bluuebunny/crossref_metadata_2025 huggingface dataset:
An Adaptive Intra-Frame Refresh Algorithm Based on Rate Distortion Optimization
Authors: Bao Song Jian
Published: August 2013

The biggest drawback of compressed video code flow is very sensitive to the transmission error. Put forward the motion vector-adaptive intra refresh (MV-AIR) and the rate distortion optimization-adaptive intra refresh (RDO-AIR). The main idea of RDO-AIR is that using the rate-distortion function calculations expense determines whether a macro-block refreshed, it considers the rate distortion estimation for macro-block models selection effect, each frame is dynamically intra-frame refreshed. These two kinds of algorithm by considering the changes of the video itself content characteristics and channel error rate characteristics can be adaptively determine macro-blocks number and macro-block position. Simulation found that the two algorithms effectively enhanced the video stream resistance error performance, at the same time, and the both didnt significantly increase the output bit rate.
The Application of Semantic Similarity in Text Classification
Authors: Zhang Pei Ying
Published: August 2013

Text classification is a challenging problem which aims to automatically assign unlabeled documents to predefined one or more classes according to its contents. The major problem of text classification is the high dimensionality of the feature space. This paper proposes an approach based on the semantic similarity between the title vectors and the category vectors using the tf*rf weighting method. Experiments show that text classifier based on semantic similarity helps dimension sensitive learning algorithms such as KNN to eliminate the “curse of dimensionality” and as a result makes an important improvement in all categories.
A Study of Customized Innovative Self-Portrait Product Design
Authors: Lin Rui Lin
Published: August 2013

Due to the changes of the global market and life styles, the consumption pattern has changed from purchasing mass production products to customized products, resulting in the fact that the importance of innovative product design and development in the whole market is too high to be ignored. Therefore, this study used the hand drawings of self-portraits as templates to present the warmth and uniqueness of the design techniques. Later the operator created the computer graphics using the software commonly used as the reference for development and design of related customized innovative products.
A New Approach for Chatter Prediction in Robotic Milling Based on Signal Processing in Time Domain
Authors: Safi Seyed Majid , Amirabadi Hossein , Lirabi Iraj , Khalili Khalil , Rahnama Saeed
Published: August 2013

Robotic machining is an attractive, cost-effective, and flexible alternative for basic machining applications. Having these characteristics, industrial robots are assumed to be the next generation of machine tools. But, due to weaker structure of robotic manipulators in comparison to conventional CNC machines, robotic machining processes are more subject to unwanted detrimental vibrations. At this work, simulations are realized in Time-Domain using the linearized robot structure model as transfer function of chatter block diagram and end milling force as machining force model. This article presents a new technique for simulating and analyzing the possibility of happening chatter vibrations at different values of machining parameters considering structure and configuration of the studied robot. Results show that limit of chatter occurrence is dramatically affected by changing robotic machining configuration.
Sensor Network and the Internet Data Transmission Technology Research Based on GPRS
Authors: Song Ning Ning , Li Ze Tao , Zhou Xian Wei , Liu Qian
Published: August 2013

With the wide range of applications of the Internet and the rapid development of the communication technology, GPRS technology with its always-online, high access speed, high transfer rate and data traffic accounting, quickly becomes a hot research field of sensor networks connected to the Internet and exchanged the data. This paper based on technologies above, with the design of the GPRS module and the management system of a wireless meter reading system for background, makes a research on the date transmission, the transmission format and the transmission method using the GPRS DTU (Data Terminal Unit) in sensor networks. Then, we design a novel remote GPRS heat meter reading system. This system can realize the coordinated and unified management, remote control of dispersed households heat meter in the city. Finally, the interoperability of sensor networks and the Internet are achieved.
Performance Studies of Linear Quadratic AMD Controller for Civil Engineering
Authors: Guenfaf L. , Allaoua S.
Published: August 2013

In this paper a Linear Quadratic Regulator (LQR) with and without actuator dynamic model for an electric-type active mass driver (AMD) system for structural vibration control has been developed. The electric-type active mass driver (AMD) system is composed primarily of an electric servomotor and a ball screw, the electrical AMD system is free from noise problems, oil leakage, and labor-intensive maintenance that commonly are associated with hydraulic AMD systems. The desired stroke amplification of the mass and the power demand of the servomotor can be adjusted via the ball screw pitch, which affects the effectiveness and efficiency of the system. The AMD system performances without and with introduction of the actuators dynamic model are explored. The reductions of the peak responses can reach as high as 65% if the actuator is properly chosen. And the proposed system is recommended for practical implementation.
A Short-Range Millimeter-Wave Detector System
Authors: Peng Shu Sheng , Xu Feng , Wu Li , Xu Jian Zhong
Published: August 2013

This paper is focused on a millimeter-wave detector system that works at self-heterodyne mode. The detector antenna and MMW front-end are integrated and a weak heterodyne signal is amplified with a low-noise amplifier. After high-speed sampled with a high-speed A/D, digital signal are processed in a FPGA. Some experiment results are shown finally.
C2 Model of Agent-Based Radar Network
Authors: Zhang Zao , Si Guang Ya
Published: August 2013

Radar network is a typical complex adaptive system (CAS). The command and control (C2) of radar network plays a big part in improving the quality of the acquired data and the anti-damage ability of radar network. On the basis of analyzingradar networkcombat process,a method based on Agent was proposed to establish command and control (C2) modelof radar network.The structure of the Agent was put forward and based on that, theadaptive C2 model was represented as a 6-tuple system.The simulation experimentwas made in the presumed background and the results showed that the modeling of adaptive command and control of radar network was implemented.
Analysis on Logistics Operation Mode of Fresh Vegetables
Authors: Wang Hui Zhen
Published: August 2013

Fresh vegetable logistics is an important part of agricultural product logistics in our country, but the unique characteristics of fresh vegetables, fresh time for vegetable logistics requirements is strong. therefore, the logistics mode selection of fresh vegetables is particularly important, several modes of vegetable logistics,are analyzed in detail in this paper, and provide some reference for the fresh vegetable logistics mode select.
The Application of a Kind of New LFM Signal in Quasi-Continuous Wave Radar
Authors: Zheng Zhi Kuan , He Qiang , Han Zhuang Zhi
Published: August 2013

In order to solve the contradiction of pulse radar detection range and range resolution, the LFM signal which has a large time-bandwidth product is chosen to be modulated on the transmitter pulse. So that the radar has larger width and higher range resolution. Since the conversion of the transceiver switches, wide LFM signal may cause close range blind spots. Timeshare launching one long and one short signals is traditional solution, but it will cause a lower data rate. A kind of dual-LFM signal based on frequency division multiplexing is presented, the short pulse is used in short-range to offset the lack of wide LFM signal. Through simulation, it is guaranteed that, by using this kind of signal, the radar has a higher resolution regardless of the target distance, and the short-range blind spot also can be eliminated.
Simulation on Networked Munitions System Control with Time Delay
Authors: Sun Ping , Hu Shou Wei , Wang Wei
Published: August 2013

Networked munitions system is becoming more and more important with the development of modern electronic technology. This new generation of ground-based munitions are much more intelligent for the capability they have to trace targets, communicate with each other and order a killing node for vehicles caught in the kill-zone . It is useful to study and attempt to model through simulations the interaction between enemy targets and the whole munitions system . This paper is to propose a simulation-based model to study the performances of the weapon system. Especially, the sensors which sense the environment and the weapons which attack the targets are connected with wireless networks that will bring time delay to the system. We focus our efforts to evaluate how time delays from wireless communication affect the control performance of the weapon. This study introduces models for sensors and communication routing mechanisms , as well as the servo system and vehicle targets. A series of simulation trials to analyze and compare the effects of time delays have on the killing efficiency. The results of the study indicate in general that communication delay have the most effect on the systems.
Computation of Intercept Probability Based on Functional Simulation of Front-End Interception
Authors: Chen Xing Kai , Han Zhuang Zhi , Feng Ji Ping , Fan Zhen Qin
Published: August 2013

Front-end intercept probability of reconnaissance equipment is a significant evaluation index of radar reconnaissance system. It shows the ability of discovering and detecting radar signal in the front of reconnaissance equipment. In order to obtain the relatively authentic intercept probability, first, rules of intercept judgment are elaborated. Then front-end interception is devised through the reconnaissance equipment functional simulation. Finally, intercept probability is calculated in Monte-Carlo simulation, and an application verification is realized. The result indicates the method of intercept probability computation is feasible and has certain application.
New Development of Graphene Material and Device
Authors: Song Li Hong , Ji Jun , Chen Gang
Published: August 2013

Recently, graphene has attracted a lot of attention and made great progress in material and device preparation. This paper highlights the progress in graphene material and device preparation. In material preparation, we compare some different methods and deduce the better methods; In device design, we mainly discuss the new ways to the problem of graphene based transistors, that is the small current on/off ratio. At last, we mention some important developments of graphene.
Improvement of Zr-N Diffusion Barrier Performance in Cu Metallization by Insertion of a Thin Zr Layer
Authors: Zhai Yan Nan , Zhang Hun , Yang Kun , Wang Zhao Xin , Zhang Li Li
Published: August 2013

In order to increase the failure temperature of Zr-N diffusion barrier for Cu, the effect of insertion of a thin Zr layer into Zr-N film on Zr-N diffusion barrier performance in Cu metallization was investigated by means of X-ray diffraction, scanning electron microscopy, Auger electron spectroscopy, and 4-point probe technique. XRD,SEM ,AES and FPP results show that the insertion of a thin Zr layer into Zr-N film improves barrier properties significantly when the ZrN / Zr/ZrN barrier layers are deposited by RF reactive magnetron sputtering and Zr-N(10nm)/Zr (5nm)/Zr-N(10nm) barrier tolerates annealing at 700°C for 1 h without any breaking and agglomerating Cu film. This interpretes that insertion of a thin Zr layer into Zr-N film is attributed to the densification of grain boundaries in ZrN/Zr/ZrN films followed by the reduction of fast diffusion of Cu through ZrN /Zr/ ZrN multilayered films.
Rolling Bearing Fault Diagnosis Based on Wavelet Packet and Improved BP Neural Network for Wind Turbines
Authors: Hou Zhao Ran
Published: August 2013

Vibration signal was a carrier of fault features of the wind turbine transmission system, it can reflect most of the fault information of the wind turbine transmission system. According to the frequency domain features of the roller bearing fault, wavelet packet transform for feature extraction was proposed as the characteristics of wind turbines in the presence of a large number of transient and non-stationary signals. The characteristics of wavelet packet was analyzed, combined with the wind turbines in the rolling bearing fault characteristic vibration extraction methods, the rolling bearing fault diagnosis was realized through the wavelet packet decomposition and reconstruction, the procedure was given. The simulation result shows that this application can reflect relationship of the failure characteristics and frequency domain feature vectors, also the nonlinear mapping ability of neural networks was played and the fault diagnosis capability enhanced.
The Study of Discharge Light on XLPE-SIR Composite Medium Interface
Authors: Chen Xin Gang , Zhang Chao Feng , Gu Liang , Cao Mei Qing
Published: August 2013

The cross-linked polyethylene cable is largely used in power-supply system of the city. As the length of the power cable is concerned with the technology and construction, the center joint is largely employed, and the fault of the power cable is often found in the center joint. The discharge light has been seen on the face of the XPLE-SIR in work. The carbonization granule which appears after the discharge is the primary cause of the insulation degradation. A sample is designed, and the alternate electric-field rise on it to imitate the operational aspect. This paper analyses the relation of the discharge light, discharge current and carbonization granule. We find that it is feasible according to study the interface discharge light to deduce the characteristic of discharge and carbonization granule, and judge the degree of the interface insulation degradation.
Thickness of Magnesium Alloy Square Parts in Hydraulic Deep Drawing
Authors: Mao Xian Chang , Yang Lian Fa , Liu Yun , Li Shi Yang
Published: August 2013

Forming effect of square parts is influenced greatly by technical parameters in hydraulic deep drawing, and it is significative to investigate the parameters. The technical parameters which influence the cold forming effect (wall thickness difference and minimum wall thickness) were introduced in detail by numerical simulation method, including the load method of blank holder force, drawing speed, hydraulic pressure, etc. Furthermore, the reasonable technological parameters were concluded and the wall thickness distribution of magnesium alloy square parts was discussed in this paper. The results show that the cold formability of AZ31B magnesium alloy square parts could be improved when adopt reasonable technological parameters and blank holder force load path in hydraulic deep drawing.
Key Fabrication Technology Research of Exploding Foil Initiator
Authors: Lv Jun Jun , Zeng Qing Xuan , Li Ming Yu , Yu Qing Xia
Published: August 2013

In order to realize consistency and low cost in the production process of the exploding foil initiator, the manufacturing method of exploding foil initiator was studied using micro processing technology. Microcrystalline glass was used as substrate, and magnetron sputtering,photolithography and wet etching technology were utilized to product the metal bridge foil on the surface of the substrate. SU-8 photoresist was used as the barrel material and scanning electron microscope was exploited to characterize structure of the initiator. Through the electrical tests, the flyer was successfully generated and after the barrel had a good integrity.
A New Type of BOM Model and its Application
Authors: Wang Yao , Wang Wei Guo , Mao Song
Published: August 2013

To exactly represent the graph data structure of BOM in actual design and production, BOM structure was defined as an independent entity in the storage model and the relations of Father_Part-Structure and Structure-Son_Part were separated and described mathematically respectively. A novel storage model combining XML data model and relational data model was built, and the tree structured XML model was designed as the cache of BOM query results to avoid the inefficiency of transforming BOM data from relational model to tree structured object model. The entity relationship diagram of the novel model and the XML schema of the cache were present, and the methods of creating and querying the cache in XML type was introduced in detail. Running in a real system, the novel model can greatly improve efficiency of BOM data querying comparing to traditional models.
Discussion on Optimizing Internal Supply Chain of Chinese Enterprise
Authors: Yang Wei Xia
Published: August 2013

At present, the competition between enterprises has become the competition between supply chains.Whether enterprises can survive in the fierce competition, that depends on the operation level of enterprise supply chain. This paper introduces the idea of internal supply chain.Firstly, the paper introduce the concept and characteristic of internal supply chain. Secondly it analyzes the problem originated from the operation process of internal supply chain and the cause of these problems. Finally, it puts forward some optimization strategy that can make the enterprise internal supply chain operate smoothly, so as to make enterprise more competitive in the market competition.
Digital Watermarking Method against Rotation Attack Based on Angle Measurement
Authors: Zhao Jie
Published: August 2013

Digital image watermarking algorithm based on contourlet transform and discrete cosine transform (DCT) is proposed in this paper. The original carrier image is decomposed with contourlet transform. The low pass component is divided into sub blocks. The watermark bits are embedded by the quantization of direct current (DC) coefficients of these sub blocks. In order to against rotation attack, the radon transform is used to project the image onto projection space to convert the rotation of the original image to a translation of the projection and then the bi-spectrum analysis approach is applied to estimate the rotate angle of the test image. The detection process is robust to rotation attack by virtue of this rotation correction method.
Fiber Grating Based 64-Channel Interleavers with 25GHz Channel Spacing and Flat-Top Passbands
Authors: Huang Li Qun , Yang Guang
Published: August 2013

An interleaver can separate odd and even channels into two signal streams. In this paper, a novel chirp fiber grating with 14cm length is designed by using the layer-peeling algorithm, which can implements the function of a broadband interleaver with 25GHz channel spacing. The interleaver has 64 channels and flat-top passbands, and its channel isolation is above 28.5dB. All passband central wavelengths are suited for ITU standards, moreover, this grating-based interleaver can be manufactured by existing technologies.
Design of ARM Based Tiny Multi-Process Mono-Kernel
Authors: Qu Bo
Published: August 2013

This paper describes the key techniques for designing and implementing an ARM based tiny multi-process mono-kernel, including architecture of multi-process mono-kernel, init process creation, system calls, process management, interrupt-mode UART and simple TTY, etc. The entire kernel is developed on Linux platform with GNU tool chain by the author of this paper from scratch. On the premise of implementing essential functions of an ordinary embedded operating system, the kernel is designed as simple as possible, made up of only 3,600 lines of code, therefore suited to both embedded operating system research and embedded related curriculum teaching.
A New Method for Network Reconfiguration of the Shipboard Power System
Authors: Yang Xuan Fang , Wang Jia Lin
Published: August 2013

The Multi-objective Optimal AlgorithmNSGA-II for Network reconfiguration of the shipboard power system is proposed to overcome the shortcomings of single objective optimal algorithm. This paper chooses the least of lost loads and cost of switch operation as objective function, uses capacity and structure as constraints, codes two-dimensional gene with switch and uses NSGA-II to solve the multi-objective and multi-restriction network reconfiguration problem. The test results of a typical integrated power system show that the model can balance each objective to avoid extreme results, which make restoration schemes more practical.
Research on Reactive Power Optimization of Voltage Control of Power Grid
Authors: Gong Yu
Published: August 2013

The reactive power optimization control of grid voltage is the important measures of lowering the net loss and improving the voltage quality. The paper reviews the situation of voltage reactive power control in our country, putting forward implementation program of AVC system. The system can collect and dispatch the real-time data of automotive nodal voltage, active power and reactive power and so on. The objection is minimum net loss and voltage excursion. After optimization of the system we can form a set of commands about the position of the shunt capacitor and adjust the tap of load and OLTC.These commands can be carried out through dispatching automatic four remote control system.The control system can effectively improve the voltage quality, reduce grid power loss, and make reactive power compensation equipment fully utilized, so have a strong broad application value.
Design of a New Oscillating Buoy Wave Power Generation Device
Authors: Duan Chun Ming , Zhu Yong Qiang
Published: August 2013

With the deepening of global energy crisis, looking for the new energy to replace traditional energy become the only way for the development of energy. This paper designs a new oscillating buoy ocean wave power generation device. It introduces the basic composition of the device and its structure, and its working principle and process. Combining the wave theory and calculation principle, wave power conversion efficiency theory, analysis and calculate the energy conversion efficiency of the device. Suppose the device is under the action of linear wave, through the theoretical calculation, the theoretical efficiency of this device is up to 0.383 when the wave period is 4 s, wave height is 0.5 m, buoy Side length is 0.3m, wind pipe diameter is 0.05. Compared with common wave power generation device, this device has higher power generation efficiency.
Harmonic Instability at Sending End of the Exceedingly Weak HVDC System
Authors: Cao Wen Jia , Wen Jun , Ma Shu Qing , Xue Jun Ru , Zhang Hai Ning , Zhou Si Yu , Lv Si Zhuo
Published: August 2013

As the development of high voltage direct current (HVDC) transmission, the problems of harmonic instability become more prevalent. Besides, harmonic instability in exceedingly weak HVDC systems is particularly serious. The modulation of the DC converter based on switching function is deduced. By considering the whole process of harmonic transferring at the AC and DC side through converters from the perspective of circuit, the generation conditions of harmonic instability are analyzed. Then an exceedingly weak HVDC system model is established and simulated in PSCAD/EMTDC software to verify the theoretical analysis. The study results provide theoretical basis and computational methods to solve the problems of harmonic instability in HVDC systems.
Design of STM32-Based Angle Information Processing System of a Guide Microscope
Authors: Cao Bin Qian , Cheng Yuan Zeng , Sun Shu Ying
Published: August 2013

A guide microscope is an important part of a certain photoelectric automatic tracking system, and the angle informations acquisition, processing and transmission are the keys for using the guide microscope. According to the application requirements, a kind of angle information processing system of the guide microscope based on STM32 is designed. This system uses the high-performance STM32F103 as the control core and realizes the angle information acquisition, display and transmission by photoelectric encoders, OLED display and RS-485 bus. Then, the hardware design and software debugging are further explained, that it has the simple circuit and convenient development. The running results show the design has the stable and reliable performance. It can meet the requirements.
Comprehensive Decision-Making of Power Planning Including Clean Energy and Low-Carbon Electricity Technology
Authors: Zhong Jia Qing , Zhang Xiao Hui , Yan Ke Ke , Ma Li Ye , Hu Hua Wei
Published: August 2013

According to the characteristics of power planning, select four key planning scenarios, calculate the initial probability and simulation probability in sequence, and thus calculate the scenario probability. Define the screening considering the scenario probability and incidence of evaluation factor index for the typical scenario. In the decision-making process, the fuzzy decision method of interval numbers based on trapezoidal membership function is used to calculate the scheme membership, which overcomes the difficulty of precise calculation problem for planning index. And according to maximum membership degree for sorting, finally obtaining quality comparison results of the scenarios. As an example of a "twelfth five-year" planning of one city, an integrated decision making of power planning is developed, the simulation results show the scientificity and rationality of the method.
Magnetization Research in Time-Domain Magnetic-Circuit Coupled Computation for DC-Biased Transformer
Authors: Cai Guo Wei , Wang Yi Gong , Jiang Yang Jin , Li Tie Feng
Published: August 2013

By revised method of fitting magnetization curve in segment, technique of simulating the nonlinear characteristic of laminated core is enhanced. The DC-bias problem is computed based on the time-domain magnetic-circuit coupled model while considering the saturated and unsaturated magnetizing characteristics of the laminated core. Experiments are designed to verify the validity of the proposed method, and then the volt-ampere feature of unsaturated magnetization is learned. Consequently, the results indicate that the improved method is more accurate and efficient by contrast.
Asymptotic Performance Analysis of Two-Way Opportunistic Relaying Channels
Authors: Ouyang Yu Hua , Jia Xiang Dong
Published: August 2013

The work interests in the two-way opportunistic relaying (TWOR) system in which the analog network coding (ANC) employed. For the TWOR-ANC, we first present the traditional max-min best relay selection scheme as well as the corresponding closed-form analytical expressions for the cumulative distribution function (CDF) and the probability density function (PDF) of the end-to-end SNR. Then, to simplify the analysis of system performance, by using the approximation of the modified Bessel function of the second kind, , we obtain the performance bounds of the TWOR-ANC system. The analytical results show that e-z/z determines the lower bound of system performance, and the exact solution of system performance is very close to the lower bound in low SNRs. At the same time, 1/z does the upper bound, and the exact solution is very close to the upper bound in high SNRs. Thus, in high SNRs or lower SNRs, the system performance can be measured approximately by the upper bound or lower bound.
Performance Evaluation of Efficient MANET Routing Protocol in Smart Grid
Authors: Meng Fan Bo , Zhao Hong Hao , Zhao Qing Qi , Ma Wei Zhe
Published: August 2013

Mobile Ad hoc Network (MANET) is an effective method to solve the bottleneck of information collection and wireless transmission in Smart Grid. The particularity of MANET determines the importance of routing protocols. In order to improve the performance of MANET routing protocol, in this paper we evaluate the routing protocol, i.e., Ad hoc On demand Distance Vector (AODV), from several perspectives that did not draw attention in previous works. Furthermore, we also compare AODV with the routing protocol Dynamic source Routing (DSR). The simulation shows that AODV outperforms DSR in generally, and the former is suitable for larger MANET network. The simulation results in this paper not only provide effective evidence for further optimized routing protocols and the current protocols, but also provide feasible solution for Smart Grid to collect and transmission data by using MANET technology.
Impacts of UHVDC from Hami to Zhengzhou on Voltage Stability of Henan Power Grid
Authors: Hu Yan Mei , Wu Jun Yong , Li Fang , Fu Hong Jun
Published: August 2013

Based on the planning data of Henan power grid in 2014, the impacts of 800kV UHVDC from Hami to Zhengzhou on static voltage stability of Henan power grid are analyzed in details. Firstly, this paper introduces the principle of voltage stability analysis, the stability margin index has been established. Secondly, the analysis of static voltage stability for Henan power grid before and after the UHVDC from Hami to Zhengzhou putting into operation is carried out, the weak buses and regions in Henan power grid are pointed out. Finally, the operation patterns of Henan power grid after the UHVDC putting into operation are classified and optimized. Simulation results show that the improper operation pattern may significantly deteriorate the static voltage stability of power grid. The operation patterns of HVDC power multi-channel transferring from Henan to Central China grid combined with partly internal consumption are favorable to improve the static voltage stability of the whole system. The analysis results provide theoretical basis for the future operation of Henan grid.
Thermal Unit Commitment Problem with Wind Power and Energy Storage System
Authors: Wang Rui , Xie Yu Guang , Xie Kai , Luo Ya Qiao
Published: August 2013

This paper presents a methodology for solving unit commitment (UC) problem for thermal units integrated with wind power and generalized energy storage system (ESS).The ESS is introduced to achieve peak load shaving and reduce the operating cost. The volatility of wind power is simulated by multiple scenarios, which are generated by Latin hypercube sampling. Meanwhile, the scenario reduction technique based on probability metric is introduced to reduce the number of scenarios so that the computational burden can be alleviated. The thermal UC problem with volatile wind power and ESS is transformed to a deterministic optimization which is formulated as the mixed-integer convex program optimized by branch and bound-interior point method. During the branch and bound process, the best first search and depth first search are combined to expedite the computation. The effectiveness of the proposed algorithm is demonstrated by a ten unit UC problem.
The Research on Modeling to Optimization of the Site Selection for Coal-Fired Power Plants with CCS Technology
Authors: Zhong Jia Qing , Lu Zhi Gang , Yan Ke Ke , Zhang Xiao Hui
Published: August 2013

In this paper the site selection is researched to new coal-fired plants containing CCS technology. The cost of CO2 pipeline transport and the income of strengthening oil exploitation with CO2 are added to traditional model. They are the main factors to effect the site selection. The model is established with the minimum comprehensive cost per year of the system for target function. The optimized site scheme is determined through model solution with BCC optimization algorithm. The geographical area of one region is divided into smaller units and coded. The optimizing result shows that the proportion of power transmission cost is larger,so power plant site is close to load points. Moreover the cost of pipeline transportation holds a sizable proportion. It is needed to balance factors to confirm the best optimized scheme.
Optimization of Restoration Paths of Power System after Blackout
Authors: Huang Wen Wei , Yao Gang , Qiu Xiao Yan , Liu Nian , Chen Guang Tang
Published: August 2013

Optimization of restoration paths of power system after blackout is a multi-stage, multi-target, multi-variable combinatorial problem in the power system restoration. This paper presents a reasonable model and effectually method. The proposed model is considered as a typical partial minimum spanning tree problem from the mathematical point of view which considering all kinds of constraints. Improved data envelopment analysis (DEA) was used to get the weight which considering line charging reactive power, weather conditions, operation time and betweenness of transmission lines. The improved genetic algorithm method is employed to solve this problem. Finally, an example is given which proves the strategy of the line restoration can effectively handle the uncertainty of the system recovery process, to guarantee the system successfully restored after the catastrophic accidents.
A Benefit Analysis Model for Inter-Regional Power Generation Exchange of Coal-Fired Power Plant
Authors: Sun Lei , Tan Zhong Fu , Ju Li Wei , Li Huan Huan , Zhang Chen
Published: August 2013

In order to improve the situation that there is a high pollution emission from coal-fired power plant in China and after a lot of research on inter-regional power generation exchange, we find that pollution emission would be reduced by exchanging power generation in the inter-regional coal-fired power plant. Taking the quantity of coal saving, economic benefit and environmental benefit into account, this paper proposes an analysis model for calculating the quantity of coal saving, added value and pollution reduction in the inter-regional power generation exchange, analyzing the benefit brought by this exchange. The case study shows that by using this model, pollution emission would be reduced in the whole region and economic and environmental benefit would be added in both electricity buyers and sellers. This analysis model has an application value.
Multifunction USB FM Radio Based on LabVIEW
Authors: Zhu Lei , Huo Xiao Bo , Wu Jiang Yong , Wang Hui Jun
Published: August 2013

In order to make common PC with the functions of receiving FM stereo broadcasting from the local FM radio station and collecting the temperature and humidity data in surrounding environment, a multifunction USB FM radio based on LabVIEW is presented in this paper. In the presented FM radio, the C8051F340 processor with on-chip universal serial bus (USB) peripherals is used as slave computer to control the Si4702 through I2C bus and the DHT11 through I/O port, and PC is designed to be host computer to get user instructions and connect and control the slave computer to finish the functions of receiving FM stereo broadcasting and collecting the temperature and humidity data by graphical user interface (GUI) programed by LabVIEW software and USB communication. Experimental results show that the presented USB FM radio has a friendly GUI and can be used feasibly and efficiently. Furthermore, new functions of the system can be extended by virtue of upgrading GUI program.
The Design of Concentrator in Smart Grid
Authors: Bai Min Dan
Published: August 2013

Concentrator is the central part of the energy information collection and management system. It can stay online for a long-term, and is stable and reliable. It has powerful ability in information acquisition and processing. Compared with other detection equipment, concentrator is the best platform to do the PLC network detection. This paper designed a set of embedded PLC network detection concentrator. The design based on ARMS embedded platform, ARM-linux system to achieve concentrators operation and inspection function, and also based on PLC-Modem to achieve recording of the carrier energy meter. Therefore,users can select different detection schemes to test the status of electric power carrier communication network.
A Calculation Method of Reactive Compensation Susceptances Based on Balance Principle
Authors: Sun Xiao Bo , Meng Da Wei
Published: August 2013

Static var Compensator (SVC) can suppress the voltage fluctuation, flicker and rapidly compensate the reactive power and the quality of electric power can be improved. In this paper, a new calculation method of reactive susceptances based on balance principle was proposed, which only uses the fundamental positive reactive and negative active & reactive components, and was analyzed and verified by simulation and dynamic test. The results of simulation and experiment show that the method can achieve the dynamic compensation of reactive power of the unbalanced load, and it is accurate, rapid and efficient.
A Method for Online Reactive Power Optimization Problem in Regional Power Grid
Authors: Tang Yong Hong , Xu Lin , Fan Hong , Yang Yu De
Published: August 2013

The automatic voltage control system in regional power grid is a significant measure to improve the system voltage and the power quality. It relies on online reactive power optimization. This paper proposes a novel algorithm aimed to build an online reactive power optimization model, which uses a hybrid algorithm combined the primal-dual interior point method and branch and bound method. Dealing with the discrete variables and continuous variables separately, the solution speed and accelerate convergence problem is improved rapidly. Finally, the efficiency of the proposed method is verified by numerical simulation in a regional power grid system.
Method of Reactive Power and Voltage Optimization Control Based on RTDS
Authors: Li Min , Tang Yong Hong , Xu Lin , Fan Hong , Yang Yu De
Published: August 2013

Automatic voltage control (AVC) system has been widely used in power systems at home and abroad, with some problems in applications. This paper proposes a closed-loop testing method based on real time digital simulation system (RTDS) and reactive optimization procedures to simulate the actual AVC operation mode, we can obtain an optimal control which is different from the actual AVC system, it can be used as the actual AVC system judgment to evaluate the action effectiveness and the advantages/disadvantages of the actual AVC system compared with optimal results. Finally, the simulation tests show that RTDS-based reactive power and voltage optimization control method is good so that it can be regard as reference to evaluate the control effectiveness of the actual AVC system action.
Application of 1200V-8A SiC JBS Diodes in the Motor System
Authors: Liu Ao , Chen Gang , Bai Song , Li Rui , Sun Wei Feng
Published: August 2013

1200V-8A 4H-SiC junction barrier schottky (JBS) diodes were designed and fabricated based on in-house SiC epitaxy and device technology. As a free-wheeling diode for the IGBT in inverter of motor system, the 1200V SiC JBS diode was compared to the Si ultra-fast diode from Fairchild Co. Ltd. The SiC diode achieved 88% recovery loss reduction and corresponding IGBT showed 35% lower turn-on loss. So, it will promote the application of motor system in high frequency and high efficiency.
Federated Particle Filter Technology Based on JIDS/SINS/GPS Integrated Navigation System
Authors: Li Zi Yu , Liu Yan , Zhu Ping , Ying Cheng
Published: August 2013

In multi-sensor integrated navigation systems, when sub-systems are non-linear and with Gaussian noise, the federated Kalman filter commonly used generates large error or even failure when estimating the global fusion state. This paper, taking JIDS/SINS/GPS integrated navigation system as example, proposes a federated particle filter technology to solve problems above. This technology, combining the particle filter with the federated Kalman filter, can be applied to non-linear non-Gaussian integrated system. It is proved effective in information fusion algorithm by simulated application, where the navigation information gets well fused.
Design and Implementation of IEEE 1394 Signaling Rate Converter
Authors: Tang Qing , Feng Xiao Dong
Published: August 2013

This paper mainly expounds the design and implementation of IEEE 1394 signaling rate converter, and emphatically describes the system structure design, basic hardware design, and function realization of IEEE 1394 signaling rate converter. IEEE 1394 signaling rate converter mainly realizes the function of signaling rate conversion in legacy mode, signaling rate conversion in Beta mode, mode change between legacy and Beta, and 1394 bus relay.
The Analysis Circuit-Breaker Damage Caused by Fever
Authors: Zhang Xue Ping , Yang Yan Xin , Zhang Nan Hui , Zou Huan , Li Yu
Published: August 2013

Through the analysis of the same 110kV substation and the same voltage level side, two times the cause of damage points in circuit-breaker with fever, finding out the causes, it expounds how to avoid will not occurring similar accidents in the future, and improves the power supply reliability. On the other hand, it expounds the importance of enhancing the monitoring in operation and improving quality in repairing.
Study on the Statistical Performance of Relay Cooperation Over Non-Isotropic Mobile-to-Mobile Nakagami-m Fading Channels
Authors: Jia Xiang Dong , Ouyang Yu Hua
Published: August 2013

This work focuses on the investigation of the second-order statistical descriptions for full mobile wireless networks over non-isotropic Nakagami-mfading environment. The system consists of a source, a relay, and K destination users, all of which are mobile. For the full mobile system model, we first extend the Akki and Habers mobile-to-mobile (M2M) model to non-isotropic scattering fading channels by adopting the von Mises PDF for both the angle of arrival (AnOA) and the angle of departure (AnOD). With appropriate mathematical proof, we obtain the approximate solution to the correlation function of M2M Nakagami-mfading channel envelop, and the variance of the first derivative. Secondly, using the obtained correlation, we study the average outage rate (AOR) and the average outage duration (AOD) of the multi-user single relay cooperation system in detail, and obtain the closed-form analytical expressions to AOR and AOD.
Modeling and Simulation of Triangle Cantilever Piezoelectric Vibrator
Authors: Chen Yong Chao , Gao Min , Yu Wei Bo , Zhang Lei
Published: August 2013

In considering of the triangle cantilever beam can improve the problem of stress concentration in rectangular cantilever beam, the piezoelectric power generating mathematical model of triangle cantilever piezoelectric vibrator is build base on piezoelectric equation and material mechanics. The effect of structure size on the electricity generating capacity is simulated with numerical The result shows that the applied electric field have less effect on the output voltage, and the substrate thickness and length of cantilever beam have bigger influence on the output voltage.
Design of Web Based Secure Embedded System in C
Authors: Qu Bo , Yang Zhong Xue
Published: August 2013

This paper describes the design and implementation of Web based secure embedded system, including tiny secure Web server, embedded system-based CGI library, and utilities for security, such as CAPTCHA program and mail sending program. The entire system is designed in C by the author of this paper on Linux platform with GNU tool chain. A Web based secure embedded application demo system is also designed to show the architecture and running effect. On the premise of implementing essential functions, the scale of the system is designed as small as possible therefore it is suitable not only for embedded Linux development on Web based applications but also for embedded system course teaching in colleges and universities. By some further extensions, it can also be used on development of general Web based MIS.
Simulation, Fabrication and Characterization of 4500V 4H-SiC Normally-Off VJFET
Authors: Huang Run Hua , Chen Gang , Bai Song , Li Rui , Li Yun , Tao Yong Hong
Published: August 2013

Simulation, Fabrication and characteristics of high voltage, normally-off JFETs in 4H-SiC are presented. The devices were built on ND= 1.01015 cm-3 doped 50μm thick n-type epilayer grown on a n+ 4H-SiC. Parameters of edge termination have been optimized by simulations. Its blocking voltage exceeds 4500V at gate bias VG = -6V and forward drain current is in excess of 3A at gate bias VG = 3V and drain bias VD = 5V corresponding a current density of 80A/cm2.
Design of Embedded System-Based CAPTCHA in C
Authors: Qu Bo , Wu Zhao Zhi
Published: August 2013

This paper describes the technical details of design and implementation of embedded system-based CAPTCHA (verification code) in C, including a brief analysis of techniques for implementing CAPTCHA, and a simple and practical CAPTCHA system designed by the author of this paper, which can be used not only in embedded systems but also ordinary Web based MIS or control systems, without the support of any dedicated graphics library. An example is provided to show the practical usage and effect of this CAPTCHA system on an embedded application demo system.
Research and Design of Beamforming Device of SLC-LSCMA Algorithm Based on FPGA
Authors: Zhou Qing Fang , Yu Yan Yan , Wang Lei , Yang Jun
Published: August 2013

In this paper,we design a uniform circular array beamforming device of 16 yuan based on the least squares SLC-LSCMA algorithm (based on the linear subspace constrained least squares cma) high stability and rapid convergence for the foundation. The design of the complete beam-forming the SLC-LSCMA algorithm by plural, time-multiplier and accumulators, which uses less resources and faster than the traditional algorithm. The beamforming device uses hardware description language of Verilog HDL , and wires on the QUARTUS II 8.0. Finally the beamforming device is downloaded to the Alteras EP2C35F672C6, and its timing simulation can be run properly in the 50MHz clock frequency. This design can be widely used in mobile communication and satellite communications.
Single Channel Signal Separation of GMSK Signals Based on MLP
Authors: Wu Shi Long , Luo Jing Qing , Wang Hua Xing
Published: August 2013

In according to the issue of multi-signal jamming in communication reconnaissance, single channel signal separation for multi-GMSK signals has been studied with a method based on MLP. With parameters of Doppler-shift, time-delay, amplitude and coding sequences efficiently estimated, signals could be restructured, and then be separated. Simulations have proved well separation results can be obtained with the method for unequal power signals with certain SNRs.
Customized MMRF: Efficient Matrix Operations on SIMD Processors
Authors: Zhang Kai , Wang Yao Hua , Chen Shu Ming , Li Zhen Tao , Wen Liang
Published: August 2013

Wireless communication and multimedia applications feature a large amount of matrix operations with different matrix size. These operations require accessing matrix in column order. This paper implements a Multi-Grained Matrix Register File (MMRF) that supports multi-grained parallel row-wise and column-wise access. We implement a 4*4 MIMO decoding with the help of MMRF to illustrate the efficient matrix operations on SIMD processors. Experimental results show that, compared with TMS320C64x+, our SIMD processor can achieve about 5.65x to 7.71x performance improvement by employing the MMRF. By customized design technology, we reduce the area and critical-path delay of MMRF by 17.9% and 39.1% respectively.
Research on Signal "Batch-Increasing" Phenomenon of Superheterodyne Reconnaissance Receiver
Authors: Hao Yan Zhong , Zhang Hong Liang , Zhang Fu Chun , Hui Wang , Xu Zheng Dong , Wang Duo
Published: August 2013

For the superheterodyne reconnaissance receiver detected "signalBatch-increasing" phenomenon, research on radar signal sand the intercepted characteristics of reconnaissance receiver from the frequency domain, pointed out that "Pulse-width split" and "Pulse-width truncated" caused by Emitter signal spectrum loss is the reason of "Batch-increasing",On this basis, analyzed the strategies of "Batch-increasing" signal processing .