bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Intelligent Traffic Lights Based on Internet of Things
Authors: Xu Cheng Jia
Published: July 2013

Nowadays, the conversion of traffic lights is depends on fixed period way instead of the situation of the traffic. A very few areas which are using intelligent traffic lights haven't supply a systemic solution to intelligent traffic lights. The field of intelligent traffic lights is still a blank in the word. Using the technology of RFID and Internet of Things, the paper offers a systemic and particular solution to the control system of the intelligent traffic lights that is on the non-trunk and non-busy road.
Research and Realization of Monitor System of Campus Network Flow
Authors: Xu Bing
Published: July 2013

Monitor of network flow is one of the most significant ways to improve network administrative efficiency. By introducing technology relevant to network flow monitor and analyzing monitor system of campus network flow, this paper brings forth collection of Campus network flow and statistic of network flow, adopting Visual C++ 6.0 technology to design structure of this plan. This paper also points the key technology and means to realize monitor system of campus network flow and monitor system of campus network flow. It is reliable and extensible to for realization of system to improve administrative function. It is easy to realize the function of collection of campus network flow and flow statistic.
A Down Hole Safety Management ML2012 System Based on RFID Technology
Authors: Yang Cong Ya , Bai Chun Yu
Published: July 2013

This paper presents a ML2012 system of the downhole safety management system based on RFID technology downhole safety jobs. The development and production of the set of underground personnel positioning, attendance, hardware maintenance, and day-to-day management is one comprehensive application systems. Monitoring and positioning of the coal mine personnel, vehicles and disaster relief to help. It has an extremely important significance to improve mine management level to ensure the safe production of enterprise automation.
Navigating Design System with Fallback Support
Authors: Liu Zheng , Sun Bo
Published: July 2013

To assist the designer improving affection and efficiency, the development method of the navigating and fallback design system is presented. The navigating system provides not only the guidance to avoid mis-operation but also the milestones of key designing steps. With the dynamic designing tips, the unfamiliar task can be carried out efficiently and accurately. By recording the process of each designing step, the fallback design supporting strategy allows going back to the preceding designing stage. Meanwhile, the correlative interim results and dynamic designing reports are updated correspondingly. The key enable technologies to implement the method are presented. Moreover, the interactive database operation and dynamic description strategy of designing processes are illustrated, which are implemented on the basis of ADO and OLE technologies.
Interactive Virtual Globe Service System Based on OsgEarth
Authors: Zhu Jun , Wang Jin Hong
Published: July 2013

These online tools, led by the Google Earth virtual globe, are changing the way we interact with spatial data. This paper focused on how to develop a virtual globe-based interactive service system for risk assessment of dam-break in Barrier Lake. Unlike existing work, virtual globe technology was used as a medium for geographic visualization and analysis. Moreover, GIS spatial analysis and real-time interactive operation with the service system will also be implemented to support the simulation analysis of dab-break flood routing. The experimental results show that the scheme developed in this paper is efficient and feasible.
Design of Position System of Underground Mines Based on Zigbee Technology
Authors: Zhang Bao Ding , Su Bai Shun
Published: July 2013

Safety problem has been one of the major issues in coal mining process. Therefore, a perfect mine safety monitoring system is necessary. It is one of the important aspects of a safety monitoring system how to acquire the exact position information real-timely of staff underground coal mines. To solve the problem of how to acquire of miners position, based on coal mine structure characteristics, with Zigbee technology, a kind of position system of underground coal mines is designed in the paper, and the efficiency of mine safety monitoring system can be improved greatly.
Automated Alarm Based on Intelligent Visual Analysis
Authors: Li Zhi Hua , Li Qiu Luan
Published: July 2013

Abnormal event detection and automated alarm are the important tasks in visual surveillance applications. In this paper, a novel automated alarm method based on intelligent visual analysis is proposed for alarm of abandoned objects and virtual cordon protection. Firstly the monitoring regions and cordons position are set artificially in the surveillance background scenes. The forground motion regions are segmented based on background subtraction model, and then are clustered by connected component analysis. After motion region segmentation and cluster, object tracking based on discriminative appearance model for monocular multi-target tracking is utilized. According to the motion segmentation and tracking results, alarm is triggered in comparison with the monitoring regions and cordons position. Experimental results show that the proposed automated alarm algorithms are sufficient to detect the abnormal events for alarm of abandoned objects and virtual cordon protection.
VPN Packet Loss-Oriented Dynamic Control
Authors: Li Song , Zou Qian , Huang Wei
Published: July 2013

Through security protocols and virtual private network tunneling for data confidentiality, message integrity, and endpoint authentication. Users can access anywhere Internet VPN service within the group. VPN tunneling technology VPN gateway group is exposed to internal services in the Internet, malicious users are using client terminal allows officers to attack the internal services group. So we must study to the control is based on the model, combined with VPN network traffic characteristics, the topological feature model of security and safety technology and related technologies. Study on dynamic access control packet loss model in this article, you can study can greatly increase VPN security, confidentiality of data on. Due to the introduction of the concept of dynamic control, we can more accurately control the packet loss and improve system performance.
An Improved Genetic Algorithm Based on Cellular Automata
Authors: Tang Hong , Ge Yun Sheng , Pan Xiao Hai , We Shu Feng
Published: July 2013

In order to overcome the drawbacks of Simple Genetic Algorithm such as cannot get the most optimal result, low convergence speed et al. Cellular Simple Genetic Algorithm-a new genetic algorithm based on Cellular Automata-is presented in this paper. Compared with the Simple Genetic Algorithm, the experiment results show the Cellular Simple Genetic Algorithm has remarkable advantages in following aspects: reducing the search-time and improving the precise of target function.
Electronic Guide System Based on SOPC
Authors: Shi Hua Lin , Zhang Da Min
Published: July 2013

On the basis of the EP1C6Q240C8 belonging to Altera Cyclone family, a GPS electronic guide alternative system was designed by SOPC technology based on Nios II soft core processor. The system is based on GPS positioning, integrated application of embedded technology, GIS, communication technology, data acquisition and analysis techniques. Besides, this system can meet the needs of independent tour guides, for example positioning, spots introduction, destination search, path selection as well as emergency communication and so on.
Lane-Level Positioning Method for 3D In-Vehicle Navigation System
Authors: Zhang Lin , Wang Bin , Mi Xue Yu , Yi Li Fen
Published: July 2013

The objective of this study is to find an effective way to realize lane-level route guidance for vehicle navigation system. Based on the modeling of 3D map, a lane-level positioning method was presented by the way of combination of virtual differential GPS, height aiding, and collision detecting technique. GPS parameters were amended through virtual differential technology and height aiding technology by the way of elevation interpolation and least squares estimation in order to improve the output precision. Then a method of lane-level map matching was implemented in 3D digital map based on the collision detection technology. Tested by RTK technique, the method was proven to fulfill the demands of vehicle navigation systems.
Recognition of the Analog Modulation Modes
Authors: Gao Xue Fei , An Yong Li , Liu Yan
Published: July 2013

In order to recognize the mode of analog modulation with low SNR, a recognition procedure is proposed. In this procedure, the high-order feature is used as characteristic parameter for recognition. Firstly, the characteristic parameter needs to be extracted from the signal to be recognized. Secondly, the threshold values of four modulation modes need to be calculated. At last, the characteristic parameter extracted will be compared with the four threshold values, respectively. The method and order of comparison is based on decision tree classifier. By comparison, the mode of analog modulation with low SNR can be recognized accurately.
Design on Manufacturing Engineering Community Monitoring System Based on Wireless Sensor Network
Authors: Wei Shu
Published: July 2013

With the continuous development of economy and science technology, residential area shows the intelligent, humane and diverse development trends, residential security has been paid more and more attention. Community monitoring system provides security living environment for district residents, wireless sensor network technology provides an opportunity for security monitoring system and wireless network. On the foundation of wireless sensor network, constructing the intelligent community security monitoring system, the wireless communication node is designed, to carry out the study of the network communication protocol and algorithm. The experimental results show that this monitoring control system has low power consumption, functional diversity and communication stability, which is applicable to a variety of conditions of community security monitoring.
Research on Coal Mine Rescue Robot Model
Authors: Wang Xue Chen , Yue Xiao Guang , Ren Qing Guo , Zhao Zi Qiang
Published: July 2013

According to the situation of frequently domestic mining safety accidents, the basic theory and related concepts of bioinformatics' gene expression programming and multi-agent system are discussed. Related concepts of Bioinformatics and biological evolution and evolutionary computation are described in this paper. A coal mine rescue robot working model is discussed based on bioinformatics gene expression programming algorithm and multi-agent system theory.
Efficient Rebar Count Scheme Based on Image Recognition in Mechanical Engineering
Authors: Lei Yi Long , Yang Jiong Zhao , Zhang Yu Huan
Published: July 2013

Nowadays, along with the higher requirement of the customer and the standardization of enterprise management, the finished product of steel bar production must be standardization packaged by root number; management requirements of bar fixed bundle of sticks are more stringent. The artificial count is used into the most of the steel bar production recently. So there are many problems. Such as labor intensity, easy fatigue, less efficient, and error-prone. The image recognition technology for online automatic counting system for a given period of time. It also can improve the speed and make the product more accuracy. This paper mainly talks about the system composition and image processing algorithm.
The Research of CNC Machine Monitoring System Based on OPC and Configuration
Authors: Chen Ting
Published: July 2013

At present, it is hard to integrate and monitor the CNC machine tool in enterprise produce workshop. This paper proposed one kind CNC machine monitoring system scheme based on OPC technology by analyzing OPC interface technology and MCGS technology. In this scheme, establish workshop monitoring management platform in host computer by MCGS, and realize the monitoring management to bottom CNC machine. The experiment validates the users can realize the online monitor and realtime control on long-distance CNC machine through this platform. The monitoring system has good realtime and reliable stability.
Predictive Analysis on Maintenance of Mining Dump Truck
Authors: Cheng Yuan
Published: July 2013

Collected a large number of data from 2003to 2011 of maintenance cost for mining dump truck, established the mathematical models of maintenance cost and forecast of economic life of mining dump truck through the method of mathematical statistics regression analysis, found the rule of operation, maintenance cost overhaul and renew, forecasted the economic life of mining dump truck scientifically for 11 years, according to the economic principle of overhaul , judged whether need third overhaul and provided a basis for evaluating the economic life of domestic mine use electric wheel trucks.
Study on Signal Integrity Simulation for High Speed Serial Rapid IO
Authors: Jiang Hong Xu , Zhang Xiao Hong , Zhao Wei , Lu Jin Yuan
Published: July 2013

With the increases of signal transmission rate in digital systems, the signal integrity becomes increasingly important in high-speed circuit design. During the hardware design of high-speed serial Rapid IO, signal integrity simulation of 5Gbps high-speed serial bus had been carried out by using Channel Analysis tools. Reliable data was formed by effectively analysis and evaluation of pre-simulation, the signal quality of high-speed serial Rapid IO was verified by post-simulation. The non-ideal design parameters were optimized by referring to the effective data obtained in pre-simulation. Signal quality has been greatly improved by parameters optimization. Signal integrity simulation analysis and verification of serial Rapid IO provides strong support for the design and significantly improves the efficiency of hardware design.
Influence of Noise to Chaotic Time Series Prediction in Environment
Authors: Shi Qing Jun , Liu Yang , Li Jing , Ma Hui Bin , Liu De Sheng , Zhang Zhong Wu
Published: July 2013

When constructing chaotic time series prediction model involving noise, noise would influence the chaotic characteristics of the time series and lower the precision and generalization ability of the model. This paper applies wavelet transform to make de-noise on gas emission time series. It uses state space reconstruction theory to determine the embedding dimension and delay time. In the constructed phase space, build BP artificial neural network model to make prediction. Prediction model constructed after wavelet de-noises achieves good prediction performance.
Research on Sedimentary Facies of Formation of Neogene in Oilfield
Authors: Xing Xiang , Cai Feng , Hu Wang Shui
Published: July 2013

The paper studied the sedimentary system of No.1 and No.2 structure in Nanpu oil field with methods of geological, logging, seismic and chemical analysis, associated with core characteristics, sedimentary structure, profile structure and logging facies. The results demonstrate the following three points. First, Minghuazhen Formation in Nanpu field is meandering river sedimentary, and the channel subphase can be further divided into channel bottom lag deposits, beach, abandoned channel and natural levee. Second, the isopach and sedimentary face map of Minghuazhen Formation are generated based on each well's thickness of sand body and curve characteristics, and show the trend of North West and South West distribution. Third, sand body distribution can be predicted though spatial distribution of sedimentary face. And linear reservoir and Barrage-type reservoir are the two typical zones of Minghuazhen Formation.
Mining Exploration of Bauxite Based on High-Power Electrical Method
Authors: Fu Si Feng
Published: July 2013

This article gives the basic deposition of the western sedimentary bauxite strata in Henan Province. Bauxite deposition formation and its surrounding rock geophysical characteristics; the bauxite layer rock has a series of low resistivity low polarization characteristics. Ordovician limestone has obvious high impedance polarization characteristics, which makes the use of resistors Department of Law exploration become possible. It explores the use of high-power electrical method exploration bauxite technology, and describes how to use the results of investigation of high-power electrical method inferred bauxite body. And it takes the examples of high-power electrical method in looking for bauxite effective.
Research on Algal Bloom Control for Environment Engineering
Authors: Jiang Hao , Rui Jian Liang , Li Hai Lin , Zhao De Hua , Fu Jing Jing , An Shu Qing
Published: July 2013

Aquatic plants inhibit algae through nutrient competition, sludge sedimentation and the release of allelochemicals in three ways. Investigating Pistia stratiotes L in East Lake, Shao (2001) observed removal rate of the BOD5 achieved more than 70%; the total nitrogen removal efficiency was 60%, the total phosphorus removal efficiency was approximately 70% or more, and this biochemical inhibitory effect may promote algal settlement. Ho Pool (1999) found that the Rhizoma AcoriGraminei could cause a water total nitrogen (TN) removal rate of 87.4%, a total phosphorus (TP) removal rate of 43.9%, and a dissolved oxygen (DO) increase of 26.6%. These studies suggest that through the promotion of the lake TN and TP, aquatic plants influence bio-deposition into sediments, in addition to their role in the nutrient cycling of lakes. Furthermore, many studies have shown that aquatic macrophytes can produce allelochemicals that could inhibit the growth of algae (Donk & Bund, 2002; A. Gross & Boyd, 1998; Elisabeth M. Gross, 2003; E. M. Gross & Sütfeld, 1994; Mulderij, Smolders, & Van Donk, 2006; Mulderij, Van Nes, & Van Donk, 2007).
Design of Intelligent Power Management System Based on Internet of Things
Authors: Jian Yu Qing , Yu Zhang Hong , Chen Shuang
Published: July 2013

Intelligent power management system based on Internet of things is mainly used in electrical equipment focused occasions such as home or office, used for remote monitoring and managing the power of the electrical equipment, the system also has intelligent management functionality, it can control power supply based on current state of the power consumption of the electrical equipment, to achieve the purpose of saving energy consumption. The control center of the system used embedded hardware platform and Linux operating systems based on the ARM processor core, software development used C language.In this paper, the overall design of the system is described.
Analysis of Chinese Renewable Energy Engineering
Authors: Wu Yun Na , Xu Ru Hang
Published: July 2013

Chinese renewable energy power generation construction is undergoing a rapid flourish nowadays, so a large amount of projects need to be contracted to engineer procure construct enterprises, namely EPC enterprises. However, high-level EPC enterprises always outsource specific activities to various vendors simultaneously, thus resulting in many outsourcing risks. This paper aims to find reasonable strategy against these risks. According to first hand empirical study, this article denotes outsourcing contract risk as the major one that EPC enterprise would confront, and categories it into two detailed risks, namely adverse choice and moral risk. A game model between EPC enterprise and vendor is established to discuss bilateral behaviors after signing contract. Nash equilibrium under mixed strategy is found based on two basic hypotheses. At last a two-side strategy called Carrot and Stick is suggested to avoid vendors malversation based on the analysis results.
Study on Efficient Grid Dispatching Scheme in Green Power Engineering
Authors: Li Su Kang , Xu Yuan , Mei Jian Sheng , Zhang Jun
Published: July 2013

The purpose is to implement data sharing and exchange of each application system, establish integrated & technology-supported platform for regional grid dispatching, build data source based on EMS system and platform of visual panoramic model and interoperation centered on CIM, realize visual and unified management of regional grid data and basic resource sharing and exchange, promote construction and development of application integration system and intelligent grid management in Nanchang area.
Numerical Model for Interfacial Reaction between Titanium and Zirconia in Electromagnetic Field
Authors: Liu Ai Hui , Sui Yan Wei
Published: July 2013

Based on the interfacial reaction model between Ti and ZrO2 in gravity field, taking account of the effect of electromagnetic field, a comprehensive numerical model for simulation of heat and mass transfer is established to study the interfacial reaction between liquid Ti and ZrO2 in electromagnetic field. With the proposed model, numerical simulations are preformed to investigate the influences of pouring temperature, holding time on the oxygen concentration and reactive layer thickness in metal. The results show that both the oxygen concentration and the thickness of reactive layer in metal increase with increasing the holding time and the pouring temperature. The thickness of reactive layer in electromagnetic field is greater than that in gravity field.
Study on Preparation and Properties of Hyperbranched Polyurethane/Multi-Walled Carbon Nanotubes Composites
Authors: Sun Ning , Wang Jun Chao , Feng Chun Yun , Li Yi Biao , Jiang Shao Hua , Wu Zhi Mou
Published: July 2013

With the Grafting to method, the hyperbranched polyurethane/multi-walled carbon nanotubes composites (MWNT-HBPU) was prepared. The reaction mechanism was covalently grafting hyperbranched polyurethane to multi-walled carbon nanotubes,through the reaction of the isocyanate groups of multi-walled carbon nanotubes (MWNT-NCO) and the hydroxyl groups of homemade hyperbranched polyurethane (HBPU). The structure and properties of the composites was studied by Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy (Raman), Thermal gravimetric analysis (TG) and Differential scanning calorimetry (DSC). The test results of FT-IR and TG showed that the prepared product was MWNT-HBPU; the DSC results demonstrated that the glass transition temperature of HBPU was significantly increased from 91.9°C to more than 99.7°C by the addition of MWNT-HBPU; the dispersion of the MWNT-HBPU was much better than the pure MWNT in solvents, such as N, N-dimethylformamide , Dimethyl sulfoxide etc.
Preparation of Nanosized Spinel Lithium Manganate by an Integrated Technique of High-Gravity Technology and Microwave Technology
Authors: Huang Xin Wu , Zhou Ji Cheng , Xie Zhi Bai , Liao Jing Jing , Liu Si Wei
Published: July 2013

A novel synthesis of nanosized spinel LiMn2O4cathode has been developed by a combination of high-gravity technology and microwave technology. Spinel lithium manganate precursor were prepared by co-precipitation method in a rotating bed with helix channels (RBHC). Calcination of the precursor in the microwave field produces uniformly sized, nanoparticles of spinel LiMn2O4as the final product. The phase structures and morphologies were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM), transform electron microscopy (TEM). The results show that nanosized spinel LiMn2O4powders with high crystallinity, uniform particle size, and the average size of about 60 nm can be synthesized by the integration of high-gravity technology and microwave technology.
Surface Charge Research of Graphene Oxide, Chemically Reduced Graphene Oxide and Thermally Exfoliated Graphene Oxide
Authors: Li Ming Jie , Liu Chen Ming , Cao Hong Bin , Zhang Yi
Published: July 2013

In this contribution, the surface electrical properties of graphene oxide (GO), chemically reduced graphene oxide (RGO) and thermally exfoliated graphene oxide (EGO) were characterized by zeta potential. Their surface morphologies were observed by scanning electron microscope. Then they were immobilized on glass carbon electrodes and their electrochemical behaviors for different charged redox systems were also investigated by using the cyclic voltammetry (CV) method. Results indicated that the density of surface negative charge on GO is much more than those on RGO and EGO. Furthermore, the electrochemical performances of electrodes modified with GO, RGO and EGO for detecting the model analyte Cu2+ by CV were compared. The results demonstrate that negative charge on the surface of graphene materials affects their performances as electrochemical sensors significantly.
Microstructure and Growth Mechanism of Glucose-Carburized Nickel Substrates
Authors: Pechlivani E.M. , Stergioudis G. , Pavlidou E. , Skolianos S. , Tsipas D.
Published: July 2013

In this research, efforts were made to study the modification of microstructure of pure Ni matrices. Modification was attempted using glucose as carburizing medium under a control of heat treatment conditions. Nickel plates were carburized under vacuum conditions at 380°C and 650°C for 3 hours. In order to determine the parameters of the carburizing, thermal properties of glucose along with the thermochemical behavior were examined by Thermogravimetric Analysis (TGA) and Differential Thermal Analysis (DTA). The characterization of the microstructure of the carburized specimens was investigated by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy-Dispersive X-ray Spectroscopy (EDS). For analyzing the effect of temperature treatment on corrosion resistance, electrochemical corrosion tests were conducted. It was observed that the polarization curves for carburized samples at 380°C were shifted to lower corrosion current densities. Consequently, lower corrosion rates were achieved for these samples preventing the formation of extensive corrosion over their surfaces comparing with carburized Nickel substrates at 650°C.
Preparation of Novel Corona-Resistance Polyimide/Spherical SiO2 Hybrid Films
Authors: Rui Jia Ming
Published: July 2013

In this study, a novel type of corona-resistance polyimide/spherical SiO2 hybrid films based on 3,3,4,4-biphenyltetracarboxylic dianhydride (s-BPDA) and 1,3-bis (4-aminophenoxy) benzene (1,3,4-APB) was synthesized by incorporation with different loadings of spherical SiO2 particles via in-situ polymerization. All the films were prepared by a so called two-step procedure and finally cured at 300°C. TEM images showed the SiO2 particles were homogeneously dispersed in the polyimide matrix by means of ultrasonic method and the addition of coupling agent. Experimental results indicated that the hybrid films with much higher inorganic content exhibited good thermal and mechanical properties as well as low water absorption. Especially, the dielectric strength and electric aging time of the hybrid films were obviously enhanced, which was attributed to the highly dispersed spherical SiO2. The morphology changes of the film surface caused by the electric field were also studied by scanning electron microscope (SEM).
Effect of TiN/Electroless Ni Duplex Coatings on Surface Hardness and Erosion Behavior of ADI
Authors: Hsu Cheng Hsun , Huang Kuan Hao , Chen Yi Tsung
Published: July 2013

This study utilized electroless nickel (EN) and cathodic arc evaporation (CAE) technologies, with the known advantage of low processing temperature, to treat the austempered ductile iron (ADI) substrates. The eligibility of applying the EN and CAE-TiN duplex coatings on ADI, along with the coating properties, such as structure, roughness, adhesion, and surface hardness were evaluated and analyzed. Moreover, erosion tests were performed to further understand the effect of both the coatings on the erosive behavior of ADI. The results showed that the unique microstructure of ADI did not deteriorate after EN and CAE treatments. By the way of TiN/EN duplex coatings, surface hardness of ADI largely increased from 398 to 2243 HV5g. Moreover, the duplex coated ADI had a noticeable performance on erosion protection under a specific erosive environment with Al2O3 particles.
Effect of Dynamic Strain Aging on the Creep Behavior of Zr-1Nb-1Sn-0.1Fe Alloy Tubes at Intermediate Temperatures
Authors: Lee Jong Min , Jeong Koo Bum , Hong Sun Ig
Published: July 2013

Zr1 Nb1 Sn0.2 Fe alloy exhibited the transition of the stress exponent from 6.5 to 7.5 in the lower stress region to 4.2 in the higher stress region. The reduction of stress exponent at high stresses in Zr1 Nb1 Sn0.2 Fe can be explained in terms of the dynamic solutedislocation effect. The temperature range of dynamic strain aging generally increases with increase of strain rate. The dynamic strain aging due to oxygen atoms observed in Zr alloys at temperatures between 300°C and 400°C during tensile test at the strain rate of 1 x10-3/sec should occur below 300°C in creep because the creep rates (1 x 10-6 and 1 x10-8) are much lower. Since solute atoms which can act as mobile obstacles are Sn and oxygen, the solute-dislocation interaction for the strengthening of creep resistance at intermediate temperatures is likely caused by Sn atoms. Dislocation networks and pile-ups around the precipitates were observed at the applied stress of 80MPa. And dislocations were observed to be distributed more or less randomly at the applied stress of 120 MPa. The more homogeneous distribution of dislocation in the region of low stress exponent at 120 MPa is thought to be caused by the dynamic strain aging effect of Sn atoms.
Effects of ZrO2 on Zinc Crystalline Glaze
Authors: Lee Chi Youn , Lee Hyun Soo , Shin Kyung Hyun
Published: July 2013

Zinc Crystal Glaze has its limits in practical use of commercial glaze due to the sensitive firing schedule. In order to overcome these limits, and to improve the practical usage, this study is aimed to develop a stable zinc crystalline glaze. This study altered the quantity of nuclear formation of zinc crystal glaze in order to control the willemite (Zn2SiO4) formation in the glaze. The addition of ZrO2 to zinc crystal glaze influences the quantity of nuclear formation and its preservation; thus ZrO2 was used to control the optimal firing temperature and the size of the crystal formation in the glaze to find a zinc crystal glaze capable of withstanding various ranges of temperatures.
Processing Map for Hot Deformation of Homogenized AZ61 Mg Alloy
Authors: Liao Ching Hao , Wu Horng Yu , Lee Shyong , Wu Cheng Tao , Chiu Chui Hung
Published: July 2013

Based on the experimental results from the hot compression tests of homogenized cast AZ61 Mg alloy, processing maps were constructed by superimposition of the instability maps over the power dissipation maps. The domain with the efficiency of power dissipation reaching a local maximum and flow instability region were identified in the processing maps. The processing map obtained at a strain of 0.6 exhibited only one domain with local maximum efficiency of power dissipation. The microstructure observations showed that variation in microstructure was related to the deformation condition, which was associated with the variation in efficiency of power dissipation.
NMOS Performance of Low Boron Activation on Group V for Ultra-Shallow Junction Formation
Authors: Said Muzalifah Mohd , Napiah Zul Atfyi Fauzan Mohammed , Arith Faiz , Noh Zarina Mohd
Published: July 2013

Fabrication of ultra shallow junctions with low contact resistances is desired to advance current CMOS technology. The low Boron activation on Group V for ultra shallow junction formation will makes the chip fabrication works effectively. SilvacoTCAD (Technology Computer Aided Design) manages simulation tasks and analyzing simulation results when ultra-shallow junction formation is using low-boron activation on Phosphorus, Antimony and Arsenic.A stimulate process like implantation, diffusion and dopant activation and epitaxial growth in different semiconductor materials has been analyzed as well as investigate the effects of energy of boron ion beams on ultra shallow junction formation.As a result, the electrical characteristics of NMOS structure by obtaining graph of IDVGSand IDVDShas been studied when there are variations in junction length (Xj), and gatelength (Lg).
Theory and Practice in the Process of T-vc Dependence Creation for Selected Cutting Material
Authors: Panda Anton , Duplák Ján , Jurko Jozef
Published: July 2013

The theory and practice in engineering industry is not the same. Wise people say that practice is the only well-mastered theory. The most important part of new discovery is successfully realized experiment. Every experiment has inputs and outputs. Inputs are defined before experiment and they are accurately determined and described. Outputs have to be measured and described after experiment. It is very difficult to describe and express parameters that are base of experiments. Tested parameters and theirs dependencies are very often described by means of graphs, tables or definitions. Lot of parameters and their dependencies in engineering practice are not described by means of formula. Very important and often used standard ISO in engineering practice is standard ISO 3685. This standard includes characteristics for various cutting materials. The main part of this standard is T-vc dependence for cutting materials. One of the cutting materials contained in standard ISO 3685 is sintered carbide. There are instructions obtained in standard ISO 3685 for creation of T-vc dependence. The article describes differences between T-vc dependence for sintered carbide and standard ISO 3685.
Experiment Research on Tensile-Shear Behavior of Spot-Welded Lap Joints of Ultra-High Strength Steel with Common Steel
Authors: Li Xiang , Li Xiao Yang , Yu Hui Ping , Li Ya
Published: July 2013

The welding spot of Ultra-high strength steel of 22MnB5 and common steel of St16 were the investigative objects, the intermediate frequency inverter & electric servo welding system was used to weld the sheets. Electrical measuring test method was used on spot-welded joint under tensile-shear load to determinate the strain of different positions, including the strain of weld nugget, the stain around the nugget and the base metals strain near the weld nugget. The deformation regularity of spot welding joints surrounding and base metal were analysed according to the data. The test provided a reference for the numerical simulation of spot welding model. Test results show that the strain distribution on spot welding joint is not uniform, the strain of the weld nugget center is relatively small, large deformation exists mainly in the heat affected zone. That is to say, the area near the spot-welding joint heat affected zone is prone to yield. The base metal area near the weld nugget is mainly affected by tensile strain, and the strain increases with the increasing of the load. The force condition of the specimen is complicated around the nugget, the relationship between the load and the strain is erratic. The strain of the weld nugget will gradually change from axial compressive strain to axial tensile strain. The strain of spot welding specimen made of dissimilar materials (22MnB5& ST16) is negative, and almost linearly.
Growth and Characterization of MOCVD Grown Gallium Phosphide Nanostructures on Silicon Substrates
Authors: Chowdhury Sisir , Halder Nripendra N. , Banerji P.
Published: July 2013

Gallium Phosphide (GaP) nanostructures were grown on p-Si substrates by Metal Organic Chemical Vapor Deposition (MOCVD) to study the structure of low dimensional IIIV semiconductor on Si substrates. It is found that at a temperature of 540 °C, nanostructures with diameter 4080 nm and height 515 nm were obtained. The density of the nanostructures was found to be 1014 m-2. The UV-Vis-NIR spectra showed a blue shift of band gap. Photoluminescence measurements also confirmed the band gap enhancement.
Deposition of Cu2ZnSnS4 Thin Film by Pulsed Laser Deposition and Assembly of Thin Film Solar Cell with the Novel Structure of FTO/CdS/Cu2ZnSnS4/Mo
Authors: Yao Min , Shi Cheng Wu , Zhang Yan Ru , Dai Xiao Yan
Published: July 2013

Cu2ZnSnS4(CZTS) thin film was successfully prepared by pulsed laser deposition using CZTS nanocrystal as a source and the thin film solar cell with the novel structure of FTO/CdS/CZTS/Mo was assembled. At the laser incident energy of 6 J·cm-2, the chemical composition of the CZTS thin film was Cu1.74Zn0.80Sn1.00S4.04,near to stoichiometric ratio. The thin film solar cell with the novel structure of FTO/CdS/CZTS/Mo gave short circuit photocurrent density of 1.01 mA·cm-2, open circuit voltage of 0.39 V, and fill factor of 0.485, corresponding to the photoelectric conversion efficiency of 0.19% at the illumination (Air Mass 1.5, 100 mW·cm-2).
On the Mechanism of Enhanced Photoluminescence of SiNx:Tb3+ Compared with SiOx:Tb3+
Authors: Gong Dao Ren , Yuan Zhi Zhong
Published: July 2013

Room-temperature photoluminescence (PL) properties of the Tb3+ion implanted non-stoichiometric silicon nitride (SiNx:Tb3+) and silicon dioxide (SiOx:Tb3+) were studied. The films were deposited by plasma-enhanced chemical vapor deposition (PECVD) and then annealed at different temperatures for 1 hour in flowing N2after the Tb ion-implantation. Results show that there are four intense PL peaks due to the intra-4ftransitions of Tb3+in the wavelength from 470 nm to 625 nm for both kinds of films. Moreover, the PL intensity of Tb3+:SiNxis much higher than that of Tb3+:SiOx. The less oxygen content of the SiNxfilm and, more importantly, the faster recombination lifetime of Tb3+ion in SiNxfilm are the main reasons. This result shows that SiNx:Tb3+can be used for silicon-based light emission materials.
The Study on the Preparation and Characterization of Crosslinked Polyvinyl Alcohol Microspheres
Authors: Yang Yun Feng , Gao Bao Jiao , Liu Su Yu
Published: July 2013

Linear polyvinyl alcohol ( PVA ) as the matrix, Glutaraldehyde as crosslinking agent, the crosslinked polyvinyl alcohol microspheres ( CPVA ) was prepared by inverse microemulsion polymerization. Influence factors for forms and particle size of crosslinking spheres such as the ratio of oil and water, reaction temperature and time, crosslinking agent and catalyst use level, stirring speed. When reaction conditions changed, the particle size would change accordingly.
Stress Corrosion Cracking Behavior of an Alloy 182-A533B Weld Joint with Continuous Material Properties
Authors: Zhao Ling Yan , Xue He , Jiao Kang , Tang Wei
Published: July 2013

Primary loop recirculation (PLR) piping weld joints in light water reactor (LWR) environments are more susceptible to stress corrosion cracking (SCC). Limited experimental work also suggested the complicated material and mechanical property of the fusion zone and the heat affected zone (HAZ) especially in dissimilar weld joints might play an important role in promoting SCC growth. In our study, different from the former sandwich like weld joint, a model of continuous heterogeneity mechanical property was established, the effect of welded mechanical heterogeneity on the stress-strain field and J-integral along the crack fronts at different locations were simulated in an Alloy 182-A533B dissimilar weld joint by the elastic-plastic finite element method (EPFEM). The results indicate that the crack near the dividing line of base metal (BM) and HAZ has higher resistance to SCC. At the dividing line of HAZ and weld metal (WM), the crack is prone to propagate into the WM, and will present more complex crack morphology and behaviors.
Hollow Glass Microspheres Coated with La0.6Sr0.4MnO3 and its Microwave Absorption Property
Authors: Cheng Yu Lan , Wei Ke Xiang , Xia Ping , Bai Quan
Published: July 2013

La0.6Sr0.4MnO3 and hollow glass microspheres with different weight ratio have been prepared by sol-gel method. The structure, morphology and microwave absorption properties have been investigated. The results shown that the ratio of La0.6Sr0.4MnO3 to hollow glass microspheres has great influence on reflection loss. The optimal absorption property can be obtained when the ratio is 6:1, which is attributed to the proper magnetic loss of La0.6Sr0.4MnO3 coating layers.
Preparation of ZnO/PANI Nanocomposite and Study on its Photocatalytic Properties
Authors: Xu Hui , Xing Jian Wei
Published: July 2013

Polyaniline (PANI)/zinc oxide (ZnO) nanocomposites have been synthesized by in-situ polymerization of aniline monomer with ZnO nanomaterials. The PANI/ZnO nanocomposites were used as photocatalyst in the photodegradation of methylene blue dye (MB) molecules in aqueous solution. The results showed that PANI/ZnO nanocomposite greatly enhanced photocatalytic activities compared with pristine polyaniline might due to high photoexcited electronhole pairs charge separation. The photocatalytic activities of PANI/ZnO nanocomposites increased with increasing ZnO content, however, further increasing ZnO content over 50% induced the formation of more agglomerates, which could act as recombination centers of photoexcited electronhole pairs, leading to decreased photocatalytic activity. The kinetics of photodegradation of MB dye using PANI/ZnO(ZnO content 50 % ) nanocomposites photocatalyst was found to be of the first order.
Electrochromicproperties of Vanadium Oxide Thin Film Deposited by Magnetron Sputtering
Authors: Liu Chien Cheng , Liu Kuang I , Chang Chiung Wen , Cheng Yung Mao , Lin Chih Lung
Published: July 2013

Vanadium oxide films were deposited on ITO (Indium Tin oxide) glass substrates at room temperature byreactive DC magnetron sputtering.The Vanadium oxide films were varied the nitrogen flow rateto investigate composition, microstructure, optical properties, and electrochromic properties determined by X-ray diffraction, field-emission scanning electron microscope (FE-SEM), UV-visible spectrometer, andcyclic voltammetry. Experimental results indicatedthat V2O5filmsreactively sputtered at oxygen flow rates of 15 sccm had better electrochromic property and optimalperformance.
Fracture of a Finite Medium with a Circular Internal Crack under Hyperbolic Heat Conduction-Prescribed Crack Face Temperature
Authors: Wang B.
Published: July 2013

This paper studies the fracture mechanics of a thermoelastic material layer with an internal crack subjecting to a prescribed temperature. The hyperbolic heat conduction theory is used and the transient thermal stress intensity factor is obtained. Comparisons of the results from the non-Fourier model and the Fourier model are made. The results demonstrate that the non-Fourier effect has a strong effect on the transient thermal stress around the crack tip. Thermal stress intensity factor predicted by the hyperbolic heat conduction model is considerably high then that predicted by the classical Fourier.
Investigations of Fatigue Performance of S135 Drill Pipe Steel under Uniaxial Loading
Authors: Luo She Ji , Wang Rong , Zhao Kang
Published: July 2013

The fatigue life of S135 drill pipe steel was investigated by means of tension-compression loading and torsion loading under uniaxial loading during the fatigue test. The quantitative formulas of fatigue life were obtained by regression analysis method, and the fatigue fracture mechanism was analyzed. The results show that a linear correlation was found between fatigue life and effective stress in the double logarithmic plots. Cracks initiated from the specimens surfaces under tension-compression loading as well as torsion loading. For the tension-compression fatigue and the torsion fatigue specimens, the main characteristics for cracks propagation were striations and sheares ripple marks, respectively.
Photocatalytic Decomposition of Gaseous HCHO by N-Zr-TiO2 Catalysts
Authors: Huang Qiong , Yan Xiao Kang , Li Bing , Chen Ying Wen , Zhu She Min , Shen Shu Bao
Published: July 2013

TiO2 has been considered the most promising photocatalyst for the degradation of volatile organic compounds (VOCs). However, the application of pure TiO2 is limited because it requires UV activation with a high-energy band gap, and < 5% of the solar radiation can be used. In order to improve the photocatalytic performance, TiO2 with Zr and N doping can be activated by the UV-vis radiation available in sunlight to perform solar photocatalysis. The properties of the N-Zr-TiO2 catalysts are characterised by SEM and DRS. The results exhibit that the optical response of TiO2 is shifted from UV to the visible light region with the introduction of Zr and N. The photocatalytic tests indicate that the N-Zr-TiO2 demonstrate a high activity for the degradation of formaldehyde.
Microencapsulation of Rutin in Chitosan-Coated Alginate Microspheres through Internal Gelation Technique
Authors: Jiang Heng Li , Cui Yuan Lu , Qi Yun
Published: July 2013

The present study is aimed to prepare the chitosan-coated alginate microspheres by an internal gelation technique with rutin as model drug. Recovery of microspheres and microspheres morphology were evaluated by determination of rutin encapsulation efficiency and microscope observation, respectively. The interaction between chitosan and alginate was assessed by differential scanning calorimetry (DSC). The microscope observation showed that the microspheres were homogeneous and the surface was spherical and smooth. The result of DSC indicated that the main force of complex formation was electrostatic interactions between ammonium of chitosan and carboxylate groups of alginate. In vitro release of the chitosan-coated alginate gel beads indicated that it had a satisfactory sustained releasing behavior for the drug within 20 h, and still maintain existed within 180 h. The microspheres which were biodegradable, biocompatible, metal ion adsorbable and persistable in environment may be applied to wastewater treatment.
Accelerating Color Space Conversion Using CUDA-Enabled Graphic Processing Units
Authors: Yang Hang Jun , Wang Jian , Ji Xiao Yong
Published: July 2013

Color space conversion (CSC) is an important kernel in the area of image and video processing applications including video compression. CSC is a compute-intensive time-consuming operation that consumes up to 40% of processing time of a highly optimised decoder. Several hardware and software implementations for CSC have been found. Hardware implementations can achieve a higher performance compared with software-only solutions. However, the flexibility of software solutions is desirable for various functional requirements and faster time to market. Multicore processors, especially programmable GPUs, provide an opportunity to increase the performance of CSC by exploiting data parallelism. In this paper, we present a novel approach for efficient implementation of color space conversion. The proposed approach has been implemented and verified using computed unified device architecture (CUDA) on graphics hardware. Our experiments results show that the speedup of up to17×can been obtained.