bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Tillage Systems on Soil Profile Construction and Aggregate Stability in the Songliao Plain Cornbelt
Authors: Wang Hong Bin , Zhao Lan Po , Liang Wen Ju
Published: October 2011

In order to improve black soil productivity in the Songliao Plain Cornbelt, a new tillage technology “deep plowing with mulching” was established. The effects of different tillage systems (deep plowing with mulching, subsoiling tillage and conventional tillage) on soil profile construction and aggregate stability were studied in this paper. The results showed that different tillage systems led to different patterns of soil profile construction; the deep plowing with mulching, subsoiling tillage and conventional tillage formed “flat type”, “undulated type” and “groove type” in the interface between plow layer and plow pan, respectively. Compared with subsoiling tillage and conventional tillage, deep plowing with mulching significantly increased the contents of macroaggregates, and decreased the aggregate deterioration rate in the plow layers. This work demonstrates that the new tillage technology could promote soil aggregate stability and contribute to soil structure improvement in the Songliao Plain Cornbelt, China.
The Application of Statistical Analysis Technique in Welding Training
Authors: Zhang Fang Zhou , Dong Xiao Ge , Ma Xi Bao , Yan Hu Yong , Yang Li Quan
Published: October 2011

In the welding training process, due to a large amount of training data, artificially can’t from these data information to evaluate the quality of teaching and learning. The paper through statistical analysis technology, research the source of training period based on the records of teaching and learning , thus targeted training , shorten training cycle to improve work efficiency.
Traffic Flow Model Modification on Ice Condition of Road
Authors: Li Yang , Chu Jiang Wei
Published: October 2011

The paper analysis the influence of ice snow on flow at the view of the driver and the car, and through measuring a certain road in Heilongjiang province, getting three parameters of flow, speed and density of early high peak period of the ice snow road and normal road. The data that passes the actual diagraph builds up the transportation to three parameters of flow speed-density model, taking this model as the foundation, deducing a speed-density model. Pass the method that begs the pole value to the speed-discharge model, get to ice snow and no ice snow two kinds of appearances of the research road segment of go through the ability physically. Pass the research road segment the transportation environment and the road line forms of the place, established to affect the factor that that road goes through the ability physically and it to should of coefficient, thus build up the influence factor model that rises the calculation to go through the ability physically.
A Fuzzy Logic Based Information Security Risk Assessment Method
Authors: Yang Ya Ling , Zhou Yan Hui
Published: October 2011

Risk assessment for information security is uncertainty. To control these uncertainties is of great significance for effective risk assessment [1].There are many assessment methods, and the conclusions from them are less clear. This paper presents a fuzzy logic based information security risk assessment method FLISRAM. In this method, the results are from a comprehensive assessment for assets, threats and vulnerabilities of the information system.
Balancing and Optimization of Vacuum Cleaner Assembly Line
Authors: Ma Yan Hua , Kong Fan Sen , Jiang Ying , Zhang Yu , Ao Yan
Published: October 2011

The article elaborates the fundamental notion theory of assembly line balancing, aiming at F company’s assembly line actuality. It solves the practical problem occurred on production line by using heuristic method, and finally uses the methods of allocation in operations research. After the manufactory line balancing analysis, it raises the assembly efficiency obviously. Heuristic method is simple and practical to master, and the method provided in this paper could be popularize to other similar manufacturing factory.
The Optimal Design of ECT Electrodes Array Based on APDL
Authors: Ma Min , Hou Min , Zhang Cai Xia , Han Lu Jun
Published: October 2011

A model of Electrical Capacitance Tomography (ECT) electrodes array was established by ANSYS Parameter Design Language (APDL). A analysis platform of ECT is developed through the macro feature of APDL for the function of interaction. Based on this fast and approximate calculation of capacitance, optimal design will be put forward more conveniently.
The Research Progresses of Controlling and Repairing of Water Pollution and Biotic Integrity Maintaining
Authors: Wang Hong Wei , Cai Duan Bo , Li Kai Ming , Nan Bing Xu , Xu Hai Ming , Ma Liang
Published: October 2011

With the rapid development of economy and society in China, numerous human activities, including water pollution, overfishing, irrigation, etc., have had a tremendous negative impact on aquatic ecosystems. Ecosystem integrity had also been damaged to some extent, and many problems cannot be effectively resolved by using traditional methods .The research of the causes of changing in water biotic integrity had important practical significance for the sustainable development of China's economy and society. Therefore, there has been a lot of attention on controlling and repairing of water pollution , biotic integrity maintaining in the actual production, The use of new methods , a variety of methods for water pollution combined with analysis, health assessment has also gained great progresses in recent years. This paper reviews the research progress in controlling and protecting water environment and maintaining biotic integrity.
Experimental Study on the Release Characteristics of Chlorine and Alkali Metal during Co-Firing of Wheat Straw and Lean Coal
Authors: Yue Mao Zhen , Wang Yong Zheng , Li Xiu Juan
Published: October 2011

Experiments were carried out on a tubular furnace. The results showed that the released amount of K and Cl increased with the wheat straw share of the blends, meanwhile the released amount of Cl was far more than that of K. Al and Si from coal can capture K to form KAlSixOy, which would promote the release of HCl. The activity of Al and Si increased with the temperature rising. During combustion, Ca and Mg can react with Al and Si, resulting in an increased release of K and a decreased release of HCl indirectly.
Study on Stochastic Assembly Line Balancing Based on Improved Particle Swarm Optimization Algorithm
Authors: Zhu Hua Bing , Yu Feng , Xi Yun , Wang Long , Zhang Juan
Published: October 2011

Focusing on a particular assembly line balancing problem of which the task time is a stochastic variable, a stochastic model is established, which aimed at maximization of assembly line balancing rate, completed probability and smoothness index. Simultaneously, an improved particle swarm optimization algorithm is proposed to solve this problem and a reasonable chromosome coding method which effectively prevent to generate infeasible solution is designed. For this reason, the algorithm convergence rate could be improved. At last, rear axle assembly line balancing designs of an automotive part company is taken to test validity of algorithm. Availability of the algorithm is verified by this example.
Inset-Fed Patch Antenna for LTE Application
Authors: Zhao Xia
Published: October 2011

In this paper, a rectangle patch antenna at 2.53GHz is designed for LTE system. In order to acquire the desired center frequency, width of the conductor in the antenna is adjusted before and after impedance matching. At last, the patch antenna get 2.96dB gain and VSWR less than 1.8 during bandwidth of 40MHz.
The Preparation and Characterization of Organic–Inorganic Hybrid Material Amino Monolithic Column for Capillary Electro Chromatography
Authors: Li Bao Hui , Tian Bao Juan
Published: October 2011

In this paper a novel hybrid organic–inorganic amino hybrid material monolithic column for capillary electro chromatography (CEC) is preparation and characterization. The amido hybrid material monolithic column was prepared in situ co-condensation of tetraethoxysilane (TEOS) with 3-aminoproplytriethoxysilane (3-APTES) via sol-gel procedure. The all kinds of factors that effect the morphology of monolith column were investigated. The results showed that the structure of monolithic column could be adjusted easily through altering the composition of sol solution.
Analysis and Design of IGBT Driving and Protection Circuit for Photovoltaic Grid-Connected Inverter
Authors: Gong Shu Qiu , Tang Ming , Cui Li Yan
Published: October 2011

For the characteristics of high frequency of switching devices in the photovoltaic inverter and complexity of circuit topology, the insulated gate bipolar transistor driving protection circuit is designed which is suitable for photovoltaic inverter. The circuit which is based on thick film structure of M57962L has isolated power supply and threshold voltage regulator circuits. The control and regulation can be achieved precisely for the threshold voltage of over current protection. The internal structure of M57962L has been analyzed here. The process of slow turn off action is observed practically. For the circuit periphery parameters of M57962L, the general calculation methods are given according to various models and the level of protection for IGBT. The practical application shows that the method is correct and effective.
Experimental Research of Strain and Temperature Based on EFPI Sensor
Authors: Yang Xiu Feng , Zhang Chun Yu , Tong Zheng Rong
Published: October 2011

An extrinsic Fabry-Perot (F-P) interferometric (EFPI) sensor by using simple etching and fusing method is proposed and demonstrated. The cavity is formed by wet chemical etching of multi-mode fiber (MMF) end face in hydrofluoric acid solutions, and then it is fused to the end of a single-mode fiber (SMF) to form an extrinsic F-P structure. The strain and temperature of EFPI sensor are studied experimentally. The experimental results show that the interference wavelength becomes 2.648nm longer while the strain increases from 0N to 637N, and the strain sensitivity is about 0.004nm/N, and linearity is 0.999. The interference wavelength becomes 0.032nm shorter while the temperature increases from 20°C to 100°C. This kind of sensor has the many advantages of easy fabrication, good reliability, high-repetition, small size, low cost and mass-production, which offers great prospect for sensing applications.
Influence of Carbon Dioxide on the Characteristics of a Limiting Current Oxygen Sensor
Authors: Zhou Zhen , Jian Jia Wen , Wu Xiang
Published: October 2011

The influences of CO2 on the characteristics of a limiting current oxygen sensor in CO2- O2-N2 atmospheres were investigated. The studies indicated that the I-V curves appeared two-stage current plateau at (0~2) V operation voltage in CO2-O2-N2 atmospheres with CO2 concentration changed from 2.03% up to 12.18% and oxygen concentration remained at 5%、7.5%、10%, respectively. The first saturated current IL1 appeared in the voltage range of 0.8～1.4 V while the second saturated current IL2 appeared in 1.65～1.82 V, respectively. The difference between the two current platforms (IL2-IL1) and (-ln(1-XCO2)) showed a good linear relationship. And the oxygen sensor’s up-response time and down-response time to CO2 were both within 30s. The concentration of CO2 can be detected at a high working voltage.
The Simulation of Digital PI Controller Based on VHDL
Authors: Rong Xiao Fei
Published: October 2011

The paper designs digital PI controller based on VHDL, which achieves closed-loop speed control of the submerged arc welding. And the controller has passed the compilation and simulation using MATLAB. The simulation validates that the design accords with the request of PI controller.
Optimization of Reactive Power in BenXi Steel Distribution Feeders Based on RARW-GA
Authors: Li Run Sheng , Fan Ai Long , Guan Da Lu
Published: October 2011

Optimal allocation of reactive power compensation plays an important role in power system planning and design. However, as a non-linear, large scale combinatorial optimization problem, Conventional methods are not normally appropriate for it . A mathematical model is firstly presented in this paper for comprehensive optimal configuration in distribution feeders based on the analysis of engineering factors of reactive power compensation, whose objective is to minimize the annual expenditure involving the devices investment and the income of energy saving, and satisfy all sorts of operation，fixing and maintenance constrains. The control variables include the capacitor banks’ number and capacity of various compensation schemes. RARW-GA algorithm is adopted to solve this problem. The result of calculation and analysis of BenXi Steel group corporation power system shows that the proposed method is feasible and effective.
Design of Bioreactor Control System for Ligament Tissue Engineering
Authors: Wu Xiu De , Wang Xiong
Published: October 2011

An electromechanical control system of a novel bioreactor for ligament tissue engineering, combined with culture medium perfusion control, cyclic mechanical loading and displacement coordinated control, strains and temperature measure and control, based on programmable logical controller (PLC), was designed and implemented. Well-controlled mechanical stimulations (resolution of <0.01mm for translational and <0.1° for rotational strains, cyclic loading frequency of up to 1 Hz) could be applied to the growing tissue, especially to the tissue engineered anterior cruciate ligaments (ACLs). The novel control system could complete detection and control functions of multi-dimensional mechanical strain in the same axis (resolution of 0.01N for tension and 0.01Nm for torsion strains). An online parameter measuring device of PO2 ，which did not consume oxygen and independent of flow rate, and were incorporated into the culture medium recirculation loop, was designed. The displacement and mechanical stimulate coordinated control strategies were achieved. The aim of this control system is to meet the functions of bioreactor for the ACLs tissue engineering in both research and clinical applications.
Efficient Minkowski Sum Computation of General Ployhedra
Authors: Zhang Jian Fei , Guo Xi Juan , Geng Qing Jia
Published: October 2011

We present an algorithm to compute Minkowski sum of general ployhedra, the algorithm removes unnecessary information of computing pairwise Minkowski sum by redundancy analysis and adopt heuristic sorting order to improve computing efficiency of union process, contrast experiments show the algorithm is efficient and suitable for CAD and CAM.
Characterization of Global Form Deviations for Spiral Bevel Gear and Correction of Machine-Setting Parameters
Authors: Xu Zhong Si , Jin Lei , Tian Jin Tai
Published: October 2011

In order to improve the machining accuracy of spiral bevel gear, difference surface was adopted to characterize its global form deviations quantifiably and correct its deviations. The quantitative mathematical relationship between the actual tooth surface deviations of spiral bevel gear and the corrected values of the machine-setting parameters had been referred, and the theoretical correction formula of the global form deviations had been gotten by the least square method. Finally, the pinion of spiral bevel gear in the automobile rear axle has been set for an example to account for the effectiveness of the deviation correction by use of the difference surface method.
Modeling and Experimental Study on Grid-Connected Inverter for Direct Drive Wind Turbine
Authors: Zhou La Wu , Shi Shu Qi , Li Li
Published: October 2011

This paper designs a dual topological structure of grid-connected inverter for high-power wind turbine, and introduces PWM converter's operational state. It establishes mathematical model of grid-side converter for wind turbine, then it puts forward the dual closed-loop vector control strategy of grid-side converter based on dq coordinate. The combination of the dual topological structure and decoupling control realize the functioning of high-power factor and two-way transmission of energy. Grid-side converter can stabilize DC side voltage during rapidly changed wind velocity which led to changes of output power in generator. Active or reactive output current can be adjusted independently. The hardware experiments and simulation results verify the feasibility of the proposed control scheme in both the high stability accuracy and excellent property of grid-connected.
Acoustic Simulation for the Gearing Engagement System
Authors: Li Hong Kun , Ding Jian , Guo Cheng
Published: October 2011

This paper concentrates on modeling the gear transmission system using a three-dimensional finite-element approach for the acoustic radiation analysis and control. The combination of dynamic analysis and vibration response calculation for the gear engagement system can contribute to evaluate acoustic radiation. A case study of for gear engagement system internally excited with gear mesh fluctuation is presented in this research. Acoustic radiation quantity investigation has been carried out by Virtual.Lab Acoustics software. It can be concluded that numerical simulation is very important during gear system design and noise control.
Research on Spiral Bevel Gear Tooth Surface Reconstruction Based on NURBS
Authors: Yang Lin , Ren Shuai Nan , Wang Zhen Yu , Zhang Peng
Published: October 2011

The tooth surface shape of spiral bevel gear is complex. In the detection process of errors tooth surface model is constructed based on coordinate data of limited the actual tooth surface sampling points. The model is used to analysis and manufacture of gear to meet the processing requirements. NURBS (non-uniform rational B-Spline) method is the most effective reconstruction method for geometry there are both freedom and analytic curves and surfaces. NURBS method is used to calculate non-uniform knot vector, NURBS control points and B-Spline inverse and reconstruct tooth surface. Reconstructionof spiral bevel gears in using NURBS is achieved and the tooth surface reconstruction is drawn out in Open GL in VC environment. And then reconstruction error on the tooth surface is analyzed. It proves that using the method of NURBS to reconstruct spiral bevel gear tooth surface is correct and feasible.
A Novel Method of Impedance Measurement Used in Islanding Detection Based on Controllable Short-Circuit Technology
Authors: Zhu Ke , Lu Xiao Hui , Zhang Bo
Published: October 2011

It is very important for a distributed generating system to have an islanding detection part. Focused on the problem of islanding, this paper proposes a new and effective islanding detection scheme: a thyristor is placed between any two phases just by the port of the distributed generator (DG). An artificial short time phase to-phase short circuit is formed by triggering the thyristor periodically when the voltage between this thyristor is almost equal to zero, so the short-circuit current and voltage pulse can be extracted out. Because that short-circuit current and voltage pulse contain plentiful frequency components, the frequency response of system can be acquired according to the theory of harmonic impedance, so that the impedance measured from DG port can be obtained. Whether the DG is islanding can be determined quickly by monitoring the changes of impedance. This method is proved to be correct and effective by theoretical analysis and simulation.
Modeling and Simulation of Stick-Slip Motion for Pneumatic Cylinder Based on Meter-In Circuit
Authors: Qian Peng Fei , Tao Guo Liang , Chen Jian Feng , Lu Bo
Published: October 2011

For the stick-slip phenomenon encountered in the pneumatic cylinder motion in practical application, the stick-slip mechanism was analyzed and an nonlinear mathematical model based on the improved LuGre model of pneumatic cylinder movement was established. The movement of the piston and the pressure of the rodless chamber in the pneumatic cylinder based on meter-in circuit were obtained through solving the differential equations by four-order variable-step Runge-Kutta method. The comparison between simulation and experimental results shows that the established mathematical model can describe the stick-slip motion of pneumatic cylinder with a relatively good accuracy.
Separation Study on Spectral Wear Signal for Engine
Authors: Xu Ze Yin , Xu Qi Sheng
Published: October 2011

The monitoring signal of oil analysis is usually not from a single friction pair but from the whole friction system, which leads to insufficient pertinence of oil analysis. On the basis of proportional relationship between metal constituents of single friction pair namely wear source, constrained linear separation model was put forward to separate spectral wear detection signal to obtain single wear source signal. The application of the model to engine spectral wear detection information shows its availability, and the pertinence of oil analysis has been improved.
Polymer-Liquid Crystal Composites and Applications
Authors: Gao Ya Li , Zhang Dong Lei , Shi Yong Ji , Ye Fang
Published: October 2011

The basic optical and electro-optical effects observed in polymer-liquid crystal composites are described. Special attention is paid to the methods of optimizing polymer-liquid crystal composites optical and electro-optical properties. Finally, the applications of polymer-liquid crystal composites optical properties are given.
Study of Reactive Plasma Sprayed TiN Electrocatalytic Carrier Coatings
Authors: Gao Li Hua , Zhang Jian Xin , Dong Yan Chun , Yang Yong , Yan Dian Ran
Published: October 2011

In this paper TiN coating as an interlayer was fabricated on Q235 steel substrate by reactive plasma spray method and its microstructure and influences on the performance of the Fe/TiN/PO2 electrode were investigated. It is shown that the TiN coating has a rough surface and layered cross-section structure. The coating consists of main TiN phase and a small quantity of Ti oxides. After heat-treated below 550°C the TiN coating is greatly densified due to the increase of Ti oxides, and however the electric resistance of the Fe/TiN samples is still lower than that of the Ti substrate. For the Fe/TiN/PbO2 electrode a rougher surface and more micropores were observed in the active PbO2 coating than on the surface of the Ti/PbO2 electrode. Due to the presence of the TiN interlayer the Fe/TiN/PbO2 electrode shows an accelerated life of 180h under the test condition, which is much longer than 28min of the Ti/PbO2 electrode.
Preparation of Silicon Nan Spheres by Using Electrical Discharge Machining Method
Authors: Zhang Wei , Wang Wei , Hong Juan , Zhang Zhi Wei , Liu Zheng Xun
Published: October 2011

As one of the key technologies, preparation of silicon nanospheres is very important for developing the new types of silicon based solar cells. In this paper, with the establishment of a novel electrical discharge machining (EDM) system and the raw material of heavy doped mono-crystalline silicon (0.01Ω•cm), silicon nanospheres of which diameter are ranging from 25nm to 280nm have been successfully prepared by using EDM method. The micro surface topography and the elements composition are analyzed by the SEM and the EDS methods respectively. The formation mechanism of nanospheres has also been studied.
The Experimental Study on Combustion Characteristics of Corn Straw and Coal Gangue
Authors: Zhou Heng Tao , Wei Yong
Published: October 2011

With a thermo gravimetric analysis apparatus combustion characteristics experiments of coal residue cornstalk and mixtures of them were done at 20 C/min heating rate. Then the combustion characteristic Parameters were obtained by above experiments. The c combustion activation energies were acquired by kinetics analysis. The results show those: the ignition characteristic and synthesis combustion characteristic of coal residue are bad. The ignition characteristic and synthesis combustion characteristic of cornstalk are better. The combustion characteristics of the mixture of coal residue and cornstalk are determined by mixing ratio. The ratio of cornstalk is more and the synthesis combustion characteristic is better.
The Research of SSL VPN Authentication Methods Based on C + +
Authors: Fan Ya Qin , Guo Meng , Sun Chao
Published: October 2011

In order to better meet the government, enterprises, schools and other units of information transmission of the security and confidentiality, this paper studies SSL handshake protocol and SSL Record Protocol, authentication technology and PKI technology, based on in-depth study of Web-based Off mode SSL VPN system architecture, gives a more detailed block diagram of the design ideas and design. Finally, a C + + based on the SSL VPN authentication methods, The results of the research staff with the actual VPN network value.
The System of the Route Back to Show Based on G/S Model
Authors: Yang Wen Hui , Hu Zun Yu , Miao Fang , Leng Xiao Peng
Published: October 2011

In order to meet the efficient use of location services which the user needs, the system of the route back to show has a vital role, and G/S model for the development of location based on services provides a new practical platform of digital earth. This article discusses the system architecture of the G/S model and presents the system of the route back to show based on G/S model, which is in order to address the problem of location services，and the line adjustment algorithm is elaborated when the route deviates from the actual path.
A Text Clustering Algorithms Based on Hidden Markov Model
Authors: Li Wei , Li Mei An
Published: October 2011

Based on the probability model of clustering algorithm constructs a model for each cluster, calculate probability of every text falls in different models to decide text belongs to which cluster, conveniently in global Angle represents abstract structure of clusters. In this paper combining the hidden Markov model and k - means clustering algorithm realize text clustering, first produces first clustering results by k - means algorithm, as the initial probability model of a hidden Markov model ,constructed probability transfer matrix prediction every step of clustering iteration, when subtraction value of two probability transfer matrix is 0, clustering end. This algorithm can in global perspective every cluster of document clustering process, to avoid the repetition of clustering process, effectively improve the clustering algorithm .
A Regularization Method for Downward Continuation of Potential Fields
Authors: Ma Tao , Wu Mei Ping , Hu Xiao Ping , Li Guan Nan
Published: October 2011

Instability is the inherent limitation of downward continuation. Based on integral iteration idea and regularization theory, a regularization method is proposed for downward continuation of potential fields. We also present an L-curve method for the selection of regularization parameter. The improved method is tested on model data both with and without noise. The results show that the new method is much more stable than the iteration method, especially in dealing with low signal-to-noise data, and that it also has a large downward continuation distance.
Design of PCR Primers for the mcrA Genes Detection of Methanogen Communities
Authors: Tuan Nguyen Ngoc , Huang Shir Ly
Published: October 2011

Methanogens play an important role to carbon cycling, catalyzing the production of methane and carbon dioxide, both potent green house gases, during organic matter degradation in anaerobic environments. Therefore, it is necessary to better understand microorganisms that produce natural gas. Indeed, methanogens are difficult to perform through culture based methods. In addition, the culture independent methods using the 16S rRNA gene also revealed some disadvantages. For these reasons, the culture independent molecular techniques using the specific catabolic genes such as methyl coenzyme M reductase (MCR) were studied. In this study, a primer set which can amplify specific fragments from a wide variety of mcrA gene was designed based on the homologous regions of 100 mcrA genes listed in the GenBank. PCR with the mcrA primers amplified DNA fragments of the expected size from all the six samples which obtained from biogas production reactors. In addition, denaturing gradient gel electrophoresis PCR analysis using our designed primers also revealed the diversity of mcrA gene in each sample. These results revealed that our primers were successfully to detect the mcrA genes and it is also helpful to know the diversity of mcrA genes in methanogen communities.
Distributed H∞ Control for Leader-Following Coordination with Switching Topology
Authors: Luo Yan Ping , Gao Li Xin
Published: October 2011

In this paper, we consider multi-agent H∞consensus control problems with external disturbance under the undirected switching topologies. The agent dynamics is expressed in the form of a second-order model and the control laws are neighbor-based feedback laws. By using the model transformation, the multi-agent H∞consensus control problem is converted into H∞ control problem for a switching linear system with special structure. A sufficient condition is established under which all agents can reach consensus with the desired H∞performance in switching topology case by constructing a parameter-dependent common Lyapunov function. Moreover, we give an explicit estimation expression to estimate H∞ performance index. Finally, a numerical example is provided to illustrate the effectiveness of our results.
Effects of the Technical Communication on the Life Cycle of the Products
Authors: Li Xiao Fei , Ge Xin Quan , Jin Chun Hua
Published: October 2011

Through the empirical research on the relation between the quantity and the profits of the enterprises in the mobile phone design service industry from 2002 to 2007, the concept of technology – products life cycle curve is proposed, and the effects of the technical communication on the life cycle of the products are analyzed based on the analysis of the technical features of various phases.
Exploration Based on ZigBee Traffic Signals Area Control System
Authors: Liang Zi Yi , Qu Xin Nan , Zhao Xiang Hui
Published: October 2011

In order to solve the problem of traffic jams, this paper presents a solution about traffic signals area control system based on ZigBee wireless sensor network. The basic idea is to connect the area's traffic lights through ZigBee wireless sensor network according to the traffic flow during a time period where the system located. The command center coordinates and controls the length of the green signal, period and the time of the green signal on all roads through the ZigBee wireless sensor network, so that the motor vehicles which move from corresponding two-way intersections could get through with less red signal. The solution adopts TI's CC2430 RF transceiver chip and analog front-end chip CC2591 and some external circuits to design the hardware circuit of sensor nodes and the central control nodes. Then designs the applications about sensor nodes, central control nodes and management software of control center, which based on the ZigBee protocol stack. Test results show that the performance of the system, such as stability, response speed, could meet the actual demand. It can obviously improve the highway capacity.
Mining Functional Modules in Uncertain Protein-Protein Interaction Network
Authors: Meng Ya , Shang Xue Qun , Miao Miao , Wang Miao
Published: October 2011

Mining functional modules with biological significance has attracted lots of attention recently. However, protein-protein interaction (PPI) network and other biological data generally bear uncertainties attributed to noise, incompleteness and inaccuracy in practice. In this paper, we focus on received PPI data with uncertainties to explore interesting protein complexes. Moreover, some novel conceptions extended from known graph conceptions are used to develop a depth-first algorithm to mine protein complexes in a simple uncertain graph. Our experiments take protein complexes from MIPS database as standard of accessing experimental results. Experiment results indicate that our algorithm has good performance in terms of coverage and precision. Experimental results are also assessed on Gene Ontology (GO) annotation, and the evaluation demonstrates proteins of our most acquired protein complexes show a high similarity. Finally, several experiments are taken to test the scalability of our algorithm. The result is also observed.
Mobile Senor Registration Algorithm Based on Exact Method
Authors: Ge Xian Jun , Li Run Ze , Chen Li Kui , Zhang Xin Ming
Published: October 2011

Exact Method (EX) has been recently proposed to handle the dynamic sensor bias estimation based on the local track estimates at different times, which only apply to fixed platform sensors. On the basis of EX algorithm, an new algorithm is presented to derive the dynamic sensor bias estimation in networked 3-D mobile sensor system based on the local track estimates at different times, which is called MEX algorithm for short. To testify the correctness and validity of the proposed algorithm, the simulations were carried out. And the result shows that the MEX algorithm can effectively estimate sensor measurement biases and attitude angle biases.
Path Planning for Mobile Robot Based on ACA-GA
Authors: Zhang Li Xun , Wang Yin Xue , Wang Bing Bing , Deng Qian , Chen Hao
Published: October 2011

Path planning for mobile robot is a kernel problem in the robot technology area, with the characteristics of complexity, binding and nonlinearity. On account of global path planning for mobile robot in static environment, this paper discussed a method of combining ant colony algorithm and genetic algorithm. After completing a cycle of ant colony algorithm, two paths ants walked were randomly selected, and these two paths were further optimized genetically on the basis of certain crossover rate, if more optimal paths were obtained, the pheromone would be released in the more optimal paths, by this method the diversity of solution could be increased and solution speed be improved. The simulation result has verified the effectiveness of the proposed method.
Pervasive Computing Architecture, Key Technologies and Issues Facing
Authors: Jiang Dai You
Published: October 2011

This paper introduces the concept of pervasive computing, architecture, outlines the key technology of pervasive computing, including: middleware, context-aware technology, database technology, user interface technology, embedded systems technology and adaptive Technology, points out the major issues facing pervasive computing.
Precision Servo Tracking System Structure Method and Accuracy
Authors: Wang Biao , Wang Chang Qing , Ru Feng , Ma Xiao Lan
Published: October 2011

According to precise servo tracking system, proposes the establishment iterating control structure mode correspond to Taylor’s approximation valuation formula, make the system control structure to adapt to the accuracy of the system. On the basis of this structure, based on the analysis of the error transfer function, application error parameters determination and estimate the system accuracy.
A Multi-Object Tracking Algorithm Based on Multi-Camera
Authors: Jiang Ming Xin , Wang Hong Yu , Lin Chao
Published: October 2011

As a basic aspect of computer vision, reliable tracking of multiple objects is still an open and challenging issue for both theory studies and real applications. A novel multi-object tracking algorithm based on multiple cameras is proposed in this paper. We obtain the foreground likelihood maps in each view by modeling the background using the codebook algorithm. The view-to-view homographies are computed using several landmarks on the chosen plane. Then, we achieve the location information of multi-target at chest layer and realize the tracking task. The proposed algorithm does not require detecting the vanishing points of cameras, which reduces the complexity and improves the accuracy of the algorithm. The experimental results show that our method is robust to the occlusion and could satisfy the real-time tracking requirement.
Research of Automatic Fingerprint Recognition Essential Algorithms
Authors: Zhang Jin Hai
Published: October 2011

Fingerprint recognition has wide application prospect in all fields which contain identity authentication. Construction of accurate and reliable，safe and Practical automatic fingerprint identification system(AFIS) has become researc hotspot. Although theoretical research and application developmen of AFIS have got a significant Progress，accuracy of the algorithm and proeessing speeds till need to be improved. In this paper, fingerprint image preprocessing algorithms，fingerprint singular Points and minutiae extraction algorithm and fingerprint matching algorithm are analyzed and discussed in detail.
A New Approximate Joint Diagonalization Algorithm Based on the Fused Complex-Valued Cost Function
Authors: Xu Xian Feng , Duan Chen Dong
Published: October 2011

A new algorithm to solve the fused complex-valued cost function for approximate joint diagonalization (AJD), named CVAJD (Complex-Valued Approximate Joint Diagonalization), is presented. The CVAJD algorithm adopts an iterative scheme to update the demixing matrix through the strictly diagonally-dominant residual mixing matrix obtained in each of iterations. Due to the relaxation of several constraints on the target matrices, it has more general utilizations. Besides, it is also easy to implement. A numerical simulation illustrates fast convergence and good performance of the CVAJD.
Research on Restful Web Services in Java
Authors: Li Hong Jun
Published: October 2011

In order to make the Web services, web sites in Java more powerful and flexible, building unified web applications is vital important. By introducing a new style─Representational State Transfer (REST), this paper studied the Java RESTful frameworks and the ways to develop Restful Web Service in Java. The RESTful frameworks in Java can effectively simplify the web development in many ways.
The Adaptive Ship Motion Control Based on Fuzzy Neural Network
Authors: Hu Guan Shan , Xiao Hai Rong
Published: October 2011

Given the uncertainty of parameters and the random nature of disturbance, a ship motion, is a complicated control problem. This paper has researched adaptive neural network systems and its application to ship’s motion control. In paper, Ship’s mathematical model is researched. Aimed at ship mathematical motion model, the model reference adaptive auto pilot is first designed based on the analysis of the model reference adaptive control theory. We used fuzzy logic and neural networks to design the feedback controller, used multilayer perceptron neural network to design the reference model and the ship course identification model network. Based on the fuzzy control and neural network, an intelligent adaptive control algorithm was presented in the paper. In consideration of the forces and moments from the environmental disturbance, such as winds, waves, currents, etc., Simulation experiments are carried out by using Matlab’s Simulink toolbox. The simulating result indicates the designed adaptive controller can get a good control performance for ship course tracking system.
The Study on the Water Immersing Time Impact over the Concrete Anti- Compression Strength with Rock-Drilling Method
Authors: Zhang Jin Yang
Published: October 2011

Rock-drilling method, as an on-spot test method for structure concrete anti-compression strength is intensively applied in construction, water conservancy, navigation, ports and road building etc and diversified criterions assume prominent differences in preservative conditions before rock-drilling concrete anti-compression strength test. The research result concludes in case the core drilling samples of different diameters and strength are immerged in water up to saturated degree, the anti-compression strength (ACS) is considerably decreased, the smaller diameter and less strength concrete core samples show even worse quality against the original natural dried ones. Only by means of correctly understanding the tested project and better applying of the core drilling test technical criterion can the project structural concrete strength be optimistically mastered.
Simulation Research and Application on Control Technology of Long Concrete Wall Cracks in Basement
Authors: Zhu Ying Zeng , Gao Fei , Kong Jun Dong
Published: October 2011

This paper aims at research on fundamental principles of long concrete wall cracks in basement on the basis of series basic experiments and engineering practices. Relying on typical project, we use ABAQUS finite element analysis software to conduct simulation analysis to provide evidence for integrated control of cracks. Simulation analysis results show that the reinforcement stresses has tight connections with constraint mode of structure, for instance, column side and the location connected with foundation; effective limits of boundary constraints to structure deformation and constraints of free-form deformation on long wall structure make the concentration of reinforcement stresses nearing constraint location relatively obvious; under the effects of temperature and contraction, internal force of concrete wall will be re-distributed, therefore, reinforcement stress of concrete can not directly reveal actual force distribution inside the wall, but the overall trend is close to concentrated pattern of reinforcement stress.
Simulation Analysis of Concrete Dam’s Joints Based on Elastic-Plastic Creep Model
Authors: Huang Yao Ying , Zheng Hong , Zhou Yi Hong
Published: October 2011

When the stress of concrete dam joints during the whole construction process is simulated with the elastic creep model, the simulated result will be larger than the real value if the elastic modulus of the joints take the minimum value and the plastic yield and cracking of joints are not considered; while problems like iterative convergence will appear if the contact element or thin-layer element is applied to the analysis. In consideration of the above factors, an elastic-plastic model, obtained by connecting one or two Bingham elements in series in the conventional model, was carried out for the stress simulation analysis of concrete joints based on the visco-elastic-plastic theory. From the discussion of the feasibility of setting up longitudinal joints in the bottom hole dam section, it is concluded that the concrete joints can be simulated by elastic-plastic creep model presented in this paper, for this method can fairly reflect the deformation stress condition of the concrete joints; in addition, it neither increases the complexity of program development, nor is related to iterative convergence.
Pollution and Potential Biological Toxicity Assessment Using Heavy Metals from Surface Sediments of Liangtan River, Chongqing, China
Authors: Liu Guo Tao , Zheng Xiao Yan , Peng Xu Ya , Li Jian Hua
Published: October 2011

The concentrations of heavy metals (Cu, Zn, Pb, Cd, Ni, Cr, As) in the surface sediment of Liangtan River were determined by using atomic absorption spectrometry (AAS) and atomic fluorescence spectrometry (AFS), and the toxic effects and sediment pollution assessment were conducted systematically by using Sediment Quality Guidelines (SQG), Hakanson Potential Ecological Risk Index. Moreover, the underlying source of heavy metal was analyzed. The results indicated that the concentrations of Cu, Zn, Pb, Cd, Ni, Cr, As were 29.4-158.1, 40.2-291.3, 23.4-148.2, 0.01-0.79, 6.4-106.2, 17.9-170.6, 1.3-45.1mg/kg respectively. Base on the SQG, besides Cd concentrations of few sampling sites were above the threshold effects level (TEL), the rest heavy metal concentrations of most sampling sites were all between TEL and the probable effects level (PEL), and biological toxicity effects may take place, especially Baishiyi, Hangu and Huilongba, harmful biological toxicity effects may frequently take place. Compared to background values of soil heavy metals in the Three Gorges Reservoir Region, the heavy metals in Liangtan River sediments showed higher ecological risk, and the ecological risk of the heavy metals, arranged from the highest to lowest pollution degree, was as follows Cd, As, Cu, Pb, Ni, Zn, Cr.
Ground-Based Microwave Radiometer Profiler Observations before a Heavy Rainfall
Authors: Xu Wen Jing , Liu Hong Yan
Published: October 2011

Ground-based 12-channel microwave radiometer profiler TP/WVP-3000 can provide temperature and vapor density profile per minute up to 10 km height. The observations feature apparent change before heavy rainfall obtained by TP/WVP-3000 is presented in this paper. It demonstrates the detailed thermodynamic features that the atmosphere becomes colder and drier above height 3-4 km about 9 hours before the rain, the integrated water vapor gradually increases from 5 cm to 9 cm, the integrated cloud water change from near zero to 15 mm and the vapor density also increases rapidly about half an hour before the rain, which can be concluded that the radiometer profiler is able to improve the understanding of mesoscale weather in this case due to the profiler significantly improves the temporal resolution of atmospheric thermodynamic observations.
Neotectonic Movement of the Northern East China Sea Shelf Basin
Authors: Hou Fang Hui , Li San Zhong , Zhang Zhi Xun
Published: October 2011

On the base of comprehensive analysis of some new single-track seismic profiles and logging data, the neotectonic movement characteristics of the northern East China Sea Shelf Basin are researched. In the study area, there are intensive neotectonic movement. The main manifestations of the neotectonics include vertical movement, fracture activity and magma activity. The research indicate that the sedimentation centers shift from west to east since Miocene. NE-NNE-striking fault and EW-striking fault are the main active faults. The activity of these faults are gradually later from west to east. The magma activity are frequent and can be divided into three phases in the neotectonic period . They are mainly distribute along active faults. From west to east, the magma activity phases are gradually later. The intrusion gradually weaken and eruption gradually strengthen.
Types and Acoustic Reflection Characteristics of Geo-Hazards in the Western of the North Yellow Sea
Authors: Chen Xiao Hui , Zhang Xun Hua , Li Ri Hui
Published: October 2011

The geological environments in the western of the North Yellow Sea(NYS) are comparatively complicated and pregnant with various geo-hazards. High-resolution sub-bottom seismic data and previous research progress have been used to examine marine geo-hazards’ types, acoustic reflection features, origins and disaster mechanisms. The results indicate that the hazardous types are complicated and multiple in the western of the NYS, including tidal sand ridge, sand wave, tidal erosion gutter, underwater shoal, shallow gas, buried paleo-channel, active fault, irregular bedrock and so on. They have some connections as well as differentiations in their distribution and genesis. This paper can provide the theoretical basis on marine engineering, disaster prevention and mitigation in the western of the NYS . More attention should be given to severe geo-hazards that can constitute direct or potential hazards to the economic development and engineering construction.
Fuzzy Finite Element Optimization of High-Speed Vertical Machining Center Spindle Box
Authors: Cao Ju Jiang , Wang Lei Hua , Lu Jun
Published: October 2011

The key component of the spindle box for using the fuzzy optimization method for high-speed vertical machining center was optimized. Through the analysis of the fuzzy information of the components, the membership functions of the constraint were determined, and the satisfactory results were obtained according to the characteristics of the actual problems or decision-makers intention. Through fuzzy finite element method, the optimal solution in the space was adjusted, the design of multiple choices was provided for designers, and the favorable conditions for other design of parts were created.