bluuebunny/crossref_metadata_2025 huggingface dataset:
The Design and Implementation of a Hot Switch Isolation Circuit Card
Authors: Wen Quan Gang
Published: August 2014

To protect the security of critical data and application system, generally, many companies or departments use a parallel way of intranet and internet. Because every kind of security technology has its limitations, traditional security products such as firewall, VPN, data encryption, intrusion detection and network vulnerability scanning can not completely solve various security problems in information exchange between different networks. It is not able to meet all the security needs of critical networks and security data with the general products only. The way of data exchange of most of the existing products of "GAP" is mainly logic isolation .This paper describes a design and implementation of a hot switch circuit card in way of physical isolation .The data exchange mode of this circuit card is a half-duplex which can physically completely isolate intranet and internet. Through functional test and performance test, we can draw a conclusion that the circuit card can effectively achieve our demand of data exchange between different networks.
Design of Broadband RF Front-End
Authors: Xu Wei , Jiang Chun Feng
Published: August 2014

With the rapid development of communication technology, software radio technology had become more and more widespread. This paper firstly studied the software radio technology, described its key ideas and main technologies, and then analyzed the broadband RF front-end as an important component of the software radio technology, designed the architecture of RF front-end. The experiment result proved it could improve the quality of signal effectively.
Strategy for Reactive Control in Symmetrical Low Voltage Ride through of Photovoltaic System
Authors: Wang Ju Bo , Xu Wen Li , Bao Wei , Zhang Pan
Published: August 2014

The active and reactive power decoupling control of photovoltaic system is analyzed in this paper. The DC-DC and DC-AC two level photovoltaic inverter model are built on the RTDS. A new type LVRT control strategy about photovoltaic system is proposed. In the symmetrical grid drop fault case, photovoltaic system output reactive power to support the grid voltage recovering and save reactive power equipment. The feasibility and effectiveness of the control strategy is verified by simulation and experiment on the RTDS.
The Research of HART Sensor System Based on ARM
Authors: Li Dan
Published: August 2014

This paper discusses the design method of economical and practical HART protocol communication system, and describes the research scheme in detail, according to the hierarchy of the system protocols: the physical layer, data link layer and application layer. This scheme includes the design of ARM embedded controller module, modulation and demodulation module and USB interface module and other components. According to the effect of the final product used in the field bus network, it is proved that the operation is stable, accurate, simple and easy.
The Battlefield Electromagnetic Environment Complexity Evaluation Methods
Authors: Rong Hua , Yang Xi , Chen Ming Rong
Published: August 2014

As the information weapons large role in information war, the battlefield electromagnetic environment becomes more and more complex, and having a profound impact on operations, in order to make the controller in the complex battlefield electromagnetic environment for the correct decisions, need to evaluate the electromagnetic environment. In this paper , based on the battlefield electromagnetic environment elements are introduced, on the battlefield electromagnetic environment are classified and analyzed the complexity of electromagnetic environmental assessment of general evaluation and complexity of specific evaluation methods, on the battlefield electromagnetic environment assessment has important application value.
Design of Voice Carpooling System Based on the LD3320
Authors: Yu Man Hua , Gong He , Wu Zi Yu , Li Shi Jun
Published: August 2014

In order to make emends for the disadvantages of a taxi software, and considering the disadvantages of existing car-sharing system for a taxi, a voice carpool system, which was embedded the voice recognition technology and the wireless transmission technology, was proposed and designed. The recognition module can recognize the voice of drivers and passengers. The data and information in the system are transfered using wireless transmission technology. The ultra-thin LED screen is the core part of the system. In the system, the address saied by drivers or passengers is transformed the voice signal. Then the part of voice recognition for the system change the voice signal to related digital signal and transmit the digital signal to the part of display for the system. Eventualy the address information of passengers is displayed on the electronic screen. So passengers on the street can catch sight of the direction ,which the taxi will go. The system operated steadily, and achieved inputing of the voice carpool information, wireless data transmission and bi-directional display function on the LED creen. It will satisfy and help people to obtain the carpool informations clearly, intuitively and quickly. Meanwhile, it can also help to improve the utilization rate of taxies. So the voice carpool system will be applied certainly and popularly.
Research and Design of Handheld Thermal Transfer Label Printer Based on STM32
Authors: Xu Yang , Cheng Jing Mei
Published: August 2014

Handheld label printer has been widely used in various aspects of production and people’s life. By analyzing system structure and indexes of the printer, the author put forwards corresponding solutions. Firstly, hardware structure of the printer is introduced and functions of each part are briefly described. The software, which is mainly introduced, is composed of four parts: principle computer data transmission, character data processing, ribbon, position switch and label detections, and realization of print out task. With several debugging, label printing of high quality is achieved.
Stress Testing and Analysis for the Trunnion of Cradle of an Artillery Based on Resistance Strain Gauges
Authors: Zhang Zong Zhi , Qin Jun Qi , Di Chang Chun , Hao Gang
Published: August 2014

Stress of trunnion was tested by resistance strain gauges during the fire testing of a gun. The main stress and the actual allowable stress of the material were compared and analyzed. Stress changes of trunnion were acknowledged. Faults monitoring and eliminate of artillery fire system was provided with proofs.
Applied Research of SVG to Control the Low Voltage in Rural Power Grids
Authors: Qu Lin Kui , Chen Ji Xin , Hou Qiang , Wang Shu Han , Wu Si Cong
Published: August 2014

Recently, with the increasing strength of attracting business and investments in Liaoning coastal area or big cities’ suburbs (counties), a large number of industrial and mining enterprises have shifted to rural areas. The rural areas’ power load is growing rapidly, but at the same time, many power sites such as 66kv substation, 10kv transmission line, and low-voltage distribution area have occurred different levels of “low voltage”, which affect the daily life and production of native residents. From 2011, Liaoning Electric Power Co., Ltd. has applied the third generation of dynamic reactive power compensation technology—SVG to control the “low voltage” of rural network, which has fast speed and strong compensation. And as a consequence, there is good social and economic benefit.
Application Research of Ultra-Long Span Optical Communication Technique in Power Emergency Communication
Authors: Guo Yun Fei , Tian Wen Feng , Liu Shi Dong
Published: August 2014

This paper presents a power emergency communication solution based on long distance optical fiber communication technology. It use a portable ultra-long span optical amplifying device composed by optical components, by configuring different optical amplification scheme, using redundancy fiber to set up a new transport channel quickly, it achieve the function of emergency communication. Specific configurations are proposed for 2.5G and 10G SDH optical transmission system, and conducted field test and validation. The solution is flexible to configure and easy to install, it provides a convenient emergency communication solution for fast failure recovery of fiber line interruption, damage of relay stations, and fiber aging in electric system.
The Research about the Vibroacoustic Characteristics of the Surface Cracked Plate
Authors: Liu Gui Jie , Li Meng Meng , Wang Yu Qian , Yuan Yu Zhan
Published: August 2014

Vibration characteristics of surface cracked plate are studied from the view of structural intensity .Line-spring model of the surface crack is put forward based on fracture mechanics. The relationship of the additional angle and displacement with the crack parameters is derived. The concept of additional structural intensity is presented and the additional structural intensity’s expression of shell finite element is deduced. The change regulars between structural intensity and vibration parameters with crack’s parameters are concluded by using ANSYS and MATLAB software, the simulation results are matched with the trend of theoretical formula.
Phased Array Based on Injection-Locking Technology
Authors: Hao Yuan , Wang Li Cai , Du Qing Lei , Chen Dan
Published: August 2014

The paper studies a beamforming technology based on injection-locking technique, which is suitable for phased array. In the second section, the article designs a novel beamformer based on injection-locking, which can realize arbitrary phase weighting vector without phase shifters. The third section, the feasibility of the technique is verified by experiments.
Improvement of AODV Protocol Based on Energy-Awareness
Authors: Qiao Li Juan , Xu Li Wen , Li Zhuang , Zhang Kun
Published: August 2014

Ad Hoc network, a self-organization network system, can establish a communication to a plurality of mobile users without any infrastructure. All nodes in this type of network system exist via portable sources. The hot spot of Ad Hoc network is to realize further energy consumption reduction. In the work, an improved protocol, by which energy consumption is reduced, is proposed based on AODV protocol; named NL-AODV, it choose the optimal routing by the capacity, the nodes energy and the hop. It is verified that the improved protocol can effectively prolong the original lifetime of the network and obviously improve the routing efficiency by simulations. Consequently, it is more suitable for dynamic topology changes in the network system at present.
Application of Improved Combined Shape Genetic Algorithm on Structural Optimization
Authors: Xie Jun , Yan Jie , Zhang Jing Yu , Xu Yong Feng , Chen Meng
Published: August 2014

A new approach to the generation of an initial point is proposed for discrete combined shape, which improves fully the local searching capability of discrete combined shape algorithm. Combined shape algorithm is embedded into genetic algorithm as a combined shape operator. Consequently a hybrid genetic algorithm for structural optimization with discrete variables is proposed. The constrained optimization problems were dealt with by adaptive annealing penalty factors and penalty function. The numerical results show that improved combined shape genetic algorithm for structural optimization with discrete variable problems has a faster convergence speed, which has advantages of local searching capability and globally searching capability of genetic algorithm. Improved combined shape genetic algorithm is an efficient optimal design method for engineering structure.
An Adaptive Scheduling Algorithm for Real-Time Business over Bluetooth Sensor Networks
Authors: Li Yuan , Long Hua , Deng Li Jun , Hong Xu
Published: August 2014

Regarding the scheduling problem for real-time business over Bluetooth sensor networks, an adaptive scheduling algorithm for real-time business over Bluetooth sensor networks was proposed. By evaluating the current channel quality and data arrival rate, the best scheduling interval was computed for each link with real-time business. Master maintained a slot counter for each link and determined whether to schedule this link by comparing if the value of slot counter reached the best scheduling interval. The simulation results indicate that this algorithm has better bandwidth utilization, higher fairness and lower scheduling delay than traditional scheduling algorithms.
Research on Boundary of Active Cancellation Engineering Realization
Authors: Chen Zai Xiu
Published: August 2014

The key of the active cancellation is obtaining correctly the amplitude and phase of the target echo, and also is controlling precisely the amplitude and phase of the jamming signal. This article analyzes the characteristics of all kinds of platform’s RCS and geometrical features, combining with the measured data of projects, to get the application boundary of active cancellation. It raises the following 4 points: use of the RCS model in cancellation should consider the time characteristics; trying to control processing time-delay and channel time-delay of the jamming signals; during operation of equipment’s temperature must be relatively stable; the installing platform is the smaller, the more favorable.
Research of Data Storage Technique Based on Cloud Storage Environment
Authors: Zong Ping , Hu Rui Min , Wang Jie
Published: August 2014

According to the diversity in the nodes of cloud storage, this paper puts forward a replication layout strategy based on TOPSIS. We can apply it in the replication layout strategy in order to make full use of its advantages in multi-objective decision-making. The replication layout strategy, based on TOPSIS, uses HDFS’s racks awareness function; it makes the comprehensive evaluation of multiple attributes of multiple nodes, and by calculating the “distance” from each node to the optimal solution and the worst solution, it can choose the deployment of nodes to realize the efficiency of replication layout.
Implementation of Image Matching Algorithm Based on SIFT Features
Authors: Yin Mu Yi , Guan Fei , Ding Peng , Liu Zhong Feng
Published: August 2014

With the aim to solve the implement problem in scale invariant feature transform (SIFT) algorithm, the theory and the implementation process was analyzed in detail. The characteristics of the SIFT method were analyzed by theory, combined with the explanation of the Rob Hess SIFT source codes. The effect of the SIFT method was validated by matching two different real images. The matching result shows that the features extracted by SIFT method have excellent adaptive and accurate characteristics to image scale, viewpoint change, which are useful for the fields of image recognition, image reconstruction, etc.
An Additive NHPP-Based Reliability Model of Wireless Sensor Networks
Authors: Zhao Bo , Yang Jian Feng , Zhao Ming , Li Qi , Liu Yan
Published: August 2014

As the Wireless Sensor Networks (WSNs) are widely implemented in various fields recent years, the quality of WSNs has been increasingly concerned. WSNs can usually be divided into sub-nets, which assumed to work or fail independently. Through the failure data of those sub-nets, the additive NHPP model for reliability evaluation is composed, and then the maximum likelihood estimation is applied to estimate the unknown parameters in the model. Finally, the simulation shows that the additive NHPP model is better than general NHPP model under certain circumstances.
Design and Hardware Implementation of Image Compression Denoising Based on Median Filter and Wavelet Transform
Authors: Qu Wei , Sun Xiao Xin
Published: August 2014

An image compression denoising method based on median filter and wavelet transform is proposed in order to overcoming shortcomings of traditional methods of image processing in this paper. This method combined hardware parallelism with software technology is enable to achieve image compression denoising and take into account algorithm validation, and fast response of the system. An real-time image processing system is design by this method. Design and hardware implementation of fast median filtering algorithm based on EP1C12 FPGA chip is realized and software simulation of median filter and wavelet transform is done. The experimental results show that this system has advantages of fast response characteristic, less time consuming and high signal to noise ratio.
Reconstruction of 3D Strata Model Based on Data from Multiple Sources
Authors: Li Pan , Hu Liang
Published: August 2014

Given the multiple-sources feature of geological interface data, in this paper we propose a universal 3D modelling method using data forms presented as dirllhole diagrams, geologic sections, and vectorized contour maps. In our strategy, data from different sources are all treated as discrete property points, upon which cubic interpolation interpolation is performed to make a denser grid. The final step is accomplished through constrained Delaunay triangulation of the top and bottom grids and boundaries to generate the strata model through triangular strips. Our method merges all kinds of data sources available into one single modelling process, thus the most realistic result is guaranteed.
Analysis of Three-Dimensional Reality Modeling Algorithm in Animation Design
Authors: Cai Bai Chuan , Mei Rong Fang , Mei Jian Guo , Yang Bo
Published: August 2014

During animation design process, when the overlap of animation graphics is overtopping, inaccurate three-dimensional feature points appear in the established model, which resulting in low fidelity of model. For this drawbacks, a three-dimensional reality animation design modeling based on an optimization algorithm of animation modeling fidelity is proposed. Triangle refinement method is utilized to refine feature points distributed disorderly in the three-dimensional animation model, so as to obtain a three-dimensional animation composed of triangles, according to the method of calculating the intersection of intersecting triangles, optimal triangles can be achieved, i.e. the new three-dimensional coordinate points are acquired. Afterwards, two-dimensional coordinate calculation is processed for the new added points to get the exact coordinates of the point in the three-dimensional animation model, eventually obtain a three-dimensional animation model with high degree of fidelity.
Simulation of Mathematical Model to Estimate the Cost of Large-Scale Hydraulic Engineering
Authors: Liu Mao
Published: August 2014

With the rapid development of engineering construction and gradual introduction of the bidding system, project cost estimation model continues to deepen. How to estimate engineering cost fast and accurately become one of the hot topics currently. In this paper, the characteristics of large-scale water project investment risk is combined to establish a neural network model suited for large-scale water project cost, through quantitating the main features of each category of water conservancy and combining neural network model established to quickly estimate water project cost with the toolbox. After engineering examples show that it is a fast and reliable water project cost estimation method.
Numerical Simulation of Blast Wave Propagating on the Soil Surface
Authors: Li Xiao Yong , Cui Cun Yan , Chen Jing Peng , Jiang Yun Chun , Zhao Bei Lei , Li Xing
Published: August 2014

A numerical simulation of TNT explosion on the soil surface is presented in this paper. It demonstrates how the blast wave propagates on the soil surface and interacts with the soil surface. Compared with the explosion in air, a comparative analysis on the distribution of the shock wave overpressure is implemented. The results show that the space on the soil surface close to the explosion source can be divided into a relatively high pressure region and a relatively low pressure region. Moreover, by defining the scaled height H, the interface of two regions comes about H = 0.35.
Design and Implementation of Large-Scale Data Management System Based on C/S Structure
Authors: Zhao Zhan Kun
Published: August 2014

With the development of computer and network technology, the storage and analysis for complex and large-scale of data can be implemented. According to the requirement, this paper designs a large-scale data management system based on C/S structure which realizes concentration, integration, security management, in-depth analysis and report generation of the field data. Application of the system can improve the scientific management level of enterprises, enhance employee productivity, ensure security, integrity and accuracy of the data, and provide important data for the performance review and decisions of enterprises development, thus improving economic efficiency of enterprises.
Coverage Control Strategy for Mobile Sensor Network Based on Voronoi Division
Authors: Zeng Xia Ling
Published: August 2014

According to the multilayer sensor network structure of mobile nodes, proposing a coverage optimization control policy based on voronoi division. Based on the mobile policy of Sink nodes by the voronoi division, the essay proposes a coverage optimization control algorithm (COCA) based on coverage hole calculating to optimize the initial random deployment of sensor nodes, and then to eliminate coverage holes and improve the coverage performance of network. Simulation results show that, compared with the random deployed network, the COCA algorithm only requires fewer nodes to achieve a higher coverage ratio and to maintain in low energy consumption, which embodies optimum performance of the network deployment.
Research and Design of a Trusted Distributed File System Based on HDFS
Authors: Liu Fa Gui , Zhang Xiao Jie
Published: August 2014

Distributed file systems such as HDFS are facing the threat of Advanced Persistent Threat, APT. Although security mechanisms such as Kerberos and ACL are implemented in distributed file systems, most of them are not sufficient to solve the threats caused by APT. With the observation into traits of APT, we propose a trusted distributed file system based on HDFS, which guarantees another further security facing APT compared to the current security mechanism.
Simulation Research on Dynamic Security Model of Information System in Cloud Computing Environment
Authors: Liu Si Ping
Published: August 2014

Cloud computing can dynamically allocate the software or hardware resource and information resource in accordance with the needs of different computer users, so as to expand the virtual resources of computer, but data information exists a big security risk in the process of data parallel calculation or the data sharing, so it needs to carry out the risk assessment on the security of signal. In cloud computing, this paper introduces the second-order difference quotient calculation principle in the model of information risk assessment that has accelerated the speed of information risk assessment, and adopts second order linear security authentication model that has strengthened the security of the cloud computing. In order to verify the validity and reliability of the model, this paper uses C program language to design the algorithm and inspects the cloud data with possible existing risk, and then it obtains the deviation curve of numerical calculation and theoretical value, which provides the technical reference for the research of cloud information security technology.
Analysis on Stress State of Box-Girder Web under Prestressing
Authors: Zhao Bao Jun , Zhu Guo Rui , Yin Liang
Published: August 2014

In order to study the stress of box-girder web under prestressing, and confirming the internal stress distribution of the web, analyzing of vertical prestressed box girder, curved beam prestressed sensitivity under the webs. Establishing finite element model of the box-girder webs vertical prestressing effect is analyzed, results show that the principal tensile stress of the web is sensitive to the vertical prestress, applying the vertical prestress can effectively reduce the principal tensile stress of the web; with the decrease of the effective vertical prestress, the neutral axis above the principal compressive stress decreases rapidly, while below the neutral axis decreases relatively slow; Under the same vertical preloading stress level, the roots of cross section of the compressive stress of web reserves than L/4 section of the web.
Study on the Petri Net Model Decomposition of Metallurgical Process
Authors: Bao Hong , Guo Chao Xing
Published: August 2014

This paper analyzes the Petri net modeling of the metallurgical process. For a long process, with the gradual improvement in the process model, the size of the incidence matrix of the model will become larger. In view of the difficulty in calculation for the management and analysis of the entire model caused by the enlarged model size, this paper studies the algorithm for petri net model decomposition and a long metallurgical process is decomposed into two or more subnets for analysis of the process. Examples are used to demonstrate the effectiveness of the model decomposition algorithm.
Analysis on Differential Equation of Decision Model Based on Matlab Simulation
Authors: Wu Zhu Li
Published: August 2014

This paper introduces Runge-Kutta method into the game decision model of advertising differential equation, and establishes the two-order Runge-Kutta and the four-order Runge-Kutta differential equation models to study the impact of new fashion product on the sales and the impact of supply chain on the overall performance. In order to verify the validity and reliability of the model, this paper uses the MATLAB software to design the algorithm of advertising promotion differential equation model, and gets the accounting system of three types of advertising sales, and uses this system to statistics the sales. From the results we can see, the popular goods and seasonal goods have the largest effect on the new development fashion goods sales in three types of advertising, so it should increase the advertising delivery in popular goods and seasonal goods to ensure the sales of new fashionable goods.
Design and Implementation of Instant Communication System Based on the Android Platform Terminal
Authors: Cheng Xiao Yan , Dang Guo Qing
Published: August 2014

with the rapid development of mobile communication and Internet to the popularization of mobile terminal interaction, more and more people cannot do without real-time information, and with the growing popularity of mobile terminal and the performance and function of people constantly improve the requirements of mobile terminal is also more and more high. Instant communication is applied technology based on internet protocol, it enables users to use different devices to communicate, it is the basic function of text chat. Are not unified communication protocol is currently the major instant messaging software used. In recent years, the Android system because of its open source, easy development of widely used, it is mobile phone operating system platform based on open source Linux. XMPP is the instant communication protocol XML based on open source software, the content of XMPP is open and inherited XML characteristic.
Design and Implementation of Key Technologies of Carrier Synchronization in Wireless Communication System
Authors: Dang Guo Qing , Cheng Xiao Yan
Published: August 2014

Noise multiple and user interference are the two important influencing factors that carrier synchronization technology in the wireless communication system faces. On the one hand, the phase locked loop and data aided carrier synchronization device is faced with poor estimation precision and slow convergence speed. On the other hand frequency offset and channel estimation problem need to be solved in multi-input multi-output (MIMO) communication system collaboration under the condition of dry low signal to noise ratio. So research of carrier synchronization algorithm of low complexity, high precision in view of the low SNR and multi-user communication system is becoming an important issue.
1. Carrier synchronization technology in wireless communication system of low signal-to-noise ratio and multiuser
Research of Load Balancing Based on NOSQL Database
Authors: Wang Peng , Qi Yan
Published: August 2014

The NOSQL database to support data and high concurrent read and write,scalability and high availability features in a distributed storage system which has been applied widely. In this paper, through the research of load balancing in distributed storage system,and it proposes the consistent hashing algorithm and the virtual node strategy, in order to improve the load balancing of the system and increase the cache hit ratio. For the load balancing principle of NOSQL and SQL Server, analysis and comparison of the experimental data.The result shows that, with the increase of the number of virtual nodes, the cache hit ratio of NOSQL is higher than the cache hit ratio of SQL Server.
Research Based on the Information System Framework Building of “The New Three Mutual”
Authors: Liu Guo Tai , Wang Rui Hua , Liu Jing Xu , Shen Jian Guo , Shi Jing
Published: August 2014

Architecture design is an important part of the top-level system design, which is related to the development efficiency and quality. Description framework is how to describe the ideas and methods of architecture framework, which help relevant system research personnel understand the architecture. This paper analyzes and summarizes the model of the architectural framework home and abroad, combined with the current development of information technology and information system building needs, which uses the ability to guide the construction, and uses the demand to tract the function. Studying process of building the "new three mutual" (NTM) architecture description framework, this paper designed and completed a six-view architecture framework work, which is more responsive to the current needs of information systems development.
Fusion Algorithm Based on Improved Linear Local Tangent Space Alignment Algorithm
Authors: Peng Wen , Deng Yan Ni , Shi Yuan , Lv Yuan Xing , Li Qiang
Published: August 2014

A uncorrelated adaptive discriminant linear local tangent space alignment (UDALLTSA) is proposed based on improved linear local tangent space alignment algorithm. The algorithm uses an adaptive neighborhood selection to select the appropriate neighborhood, and introduces curvature to amend the model, modifies the constraints of the objective function by use inter-class scatter matrix, and constraints on basis vectors to compute the best projection matrix. By comparing the results of the experiments, it shows that after integrating the discriminant information into the algorithm , uncorrelated constraints and adaptive neighborhood selection can well improve the recognition rate and robustness, thus, possessing good noise immunity, and eliminating redundant information of base vectors, make this fusion algorithm a supervised learning algorithm.
Analysis Engine Based on Cloud Computing
Authors: Zhu Shan Hong , Liu Wei
Published: August 2014

In this paper come up with the idea of user behavior analysis engine, the combination of the static analysis of user behavior and real-time monitoring, real-time acquisition of Web log and user to access the context information of the page, apply to the improved data mining model analysis, which based on cloud computing technology, meanwhile efficient processing and storage, cloud database test showed that, the system can significantly improve the effect and efficiency of user behavior analysis.
A Log-Structured File System Based on LevelDB
Authors: Wu Zhi Hao
Published: August 2014

Traditional file systems have some shortages in storing small files, such as randomness of data layout, waste of disk space and lack of inode resources. In this thesis, a log-structured file system named LevelFS based on LevelDB is presented. By setting the write buffer, it can make disk randomized writes of small files into disk sequential writes, and reduce the distance of related data, so as to improve the read and write performance of file system. Experiments show that LevelFS can greatly improve read and write performance of small files without affect the large ones.
Influence of Focal Shift on Image Quality
Authors: Zhang Yu Fa , Sun Xiao Quan
Published: August 2014

Optical detectors consist of optical lenses and sensors, which lead to great influence on image quality. The modulation transfer function (MTF) was selected as the image performance index. The influence of focal shift on MTF in optical system was studied and image quality was simulated in this article. The results show that when the focal shift quantity increases, the MTF of detector decreases accordingly, and the high-frequency messages lost gradually. The conclusion is useful for design evaluate optical imaging system.
RETRACTED: Performance Analysis and Optimization of IEEE 802.11 Protocol
Authors: Wu Jian
Published: August 2014

Retracted paper: The study of systems has analyzed Web services, and current trends suggest that the study of RAID will soon emerge. Given the current status of heterogeneous communication, statisticians famously desire the evaluation of the Internet, which embodies the theoretical principles of machine learning. In order to overcome this grand challenge, we present an analysis of Smalltalk (Degree), which we use to demonstrate that erasure coding and thin clients can agree to accomplish this goal.
In-Depth Research on the File Transformation between DXF&STL
Authors: Pang Kai Min , Zhang Ying , Shi Xin , Zhao Wen Jie
Published: August 2014

Based on the in-depth analysis of the structure of DXF, STL files, there is lots of code information in entities of the 3D entity information-stored DXF files, which isn’t good for the use of the valuable information, ASCII format of STL files store the normal vector and vertex coordinates as 3D graphics data for storage in a cramped construction, easy for reading. While binary format of STL files store the information in bytes by rules. Take box as an example, and VC++6.0 programming language is used to program the data information, so as to read and display DXF file information, conduct data transformation according to the set of transformation rules, finally realizing the DXF and STL’s file transformation and displaying content, providing convenience for the file data reading of different platforms.
An Approach of Case-Base Reasoning and Fuzzy Petri Net for Product Conceptual Design
Authors: Wang Jian Wei
Published: August 2014

Due to difficult to building the complete rule base and low efficiency of rule-base reasoning (RBR), an approach combines the case-based reasoning (CBR) and fuzzy Petri net (FPN) model for conceptual design is proposed. Firstly, the similar cases are retrieved by CBR method from case base. The revision rules are established and represented by FPN. Secondly, mathematical principle of FPN is used to reason, which is beneficial to overcoming the disadvantage of low efficiency in RBR and helpful to case revision. The presented method could help designers, by referencing previous design cases, to make case revise quickly and finish the design requirement during product design. Finally, the implementation of proposed system is outlined and case study has been used to demonstrate the applicability and efficiency of the proposed approach.
Conformal Optimization Algorithm for Undevelopable Surfaces and its Application
Authors: Luo Zhen Hua , Jiang Fen
Published: August 2014

In the industrial manufacturing process, most kinds of surfaces are processed by planar materials, but undevelopable surfaces are difficult develop to the plane. The approximation algorithms to develop a undevelopable surface is an important research topic in Computer Aided Geometric Design (CAGD). In this paper, we propose a new approximation algorithms based optimization algorithm. We guarantee the deformation vector make the minimum changes during the developing process. In the paper, some numerical example are given and the can illustrate the our method is effective.
Comparison of Particle Swarm Algorithm and Ant Colony Algorithm in the Optimization of Uniform Quantizer
Authors: Yang Miao , Wang Wei Ping , Zhao Na , Yang Yi Huai , Ren Yi
Published: August 2014

In this paper, we focuse on the study of parameter optimization problem of the uniform scalar dead zone quantizer (USDZQ).We used particle swarm optimization (PSO) algorithm and ant colony optimization (ACO) algorithm for the optimization. We used the two kinds of optimization algorithm for ECG signal coding test.Those ECG signals were from the MIT-BIH arrhythmia database. At the end of this paper, the results of compression are compared.
A Mathematical Thermal Hydraulic-Mechanical Coupling Model for Unsaturated Porous Media
Authors: Yan Jun , Wei Yin Qi , Cai Hong
Published: August 2014

s: Temperature, seepage and deformation are the important parts of the engineering geological mechanics both in water conservancy and hydropower engineering since there are highly nonlinear complex coupling effect between each other. In this paper, the earth and rock mass are classified as continuous porous media. The thermal constitutive relation of porous media and motion regularity of pore fluid are deduced from the basic theory of solid mechanics, hydraulics, and thermodynamics. Based on momentum, mass and energy conservation equations, the multi-field controlling equations of unsaturated porous media are given, in which the unknown variables include displacements, pore liquid pressure, pore gas pressure, temperature, and porosity.
Simulation on the Optimization Model of Noise Filtering in Long Distance Communication
Authors: Shu Na
Published: August 2014

Optimizationmethodfor noise filtering in long-distancecommunication process is researchedto improve thesignal to noise ratioof communication.Inlong-distancecommunication, thecommunication signalsare susceptible to noiseinterference, reducingthe SNRof communication.For this reason,optimization method for noise filtering of multiplicative noise anti-interference in​​long-distancecommunication is proposed.Noisecharacteristic parameterin long-distancecommunication is extracted, and direct at the abovecharacteristic parameter,noise filtering is performed. Experimentalresults show that theimproved algorithmfor noise filtering in the process of long distancecommunicationcan greatlyimprove the communicationefficiency and accuracyto meet theactual demandfor communication.
Arrival Flow Integration Technique of the Point Merge
Authors: Huang Jin , Zhang Jing Wei
Published: August 2014

This paper show some simulation about the Point Merge in this paper. Some new methods of Integrating arrival flows with existing technology. The paper shows that even under high traffic load, Its advantages in the typical terminal area configurations These studies indicate the inhere benefits of Point Merge in flexibility and scalability. The paper also shows that Point Merge could be a basis of 4D trajectory management.
The Study of the Auto Parts Warehouse Management System Based on RFID
Authors: Gao Ting Ting , Li Chang Ling
Published: August 2014

The key technology of the auto parts management system based on the Internet of things, to realize the system function and the pre-objectives of the information management, through the construction the software part of the whole system, and the hardware of completing the information collection and transmission. Not only to save storage time-consuming, but also to avoid the emergence of errors, as compared to the traditional hand-held terminal, its identification efficiency has been improved. After RFID identification, the auto parts directly enter into the system, the efficiency has been improved than the traditional way, while the indicator on the shelves reminds effectively synchronously, improve the recognition accuracy and efficiency of labor.
Two-Dimensional Description Method of Process Information for 3D Assembly Instruction Publishing
Authors: Yang Guang Yu , Tian Lin , Zhao Dong Ping , Xin Yu Peng
Published: August 2014

To deal with the complete description and quick search in 3D assembly instruction publishing, a Two-dimension description method of process information for 3D assembly instruction publishing was presented. Two-dimensional description model of process information is established from operation description and granularity by this method. In order to organize process information with a certain description stage, the concept of process information layer was proposed, and the describe structure for process information layers was been build based on similarity criteria. Subsequently, an abstract matrix representation method is provided to express 3D process information and build the assembly instructions publishing model. Abstract matrix representation method was the key to influence the 3D process information description, Therefore, In-depth researched on it and an instantiated matrix is given. Finally, an illustrative example is used to explain an application of the proposed approach.
Time Constraints of Access Control
Authors: Han Chun Yan , Liu Lian Zhong , Yuan Yi Fei
Published: August 2014

Currently, researches on time constraints for access control are not complete. To solve this problem, this paper enriches the time constraints for access control from the following aspects: firstly, we propose a four-tuple representation of time constraint by combining discrete time representation and periodic time representation; secondly, we put forward a function of computing the time of state changing on the basis of (1); finally, aiming at conflicts detecting and resolution for time constraints, we raise an algorithm for conflicts detection and resolution based on XACML and entities overlapping detection.
Implementation of Camera Calibration Method Based on OpenCV
Authors: Zhang Ling , Yin Mu Yi , Li Wei , Liu Hai Lin
Published: August 2014

Aimed at the applications of technology of camera calibration to 3D reconstruction, the ideal camera model is discussed, especially on the influences and solving methods of lens radial distortion andtangential distortion, and an arithmetic of camera calibration based on OpenCV (open source computer vision library) in Visual C++ environment is given. This arithmetic makes use of the functions of the library effectively, so it has high calibration precision and good robust. It can meet the needs of august reality and othercomputer vision systems.
Design of Wearable Equipment Auxiliary Repair Terminal Based on IETM
Authors: Ke Hong Gang , Qiu Lei , He Bo , Chen Qi , Zhou Xiao
Published: August 2014

Portable terminal equipment maintenance was an important application field of interactive electronic technical manual, based on the analysis of its technical characteristic, a portable maintenance auxiliary equipment which was used for complex equipment maintenance had been designed. The equipment used the latest LAN technology to realize remote communication function, at the same time it integrated the multimeter module, network camera and IETM module, and it achieved the function of signal detection, information query, etc, which met the demand of the equipment maintenance support.
Smart Home System Design Based on Internet of Things
Authors: Wang Zhen
Published: August 2014

As sensor, semiconductor, embedded processing, such as the development of technology, smart home system is more and more get people's attention, make household intelligent has become a development trend. This paper analyzes the key technologies of Internet of things intelligent household the functional requirements, and the key technology of Internet of things intelligent household, expounds the principle and design requirements of the system, on this basis, design a set of relatively complete Internet of things intelligent household system. The smart home system designed in this paper can realize monitoring, alarm, control and reflect the intelligent household convenience and practicability, has wide application prospect.
Auto-DR Optimal Decision-Making Method of Smart Home Based on RTP
Authors: Liang Ying , Zou Rui , Wang Sun An , Zhou Meng
Published: August 2014

One optimization decision method is presented in order to solve the problem of how to realize demand response according to RTP in residential electricity. This method aims at minimizing the cost of electricity and the dissatisfaction of the power consumer. Optimization decision model is built based on the classification of residential electricity load and the model is solved by genetic algorithm.The results of an example show that optimal decision-making method can help reduce the cost of electricity and be beneficial to regional power grids’ load shifting. Applying this optimization decision method to AMI can realize Auto-DR according to price signal.
Automatic Batch Extraction of Specific Content of HTML Based on Tag Locations
Authors: Chi Yi Tao , Guo Ping , Gao Hao Jiang , Zhang Xiu Bao , Zhang Zhi Guang
Published: August 2014

HTML is utilized widely in web information description and exhibition. Although new technologies continue appearing during the HTML history, the basic structure and principal of HTML remains the same and HTML is still an important part for tasks such as web development and even dynamic page exhibition. We currently have mainly two types of parsers for HTML, SAX and DOM. The problem is that, the former is driven by parsing events but can only access the nodes sequentially with a slow speed, and the latter should load the whole document into memory and will consume a lot of space. In order to solve such problem, we proposed an automatic batch extraction method for specific content of HTML based on tag locations. The extraction process can be divided to two main steps, the first step is locating the start and end positions of HTML tags, the second step is finding the desired content based on the location of tags and corresponding attribute information. The first step is the core of the whole process. An example of extraction of specific content of a search result page verifies the proposed algorithm. The proposed algorithm can be further used for advanced tasks such as data mining and knowledge base establishment.
Research of Software Defect Prediction Based on CART
Authors: Yong Liu Guang , Ying Xu Lin , Qiong Zhou Cheng
Published: August 2014

Through the software defect prediction can effectively guide the rational distribution of software system development resources, so as to improve the quality of software and software reliability. In order to fully utilize the existing historical data to guide the software development of existing software system development, this paper based on an improved classification and regression tree (Classification and Regression, CART) algorithm software defect prediction models. The paper first principal component analysis of the data predicted correlation dimension (Principle Component Analysis, PCA) between data and reduce the data, and configured according to the theory and optimized CART decision tree algorithm, existing software defect prediction system, and with traditional defect prediction method, the experimental results show that the proposed prediction model has higher prediction accuracy and stability.
Traffic Volume Prediction Using Improved Kalman Filter
Authors: Chen Xin Jie , Ma Ji Hui , Guan Wei , Tu Wen Yuan
Published: August 2014

Traffic volume prediction has been an interesting topic for decades during which various prediction models have been proposed. In this paper, Kalman filtering (KF) model is applied to predict traffic volume because of its significance in continuously updating the state variable as new observations. In order to enhance the prediction accuracy, an improved KF model is developed based on the current and historical data. To validate the improved KF model, empirical analysis is conducted. The results show that the improved KF model has higher accuracy than the traditional one and is more reliable and powerful in traffic volume prediction.