bluuebunny/crossref_metadata_2025 huggingface dataset:
A Hadoop-Based Performance Optimization of Network Stream Input Format
Authors: Wang Xiao Ping , Luo Jiang Tao , Gao Wei , Liu Yong
Published: September 2014

Network stream analysis is one of the essential applications of industrial research in the era of big data. As the input format of the major massive data application platform--Hadoop, cannot support network stream sufficiently. This paper proposes a feasible optimization design. Firstly, the HDFS block-storage structure and the particular libpcap file format of network stream are considered. Then input files were pre-processed as large as HDFS block-size, and a new data input format called blockPcapInputFormat is achieved by expanding the fileInputFormat of Hadoop. Furthermore, experiments are performed for verifying the proposed design’ effectiveness. Results have shown that the optimization scheme is not only able to accelerate the processing performance of libpcap files effectively, but also suitable for applications where Hadoop parses network stream.
The Simulation Platform in City Traffic Environment Based on TinyOS for Wireless Sensor Networks
Authors: Ren Tiao Juan , Lv He Xin , Wang Zhang Quan , Chen You Rong , Liu Yao Lin
Published: September 2014

Currently, the algorithms for wireless sensor networks which are applied in the field of intelligent transportation use NS2, Matlab software to simulate. The theoretical research results remain a certain distance from their applications in practical system. In order to solve the problem, the simulation platform in city traffic environment based on TinyOS for wireless sensor networks is researched. The structural framework of simulation platform in city traffic environment which is composed of vehicle nodes, relay nodes and sink nodes is proposed. Four design steps of application program and five simulation steps which are composed of simulation compile, network configuration, python simulation, data statistics and simulation result analysis are proposed. CTP protocol and three different movement scenes are used to test and verify the platform. Experimental results show that the algorithm performances with different parameters are obtained, and the simulation platform can verify the algorithms of wireless sensor networks in city traffic environment. The simulation platform combines theory simulation and practical application. It provides a simulation platform for the research on intelligent traffic algorithms, and shortens the algorithm development time.
The Software Support Analysis of Information System
Authors: Wang Hua , Li Xian Yu , Wang Xue Ning , Liu Wei Na
Published: September 2014

Based upon the synopsis of software support of information system, this paper puts forward main factors, integrated model and phase tasks of software support of information system, and gives description to software supportability analysis technology, software fault diagnosis technology, software fast recovery technology and software remote support technology so as to increase software support capabilities and information system effectiveness.
Study on a Novel GIS-Based Routing Strategy
Authors: Wang Yue Wei , Ji Ding Yi
Published: September 2014

Given a scenario of Vehicle Ad hoc Network (VANET), this paper presented a GIS-Based routing (GBR) strategy to resolve frequent reconstruction caused by rapid topology changes. Due to the use of road information based on GIS, the protocol can evade permanent or temporary topology holes respectively which frequently occurred in the city scenario. Simulation results showed new routing protocols could achieve better performance in packet delivery ratio and proved GBR’s lower routing overhead, as well as it is better performances in high mobility, compared with DSR in urban vehicle environment.
The Study of Network Information Security Based on Information Filtering Technology
Authors: Wei Ling Ling , Yang Wei
Published: September 2014

It is analysed and summarized the China’s big ten network media events in recent years, and concluded the commonness among the network hot events and the causation that attention by netizens. According to the characteristics of the events, it is extracted keywords, record and statistics the appearing and propagation characteristics of the events in the network, and researched the optimization method for keywords. Finally, the keywords entered in network community warning and tracking system, mainly distributed in the router, the application server, terminal software, and the corresponding application is Forum、network access、email、instant messaging and online community, then conduce to the community network opinion supervision and management, in order to maintain social stability.
Research on Temperature Control System for Vacuum Annealing Furnace Based on Neural Network-PID
Authors: Zhang Nai Lu , He Li , Huang Wei , Liu Xin , Li Li Bo
Published: September 2014

Vacuum annealing is an important part in rare metal tube production, accurate control of the annea ling temperature has enormous influence on the quality of tubes.According to the technological characteristics and temperature control requirements of the vacuum annealing furnace ,a high precision temperature control system was built based on IPC, intelligent temperature controller and thyratron transistor power-regulator.The neural network-PID strategy was proposed to control temperature online through OPC interface, which realized accurate control and automatic detection of the whole process of annealing temperature. Field data indicates that this system has realized the accurate control of the vacuum annealing temperature, effectively improves the quality of rare metal tubes and has extensive application value.
Research on Database Front-End Applications Exploration Based on Powerbuilder
Authors: Huang Lei , Wang Yan , Ni Zhen Tao
Published: September 2014

This paper introduces steps and techniques for the front-end database applications in Powerbuilder (PB), gives relevant script fragments that are for creation of transaction objects of communication between PB clients and database and for definitions of their properties, and analyzes and compares several approaches for PB clients to talk to database and the corresponding script fragments.
Research on the Implementation Methods of Security Management of Distributed Database Application System
Authors: Zheng Na , Gao Yuan
Published: September 2014

A method for implementing privileged management in security management based on role base access control model (RBAC2) is proposed. The idea is creating the users security information space and the security information space for the data base management system separately. The rule and method are given for implementing the mapping from the former onto the latter. The structure of the system for implementing the security management system in the client/server environment is also presented. The adoptability, easy usability and maintainability are primary characters of the method.
Research of Music Retrieval System Based on Emotional Music Template
Authors: Wang Xiao
Published: September 2014

Traditional music retrieval system based on text information description can't meet people's demand for intelligent retrieval, on which basis content-based music retrieval method came into being. Emotional needs are introduced into retrieval and related researches are done to music retrieval method based on the emotion. This paper first constructs music emotion space to obtain the user's emotions; and then proposes emotional music template library through the study of the definition of emotional music model to meet users emotional needs matching template; Finally, based on this, advances the music retrieval system model based on emotional music template, trying to explore a kind of effective retrieval method based on emotion.
Modeling and Analysis of NOTAM Distribution Services Based on Petri Net
Authors: Hu Jing , Song Xue Yan , Sun Ji Zhou
Published: September 2014

NOTAM (Notice to Airman) is a notice distributed by means of telecommunication which concerned with the establishment, condition or change in aeronautical facility, service, procedure or hazard. The timely knowledge of NOTAM was essential to persons who concerned with flight operation. In order to improve the transmission efficiency of NOTAM, ensure the timeliness and effectiveness of NOTAM distribution service, this paper applied the publish/subscribe model to the NOTAM distribution service, and modeling it based on petri net, analyzing the properties with boundary and conservation of the model using the P-invariant analysis method. Which verifies that the NOTAM distribution service model is correct and effective.
Research on Network Video Data Acquisition and Analysis Based on Big Data
Authors: Ji Hai , Cao San Xing
Published: September 2014

With the development of Internet technology and communication technology, high quality Internet video has become an important dissemination of media information, and also become an Internet service used by more and more users. Analysis of online video user behavior will have great significance for the development of online video platform and user monitoring public opinion. Big Data as a new solution for data processing, to be able to do a wide range of mass data processing and mining. This paper combines with the Big Data technology and systematic expounds data acquisition technology for mass data related to network video. And a brief overview of the principle of Hadoop platform for data analysis.
The Integration of Sports Information in Personalized Network
Authors: Zhao Huan , Wu Qiu Hong , Zhao Jian Bo
Published: September 2014

Digital information service is an important topic, which is based on the personalized information service, therefore, this paper takes individualized information service and information integration as the starting point to analyze and discuss the reason of information integration. Moreover, it takes the individual requirements of users as the basis according to the user-oriented principle, putting forward the concept of personalized information integration.
Design and Implementation of Large-Scale Temperature Stability Control System
Authors: Liu Wen Lai
Published: September 2014

large-scale temperature stability control method is studied in this paper. In the process of large-scale temperature control, the stability of control is a very important indicator. To this end, this paper proposes a large-scale temperature stability control algorithm based on hierarchical control method. Balance equation of large-scale temperature stability control is created for the effective transmission of control data. According to the constant control theory, large-scale temperature stability control system design is achieved. Experimental results show that the proposed algorithm for large-scale temperature stability control system design, can greatly improve the stability of control, and get the satisfactory results.
The Study on Educational iOS and Android Application Program of Sports Skills and Knowledge
Authors: Liu Ning , Yang De Yu
Published: September 2014

Nowadays, the mobile Internet has become the mainstream technology which change the way people get information and achieve social communication, physical education teaching and corresponding teaching methods can also use the most fashionable mobile platforms and technology of the Internet. In order to realize the sports teaching material application programming, we will with the mobile Internet and intelligence terminal as a platform to develop a series of sports skills and the education of knowledge iOS and Android applications. Using professional video production means to produce the technical action and the points of knowledge involved. And the athletes from the project field to finish the action demonstration.
Design and Implementation of Computer Equipment Management System Based on Oracle Database
Authors: Jiang Xiao Ming
Published: September 2014

At present, the database application is deeply to each industry in China, the database system responsible for the storage and information management tasks focus on the store a lot of data leakage or damage, it will be for the enterprise and the country caused heavy losses. With the increasingly fierce market competition, modern enterprises are facing tremendous pressure of competition, talent, technology, equipment to become the three key factors in the development of enterprises. Among them, as the enterprise one of the most important assets of enterprises to realize the computer equipment information management, the normal production is the guarantee of enterprise, is the enterprise to raise the benefit.
Multiple Remote Intelligent Temperature Control System
Authors: Ma Shi Jie , Shao Chang You , Fan Jian Jun
Published: September 2014

Greenhouse temperature control is a key factor which affects crop growth, and the traditional way of temperature regulation already cannot satisfy the requirements of modern greenhouse: high precision, rapid acquisition and response. The 32-bit EasyARM1138 single chip microcomputer is taken as the main control chip to implement multiple canopy temperature acquisition and control. AT89C52 single chip microcomputer is applied as assisted control chip to implement single greenhouse temperature control. DS18B20 digital temperature sensor is used to collect temperature information in the greenhouse. Through buttons, LCD monitor, GPRS SMS alarm module, and light alarm system with LED and buzzer sound to realize human-computer interaction. Through analyzing of the present condition of greenhouse environment, greenhouse temperature parameters are adjusted to achieve the requirements of crops growth and cultivation development to provide the most suitable temperature environment for crop growth, and increase crop yield and quality.
A Network Security Risk Computation Approach Based on Attack Graphs
Authors: Wang Chao
Published: September 2014

At present, with the rapid development of computer technology and network communication technology, and the Internet computer network application is increasingly wide and deep. Explore the scientific, reasonable and practical calculation method of the network security risk has become a hotspot in the research of network security, and a lot of research results have been reached. But because of the complexity of the network security risk calculation, there are still many challenges. Based on the shortcomings of the traditional network security risk calculation method, this paper mainly studies network security risk calculation method based on attack graph.
Application of Computer Network of Virtual Reality in Design of Art
Authors: You Juan
Published: September 2014

The 21st century, which is called times of information or E-times by people, is a digital era based on electronic computer. Computer art design is an emerging comprehensive science, art design innovation applying computer and computer software as well as other instruments as main tools. Computers applied in design innovation, as significant tools in a new technology revolution, are more advanced than traditional design tools in terms of design technique, visual effect, working efficiency, work storage and medication.
The Frame Study of Translation System Design Based on Database Management
Authors: Liu Li Hong , Meng Fan Jun , Lei Ying , Sun Yang , Mu Jia Qing , Zhu Zhi Lu , Yan Ye , Zhang Yun He , Sun Lin , Lv Zhi
Published: September 2014

In this paper, a database management system as the core, to study the system design framework for the translation industry database of information integration and database management theory proposes that the translation of translation technology industrial development and improving management level.
Network Topology Discovery Algorithm Based on OSPF Link State Advertisement
Authors: Shen Zhe Jian , Ge Yun Sheng
Published: September 2014

In large scale network, the problem that network in an area topology accurately be discovered should be solved. The traditional network discovery algorithms mainly use ICMP and SNMP. But these two algorithms allow routers or other devices to send request packets to other devices. It may cause the low utilization rate of network. However, OSPF routing protocol, when it exchange routing tables, it will send LSUs to other routers and receive them from the remote routers. According to analyzing the LSAs, which are encapsulated in LSUs, we can obtain the network topology. We use GNS3 to simulate OSPF environment. Experiment shows that this algorithm can obtain the network topology rapidly and accurately.
Information Management System of Metrological Evaluation Based on SSH Framework
Authors: Zhang Sen , Zhu Jiang Miao , Qin Yu Hui , Qu Ling Ling
Published: September 2014

The paper developed an information management system of metrological evaluation based on the SSH framework, in order to further standardize the information management of evaluators, and a more stable and accurate information management of evaluation tasks and evaluators, also improves the working quality and efficiency of management center. The more important is making the assignment of evaluators open and objective. This information management system is based on the SSH J2EE platform application framework, in combination with the use of the MySQL database, it adopts JAVA programming technique and B/S development mode. The information management system of evaluation has realized the function of the adding, deleting, revising and querying of information of evaluators and evaluation tasks. In addition, it also has realized an objective and automatic selection of evaluators, which effectively improves the quality and efficiency of management center.
Design and Implementation for the Upper Computer Software of the Two-Dimensional Turntable System Based on MFC
Authors: Xiang Li Yan Ni , Yang Xiao Jun
Published: September 2014

This paper mainly introduces how to design an upper computer interface for two-dimensional turntable under the environment of VS2010 using MFC, in order to provide a comfortable and easy operating environment for user. These technology are amply analyzed such as the serial communication, the curve drawing of motor speed, the display of hand wheel schematic. The PC software has the function of management and control of the two-dimensional turntable which is verified by experiments.
Research of Anti-Collision Method in Robot Path Planning Process
Authors: Ma Tao Hua
Published: September 2014

In the research of robot path planning anti-collision method, with the traditional algorithm to plan robot path, the planning processis single, cumbersome and inefficient. To this end, a mobile robot path planning method based on potential field genetic fusion algorithm is proposed to establish the relationship model of different force in artificial potential field, and calculate attractive and repulsive forces applied on robotics in the artificial potential field, according to the attractive and repulsive forces to complete the anti-collision handling in route planning process. Experimental results show that the improved algorithm for anti-collision process in robot path planning, can effectively improve the computational efficiency for the anti-collision, expand its application field and enhance the technicality of anti-collision.
A Remote and Unified Software Automated Deployment Platform
Authors: Zhao Jian Ping , Liu Xiao Yang , Wu Hui Hua , Chen Xiao Lin , Yang Li , Zhang De Hua
Published: September 2014

According to the problem that the current deployment methods and tools lead to complex control of software version, simple and repeated labor, and low work efficiency for the distributed software system containing a variety of applications deployed and upgraded on computers of different hardware configurations and operating systems, a remote and unified software automated deployment platform is designed by studying software automated deployment platform and key techniques of software information description language, software intelligent deployment algorithm and multi-agent communication mechanism. The experiment shows that the deployment platform can automatically detect software deployment conflicts, adjust conflicts, make collaborative decisions of software deployment, realize the unified and intelligent deployment at last.
Design and Implementation of Multi Granularity Access Framework Based on AOP
Authors: Wang Qi , Wang Yong Bin
Published: September 2014

Nowadays Role-Based Access Control (RBAC) is widely used in privilege management framework. In the paper, by the multi – granularity, it realized the effective management with system privileges and proposed the formal description for the concepts and operations. Meanwhile, aiming at the codes mixed problem to permissions analysis logic and business logic, combined with the Aspect Oriented Programming (AOP) design method, the realization of normal privilege management framework is given so as to achieve the decoupling of certification authority with business logic and improving the framework reusability.
A Smart Grid Data Global Placement Strategy Based on Cloud Computing
Authors: Li Yu Kai , Xin Di , Liu Hong Gang
Published: September 2014

Cloud computing is a typical network computing model.Large-scale network applications based on cloud computing presents the characteristics and trends of distributed, heterogeneous data-intensive.Smart grid is a complex system running a real-time online.It is a data-intensive applications.How to effectively integrate multiple data centers in the smart grid and let them work together in the cloud computing environment is a question.And how to make rational distribution of data in the smart grid is also a question.Therefore, we propose a global placement strategy based on genetic algorithm.And we give the data placement scheme for solving on data-intensive applications.Through simulation software CloudSim, we conducted simulation experiments and analyzed the effectiveness of the program.
Human Error Simulation of Manufacturing Cell Based on Human-Machine Integrated Model
Authors: Zhao Dong Fang , Zhang Xiao Dong , Gong Chen Jian , Wang Cui Cui
Published: September 2014

In order to analyze human error how to have effect on manufacturing cell and improve manufacturing efficiency from operators’ point of view, manufacturing cell human error simulation model based on the principle of human-machine integrated is proposed firstly. The realized process of manufacturing cell simulation model is detailed described. After that, human behaviors in manufacturing cell were analyzed and realization mechanisms of main model were introduced. Finally, applied above model and theory in a motorcycle manufacturing cell and simulated various human errors. The simulation result shows that human errors have significant effect on evaluating manufacturing cell performance and the influence degree increased along with the possibility of human make errors. As a result, different production mode should be adopted according to different configuration scheme of organization and personnel stability.
Research on Data Aggregation Application Based on Mashup
Authors: Cai Man Yi , Pan Bing
Published: September 2014

Recently, the development of electronic commerce has gotten better and better. But the sales tool of e-commerce platforms is not yet mature. In this paper, a sales tool is implemented by using mashup technology combined with MVC pattern to aggregate data from different data sources, such as gostats.com, k780.com. It can help vendors and develop reasonable sales strategy in the e-commerce, by tracking the IP addresses of the visitors on product pages and display the distribution by calling Google Map API.
Detecting Overlapping Communities with MDS and Local Expansion FCM
Authors: Li Lin , Xia Zheng Min , Li Sheng Hong , Pan Li , Huang Zhi Hua
Published: September 2014

Community structure is an important feature to understand structural and functional properties in various complex networks. In this paper, we use Multidimensional Scaling (MDS) to map nodes of network into Euclidean space to keep the distance information of nodes, and then we use topology feature of communities to propose the local expansion strategy to detect initial seeds for FCM. Finally, the FCM are used to uncover overlapping communities in the complex networks. The test results in real-world and artificial networks show that the proposed algorithm is efficient and robust in uncovering overlapping community structure.
Study on Digital Content Representation from Direct Label Graph to RDF/OWL Language into Semantic Web
Authors: Khamis Khamis Abdul Latif , Zhong Luo , Song Hua Zhu
Published: September 2014

An increasing number of publication and consumptions of media data on the social and dynamic web has allowed ontology technology to grow up unpredictable. News agencies, cultural heritage sites, social media companies and ordinary users contribute a large portion of media contents across web community. These huge amounts of media contents are generally accessed via standardized and proprietary metadata formats through semantic web. But nearly all cases need specific, standardized, and more expressive methods to represent media data into the knowledge representation paradigm. This paper proposes the proper methods to express media ontology based on the nature of media data. At first RDF graph representation model is used to show the expressive power of domain classification with direct label graph concepts. Secondly, events and object class domain are used to express relational properties of media content. Finally, the events and object class domain is expressed into RDF/OWL language, as preferable and standardized language to represent media data in the semantic web.
Research on Vehicle Networking Transfer Channel Based on MAC Safety Information System
Authors: Zhou Ying , Ren Tiao Juan , Wang Zhang Quan , Liu Yao Lin
Published: September 2014

Amount of cars in China increase rapidly with the fast development of social economy. Traffic jam and accidents have been social problems. Vehicle networking technology is born at the right moment for improving traffic situation and realizing city traffic intellectualization. Wireless access technology has become research hotspot in recent years under the vehicle networking environment. It is of great importance for wide use of vehicle networking to study rational and feasible safety information transmission plan. How to lower time delay of information and data redundancy is a big problem that has to be solved. This paper studied the multi-channel transfer of safety information in MAC layer to opti mize time delay and reliability of information transfer, which have certain value on the development of multi-channel transfer technology of vehicle networking safety information.
Application of Neural Network in Network Intrusion Detection
Authors: Yang Zhong , Du Hua
Published: September 2014

In this paper, we combined the clustering algorithm and neural network algorithm, proposes a new FORBF neural network algorithm based on FCM and OLS, and apply it to the research of intrusion detection system. The simulation results show that, the algorithm has satisfactory performance.
The Study of the Ontology and Context Verification Based Intrusion Detection Model
Authors: Guo Guang Feng
Published: September 2014

During the 30-year development of the Intrusion Detection System, the problems such as the high false-positive rate have always plagued the users. Therefore, the ontology and context verification based intrusion detection model (OCVIDM) was put forward to connect the description of attack’s signatures and context effectively. The OCVIDM established the knowledge base of the intrusion detection ontology that was regarded as the center of efficient filtering platform of the false alerts to realize the automatic validation of the alarm and self-acting judgment of the real attacks, so as to achieve the goal of filtering the non-relevant positives alerts and reduce false positives.
Remote Inspection System Algorithm Research of Wireless Base Station
Authors: Bai Min Dan , Dong Yue
Published: September 2014

In this paper, we apply the technology of Internet of things in wireless base station inspection. This actualize the long distance information acquisition about base station equipment and environment, actualize the real time feedback about hitch and alarm of station equipment, and improve stabilization of communication system and efficiency of inspections. A new remote control method based on SMS interception is proposed aiming at the problem that remote control must be connected to internet. Also a new anti-collision algorithm for simple labeling system is introduced aiming at the problem of multi-tag RFID conflicts. Finally, users can realize the remote control and inspection as long as they connect with internet.
FMPC: A Fast Multi-Dimensional Packet Classification Algorithm
Authors: Guo Zhen Hong , Li Lin , Wang Qing , Lin Meng , Pan Rui
Published: September 2014

With the rapid development of the Internet, the number of firewall rules is increasing. The enormous quantity of rules challenges the performance of the packet classification that has already become a bottleneck in firewalls. This dissertation proposes a rapid and multi-dimensional algorithm for packet classification based on BSOL(Binary Search On Leaves), which is named FMPC(FastMulti-dimensional Packet Classification). Different from BSOL, FMPC cuts all dimensions at the same time to decompose rule spaces and stores leaf spaces into hash tables; FMPC constructs a Bloom Filter for every hash table and stores them into embedded SRAM. When classifying a packet, FMPC performs parallel queries on Bloom Filters and determines how to visit hash tables according to the results. Algorithm analysis and the result of simulations show: the average number of hash-table lookups of FMPC is 1 when classifying a packet, which is much smaller than that of BSOL; inthe worst case, the number of hash-table lookups of FMPCisO(logwmax+1⁡), which is also smaller than that of BSOL in multi-dimensional environment, where wmax is the length, in bits, of the dimension whose length is the longest..
Structural Analysis and Heat Transfer Performance Test of Abrasive Tool with Heat Pipe
Authors: Sun Tao , Li Fang , Zhou Xiao Qing , Ma Fei
Published: September 2014

Heat pipe has excellent conductivity of heat and diversity of structure, so it can be used in machining which can decrease or avoid using the cutting fluid. In this paper, the abrasive tool with rotating heat pipe was designed. To validate that the abrasive tool with heat pipe can safely and steadily grind materials, the structure of abrasive tool was finite element analyzed which included static analysis. Furthermore, the heat transfer performance of heat pipe was tested. The results indicated that heat pipe has certain cooling impacts relative to no heat pipe in machining.
Finite Element Numerical Simulation Research on Fractured Horizontal Well’s Productivity
Authors: Liu Meng Xia , Li Ju Hua , Zhang Lei
Published: September 2014

Conventional productivity research method of fractured horizontal wells doesn’t meticulously describe the seepage characteristics of the near wellbore area. Based on the similarity of seepage field and temperature field, and ANSYS finite element software platform, this paper conducts the simulation calculation of the fractured horizontal wells’ productivity, shows the flow of near wellbore area, and analyzes the factors affecting the productivity on fractured horizontal well by using the heat flow field model in the ANSYS software platform. The results show that the larger the angle between fractures and horizontal wells, the higher the production. It is necessary to place the fractures stagger to the greatest extent, and the fracture spacing should be extended as much as possible in actual production. This optimization design of fractured horizontal well has a certain role in guiding.
Review on Application of Virtual Reality in the Physical Simulation
Authors: Cai Zheng Jie
Published: September 2014

VRT (Virtual Reality Technology) can simulate the real world dynamically by computer hardware and software to construct and experience artificia1 world.It can produce the dynamic environment to answer synchronically the gestures and language orders of users and make users and artificia1 world construct the synchrona1 and interactive relationship.In recent years,VRT has been used widely in the field of sports such as diving,gymnastics,trampoline,weightlifting,golf,basketball and skiing,especially at diving and trampoline.1. VRT (Virtual Reality Technology)
An Efficient Secure Multichannel Traffic Management Scheme in 2.4 GHz Home Automation Network with IoT Functions
Authors: Wei Min , Wang Ping
Published: September 2014

A home automation system integrates electrical devices in a house with each other. In this paper, an efficient secure multichannel traffic management scheme for wireless home automation networks with IoT (Internet of Things) functions is proposed. The mechanism includes a channel resource optimization scheme by the centralized channel assignment algorithms and an intrusion detection scheme for security enhancement with the traffic management. We evaluated the performance of the mechanism by using the wireless data measured on real wireless home networks. The simulation results show that the scheme can effectively manage the multi-channel status of the networks and detect the intrusion attacks, which improve the overall network performance.
A Circuit Model of the Memcapacitor
Authors: Wang Wei , Xu Hui , Hou Yue Wei , Liu Hai Jun
Published: September 2014

Since the manufacture of memcapacitor is complicated and memcapacitors are not commercially available yet, the memcapacitor models are of importance for the research on memcapacitor characteristics and its application. Based on the analysis of the mathematical model of the memcapacitor and its typical characteristics, the memcapacitor model is designed. Some simulation is done to validate the function of the proposed circuit model.
Titanium Oxide Memristor Based Digital Encoder Circuit
Authors: Hou Yue Wei , Xu Xin , Wang Wei , Tian Xiao Bo , Liu Hai Jun
Published: September 2014

Memristors have the ability to remember their last resistance and quickly switch between different states, such characteristics could make logic circuits simple in structure and fast in boolean computations. A kind of digital encoder circuit utilizing titanium oxide memristors is proposed. A logic NAND gate which acts as key part in the circuit is designed. The works in this letter also provide a practical approach for designing logic gate circuit with memristors.
Application of Digital Coordinate Transformation to a New Posthole Broadband Seismometer
Authors: Peng Chao Yong , Xue Bing , Yang Jian Si
Published: September 2014

Most seismological instruments recording ground motion use three sensors oriented north, east, and upward. In this cardinal configuration horizontal and vertical sensors differ in their construction because of the gravitational acceleration affecting the vertical sensor. In order to solve this inconsistence, we have developed a new posthole broadband seismometer with Galperin’s configuration. In this arrangement three identical sensors are also positioned orthogonally to each other but are tilted at the same angle to the vertical axis. We have presented the nominal coordinate transformations used to derive the differential output signals X, Y, Z from the cube-corner-oriented sensor output signals U, V, W, including four types of corrections: orthogonal correction, sensitivity correction, tilt correction and orientation correction. In addition, the hardware circuit for the coordinate transformation matrix is also described in details.
Research and Design of Asynchronous FIFO Based on FPGA
Authors: Liu Bing Qi , Liu Ming Zhe , Yang Gang , Mao Xiao Bo , Li Huai Liang
Published: September 2014

In this article, a design method of asynchronous FIFO memory based on FPGA is put forward. With FPGA as the core controller, We adopt Verilog HDL and top-down design method to build a top-level module design and also analyze the mark logic of asynchronous FIFO and the elimination of semi-stable state under Quartus II development platform. Besides, with the application of Gray code conversion technology, not only the reliable transmission of data is guaranteed but also design efficiency is improved. Through contrast experiment analysis and simulation test, the validity and reliability of asynchronous FIFO memory are verified, meeting the basic requirement that FIFO can hold more enough data without spillovers despite the fullness of data.
Simulation Design of Automatic Control System of Scenic Spot Based on Digital Electronic Technology
Authors: Zhang Jian Xing
Published: September 2014

The main purpose of low-carbon is to effectively alleviate the contradiction and structured development between resources and energy, human and social environment in the developing process of human. This article focuses on low-carbon protection of current tourist attractions and analyzes the structure of the low-carbon resource carrying system of tourist attractions. Based on PID control thought, this paper establishes carrying capacity analysis model and does the K means value clustering algorithm optimization of tourist attraction’s carbon cluster simulation system using computer simulation technology. Through comparative analysis, this paper proposes low-carbon protection simulation warning method of the scenic spots. This method can predict low-carbon carrying capacity of resources and make warning and the effect is significant.
Synchronization of Hyperchaotic Memristor-Based Chua’s Circuits
Authors: Huang Hai Long , Peng Yan , Huang Jun Jian
Published: September 2014

This paper further investigates the problem of synchronization of hyperchaotic memristor-based Chua’s circuits. An active control method is employed to design a controller to achieve the global synchronization of two identical memristor-based systems. Based on Lyapunov stability theory, a sufficient condition is given to guarantee the stability of the synchronization error system.
Linear Motion Control of an Underactuated Spherical Mobile Robot
Authors: Zhan Qiang , Chi Xing , Xi Xi
Published: September 2014

Due to the nonholonomic and underactutated properties of spherical robot, to realize its steady motion control is usually difficult. This paper presents a linear motion control method for an underactuated spherical robot. The linear motion dynamic model of the spherical robot is deduced with Euler-Lagrange method, which is a second order, nonlinear differential system with two coupled variables. Without any linearization a single-input multiple-output PID controller to realize the position control and pendulum angle control simultaneously is designed. Simulation results about the position stabilization and path tracking control are provided separately to show the control effects of the proposed controller.
Optimal Substation Locating and Sizing Based on Improved Weighted Voronoi Diagram and Genetic Algorithm
Authors: Miao Pei Qing , Meng Qi Bin , Li Yue , Tu Qing Bo
Published: September 2014

Optimal planning of substation locating and sizing is one of the major components of distribution system planning projects. In this paper an approach for optimal locating, sizing and determining the power supply areas of substations using Improved Weighted Voronoi Diagram and Genetic Algorithm (WVD-GA) is presented. For rational power supply areas, variable weights and fixed weights are introduced as new concepts of weighted voronoi diagram to adjust the weights dynamically by considering substation characteristics and load density distribution. And an algorithm based on Cellular Automata (CA) for creating weighted voronoi diagram is designed, which greatly improve the performance of the creating process. The results show the efficiency and capability of the proposed method.
Optimal Design of Transmission Line Route Based on GIS
Authors: Wang Yu , Huang Wei , Li Yue , Tu Qing Bo , Tain Xin
Published: September 2014

Transmission line route reflects the geospatial constraints on the grid. Environmental factors affecting the power transmission line route design are diverse and complex. This paper studies the method based on GIS (Geographic Information System) and Dijkstra algorithm. Establish environmental factors hierarchical model of transmission line route design using IAHP and gridded map and obtain each grid’s weight. Take into account weight of each grid’s environmental factors and number of the corner in order to build the branch weights of Dijkstra algorithm. After that the optimal route can be obtained using Dijkstra algorithm.
A Control Method to Suppress Resonance and Improve Current Quality for Inverter System with LCL Filter
Authors: Lin Yong Peng , Tao Shun , Xiao Xiang Ning , Wu Mei Rong
Published: September 2014

The LCL filter is easy to resonate, especially in the new energy power system with multiple inverters. The LCL filter resonant formulas are derived in this paper and a novel double closed loop control strategy combing with the structure of the LCL filter was proposed at the base on feedback of capacitor current as a result. In the control system, the inner loop feedback the first differential voltage of filter inductor at the grid side to damp the resonance and nature of first differential voltage of filter inductor is explained; the grid current outer loop achieves direct control of the grid current for high power factor and utilization efficiency. The simulation results show that the grid-side inductor voltage differential feedback control have a better current control effect both in the condition of the normal power grid voltage and distorted grid voltage, and the fluctuations of power and dc voltage are reduced.
Charge and Discharge Protection Circuit of a Mobile Power Supply Improvement
Authors: Li Shi Guang , Wang Li Zhi , Gao Zheng Zhong , Zhang Xiao Jing , Zhao Li Na
Published: September 2014

There are many kinds of mobile power supply, in this paper, aiming at the existing mobile power cannot be automatically continued charging problem, an automatic charging and discharging circuit design, and put forward the improvement circuit corresponding to the common lithium battery over-voltage and over-current protection, battery monitoring problem. The widespread use of application of STC15W401AS, SX2105, DS2762 chip as the core device, with the corresponding peripheral circuit, provides a reference for the application of charge power supply protection circuit of lithium ion batteries based on SCM system.
Routing Selection for Communication of Power System Wide-Area Protection Considering Backup Path
Authors: Sun Xiao Wen
Published: September 2014

Wide-area protection is extensively used in power system. The fundamental of this protection scheme is the communication system and its routing selection. The wide-area communication network requires not only high reliability, but also rigid latency limit. To solve this problem, a routing selection method is proposed, considering availability and latency. A backup path is also taken into account to rebuild connection in case of communication path failure. With the case study, the method is proved to be simple and accurate. It can provide the join with the most reliability, on the premise of proper latency.
Design and Simulation of Arrayed Waveguide Grating for Miniature Raman Spectrometer
Authors: Xu Ying Chao , Wang Qing Na , Zhu Wen Zhang
Published: September 2014

Arrayed waveguide grating (AWG) is a very popular dense wavelength division multiplexing (DWDM) device, which is produced in the field of optical communication technology. Instead of traditional grating and lens spectral system, AWG is used as the spectral chip in miniature Raman spectrometer. It’s quite important for miniature Raman spectrometer in miniaturization and low cost. This paper analyzed the basic principles of AWG device, and introduces the insertion loss, crosstalk and phase error performance parameters, also focuses on the specific technical requirements about wavelength, optical channel number, phase error, wavelength resolution and bandwidth, which are applied in miniature Raman spectrometer. Some new researches and a series of related simulation have been made, finally won the 1 * 40 channels AWG spectral chips, with wavelength range of 880-920 nm, insertion loss of center wavelengths is better than-0.9 dB.
The Electromagnetic Parameters' Impact of λ/4 Type Dielectric Absorber on Absorbing Properties
Authors: Zhao Hui Chao , Hao Wan Jun , Yi Ying Ying , Dong Yi Feng , Yu Xin Dan
Published: September 2014

This paper studies electromagnetic parameters' impact of λ/4 type dielectric absorber on absorbing properties. Calculation shows that the maximum absorption amount is corresponding to specific values of K and R when absorber's permittivity is stable, when the thickness of material is determined and the real part permittivity is increased, the absorption peaks move to lower frequency and reduce the distance between adjacent peaks, while the imaginary part of permittivity and resistance of membrane resistance only affect absorption peaks' amount but have no effect on the peaks' position. Accordingly, it is reasonable to adjust the material's electromagnetic parameters according to the above rule when the high-performance λ/4 dielectric-type absorber is prepared.
Design of Programmable DC Power Supply Based on ARM
Authors: Wang Xu , Chen Heng , Wang Rong
Published: September 2014

This paper designed a DC programmable power-supply system based on ARM Cortex-M3 as the main controller. The main power module is supplied with PAF600 from TDK-lambda. This system uses 12 bit serial high speed chip analog-to-digital conversion from TI (Texas Instruments) and 12 bit parallel high resolution analog-to-digital conversion chip from AD (Analog Devices) for the signal of the power supply system of acquisition and adjustment. The system not only can use the encoder and the keyboard to adjust and control, but also can through the RS-232 interface apply the PC software to send command to do that. The signal of power supply system can realize software over-voltage protection and over-current protection function by high speed DAQ (Data Acquisition) ,the rapid data processing of ARM and the least squares curve fitting. This system runs steadily and reliably and also has high adjusting precision and simple operation. The best is to read these instructions and follow the outline of this text.
Adaptive Sliding Mode Output Synchronization Tracking for Hyper-Chaotic Lü System Based on Adaptive PWL Filters
Authors: Zhao Yi Bo , Zhang Xiu Zai , Sun Xin Yu
Published: September 2014

In this work, an adaptive sliding mode control method is presented to achieve output synchronization tracking for the uncertain hyper-chaotic Lü system. An adaptive piecewise linear (PWL) filter is used to identify the uncertain hyper-chaotic system. Base on the identification results, an adaptive sliding mode controller is designed to obtain output synchronization tracking for the hyper-chaotic Lü system. The convergence condition of the adaptive PWL filter is derived based on the Lyapunov theorem. Simulation is done to verify the effectiveness and correction of the proposed identification and synchronization tracking control method.
Steam Generator Water Level Intelligent Control of PWR Nuclear Power Plant Based on Feed Water Regulation
Authors: Yang Xu Hong , Yang Jian , Wang Ya Nan , Xue Yang
Published: September 2014

Water level control of the steam generator is an important indicator of the safe operation of nuclear power plant. The traditional PID controller system has the disadvantages of large amount of overshoot, long adjusting time, etc. Steam generator has complex, nonlinear and time-varying characteristics. This article proposes the adopting the BP neural network intelligent control algorithm. The simulation experiments results indicated that: Comparing with traditional PID control it has smaller overshoot and shorter adjustment time, more ideal control effect c.