bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimal Launch Vehicle Configuration from Existing Solid Rocket Motors Using Genetic Algorithm
Authors: Villanueva Fredy M. , He Lin Shu , Xu Da Jun
Published: September 2013

This paper describes the optimization approach of a three stage solid propellant launch vehicle configuration from existing solid rocket motors (SRM). The optimal launch vehicle (LV) is capable of delivering a small satellite of 100 kg to a circular low earth orbit of 400, 500 and 600 km altitude. The overall LV configuration and the trajectory profile were optimized simultaneously, thus the existing SRM parameters for first, second and three stages, vertical flight time, launch maneuver variable, maximum angle of attack, coasting time between first and second stage and the second coasting time between second and third stages were optimized. A genetic algorithm global optimization method has been implemented to perform the analysis, the algorithm consider mixed integer continuous variables. The results show that the proposed optimization approach was able to find the optimal solution for all three variants with very acceptable values, and the approach proved to be reliable for conceptual design level.
Determination of Morphology and Mechanical Properties of Polyhedral Oligomeric Silsequioxane (POSS) Based on Poly(vinylidene fluoride) Matrix
Authors: Liu Yi Zhi , Sun Yi , Zeng Fan Lin , Liu Jing Cang
Published: September 2013

In this paper, different amounts of fluoropropyl polyhedral oligomeric silsesquioxanes (FP-POSS) were incorporated into the poly (vinylidene fluoride) (PVDF) matrix by the solvent evaporation method. Influence of FP-POSS on morphology and mechanical properties of PVDF matrix was investigated. Good dispersion between FP-POSS and PVDF was achieved up to 8 wt% of nanofiller. The mechanical testing and dynamic mechanical analysis showed that low FP-POSS content induced a positive reinforcement effect on mechanical property in the formed composites. The results also indicated the existence of the optimal formula for producing POSS polymer composites, and POSS owning to its unique organic-inorganic structure can act as a plasticizer or as a reinforcing agent on the basis of interactions between filler and polymer.
Method of AC Servo System Based on Genetic Algorithm and Neural Network PID Control
Authors: Chang Wen Chun , Chen Cheng
Published: September 2013

BP network model has become one of the important neural network model which is used in many fields, but it has some defects. From a mathematical perspective, it is a nonlinear optimization problem, which inevitably has the local minima problem; BP neural network learning algorithm has slow convergence rate, and the convergence speed and the initial weights of choice; network structure, namely the hidden layer nodes selection still has no theory, but according to the experience. Based on the BP algorithm local extreme values, considering the genetic algorithm, combining with BP algorithm, the BP neural network optimization is achieved. Neural network using genetic algorithm optimization mainly includes three aspects: the connection weights of evolution, evolutionary network structure, learning the rules of evolution.
Application of Bluetooth in Wireless Communication of CNC Manufacturing
Authors: Jia Xiao Wei , Zhang Li Li
Published: September 2013

Through analyzing and comparing existing wireless communication protocols, this paper selects Bluetooth protocol suitable for CNC manufacturing and constructs communication system base on Bluetooth protocol.this system can solve some shortcomings of the wired network process, and make CNC machining faster, more flexible, more efficient.
Review and Expectation of Artificial Intelligent System for Wastewater Treatment
Authors: Zhao Liang , Wu Qing
Published: September 2013

From view of design of automatic control system, wastewater treatment is a complex industrial process that is difficult to control. Certain improvements have been obtained on intelligent control, water quality prediction, fault diagnosis, operating instructions by artificial intelligence technology in field of wastewater treatment such as ANN control, fuzzy control, ES control, GA control, RS control, but there are still some shortcomings and problems especially on architecture of PCS. Distributed intelligent system based on multi-agent architecture is hopeful to meet synthetic system performance requirement of wastewater treatment plant in the future.
The Effects of FGD Gypsum on the Performance of Cement
Authors: Yang Zhi Yong , Zhao Song , Hu Jun , Lu Zeng Chan
Published: September 2013

This paper studies on the effects of the heat treatment on cement. The results show that mixing the FGD gypsum which has been processed the heat treatment into the cement do has a certain influence on the cement, the strength of the cement is increased but the setting time is normal, and the rates of water loss and shrinkage of the hardened cement paste is significantly reduced, thus shrinkage cracks are effectively prevented.
The Effect of FGD Gypsum Heat Treatment Process on Properties of Cement
Authors: Yang Zhi Yong , Zhao Song , Hu Jun , Lu Zeng Chan
Published: September 2013

To clarify the utilization of flue gas desulphurization (FGD) gypsum as the retarder of cementbased materials,the effect of the properties of the slag cement with different tempemtuIe treatment of FGD gypsum was studied. The results reveal that in the case of adding the same amount, the setting time of cement shortened with the increasing of heat treatment temperature of FGD gypsum. The influence of different heat treatment processes on the strength of cements was not obvious and the strength development was good. The water consumption of normal consistency for cements changed slightly. Stability was qualified.
Effect of Trace Element Strontium on Serum Indexes in the Blood of Rats with Type I Diabetic
Authors: Wan Ying , Cheng Rong , Feng Zhi Qiang , Zhao Chen Tao , Zuo Wei , Li Zhu Hua
Published: September 2013

This paper is to investigate the influence of trace element strontium on the content of blood glucose, glycated hemoglobin, triglycerides, non-esterified fatty acid and total cholesterol in type I diabetes rats blood. Methods: Adult Wistar rats weighing 220~250g, half male and half female were used in the experiment. One-time intraperitoneal injection of Streptozotocin (STZ) 60mg/kg was administrated to rats. Three days later, the rats that have fasting blood glucose more than 16.7 mmol/L were the diabetes model rats (DM rats). Then DM rats were randomly divided into group A, rats drinking mineral water with Sr 2mg/L; group B,rats drinking mineral water with Sr 4mg/L; group C, rats drinking mineral water with Sr 6mg/L; group D, rats drinking mineral water with Sr 8mg/L and DM group rats drinking tap water, 32 rats in each group (N = 32). 8 rats in each group after the first month, the second month, the third month, and the fourth month were randomly killed and the blood was collected. Then the blood was used for evaluation of blood glucose, glycosylated hemoglobin, triglycerides, non-esterified fatty acid and total cholesterol.
Analysis of Temperature Characteristics of an AlGaAs/GaAs/Ge Triple-Junction Solar Cell by IS
Authors: Zhang Yi Qing , Cao Wen Jun , Liu Ai Min
Published: September 2013

Composition of an AlGaAs/GaAs/Ge triple-junction solar cell were analyzed using an equivalent circuit. The currentvoltage (IV) characteristics and impedance spectroscopy (IS) of it were measured in the temperature range from 20°C to 180°C. In the high-temperature range (from 140°C to 200°C) the VOCchanges faster than those in the low-temperature range (from 20°C to 80°C).This is because contribution of the VOCfrom the Ge subcell becomes nearly zero in the high temperature. R and C of the bottom subcell keep almost the same in the high temperature.
Study of Distributed Personalized Search Engine
Authors: Zhang Hong , Ma Yan Hong , Ma Wei Jun , Bao Zhong Xian
Published: September 2013

Combining distributed computing and data mining techniques, a distributed personalized search engine is put forward to solve the the problems current search engines faced. It has described the theoretical model and algorithmic processing. Under the Hadoop, a distributed platform processing information with Java, the key parts are programmed and implemented. The experimental results show that this theoretical model can improve the accuracy and speed of the user's queries so it can improve the retrieval performance of the search engine.
An OA-Based Integrated Information Management System Building for Marine Monitoring Business Processes
Authors: Jiang Du Yi , Zhan Ting , Qu Liang
Published: September 2013

Due to the increasing frequency and intensity of marine monitoring tasks, the need for a comprehensive information management system for marine monitoring to organize and implement all types of marine monitoring tasks is growing. This paper put forward an integrated information management system for marine monitoring using office automation (OA) technology which is based on service-oriented architecture (SOA) workflow. The system realized the management of monitoring tasks in all aspects and the statistical analysis of data. And it informationized the set of processes required.
Experiment and Theoretical Study on Thermal Transport Process in Nano-Sized Copper Film
Authors: Zeng Fan Da , Han Ya Ping , Wang Jin Xin , Wang Shao Ze
Published: September 2013

nanosized copper thin film was prepared on glass substrates by magnetron sputtering. 800 nm pump and 400nm probe technique were used to measure time-resolved reflectivity of copper thin film, and the heat transport processes of copper film were experimentally studied. Thermal transport processes in the copper film were numerically simulated by using Parabolic Two-Step (PTS) model with Finite Difference method. The result of the PTS model can well evaluate the measure date.
Research and Development of Web-Based News Releasing System
Authors: Zhao Qiao Fang , Li Yong Fei
Published: September 2013

News Releasing System was a common web-based information release platform. A web-based news releasing system was developed with Java Web technology based on MVC design pattern, which included such functions as news displaying, news management and user management. And client-side programming technology, JavaBean and multi-tier design used for decoupling of code were analyzed.
A Development Strategy of M-Commerce against Mobile Internet
Authors: Shen Miao Yan , Liu Chen Yu , Huang Bin
Published: September 2013

Digitization, informatization, and networking are the epoch features of the 21st century. Mobile internet, popularizing and developing worldwide with an irresistible momentum, has had a revolutionary effect on our life. Thus, a new research direction has appeared that how the M-commerce meets the consumers demand better and how to improve the overall level of M-commerce. This essay mainly analyzed the M-commerce development status and problems and put forward corresponding strategies combined with the mobile technology today.
Study of Data Security Based on Cloud Computing
Authors: Wang Hong Hua
Published: September 2013

This paper analysis the core problem of cloud computing: data secure problem, using the newly development of cryprology: fully homomorphism encrytion (FHE) to protect cloud computing data. Put forward data secure scheme based on the character that FHE can operate encrypted data. This scheme not only protect the data, but also can assure the efficency of the application.
Research and Development of Online Examination System
Authors: Zhao Qiao Fang , Li Yong Fei
Published: September 2013

Examination System was necessary to separate teaching and testing. A web-based Examination System was developed with Java Web technologies. The system provided the functions, including question management, paper generation and test online. Also the combination of client-side programming and server-side programming techniques were used and analyzed.
Design and Implementation of Cold Rolling Database System in Web Data-Access System
Authors: Teng Wei , Wang Guang Ming
Published: September 2013

This paper describes the cold rolling database system based on Web platform and the relevant technology of this system. Adopt tree-tier B/S architecture,ASP.NET technology, C# programming language. By communicating in different data storage of application , a dynamic, execute, interactive, highly efficient network application software has been built.
Analysis on Status of Two-Dimensional Code Development & Prospects Prediction
Authors: Lu Xiao Han , Yu Meng Lan , Huang Bin
Published: September 2013

With the rapid development of mobile Internet and rapid popularization of the smart phones, consumers attach increasing importance to interaction and information dissemination. In recent years, the number of users of the two-dimensional code has been dramatically increased; consumers gradually develop the habit of scan code; business models have been innovated, while the two-dimensional code as a mobile Internet portal is promoting the development of cross-media.In this paper, with analysis of cases about two-dimensional code, the reasons why the applications of two-dimensional code are popular are explored and the prospects for the development of two-dimensional code are predicted.
Effect of K2Cr2O7 Concentration on Army Green Ceramic Layer Formed of 2A12 Alloy by Micro-Arc Oxidation
Authors: Shi Xiao Chao , Xu Jin Yong , Gao Cheng , Wang Gui , Zhou Yi Qun
Published: September 2013

2A12 alloy by MAO on main salts electrolyte system of phosphate sodium is investigated. By contrast test, the influences of arc starting voltage, the thickness of the ceramic layer , growth rate, and wear resistance with different K2Cr2O7concentration are analyzed. If K2Cr2O7concentration is 2.5g/L , the arc starting voltage reached the lowest, the surface topography is the best, the wear resistance is the well.
The Application of Workflow Management System Based on Rules and Roles
Authors: Wang Qiang
Published: September 2013

Workflow technology continues to be subjected to on-going development in its traditional application areas of business process modeling and business process coordination [ .It can improve the efficiency and manageability of an enterprises daily teamwork .Traditionally, it is not easy for the workflow modeling method to describe the complex business process clearly and intuitively [ .In this paper ,we improve the role based workflow model and introduces definition and enactment models to characterize workflows. In the way ,flexible modeling and enactment of business process is supported allowing changes even during execution.Finally,an example of Financial Reimbursement System is demonstrated to prove the convenience and feasibility about the method mentioned.
Performance Evaluation of Optical Carrier Suppression Radio over Fiber System through Modulation Index Enhancement
Authors: Liu Zhao Xu , Chen Xiao Gang , Jiang Chao
Published: September 2013

The performance of optical carrier suppression (OCS) radio over fiber (RoF) system is evaluated through tuning the modulation index of Mach-Zehnder modulator, and two different data modulation schemes are considered. The quantitative simulation results validate that there exist an optimum modulation index, and the system performance could be improved if the data signal is modulated on only one of two sidebands.
Interference Modeling and Analysis for Inclined Projective Multiple Beams of GEO Satellite Communication Systems
Authors: Zheng Wei , Li Bin , Ren Shu Bo , Chen Jiang , Wu Jian Jun
Published: September 2013

In multi-beam satellite systems, Inter-Beam Interference (IBI) has a great effect on system performance. Within range of satellite coverage area, inclined projective multiple beams give rise to elliptic beam projections, resulting in that the distribution of beam projections is different from traditional cellular distribution. In this paper, an Inclined Projection (IP) model is proposed for IBI in OFDMA based GEO satellite communication systems, and corresponding analysis is also included. A comparison of carrier to interference power ratio (C/I) of users at the center of each cell with and without the consideration of IP is made, based on the simulation using different Frequency Reuse (FR) factor. The corresponding conclusions are presented. This research can provide reference for later satellite beam planning.
Effect of Fabrication Parameters on Localized Surface Plasmon Resonance Property of Gold Nanorod
Authors: Zheng Gai Ge , Xu Lin Hua , Lai Min
Published: September 2013

Gold nanorods (AuNRs) are prepared through seeded growth approach. Synthesis parameters of the amount of cetyltrimethylammonium bromide (CTAB), and concentration of ascorbic acid (AA) were studied. It is found that as the concentration of CTAB increases, the yield of NRs increases. As the concentration of AA increased from 0.05M to 0.2M, LSP shifts to longer wavelength but upon further increasing the concentration, LSP shifts back to shorter wavelength. A linear relationship between LSPR wavelength and surrounding medium dielectric constant is obtained, which is in good agreement with the theoretical results.
Game Theory-Based Routing Algorithms for Wireless Multi-Hop Networks
Authors: Ren Zhi , Peng Shuang , Lei Hong Jiang , Li Ji Bi
Published: September 2013

In wireless multi-hop networks, the quality of service provided by the system heavily depends on the cooperation between nodes. However, nodes are reluctant to cooperate with each other to save their limited resources. This tendency will put a limit on the application of the current wireless multi-hop networks. Therefore, game theory, which can analyze the strategic interactions among autonomous decision makers, becomes an ideal candidate to solve the above problem. In this paper, we first introduce the basic concept of game theory. Then, the game-theory-based routing algorithms for wireless multi-hop networks are investigated in detail and their characteristics are compared. Finally, we give the future research directions and concluding remarks.
The Development and Application of Virtual System of Physiological Function Experiments Based on Networks
Authors: Wang De Li , Fu Kun , Tang Hai Feng , Ren Xiao Dong , Meng Qing Fan , Teng Li Rong
Published: September 2013

To inspire students interest in learning, cultivate their spirit of innovation, and comprehensively improve the level of experimental lesson, the virtual system of physiological function experiments based on networks was developed, applied. [Methods] With establishment of the data management and service functions, and the support of the database, this system provides material library for various functional virtual experiments It could respond the clients access successfully. In addition, the system is available for campus network and internet access with employing network architecture. [Results] Through the actual operation, it is shown that the system run stably and well with vivid images. It is conducive to stimulate students initiative and develop their ability to innovate. [Conclusions] This system can be used in classroom, or for self-studying with networks. Therefore, it could enhances the students interest in learning and improves their creativity and imagination.
Distributed Computing Design Methods for Multicore Application Programming
Authors: Yu Qian , Li Tong , Xie Zhong Wen , Zhao Na , Lin Ying
Published: September 2013

In order to solve the serial execution caused by multithreaded concurrent access to shared data and realize the dynamic load balance of tasks on shared memory symmetric multi-processor (multi-core) computing platform, new design methods are presented. By presenting multicore distributed locks, multicore shared data localization, multicore distributed queue, the new design methods can greatly decrease the number of accessing the shared data and realize the dynamic load balance of tasks. For illustration, design scheme of multicore task manager of server software are given by using new design methods. Results shows the new design methods reduce the number of access shared resources, partially resolve the serial execution of cooperative threads and realize the dynamic task balance of server software, which validate the superiority of this approach.
JPEG2000 Image Compression Method Based on GPGPU
Authors: Wang Wei Ling
Published: September 2013

In order to improve the compression speed of JPEG2000, the JPEG2000 compression standard is analysised and it concluded that the part data of the core algorithm that is DWT in JPEG2000 are independent from each other, so it is very suitable for parallel processing. CUDA (Compute Unified Device Architecture) is a latest software and hardware exploitation platform released by NVIDIA which is very suitable for large-scale data parallel computing.Using CUDA technology on general purpose graphic process unit (GPGPU) could speed up DWT algorithm parallelly and the program is optimized based on the characteristics of GPGPU storage space. The obtained experimental results show the DWT algorithm that is optimized by CUDA parallelly can improve the computing speed.
Study of Friction and Wear Properties of C-Cu Composites Reinforced with Carbon Fiber Cloth
Authors: Li Chao , Zhu De Gui , Huang Qing Yi
Published: September 2013

C-Cu composites reinforced with carbon fiber cloth were prepared by hot pressing sintering technology. Wear test was conducted with copper ring under dry friction condition. The effects of load and sliding speed on friction and wear properties of the composites were studied respectively and meanwhile the wear mechanism was analyzed by combination with the morphologies of worn surfaces. The results show that carbon fiber cloth improves the wear resistance of composites and fiber grindings possess the ability of alleviating adhesive wear. These make abrasion loss small in the range of normal load and sliding velocity. With increasing of the load and sliding speed, friction coefficient and abrasion loss also increase. The main wear mechanism is transformed from slight adhesive wear into delamination wear and is accompanied by abrasive wear and slight oxidative wear at the same time.
A General Threshold Signature Scheme Based on Elliptic Curve
Authors: Shang Yu Lian , Wang Xiu Juan , Li Yu Juan , Zhang Yu Fei
Published: September 2013

Based on Elliptic Curve cryptosystem, a threshold signature scheme characterized by (k,l) joint verification for (t,n) signature is put forward. After being signed by a signer company employing (t, n) threshold signature scheme, the informationmis transmitted to a particular verifier company, and then the signature is verified through the cooperation ofkones from the verifier company withlmembers, so as to realize a directional transmission between different companies. Finally, the application examples of the company encryption communication system, the generating polynomial of company private key and public key were given. The security of this scheme is based on Shamir threshold scheme and Elliptic Curve system, and due to the advantages of Elliptic Curve, the scheme enjoys wider application in practice.
The Research of Negative Ion Test Method for Fabric
Authors: Sun Yun Sen , Qiu Bo , Li Qing Shan
Published: September 2013

We developed a device for automatic closed friction and analyzed its test results in this paper, which showed the influence factors in the test methods of textile negative ion occurrence amounts. The textile negative ion occurrence amounts in different time stages were tested in this process; the analysis of its influence of temperature and humidity has certain reference significance for improving testing device for testing textile negative ion concentration, on the basis, functional textiles were also studied. Finally, we put forward the influence factors in the test methods of textile negative ion occurrence amounts.
Estimation Algorithm of Two-Dimensional Direction of Arrival Based on Rectangle Array of Distributed Source
Authors: Yao Hui , Wu Ying
Published: September 2013

For estimating two-dimensional direction of arrival (DOA) of local scattering distributed source, the computational complexity of various algorithms for DOA is prohibitively high, induced by high dimension searching manipulation. According to this problem, an ESPRIT-like algorithm is proposed. The proposed algorithm exploits the rotational invariance properties of signal space, the DOA can be obtained without any peak-finding searching, which has significantly reduced the computational complexity. Simulations clearly demonstrate that the algorithm enjoys improved precision, and is more suitable for complicated environment.
An Improved Personalized Recommendation System Research
Authors: Li Xing Yuan , Li Qing Shui
Published: September 2013

In order to find information of interest and found valuable information resources in enrich Internet data. This paper describes a personalized recommendation system, personalized recommendation system is an intelligent recommendation system to help e-commerce site for customers to provide complete personalized shopping decision support and information services. for the User Rating data extreme sparseness, This paper presents nearest neighbor collaborative filtering algorithm based on project score predicted ,experiments show that this method can improve the quality of recommendation system.
Sliding Wear Resistance of Tempered T15m High Speed Steel
Authors: Huang Qing Yi , Zhu De Gui , Li Chao , Sun Pei Qiu
Published: September 2013

The dry sliding wear tests were carried out on T15m high speed steel with the M-2000 type wear testing machine, and studied the influence of wear performance due to the different loads and speeds on T15m, SEM was employed to analysis the worn surface morphology to discuss the mechanism of wear and tear. The results demonstrated that the mechanisms as well as the wear rate of T15m high speed steel were under different loads and speeds were different. Under the load of 100N, it is oxidative wear, while abrasive wear is the main reason for 150N and 200N. However, under 250N it is converted to serious oxidative wear and fatigue wear.
Outage Probability Analysis for Opportunistic Network-Coded Cooperative Multicast Transmission in Clustered Wireless Sensor Networks
Authors: Zhu Yun , Gao Jie , Zhang Xue Qiong , Wang Fan
Published: September 2013

Cluster-based protocols attempt to solve this problem by load balancing within the cluster and rotating the job of cluster head every few rounds in wireless sensor networks. In this paper, we derive the formulation of the outage probability for opportunistic network-coded cooperative multicast schemes. Simulation results show that our approach can remarkably improve the performance of outage probability than direct multicast.
The Patient Admission Scheduling of an Ophthalmic Hospital Using Genetic Algorithm
Authors: Zhang Li Ming , Chang Hui You , Xu Rui Tian
Published: September 2013

Currently, FCFS scheduling method is widely used in hospitals for patient admission scheduling, which ignores the impacts of patient length of stay and surgery arrangement on the usage of hospital resources. This paper proposes a more comprehensive mathematical model and evaluation mechanism for the patient admission scheduling of an ophthalmic hospital. A genetic algorithm (GA) is proposed to optimize the model, which can provide detailed scheduling of patient admission in the hospital for everyday. The result is compared with that of the traditional FCFS method, which indicates that the GA helps to reduce the preoperative waiting time for patients. Besides, GA can provide different kinds of scheduling for the hospital to select by adjusting the relative weights of different objectives in the algorithm.
Design of Marine Radar Signal Generator
Authors: Tong Xue Juan , Pang Jin Lei , Fu Feng Qi , Yuan Yi Lin
Published: September 2013

Radar signal generator in the high-level radar simulator equipped with true radar dsiplay can serve training and eduaction better. For this purpose, this paper analyzes real radar system, summarizes the working principle of radar signal generator, and brings forward a realization project which based on MCU.In conclusion, all signals generated by the radar signal generator meet the required by the preliminary debugging.
The Correction Algorithm Research of Inclination Paper Currency Image
Authors: Liu Hong Hai , Hou Xiang Hua
Published: September 2013

There exist low recognition speed and non-ideal recognition effect in some recognition algorithms of paper currency value. One of very important reasons is that the shooting angle makes the image inclined. This paper firstly analyses the binarization processing of RMB 100-Yuan image and then the method of acquiring straight lines in image is discussed. Thus, the inclination angle of image is calculated by using the obtained straight lines. Finally, through rotation transformation, the inclination image is corrected. The experimental results show that this algorithm has a good corrected effect to the inclination image of paper currency and improves the image recognition effect.
The Application of Vector Quantization Algorithm in Hyperspectral Image Compression
Authors: Zhao Xue Jun , Jing Yuan Fei
Published: September 2013

With the development of Aerospace remote sensing technology, the hyperspectral remote sensing technology is widely applied in earth resources detection, environment investigation and military reconnaissance, etc. It is different from multispectral image, hyperspectral image spectrum period is as many as dozens to hundreds of band, with high resolution, large amount of data, corresponding to the data transmission problem, so the hyperspectral image compression is become necessary. In this paper the vector quantization algorithm is applied for hyperspectral image compression, first convert the three dimensional hyperspectral images into two dimensional pixel vectors, and then applied the vector quantization on the transformed pixel vectors. The experimental results show that the algorithm not only has better compression ratio, and can effectively save image spectrum section characteristics, which is a kind of efficient three-dimensional compression method.
Highly Transparent Superhydrophobic Surfaces from Silica Aerogel by Sol-Gel Method
Authors: Zhang Tao Tao , Huang Jing , Zhang Rui Zhi , Mao Peng Yan , Fang Pan
Published: September 2013

We study the preparation of thin film on the glass substrate with the method of dip coating, which is based on methanol and MTMS as raw materials, making them form silica aerogel by sol-gel method. Scanning electron micrographs (SEM) show that such a film possesses a porous three-dimensional network structure. The high porosity and low refractive index determine that the transmittance rate can reach 90%. The prepared film also exhibited apparent hydrophobic effect, with the contact angle of 156.3°and rolling angle of less than 10°. The transparency and superhydrophobic of the film make it suitable as multifunctional coatings for many application fields including solar cells, cellphones and a variety of electron device.
Research on Typical Wireless Hoc Routings for Vehicular Network
Authors: Liu Yao Lin , Chen You Rong , Zhou Ying , Gao Xue Jiang
Published: September 2013

In the market, there was only specific software for network simulation or traffic simulation. They were expensive and could not support the routing simulation for vehicular network. In order to solve the problem, typical wireless ad hoc routings for vehicular network was researched in the free network simulation software NS2. The obstacle model and node mobile model were added. The nodes moved in random speed and direction on the road. Then the typical wireless ad hoc routings such as DSR (dynamic source routing), DSDV(destination sequenced distance vector) and AODV (ad hoc on-demand distance vector routing) were researched in the environment. The network packet loss rate and end to end delay time were compared and analyzed under the different situation whether obstacles block the radio. If obstacles did not block the radio and number of nodes was enough, DSDV had higher packet loss rate and the three routings had relatively low delay time. So DSR and AODV were more suitable for vehicular network. If the obstacles blocked the radio, the three routing routings had high packet loss rate. They needed to further advancement. This study provided a routing research idea for vehicular network and laid a foundation for further research.
μMAX Enhanced 190% of a Strained NMOS Based on SiGe Virtual Substrate
Authors: Tang Zhao Huan , Tan Kai Zhou , Cui Wei , Wang Bin
Published: September 2013

Based on SiGe virtual substrate technology, a high-performance strained NMOS is obtained. By growing 2~3μm SiGe relaxed layer, 100~200nm strained SiGe layer and 20nm strained silicon layer, and also forming a P-well by multiple implantation technology, a surface strained NMOS is fabricated. Finally, Measured results shown that drain-source current and the low field maximal mobility of the strained NMOS are enhancement of up to 190% at Vgs=3.5V, which is almost three times to the value of common Silicon NMOS and is also better than the 170% reported in public.
Research on 2-D Integer SDCT Algorithm
Authors: Tang Hai Yan , Sun Wen Bang , Zhang De Bao , Chang Yan
Published: September 2013

Nowadays, 2-D DCT is applied widely. But the transform matrix of DCT is expressed with floating-point numbers, so the computational complexity is high and more system resources are occupied. In addition, the 2-D DCT is accomplished by operating 1-D DCT to the rows and columns of 2-D data successively, which cannt embody the total space characteristic of 2-D transform well. To overcome these drawbacks, 2-D integer SDCT (Sub-matrix Discrete Cosine Transform) was proposed in the paper. First, several matrix operation methods were defined. Then, the basic principle of 2-D integer SDCT was deduced in detail. The theoretic analysis show that 2-D integer SDCT is easy to comprehend, convenient to operate, and simplifies the calculation of 2-D DCT.
The Improvement of Bead Wire Coating for Lorry Tyre
Authors: Liu Cai Jun , Ma Jie , Chen Jun
Published: September 2013

The truck bias tyre bead wire coating is improved, by adjusting the rubber system, reduce the bead wire wrapped filler, appropriately increasing the amount of carbon black, and using resorcinol-formaldehyde donor-silica and cobalt salt adhesion system, the strength and adhesion property of bead wire coating were improved, bead burst and the prick-out of bead wire were decreased, the bad ratio of tire caused by bead problems was reduced from 1.3% to below 0.1%, significantly improve the actual service life of tyre.
Comparative Study on Application of Information Visualization in Knowledge Organization
Authors: Shi Bin , Zhao Liu Chao
Published: September 2013

This paper discusses some basic problems of information visualization and knowledge organization, introducing the basic ideas and applications, and focused on information visualization tools in the field of knowledge organization with examples.
Congestion Analysis on Urban Traffic Network
Authors: Wang Jian Ling , Lai Hong Bo
Published: September 2013

this paper explores the urban traffic congestion problems, from four angles: the discrimination of the traffic congestion, cause of traffic congestion, congestion characteristics of urban traffic network, measures to solve traffic congestion, to conduct in-depth analysis of traffic congestion.
Remote Information Publishing System of Embedded Electric Power Parameter Recorder Equipment
Authors: Chen Lei , Zhong Rui
Published: September 2013

To begin with introducing the structure of electric power parameter recorder system, this paper indicated the detailed restrictions under special zone condition. Then, this paper discussed the method of remote connection by using RAS and TAPI services and corresponding interface functions in Windows CE environment. Finally, based on B/S structure, this paper indicated how to use dynamic web pages to realize remote information publishing.
A Improved Algorithm of Wavelet Image De-Noising Based on Threshold Function
Authors: Lin Zhen Xian
Published: September 2013

The relevant properties of the selected classical threshold function and selected threshold were compared and analyzed for the methods of noisy-image wavelet threshold de-noising. On the basis of this, a new wavelet threshold de-noising function was given in this paper. The new defined threshold function overcomes the shortcoming which the hard threshold function and the soft threshold function on higher derivatives are discontinuous by adding a variable. Theoretical analysis and experimental results show that, the constructed wavelet threshold de-noising function possess the better adaptability and de-noising effect. In the case of strong Gauss noise for the image, relatively soft threshold method, the PSNR of a new threshold de-noising method can be improved from 4dB to 6dB.
Scientific Research Project Cost Estimating Method and System Based on Improved BP Neural Network
Authors: Wang Yi Lin , Wang Guo Xin , Yan Yan
Published: September 2013

Traditional scientific research project cost estimating method cannot meet accuracy and practicability at the same time. Aiming at this problem, scientific research project cost estimating method based on neural network was built. Firstly, the construction and influencing factors of scientific research project cost were analyzed. Secondly, an estimating model based on improved BP neural network was built; a nonlinear expression between influencing factors (input) and cost (output) was created. Finally, an estimating system with the model was implemented by Java. The effectiveness of the method was tested. Testing experiment showed the estimating model based on improved BP neural network is reliable and the precision is high.
Research on the Performance of Sub-Band STAP for Wideband Interference Suppression
Authors: Wei Hong Kai , Wang Ping Bo , Yin Jing Xiang , Zhang Chun Lei
Published: September 2013

Sub-band space-time adaptive processing (STAP), which decomposes the wideband signal using sub-band filter bank, is the common intuitive way to suppress wideband interference. Based on studying angel-frequency distribution characteristics of wideband, sub-band interference and echo signal in space-time plane, the paper gives the physical significance of sub-band interference and echo signals space-time distribution and thus reveals theoretically the fundamental reason for the poor performance of sub-band STAP. Furthermore, the paper outlines the novel way for wideband linear frequency modulation (LFM) interference cancellation in the three-dimensional space-fractional Fourier domain.
Implementation of Video Transcoding Client Based on FFMPEG
Authors: Zeng Hao , Fang Yuan
Published: September 2013

As the increasing applications of streaming media, using the streaming media server to provide high-quality video service for people becomes a trend. Streaming media server for video format requirements has become the bottleneck of its development, In this paper, we give a kind of transcoding method, through compiling FFmpeg source code under the windows OS, adding the x264 video codec and FAAC audio library, we can get ffmpeg.exe which can run directly, and we use MFC to design the the operation interface, which used to convert other video formats into stream media server supported formats.
Application of the Hilbert_Huang Transform and Wavelet Transform in the EEG Processing
Authors: Zhang Gui Xin , Wu Ping Dong , Huang Man Ling
Published: September 2013

Brain-Machine Interface (BMI) could make people control machine through EEG which is produced by the brain activity, and it provide a new communication method between human and machine. The research for BMI will extend the ability of communication and control the environment and machine. The key point of the BMI is how to abstract and distinguish different EEG characters. Therefore, EEG signal processing method is the emphasis of BMI.
Wavelet Transform and Hilbert-Huang Transform are used to analyze the EEG signal in this paper. The results indicate that these two methods could abstract the main characters of the EEG, but the Hilbert-Huang Transform could express the distributing status in the time and frequency aspect of the EEG more accurately, because it produces the self-adaptive basis according the data, and obtain the local and instantaneous frequency of the EEG.
The Messaging Mechanism Based on Multi-Level Feedback Queue Scheduling Algorithm
Authors: Li Ting Shun , Xu Jiao Hui , Yu Hui
Published: September 2013

With the development of wireless communication technology, SMS , as a kind of flexible communication tools, is widely used in the various units. Aimed at large quantities of SMS processing, this paper proposes a new scheduling algorithm based on multi-level feedback queue. Multi-level feedback queue scheduling algorithm can not only make the high priority jobs response, but also make the short operations (process) done quickly.
The Modelling by Parameter Identification and Online Simulation in Refining
Authors: Chen Jing
Published: September 2013

FCCU (fluid catalytic cracking unit) is a complex system featured by highly non-linear, time variable, long time delay, and close coupling. Studying the process mechanism of FCCU, this paper defines a mathematical model for coupling parameter identification and online simulation. In addition, the author proposes comprehensive tuning technologies for multiple optimization and also systematically describes the cause-effect statistical law for parameter variation based on the input-and-output quantitative relation. The memory, comparison and reasoning of operation experience can help to guide the optimization operation in production process.
The Study & Application of Information System Based on Component Model and UML
Authors: Xia Yao Wen
Published: September 2013

This paper first introduces the basic concept of UML and artifacts, then discuss the UML and artifacts in the important role of information systems development, and combined with the development of information system of UML and components of feasibility analysis are studied, finally combined component model with UML modeling technology to develop information system has carried on the systematic study, based on UML is proposed and the components of information system development process.
SAR Image Segmentation Based on Bayesian Network
Authors: Zhang Jian Guang , Li Yong Xia , Chen Ping
Published: September 2013

In this paper, we propose a Bayesian network model. Firstly, the Bayesian network model is introduced, and Belief Propagation (BP) algorithm is utilized for model estimation. Then ExpectationMaximization (EM) algorithm is used for parameter estimation of the Bayesian network. Finally, the SAR image is segmented by calculating the Maximum Posteriori Probability (MAP) of each pixel. Experimental results show that, comparing with the Markov Random Field - Intersecting Cortical Model (MRF-ICM), our Bayesian network model gives better results in both segmentation and time-consuming.
Application of Cloud Computing in Walling Management
Authors: Li Bo
Published: September 2013

Facing the current inadequacy of informatization in walling management, this paper focuses on the design to use cloud computings reliability, secure data storage, convenient web services and strong capability of calculation. In addition, this paper sets up a model based on cloud-computing for walling management in governments. Firstly, the paper briefly introduces cloud computing, and then analyzes the advantage of walling management platform. Moreover, this paper points out the key issues should be solved. It will bring the positive effect of walling management informatization to government of China.
Based on ABQUS of Concrete Structure Nonlinear Finite Element Analysis
Authors: Jian Li
Published: September 2013

Based on the finite element analysis software ABAQUS, the nonlinear analysis of a reinforced concrete beam was carried out In this simple beam analysis, the concrete damage plasticity model in ABAQUS has been introduced thoroughly. Finally, the results of the experimentation and the ABAQUS analysis were compared in a diagram, accordingly reasons of the result difference between the two methods were discussed about, which can be a useful reference for the further study of the finite element analysis on ABAQUS.
Hiding Sensitive Association Rules by Adjusting Support
Authors: Wang Hui
Published: September 2013

Data mining technologies are successfully applied in lots of domains such as business, science research, health care, bioinformatics, financial forecasting and so on and so forth. Knowledge can be discovered by data mining and can help people to make better decisions and benefits. Association rule is one kind of the most popular knowledge discovered by data mining. While at the same time, some association rules extracted from data mining can be considered so sensitive for data holders that they will not like to share and really want to hide. Such kind of side effects of data mining is analyzed by privacy preserving technologies. In this work, we have proposed strategies by adjusting supports and quality measurements of sensitive association rules hiding.
Analysis of Encoding Methods Contributing to the Payload of Steganography
Authors: Luo Hong Jun , Xu Hai Cheng , Sun Jian Hong
Published: September 2013

In this paper, we compare Huffman coding and Arithmetic coding with ASCII coding to observe their contribution to steganography. This way is to compress the embedded information first for enhance the payload of a cover image. There are many wonderful coding methods to compress this kind of string, such as Huffman coding and Arithmetic coding. The experiment results indicate that Huffman coding and Arithmetic coding as an important preprocess step of steganography can effectively reduce the amount of secret information with efficient encoding performance. And a theory opinion related to payload calculation is proposed which can be used to describe the relationship among the three parameters of steganography: imperceptibility, information embedding efficiency and payload.
Numerical Simulation Study of the Influence of Ceiling Materials to Roof Radiation Heat Exchange
Authors: Hu Song Tao , Qi Feng , Xie Teng , Wang Xin Xin , Wang Gang , Liu Guo Dan
Published: September 2013

This article focuses on the study of the influence of ceiling materials to roof radiation heat exchange by CFD numerical simulation, which provides a theoretical basis for the choice of ceiling materials from the perspective of thermal properties.
Analysis of Image Encryption Algorithm Based on Chaotic Signal
Authors: Zhao Yu Chi , Liu Jing
Published: September 2013

This paper, based on the characteristics of the chaotic dynamics system, by analyzing the characteristics of many chaotic dynamics model in image encryption and screening studies such as comparison (computer simulation experiment), combined with some specific practices of modern encryption system, regards the chaotic signal as the carrier hiding image information, for the purpose of image encryption. It regards chaotic system as a pseudo-random sequence generator, uses the way of compounding multiple chaos, combined with image replacement technology, designs image encryption algorithm of practical value and completes the development of the experimental system of image encryption