bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of Non-Pneumatic Tire Technology
Authors: Zhang Zhong Zhi , Lv Jian Gang , Song Bin , Guo Shao Yan , Gao Fei
Published: September 2013

The concept and connotation of the non-pneumatic tires were defined based on safety problems caused by punched and bursted tire. The types of the non-pneumatic tires were classified and the representative products were introduced and the developing trends were predicted. The necessity and feasibility of developing non-pneumatic tires with safety, versatility and efficiency were put forward and discussed.
A Rotation Based Sorting Method for the Feature Points Abstracted from Skew Calibration Image
Authors: Bian Qian , Chen Sui Yang , Liu Yang Chuan
Published: September 2013

During camera calibration, the calibration pattern image is always skew. This brings much difficult to feature points sorting, which affects calibration accuracy. In this study, a rotation based sorting method is proposed. First, detect the skew angle accurately; then, transform the original coordinates to the rotated coordinates and establish the mapping relation; then, sort the rotated coordinates; finally, sort the original coordinates using the mapping relation. To verify the feasibility of this method, an experiment is carried out. The result shows that the rotation based sorting method can sort the feature points accurately at different skew angles. Its accuracy makes this method suitable for high accurate camera calibration.
Analysis and Compensation of Radial Motion Effect on Stepped Frequency Signal
Authors: Zhang Yao Tian , Liu Jia Jia , Zhang Yu Xian , Liu Miao
Published: September 2013

Stepped frequency signal is an important high distance resolution signal, this property is realized by combining several pulse signal, so it is easy to be effected by targets radial motion. Here we analyzed how targets radial motion affects the synthesis HRRP, then a method of velocity measurement is provided, then compensation using the predicted velocity.
Effect of Electrode Size on Signal Attenuation in Intra-Body Communication
Authors: Qin Yu Ping
Published: September 2013

In the galvanic coupling intra-body communication, transmitting and receiving of signals require coupling between electrodes and human tissue. Electrode size has a direct effect upon signal attenuation so as to influence signal transmission. To analyze the exact effect of electrode size on signal attenuation, the volume conductor model of human forearm is built with COMSOL Multiphysics 4.2a.It can be found from the simulation experiment that, signal attenuation declines with the increase of electrode size, which lays the foundation for subsequent experiments.
The Identification of EEG Feature Evoked by Imaginary Movement
Authors: Qiao Xiao Yan , Wang Chun Hui
Published: September 2013

Aiming to the ERD/ERS phenomenon of left-right hand imaginary movement, this paper presents a method of wavelet transform combined with statistical analysis to extract EEG features evoked by imaginary movement. And the features were classified using the support vector machine based on RBF kernel and cross-validation accuracy (CVA) method. The results have shown that this method can perform effectively to extract features and reflect ERS and ERD characteristics of EEG signal. The accuracy of classification can reach 90% within the time costing 3.5 seconds. The highest signal to noise ratio is 1.445, and the maximum mutual information is 0.645bit. The results can meet the real-time brain-computer interface system.
Study on Influence of Excavation of Metro Station on a Steel Box Girder Bridge
Authors: Yang Lei , Zheng Kai Feng , Zhu Jin
Published: September 2013

To evaluate the safety of a steel box bridge during the construction of a metro station, the process of excavation which was based on the metro station and its overpass bridge in Chengdu was analyzed. A detailed FE model was established which include the soil, the station and the bridge using general finite element software ALGOR. According to the procedure of the constructing station and completed station, investigating the absolute settlements and differential settlements of the earths surface and foundation in metro station incidence, the effect on the steel box girder overall stress and local stress was analyzed extensively. The results demonstrated that the excavation has a insignificant influence on the deformations and stresses of the steel girder. Thus it provides an important understanding of the interactions of bridge structures and underground constructions.
Application Research on Real-Time Database System Model Based on Distributed System of Cloud Manufacturing
Authors: Li Jian Ping
Published: September 2013

This paper analyzed on real-time database system, and applied the cloud manufacturing technology and distributed system technology to the database system model. Through the analysis on the real time database, we can got the distributed real-time data system types and data storage model, establish two kinds of memory T-mode and S-mode, database storage model and make the production of block. Finally establish the work flow of distributed real-time database system, get relevant application program. A large number of real-time data collection and administration can be realized, which can improve the real-time information data processing efficiency and system model performance. Through the establishment of model and analysis of its working process in the real-time distributed system real time database application path, it can provide guidance for the establishment of distributed real-time database system model.
Design and Implementation of Book Information Corpus Collection Tool Based on Web
Authors: Liu Wen Zhao , Niu Li Min , Chen Jun Jie
Published: September 2013

Under the aims at corpus automatic collection on the process of the large-scale Lexicography corpus collection, the paper described corpus collection Technology which is based on Web. And then, the paper introduces the book information corpus tool, including how to make use of the technique of search engine and information extraction in our system.
Application of Embedded Linux Interprocess Communication Technology in the Seismic Exploration
Authors: Tian Liang , Zhang Qi Sheng , Zhang Qi Mao
Published: September 2013

Oil and gas resource as the most important part of energysource compositionits in China, its seismic exploration and development has great significance. And this requires development of new generation of high-precision digital telemetry seismograph. Shared memory, the common telecommunication mode between Linux processes becomes the preferred interaction means between applications of seismic exploration for its controlled capacity and speedy interaction rate. This article describes the stacked power station being constructed by the embedded microprocessor PPC405 and FPGA chip, as well as the transplantation of U-boot, Kernel and file system, the development of inter-process communication application on basis of shared memory, and finally the network interaction of telemetering digital seismic power station.
Design and Implementation of the File Management System Based on the Struts + Spring + Hibernate Multilayer Framework
Authors: Cui Shu Min
Published: September 2013

This paper adopts a multi-tier architecture based on the Java platform and establishes a system development architecture with a high scalability by using the SSH technology, which is short for Struts, Spring, Hibernate technology. It designs and implements the file management system based on SSH. This paper also focuses on the explanation of the system architecture and the system function module and proposes specific implementation technology and implementation method.
A Nonlinear Ternary Circle-Preserving Interpolatory Subdivision Scheme
Authors: Song Qian , Zheng Hong Chan , Peng Guo Hua
Published: September 2013

In this paper, we present a new nonlinear ternary interpolatory subdivision scheme which has the properties of convexity-preserving, circle-preserving and the limit curve iscontinuous. In each subdivision step, the newly generating points will be on the circle determined by the interpolatory point and its adjacent points. Numerical examples show that this algorithm is simple and curves generated by this subdivision scheme are fair curves.
A Distributed Broadcast Algorithm Based on Master/Slave Dominators for Wireless Mesh Networks
Authors: Zhang Lei , Wang Xue Hui
Published: September 2013

We proposed a distributed broadcast algorithm which is based on master/slave dominator partition, it not only guarantees the full coverage of the network, but also has better scalability. In our algorithm, each node first selects its connected domination set (CDS) from its two hop neighbor graph, then partitions the domination nodes into master and slave dominators, master dominators forward the broadcast packet, slave dominators monitor the network coverage and forward the broadcast packet when necessary.
A Shared Path Protection Mechanism Based on Delay Constraint in the Optical Network
Authors: Li Jie , Wang Xing Wei , Huang Min
Published: September 2013

Survivability is an important concern in the optical network. In order to offer an effective and efficient protection mechanism that meeting both delay constraint and availability guarantees for real-time services in the optical network, a shared path protection mechanism based on delay constraint is proposed in this paper. Thinking of the processing delay and the propagation delay as main factors which have great effect on the delay of real-time services, the mechanism designs the routing and wavelength assignment schemes for the working path and the protection path. Simulation results show that the proposed mechanism is both feasible and effective.
The Design of XCON Conference Presence Extension to Support Voting
Authors: Yang Ning , Li Man Po , Xiang Yong , Guan Yun Chong , Zhang Wei
Published: September 2013

As one of the tightly coupled conference frameworks, XCON can support a wealth of conference services. However, the conference Presence service of XCON is not mature, and it can only support one-way notification service, lack of interactivity. So a new type of conference application service called Conference Presence Voting is proposed in this paper to increase the interactivity within conference Presence services. Conference Presence Voting is realized by adding a subelement which is used to describe the conference voting in the conference Presence documents, while SIP and its extension are used to design the conference voting mechanism. In this paper the design principle and concrete implementation details are presented and analyzed in detail. This mechanism has resolved the problems of standardization in conference voting, and added the interactivity of conference Presence services.
The Design of Digital Campus Unified Identity Authentication System Based on Web Services
Authors: Li Xin Hua
Published: September 2013

Web services technology is loosely-coupled, language-neutral, platform-independent and open. Thus web services are suitable for cross-platform and cross-application integration. Study the web services integration, the data integration and the unified identity authentication with emphasis, and present a scenario of actualizing the integration platform. The platform provide a convenient and efficient unified entrance to assess the university information services. The user can effectively integrate the campus information resources by the application of this platform.
Semi-Supervised Classification and its Application to Filtering IDS False Positives
Authors: Mei Hai Bin , Zhang Ming Hua
Published: September 2013

Alert classifiers built with the supervised classification technique require large amounts of labeled training alerts. Preparing for such training data is very difficult and expensive. Thus accuracy and feasibility of current classifiers are greatly restricted. This paper employs semi-supervised learning to build alert classification model to reduce the number of needed labeled training alerts. Alert context properties are also introduced to improve the classification performance. Experiments have demonstrated the accuracy and feasibility of our approach.
Wireless Broadcasting Retransmission Strategy of most Lost Packets Priority Based on Network Coding
Authors: Cai Shao Bin , Zhao Ping , Yao Nian Min , Gao Zhen Guo
Published: September 2013

Combining network coding, a wireless broadcasting retransmission strategyMost Lost Packets Priority is proposed to decrease the number of retransmissions, preferentially consider nodes which have most lost packets, choose the suitable packets to be encoded and retransmission in order to reduce the number of retransmissions, increase network efficiency in wireless network. It is showed in experiment that compared with BENEFIT, MLPP can reduce the average number of retransmissions, and make the average number of retransmissions closer to the preferential number of retransmission and improve the transmission efficiency.
Optical Distribution Network Partitioning Method Based on Tabu Search
Authors: Gao Xia , Gao Ya
Published: September 2013

Since the 1970s, with the in-depth study of graph partitioning, we have found that, graph partitioning, both in the fields of academic researches and engineering applications, has its own important applications, such as the layout of the fiber-optic network in telecommunication network. Therefore, the graph partitioning problem has been widespread concerning and largely studied by the scholars at home and abroad. Tabu search, as one of the modern optimization algorithm, has been playing an invaluable effect in many fields. And by now, both graph partitioning and tabu search have been developed to a certain extent, but few people consider the integration of the two problems, coordinate optimization, so as to achieve better results. Therefore, this paper proposes a graph partitioning method based on coordination and optimization of constructive graph partitioning algorithm and tabu search algorithm and obtains a graph partitioning algorithms of good efficiency and quality. In the experimental part of the paper, optical distribution network partitioning problem is transformed into a graph partitioning model. Experimental results show that the efficiency and quality of the partitioning method are acceptable in optical distribution network division.
PKI Trust Model Analysis and Research
Authors: Yuan Lian Hai , Liu Hua Chun
Published: September 2013

The basic idea of trust model is to define and expect the entity trustiness according to the history behavior of an entity; it was firstly proposed to solve the question of the trust evaluation in distributed system. And the trustiness is an important reference for choosing an object entity to cooperate. The choice of trust model process in the implementation of public key infrastructure is a key starting step. Paper firstly introduces the concept of trust and trust model, and then the situation of the study was introduced. Finally we compared typically trust model.
Study on the Law of Wheel Wear Based on Copula
Authors: Jiang Ya Nan , Zhang Wei Hua , Song Dong Li
Published: September 2013

The law of wheel wear is the basis for making turning repair cycle, and is one of the most important guarantees for the safe and stable running of train. A statistical analysis of individual wheel wear parameter was carried out based on wheel profile data of CRH2. The change law of individual wear parameter with mileage showed that wear process of wheel could be divided into two periods: the run-in period and the stable wear period. The paper has realized to research on the correlation between nominal wheel diameter abrasion value and wheel flange thickness variation based on Copula, too. Frank Copula was selected to describe correlation of the two wear parameters, the correlation index (α) of Frank Copula was estimated and the joint distribution function considering dependence was given. The value of α indicated that there was a weak positive correlation between the two wears, which can be ignored for calculating the accumulative failure rate of wheel wear. So the two wear parameters can be regarded as independent random variables during failure analysis of wheel wear.
Based on DNA OTP Key Generation and Management Research
Authors: Zhang Yun Peng , Tian Feng Ying , Sun Man Hui , Yu Ding , Fan Fei Xiang , Liu Wei Guo
Published: September 2013

With the development of molecular-bio technology, the feature of DNA molecules for ultra-large-scale data storage has created a new approach for data storage. This paper gives a way of strengthening key transport security. Through recombinant DNA technology, use only sender-receiver know restriction enzymes to combine the key DNA and the T vector, to form a recombinant plasmid, making the key DNA bio-hide, and then place the recombinant plasmid in implanted bacteria .
Real-Time Video Transport System Based on MPC860T
Authors: Dong Xue Feng
Published: September 2013

In the paper, a design and implementation of real-time video transport system based on MPC860T is introduced. The key technologies and system implementation steps are discussed from the hardware architecture and software design, focusing on the process of the hardware design and software platform composition. Finally, the operation process analysis of system platform is given. The test results show that the system can achieve better real-time performance and reliability.
Forecasting Web Application Software Aging Damage Based on User Behavior
Authors: Guo Jun , Zhang Guang Xuan , Liu Fang , Zhang Bin
Published: September 2013

Software aging threatens to the reliability of the software and computer system seriously, and has become the main bottleneck restricting the development of software reliability. As most of user behavior has certain regularity, so it can be forecast. This paper proposed a prediction method based on the Frequent-User-Access-Patterns-Tree-With-Time-And-Aging (FUAP-Tree). And this method compressed the user behavior into a FUAP-Tree to store the Web log, and then predicted the user behavior using pattern matching by traversing the sub-trees of the FUAP-Tree. The load of the Web application software could be obtained when user behavior is known. So we could predict the Web application software aging. The conclusion we got by the experiment of comparing with another method is that this method got a more effective and accurate result.
Study and Optimization of T-Tree Index in Main Memory Database
Authors: Sun Feng Dong , Guo Quan , Wang Lan
Published: September 2013

The bottleneck is not the disk I/O but CUP clock speed faster than the memory speed in main memory database .In order to achieve high performance in main memory database ,it is a good approach to design new index structures to improve the memory access speed .This chapter presents a T-tree index structure and its algorithms in main memory database firstly .Then presents two results on Optimization of T-tree index ,including T-tail tree and TTB-tree. Our results indicate that the T-Tree provides good overall performance in main memory.
Exploration of Modulation and Demodulation for Body Area Networks
Authors: Li Guo Quan , Tang Ke , Lin Jin Zhao , Pang Yu , Li Zhang Yong , Zhou Qian Neng , Deng Lu
Published: September 2013

Modulation and demodulation are two important parts in BAN baseband transmission systems. Different demodulation algorithms may affect the BER performance of the entire system seriously. Referring to IEEE 802.15.6 BAN standard, theoretical analysis and algorithm design of the modulation and demodulation for π/2-DBPSK and π/4-DQPSK is carried out and simulation results of BER performance are presented in this paper. In AWGN channel, both modulations achieve good performance, and performance degradation of π/4-DQPSK happens in multipath channel which may not satisfy the requirements. Adaptive modulation is considered to solve this problem by choosing different modulation scheme according to channel quality.
Improvement on Property Resolution of Reduction Arithmetic and Application
Authors: Zhang Qiu Na , Li Li Hong , Qu Bo Chao
Published: September 2013

This paper is based on my master's degree thesis, here we use the optimal algorithm for attribute reduction -- improvement on Property resolution of Reduction Arithmetic, this algorithm is applying to complete and incomplete information system.
Improvement of Calculation of Granulation Reduction and Application
Authors: Zhang Qiu Na , Yang Ai Min , Ji Na , Zhao Wen Jing
Published: September 2013

This paper presents a new reduction algorithm of granularity - reduction algorithm of granularity of Property resolution. This result has certain theoretical significance and application value in establish the granularity in the information system and attribute reduction. And it gives its application of whether suffering diabetes.
Study on Group Decision Support System for Production Resource Allocation of Engineering Machinery
Authors: Xu Xuan Hua , Xia Yue , Wang Qiu Feng , Zhao Hai Ming
Published: September 2013

Aiming at making the decision about production resource allocation of engineering machinery through the coordination of enterprises, firstly the collaborative group decision-making method of production resource allocation is proposed based on an information entropy model. On the basis of that, a new structure of group decision support system is constructed by Web Services technology. Finally the decision-making system of engineering machinery industry of Hunan province is taken as an example to verify and apply.
Research on Deep Packet Inspection Based on Cloud Computing
Authors: Xia Hui
Published: September 2013

Traditional appllications of deep packet inspection technology in the cloud is unscientific and unreasonable.In this paper,an intelligent cloud-cooperation framework of DPI is designed, given characteristics of cloud computing like distributed computing and user configurability. The overall efficiency is improved since it coordinates the configuration intelligently according to diversity of resources in the back end of cloud computing system and provides a scheduler for cooperative processing and defenses of repeated assaults. By comparing our design with traditional framework in virtual cloud computing platform, we prove the advantages of cloud-cooperation framework on space and time performance.
A MAC Protocol for Terahertz Ultra-High Data-Rate Wireless Networks
Authors: Ren Zhi , Cao Ya Nan , Peng Shuang , Lei Hong Jiang
Published: September 2013

The terahertz wave is a kind of electromagnetic waves which locates between millimeter waves and infrared lightwaves, and the frequency range is 0.14THz~10THz. Terahertz is used as a carrier wave to communicate with each other because it has large bandwidth which can support Gbps wireless data rates. Therefore, terahertz communication technologies become research hot spots in recent years. However, its still rare in MAC protocol of terahertz ultra-high data-rate wireless networks at present. In order to realize wireless access of ultra-high data-rate under the condition of terahertz carrier frequency, a novel MAC protocol is proposed in this paper. The improved MAC protocol which makes the maximum data rates reach up to 10Gbps or higher is designed by new MAC control mechanisms, new time-slots allocation schemes and new superframe structure. Theoretical analysis and simulation results show that the new proposed MAC protocol of terahertz ultra-high data-rate wireless networks can operation normally, and the maximum data rate can reach up to 19.2Gbps. This maximum data rate is 2 times higher than 5.78 Gbps which IEEE 802.15.3c can achieve.
Design and Implementation of the .NET-Based Online Learning System
Authors: Li Xiu Ying
Published: September 2013

Using the internet to provide learning exchange services for students has become a need now. This paper introduces the frame structure and the main functions of each module of the campus online learning system with a three-layered B/S structure based on .NET and Microsoft SQL Server 2000, and lays stress on implementing the course management and courseware management of the system.
The Distributions and Moments of the First Entrance Time for Nonhomogeneous Semi-Markov Process
Authors: Chen Liu Xin , Yu Tong
Published: September 2013

In this paper we discuss one kind of nonhomogeneous (H,Q) processes, Nonhomogeneous Semi-Markov Process. We get the distributions and moments of the first entrance time for this process. And furthermore, we obtain their recursive formula.
Combined Improved EEMD with SVM in the Bearing Low Dimensional Small Sample Fault Diagnosis
Authors: Zhang Mei Jun , Chai Kai , Huang Jie , Chen Hao
Published: September 2013

In order to diagnose bearing fault with less samples,combined improved EEMD with SVM in the bearing fault intelligent diagnosis under low dimensional small sample is researched in this paper.It is applied to the binary classification and identification in bearing normal and fault state.The results show that depend only on less sample data 5d feature vector classification after training, SVM using linear kernel function and polynomial kernel function classification accuracy is still up to 100. classification accuracy under the less sample data in less 5d characteristic vectors by RBF kernel function under Sigmoid kernel function is relatively low.Choose appropriate SVM kernel function completely can realize low dimensional small sample right binary classification.
Applications of Simulation and Demo in High Frequency Electronic Circuit
Authors: Tan Qi Yao
Published: September 2013

This paper was based on the rich theoretical foundation and practical teaching experience, and focused on current teaching situation of high frequency electronic circuit and the cognition of simulation and demo, then it had the positive analysis on the superiority of simulation and demo in high frequency electronic circuit, and it also got the teaching case analysis on simulation and demo of parallel resonant circuit in the high frequency electronic circuit. Through establishment and verification of teaching effect model of high frequency electronic circuit, it can obtain that the teaching presents the advantage of positive feedback through the simulation and demo, and it also can provide new theoretical basis and path of exploration for the teaching research in this field.
Electromagnetic Compatibility Design of RFID Chip
Authors: Dang An Ming
Published: September 2013

RFID chip has been more and more widely applied in all walks of life, which makes enormous contribution for the economical use of the social resource, however the RFID chip of electromagnetic compatibility problem always restricts the development of this technology. From the RFID chip's concept, operation principle and the structure analysis, at the same time RFID chip electromagnetic compatibility design is confronted with problems, measurement methods and other aspects, to carry out research and analysis, so as to establish a set of practical and standard chip design system.
Research on Remote Monitoring and Control System Based on Communication Technology by Power Line Carrier
Authors: Hou Yi Feng
Published: September 2013

The communication by power line carrier has been became the mainstream of the communication technology. With the development of science and technology, this technology is no longer limited to communications. Remote control system research based on the technology has been developed into a very hot topic at present. But the remote monitoring system design are not identical, and it caused many remote monitoring system appear to the compatibility problem. The paper firstly established the model of the power line carrier communication technology, and then on the basis of this model, completed remote monitoring system design research. This paper mainly took the current very hot intelligent household as a case study, and then spread the monitoring system according to the practical, and it have a description of the design about remote control system of power line carrier communication technology. The paper makes important theoretical basis for the other USES of remote monitoring system design based on this technology.
Design of the PLC On-Line Optimization Pi Controller Parameters Based on Fuzzy Algorithm
Authors: Zhu Gang
Published: September 2013

With the development of science and technology, the controller is widely used in various fields, and control performance is also more and more accurate. In recent years, PID technology is thorough research discuss in many fields, and PID are still not thoroughly solved in online and offline optimization problems. Based on this, this paper introduces the PI controller from the two aspect of the parameter design and online optimization, and the introduction of a new method-fuzzy algorithm, to solve the on-line optimization problem of PI controller parameters in the process of PLC designing, and the program is brought into MATLAB software simulation, to prove the correctness of the program. Finally, this paper presents PI controller with some deficiencies, and provides theory reference for the PI controller parameters optimization.
Online Capturing and Identification System of the Egg Image before Hatching
Authors: Yang Jian , Xia Chun Yan , Peng Zhan Wu , Li Xiu Ying
Published: September 2013

In order to improve egg hatchability with non-destructive identification of fertilized eggs, a system that captures egg image online and extracts image feature parameters is designed. It takes an TMS320DM642 processing chip as the core and sets up a fuzzy neural network which is based on 5-D input and 1-D output to identify the egg fertilization. The test result indicated that this model has a high speed and accuracy, easy to realize with 97.22% accuracy as matching the requirement of actual test.
Wireless Temperature and Humidity Monitoring System Based on ZigBee
Authors: Wang Xin , Pan He , Yang Jian , Liu Zhi Gang
Published: September 2013

Along with the automation development trend of the agriculture, effective method of temperature and humidity information monitoring system is more and more important. Large scale pattern is the obvious characteristic of modern agriculture. Traditional cable monitoring method is not enough in some points such as maintenance difficulties, complex wiring and power consumption high. Now more and more people resort to wireless methods, we designed a new monitoring system based on ZigBee with CC2530 as the core chip, which consists of three parts: upper computer and a coordinator node and three terminal sensor nodes. This paper described the design of hardware and software process in detail. The method in this paper has proved by the experiment, it has good expansibility, low power consumption and stable performance.
Design of High Precision Earth-Temperature Detection System
Authors: Li Yan , Sun Xiao Hua , Wang Fu Shun
Published: September 2013

Based on platinum resistance as temperature medium, according to the measurement precision requirements during geothermal testing process, optimize the circuit design and segmented curve fitting were used, discussed the feasibility of realize high precision temperature detection. Combined with high precision temperature measurement circuit, through the single chip microcomputer control, segmented curve fitting the temperature sampling value, get the corresponding D-t curve, and compensate the nonlinear relationship of platinum resistance in the practical work, to achieve the purpose of accurate measurement of the temperature.
Orthogonal Optimization Algorithm of Electronic Circuit Parameters
Authors: Li Yong Xian , Lin Yu Zi , Li Jia Zhong
Published: September 2013

A novel intelligent algorithm of orthogonal optimization is introduced for electronic circuit parameters. The orthogonal optimization design develops from conventional orthogonal design. According to the results of variance and variance ratio analysis in the orthogonal design, the next searching direction and range of each variable are determined, which is able to be circulating in the optimization of searching. The orthogonal optimization solution is performed intelligently until error value of the variance ratio for each variable is approximately equal. Since the tolerance of an optimal solution is obtained when the parameter design is completed, this method does not need special tolerance design. The authors take a stabilized power supply circuit as an example to optimize the circuit parameters. This method has less calculation amount, shorter searching time, more rapid speed and higher accuracy of optimization searching. Optimization results show that this algorithm is much better than other current algorithms of intelligent optimization methods.
Design of an IDC Power Three-Phase Equilibrium Distribution Soft-Switching System
Authors: Hong Yan , Hui Cai , Chen Wei Min , Qing Li
Published: September 2013

To decrease the cost brought by the electric energy waste, a three-phase equilibrium distribution soft-switching system is proposed. The system guarantees three-phase equilibrium. Firstly, the inverter tracks the original access phase to be synchronous, then switch the electric equipment to the inverter. Secondly, the inverter tracks the alternative access phase to be synchronous, then switch the electric equipment to the alternative access phase to accomplish the soft-switching. Experiment is used to carry out verification for this system. The result shows that there is no impulse current when the electric equipment switches. The system achieves soft-switching.
Dynamics Analysis of the Spatial Catapult Separation Problem
Authors: Wang Zhi Gang , Yang Ya Nan , Deng Yi Fan
Published: September 2013

This paper analyzed the spatial catapult dynamics of spatial catapult on-orbit separation problem equipped with a separate rail, providing the basis for separation of ground testing and separation system design. under the premise of separation requirements as well as the arbitrariness of locations of the spring and rail, By using newtonian dynamics, as well as momentum theorem and angular momentum theorem, the dynamic model of the separating motion was formulated in translational inertial reference frame .Solution examples with different initial conditions were offered ,and the accuracy of the model is verified via the solution of numerical simulation.
A Fast Acquisition Scheme for Coherent DDS/FFH System
Authors: Liu Ce Lun , Han Long Bo , Su Xu , Wen Xiao Jie
Published: September 2013

For a coherent DDS/FFH system (deeply direct sequence and coherent fast frequency hopping hybrid spread spectrum system), signal has a very large spread spectrum ratio. Signal acquisition process becomes very complex and difficult due to interference and doppler frequency shift in a strong interfering and high dynamical environment. FFT corelation sequence points are very large if traditional frequency-based FFT acquisition scheme is used, FFH requires FFT operation should be completed in a much shorter time (within one hopping duration time), which makes system realization become very complex or even impossible. A partial matched filter combining FFT, coherent accumulation combining incoherent accumulation acquisition scheme is investigated, system realization complexity is reduced.
The Research of the New Digital Equivalent Inductor
Authors: Zhen Huang , Shang Qing Hua , Cao Wen Jie
Published: September 2013

To meet the requirements of scientific research personnel on wide range and high-precision variable inductor. The new digital inductor is based on the impedance converting circuit. The new active impedance converting circuit is formed by integration operational amplifiers, a small amount of resistance and capacitance. Through control of the switching circuit part line, thus producing the equivalent pure inductance. Experimental results show that using digital potentiometer and analog switches adjust circuit resistance to adjust the inductance value. So that digital equivalent inductance has certain advantages in the circuit experiment debugging and inductance adjustable electronic products.
Prediction and Analysis of the Driving Range of Electric Bus
Authors: Zhao Kan , Zhu Cong , Xia Hong Wen , Zeng Cheng
Published: September 2013

In this paper, a method used to predict the driving range of electric bus based on electrochemical model of lithium ion battery was presented. Using a electric bus powered by lithium ion battery as an example, the driving ranges under three different driving cycles including American UDDS, European EUDC and Japanese 1015 were respectively predicted by the proposed method, and the effects of the temperature of battery pack and the number of battery module on the lowest state of charge SOCL required by the bus to travel a given distance were also analyzed.
Design of Temperature Testing System Based on Zigbee
Authors: Ma Hai Bo , Pan Jun , Xu Ai De
Published: September 2013

A temperature testing system based on zigbee is designed in this paper. The whole system uses CC2430 RFIC as the core component. The hardware structure and software process of temperature testing terminal and coordinator are proposed. The test indicates that this system has fine performance and strong application value.
Cable Fault Recognition Based on the Wavelet Energy Spectrum of Mode Components
Authors: Wang Mei , Wu Jing
Published: September 2013

When a fault appeared in a power cable transmission line, the transient current with high frequencies would be produced in the system. Three independent mode components could be obtained by applying the phase mode transformation to the transient current. For different types of the faults, the three independent mode components have different features. Based on wavelet energy spectrum of mode components, a method for cable fault recognition is developed in this paper. First, the fault current is decomposed by using Karenbaue transformation matrix. Then, wavelet transformation is uses to obtain the coefficients of the high frequency components which reflect the original signal high frequency energy. Finally, based on the wavelet energy spectrum method and the detailed coefficient manipulation, the equivalent norms of the mode components are obtained. Compared with the traditional fault recognition method, the new method depends less on zero mode component in two-phase short to ground state, and it can recognize the fault class in the cases of different fault positions, different fault path resistances and different inception angles.
Design of W-Band Extended Interaction Output Cavity
Authors: Zhong Yong , Wang Yong
Published: September 2013

In this paper, a novel extended interaction klystron output cavity is presented. With the help of a three-dimensional (3D) particle-in-cell (PIC) simulation, design and optimization geometry of the cavity is performed, which is composed of ladder loaded rectangular waveguide. In present work, the output continue wave (CW) power 724W is achieved, the efficiency and bandwidth reaches 7.5% and 1300MHz, which is operating at beam voltage and beam current is 16 kV and 0.6A , respectively.
Intrusion Detection System Using Grey Theory Combined with Neural Network
Authors: Sun Liang
Published: September 2013

In past few years, with the rapid expansion of computer networks, security has become an important issue for modern computer systems. Intrusion detection technology is an effective way to detect illegitimate use to ensure network security. In this paper, we proposes an intrusion detection system based on a feedforward neural network-aided grey model (FNNAGPM), by integrating a first-order single variable grey model (GM(1,1)) and a feedforward neural network. There are three phases in the system process, including initialization phase, GM(1,1) prediction phase and FNNAGPM prediction phase.
The Design of Positioning Terminal Based on NEO-5Q
Authors: Kuang Xing Hong , Wang Zhi Yu , Huo Hai Bo , Wang Shi Ming
Published: September 2013

This paper introduces a design of liquid crystal GPS positioning terminal based on microcontroller, the system consists of a GPS module, 12864 liquid crystal display module, MCU minimum system module, power module. The paper mainly puts forward the scheme and software design idea, hardware design and debug, the extraction system can realize the positioning and navigation information parameters of GPS global positioning system and the information parameters is analyzed.
High Precision Calibration of Binocular Vision System Based on Genetic Algorithm
Authors: Zhou Jun , Zou Li Jun , He Jun Chao , He Xiao Pan
Published: September 2013

This paper presents a high precision calibration method based on genetic algorithm (GA) for binocular vision system, involving the problems of the GA optimization and the camera modeling. For the GA optimization, both the binary-code and the real-code are considered. The binary-code makes the feasible solution approach to the optimal solution rapidly, and then the accuracy of GA is further improved by using the real-code. Furthermore, in order to improve the convergence rate of the algorithm, the parameters of the two cameras are calculated separately, and the target function is selected by the forward mapping relationship between the world coordinates and the image coordinates. The experimental results demonstrate the effectiveness of the proposed approach.
Structural Optimization Design on the Sunflower Shaped Arch Bridge
Authors: Wang Wen Qing
Published: September 2013

Based on the principle of orthogonal test, the optimization model of sunflower shaped arch bridge scheme was set up. The five key design parameters were selected as the main factors. The four computation index, which reflect mechanical performance, were selected as analytical objects. The 16 orthogonal experiment schemes were arranged with four levels orthogonal table . The curves of the factors to the index were obtained from the mechanical response under dead load and live load through the finite element analysis model. By the range analysis method, the influential levels of the factors to the index were obtained from the result of the test , and the factor optimizatuion level of the factors was determined to further optimize the layout scheme of the sunfloawer shaped arch bridge.
Analysis of Fuse Installed Interference Problem
Authors: Su Hui , Yang Kun
Published: September 2013

fuse trip interlock line fixed plate and front plate reinforcing ribs interference problems often occur in assembly, analyzed the data by field measurement,, establish project objectives, quantitative targets, through causal analysis, cause analysis, find the reason, the main reason to find the improvement scheme, and finally establish control plan, monitor the production situation, in order to control the situation in production. According to the investigation on the interference problem of fuse trip interlock line in installation, detailed analysis of the process, the question gives effective solutions, and dynamic quality assurance measures, provided the reference method for solving this kind of problems.
Design of Laptop Power Adapter Circuit
Authors: Wang Shu Hai , Chen Shu Wang , Su Yue
Published: September 2013

In the design of laptop power adapter, the former stage is the power factor correction PFC converter; the after stage is DC/DC converter. The control part controls chip through an integrated PFC and PFM control integrated. In this two structures, the former stage PFC often using traditional inductor current critical conduction mode Boost converter to achieve sinusoidal input current to the whole form, thus reducing input current harmonics with a high power factor, keep a long time , simple structure and low cost.
Research and Realization of Remote Monitoring System for Central Heating
Authors: Lou Guo Huan , Yin Yang
Published: September 2013

In view of the central heating problems for remote, a realization scheme of remote monitoring system for central heating is presented. In this paper, the composition and functions of the heat supply network monitoring center, the heating station monitoring and control system and the wireless communication system are introduced, the control system hardware configuration is discussed. The system has already been used and run in a good effect.
Acoustical Methods Used in the Study of Concrete Durability
Authors: Jebelean Eugen , Badea Catalin , Iures Liana , Jiva Cornel , Borza Ioan
Published: September 2013

The paper presents the experimental research on concretes and in-situ research on existing reinforced concretes elements, using “Pulse Velocity Method”. The “Pulse Velocity Method” it is an acoustical method which uses the ultra-sounds with 20 to 200 kHz frequency. The in-situ acoustic results are used to establish the durability of the concrete in the tested elements.
Considerations on Kinematics and Dynamics of Gravitational Separators with Non-Balanced Eccentric Masses Used for Cereal Seeds Cleaning
Authors: Bracacescu Carmen , Pirna Ion , Popescu Simion
Published: September 2013

The primary processing represents an important link of the process of capitalization of vegetal-origin products and, at the same time, an essential operation of the conditioning chain. Taking into account all considerations, the experts׳ attention has been drawn by the study of phenomena which influence upon the impurities separation process, aiming at a maximum reduction impurities. The paper presents the constructive-functional scheme of an gravitational separator SP-0 0 design, manufactured and testing at INMA Bucharest and the movement Eq. of gravitational separator centrifugally driven by means of non-balanced eccentric masses and also the constructive scheme of electric motovibrator, in view of its utilisation with best results for the drive of vibrating sieves of technical equipments used for impurities separation out of cereal seeds.
Impact of a Kinematic Link with MATLAB and SolidWorks
Authors: Ragan Joseph , Marghitu Dan B.
Published: September 2013

The elastic impact of a free kinematic link with a surface is studied using MATLAB and SolidWorks. The differential equations of motion are developed using an elastic nonlinear contact force and a frictional force. The nonlinear equations of motion are written in an external m-file and are solved using numerical techniques. The results are checked using a simulation in SolidWorks. For the SolidWorks simulation a specific force is defined for the the elastic impact. The numerical results are obtained with the two methods are compared. The vertical elastic displacement during impact has lower values less for the frictional case.
An Analysis of Forced Vibrations to Railway Vehicles
Authors: Ghita Eugen , Bucur Lavinia
Published: September 2013

The forced vibrations of railway vehicles are caused by excitations that appear during the rolling process , especially by the wheel-rail contact forces, which have a random distribution . Another example is represented by the internal forces that appear not only because of the force equipments inside the system or vehicle, which are not fully balanced for centrifugal forces, but also because of the gear boxes. The running stability of the rail-car is analyzed based on the proposed mechanical model and the general Lagrange equation. The amplitude amplification factor and the delay of oscillations are firstly analyzed theoretically, then graphically plotted in function of the non-dimensional normal pulsation for different values of the relative damping factor, both of the rail car suspension and the railroad. The possibility of improving the buffers for both coaches and trucks is analyzed in function of the non-dimensional normal pulsation for different transits of the rail cars through the resonance zone.It leads to several important practical conclusions for the rail car designers and manufacturers.