bluuebunny/crossref_metadata_2025 huggingface dataset:
Health-Based Risk Assessment on Air Pollutants in Beijing
Authors: Yang Li Yun , Wu Song Tao
Published: June 2012

This paper studied the health risk of air pollutants SO2, NO2 and PM10 in all the districts and counties of Beijing with exposure-response analysis. Different ecological risk areas based on health risk of air pollutants are recommended in Beijing. The result shows that SO2 and NO2 brought a relatively low health risk, while PM10 brought a relatively high health risk. Air pollutants health risk exists in all the districts and counties of Beijing, and most ecological conservation development zones are low risk areas, while urban functional center zones, urban functional development zones and new urban development zones are mainly in medium risk level.
The Study of Environment Levels of Dioxins and Furans in a Typical Regional
Authors: Su Shan Shan , Hui Yang
Published: June 2012

Ambient air, tree bark, soil and river sediments were sampled by the investigation of the background levels from a typical regional without industrial pollution in southern China. The WHO-TEQ of PCDD/F (WHO-2005) were 0.0366±0.0126 pg/Nm3 in ambient air, 0.8863±0.6088 pg/g in tree bark, 3.2435±0.0651 pg/g in soil and 1.4795±0.1917 pg/g in river sediments, respectively. The levels of PCDF in ambient air and tree bark were generally a little lower than the PCDD levels, but the values of PCDD were tens, even thousands times high than the PCDF in the soil and river sediments. The scope plot of PCA indicated that the congener profiles of PCDD/Fs in the tree barks, soil and river sediments of Hezhou were similar, but different from the samples of ambient air.
Integrating Environment into Development Strategy of Tianjin Binhai New Area through Strategic Environmental Assessment
Authors: Tian Li Li , Zhao Ya Fei
Published: June 2012

Some strategic environmental assessment (SEA) pilot cases in China strive to integrate environmental issues into the planning from the beginning. One of them is the SEA for development strategy of Tianjin Binhai New Area. The SEA adopted an interactive assessment mode with the decision-making process and predicted the environmental impacts of the development strategy on land resource, water resource, energy, surface water, atmospheric environment, and ecosystem of land area and offshore area. The future development strategy of circular economy and low-carbon economy in Tianjin Binhai New Area was also analyzed. Finally, experience from the SEA case was discussed. The case study shows that support from non-environmental agencies, early integration of SEA process and planning process, interactive assessment mode, and sensible environmental protection strategy facilitate the integration of environment into decision-making.
Research on Construction of National Eco-Industrial Demonstration Park of China
Authors: Bai Xue , Chu Chun Li , Ju Mei Ting
Published: June 2012

Eco-industrial Park has become an important form to carry out the concept of circular economy and to establish ecological civilization. Summarizing the experiences and lessons in the process of National Eco-industrial Demonstration Parks' construction has an important practical significance for guiding the construction and healthy development of eco-industrial parks in China. After collecting and studying the cases of National Eco-Industrial Demonstration Park, we summarized the successful experiences and explore the problems in the process of construction. Some advice has been given to perfect the industrial chain, to establish a system of information management and to enhance technological innovation of companies, which would be useful in promoting the healthy development of eco-industrial parks in China.
The Study of Suction Test and Engineering Parameters of Yantai Domestic Garbage Municipal Treatment Plant
Authors: Wang Zhen Hua , Yin Yu Min , Yan Shi Quan , Li De Kun , Song Jian Guo
Published: June 2012

This paper gives an analysis of CH4 output of Yantai domestic garbage municipal treatment plant through field static test and dynamic suction test. The former test measures the methane density of the domestic garbage in the landfill area which shows that the area is in the prime time of gas production, while the dynamic test results provide technical parameters for the engineering of the collection and usage of CH4 gas.
On the Application of BOT Mode in Environmental Protection and Pollution Abatement in Industrial Parks
Authors: Liu Ding Hao
Published: June 2012

It’s necessary and feasible to adopt BOT mode of environmental protection and pollution abatement in industrial park. The BOT mode not only helps to make up for the gap of construction fund of environmental protection, but also help to improve the effectiveness of environmental protection and pollution abatement in industrial park with through market mechanism. The article first analyzes the significance of introducing BOT mode into the environmental protection and pollution abatement in industrial park. Second, the article analyzes the prerequisites for implementing BOT mode of environmental protection and pollution abatement in industrial park. In the end the article bring forward countermeasures for implementing BOT mode of environmental protection and pollution abatement in industrial park
Improved Passive Solar Hot-Air Heating of Residential Design and Research
Authors: Yang Bin , Jiang Shu Guang
Published: June 2012

Climate characteristics of Shihezi area, present passive solar building planning and design of residential and architectural design requirements; Through the improvement of traditional passive solar heating system, and adopt collection hot wall completely cover housing south wall and other measures to improve thermal efficiency sets. To pilot project as an example, the use of SLR method calculated, the system, in Shihezi the coldest month is January, solar fraction can reach 31%.
Effects of Recycled Melamine-Formaldehyde Plastic on Properties of High-Density Polyethylene
Authors: Yang Ming Shan , Li Lin Kai
Published: June 2012

The modification process of recycled melamine-formaldehyde(MF) plastic on high-density polyethylene(HDPE) has been studied, and the optimal compounding parameters were obtained by twin extruding system in this paper. The results showed that with increasing of recycled MF plastic in PE, the tensile strength, elongation at break, molding shrinkage and impact strength decreased, the modulus, heat distortion temperature(HDT) and melt flow rate(MFR) increased, which indicates that the addition of recycled MF plastic can improve rigidity, heat resistance, size stability and flowability of HDPE. More importantly, the oxygen index(OI) of HDPE was increased with the addition of recycled MF plastic, which indicates that recycled MF plastic can improve the flame-retardant property of HDPE.
The Effect of Transpiration for Heavy Metal Uptake of Hyperaccumulators
Authors: Hao Han Zhou , Zhong Ru Gang , Xiao Rong , Liu Cheng Wu , Zhong Xue Bin
Published: June 2012

Transpiration of plants has an important role in heavy metal absorption. When the transpiration is flourishing, plants accumulate more heavy metals, and its enrichment capability is also stronger.This article reviews the effect of the plant transpiration on hyperaccumulators of heavy metal uptake to lay a solid foundation for further research.
BMP Research on ANPSP Control in Middle Region of Zhejiang Province
Authors: Yang Qing , Jiang Zheng Hai , Hou Wen Yue , Liu Zhe Jun , Qiu Xin
Published: June 2012

Agricultural nonpoint source pollution (ANPSP) is an important source for water environment, with its contribution ratio increases year by year. ANPSP becomes the environmental bottleneck factor in restricting agriculture sustainable development and rural modernization. The study was focused on the causes and occurrence of ANPSP in the middle region of Zhejiang province, and introduced some successful governance effect of best management practices (BMP) in developed region. The application of control technologies under BMP guidance were compared and analyzed, among artificial wetland, front library, buffer zone and land-water interlace belt, water and soil conservation, agriculture ecological engineering management and so on. According to the characteristics of different BMP technologies and ANPSP in the middle region of Zhejiang, the regional BMP should be designed for solutions. This research made good sense to promote effective control of ANPSP in middle region of Zhejiang in engineering application.
Environmental Safety Evaluation of High-Rise Buildings in Baotou
Authors: Ding Yu Xian , Ma Ning Bo , Ding Lei
Published: June 2012

The rapid development of high-rise buildings has brought difficulties to urban environmental safety. Fuzzy evaluation method is adopted to conduct qualitative and quantitative analysis of Baotou's high-rise architectural environment through a close combination of the course and the cutting-edge technology of the scientific development of architectural environment. The analysis is implemented in three aspects including body safety, resource safety and social ecology safety. It also analyses the practical situation of Baotou's high-rise architectural environment through real cases, hoping to provide theoretical direction for the improvement of Baotou's urban environmental safety.
Distribution and Contamination Evaluation of Lead in the Sediments of Northern Kaohsiung Harbor, Taiwan
Authors: Chen Chiu Wen , Chen Chih Feng , Dong Cheng Di
Published: June 2012

The distribution, enrichment, accumulation, and potential ecological risk of lead (Pb) in the surface sediments of northern Kaohsiung Harbor, Taiwan were investigated. Results showed that the Pb concentrations varied from 10.9–73.2 mg/kg with an average of 42.1±19.1 mg/kg. The spatial distribution of Pb reveals that the Pb concentration is relatively high in the river mouth region, and gradually diminishes toward the harbor entrance region. This indicates that upstream industrial and municipal wastewater discharges along the river bank are major sources of Pb pollution. Results from the enrichment factor and geo-accumulation index analyses imply that the sediments collected from the river mouth can be characterized between severe and very severe degree enrichment and between moderately strong and strong to very strong accumulation of Pb, respectively.
Study of RFID Anti-Collision Based on Token Ring Network Model
Authors: Sun Yu Qiang , Wang Xiao Kang , Gu Yu Wan , Zhu Qiang
Published: June 2012

Models of Computer Network Anti-collision can’t be used in the area of RFID Anti-collision Algorithm, because the limit of tag’s structure. The paper discusses the anti-collision model of computer network----Token Ring Network Model, which lets the orthogonal codes act as token, proposed a strategy for RFID Anti-collision. Currently, the popular RFID Anti-collision Algorithms are based on the idea of random access, when collision happens, the reader tells the collision tags to send ID, waiting for any time. When the number of tag is large, two or more tags will be waiting for the same random time, then collision will be happen again, the contents of this paper can effectively solve these problems.
A Remote Monitoring and Control System for Injection Molding Machines Based on Optical Fiber Communications
Authors: Lin Hai Jie , Zhong Lei , Xu Hai Hang
Published: June 2012

According to the work flow of injection molding machines and the actual needs of remote monitoring, a remote monitoring and control solution for injection molding machine based on optical fiber communication is proposed in this paper. A kind of data acquisition hardware and software is designed and a remote monitoring and control system for injection molding machines based on optical fiber communications is built on this basis. This system can effectively improve the production efficiency of production enterprises.
Facial Expression Recognition Based on Gabor Features and Fuzzy Classifier
Authors: Jia Xi Bin , Wen Chun Cheng
Published: June 2012

A novel facial expression recognition method based on Gabor features and fuzzy classifier is proposed. Gabor wavelet is employed for feature extraction because it has good characteristics, which make it very suitable for the area of facial expression recognition. Because high-dimensional Gabor features are quite redundant, DCT and 2DPCA are respectively used to reduce dimensions and select valid features. Finally, expressions are recognized with fuzzy k-nearest neighbor classifier, which is demonstrated to be a more effective classifier. The experimental results show that the proposed method has high computational speed and good recognition rate.
Design and Application of Online Testing System Based on Fuzzy Mathematics
Authors: Min Li
Published: June 2012

Nowadays, all kinds of technology advance swiftly and vigorously, especially computer technology. In such cases, the computerized test system emerges as the times demand. It will take the place of the traditional test by making use of the computer to manage and possess the item bank, organize the contents and evaluate the test paper. It is characterized in its convenience and fastness in setting a test paper, its speed and accuracy in evaluating the paper and its scientific analysis of the test paper. It is easier for teachers to set a test paper by the item bank system, and it will save a lot of labors in evaluating the test paper. It will greatly improve the accuracy in evaluation. The statistical analysis will be performed automatically by the computer, which will be convenient for students to inquiry about, print, count and analyze their marks. Then in analogy to manual assessment of the exam scripts, an algorithm, by using fuzzy theory to assess the subjective questions, is proposed and analyzed in detail. It is a useful attempt to try to solve the automatic subjective question assessment which would have to be done traditionally by manual effort.
The Research on the Simulation of Warship Magnetic Localization Based on Genetic Algorithm
Authors: Li Hua , Li Qing Min , Liu Jun
Published: June 2012

Along with the thorough study on magnetic localization of warship, the research on the accuracy judgment method of the magnetic localization solution is more and more important. Previously there has been big limitation of the statistical magnetic localization judgment method based on the statistical phenomenon in the online magnetic localization, so it is difficult to achieve. For solving the above problem, by the aid of the entire search ability of the genetic algorithm, when the movement parameter of the target warship is unknown and the magnetic probe has the attitude angles, adopted the mentality of “Position calculation will be the captain as unknown variables, positioning to determine the amount of time is known to act as a criterion” , complete the magnetic localization arithmetic method based on the single rotation elliptic sphere magnetic model, it can complete the localization arithmetic and location solution identify efficiently. The computed result indicated the effect is good. The Magnetic location of warship can be divided into two sub-problems: positioning solution and the correctness determine of the positioning solution. There has been many research results of the magnetic location solution in comparison, the research on the accuracy judgment method of the magnetic location solution is not sufficient. In real time, with the online request, there isn’t many algorithms can achieve magnetic calculation and the correctness determine of the positioning solution.
H∞ Variable Universe Fuzzy Control for Power System
Authors: Wei Xi Le , Lu Mei Li , Wang Jiang , Deng Bin , Che Yan Qiu
Published: June 2012

The paper proposes a new power system stabilizer based on adaptive variable universe fuzzy systems. The algorithm creates the bridge to supply H∞ control design with more intelligence and fuzzy control design with better robust performance. By Lyapunov method, the overall closed-loop system is shown to be stable. In this study, the effect of both fuzzy logic approximate error and external disturbance on the tracking error is attenuated to a prescribed lever ρ by adequately selecting the weight factor γ. The statement is confirmed by simulation results of a single-machine infinite-bus system and a multi-machine system.
Automatic Contour Mapping System in Sensor Network
Authors: Chen Qiu Wen
Published: June 2012

Contour map has been known as one of the best methods to depict 3-dimensional terrains on 2-dimensional plots. With the emergence and rapid development of wireless sensor network, new approaches for contour mapping can be adopted to take the advantage of distributed nodes. In this paper, an integral contour mapping system with mobile data collection nodes is devised. Basically, the design allows each sensor node moves around a target area and extracts elevation samples in the aid of an upper reference plane. The network organization and data synthesizing algorithm are also studied. Furthermore, a low cost demonstrative platform based on 8051 microcontroller and ultrasonic transducers is implemented to prove the feasibility of the system.
Design of Computer Control System of Mobile Asphalt Concrete Mixer
Authors: Gong Xian Wu , Wang Gui Ping
Published: June 2012

In order to achieve the application requirements of a mobile asphalt concrete mixer, a distributed computer control system of the mixer is developed with an industrial control computer and a S7-200 PLC. Through analyzing the operation principle of mixer, main functions and specifications of the system are proposed. In this paper, the hardware constitution and the software design method of the system are introduced in detail, and the working process of the asphalt concrete mixer can be controlled automatically and intelligently in real time. Moreover, the functions of batching control, process monitoring and data management has been realized. Test results show that the asphalt concrete mixer works stably and reliability.
Research of the Mechanical Properties for Lazurite with an Open-Type Modeling
Authors: Lin Han Pin , Yu Yuan Chung , Chen Chen Liao
Published: June 2012

This study employed a new modeling technology for lazurite. The related mechanical properties are explored, including the surface roughness, fragility and its morphology. It is found that the properties were improved; for example, the average roughness is reduced from 10.93m to 0.93m and the toughness is increased. We attribute the increase of toughness to a fine morphology with the new technology. Also it cost down 72%.
Simulation of Digital Beam Forming for Radar Seeker
Authors: Yang Yang , Yi Wei , Li Nan
Published: June 2012

A scheme for simulation of DBF used in radar seeker by Simulink is proposed in this paper. Considering the feature of digital devices, an optimized modular simulation model is built up. Experiments show that the model parameters are flexible and results are reliable, which can be used in hardware design for reference.
Influence of Heat Treated Temperature on the Photoactivating Property of Nanometer ZnO/SnO2 Powder
Authors: Huang Xin You , Gao Chun Hua , Chen Zhi Gang
Published: June 2012

Nanometer ZnO/SnO2powder was prepared by coprecipitating method with SnCl4•5H2O, ZnNO3•6H2O, HCl, NaOH as raw materials. Influence of heat treated temperature on the photoactivating property and structure and material phase of nanometer ZnO/SnO2(ZnO/SnO2=4/1(mol ratio)) compound photocatalyst powder was studied by X-ray diffraction (XRD) and transmission electron microscope(TEM) and the degradation of methyl orange solution as a reaction model. The results show that the photoactivating activity of ZnO/SnO2powder starts increasing and then decreasing when heat treated temperature increases. The photoactivating activity of ZnO/SnO2powder is maximum, particle size is 20-30 nanometer and dispersion is good when heat treated temperature is 650°C. The photocatalytic activity of ZnO/SnO2powder gradually reduces, dispersion is not good and there is Zn2SnO4crystal phase when heat treated temperature is above 750°C.
High-Precision 3D Modeling Method Based on Terrestrial Image Sequences for Alpine-Gorge Area
Authors: Su Bo , Li Hao , Wang Ya Qin , Yang Biao
Published: June 2012

The traditional measurement methods cannot adapt to the arduous topography of alpine-gorge area. Aiming at the topographical features of alpine-gorge area, we will introduce a general terrestrial method of multi-baseline photogrammetry basing on digital camera here, and then the paper mainly studies the metrization method of common digital camera and matching method of the digital image sequences of alpine-gorge area. Through the metrization of common digital camera, the efficiency of terrain data collection will increase in the alpine-gorge area, and the requirements of operations on the image control and algorithm will reduce. The combination of seed points and multiple constraints in multi-baseline stereo matching will help to solve many problems, such as shading, severe distortion between the left image and the right one, and the inconformity of scale. The modeling process stated above is quite fast and highly precise, and the three-dimensional modeling experiments show that the relative accuracy can reach from 1 / 8000 to 1 / 12000.
Application Research of Stadiums Smart Lighting System Based on ZigBee
Authors: Wang Zhong Xiao , Sun Jing
Published: June 2012

This lighting system is a versatile remote control for stadiums smart lighting application. This paper describes the design of a high-brightness LED system, which demonstrates wireless communication using Freescale’s MC13213 device, high-brightness LED dimming control using Freescale’s MM908E625 and the 3-axis acceleration sensor MMA7260QT from Freescale. Advantages of using LED lighting are a long operating life, no fragile glass, no mercury, and low-voltage DC operation. In the system, each wireless part communicates over the RF medium using the freely available software stack SMAC from Freescale. At last , the paper analysis the dimming and itensity of the smart lighting system.
Liner Model of Two-Stage Server Numbers and Load Throughputs
Authors: Huang Zhen Sheng
Published: June 2012

This paper discuss Web servers load sharing techniques based on Domain Name Service, identifiers, and two-stage reliable and scalable Server architecture combine with DNS and identifier. Quantitative analyses the performance of the architecture and the relationship between the load throughputs and two-stage server numbers, and than obtain an approach liner regression model.
An Automatic Registration Method for Multi-Modal Images Based on Alignment Metric
Authors: Xia Ying Jie , Yin Jian Qin , Chen Rui
Published: June 2012

There are some methods such as mutual information, alignment metric and so on. But they aim at registration of multi-modal images whose sizes are same. And there are few researches on registration of multi-modal images whose sizes are different. In this paper, an automatic registration method for multi-modal images based on alignment metric is proposed. In order to look for the best registration location of two multi-modal images, genetic algorithm is used in the method for iterative search. Alignment metric is used as the fitness function of genetic algorithm. It is proved that automatic registration for multi-modal images of different sizes can be realized. And it has high accuracy and robustness.
A Modeling Method of Wideband Devices Based on Modified Nodal Analysis
Authors: Lu Feng , Lu Jia
Published: June 2012

According to the simplified circuit partitioning principle, this paper improves the Modified Nodal Analysis(MNA) of wideband Equivalent Circuit Model(ECM). The form of upconversion impedance is transformed from series into parallel. The results show that in the parallel form, the verification process of impedance type has been eliminated and it will not introduce new nodes. At the same time, the amount of computation has been reduced. The maximum relative error of measured data with this model fit is less than 0.693%. The simulation results and ECM test data are consistent with better at 0 to 8GHz frequency range.
The Numerical Simulation on the Atomization Process of Fluid Movement in the Jet Exhausting Atomization Nozzle
Authors: Zhu Yan Song
Published: June 2012

The atomization process of liquid droplet is an important stage in the fluid movement process in the jet exhausting atomization nozzle. This stage is directly influenced on the diameter and desperation of water droplet. Today two-dimensional model is often used in the most common simulation framework. But the atomization process in nozzle is usually happened in the three-dimensional model, so the results are not quite agreed with the practice. In this paper, a new three-dimensional model was proposed to study the mechanism of the atomization process. After applying the VOF method and turbulent model in CFD software Fluent, a numerical simulation was performed to analyze the mechanism of atomization process and some related factors affecting the atomization. Results indicated that the shapes of atomization were accorded with experimental investigations. According to the results, the necessity of further characteristic parameters on the atomization process was analyzed.
Flight Rerouting Path Planning Based on Artificial Potential Field and Genetic Algorithm
Authors: Wang Xing Long , Li Hui , Wang Fei
Published: June 2012

Severe weather is a threat to flight safety and the main reason for delays. Rerouting strategy can effectively avoid severe weather, and rerouting path planning is a key issue of rerouting strategy. Aiming at the free flight, an improved artificial potential field model was used to generate a single flight rerouting path. Then genetic algorithm was used to select the best flight path from multiple paths. Finally, a numerical example was carried out and the relevant parameters were analyzed. The results show that the artificial potential field and genetic algorithm can achieve optimum rerouting path, and the relevant parameter values must be in a certain range to get the optimum solution.
Design Methodology for Multipliers with Active Leakage and Dynamic Power Reduction
Authors: Tian Xi , Qiao Fei , Dong Zai Wang , Liu Yu Jun , Zhao Yu Ting
Published: June 2012

A novel design methodology for multipliers to reducing both active leakage and dynamic power using dynamic power gating is presented, where sleep transistors are inserted between the real and virtual ground rails of various parts of the multiplier which could be selectively turned on/off. On-chip sleep signals are generated from one input signal of the multiplier which has larger dynamic range. By detecting the magnitude of the input signal, the idle parts of the multiplier are identified and the power gating schemes are dynamically applied even when the multiplier is performing useful computation. Simulations show that the total power dissipation of the proposed multiplier could be reduced up to 39.3% in a typical DSP application.
Summarization on Stability of Wind Power Systems Based on Bifurcation Theory
Authors: Zhou Xue Song , Zhai Hua Xin , Ma You Jie
Published: June 2012

With wind farm capacity continuously increasing, remarkable characteristics of wind power make nonlinear dynamic characteristics of wind power system more apparent than conventional power system. Domestic and international experience shows that the voltage instability is main forms of wind power system instability. The bifurcation theory is one of the most powerful tools in analysis of structure stability of nonlinear dynamic system. Therefore application of bifurcation theory not only reveals the voltage stability mechanism, but also has important theoretic value and practical value for the security analysis of the whole power system, especially for voltage stability of wind power system.
The Study of the Nonstationary Signal in Fault Diagnosis
Authors: Xuan Zhao Yan , Ge Miao
Published: June 2012

In this paper, the space time-index plots were introduced and used to determine the nonstationarity of the fault diagnosis in order to handle faults in the nonstationary stage. By using the decomposition and reconstruction of wavelet transform for nonstationary signal, the author targeted on the bandwidth and select information with pertinence, and then analysed the reconstruct signal spectrum for extracting the typical character of fault. The results show that the space time-index method is applicable to judge the nonstationary and the wavelet transform method in fault diagnosis is effective for the nonstationary signal.
The Elastohydrodynamic Lubrication Analysis of Starved Water-Lubricated Rubber Bearing
Authors: Zhao Hui , Wang You Qiang
Published: June 2012

Water becomes a good application prospect lubricant for its low cost, energy saving, good safety and environment friendly characteristic. A bearing microscopic surface pitting lubrication model was established, the water condition of it was introduced and the effects of the speed and the load on the film thickness were discussed.The result show that with the provided water film thickness increases, the film thickness also increases. However, when it is added to a certain degree, the film thickness will no longer change, there exists a critical point. Under water-lubricated conditions, the film thickness and minimum film thickness are increased greatly with the increase of speed and decreased greatly with the increase of load in both staved and full water conditions.
Study on the Structure and Properties of Novel Impact Resistance Fabric Composites
Authors: Song Meng , Zhang Chen , Song Zhen Yu , Yan Nan , Wu Si Zhu
Published: June 2012

In this study, the Kevlar fabric composites were prepared by shear thickening compound to get the high impact resistance. The characterizations of the produced polyborondimethylsioxane (PBDMS) have been obtained by Differential Scanning Caborimetry(DSC), Thermal Gravimetric Analysis(TGA), etc. The controlled stress rheometer was used to characterize the rheological property. Meanwhile the ballistic and stab tests of this Kevlar composite were investigated and found to exhibit significant improvement. The mechanism of energy absorbing was tentatively discussed. It showed that these novel energy absorbing materials could be potentially used to fabricate flexible body armors and high-grade sports accessories with good perspective.
Microstructure and Properties of Grade 700MPa Pressure Vessel Steel with Large Heat Input Welding
Authors: Ding Qing Feng , Wang Tian Sheng , Liu Wen Yan , Wang Xian Jun , Liu Wen Bin , Li Ming
Published: June 2012

The microstructure and properties of grade 700MPa steel with large heat input welding and its heat affected zone (HAZ) were investigated by use of the metallography, scanning electron microscopy, mechanical testing and welding thermal simulation. The results showed that the mechanical properties of the steel meet the technical requirements, namely the yield strength ReL≥570 MPa, the tensile strength 685MPa≤Rm≤830MPa, the elongation A≥17%, the -20°C impact energy KV2≥54J and the -20°C impact energy of HAZ≥47J. The steel also had good match between strength, toughness and anti-high heat input welding, the microstructure was tempered sorbite with small dispersed composite inclusions, which promoted the formation of acicular ferrite and were beneficial to the improvement of HAZ toughness.
Interaction between a Screw Dislocation Located in Strained Reinforcement Layer and a Lip-Shaped Crack
Authors: Yu Min , Liu You Wen
Published: June 2012

The paper is aim to investigate the interaction of a screw dislocation in strained reinforcement with a lip-shaped crack under remote longitudinal shear load using complex variable method of Elasticity. The exact solution of complex function of the matrix and the renforcement layer are obtain in series form; then, the expressions of stress field, image force and stress intensity factor of crack tip can be derived; finally, numerical disccusions are pesented and the results shows that the lip-shaped crack in reinforcement layer has interference effect on the interaction of dislocation and reinforcement layer, and the eigenstrain in x-direction has little effect on image force; however, the eigenstrain in y-direction has great influence on image force.
Influence of Inclusions on Strength and Toughness of X70 Pipeline Steel Girth Weld
Authors: Cheng Yi Yuan , Chen Zi Zhen , Niu Yong Jun , Wang Zheng Fang
Published: June 2012

In this paper, SEM, EPMA, and micro shear experimental method were applied to analyse the structure, inclusion morphology and composition, micro-area strength and toughness of the X70 pipeline steel girth weld joint. The results show that inclusions are mainly nonmetallic oxides, sulfides and calcium compounds. The length of inclusions can be up to 1mm, which have substantially reduced the strength and toughness of weld joint. By the combining effect of internal and external force, cracks tend to initiate around inclusions and propagate along the direction of inclusions, and finally reduce the impact toughness of girth weld.
The Weighted Error Estimation of Finite Element Method for Two-Point Boundary Value Problem
Authors: Wang Qi Sheng , Lai Jia Dao
Published: June 2012

In this paper, the weighed error estimation of finite element method for the two-point boundary value problems are discussed. Respectively, the norm estimation of the H1 and L2 are obtained.
Construction of Planar Dynamic Systems with Function of Non-Linear Angle Variables
Authors: Sun Yan Ling , Zheng Li , Hou Jing
Published: June 2012

This paper constructs the planar dynamic systems with non-equidistant cyclic windows. To generate planar tiling images with different visual effects by the same iterative mapping, we propose a method that allows the planar tessellations to be constructed by a planar dynamic system with non-equidistant cyclic windows. A family of iterative mappings are constructed which generate cyclic windows of variant size in the dynamic plane by incorporating cosine functions and non-linear angle variables with the same parameters. Filled-in Julia sets in different cyclic windows are created by generating the coordinates of any cyclic windows. The images in different windows are continuous but with individual structures. We can choose any cyclic windows as the basic computing region and stretch or compress it into a square, which is transferred to the plane to compose the planar tilling. Experimental results show the effectiveness of the proposed approach.
3D Finite Element Analysis of Single Cylinder Diesel Engine Crankshaft
Authors: Zheng Bin , Liu Yong Qi , Liu Rui Xiang , Meng Jian
Published: June 2012

In this paper, with the ANSYS, stress distribution and safety factor of crankshaft were analyzed by using 3D finite element method. The results show that the exposed destructive position is the transition circular bead location of the crank web and the crankpin. Maximum stress is 118 MPa. Safety factor is 2.72. Maximum deformation is 0.773 mm. Crankshaft satisfies the design requirement.
The Realization of Fuzzy Adaptive Filtering Algorithm
Authors: Liu Ji Guang , Wang Hai Yang
Published: June 2012

This paper introduces a kind of fuzzy adaptive filtering algorithm. The whole process is divided into four steps. Plenty experimental simulation have been made, which has a good results using these methods. On this the premise which the signal detail is not damaged, this filtering algorithm can not only remove pulse but also has a higher capability of noise reduction. It have been verified by actual use and experimental simulation that this filtering algorithm not only has the all advantages of mean filtering and median filtering but can avoid edge blurry of signal, which can’t be realized using the mean filtering and the median filtering under bigger windows .
A Line Enhancement Algorithm for Infrared Image Based on Ridgelet
Authors: Shi Shuang , Qu Shi Ru , Zhao Hai , Chen Fu Long
Published: June 2012

In order to well detect target’s line character for infrared image, we propose improving line character in image through using ridgelet transform which is a kind of multiscale geometric analysis tool and it is especially suitable for describing the 2-D signals which have linear or super-plane singularities. This paper briefs the principle of ridgelet transform and explains our enhancement algorithm in some detail. Its core consists of the method of tensile scale of coefficient in Radon transform domain, filtering method in processing of one dimensional wavelet transform and the algorithm steps of improving line character. It reconstructs images and compares with the other traditional method as presented and analyzes scale of coefficient and time complexity. Our enhancement method is proved effective preliminarily by experimental results.
A Image Enhancement Algorithm Combined Wavelet Transform with Image Fusion
Authors: Luo Sheng Min
Published: June 2012

Aiming at problems of poor contrast and blurred edges in degraded images, a novel enhancement algorithm is proposed in present research. The algorithm utilizes wavelet-based image fusion to accomplish the duplex enhancement task. Experiment results prove that the proposed enhancement algorithm can efficiently combine the merits of histogram equalization and sharpening, improving both the contrast and sharpness of the degraded image at the same time.
Moving Object Detection Based on Edge Difference and Contour Matching
Authors: Liu Wei , Xu Xue Jun , Fu Bi Tao , Zhu Xi
Published: June 2012

This paper presents an improved method to detect moving object and obtain the relative accurate location. First we detect the edge difference of continuous frames. Then we utilize the contour matching to find the edge pairs in order to reach a good detection of the moving object and location. The extensive experiments show that our method is robust and efficient to the moving object detection.
A Method of Improving Calculation Accuracy in Difference Schemes
Authors: Han Ling Yan , Cheng Guang He , Zheng Xiao Shi , Wang Qian , Jin Ying Ji , Hao Feng Qi
Published: June 2012

To calculate difference scheme’s accuracy of differential equation, the normal way is using Taylor format. This paper utilizes tectonic process of differential format to calculate truncation error and gets the accuracy. Compared with the traditional way, not only reduces the amount of calculation, but also calculates the accuracy more quickly and accurately for high-order equations.
Study on Identification Algorithm of EEG Imaginary Movements
Authors: Zhou Jing , Li Li Jun , Li Ning Shan , Wu Xiao Ming , Yang Rong Qian
Published: June 2012

Movement whether it is actual or imaginary can produce different electroencephalogram (EEG) signals. How to extract features of signals and accurately classify them is a key to brain-computer interface(BCI) system. In the paper, BCI competition data downloaded from BCI website are used as study object, through time-domain analysis and frequency-domain analysis, according to the attribute of event-related synchronization (ERS) and event-related desynchronization (ERD) during imagery movement, energy difference of lead C3 and C4 are selected as features and wavelet package is used to extract them. Probabilistic neural networks (PNN) is used as classification method. Compared with other two calssification methods such as support vector method (SVM) and liner classifier, the classification accuracy rate of PNN reaches to 89.2% steadily and is higher than them. It is proved that the method provided in the paper are effective for identifying imaginary movements.
An Analysis of Archiving Strategies in Web Archive
Authors: Li Ya Feng , Lin Ying
Published: June 2012

Web archive is an important technology in the field of data storage and Internet applications. Over the years, many countries have developed various system and prototype. The archive strategy is one of the key elements in Web archive. This paper review the storage strategies developed by several international projects, focusing on the analysis of the four strategies: archiving with external index, archiving with multi- master, format migration archiving, and characteristic described archiving. After summing up the advantages and disadvantages of these strategies, the proposals on the development direction and research content of archive strategy are given at the end of the article.
Acquisition Algorithm for GPS Signal Based on Frequency Shift Method
Authors: Zhu Jian Liang , Bo Yu Ming , Zhang Jie
Published: June 2012

In this paper, we come up with the idea of using frequency shift method to strip carrier when acquiring the GPS signal. The RF uses the quadrature demodulator and dual channel to sample the signal, forming the IF digital signal in I channel and Q channel. The paper derivates the mathematical formula of the frequency shift method, and compares the trigonometric function method with it from the aspect of schematic diagram and calculating. Also, we make simulation of the two schemes using Matlab for both true signal and analog signal. And it comes out that the frequency shift method has got a much greater correlation peak than the trigonometric function method. So we come to the conclusion that it is better using the frequency shift method to acquire signal in low signal intensity.
Analysis of FBG Reflection Spectrum with PSO Algorithm
Authors: Wu Zhao Xia , Chen Shu Qiang , Wang Jun Wei , Wang Li Fu
Published: June 2012

When the parameters were measured by using fiber Bragg grating (FBG) in practice, there were some parameters hard to measure, which would influenced the reflective spectral of FBG severely, and make the characteristic information harder to be extracted. Therefore, particle swarm optimization algorithm was proposed in analyzing the uniform force reflective spectral of FBG. Based on the uniform force sense theory of FBG and particle swarm optimization algorithm, the objective function were established, meanwhile the experiment and simulation were constructed. And the characteristic information in reflective spectrum of FBG was extracted. By using particle swarm optimization algorithm, experimental data showed that particle swarm optimization algorithm used in extracting the characteristic information not only was efficaciously and easily, but also had some advantages, such as high accuracy, stability and fast convergence rate. And it was useful in high precision measurement of FBG sensor.
Study on Client-Side Color Reproduction Methods of Network Printing
Authors: Li Bing Fang
Published: June 2012

Because of the current network printing, exists the problem about the long print cycle, expensive and big chromatic aberration of the client display color reproduction. The article gives a method to gets the printing reproduction data and gets WYSIWYG about network printing client desktop displays color. On the basis of client's desktop display color, with the help of network printers printing technology, image processing software, visual observation of network clients and network form, the client desktop color display data is gotten. By the software reduction calculation, the method implements consistent the effect between the client-side displays color and printing color. The demonstration shows that it can solve the problem of network printing client display color printing reproduce, improves the quality of network printing, reduces network printing cycle.
Comparison of Multispectral Image Processing Techniques to Brain MR Image Classification
Authors: Chen Yen Sheng , Chen Shao Hsien , Liou Jeih Jang
Published: June 2012

Brain Magnetic Resonance Imaging (MRI) has become a widely used modality because it produces multispectral image sequences that provide information of free water, proteinaceous fluid, soft tissue and other tissues with a variety of contrast. The abundance fractions of tissue signatures provided by multispectral images can be very useful for medical diagnosis compared to other modalities. Multiple Sclerosis (MS) is thought to be a disease in which the patient immune system damages the isolating layer of myelin around the nerve fibers. This nerve damage is visible in Magnetic Resonance (MR) scans of the brain. Manual segmentation is extremely time-consuming and tedious. Therefore, fully automated MS detection methods are being developed which can classify large amounts of MR data, and do not suffer from inter observer variability. In this paper we use standard fuzzy c-means algorithm (FCM) for multi-spectral images to segment patient MRI data. Geodesic Active Contours of Caselles level set is another method we implement to do the brain image segmentation jobs. And then we implement anther modified Fuzzy C-Means algorithm, where we call Bias-Corrected FCM as BCFCM, for bias field estimation for the same thing. Experimental results show the success of all these intelligent techniques for brain medical image segmentation.
The Study and Design of QR*-Tree Spatial Indexing Structure
Authors: Song Xiao Yu , Wang Yong Hui , Wang Shou Jin
Published: June 2012

In this study, we will discuss a fast spatial indexing structure called QR*-tree based on R*-tree and quad-tree. Now, R*-tree and R-tree are widely used in spatial database as a spatial indexing structure, But for each algorithm alone, it is not suitable for the huge data volume. The hybrid structure that we proposed is composed of many R*-trees based on space partitioned by quad-tree. Although it demands more storage space than R*-tree or quad-tree, it gains better performance in insertion, deletion, and searching especially, and the more the amount of spatial data is, the better performance the hybrid-tree has.
The Analysis of Single-Radio Mode, Dual-Radio Mode and Multi-Radio Mode WMN’s Capacity
Authors: Wei Liu
Published: June 2012

WMN is the abbreviations of Wireless mesh networks. Along with the evolution of WMN, there appears single-radio mode WMN ,dual-radio mode WMN ,multi-radio mode WMN and their mixed mode WMN. Single-radio mode WMN network has the lowest capacity and the lowest cost, dual-radio and multi-radio mode WMN are better than single-radio mode WMN, multi-radio mode WMN has the largest bandwidth and flexibility, and has obtained the large-scale application.
A New Method for MIMO-OFDM Channel Estimation Based on Discrete Wavelet Transform
Authors: Shi Hui , Song Ren Wang , Wang Gang Fei
Published: June 2012

This paper puts forward a suitable channel estimation scheme for multiple input multiple output and orthogonal frequency division multiplexing system (MIMO-OFDM) based on discrete wavelet transform. According to the least-squares standard (LS), this plan uses pilot to estimate the unit impulse response of MIMO channel firstly, then does wavelet denoising in changing domain, in order to reduce the frequency spectrum leakage and improve the estimation precision. At the same time, this method does not need to know channel information in advance, and can follow up the changes of channel on time with good error rate performance.
Two-Factor Authenticated Key Exchange Protocol in the Three-Party Setting
Authors: Hwang Ren Junn , Su Feng Fu , Huang Loang Shing
Published: June 2012

This paper proposes a three-party authenticated key exchange protocol using two-factor including a password and a token. The proposed protocol allows two users to establish a session key through a trusted server with whom they both share a human-memorable password and a token. Over the past years, many three-party authenticated key exchange protocols have been proposed. However, many proposed protocols use smart cards with tamper-resistance property as tokens. It is not practical by using smart cards because of the high cost and the infrastructure requirements. Therefore, the proposed paper only uses a common storage device such as a USB memory stick. We believe the proposed protocol is suitable for practical scenarios.