bluuebunny/crossref_metadata_2025 huggingface dataset:
Molecular Dynamics Simulation of Diffusion Behavior for Thermalplastic Fusion Bonding
Authors: Sun Yi Bo , Luo Yi , Wang Xiao Dong , Feng Yu Qi
Published: March 2011

As a convenient way for the assembly of thermal plastic MEMS (Micro Electro-Mechanical Systems) devices fusion bonding was studied in molecular level. The diffusion behavior of polymer molecular chains was simulated by molecular dynamics. Amorphous PMMA (poly methyl methacrylate) layer were constructed. The interaction of PMMA layers in heating and cooling stages were simulated in NPT ensemble. In the simulation the PMMA molecular chains spread across the interface and entangled with the chains in the other layers. The factors including pressure and temperature which play important role in fusion bonding were analyzed in molecular level. System deformation was recorded in heating and cooling progress. Diffusion depth and binding energy in the model which had experienced heating and cooling simulation were obtained to investigate fusion degree. Deformation and fusion degree increase with larger pressure and higher temperature imposed to the system. It is concluded that only considering the diffusion of molecular chains parameters of relatively small pressure and high temperature are necessary to obtain precise bonding for micro joint, which is significant in guiding the precise bonding for micro assembly.
Research and Simulation of Routing Protocol in Different VANET Scenarios
Authors: Tong Meng Jun , Yu Li , Shu Chang Heng , Dong Qi Fen , Gao Feng
Published: March 2011

VANET is a special case of MANET , and will play an increasingly important role in road traffic management. VANET networks have different motion characters in different scenarios. Through the extension of the current network simulation software NS2, the different simulation scenarios were set up. Several typical Ad hoc routing protocols were simulated and analyzed in the streets and highways scenarios. Simulation results show that AODV and DSR have a relatively stable performance. The results have value in the research and application of VANET to traffic management.
The Maximum Detection Thickness for Flatness Detecting System of Hot Rolled Strip
Authors: Liu Zi Ping , Yang Guang Hui , Gao Run Quan
Published: March 2011

This paper began with the theory of laser-distance measurement and the composition of the flatness detection system, and mainly analyzed the error of the flatness measurement system of hot rolling strip caused by the installation and studied the maximum thickness which could be allowed to measure in order to ensure the measurement precision
Residual Life Assessment for Ferromagnetic Components Based on Metal Magnetic Memory Technology
Authors: Ren Shang Kun , Li Yi , Li Xin Lei
Published: March 2011

The fatigue crack growth experiment was carried out at room temperature for the standard SEB(3) specimens of 40Cr steel, the distribution of the surface magnetic field of the specimen under same load and different cycle numbers (N) was studied. By analyzing relations between the magnetic signals and the crack propagation life, a new damage parameter model has been established by magnetic signals. According to this model, we can evaluate the residual life of ferromagnetic components excellently. This belong to basic research on early damage inspecting and residual life assessment for ferromagnetic materials, it confirmed that residual life assessment and safety estimating for ferromagnetic components based on metal magnetic memory technology is feasible.
Effects of Wood Fiber Content on Structure and Properties of WF/PLA Bio-Composites
Authors: Guo Wen Jing , Bao Fu Cheng , Wang Zheng , Chang Liang , Gao Li
Published: March 2011

This study is devoted to investigate the effects of wood fiber content on structure and properties of wood fiber /poly(lactic acid) bio-composites (WF/PLA bio-composites). The WF/PLA bio-composites with WF from 30% to 60% and from 70% to 90% were prepared using melt extrusion and high-speed mixing methods respectively. The physical, mechanical, thermal, and macromolecular properties of WF/PLA bio-composites were evaluated. The results are as follows: Density of WF/PLA bio-composites increased when WF increased from 30% to 60%, and decreased when WF increased from 70% to 90%. Water resistance of bio-composite decreased with increasing WF content. The flexural strength of WF/PLA bio-composites were lowered when adding WF into PLA. The flexural strength decreased when WF increased from 30% to 50%, and then increased when WF increased from 60% to 80%. The flexural modulus of the bio-composite was higher than that of PLA without WF. Both n and w of PLA in WF/PLA bio-composite were decreased more than 70% with WF increased. The Tg, Tm values of PLA in the bio-composites were decreased with the WF increased. The cold crystal temperature (Tcc) was decreased with WF increased at low WF content. All the property changes were related to the decreasing of molecular weight of PLA in WF/PLA bio-composites.
Influence of Friction on Springback of Quadrangle Parts Bending
Authors: Su Chun Jian , Zhang Guang Heng , Guo Su Min , Gao Li , Ma Rui
Published: March 2011

Springback is the prominent problem in bending forming of sheet metal, which is difficult to control accurately, especially for the complex shaped bending parts. The change of friction conditions will cause significant changes of bending springback amount. The theoretical analytical model of quadrangle parts bending, which takes into account of the harden ability, anisotropy and elastic deformation of material, is proposed in this paper based on the plane deformation assumption and the bending theory of sheet metal, the quadrangle parts bending of wide sheet is analyzed theoretically, the approximate calculation relational expression is derived between friction coefficient and springback angle, and the influence of friction on springback is discussed. In the same conditions, the springback result deduced from theoretical formula is basically consistent with numerical simulation and experiment result.
Erosion-Resisting Properties for Chloride Ion of Short-Chopped Basalt Fiber Reinforced Concrete
Authors: Zhang Jun Zhi , Liu Hua Ting , Fu Zhao Qi , Wang Liang Ying , Zhou Sheng Bing
Published: March 2011

According to a test for chloride ion erosion in concrete under designed manual climate environment, distributions of chlorine ion concentration in pure bending concrete of short-chopped basalt fiber RC beam and check RC beam without fiber with different flexural loads are analyzed in this paper, and diffusion coefficients of compression and tensile concrete are fitted on the basis of Fick’s second law. Analysis results show that erosion-resisting properties for chloride ion of the basalt fiber compression and tensile concrete in the pure flexural region are increased
Exponential Stability for Uncertain Switched Neutral Systems with Nonlinear Perturbations
Authors: Liu Xiu , Zhong Shou Ming , Ding Xiu Yong
Published: March 2011

The global exponential stability for switched neutral systems with time-varying delays and nonlinear perturbations is investigated in this paper. LMI-based delay-dependent criterion is proposed to guarantee exponential stability for our considered systems under any switched signal. Lyapunov-Krasovskii functional and Leibniz-Newton formula are applied to find the stability results. Free weighting matrix and linear matrix inequality (LMI) approaches are used to solve the proposed conditions.
Tribological Behavior of Poly(ethylene Glycol)-Carbon Nanotubes
Authors: Li Xue Feng , Yan Han , Peng Shao Xian
Published: March 2011

Poly(ethylene glycol)-carbon nanotubes (PEG-CNTs) were successfully prepared. Results of four-ball tribotester indicated that both the load-carrying capacity and anti-wear of the PEG-CNTs were superior to those PEG owing to the additive reinforced by CNTs. The nanocomposite thin films have been fabricated on mica by spin casting technique. AFM investigations provide insights into the roughness and microtribological properties on a micro scale. The polymer in the film is the guarantee of flat surface, and the rigid CNTs enhance load-bearing property of the thin film.
Research on the Formula of Vibration Period of Multi-Ribbed Composite Slab Structure
Authors: Yuan Quan , Zhao Yuan Yuan , Liu Hai Tao
Published: March 2011

As a new structural system with a bright prospect, multi-ribbed composite slab structure has the advantages of ecological materials and seismic performance. In this paper, the formula of vibration period of multi-ribbed composite slab structure is discussed. Based on the analysis of FEM model and the regression analysis of experimental data, an empirical formula was put forward. It has been shown that the calculated results fit well with the test results.
Mechanics Analysis of Beam-Like Space Deployable Truss Mast
Authors: Guo Hong Wei , Liu Rong Qiang , Deng Zong Quan
Published: March 2011

A kind of beam-like space deployable truss mast with square batten frames supported by four longerons and two diagonal cables cross laced per face is described. A simple method for deriving mechanics parameters of the mast is presented. Element loads for mast to maintain self-equilibrating structure are calculated. Symbolic equations for the axial, bending, shear, torsional stiffness and bending strength of the mast are derived based on proposed method. Equations derived by simple method are consistent with expressions for the effective continuum mechanics of beam-like truss derived previously based on equivalent continuum method, these equations are helpful for mast preliminary design and mechanics analysis. Influence of mast structural parameters on mast stiffness and strength is analyzed, mast stiffness and strength can been improved by selecting reasonable structural parameters.
Epoxy Modified Polyurethanes Coated High Modulus Carbon Fiber: Synthesis and Properties Studies
Authors: Tian Yan Hong , Liu Zhan Qing , Kang Su Mei , Zhang Xue Jun
Published: March 2011

With toluene 2, 4-diisocyanate (TDI), polyethylene glycol (PEG) and 2,3-Epoxy-1-prop -anol (glycidol) used as the raw materials, two epoxy terminated polyurethanes (EPU) was synthesized by prepolymerization and closed end. Moreover, EPU with high toughhess is chosen as a coating agent for carbon fiber with three ethylene tetramine (TETA) as curing agen. The influence of the content of crosslinking agent in the coating layer on properties of composites and the mechanism of interface toughness are investigated. The chemical structure and thermal property of the EPU were studied with FTIR, 1HNMR and TGA, respectively. It proves that the thermal stability of EPU is more stable than epoxy coating. The interlaminar shear strength (ILSS) of the sized high modulus carbon fiber/epoxy composites is improved to 71MPa, which increased by 19.4% compared with the composites reinforced by unsized high modulus carbon fiber, and DMTA show that using EPU as a new kind of polymer coating for carbon fiber is a feasible method to improve the interfacial performance of high modulus carbon fiber/epoxy composites.
Identifying the Sentiment in Domain-Independent Chinese Sentences
Authors: Si Meng Wei , Su Ming Che , Wang Jia Yu
Published: March 2011

This paper describes a system that can automatically extract the topics from subjective Chinese sentences and identify their emotional tendencies. In the topic identification phase, the system bases on the dictionary containing the emotional words, dependency grammar and statistical pattern to identify the topic. In the sentiment identification phase, the system bases on the modifying relationship between the adverbs, negation words and emotional words to identify the emotional tendency. Finally, we choose a large number of Chinese sentences as our benchmarks to evaluate the system’s performance, analyze its error rate and propose directions for our future improvements.
Non-Destructive Testing and Performance Analysis of Glass Fiber Reinforced Soybean Straw Particleboard
Authors: Lu Wei , Hu Ying Cheng , Shen Jun , Yao Jia
Published: March 2011

Using the flexural vibration method of Fast Fourier Transform (FFT) non-destructive testing, the dynamic MOE of glass fiber reinforced soybean straw particleboard has been determined. The regression analysis among the dynamic MOE, the static MOE and MOR has been done, the significant correlation exists among the three values. And the prediction model has been built, the dynamic MOE can be used to realize the quality assessment by using the model. Using glass fiber to reinforce the soybean straw particleboard, the structure forms and positions of glass fiber have different effects on particleboard performance.
Case-Based Reasoning Based on Good-Point-Set Genetic Algorithm and its Application
Authors: Jia Rui Yu , Jia Zhao Hong , Geng Jin Wei
Published: March 2011

This paper discusses two intelligent learning methods—Genetic Algorithms (GA) and Case- based Reasoning (CBR), and analyses the shortcomings of the current techniques of CBR. The new idea is put forward by using the GA and good-point-set to solve the problems of CBR. An improved GA and Good-point-set GA are quoted here. We have applied the two GAs to assign the weights automatically of attributes in CBR systems.
Parameter Identification for the Dynamic Load Modeling Based on Denoising Method of the Measurement Data
Authors: Wang Li Di , Tang Jiang Feng , Shi Jun Sheng
Published: March 2011

Different denoising methods are used in parameter identification for the dynamic load modeling and the specific approach is proposed. The effects of different denoising methods including mean filtering, medial filtering and wavelet denoising are discussed. Mean filtering method is not helpful to contain the step changes of the measurement voltage, thus is unsuitable for the parameter identification process. Medial filtering method and wavelet denoising methods are suitable for the parameter identification in dynamic load modeling. Furthermore, experiment results based on the measurement data show that the wavelet denoising method is more efficient in some aspects such as the accuracy of identification and SSE.
Stability, Electronic and Magnetic Properties of Ca3Ru2O7
Authors: Xue Jin Hong , Chen Jing Chao , Yu Jie , Feng Jing , Pan Yong , Chen Rong , Lu Wen Ting
Published: March 2011

Ca3Ru2O7 is new tpye of thermoelectric materials.A theoretical study is presented for the stability, electronic and magnetic properties of three phases of this new thermoelectric materials in the framework of density functional theory (DFT). The calculated cohesive energy is -7.94eV/unit. AFM2 are less stable than other pahses. Electronic calculations indicate that Ca3Ru2O7 is metallic in nature. The covalent bonds in these structures are due to orbital overlap between p bands of O and d bands of Ru, and DOS at Fermi level are dominated by d bands of Ru. FM phase have obvious magnetic moments.
Study on Electronic Structure and Optical Property of Silicon Doped with Transition Metal by First Principles
Authors: Yu Jie , Chen Jing Chao , Pan Yong , Chen Rong
Published: March 2011

The First-principles based on plane-wave pseudo-potentials methods was applied to investigate the lattice parameter, electronic structure and optical property of pure Si doped with transition metal. The calculation result show that the lattice parameter decrease for Si doped with Cr and therefore the more stable structure, Si doped with Sc, Ti, V have opposite trend. Hybrid and electron transfer display intensely for Si doped with Cr from that with Sc, Ti, V. the absorption peak is located at the region of 2.42eV-2.80eV and the absorption coefficient increase intensely for doped Cr system.
Secure Distributed Computation in the Exponent
Authors: Wang Hong , Wei Shi Min
Published: March 2011

A secure multi-party computation problem deals with computing a function on any input, in a distributed network, ensuring that no more information is revealed to a player in the computation. New protocols are developed for the following interesting variation on a typical problem of secure multi-party computation: Given secrets shared among a group of players, compute the function value of basic computations, such as interpolation, addition, multiplication or inversion, in the exponent. The protocols can be proven robust and secure in standard computation models.
Researches on a Class of Reaction-Diffusion Thermo-Plastic Material Equations
Authors: Deng Shu Xian , Wang Ming Jun
Published: March 2011

This paper deals with a class of hyperbolic thermo-plastic material equation. The equation includes a reaction-diffusion-taxis partial differential equation, a reaction-diffusion partial differential equation. In the actual course of the discussion, we append a motility term in the equation. Then, the existence of unique global strong solution is proved using the theory of fractional powers of analytic semi group generators to new equation.
Empirical Study on the Impact of Split-Share Structure Reform on the Performance of Chinese Listed Companies
Authors: Yan Shao Bing , Guo Juan , Song Chun Qing , Zhu Wen Qi
Published: March 2011

This paper selected some listed companies of the manufacturing and information technology industry that have achieved full circulation by the end of 2008 and used factor analysis to study the impact on performance after the split share structure reform. By comparing horizontally and vertically, it came to the split share structure reform does improve corporate performance of listed companies in China; and then it analyzed the performance of listed companies on public life and economic area.
Quantized Kalman Filter for Sensor Networks with Random Packet Dropouts
Authors: Liu Na , Ma Jing , Sun Shu Li
Published: March 2011

Based on the projection theory and the uniform quantization method, a quantized Kalman filter is presented for sensor networks with random packet dropouts from sensors to the fusion center (filter). The bandwidths are scheduled by the optimality index that energy consumption is minimized under a given performance constraint. Compared with the filter without quantization, the quantized filter given can reduce the energy consumption and has an effective tracking performance. A simulation example demonstrates the effectiveness of the proposed algorithm.
Joint Routing and Spectrum Assignment Algorithm in Cognitive Radio Networks
Authors: Liu Zhan Jun , Qin Feng Xie , Chen Qian Bin
Published: March 2011

Aiming to the shortcoming of traditional route protocols in cognitive radio networks, joint cognitive routing and spectrum assignment (JCRSA) algorithm was proposed. According to the characteristic of cognitive network, the most capacity channel is selected as communication channel on every link, and JCRSA calculates the transmission delay on every link for a given packet, and then uses classic Dijkstra algorithm to find the smallest transmission delay route. According to the route table, spectrum is assigned on every link. Simulation results show that the End-to-End delay of JCRSA is less than that of traditional routing algorithm.
The Feasibility of Researching Computer Network Data Backup and Disaster Recovery
Authors: Wang Juan Ling , Hou Wei Zhou
Published: March 2011

The data backup and disaster recovery of computer network is an important security technology. Aiming at current network, enterprises and information system data are easier to infecting virus suffering hacker and losing data because of negligence. This article explores the computer network data backup and the feasibility of schemes in disaster recovery technical to ensure that the enterprise information systems should be safe and meet the necessary data backup.
Study on Energy Saving and Emission Reduction of EP Low-Voltage Power Supply System in Power Plant
Authors: Hu Man Yin , Du Chao , Yang Bo
Published: March 2011

According to operation situation of power plant’s EP, the technical measures of energy saving in low-voltage power supply system have been analyzed over the years. Based on the classical theory of electrostatic precipitator and the operating status quo of EP, the paper has been focused on the principles of energy-saving and emission-reduction EP, established high-voltage current supply energy-saving and emission-reduction EP dust removal efficiency of mathematical models, analyzed energy saving and emission reduction technical measures of the low voltage device and proposed the technical solutions. It provided reference for design, adjustment, operation and energy saving of power plant’s EP.
Inductive Estimation Arithmetic for Random Vibration Data
Authors: Zhang Yong Jie , Zhang Xiao Hu , Wang Bin Tuan
Published: March 2011

The vibration data processing of environmental spectrum is an important part of environmental reliability test for the aircraft. Based on the inductive methods for environmental measured data of vibration, an inductive arithmetic is employed to estimate the random vibration data of aircraft surface in Matlab system. Numerical experiments show that the inductive estimation arithmetic is effective, reliable and applicable for the environmental measured data of random vibration.
Digital Audio Watermarking Scheme Based on Independent Component Analysis in DWT Domain
Authors: Chen Rui , Lan Yu Lin , Mohammad Reza Asharif
Published: March 2011

This paper proposed a digital audio watermarking scheme based on independent component analysis (ICA) in DWT domain. The embedding process make full use of the multi-resolution characteristic of discrete wavelet transform (DWT), performing 3-level DWT. Selecting the low frequency coefficient appropriately as the embed location to make sure of the balance between the transparency and robustness. Then constructing the ICA model to embed the watermarking. The extraction process is similar with ICA’s goal, it’s used in extraction makes the scheme simple for implementation. The experiment results show that the proposed scheme has good robustness against common attacks, as well as transparency.
School Internationalized Operating Model and the Case Study
Authors: Zhu Yu Jin , Ren Jian Hua , Ding Hui
Published: March 2011

School internationalized operating model acts as a kind of school operating model, with the main task of taking the operating approaches of integration, disposition, control and occupation to utilize teaching resources of foreign school into the teaching, education, and management to enhance the efficiency, quality and standards of teaching, education and management of our school. These resources are the curricula, faculty, teaching techniques, education and school management technology of foreign school. Studies have shown that there exist three basic operating models. They are single-campus internationalized operating model; double-campus internationalized operating model and abroad operating model. By implementing the model of internationalized operation and developing internationalized cooperation and communication, school could broaden its version, could promote its operating standard as well as enhance it.
A Study of User Behaviors Based on MMS
Authors: Gan Tong , Zheng Yi , Chen Chang Jia
Published: March 2011

Multimedia Messaging Service (MMS) is an interactive communication process between people. So,we treat this network as a social network. In this paper we analyze user behaviors of MMS system. Using a province's dataset of China Mobile, we obtain almost entirely of the messages has been sent via GSM；VAS applications were very popular and profitable；The size and the storage time of message is very important for a MMS system；The in-degree and out-degree distribution both obey power law form. A big found is that users have acknowledgement effects between each other.
Research and Application on Monitoring Technology of Structural Health Based on Wireless Sensor Networks
Authors: Gao Zhi Jun , Wang Hong Yu , Chi Tie , Ma Bin
Published: March 2011

In this paper, we researched the monitoring technology of structural health which based on wireless sensor networks, and combined with the characteristics of structures, we designed a wireless sensor network monitoring systems, then the composition and topology of wireless sensor networks was proposed. At last, we used the improved ant colony algorithm to develop network energy-saving strategy which parameters are the energy of wireless sensor nodes, resized using node energy to control the routing between nodes, effectively reducing the energy consumption of wireless sensor monitoring network. The simulation result proved that the algorithm is effective, reliable and energy-saving effect.
Researches on a Class of Thermo-Viscous-Elastic Anisotropic Dissipative Material System Equation
Authors: Deng Shu Xian , Wang Zhi Wei
Published: March 2011

In this paper, we shall research on a class of thermo-viscous-elastic anisotropic dissipative material system equation. The analysis semi-group theory and two-dimensional singular integral operator identical relations are used in this paper; the equations denoted by some singular integral operator equalities are studied in two-dimensional round field. We shall push out the properties of the equations, the necessary and sufficient conditions of solvability. Furthermore, the formulas of their exponent operation are pushed out too.
Research on Personalized Recommendation Technology for Tourism Industry - A Perspective of a System Framework Design
Authors: Zhang Mu , Miao Jie , Luo Jing , Lan Jian Hua
Published: March 2011

When massive information brings people more channels to attain messages, there generates different types of new personalized recommendation systems. As the important sector for social development, tourism industry suffers the problem of information over-loading. In the construction of personalized recommender system mainly involves two problems: information acquisition and personalized recommender. This recommender system is able to form client’s databank after user’s login and assessment for various travel destination and products to support more accurate user’s information mining. The authors adopt improved hybrid recommender algorithm through combining collaborative filtering algorithm with content-based recommendation algorithm. The relationship of user and travel destination can be classified as the interested and disinterested. So it can predict the degree of new users’ enthusiasm towards different types of travel destination to realize personalized travel recommendation.
The Research on VRP Based on Max-Min Ant Colony Algorithm
Authors: Chen Chang Min , Xie Wei Cheng , Fan Song Song
Published: March 2011

Vehicle routing problem (VRP) is the key to reducing the cost of logistics, and also an NP-hard problem. Ant colony algorithm is a very effective method to solve the VRP, but it is easy to fall into local optimum and has a long search time. In order to overcome its shortcomings, max-min ant colony algorithm is adopted in this paper, and its simulation system is designed in GUI of MATLAB7.0. The results show that the vehicle routing problem can well achieves the optimization of VRP by accessing the simulation data of database.
Fractional Modeling Approach of Course Evaluation
Authors: Zhao Chun Na , Wu Min Hua , Zhao Yu , Li Ying Shun , Luo Li Ming
Published: March 2011

Course evaluation is necessary means to ensure the improvement of course construction level. A new course evaluation model is proposed based on the fractional order systems in this paper. An algorithm for linear fractional order systems founded on Grunwald–Letnikov’s fractional calculus definition is described. The fractional evaluation model is composed of fractional order and common coefficient. Model parameters can be determined by a large number of data and mathematical statistics method. The proposed model was applied to actual course evaluation work of Capital Normal University Information Engineering College. The practicability and effectiveness of the method have been validated.
Analysis on Network Security and Solution of Computer
Authors: Dong Ya Hui , Li Wei , Guo Xu Wen
Published: March 2011

Currently, the issue of computer network security becomes more and more serious. This thesis takes the main factors that affect the computer network security as the breakthrough, and pays attention to the analysis and prevention of various measures that are not conducive to the normal operation of computer network. It also fully discusses the situations that affect the computer network security from different perspectives in order to take preventive measures, remove adverse factors in the embryonic stage and ensure the security management and effective operation of computer network. This thesis proposes solutions from seven aspects, namely security and encryption technology, firewall technology, network address translator technology, security kernel technology of operating system, technology of anti virus in computer network, network backup system and security management.
Design and Control of Node Architecture in OBS Optical Network
Authors: Zhang Ning , Ge Mao Chang
Published: March 2011

In this paper, we analyse the optical burst switched (OBS) network, discuss the OBS node architecture. In OBS network, to construct a good data structure is very important. The OBS incoming data are assembled into basic units, referred to as data bursts, which are then transported over the optical core network. As to the OBS signaling, it is performed out of band by control packets that carry information such as the length, the edge-node-destination address. OBS is a promising solution for the all-optical WDM networks.
New Structure of Communication System for WDM Optical Network
Authors: Zhang Ning , Xu Xue Mei
Published: March 2011

In recent years, optical network has made great progress. Optical networking architects were concerned with medium access control protocols for optical switching, the combination of wavelength conversion, and optimum forms of network. How to apply the simple high-speed transfer function of the optical network node to the IP network is an important issue in achieving an IP and optical integrated network. In this paper, we present a new node structure which has a new function. Adding new nodes to a optical network based on this new design, we can make a connection to different network. It is important to provide solutions for various requirements such as integrated optical network scalability and support for various types of networks in an optical network.
Application Research of PID Control Optimized by GBLB-PSO in HVAC System
Authors: Liu Qi , Du Yuan Dong
Published: March 2011

Parameter optimization of PID control is always a hot spot in the research field of control, and control effect of PID depends on the parameter values: proportion, integral and differentiation. This paper puts forward a global best and local best PSO algorithm, which is an optimization strategy of PID, the result of this method making the system have small overshoot and short adjusting time. The optimization scheme of this paper will be used in the control of HVAC system. through simulation, it is shown that there is good effect, such as non-overshoot and short adjusting time. Compared with the traditional method, performance of this algorithm is well improved and optimized objective function is decreasing.
Fabrication and Photoelectrochemical Properties of Self-Organized Mixed Oxide Nanotubes by Anodization of Ti-2Al-1.5Mn Alloy
Authors: Liu Shi Kai , Li Yan Tao , Yang Hai Bin , Zou Wen Jun , Li Zheng Xin
Published: March 2011

Nanotubular films on the surface of Ti-2Al-1.5Mn (TC1) alloy were fabricated by electrochemical anodization technique in aqueous ammonium fluoride solutions at 20V for 3h. The photoelectrochemical activities of the nanotube arrays were investigated, as well as their phase, structure, composition and photoabsorption properties. The photo-absorption in the visible region and the photoelectrochemical response were improved obviously. It is attributed to the Mn ion doping of TiO2 lattices. Furthermore, the resulted nanotube arrays are expected to have bright application prospects for solar utilization.
Denoising in Steel Structural Impulsive Vibration Signal Based on Independent Component Analysis
Authors: Cao Jun Hong , Wei Zhuo Bin
Published: March 2011

The analysis of structure vibration signals is influenced by noise mixed in the signals. Independent component analysis (ICA) method is introduced to denoise the vibration signals in this paper. The representative algorithms: FastICA and JADE are told in detail. The algorithms are applied to separate steel structural vibration signals. The denoising performances in impulsive vibration signals generated by steel structure demonstrate the effectiveness and good robustness of ICA method.
GSPN-Based Analysis of Storage Infrastructures for Rendering System
Authors: Hong Zhi Guo , Wang Yong Bin , Shi Min Yong
Published: March 2011

By taking transmission delay into account, the optimization of distributed rendering environment (DRE) was concerned in this paper. Considering distributed animation rendering environment as the object of study, two Generalized Stochastic Petri Nets (GSPN) models for “completely distributed storage” infrastructure (CDSI) and “hybrid distributed storage” one (HDSI) were constructed respectively. Moreover, by choosing average time delay as the performance index, analysis was conducted by applying the equivalent formulas for solving Stochastic Petri Nets (SPN) models of serial and parallel types to these two GSPN models. Based on comparison of such models’ numerical simulation results, conclusion on these two infrastructures’ advantages and disadvantages is deprived thereby. It offers important quantitative foundations for choosing appropriate storage schemes and scheduling algorithms.
Machine Frame Optimization of Pneumatic-Hydraulic Supercharging Press of Microparts
Authors: Du Ji Tao
Published: March 2011

Aiming to the problems of the mechanical press such as ponderosity, big noise,operating inconvenience and wasting energy for forming micropart of sheet metal or nonmetal,The Pneumatic-hydraulic supercharging press of microparts was designed ,three dimensions model of press frame was built in virtue of Solidworks, the nine combinating frames were analyzed and optimized by FEM CosmosWorks, the corresponding maximum stress curve and maximum distance curve for the fixing plate were presented.The result shows that the throat dimension induces more remarkable influence for the maximum stress and the maximum distance .The sample press is developed, its structure is simple , reliable, safe and convenient.
An Effective Regularization Method for Image Super Resolution
Authors: Zheng En Wei , Wang Xian Jun
Published: March 2011

In this paper, we propose a new super resolution (SR) reconstruction method to handle license plate numbers of vehicles in real traffic videos. Recently, SR reconstruction shemes based on regularization have been demonstrated to be effective because SR reconstrction is an ill-posed problem. Working within this promising framework, the residual data (RD) term can be weighted according to the differences among the observed LR images in the SR reconstruction model. Moreover, L1 norm is used to measure the RD term in order to improve the robustness of our method. Experiments show the proposed method improves the subjective visual quality of the high resolution images.
A Method Shielding the Chinese Game Webpage Based on Ontology
Authors: Liu Jie , Bai Ling , Huang Xiang Yang
Published: March 2011

As online gaming addiction has a serious impact on the healthy growth of young people, this paper presents a method that uses the ontology to shield Chinese game webpage. This method, based on positive example webpages and counter example webpages to calculate weight of feature words, to establish domain feature thesaurus and make ontology; then according to positive example WebPages, calculate weight of ontology elements in all parts of webpage to get ontology element weight database; then intercept webpage from the network application layer, identify candidate webpage (candidate) based on domain feature thesaurus; finally carry out semantic relevancy computing and shielding the game webpages in candidates. Experiments showed the shielding accuracy rate had arrived 98.8%. The principle of the method can be extended to other domains.
Electrochemical Promotion Catalytic Oxidation of NO over Mn/TiO2 and Mn-Fe Catalyst
Authors: Song Jing Hao , Tang Xiao Long , Yi Hong Hong , Ning Ping , Li Kai , Yu Qiong Fe , He Dan
Published: March 2011

A new type electrochemical reactor was designed for electrochemical promotion catalytic oxidation of NO, which was a flat-plate fixed-bed reactor. The experimental results showed that the process of NO catalytic oxidation could be promoted though this electrochemical reactor with Mn/TiO2and Mn-Fe, which were two kinds of selected catalysts for NO oxidation. Approximately 70% NO could be converted to NO2at 50 °C when the input voltage of electrochemical reactor was 0.5v. Moreover, the reaction rates can be adjusted with the input voltage varying.
Privacy Preserving Coordinated Inventory Replenishment Policies in a Multi-Stage Supply Chain
Authors: Xie Cui Hua , Zhang Yu Lin
Published: March 2011

Most of the CRE solutions either assume existence of a central planner who has all the information about the system, or assume that each participant of the computation shares all of his information with other participants. These solutions, however, are problematic when the data is sensitive and the participants are reluctant to share their private, proprietary information. The development and deployment of privacy preserving coordinating model in supply chain based on common replenishment epoch could allow supply chain collaborations to take place without revealing any participant's data to the others, reaping the benefits of collaboration while avoiding the drawbacks. In this paper, secure multi-party computation protocols are applied in the problem of a multi-stage supply chain, where the objective is to find a CRE policy for each facility in the system such that the total average ordering and inventory-related cost of the entire system is minimized.
A Optimized MRP Batch Decision Model and its Application
Authors: Zhang Yi , Liu Yun Xia
Published: March 2011

The key of decision-making of manufacturing resource planning is material requirement planning (MRP). The traditional computing method of MRP is not efficient while the market is fluctuant and the customer demands are different. A new kind of optimized MRP model based on the real supply environment and the real demand is presented in this paper.The new optimized MRP model can improve the material demand plan effectively. Some aid information for decision-making such as price, ordering costs, holding costs, the working capital and restraint for safety stock are taken into account in the optimized MRP model. The discrete characteristics of the net requirements are considered in this new optimized MRP model, and this new model can make the decision-making of production process dynamically respond to the changes of real demand efficently.
An IDS Alert Aggregation Method Based on Clustering
Authors: Zheng Qiu Hua , Xuan Yi Guang , Hu Wei Hua
Published: March 2011

How to aggregate and reduce duplicated alerts is one of the most important tasks in IDSs. This paper proposed an alert aggregation method, which clustering similar alerts into a hyper alert based on category and feature similarity. For each feature we define an appropriate similarity function. The overall similarity is weighted by a specifiable expectation of similarity. Experiments on DARPA2000 data set have demonstrated the effectiveness of this method.
Molecular Characterization and B-Cell Epitopes Prediction of the Antigen pEtK2 of Eimeria Tenella
Authors: Chen Xi Wen , Yin Miao , Wang Xiong Qing , Fang Chun Lin
Published: March 2011

Avian coccidiosis，caused by parasites of the genus Eimeria, is a major intestinal disease of chickens. In order to develop a new generation of vaccine which can provide a safer, more effective and cost-effective approach for avian coccidiosis control, bioinformatic and molecular approaches are used to predict and analyze the molecular characterization and B-cell epitopes of Eimeria antigens. In the present study, the molecular characterization and B-cell epitopes of the antigen pEtK2 of Eimeria tenella（E.tenella）were predicted by using of bioinformatics techniques. The pEtK2 gene was predicted to encode a polypeptide of 487 amino acids with a putative molecular mass of 55.102 kDa , and a predicted isoelectric point of 5.707. The acid sequence analysis showed that the potential antigenic epitopes are situated in 1-19,51-70,135-154,237-255,279-299 and 420-439 amino acids. The results obtained from the present study may provide necessary data for further study of E.tenella pEtK2 and development of recombinant vaccines and epitope vaccines.
Design of Catalytic Divided Wall Column
Authors: Sun Lan Yi , Qi Cai Xia , Li Jun , Li Qing Song
Published: March 2011

The Catalytic Divided Wall Column (CDWC) for hydrolysis of methyl acetate (MeAc) is designed and optimized. Distillate rate and side rate of CDWC are used to maintain the desired product purities, and the minimum reboiler duty is obtained by changing the reflux ratio and vapor split ratio. The result shows that the new process can save energy consumption by 20.1%.
The Studies of a Temperature Monitor System for Electric Equipments Based on Infrared Technical and Virtual Instruments
Authors: Cui Hao Yang , Tang Zhong , Fang Yong , Liu Jun , Qian Ting , Yang Chun Xu
Published: March 2011

Temperature is one of the most important parameters to evaluate the status of electric equipments. In this paper, a temperature monitor and query system based on virtual instruments and infrared temperature monitoring technical is introduced, including the hardware build-up and software realization. The system a multiple function system, including measurement and control parameter setting; data acquisition and processing; data, chart and graph displaying; signal processing and analyzing; data saving and so on. It can meet the need of the precision request in the temperature measurement of electrical equipment. Also it can be applied in other related experiments and developed further.
Implement a Control Mechanical Legs System by EMG Signals
Authors: Wang Ching Sung , Chiang Yen Ju , Chang Chih Chung , Lin Jia He , Lin Wei Jie , Jheng Siang Jyun
Published: March 2011

As an auxiliary facility to assist a disabled patient to perform a normal walk, the crutch or the wheelchair is considered to provide an essential mobility as a mechanical facility. However, these facilities can not provide a basic function for these patients to sustain a standing position except a mechanical prosthesis. To control the activity of the prosthesis, a muscle membrane potential produced via an arm swing during the period of a walk is used as a control signal. In this paper, we adopt a dual ADC interface on a STM3210E-LK board to extract two kinds of muscle membrane potentials on a single arm. These two potential signals can be used to control the activities of the mechanical prosthesis. In the experiment we use these two potential signals to control the activities of a humanoid robot to simulate the activities of the mechanical prosthesis.
On Efficient Allocation of Military Spending
Authors: Mao Fei , Wang Yu , Wang Mei
Published: March 2011

The current theory of military spending allocation is the product of traditional security concept. With the development of national security concept, theoretical innovation is in request. On the basis of the Smith`s neo-classical model and according to the multi-threats environment we established an efficient allocation of military spending model. This model indicates that in the current and future periods, the optimal scale of military spending allocated on protecting non-traditional security should be 4% of total military spending. This conclusion also shows that the ability of carrying out traditional military operation is still the core military capability.
OHCP: A Local Search Planner Based on Ordered Hill Climbing Algorithm and Local-Minimal Restart Strategy
Authors: Liang Rui Shi , Ma Hui , Huang Min
Published: March 2011

This paper describes OHCP, a fast planner using local search based on Ordered Hill Climbing (OHC) search algorithm and local-minimal restart strategy. OHC is used as a basis of a heuristic planner in conjunction with relaxed planning graph heuristic. A novel approach is proposed in OHC framework to extract useful information from relaxed plans to preorder all promising neighborhoods, which can cut down the frequency of calling the heuristic evaluation procedure. In order to preserve completeness and improve search effort, a new restart strategy for complete search from local minimal is proposed when the local search guided by OHC fails. The ideas are implemented in our planner OHCP. Experimental results show strong performance of the proposed planner on recent international planning competition domains.
Image Acquisition for Pressed Protuberant Characters on Metal Label
Authors: Li Guo Ping , Liu Hua Guan , Ai Chang Sheng
Published: March 2011

The pressed protuberant characters on metal label are the difference of reflectance. It is very difficult to obtain the character of full binary image directly. It has presented a novel method of image acquisition on metal label pressed protuberant character based on moiré contour. At first, the principles of moiré contour were analyzed; Secondly, the experiment parameters were designed by using of shadowing moiré equipment and pressed characters’ height. The moiré image of metal label is captured through experiment by using of CCD camera. The binary image of pressed characters was output using moiré fringe image modulated by the characters’ height as input image contrast enhancing, complement, middle filter, automatic threshold etc. The binary image of pressed character was obtained using image preprocessing. At last, the binary images of moiré contour obtained and direct obtained were compared. The experiments show that the binary image of moiré contour obtained is better than direct obtained image.
Performance Simulation and Analysis of New High-Frequency Valve
Authors: Zheng Yong Zhen , Jian Ruan , He Yong
Published: March 2011

This article described the design idea, advantages and operation principle of the new high-frequency valve, designed and analyzed its mathematical model. The rotary motion and axial sliding of valve core are used to realize the independence control of excitation frequency and amplitude. The high-frequency excitation can be achieved by increasing in the number of spool table and selecting the matching relationship between the spool and sleeve valve to improve the spool valve cover window grooves and the communication times per revolution.
The Construction of E-Portfolio Based Web Autonomous Learning Environment
Authors: Li Li , Wang Kun Ling
Published: March 2011

Web-based autonomous learning environment is the circumstances and conditions in the process of learning activities with the introduction of the network factors, its basic elements not only include the support of courses contents, instructional strategies, teaching mode and resources, but also cover instruction design, management, evaluation and other areas. The e-Portfolio (Electronic Learning Portfolio) is a collection of the learner’s experiences and achievements during a period of educational activity, which has advantages in dynamic tracking, recording, collection, evaluation ,management and other aspects, the interposition of E-Portfolio provides new thought of the construction of web-based Autonomous Learning Environment. In this article, on the base of studying web-based autonomous learning and E-Portfolio, the author mainly discussed the construction of e-Portfolio based autonomous learning environment in E-learning.