bluuebunny/crossref_metadata_2025 huggingface dataset:
Molecular Identification of a Strain Acidithiobacillus Ferrooxidans and its Biological Characteristics
Authors: Deng Cheng Xun , Yue Mei , Wang Ling , Li Yu Hui
Published: December 2011

A strain of Acidithiobacillus ferrooxidans designated S t1 was isolated and identified from the acid mine drainage of Tianmashan Coal Mine, Tongling county, Anhui province. Its morphological, physiological and biochemical characters, growth conditions of pH value and temperature, 16S rDNA sequence and the phylogenetic tree was studied. Results showed that the bacteria strains from different sites have divergence at the curve of pH and Eh values during the enriching culture. The isolated strain S t1 grew in a pH rang from 2.0 to 3.0 and temperature 25 to 35°C with over 98％similarity toAcidithiobacillus ferrooxidansin 16S rDNA sequence.
Effect of Polymer Surfactants on the Inhibition of Beta-Dicalcium Silicate Decomposition in Sodium Aluminate Solution
Authors: Pan Xiao Lin , Yu Hai Yan , Wang Bo , Ding Ting Ting , Tian Yong Pan , Su Hang , Bi Shi Wen
Published: December 2011

The decomposition behavior of synthetic β-2CaO•SiO2 by adding sodium polyacrylate (NaPAA), polyethylene glycol (PEG) and their mixture at 80°C in sodium aluminate solution was investigated. The SiO2 concentration in the reacted sodium aluminate solution decreases as the polymer surfactant charge increases, but does not change obviously when each surfactant is added over 12.5 mg/L. The amount of CaCO3, hydro-garnet and sodium aluminum silicate hydrate in the decomposed solid with polymer surfactant addition is much smaller than that without surfactant addition. The losses of Na2O and Al2O3 are greatly decreased due to polymer surfactant addition. The inhibition sequence of β-2CaO•SiO2 decomposition by polymer surfactants in sodium aluminate solution is mixture of NaPAA and PEG, NaPAA, PEG.
Thermodynamics of Pb(II) Complex Equilibrium in Pb(II)-NH3-NH4CI-H2O System
Authors: Wang Rui Xiang , Tang Mo Tang , He Jing , Yang Sheng Hai
Published: December 2011

Thermodynamics of Pb(II) complex equilibrium in Pb(II)-NH3-NH4Cl-H2O system were studied using the double equilibrium method. Varying the concentration of ammonia and ammonium chloride, respectively, in range of 0~5mol/L, the equilibrium concentration of all the species in the system are calculated, and thermodynamic diagram are plotted. The dissolution laws of Pb(II) in the system are revealed and the high dissolution fields of Pb(II) are found. The solubility of lead increase with the ammonium chloride concentration increasing, and the highest solubility reaches 0.29mol/L, whereas the concentration of lead always remains 0 in pure ammonia solution. Add ammonium chloride to the solution and maintain its concentration constant, the concentration of lead decreases with ammonia concentration increasing.
Optimal Design of Heating System for Annular Furnace
Authors: Yuan Yin Mei , Li Chao Xiang
Published: December 2011

According to the present problems of annular furnace, using the furnace black box, the temperature distribution of billet in the heating process is measured. Based on the results, the existing heating system is found deficient. Therefore, make improvements to the heating system, and mainly increase the heat load. Heating process tracking test is carried out again. Achieve the desired outcome, such as temperature uniformity, better quality, shorten time,etc.
Effect Evaluation of Inhibitor to Barium Sulfate and Strontium Sulfate
Authors: Chen Chuang Qian , Li Kan She , Kang Jie , Yu Chun Xia , Liu Jing
Published: December 2011

Facing at the situation that a large amount of BaSO4/SrSO4, which seriously impacts on oil production operation scale, has been yielded during oilfield production, three kinds of scale inhibitor (TS-09, TH-60 and PBTCA) were collected from oilfield for comprehensive evaluation. The results show that the three kinds of scale inhibitor have certain scale inhibition effect to BaSO4/SrSO4, and the influence of different water quality is obvious. When TH-60 concentration was 100 mg/L, its inhibition rate to BaSO4 has reached 95%. In comparison, scale inhibition effect of TH-60 to BaSO4/SrSO4 is better than the others. TH-60 is more suitable for Huaqing oilfield than TS-09 and PBTCA, concentrations range in 100-180 mg/L especially.
The Coupled Heat and Mass Transfers in the Endothermic Chemical Reaction Packed Beds
Authors: Li Ming Chun , Wu Yu Sheng , Song Ying Tao
Published: December 2011

According to the assumption of local thermal non-equilibrium and the heat transfer controlled regime, a mathematical model describing the coupling between the heat and mass transfer processes in a porous packed bed with endothermic chemical reactions was established and solved by the alternate dimension implicit method. The calculated results showed that, the profiles of the temperature distributions of the two phases and the solid conversion ratio all decay near the radial boundary wall corresponding to the momentum boundary layer. However, the concentration of the product gas increases near the wall owing to the slower speed layer. The temperatures difference between the gas flow and solid pellets can not be ignored during the study of ore decomposition in the porous packed bed. The reaction features of the packed bed with endothermic reactions under different conditions can be analyzed by the established model.
The Research on Novel Technics for Fluorite Ore Containing Carbonate Minerals
Authors: Cao Zhan Fang , Zhong Hong , Jiang Tao , Li Li Qing , Wang Shuai , Liu Guang Yi
Published: December 2011

The ore is a kind of mixed ore mainly with fluorite, which contains quartz, calcite, feldspar and sericite, belong to silicate-fluorite-calcite type ore. The content of calcite in the fluorite ore of Suichang is 5.4%. According to the characteristic of mineral, flotation tests have been done to separate fluorite. The test results show that it is difficult to separate fluorite from suichang's ore because of similar floatability of fluorite and calcite. This experiment mainly studied the joint technics on floatation and leaching. The results indicate that fluorite grade of 90.93% and recyle rate of 85.26% could be gained by KY-108 as a collector, sodium silicate and sodium humate as depressant. High grade fluorite concentrate which contains CaF2 over 97.81 %，SiO2 and CaCO3 less than 1.5% can be acquired by using leaching process, and the overall recovery of CaF2 in floatation and leaching is over 85.20%.
A Flotation Technique for a Sulfide-Oxidized Cu-Co Mixed Ore
Authors: Ou Le Ming , Yin Bing Yi
Published: December 2011

Conventional floatation treatment has poor effects on recovering Cu-Co sulfide-oxidized mixed ores due to the high oxidation rate and large amount of carbonaceous mud of the ores. The research results showed that the pre-removal of carbonaceous mud - asynchronous flotation process got a better flotation results than the conventional process. Using the former approach the copper grade in concentrate achieved to 21.2% and the recovery achieved to 88.55% when the raw ore contained 2.63 % Cu, 0.04% Co and 6.63% C. It was also found that using sodium hydrosulfide (NaHS) was more beneficial than using sodium sulfide (Na2S) for the activation of cobalt oxide.
Reliability Analysis on the Repaired Shaft Project Based on an Improved Response Surface Method
Authors: Dong Lu , Gao Qian , Zhai Shu Hua , Yue Bin
Published: December 2011

In order to analyze the reliability and failure probability of the repaired shaft engineering, this article makes fail-safe analysis and instability risk prediction of the shaft engineering. A reliability analysis method was applied combining the improved response surface method which has improved sample points’ selection based on the traditional response surface method to decreasing the number of the structural analysis under the premise of the accuracy of the calculated results with numerical simulation. The limit state whose failure criteria was safe factor was constructed to analyze the reliability of the repaired shaft engineering, the reliability index of the repaired shaft engineering was computed by JC method. The results show the reliability index value of the repaired shaft engineering is 3.1127 slight fewer than design objective value and it’s failure probability value is 0.0929%, which show that the repaired shaft is stable and it’s deformation should be monitored to ensure it is safety application because of it is reliability index value slight fewer than design objective value.
Study on High Efficiency Mining Technology of Adjusting Mining Face
Authors: Ai De Chun , Lu Gang
Published: December 2011

In order to reduce the coal loss and raise recovery ratio, rotational adjustment mining is used in the last stage of mining No.31100 work-face for recovering triangle coal. The paper optimized the adjusting mining plan of working face, selected the best adjusting scheme, calculated the cutting cycle numbers and the reasonable length of each section of working face, designed the construction technology process of adjusting mining, calculated the advancing distance when joining each chute, proposed the methods of roof control for head section and areas of the T-junction and leading support in coal roadway
Effect of CMCS on Cure Characteristics of Natural Rubber
Authors: Wang Yong Zhou , Huang Hong Hai , Gui Hong Xing , Chen Tao , Zhang Fu Quan , Zeng Ri Zhong
Published: December 2011

The effect of carboxymethyl chitosan (CMCS) as preservation on cure characteristics of nature rubber (NR) was studied, which compared with NR using ammonia water as preservative agent. The results showed that the induction period and optimum cure time of sample N (Ammonia water dosage is 0.15% of the mass of fresh latex), CMCS-1(CMCS dosage is 0.05% of the mass of fresh latex) and CMCS-2(CMCS dosage is 0.1% of the mass of fresh latex) were obviously decreased with the increasing of temperature, corresponding to Arrhenius equation perfectly. The maximum torque was linear dependence on curing temperature and decreased with the increasing of curing temperature. The relation of MH0 were as follows: N>CMCS-1>CMCS-2, respectively.
Comprehensive Evaluation of Blasting Effects Based on Variable Weight Method and Research on Fuzzy Decision
Authors: Zeng Xin Zhi , Fang Ze Fa
Published: December 2011

Abstract: Fuzzy comprehensive evaluation and fuzzy decision are applied in the various fields. In this paper, the comprehensive evaluations based on variable weight method and fixed weight method were compared and analyzed in terms of the comprehensive evaluation blasting effects. It is concluded that the comprehensive evaluation based on variable weight method, which the arithmetic average algorithm was adopted on, was an effective and reasonable method for comprehensive evaluation of blasting effects. Additionally, the comprehensive evaluation based on variable weight method is a powerful tool for multifactor-fuzzy decision on the blasting plans.
Kinetics of Leaching Vanadium with Sulfuric Acid from Carbonaceous Shale Containing Vanadium
Authors: Liu Yan , Sun Cong , Zhong Wei Jun , Zhai Yu Chun
Published: December 2011

ηA kinetic study of the leaching of stone coal ore with sulfuric acid has been investigated. The effects of the stirring speed, particle sizes of stone coal, acid concentration, leaching temperature and acid-ore ratio on the leaching rate of vanadium were examined. It was found that the leaching rate of vanadium was significantly influenced by leaching temperature. The shrinking core model was applied to the leaching process and the results showed that the process was based on chemical reaction control. And the rate of reaction was expressed as 1-(1-η)1⁄3=4.98×106·e-55488⁄RT·t. The apparent activation energy for the leaching of vanadium⁄ was calculated to be ¾5⁄5.49 kJ/mol using Arrhenius expression.
Analysis of Factors Affecting Carbon Content Detection of Ferrochrome Alloy Using LIPS Method
Authors: Lin Xiao Mei , Liu Jin Tong
Published: December 2011

Metal smelting process all kinds of element content directly influence the metal performance index and smelting process control .The amount of carbon become mainly alloy index for divided type and number. LIPS using high power laser ablation material produce plasma, in plasma radiation spectrum analysis; it could be used in the composition of solid, liquid and gas composition and concentration measurement. But the results of the measurement will be affected by some factors, this article through some experiments, that show the Influence factors for the measured results such as the delay time，the different environment of gas and the laser pulse energy and analyzed them.
Study on the Relationship between the Safety Width of the Distress Zone and the Gas Outburst Danger
Authors: Wei Jian Ping , Wang Yun Gang , Liu Yan Wei , Wang Deng Ke
Published: December 2011

Having analyze the stress-strain curve of coal containing gas and their failure types, we draw a conclusion that coupling effect between the Ⅱ failure type of the coal containing gas and high-speed gas seepage leads to the occurrence of gas outburst, which provided theoretical basis for the stress distribution characteristics of coal before heading face and preventing the occurrence of sudden gas outburst. The relationship between the safety width of the distressed zone and the gas outburst danger, and the quality relationship between the safety width of the distressed zone and its influence factors as for a colliery, are both discussed. The result is significant to the prediction of gas outburst in the coal tunnel, the reasonable support for the tunnel and the mine gas drainage.
Study on Engineering Education Training Mode of the Experience-Orientation
Authors: Yin Li Xin , Yan Jing , Li Guo Wen
Published: December 2011

To build a new type of engineering education training mode meet the Chinese national condition. The mode of experience-orientation stress on cultivates engineering spirit and engineering consciousness; acquire engineer experience and skills actively. The eight principles of engineer education are important idea, the credit system, the mentor system, Professional certification system are the foundation of engineering education, under the CDIO background adopt TSIP educational model, encourage and guide the student to learn cross major, interdisciplinary, unify the school and social, unify the class and the scientific research, realizes eminent engineer talent training.
Performance Simulation Research of Electronic Controlled Gasoline Engine
Authors: Lei Ji Ping , Zuo Qing Song
Published: December 2011

To solve the high or low speed air-intake contradictions in the air-intake system of fixed parameters，based on predesigning the air-intake pipe length variable system in electronic controlled gasoline engine, the gas flow in the pipes is computed and simulated according to the simulative calculation method. The Performance of electronically controlled gasoline engine is analysed under the different speed and load.At the end,the dynamic performance influenced by the length parameter vary air-intake pipe,which findings provide a good reference value for the improvement of the engine’s dynamic performance.
Grain Refinement of Direct Chill Cast 7050 Aluminium Alloy with Low Frequency Electromagnetic Field
Authors: Zuo Yu Bo , Zhao Zhi Hao , Cui Jian Zhong
Published: December 2011

Low frequency electromagnetic casting (LFEC) process was used to make 7050 aluminum alloy 162mm ingots and study its effect on the as-cast microstructure. Effects of electromagnetic field parameters such as frequency and current intensity on microstructures were systemically investigated. The results showed that LFEC has a significant grain refining effect on 7050 alloy. The microstructures of LFEC ingot from the border to the center of the cross section are all equiaxed or nearly equiaxed grains which are much finer and more uniform than those of DC cast ingot. It was also found that electromagnetic field frequency and current intensity play important roles on the microstructure refinement. The discussion was mainly focused on the mechanism of grain refinement by LFEC process.
A Proposal for Reliable Routing in Communication Network
Authors: Dohare Punjan , Jha Sumit
Published: December 2011

Multipath routing plays an important role in communication networks. It can increase the effective bandwidth between pairs of vertices, avoid congestion in a network and reduce the probability of dropped packets. In this paper, we built model for vertex-disjoint paths problem and then proposed algorithm for finding the shortest pair of vertex-disjoint paths. We consider in this paper the shortest-path problem in networks in which the length (or weight) of the edges are considered. We present algorithms for finding the shortest-path. In more restricted transit. Furthermore, we can extend this algorithm to find any k disjoint paths whose sum-weight is minimized.
Research on the Application of Web Mining Technique Based on XML for Unstructured Web Data Using LINQ
Authors: Kaur Payalpreet , Garg Raghu , Singh Ravinder , Singh Mandeep
Published: December 2011

Web data mining is a field that has gained popularity in the recent time with the advancement in web mining technologies. Web data mining is the extraction of data on web. The term Web Data Mining is a technique used to crawl through various web resources to collect required information, which enables an individual or a company to promote business, understanding marketing dynamics, new promotions floating on the Internet, etc. The data on web is unstructured, irregular and lacks a fixed unified pattern as it is presented in HTML format that represents data in the presentation format and is unable to handle semi-structured or unstructured data . These difficulties lead to the emergence of XML based web data mining. XML was created so that richly structured documents could be used over the web.XML provides a standard for the data exchange and data storage .This paper presents a web data mining model based on XML. In this model first of all unstructured data is transformed to XML and then XML document is stored in database in the form of the string tree, then specific records are searched using a LINQ query. If record does not exist in the database then check the updates of specific website and repeat the same steps. At last data selected by LINQ Query is displayed on web browser. The feature that helped to increase the speed of data extraction and that also reduces the time of extraction is the presence of database that stores the data that have been extracted earlier by a user and can be used by other users by passing a LINQ query .In this model there is no need to create an extra separate XSL file because this model stores xml document in the database in the form of the string tree. This model is implemented using C# with XML.
Adsorption and Preconcentration Capabilities of Porous Nano-Barium-Strontium Titanate for Nickel in Water
Authors: Zhang Dong
Published: December 2011

The adsorption capability of porous nano-barium-strontium titanate by sorghum straw template method (SBST) for nickel in water was studied. The optimum experimental parameters for the adsorption and preconcentration of the nickel, such as pH, time, eluent and coexisting ion, have been investigated. The results showed that the nickel in water could be adsorbed on the SBST. The adsorbed quantitively was affected by the pH value of medium and time. In the medium of pH 5-8, the adsorption time was 20 min, and capacity of adsorption was 13.27 mg•g-1. The adsorbed nickel could be completely eluated using 2 mol•L-1 HNO3. The pre-concentration factor for nickel was more than 100. The method has been applied to the preconcentration and flame atomic absorption spectrometry determination of nickel in water samples. The recoveries were 92.0%-104.0%.
Free Vibration of a Carbon Nanotube-Based Mass Sensor
Authors: Soltani Payam , Pashaei Omid , Taherian Mohammad Mehdi , Farshidianfar Anoushiravan
Published: December 2011

In this paper, nonlocal Euler-Bernoulli beam theory is applied to investigate the dynamical behavior of a single-walled carbon nanotube (SWCNT) with an extra added nanoparticle. The SWCNT is assumed to be embedded on a Winkler-type elastic foundation with cantilever boundary condition. This configuration can be used as a nano-mass sensor which works on the basis of the changing the natural frequencies. The results show that the added mass causes an obvious increase in sensitivity of SWCNT-based nano-mass sensor, especially for stiff mediums, small nonlocal parameters, and stocky SWCNTs.
Molarity Effect on the Structural Properties of Nano-MgO Thin Films
Authors: Habibah Zulkefle , Lyly Nyl Ismail , Bakar Raudah Abu , Mahmood Mohamad Rusop
Published: December 2011

Nano-MgO thin films were grown on the cleaned glass substrate via sol-gel spin coating techniques using magnesium acetate tetrahydrate, ethanol and nitric acid. For the thin films deposition, the solutions were prepared at six different molar concentrations (0.1M, 0.2M, 0.4M, 0.6M, 0.8M and 1M). The thickness and roughness of nano-MgO films was found to be increased with an increase of molar concentration. The increment in particle size and agglomerated particles were observed from FESEM (JEOL JSM-J600F) images as the molar concentration increased from 0.1M to 1.0M. The results showed 0.4M nano-MgO films have the best properties for example it has a uniform film, non-porous structure and has nanometer dimension size which around 42.8nm.
Investigation on Resonance Effects of Closely Resonating Nano-Pillars Attached to SAW Resonator
Authors: Ramakrishnan N. , Nemade Harshal B. , Palathinkal Roy Paily
Published: December 2011

Surface acoustic wave (SAW) sensors form an important class of micro sensors in the microelecto mechanical systems (MEMS) family. Mass loading effect of a sensing medium is one of the prime sensing principles in SAW sensors. Recently we reported mass loading effect of high aspect ratio nano-pillars attached to a SAW resonator. We observed increase in resonance frequency of the SAW resonator in addition to the general mass loading characteristics. We concluded that when the resonance frequency of the pillar is equal to the SAW resonator frequency, the resonance frequency shift caused by mass loading of pillar tends to a negligible value. When such resonating pillars are used as sensing medium in SAW sensors, even a very small change in the dimension of the pillar will offer significant resonance frequency shift. Accordingly, high sensitive SAW sensors can be developed. However in practice it’s quite difficult to manufacture nano-pillars with accurate dimensions such that they resonate with SAW resonator. There is more probability that the pillars may closely resonate with SAW device and offer mass loading. In the present work we have extended our earlier work and performed finite element method (FEM) simulation to study the insight physics of the closely resonating pillars and their effects on acoustic wave propagating on SAW substrate. In this paper we present the discussion on the resonance effects of typical closely resonating pillars on resonance frequency spectrum of the SAW resonator and observations in the pressure wave at the contact surface of the pillar and SAW resonator substrate. It is observed that when the nano-pillars closely resonate with SAW resonator, the pillar oscillations combine with waves propagating in the substrate and introduce beat frequencies. The results and discussion of this paper adds additional information in designing SAW based coupled resonating systems.
Novel Plastic Modelling of Micro and Nanostructure Materials
Authors: Farahmand Hamed
Published: December 2011

Several methodologies have been proposed to model the effect of length scale parameters in constitutive equations. Most of them are developed based on strain gradient theory. The main restriction is contributed to the large scale of imposed plastic deformation in comparison with implementation of length scale parameters. Also comparing to the scale of dislocation movement and hardening mechanisms, the plastic deformation in microstructures and nanostructure materials is sufficiently large that finite plasticity theory could be well justified. Therefore, the main intention of this paper is to develop strain gradient deformation with the corporation of finite plastic and dislocation theory as physically based attribution in constitutive equations. This procedure is accomplished with intrinsic length scale relation, which is dedicated to develop phenomenological of plasticity laws for microstructures in finite plasticity. Finally, the result of new theory is indicated for microstructures and its predictable results are discussed for nanostructure materials.
Artifact Removal from ECG Signal Using Notch Filter for Developing Countries
Authors: Gupta Varun , Singh Gavendra , Sharma Rohit , Pahuja Sharvan Kumar
Published: December 2011

In an increasingly noisy society, methods of reducing noise are becoming more important. Filtering has the great importance in the field of the biomedical signal processing. In many applications of signal processing it is desired to remove sinusoidal interferences while leaving the broadband signal unchanged. Examples are in the areas of communication, control, biomedical engineering and others. A typical one is to cancel 60 Hz power line interference in the recording of electrocardiogram (ECG). Usually this task can be achieved by the notch filters characterized by a unit gain at all frequencies except at the sinusoidal frequencies in which their gain is zero .To eliminate one narrow band of frequencies one uses a so-called "notch" filter (named for the fact that it makes a notch in the frequency spectrum).In this paper we have given a notch filter of cost Rs 200. (4 USD approx.) that’s why it will be very beneficial for developing countries.
Repulsive Nonlinear Schrödinger Equation and Bose-Einstein Condensate in Phase Space
Authors: Lu Jun , Wang Yun Zhi , Mu Xiao Yun
Published: December 2011

Within the framework of the quantum phase-space representation established by Torres-Vega and Frederick, the rigorous solutions of repulsive nonlinear Schrödinger equation are solved, which models the dilute-gas Bose-Einstein condensate. The eigenfunctions in position and momentum spaces can be obtained through the “Fourier-like” projection transformation from the phase-space eigenfunctions. It shows that the wave-mechanics method in the phase-space representation could be extended to the nonlinear Schrödinger equations. The research provides the foundation for the approximate calculation in future.
On the Relations between Ampere Force and Lorentz Force
Authors: Liu Yi Peng
Published: December 2011

Ampere force and Lorentz force are two different definitions in the field of electromagnetism. Some teaching materials have been confused by the relations and differences of the tow definitions. Generally speaking, Ampere force is not the resultant of Lorentz force which all the free electrons have in the carrier wire, either in numerical value or orientation. Acting in numerical value, Ampere force equals the algebra sum of the Lorentz components forces which all the free electrons endured in the (L×B) directions.
A Prediction of Vehicle Possession in Hunan Province Based on Principal Component and BP Neural Network
Authors: Li Yin , Zhou Xin Shao , Kui Chao , Tian Ya Ping
Published: December 2011

Prediction of car ownership has direct reference significance for the development of urban transportation and construction of urban roads. By analyzing the impact factors of urban auto possession, this paper first analyzes 8 indicators such as urban population, GDP, road passenger traffic and so on determined by some references, then establish BP neural network model to predict the vehicles possession in Hunan Province from 2006 to 2008. The figures of prediction is 989,300, 1,221,800 and 1,370,300 respectively in 2006, 2007 and 2008, which is very close to the real ownership of 946,400,1,217,200 and 1,426,700 respectively. It shows the prediction is very accurate. This suggests that the BP neural network has very strong learning and generalization ability and can be employed in prediction of vehicle possession effectively. The prediction of car ownership, as a foundational work for transportation planning,has direct reference significance on the development of urban traffic,its control and management and construction of urban road, etc.Early in 1940s this research has been started in foreign countries[1]. Many different models of prediction of car ownership have been developed.Many of them are developed mainly based on the factors such as urban economy, population network capacity, the land utilization and parking facilities.In China there are also some researches on this issue. They predicate the car ownership mainly by time series prediction, regression analysis and fractal theory and entropy method [2~6].However, these methods do not comprehensively describe the complex relationship between car ownership and other factors. The author of this paper chooses some car ownership-related factors and employ principal component method to analyze to obtain the main factors, then tries to find the relationship between BP neural networks and car ownership according to these factors so as to predict the car ownership in Hunan Province form 2006 to 2008, which will be greatly significant to the development of urban transportation, management and construction.
Research and Progress of Image Compression Coding Based on Wavelet
Authors: Cui Yue Li , Chen Zhi Gang , Chen Ai Hua
Published: December 2011

Image compression is a technology using as little as possible bits to represent the original image. As wavelet transform has local characteristics on the time and frequency domain, it makes up the deficiency of DCT. Moreover, its multi-resolution characteristics can easily associate with the human visual system (HVS). Besides, wavelet-based image compression is prone to combine with new image coding methods. It has become the research hotspots at present. This paper introduces wavelets theory and discusses the research status and progress of wavelet-based image compression then points out the main problems. Finally, the prospect in the future was presented.
Commodity Anti-Counterfeiting Based on the Android Platform
Authors: Zhang Wen Xiang
Published: December 2011

This paper describes that through Android platform in the mobile terminal we can send or receive the commodity anti-counterfeiting message, send commodity anti-counterfeiting message to enterprise information processing platform, send back the data to mobile terminals which had been processed, and displayed to consumers’ the screen through the information processing. Mobile terminal anti-counterfeiting technology has much more sophistication than the no digital anti-counterfeiting technology. It not only can feedback commodity genuine or fake information to consumer, but also can help the enterprises to realize merchandise sales information collection through computer network technology, database technology, and enterprise intelligent web system.
Centroid Locating for Star Image Object by FPGA
Authors: Jiang Hao , Fan Xiao Yu
Published: December 2011

Fast and accurately centroid locating can makes the star image recognition more efficient. The Gauss curve fitting method has higher accurate than traditional centroid locating. The process of centroid locating was investigated with the parallel character of FPGA. First, the star image was divided with the method of average threshold. Secondly, the star pixel was recognized by moving a 3×3 template. Finally, used the Gauss curve fitting method to located star centroid. The algorithm for image divided, star pixel recognition and Gauss curve fitting methods was realized in the same time by FPGA. A simulation was done by combining the computer with the hardware circuit. The results show that it spend less than 6ms to process a 512×512 star image and the locating precision less than 1/20 pixel when signal-to-ratio is less than 0.05. It indicates that centroid can be located accurately and fast by FPGA with Gauss curve fitting method.
Shallow Analysis of Mobile Learning Environment under Cloud Computing
Authors: Dong Jing , Han Jun , Liu Jing , Yin Hui Bin
Published: December 2011

Mobile learning is a new way of application of mobile communications technology. As a new way of learning mode and technology it must be pay much attention. It is severely affected by network technology. Cloud computing, a new computing model, is proposed based on a distributed system, grid computing, etc. It is a new way of sharing infrastructure. Cloud computing will develop a new environment of learning space, information sharing, collaboration and learning to the field of education. This article explores the impact of Cloud computing to mobile learning from several factors of the mobile learning environment.
A 2D Ray Tracing Method Based on the Virtual Source Tree in Urban Environment
Authors: Liu Zhong Yu , Guo Li Xin , Ding Xiao Yu
Published: December 2011

In this paper, a new RT method for the calculation of radio coverage in urban environment using a virtual source tree, which is based on the numerical simulation of geometrical optics (GO) and the uniform theory of diffraction (UTD) and can solve some of the problems that other RT methods have, is presented. It is developed for two-dimensional (2-D) environments and can be applied to any complex propagation environment. It is fundamentally a point-to-point tracing method, so reception tests are not required and it guarantees high accuracy. To validate our RT method, signal path loss was calculated, and it was also compared with the published measurements. The results of the proposed method in this paper show good agreement with the measurements.
Design of Survey Analysis System Based on Data Visualization
Authors: Yu Wei
Published: December 2011

Questionnaire Survey is one of the most popular methods in Social Science study, the process of which consists of three phases: data collection, analysis and representation. At present, the practical operations of the three phases are still backward, and the methods used in data analysis and statistic are still simple. This paper designed a Survey Analysis System based on data visualization, which can not only realize survey on the internet, but also brought data visualization into the phases of data analysis and representation, so as to help users to obtain and operate data visually and handily.
Paleozoic Carbonate Hydrocarbon Accumulation Zones in Tahong Uplift Tarim Basin, Western China
Authors: Chen Mei Tao , Yang Ning , Yang Shang Ming
Published: December 2011

Analyzing the discovered carbonate reservoirs in the Tazhong area, Tarim Basin indicates that the development of a reservoir is controlled by subarial weathering and freshwater leaching processes, sedimentation, early diagenesis, and alteration by deep fluids. According to the origin and lateral distribution of reservoirs, the hydrocarbon accumulation zones in the Tazhong area are classified into four types: buried hill and palaeoweathering crust, organic buildup reef-bank, dolomite interior, and deep fluid alteration. Different types of carbonate hydrocarbon accumulation zones are distributed mainly in specific areas of the Tazhong uplift. Because of the different mechanisms of forming reservoirs in different carbonate hydrocarbon accumulation zones, the reservoir space, reservoir capability, type of reservoir and distribution of reservoirs are often different.
Building Intelligent Virtual Learning Community Based on GAE
Authors: Han Jun , Yin Hui Bin , Liu Jing , Dong Jing
Published: December 2011

Virtual learning community has become the main online learning place for learners, and cloud computing provides new tools for the development of virtual learning community. Based on the Google APP Engine (GAE) cloud computing platform provided by Google Company, the article explained the construction of the virtual learning community in cloud computing environment.
The Design and Implementation of Fast Forwarding in Gateway Model
Authors: Liang Jun , Chen Xing Shu , Tan Jun
Published: December 2011

This paper divides the packets flowing through the gateway devices into two categories, the first one is sent to the gateway device itself and the other one is that the packets need to be forwarded by the gateway device. The port-based fast forwarding module in gateway mode proposed in this paper is an extended forwarding mode on the base of the traditional Linux network stack, which optimizes the system’s packet forwarding process, gets rid of the bridge forwarding and routing module and reduces system resources occupancy. The experimental results show that the fast forwarding mechanism in gateway mode can improve the system performance, and the classification model of the packet can greatly enhance the system’s stability and security.
Combined Design of Localization and Routing
Authors: Li Cai Xia , Wang Nai Bo , Cao Qi Ying , Liu Hong Gang , Zhou Xin Hua
Published: December 2011

Nodes self-localization and routing are two main research issues in wireless sensor networks. There are quite a few publications about sensor network localization or routing protocols, but seldom person combines them in their research work. In this paper, we combine a novel TOA location technique and a new centralized energy-efficient routing protocol. The performance of the combination is then simulated by software. Simulation results show that the routing based on the positions got by our location algorithm is as good as the routing based on true positions and can afford most application demands.
The Design of the Signal Processing Architecture of a Wireless Relay in Heterogeneous Wireless Networks
Authors: Liu Li Cheng , Hao Lu Guo , Hu Rui
Published: December 2011

Focusing on the wireless relay in heterogeneous wireless networks, a new signal processing architecture of a wireless relay has been proposed. And with an example of the heterogeneous wireless network consisted of GSM and CDMA systems, the detailed design is illustrated. The instance of the wireless relay demonstrates the feasibility of the proposed signal processing architecture.
The Design and Implementation of Reusable Data Reduction Tool in Cloud Computing Platform
Authors: Liu Dan , Dong Wei , Tan Yi You
Published: December 2011

Cloud computing model makes software reuse from the simple code reuse to the service-oriented software reuse .This paper based on the extended Google App Engine cloud computing platform, designed a reusable data reduction tool, which mainly to solve the access problem of heterogeneous data and an un-existed data type. In order to achieve data reuse, a layered data structure definition based on the reuse is provided. Finally, a data-mining system built on top of cloud computing platform is designed and implemented to verify the efficiency and the validity of data reduction module.
Protection Mechanisms and Security Operations of XS128 Flash Memory
Authors: Wu Jin , Wang Yi Huai
Published: December 2011

In this paper we study the protection mechanisms and security operations of XS128 Flash memory. By introducing the configuration regions in XS128 Flash memory, we elaborate P-FLASH/D-FLASH Protection Mechanisms and protection register FPROT/DFPROT. Besides, we put forward encryption/decryption methods to guarantee the security of MCU.
Improved Algorithm Based on TFIDF in Text Classification
Authors: Jiang Hao , Li Wen Qiang
Published: December 2011

Traditional feature weighting algorithm TFIDF doesn’t take some other factors which impact the feature weight into consideration, so this paper discusses the factors in details and proposes a new feature weighting algorithm called NTFIDF combined with these factors and TFIDF. Experiment on the KNN classifier shows that NTFIDF is better than TFIDF in text classification.
MIMO Radar Target Detection Performance Analysis with Unknown Parameters
Authors: Liu Wei Wei , Cao Ning , Lu Hao , Hu Ju Rong
Published: December 2011

Motivated by the development of Multiple-Input Multiple-Output (MIMO) communication, MIMO radar has drawn considerable attention. While, to design of MIMO radar detector, transmitting signal power and noise are usually assumed known in advance, but in practice we may need to estimate the transmitting signal power and noise first. In this paper, we introduce MIMO radar target performance analysis with unknown parameters. First transmitting signal energy is estimated by Maximum likelihood Estimation(MLE) when multipath satisfy special diversity condition and multipath has low rank. Then the detector in the Neyman-Pearson is developed and analyzed with estimated parameters. The simulation results show that the performance with unknown parameters is approximate to the detector with known parameters. The method proposed in this paper can be used to design the MIMO radar detectors with unknown parameters.
Research on Time Effect of Bearing Capacity of Jacked Pile in Soft Soil
Authors: Wang Jia Tao , Song Xiang Hong , Zhang Li Wen
Published: December 2011

Through the study on the characteristics of bearing capacity of jacked pile in soft soil, it is found that the increment of ultimate bearing capacity of the single pile is mainly determined by pile side resistance. The end resistance has little influence on the time effect of bearing capacity of pile. The relationship between ultimate bearing capacity and time can be expressed with logarithmic curve. According to penetration mechanism of jacked pile, the expansion of a series of spherical cavities in semi-infinite space is used to simulate the process of pile installation. Soil is assumed as Mohr-Coulomb material. Based on the theory of spherical cavity expansion, estimating formulas were proposed to calculate the ultimate side frictional resistance. Then the ultimate bearing capacity of single pile in different time can be obtained. Analyses show that the calculation results are close to the measured data and the error between computed and measured value is little. So it is acceptable for the formula to forecast bearing capacity of jacked piles.
Application Research of Kakadu System Based on JPEG2000
Authors: Ren Ke Qiang , Jiang Hai Ying
Published: December 2011

JPEG2000 is a new compressed standard of static image, Kakadu is a open source system which can be higher efficiency to realize the algorithm of JPEG2000. This article introduces the codec construction and the compressed stream structure in JPEG2000, analyzes the construction of Kakadu and image compression class in Kakadu, and then carries on application experiments based on JPEG2000 in Kakadu 2.2 platform. Experiments show that the compression of interest image region has higher transfer rate and lower memory compared with the original image, and JPEG2000 has higher compression rate and better visual quality compared with JPEG.
An Anti-Noise Strategy of SAR Based on Compressive Sensing
Authors: Zhu Zhi Zhen , Zhang Zhi Da , Liu Fa Lin , Li Bin Bing
Published: December 2011

In conventional synthetic aperture radar (SAR) systems, the resolution of SAR image is basically constrained by Nyquist sampling rate. It increases the requirement on A/D converter and the capacity of memories with higher resolution requirements. Compressive sensing (CS) is a possible solution to these problems. From the viewpoint of CS, sparse signals can be reconstructed from a small set of their linear measurements. In this paper, we proposed a strategy of SAR based on compressive sensing. Raw data from SAR are processed by the method of CS in the range direction with random convolution matrix as its recovery matrix firstly, and after reconstruction of the range direction the conventional azimuth compression with the use of matched filtering is carried out. The simulation results are given to prove the feasibility of the strategy. Compared to the conventional method, the proposed strategy has lower sidelobes in the range direction. Furthermore, the proposed method also possesses the anti-noise capability to certain extent.
A Novel Wearable Circularly Polarized Antenna in Body-Centric Wireless Communications
Authors: Liu Ning , Lu Ying Hua , Qiu Si Hai , Li Peng
Published: December 2011

Wearable, textile-based antennas are dominated research topics for body-centric communications because it could be easily worn on body and integrated into clothes. Since the antenna will operate on a moving person, a circularly polarized antenna is needed in order to optimize the off-body communication link. A wearable circularly polarized textile antenna for body-centric wireless communications is designed in this paper. The proposed antenna is a square-ring microstrip antenna with truncated corners with the bandwidth of 9% when off the body. When it is near the body, we simulate the human body as three-layer model including skin, fat and muscle and put the antenna at different distances to the body. The situation of antenna bending is also simulated at different radii. Specific Absorption Rate was evaluated at last.
Research on Improved K-Means Clustering Algorithm
Authors: Zhang Yin Sheng , Shan Hui Lin , Li Jia Qiang , Zhou Jie
Published: December 2011

The traditional K-means clustering algorithm prematurely plunges into a local optimum because of sensitive selection of the initial cluster center. Hierarchical clustering algorithm can be used to generate the initial cluster center of K-means clustering algorithm. The geometric features of input data can achieve a good distribution by means of pretreatment and feature extraction and selection. In the learning of fuzzy neural network, Java language is used to write source code of the algorithm. The experimental results show that new algorithm has improved the clustering quality effectively.
Research on Knowledge Talented Person Punishment Management
Authors: Zhang Xiang Qian , Liu Xuan , Zhang Yun Xing
Published: December 2011

The punishment management is an important management means of knowledge talented persons. It put forward suggestion for the knowledge talented person punishment management. there are the appropriate usage emotion punishes; strengthen to punish process management; notice to punish aiming contents; strengthen punishment communication management; hold the reasonable punishment degree; notice punishment equity and so on.
Keyword Extraction of Document Based on Weighted Complex Network
Authors: Zhan Zhi Jian , Lin Feng , Yang Xiao Pin
Published: December 2011

This document explains and demonstrates how to extract keyword from Chinese document based on weighted complex network. The characteristic and disadvantages of several common automatic keyword extraction methods are introduced firstly. Then based on the ideas of complex network, we proposed an improved automatic keyword extraction method. Using complex network, a Chinese document is first represented as a network: the node represents the term, and the edge represents the Co-Occurrence of terms. Then we calculate the integrate value of each term, the keywords are top k terms with greatest value. The experiment results show that the method is more effective and accurate in comparison with the traditional method TFIDF keyword extraction from the same document.
The Dynamics in the Bose-Einstein Condensation Process with Interaction between Three Energy-Level Bose Atoms
Authors: Li Yan Min , Zhang Li , Li Chen Di
Published: December 2011

The dynamics in the Bose-Einstein Condensation (BEC) process with interaction between three energy-level Bose atoms and Single-Mode active cavity field and between three Energy-Level Bose atoms in the quantum cavity is analyzed using the ordinary method for solving the wave function in the Schrödinger idea from the Heisenberg idea. A wave function has been established for the atoms under the BEC conditions in the quantum cavity, and the factors having effect on the BEC stability in the quantum cavity and the rules for selecting quantum leaps are analyzed.