bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Implementation of Virtual Logistics Storage System
Authors: Bai Zheng Min , Li Yao Hui
Published: June 2013

It proposes an interactive logistics warehousing system solution based on virtual reality technology by the actual logistics warehousing system. The system, employing the improved MVC framework of software design patterns, builds virtual environment model and logistics warehousing 3D model by 3dmax and Pro/E, meantime, achieves Warehousing and outbound operation in inventory management by using SQL database technology. In addition，it overcomes some interactive insufficiency on the VRML through Java3D, and solve some key problems. Therefore, it has a certain practical value and broad application prospect.
The General J2EE-Based Enterprise Information Platform
Authors: Huan Shi Yu
Published: June 2013

A Enterprise Application Integration system named Enterprise Information Platform is designed and implemented in a J2EE environment to ensure data share across any operating system and network. Based on message mechanism, JMS is used to transfer message and XML is chosen to organize the format of communication data which can provide services and application programming interfaces to integrate heterogeneous data. This system has been successfully used in some enterprise, and its generality, openness, multiplexing and extensiveness has also been proved in practice.
Discovery Algorithm of Classification Characteristic Rule Based on Cloud Database
Authors: Zhu Tian Xiang , Zhang Dan , Liu Xin , Ma Guang Kun
Published: June 2013

Massive data stored in a cloud database, in which lots of potential and valuable knowledge exist. In this paper, the data model of the cloud database is analyzed. Through analyzing, classifying, the common features of the data are extracted and form a feature data set, from which the new knowledge can be found. In the paper, the basic model based on the classification characteristic rules of the cloud database is defined, and the discovery algorithm of the classification characteristic rules is presented.
Numerical Study on Initial Field of Chemical Oxygen Demand with Adjoint Method
Authors: Wang Chun Hui , Shen You Li , Lv Xian Qing
Published: June 2013

Based on the simulation of a marine ecosystem dynamical model in the Bohai Sea, pseudo observations are assimilated to study the initial field of chemical oxygen demand (COD) by using the adjoint method. The three-dimension Princeton Ocean Model (POM) is used to calculate the ambient physical velocities, and only four tidal components (M2, S2, K1 and O1) are taken into account. First a prescribed initial distribution of COD is given. Run the forward model and we can pickup some pseudo observations. Then a set of twin experiments were designed to validate the inversion capability of this ecosystem dynamical model. It was discovered that no matter which form the initial field was, the adjoint method could reduce the misfit between inversion results and observations significantly, indicating that this model was stable and reliable. Therefore, this model could be applied in real experiment to simulate the initial field of COD in the Bohai Sea in future.
Athletes' Physical Function Study on the Construction of Digital Archives
Authors: Gong Zhi Gang , Ma Xiao Ben
Published: June 2013

Physical functions digital archive, principally consisting of basic personal information and evaluation information, is the management process of body functional standard and scientific record, which makes it easy for sports teams and sports research institute to compile and use the digital files. Functional digital archive has a high density of data accumulation and store, transmission of shortcut, information intelligent retrieval, dissemination of intelligence, sharing of information resources and so on. Its requirements in standards, test method, recording method, recording and upload format for uniform and management modes take into account authorization and security.
Research and Design of National Basic Research Management Information Data Center
Authors: Shao Zheng Long , Yuan Fang
Published: June 2013

The accumulation of basic research management information is an important foundation for the continuous development of scientific research, is the important strategic resources of science and technology innovation, economic development and national security, and is the important basis for government departments to formulate policies and make scientific decision. According to the situation of basic research management information, this paper proposed the overall architecture and implementation plan of national basic research management information data center, combined with the key technologies in the construction of data center. By this architecture and plan, a national basic research management information data center with centralized management, ordering specification, reliable sources and fully sharing can be constructed.
A DCT-Domain System for Digital Watermarking
Authors: Liang Yan , Yan Gao , Qi Chun Xia
Published: June 2013

Digital watermarking has been proposed as a solution to the problem of copyright protection of multimedia data in a networked environment. It makes possible to tightly associated to a digital document a code allowing the identification of the data creator, owner, authorized consumer, and so on. In this paper a new DCT-domain system for digital watermarking algorithm for digital images is presented: the method, which operates in the frequency domain, embeds a pseudo-random sequence of scrambled image in a selected set of DCT coefficients. After embedding, the watermark is adapted to the image by exploiting the masking characteristics of the human visual system, thus ensuring the watermark invisibility. By exploiting the statistical properties of the embedded sequence, the mark can be reliably extracted without resorting to the original uncorrupted image. Experimental results demonstrate that the watermark is robust to several signal processing techniques, including JPEG compression, cut, fuzzy, addition of noise, and sharpen.
A Study of Vulnerability Detection and Prevention on Computer Network Security
Authors: Yang Xiao Hong , Chen Yue Feng
Published: June 2013

With the rapid development of computer and network technology, the security of computer network becomes the most important issue. For the computer network, it not only takes convenience to us, but also takes troubles, such as network security, virus, cockhorse etc.. In this article, we analyse the cause of the security,and then introduce a number of measures of vulnerability detection and protection on computer network security.
An Information Hiding Method in Presswork Based on Image Complexity and Template Matching
Authors: Wang Cai Yin , Cai Jun Sheng , Zhen Ming Jie
Published: June 2013

This paper proposes an information hiding method in presswork based on image and complexity and template matching. First, the message to be hidden is coded by using BCH to facilitate the extraction of hidden information. Secondly, Based on appropriate image block partition, the local image complexity of the block is calculated, which is determined whether to embed watermark in this block. Watermark is embedded on the mid-frequency spectrum in DFT domain. Thirdly, two structural template lines are added in the polar coordinate system for detecting any combination of the geometrical distortions. Then, the hidden data can be extracted without using the original image. The experimental results indicate that the proposed method is robust after high-quality laser printing, offset printing and scanning.
ZnSe Thin Film Buffer Layer for CIGS Solar Cells Deposited from Chemical Solution with Variety Complexing Agents
Authors: Chen Liang Yan , Fang Chao
Published: June 2013

Chemical solution deposited ZnSe thin films can be proper buffer layer of Cu(In,Ga)Se based solar cells in substitution of CdS for environmental consideration, and complexing agents played vital role in chemical solution deposited ZnSe. Ammonia, hydrazine hydrate and triethanolamine have been applied as the complexing agents in chemical solution precursor to get the ZnSe films. Microstructure of the obtained ZnSe films were characterized and the growth property of films with variety complexing agents have been investigated to explorer the state of art in Cu(In,Ga)Se based thin film solar cell fabrication.
Study on Information Security Monitoring Framework
Authors: He Ning
Published: June 2013

As malware has become increasingly sophisticated over the past several years, it is no longer unusual to see it disable critical security services on a victims machine. In our threat model, we assume the attacker can compromise the users OS and any application running inside it. The results show that our threat model makes an introspection assumption stating that the OS and application level data structures in the User VM memory have not been altered, it is still instructive to consider what it would take to perform this type of attack, and the most security critical data is located in the User OS kernel.
The Research and Application of an IPv6 Firewall Based on Netfilter
Authors: Huang Cheng Quan
Published: June 2013

Now IPv6 has been considered as one of the core standards for the next generation Internet Protocol. The network behavior and attack are quite different in IPv6 environment because of the difference between IPv4 and IPv6 Protocol. The increasing expansion of network scale and the exponential growth of network application are urging the research that a firewall for IPv6 environment should be deployed and implemented. This paper studies Netfilter architecture in detail, and explores the Shorewall6 firewall source codes. Furthermore, an IPv6 firewall based on Netfilter is implemented by modifying the Shorewall6 firewall source codes and adding some iptables rules according to the application environment. The implemented IPv6 firewall based on Netfilter makes it convenient for administrators to simplify IPv6 network administration tasks and has furthered the development of IPv6 firewall to some extent.
Operating System Choice of the ISCS Server in Urban Rail Transit
Authors: Su Jun Feng , Kuang Fu Hua , Xu Bu Gong
Published: June 2013

Server operating system of the integrated supervisory control system (ISCS) in urban rail transport is very important, this article analyzed and compared the main server OS Unix, Linux and Windows server from security, reliability, ease of use and cost. Finally using the Shenzhen Metro 3rd Line as an example, summed up that current the server operating system of the ISCS system will continue to Unix and Windows Server-based, and gradually transitioned to Windows Server.
Study on the Mobile Information Service in the University Library
Authors: Li Dan
Published: June 2013

A new mobile information environment has been gradually formed with the rapid development of the computer network technology in the world. In this environment, the mobile information service in the university library is able to meet the changing need of readers for the specific information online and need not visit libraries. The potential demand, opportunities and challenges of the mobile information service in the university library are analyzed respectively. At last, some advices are proposed to provide a better mobile information service in order to meet readers’ need for information in today's society.
Broad Null Steering by Phase only Perturbation Using Immune Algorithm
Authors: Ye Jian Feng , Wang Yu Feng
Published: June 2013

Investigations on broad null steering by only phase perturbation are presented in this paper using immune algorithm (IA) for linear array. Broad null steering in antenna pattern helps to reduce channel interference due to less energy being transmitted at unwanted directions. Phase controlling for broad null steering is relative easy realizing comparing with amplitude or elements’ position controlling. IA is an efficient approach to escape from local convergency for muti-objective optimization with the antibody colony’s diversity is enhanced by using Logistic mapping for initial colony and Gauss function for mutation operator. In this paper, excitation phases are setted as antibodies optimizing for steering broad nulls with specified width at specified directions. Well simulation results show the availability of broad nulling by phase only controlling and the superior global search capability of the improved IA.
Context Aware Technology Based on Active Mechanism for Large Scale Sensor Networks
Authors: Dong Biao
Published: June 2013

This paper analyzed context aware technology of the computing and applications for large scale sensor networks (LSSNs), proposed the establishment of context aware technology based on active mechanism, and presented active capturing service (ACS) and active knowledge discovery service (AKDS) in computing and applications for LSSNs. The results shows that active mechanism based on event-condition-action (ECA) rules provides an event detection model that suits many classes of applications in ACS and AKDS.
A Dynamic Model of Hierarchical Application Layer Multicast Tree Node Failure Epidemic
Authors: Chen Hua Sheng , Qi Yong , Li Wei Hua
Published: June 2013

Failure Detection periodically detects node validity to maintain application layer network stability. The detection cycle interval value is a key parameter for detection scheme performance; there have been few studies on models of analyzing cycle interval value affecting the scheme. We propose a dynamic model of hierarchical application layer multicast tree node failure epidemic SIRS (NFE-SIRS). The NFE-SIRS analyzes statistical node failure in hierarchical application layer multicast tree structure, and models relationship between cycle interval value and detection scheme repair behavior, finally obtains the expected cycle interval value to improve detection scheme performance. Simulation shows that, the NFE-SIRS can dramatically improve detection scheme performance compared with common fixed cycle interval detection scheme.
Generalized Fuzzy α-Ideals of BCI-Algebras
Authors: Zhang Xiao , Sun Shao Quan
Published: June 2013

In this Paper, the Concept of Generalized Fuzzy α-Ideal of BCI-Algebra is Introduced. the Following Results are Obtained: for a BCI-Algebra X, any Generalized Fuzzy α-Ideal of X must be a Generalized Fuzzy Ideal; a Fuzzy Set A of X is a Generalized Fuzzy α-Ideal of X if and only if for all t∈[λ,μ], At is either Empty or an α-Ideal of X; Suppose that A and B are Generalized Fuzzy α-Ideals of X, then so are A∩B and A×B. also, a Characterizations of Generalized Fuzzy α-Ideal is Given.
P2P Overlay Network Based on Resource Routing Table
Authors: Ma Hui , Zhang Zhi Li
Published: June 2013

In unstructured P2P network, mismatch between logical topology and physical topology cause communication latency increasing and network load heaving. Consider the position and attribute of peers, the issues proposed a three layers mixed P2P network model. In the model, neighbor peers form domain, peers with the similar character compose groups in every domain. In the third layer of model, resource routing table is introduced to performance resource searching cross-domain. Simultaneously, P2P network dynamic adaptability is described detaily. Simulation result show the model can effectively shorten resource search delay and reduce the network load.
Research on FlexRay Bus Software Testing Technology Based on Data Acquisition and Analysis
Authors: Chen Zhong Wei , Li Xiao Xia , Du Song Yang , Xiang Liang
Published: June 2013

This paper mainly introduces FlexRay, a high speed, real-time and high reliability bus technology, and researches network topology structure and network communication protocol of FlexRay bus. Then this paper points out that the premise of analyzing FlexRay protocol is catching the bus data transmission, and designs a data acquisition and analysis system with FreeMASTER software and Tektronix TDS3012B digital phosphor oscilloscope. In order to verify the accuracy of the software FlexRay interface design, this paper also describes the analysis and verification procedure of the timing sequence of FlexRay bus. Lastly, this paper reminds of the application prospect of this system.
An early Intelligent P2P Traffic Identification Method
Authors: Peng Jian Fen , Tu Xu Yan , Wang Hong Bing , Zhou Ya Jian
Published: June 2013

In order to identify P2P traffic quickly and accurately as early as possible, an early intelligent P2P traffic identification method(EIIC) is proposed, which uses the size of early three packets payload and server port number obtained from the TCP flow as flow feature and classifies the traffic based on C4.5 algorithm. The results show that EIIC satisfies the following conditions: extracted features used, training samples selected under the unbiased conditions, it can be adaptive to actual network conditions and early classify the Internet traffic into application among WEB, MAIL, BitTorrent and eMule categories efficiently and quickly.
Design of Urban-Taxi Accurate Call Service Platform Based on Information Self-Matching
Authors: Zhao Lin , Xing Jian Ping , Sun Cong Yi , Sun Can , Xie Chun Liu
Published: June 2013

In order to solve the difficulty of calling a taxi for urban residents, and reduce taxi no-load rate for taxi drivers, an Urban-Taxi accurate call service platform based on information self-matching was designed and realized by using wireless communication and combination positioning technologies. This platform can achieve real-time monitoring and management of the entire service area. By using a terminal, a passenger can book the nearest no-load taxi and wait for loading. Meanwhile, a taxi driver can use his or her terminal to get passenger’s information who wants to take a taxi. This approach simplifies calling process of passengers, matches passengers and no-load taxis intelligently, optimizes passengers travel experience, and reduces taxis no-load rate.
QoS Oriented Traffic Modeling of Mobile POS Service in Cellular Network
Authors: Liu Rong Duo , Wu Wei , Du Jia Dong , Xin Wei , Yang Da Cheng
Published: June 2013

The market potential of mobile point of sale (POS) service is attractive to the mobile network operators, while the traffic challenges caused by heavy traffic is becoming a critical issue to the operators. In order to guarantee the Quality of Service (QoS) and make best use of the existing network, it is important to model the traffic of mobile POS service. A tree-structured modeling method is presented in the paper, which can be used to model the traffic of mobile POS service as well as other interactive M2M services, such as remote medical services. The modeling method is a combination of the layered modeling method used in traditional H2H communications and the transaction tree modeling method used in bank trade. As another main point, a specific traffic model of mobile POS service is given in the paper. There are five parameters in the traffic model, including request packet size, response packet size, the interval between request and response, the interval between two requests, and the transmission probability. After counting the packet length of each message, calculating the average length, analyzing the effect of difference between the actual and average length on the cellular network, we find that all the request type of mobile POS service could be simplified as the average length. Further on, a curve-fitting method is used to obtain the distribution of the intervals. All the data used in the modeling are collected from the traffic of real network. The QoS attributes assumption of mobile POS service including the maximum accessing user number, the packet loss rate and the end-to-end delay is given in the article and is validated by the simulation using the specific model of mobile POS service provided in the paper. The assumption is consistent with the simulation result, and is proved to be reasonable. The results can be used as a reference when implementing mobile POS service in cellular network.
Simulation of the Gas Flow Sensing Probe Based on Silver-Coated Fiber Bragg Grating
Authors: Zhu Wen Jun , Cheng Jia , Huang Zhen Wei , Zhou Yan , Xie Dai Liang
Published: June 2013

A novel gas flow sensing probe based on silver-coated Fiber Bragg Grating (FBG) is proposed. A square hole was fabricated in the middle of a capillary stainless steel pipe. A silver-coated FBG sensing probe was fixed up between the hole. The diameter of the silver-coated FBG sensing probe is only 0.125 mm, with the PVC materials deposited around the surface of the both ends with a diameter of 0.9 mm. Simulations on different packages of sensing probe were carried out via Finite Element Method (FSM). Results of the simulations reveal that the sensing probe of the capillary stainless steel pipe with a diameter of 3 mm and the square hole with a length of 12 mm can provide the best performance.
A Study on Turbo Codes and Rake Received Mixed Algorithm in Multipath Fading Environment
Authors: Wang Jin Peng , Zhu Qi Ming , Cao Fan , Li Ping , Zou Nian Yu
Published: June 2013

In this paper, a Turbo codes and Rake received mixed algorithm in multipath fading environment is proposed to solve the problems in signal reception in a fading environment of the mobile communication system. Compared to the traditional multi-path reception methods, the advantage of the algorithm can significantly improve system performance; reduce the system error rate by approximately 2.5dB. Moreover, the performance of the system will be improved a lot if the antenna power is equal. Firstly a mixed algorithm in AWGN channel and multipath fading channel is introduced and derived theoretically and then a computer simulation is carried out and the impact of various parameters on network performance is anglicized. The results show that the algorithm can effectively reduce the effects of multipath fading environment on the transmission power attenuation, lower bit error rate, and improve the effectiveness to resistance to multipath fading significantly.
The Research of Wireless Mesh Network Routing Algorithm Based on Interference Model
Authors: Guo Xing Ge , Tang Jin , Du Rui
Published: June 2013

On the basis of interference model, the article puts forward a self-adapting routing strategy of Wireless Mesh Network, which can significantly improve the efficiency of the routing by choosing a minimum interference path. Due to regularly-distributed self-adapting adjustment and load balance, the routing can adapt to the dynamic network environment. The simulation shows that IBAR can significantly improve the throughput performance compared with the traditional AODV and HWMP protocols.
Research on WLAN and Ad Hoc
Authors: Sun Wen Feng , Yu Ren Shi
Published: June 2013

Competition from all walks of life is more and more intense. So WLAN obtains a wide application. However, the main disadvantages of WLAN, coverage scope, movement speed and capacity of communication, are still unavoidable problems. Ad hoc is a good compensation for the main disadvantages of WLAN with its main advantages such as good extensibility, fast movement speed, great capacity of communication, etc. In this paper, WLAN and Ad hoc are introduced in detail, and then integrated according to their respective character. Finally, some main advantages of integration of WLAN and Ad hoc are listed.
IPv6 in IPv4 Virtual Private Network Based on Virtual Devices in Vehicle Information System
Authors: Qu Liang Dong , Cui Xin Yu , Liu Xiao Nan
Published: June 2013

Vehicle information system is the data center of vehicle communication networks, for the sake of connecting the IPv6 host through IPv4 network area, a virtual network device (VND) in Linux embedded System is designed and implemented as a mid-layer module between the real device driver and internet protocol stack. The VND can establish a virtual tunnel between the vehicle information device and agent server. Both vehicle information device and agent server can support IPv4 and IPv6.Through the virtual tunnel, the agent server picked up the IPv6 packet which was built in IPv4 UDP data area, and transmit the IPv6 packets to the IPv6 remote server. So it works like a VPN device. The hardware platform of the vehicle gateway is based on ARM9, and the software is based on ARM-Linux. The instruction of hardware and software are as well as put forward.
Design and Simulation of 2PSK Modem
Authors: Li Peng Fei , Li Jin Ping , Zhao Xin
Published: June 2013

Based on the principle of the modulation and demodulation of Binary Phase Shift Keying(2PSK),a mathematical model for the modulation and demodulation of the 2PSK was built and the carrier signal was designed using the technology of Direct Digital Synthesis (DDS).Then,a model to simulate the hardware circuit of the modulation and demodulation of 2PSK was built,and then analyzed in Matlab and Modelsim.Simulation results show that the model not only properly realizes the function of 2PSK modulator-demodulator,but it also simplifies the hardware circuit and reduces the programming time.
Learning-Sphere Curriculum and Course Development of "Java Web Application Development" Based on Working Process
Authors: Yan Jing Jing , Ma Yun Fang
Published: June 2013

Learning sphere and course development in higher vocational education is based on working process. This paper presents a comprehensive course development methodology of "Java Web Application Development" according to the characteristic of learning sphere and course development, as well as from the software engineering perspective. The goal is to efficiently cultivate higher technical talents.
The Optimal Utility of Increasing the Integration Test Coverage Based on Multiple Attributive Decision Making (MADM)
Authors: Zhang Yi , Wang Gang
Published: June 2013

With the increase of softwares scale and complexity, peoples awareness of software quality guarantee gradually become stronger. The software engineering is faced with the practical problems of how to conduct softwares test, optimize the test, select the test act and increase the test effect. With multidimensional indexes of the test coverage, this study puts out an optimizing act which uses integration test coverage, test coverage satisfaction rate and test efficiency as the utility properties. The multiple attributive decision-making act of selection algorithm is used to measure the optimal act, reducing the dependency of subjective experience in testing, providing a rational and effective instruction for test.
The Design of Embedded C Language Editor Supporting Control Flow Detection Algorithm
Authors: Han Xue , Suo Xiang Feng
Published: June 2013

By designing high reliable modules with special functions, the paper realizes the identification to security compiler expansion grammar, shows compiling information of the control flow testing level and supports grammar security subset; it also achieves the grammar highlights of a variety of highly reliable security algorithm by using the dynamic profile approach, which provides more safety guarantee to the development of embedded systems from its beginning.
Group Buy Website Studies Based on Factor Analysis and Cluster Analysis
Authors: Jiang Yun , Wang Chong , Chen Dong
Published: June 2013

By collecting the major group buy websites data, this paper using factor analysis and cluster analysis in data mining methods to analysis it, classify the group buy website, find and analysis the group buy website operating key strategy.
Analysis of Crane Ship Lifting Load Swaying Character with Multi-Factors Coupling
Authors: Ren Hui Li , Fu Ling , Li Pan , Gao Chang Chun
Published: June 2013

Nonlinear movement will be generated on the crane ship lifting load with multi-factors coupling such as marine environmental loads, mass of load and the length of wire rope. The thesis bases on the technique of virtual prototype to establish a rigid-flexible multiply model of the crane ship with utilizing the software platform of ADAMS and ANSYS. Through analyzing the characteristics motion of the lifting load, providing a basis for the effective control of the crane ship lifting load.
Supplier Selection Method of Complicate Product Development
Authors: Zhong Jin Hong , Bai Yang
Published: June 2013

For supplier selection of complicate product development, manufacturer concentrates on the supplier performance in future product and its development, which is of more uncertainty and cannot adopt certain measure. So we construct a BN model that is comprised of criteria layer, factors layer, cost items layer and the total cost. Furthermore, we verify the effectiveness of the proposed method by a computational example.
Simulate the Process of Nitriding Depth on the Surface of Titanium by Mixing Laser and Nitrogen Plasma Nitriding Approach
Authors: Zhao Guo Jian
Published: June 2013

An approach by mixing laser and plasma to conduct nitriding treatment on the surface of titanium can improve the surface hardness, and the hardness of the surface in different nitriding depth is different. We wrote a program, by which we carried out Monte Carlo simulation calculation, in accordance with the model description by C language. In the calculation process, by changing laser power intensity, scanning velocity, nitrogen ion energy and angle of incidence, we got the distribution of nitrogen ions in iron under different conditions, and thus formed computer simulation diagram of titanium nitride process.
A Theoretical Study of the OH + HN2 Reaction
Authors: Xiang Tian Cheng , Si Hong Yan
Published: June 2013

The singlet potential surface of the OH + HN2 reaction has been investigated at the B3LYP/6-311++G (3df, 3pd) level. The single-point energy calculations are performed at the high-level CCSD (T) / 6-311++G (3df, 3pd) for more accurate energy values. DFT calculations show that the most favorable association way starts with a barrierless addition of the OH to HN2 leading to HNN-OH (im6). The adduct im6 goes through an H shift from N atom to O atom, forming the product of H2O and N2.
Review of High Power DC/DC Soft-Switching Converters in Electrical Vehicles Application
Authors: Liu Shuai , Wei Li , Zhang Yi Cheng , Yao Yong Tao , Xiong Yun , Zhang Tong
Published: June 2013

The application of soft-switching techniques is an important way to reduce switching losses of DC/DC converter. Aiming at the requirement of electric vehicles application, major soft-switching techniques for DC/DC converters are reviewed. Performance and design limitations are discussed. A comparison of soft-switching techniques used in high power converters of electric vehicles is presented. Through analyzing the state-of-art and existing deficiency of soft-switching techniques for DC/DC converters, it is concluded that power level upgrading, soft-switching range extending and auxiliary network simplification should be focused in the future.
High Security Entrance Access Control System Design Using ISO 14443-A Standard
Authors: Wang De Ming , Ding Yan Yu , Hu Jian Guo , Tan Hong Zhou
Published: June 2013

RFID has been widely used in high security applications due to its contactless characteristic and security mechanism, such as e-ticket, e-money, e-key and so on. Since magnetic stripe card and traditional Mifare RFID card can be broken, it is a general trend to change them with CPU card. Based on the above fact, an entrance access control system is proposed in this paper using ISO/IEC 14443-A standard to replace some unsecure card. The following measures were introduced: 1, to design a kind of RFID reader which can be easily installed on the entrance; 2, to introduce PSAM card and its security function; 3, to design a security authentication mechanism using random number and 3DES encryption algorithm. With this system, the access control becomes more security and manageable, the proposed system is cost efficient and is successfully used in some companies.
A Novel Pre-Amplifier for DTH in Folding and Interpolating ADC
Authors: Han Jing Lei , Zhang Wen Lian , Shao Zhi Biao
Published: June 2013

A pre-amplifier for distributed track and hold (DTH) circuit in high speed and high resolution folding and interpolating analog-to-digital converter (ADC) is proposed. This scheme resolves several limitations of conventional differential difference pre-amplifier (DDPA) in low voltage supply, compared to the conventional DDPA, the proposed scheme increases the input range so that all DDPAs of DTH can operate effectively, improves the averaging effect of average network, saves the random offset voltage from device mismatch, decreases the gain error of DTH, reduces the output common-mode (CM) deviation of DTH, and enhances the CM rejection of DTH. Based on SMIC 0.18μm CMOS technology and 1.8V power supply, over the input range, results from spectre shows dummy DDPAs of DTH operate effectively, the offset of output CM voltage of DTH decrease to less than 2mV, gain error decrease to less than 1%, the gain of middle novel pre-amplifier and boundary novel pre-amplifier are both 2.5, bandwidths are all above 1.9GHZ, while power dissipation of each DDPA is 3.22mW. The high CM rejection and low gain error decrease the quantification error effectively, and enhance the performance of ADC. The design meets the requirement of ADC applied to software defined radio (SDR).
A Novel Rogue ONUs Detecting Circuit for Commercially Available TDMA-PON
Authors: Zhang Chun Lei , Zhao Chun He , Hu Ying
Published: June 2013

Rogue ONU is a critical failure in TDMA-PON because of the nature that more than one subscribers share upstream bandwidth. A reliable scheme is proposed to detect continuous long light emitting ONUs. And the judge time can be changed by setting the CLK. Compared with other solutions it is cheap and reliable.
Design and Verification for Data Interface 8051_USB IP Core
Authors: Chen Ya Li , Zheng Li Kun , Li Zhe Ying
Published: June 2013

A series of portable mass storage devices are arising due to the effective support from USB interface for its special features, such as easy to use, a high transfer speed and low price. 8051_USB IP core is to achieve data acquisition and efficient data transfer to PC. The abstract of USB Protocol is introduced firstly. Then the design and verification of 8051_USB IP core are discussed in detail. Modules of 8051_USB protocol controller are designed with Verilog HDL. The design is simulated with Modelsim.
Research on the Performance of MSM Gan Ultraviolet Photoelectric Detector
Authors: Sun Yuan Yuan , Jia Qiu Rui , Song Li Min , Li Zheng , Liu Shi Bo
Published: June 2013

GaN ultraviolet photoelectric detectorhave advantages of high quantum efficiency, work at room temperature, high-temperature resistance, good corrosion resistance, resistance to radiation ability etc. Therefore, research ofGaN ultraviolet photoelectric detectorhas important application value in the spacecraft, fire monitoring, ultraviolet communication and other fields.MSM Schottky type ultraviolet photoelectric detectorhas been prepared by a metal organic chemical vapor phase epitaxial deposition method in growth of high qualityGaN semiconductor filmon the sapphire substrate. Then optical and electrical properties of device have been studied by analyzing its illumination and light response performance.The detector sample has high pressure resistanceand response degree. After annealed treatment, the ultraviolet detector has response peak for 0.19 A/W and response time for 70ns.
A RFID Reader Design and Complication Based on MFRC531 Chip
Authors: Ning Hong , Zheng Xue Feng
Published: June 2013

RFID belongs to the basic input device in the IOT(Internet of Things) applications. The country has attached much importance to the technique and application of IOT, and RFID has been widely used in logistics, warehousing, traffic, cattle raising and some other industries. The thesis employs MFRC531 chip and Atmel 89C518 bit microprocessors to design and realize a RFID card reader which can be characterized by simple circuits, easy to realize and convenient to debug. Thus, it may be referred by IOT technicians.
Design of Data Transmission System Based on FPGA and USB 2.0
Authors: Wu Jun Sheng , Shang Fu Zhou , Sun He , Qin Tian , Li Qing
Published: June 2013

In this paper, a high-speed data transmission system based on FPGA (Field Programmable Gate Array) and USB 2.0 (Universal Serial Bus) technology is designed. Firstly, we introduce the hardware of the data transmission system, which includes data acquisition circuit, transmission circuit and power conversion circuit, etc. Secondly, the corresponding software design including USB firmware program, USB driver and firmware modification are described in detail. Finally, the corresponding experiment has been carried out, which show that the developed system will help to achieve the data transmission system with the characteristics of high-speed, integration and low power consumption, etc.
Study on Strategies for Designing Solar Battery Charger
Authors: Jiang Yu Chuan , Yang Fang Quan , Sun Bao Gang
Published: June 2013

So far, all known charge control algorithm have failed as they commonly falsely detect overcharge at random times in the charging and leave the battery partially charged. In traditional charging environments, the current is controlled to a desired value and the thresholds are calculated for this specific value. The goal of this paper is to propose adequate algorithms that would improve the battery charging. New solutions that address the specific problem for modular solar panels are developed in this paper.
Design of Projection Light Source for Solid Volumetric True-3D Display
Authors: Yang Guang Lei , Jing Chang Long , Yao Hui Hui , Feng Qi Bin
Published: June 2013

The solid volumetric true−3D display requires light source with high brightness, high energy utilization rate and high frequency color field. So high−power red, green and blue LEDs with collimators were used as the projection light source. Firstly, the required quantity of LEDs was determined according to the required output luminance, the efficiency of the projector and the red, green and blue LEDs' parameters. Secondly, with the consideration of the LEDs' dimensions, light−emitting mode and output luminous flux, collimator was designed and simulation model was established. Simulation and practical measurement results both show that light source based on high−power LED meet the requirements of the solid volumetric true−3D display.
Coherent Mid-IR Supercontinuum Generation in Bismuth-Based Glass Photonic Crystal Fibers
Authors: Yao Dang , Wen Jian Guo
Published: June 2013

This paper points out the properties of bismuth-based glass and the related design of photonic crystal fibers with flatted and normal group velocity dispersion profile. Supercontinuum generation in fiber is studied by a split-step Fourier numerical stimulation method. The results are shown for highly coherent mid-IR supercontinuum generation with 1.6 octaves bandwidth when pumping pulse width of 150fs and peak power of 40kW at 2.0μm. Analysis illustrates that supercontinuum generation dynamics are dominated by self-phase modulation and optical wave breaking.
Multi-Block Gray Statistics Local Dimming Algorithm
Authors: Zhang Lei , Lv Guo Qiang , Liu Fen , Zhang Xi Tiao
Published: June 2013

Multi-block gray statistics local dimming algorithm is proposed to automatically control the brightness of the backlight for reducing energy consumption and enhancing the image quality. The large blocks are used to determine the value of backlight matrix and small blocks are to determine the image block brightness. With the use of BMA (Blur-mask approach) to blur the backlight brightness matrix and compensate LCD control signal, local dimming function is realized.The simulation results show that: for pictures, the average backlight power consumption is decreased markedly by 19.9% and the contrast ratio is increased by 53%.
Obstacle Impact on the UV-Light Atmospheric Transmission Characteristics
Authors: Zhang Li Quan
Published: June 2013

In order to further understand the transmission characteristics of UV-light signal, this paper, based on the algorithmic model of Monte Carlo method of UV-light non-line-of-sight transmission, conducts the simulation analysis of the obstacle impact on UV-light signal transmission characteristics in the atmosphere. The results show that due to the presence of obstacle, the blind region of detection appears; this blind region is related to the distance of the obstacle, as well as to transmission elevation angle, receiving elevation angle and obstacle height of obstacle. The obstacle exerts a slight influence on energy intensity, but just its height changes the range of blind region detection. The transmission elevation angle and the receiving elevation angle, in case of the presence or absence of the obstacle, have two energy distribution peaks which change to some extent, and the energy attenuation is more significant in case of the absence of the obstacle.
Mobile Tracking System Based on Event Driven Method
Authors: Abdurohman Maman , Sasongko Arif , Rawung Ricky
Published: June 2013

Monitoring system can be performed both offline and online, and this research carries out the design of long-distance monitoring system for moving system. GPS module is used as system input containing position information of monitored system. This information is processed by the system and is sent by GSM module. On the receiver side, the data are compiled for monitoring system movement. The system is implemented using µC Cortex-M4 by applying Event Driven method. This method is applied for saving resource. The result shows good accuracy level which is measured based on monitoring with system position in the field
A Novel Data Fusion Method Based on Signal's Reliability
Authors: Xiao Ming , Pan Liang , Bu Yan Long , Wan Li Li
Published: June 2013

The traditional Kalman filter is able to obtain the optimal estimation of the estimated signals. However, it fails to consider their reliability. In real applications, the estimated signals may include outliers. Fortunately, we are able to know the reliability of the signals transcendentally. In this paper, we derive the one-dimensional data fusion formulas based on signals reliability which is according to minimum variance restriction. Furthermore, a corresponding data fusion scheme is proposed. Experimental results show the propose data fusion method performs much better than traditional methods.
RFID-Based Thermal Convection Floating Type Accelerometer with Different Packaging Chambers and Filled Gases
Authors: Lin Jium Ming , Lin Cheng Hung
Published: June 2013

This research proposes a wireless RFID-based thermal convection accelerometer, and relates for the technology to manufacture and package it on a flexible substrate. The key technology is to integrate both a thermal convection accelerometer and a wireless RFID antenna on the same substrate, such that the accelerometer is very convenient for fabrication and usage. In this paper the heaters as well as the thermal sensors are made on the surface of the flexible substrate with the traditional floating structure. In addition, the inner shape of the chamber can be as hemi-cylindrical and hemi-spherical ones instead of the conventional rectangular type. Comparisons are also made, the sensitivity of the new proposed semi-spherical design with Xe gas is better at lower accelerations.
Study on Simulation System of Incremental Photoelectric Encoder
Authors: Yang Hai Hui
Published: June 2013

To change the phenomenon of“Being an armchair strategist” in the research on the photoelectric encoder,the simulation system of that had been researched using virtual-reality technology. Thebasic principle of the photoelectric encoder was expounded. The developmentstrategy of the simulation software was introduced. Some key problems and theirsolutions, including drawing of grid line and motion control method, voltagesignal and the pulse signal processing and display and parameter adjustmentmethod, were put forward in development. Finally, a virtual simulation examplewas provided.
Shiplock Multi-Channel Water Level Monitoring and Message Interaction
Authors: Tang Wei , Zhang Peng , Liu Yong , Wang Li Hui , Liu Lin Fei
Published: June 2013

The real-time monitoring of water level is a key element for the security and automation of shiplock. To meet the requirement of real time measurement and information releasing of multipoint water level for a shiplock station, a multi-channel water level monitoring and SMS interaction system based on high-performance MCU W77E58 is designed. Pressure water level sensors are used to acquire multipoint real-time water levels at upstream, downstream, lock chamber points. The water level information is processed by MCU and transmitted to the remote IPC through the RS485 bus. IPC interface is designed basing on VB6.0. It completes the bi-directional interaction of water level information to cell phone users with GSM module by sending short messages. Site operation shows that overall scheme of the system is reasonable, hardware and software works well and running costs is relatively low. The system fully meets the requirements of shiplock and is worth popularizing and application.
SCP: A Simple Communication Protocol for WBASN
Authors: Geng Dao Qu , Fang Zhen
Published: June 2013

In recent years, researchers have increasingly paid more attention to the Wireless Body Area Sensor Network (WBASN) for its potential applications in medical care and health care field. In these applications, the reliable data transmission is the key point. This paper presents a simple protocol for WBASN, and the reliability of data transport is concerned. The protocol design is described in detailed, and then the protocol evaluation is given. The evaluation result shows that the protocol is suitable for the application of WBASN.
Direction Estimation of Water-Entry Point with Single Vector Sensor
Authors: Xiao Di , Zhang Lan Yue
Published: June 2013

The water-entry point was the first information collecting point on detecting an object which was dropped into water from air. Single vector sensor could estimate the direction of the water-entry point with its sound field pressure and particle velocity signals. The complex sound intensity method was applied in vector signal processing. The simulating experiment and the practical experiment on the lake were all based on the estimation deviation of the theory on different SNR. By processing the devided signal in time domain with this theory, the water-entry object could be tracing timely.
Daytime Visibility Measurement with Camera during Spring in Qingdao
Authors: Liu Qian Qian , Zhang Bin
Published: June 2013

Based on digital camera method, there was using an improved dual-target method to measure atmospheric visibility. Using a digital camera to obtain images selected targets under different weather, to brightness contrast method and dual-target method were used to edge detection and Hough transform to obtain the image of the target and background, then respectively through the brightness contrast method and dual target method to calculate visibility value, in view of the different weather will dual target method and brightness contrast method and meteorological bureau issued the visibility value contrast experiment. Comparison results show that the digital camera method for visibility value and weather bureau data released by the trend is almost the same, especially dual target method. Digital camera method proved the effectiveness of Qingdao area visibility observation.
Research on Improving GNSS Level Fitting Accuracy of Multi-Faceted Function
Authors: He Qun , Chen Yong Sheng , Chen Jun Yu , Ma Hong Bin
Published: June 2013

We use various multi-faceted functions to improve fitting accuracy of GNSS level fitting. Propose a method to select kernel function, determine smooth coefficient and a law to choose kernel function node for improving fitting accuracy. We give a formula to calculate smooth coefficient and test it in plain area. The formula has practical significance to improve fitting accuracy and stability of the results.