bluuebunny/crossref_metadata_2025 huggingface dataset:
Mathematical Modeling on Ultra-Filtration Using Functionalized Carbon Nanotubes
Authors: Chan Yue
Published: June 2013

Numerous computational simulations have been performed for the study of the ultra-filtration using carbon nanotubes. However, most carbon nanotubes have dangling bonds at nanotube rims, which severely compromise the validity of such computational simulations. In this paper, we use applied mathematical modeling and the continuous approximation to investigate the acceptance conditions for the water and ions permeating through the functionalized carbon nanotube, and in particular the sodium and chloride ions. Such problem is important for future ion transport and detection. For the nanotube of radius 3.8 Å, while the presence of a tiny positive charge at the nanotube rim will prevent water from entering the nanotube, the presence of a negative charge at the nanotube rim will always enhance the water absorption. With a proper tuning of the total charge at the nanotube entry, we can selectively sieve the sodium or chloride ions. The mathematical framework presented here possesses the merit of delivering deductive and rapid results.
The Comparative Study of Non-Equilibrium and Equilibrium MD Simulation Results on Gas Flow in Nanopore
Authors: Liu Qi Xin , Cai Zhi Yong , Yu Xiao Ping
Published: June 2013

Now the non-equilibrium MD simulations are frequently used to study the gas flow characteristic at nanoscale. In the non-equilibrium MD simulations, one force which is several magnitude orders larger than the actual force was added on all gas molecules. Its very necessary to study whether such large force added in non-equilibrium MD simulation will affect the simulation results. The present paper carried out the comparative studies on the simulation results of gas flow in nanopores by non-equilibrium and equilibrium MD. The gas number density profile and the gas molecular mean free path are studied in this paper, our simulation results indicate that both non-equilibrium and equilibrium MD produce no obvious difference on simulation results of the gas number density profile and the gas molecular mean free path. It could be concluded that even the force added on every gas molecules is very large in non-equilibrium MD simulation; the added force doesnt obviously affect the simulation results.
Zinc Oxide Nanostructures Synthesized by Thermal Oxidation of Zinc Powder on Si Substrate
Authors: Noothongkaew Suttinart , Pukird Supakorn , Sukkabot Worasak , Kasemporn Bualoy , Songsiririttikul Prayoon , An Ki Seok
Published: June 2013

ZnO nanowhiskers were formed by a simple oxidation of metallic zinc powder 99.9% at different temperatures from 400-900 °C for 2 hours on the silicon substrate. The result can be obtained after the thermal oxidation process, the ZnO nanowhiskers with different morphologies at different temperatures in which these morphologies and composition of ZnO nanostructures were characterized by scanning electron microscope, (SEM) and X-ray diffraction, XRD. It was found that the products were nanowhiskers, the structure are triangular shapes with average width of 10-50 nm at the root, 10-30 nm at the tip and length in the range of 1-3 μm was observed by SEM. Temperature in the range of 600-700 °C was suitable for the preparation of ZnO nanowhiskers. At higher temperature of 800 °C, the concentrations of ZnO structures become lower and stronger. At the oxidized temperature of 900 °C, ZnO nanowhiskers were not found and surface morphology become to porous. These results indicate that the oxidation rate is faster than the diffusion rate of Zn vapor on the surface of ZnO nuclei.
Study on Toxicity of Copper Oxide Engineered Nanoparticles to Tobacco BY-2 Cells
Authors: Xu Li Li , Sui Hai Jun , Liu Xiao Yun , Wang Zhen Yu
Published: June 2013

The extensive application of nanoparticles will inevitably lead them to be released into the environment, which causes potential hazard to the ecosystem. This study was to provide the information of the toxicity of CuO ENPs to BY-2 cells in vitro. Tabacco BY-2 cells were exposed to 4 mg/L and 12 mg/L CuO ENPs. Cell viability was evaluated in 0 h, 2 h, 4 h, 8 h, 12 h, 16 h, 20 h and 24 h. The viability of BY-2 cells exposed to CuO ENPs gradually decreased with exposure time and the exposure concentration increasing. After 24 hours exposure to 12 mg/L CuO ENPs, plasmolysis occurred in cells. Some ENPs were absorbed on the cell wall, and only a small number of ENPs entered the cell. Membrane leakage turned up. This might be caused by lipid peroxides, destroying biological membranes.
Bioactivity of Microparticles Prepared from Fermented Seaweeds Waste Materials
Authors: Zhang Bing Zhao , Yan Pei Sheng , Zhang Wei , Paulsen Berit Smestad
Published: June 2013

Seaweeds waste is a main oceanic nonproductive material in related industries. In this study, it was utilized for incubation of Cantharellus sp., a popular edible mushroom. The micro particles obtained from the incubation were investigated for antioxidant activities. The results showed that the Cantharellus can grow on the seaweeds waste and produced dense mycelia. Meanwhile, antioxidant assays showed that the total antioxidant capacity and hydroxyl radical scavenging capacity of the micro particles obtained from Cantharellus incubation were significantly higher than those of the seaweeds waste. This is not only the first time to incubate Cantharellus sp. on seaweeds waste, but also the first study involved in antioxidant activities of fermented culture with Cantharellus sp.. It would be a beneficial pathway to recycle seaweeds waste with incubation of Cantharellus to produce potential natural antioxidants.
Electrical Generator Made of Aligned BaTiO3 Nanofibers
Authors: Gao Qiang , Gao Chun Xia
Published: June 2013

Mechanical energy scavenging from ambient environments is an attractive renewable source of power for various applications. In this work, biocompatible Pb-free ceramic nanofibrous assembles were successfully prepared via electrospinning. The electrospun precursor nanofibers werein-situstretched, poled during the eletrospinning process and aligned on the high-speed rotating collector. Moreover, XRD pattern of obtained BaTiO3nanofibers showed well-defined perovskite peaks with higher intensity and no detectable secondary phases which are potentially used for nanogenerators.
Erosive Ions in Industrial Boiler Water on the Corrosion Behavior of Water-Wall Tubes
Authors: Li Mao Dong , Zeng Bin , Du Yu Hui , Liu Juan , Zhao Jun Ming , Zhu Zhi Ping
Published: June 2013

The maximum allowable content of chloride ion in industrial boiler water is closely related to the concentration ratio and operating conditions, the reasons for industrial boiler can not be operated under too high concentration ratio is due to the limit of Cl- content. There are many studies for the electrochemical corrosion behavior of carbon steel caused only by chloride ion, but few studies for calcium and bicarbonate ions on the electrochemical corrosion behavior of carbon steel. In order to study the corrosion of water-wall tubes for industrial boilers (20# carbon steel) caused by chloride ion, the erosive anion (Cl) and Ca2+, electrochemical impedance spectroscopy and Tafel polarization techniques were performed. Autoclave static experiments were performed to study the corrosion inhibition property of carbon steel with 1-hydroxyethylidene-1, 1-diphosphonic acid (HEDP) additive in industrial boiler water medium. The results showed that Cl- could promote the corrosion of carbon steel obviously, HEDP has a good corrosion inhibition effect on 20# carbon steel at a concentration of 25 mg/L; Lower concentration Ca2+ in industrial boiler water could promote the corrosion while addition of higher concentration Ca2+ could inhibit the corrosion. It can provide a reference for the safe operation of the industrial boiler.
Body Measurements Forecast Based on Factor Analysis and Radical Basis Function Net
Authors: Liu Zheng , Li Ji Tuo , Chen Guang , Lu Guo Dong
Published: June 2013

For acquiring the body measurements precisely and conveniently, this paper presents a forecast method with character parameters. The character parameters are chosen based on factor analysis. The nonlinear model based on radical basis function net builds the correlation between the character parameters and the detailed measurements. Through measuring a few character parameters easily we can obtain the whole body detailed sizes. This technology can be used in and benefit the clothing manufacture and human modeling.
Research on Aircraft Assembly Sequence Planning Technology Based on Key Characteristics
Authors: Sun Zhan Lei , Han Peng Fei , Zhao Gang
Published: June 2013

Assembly Sequence Planning (ASP) is an essential question for aircraft assembly process design. Modern aircraft assembly contains plenty of complex shape components, which have so many assembly features to ensure, this leads to a large number of feasible assembly sequences using traditional sequence planning algorithms; and it is hard to evaluate the contribution to assembly quality for every sequence. A methodology called Key Characteristics Based ASP is proposed in this paper, which can significantly reduce unavailable sequences and ensure key features for quality in assembly process designing compared with previous methods. The methodology focuses on the final assembly quality and considers it as Assembly Key Characteristics (AKCs) in the beginning of assembly process design. With tools such as AKCs decomposition, Datum Flow Chain, precedence constraint matrix, the methodology describes the main process for ASP. To verify the technologys effectiveness, this paper presents an application of the algorithm in an aircraft component assembly by an 863 program.
Experimental Investigation of Downward Flame Spread over RPU Samples
Authors: Wang Yuan Ming , Zhang Yong Ming , Zhao Heng Ze , Zhao Lan Ming
Published: June 2013

The combustion process of polymer is a complex coupling of energy feedback from flame to fuel surface with degradation of polymer. In this paper, a series of comparative laboratory-scale experiments were carried out to study the effect of sample width on downward flame spread over the rigid polyurethane (RPU) foam, a typical thermal insulation material. The variations of some important parameters such as flame height, pulsation frequency and flame spread rate were measured and analyzed. Results show that if the width fixed, the parameters mentioned above independent with time. If the width less than 25cm, the sample can not burn completely. With the expand of width, average flame height and flame spread rate present the same chang trend that increase first and then decrease and finally reach a steady state, flame pulsation frequency increases first and then decreases since sample width more than 20cm. The heat transfer from flame and pyrolysis zone to virgin region is proportional to the height of flame, and mainly dominated by radioactive regime.
The Influence of Eccentricity on Thrust Force of Helical Milling in Carbon Fiber Composite Holemaking
Authors: Sha Zhi Hua , Wang Yi , Zhang Sheng Fang
Published: June 2013

Carbon fiber composite is widely used in aerospace and aircraft industries because of their remarkable advantages such as lightweight and high strength. As an effective holemaking technology, helical milling is widely used in machining carbon fiber composite material recently. In this paper, the mathematics modeling of tool motion in helical milling is studied and simulated; the effect of eccentricity on helical milling is analyzed and tested by experiment. From the analysis and experiment, a conclusion is drawn that: using a smaller diameter tool and larger eccentricity cause a decrease in thrust force and an improvement in delamination defects.
The Environmental Protecting Gourd Packaging Material
Authors: Liang Yan
Published: June 2013

With the raise of serious global environmental problems, it has become an important theme of the development of the packaging industry to research environmentally friendly packaging materials. Gourd is a kind of natural packaging material.This paper studied the gourds properties as the packaging material.It reported the present status of gourds processing which includes the dispose of the material and the ornament of the material.It also reported the relations between gourds and packaging which include the materials application in liquid packaging area and solid packaging area.At last ,it demonstrates natural gourd can be used and developed as native materials in environmental packaging materialand it advocates enlarging the scope of gourdsapplication in packaging area to conform to the trend of the development of green environmental protection industry.
Study of RFID Tag Antenna Manufacturing Based on Printing Technology
Authors: Liu Cai Feng , Lu Di Feng , Yan Fui Gui , Mei Yang
Published: June 2013

To study printing technology used in the RFID field, just want to make the cost of tags much lower. Since printing technology has widely used in RFID field,there are many problems. Through analysis of influence factors of antenna printing technology, three solutions to solve the difficultys of RFID tag antenna manufacturing use of printing technology. In order to improve the printing quality of the printed ink film of the RFID tag antenna, many factors should be considered. Finally, agrees that the future of conductive ink screen printing manufacturing RFID tag antenna technology is splendid with our effective work.
Research of Monitoring Method of Ice Thickness for Continuous Slant Spans of High-Tension Line
Authors: Yu Fa Shan , Lou Hui Ming , Gao Yang , Tian Xi Fang
Published: June 2013

High voltage overhead line icing thickness directly affects the safety operation of transmission lines, how to realize line icing monitoring has been a hot research issue in recent years, the continuous up and downhill terrain transmission line is regarded as the main research object, according to the wire suspension point inclination angle and insulator strings offset angle the detection method of calculating line icing thickness was proposed, based on the inclination angle and the inclination of wire suspension insulator icing thickness calculation mathematical model was developed, simulation research was conducted with MATLAB GUI interface, the efficiency of this method for line icing thickness detection is proved.
Warp Degree Optimization of Automobile Bumper in Sequential Injection Molding
Authors: Cao Jiang Dong , Ding Jian Bo , Wang Lei Gang
Published: June 2013

An automobile bumper is a large scale thin-wall plastic part. It is difficult for the weld lines of product to be removed by conventional injection method. Five valve gates in sequential injection have been used to control successfully weld lines to the border, but the warp degree of the product is too large. Through grey theory the packing pressure and time of valves opening and closing have been optimized. The grey relational degree have been calculated, the optimal process parameters group have been obtained by variance analysis. The result has been verified successfully in Moldflow software, the warp degree of product has been decreased greatly and satisfied the requirement of industry production. The injection method can be applied in actual production and increase corporate profits.
The Room Temperature Ferromagnetism of the Electrodeposited ZnCoO Film after the Ammine Plasma Treatment
Authors: Cao P. , Bai Y.
Published: June 2013

Zinc oxide materials with outstanding performance are the broadband gap semiconductor, and make it a number of important subjects and a wide range of applications. In this paper, a Co-doped ZnO film grown by electrodeposition shows room-temperature ferromagnetic properties after the ammine plasma treatment. The XPS spectra show that the Co ions have a chemical valence of 2+ and a few nitrogen atoms was incorporated into ZnCoO film during the treatment process to occupy oxygen positions. The electronic properties also give evidence that nitrogen is incorporated into ZnCoO film. So the ferromagnetism is mediated though the p-d exchange interaction between nitrogen induced carriers and Co atoms.
Study on Digitalized Energy Conservation of Industrial Buildings and Materials
Authors: Liu Zi Yi , Wang Shou Yi
Published: June 2013

Digitalization is not only an information storing and processing technology, but also a technical foundation for the information society and the knowledge economy society. It changes not only the development process of production technology thoroughly, but also the life style and thinking concepts of people greatly. In this paper, through analyzing the influence of digital technology on industrial buildings, the development trend of industrial building energy conservation is discussed, and also the idea about the digitalized energy conservation of industrial buildings is proposed. That is, cored at digital technology, the exchange and sharing of all kinds of information and resources inside and outside the environment of industrial buildings are realized through the digitalization, networking and management service standardization of building information, so that a safe, efficient, comfortable and humanized production, work and living environment can be provided for people.
Study on Loss Reduction of Power System Power Plant Transformer
Authors: Duan Zheng Zhong
Published: June 2013

With the rapid development of the grid, the grid line distribution and power plants, substations increasingly dense and intertwined. The continuous construction of the power grid operation mode, power supply and distribution network will inevitably lead to change. The interconnecting transformer to adjust the voltage guarantee for the protection of the safety of the grid system voltage quality at the same time reduces losses powered economy. Adjust the power generation in the state of research transformer work to achieve the feasibility of reducing the power loss.
Experimental Research on Critical Force of Crushing and Sorting Coal Mine Gangue
Authors: Zheng Wen Xiang , Sun Ming , Han Wan Dong
Published: June 2013

First, The pressure test on two actual coal mine irregular and different particle sizes of coal and gangue, through the experimental data, using MATLAB software to give a graphic simulation and assumptions test of normal distribution, by the graphics and hypothetical test confirmed that coal and gangue had obvious demarcation, namely the critical force of crushing and storing coal gangue. In a coal mine as an example,and acquisiting more irregular and different particle sizes of coal and gangue were broken by static experiments and dynamic crushing experiment, using the experimental data obtained pressure distribution and pressure distribution curve equation,by equation to solve the crushing critical force FL of the size of 50-90mm coal and gangue,through mathematical and graphical analysis proved the rationality of FL,and providing a basic data for the future work.
Coordination Fault Diagnosis Based on RBF
Authors: Xu Rui Hua , Wang Zheng Zhou , Yan Ya Dong , Ma Cai Wen
Published: June 2013

In large-scale complex system, The establishment of a fast, accurate fault diagnosis system is more difficult because there exist many uncertain elements between the fault cause and the fault sign .A fault diagnosis system is established based on RBF cloud neural network ,the RBR (rule-based reasoning) and the CBR (case-based reasoning).The fault diagnosis system not only has the advantages of self-learning, high accuracy, randomness, fuzziness, etc ,and has the advantages of independently of mathematical model ,rich knowledge representation, mighty problem solving ability, etc. Theoretical analysis and simulation results show that the system is feasible and effective for fast and accurate fault positioning of complex systems.
The Study and Application of Intelligent Uncertainty of Measurement with CAES
Authors: Deng Jia Bin , Hu Chang
Published: June 2013

This paper discusses the relevant concepts, algorithms and the practical evaluation process on the intelligent evaluation of uncertainty of mechanical measurement with the use of computer technology (such as Computer-Aided Evaluation System). Through the optimization and integration of evaluation process, key points and regulative relationship, the author makes use of computer-aided calculation and database technology to achieve standardization of evaluation process, intelligent data analysis and automatic calculation of uncertainty.
Study on Electronically-Controlled Calibration System
Authors: Shuo Tian , Chen Wang
Published: June 2013

Based on the purpose of achieving real-time measurement of more type parameters and real-time data share in measurement and control system, Lab VIEW is taken as supervisory and control software, combining OPC interface to implement the objective. It could carry out fast and reliable data communication between ECU and PC, as well as precise delivery and efficient manage of calibration parameters, so it could achieve off-line or online calibration for engine.
Bi-Station Multi-Target Tracking Using Range and Doppler Measurements
Authors: Fu Tian Jiao , Zhang Li Guo , Ren Jian Yue
Published: June 2013

The azimuthal measurements of the high frequency ground wave radar are poor in an actual environment, which can cause the plots highly decentralized and damage the formation of the over-the-horizon tracks. To solve the problem, a new radar system is proposed to triangulate target tracks using range and Doppler measurements only. On the basis of the analysis of the characteristics of the range-finding location, a multi-target tracking algorithm under non-clutter condition is given in this paper, which further improves the tracking algorithm of this system. Simulation results show the effectiveness of this method.
Study on Natural Non-Circulating Current Work Mode of AC-AC Converter Based on Two-Variable Control Method
Authors: Feng Gao Ming , Tan Xing Guo , Du Qing Nan
Published: June 2013

Three work modes of general AC-AC frequency transducer are compared. And the disadvantages of two work modes are pointed. In order to overcome these disadvantages, on the basis of two-variable control theory, the natural non circulating current work mode is brought forward and analyzed. Two controlled variables trigger angle α and pulse width b, need control in this mode. How to assign the moment of trigger and how to assign trigger pulse width are the key problems. And then these problems are discussed. The principle of this mode is analyzed in a third of all frequency value as an example. The essence and excellence of natural non circulating current work mode and the feasibility are pointed out.
Harmonic Vibration Control Synchronization Analysis of Nonlinear System Based on Flux Linkage Estimate
Authors: Li Xiao Hao , Huang Ying , Ma Ming Xu
Published: June 2013

Aimed to the nonlinear harmonic vibration synchronization system which driven by two exciting sources that, the dynamic model of the nonlinear vibration system has been established. According to the electromagnetic driving characteristics of the asynchronous motor that used to be exciting source, and based on the analysis result of the dynamic model, the two exciting sources flux linkage equations and output torque equations have been established in the paper. And the current control regulation model and flux linkage estimate model of the two exciting sources have been derived also. By numerical simulation experiment, the validity of the harmonic vibration control synchronization strategy for the two exciting sources based on the flux linkage estimation has been verified, which can used to provide the basis and protection for the application of the nonlinear harmonic vibration synchronization system that driven by two exciting sources.
Research on the Anti-Interference of Mine Soft-Start Controller
Authors: Guo Ji Hong , Zhang Peng Jie , Ma Hong Ming , Ma Hong Jing
Published: June 2013

According to QJR-400 mine explosion-proof and intrinsically safe AC motor soft-start controllers are subject to various interference, to analyze interference source, interference factors and its consequences, and to study on the those interferences that has taken measures. In the hardware design, to use photoelectric isolation, anti-interference regulated power supply and reasonable grounding and other measures, which can effectively avoid interference. In the software design, digital filtering program can effectively eliminate the interference of random signals and pulse signals. The experimental results show that these measures can effectively inhibition of external interference.
Design and Implementation of the System Based on the Mechanical Topology Smart Furniture
Authors: Tang Jing Tian , He Hong Ying , Wu Xin
Published: June 2013

Using microcontroller ATmega16L designed a remote smart home control system based on the wireless network technology. The system contains mechanical equipments such as motor-driven window and curtain and manipulator. The manipulator is to control the on/off state of the valve to the gas tank .The paper presents the main function of the system's components and systems, and a part of the system block diagram as well as some part of the hardware circuit diagram and program. Some subsystem of the smart home system can be used for automatic control in industrial field.
Research and Development of High-Quality Mechanical Engineering Products
Authors: Wen Zhe , Dong Qian
Published: June 2013

Computer is high-tech equipment in the age of information, and has been widely applied in all industries by relying on its sharing, universality, intelligence and other characteristics. Seen from the structural composition, software and hardware are two core components of computer, and play a decisive role in the quality of computer and its system in the actual work. Software development is a process for building up software system or software of system according to the needs of users; in high-quality software research and development, multiple aspects such as market research, demand analysis, structure design and model debugging are involved, and the quality of products can be ensured only if each operation link is strictly controlled.
Research on Recycled Materials in Public Art
Authors: Huo Mei Lin
Published: June 2013

Public art" of the recycled material in the context of globalization is formed under modern ecological concepts, environmental movement, and artistic experiments together. It will change the status quo of the lack of dialogue between materials science with art, recycled materials from the point of view of public art, research and development, and applications make proactive in environmental design. In this study, "renewable materials" mainly focused on the public art materials field, its scope and methods of public art. Recycled materials include not only well-known natural renewable materials, but also include man-made biodegradable materials and life industrial recycled materials, which greatly enriched the scope of public art materials, and reflect the public geographical characteristics and diversity of the arts.
Herbal Materials Warehouse Environment Monitoring System
Authors: Li Hui , Zheng Yan
Published: June 2013

In recent years, the efficacy of Chinese herbal medicines decreases often because of bad storage. It carries huge economic losses, furthermore, it endangers the safety of people's lives. Therefore, it is an urgent need for a new monitoring concepts and monitoring system for medicine warehouse to overcome many shortcomings. Combining the wireless sensor network technology, we researched environment parameter detection system of Chinese herbal medicine storage with a reasonable structure. It can monitor the air temperature, humidity, light, and water content parameters of herbs storage environment. We designed the hardware, software and interactive interface of the monitoring system. The proposed system has a better real-time and more accurate compared with the traditional manual monitoring system.
Analysis of Chemical Raw Materials Dimethyl Carbonate
Authors: Liu Chong , Wang Jun Xian
Published: June 2013

Dimethyl carbonate is a recently developed environmentally friendly green organic chemicals, widely used alternative phosgene the dimethyl sulfate Halothanes larger environmental hazards of chemicals used as carbonation and modulating agent, to meet the current requirements of the cleaning process. This article reviews dimethyl carbonate in pesticide and medicine and intermediates (such as furazolidone intermediate 3 - amino-2 - oral oxazolidinone, sulfonylurea herbicides, carbendazim, carbaryl ring ciprofloxacin intermediate 2,4 - dichloro-5 - fluorobenzoyl acetate, isocyanine) synthesis process green transformation.
Research on Efficient Ceramic Materials and Measure Scheme
Authors: Qi Hao , Wang Xue Yan , Zhang Qiao Mei
Published: June 2013

In the design of industrial products, industrial designers face the new product design issues in ceramic materials. The designer will be more concerned about the application of new materials in the product design respected selection innovations. The emergence of the ceramic material, adding a new "color" for the design of the expression, provides designers with a richer design means of expression.
Agriculture Supply Chain Visibility Management Based on the Internet of Things
Authors: Bao Su Zhen , Liu Qing Song , Jia Bao Xian
Published: June 2013

In view of Supply Chain Visibility Management insufficiency, the paper used ontology technology to describe the supply chain information to realize visibility retrieval. Integrated the wireless sensor network with RFID technology, the paper put forward supply chain visibility management system structure based on the Internet of Things. The paper introduced the key technology of the system and its specific application fields. The system realization will play an important role in the development of modern supply chain management.
Markov Process Modeling for Wireless Sensor Network Availability with QOS Constraints
Authors: Karimi Abbas , Kiamanesh B. , Zarafshan Faraneh , Al-Haddad S.A.R.
Published: June 2013

The purpose of this paper is calculating the availability of wireless sensor network for a virtual grid by using Markov model. Since, wireless sensor networks are constraints by energy, their energy consumption should be limited within a way to guarantee their quality of service. In this paper, availability and quality of service in a wireless sensor network with particular coverage are investigated by using an energy optimized algorithm and Markov process.
Sorption of Methylene Blue and Acid Orange 7 onto Ananas comosus Peels and Leaves Based Activated Carbon
Authors: Lutpi Nabilah A. , Jamil N. Najihah , Abdullah C.K. Kairulazam C.K. , Wong Yee Shian , Ong Soon An , Izhar T. Nuraiti T.
Published: June 2013

The adsorption of Methylene Blue (MB) and Acid Orange 7 (AO7) dye onto Ananas Comosus Mixed Peels and Leaves (ACMPL) were carried out by conducting four different parameters such as initial concentration, pH, dosage of adsorbent, and contact time. Effect of initial concentration for both dyes showed that higher initial concentration would take longer contact time to attain equilibrium due to higher amount of adsorbate molecules. The effect of pH showed highest percentage removal for MB is at pH 9 which is 95.81%. Meanwhile for AO7 the highest percentage removal is 31.06% at pH 3. The percentage removal of MB had reached the equilibrium at dosage 0.5g while AO7 keep increasing with the increment of adsorbent dosage. The percentage removal of MB and AO7 had increased until hour 2.5 which was from 72.5% to 86.93% and 19.441% to 36.89% respectively and reached equilibrium at 3 hour contact time.
Numerical Studies on the Performance of a Bubble Pump
Authors: Augustin L. Bruno , Golecha Jigar , Shreenaath K.G. Sai , Swami Vishnu , Suresh M.
Published: June 2013

Increase in the consumption of electrical energy worldwide has laid the emphasis on replacing electrical energy with thermal energy wherever possible. In this paper, the bubble pump, which is ‘heart’ of diffusion- absorption refrigeration system, has been investigated numerically. A thermally driven bubble pump, which can be powered by waste heat or solar thermal energy, is used to lift the liquid. As a result of the absence of any mechanical moving part, the refrigerator is silent and very reliable in addition to an economical and environmental friendly device. The concept of such a pump is already in existence but optimization studies are yet to be extensively investigated. This paper deals with the optimization of various parameters of the bubble pump using water as the working fluid. Parametric studies are carried out and a design optimization for maximum efficiency is performed for various operating conditions. Numerical simulation of the bubble pump is carried out using simple numerical equations which assume slug flow in the bubble pump. The diameter of the pipe and the position of the heating element are varied and the effect it has on time taken, pumping ratio and pumping ratio for one pumping cycle is studied.
Simultaneous Measurement of Strain and Temperature with Hollow Core Fiber Based Intermodal Interferometer
Authors: Qi Fei , Hu Li Min , Dong Xin Yong , Zhao Chun Liu , Jin Shang Zhong , Chan Chi Chiu
Published: June 2013

A hollow core fiber based all-fiber intermodal interferometer is proposed for measurement of strain and temperature. The sensing structure is simply a short segment of hollow core silica fiber being spliced between two normal single mode fibers. The fabrication process only involves a conventional fusion splicer and a mechanical fiber cleaver. Experimental results show that sensitivities of-1.21 pm/με and 21.30 pm/°C are achieved for strain and temperature measurements, respectively.
A Damage Identification Method Based on Differential Gradient of Normalized Strain
Authors: Lu Ling Ling , Huang Chen Guang , Wang Xi
Published: June 2013

A damage identification method based on differential gradient of normalized strain (DGNS) is presented to overcome the disadvantages of traditional static damage identification, such as the complicacy of measurement system and the limited measurement points etc. Two numerical simulations were conducted on a dog-bone specimen to verify the feasibility of the method. In the experiment, differential of strain contour density (DSCD), which has the same physical meaning with DGNS，significantly improves the smoothness and visualization of field information. Both the simulation and experiment results show that, DGNS (DSCD) is capable of describing the structural damage property meanwhile effectively isolates the damaged areas from regions with inhomogeneous deformation due to geometric inhomogeneity. Moreover, DGNS (DSCD) is a structural intrinsic parameter, and independent on external loads.
Development of On-Line Monitoring System and Aging Characteristics Research of Switchgear
Authors: Liu Shu Xin , Cao Yun Dong , Hou Chun Guang , Liu Yang , Liu Xiao Ming
Published: June 2013

For improving reliable operation of switchgear in power system, an approach for on-line monitoring the insulation characteristic and bus-bar temperature rising of the switchgear is proposed in this paper. Through comparing several existing temperature measurement methods for monitoring temperature rising elevation at bus-bas, a new design of temperature monitoring method is proposed. It adopts quick-magnetic saturated current transformer, temperature sensor and infrared transmission to solve the problem of high voltage isolation. The epoxy resin insulation material which is commonly used in switchgear its aging mechanism data is not complete, seriously restrict on-line monitoring for switchgear, so thousands hours of aging experiment is done on switchgear, systematic study various electrical characteristics variation law on the gradual aging process of epoxy resin insulation materials. Therefore, study on the aging characteristics of switchgearinsulation and its lifetime estimation method is the key technology to understand agingmechanism better, search for new fault diagnostic method and the way to extend theuseful lifetime of switchgear. At last, the system runs in real system and the result shows the on-line monitoring system is stable and reliable which can be provide reference for on-line monitoring system design of switchgear.
Safety Inspection of an Overhead Crane Based on Virtual Simulation
Authors: Xu Bin , Yu Zhong Jian , Liu En Pin
Published: June 2013

Safety inspection was playing a very important role in controlling accidents of overhead cranes, especially under the modification case. During a modification of a crane, strength evaluation was a necessary step. Experimental stress analysis and theoretical calculation were traditionally applied in rerating the strength, but it cost lots of time and resources. Virtual simulation was an alternative method, and in this investigation finite element method was adopted. The three dimension models of bridge and trolley were built while the rated load was changed to the modification case, and then stress-strain analysis was performed. In order to validate the results of virtual simulations, practical load tests were carried out in accordance with the virtual simulations. By comparison, it indicated that the results of virtual simulations were precise, and finite element method could be applied in safety inspection instead of practical load tests.
Fiber Optic Acoustic Emission Sensor System for Local Damage Detection
Authors: Zhao Na , Ding Ke Qin
Published: June 2013

The crack is easily generated in the metal structure because of fatigue. It has a strong impact on structural safety. To reduce accident and losses, it is important to detect the local damage such as active crack. The general method to detect the local damage is acoustic-emission technique. But it has the disadvantages of short distance transmission, interfered easily and so on. In this paper, the fiber optic acoustic emission sensor system is designed and developed. A lot of experiments have been done in laboratory. It is shown that the new system has long distance transmission, and has high anti-interference etc. It can meet the demand of local damage detection about the metal structure.
Structural Health Monitoring Cloud and its Applications for Large-Scale Infrastructures
Authors: Lan Cheng Ming , Liu Wen Feng
Published: June 2013

The concept and framework about Structural Health Monitoring Cloud (SHMC) for data management, data storage, safety warning and structural safety assessment are established in this paper based on the fusions of cloud computing, internet of things (IOT), and structural health monitoring (SHM). SHM plays a significant role in modern infrastructure because it provides a means to assess structural integrity online, eliminate manual inspections and may result in a transition from time-to condition-based maintenance. Also, there are many difficulties to deal with the huge amounts data for the owner of infrastructure. So the new ideas of SHMC which is provided and realized by the third part professional organization are proposed in this paper. Based on the summary of the technical characteristic of internet of things for structural health monitoring, the system requirements, architecture, and advantages of SHMC are described, and then the statues of related technology research were reviewed. The data mining and damage detection programs are embedded in SHMC platform and all collected data from acquisition system would be processed and then be used to assess the safety of infrastructures. Finally, actual applications of SHMC for large-scale infrastructures are illustrated.
Subwavelength Defect Characterization Using Guided Wave Scattering Matrix
Authors: Zheng Yang , Zhou Jin Jie , Zheng Hui
Published: June 2013

Although many imaging algorithms such as ellipse and hyperbola algorithm can roughly locate defects in large plate-like structures with sparse guided wave arrays, quantitative characterization of them is still a challenging problem, especially for those small defects known as subwavelength defects. Scattering signals of defects contain abundant information so that can be used to evaluate defects. A defects recognition method using the S-matrix (scattering matrix) was presented. S-matrices of hole and crack with S0 mode incident were experimentally measured. The results show that defects can be recognized from the morphology of 2D S-matrix chart. This method has great potential to achieve more specific parameters of small defects with sparse guided wave arrays.
A Time Reversal Imaging Method without Relying on Transfer Function for Impact and Damage Monitoring of Composite Structures
Authors: Qiu Lei , Yuan Shen Fang , Huang Tian Xiang
Published: June 2013

Composite structures adopted in aerospace structures have attracted much interest to structural health monitoring (SHM) for localization of impact and damage positions due to their poor impact resistance properties. Propagation mechanism and frequency dispersion characteristics of Lamb wave signals on composite structures are more complicated than that on simple aluminum plates. Recently, much attention has been paid to the research of time reversal focusing method because this method shows a promising advantage to give a focusing image of the structural damage, improve the signal-to-noise ratio and compensate the dispersion of Lamb wave signals. In this paper, aiming at developing a practical method for on-line localization of impact and damage on aircraft composite structures which can take advantage of time reversal focusing and does not rely on the transfer function, a new phase synthesis based time reversal focusing method is proposed. Impact and damage images are given out directly through time reversal focusing based on phase synthesis process of the signals. A SHM demonstration system is built on a composite panel of an aircraft wing box with many bolt holes and stiffeners using the phase synthesis based time reversal focusing method. The demonstration results show that this method can estimate the positions of impact and damage efficiently with a low sensitivity of velocity errors.
On-Line Health Monitoring Research on T-Joint of Main Steam Piping
Authors: Jia J.H. , Zhang H.C. , Hu X.Y. , Cai L.P. , Tu S.T.
Published: June 2013

The main challenge of long-time creep monitoring on site is a reliable sensor. In this paper, a sensing device is developed specifically for high temperature creep monitoring. And it is applied to on-line monitor the strain of material on T-joint of main steam piping. Its reliability is verified theoretically using the finite element method and experimentally by high temperature on site test. The creep damage of the T joint is evaluated basing on the creep rate sensed by the sensing device. And the residual life is predicted for the piping system using the Monkman-Grant equation. This system is useful for safety assessment procedures in thermal power plant, nuclear power plant and petrochemical industries.
LXI Precision Time Protocol Applied Research
Authors: Li Ming , Wang Chun Ping , Wang Zhi Qiang
Published: June 2013

In order to meet the real-time demands of some equipment networked test, the time synchronization techniques of ATS based traditional instrument buses are compared with the techniques of LXI ATS. Accordingly，the necessity of LXI ATS time synchronization technique study is put forward. The sorts of time synchronization techniques based on Local Area Network are analyzed. In addition, some methods which could improve the level of LXI data real-time communications are presented. Afterwards, technique realizations of PTP are studied in detail. Local Area Network techniques and IEEE 1588 Precise Time Protocol are adopted in the LXI Automatic Test System which designed in the paper, and the level of time synchronization precision in the system is improved.
Motion Control Technology Research Based on PVT Algorithm
Authors: Fan Jun
Published: June 2013

This paper discussed the mathematical nature of the motion control PVT motion patterns, derived the control algorithm, presented the fitting error analysis, proposed curve fitting scheme in the PVT motion mode. The simulation results show that this scheme can obtain more accurate target motion trajectory curve.
Frame Work of LV-UTHM: An ISO 14649 Based Open Control System for CNC Milling Machine
Authors: Yusof Yusri , Latif Kamran
Published: June 2013

Open control is a well known term in the field of machine control. This paper presents a framework of STandard for the Exchange of Product Data-compliant Numerical Control (STEP-NC) based open control system for Computer Numeric Control (CNC) milling machine. Real time control, high efficiency and low cost have been the main focus of proposed open control system. A method that develops open control system is composed of hardware and software platforms. Proposed open control system helps in to improves the quality of machining, increase productivity, saves times, avoid machine accidents, increase tool life and enables monitoring/inspection/control system for various machining processes and parameters online/offline.
The Research of Oil Pressure Fluctuation Influence to Rolling Mill Control Precision
Authors: Chen Chun Ming , Liu Ya Jun , Zhang Yun Xia , Guo Dan Xia
Published: June 2013

Oil source made up of constant pressure variable displacement pump, accumulator, and pipeline is widely used to provide stable pressure for electro-hydraulic control system in practical engineering. Based on the experiment, the relationship between initial charging pressure & volume of the accumulator at inlet of the servo valve and control precision is analyzed in detail, and coupling rules between the load variation and the pressure fluctuations of oil-source are obtained, the rules can give reference for selecting initial charging pressure & volume of the accumulator according to the requirement of system control precision, which can further improve control precision and product quality by optimizing equipment parameters.
Design of the Lower Extremity Rehabilitation Robot Communication System
Authors: Guo Qing , Jiang Dan , Sun Sa
Published: June 2013

According to this analysis, we designed a scenario on lower extremity rehabilitation robot communication system based on CAN bus and efficiently solved the problems of low signal processing, computing power and data transfer rate ability for the traditional means of communication of RS232 and RS485.The research deals with the characteristics of communication systems and topological structure, and specifically, with CAN bus protocol design and hardware and software implementation aspects of Communication System designing for some robot sensor.
The Design of Neuro-Fuzzy Controller for Active Suspension System
Authors: Li Jun Wei , Shen Hai Yan , Sun Huian
Published: June 2013

A neuro-fuzzy control (NFC) system is developed to control the suspension system of vehicle due to its nonlinearity and parameter variations. A neural network (NN) is used to adjust the premise parameters and the consequent parameters in fuzzy logic control (FLC). Simulation results by using NFC are compared with those of the conventional PID controller and passive suspension system. Based on the simulation, it can be concluded that the neuro-fuzzy controller shows a good performance in both passenger comfort and vehicle handing in comparison to the conventional PID controller and passive suspension system.
Modelling of the Ventilation Unit for a Stand Alone Solar Collector
Authors: Canaletti Jean Louis , Cristofari Christian , Notton Gilles
Published: June 2013

The work described in this paper concerns a part of the modelling of a standalone air solar collector producing low temperature heat. The main role of the system is to avoid freezing temperatures and to reduce humidity in a room or in an unoccupied home during a long time, with only solar radiation. In view to dispose an essential sizing tool for this solar collector, we developed a mathematical model based on energy balance equations and on the characteristics of the system. This model allows simulation of the aerolic and thermal behaviour of the solar collector. It was validated using experimental data collected by telemetry in six operating sites. We present here the behaviour model of the ventilation unit part.