bluuebunny/crossref_metadata_2025 huggingface dataset:
A Method of Utilizing Semantic File to Realize CAD and FEA Information Integration
Authors: Ma Qin Yi , Wang Ming Wei , Zhou Mao Jun , Wang Hui Hui
Published: September 2013

The interoperation of various applications will need a representation that goes beyond the traditional geometry-based one, which is inadequate for capturing semantic information. The semantic file is proposed to support a tighter integration of CAD and FEA. The main idea of the approach is presented and key technologies are elaborated, including the creation of the FEA solution template, and the matching algorithm between semantic markup file and FEA template file t. Finally, the feasibility and effectiveness of the approach is empirically validated by a case study.
Design of the B/S Model-Based Automated Course Scheduling System of Universities
Authors: Du Dong Ju , Shao Hai Long
Published: September 2013

In order to lift the restrictions of classrooms, teachers, classes and time on the course scheduling, the B/S network architecture and ASP.NET technology are taken as the development tools to introduce the design of the course scheduling system from the perspectives of course scheduling algorithm analysis, overall design and each function module for the purpose of implementing the intelligentized and humanized course scheduling process and perfecting the teaching management work.
Optimal Placement Strategy of DHT-Based Systems to Minimize Lookup Latency
Authors: Zhang Tai , Wang Sheng , Liao Dan
Published: September 2013

This paper proposes an optimal placement strategy of physical nodes of DHT-based systems to minimize the lookup latency and improve the throughput of system. The main idea of our approach is to create a new hierarchy named link space between logical space and physical space of DHT overlay. We firstly give an assignment of link space and then present the optimal placement strategy of placing physical nodes on it based on the given lookup traffic matrix. At last, we use genetic algorithm to solve the optimization problem.
Design and Implementation of Online Photos Collection of B/S Based Registration Systems
Authors: Peng Na Xin , Chen Yu Qiang
Published: September 2013

For a B/S based registration system, online photos collection is an important but difficult task, Because there are strict requirements of format that photos have to meet and the management of photos is complicated and likely to be in chaos if there is no good photo storage strategy. To solve those problems above, this paper presented an online photos collection component which contains two solutions: online-cam and local photo upload to allow candidates to submit photo online by themselves. First, it analyzed the principle and design process of flash based online-cam in detail, and then illustrated the implementation of both solutions proposed above. This component has already been used in several registration systems, and effectively simplifies staffs work and improves the quality of photos.
Research of Personalized Information Service Based on Association Rules
Authors: Zhang Qing Song , Wang Xin Yu
Published: September 2013

Association rules mining technology is a new data processing technology. Its algorithm and application play a very important role in the library. Obtaining personalized information of readers effectively and automatically is the key to carry out individualized service of university library. By using association rules technology, the library mine transaction data generated in the process of library service. And it also can have an access to various types of readers' information demand model, thus can provide accurate service for readers.
Research of Transport Junctions of Flow Analysis Algorithm Based on Decision-Making Theory
Authors: Li Xiao Feng , Ding Shu Chun
Published: September 2013

Intersection traffic flow analysis and analysis of algorithms, design of algorithms, this paper, the vehicles unified identification as a standard car equivalent steps of the algorithm based on the decision-making on the flow of traffic junctions, the algorithm is applicable not only to single-coil detector or single magnetic detector such as a single detector, but also applies to dual-loop detectors. The detection process is simple and can achieve very high accuracy rate, and through case studies, to verify the effectiveness and accuracy of change algorithm
The Application of KBE on Stamping Process Design
Authors: Wang Ling Yun , Huang Hong Hui
Published: September 2013

UGNX6.0 is used as the development platform by its UG/KF development tools, fusing feature and knowledge together, so as to realize the process associated with the geometric design knowledge and stamping process design. Based on the features of stamping process, the classification of stamping process knowledge has been studied. With the object-oriented method, the rule-based and instance-based technology for expressing and acquiring the stamping process knowledge is discussed. Based on this, the stamping process model driven by knowledge has been established. A bending sheet was taken as an example in introducing the designing process of progressive die based on UG_PDW. The process arrangement was mainly introduced, and the bending part feature recognition and modeling were all elaborated and related examples were given in the paper. It showed the importance of the CAD technology in designing of relatively complex progressive dies.
A New Multi-Node Heartbeat Mechanism in Cluster System
Authors: Xu Li Xin , Zhang Yan , Fu Xiao Lin , Zhang Wei
Published: September 2013

Clustering System is constituted by interconnected dependent nodes, which can provide more reliable services for clients. Election is to choose a special nodes using for executing particular tasks from the nodes set. There are many election algorithms, Bully Algorithm is one of the classic algorithms, it is applied widely because it is easier to implement and the time wasting is controlled. However, the fixed priority rules of Bully Algorithm will lead the communication increasingly grow up with the system running time. Therefore, this paper presented the Balance Algorithm to solve this problem.
A Novel High-Birefringent Photonic Crystal Fiber and its Polarization Maintaining Properties
Authors: Zeng Jian Hui , Li Xu You , Hu Wen Bin
Published: September 2013

A novel high-birefringent photonic crystal fiber (PCF) was proposed and analyzed by full-vector finite element method (FEM). The modal field and birefringence properties were investigated. All of air holes in proposed PCF are round, and their diameters are the same. It is greatly reduce the difficulty of fabrication. According to the results of numerical analysis, it can be observed that the mode birefringence of this novel PCF can be easily achieve the order of 10-3 at 1.55μm. This research provides effective theoretical method for the fabrication, development and construction of high-birefringence photonic crystal fiber.
An Algorithm for Moving Target Detection in Dynamic Background Based on Gray-Weighted Kernel Function
Authors: Wang Lu Ping , Zhang Lu Ping , Zhao Ming
Published: September 2013

A new detecting algorithm based on gray-weighted kernel function is proposed for the moving target detection (MTD) in dynamic series of image.This algorithm firstly realizes image sequence registration by using the biggest gradient point. Then divides the image into 32*32 sub-images. The moving target can be finally detected based on the changes of gray-weighted kernel function. The testing result shows that the algorithm can detect the moving target in real-time and can suppress the influence caused by image registration error and gray fluctuation effectively.
Application of Similarity Algorithm in the Assessment of the Students Curriculum Design
Authors: Si Jin , Zhang Chun Hua , Sun Guo Chun , Gao Rui
Published: September 2013

Based on the students spelling errors frequently in the assessment of curriculum design, this article using the method of the similarity degree of the string matching between the error string and the keyword, and then assess the pros and cons of the procedure. First, this paper introduces a simple similarity algorithm on the keywords as the core. Because its limitations, then discusses the similarity algorithm based on semantic tree. It analyzes both cases of be the same or different of the character number of two strings in detail. Finally, provides a specific example to verify the feasibility and accuracy of the algorithm.
Research of Clustering Algorithm Based on Different Data Field Model
Authors: Meng Hai Dong , Wu Peng Fei , Song Yu Chen , Xu Guan Dong
Published: September 2013

Data field clustering algorithm possesses dynamic characteristics compared with other clustering algorithms. By changing the parameters of the data field model, the results can be dynamically adjusted to meet the target of feature extraction and knowledge discovery in different scales, but the selection and construction of data field model can give rise to different clustering results. This paper presents the different effectiveness of clustering based on various of data field models and its parameters, provides with the scheme to chose the best data field model fitting to the characteristics of the data radiation, and verifies that the best clustering effectiveness can be achieved with the value of radial energy in the golden section.
Construction Security Architecture of the Internet of Things Based on IPv6 Technology
Authors: Kuang Guo Fang , Kuang Chun Lin
Published: September 2013

IPv6 has huge address space, while 128 bit IPv6 address is divided into two parts, namely the address prefix and the interface address. IPv6 provides a wide range of security policies for Internet of Things safety system. The security of the Internet of Things applications interface IPv6 address can be used to identify the node. This paper proposes construction security architecture of the Internet of Things based on IPv6 technology. In the allocation of the state address safety issues and mobile IPv6 binding buffer security update issues, are able to meet the security needs of the Internet of Things.
Simulation and Study of Poisonous Gas Diffusion Based on ArcEngine Techniques about the City after the Earthquake
Authors: Li Pan , Feng Ji Lin , Huang Meng
Published: September 2013

This paper presents a dynamic simulation, using Gauss plume model and through component-based software development under ArcGIS Engine, of poisonous gas diffusion after an earthquake. Given certain meteorological condition, topography, and time interval, the simulation provides a satisfactory prediction about the locations and damage ranges of the diffusion process, and, therefore, helps the rescuers make emergency plans which could reduce disaster losses.
Software Development in Mining Subsedence Prediction
Authors: Yang Fan , Cheng Xiao Dong
Published: September 2013

Long-term scientific research and production practice show that there are rules to follow in mining influence, but the amount of measurement data collation and analysis not only cost of manpower, material resources, and calculation is very prone to error. Computer to replace manual calculation, not only convenient, quick, efficient, and adopts automatic generation technology by drawing graphs, is unattainable by manual technology. Mine land reclamation in mining subsidence is expected to software research for mining design, mining area coal mine district design, land compensation, land reclamation and comprehensive utilization technology work provides a scientific basis, promote the process of security coal pillar mining, ensures the mine in each work smoothly, improve the economic benefit of mine, to the national economy and the sustainable development of coal industry itself has important significance.
Research on Useful Life of Low Power LED Illumination Sources
Authors: Qi Wei Min , Xiao Jie
Published: September 2013

This paper reports experimental and simulation studies on degradation of optical power of low power LEDs due to current stress and temperature variation. The goal of this study was to study the effect of aging and ambient temperature on optical output power of light emitting diodes and to determine the effective lifespan of LED under stress condition. The LED samples were stressed at four levels of operating current 20mA, 30mA, 40mA, and 45mA with stress time up to 1000h. We find that degradation rate increases with increasing operating current. When LEDs are overstressed by driving at higher current the optical power degraded with stress time. A Mathematical model is developed to predict the behavior of LED at different operating current. Simulations are carried out with this model using MATLAB. Using degradation pattern at higher operating current the lifespan of LEDs was predicted at normal operating current.
Path Planning of Quadrotor Based on Quantum Particle Swarm Optimization Algorithm
Authors: Zhou De Xin , Ma Xin Chao , Ma Teng Da
Published: September 2013

Nowadays, it becomes a hot research topic for autonomous flight of Quadrotor in the complex environment and the realization of fully autonomous flight is still a big challenge. The path planning of unmanned aerial vehicle is a key problem for its autonomous flight. For the path planning of Quadrotor, using the quantum particle swarm optimization algorithm, and made a lot of simulation and actual flight experiments. The results of simulation and actual flight experiment show that the using of QPSO for the path planning of Quadrotor is able to obtain a satisfactory result.
A Fuzzy-Dynamic-Programming Approach to the Scheduling of Cascaded Hydropower Plants
Authors: Zou Jin , Pan Feng
Published: September 2013

An optimization-based algorithm is presented for the optimal operation of hydropower systems with cascaded hydro-plants. Continuous reservoir dynamics and constraints, discrete operating states, and hydraulic coupling of cascaded hydro-plants are considered in an integrated way. The main idea is to decompose the cascaded hydro-plants into individual plants, and then use Fuzzy Dynamic Programming (FDP), rather traditional Dynamic Programming (DP), to solve the subproblem of each plant while considering the hydraulic coupling of the plants. Numerical test shows that this method converges very fast, and is efficient and effective to deal with hydropower system with cascaded hydro-plants.
An Empirical Study for Chinese Sentiment Classification Based on Machine Learning Techniques
Authors: Pan Yi , Zou Jun Hua , Yuan Shuai
Published: September 2013

As the customer reviews become more and more on the Internet, It would be significant if these reviews are summarized automatically. Sentiment classification aims at predicting the semantic orientation of customer reviews, positive and negative. In this paper, we gave out the framework of sentiment classification, and empirically studied the performance when used different features, term weighting methods and machine learning methods. The experimental results suggest that using binary occurrence to weight the features is more suitable when used Naïve Bayes, but when used the support vector machine, tfidf-c can get the best performance. Besides, we also find that the sentiment terms are not suitable as features when used the approaches based on machine learning methods.
Study on Predicting Tumor Motion via Memory-Based Learning
Authors: Wan Wei Quan , He Zhi Qiang , Chen Chao Min
Published: September 2013

Prediction is necessary to compensate system latency in real-time tracking radiotherapy for thoracic and abdominal cancers. The paper proposes a memory-based learning method to predict respiratory tumor motion. The method first stores the training data in memory and then finds relevant data to answer a particular query. By fitting relatively simple models to local patches instead of fitting one single global model, it is able to capture highly nonlinear and complex relations between the internal tumor motion and external surrogates accurately and immediately. Furthermore, due to the local nature of weighting functions, it is inherently robust to outliers in the training data.
An Optimized Algorithm to Measure Arterial Blood Pressure
Authors: Zhong Man Li , Chen Min , Wang Qun
Published: September 2013

Blood pressure is one of the most important indexes for human beings health. This paper presents an optimized algorithm to measure arterial blood pressure based on oscillometric technique. The bilateral filter and Gaussian-fitting method are respectively expressed to apply in noise eliminating, oscillation pulse extracting and curve fitting. The systolic pressure and diastolic pressure are determined by combination of proportional coefficient method, maximum slope method and curvature method. Moreover, a judgment for arrhythmias is employed in heart rate calculation. Experimental results have proved the precision and accuracy of the algorithm.
Research on Reliability Assessment for the Armored Equipment Based on Multi-Source Information Fusion
Authors: Du Jian , Fei Bao Jun , Liu Ying , Yao Guo Zheng
Published: September 2013

In order to solve the problem of reliability evaluation for armored equipment, used Bayes fusion theory, combined with minimal amounts of reliability information on the field test, the paper fusioned reliability information of the same model for armored equipment, and completed the reliability assessment for a certain type of armored equipment. The test results show that the technology of multi-source information fusion can effectively solve the fusion problem of the prior fuzzy information and small sample test data, improve the accuracy of the reliability assessment, prove the feasibility and effectiveness for the multi-source information fusion in the armored equipment assessment.
Design and Implementation of Object-Oriented Teaching Aid System Based on UML Language
Authors: Song Rong , Liu Tao
Published: September 2013

According to the characteristics of teaching materials diversity and intuitive man-machine communication, the object-oriented teaching aid system based on UML language is designed. Firstly, the principle of UML language is introduced, then the functions of this aid system are described, that is, student information management, operational subjects management, courseware management and system management, etc. On this basis, the system design is analyzed and described from the aspects of design process, application course, data structure and data sheet maintenance, focusing on the refining design of the system, pointing out that this system data can realize the management on the information about students, assessment, courseware and users. Finally the application process of the system is described, which can facilitate the teaching task.
Web-Based Interactive Visualization of Virtual Reality
Authors: Jiang Wei , Dou Teng Fei , Zhou Bin
Published: September 2013

The integration of Internet and Multimedia Computer Technology provides new opportunities for e-commerce such as B2B/B2C. Web3D is emerging from the development of Internet and virtual reality. In this paper, we will use the specialty engine Unity3D as a development platform and JSP as a tool, to achieve the Web display system of virtual theater model, provided with accurate data, strong performance, virtual exhibition, interactive application. The platform across time and space limitations achieves a visual, vivid, more convenient information exchange to meet the demand for high-speed and efficient e-commerce information age for artistic performance enterprise publicity and marketing.
The Partial Inverse Minimum Connected Spanning Subgraph Problem with Given Cyclomatic Number
Authors: Ding Zhe Heng , Zhu Fang , Wang Qin
Published: September 2013

In this paper, we consider a partial inverse problem of minimum connected spanning subgraph with cyclomatic number . That is, given a subgraph, a cyclomatic number and a constraint that the edge weights can only decrease, we want to modify the edge weights as little as possible, so that there exists a minimum connected spanning subgraph with cyclomatic number and containing the given subgraph. For the case that the given subgraph is a connected subgraph with cyclomatic number , we solve the problem in polynomial time by contracting the subgraph. And when the given subgraph is a spanning tree, we solve the problem in polynomial time by using the MST algorithm.
Low-Cost Implementations of LED Intelligent Lighting Based on DALI
Authors: Ma Jian She , Liu Hong Lei
Published: September 2013

This paper describes a low-cost DALI system, which can be used to intelligently drive the LED array based on DALI , and can be used in the family field, thus eliminating the high cost of DALI control devices which stop the intelligent lighting system entering household. This article discusses the DALI system master and slave on the hardware & software structure. The innovation lies on communication via GPIO, besides, originally come up with new idea that users can communicate by distinguishing the value in the timer count register between two falling edge if the message is encoded as Manchster . Finally, experiment verified the feasibility of the program.
Multiple Data Source Discovery with Group Interaction Approach
Authors: Hao Wu
Published: September 2013

Medical researchers seek to identify and predict profit (or effectiveness) potential in a new medicine B against a specified disease by comparing it to an existing medicine A, which has been used to treat the disease for many years, called medicine assessment. Applying traditional data mining techniques to the medicine assessment, one can discover patterns, such as A.X=a à B.Y=b, which are identified at the attribute-value level. These patterns are useful in predicting associated behaviors at the attribute-value level. However, to evaluate B against A, we have to obtain globally useful relations between B and A at an attribute level. Therefore, this paper proposes a group interaction approach for multiple data source discovery. Group interactions include, such as rules, differences, and links between datasets. These group interactions are discovered at the attribute level. For example, R(A.X, B.Y), where R is a relationship, or a predication. Some examples are presented for illustrating the use of the group interaction approach.
The Application of Hybrid Genetic Algorithms Model in Solving Product Optimization Problem
Authors: Shao Xiu Feng , Zhang Jian , Li Li
Published: September 2013

We introduce basic theory of genetic algorithms in this paper, Build one hybrid genetic algorithms model base on genetic algorithms in solving product optimization problem. And we realize the model by software. The disposal result of real data tells us that the model has good practicability and accuracy to the problem of product optimization problem.
The Accurate Method for Removing Misalignment Errors from Testing Rectangular Optics
Authors: Li Zhu , Wang Xiao Kun , Li Song
Published: September 2013

The limitations of current interferogram reduction software with Zernike polynomials in analyzing rectangular interferogram are illuminated. The Zernike polynomials are no longer orthogonal over an rectangular region and have no explicit physical meanings. The reasonable mathematical model for removing translation errors is established based on least squares fitting. The experiment is carried on with a 200mm×75mm aspherical mirror by null-compensation, the misalignment errors can be eliminated from the original phase distribution exactly, thus the accurate surface map is gained, so it provides a guarantee for the superprecision fabrication.
Fuzzy Reliability Design on Mechanical Components under Normal Distribution Based on Entropy Theory
Authors: Li Zhong , Bo Yu Cheng
Published: September 2013

In fuzzy reliability design on Mechanical Components, the determination of characteristic value of subordinate function mainly depends on the experience that accumulated and summarized by researchers. Thus, it has strong subjectivity. In this paper, through entropy theory the relationship between determining characteristic value of subordinate function and reliability made a great description. Finally, the examples prove this methods feasibility.
Design and Implementation of a Digital Campus System Based on the URP Platform
Authors: Zhang Yan Hong , Cheng Yun Li
Published: September 2013

The development and construction of the university informationization has become the important means for universities to improve their management level and enhance the comprehensive competitiveness.Combining with the situation of our school, Researching an overall construction scheme of the Digital Campus System with a high level of intelligentized management and based on URP (University Resource Planning) is proposed. It focuses on researching these two aspects: the overall framework of this system and the campuss Integrated information portal. So as to achieve the greatest degree of sharing the information and resources, realize the real integration of the information technology and curriculum and promote the change from the traditional teaching methods to the new ones, as well as realizing the purpose of improving the quality of teaching, scientific research and management .
Schur D-Stability of Linear Grey Discrete Dynamic Systems
Authors: Han Jin Fang , Liu Zhi Chao
Published: September 2013

In this paper, the Schur D-stability problem for a class of linear grey discrete dynamic systems is studied in terms of the matrix eigenvalues theory and spectral radius approach. Several necessary and sufficient conditions and some sufficient conditions are obtained which can guarantee the Schur D-stability of linear grey discrete dynamic systems. The equivalence relation between the Schur D-stability and Schur stability of linear grey discrete dynamic systems is established.
Exponential Stability for Grey Linear Systems with Time-Varying Delay
Authors: Wang Ji Chao , Song Li Jun , Liu Wei , Han Jin Fang
Published: September 2013

In this paper, the exponential stability problem of grey linear systems with time-varying delay is investigated. By using the matrix measure theory and differential inequality approach, some practical sufficient conditions for guaranteeing the exponential stability of the grey linear systems with time-varying delay are presented. The grey-matrix measure and norm are also introduced.
Mathematical Model Establishment and Analysis on the Pipe Deformation under External Pressure with the Ovality
Authors: Yong Kang , Chen Wei
Published: September 2013

Beside the residual stresses and axial loads, other factors of pipe like ovality, moment could also bring a significant influence on pipe deformation under external pressure. The Standard of API-5C3 has discussed the influences of deformation caused by yield strength of pipe, pipe diameter and pipe thickness, but the factor of ovality degree is not included. Experiments and numerical simulations show that with the increasing of pipe ovality degree, the anti-deformation capability under external pressure will become lower, and ovality affecting the stability of pipe shape under external pressure is significant. So it could be a path to find out the mechanics relationship between ovality and pipe deformation under external pressure by the methods of numerical simulations and theoretical analysis.
On Business-Oriented Knowledge Discovery and Data Mining
Authors: Hao Wu
Published: September 2013

This paper will discuss issues in data mining and business processes including Marketing, Finance and Health. In turn, the use of KDD in the complex real-world databases in business and government will push the IT researchers to identify and solve cutting-edge problems in KDD modelling, techniques and processes. From IT perspectives, some issues in economic sciences consist of business modelling and mining, aberrant behavior detection, and health economics. Some issues in KDD include data mining for complex data structures and complex modelling. These novel strategies will be integrated to build a one-stop KDD system.
Analyses of Optical Emitter Performance in Terehertz Wireless Communication System
Authors: Li Ming Liang , Wang Cong
Published: September 2013

To resolve the limitation of information safety and transmission speed in existing communication system, it applied the modular design method to design optical-electric combined THz wireless communication system framework, and determined 125GHz carrier frequency. Aiming at the core component optical emitter uni-traveling-carrier photodiode (UTC-PD) in THz wireless communication system, it analysed the relationship between output power, bandwidth and input signal types, and determined the emitter bandwidth by experiment. The result shows that the transmission speed in the system is able to reach 3.0Gbps when BER is less than 10-10.
Fabrication and Optimum Design of Lens on Luminous Uniformity of High-Power LED
Authors: Qi Wei Min , Xiao Jie
Published: September 2013

The paper demonstrates the effect of lens inner structure on radiation pattern and light extraction efficiency of LED and the application to artificial light in compact greenhouse. A commercial software package of Trace Pro and one-factor at-a-time method are used to simulate the lens with different inner structure. The optimum parameters of lens inner structure design for the maximum light extraction efficiency and the best uniform luminous are described by the corner radius of curvature, lens width, and lens height, respectively. In comparison with a commercial artificial light of LED matrix used in agriculture, the high-power LED module with proposed lens inner structure exhibit good improvement in uniformity of illumination and light extraction. This study may provide a practical guideline for design and fabrication of a high-performance lens used in various compact agricultural applications.
Research and Development of the Standard Optical Fiber Light Source with Variable Degree of Polarization
Authors: Xu Nan , Li Jian Wei , Li Jian , Zhang Zhi Xin
Published: September 2013

Degree of polarization (DOP) is an important physical quantity for describing the optical polarization effect and is widely applied in optical fiber communication, optical fiber gyro and the related technologies. In this paper, the polarization beam combination method is raised to research and manufacture the standard optical fiber light source device with the variable DOP, and an indicated error measurement has been conducted for a DOP meter.
Designing a Tunable Filter on the One-Dimensional Ternary Photonic Crystal
Authors: Yu Hai Xia , Gao Xian Jun , Liang Guang Dong , Shi Yan Li
Published: September 2013

A tunable filter was designed, which using the liquid crystal as defect films based on the one-dimensional ternary photonic crystal. The spectrum transmission was obtained by using the transfer matrix method, analyze the properties of the band gap of the 1D ternary photonic crystal and main factors influencing the tunable filter. The results show that the filter has different job windows by changing the thickness increment of the adjacent medium behind the liquid crystal, and the tuning range of which has 30nm and above .
Investigation on Temperature Stability of Scale Factor for an Optical Voltage Sensor Based on Pockels Effect
Authors: Li Li Jing , Zhang Wen Hui , Li Hui , Pan Rui , Feng Xiu Juan
Published: September 2013

The temperature stability of scale factor (SF) has been analyzed and tested systematically for an optical voltage sensor (OVS) based on Pockels effect in this paper. The cardinal temperature sensitive parameters in sensor head and their impacts on SF are brought out by theoretical analysis and simulation method. Corresponding experiments are arranged to verify the validity of theoretical analysis. A real-time temperature compensation system is fabricated to reduce the error of SF in temperature fluctuation environment and its effectiveness is certified by experiment.
Multiformality of 1st, 2nd and 3rd-order Subschemes of Four-Level Optical Quantum Coherence Systems
Authors: Liu Xiao Dong , Dong Lei , Meng Dong Dong , Wang Sen
Published: September 2013

Many quantum optical and optoelectronic achievements have been obtained by using quantum coherence effects occurred in four-level quantum systems. Here we report a systemic study on the 1st, 2nd and 3rd order subschemes of the four-level scheme with the aid of Boolean algebra, and find 7 1st order subschemes and 53 2nd order subschemes in total. Further it is found that 472 3rd-order subschemes may appear in the realistic optical quantum coherence experiments when the applied lasers are distinguished only by the strong and weak field intensities.
A Novel Method to Realize Zero Phase Delay of Electromagnetic Wave
Authors: Dong Guo Yan , Yang Xiu Lun , Meng Xiang Feng
Published: September 2013

Zero phase delay of electromagnetic wave (EMW) transmission can be realized based on the wavefront modulation of photonic crystals (PhCs). When the phase velocity is controlled perpendicular to the group velocity with wavefronts (or phasefronts) parallel to the direction of energy flow, the phase will keep constant in transmission process despite of the increase of propagating length. The phase different between the incident and transmitted waves is measured to demonstrate that the phase can remain invariable in PhCs instead of zero-index materials or zero-averaged-index PhC superlattices. This effect can be extended to other artificially engineered materials, and will open a new route to obtain perfect zero-phase delay propagation for EMW.
Study of the Frequency Synthesizer in FH Radio Based on CMOS Chip
Authors: Yu Hai Xia , Shi Yan Li , Gao Xian Jun , Liang Guang Dong
Published: September 2013

The frequency hopping (FH) communication is one of the anti-interference effective means in military wireless communication, the FH number and FH rate of FH radio are the main parameters that determines the performance of the FH radio, these parameters are determined by the structure and the index of the frequency synthesizer, therefore the performance of the FH radio depends very much on the frequency synthesizer, this paper introduces the basic principle of FH radio, the basic methods of frequency synthesizer in the radio, the design scheme frequency synthesizer, and the DDS CMOS chip and the PLL CMOS chip that those used in scheme.
Molecular Dynamics Simulation on Terahertz Spectra of Methamphetamine Hydrochloride
Authors: Xin Yu , Oderji Hassan Yousefi , Hai Ran , Ding Hong Bin
Published: September 2013

Methamphetamine hydrochloride crystal (trade name Methedrine) that is one of the illegal drugs used as a stimulant to the nervous system has been considered to be detected by T-ray via the terahertz time-domain spectroscopy (THz-TDS). In this research, we simulated the THz spectra of Methedrine by molecular dynamics methods for the first time. The terahertz spectra at temperatures 78.4K, 200K, 294K and 400K in the frequency range of 10-100cm-1 were investigated, which exhibited the variation of spectra position and intensity with increasing temperature. Firstly, we used DL_POLY simulation package to obtain the instantaneous values of the dipole moment. Subsequently, the intensities of THz vibrational modes were obtained by the Fourier transform of the autocorrelation function of the dipole moment. The results showed our theoretical calculation by molecular dynamics simulations got a good consistency with available experimental spectroscopy. These are useful to determine the best conditions of temperature at which the terahertz time-domain spectroscopy of Methedrine results a highly informative spectrum.
The Domestic and International Research Situation of Photoelectric Interconnection Technology
Authors: Zhou De Jian , Cheng Lei
Published: September 2013

The definition characteristics and basic principles of photoelectric interconnection technology used in electronic products are summarized in this paper. The main technologies of the photoelectric interconnection used in electronic products, and its development trend are reviewed, and existing problems of photoelectric interconnection technology development are pointed out. Finally, this paper prospects development trends of photoelectric interconnection technology in the future.
Third-Harmonic Generation in Special Parabolic Quantum Wells
Authors: Yu You Bin
Published: September 2013

Third-harmonic generation in a special asymmetric quantum well is investigated. The third-harmonic generation coefficient is carried out by applying compact-density-matrix method. The numerical results are presented for a GaAs/AlGaAs asymmetric quantum well. The very large third-harmonic generation coefficient is obtained in this quantum well. Moreover, the third-harmonic generation coefficient dependents on the quantum well parameters are investigated, respectively.
RETRACTED: A Novel Material for Laser Diodes of Optical Fiber Communication
Authors: Wang Fang , Zhang Wei , Liu Yu Huai , Yang Shou Yi , Zhang Yuan Tao , Ryuji Katayama , Matsuoka Takashi
Published: September 2013

Retracted paper: The conventional material for the optical fiber communication laser diode is based on InGaAsP, which might be substituted by a potential candidate, InGaAlN. The new active region material, InN, is introduced regarding to its crystal growth and characterization, including the structural, optical and electrical properties. This material is promising for providing good performance of temperature stability of the wavelength. In addition, it is environmentally friendly.
Compression of Digital Hologram Based on Binary Holographic Interference
Authors: Gao Yan , Zhou Hao , Gu Ji Hua , Yang Tao
Published: September 2013

Since the resolution of digital micro-mirror device (DMD) which is used to reconstruct the digital holograms captured in experiments is relatively low, only a part of the digital hologram can be effectively reproduced in the experiment. For the hologram has the feature of high redundancy, in this paper, we propose that compress holograms based on Binary holographic interference. First, only the amplitude of the digital hologram is retained after Fresnel diffraction, recover the phase information from the amplitude, then generate a new compressed digital hologram with the phase and amplitude, and then process the new hologram according to the principle of binary holographic interference to improve the diffraction efficiency and to obtain a high-quality reconstruction.
Research of Asynchronous Communication Based on the 1394 Bus Network
Authors: Xu Jin , Wang Qiao , Tian Jian Wei , Mei Zheng Mao
Published: September 2013

This paper introduced the asynchronous communication mechanism in 1394 bus network, and described 1394 network communication system for building the network topology, node architecture and asynchronous transfer mode communication. We proposed a 1394 bus network asynchronous communication mechanism with high-security, high-reliability. At last it verified the communication in the network with one control computer and four remote nodes.
Design of 10Gb/s VCSEL Driver IC in 0.18μm CMOS
Authors: Li Wen Yuan , Zhao Qian Ru
Published: September 2013

A design of 10Gb/s VCSEL driver IC in 0.18μm CMOS process is presented. Employing directly coupled three stages of differential amplifiers, active degenerative feedback and C3A structure, the monolithically integrated circuit can amplify the amplitude of input differential signal to 22mA and offer a bandwidth of 9.4GHz at 10Gb/s with a total power consumption of about 91mW. The driver circuit can offer adjustable modulation current from 1 to 16mA and adjustable bias current from 1 to 10mA. The VCSEL driver can be used in the STM-64 optical fiber communication system.
One Data Transmission System for the Indoor Wireless Communications
Authors: Wang Xin , Chi Hai Dong , Zheng Tao , Cheng Wen Li
Published: September 2013

The indoor communications is a new market in the future. This Article introduces one data transmission system based with OFDM signals. The overview of the communication system and synchronization theory background will be introduced. The simulation results shown in this article implies that this OFDM system achieves excellent performance for indoor wireless communication.
Practical Enhanced Topology Discovery Algorithm for MANET
Authors: FU Hua Sen
Published: September 2013

In order to effectively manage the communication nodes in Mobile Ad Hoc Network (MANET), it is important to know the topology of such networks. Traditional Ad-hoc On-demand Distance Vector (AODV) protocol can not get the MANET topology due to the lack of the topology discovery mechanism. Aiming at this problem, an enhanced topology discovery algorithm based on AODV (AODV-TD) is proposed. AODV-TD can not only obtain the topology of dynamic network by topology discovery request, but also realize route discovery among nodes. Finally, the proposed algorithm is implemented on a hardware platform using CC1100, and the experiment results show that, even the network changes dynamically, AODV-TD can still discover the network topology rapidly and accurately, so that contribute to reducing the route discovery time and the RREQ forwarding packets.
The Analysis and Research of Intrusion Detection System Based on IPv6 Protocol Analysis
Authors: Fang Shi Lin , Wang Yue Bin , Yan Quan Feng , Li Yi , Li Wen Bin
Published: September 2013

In order to solve the security issue about network intrusion in IPv6 system, two modes of intrusion detection system based on IPv6 protocol analysis have been developed and designed. Based on these two modes, packet capture module, protocol analysis module, command parsing module and out-put processing module have been designed. The accuracy and efficiency of intrusion detection system based on IPv6 protocol analysis have been verified through the test focused on the key modules.
Research and Analysis about Array Antennas in Mobile Communications
Authors: Zhou Li , Hou Ming
Published: September 2013

Because the direction of a single antenna is limited, and for strengthening the direct radiant ability of the antenna, we will put the weaker direction antennas together in some way to constitute an antenna array system. The antenna array is also called the array antenna or a disperse antenna array. The antenna cell can be the symmetry center-fed dipole, the aperture antenna, the circle antenna or other forms of the antennas whose direction are limited. In practice, the antenna array is almost constituted of similar antenna cells. I have mainly completed the antenna array direction diagram in conditions of some kinds of parameters. And at last, I get the useful results for practice. This also provides theories basis for the analysis of smart antenna.
A Fuzzy Based Clustering Protocol for Energy-Efficient Wireless Sensor Networks
Authors: AbdulAlim Md Abdul , Wu Yu Cheng , Wang Wei
Published: September 2013

Minimization of energy consumption is one of the most important research areas in Wireless Sensor Networks. Nowadays, the paradigms of computational intelligence (CI) are widely used in WSN, such as localization, clustering, energy aware routing, task scheduling, security, etc. Though many fuzzy based clustering techniques have been proposed earlier, many of them could not increase the total network life time in terms of LND (Last Node Dies) with comparing to LEACH. In this paper, a fuzzy logic based energy-aware dynamic clustering technique is proposed, which increases the network lifetime in terms of LND. Here, two inputs are given in the fuzzy inference system and a node is selected as a cluster head according to the fuzzy cost (output). The main advantage of this protocol is that the optimum number of cluster is formed in every round, which is almost impossible in LEACH (low-energy adaptive clustering hierarchy). Moreover, this protocol has less computational load and complexity. The simulation result demonstrates that this approach performs better than LEACH in terms of energy saving as well as network lifetime.
Optical Transparent Behaviors of Double Plasmonic Arrays Sandwiched with a Metal Film
Authors: Chen Yuan Hao , Liu Gui Qiang , Zhang Xiang Nan , Huang Kuan
Published: September 2013

We propose a high tunable plasmon-induced transparency metal film structure which can be performed by double two-dimensional hexagonal lattice array of plasmonic nanoparticles inserted with a continuous metal film. The structure shows metal transparency in the optical regime. The transparency response in this structure can be efficiently modified by varying the thickness of the metal film, the size of nanoparticles, and the position of the nanoparticles. The structure proposed here may provide a new alternative approach to obtain transparent and highly conducting metal structures with potential applications in optoelectronic integrated circuits, plasmonic filters and transparent conductors.
An Improved Method Based on FPGA and DSP for Designing FBG Sensor Analyzer
Authors: Luo Xiao Qing , Hu Rong , Zheng Bing Hui
Published: September 2013

Fiber Bragg sensors become research focus of sensing technology, and have been widely used in many applications. This paper proposed a novel Fiber Bragg Grating sensor analyzer based on FPGA (Field Programmable Gate Array) and DSP (Digital Signal Processor) platform, which converted external parameter changes into wavelength shift in fiber Bragg gratings. The system can measure real-time temperature, strain, pressure, displacement and others through key steps including data acquisition, clutter Filtering, signal peak detection, Gaussian curve fitting and weighted wavelength calculation to carry out wavelength demodulation. Moreover, it is able to achieve fault diagnosis and positioning of the fiber link. Experimental results show that the system has advantages of low power consumption, good linearity, strong robustness, high precision and resolution on wavelength demodulation. And the system is still stable and reliable after a long test under different conditions.
The Optimization and Experiment of the Low-Pressure Water Jet Assisted Laser Etching on Al2O3 Ceramic
Authors: Chen Chun Ying , Yuan Gen Fu
Published: September 2013

The ordinary laser etching on Al2O3 ceramic could bring many problems. Here introduced a new process named low-pressure water jet assisted laser etching on Al2O3 ceramic. The new composite process is much better than ordinary laser etching on Al2O3 ceramic. And the water jet can greatly reduce the thermal cracks and slag which improved the quality of the Al2O3 ceramic surface apparently. It also shows that the parameters of the laser have complex influences on the etching surface quality. Here introduces the method of orthogonal experiment to finish the experiment. Via this method can not only reduce the times of the experiment but also clearly reflect the optimization of the experimental parameters.
Synthesis, Crystal Growth and Characterization of Organic Nonlinear Optical Co-Crystal: 4-N, N-dimethylamino-4-N-methyl-stilbazolium (3-nitrobenzenesulfonate)0.6I0.4
Authors: Yang Zhou , Dai Yi Qiang , Hao Hong Lei , Jazbinsek Mojca , Günter Peter
Published: September 2013

This report presents the synthesis, growth, crystal structure determination and second-harmonic generation efficiency of nonlinear optical co-crystal 4-N, N-dimethylamino-4-N-methyl-stilbazolium (m-nitrobenzenesulfonate)0.6I0.4 (DSIMNS). It is co-crystal of two DAST (4-N,N-dimethylamino-4-N-methyl-stilbazolium tosylate) derivatives. X-ray crystallographic analyses revealed that the crystal structure of DSIMNS is monoclinic, with space group P21. Kurtz powder test has shown that DSIMNS exhibits a large second-harmonic generation efficiency 500 times of that of urea.