bluuebunny/crossref_metadata_2025 huggingface dataset:
Road Performance of Concrete Incorporating Manganese Slag
Authors: Liang Duo Qiang , Qin Feng , Jiang Ji Bo
Published: December 2011

It’s of great importance to innocuity, minimization and reutilization of manganese slag generated in manganese product by electric furnace process. In the paper, ordinary Portland cement was incorporated by manganese slag, and then mechanical tests were performed to obtain the fundamental properties of the cement stabilized material in order to analyze the road performance of cement stabilized layer. The obtained experimental results showed that the manganese slag cement replaced by 2~6%( wt) manganese slag has better road performance such as mechanical properties, hydro-abrasive erosion and chemical corrosion resistance.
Improving Repeatability in Different Oxygen Probes at Low Oxygen Potentials in Molten Steel
Authors: Hu Yong Gang , Xiao Jian Zhong , Rong Li , Li Wen Hua , Qin Jian
Published: December 2011

A high quality sensor used for measuring oxygen at low oxygen concentrations is required. But the Pθof electrolyte made by different manufacturer is different from each other. We discussed the error sources and the limitation of sensing theory of electrolyte at low oxygen potentials. The Nernst function was extended through mathematical analyses, which provided a theoretical understanding to eliminate the differences among each sensor. If those extended functions were compiled into the instrument control system, the repeatability of sensors made by different manufacturers would be improved, and it only needs to replace the oxygen sensor than replacing the entire detection system after ones measurement.
Magnetic and Flotation: A Comprehensive Research for Recovery from Zinc Leach Residue
Authors: Zhang Chen Hu , Chen Jian Hua
Published: December 2011

According to the properties of the zinc leach residue, the recoveries of lead and zinc from residue have been studied in this paper. At first, ZnO.Fe2O3 was recovered by magnetic separator, and the grade of zinc concentrate is 14.89% and the recovery is 65%.Next step, zinc sulfide was recovered by flotation, and the grade of zinc concentrate is 29.65% and the recovery is 29.65%.The last, the lead residue was recovered by flotation and the grade of lead concentrate is 17.21% and the recovery is 56.37%. The technology is very effective to enrich value metals, and realize utilization of resource protecting the environment.
Study on Ultra-Fine Grinding and In Situ Modification of Taixi Super-Low-Ash Anthracite
Authors: Zhou An Ning , Wu Yan , Yang Fu Sheng
Published: December 2011

Abstract. This paper discussed the ultra-fine grinding and in-situ modification of Taixi super-low-ash anthracite in stirred mill. Particle size distribution of the products was determined by laser particle size analyzer. The surface morphology and dispersion of the powder were detected by scanning electron microscopy (SEM), and surface structure of the modified powder was measured by Fourier transformation infrared (FTIR). It was found that the optimum ultrafine grinding time is 70 min in the stirred mill, the suitable maleic anhydride (MAH) dosage was 1 wt% of the ground coal powder, MAH can play roles in grinding aid and modifier. On these conditions, both the grinding and dispersion effect are the best.
Leaching Kinetics and Seperation of Antimony and Arsenic from Arsenic Alkali Residue
Authors: Zeng Gui Sheng , Li Hui , Chen Su Hua , Tu Xin Man , Wang Wen Bin
Published: December 2011

The separation of antimony and arsenic and leaching kinetics of arsenic from arsenic alkali residue were investigated. The influencing factors such as solid/liquid ratio, stir speed, temperature and time on leaching of arsenic were studied. The results show that the leaching rate reaches 87.75% at the condition of solid/liquid ratio of 1:4 , stir speed of 600r/min ,temperature of 90°C and time of 60min. The leaching process was controlled by the surface chemical reaction and the kinetics of leaching arsenic followed the model of shrinking core. The activation energy was found to be 666.57kJ/mol. The kinetics equation was expressed as shrinking core model.
Displacement Analytic Solution of a Deep Elliptical Tunnel in Transversely Isotropic Rock Mass
Authors: Zhang Zhi Zeng , Zhang Jin Hu , Hou Dong Qi , Chen Xiao Peng
Published: December 2011

Sedimentary rocks with layered structure account for two third of global land area, and this proportion is 77.3% in China, lots of metamorphic rocks also have significant features of layered structure, so there are a large number of stability problems about layered rock mass in mining engineering. Layered rock mass is generally considered to be transversely isotropic solid in mechanics. Based on the complex variable expression of displacement components of transversely isotropy, the displacement analytical solution of a deep elliptical tunnel in transversely isotropic rock mass is derived by conformal mapping method.
Propagation Mechanism of Coal Rock Fracture under Gas Pressure
Authors: Zhao Zhi Gang , Gan Di Di
Published: December 2011

The failure of coal rock under gas pressure and in-situ stress is an inevitable stage of coal and gas outburst. The propagation mechanism of coal rock fracture under gas pressure is studied in this paper using fracture mechanics. The expression of normal stress and shear stress is given first with the simplification that the fracture is elliptical. Then the relationship among critical gas pressure, fracture direction and side pressure coefficient is studied in two branches as tension-shear failure and compression-shear failure. For tension-shear fracture, the fracture will be easy to propagate while the fracture has the same direction as maximum principal stress. For compression-shear fracture, the propagation direction is determined by the difference of compression-shear parameter and friction coefficients.
The Application of Pre-Grouting in the Construction of Vertical Shaft
Authors: Wang Xue Gui , Gao Er Xin , Sun Xian Long , Hao Zhen Yu , Zhu Rong Zheng
Published: December 2011

The paper introduces the application of surface pre-grouting in the construction of the main coalmine and the auxiliary coalmine of Xuandong No.2 coalmine.The engineering has achieved remarkable results for the grouting into more than 700 meters deep. To the characteristics of shaft deep and aquifer centralized, the practical for sealing and grouting scheme has been introduced in this paper. According to the high water pressure in the special aquifer, the special measure of increasing grouting pressure and increasing grouting quantity has been taken and which ensured the grouting effect. The paper also introduces the engineering practice of using new material, new technology in vertical shaft for reducing water yield into the shaft. So the water plugging up rate of the main and the auxiliary shaft is more than 99%. The engineering has achieved the target of high quality.
Comparison Study of the Electrochemical Behavior of Vanadate in NaOH and KOH Solutions
Authors: Liu Biao , Zheng Shi Li , Liu Hui Bin , Du Hao , Wang Shao Na , Chen Dong Hui , Bai Rui Guo
Published: December 2011

The redox behavior of vanadate ions at glassy carbon electrode in KOH solutions with concentration ranging from 0.1M to 1M had been studied using cyclic voltammetry method. It is found out that vanadate ions experience similar redox reactions in both NaOH and KOH solutions, which involve a single cathodic reduction and two oxidation reactions in one cyclic sweep. Nearly same currents are obtained under the same reaction conditions in both solutions. However, vanadate ions appear more difficult to be reduced in KOH solutions than in NaOH solutions, and the reduction reaction exhibits higher irreversibility. The reduction potential is influenced by vanadate ions concentration, and is more negative in KOH solutions. The reversibility of reduction reaction is greatly dependent on alkalinity, and the reduction potential obviously decreases with the increase of alkalinity in KOH solutions. However, only a slight decrease was observed in NaOH solution, which may be due to the fact that OH-exhibits higher activity in KOH solutions.
Improvement of Evaluation Methods for Deep Fluid Diverting Agents
Authors: Liu Yi Fei , Fang Xiao Dan
Published: December 2011

The main oil fields in China have gone gradually into the high or extra-high water cut production period, and conventional profile control technologies already cannot meet oilfields’ production requirements. The research and application of new fluid diverting technologies has got many new progresses, but their validity term is relatively short in the aspect of improving the high water cut oil reservoir. Based on the capillary bundle model, a comprehensive performance evaluation method of fluid diverting agents has been proposed, through systematical analysis of the fluid diverting agents evaluation methods at home and abroad and their existing problems, and all-sided understanding of the present reservoir situation. The experimental results showed that this method could effectively and comprehensively evaluate the fluid diverting agents’ diverting effect, shear resistance performance, temperature resistance performance and salt resistance performance, and could optimize injection process parameters. It has the important and practical significance to improve the duty validity of the fluid diverting agents.
The Settlement Prediction and Mining Suggestions of Zhaofeng Gob Area
Authors: Dai Shu Lin , Zhang Zhu Lin , Lü Xiang Quan
Published: December 2011

The exploitation of mining area is usually accompanied with surface subsistence, which may threaten the structure belonging to this area. So it is indispensable to evaluate the consequence and predict a relatively precise sedimentation value before the excavation. In this paper, theoretical calculation and numerical simulation are used to estimate the subsistence of Zhaofeng gob area, Jilin province in China. Comparing with the conclusions of two methods, the maximum sedimentation value and its position are given, which will contribute to the establishment of the restoration schemes in this area.
Virtual Simulation of Ground Scene of the Mining Area
Authors: Han Yong Shun , Dong Shao Kun , Han Jun , Zeng Si Mei
Published: December 2011

Mining has a nearly relation with the development of our country and people’s life, in order to improve the informationization of the mining, in this study, realize modeling the objects of the mining by dividing them into four parts, point, line, surface and body models, according to the characteristics of the ground environment and the types of the entities in the mining area. Then, study the methods and realize the modeling and visualization of the ground scene of the mining area by using the technology, ArcEngine, ADO and three-dimensional model. By verifying, this method has better simulation results.
Complex Activation of Coal Gangue to Al Compounds
Authors: Liu Shu Hong , Lan Xi Jie , Gao Hong
Published: December 2011

The coal gangue was activated by calcine activation, calcine activation + mechanical activation (MA) complex activation. From the results of O2-TPO-MS and Ar-TPR-MS, we can speculate the reactions occurred during the coal gangue calcine activation processing. Effects of calcine temperature, calcine activation + MA complex activation, kinds of acid on the extraction percent of Al were investigated. The results of the extraction percent of Al and particle size analysis show that calcine (400~600 oC) activation and calcine (400~600 oC) + MA complex activation can enhance the extraction percent of Al and decrease the particle size. Much higher extraction percent of Al can be obtained with H2SO4 as acid medium than with HCl as acid medium for the coal gangue activated with the same condition.
Study on Double-Frequency Composed Vibrating Compaction Method Based on Resonance and Antifriction Principle
Authors: Yao Yun Shi , Feng Zhong Xu , Li Yan Wei , Shi Xin
Published: December 2011

For improving compaction process, a method of double-frequency composed vibrating compaction was proposed, which based on resonance and antifriction principle. The method was different from the traditional variable-frequency and variable-amplitude compaction method, which has one frequency and associated amplitude. Double-frequency composed vibrating compaction method has two different frequencies and associated amplitudes simultaneously, thus enhanced resonance and antifriction of asphalt mixture, and large amplitude oscillation was prone to deep transmission of impact energy. The results showed that double-frequency composed vibrating compaction machine got higher degree of compaction than that of traditional machine with same tonnage, 2.6% higher in surface layer and 3.1% higher at the position 15 cm far from surface. Double-frequency composed vibrating compaction method was better than traditional method in concerned with the compactness in layers, and had obviously advantage of deep compaction.
Electrochemical Measurements of Corrosion Inhibition of Mild Steel in Sulfuric Acid by BIMGCS12-3
Authors: Sun Yong Ming , Chen Hong Ling
Published: December 2011

Gemini benzimidazole cationic surfactant, propanediyl-α, ω-bis-(N-dodecyl benzimidazole ammonium bromide), referred as BIMGCS12-3, was synthesized from the raw materials of benzimidazole, dodecane bromide and dibromopropane. The structure of the target compound was confirmed by HNMR and elemental analysis. Electrochemical behaviors of BIMGCS12-3 for protecting mild steel from sulfuric acid corrosion were issued. Changes in impedance parameters (charge transfer resistance, Rct, and double layer capacitance, Cdl) were indicative of the feasibility of BIMGCS12-3 as excellent mild steel corrosion inhibitor in sulfuric acid.
A New Nodal Analysis Method of Artificial Lifting System
Authors: Zhao Rui Dong , Xiong Chun Ming , Tao Zhen , Zhang Jian Jun , Su Lei , Lin Chun Qing , Liu Hua Yong
Published: December 2011

Nodal analysis, defined as a systems approach to the optimization of oil and gas wells, is used to evaluate thoroughly a complete producing system. For the systematicness easily ignored during the design of artificial lifting system, based on coordination principle of reservoir, wellbore and lifting equipment, the concept of well performance curves are proposed. With the well performance curves, a new nodal analysis method of artificial lifting system is obtained, which is more efficient. Upstream and downstream pressure of pump and pressure difference provided by pump are displayed in well performance curve, which reflects the property of the well itself. Through further research of well performance curve, the energy of well itself will be fully developed, system effectiveness will be raised, and energy consumption will be reduced.
Study on Hazard Effects of Gas Explosion in Coal Laneways
Authors: Pang Lei , Wang Tong , Xie Yu Shu , Yao Wei , Zhang Qi
Published: December 2011

Methane-air explosion is one of the main accidents in coal mines. In this paper, the hazard effects of the gas explosion in a long straight coal laneway were studied by virtue of numerical simulation. Distribution characteristics of the shock wave overpressure, the flame speed and the temperature field were obtained. Along the increasing axial distance, shock wave overpressure increases in original methane-air area and decreases beyond the original methane-air area. Range of flame exceeds original methane-air area. Flame accelerates continually in original methane-air area and decelerates beyond the original methane-air area. The temperature attenuates slowly along the increasing distance in the flame area by virtue of flame front, and attenuates quickly along the increasing distance beyond the flame region. High temperature hazard involves farther area beyond original methane-air area.
Distributed Communication Decision Tree Algorithm for Disseminated and Heterogeneous Environment
Authors: Chandra Chandra , Ajitha P.
Published: December 2011

Current Classification algorithms require large amounts of data to be stored enduringly in the memory for long assortment and amount of time. Diverse classification techniques had been already proposed in the literature for both in the run of the mill environment and distributed environment. Mining of decision trees in the distributed environment can be able to handle the large amount of data but with high communication cost. A new distributed communication decision tree algorithm is proposed here which reduces the communication cost for the transmission of the data in the distributed and heterogeneous environment.
HMM Based Enhanced Security System for ATM Payments
Authors: Jog Vivek V. , Chouhan M.J. , Mangla Akhil
Published: December 2011

Due to a rapid advancement in the electronic commerce technology, the use of ATM cards has dramatically increased. As ATM card becomes the most popular mode of payment for both online as well as regular purchase, cases of fraud associated with it are also rising. In this paper, we model the sequence of operations in ATM card transaction processing using a Hidden Markov Model as well as Bluetooth based mobile security model (HMM) and show how it can be used for the detection of frauds. To determine the parameters of a HMM it is first necessary to make a rough guess at what they might be. Once this is done, more accurate (in the maximum likelihood sense) parameters can be found by applying the so-called Baum-Welch re-estimation formulae..
BER Performance Improvement in Coded-OFDM Systems Using Equalization Algorithms
Authors: Gupta Bhasker , Saini Davinder S.
Published: December 2011

Intersymbol interference is a major cause to limit high data rate transmission in wireless communication. To avoid ISI OFDM is the preferred modulation technique. For frequency selective channels pure OFDM may not be sufficient to eliminate ISI. The use of time coding (interleaver and convolution coder) improves the ISI affected reception but do not eliminate ISI completely. The paper investigates the presence of equalizers to improve BER performance in ISI affected reception. The performance improvement is observed for two novel equalizers namely zero forcing equalizers and MMSE equalizers. Simulation results are presented to demonstrate the superiority of the CODED OFDM method with equalizers
Performance Analysis of OFDM Based DAB Systems Using Concatenated Coding Technique
Authors: Agarwal Arun , Patra S.K.
Published: December 2011

Radio broadcasting technology in this era of compact disc is expected to deliver high quality audio programmes in mobile environment. The Eureka-147 Digital Audio Broadcasting (DAB) system with coded OFDM technology accomplish this demand by making receivers highly robust against effects of multipath fading environment. In this paper, we have analyzed the performance of DAB system conforming to the parameters established by the ETSI (EN 300 401) using time and frequency interleaving, concatenated Bose-Chaudhuri-Hocquenghem coding and convolutional coding method in different transmission channels. The results show that concatenated channel coding improves the system performance compared to convolutional coding.
Electronic Transport Properties of Single-Walled Zigzag Silicon Carbide Nanotubes with Antisite Defects
Authors: Song Jiu Xu , Liu Hong Xia
Published: December 2011

The electronic transport properties are the basis for investigations on silicon carbide nanotube (SiCNT), which are suitable to develop novel nanometer electronic devices. The electronic transport properties of Single-Walled (8, 0) SiCNTs with antisite defects are investigated with the method combined Non-Equilibrium Green’s function with density functional theory. Results show that the similarity on electronic transport properties of the nanotube with different defects is high. Under a bias value greater than 1.0 V, a nearly exponential relationship between the bias and the current is achieved, which originates from more orbital participating in its transport properties caused by the increase of the bias.
Effect of Size on the Mechanical Properties of Rh-20at%Pd Nanowire
Authors: Davoodi Jamal , Moradi Mohammad Javad
Published: December 2011

The aim of this research was to calculate Yong modulus, Bulk modulus and the elastic constants of Rh-20at%Pd (atom percent) nanowire. The molecular dynamics simulation technique was used to calculate the mechanical properties at constant temperature, constant pressure ensemble. The cohesive energy of the model nanowire systems was calculated by Quantum Sutton-Chen many body potential. The temperature and the pressure of the system were controlled by Nose-Hoover thermostat and Berendsen barostat, respectivly. In addition effects of the diameter of nanowire on the mechanical properties were studied. The obtained results show that, when the diameter of Rh-Pd nanowire increase, elastic constants, bulk modulus and Young modulus all increase, and when the diameter reaches about 5.5 nm, the properties began to level off and remain constant.
Layer-by-Layer Nanoparticles ZnO Thin Films Prepared by Sol-Gel Method
Authors: Shariffudin Shafinaz Sobihana , Herman Sukreen Hana , Rusop Mohamad
Published: December 2011

Nanoparticles ZnO thin films have been deposited using sol-gel spin coating technique. A 0.4M sol of ZnO had been prepared by dissolving zinc acetate dihydrate in monoethanolamine (MEA), and 2-methoxyethanol as a stabilizer. Thin films are then spin coated onto quartz substrate with rotation speed of 3000rpm. After each layer, the samples were heated at 150 oC and annealed at 550 oC; which are defined as layer-by-layer process. The aim of this paper is to study the effect of annealing time to the structural, electrical and optical properties of the films. XRD result shows highest peak observed from sample annealed for 1 hour at (102) and (002) orientation. Calculation shows that the film annealed for 1 hour gives lower resistivity at 92.29Ω.cm which is due to the oxygen adsorption and good crystalline quality. Photoluminescence measurements exhibit UV emission centred at 380 nm and yellow-orange emission centred at 580 nm. Optical transmittance of the films show transparency above 70% for sample annealed for 30 minutes.
IP Flow Data Correlation with Inference Rules
Authors: Jiang Ci Bin , Li Jung Shian
Published: December 2011

In recent years, IP flow identification in botnet detection attracts attentions in network security. IP flows associated with bot masters can be used to trace the botnet source. Most botnets suffer a large of IP-based attacks. This paper attempts to explore the correlations between attack behaviors and IP flows. By data collection, sets of functions concerning inference rules and conversion of data format, this paper successfully identifies the botnet attacks by IP flows and the inference patterns. The IP flow-based intrusion detection can efficiently find alert data correlation.
Design of Wireless Temperature and Humidity Sensor Based on NRF24L01
Authors: Chen Wen Gang , Zhang Xue , Liu Bao Hu
Published: December 2011

According to the development of the Internet of things, a wireless cognitive transducer based on humidity-sensitive capacitor was designed. The ambient temperature and humidity are measured by temperature &humidity transducer which transfers the capacity into frequency signal with the help of RC oscillation, followed by the frequency with MSP430 SCM and the humidity accordingly. Thermal sensitive resister of the negative temperature system is used to measure the temperature. When measuring, the humidity can be compensated by temperature data, thus ensuring higher precision and stability of humidity measuring. The measured data are sent out by NRF24L01 through communication protocol to accomplish distant data collection of temperature and humidity, which foretells a bright prospect.
A New SVM Considering the Sample Distribution
Authors: Zhou Hao , Sun Jin Ping
Published: December 2011

As the continuation of former work, a new SVM is discussed. It is similar to the Fisher Discriminant Analysis (FDA) that the normal vector of SVM separating hyperplane is a one-dimension vector in the high-dimension hidden space, which can be used as a projection orientation to classify data. So, after the SVM training, the projection of samples can be calculated by kernel function. Finally, the threshold of the classifier is ascertained according to the distribution of projection. With the sample distribution considered, SVM performance is improved. Simulation manifests the validity of the method in this paper.
Thinking of Network Theft Accomplished
Authors: Wang Chun Lin
Published: December 2011

The network theft is a common cyber crime. As a new type of theft, theft of their means of theft of objects, and other aspects of its specificity, the state is no longer the traditional theft accomplished consummated theft of state for the network, or give cyber criminals a lot of loopholes in the law, which will indulge all Internet criminals indulging in all kinds of loopholes in the law of theft in violation of the purpose of criminal legislation, which will not benefit social harmony. Completion of the finds on the network by stealing from the account that is more reasonable, more conducive to the kinds of criminal punishment.
The Development and Design of Network Laboratory Operation Information Management System Based on J2EE
Authors: Fang Yu Chu
Published: December 2011

Using of advanced information technology to make scientific analysis and guidance to operation is serves as an effective means to enhance laboratory manage level. Object-oriented technology and modular design methods, application MVC design and software engineering methods to achieve network laboratory operation management information system based on J2EE and B/S model, gives a complete set of solutions and systems implementation. The operation of the system to improve the quality of education, expanding the scope of services is conducive to sharing resources, improve work efficiency to play a good role, has some practical value and spread value.
Application and Research of the Hospital Medical Dispute Management Information System Based on SOA
Authors: Fang Yu Chu
Published: December 2011

The computer has become our right-hand man to study and work, is applied to all spheres of society, with the actual situation of hospital medical dispute. In this paper, it proposed that according to study the processing of the application information system which based on the structure of SOA component model and B/S model for hospitals in medical disputes. This was set up medical complaint as a main line, which can devise four layers of structure of the model with the medical disputes, they were including medical complaint handling system, medical disputes handling system, medical protocol handling system and medical dossier handling system, they can used actually in the hospital management. The management information system can be found in medical disputes and solve existing problems handle medical disputes and achieved good effect.
Path Planning for Mobile Robots in 3D Dynamic Environments
Authors: Chen Li Jia , Jin He , Bai Jin Ke , Mao Hai Tao
Published: December 2011

Aiming at the robustness of the path planning of mobile robots in the 3D dynamic environment, an improved ARF (Artificial Potential Field) based path planning algorithm is proposed in this paper. Supposing that all the obstacles move regularly and the robot is on uniform motion in a grid 3D environment. Firstly, the algorithm computes the future statuses of the environment, such as the coordinate of all the obstacles and the goal, until a time step T in which there is at least one route between the start and goal. T is obtained by BFS (Breadth First Search) and environment configuration parameters. Secondly, because in every time step the environment can be consider as being static, ARF is used to determine the potential value of every space position in each time step. Finally, a route along the lowest potential values is found for the robot from the start to goal. Simulation results show that the algorithm makes the robot avoid obstacles effectively and reach the goal safely.
Research on In-Flight Shutdown Fault Diagnosis of Civil Aviation Engine Based on Bayesian Networks
Authors: Cao Hui Ling , Xue Peng , Yang Xiao Jun , Tu Xun Lai
Published: December 2011

In-flight shutdown (IFSD) of civil aviation engine can result in catastrophic accident and has been attracting more and more attention. This paper presents a new solution, which based on Bayesian Networks, to diagnose IFSD. Fleet data of china occurred in last twelve years was used to establish the network with four layers. After designating the conditional probability between two nodes which were located on the adjacent layers, it can be obtained that to what extent one factor can lead to IFSD. At last, the verification was given to prove that this solution is useful to diagnose IFSD.
An Energy-Balanced Probability Coverage Algorithm for WSN
Authors: Su Yu Xiong , Wang Dong
Published: December 2011

The sensing capabilities of sensor nodes are affected by various factors in the actual environment, and the ideal disk sensing model is not available in the practical sensor network. In this paper, we proposed an Energy-balance Coverage Algorithm based on Probability (ECAP). The algorithm applies to a limited target point monitoring issues, using the heuristic greedy strategy. The nodes that have a larger detecting probability and higher energy are selected to construct a coverage set. It improves energy efficiency, and extends the lifetime of sensor networks. Experiments also show that the algorithm has high stability.
Research of Node Localization Algorithm Based on DV-HOP in Wireless Sensor Networks
Authors: Wang Hong Bin
Published: December 2011

Node self-positioning is one of the core technologies in wireless sensor networks and is the premise of many applications. It is significant to achieve highly efficient and reliable node localization for event observation, target tracking and efficient routing. The DV-Hop localization algorithm which is one of the Range-Free algorithms is researched deeply. Firstly, algorithmic process, error sources, and the amount of communication and computing for Traditional DV-Hop algorithm are analyzed. For low positioning accuracy in Conventional DV-Hop localization algorithm, an improved DV-Hop localization algorithm based on estimate of average hop distance, Min-Max and position correction is brought forward. The simulation results show that the improved algorithm can improve the positioning accuracy more effectively without increasing hardware consumption in nodes comparing with conventional DV-Hop algorithm. So it is a practical and effective node localization method in wireless sensor networks.
Analysis on Convenience of Beijing Urban Subway Transfer Stations Based on GIS
Authors: Chen Jing
Published: December 2011

Transferring plays an important role between different lines of urban rail transport and routine public transit. The convenience of a transfer station not only directly affects the efficiency of the whole traffic network, but also is a key factor that influences travel convenience. Based on GIS, through the study of the convenience at the 16 subway transfer stations in Beijing, the article tries to find the relationship of the evaluations on the transferring between metro-metro and metro-bus. Finally, by further clustering analysis on the spatial distributions of the transferring evaluations, this article reveals the existing problems of the layout of transfer stations and proposes several effective suggestions and countermeasures for them.
Research on Intrusion Detection Method Based on Neural Network
Authors: Xu Chi , Chen Jin
Published: December 2011

This paper describes in Using Self-Organizing Map (SOM) neural networks and its auto-clustering ability to study intrusion detection. The feature pattern of each SOM unit is constructed using PCA feature extraction method and a simplified PCASOM model is proposed. An online learning algorithm is also given and its properties are analyzed. And then the simulation result was given.
Joint Characteristics and their Function as the Indicates of the Principle Stress Orientations in the Majiang Area, Guizhou Province, China
Authors: Dong Li , Lu Xue Mei
Published: December 2011

Joints developed in rock mass have been considered as the living evidence of surface rocks being reshaped and reformed by multi-stages of tectonic evolution and stress fields. And they have been frequently used as indicators of the principle stress orientations in the reconstruction of stress fields and evolution(transition) processes. The paleo-reservoir of hydrocarbon in the Majiang area, Guizhou Province, is one of the largest paleo-reservoirs developed in residual units of marine strata in southern China. The area was shaped by multiple stages of tectonic movements and therefore experienced complicated tectonic evolution processes. As a result, numerous joints were developed in the strata of the area and offer a great opportunity for a profound study of the relationship between jointing characteristics and tectonic stress fields. Field measurements of joint sets were therefore performed to provide data for a statistical analysis on characteristics, occurrence, and geometries of the joints in the area. Based on a combination of the regional geological setting with an observation of joint intersection patterns and cutting relations between joints and faults, we suggest that there are five groups (stages) of joints developed in the area. They are, according to the age sequence of the strata (from old to young), the early conjugate shear joints of X intersections with NEE-SE orientation, the early conjugate shear joints of X intersections with SEE-NEE orientation, the overthrusting longitudinal joints of NE orientation, the open joints of SSE orientation and the shear joints of nearly EW orientation. They are the products of the Duyun Movement, early Guangxi Movement, Indo-China Movement, and Yanshang Movement respectively. The tectonic stress field of each stage is reconstructed through inversion based on data of joint occurrence. The calculation shows that the principle stresses of the stress fields in the Majiang area had shifted clockwisely from SEE to SE, SSE, and finally EW.
Automatic Monitoring System on Embedded Platform for Environmental Noise Detection
Authors: Wang Yi Xiao , Li Ya Nan , Wang Yi , Chen Xiao Dong , Yu Dao Yin
Published: December 2011

A novel system based on embedded platform for environmental noise monitoring is presented in this paper. The system is designed by ARM and DSP to implement data collection and processing respectively, as a substitute for conventional MCU and DSP structure. The DSP is used as the core processor to implement a high precision IIR filter for 1/3 octave band spectral analysis in real time. The noise data detected beyond the reference value can be processed and stored automatically, and the noise pollution sources can be identified in time by the images captured by an USB camera on the terminal. Then the data and images acquired by the system will be transmitted to the sever computer through GPRS , and the users can obtain the real time noise data and pollution sources images when they explore the website of noise monitoring center. All the properties of 1/3 octave filters can meet the International Electrotechnical Commission Standard IEC61260-2001 class I. The system has the capability of high accuracy and stable performance at all time compared with the conventional system, indicating that it has great significance to the control of a city’s noise pollution condition.
Land Use and Land Cover Change Based on Remote Sensing and GIS in Changping, Beijing, China and Lake Velence Watershed, Hungary
Authors: Chen Gai Ying , Guo Da Zhi , Wojtaszek Malgorzata Verőné , Márkus Béla
Published: December 2011

Because of the rapid economy development and the enormous society evolution, large scale changes of land use and land cover had occurred in areas of Beijing and Hungary in the past two decades. This paper focused on monitoring on LUCC(land use and land cover change) in Changping，Beijing, China and Lake Velence watershed area in Szekesfehervar, Hungary based on Multi-Temporal, Multi-Spatial and multi-source remotely sensed images and Geographic Information System( GIS).
Research and Realization of Key Algorithm of ADS-B Overlapping Test
Authors: Yang Yu , Zhang Chao
Published: December 2011

How to recognize the ADS-B messages is the key point of ADS-B receiver, and the preamble is the unique character of ADS-B messages. This paper describes a method for the overlapping test of the preamble detection. The FPGA implementation scheme is given in detail and the verilog HDL codes of this design is accomplished. The simulation result indicates that this method is viable and can detect the overlapping rapidly and accurately.
A Unified Iteration Method with Error for Inclution Problem
Authors: Chen Han Jun , Xue Yang , Zhao Hong
Published: December 2011

In this paper, we suggest and analyze a unified iteration method with error for finding the common element of the set of fixed points of nonexpansive mappings and the set of the solutions of the inclusion problem using the resolvent operator technique. We also study the convergence criteria of the unified iteration method with error under some mild conditions. Our results include the previous results as special cases and may be considered as an improvement the previously known results.
Study of Risk Control of ERP Project Based on ERM
Authors: Zhang Yue Sheng
Published: December 2011

The promotion of ERP project brings some new blood to enterprises, but the high-risk of its implementation can also discourage many enterprises. The effective prevention and control of its implementary risks is one of the important issues in present-day enterprise information management. In view of the successful application of ERM theory in the enterprise risk management in recent years, it may also be applied in the risk control of the ERP project. The implementation of the ERP project can be divided into three stages, that is, preparation, implementation, application, and a number of risk control points. Meanwhile, the risk control system of stage-management and point-control should be established.
The Measures to Narrow the Information Gap by Information Justice
Authors: Zhang Yue Sheng
Published: December 2011

The information divide is the centralized manifestation of information unfair in modern enterprises. Enterprises in our country mainly face the unfair phenomenon which concludes the opportunity of information acquisition, the right to control information and the unfair of information resource disposition and so on .The realization of information fairness and reducing the enterprise information divide are the important measures. The information fair realization needs not only the enterprise unceasingly to promote the ability of information but also the government to provide a series of fair measures.
Image Segmentation Research Based on Genetic Algorithm
Authors: Guan Xiao Wei , Zhu Xia
Published: December 2011

As one of the difficulties and hot of computer vision and image processing, Image segmentation is highly valued by the research workers. Yet there is no image segmentation algorithm which is generic, and it is difficult to obtain an optimal feature representation method. In this paper, genetic algorithm (GA) has proposed to segment the image. GA algorithm can improve the efficiency and quality of the picture some extent through the experimental results. The algorithm has some versatility, as long as the corresponding parameters are adjusted, it can also handle the other images. The results show that GA algorithm is very stable, and the fusion result is more satisfactory. Thus, GA can be applied in image segmentation and this algorithm will have good prospects in image processing.
Study on College Mathematics Education and Teaching Strategies
Authors: Liu Xiu Hong
Published: December 2011

In order to improve the quality of college mathematic education, cultivating rational thinking of people, and improving the quality of nation, this paper make a comprehensive and systematic survey and analysis on college mathematic education. Results show that the team-constructer and quality of students in university have been changed, and it is not optimistic for mathematic learning of students. For the above problems, it is important and necessary to adjust the teaching content, improving teaching methods and means, promoting the cultural ideas and history of mathematics, and show humanistic concern to students.
Optimization of Monitoring Network Point about Total N in Soil in Hangjiahu Plain
Authors: Li Qiong , Hao Chun Ming , Zhao Long Hui , Liu Hui Lin
Published: December 2011

In this paper, Monitoring network point about total content of Nitrogen in surface soil was studied on optimization in Hangjiahu plain, based on the geostatistics, variance and linear correlation. And Background of Total N in soil were compared before and after network point optimization. The result showed that sampling density may improve from 1 point/4km2 to 1 point/64km2. this monitoring result of Total N only can reflect spatial distribution of Nitrogen, but can not reveal its actual circumstance. Detailed investigation of the lowest scale must be done if the distribution of Nitrogen in surface Soil wanted to be understood comprehensively. Zhejiang Province had firstly completed multi-purpose geochemical survey for 1:250000 from 2002 to 2005 [1]. Total N content in surface soil was the central task of the survey because high nitrogen content in soil fertility was not only the characteristics of the land but also one of the reasons of non-point source pollution. In order to grasp the overall trend of geochemical in Hangjiahu plain and timely discover the changes about environment quality of soil total N elements, a multi-level environmental geochemistry monitoring network must be promptly established[2]. But it’s a problem needed to be solved immediately by the geological, environmental and agricultural scientists that how to meet the needs of the accuracy of the premise, with a minimum of sampling points to design the best program of distribution, thereby saving time and cost of sampling. At present, most people used properties of soil spatial variability and spatial analysis methods to solve this problem [3].
Series Limit Calculation in Teaching Software of Advanced Mathematics
Authors: Han Yan
Published: December 2011

In this paper, we introduce the mathematics teaching software, in which we mainly focus on the series limit. More specifically, we comment on the clarification ofthe series limit, and the common formula for a variety of limit as well as the common process. This mathematics teaching software can give intermediate result which others can not present, but also provide an intermediate process. Most importantly, it can solve the unsolved problem which other software can not.
Research on Erosion Mechanical Parameters of Wind-Sand Environmentin the Central and Western Region of Inner Mongolia
Authors: Hao Yun Hong , He Pei Yuan , Wu An Li
Published: December 2011

The central and western region of Inner Mongolia is a high activity area of sandstorm in northern China, the infrastructures in this region have been long-time eroded by wind-sand environment, those durability and safety have been seriously affected. This paper analyzed the meteorological standards and geographical distribution characteristics of wind-sand environment, studied erosion mechanical parameters of wind-sand environment in the central and western region of Inner Mongolia. The results will provide the basis for protecting engineering materials and structures not to erode by wind-sand environment.
Design of a LTCC Low Pass Filter
Authors: Ma Yan Bing , Zhang Huai Wu , Ling Wei Wei , He Ying
Published: December 2011

In this paper, the main work is focused on the design, simulation and fabrication of 2012-type low pass filter(LPF) using the technology of low temperature co-fired ceramic(LTCC). The three-order and -type LPF with 130MHz cut-off frequency and 260MHz out-band rejection is successfully implemented using two kinds of green tape with relative permittivity of 14 and relative permeability of 60 respectively. The measured results agree well with the simulated data and the design process is proved to be effective and reasonable.
Wireless Monitoring System for Drilling Engineering Based on LabVIEW
Authors: Zhang Dao De , Xu Wan , Xu Cheng
Published: December 2011

The system is a wireless monitoring system for drilling engineering. It is based on LabVIEW and NI WSN. Compared with the conventional drilling monitoring system, WSN has many advantages such as easy to deploy and structure is flexible. Aiming at the NI wireless nodes, the paper introduces the process of network configurations. The modular design is adopted to realize system demo, data acquisition, data query and data alarming. The system is compact in structure and the experiment shows that the system works in the stable condition.
Study on License Plate Recognition System based on Hybrid Programming of VC++ and MATLAB
Authors: Liu Lei , Wei Qiang , Song Xiao Ling
Published: December 2011

Application of License plate recognition system(LPR) in intelligent transportation is discussed in this paper, and various practical recognition algorithm is analyzed. VC++ with a good interface of MPC's and the Matlab which have powerful and fast graphics image processing functions are introduced. A novel method combining the VC++ and Matlab is designed to complete the recognition of License Plate Recognition. Some experiments are made to validate the effectiveness of the proposed method. The results show that the real time of the algorithm is enhanced. The mean processing period of a plate is reduced from 7s in VC algorithm to 0.37s with the proposed method.
Research on the Coupling Coordinative Degree of Transportation and Regional Economy in China
Authors: Zhang Jian Sheng , Tan Wei
Published: December 2011

This paper based on the coordinated development mechanism of transportation and regional economy, and constructed and calculated the coupling coordinated model of transportation and economic development with the data of 31 provinces. The results are in the following: First, the construction of transport infrastructure is overall better, but the regional difference is quite big, the eastern region is better and mid-western regions are backwardness; Second, from the coordinated degree of transport and economic development, the eastern region is obviously advantage over the mid-western regions.
Introduction of FECs and its Applications on Internet & Wireless Communications
Authors: Ma Yan , Ma Chun Lan
Published: December 2011

This article focuses on FECs which is an error correction coding method and its applications in Internet and wireless communications. First, this article begins with the principles and the types of FECs. Then some typical applications n Internet and Wireless communications for each type of FECs are outlined. The next step is a comparison of the advantages and disadvantages between different types of FECs.
The Application of AJAX Technology on WebGIS
Authors: Liu Xiao Dong , Ma Qiang , Zhu Yi
Published: December 2011

AJAX is a new technology, which was published by Java community in 2005, and immediately cried up by programmers. AJAX integrates many matured techniques. The characters are synchronous dealing with UI element in client side, asynchronous sending message to server, accepting data, then only updating the elements which need to be updated, no need to update the whole page. This new mechanism enhances B/S efficiency greatly. The author has applied AJAX to WebGIS project and the effect is great. This paper introduces work theory of AJAX and technique rout to apply it to WebGIS.