bluuebunny/crossref_metadata_2025 huggingface dataset:
A Nano-Structure Memristor and Key Manufacture Technologies
Authors: Bai Xiao Hui , Wen Dian Zhong
Published: April 2011

This paper implement a nano-structure memristor which based on HP lab memristor.Using electrolyte compose method making Pt nanowires act as nano-structure wires, becoming point contact from liner contact to will enhance quantum effect. Giving key production technology of Pt nanowires,TiO2, TiO2-Xthin films.
Study on the Application of Weak Signal Recovery System Based on the Stochastic Resonance
Authors: Deng Hui , Li Zhang
Published: April 2011

Stochastic resonance (SR) enhances the nonlinear system behavior with the assistance of noise. The energy-transfer mechanism makes the weak information revealed in the output spectrum, while the time-waveform is distorted. The factors causing the deviation in the output are presented and the function of the recovery system is proposed. The numerical simulations reveal that the SR recovery method can recover the waveform containing weak information submerged in noise effectively.
Isolation and Screening of Endophytic Antagonistic Bacteria to Camellia Soft Rot Disease and 16s rDNA Sequence Analysis
Authors: Zhou Guo Ying , Li Xue Jiao , Bu Ting Ting
Published: April 2011

This experiment isolated a series of endophytic bacteria strains form the healthy Camellia leaves. And the strain L32 had significant inhibitory effect to Camellia soft rot disease pathogen. The strain colonies in PDA medium was circular, surface drape, colony propagation rate was faster, ivory; in the early stage of growth the colony edge was neat; and later stage of growth it became corrugated, the centre of colony was uplift and opaque. Carry on the physiological and biochemical experiments and molecular identification, it was judged that the strain L32 had high relationship with the Bacillus subtilis.
Advanced Processing of Biologically-Treated Leachate by PAC
Authors: Zhang Hai Ying , Chen Dong Hui , Zheng Yi , Qi Jing Yu
Published: April 2011

In this study, biologically treated leachate was treated using PAC and PAC + PAM, respectively, to study removal efficiency of COD, SS and color as a function of such influencing factors as pH, dosage of PACand/or PAM. It was found that optimal dosage and pH are 800 mg/L and 6 for PAC. The optimal condition when using PAM + PACfor removal of COD was 10-minute reaction, pH of 5, PAC dosage of 800 mg/L, PAM dosage of 3 mg/L. Effluent quality after coagulation at the optimal conditions met requirements of the tertiary standard described in “Integrated wastewater discharge standard”. Coagulation using PAM + PAC at the optimal condition was recommended for advanced treatment of refractory leachate after biochemical treatment.
A Novel Structure Design of 4-DOF Spatial Compliant Parallel Manipulator
Authors: Zhu Da Chang , Gu Qi Hua , Wang Liang , Xiao Fan
Published: April 2011

A novel type of 4-RPUR spatial compliant parallel manipulator which named whole compliant parallel manipulator (WCPM) is presented in this paper. Compared with traditional design method, a novel 4-RPUR type spatial compliant parallel manipulator which satisfy the geometrical constraint conditions in spatial is proposed. By using ANSYS software, the proposed two kinds of compliant parallel manipulator are analyzed. The effectiveness of the proposed method is verified by simulation and experiments.
Comparison of Digestion Methods for Analysis of Heavy Metals in MSWI Bottom Ash
Authors: Zhang Hai Ying , Zheng Yi , Hu Hong Tao , Qi Jing Yu
Published: April 2011

This work aims to develop a proper digestion method for measurement of heavy metal content in municipal solid waste incineration (MSWI) bottom. Different digestion methods by HNO3, HNO3/HCl, HNO3/HCl/HClO4, HNO3/HCl/H2O2, HNO3/HClO4, HNO3/H2O2, were compared in digestion efficiency, and Cu, Pb, Zn and Cd were analyzed using atomic absorption spectrum (AAS). The method using mixed HNO3/HCl/HClO4 was recommended for digestion of MSWI slag for measurement of Cu, Pb, Zn, and the method of HNO3/H2O2 recommended for digestion for measurement of Cd.
Research and Implementation of Mixed Access Control Model
Authors: Huang Long Jun , Zhou Cai Ying , Wei Yuan Wang , Dai Li Ping
Published: April 2011

The scale of modern systems is increasingly large, the system safety requirements have become more sophisticated, a single access control model could not do. In view of this situation, this paper presents a core RBAC, integration MAC, DAC thought and proposed a hybrid access control model - M-AC model (Mixed Access Control Model). The model is fully three kinds of advantages of the traditional access control model to eliminate each other's shortcomings, to meet the large-scale complex systems, the stringent requirements for access control. In the formal definition is given of the model, as well as rules, with an actual project, the implementation of the model methods are analyzed and studied.
Circuit Design Based on Particle Swarm Optimization Algorithms
Authors: Yan Xue Song , Wu Qing Hua , Hu Cheng Yu , Liang Qing Zhong
Published: April 2011

This work investigates the application of Particle Swarm Optimization (PSO) algorithms in the field of evolutionary electronics. PSO was developed under the inspiration of behavior laws of bird flocks, fish schools and human communities. PSO achieves its optimum solution by starting from a group of random solution and then searching repeatedly. We propose the new means for designing electronic circuits and introduce the modified PSO algorithm. For the case studies this means has proved to be efficient, experiments show that we have better results.
Modeling of Stochastic Von Neumann Model of Mobile Service
Authors: Xu Fang Qin , Jiang Lei
Published: April 2011

A stochastic Von Neumann model to describe companies’ input-output process on mobile services is provided. Through the theories from input-output economics, an extended singular stochastic Von Neumann model on mobile service is researched. The problem of stability of this kind of stochastic Von Neumann model on mobile services is researched. A new mathematic method is applied to study the singular systems without converting them into general systems. The parameter uncertainties are considered. A new stability criterion for the extended stochastic Von Neumann model is given to ensure the stability of input-output model.
Study on LPG Air Fuel Ratio Based on Improved Subtractive Clustering RBF Neural Networks
Authors: Lin Yong Man , Feng Zi Ping , Guan Hai Feng
Published: April 2011

The paper refers to the mathematical model of gasoline engine, and builds liquid-jet LPG(Liquefied Petroleum Gas) engine model. Based on the model, when the specific of the parameters distribution of operating engine are known, RBF neural network can estimate center value and the number of hidden layers precisely, and control engine A/F in fine range. But the parameter features of operating engine are unknown in advance. The paper provides a improved subtractive clustering - RBF neural Networks algorithm to control A/F of LPG engine. Simulation shows, improved subtractive clustering can precisely determine the number of neuron of RBF neural network hidden layers under unknown operation parameters, and the precision is higher, and self-study and adaptive adjusting is better than before.
Effect of Oxide Film Thickness on Stress-Strain Field at the Tip of Stress Corrosion Cracking
Authors: Tang Wei , Xue He , Zhao Dan
Published: April 2011

Environmentally assisted cracking (EAC) or stress corrosion cracking (SCC) of key structural materials in the environments of the light water reactor is one of the main problems for the management of the structural safety and service life of nuclear power plants. To understand the effect of oxide film thickness on SCC growth in structural materials in a high temperature water environment, the stress-strain field at the tip of a SCC in nickel base alloy constituted by base metal and oxide film was analyzed in this paper by finite element method using commercial software. The effects of oxide film thickness on the stress-strain field at the tip of the SCC was obtained, which provides a new insight into the research of the mechanism of SCC growth in structural materials in a high temperature water environment.
Study on Optimum Structure and Residual Stress of Ti/TiAl Micro-Laminated Sheet
Authors: Ma Li , He Lu Ju , Wang Hai Bo , Wang Gu Ping
Published: April 2011

The residual stress and the effect of microstructure parameters on failure performance of Ti/TiAl micro-laminated sheet were studied by Correlative theory and FE method. The results showed that the fracture work increases gradually with the increasing of layer number or thickness ratio. However, the rising extent reduced gradually and when the two parameters exceeded a certain value, the fracture work would not be changed. The value of residual stress reached its maximum at the centre and reached its minimum at the edge of micro-laminated sheet. Residual stress in Ti layers and Ti-Al layers was compressive stress and tension stress respectively. With increasing of layer number or thickness ratio, compressive stress would rise gradually and compressive stress would reduce gradually.
A Novel Series Inflation Prediction Model Based on the Grey Fuzzy Theory
Authors: Zhang Yan Qing
Published: April 2011

Along with the economy development and the living standards enhancement unceasingly, the inflation also accompanies naturally lives. Generally speaking the temperate inflation has not the enormous influence to people's life and the national economy, but the serious inflation's occurrence can affect a country exchange rate level, disrupt the import and export order and financial order, simultaneously, will affect the people revenues and the living standard, will cause the national competitive power to drop. In view of this problem, it is necessary to construct the model to forecast the year in the future that will occur the serious inflation. This paper construct the predict model base on the grey fuzzy theory, the experimental simulation is shown that the results is accuracy and reliable.
Analysis of the Influence of Reinforcement Parameters on Springback of U-Shape Part
Authors: Shi Qi Qi , Lin Jian Pin , Lv Mao  Kang , Chen Ke
Published: April 2011

The sidewall curl caused by springback widely exists in the U-shape part especially to the advanced high-strength steel. Based on the mechanism of springback and the curl, this paper proposes that the reinforcement is useful to control the U-shaped part’s sidewall curl. The influence law of section parameters such as width, height etc on springback are analyzed. Then a sensitivity analysis was conducted and the prior order of sensitivity factors is given. The result indicates adding the geometric features of reinforcement to part is effective to control the springback and also provides the advice for the springback engineering control in the beginning of part design.
Simulation and Validation of Temporal-Spatial 2-Dimensional Correlated Radar Clutter Based on SIRP
Authors: Li Ting Jun
Published: April 2011

Non-Gaussian probability distribution radar clutter not only is temporal correlated between different pulses, but also is spatial correlated between different range bins. In this paper, the method of simulation and validation of radar clutter is proposed using spherically invariant random processes (SIRP). The amplitude probability function and temporal correlation function of radar clutter can be controlled respectively, and the spatial correlation function can be also specified. The computer simulation of K-distribution and CHI-distribution radar clutter is used to validate the method, and is to validate the amplitude probability function, temporal-spatial 2D correlation function.
Wireless Multicast Opportunistic Routing with Dual Network Coding
Authors: Daru Pan , Han Zhang
Published: April 2011

Wireless Multicast is one of the important problems with applications to opportunistic networks, such as delay-tolerant networks (DTNs), personal, pocket-switched networks (PSNs) etc. Network Coding has received many attentions because it improves potential network throughput and robustness by the way of combining multiple packets in the routers and reducing the transmissions. This paper combines network coding with opportunistic routing to improve the throughput of wireless multicast, where an Inter-coding and Intra-coding scheme is introduced to the traditional multicast routing algorithm (OR-DNC, Opportunistic Routing with Dual Network Coding). Compared with traditional multicast routing without coding and MORE-M, OR-DNC performs better in terms of throughput, transmission reduction and coding gain.
Phase-Space Wave Functions of Diatomic System in One-Dimensional Nanomaterials
Authors: Lu Jun
Published: April 2011

The exact solutions of the stationary Schrödinger equations for the diatomic system with an empirical potential function in one-dimensional nanomaterials are solved within the framework of the quantum phase-space representation established by Torres-Vega and Frederick. The wave functions in position and momentum representations can be obtained through the Fourier-like projection transformation from the phase-space wave functions.
Affine Texture Analysis with Scale-Area Histogram
Authors: Song Qiang
Published: April 2011

A major problem of texture analysis is that textures in the real world are often not uniform due to variations in orientation, scale, or other visual appearance. In this paper, affine texture analysis with texel scale-area histogram is presented. A textural image is decomposed into a set of scale images and each scale image consists of square texels of the same size. The scale-area histogram of texel is used as texture feature for multi-scale texture analysis and dominant texture scale analysis. Measurement of the dominant texel sizes of textural images with different rotation angles and spatial scales indicates that rotational and scaled transformations of textural image result in the motion of translation in scale-area histogram.
Numerical Simulation and Analysis on Magnetizing Exciter for Magnetic Flux Leakage
Authors: Song Qiang
Published: April 2011

Magnetic flux leakage (MFL) is a non-destructive testing method used to inspect the pipe and magnetization of the pipe wall to saturation is essential for anomalies to be reliably and accurately detected and characterized. Axial components of magnetic flux density obtained during the MFL inspection have been simulated using three-dimensional finite element analysis and the effects of magnetizing exciter parameters on magnetic flux density are investigated. The pipe modeled in this paper has an outer diameter of 127mm (5 in.) with a wall thickness of 9 mm (0.354 in.). According to numerical simulations, an increase in the magnetic flux density of pipe wall is observed with an increase in the permanent magnet length and height. It clearly illustrates that Nd-Fe-B permanent magnet assembly with 70 mm length and 40 mm height may magnetize pipe wall to near saturation.
Design and Synthesis of Er2O3 Films for Antireflecting Coatings
Authors: Zhu Yan Yan , Xu Run , Fang Ze Bo , Zhao Yu , Li Hui Yu , Chen Jing , Cao Hai Jing
Published: April 2011

Reflectance design and synthesis for Er2O3single layer and Er2O3/TiO2double layer are made. The optimum reflectance and thickness are determined. The developed simulator can be used for the optimization of antireflecting coatings for optoelectronic devices to improve the power output parameters.
A Fast and Efficient Time-Delay Estimation Algorithm for Sound Localization
Authors: Liu Guan Qun , Zhang Ru Bo , Xu Dong
Published: April 2011

Time-delay estimation is an important research topic of sound localization. According to the specificity of time-delay in sound localization, a fast and efficient time-delay estimation algorithm is proposed based on the principle of fast linear cross correlation. Relative to the original time-delay estimation algorithm based on fast linear cross correlation, the proposed algorithm has enormous advantages in the time complexity and space complexity. The computing speed is twice faster than the original time-delay estimation algorithm, while the size of the memory space used is half of the original time-delay estimation algorithm.
RBF Neural Network Based Adaptive Tracking Control for a Class of Nonlinear Plant Using Stochastic U-Model
Authors: Wang Bin , Liu Cai , Wu Xue Li , Liu Lei
Published: April 2011

In this paper an adaptive tracking control algorithm and its step by step implementation procedure are developed for a class of nonlinear plants within a U-model framework with unknown parameters. With the author’s previous justification, not only the control oriented model represents a wide range of smooth (polynomial) nonlinear dynamic plants (without using linearisation approximation at all), but also make almost all linear control system design techniques directly applicable (with a root solver bridging the linear design and calculation of controller output). A new technique is proposed to design an online control algorithm using the Radial Basis Functions Neural Network (RBFNN). The plant parameters are estimated online and are used to update the weights of the RBFNN. The weights update equations are derived based on the well known LMS (least mean square). A number of simulated case studies are conducted to illustrate the efficiency of the claimed insight and design procedure.
A Clustering Algorithm for Wireless Sensor Networks Basing on Distance and Distribution
Authors: Liao Ying , Hao Wei Xu
Published: April 2011

Wireless sensor networks (WSNs) detect and monitor the outside physical state by the sensor nodes organizing automatically. Utilizing clustering algorithm to form hierarchical network topology is the common method which implements managing network and aggregating data in WSNs. Different from the previous clustering algorithms, this article proposes a clustering algorithm for WSNs based on distance and distribution to generate clusters considering residual energy of nods in WSNs with inhomogeneous distribution. The simulation result indicates that the algorithm can establish more balanceable clustering structure effectively and enhance the network life cycle obviously.
Synthesis, Properties and Application in Optical Memory of a New Photochromic Diarylethene
Authors: Liu Ming , Li Wei , Pu Shou Zhi , Liu Gang , Cui Shi Qiang
Published: April 2011

A new photochromic diarylethene compound, 1-[2-methyl-3-benzothiophene]-2- [5-(3-chlorobenzene)-2-methyl-3-thienyl]perfluorocyclopentene(1a), was synthesized and its photochromism and photo-induced anisotropy was investigated. It showed good photochromism and functioned as an effective fluorescent photoswitch in solution. In hexane, the open-ring isomer of the diarylethene 1a exhibited relatively strong fluorescence at 417 nm when excited at 315 nm. In PMMA film, diarylethene 1a also showed good photochromism.
A Computer Model of Bus-Waiting Problem
Authors: Wu Shao Gui , Wang Jia Yang
Published: April 2011

This paper investigates a bus waiting problem quantitatively by building a mathematical model. The problem is when a passenger is between two stations, which station to choose is favorable for him to catch a bus? Here, several related factors are discussed to explore their influences on the bus-waiting problem, including the original bus position, the average velocity of bus, the length between two bus stations, passenger’s position and his velocity. Finally, some important conclusions are drawn.
Advanced Treatment of Stabilized Leachate by Sodium Hypochlorite Composite Chemicals
Authors: Zhang Hai Ying , Hu Hong Tao , Zheng Yi , Chen Dong Hui
Published: April 2011

In this work, advanced treatment of leachate after biological treatment was performed using sodium hypochlorite solution (NaClO) + ferric chloride (FeCl3) + polyacrylamide (PAM) and NaClO + aluminum poly-chloride (PAC) + PAM, respectively, to determine the optimal condition for removal of COD and color. It was found that the optimal condition was: PAM 5 mg/L, FeCl3 420 mg/L, NaClO 6 mL/L, reaction time 15 min for treatment using FeCl3 + NaClO + PAM, and PAM 5 mg/L, PAC 800 mg/L, NaClO 6 mL/L, reaction time 15 min for PAC + NaClO + PAM. After being treated at the optimal conditions, the effluent quality met requirements of the tertiary grade described in “Integrated wastewater discharge standard”.
Integrated Method of Enhancing Image Quality for FPD-Based Cone-Beam Computed Tomography
Authors: Huang K.D. , Zhang Ding Hua , Zha Fang Long , Li M.J.
Published: April 2011

The main factors of impacting Cone-Beam Computed Tomography (CBCT) image quality and their causes were studied, and an integrated method of enhancing CBCT image quality was proposed according to the Digital Radiography (DR) imaging model. First, the original polychromatic X-ray was filtered into quasi-monochromatic X-ray by the filter plate of copper-tungsten alloy, in order to improve the quality of the original projection images. Then, the integrated artifact corrections for projection images were processed on the order of dark field correction, gain non-uniformity correction, scatter correction and beam hardening correction, to avoid the one-sidedness of only correcting a certain kind of artifact. Experimental results show that the method can almost eliminate the main artifacts of CBCT system and improve image clarity and signal to noise ratio.
Simulation of Tree Motion Based on Vega Prime
Authors: Li Zhan Li , Zhang Min
Published: April 2011

Due to the high level complexity of the structure of trees, physical-based simulation of tree’s motion is a difficult task. Many visual simulation platforms and modeling tools are developed to simplify the process of simulation. In a variety of modeling tools, Creator is a simple and convenient modeling tool. It works with the visual simulation platform Vega Prime. They play an important role in the field of visualized simulation. Thus, a solution for simulating tree’s motion in the environment of Creator and Vega Prime is proposed. Each of branches around the tree’s 3D shape is built in Creator, and then is gradually merged together into a tree in Vega Prime. The Vega Prime APIs are used to realize the simulation of tree’s motion. The software development circle is shortened in the solution. The simulation of tree’s motion is accomplished faithfully. Experiment results show that the solution reduces the process of development and realizes the vivid simulation.
Developing Environmental Quality Evaluation Indexes for Mountain and Lake Tourism Attractions in Xinjiang
Authors: Sun Hao Jie , Chen Xue Gang
Published: April 2011

Xinjiang is rich in mountain and lake tourist resources; however, they are complex and vulnerable. In line with the features of mountain and lake tourist attractions in Xinjiang and based on ecology theory, environment theory, tourism theory, sustainable development theory, this text chooses the evaluation indicators and develops a universal environmental quality comprehensive evaluation index for mountain and lake tourist attractions, aiming to propose solutions for the existing problems and then improve it.
An Optimal Inventory Model Based on the Effect of Time-Limited Free Back-Orders
Authors: Zhang Biao , Zhang Di
Published: April 2011

An optimal inventory model is proposed in this paper. Firstly, the prerequisite of this model is given out. Under the supposed condition of deterioration, the demand rate of articles depends on the inventory level, meanwhile the status of shortage and partial back-order. The optimal inventory model of fixed free back orders is on this basis. With those numerical values in this model, the optimal ordering cycle and ordering batch of stock system are counted out and the sensitivity is analyzed by using the mathematical software Mathmatica 7.0.
A Level-Set Based Method for Vessel Navigation
Authors: Lv Xin Rong
Published: April 2011

Automatic blood vessel analysis plays an important role in computer-aided diagnosis of the vessels. In the blood vessel analysis system, extraction and navigation of vessels are two crucial components, and fast extraction and automatic navigation algorithms attract more and more attention. In this paper, to accelerate the extraction of blood vessel, an initial contour algorithm is proposed to produce an initial contour for level-set method. Then, the level-set method is introduced to extract the vessel more precisely. Finally, the navigation of the extracted blood vessel is realized based on a 3D texture volume rendering algorithm based on graphics processing unit (GPU). The experimental results illustrate the effectiveness of the proposed vessel extraction and navigation scheme.
New Constructions of Hierarchical Identity-Based Signature in the Standard Model
Authors: Wu Qing , Sun Su Xia
Published: April 2011

In this paper, a new construct of hierarchical identity-based signature(HIBS) scheme is proposed at first. It has many advantages over those available, such as fully secure without using random oracles, efficient signing algorithm. Additionally, it is provably secure under the computational Diffie-Hellman(CDH) assumption. This assumption is more natural than many of the hardness assumptions recently introduced to HIBS in the standard model. However, the length of its private key and signature increases as the hierarchy depth expands. Then a modified scheme is presented. The signature of modified scheme consists of three group elements and the private keys size shrinks as the identity depth increases. Under the h-CDH assumption, it is provable security in full security model without using random oracles.
Forecasting the Hebei Province Model of Foreign Trade of the Eco-Environment Based on GA-BP Neural Network
Authors: Zhao Jian Na , Lu Shan Ying
Published: April 2011

Along with our country foreign trade considerable development and international competitiveness increasing enhancement, the environment question is prominent actually day by day. The paper selected the data of the foreign trade and industrial waste discharge from 1998 to 2009 to establish the Hebei Province prediction model. It shows that GA-BP neural network had higher accuracy, tolerant and excellent generalization ability about ecology environment. It provides a guidance to forecast foreign trade environment.
First Principle Study on Hydrogen Diffusion in Degassing
Authors: Liu Yan , Sun Bao De , Dai Yong Bing , Wang Jun
Published: April 2011

The effects of chlorine on improving hydrogen diffusion have been studied by first principle calculations and we obtain the diffusivity of hydrogen in liquid aluminum which is in agreement with the experimental data. It can be concluded that the diffusion of hydrogen in aluminum melts can be enhanced in the presence of chlorine and mobility of aluminum is depressed by forming alumina layer which can impede the diffusion of hydrogen.
Research on Passive Location Based on the Least Square Estimation Method
Authors: Li Ting Jun , Han Jian Li , Liu Zhi Yong , Zhang Ya Zhou , Ren Jian Cun
Published: April 2011

Passive location system does not radiate electromagnetic wave, so it can work passively and conceal itself very well. Main factors interfering location precision are: measure errors of time difference, measure errors of three satellites, height errors of targets location on earth, geometry form of satellites cluster and orbit height of satellites cluster; The Least-square estimation method is presented, at the same time in the process of algorithm iteration the target height can be inquired in the geography information system and be corrected continuously, and the localization error is analyzed and simulated, the result indicates that the corrected height error can improve the height precision, then improve the level precision, The integral localization precision can be improved.
Mechanical Analysis of Restored-Tooth Structure Due to Polymerization Shrinkage of Composite Restoration
Authors: Zhu Shui Wen , Fan Jian Ping , Chen Guo Ping
Published: April 2011

The finite element analysis is presented in this paper in order to investigate the influence of interphase properties on restored-tooth structure due to polymerization shrinkage of resin-based composite. The restoration-tooth interface is simulated using plane elements of varying material properties and thicknesses. The stress and displacement within restored-tooth structure built-up from the polymerization shrinkage of the restorative composite were computed accounting for the time-dependent, visco-elastic behaviour of the composite. It was found that a correlation exists between material and geometry properties at the restoration-tooth interface and higher shrinkage stresses on interphase due to polymerization shrinkage. The development trend of residual stress from polymerization shrinkage in the restored-tooth structure was discussed and forecasted.
Vibration Analysis of Rotor System by Combined Adaptive Time-Frequency Analysis and Independent Component Analysis
Authors: Li Bin , Guo Yu , Ding Yan Chun , Liu Ting Wei , Na Jing , Gao Yan
Published: April 2011

Traditional time-frequency analysis methods such as short-time Fourier transform (STFT) and Wigner-Ville distribution (WVD) cannot always work effectively for the complex rotor systems where the multiple faults are involved. A noise cancellation method for the rotor faults detection is proposed in this paper by combining the independent component analysis (ICA) scheme and the adaptive time-frequency analysis (ATFA) approach. In the proposed method, the raw picked data are first separated into different independent components (ICs) via the ICA according to the different vibration sources. Then the ICs are processed by the ATFA to obtain a clear vibration character for the fault diagnosis. Experiments on a rotor system with hybrid fault of the rotor imbalance and the bolt looseness are introduced to verify the feasibility and validity of the proposed scheme.
Semi-Active Control of Vehicle Suspensions with MRF Damper Based on Robust Control Theory
Authors: Liu Yun , Jiang Wei , Jing Zhi Sheng , Zhang Rui Ping , Liu Zhong Min
Published: April 2011

Magnetorheological fluid damper, coil current changes the magnetic field by adjusting the magnetic fluid flow in the damping channel, to achieve the shock absorber damping force control. Magnetorheological fluid damper based vehicle semi-active suspension control, with two degrees of freedom 1 / 2 Body Model controller model. By the control algorithm, derived optimal control law to determine the semi-active damper drive control.
Towards Subjective Consistency: An Effective Objective Quality Assessment Algorithm for Binary Image
Authors: Zhang Chun E , Guo Fan Ci , Xiong Ke
Published: April 2011

Image quality assessment plays an important role in various image processing applications. One of the challenges to objectively assess image quality is how to design an effective scheme to achieve high consistency with the classic subjective image assessment criterion, Mean Opinion Score (MOS). This work presents a novel objective assessment algorithm for binary images by considering three factors which have great influences on visual quality of binary images, i.e., structural change caused by noise point, isolated noise points, and gathering noise points. Experimental results show that our algorithm can achieve effective objective assessment results with higher consistency with the MOS criterion.
Analyzing Manufacturer’s R&D Equilibrium in Defense Procurement
Authors: Chen Sheng Li , Liu Xiao Dong
Published: April 2011

We formulate the model of R&D investment scale adjustment of defense procurement by applying game theory and contest theory and study the equilibrium of manufacturers’ R&D investment decision-making in defense procurement. We explore mainly the influence of valuation of monopolistic contract and differences among manufacturers’ abilities on investment. The conclusion shows that manufacturers’ investment equilibrium of R&D projects is what the government expects under certain conditions, however, manufacturers’ abilities effect on the investment equilibrium and makes it deviate from the government expectation. Therefore, the government must keep practically manufacturers’ anticipation about the monopolistic contact being consistent with government’s and set basic admission criterion to enable manufactures’ ability well-matched to induce the manufacturers’ investment decisions to the investment equilibrium that it desired.
The Study on AD HOC Networks Security Solution
Authors: Li Rong Guo
Published: April 2011

In this paper, we elaborated on preventive mechanisms either based on cryptographic solutions or trust based infrastructure Moreover, both the localized and ACK-based detection techniques were discussed. Global and local end node reaction mechanisms against ongoing intrusions and threads in order to avoid persistent adverse effects were further discussed. Finally, this paper highlighted open challenges which need to be addressed to secure Ad Hoc networks of the future.
A Relational Database Complexity Computing Model
Authors: Lin Xue Yun
Published: April 2011

In this paper we have proposed a model to compute the complexity of small relational database application developed in MS Access. The model was built using different database objects. These objects were categorized based upon the basis of weights assigned to their complexity determining factors. We have implemented our model in a tool called SMARtS. We used our model to compute complexity of eight database projects. To evaluate our model, we analyzed the calculated complexity and actual effort. We found that our model successfully captured the complexity of different database projects. Correlation analysis has shown that complexities computed by SMARtS and the actual efforts are strongly correlated.
Web Personalization for Chinese Travel Websites
Authors: Pi Shih Ming
Published: April 2011

In this study, we proposed a conceptual architecture of web personalization based on subject taxonomy tree and click-through analyses in order to improve the browsing efficiency and user satisfaction. In order to construct user profile, a hierarchal subject taxonomy tree of travel information was built. This tree has five attributes which represent the interests of a single user. Each user has his profile for generating personal categories while searching. The system then adjusts user profiles according to each user’s browsing behavior in order to learn different interests of each user. Textual data in Chinese travel web sites are used for experimental data and a prototype system is implemented in order to evaluate the proposed architecture. The result shows that personal classification is able to improve the outcome of browsing efficiency and user satisfaction on web search.
A Novel Encryption Scheme for Digital Images Based on Compound Chaos Algorithm
Authors: Han Feng Ying , Zhu Cong Xu , Liu Chang Sheng
Published: April 2011

A compound Chaos encryption algorithm for digital images is designed in this paper. Lorenz Chaotic system and Logistics map are linked in cascade to generate Chaos sequences. Then the permutation matrix is constructed to encrypt the digital image. The new algorithm can expand the key space and improve anti-aggressive ability. Matlab7.0 is used for simulation testing of the image encryption. Experimental results show that the algorithm is feasible and it can satisfy the security requirement for image transmission and storage. The compound Chaos algorithm can be also used for color digital image encryption.
Switch Architecture with Wavelength Conversion in Optical Networks
Authors: Zhang Ning
Published: April 2011

In this paper, we analyze the optical network with wavelength conversion, and discuss the architecture of network with wavelength converter in its node. The optical cross connects technology for wavelength division multiplexing (WDM) is rapidly developing. Wavelength conversion is one of the key techniques for switch WDM optical networks. The wavelength conversion technology can achieve wavelength reuse, decrease wavelength competition, enhance network flexibility and scalability, and simplify network structure and management. The results show that If these cross-connectors feature integrated with wavelength conversion, network will be better able to play the full potential of WDM optical networks.
Efficient Synthesis and Properties of a Photochromic Diarylethene Bearing an Isoxazole Moiety
Authors: Liu Hong Liang , Pu Shou Zhi , Cui Shi Qiang , Liu Wei Jun
Published: April 2011

A novel photochromic diarylethene based on isoxazole moiety was synthesized and its photochromic and fluorescent properties were also investigated. The compounds exhibited remarkable photochromism, changing from colorless to red after irradiation with UV light both in solution and in PMMA film. The fluorescence had a remarkable initial increase with subsequent dramatic decrease with increasing concentration. The results indicated that the isoxazole moiety played a very important role during the process of photochromic reaction for the diarylethene derivative.
Improved Model for Strategic-Loading-Station Location Problem under Incomplete Information
Authors: Ren Qi Liang , Li Ming Ming , Li Qing , Chen Jin Shan , Li Bo
Published: April 2011

In order to realize scientific planning the layout of strategic loading station, the strategic-loading –station location problem was proposed, which is related to determine the location of each stay with station and the transportation plan on the precise of satisfying the general location constraints and problem related special constraints. Based on theory of capacitated facility location with multiple souring in two stage supply chain, one mixed integer linear programming model was established which took whole logistic cost embedding transportation and location costs as objective. When confronted with small and medium size problem, this model could be exactly solved by optimization software using branch and bound algorithm, and when the problem size was big, this model could be heuristically solved by genetic algorithm which used 0-1 and priority-based combined encoding method to represent solution, cost-based and random-generated combined method to generate initial solution, solution repaired strategy and penalty method and special fitness function to deal illegal individual, and greedy based method to heuristically solve transshipment problem. At last, according to computational tests on randomly generated data demonstrated the practical feasibility of this method.
Photochromic Fluorescence Switching Diarylethene Flanking a Methoxy Group
Authors: Fan Cong Bin , Pu Shou Zhi , Liu Wei Jun
Published: April 2011

Fluorescent photoswitching molecule in which photochromic diarylethene with six-number phenyl unit and thiophene ring attached a phenyl methoxy group was synthesized. The compound exhibited pronounced photochromic and synchronous fluorescence switching properties. Irradiation of the open form of compound with UV light resulted in immediate photocyclization to the blue closed form with nonfluorescence; the colorless open form with fluorescence character could be regenerated by irradiation with visible light. In terms of potential use for optical storage and readout, this compound displays fluorescence discrimination between its open and closed form. This fluorescence switching could be the basis of a remote control nondestructive readout method.
Research on Some Aromatic Schiff Base Compounds and Metal Complexes with Different Substituted Groups
Authors: Jiao Ti Feng , Liu Jian , Gao Li Hua , Zhou Jing Xin , Xing Yuan Yuan
Published: April 2011

Two aromatic Schiff base derivatives and the corresponding metal complexes with different substituted groups were synthesized and characterized by many methods. The products were characterized by UV-Vis spectra, FT-IR spectra and thermal analysis, while the thermal stability was measured by TG-DTA instrument. FT-IR analysis indicated that the nitrogen atom in imino group and oxygen atom in phenolic hydroxyl group participated in coordinating with transition metal ion in different bridged mode. UV spectra also verified that different coordination modes can be performed between metal ions and ligands. In addition, the thermal stability of metal complexes had been obviously superior to that of the ligands. All results give a useful clue to obtain Schiff base derivatives with versatile property by regulating intramolecular substituted group and species of metal ion. The present results have showed potential application in fields of functional material and catalyst.
Modeling and Simulation of a planar precision positioning tables
Authors: Zhang Yi , Sun Hui Zhi , Zhou Hong
Published: April 2011

This paper introduces the structure and basic principle of planar precision positioning tables. “The same plane” mode and magnetic driver are adopted, on the basis of analytical field, the main design parameters, such as magnet length, coil current and air gap length are defined, and the response simulation is finished. The result shows that this project can meet the request of rigid orientation.
The Material Selection in Green Design
Authors: He Can Qun , Ji Bo
Published: April 2011

Green design is now a major trend in product design. The paper first discusses the importance of green design, then it tells the vital role that materials play in product design. Finally, it generalizes the concept of Green Material according to the requirements of green design. At the same time, the paper puts forward the principles that the material selection should live up to in green design so as to meet variety functional and environmental demands.
Synthesis and Properties of an Unsymmetrical Diarylethene Bearing a Chlorine Atom
Authors: Wang Li Qin , Pu Shou Zhi , Yan Liu Shui , Liu Wei Jun
Published: April 2011

A new unsymmetrical photochromic diarylethene 1-(2-methyl-benzothiophenyl)- 2-(2-methyl-5-(4-chlorophenyl))perfluoroncyclopentene (1a), was synthesized and its optoelectronic properties, such as photochromism in solution as well as in poly-methylmethacrylate (PMMA) amorphous films and fluorescences were investigated. The photochromic reaction kinetics indicated that the cyclization process of 1a belongs to the zeroth order reaction and the cycloreversion process belongs to the first order reaction. Using diarylethene 1/PMMA film as recording medium and a linearly polarized 633 nm laser diode for recording and readout, polarization multiplexed image recording can be carried out in this film, which illustrated that the diarylethene can be potentially used as holographic optical recording medium.
Synthesis and Property of a Novel Diarylethene Based on Benzofuran and Thienyl Units for Polarization Optical Recording
Authors: Wang Tao Feng , Pu Shou Zhi , Cui Shi Qiang
Published: April 2011

A new photochromic diarylethene of bis(3-methyl-2-thienyl)ethene and bis(2-methyl-3- benzofuran)ethene was synthesized. Its photochromic, fluorescent and optical strorage properties were investigated. The compounds exhibited remarkable photochromism both in solution and in PMMA film. In hexane, the open-ring isomer of the diarylethene 1 exhibited relatively strong and clear fluorescent switches when excited at 270 nm. The fluorescence intensity declined along with the photochromism upon irradiation with 297 nm light. The results showed that the cyclization/cycloreversion process of the compound was determined to be the zeroth/first order reaction. This new photochromic system also exhibited remarkable optical storage character.
Synthesis and Properties of a New Diarylethene Derivative
Authors: Yan Pei Jian , Jiang Duo Hua , Pu Shou Zhi , Liu Wei Jun
Published: April 2011

A novel photochromic diarylethene, 1-(2-ethyl-3-benzothiophenyl)-2-(2-methyl-5- (3-methoxyphenyl)-3-thienyl)perfluorocyclopentene (1o) was synthesized, and its photochromic and fluorescent properties were investigated. This compound exhibited reversible photochromism, changing from colorless to purple after irradiation with UV light both in solution and in PMMA amorphous film. Also, it exhibited good fluorescence switching in solution. Fatigue-resistant experiments showed that this compound had attractive properties for rewritable optical recording or photoswitches.
Synthesis and Property of a New 2,4-Position Hybrid Diarylethene Bearing both Benzene and Isoxazole Moieties
Authors: Li Hui , Pu Shou Zhi , Liu Gang , Liu Wei Jun
Published: April 2011

A new photochromic diarylethene of bis(4-isoxazolyl)ethene and bis(2-phenyl)ethene was synthesized. Its properties, including photochromism and fluorescence were investigated in detail. It underwent reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light in hexane. The results showed that this compound exhibited reversible photochromism and good fluorescent switching in solution after irradiation with UV light and visible light. Using this dithienylethene 1c as optical storage recording was performed successfully.
Synthesis and Photochromism of a Novel Diarylethene in PMMA Amorphous Film and in Hexane Solution
Authors: Zheng Chun Hong , Pu Shou Zhi , Liu Gang , Liu Wei Jun
Published: April 2011

A new green photochromic diarylethene compound, 1,2-bis[2-n-hexyl-5- (2,2-dicyanovinyl)-3-thienyl]-perfluorocyclopentene (1o), was synthesized and its photochemical properties were investigated in detail. The measurement results demonstrated that the compound has good photochromism in solution and in PMMA amorphous film. Upon irradiation with 365 nm light, the colorless of the hexane solution and the PMMA film turned colored and under the visible light irradiation (λ > 510 nm) the colored hexane solution and the colored PMMA film return to colorless.
Influence of Conversion Deviation on Dynamic Performance of High-Speed Railway Turnout
Authors: Chen Rong , Ping Wang , Wei Xian Kui
Published: April 2011

Railway turnout, an integrated mechatronics equipment of track technology, is one of key equipments that control the running speed of high-speed railway. During the conversion of turnout, the friction, inclusion of foreign matter and deficient displacement of conversion caused by its own structural characteristics may lead to severe wheel/rail impact. In order to study the influence of conversion deviation on safety and comfort of a train during passing the turnout, train/turnout dynamic model was applied. Taking No.18 turnout on a Passenger Dedicated Line (PDL) with 350km/h as a case study, when the train passed it, the influences of its deficient displacement and inclusion of foreign matter on the following dynamic responses were studied, i.e. wheel load distribution, wheel flange force, dynamic stress of rail, wheel unloading rate, derailment coefficient, as well as the lateral displacements of switch rail and nose rail, etc. Result shows that: (1) the deficient displacement and the inclusion of foreign matter will severely influence the normal operation of the turnout, so the safety and comfort during the train passing through turnout may be affected; (2) During the conversion of turnout, its deficient displacement should be controlled properly, and the foreign matter should be removed during routine maintenance, moreover, a reliable detection system should be set.
Wear and Mechanical Properties of Short Carbon Fiber Reinforced Copper Matrix Composites
Authors: Yang Lian Wei , Dong Yun , Wang Rui Jie
Published: April 2011

The mechanical properties and wear behavior of short carbon fiber reinforced copper matrix composites was studied. In order to avoid any interfacial pronlems in the carbon fibre reinforced composites, the carbon fibers were coated with copper. The fibers were coated by electroless coating method and then characterized. Composites containing different amounts of carbon fibers were prepared by hot pressing technique. The results show that Carbon fiber/Cu–Ni–Fe composites showed higher hardness, higher wear resistance and bending strength than the common copper alloy when carbon fibers content is less than 15 vol.%. The predominant wear mechanisms were identified as adhesive wear in the alloy and adhesive wear accompanied with oxidative wear in the 12 vol.% carbon fiber/Cu–Ni–Fe composites.