bluuebunny/crossref_metadata_2025 huggingface dataset:
Using GM(0,N) Model to Analyze the Radiation in Fukushima Nuclear Accident
Authors: Lou Xi Juan
Published: June 2013

The main objective of this study is to analyze the relevant factors of nuclear reactor 1 in Fukushima nuclear accident. The analysis results have shown that GM(0,N) is effective and applicable. The forecasting result of the level of radiation 60km away from Fukushima Dai-ichi Nuclear Power demonstrates that GM(0,N) provides very remarkable predication performance compared with traditional multiple regressive.
Dynamic Multi-Attribute Decision Making Model with the Area Closeness Degree
Authors: Lou Xi Juan
Published: June 2013

The aim of this paper is to explore dynamic multi-attribute decision making (DMADM) problems in which the decision making information of alternatives is collected at different stages. Firstly, the area closeness degree is applied in normalizing the raw data. Secondly, the weights of different stages are determined by according to the principle of new information priority. The technique for preference by similarity to ideal solution (TOPSIS) is improved to aggregate the information from different stages. Finally, the example is illustrated to demonstrate the practicality and effectiveness of the proposed methods.
A Distributed Networked Storage System with Secure Fault-Tolerant Codes
Authors: Tan Peng Xu , Chen Yue , Jia Hong Yong
Published: June 2013

Regenerating codes are based on the concept of the network coding. Compared with the traditional codes used for fault-tolerant, it has advantages for its low redundancy and high efficiency. We present DSRC, a distributed networked storage system realizing a traditional regenerating code and a secure regenerating code in real network settings. We deploy and evaluate our DSRC prototype in a real network setting. We also use DSRC to experiment the empirical performance of storage schemes with the secure regenerating code. The evaluate shows that the secure regenerating code can achieve the security of the fault-tolerant process with a little higher throughput.
The Application of Apriori Algorithm in Analysis on Admitted Students of Colleges and Universities
Authors: Zhang Qian
Published: June 2013

This paper examined the application of Apriori algorithm in extracting association rules in data mining by sample data on student enrollments. It studied the data mining techniques for extraction of association rules, analyzed the correlation between specialties and characteristics of admitted students, and evaluated the algorithm for mining association rules, in which the minimum support was 30% and the minimum confidence was 40%.
Research on Database and Mining-Map Automatic Generation System of Metal Mine Production Information
Authors: Liu Xin Rui , Chen Peng , Chen Yong Sheng , He Qun , Ma Hong Bin
Published: June 2013

According to the intensive analysis of metal mine production information database and data characteristics, object-oriented database is primarily discussed to establish for metal mine production information with UML technique. Then the subsequent design idea and approach is presented on mine three-view drawing of metal mine production information system, taking the requests and rules of mapping in metal mine into account and applying the techniques of ObjectARX, to realize three dimension information visualization and automatic mapping of metal mine production information and mining design. In the whole process we cohered with experiences from engineering to do interactive improvement and develop simple and convenient system operation interfaces according with working habits of direct labor on production lines,which owns strong application significance and wonderful popularization value among metal mines at present.
Evaluations on Several National Injury Surveillance Systems
Authors: Zhang Kun , Wang Jin Xing , Mikami Yoshiki
Published: June 2013

On-line Queries were conducted on three injury surveillance systems implemented in Japan, the United States and the European Union. Attributes such as simplicity, representativeness, and data quality of each surveillance system were evaluated. The evaluation result shows that the system in the U.S. has a better performance.
Independent Verification of Proxy Multi-Signature without Random Oracle
Authors: Du He , Wang Jian , Guo Li Hong
Published: June 2013

Privacy has become one of the most important human rights of the modern age. In a proxy multi-signature scheme, the verifier need get all the original signers’ public keys together to verify its validity. However, the relationships between the proxy signer and the original signers would be leaked in the verification process. In this paper, we propose a secure proxy multi-signature scheme in standard model with the property of independent verification. In the scheme, the verifier can verify the signature using the public keys of the special original signers, rather than collecting all the original signers’ public keys.
Research of RFID System Security
Authors: Liu Guo Zhu , Zheng Xiao Kun
Published: June 2013

Radio Frequency Identification (RFID) technology has been gradually into our daily production and life as a new non-contact automatic identification technology.However , the limited resources of low-cost RFID largely restrict the implementation of RFID security mechanisms,which leads to personal privacy issues ,and the issues greatly hinder the rapid adoption of the technology.Here, RFID communication model and security requirements are discussed,and then it analyzes the security solutions for low-cost RFID systems.
Secure Symmetric Key Fuzzy Identity-Based Encryption
Authors: Liu Peng Tao
Published: June 2013

Symmetric key fuzzy Identity-Based Encryption (IBE) is a special type of IBE in secret key model. In this paper we extend the notion to the case of fuzzy Identity-Based Encryption, and give a formal definition of symmetric key fuzzy IBE and its security requirements. Moreover, we propose a construction of symmetric key fuzzy IBE based on the public key fuzzy IBE of Sahai and Waters, and prove its security.
Security Analysis of Square Minus Scheme
Authors: Yuan Feng , Ou Hai Wen , Xu Sheng Wei
Published: June 2013

The multivariate public key cryptosystem is a new and fast public key cryptosystem. This paper investigates the security of Square minus scheme, and presents a method to attack the scheme. The attack utilizes the affine parts of the private keys and the weakness caused by the structures of the private keys to find a large number of linear equations. The attack can recover the private keys efficiently when the parameters are small enough.
The Cracking Method of the Non-Touched IC Card
Authors: Wang Zhi Hong , Li Yin Suo , Zhang Geng Lu
Published: June 2013

The core principle of the operation of the non-touched IC card is the mechanism of the three times of identification. In the 16 sectors, the key and the control for storage and access of each sector are independent. With the key generated by the Crypto-1 privacy encryption algorithm, the location of the keys and the table of the control to storage and access are given beforehand. The Crypto-1 privacy encryption algorithm can be used to manage the information of the non-touched IC card by C# calling code in the managed execution environment or DLL calling code in the unmanaged execution environment. As a conclusion, the technical monopoly can be broke down by feasible methods.
Some Cryptographic Properties of Rotation Symmetric Boolean Functions
Authors: Huang Jing Lian , Zhang Chun Ling , Liu Ya Jing
Published: June 2013

Using the derivative of H Boolean functions and the e-derivativedefined by the authors as the research tools, we go deep into the internal structure of the Booleanfunction values​​, additionally,by the methods of cascade calculations and analytic combinatorics, cryptographic properties such as structural features, existence,balance and algebraic immunity of rotation symmetric H Boolean functions withdiffusibility are studied. Then we get the results that the Second Order rotation symmetric Boolean functionsare H Boolean functions,andthe results to the issues such asthe balance and algebraic immunity of rotation symmetric H Boolean functionsand the existence of the Third Order symmetric H Boolean functions are also be established.
Internally Vertex-Disjoint Paths in Crossed Cube-Connected Ring Networks
Authors: Yu Xin , Wang Gao Cai , Yu Yan
Published: June 2013

Crossed cube is a variation of hypercube, but some properties of the former are superior to those of the latter. However, it is difficult to extend the scale of crossed cube networks. As a kind of hierarchical ring interconnection networks, crossed cube-connected ring interconnection network CRN can effectively overcome the disadvantage. Hence, it is a good topology for interconnection networks. In this paper, we prove that there exist n internally vertex-disjoint paths between any two vertexes in CRN, and analyze the lengths of the paths.
Research and Design P2PSIP Internet Phone Systems Based on the Advanced Kademlia Algorithm
Authors: Zhang Meng Zi , Xie Bao Ling , Han Qing , Liu Kan
Published: June 2013

In order to solve the inadequate cache strategy of Kademlia algorithm and the updating of K-bucket, an optimized Kademlia algorithm was proposed. Based on this, a design scheme for P2PSIP VoIP was put forward, analyzed and tested by making experiments with simulation tools.
Simulation Study of Miniaturization Multi-Band Microstrip Antenna Design
Authors: Fan Xing Kai
Published: June 2013

A slot-loaded tri-band antenna was designed by electromagnetic simulation software, in which the parameter changes on the antenna centre resonance ratio, such as the location of the antenna coaxial feed point, the width, location, and the length of the slot, were studied. The results show that the length of the slot has the strongest influence on antenna centre resonance ratio.
Network Professional Resource Libraries Study and Practice for Higher Vocational College
Authors: Ma Yun Fang , Yan Jing Jing
Published: June 2013

Taking the higher vocational college students as the main study object, apply the network project management in network professional resource libraries construction and curriculum effective teaching, establish a process assessment mechanism, and then expanse students' initiative study consciousness, practical ability, innovation ability and professional extension ability.
Research on Internet of Vehicles and its Application in Intelligent Transportation
Authors: Huang Jian Ming
Published: June 2013

At present, the transportation industry brings energy consumption, pollution and traffic congestion is becoming more and more serious, which has greatly restricted the economic and social development. This paper elaborates the concepts of Internet of things, intelligent transportation, and Internet of vehicles; Internet of vehicles based on Internet of Things technology is considered as an effective method to solve road congestion. The key technologies of the Internet of vehicles include traffic information perception technology, network communication technology, and cloud computing technologies etc. among them, radio frequency identification technology, sensor technology, floating car data technology, and GPS positioning technology are the focus. Application of Internet of vehicles is discussed, and its future development is prospected.
DEM Simulation on Dilatancy Phenomenon of Confined Granular Assembly under Shearing in Parallel Interface
Authors: Wang Wei , Tang Zhan Qi , Gu Wei , Liu Kun
Published: June 2013

In order to study the dilatancy phenomenon of confined granular assembly under shearing in parallel interface, a parallel-panel shear model is constructed by discrete element method (DEM) in this paper. While the relative motion happens between the upper and lower panels, the panel and particles displacement are monitored. The expansion of upper plate and the change of particles force chain are shown. The results show that: the internal particle system keeps repeating the dilatancy and compression process, and the relationship between shear dilatancy phenomenon and force chain structure is close.
Design of (2, 1, N) Parallel Convolutional Encodes for VLSI
Authors: Duan Mao Qiang , Huang Xiao Li
Published: June 2013

The characters of more high speed computing and much less low power dissipation are needed to settle for convolutional encodes. In this paper, we present a parallel method for convolutional encodes with SMIC 0.35μm CMOS technology; hardware design and VLSI implementation of this algorithm are also presented. Use this method, parallel circuits structure can be easily designed, which take on excellent characters of more high speed computing and low power dissipation compared with traditional serial shift register structure for convolutional encodes.
The Research of Data Processing Method in a Client Oriented Body Sensor Network
Authors: Dong Yun Peng , Wang Ying Long , Yang Ze Jun , Huang Tai Bo , Zhao Chao
Published: June 2013

Body sensor networks(BSNs) are emerging cyberphysical systems that promise to improve quality of life through improved healthcare ,independent living for the elderly ,and reduced healthcare costs .In the BSN’s clients oriented family healthcare ,the methods of data storage and reading are important to data processing in BSN . This paper mainly studies the methods of real-time data storage in a BSN’s intelligent terminal based Android through the analysis of the client module’s architecture in a BSN .And an application model is finally designed to meet the need of mobile healthcare system’s data storage and reading .The application model is suitable for a BSN oriented family healthcare .Through testing this application model ,it indicates that this application model makes users more convenient to manage their medical data.
Analysis and Simulation Study Based on Cyclic Prefix
Authors: Zhang Lin Lin , Gao Bing Zhe
Published: June 2013

With the development of wireless technology, wireless network bandwidth is increasingly high require.OFDM modulation technique can be used to more fully utilize the available bandwidth.The paper studied the important role of the cyclic prefix in OFDM.We get the simulation figure when delay spread exceeds the cyclic prefix.Simulation results show that when cyclic prefix accounted 20%,the power loss is less than l dB,and information rate loss of up to 20%.But inserting a cyclic prefix can eliminate the influence of the inter-carrier caused by the inter-symbol interference and the inter-carrier caused by multipath interference.
Performance Evaluation of ZP-OFDM Scheme in Underwater Multipath Channel
Authors: Khan Rehan , Gang Qiao , Wei Wang
Published: June 2013

One of the major problems while dealing with underwater acoustic communication (UWAC) is the occurrence of unwanted multipath having long delay spreads. Higher probability of reflections (from wavy sea surface, uneven sea bottom, other obstacles, etc.) and refraction of sound are the main causes of these grievous multipath signals. Multipath effects further offer severe degradation in the packet (s) and mutilation of entire signal in terms of inter-symbolic interference (ISI) is occurred. During last decade, multicarrier modulation in terms of OFDM was considered as one of the viable solutions to mitigate the multipath effect and provide high-rate communication. In this article, we are performing the practical evaluation of Zero-Padded Orthogonal Frequency Division Multiplexing (ZP-OFDM) based communication system. The data using various packet structures are used to demonstrate the effectiveness of ZP-OFDM scheme in the flat multipath channel of the water pool of acoustic lab, Harbin Engineering University. Satisfactory performance results are obtained even within high noisy environment. These results suggest that ZP-OFDM is a viable choice for high-rate communications over multipath induced underwater channels.
Forward Predicting and Backward Verifying Tags Number Estimation in RFID System
Authors: Li Chang Bin , Li Hua , Wang Peng Wei
Published: June 2013

Tag collision happens when multiple tags are energized simultaneously, reflect their respective signals back to the reader at the same time, and the reader is unable to differentiate these signals. This problem causes decrease of the RFID efficiency especially in the tag-intensive RFID system. The dynamic frame slotted aloha (DFSA) algorithm is the most appropriate solution for this problem, which is based on an accurate tags number estimate method. A novel forward predicting and backward verifying adaptive precise tags number estimation algorithm is proposed in this paper. Experiment results show that it is more effective than others.
Development of Sampled-Data Interpolation Algorithm Software in CNC System Based on the Visual C++
Authors: Zhang Guo Zheng , Liu You Yu
Published: June 2013

Sampled-data interpolation algorithm is the core technology in CNC system. The principle of an arc interpolation is described, and the flowchart of an arc sampled-data interpolation algorithm is presented. The coordinate of arc-center is a key question that the formulas are inferred and to be ascertained in development of software. Finally, some of major and minor arc, the clockwise and counterclockwise arc of quadrants, development of these sampled-data interpolation algorithm software is displayed in CNC virtual simulation system based on the visual C++.
Study and Improvement of a Web Application Load Testing Model
Authors: Zhu Hua Ji , Wu Hua Rui
Published: June 2013

As an important indicator of Web application performance testing - load capacity is a key factor to judge the merits of the Web application performance, load testing model is an important premise to accurately obtain the Web applications load capacity; This article is based on the model of user groups, Through further analysis of the general user behavior , user groups model is been improved properly. The practical application shows that the improved model more realistically simulate real user behavior, and make the data more statistical significance, which can more accurately predict the performance of web applications. Keywords: Web applications, load capacity, performance testing, load testing, model
Study on the Influencing Factors of Gas Mixing Length in Nitrogen Displacement of Gas Pipeline
Authors: Kun Huang , Xian Yan , Shen Kun Rong
Published: June 2013

The gas pipeline commissioning replacement is a vital section before the pipes being put into operation. It is related to the gas mixture length of segment regardless the replacement method, the gas mixing length theory formula is derived based on diffusion theory and convection diffusion equation. Taking the impact factors of gas movement into account, with software FLUENT, this paper simulated different flow regimes, pipe length, diameter, velocity, back pressure and temperature to influence the gas mixing length, the general influence law of various factors is identified. That is the gas mixing length increases with the increasing of pipe length, diameter, velocity, back pressure and temperature, the corresponding mixing length and displacement time are longer at laminar flow. The research results provide theoretical basis for the natural gas pipeline commissioning replacement to determine reasonable parameters.
On Analyzing Examples of Structural Holes in the Potential E-Commence Community
Authors: Gan Ping
Published: June 2013

With social network analysis to deeply resolve the social network of users and the network of the thematic network, this thesis is aimed to explore the natures of the node and the Internet as well, find out the potential community, and deepen the analysis of the community, in order to obtain information of structural holes in community. Besides, the feasibility and utility of methods exerted in the thesis were illustrated by experiments. The study of the thesis supplies the help to the online shopping platform with figures theoretically and technologically. On the other hand, through investigating people’s interest in goods, the thesis is also based on to study the user’s investment and the optimization of the online shopping platform.
Pattern Analysis on Electronic Commerce of Agricultural Products
Authors: Guo Hong Yuan , Zhang Nan Nan
Published: June 2013

The paper firstly gives an analysis of the role of electronic commerce of agricultural products on agricultural development, and existing problems, and it raises the innovation of electronic commerce modes including the selection of P2B2C mode and P2G2B mode, and gives detailed suggestions such as setting up the third party e-commerce trade pattern, speeding up the construction of farmer agents, the construction of logistics system, and construction of agricultural standardization system.
Research on Method of Government Decision-Making of Traceability System Based on Logistic Model
Authors: Xu Xuan , Xie Lin Bo
Published: June 2013

Aimed at the modeling of governments public strategic decision-making, this article proposes a decision-making optimization model for the traceable food system. A welfare function of industry producers, whose parameters would be estimated by actual data gained from market survey and statistics analysis, is established based on the decision-making model in concern of mean value. Finally, the decision-making procedure is converted into a convex optimization problem, which is solved by the inner point method. Investigation shows that the optimal ratio of government subsidy to pay for the technology expenses of every unit is 0.82%, which would lead to an 11.72% increase of expected profit for the enterprise whose decision is led by the traceable system and having large productive scale and high sales prices. Thus the optimal condition can be obtained in the implementation of the traceable system. At the same time, any enterprise with a suitable vertical integration rate and owning quality verification systems will find that it is easier to establish the traceable system.
Virtual-Production Showing on E-Commerce Based on Cult3D
Authors: Wang Hai Hua , Xue Lin , Mei Shu Li , Li Li
Published: June 2013

E-commerce is regarded as the wonderful method to retailer to sell production. Then it is not enough to attract customer to simply provide picture and text of the merchandise. In this paper, both Cult3D and information management technologies are considered to show goods using 3D interactive model online. The file size of web3D model is small and the quality of image is high, which are benefit to internet access. Customer can get more information of the production with operational 3D model and feedback personal requirement.
The Enterprise E_Learning Training Systems Building Based on Constructivism Learning Theory
Authors: Wu Xiu Qin , Liu Tie Liang , Li Bing , Liu Xiao Ming
Published: June 2013

The enterprise E_learning training system is changing enterprises training concept and forms, and it has been public used by some developed countries enterprises, because its no limitation of teaching place, timely information transmission and tracking, high rewarding for investment, rapidly refreshment of course content and reusability and so on. This article sets up an enterprise E_learning training system based on the constructivism learning theory from the point of enterprise learning model. This system is divided into several son systems include learning management, resource management, teaching management and evaluation management, and describe the training systems running process and strategies in a detail way.
Research on the Training Mechanism of Embedded Software Development Talents
Authors: He Xian Bo , Li Ming Dong , Yang Li , Zhang Gang Yuan , Yue Miao
Published: June 2013

How to train embedded software development talents that can meet the demands of embedded system companies is a very important task to the computer majors of colleges and universities. Some efficacious measures are given in this paper. These measures include infiltrating embedded software developing ideas and knowledge to existed related computer major courses such as computer operation system, data structure and the principles of computer composition, offering specialized embedded software developing course, studying and researching open source embedded operating system software, and introducing students to participate in embedded software developing course design and application project. Our practical teaching results proved they are very helpful to improve students’ embedded software design ability.
Study on the Application of the QRcode Technology in the Farm Product Supply Chain Traceability System
Authors: Gao Hong Mei
Published: June 2013

Taking vegetables for example, this paper focuses on the study of the application of QRcode Technology in the farm product supply chain traceability system and the design of the QRcode-based traceable logistics information system for farm products, which applies QRcode technology in the transfer process of information flow in the vegetable supply chain, including planting stage, processing/packaging stage and distribution/retail stage, in order to achieve the tracking and tracing of each stage in the farm product supply chain.
The Application of Internet Platform in College English Teaching
Authors: Hu Bing , Zhang Jin
Published: June 2013

The traditional way in College English teaching can not satisfy the present needs of students. With the help of internet platform, the new teaching method can not only rich the teaching contents, but also stimulate the students self-study ability. The paper mainly focuses on the idea of applying the modern technology with the teaching requirements to enhance students communicative abilities.
The Optimum of Clearance for Mold in the Piercing Process with Finite Element Method
Authors: Yang Yu , Liu Cun Ping
Published: June 2013

Present work describes a piercing process in order to investigate the clearance of mold parameters and to obtain optimal clearance values for a given sheet material and thickness to be pierced, using the finite element method. The clearance was studied by simulating the piercing operation of a Q235-B sheet. The results of the present paper showed that clearance was the most influential factor for piercing, and numerical experiments was an effectiveness method to get optimal parameters of mold parameters, and the numerical experiment results showed that the best clearance could be got when the ratio of clearance and thickness of material was 0.11.
Free Vibration Measurements of Single-Lap Cantilevered SPR Beams
Authors: He Xiao Cong , Zhen Dong , Xing Bao Ying , Zeng Kai , Ding Yan Fang , Gu Feng Shou , Ball Andrew
Published: June 2013

Self-pierce riveting (SPR) is a new high-speed mechanical fastening technique which is suitable for point joining dissimilar materials, as well as coated and pre-painted materials. In this study, an experimental measurement technique was provided for the prediction of the free vibration behavior of single-lap cantilevered SPR beams. The dynamic test software and the data acquisition hardware were used in the experimental measurement of the dynamic response of the single-lap cantilevered SPR Beams. The frequency response functions of the SPR beams of different rivet number were measured and compared. The main goal of the paper is to provide a basis for further research on vibration based non-destructive damage detection in single-lap cantilevered SPR beams.
An Advanced Traveling Wave Matching Network for DC-12GHz Variable Gain Amplifier Design
Authors: Hu Shan Wen , Chen Tao , Gao Huai , Shi Long Xing , Li G.P.
Published: June 2013

A traveling wave matching (TWM) network is proposed for broadband variable gain amplifier design. The TWM network lessens input return loss and noise figure dependence on VGA’s gain, which is adjusted by biasing of the gain control circuit. A wide band (DC to 12 GHz) VGA with the novel TWM network as input matching is implemented in 2μm InGaP/GaAs HBT (fT of 29.5GHz) technology with die size of 1×2 mm2. As gain control voltage sweeps, the VGA shows a gain tuned from -15 dB to 15 dB and an average noise figure ranging from 8dB to 6.5dB, while S11 (lower than -20dB) and S22 (lower than -10dB) almost unchanged over the operation frequency band.
Review on the Technology of on Board DC/DC Conversion for EV Application
Authors: Wei Li , Liu Shuai , Zhan Di Fu , Cai Xu Ping , Li Zhi Dong , Xiong Yun , Ni Huai Sheng
Published: June 2013

The paper gives a systemic classification to the common electric vehicle (EV). The technology of low power converter using as auxiliary power supply and high power converter using for traction system has been deeply discussed from the view of topology, control strategy and devices. Finally, the development tendency of on board DC conversion technology is prospected.
Influence upon Kinematics Performance of a Family of 3-PRS Parallel Mechanisms Affected by Kinematic Chain Layout
Authors: Xu Yi Chun , Li Bin , Zhao Xin Hua
Published: June 2013

The influence upon kinematics performance of a family of 3-PRS parallel mechanisms affected by kinematic chain layout has been studied in this paper. Firstly, the locality arrangement parameters of single PRS kinematic chain are identified. According to these parameters values and their combinations, different arrangement of PRS kinematic chain are proposed, and variant configurations of 3-PRS parallel mechanisms are enumerated. Then, the inverse kinematic problems are solved, and the influential actions of kinematic chain layout on kinematic performance of these mechanisms are carried out. Simulation results illustrate that kinematic chain layout has direct influence upon kinematic performance of the 3-PRS parallel mechanisms.
Design and Analysis of Dual-Mode Double-Ring Resonator for Dual-Band Bandpass Filter Applications
Authors: Hsu Ming Wei , Her Man Long , Ko Wen , Wang Yu Lin
Published: June 2013

In this paper, two types of miniaturized dual-mode bandpass filters (BPF), a single-ring (SR) resonator, and a double-ring (DR) resonator are developed. By applying the capacitive-coupling technique to a dual-mode ring filter, a technique is proposed to miniaturize the dual-mode double-ring filter. An adjustable dual-band bandpass filter is achieved by developing a ring resonator where the two modes are capacitively coupled. Control of the filter center frequency is determined by the diameter of the ring and by the rings annular width. Filter coupling amount can also be adjusted by disturbance (perturbation) of an open stub attached to the annular disc. Proposed filters explore both single- and double-ring architectures. A single-ring resonator acting as a dual bandpass filter to allow 3.8 GHz and 7.8 GHz single is developed. A double-ring resonator to allow 2.05 GHz and 3.9 GHz signals is also developed. The ring resonators are fabricated on RO-4003 substrate, with relative dielectric constant of 3.38, thickness of 0.8 mm, and dielectric loss tangent of 0.0025. Results indicate the filters can be applied in the communications field.
Development of a Miniature Vapor-Compression Refrigeration System for Computer CPU Cooling
Authors: Yang Yu Fei , Yuan Wei Xing , Liao Yi Bin
Published: June 2013

A miniature vapor-compression refrigeration system for cooling high power CPUs has been developed and tested. The refrigeration system is so small that it can be embedded into the computer case. The refrigerant used in the system is R-134a. The system consists of a miniature rotary DC compressor, a micro-channel condenser, a specially designed cold plate, a short tube restrictor, and related controlling electronics. The compressor is powered directly by the 12V DC power supply of the computer. The cold plate contacts the CPU surface directly and carries away the heat dissipation by conductivity. In a series of tests to cool an Intel Core i7-990X CPU that has 12 cores inside with the refrigeration system, the CPU core temperature can be kept at 23°C in default frequency 3.5GHz and 100% of workload. When the CPU is overclocked to 4.8GHz, the core temperature can be maintained at 59°C. Even when overclocked to 5.0GHz, the core temperature does not exceed 78°C. The test results validate the ability and potential of using vapor-compression refrigeration technology in high heat flux CPU cooling.
A Fused Algorithm for Sovling VLSI Placement Problem
Authors: Zhang Ya Juan , Jin Zong Xin , Wang Xue Chun
Published: June 2013

Placement is the crucial step in modern VLSI physical design, and the result may decisively influence the follow-up wiring design. The advantages and limitations of the random optimization algorithm, ant colony algorithm, genetic algorithm, heuristic algorithm and simulated annealing algorithm which are used for placement optimization were analyzed in allusion to optimal search problems of VLSI placement. With a view to speedability of search, global convergence and the optimality of the solution, the initial placement is received through integrated use of all algorithms. In the meantime, the iterative improvement placement is realized by means of dynamic multi-branch tree. Practice has shown that the structure of the algorithm is clear, and it can also ensure the optimality of the received solution.
The Simulation of PbSe Quantum Dots Luminescent Solar Concentrator Based on GoldSim Software
Authors: Xu Tian Yue , Gao Wen Zhu , Zhang Tie Qiang , Bi Ke , Zhai Wei Wei , Zhang Yu
Published: June 2013

This essay uses the method of photon tracing to describe the simulation of PbSe quantum dots luminescent solar concentrator based on GoldSim software and optimize its size. We find that under the condition of size optimization, the photoelectric conversion efficiency of silicon solar cells which stick to the side of PbSe quantum dots luminescent solar concentrator can reach 32.5%. It explains that PbSe quantum dots are very suitable for LSC system.
Fabrication of a Polymeric Ridge Waveguide Filter Using a Replication Process
Authors: Hsu Fang Chang , Wu In Chung , Ho Chi Ting
Published: June 2013

The traditional wavelength filter only have one face of grating, the gratings length must be long enough to obtain good filtering result, so the filter device can not be made to a small size. We describe a procedure for rapidly and conveniently prototyping Bragg grating on the three side of the polymer ridge waveguide using holographic interferometry and micro-molding processes. In this experiment, the master of the periodic structure was created on an i-line submicrometer positive photoresist film by a holographic interference using a He-Cd (325nm) laser. A subsequent mold using polydimethylsiloxane (PDMS) polymer was cast against this master and used as a stamp to transfer the grating pattern onto a UV cure epoxy. The technique shows accurate control for the transferring of a gratings period and depth. It can obtain the filtering result with very short grating length which means that it can be made with a small filtering device.
Research and Evaluation of Local Dimming Algorithm for LED Backlight LCD Display
Authors: Zhang Xi Tiao , Liu Fen , Lv Guo Qiang
Published: June 2013

Based on the further study on the dynamic dimming algorithms, the Inverse of Mapping Function (IMF) method, the error correction method and the cumulative distribution function (CDF) method are analyzed and applied to get the dimming level in the bottom-lit backlight. 50 typical images are simulated. The power reduction, contrast ratio enhancement, and MSSIM are explored to evaluate the 3 above dimming algorithms, the simulation results show that: IMF method does not apply to the low average luminance images; error correction method is suitable for a wide range of images, but the energy-saving rate is not high; though the energy-saving rate of the CDF method is higher than the other two kinds of algorithms, the image quality has a some kind of distortion.
Cultural Design Method on Multi-Sensor Technology Design: A Case of Interactive Lamp Design
Authors: Ying Fang Tian , Cai Jian Xing , Wang Qi , Tao Ye , Chen Chao , Wang Ya Nan , Yao Cheng
Published: June 2013

Emotion has inalienablerelationship with culture. Nowadays, there is an increasing tread in designersto integrate culture elements in product designs. Based on previous emotional design theory,we made a thorough analysis from three levels respectively: visceral level, behavior level and reflective level and tried to work out a culturaldesign method with the purpose of integrating culture withtechnologically industrial design. Subsequently, to validate this method, we developed an interactivelamp design with multi-sensor technology, which called “Lightceremony”, inspired by a specialcultural element, tea ceremony.
Cooperative Medium Access Control in Distributed Wireless Sensor Networks with Multiuser Diversity
Authors: Li Zhi Wei , Zhong Qing Hua , Cui Hai Xia
Published: June 2013

This paper addresses the cooperative random access problem for distributed wireless sensor networks through network utility maximization framework based on persistence probabilistic model. To exploit spatial diversity, we also present a virtual link scheduling policy by employing multi-relay cooperative transmission and interference avoidance. Numerical results illustrate that our proposed cooperative medium access control (MAC) significantly improves the system throughput compared with the one based on deterministic model and the one without cooperative diversity.
The Software Design of Tropical Crops Monitoring System Based on ZigBee Wireless Sensor Network
Authors: Jin Zhi Yang , Wang Feng Xia , Liu Yan Xia , Li Wan Ping , Liu Hong
Published: June 2013

Aiming at monitoring the temperature, humidity and illumination intensity in the growing environment of a tropical crop---rubber tree, this article builds ZigBee wireless sensor network, and designs the software structure of this system based on fulfilling the hardware designing requirements. Combining Cluster tree algorithm in ZigBee network with AODVjr algorithm, this article enhances the use value of ZigBee wireless sensor network efficiently, and realizes that making use of ZigBee wireless sensor network technique in the tropical crops monitoring system.
Simulation Study on Time Synchronization Based on RBS in Wireless Sensor Networks
Authors: Xu Wan , Yang Guang You , Zhou Jing Jing
Published: June 2013

Time synchronization is important for wireless sensor networks. In this paper RBS time synchronization algorithm principle and EECH routing protocol are introduced, and the simulation of RBS on the basis of EECH routing protocol is realized using the Synsinc software. The average synchronization error of the simulation is 25.86 us.This value is basically same with other types of simulation, which confirmed the simulation is credible.
Design of Collection and Conditioning Circuit for a High Precision System of Photoelectric Velocity Measurement
Authors: Yi Chun Lin , Jia Yun Fei , Li Wang , Bai Yong Shun
Published: June 2013

In order to meet the requirements of high-speed projectile velocity measurement, design of a high-precision projectile velocity measurement device. Device adopts laser light source as detection target surface, receiving part adopts silicon cell array for photoelectric conversion. Silicon cell array using seamless splicing technology, eliminate the test blind spot. Design the sensitivity adjustable photoelectric conversion circuit, can effectively adjust the sensitivity of each pixel of the silicon photocell, effectively resolve the pixels sensitivity difference, reduce the jump poor in test, improve the projectile velocity measurement precision.
Research on Component-Based Noise Test System
Authors: Wen Cheng , Zhou Chuan De
Published: June 2013

Virtual instrument (VI) technology motivates test instrument going to multi-channel, high speed, automatic, micromation and intelligent. Component technology is able to decrease the period of developing instrument and increase the using repeatability of system. A novel noise test system based on component and virtual instrument is proposed in this paper. This system realizes all noise test functions designed, which demonstrates the advantages and feasibility of applying component technology to VI developing.
Research on Error Compensation Techniques for NC Machine Tools
Authors: Zhu Gao Feng , Zhang Yan Lei
Published: June 2013

Cause of machining error for NC Machine Tools is described, and principle of NC machinings error compensation on the basis of the existing in-line detection model of NC machine tools is analyzed in this paper. Regularity of error Modeling based on multi-body system is found,accordingly, we will find the corresponding characteristic matrix and transformation matrix if location features and sport features of the adjacent body are confirmed. Then, formula of error model is found, and we can get numerical solution and compensate error according to the identified error parameter. As a result, the machining accuracy of machine tools can be greatly improved.
Combined Prediction of Wind Power Using Multi-Dimension Embedding Phase Space
Authors: Wang Qiang , Yang Yang
Published: June 2013

In order to diminish the effect of reconstructed parameters to prediction of chaotic, a combined model for wind power prediction based on multi-dimension embedding is proposed. The combined model makes use of neural network method to achieve combination of several neural networks models based on phase space reconstruction, which can synthesize information and fuse prediction deviation in different embedding dimension, resulting in forecast accuracy improved. Simulation is performed to the real power time series Fujin wind farm. The results show that the combined prediction model is effective, and the prediction error of neural network combination is less than 7%.
Analysis and Model of SAR Radiometric Calibration in Near-Space
Authors: Tian Song , Song Jian She , Yang Tie Jian , Wang Lian Feng , Zhou Bao Shun
Published: June 2013

Radiometric calibration of synthetic aperture radar (SAR) is an important work related to pixel values and the backscattering coefficient of ground targets. With a consideration of the difference between near space and spaceborne, airborne platforms, this paper proposes the radiometric calibration method which is applicable to near space platform. A radiometric calibration model of near space SAR is established, and it is analyzed and validated by experimental data.
Forced Consensus of Multi-Agent Systems with Directed Communication Topology and Interval Time-Varying Delay
Authors: He Ming Kai , Wang Jun Wei
Published: June 2013

This paper is concernedwith forced consensus problem for directed multi-agent systems with intervaltime-varying delay, whereall agents approach a constant reference trajectory under the condition thatonly a subset of the agents can receive information from the reference state. Thetime-varying delay is assumed to belong to an interval with known lower andupper bounds, but its lower bound may be greater than zero. We first propose a consensusalgorithm that extends the existing results in the literature to account forinterval time-varying delay. Then, the consensus stability analysis isconducted by introducing an appropriate Lyapunov-Krasovskii functional and using Jensen inequalitytechnique. A delay-range-dependentstability criterion is derived in terms of linear matrixinequalities, which can be efficiently solved by the interior-point algorithm.Finally, simulation examples indicatethe capabilities of the proposed algorithm.
A New Method for 3D Reconstruction of Headlight Contour
Authors: Tao Fei , Mu Ping An , Dai Shu Guang , Shen Jia Xing
Published: June 2013

This paper put forward a 3D reconstruction method of the headlight contours based on laser scanning technology and robotics. Firstly, according to the present three-dimensional measurement techniques, the article put forward a set of headlight contour detection method based on the analytic geometry model and the line laser source scanning principle. It establishes a 3D scanning model and coordinate transformation model for 3D reconstruction of the headlight contour. Secondly, according to the demanding accuracy it structures the 3D reconstruction system. Finally it realizes the 3D reconstruction of the headlight contour based on the method, and the result is tested and evaluated matching effect, the result shows that can effectively realize the 3D reconstruction of headlight contour and the method has a good stability.
Research and Development on Simulation System of Virtual Resolvers
Authors: Zhang Guo Zheng , Han Jiang
Published: June 2013

To change the phenomenon of "Being an armchair strategist" in current research for resolver, a simulation system of virtual resolvers is researched adopting virtualization. The fundamental principle of resolver and the developing strategy of simulation software are expatiated. Some common problems in the system developed are solved, including the way of real-time updating image, the rotor-rotating method, and the approach of adjusting parameters. In addition, examples of phase discrimination resolvers and amplitude discrimination resolvers are provided separately. This paper provides a worthy auxiliary instrument for resolvers to be researched.
Rapid Algorithm of High Risky Position on Car Hood for Pedestrian Crash Based-Computer Simulation
Authors: Li Zheng Bo
Published: June 2013

ntroduction This paper has proved that the HIC of local Car hood crash area is relative to the distance between the crash point and potential secondary crash point, and with the rigidity of the second crash point, in the process of protection for pedestrians. The pertinence formula was built and the high risky spot of each local crash areas was doped out quickly, and the accuracy of the formula is validated by the subsequent real car crash test. When the vehicles and the pedestrian have the crash accident, the pedestrian casualty rate is very high, develops the pedestrian to protect the research positively, particularly the forehead crash trouble-free service, regarding the guardian vehicle crashs in weak one the pedestrian, has the very vital significance.
Daqing Oilfield Sanan Putaohua Reservoir Sedimentary Microfacies Research
Authors: Yan Bai Quan , Zhang Dong , Gao Er Shuang
Published: June 2013

Putaohua reservoir is the principal producing formation in the Daqing oilfield sanan block. The spatial distribution of single sand body is particularly important for the residual oil tapping in the middle-late stage of oilfield development. The paper studied sedimentary microfacies of Putaohua reservoir in the area, established high-resolution sequence stratigraphic framework of the area and a typical single sand body logging phase mode on the basis of logging features, finely portrayed single sand body type and spatial distribution on this basis, laied the solid geological foundation for the oilfield subsequent residual oil tapping, provided a scientific geosteering.
Point Bar Numerical Simulation and Results Analysis of x-Unit in the Daqing Oilfield D Block
Authors: Zhang Dong , Yan Bai Quan , Gao Er Shuang
Published: June 2013

Point bar reservoir is the key development object in the late stage of oilfield development at present. In this paper, numerical simulation is done on the basis of the point bar architecture in the modeling of the point bar. Through dynamic data generating simulated well history and acquiring X-unit splitting factor, history matching is done on this basis. The numerical simulation results reveal that oil saturation has belt distribution characteristics on the pane due to the lateral accretion interlayer affect to the oil-water displacement; injection wells transverse spread is limited by the lateral accretion interbed control; by lateral accretion interlayer updip pinchout control, the remaining oil is mainly located in the middle and upper part of the lateral accretion [1,2]. Because of the above characteristics, taking horizontal wells to develop the top remaining oil of point bar has been very good results. And it has been confirmed by the further results of the numerical simulation.