bluuebunny/crossref_metadata_2025 huggingface dataset:
Constructing Network Learning Platform Based on the Influencing Factors of Mobile Learning - A Case Study on Learning Cell
Authors: Xu Bi
Published: December 2014

Communication Technology and Network Technology are the key factors to M-learning, and at the same time constraints. This study combines the features of M-learning in digital, in multimedia, networking, intelligent and happening whenever and wherever, analyzes key factors affecting M-learning based on Communication Technology and Network Technology, and expects to find a basis for Network Platform’s design and development.
An Empirical Study on Imbalance of English Teaching Online
Authors: Liu Wei , Yu Feng , Lin Hao
Published: December 2014

National Level Quality Course Project in Higher Education aims at improvement of learners’ all-round English abilities and English teaching quality in universities and colleges in China by sharing free fine teaching information. An empirical study of National Level Quality Courses shows Online English teaching in Chinese colleges and universities is out of balance in information distribution, teaching guidelines, teaching modes, teaching methods and teaching/learning platforms between College English and English for English Majors.
The Design of Stadiums Operation and Maintenance Management System Based on the ASP.NET
Authors: Li Yu Ming
Published: December 2014

In the era of rapid development of information technology, how to make the management effective, efficient, cost-effective and management informatization is an inevitable trend. In this paper, firstly introduce the overview of the Stadiums operation and maintenance management system based on the ASP.NET; secondly research the operation and management system of stadium; and finally based on the first and second analysis of the operation and maintenance management system, put forward the specific Design and implementation of the operation and management system of stadium.
Application of Virtual Reality Technology in Agriculture
Authors: Duan Yun Peng , Fu Hai Tao , Zhu Li
Published: December 2014

Virtual reality (VR) is a hot spot of technology at home and abroad in recent years, is an integrated and information science. Is with the aid of computer technology and the hardware equipment, the realization of a kind of people can be felt by touch the olfactory audio-visual means virtual dreamland. The technology has been used in industry, commerce, education, medical, military, entertainment and so on various areas to work, this article mainly from the aspects of agriculture, introduced virtual agriculture, virtual plants, and virtual technology application in agriculture.
CI and Web Design in Legacy Brand Enterprise
Authors: Qi Yue , Qi Hao , Zhou Xu Dan , Li Shao Jian
Published: December 2014

In today's information society with fierce market competition, the image of the well-known enterprises develop with the eras and adapt to enterprise development process, strengthening moderately, strengthening image planning design and subsequent modification are very necessary. Enterprise CI image and the spread of web design have become corporate image strategies, web image recognition design must create the corporate image which can represent the enterprise image, business strategy of the brand image. This paper analysis web page design from the enterprise CI brand characteristics, representing beauty and harmony, and have a visual experience.
Research and Maintenance of Computer Network Security
Authors: Sun Ning Ning , Ma Li Hua
Published: December 2014

This paper of University Library in the computer network security situation analysis, proposed the threat factors of current university library computer network security faces, proposed the university library computer software maintenance and maintenance measures to ensure the safety of computer network application system in the library.
Design and Implementation of Student Information Management System Based on Java Technology
Authors: Ouyang Gui Xiu
Published: December 2014

This paper analyzes the present situation of higher vocational college student management work, designs and realizes students' information management system based on Java technology. This paper realizes to insert, query, modify, and delete the students' information. The system improve the efficiency of student information management and promote the informatization construction in higher vocational college.
On Autonomous Learning Mode of Network College English Writing Based on Constructivism
Authors: Wang Ming , Yuan Da Chao , Zheng Xiao Man , Yu Shi Ping , Lao Yi Ye , Huang Xiao Tian
Published: December 2014

College English writing, as one of the most important skills of college English teaching and learning, can reveal the English comprehensive level of learners. The development of computer and Internet creates conditions for college English teaching reform. This paper explores what influence will be caused when students write autonomously under the network environment and probes into a new method of college English writing teaching through studying autonomous learning mode of college English writing based on constructivism.
Design and Implementation of a Network Test System with Dynamically Generated Answer Options
Authors: Zhou Xiang , Ma Ying Ying , Liu Xiao Feng
Published: December 2014

With the development and popularization of technology of computer application, network and database, the network based training exam mode has been widely used in place of the traditional exam based on paper-pencil and book ways for it is efficient, fair, safe and reliable. To against the current lack of network test system design, this paper proposes design ideas to dynamically generated answer options of standardized test. Through improving the database design and optimizing test generation algorithm, a network test system with dynamically generated answer options is designed to effectively promote the effect of learning and training of the candidates.
Design and Development of Self-Help Emergency Device Based on the Android Intelligence Platform
Authors: Chen Xue Yu , Zang Jin , Yang Miao , Wang Wei Ping , Hu Yin
Published: December 2014

LD3320 is a high-performance speech recognition module which is made in ICR company. It can achieve non-specific voice recognition feature of a limited vocabulary. The chip does not require the user for record training, with a identify dynamically editable key words list, we just need to put the key words in the chip, which can take effect immediately in the next recognition. The design on the basis of Android platform, combined with non-specific speech recognition module, Bluetooth technology enables voice control hardware, design of a set of older self-aid devices.
Based on Linux Platform Information Storage and Service Monitoring Network Management System
Authors: Lv Yan Xing
Published: December 2014

The network management system based on WEB has been becoming the current hot spots. The paper discusses the advantages and significance of WBM fully to discuss the possibility of a network management system based on JAVA implementation. Based on the SNMP protocol is proposed based on ARP protocol and network topology search found based on ICMP protocol and topology reconstruction. SNMP access to treatment and MIB information structure and based on the MIB information acquisition. Application server search and real time function and the realization of the corresponding technology such as network service monitoring method. And on the Linux platform, using TOMCAT as a JSP interpreter, information storage, publishing technology and by using XML and JAVA platform compatibility technology is verified to above ultimately proved: the network management system based on JAVA and XML can completely meet the requirements of network management has good feasibility and practical application value.
A Network Troubleshooting Method Based on Dempster Rule
Authors: Zhou Hong Hai , Liu Pei Bin , Jin Zhi Hao
Published: December 2014

In this paper, a new method which is named DRNFD for network troubleshooting is brought forward in which “abnormal degree” is defined by the vector of probability and belief functions in a privileged process. A new formula based on Dempster Rule is presented to decrease false positives. This method (DRNFD) can effectively reduce false positive rate and non-response rate and can be applied to real-time fault diagnosis. The operational prototypical system demonstrates its feasibility and gets the effectiveness of real-time fault diagnosis.
Windows Malware Detection Method Based on the Path IRP
Authors: Zhang Fu Yong
Published: December 2014

Because the IRP (I/O Request Packets) sequences of programs are not identical in different environments in the same operating system, which have a certain influence on the detection results. Through a lot of experiments, we found that the IRP request sequences of programs on the same operation path are consistent. Therefore, the new malware detection method based on the path IRP sequences is proposed. Every single IRP request sequence on the same operation path is extracted, Negative Selection Algorithm (NSA) and Positive Selection Algorithm (PSA) are used for detection. Experimental results reveal that our method outperforms the method which based on IRP sequences in detection rate.
Analysis on the Library Digitization Construction under the Big Data Era of University
Authors: Sun Chang Li , Shi Dan , Guo Dong Mei
Published: December 2014

With the application of the Internet of things and cloud computing technology, a large-scale production, sharing and application data age is gradually open, it will give the technical and commercial to be changed, also will change our way of the life. If the data is stored, it is always a pile of meaningless numbers, but if using the technology to realize data value, analyzes the data from the produce to the mining, finally consumed the entire process, only by making data, to make data services to the public. This paper will use the big data technology to mine, identify, organize and analyze the implied reader behavior in the structured and semi-structured data information, to search for readers of the implicit demand to improve the library service, resources, services, and reader demand and achieve the optimum configuration.
Research on Intelligent Computer Aided Instruction System
Authors: Feng Mei
Published: December 2014

This paper first outline the present conditions of Intelligent Computer Aided Instruction, then elaborate the contents of Intelligent Computer Aided Instruction system, and finally discuss the future development direction of the Intelligent Computer Aided Instruction system.
Research on Data Sharing for College Financial Systems and Digital Campus
Authors: Zhuang Zhen Sheng
Published: December 2014

With the rapid development of Internet technology and wide use of computer, digitalization also gets large growth attributes to the surprisingly fast development of science and technology at college. The data sharing has become the bottleneck of digital campus development between the financial system and the use of digital campus data files. In this paper, we make the analysis financial data of the financial system and the digital campus network data sharing, automated processing strategies, and achieve the financial data subscription, automated data extraction. Combining financial system and informatization together with the purpose of realizing a complete sharing of financial information, we have designed the college financial management system, which includes the subsystems: account management, student fees management, compensation management and so on. This paper also makes firstly introduction of the technology adopted in the system and explain the function of each subsystem.
Research and Implementation of Multiple Interfaces Wireless Mesh Network Routing Protocol
Authors: Liu Fu Mei , Qu Wen Liang
Published: December 2014

In this paper, routing protocols of wireless Meshnet work is studied about implmentation and verification them on platform. Fistly, routing algorithm of a single-interface Mesh network is studied about implementation routing protocols. This Mesh platform can provid us with wireless aceess, video surveillance and some other services. Experiments results demonstrate that the path throughout will deerease rapidly as the number of Hops increases. Because in a single interface Mesh network, all links are working on the same interfaee, which causes serious interference.
Drop Simulation Analysis of a Large Screen Mobile Phone
Authors: Ma Heng Jie , Gao Qiang
Published: December 2014

As the mobile with large screen easily fall damage, in this paper, a finite element model of the mobile phone was built and drop simulation analysis based on ANSYS/LS-DYNA software. The impact force effects on the phone shell, LCD, touch and battery components were studied. The corresponding stress and strain distribution and the acceleration and dynamic characteristics were solved and the dangerous area of the mobile phone was found. Finally the corresponding optimization proposal was put forward. Provide reference for the study and optimization design of structure strength for this type of products.
Data Security Research for Cloud Computing
Authors: Li Qiang , Yang Kui , Ma Li
Published: December 2014

With the popularity of the cloud computing, network technology obtains unprecedented development and revolution. Cloud computing is the direction of cyberspace storage in the computer and internet filed. Big data and multi-dimensional storage and calculation along with the cloud computing. Therefore, internet data security is the key point. For example, based on the cloud environment, the big data transmission and storage requires encryption technology. This article will research the data security of cloud computing, design the service model of data security encryption, and realize data transmission and storage security service of computer and internet cloud environment.
Study on E-Commerce Platform Operation Mechanism in Big Data Environmen
Authors: Xiong Zhong Kan , Wan Pei Zhen , Cai Jiu Ping
Published: December 2014

Big data is one of the important development direction of modern information technology, realizing the sharing and analysis of large data will bring immeasurable economic value, but also has a tremendous role in promoting the social. In the age of big data, unified the data representation, large data processing, query, analysis and visualization are the key problem to be solved urgently. In order to provide a standardized framework construction of the large data service platform, this paper designed a large data service oriented architecture user experience. Secondly, in the aspect of data model, in order to achieve high data service for non structured data, the design of the non structured data model based on subject behavior. In large data service model, algebraic model large data services and their composition was established by using process algebra. In large data service applications, detailed retrieval, process analysis and visualization services, and by improving the retrieval accuracy and efficiency of the service in two aspects of measures to achieve the high data service optimization.
Design and Implementation of JAVA Online Examination System Based on WEB
Authors: Wang Xiao Yan , Wang Wei Jie
Published: December 2014

The online examination system based on Web technology development, adopts B/S model of three-tier architecture and uses ASP.NET technology, AJAX technology JAVA programming language and SQL Server 2012 as database management system On the base of analyzing the requirement of network examination, online examination system was designed uniformly and system adopted genetic algorithm to generate test paper. In the design of examination system, XML technology was combined with database technology, which adopted XML to describe exam papers, played XML technology in the data description and data exchange and display of superiority to improve system performance. In this system, students can take the exam and choose their own learning content to take self-test exercises. When self-test is completed, students can view their own answer situation and the standard answer of these questions; this played a role in promoting students' independent learning.
Effects of a Passive Dynamic Walker’s Mechanical Parameters on Foot-Ground Clearance
Authors: Liu Xin Yu , Zang Xi Zhe , Zhao Jie
Published: December 2014

Unlike human beings, a robot will fall without a sufficient walking foot-ground clearance, which is essential to a success walking. However, to obtain less calculating time and simpler analysis, foot scuffing is ignored in most studies during numerical simulations of passive dynamic walkers which can walk down a gentle slope and are actuated only by their own gravity. So this paper initials a study on the effects of a passive dynamic walker’s mechanical parameters on foot-ground clearance and the results can be used to make a further parameters optimization based on walking stability analysis. A passive dynamic walking model with a hip joint, knee joints, ankle joints and an upper body and a prototype were built and numerical simulations were implemented to analyze the effects of mechanical parameters on foot-ground clearance. Finally, the results were validated in prototype experiments.
Cloud Computing in Three Phase Scheduling Algorithm Based on Service Quality
Authors: Zhuang Yong Long , Weng Xiao Lan , Wei Xiang He
Published: December 2014

Assurance issues for cloud computing’s service quality; propose a hierarchical network topology on the basis of the three-stage scheduling algorithm. The algorithm ensures that each work to be performed can be assigned to the appropriate resources, and can effectively improve the load of each node and reduce the waste of resources. FCFS, SJF, OLB and Min-Min (MM) scheduling algorithm’s simulation results show that the algorithm can not only make the work get the minimum completion time, but also the service node operation achieve the load balancing.
Design and Performance Evaluation of Distributed Virtual Router Based on OpenStack
Authors: Bao Zhen Shan , Wang Bao Ping , Zhang Wen Bo
Published: December 2014

With the booming of Cloud Compute, OpenStack has been more widely used in Data Center, but in tradition deployment of OpenStack, the traffic must traverse network node to get routing decision. So the network node would be a bottle-neck due to the increasing amount of data flow. In order to solve this problem, this paper propose an extensible design, we create a internal virtual router in each compute node, the internal virtual router just can process the East-West traffic in lay2. With the help of distributed router, the East-West traffic can be delivered directly from the source hypervisor to the destination hypervisor, no longer need to traverse the router in network node to get routing decision, Therefore, North-South and East-West traffic don't impact each other anymore. North-South traffic enjoys all the bandwidth of router in network node exclusively, hence reduce the load of the network node. Experiment results show that OpenStack with distributed router has a much better performance evaluation than original OpenStack. This will dramatically increase the total bandwidth, and also bring other advantages.
Analysis and Design of Information System of Community Service Based on Web
Authors: Li Liang
Published: December 2014

Community informationization is an important foundation stone of state informationization. The paper introduces a system of community information on B/S structure in detail. The framework of the system is analyzed. It is important to analyze the structure and main function of the system. Finally, safety tactics of the system is summarized.
The Design of Online Education Platform and its Operation Mechanism Based on MVC
Authors: Chen Jun Ke
Published: December 2014

The paper has discussed the design of online education platform and its operation mechanism based on MVC. This system consists of three subsystems: a subsystem for system administrators to manager, a subsystem for students to learn and a subsystem for teachers to teach. The operation mechanism of the system is also discussed. The designed platform is the application in modem distance education practice. It has great importance to improve teaching techniques and education quality in University. It can be imagined that the application will help promote learning and managing efficiency of the overall society.
Implementation of Android Mobile Terminal Learning Platform
Authors: Lei Yin , Zhong Jia Hong
Published: December 2014

In the mobile Internet era, in order to learn whenever and wherever possible, we design a mobile learning system based on Android platform. With the key technologies introduced, we design the overall architecture, structure layer and system flow of the mobile learning system, and further design some function modules.
Optimization of Multicast End-to-End Delay in Multi-Radio Wireless Mesh Networks
Authors: Kang Yan An , Yan Ai Ping , Xue Gui Xiang
Published: December 2014

Multi-radio wireless mesh network (MR-WMN) is one of the key access techniques in Mobile Internet. However, current 802.11-based MR-WMN is not able to provide low multicast end-to-end delay. To address this problem, we first propose a layered and analytical model by combining overlapping channel assignment with multi-path routing strategies. The proposed model can be used as a guide on multicast design. It decoupled multicast delay into transmission delay in the MAC layer and queuing delay in the Mesh layer based on that it derived a new multicast routing metric that had low end-to-end delay. Second, we prove that finding the minimum global flow interference solution is a NP-Complete problem an<I the relationship between global flow interference and network node densities is distributed in accord with double-Pareto lognormal (dP1N) distribution. Based on these two results, the DCA algorithm is proposed in order to minimum global flow interference which can efficiently reduce the multicast transmission delay in MAC layer. Last, to avoid the best wireless link being congested, we propose the flow adaptive-based MMRA algorithm by making use of the M R-M ED routing metric and the multi-path routing design philosophy, which took local channel congestion into account and can efficiently reduce the queuing delay in Mesh layer. Simulation result and comparison of the common algorithm MCM both show that the proposed model accurately characterizes the multicast delay in multi-radio wireless mesh network and the combination of the DCA and MMRA algorithms efficiently reduce the multicast end-to-end delay.
Research of Encryption Algorithm of Two-Dimensional Barcode Based on Pseudo Fingerprint Feature
Authors: Zhang Ai Li , Li Si Jia , Yu Zhang
Published: December 2014

By using the two-dimensional barcode encryption technology with pseudo fingerprint feature key, an asymmetric, encrypted and anti-fake design of two-dimensional barcode has been implemented. After being processed , the collected fingerprint information is used to set parameters, translated and rotated. With the accomplishment of coding the parameters, datas of pseudo-random fingerprint feature come into being. With the help of the RSA, encrypt the private key which is randomly produced by pseudo fingerprint feature to get a new one. With the new private key,the only information of owners is encrypted, solving the problem of "witness identity" .
A Service Schedule Model in Green Cloud Computing
Authors: Li Jing , Han Qi Yun
Published: December 2014

With the development of cloud computing paradigm, energy consumption becomes a big problem. Green cloud computing requires efficient resource management for the purpose of energy saving. Service schedule is an important part of the resource management to ensure the quality of service. A mathematic model is proposed which can determine service schedule quantity. In this model, taking energy saving and reputation index of service supplier into account, an optimization problem of two targets is simplified under hypothesis in reason. Through numeric calculation and analysis, this paper show there is an optimal point for the advance schedule of service.
The Research of Influencing Factors of Knowledge Sharing in Virtual Community
Authors: Guan Yu Juan , Huang Guang Qiu
Published: December 2014

This paper uses the method of structural equation model to verify relationship trust, self-efficacy and outcome expectations influences effect on knowledge sharing in virtual community. Research results show that relationship trust has a positive impact on knowledge sharing in virtual community; self-efficacy is positively related to knowledge sharing in virtual communities; outcome expectations have positive correlation on the knowledge sharing in virtual community; relationship trust and self-efficacy had positive correlation to the outcome expectations. Finally, according to the empirical results, this paper put forward to promote the incentive mechanism of knowledge sharing in virtual communities, and provide some countermeasures and suggestions for management practice.
The Method and Experimental Research on Seam Tracking and Dual-Beam Laser Welding for T-Type Welding Seam
Authors: Wang Ping Jiang , Wang Xin , Lin Ling , Wu Yang
Published: December 2014

Aimed at the goal of improving the quality and the efficiency of welding for T-type welding seam, This paper put forward a method to track the seam by using the vision sensor. Machine tool main motion trajectory is generated from the numerical model of the parts. The position of two welding torches are adjusted independently based on the machine tool main motion trajectory to ensure the welding precision. Two sets of adjusting mechanism are needed for T-type welding seam. The vision sensor measure the seam and pass the deviation signal to the CNC system. The CNC system adjust the position of the welding torch installed on the cross slide table to reach the goal of seam tracking and dual-beam laser welding for T-type welding seam. Practice shows that this system for T-type welding seam dual-beam laser welding is easy to operate and can improve the quality and the efficiency.
CMOS Image Sensor-Driven Design Based on TMS320DM368
Authors: Zhan Song , Yu Bao Cheng , Wang Chun Mei
Published: December 2014

A structure of video surveillance platform has been set up based on TI's TMS320DM368 (the following referred to as DM368).The driver of CMOS image sensor has been designed ,according to the valid image data read and timing requirements in the CMOS image sensor. A Aptina's CMOS image sensor AR0130 has been adopted. Acooriding its clock configuration, the ranks’ timing control, the output resolution and other design requirements, a method based on the scanning of ranks clock to divide the valid image area has been applied to set parameters for achieving the hardware device driver. The results show that the device can be normal work under the drive, and video signal outputs stable.
Research on Modeling and Simulation of Power Electronic Circuits Based on MATLAB
Authors: Guo Quan , Xu Kun , Sun Fang Yi , Li Xue Qian
Published: December 2014

the example of three-phase bridge controlled rectifying circuit discussed the method of the utilization of MATLAB SIMULINK on the modeling and simulation of power electronic circuits, and gave the simulation result waveform, verifying the convenience, intuition, high-efficiency, high speed, genuineness and accuracy of this method. This method can also make modeling and simulation on quite complex circuits, power electronic conversion system, and electric drive automatic control system. The systematic modeling is very similar to the design process of the actual system. Users can get the simulation results of the system quickly without programming and the deduction of mathematical models of circuits and systems. The analysis on the simulation results can transform the system structure or modify relevant parameters in order to make the system get the required results and performance, which can greatly accelerate the analysis or design process of the system.
Research on the Secondary System Design Method of Smart Substation
Authors: Zhang Zheng Yang , Liu Hai Mei , Yu Hui Qing
Published: December 2014

This paper presents the design of intelligent substation secondary system which is the method to design units of electricity drawing software as a platform to the primary system and the secondary device ICD grid model file for initial design information. Designers carried out a system model configuration of secondary device, performed a virtual terminal connection to generate visual virtual secondary circuit, network interoperability and functional physical wiring diagram which is used to describe the configuration and structure of the intelligent substation secondary system and SCD file and CID is automatically generated into description files. This method provides a visual means of intelligent substation secondary system design and standardization of substation in favor of system integration work, but also conducive to intelligent substation installation, updating expansion and renovation.
Research on Design of BLDCM Controlling System Based on FPGA
Authors: Hu Ling Yin
Published: December 2014

Brushless dc motor is widely used in high electric field because of its simple structure, large power density, excellent speed regulating performance, and low noise characteristics. This paper describes a brushless DC motor real-time control system based on FPGA. The DC motor is controlled by PWM model and control model which simple the circuit; Calculating the rate of motor by determining the impulse width of n. hall sensor signal; Adopting the soft-core processor embedded in FPGA process increment PID arithmetic control, improve the system real time performance. Experimental results show that the hardware and software are reasonable, owning very good reliability and real time performance. The control system's hardware circuit was designed and implemented such as FPGA periphery circuit, drive circuit, current detecting circuit and so on. And the control arithmetic of current loop, position loop and speed loop were designed and the closed loop control of control system in hardware was achieved.
Automatic C Code Generation for Avionics Software Based on VxWorks653 Platform
Authors: Wang Ying , Wang Lei
Published: December 2014

At present, model-driven development method has been gradually applied in safety-critical avionics software to improve reliability and productivity. Existing ARINC653 annex of the Architecture Analysis & Design Language (AADL) is used to model avionic software based on ARINC653-compatible OS, such as VxWorks653 commercial platform. In this paper, a refined C code generation algorithm is proposed to enable automatically generate VxWorks653-runnable code from the AADL ARINC653 models. Finally, a simplified autopilot system example is as a case study to show the validity of our approch.
A Design of Three-Input Low-Power AND/XOR Complex Gate
Authors: Huang Chun Lei , Wang Lun Yao , Liang Hao , Xia Yin Shui
Published: December 2014

For the deficiencies of the existing complex circuit designs, a novel transistor-level three-input AND/XOR logic complex gate with simple and symmetry structure is proposed. HPSICE simulation results show that the proposed circuit has correct operation. Further, in 55nm process CMOS technology, compared with the conventional cell-based cascaded AND/XOR circuit at different operation frequencies, the proposed circuit has a significant improvement at delay, power consumption and power delay product (PDP).
Embedded Arm-Based Control System Design for Automatic Strapping Machines
Authors: Huang Jiang Ping , Wang Zheng Dong , Yu Wen Ze , He Kai , Du Ru Xu
Published: December 2014

A design of an embedded ARM-based control system for automatic strapping machine is described. This control system uses embedded ARM microprocessor as the core processor, which consists of a STM32 ARM chip and other electronic components. It introduces the general structure, the control method and the implementation of the control system in this paper. The system has many advantages, such as simple and reasonable circuit, stable working performance, simple operation, etc.
Detection and Simulation of Power Quality for Grid-Connected Doubly Fed Wind Turbine
Authors: Li Li Sheng , Zhang Shi Dong , Liu He Jin , Ji Xing Quan , Liu Gui Bin , Li Ke Jun
Published: December 2014

Wind generation can affect the power quality of power supply system in a certain extent at the same time of energy conservation and emission reduction. In order to study the power quality problem of distribution network with wind power embedded, several indices of power quality are defined in this paper, and the doubly fed wind turbine model is established in detail. The voltage deviation, system frequency, and harmonic distortion rate are analyzed based on the simulation data outputted by PSCAD.
An Enhanced Physics Package Used in Rubidium Atomic Frequency Standards
Authors: Feng Hao , Cui Jing Zhong , Tu Jian Hui
Published: December 2014

Physics package is the core of rubidium atomic frequency standards (RAFS). In this paper, a physics package of RAFS with enhanced performance is reported. The physics package is designed according to the separated filter scheme, in which an optical filter and a magnetron microwave cavity are used to reduce the white frequency noise and to intensify the resonance signal. The light-shift (LS) and temperature coefficient (TC) can be conveniently adjusted in the separated filter scheme. A preliminary test shows that a frequency stability of the RAFS is less than .
Water-Saving Intelligence Irrigation Systems Design Based on ZigBee Technology
Authors: Zhu Ling , Zhang Zun Yang
Published: December 2014

This paper designed an automatic irrigation system based on ZigBee, and the system is powered by solar energy. It can provide users with an intuitive on-site system management platform to complete node management and data processing functions. This paper develops a server-side information management system software, achieving real-time monitoring and remote monitoring alarm by the Web, and it simplifies the process of installation and disassembly field devices, making it more suitable for a direct connection of the general inconvenience of monitoring occasions. This article will play a reference role in intelligent irrigation.
Research on the Congestion Management of Power System Based on Multi-Objective Functions and Primal-Dual Interior Point Method
Authors: Chen Wei Hua , Chen Yan Wei
Published: December 2014

Congestion management is a hot point for research in power system. Optimal power flow (OPF) model is often used to solve this problem. However, the results cannot satisfy with market needing. To solve this problem, this paper presents a novel method of congestion management based on risk constraint and fuzzy optimization in electricity power markets. The risk constraint is used for transmission line thermal security instead of the traditional deterministic current or power constraint. The multi-objective functions are used to coordinate the conflict between security and efficiency of transmission network. Primal-Dual Interior Point Method (PDIPM) is adopted to solve the RBOPF problem. The method can minimize re-dispatch cost and the system operating risk.
Automatic Voltage Control and Application
Authors: Chen Wei Hua , Chen Yan Wei
Published: December 2014

Voltage is a key factor not only to power system but also to user. Keep voltage steady is a hot point for researching. Paper proposed keeping steady voltage and improving power quality by using intelligent auto voltage control system. This method is based on the existing power system software and hardware platforms. It is of the advantages of mature technology, small investment, and can improve user’s power quality effectively. Second, the application of auto voltage control on textile manufacture is analyzed. It can improve running environment of textile devices and textile quality
Design of Fiber Data Transmission System Based on FPGA
Authors: Liu Wen Qiang
Published: December 2014

Optical fiber data transmission system has advantages of long-distance transmission, low error rate, high speed data transmission, using FPGA chip NIOSII embedded processor and on chip peripheral constitute the core components, without changing the basic framework of the system, can be upgraded and functional changes to the FPGA internal hardware and software, improved design flexibility, reduced the development cost.
LQR Based Optimal PID Control for Buck Converter
Authors: Tan Gong Quan , Chen Yong Hui , Gu Lei
Published: December 2014

An optimization of PID controller based on indices of linear quadratic state and integration of error (IE) for Buck system is proposed. The optimal original disturbance suppression can be settled well by linear quadratic regulator (LQR) method, while assignment its weighted matrix Q and R is a matter. On the state space description of typical 2-order system, the equations among diagonal weighted matrix, parameters of PID, and characteristics of closed loop system have been established. With this, the steady, rapid and accurate nature of control system are expressed explicitly with the weighting matrix, and optimization of integral error can be easily solved due to integral velocity with constraint of given damping ratio. At last, LQR based optimal control systems with various Q for Buck are simulated, and simulations show the proposed approach have the dual optimality due to disturbance suppression.
Design of LED Lighting Uninterrupted Constant Current Power Supply
Authors: Han Xiao Min
Published: December 2014

This design uses ATMEG8L as the master chip, real-time detection the state of the main power supply DC voltage, by controlling the MOSFET has the ability to quickly turn off the main power and backup power to achieve seamless switching, switching time of less than 1ms; by controlling the MOSFET with the fast turn-off capability to achieve the main power supply and backup power seamless switching, switching time of less than 1ms; Valley-fill PFC circuit is used in the main power supply to ensure the power factor > 0.9, DC-DC buck circuit is composed of LM2576T - ADJ, when great fluctuations in input voltage, output voltage 8 v is very stable, error < 1%, DC-DC boost circuit composed by LM2577T-ADJ, the battery voltage decay process, to achieve a stable output voltage of 8V, LED constant current drive circuit composed by PT4115, adjustable output current and high precision, and then adjust the brightness of LED. Master control chip, through detecting the change of photosensitive resistance, control the duty ratio of PWM wave, In order to achieve LED brightness can be adjusted automatically with ambient light, Protection of the power transformer is perfect, efficiency > 85%.
Conduction Uniformity Improvement of ESD Protection Device in 0.35 μm Partially-Depleted SOI Salicided CMOS Technology
Authors: Tian Zhuo , Li Bai Cheng
Published: December 2014

ComparedtobulkCMOStechnology,Silicon-on-Insulator (SOI) CMOS technology has many advantages, such as low power consumption, low leakage current, low parasitic capacitance and a low soft error rate from both alpha particles and cosmic rays. However,electrostatic discharge (ESD) protection in SOI technology is still a major substantial barrier to overcome for the poor thermal conductivity of isolation oxide and the absence of vertical diode and silicon controlled rectifier (SCR).
Quasi-Steady-State Model of Doubly-Fed Wind Power System for Grid-Connected Simulation
Authors: Yang Ke Lin , Liu Hao Ming , Tang Qiao Qiao , Yuan Xiao Ling
Published: December 2014

With the wind power increasing quickly, its impact on power system becomes greater, thus the dynamic simulation study on grid-connected wind power generators has a significant importance. This paper focuses on introducing the quasi-steady-state approximation method into analyzing the operation characteristics of grid-connected doubly-fed wind power generators. Based on the detailed dynamic model of a variable-speed constant-frequency (VSCF) doubly-fed wind power generator, which consists of wind speed model, the integrated model of wind turbine and drive system, pitch angle control model, converter control model, and the integrated model of generator and converter, the quasi-steady-state approximation method is introduced and applied to simplify the detailed dynamic model to be an order-reduced model, that is, the quasi-steady-state (QSS) model. The accuracy of the QSS model is shown by comparing simulation results of QSS model and the detailed model.
Control of Grid-Connected Quasi-Z Source Inverter Based on Three-States Constant Frequency Hysteresis Current Control
Authors: Deng Kai , Wang Jia Ming , Zhang Chen Yu , Mei Jun , Zheng Jian Yong
Published: December 2014

This paper proposes a hysteresis current control method for the grid-connected quasi Z source inverter with three states and constant frequency. The hysteresis band of the inverter is analyzed in detail, and the shoot-through is inserted into the zero state without affecting the grid-connected control. Moreover, the operating states of the switches are discussed. Finally, the feasibility of the proposed topology is verified by simulations and experiments results.
On Study of Harmonic Load Modeling for Equipment Power System
Authors: Yin Zhi Yong , Chen Yong Guang
Published: December 2014

It has been well recognized that the methods for electrical load modeling have significant impacts on the power systems operation, simulation, analysis and security assessment. Compared with the power grid of infinite capacity, the equipment power system with a large number of power electronic devices has larger internal resistance, and the application objects of the model face to the three-phase four-wire independent power supply system. Therefore, this paper deals with the problem of the three-phase four-wire harmonic load modeling in the equipment power system of infinite capacity, including the basic idea and principle of nonlinear load design, the main circuit structure of the chosen four-leg PWM converter, and the overall control strategy. Based on FFT analysis comparison between the real measured data and the simulation data, it is further shown that the load model can reproduce accurately the current waveform distortion, and simulate the harmonic characteristics of the steady state and transient state of equipment power system.
Solar LED Intelligent Lighting Systems Based on Internet of Things and New Energy Storage System
Authors: Yang Ze Ming , Zhang Xiao Hua , Wang Chao
Published: December 2014

Recently, solar LED lighting systems are widely used because of their energy-saving and environment friendly characteristics. But there are also some key problems in current solar LED lighting systems, such as follows: First, the lifetime of lead-acid battery is too short so that the whole system lose efficacy soon; Second, current solar LED lighting systems usually are isolated systems, so its controllability is worse. This paper propose a new solar LED intelligent lighting systems based on Internet of Things and Supercapacitor ,which can tackle these two problems better, so the solar LED intelligent lighting systems will advance applications of solar LED lighting systems.
Study on Visualization of Large Consumers' Operational Risk Information in Power Supply Company
Authors: Song Xiao Xu , Pan Xiu Min , Gao Fen , Yuan Yu , Chen Zhen , Zheng Hua
Published: December 2014

Large consumers, one of the most important groups which power supply company serves, are nowadays producing increasingly prominent operational risks. The urgent problem that power supply companies face, is to scientifically, accurately and immediately control the risks and its impacts. This paper mainly forces on the visualization of large consumers’ operation risk information in the power supply company. First, the characteristics of operational risk information are analyzed from different dimension features, and various visual elements which are applicable to different risk factors are summarized. On the basis of the first step, combined with the diversified characteristics of large consumers’ risk information, two modified risk visual elements, Heatmap and Treemap, are designed. Finally, the visualization schemes of large consumers’ operational risk information are proposed by instance. Results show that administrators can timely discover and recognize large consumers’ operational risks from these schemes, which effectively improved risk visualization and early warning capabilities.
Design and Implementation of Smart Home Simulation System Based on FS_S5PC100 and Android
Authors: Wang Dong Xing , Xu You Jun , Ma Ying Rui , Li Juan
Published: December 2014

The paper realized a smart home system based on FS_S5PC100 hardware platform and Android frame, and finished the JNI procedures, the Linux bottom drivers and the user interface based on Java. It provides the good theoretic references for develop the real relevant smart home systems in the future.
Fault Diagnosis Based on Neural Network Trained by PSO Algorithm with Information Sharing Strategy for Analog Circuit
Authors: Wei Yan Ming , Gan Xu Sheng , Tang Xue Qin
Published: December 2014

To solve some problems in fault diagnosis for analog circuit, a neural network diagnosis method using improved PSO algorithm is proposed. For the appearance on local convergence and prematurity in the application of standard PSO algorithm, an information sharing strategy is introduced, and then improved PSO algorithm is used to train the neural network for overcoming the deficiency of BP algorithm. The simulation indicates that the proposed fault diagnosis method has the fast convergence and accuracy without local convergence and prematurity for analog circuit.
The Work Course Simulation of Electromagnetic Coil Vertical Launcher for Missile
Authors: Li Wei Bo , Huang Qi Lai , Chang Xiao Yong , Zhou Jian Yi
Published: December 2014

Through putting forward one kind of magnet coil launcher model of new structure; expound the basic component and the work principle of this launcher, built the mathematical model of this launcher work course. Through the dynamic simulation for its work progress, we get the electromagnetism that current and launch package are received power, speed and displacement etc. Comparatively analyzing the influence through changing system stored energy and to the system operating and the progression of launch coil. The result indicates: launching the coil possesses the better acceleration capability than the drive coil; Launching the speed of package energetically has the influence to electromagnetism, and along with the increase of speed, launches the electromagnetism that the package is received energetically reducing more greatly; Suitable change system stored energy can realize the vertical launch of missile with progression that launches the coil.
Analysis and Experiment on the Response Characteristics of a Pneumatic Micro Actuator Based on TBC Model
Authors: Liu Xu Ling , Li Song Jing
Published: December 2014

Using basic physical arguments, we present a design and method for the fabrication of a pneumatic micro PDMS actuator using multilayer soft lithography based on dry-film photoresist. Its novel structure consists of a three-way electromagnetic microvalve for gas flow control which is connected with gas inlet microchannel for the actuator. Then the whole system is considered as a throttle blind capacitor (TBC) model and it is used to predict the response time of the pneumatic actuator by correlating its characteristics such as gas pressurizing, air resistance and membrane deformation. For this micro actuator, upward deformation motions of actuated area are observed of actuated area under 100KPa (N2) pressure and the fast open response (~ 15 ms) was achieved at 50KPa pressure. Our method provides a simple, cheap and save-time pneumatic micro actuator which can be used in active functions, such as valves, pumps and mixers integrated on pneumatic microfluidic chips for downsizing the driving pressure and improving the whole efficiency of microchips.