bluuebunny/crossref_metadata_2025 huggingface dataset:
A Method of Dispersion Compensation Based on Warped Frequency Transform
Authors: Fu Shang Chen , Lv Zhen Jian , Ma Ding , Shi Li Hua
Published: July 2013

The use of Lamb waves for structural health monitoring (SHM) has complicated by its multi-mode character and dispersion effect, which impacts the damage positioning and high-resolution imaging. The group velocity dispersion curves of Lamb waves can be employed to warp the frequency axis, and then to establish warped frequency transform (WFT) to process Lamb waves. In this paper, received signals are directly compensated with warped frequency transform to suppress dispersion, and a new imaging method is proposed based on warped frequency transform. The propagation of Lamb waves in damaged aluminum plate is simulated by finite element software ABAQUS, results show that warped frequency transform can effectively compensate dispersive wave-packets, and high-resolution damage imaging can be obtained by the proposed method.
A Weighted Naive Bayes Algorithm Based on the Attribute Order Reduction
Authors: Zhou Xi , Luo Ke
Published: July 2013

Naïve Bayes classifier was generally considered as a simple and efficient classification method. However, its classification performance was affected to some extent because of the assuming that the conditions properties were independent of each other. By analyzing the classification principle and improvement of Bayesian and the Attribute Reduction of Rough Set, this paper proposed a Naïve Bayes algorithm that the attribute order reduction and weighting were improved simultaneously. Experiment results demonstrated that the proposed method performed well in classification accuracy.
Design of a Multi-P3-AT-Robot Platform Using Ad Hoc Network
Authors: Li Yong , Xiong Guang Ming , Liu Peng , Sun Yin Jian , Gong Jian Wei
Published: July 2013

Multi-robot system is one of the important study topics of robotics. Many near field wireless communication technologies are used in different systems nowadays. In this paper, the Zigbee module is chosen as the wireless communication solution for Multi-P3-AT-Robot Platform since it can build the Ad Hoc Network. Tests of the combination of different network topology structure and data sending mode were made using two platforms and three platforms. According to the test results and the application requirement, the star network topology and the broadcasting mode is configured in the Zigbee module which is used to build the Ad hoc network for multi-P3-AT-robot platform. Through the ability of self-organizing network, each platform can realize data interaction with other robots, and task planning & coordination between platforms. Moreover, the communication between each two platforms will not be affected although the connection may change due to the movement of the platform.
Study of the Virtual Campus Ramble for the Android Mobile Phone
Authors: Zhong Qing , Xu Yi , Yu Xiao Han , Peng Jie Ru , Xia Yu , Zhao Yang
Published: July 2013

With the arrival of the era of 3G mobile communications, people need not only to meet the call, SMS service, and begin to pursue more realistic visual and interactive experience. The paper developed the virtual campus roaming system of the Wuhan University of Technology for the Android platform based on the Baidu map of the mobile version of the API (Android) and OpenGL ES development tools. Users may select the Campus location of Wuhan University of Technology in the Android mobile phone and can query the campus road, the corresponding function architecture position and 3D virtual scene graph; at the same time they can accept the new information campus. The system of design cannot only provide users with a conventional mobile map services, but also show their location of the 3D scene graph. It is more intuitive to display location information, enhance the campus scenery and culture readability.
Intelligent Instrument's Course Design Based on Visual Instrument
Authors: Xu Yang , Lv Hong Xing , Xie Ying , Yao Rong Xiao
Published: July 2013

ntelligent instrument is an important learning content for the college students whose major is Technique and Instrumentation of Measurements. The Course design about intelligent instrument based on NI ELVIS platform is described in this paper. Students made a kind of virtual frequency meter by building signal conditioning circuit on NI ELVIS platform and programming by LabVIEW application software. The design of virtual frequency meter has a good function, a good promotion, and has practical value as well .The design course has been carried out in the actual teaching activities for two years, more than 200 students successfully completed the goal of teaching.
Research on the Image Detection of Moving Objects in Natural Environment
Authors: Jian Xiao Gang , Xu Xiao Xiang , Li Xiao Hua , Shi Lai De
Published: July 2013

This paper proposed a new solution to the situation that the moving objects detection in natural environment might be disturbed by some natural conditions, such as wind, light, etc. Firstly, the background image was modeled with Gaussian mixture models, to eliminate the interference of some slight and cyclical movements caused by wind, like branches swinging. Secondly, the foreground was segmented through background subtraction, and the background model was updated to adapt to the gradual change of illumination. Finally, the shadows of moving objects were detected and removed in HSV color model, meaning that the detection was completed. The experiment verified that the solution above can effectively realize the preliminary detection of moving objects in natural environment.
The Application of Internet of Things in Smart Grid
Authors: Zhao Li Jun , Zhang Fei Zhou , He Han Xian
Published: July 2013

With the rapid development of science and technology, the concept of smart grid is proposed and continuously developed. Its inevitable to apply the current technology of Internet of Things (IOT) to Smart Grid, to make peoples access to power resources more intelligent, convenient. Considering on the actual situation, this paper starts from the smart grid concept, then makes an illustration on the relationship between the Internet of Things and Smart Grid, and detailed application analysis on seven actual cases about Things Networkings using on the Smart Grid, at last the elaboration of the development prospects and the importance of the combination of IOT and Smart Grid.
Application Analysis of IOT Based on Beidou Navigation System
Authors: Xiao Wen Jun , Zhang Fei Zhou , He Han Xian
Published: July 2013

With the governments strongly support and promotion, IOT (Internet of Things) has become popular in our life nowadays. In order to build China national IOT application technology, in this paper, IOT application architecture based on Beidou navigation system is presented and analyzed in detail. And the IOT network layer, which consists of wireless sensor network, cellular mobile communication network and Beidou navigation system, is mainly expounded. This architecture not only expands coverage area of IOT, but also enhances reliability and economical efficiency of the whole IOT system. Thereby, it can bring more new applications in IOT field.
A Novel Method for Solution of the Division Operation on ARM7 Microcontroller
Authors: Wu Guang Wen , Huang Xiang Sheng , Hu Wen Long
Published: July 2013

Before architecture V7, the hardware of ARM microcontroller family does not support division operation. Although it is easy to program on ARM processors with C language which can implement division operation with library functions, the procedure has much trouble and the efficiency is lower when the function code written in C language is called in assembly program. This paper introduces an algorithm for the division operation on ARM7 processor and also gives corresponding subroutines which can be used directly in assembly program design. The algorithm is similar to the operation theory of the digital circuit which uses subtraction circuit to do division operation. The given subroutines can deal with the division operation between two 32-bit unsigned integers and the division between a 64-bit unsigned integer and a 32-bit unsigned integer.
Construction Research of Exercise Prescription Expert System
Authors: Gou Ming , Yang Jing
Published: July 2013

The test database of students' health is being analyzed with the information processing tool of artificial intelligence Expert System in order to create a scientific model of students Exercise Prescription in the end. It aims at starting with studying every student to realize an optimized development for the quality potential of every student.
Implementation of Advanced Planning and Scheduling System in Manufacturing Industries
Authors: Hagazi Hadgu Haftu , Guo Xiao Jun
Published: July 2013

Advanced planning and scheduling system's (APS) implementation and operation process for elaborating a production schedule in a production environment similar to what is found in industries. The main characteristics and restrictions of a real production environment were thus considered, such as multi-level structure products, production routes with sequential, parallel and alternative operations, more than one resource per operation and alternative resources. In terms of results, this study provides an overview of the main steps involved in the implementation and operational process of an APS system in an industry, providing an important indicator for choosing and using this sort of system. The expectations of APS systems have been high, both from academia and industry in the subject area of manufacturing planning and control. Relative the massive interest there has not been much written about how APS systems are used in practice and what effects an APS approach really results in.
Optimization of Aerospace Launch Mission Security Index System Based on Factor Analysis Method
Authors: Zhi Wen Shu , Ma Xin Hui , Cui Bao , Chen Jing Peng , Li Wei
Published: July 2013

Aerospace launch mission security evaluation relates to multiple index factors and there is a certain correlation between each factor, which results in many issues such as index information overlap, structure of the index system complex and evaluation inaccurate. In this paper, use the human factor of aerospace launch mission security index system as the example, apply the SPSS software to analyze the indexes of human factor, reduce the lots of original indexes into several principal factors that can express the information of original indexes. In this way, simplify the original index system structure, realize the optimization of index system and provide a reference for the establishment of a scientific index system.
Research on Design of Equipment Support Training Development under Informationization
Authors: Wen Jin Hua , Zhang Wen Yu , Chen Yan
Published: July 2013

Under informationization, with the development of the technology, equipment becomes more and more complex, which has placed an increasing demand on the innovation of the design theory and methods to equipment support training. However, the methodology to develop the equipment support training is still in the traditional way. There is a lack of the general design on the training system and the systematic analysis of the training requirements. Based on the ISD process, using the IDEF0 modeling technique, a design theory framework for the design of equipment support training is proposed. The theory framework provides a basis for the further study on the establishment of the effective, cost efficient equipment support training system.
Morphologies of P3HT and P3HT/PCBM Thin Films Prepared by Drop Casting and Spin Coating
Authors: Miwa Masaya , Furuhashi Hideo
Published: July 2013

P3HT and P3HT/PCBM organic films are prepared by drop casting and spin coating and are used to fabricate solar cells on ITO. The solar cell properties are investigated by UVvisible absorption spectroscopy and X-ray diffraction (XRD). and their morphologies are discussed. The results indicate that the molecular chains of the P3HT film prepared by drop casting are perpendicular to the substrate, whereas those of the film prepared by spin coating are oriented parallel to the substrate. P3HT/PCBM films are prepared by spin coating using different PCBM/P3HT ratios.
Study and Analysis on Sediment Movement under Storms
Authors: Bian Shu Hua , Liu Jian Qiang , Li Xiao Juan , Wang Jing Chuan
Published: July 2013

Recent works on sediment movement under storms were studied and analyzed comprehensively. It was found that the key point to improve researches on sediment movement under storms was the on-situ measured data, which could be obtained by combined usage of automatic sediment sampler and the optical automatic instruments, and it was very important to seek or make relatively small and lightweight automatic sampling devices to sample the water and suspension offshore with a depth of 0-10m, where the sediment movement was very active.
An On-Line Monitoring System of SF6 Decomposition in Electrical Devices
Authors: Shi Hui Xuan , Qian Jin , Liu Xiao Bo , Liu Xiao Li
Published: July 2013

This work is dedicated to the development of an on-line monitoring system of SF6 decomposition in electrical devices (SF6DcpMS) in order to evaluate the health condition of the devices in real time. The feature decomposition, SO2, and SF6 purity are continuously monitored.
Considering the oxidation-reduction reactions of SO2 electrochemical sensor during detection, the methodology of utilizing the air in the electrical device is proposed based on the tests of serving devices. And it is proved via tests that electrochemical sensors can be applied into SF6DcpMS. Besides, infrared detector is employed to detect SF6 purity.
Sampling method of SF6 in electrical devices is described. There are three keys in the sampling device design for the on-line monitoring system:
-- Sensor working environment: The rating pressure is one atmospheric pressure for sensor working. Therefore, a gas chamber is constructed, in which the suitable environment for sensor is completed via a pressure regulator and a pressure sensor. At the same time, an appropriate control method is scheduled. Gas in the chamber is continuously replaced with that in the electrical device to ensure detection accuracy within an acceptable range.
-- SO2 adsorption feature: The monitoring accuracy is seriously influenced by the adsorption feature of SO2. As we known, flowing gas can decrease SO2 adsorption feature. So, a micro bump is designed in the gas chamber, which can ensure the gas flowing at the speed of 200ml/min.
-- Sample gas back into electrical devices: In order to avoid the gas cause harm to humans, the gas leakage is not allowed in the on-line monitoring system, and the sample gas must be sent back to the electrical device after detection is accomplished. Sample gas back into electrical devices is realized via a bump and a check valve with adjustable cracking pressure.
The first SF6DcpMS in China has been successfully put into service in Zunyi substation, and its performance has been proved out.
Application of Fractal Theory to Process Radioactive Prospecting Data
Authors: Zhao Ning Bo , Fu Jin , Zhang Dong Hui , Zhang Chuan , Hao Wei
Published: July 2013

The distribution of radioactive geophysical and geochemical exploration data is very complex ,it has multifractal characteristics, using the fractal theory to research conforms to the data distribution. The author selected some methods of fractal theory for study and compared with the traditional method,used content-area method to process gamma-spectrometric data of the carbonate-siliceous-pelitic type uranium deposit, it can reduced abnormal area and didnt omit ore occurrences, this will reduce the exploration workload;used fractal trend-surface method to process activated carbon radon measurement data of the sandstone-type uranium deposit, it can effectively strengthened the weak anomaly, and found new ore-generating anomaly area.
The Identification of Green Tea Based on Feature Extraction
Authors: Zhang Rong Xiang , Zhang Wei , Zhao Xiao Hui , Zhang Yan Wei , Li Guang , Li Xiao Wei
Published: July 2013

In order to identify the green tea quickly and accurately, the infrared spectra of teas measured by Fourier transform infrared spectroscopy are analyzed by using informatics method of feature extraction in this work. By comparing the different characteristic bases found by different feature genes of different tea samples, it is concluded that when green tea, yellow tea and white tea are chosen to constitute the standardized spectrum data matrix, and its first and third feature gene are selected to build characteristic basis, the green tea can be visually distinguished and the same samples have a very good aggregation. While when the characteristic basis is built by the first and second feature gene or the second and third feature gene, or the samples which are used to make up of standardized spectrum data matrix are all green tea, the recognition effect of green tea is bad. A linear arbiter of green tea is set up according to neutrality line principle on the above effectively characteristic basis, when all samples are projected onto the characteristic basis it is shown that all the green tea fall on the right of arbiter, and all not green teas are on the left of arbiter, consequently, the green tea can be identified.
The Real-Time Monitoring and Management System of 8 Channels DVB-C Transport Stream Monitor
Authors: Song Jin Bao , Wan Jin Liang , Zhang Qin
Published: July 2013

Our workgroup have exploited 8 channels DVB-C transport stream monitor which accords with the standard of our country. The most notable characteristic is that this DVB-C transport stream monitor is high capacity transport stream monitor. It can monitor eight channels digital television program at the same time .There is no enterprise which can produce 8 channels DVB-C transport stream monitor at present.The real-time monitoring and management system is a very important part of 8 channels DVB-C transport stream monitor. This paper introduces the significance and theory of DVB-C transport stream monitor. Then, it gives an implementation of the real-time monitoring and management system of 8 channels DVB-C transport stream monitor.
Measurement of the Wheel Valve Hole Position Based on Linear CCD
Authors: Wang Fang , Li Chang Chun , Sui Peng Jie
Published: July 2013

In the traditional spraying production line, the wheels are mounted on the catenary hook. The location of the wheel valve hole is by artificial visual. Not only the workers labor. This paper puts forward the technology of line scanning the wheel valve hole position based on the linear CCD. The method is unfolding the wheel circumference image into the two-dimensional plane image. Then we use the image processing and matching technology to measure the wheel valve hole position.
Topological Characteristics of Coherent Structures in the Turbulent Boundary Layer Measured by Tomo-PIV
Authors: Tian Hai Ping , Yang Shao Qiong , Jiang Nan
Published: July 2013

Database of time series of the instantaneous three-dimensional three-component (3D-3C) velocity vector field, measured by tomographic time-resolved PIV(Tomo-PIV) in a water tunnel, was analyzed to investigate spatial topologies of coherent structures in the turbulent boundary layer (TBL). A new concept of spatial locally averaged velocity structure function of turbulence is put forward to describe the spatial dilation or compression of the multi-scale coherent structures in the TBL. According to the physical mechanism of dilation or compression of multi-scale coherent vortex structures in the turbulent flow, a new conditional sampling method was proposed as well to extract the spatial topological characteristics of physical quantities of coherent structures, such as fluctuating velocities, velocity gradients, velocity strain rates and vorticity during the bursting process in the Tomo-PIV database. Furthermore, the anti-symmetric structures are the typical spatial topologies characteristics for the velocity gradients and vorticity during coherent structures burst.
High Voltage Ratio Measurement Base on Two-Digital-Meters External Synchronous Trigger Mode
Authors: Lin Fei Peng , Zhang Huang Hui , Shao Hai Ming , Li Yan Qiang , Li Wen Feng
Published: July 2013

This paper researches DC high voltage ratios measurement method, which based on two-digital meters with external synchronous trigger mode. Through experiment, the measurement method can overcome the effect of high voltage power supply ripple and drift. The type A uncertainty of this method could decrease more than 10-100 times.
Research on Combined Tests to Entry Disturbed Zone (EDZ) of Rock Masses in Steep Coal Seams
Authors: Shan Peng Fei , Lai Xing Ping , Cao Jian Tao , Li Lin Yao
Published: July 2013

For high production of raw coal in steep coal seams, it is crucial to obtain engineer demands by enhancing section height in horizontal caving. However in-situ operations copious methods like pre-blasting was always needed to broken top-coal which was difficult to excavate commodiously and safely. Explosive wave caused by pre-blasting would destroy stress balance around entries, and definitely result in entry disturbed zone (EDZ) being loosen zone. Aimed to determine boundary of EDZ and keep rock mass in both entries steady, combined tests to EDZ of rock masses of head entry of +600 east-side stope of 43# coal seam was done in Wudong Colliery as research background with ground penetrating radar (GPR) and mono-hole ultrasonic wave experiment. It indicated that scope of EDZ here was 2.2-2.3m, which would be prerequisite to optimize supporting scheme in field.
Study on the Driving Cycle and NOx Emission Characteristics of City Bus
Authors: Lin Meng Yu , Qin Kong Jian , Yan Fu Wu , Gao Jun Hua , Wang Chang Yuan
Published: July 2013

Using portable emission measurement system, an experimental study on the NOx emission characteristics of city bus in practical operation are conducted, the eigenvalue of driving cycle are analyzed by short trip method. The results show that: idling time accounted for 20.392%, ratio of acceleration which between-0.5 m/s2 and 0.5 m/s2 accounted for as high as 83.314%.NOx emissions are greatly affected by the speed of vehicle: the instantaneous rate and total amount of NOx emission under high speed are much higher than low speed, the average urea injection under high speed is 3.5 times than low speed. When the vehicle speed is between 20-25km/h, the average emission rate of NOx is about 0.074g/s,while the time proportion of urea injection is under 40%;while the vehicle speed is above 55km/h, the average emission rate of NOx is about 0.025g/s,while the time proportion of urea injection can reach as high as 80%.
The Overviews of Application of Three-Dimensional LiDar Technology in Operation and Maintenance of Overhead Transmission Lines in China
Authors: Chen Jin Mu , Wang Xun Feng , Lu Xian Feng , Zhang Chun Lin , Wang Wei , Wang Ren De , Shen Xiao Jun
Published: July 2013

The paper briefly reviews the operational principles and commercialized conditions of airborne three-dimensional (3D) LiDar and terrestrial 3D LiDar. And then the representative functions of 3D LiDar that are developed for the operation and maintenance of overhead transmission lines (OTL) are described in detail. Besides, the problems associated with the process of applying 3D LiDar to OTL are analyzed. It is pointed out that it is necessary to make improvement to several aspects, including new functions development, standardization of application approaches and the simplification of data processing.
Measurement and Evaluation of Ferrite Materials Surface Quality
Authors: Liu Wen Long , Lin Bin , Sun Li Peng
Published: July 2013

A measurement on the topography and 3D roughness parameters of the ferrite surface has been taken by using a 3D optical profiler. Based on the analysis of the experimental data and the contradistinction between the ferrite devices with different quality and service performance, one preliminary conclusion has been obtained that the surface quality of ferrite materials can be evaluated by using the 3D roughness parameters, and this method is applicable and stable. With qualitative and quantitative analysis, it could be predicted that the surface quality has a direct influence on the service performance of ferrite devices.
Study on Photo-Degradation of Poly(ethylene terephthalate)/SiO2/TiO2 Hybrid Composites by Sol-Gel Method under Ultraviolet Radiation
Authors: Zhu Jiang , Liu Xiang , Xu Qiang , Ren Qin
Published: July 2013

Poly (ethylene terephthalate) (PET)/SiO2/TiO2 hybrid composites were synthesized via the sol-gel method in the presence of tetraethylorthosilicate (TEOS) and tetrabutyltitanate (TBT). The formation of Si-O-Ti bonds in the resulting products was confirmed by Fourier transform infrared spectroscopy (FTIR) analysis. The Photo-degradation properties of hybrid composites were investigated under the ultraviolet radiation. And the change of the intrinsic viscosity for the hybrid composites was measured using an Ubbelohde viscometer after the photo-degradation.
The Investigation of a New NO2 OTFT Sensor Based on Heterojunction F16CuPc/CuPc Thin Films
Authors: Zhang Bo , Tai Hui Ling , Xie Guang Zhong , Li Xian , Zhang Huan Na
Published: July 2013

The bottom contact heterojunction organic thin film transistors (OTFTs) based on n-type hexadecafluorophthalocyaninatocopper (F16CuPc) and p-type copper phthalocyanine (CuPc) bilayer were developed by the vacuum evaporation, which were applied to detect nitrogen dioxide (NO2). The sensors with different thickness (5nm, 10nm, 15nm and 20nm) of CuPc were prepared to investigate the influence of CuPc film thickness on the properties of devices. The results showed that four parameters including the source-drain current (IDS), grid current (IGS), threshold voltage (VT) and carrier mobility (μ) changed in a few seconds when the sensors were exposed to the atmosphere of NO2. Further more, IDS and IGS presented extremely similar variation trend. So the grid current would be taken as a new parameter to reveal the response characteristic of OTFT gas sensor. By comparison, the device with 15nm CuPc thin film exhibited the optimum electronic and gas sensing properties.
Annealing Temperature Effect on the Photoluminescence Properties of Er-Doped Silicon-Rich Silicon Oxide Films
Authors: Li Chang Qing , Liu Pei Jia , Wang Yong Mei , Murakami K.
Published: July 2013

Er-dispersed silicon-rich silicon oxide (SRSO:Er) films have been fabricated by pulsed laser ablation technique. After deposition, the films were annealed in Ar ambient at different temperatures for 30 min to generate SiO2films containing Si nanocrystals (Si-nc) and Er ions. The relationship between Er photoluminescence (PL) intensity and annealing temperature was investigated by PL spectrums analysis at room temperature. Transmission Electron Microscopy (TEM) and Energy Dispersive X-ray Spectrometer (EDS) were used to observe the samples. Experimental results show that high-density Si-nc generate when the annealing temperature increases to 1000°C, however, PL intensity of Er decreases due to Er atoms segregated out in SiO2film and formed large particles.
Study on Synthesis and Synergetic Effect of Novel Bio-Based PVC Thermal Stabilizer from Dimer Fatty Acid and Polymerized Rosin
Authors: Li Mei , Jiang Jian Chun , Li Shou Hai , Huang Kun , Xia Jian Ling
Published: July 2013

Calcium zinc monomer salts were prepared via simple one-step double decomposition reaction with the aid of DA and PR as raw materials. FTIR analysis demonstrated that calcium zinc monomer salts of DA and PR have been successfully synthesized. The synergistic effect between DA-based and PR-based calcium zinc monomer salts, the effects of addition amount of DOP and the synergistic effects between epoxidized soybean oil (ESO) and calcium/zinc stabilizers on thermal stability of PVC were analyzed by means of the Congo-red paper, torque rheometer and thermogravimetric analysis methods. The results showed that preferable synergistic stabilizing effects were observed when DA calcium/zinc salt and polymerized rosin calcium/zinc salt were used together. In addition, appropriate dosage of DOP could inhibit the thermal degradation of PVC, and ESO also have certain synergetic effect with prepared novel calcium/zinc stabilizers.
A Simple Route for the Synthesis of Monocrystalline Rutile TiO2 Nanorods
Authors: Yang Yan Qiu , Fu Guo Zhu , Liu Guang , Wang Bin , Wei Gang , Deng Li
Published: July 2013

A new methodology was developed to synthesize uniform rutile TiO2 nanorods. Rutile (TiO2) nanorods of length L200-300nm and diameter D15-20nm have been synthesized through a seed-mediated growth process by the additional thermohydrolysis of SnCl4 in concentrated acid aqueous solutions. The XRD show that the additional SnCl4 can accelerate the crystallization of the rutile due to the SnO2 acted as the nuclear, avoiding the slow processing of self-nucleation of the rutile TiO2. The HRTEM suggest that the crystal growth is preferential in the [11 direction resulting the formation of rod-like nanocrystals.
Fabrication and Characterization of Vitamin E TPGS Loaded Silk Fibroin/Hyaluronic Acid Nanofibrous Scaffolds
Authors: Ji Li Li , Li Qiao Ling , Yang Zeng Hu , Hu Wei Jing , Zhang Kui Hua
Published: July 2013

Vitamin E d-alpha-tocopheryl polyethylene glycol 1000 succinate (VE TPGS) loaded silk fibroin (SF)/ hyaluronic acid (HA) nanofibrous scaffolds were fabricated by means of electrospinning to biomimic the natural extracellular matrix. Scanning electronic microscopy (SEM) results indicated that electrospun VE TPGS loaded SF/HA nanofibers were ribbon-shaped, the width of nanofibers decreased slightly with the addition of VE TPGS to SF/HA blended solutions. Fourier transform infrared (FTIR) spectroscopy and Wide-angle X-ray diffraction (WAXD) curves revealed that VE TPGS did not induce SF conformation from random coil to β-sheet. SF conformation converted from random coil to β-sheet after being treated with 75% ethanol vapor. In vitro release studies confirmed VE TPGS had no obvious burst release and present good release behavior.
Research of Sericite in Mineral Technology
Authors: Nie Yi Miao , Wei Shao Bo , Lu Xiao Long , Liu Shu Xian
Published: July 2013

Based on the crystal structure research of sericite and muscovite in mineralogy, research of sericite was done by the analysis of XRD,IR ,SEM and microscope research in its color, chemical composition, gloss,and other properties. Applications were summarized in this paper and little difference was discussed between sericite and moscovite.
Preparation and Characterization of PbO2 Electrode Modified with Praseodymium
Authors: Li Shu Dong , Wang Feng Wu , Xu Mai , Fang Wen Yan , Yan Xiao Yun
Published: July 2013

The Ti/PbO2 electrode doped with Pr2O3 was prepared by the electrodeposition method. The X-ray diffraction (XRD) analyses indicated the crystal particles size of Ti/PbO2/Pr2O3 electrode was diminished due to the incorporation of Pr2O3 into the film of PbO2. The scanning electronic microscopy (SEM) revealed that Ti/PbO2/Pr2O3 electrode had smaller particles and larger active surface. The measurement of cyclic voltammograms (CV) revealed Ti/PbO2/Pr2O3 electrode had a better electrochemical properties comparing to Ti/PbO2 electrode. The bulk electrolysis demonstrated that the Ti/PbO2/Pr2O3 electrode presented excellent electrocatalytic performance for degradation methylene blue.
Simulation and Experimental Research of Bearing Crown Roller-Raceway by Non-Uniform Time Effect Electrochemical Mechanical Machining
Authors: Zheng Xing Hua , Wei Ze Fei , Tao Bin
Published: July 2013

Electrochemical mechanical machining (ECMM) was employed to process the bearing crown raceway to solve the traditional problems. Firstly, a mathematical model about the electrochemical machining with non-uniform time effect of crown raceway was created. The crown shape obtained at different cathode shape was analyzed. The cathode shape was then numerical simulated and acquired according to the anode crown. Finally, the bearing raceway was processed via ECMM with non-uniform time effect using the crown cathode, improving the surface quality and obtaining a surface with certain crown.
Application of High Performance Electro-Hydraulic Synchronous Servo System on NC Broaching Machine
Authors: Chen Guo Jin , Ni Jing , Liu Ting Ting , Xu Ming
Published: July 2013

Aiming at the lower performance, accuracy and efficiency of the existing motion control process for the traditional broaching machine, the paper studies the high-performance dual-hydraulic synchronous servo drive control technology. The synchronous electro-hydraulic servo system forms the closed loop control by the detection and feedback of the output quantity. It eliminates and restrains largely the influence of the adverse factors to obtain the high-precision synchronous driving performance. The numerical control system based on the real-time error compensation and the intelligent control to the auxiliary machinery is developed. It is used for the CNC broaching machine to make the steady-state synchronous displacement error of the double cylinders be ≤ 0.5mm.
Research on the Selection and Evaluation Content of Green Materials
Authors: Lou Xi Yin
Published: July 2013

In this paper, the material selection in green design is the product design as far as possible to choose green materials; green material selection must be strict with. Determine the choice principle of the green material, green material properties and evaluation of the content, and do some exploration of green material selection.
A Vibration Monitor System Design for Bridge Model
Authors: Lv Hai Feng , Zhao Jun Fan
Published: July 2013

Structural monitoring systems using MEMS sensor and labview software have the potential to serve as low-cost alternatives to commercially available cable-based monitoring systems. This paper describes a sensing prototype system specifically designed for bridge monitoring applications. To validate the performance of the prototype system, a micro heat convective accelerometer is installed on the model bridge. A labview program is designed for converting, storing and processing the bridge vibration signal which acquired from the data acquire card. Prior to the validation experiment, a calibration test is carried out and the sensitivity is measured to be 650mV/g. The acceleration response of the bridge is recorded by the designed monitoring systems.
Research on Harmonic Current Amplification of Parallel Capacitors in a 6kV Substation
Authors: Zhang Zhan , Guo Na
Published: July 2013

This paper investigated the cause of the harmonic current amplification in nonlinear load in a 6kV substations power supply system. The paper proposed that reactors could be series connected in the capacitors by-pass to restrain the amplification. The result from field practice showed that this method could overcome the harmonic current amplification efficiently.
Sensitivity Analysis in Transient Rotor Current Model and Control of DFIG during Voltage Sags
Authors: Wang Ying , Zou Zhi Ce , Xiao Xian Yong
Published: July 2013

The purposes to improve low voltage ride through (LVRT) capability of double-fed induction generator (DFIG) is to reduce rotor over-current during voltage sags. The rotor transient characteristic and its influencing factors are considered. The transient rotor current model is studied in detail. Then, the influencing degrees of structural and state parameters are determined. By sensitivity analysis, the influence degree is evaluated quantitatively. The simulation results have shown that the proposed method can provide theoretical basis to improve LVRT capability of DFIG..
AC Square-Wave Arc Model and Analysis of Characteristics Waveform
Authors: Chen Jun , He Kuan Fang , Zhang Zhuo Jie , Li Qi
Published: July 2013

This article establishes an AC square-wave SAW arc model, and the arc characteristic of the AC square-wave is analyzed by the model. The model uses the arc voltage as the feedback of closed-loop control considering the characteristic of AC wave. The AC square-wave arc is described by the first-order differential equation. A time constant can be draw from this model, which shows the self-regulation ability of the arc. The impact of the AC square-wave SAW parameters on the current and voltage waveform can be obtained from this model. The relationship between arc stability and welding parameters can be discussed by the model. The research provides guidance for the AC square-wave submerged arc welding arc closed loop control strategy.
Algorithm Design and Implementation of Dynamic Star Simulator
Authors: Zhao Xiao Fang , Liu Guang Bin , Liu Chao Shan
Published: July 2013

In order to realize the simulation testing and calibration of star tracker in the lab, a simulation algorithm for dynamic and celestial sphere star image was proposed. This algorithm could complete simulation of star image at any time and any visual axis point, also could realize in-orbit simulation according to a given track. A new method of space district dividing was also presented in order to improve the traditional method of space district dividing by ascension and declination, fully considered declination arc length gradually shortened with latitude increasing. It can remarkably enhance the updating frequency simulation star image.
Time-Arrival Location of Seismic P-Wave Based on Wavelet Transform
Authors: Liu Xiao Hong
Published: July 2013

The automatic pick of seismic first arrivals is a foundational problem in Seismic Exploration. Picking the first arrival of P-wave is an important problem in the seismic research field. The modulus maxima of wavelet transform is a useful method for picking up the singularities of function. For applying the modulus maxima method to investigate the arrival time of P-wave, it is necessary to eliminate the influence of random factors. Based on standard deviation, we present a method to reduce the influence of random factors. Then we get an approach to detect the arrival time of P-wave by means of window energy ratio factors. The results of data analysis indicate that our method is more effective.
USB Storage Device Protection Software
Authors: Zhao Chun Yang , Wang Wei Ping
Published: July 2013

U disk is the most convenient external memory, it is simple and easy to carry, but at the same time it is best tools to bring the virus. Limiting the use of USB interface effectively not only can limit the circulation of the virus, but also can play a part in safety precautions. In fact ,the easiest way of restricting USB interface is to modify the registry,but for many users, dealing with Registry keys is a boring job,for ordinary users, the application is the best way to solve this problem. This article describes a software development process, focusing on how to use C # to modify the registry key and password protection settings, to provide some reference for computer enthusiasts.
Design of TFT LCD Driver with Large-Capacity Memory Based on the MAX-II
Authors: Zhou Guo Juan , Lv Dian Ji , Ni Shao Nian
Published: July 2013

This paper introduces the realization method based on CPLD TFT - LCD digital display controller, using CPLD implement timing generation of TFT-LCD display, image processing, and dual memory read and write rotation control function. Methods of the design can be based on the actual function of mission requirements, the interface functions of the dedicated display control chip cutting, custom display control functions, enhance system reliability and design flexibility. It can be applied to a liquid crystal display control unit, to solve practical engineering problems.
Fault Location Algorithm of the 10kV Rural Network Based on Power Frequency Communication
Authors: Su Shan , Yan Bing Sheng
Published: July 2013

A new fault locating model of multi-ports data of 10kV village distributed network has been constructed abased on the basic theory of liner circurt. by taking fault ports as boundaries, the faulted power system is divided into a symmetrical network without the faults and unsymmetrical networks employed to simulate the faults. In this modell, The locating of fault point is looked as an unknowed variable and it is included in the Zbus of unsymmetrical network. We can get it though solving the equation. The method does not need to modify the Zbus of original sequence network and easy implementation on computer, Using TWACS transmits the multiport data information, low cost and can achieve collapse go traffic. The simulation results of Matlab proved that the algorithm is effective.
Research on Remote Control Technology
Authors: Hua Xiao Yu
Published: July 2013

Computer network was mostly applicable to the operation of a single user when it was promoted in the early days in China, and all kinds of data could be processed with the aid of computer platform. Office automation system is an advanced operation trend of enterprise or individual users, and has proposed new requirements for the network control performances. Remote control technology is a new form of the Internet application, and has replaced the traditional network structure to implement increasingly more intelligent operation orders. Compared with the earlier established network work models, remote control technology owns incomparable superiorities. In this paper, the application of computer network remote control technology is discussed.
Ion Irradiation Effects in some Electro-Active and Engineering Polymers Studies by Conventional and Novel Techniques
Authors: Banerjee Somik , Deka M. , Kumar A , De Udayan
Published: July 2013

The effect of various radiations to a polymer is more complex and intense, compared to that in other materials, in view of the more complex structure and low bonding energies (5 10 eV for covalent bonds of the main carbon chain). Since the energy delivered to the polymer in most irradiations (including even beta and gamma rays of 1 to 10 MeV) exceeds this energy by many orders of magnitude, there is a high risk of radiation damage to all kind of polymers. However, engineering polymers (PC, PMMA, PVC, etc. and newer ones) as well as electro-active and other functional polymers (conducting polymers, polymer electrolytes) are finding ever increasing applications, often as nanocomposites, e.g. chemical and biomedical applications, sensors, actuators, artificial muscles, EMI shielding, antistatic and anticorrosion coatings, solar cells, light emitters, batteries and supercapacitors. Critical applications in spacecrafts, particle accelerators, nuclear plants etc. often involve unavoidable radiation environments. Hence, we need to review radiation damage in polymers and encourage use of newer tools like positron annihilation spectroscopy, micro-Raman spectroscopy and differential scanning calorimetry (DSC). Present review focuses on irradiation effects due to low energy ions (LEIs) and swift heavy ions (SHIs) on electro-active and engineering polymers, since gamma-and electron-beam-irradiations have been more widely studied and reviewed. Radiation damage mechanisms are also of great theoretical interest. Contents
Spectroscopic Investigations of Radiation Damage in Glasses Used for Immobilization of Radioactive Waste
Authors: Mohapatra M. , Tomar B.S.
Published: July 2013

Borosilicate based glass formulations have been found suitable for vitrification of high level nuclear waste (HLW) generated during the reprocessing of spent nuclear fuel from nuclear reactors. These glasses possess desirable properties like high chemical, mechanical, thermal and radiation stability for HLW storage. Also, the amorphous nature of the glass helps accommodate the waste containing a variety of elements easily. Because of the presence of the radioactive components, such as, fission /activation products and minor actinides present in the waste, the glass containment experiences radiation damage that can significantly alter the glass structure which may influence their long term leaching behavior. Spectroscopic techniques provide direct and non-invasive method for investigating this radiation damage in the glasses. The present paper gives a glimpse of the current status and issues regarding the investigation of radiation damage in the glass matrices.
Swift Heavy Ion Induced Modification in Physical Properties of Poly Methylmethacrylate (PMMA)/Nickel (Ni) Nanocomposites
Authors: Singh N.L. , Gavade Chaitali , Khanna P.K.
Published: July 2013

We have These films were irradiated with 85 MeV C-ions at the fluences of 1 x 1011 and 1 x 1012 ions/cm2. Changes in the optical, structural, dielectric, magnetic and thermal properties of (PMMA)/Ni nanocomposites of different concentrations of nickel nanoparticles (5%, 10%, 15%) due to swift heavy ion irradiation were studied by means of UVvisible spectroscopy, X-ray diffraction, impedance gain phase analyzer, SQUID and differential scanning calorimetry. Optical properties like band gap were estimated for pure polymer and nanocomposite films from their optical absorption spectra in the wavelength range 200-800 nm. It was found that the band gap value shifted to lower energy on doping with metal nanoparticles. Differential scanning calorimetry analysis revealed a decrease in the glass transition temperature upon irradiation, which may be attributed to the scissioning of polymer chain due to ion beam irradiation which is also corroborated with XRD analysis. Surface morphology of the pristine and irradiated films was studied by scanning electron microscopy (SEM). The breakage of chemical bonds resulted in an increase of free radicals, unsaturation etc. as revealed from FTIR analysis. The dielectric properties were observed to enhance with an increase in metal compound concentration as well as with irradiation dose. This may be due to metal/polymer bonding and conversion of polymeric structure into hydrogen-depleted carbon network. Zero-Field-Cooled (ZFC)/Field-Cooled (FC) magnetization and magnetic hysteresis measurements were performed using a superconducting quantum interference device (SQUID) magnetometer from temperatures ranging from 5 K to 300 K, to investigate the magnetic properties of nanocomposites. The changes in topography of surfaces were also observed upon irradiation.
A Meso-Mechanical Constitutive Model of Particle Reinforced Titanium Matrix Composites Subjected to Impact Loading
Authors: Song Wei Dong , Yang Yi Min , Ning Jian Guo
Published: July 2013

A meso-mechanical constitutive model of TiC particle reinforced titanium matrix composites (TiC/TMCs) under impact loading is established to investigate the mechanical behavior of TiC/TMCs. Based on Eshelbys equivalent inclusion theory and Mori-Tanakas concept of average stress in the matrix, the compliance tensor is formulated. By adding nucleation and growth crack models, the influences of micro-cracks on compliance tensor and damage evolution are examined. Finally, a one-dimensional dynamic constitutive model subjected to impact loading is presented to explore the mechanical behavior of TiC/TMCs.
Molecular Dynamics Simulation of Fracture Strength and Morphology of Defective Graphene
Authors: Wang Ming Chao , Yan Cheng , Galpaya Dilini , Lai Zheng Bo , Ma Lin , Hu Ning , Yuan Qiang , Bai Rui Xiang , Zhou Li Min
Published: July 2013

Different types of defects can be introduced into graphene during material synthesis, and significantly influence the properties of graphene. In this work, we investigated the effects of structural defects, edge functionalisation and reconstruction on the fracture strength and morphology of graphene by molecular dynamics simulations. The minimum energy path analysis was conducted to investigate the formation of Stone-Wales defects. We also employed out-of-plane perturbation and energy minimization principle to study the possible morphology of graphene nanoribbons with edge-termination. Our numerical results show that the fracture strength of graphene is dependent on defects and environmental temperature. However, pre-existing defects may be healed, resulting in strength recovery. Edge functionalization can induce compressive stress and ripples in the edge areas of graphene nanoribbons. On the other hand, edge reconstruction contributed to the tensile stress and curved shape in the graphene nanoribbons.