.
Synthesis of Nickel Nanoparticles Encapsulated in a Hollow Silica Shell
Authors: Harada Takashi , Misaka Takuji , Sakata Takao , Ikeda Shigeru , Matsumura Michio
Published: August 2013

A core-hollow shell composite composed of a nickel (Ni) nanoparticle core encapsulated in a hollow silica shell (Ni@SiO2) was prepared by using a nanocrystalline salt of nickel tris-hydrazine complex, which acted as not only a nickel source but also a solid template to produce the core-hollow shell structure. Structural characterizations using TEM and N2adsorption-desorption measurements of the thus-obtained Ni@SiO2powder revealed that it was composed of a Ni nanoparticle core of ca. 4.0 nm in diameter and a rectangular-shaped hollow silica shell with a micropore (ca. 0.5 nm in diameter) system.
Mechanical Properties of Sprayable Fiber Reinforced Strain-Hardening Cement Composite (SHCC)
Authors: Yu Zhong Jie , Lee Mi Hwa , Yun Hyun Do
Published: August 2013

The use of strain-hardening cement composite (SHCC), which exhibits metal-like deformation behavior and has ability to restrict crack opening, as a retrofit material for seismic retrofitting of existing infrastructures, has been the subject of high expectations. In this work, Three SHCC mixtures including different chemical or mineral admixtures were prepared and evaluated based on the mechanical properties, such as flow, sprayability, compressive and uniaxial tensile performances. All SHCC mixtures were reinforced with polyvinyl alcohol (PVA) fibers at volume fraction of 2.2%. Mechanical properties of each SHCC mixture were measured and evaluated after mixing, pumping, and shotcreting. Experimental results indicated that the compressive strength and elastic modulus of three SHCC mixtures increased almost linearly according to shotcreting procedure from mixer to nozzle. And the uniaxial tensile of SHCC mixture (SHCC-AE) with AE agent was superior to the other SHCC mixtures (SHCC-MC and-N).
Mechanical Properties of High Strength Concrete Using Mineral Admixtures
Authors: Park Wan Shin , Kim Jeong Eun , Eom Nam Yong , Kim Sun Woong , Kim Do Gyeum , Cho Myung Sug
Published: August 2013

This paper reports an investigation in which the performance of fly ash, blast furnace slag and silica fume high strength concretes were studied under 7 and 28 curing days. Three high strength concrete mixtures were made in this investigation. Mixtures containing 25% fly ash, 25% fly ash and 25% blast furnace slag, and 5% silica fume as cement replacement, respectively. The water-binder ratio of all the high strength concrete mixtures was kept constant at 0.34. The replacement of silica fume in the high strength concrete mixtures indicated higher value of the compressive strength, splitting tensile and modulus of elasticity. In addition, blast furnace slag is effective for strength and modulus of elasticity improvement between 7 to 28 curing days.
Reliability Analysis of the Hydraulic Support Pin
Authors: Liu Dong Yu , Zou Dian Long , Zhang Yun Long , Fan Xun
Published: August 2013

This paper deduced the force formula of the pin through applying load on the top beam.Using the Hertz formula calculating the mean stress and standard deviation of the pin.By using the stress-strength interference theory to calculate the reliability of the pin.
The Method of Improving Precision of Micro Injection Molding Machine Temperature Control
Authors: Tang Sheng De , Xu Hong , Wu Da Ming , Zhang Ya Jun
Published: August 2013

the temperature control accuracy of polymer melt is the main factor affecting quality precision of final products. In this paper, we study the method of improving the precision of temperature control based on control system of micro injection molding machine. In order to avoid big overshoot in the traditional PID control, we use gradual approximation control method based on gradual approximation mathematical algorithm to realize fast and accurate temperature control of the micro injection molding machine. Experiment results show that effective combination of the traditional PID and gradual approximation method can realize accurate temperature control of micro injection molding machine, and precision of temperature control can be improved up to±0.5°C.
Characteristics of STS630 Based Metal Injection Molding Products on Powder Size, Sintering and Heat Treatment Conditions
Authors: Jeong Hee Jin , Yeo Hwan Kyun , Bae Dae Yeol , Kim Je Hyun , Kim Dong Woo , Kim Soung Jin
Published: August 2013

This study proposes the research method to examine through experiment the mechanical properties of final products based on the size and sintering temperature of powder particle during STS630 powder based metal injection molding and heat treatment processing condition after the sintering. The feedstock for the injection was manufactured based on STS630 powder with the diameter of 7.0±1.0μm and 8.0±1.0μm and the sintering was carried at 2 temperature conditions of 1300°C and 1355°C after the injection and debinding process. Heat treatment conditions of sample after the sintering were divided into 2 types thus final samples of total 8 cases were manufactured. Then, the 5 types of mechanical properties test were conducted. Optimal processing conditions for MIM molding and heat treatment of STS630 powder could be established based on it.
Effect of Drying on Physical Qualities and Sensory Evaluation of Herbal Germinated Brown Rice by Hot Air: Turmeric and Roselle
Authors: Sangchum Khwanruedi , Tirawanichakul Yutthana , Tirawanichakul Supawan
Published: August 2013

The object of this project was to study the effect of drying temperature on physical quality and sensory evaluation of germinated brown rice soaking with tumeric and roselle. The drying was run under the conditions of drying temperatures of 80-100°C and air velocity of 7.3 m/s. Initial moisture content of brown rice samples was of 54-55% dry-basis and was dried until the final moisture content reached to 20-25% dry-basis. After drying, the rice was tempered and then was ventilated by ambient air until its moisture content reached to 14-15% dry-basis. The experiment showed that highest drying rate is incident at 100°C. For physical qualities analysis, the results showed that the drying air temperature does not affect to head rice yield, fissured kernels, chalky grain and color (L*, a*, b* CIE-lab unit) of herbal germinated brown rice. In addition, herbal germinated brown rice drying can maintain low percentage of chalky grain compared to commercial brown rice. The soaking solution was not affect to drying rate. Finally, the sensory evaluation showed that the herbal germinated brown rice dried with all drying conditions was acceptable taste (>5).
Comparison of Wear on PEEK-PTFE and PPS-PTFE Radial Bearings under Rolling Contact Fatigue
Authors: Koike Hitonobu , Mizobe Koshiro , Oyama Shunsuke , Kashima Yuji , Kanemasu Kenji , Kida Katsuyuki
Published: August 2013

In this paper, the wear performance of polymer radial ball bearings (PEEK-PTFE and PPS-PTFE) were investigated. For effective operation of equipment in clean energy facilities environment, the polymer bearings were developed. These polymer bearings were produced by machining and their rolling contact fatigue (RCF) behavior under non-lubricated condition was carried out. PEEK accumulation layer with PTFE and graphite was formed on the bearing's inner ring under 3000 rpm high rotation speed. Due to the self-lubrication of PEEK layer, the wear loss of PEEK-PTFE bearing was lower than PPS-PTFE radial bearing. Moreover, it was found that the thin PEEK layer protected the raceway from the friction heat and wear. The wear durability of PEEK-PTFE bearing was superior to PPS-PTFE one.
Experimental Analysis of Tool Wear when Drilling Carbon Fibre Composite (CFC) without Cutting Fluid, with Cutting Fluid and with a Pre-Cryogenically Cooled Tool
Authors: Dahnel Aishah Najiah , Barnes Stuart , Bhudwannachai Pipat
Published: August 2013

Machining of Carbon Fibre Composites (CFCs) particularly drilling, is frequently employed in industry especially when dealing with joining, assembly and structural repair of the parts. However, the nature and heterogeneous structure of CFCs often results in rapid wear of the cutting tool. This research studied the relationship and compared the effect of drilling a CFC plaque without cutting fluid, with conventional cutting fluid and with cryogenic cooling at constant cutting speed of 94 m/min and feed rate of 0.065 mm/revolution using tungsten carbide twist drill. The conventional cutting fluid was supplied continuously to the drill and the CFC plaque during the drilling cycle; while for the cryogenic cooling tests, the drill tip was immersed in liquid nitrogen for 10 and 30 seconds prior to drilling the CFC. It was found that the tool wear increased with the increasing number of drilled holes at all machining conditions. After drilling of 325 holes, the largest tool wear observed was 181 μm which was produced when drilling the CFC plaque with conventional cutting fluid. The corresponding tool wear for drilling with cryogenic cooling was 164 μm and the smallest tool wear of 155 μm was observed during dry drilling. Dry drilling produced the smallest tool wear because the heat generated reduced the strength of the CFC, particularly polymer matrix. Therefore, this situation led to easier machining of CFC materials; consequently reduced the wear of the tool.
Effect of Anti-Soiling Coating on Performance of Fresnel Lens for Concentrator Photovoltaic Module
Authors: Hirohata Takuya , Ota Yasuyuki , Nishioka Kensuke
Published: August 2013

If the optical collector surfaces in concentrator photovoltaic (CPV) systems are soiled, a significant proportion of sunlight is scattered and definitively lost because the scattered rays cannot be focused onto the solar cell. In this study, we studied the influence of soiling on poly-methyl methacrylate (PMMA) substrates with and without super-hydrophilicity anti-soiling layer. After 5 months, the reduction rate of transmittance for the sample without anti-soiling coat was 7.1%. In contrast, that for the sample with anti-soiling coat could be suppressed to 4.2%. Moreover, the relationship between wind speed and accumulation of dust was discussed.
Solution of Working Space about the 4-DOF Parallel Mechanism by ADAMS
Authors: Zhang Rui Hua
Published: August 2013

This article is based on ADAMS software platform to solve working space of the 4-DOF parallel mechanism. Design a kind of 4-DOF parallel mechanism and establish virtual prototype on ADAMS software platform. Then through enumeration three branched chain parameters combination, even without the premise of kinematics positive solution, we can solve it working space using the forward solving method and get the branched chain parameter with the reference point position corresponding numerical relations. It greatly simplifies the solution of the working space of parallel mechanism, is more advantageous to parameter optimization and trajectory planning of parallel mechanism.
The Natural Characteristics of Fluid Conveying Pipe under Different Supporting Conditions
Authors: Bao Ri Dong
Published: August 2013

The natural characteristics of fluid conveying pipe with its ends under different supporting conditions were investigated. The expression of vertical vibration mode-function of pipe beam was derived from the boundary conditions of similarly supported beam. The effect of different supporting elastic coefficient, fluid pressure, flowrate, and axial force of pipe section on its natural characteristics was calculated and analyzed based on the eigenequation of motion. The numerical computation results showed that its natural frequency was proportional to elastic supporting coefficient and axially pressed force of pipe section, but was proportional conversely to fluid flowrate, fluid pressure and axially sectional drawn force of pipe. The natural frequency of different modes can be coupled with each other, the primarily mode and secondly mode would change either. In order to improve the natural frequency of fluid conveying pipe, the elastically constrained coefficients should be extended and the axially pressed force of pipe section should be avoided.
Study on Optimization of Vehicle Routing Problem with Multiple Vehicle Type and Vehicle Access Restricted Based on Genetic Algorithm
Authors: Chen Kai , Lang Mao Xiang
Published: August 2013

In many cities, large trucks cant be used to delivery in the urban district, but in the suburbs all kinds of vehicles can be used. To solve the problem, this paper establishes the optimization model and designs a solving method using a genetic algorithm (GA), taking Zigong tobacco distribution center for example. Comparing with the data calculated by empirical distribution route, the results show that the total distance declines 155.47 km, the number of different type vehicles reduces 1-2 and the average load rate increased by 68.3% to 85.1%.
Probability Collectives with Collaborative Optimization (PCCO): A Novel Framework for Handling Complex Optimization Problems
Authors: Zhao Wei , Wang Nan
Published: August 2013

In this paper, a novel framework as a combination of Probability Collectives (PC) and Collaborative Optimization (CO) is proposed and detailed illustrated. The framework has a two-level structure which is similar to that of CO, but with the system level replaced by distributed PC based agents. This formulation maintains the advantage of CO while enhances the optimization and coordination ability at the system level. For better implementation, some adaption and improvement has been made to the origin PC method. The resultant PCCO framework shows satisfied performance in handling complex optimization problems with both efficiency and accuracy.
Parameter Optimization of SVM Based on Maximum Variance – Entropy Criterion
Authors: Liao Jian , Zhou Shao Lei , Shi Xian Jun
Published: August 2013

Kernel parameter selection of support vector machine (SVM) is difficult in practical application. A parameter selection algorithm of SVM was proposed based on data maximum variance - entropy criterion by analyzing the principle of SVM classifier. The algorithm uses data maximum variance - entropy criterion to measure the linear separability of dataset in the feature space, and combines with particle swarm optimization (PSO) algorithm for parameter optimization. The experiment results on datasets from UCI show that the algorithm is excellence in accuracy and improves the training performance of SVM. To further verify the effectiveness of the algorithm, applying the method in fault diagnosis of biquadratic filter circuit, results prove it improves the diagnostic accuracy.
Simulation and Evolutionary of Submarine in Anti-Torpedo Tactics
Authors: Zhan Kai , Wang Jing , Chen Jian Tong
Published: August 2013

When a submarine uses an anti-torpedo tactic, it is a matter of life or death. There are two types of countermeasures:decoys and jammers. A successful anti-torpedo tactic should consist of the deployment of mixed decoys and jammers and the coordination with the submarines maneuver. This paper would like to discuss the anti-torpedo tactics and study the interaction among the submarine and torpedo. After applying the evolutionary algorithm, it is interesting to discover the survivability of submarine in the torpedoes engagement scenario.
Optimization Design of Helical Spring Based on Multi-Objective Genetic Algorithm
Authors: Shao Kang Li , Wang Feng , Wu Yong Hai
Published: August 2013

Suspension spring is used in the suspension system of light vehicle and medium buses widely, and its design quality related to stability and security of the vehicle. This paper take the suspension coil spring of a light vehicle as the research object, its multi-objective optimization model is established. The volume of spring and one frequency free vibration frequency are taken as optimization objective, the strength, stiffness, stability, fatigue strength and the winding ratio of the spring are taken as constraints, and use NSGA-II algorithm, obtained Pareto optimal solution set of the optimization problem. The coil spring model and optimization method used in this paper is also suitable for optimization design of other spring.
Detectability and Locatability of Multiple Gross Errors in DEM Matching Algorithm
Authors: Zhang Tong Gang , Feng Yi Cong , Yang Rong Hao , Ren Zi Zhen
Published: August 2013

DEM matching algorithm without control points is the base for detecting deformation method, the deformation existing in DEMs is treated as gross error. The detectability and locatability of multiple gross errors is very critical according to the surveying error and reliability theory. The interactive observations number (ION) derived from gross error judgement matrix is adapted in this paper. The relationship between zero-column vectors in judge matrix and the rank of the coefficient matrix of DEM matching is discussed in theory, and prove none zero-column vectors exist with real date sets. ION Equal to the number of redundant observations. Experimental results show that DEM matching algorithm has the detectability and locatability of multiple gross errors, and the deformation can be correctly detected by robust estimators in prearranged confidence level.
System Identification of UAV Alap-Alap Using Back Propagation Neural Network
Authors: Sarotama Afrias , Kusumoputro Benyamin
Published: August 2013

A good model is necessary in order to design a controller of a system off-line. It is especially beneficial in the implementation of new advanced control schemes in Unmanned Aerial Vehicle (UAV). Considering the safety and benefit of an off-line tuning of the UAV controllers, this paper identifies a dynamic MIMO UAV nonlinear system which is derived based on the collection of input-output data taken from a test flights (36250 samples data). These input-output sample flight data are grouped into two flight data sets. The first flight data set, a chirp signal, is used for training the neural network in order to determine parameters (weights) for the network. Validation of the network is performed using the second data set, which is not used for training, and is a representation of UAV circular flight movement. An artificial neural network is trained using the training data set and thereafter the network is excited by the second set input data set. The predicted outputs based on our proposed Neural Network model is similar to the desired outputs (roll, pitch and yaw) which has been produced by real UAV system.
Command Ships Driving Simulation System Based on Virtual Reality Technology Teaching Model Research
Authors: Wang Shan Bin
Published: August 2013

Command ships driving simulation system based on existing virtual reality technology teaching conditions, mentioned about "teachers, students, simulation system" for the characteristics of ship driving command interactive teaching mode, built a simulation system, Simulation, computer network and multimedia technology etc as the foundation, connected to the innovative teaching mode of teaching and learning.
Reliability Roadmap for Mechatronic Systems
Authors: Aggogeri Francesco , Borboni Alberto , Faglia Rodolfo
Published: August 2013

This paper aims at proposing a structured approach in reliability design and analysis for mechatronic devices. Mechatronic systems are a complex integration of extremely advanced technological components able to perform tasks with high accuracy and flexibility. This complexity at all levels increases the risks of malfunction, failures and issues. The definition of an effective roadmap is necessary to provide prompt solutions in terms of product performances and duration. This study presents a set of reliability activities to be integrated in the product process development and during its cycle life. This approach may contribute to improve the mechatronic product functionalities and duration.
The Integration Mode and Evaluation on Vegetables Quality and Safety Supervision Automatic Control System
Authors: Li Jin , Ma Chen , Liu Li Hong , Guo Mei Rong
Published: August 2013

Vegetable quality safety is the current hot issue that arose government, social concern and global attention. Now, Along with the continuous development of Agricultural Science and Technology, we have been completed the automatic control system, including vegetable quality safety of information and its monitoring, tracing, emergency management, monitoring, etc., and have formed the automated control system integration model and evaluation system of the vegetable quality and safety regulation based on the whole industry chain, which is the great significance on a sound specification of vegetable quality and safety information system and safeguard consumer interests.
Design and Implementation of Motion Control System with Precise Driving Mechanism
Authors: Lee Sang Kyung , Lee Jun Yeong , Choi Yun Seok , Park Hong Bae
Published: August 2013

In this paper, a motion control system based on 2-axis gimbal system is designed and implemented to drive a high speed and precision. The proposed system consists of the RS-422 interface, 2-axis gimbal platform, SCU (servo control unit) integrated with a high speed DSP chipset, SAU (servo amplifier unit), potentiometer sensor unit, and resolver sensor unit. The SCU using the DSP firmware is designed to get a fast response without an overshoot with step input and a RMS error of low probability with ramp input. The SAU using a voltage control is designed to resolve the zero-crossing distortion for precise motion. To verify the performance and stability of the implemented system, experiments are performed through a measurement of the time and frequency domain response in a laboratory environment by using a PXI (PCI extentions for instrumentation).
Risk Assessment of Relay Protection Setting Value in Power Plant
Authors: Mu Zong Jiang , Xu Yan , Yan Shao Bo
Published: August 2013

Power plant relay protection setting value of the hidden harm causes of relay protection device is not correct, safe and stable operation of the power plant. In this paper, from the angle of the safe operation of power plant, the hidden danger to plant with the protection setting is studied and then the risk evaluation method of power plant relay protection setting values of hidden trouble is proposed. From the power plant relay protection setting value considering two aspects of probability and consequences of potential outbreak of different values, value potential risk is considered, and of a certain power plant in Hubei was made the risk assessment and analysis, in order to verify the theoretical rationality and accuracy.
Operation Betweenness Based Assessment on Overload Vulnerability
Authors: Wang Tong , Ma Jing
Published: August 2013

An operation betweenness based method to assess overloaded lines is proposed. Based on electrical network theory, firstly the branch current sharing factors are deduced; then the operation betweenness of transmission line is defined; finally, on this basis the overload vulnerability of transmission line is assessed. In the proposed method, the impacts of both topological structure and operation modes of power network on vulnerability are considered for the assessment. The physical meaning of the proposed method is determinate and conforms to actual condition of power system, and this method avoids the defect in the complicated network model that the power flows only flow along the shortest path. The correctness of the proposed assessment method is verified by simulation results of IEEE 39-bus system.
Differential Protection for High-Voltage Variable Frequency Motor Based on Sampled Values Algorithm
Authors: Yan Shao Bo , Xu Yan , Mu Zong Jiang
Published: August 2013

With the application of inverter in high-voltage motor, the traditional current differential protection cant be used because of the variable frequency. So it adopts low sensitive current instantaneous protection as main protection, which doesnt meet the security standard of grid state. In order to improve the sensitivity and reliability of high-voltage motor protection, a new method based on current sampled values is proposed in this paper, which adapts to the variable frequency system. After a brief description about the impact of inverter on main protection of motors, it introduces the principle of sampled value current differential protection and variable RS sampled value algorithm. A matlab example is used to simulate. On the whole, the simulation and analysis of the calculation results verify the feasibility and reasonableness of the method. Therefore, it provides a new approach for the protection of high-voltage motor in variable frequency system.
Application of Fussy-PID Control and Management-Matrix Strategy in Central-Conditioner Energy-Saving System
Authors: Xu Qin
Published: August 2013

The past decade witnessed a growing concern about the increasing energy consumption of central air-conditioning. Traditional PID control is practicable in partly cutting energy costs but not in achieving their energy-saving potential fully for those central air-conditioning, especially in great nonlinearity condition. To achieve this, the fussy-PID control and management-matrix strategy are introduced in this paper, with their advantages such as: better dynamic responsibility, better adaptability, better robust control, mathematic model invariant and heating/cooling on-demand allocation. Based on this theoretical assumption, an experiment is designed and implemented in a university library. Consequently, the experiment proves that the combined control system, with fussy-PID control and management-matrix strategy, is stable, fast, and feasible in energy-saving of central air-conditioning by targeting at its water system control.
Observer Path Design for Bearings-Only Localization with State Constraints
Authors: Quan Hong Wei
Published: August 2013

In bearings-only target localization, observer path have an important effect on the accuracy of target localization. Based on the analysis of Fisher information matrix, an optimal approach to designing observer path is proposed. Observer path derived from the step-by-step optimal algorithm only depends on observer's initial states and state constraints. The optimal path resulted with step-by-step algorithm is demonstrated by computer simulation. Compared with traditional methods, our algorithm is not limited to the number of observations as well as terminating conditions.
A 10T Cell Design without Half Select Problem for Bit-Interleaving Architecture in 65nm CMOS
Authors: Zhou Hong Gang , Tan Shou Biao , Song Qiang , Peng Chun Yu
Published: August 2013

With the scaling of process technologies into the nanometer regime, multiple-bit soft error problem becomes more serious. In order to improve the reliability and yield of SRAM, bit-interleaving architecture which integrated with error correction codes (ECC) is commonly used. However, this leads to the half select problem, which involves two aspects: the half select disturb and the additional power caused by half-selected cells. In this paper, we propose a new 10T cell to allow the bit-interleaving array while completely eliminating the half select problem, thus allowing low-power and low-voltage operation. In addition, the RSNM and WM of our proposed 10T cell are improved by 21% and nearly one times, respectively, as compared to the conventional 6T SRAM cell in SMIC 65nm CMOS technology. We also conduct a comparison with the conventional 6T cell about the leakage simulation results, which show 14% of leakage saving in the proposed 10T cell.
Design and Implement of Open Laboratory Management System
Authors: Liu Jin , Ding Gang , Lin Peng
Published: August 2013

After implementing the open laboratory, students can make self-adjustments to their learning plans and choose different levels of experiments according to their learning degree, which will change the traditional passive learning into active learning. From the management reality of open laboratory, employing ASP NET and SQL Server 2008 to develop an opening laboratory management system which is based on the Web. This system has realized the course scheduling algorithm and efficient management of laboratory and students can reserve laboratory to do experiments according to their own time.
How to Establish the Cost Advantage of Business E-Commerce
Authors: Xu Yin , Li Xiu Qin , Ye Ping
Published: August 2013

The tide of e-commerce is rolling up in our country;many enterprises announce inter-netted. They build websites, e-commerce platforms, especially in the model of business to consumer (B2C). At present, however many enterprises are in very difficult situation. Therefore, it is necessary to analyze the cost of the B2C business model so as to explore countermeasures in how to establish cost advantage in the B2C e-commerce.
Digital Archives Construction Based on Cloud Computing
Authors: Zhou Han Qing , Huang Ling
Published: August 2013

Digital archives organically integrate computer technology with archives information resources, which has strong vitality and pours fresh blood into the archives work. The paper discusses the advantages, problems and solutions of digital archives based on cloud computing.
Automatic Scoring Algorithm of Chinese Subjective Questions Based on Domain Ontology and Sentence Framework
Authors: Chen Hong Chao , Wang Jin Jin , Zhu Xin Hua
Published: August 2013

This paper constructs domain ontology for Data Structure Course and standard (student) answer sentence framework, then proposes a new approach to automatic marking Chinese subjective questions based on them. This method deals with the standard (student) answer in word segmentation, part-of-speech tagging, pronouns digestion, extracting framework, calculating word similarity. Compared with the traditional ones, this means allows the computer to understand the semantic information as much as possible, keeps the semantic relations between standard answer and the students, improves scoring accuracy.
A Redundancy Resolution Method for Robot with Multi-Constraints Based on the Varied Weighted Least-Norm Principle
Authors: Zhou Xue Feng , Sun Ke Zheng , Chen Xian Shuai , Zhang Gong
Published: August 2013

In order to compute the redundancy-resolution for robots with multi-constraints, an approximate method based on weighted least-norm principle is presented. With this method, different constraints is assigned with corresponding coefficients, and the cost function is given out and optimized for the best between the accuracy and the fulfillment of the constraint, which is based on the weighted least-norm of each constraints and the main task. Firstly, the state of the art of redundant resolution is introduced in brief and the drawback with the application to the resolution with multi-constraints is pointed out. Then the redundancy resolution at velocity level and position level, and the modeling of the constraints are proposed. In view of this, the weighted least-norm method is presented. Finally, the effectiveness of the proposed method is demonstrated by simulations of a six-DoFs biped walking robot Bibot-U6 with the stability constraint and joint limits constraints. The result shows that the method has an excellent robustness for the under-determined system and over-determined system, meanwhile has a good accuracy.
SDMM Based Ranking Mechanism for Semantic Web Services Search
Authors: Zeng Zhi Hao , Guo Fu Lu , Sun Qi
Published: August 2013

For search of semantic Web services, a semantic Web services matching results ranking mechanism based on SDMM (semantic distance metric model) is proposed. The calculation of semantic similarity measure can be realized by using this three-dimensional SDMM which is for presenting the semantic relationship of objects defined in ontology, therefore, the semantic Web Service matchmaking results can be ranked in accordance with the semantic similarity measure. The approach based on SDMM significantly improves search accuracy of semantic Web service matchmaking, and enhance users experience of semantic Web services search. By a set of experiments, we demonstrate the benefits and effectiveness of our approach.
Bioleaching of Cobalt White Alloy in the Presence of Acidithiobacillus ferrooxidans
Authors: Xiao Li , Chen Bin , Zhong Hui , Guo Quan Wen
Published: August 2013

Acidithiobacillus ferrooxidans (A.ferrooxidans) was used to leach the hard cobalt white alloy in this study. The optimum pH and temperature in the presence ofA.ferrooxidanswas 2.0 and 30°C respectively. Three methods of treating the bacteria, which are directly inoculated with 107cell.ml-1in 9K culture medium, collected bacteria by centrifugation and dispersed to 107cell.ml-1in the iron-free 9K culture medium, and beforehand adapted by the alloy and collected by centrifugation, were employed. The result showed that for the first mode, it took 6ds to finish the leaching of cobalt and 8d for copper with decrease in the number of the bacteria in leaching. For the second one, it needs 3d and 7d to dissolve cobalt and copper, and also accompanied decrease in the bacteria. And for the third one, the modifiedA.ferrooxidanscould increase to108cell.ml-1, and the leaching of two metals was, respectively, for 2d and 5d with the extracting rate of them being 99.50% and 99.0%.