bluuebunny/crossref_metadata_2025 huggingface dataset:
Oxidation of Nb/Nb5Si3 In Situ Composites Fabricated via Spark Plasma Sintering with Al Addition
Authors: Long Wen Yuan , Zou Xiang Yan , Wang Wei Dong , Yao Jun Ping
Published: August 2013

Dense Nb/Nb5Si3composites were fabricated via spark plasma sintering technology using Nb, Si, and Al elemental powders as raw materials. The microstructures of the synthesised composites were analysed through scanning electron microscopy, X-ray diffraction, and electron probe microanalysis. The results show that the composites consisted of residual Nb particle phase and Nb5Si3phase. The microstructure of the Nb/ Nb5Si3in situ composites was evidently affected by Al addition, which prompted the formation of the Al3Nb10Si3phase. The oxidation resistance of the Nb/Nb5Si3in situ composites significantly improved with the increase in Al addition. Pesting oxidation behaviour was exhibited at 800°C by the Nb-20Si composites when exposed to air for 4h. This pest oxidation behaviour is not exhibited by the Nb-20Si-10Al and Nb-20Si-15Al composites after exposure to air for ~10h. The composite exhibits the best oxidation resistance at 15at% Al.
Comparative Study on Luminescent Properties of LiLa2BO5:Tb3+ Phosphors Synthesized with Different Methods
Authors: Fu Yin Rong
Published: August 2013

A novel green-emitting phosphors Tb3+-doped LiLa2BO5 phosphor was synthesized by different methods: the solid-state reaction method and solgel method. The green phosphor was characterized by XRD. The green phosphor has a dominant excitation peak located at 280nm. The emission intensity was enhanced by Tb3+ doped ion, and decreased due to concentration quenching. Under the excitation wavelength of 280 nm, the relative intensity of the solgel derived phosphor is about 81% of solid-state reaction derived phosphor. The intense green emission of LiLa2BO5 under 280nm excitation suggests that Tb3+ -doped LiLa2BO5 phosphor is a potential green phosphor for near-UV LEDs.
The Influence of the Solvent on the Shape of the Titanium Dioxide Crystals during the Solvothermal Autoclave Synthesis
Authors: Karpovich Natalia Fedorovna , Pugachevskij Maxim Alexandrovich , Shtarev Dmitry Sergeevich
Published: August 2013

By the solvothermal synthesis the TiO2nanocrystals with different shapes were obtained. It was found that the morphology of TiO2nanoparticles determines the type of solvent and their crystallinity, and the size depends on the temperature and time of synthesis. The conditions are defined, under which the anatase nanocrystals are formed in the form of spherical particles with a diameter of 10-15 nm, cubic particles with a size of 50-70 nm and edges of nanowires with a diameter of 50-100 nm and a length of more than 100 microns.
Structure and Properties of Bisphenol a Polycarbonate Exposed to Ultraviolet
Authors: Ge Yong , Wang Tao , Yan Yue , Li Lei
Published: August 2013

In this study, the structure and properties of bisphenol A polycarbonate (BPA-PC) after UVB-313 radiation were investigated. When BPA-PC was exposed to ultraviolet (UV), this polymer showed two different degradation mechanisms: photo-Fries rearrangement and photo-oxidation. The interpretation of the observed chemical degradation was based on attenuated total reflection IR (ATR). Gel permeation chromatograph (GPC) measurements indicated that the molecular weights of exposed surface sample were decreased with increasing of irradiation time, but the molecular weights of bulk polymer did not decrease severely. Namely, the degradation of BPA-PC was a surface phenomenon, which only extended about several micrometers into the exposed surface. This also could explain why the mechanical properties of samples showed no change. In addition, photo-induced yellowing of the aged PC was aggravated with the irradiation time prolonging, but no remarkable changes of light transmission have been observed.
Thermal Properties of PVA-Fiber Reinforced Cement Composites at High Temperatures
Authors: Vejmelková Eva , Černý Robert
Published: August 2013

Properties of polyvinyl alcohol-fiber reinforced cement composites are investigated as functions of temperature up to 1000 °C. Basic physical properties are measured using the water vacuum saturation method. High-temperature thermal diffusivity is determined by a transient method based on the analysis of temperature field at one-sided sample heating. High-temperature specific heat capacity is obtained using a non-adiabatic method. Experimental results show that the studied material exhibits a satisfactory resistance to high-temperature exposure and has a potential for using in high-temperature applications in building industry.
Performance of High-Efficiency Liquid Cement Setting Accelerator with Alkali-Free and its Acceleration Mechanism
Authors: Wang Yan , Wang Jun , Qiu Shu Heng , Gao Fei , Gu Rui
Published: August 2013

A kind of non-alkali high efficiency liquid cement setting accelerator named ZJ-NSA was developed by regulating the chemical composition of polymerized aluminum sulfate in this paper. The results show that the initial setting time and the final setting time are sharply shortened to 2 minutes 48 seconds and 4 minutes 37 seconds respectively, and the 1 d-aged compressive strength reach to 8.6MPa when it is mixed into P.O42.5 Portland cement with 5% addition; meanwhile, its compressive strength and bending strength retention at the age of 1d and 28d reach to 79.63%, 81.89% and 78.13%, 97.89% respectively. Phase characteristics on the hydrated cement specimens by means of x-ray diffraction (XRD) and differential scanning calorimeter (DSC) were analyzed and the acceleration mechanism was discussed.
Effect of Machinability of Stainless Steels for Increasing of Productivity Production
Authors: Jurko Jozef , Panda Anton , Behún Marcel , Gecák Ján
Published: August 2013

The foundation of the cutting process rests in the full plastic deformation of the separated material (in the form of chips) at TW, for defined conditions and a defined technological M-F system. Currently, one of the expense items influencing production costs for 1 component piece is: cost of the cutting tool. Every company includes a different percentage of cost of the cutting tool for their total costs of producing one component piece. Although the cost of the cutting tool makes up only part of the total cost for producing one component piece (5 % to 10 %), they have a significant impact particularly on the following: cutting process (TW), machine stand time, number of required operations, period for which the components must stay within the company, number of cutting tools.
Dynamic Analysis of 2.5D C/C Composites Finger Seal
Authors: Lu Fei , Chen Guo Ding , Liu Jian
Published: August 2013

For the finger seal, leakage and wear are key factors to affect its sealing performance and service life. To reduce the wear of the finger seal, C/C composites are probably used for finger seal material preparation for its self-lubrication and light weight properties compared with the metal. The work to be presented here assessed the elastic properties of the 2.5D C/C composites by the volume average method and established a finite element model for finger seal dynamic analysis. The results show that increasing warp yarn density and using shallow direct-joint structure can notably improve sealing performance of the finger seal, but can also increase contact pressure between the finger seal and the rotor.
Constitutive and Processing Map Analyses of Stainless Steel 316 under Hot Compression
Authors: Chiu Chui Hung , Wu Horng Yu , Wu Cheng Tao
Published: August 2013

Hot deformation characteristics of stainless steel 316 were investigated at elevated temperatures. Hot compressive tests were carried out in the temperature and strain rate ranges from 800 to 1100 °C and 0.001 to 1 s1, respectively. The flow behaviors showed that the softening mechanisms were related to the dynamic recovery (DRV) and dynamic recrystallization (DRX). The constitutive equation relating flow stress, temperature, and strain rate was obtained based on the peak stress. Constitutive equation was constructed according to the hyperbolic sine constitutive law. The flow stress of stainless steel 316 was fitted well by the constitutive equation of the hyperbolic sine function. The constitutive analysis suggested that the hot deformation mechanism of the stainless steel was dislocation creep. The processing map obtained at a strain of 0.5 exhibited two domains with local maximum efficiency of power dissipation. Variation in efficiency of power dissipation was associated with the variation in ZenerHollomon parameter (Z).
Fatigue Strength of Al Cast Alloy in Bio-Diesel Fuel
Authors: Nu Yan , Hayashi Kosuke , Kinoshita Eiji , Kawagoishi N.
Published: August 2013

In order to investigate the effect of bio-diesel fuel (BDF) on fatigue strength of a squeeze cast Al alloy, AC4CH-T6, rotating bending fatigue tests were carried out using plain specimens in BDF made by rapeseed oil. The results were compared with those in turbine oil and in ambient air. Fatigue life was longer in turbine oil and shorter in BDF than that in ambient air. Fatigue life in each environment tested was mainly occupied by the growth life of a crack smaller than 1mm, meaning that the difference in fatigue strength affected by environment was mainly yielded in the growth process of a small crack. The crack growth rates were suppressed in turbine oil and accelerated in BDF in comparison with those in air. BDF contained much water dissolved from air in the early stage of fatigue process. The suppression of crack growth was caused by wedging effect of oil and the acceleration was caused by corrosion due to dissolved water in BDF, which was larger than the suppression due to the wedging effect.
Investigation of Robust Combination Control for Elastic Vehicle Based on Reduced-Order Model
Authors: Zhang Zi Jian , Liu Bin
Published: August 2013

Putting forward with an integrated flight and aeroelasticity control method of elastic air vehicle and aiming at the reduction errors introduced during combination dynamic model reduction, the paper adopts mixed sensitivity H∞ control to design low-order combination control law that satisfies its robustness based on reduced-order model. Against to the wide reduced-order error bounds that may influence control performance, the two-circuit design method is used, and combined with inner-circuit suboptimal feedback design, error bounds of equivalent model are greatly narrowed. Without any orders extra added to the controllers, the outer-circuit robust controller designed on that basis will effectively improve the performance of the system, significantly superior to the single circuit design method. It is shown in simulation results that such low-order combination law will not only provide satisfactory robustness and performance, but will also effectively suppress the occurrence of servo flutter, while the greatly-reduced orders will be helpful for the realization of projects.
Advanced Treatment of Electroplating Wastewater by Nanofiltration Membrane Technology
Authors: Wang Ling , Xiong Xue Feng , Fan Zheng , Zhang Guo Liang , Wang Zhi Yang
Published: August 2013

The nanofiltration (NF) membrane technology presented in this paper were used to treat the industrial electroplating effluent for reutilization, which contained hazardous heavy metal ions such as chromium and zinc. Two different kinds of nanofiltration membranes were applied in pilot scale installation following the conventional wastewater treatment system. The effects of different operating parameters on their separation performance were investigated in detail. Results showed that both two NF membranes held large permeate flux under relatively low operating pressures. The rejection rates of the monovalent ions were less than 50%, while for divalent ions they were more than 90%, including SO42-, Ca2+, Cr3+ and Zn2+. Higher permeate flux, lower operating pressure and distinguished ion selectivity of nanofiltration membranes exhibited a big potential for industrial application concerning the investment and operation cost .
Probabilistic Assessment of Power-Producing Components
Authors: Marková Jana , Jung Karel
Published: August 2013

Assessment of existing components of power producing facilities is based on probabilistic methods of the theory of structural reliability. An example of quick-closing steel valves in a hydroelectric power plant indicates the assessment of reliability and prediction of the remaining working life of a structural component for the considered model of corrosion.
Casting Die Designing for Drive Cover
Authors: Wang Ao Bing , Zhang Li Ping , Peng Liu , Ni Li Yong
Published: August 2013

The driving covers casting with complex shape belongs to irregular casting. According to the requirements of size and performance of the thin-walled castings, the expanding-type runner of the trapezoid shape section was adopted, conducive to the production of thin-walled castings. The parting surfaces of the die-casting die are the interface of the movable die and fixed die and that of left and right slider. The left and right slider would be reset by spring. Proved by actual production, the mold operated smoothly, without clamping stagnation, and the production of die castings meet delivery requirements.
The Color Mixing White-Light LEDs
Authors: Yang Chiu Jung , Huang Chien Sheng , Chen Chih Wei , Chen Po Wen
Published: August 2013

Thepaperis discussedin coloruniformity study.The experiment divided into two steps in this study,first is modules design and simulation. Second is fabrication and measurement.After measure the LEDs property, calculating the ratio of each colored LEDs by using Grassmanns Law,modeling by Solidworks, and simulating the front study by optical software TracePro.Using four-color mixing with self-developed formula to avoid the present white light emitting diode patent, and the four-color grains are Red, Green, Blue and adding Y to modify the overall quality of the mixed light.The phosphorproduceSteabler-Wronsk hardly in the high temperatureas compared tofour-color mixing.Using four-color mixing to producehigher color rendering index than yellow phosphor.Series-parallel array of grain arrangement adopted to achieve the high demand for uniformity, while simplifying the design conditions by a certain current instead of the general mixed light-driven complex driver circuit,the completion of the mixing module using integrating sphere, light spectrum on the spectrophotometer, optical power, color coordinates values, such as mixing uniformity measurements.The chromaticity coordinates errors after complete results of the mixing module measurement and simulation can be controlled under (0.01x, 0.01y).
System Dynamics Modeling for China's EV Development Strategy
Authors: Wang Yu Ning , Zeng Hui Ming , Tang Bin Qing , Hu Bin Xiang
Published: August 2013

Due to mandatory emission reduction and rising oil prices electric vehicles are about to be introduced in mass markets. This paper presents a system dynamics model of Chinas development strategy of electric vehicle industry. The focus of the paper is to study the influence of four major dynamic factors government policies, technology innovation, market demand and competitive ability. It gives an overall scenario of the development and highlights the major problems faced by Chinese electric vehicles industry, and how SD modeling can be used for the analysis of the industry developing policy. The model has been used to simulate the influence of these dynamic factors for 20 years, and a serious of policy tests and some useful policy suggestions were put forward. The result suggested that government support will still play a key role in a long-term.
LDFS: Localized Depth First Search for Member Loss Detection of Moving Group in Wireless Networks
Authors: Chang Wei Li , Wu Eric Hsiaokuang , Sun Min Te , Chu Ching Hsiang
Published: August 2013

In a distributed system, a portion of nodes are more critical than others, and named them articulation points, all paths between certain nodes have to pass through these points. Most of previous works try to detect the articulation point problem in static networks such as wireless sensor networks, P2P networks. In dynamic networks, as group moving behavior, it is a challenge to detect articulation points because these nodes are moving with time. Group moving in this paper means that a group of mobile members move from one place to another place with different directions and speeds. We aim to propose a distributed LDFS algorithm to check the articulation points in dynamic networks, such as a moving group. The algorithm sets the number of hops for traversing and multiple initiators to reduce message overhead and improve the accuracy rate. In simulations, we design several schemes to compare message overhead, and correctness. Simulation results show that our scheme is better than GlobalDFS and CUD scheme. The scheme could be applied on different applications and is efficient helping us to save and alarm loss on group moving.
Research on Ergonomical Design of Hand-Operated Control Device Based on Force Feedback
Authors: Zhang Shuai , Wang Ning , Xiao Lin Zhen
Published: August 2013

In order to enhance virtual environment's reality and immersion,the force-feedback device was applied in the process of the hand-operated control device ergonomical design. The resistance of hand-operated control device was simulated. The characters of several different styles of hand-operated control device were analyzed by the paper. Force feedback models of three kinds of hand-operated control device were constructed. And a method of hand-operated control device ergonomical design based on force feedback was proposed which can improve the accuracy and inefficiency of ergonomical design.
Research and Application of Vibratory Stress Relief (II) - Realization of Data Acquisition of VSR Control System
Authors: Yang Cheng Hui
Published: August 2013

VB is the Visualization programming software, not only providing the various data type, accomplish the complicated data arithmetic , but also having powerful base function and holding striding platform exploitation. The system has adopted VB to develop Vibration Stress Relief (VSR) system, which has introduced the process of realizing data real time acquisition and database. After the data memory has carried out, the artwork drawing in the Vibration Stress Relief system has set, fuither more , scaling and zoom of drawing were realized in the system very well, which has improve the VSR control system better.
Effects of Creep Parameters of Lead-Free Solders on Fatigue Reliability of 3D IC Packages with through Silicon Vias
Authors: Kung Chieh
Published: August 2013

3D IC packaging technologies are emerging as they are able to respond to the demands for smaller form-factor, faster, high density interconnection at cheaper cost. Moreover, for a 3D IC package, through silicon vias (TSVs) provide high wiring density interconnection, thus improve electrical performance due to shorter interconnection from the chip to the substrate. However, TSV technology is still facing severe challenges as the physical design problems due to the existence of the copper vias remain resolved. Apart from thermal expansion mismatch, the problems are due in part to the nonlinear behavior of SAC lead-free solder used in the package as an echo of environmental concerns and RoHS directive. However, there exists a wide range of values of the parameters of the creep model used to describe the nonlinear behavior of SAC. The effects of the variations of these parameters on the thermal reliability of IC packages, particularly the 3D IC package with built-in TSVs considered herein, is of interest. Presented in the paper is a study on assessment of the influence of the creep parameters of SAC solders on the isothermal fatigue reliability of a 3D IC package with built-in TSVs. The results show that as the strain rate is linear proportional to C1, a larger C1 tends to enlarge the strain rate hence decrease the fatigue life. However, the relationship between the fatigue life of the specific IC package is not linear. Although the variation of C2 causes a large variation in the fatigue life, its effect becomes insignificant when a moderate value of C2 is considered. As a power parameter to the hyperbolic sine function of the creep model, C3 contributes a 40% variation to the fatigue life. Lastly, the fatigue life increases with C4 value, and the gain of fatigue life increases as C4 approaches the upper limit considered herein.
About Longitudinal Dynamics of Classical Passenger Trains during Braking Actions
Authors: Cruceanu Cătălin , Crăciun Camil Ion
Published: August 2013

There are presented and analyzed specific aspects regarding the main mechanic and pneumatic issues determining the in-train dynamic forces developed during braking actions. Particularities in case of passenger trains are highlighted, with the aim of proving that even in the case of short trains, fitted with UIC type P braking system, longitudinal dynamics can cause significant reactions whose effect cannot be neglected, both in terms of traffic safety and comfort. Numerical examples presented stand for this.
Constructing a Model of the Equivalent Wedge Oblique Cutting Edge
Authors: Filippov A.V.
Published: August 2013

The article presents a method for constructing a three-dimensional model of the equivalent wedge oblique cutting edge. This technique allows you to visually assess the complexity of changing the geometry of the tool and can be used in the design of cutting edge with a curved wedge. To construct a model, the equation of a space curve of cutting edge working part was derived. The article also shows the position of the tool-in-hand and the setting system in the developed model.
The Optimization Problem of the Ventilation System for Metallurgical Plant
Authors: Butenko Maria , Shafran Yury , Khoperskov Sergej , Kholodkov Vitalij , Khoperskov Alexander
Published: August 2013

Some of the ventilation problems in the large industrial premises based on direct numerical integration of unsteady three-dimensional hydrodynamics equations with the real geometrical parameters are investigated. The model takes into account the work of the different ventilation and aspiration devices and the availability of metallurgical furnaces as additional sources of heat and gaseous components. The possibility of air renewal between the room and surrounding atmosphere is foreseen. Optimal placement of the venting devices and their effective modes of operation can provide good sanitary conditions in work area.
Nonlinear Involution Application in Mining
Authors: Borovikov Ivan F. , Fisochenko Elena G.
Published: August 2013

Necessity of construction of multidimensional spaces hypersurfaces arises in solving of mining tasks connected with morphogenesis of complicated technical surfaces and multivariate processes modeling. In this work nonlinear involutions are proposed to be used for this aim. Such approach allows to obtain almost any hypersurface responding to given properties.
Differential Equations of Processes for the Hydropuls Power Mechanism of Drill Machines
Authors: Pashkov E.N. , Zijakaev G.R. , Tsigankova M.V.
Published: August 2013

The model of the hydropuls mechanism of drill machines is presented. The differential equations featuring mechanical and hydraulic processes for all cycle are given.
Research on Agricultural Products Quality Control Based on Computer Vision Information Technology
Authors: Zheng Huai Guo
Published: August 2013

In 2012, the ministry of agriculture released data showed that the import and export trade deficit of China's agricultural products had reached 49190000000 US dollars. China is a large agricultural country, agricultural crop occupies world front row, but export transactions accounted for the total trading lower percentage, the main reason is the quality testing technology that does not pass, detection technology is relatively backward, in this background, this paper puts forward a kind of advanced agricultural products quality control technology - computer visual information retrieval control technology. On the basis of the two-order upwind and linear interpolation theory, the use of image segmentation technology can successfully establish a computer vision inspection of agricultural products to mathematical model, and the establishment of the interpolation functions. Finally this paper is based on peanut detection as an example, the 50 cases of peanut quality are detected by using computer vision nondestructive technology testing, and the use of MATLAB software carries out mathematical statistics for its quality situation, the test results and the artificial inspection results are compared to verify the reliability of computer vision quality detection.
On-Demand Routing Algorithm Base on Energy Balancing in MANET
Authors: Chen Hui , Ju Yong Feng
Published: August 2013

A MANET is an autonomous infrastructureless network system of mobile hosts which are connected with each other via wireless links. The traditional routing protocol for wireless MANET is unable to achieve balanced energy consumption and could not adapt to the dynamic topology changes well. A novel on-demand algorithm is proposed based on energy balancing and LMST algorithm. The proposed algorithm excludes the unstable links in routing discovery, and allows the node with more energy forward the routing request packet preferentially. The simulation experiments demonstrate, comparing with the LMST algorithm, the algorithm increases the average life time, decreases the average transmission power, and achieves energy balancing in the network and prolong the life-span of the network, which shows the proposed algorithm is highly practical.
Remaining Useful Life Prediction Model Based on Gradient Feature Stochastic Filtering
Authors: Sun Lei , Li Gang , Li Gang
Published: August 2013

This paper proposed a remaining useful life prediction model to avoid the original monitoring information due to the influence of the oil monitoring linear regression process, thereby reducing the prediction error. According to the process of equipment wear, we analyzed the impact of the relationship between the wear, the metal particle concentration and the remaining useful life; then established an improved filter model. Using maximum likelihood parameter to estimate model parameters. Finally, taking a certain type of self-propelled Gun Engine Oil Spectrum Data for example, and the results show that the remaining useful life prediction model of equipment has a certain practical value.
Research on Clustering Algorithm for Wireless Sensor Networks
Authors: Feng Cheng Xu , Liu Zhong , Liu Zhi Kun
Published: August 2013

According to the problem that the sensor nodes are highly energy-constrained, a novel dynamic clustering algorithm for WSN, which is in application to object tracking, is proposed. The cluster head selection mechanism takes not only the distance between the cluster head and the sink node but also the received signal strength and the residual energy of nodes into consideration. The analysis result indicates that, the energy consumption of network communication is reduced and the cluster size is optimized. The simulation results show that the novel algorithm can efficiently prolong the lifetime of WSN, especially when the sink node is far from the network.
Study on the Influence IDs Model of the Structure and the Behavior Choice
Authors: Zhang Ya Ni
Published: August 2013

The complicated decision making problem is one of the important components for the study on the system of artificial intelligence area. This thesis, based on the Bayesian technology and decision-making theory, is going to optimize the traditional IDs model and improve the ability of expression of the model. and also by using the sum of individual utility function instead of the joint utility function to create the BP neural network to study the utility function structure of the IDs. The experimental result shows the method mentioned above is effective.
An Environmental Personalized Tag Recommendation Model
Authors: Wang Xiao , Zhang Chi , Zhang Peng Zhou
Published: August 2013

Social tagging has been widely used in Web2.0 applications. An optimized tagging recommendation model is showed in this article which can be divided into four layers. They are respectively based on essential data, character analysis, semantic data mining and user advanced behavior analysis. By using this model, flexible tag recommendation services can be provided to fit different application circumstances.
A Study of Representation of Spatiotemporal Data with Information Granules
Authors: Song Ming Li , Wang Yong Bin
Published: August 2013

Spatiotemporal data are widely visible in everyday life. This paper proposes an algorithm to represent them in a granular wayinformation granules. Information granules can be regarded as a collection of conceptual landmarks using which people can view the data and describe them in a semantic way. The key objective of this paper is to introduce a new granular way of data analysis through their granulation. Several experiments are done with synthetic data and the results show a clear way how our algorithm performs.
Research of Background Modeling Algorithm Method Based on Multi-Frame Average Method in Moving Target Detection
Authors: Hou Xiang Hua , Liu Hong Hai
Published: August 2013

In intelligent video surveillance system, there exists the defect that the background is multimodal when extracting the background image, so the extracted foreground objects are not very pure with the method of background subtraction. In this paper, we put forward an algorithm which adopts adaptive threshold to update the background. Firstly, the common background model algorithms and their defect are analysed. Then we propose the strategy of updating background template based on adaptive threshold and then give the specific algorithm steps. Finally, the algorithm is simulated and the results are analyzed.
A Two Factor Authentication Algorithm for Medical Registration Platform
Authors: Liu Di , Zhang Ni , Hu Kun
Published: August 2013

In order to protect user privacy information on the platform, this paper proposes a two factors authentication algorithm for medical registration platform. This algorithm make up gap that there is no authentication process during user log on the platform. This method is safer than traditional single factor user authentication methods, e.g., inputting password, or biometric authentication. For the proposed scheme, we figure out two different solutions, including SMS-OTP solution and biometrics based solution. Through comparisons at a different angle among these two solutions, a reasonable solution is chosen as the formal one to the platform.
An Improved Four Point Interpolatory Subdivision Scheme
Authors: Zhang Xin Fen , Liu Yu Zhen
Published: August 2013

In this paper we propose a new kind of geometry driven subdivision scheme for curve interpolation. We use cubic Lagrange interpolatory polynomial to construct a new point, selecting parameters by accumulated chord length method. The new scheme is shape preserving. It can overcome the shortcoming of the initial four point subdivision scheme proposed.
Extended Probabilistic Data Association Algorithm
Authors: Xu Wan Li , Liu Zhun , Liu Jun Hui
Published: August 2013

[Purpos In order to improve the accuracy of target tracking and reduce losing rate of target in the multiple target tracking, a new algorithm called Extended Probabilistic Data Association (EPDA) is presented in this paper. [Metho This paper defines joint association event based on the number of target and puts forward the EPDA for target tracking. [Result Experimental results show that this algorithm has higher accuracy of target tracking than the Probabilistic Data Association algorithm and costs much less time relative to the Joint Probabilistic Data Association algorithm. [Conclusion Consequently, EPDA is an effective algorithm to balance the accuracy and the losing rate in target tracking.
A New Method of Optimization Design of Hydraulic Fracture Parameters in Low Porosity and Fractured Gas Reservoir
Authors: Han Xiu Ling , Zhou Fu Jian , Xiong Chun Ming , Liu Xiong Fei , Yang Xian You
Published: August 2013

A new composite reservoir simulation model of lower computation cost was used to optimize hydraulic fracture length and fracture conductivity during performing a hydraulic fracturing. The simulation model is divided into inner part and outer part. The inner part is dual-porosity and dual-permeability system, and the other is single porosity system. The research shows that the natural fracture permeability and density are the most influential parameters; a relative long fracture with high hydraulic fracture conductivity is required for a high production rate due to non-Darcy flow effects. A shorter primary fracture is better in a gas reservoir of high natural density. The composite model represents the flow characteristic more accurately and provides the optimal design of fracturing treatments to obtain an economic gas production.
Electric Scissor Aerial Work Platform Solenoid Valve Research
Authors: Pan Guo Jun
Published: August 2013

Electric scissor aerial work platform generally uses hydraulic cylinder to lift. The decline solenoid valve is an important part of the entire hydraulic system, which usually installed in the bottom of the hydraulic cylinder. The main function is locking hydraulic cylinder to prevent the platform sinking due to its weight, protect workers safety. This paper first introduces its structure and working principle, and then does the experiments such as resistance pollutants, leakage, and a comprehensive analysis of the decline in the performance of the solenoid valve.
Research on Voyage Path Methods in Medical Visualization
Authors: Peng Yan Jun , Wang Yuan Hong
Published: August 2013

A new fast algorithm of voyage path in medical visualization based on distance transform is proposed, which is suitable for single branch and multi-branch objects. A section plane including the next center point is found out according to the location relationship among the present center point on center path, objects start point and end point. The distance from inner voxels to boundary surface is computed in section plane, not in 3D space. The voxel point with the local maximum distance value is taken as the next center point, whose distance value in section plane is larger than its neighbor voxels distance value. It is faster than other algorithms based on distance transform and the results using our algorithm on 2D space and 3D space are given out.
The Research of Optimization Algorithm of Dynamic Topology Optimization Model of Continuum Structure Based on the ICM Method
Authors: Zhang Yan Ming , Ye Hong Ling , Li Yao Ming , Sui Yun Kang
Published: August 2013

In this paper, we mainly focus on the structural optimal design of dynamics for continuum structures, and aim at constructing the topological optimal formulation by using the ICM (Independent, Continuum and Mapping) method, which is considering weight as objective function and fundamental eigenfrequency as constraint. The local model is removed by selecting suitable filter function. And two algorithms, dual sequential quadratic programming (DSQP) and global convergent method of moving asymptotes (GCMMA) algorithm, were used to solve the mathematic optimal model. Finally, numerical example is provided to demonstrate the validity and effectiveness of the ICM method and compare the optimization results of two optimization algorithms. The results show that both optimization algorithms can solve the mathematics optimization model effectively.
Strength Checking and Finite Element Analysis to Hoisting Pads for Launching on Horizontal Slipway
Authors: Huang Ya Nan , Liu Da Lu , Sun Feng Sheng , Wang Yu , Lu Dong
Published: August 2013

In this paper, with a 92,500 ton bulk-carrier being mainly taken as an example, the preparing design of launching processing scheme on the horizontal berth is discussed. Calculation of needed hulling force and strength examination of hoisting pad are done, and then the structural strength of hoisting pads and their stiffening structures are analyzed with the aid of finite element technique. Once the total assembly of hull is completed on the berth, the launching weight should be calculated and proper number of box-beams should be determined. Sliding frictional media used between box-beams and slipping-rails should be selected, and according to combined frictional coefficient, the needed pulling force by which the hull may be hoisted forward securely should be fixed. In order to assure the safety of ship in the period of launching, strength examination calculating for hoisting pads and stiffening members should be done by means of finite element method as soon as their types and assembling positions are determined, so that the strength of hoisting pads and stiffening structures should be able to meet the requirements. Owing to that this ship having being successfully launched, the reliability and usability stated in this paper have being verified. Therefore, it is of quite value to be referred in technical analysis for launching on the horizontal slipway.
Meanshift Tracking with Kalman Filter and Rotation-Invariant Features
Authors: Lu Rui Tao , Huang Xin Sheng , Xu Wan Ying , Shen Lu Rong
Published: August 2013

This paper presents an improve Meanshift tracking algorithm based on Kalman filter and Rotation-Invariant Features. Firstly, this paper forecasts the original alternate position using Kalman filter. Secondly, a kind of spatial histogram based on GRA (Gradient Radius Angle, GRA) is introduced, which is a rotation-invariant descriptor combined the information of gradient. At last, this paper searches the scale factor by the normal scale space decomposition technique. Experiments show that the method concerned in this paper has better performances than two improved algorithms.
MapReduce-Based Ant Colony Optimization Algorithm for Multi-Dimensional Knapsack Problem
Authors: Liu Rui Tao , Lv Xiu Jian
Published: August 2013

This paper uses MapReduce parallel programming mode to make the Ant Colony Optimization (ACO) algorithm parallel and bring forward the MapReduce-based improved ACO for Multi-dimensional Knapsack Problem (MKP). A variety of techniques, such as change the probability calculation of the timing, roulette, crossover and mutation, are applied for improving the drawback of the ACO and complexity of the algorithm is greatly reduced. It is applied to distributed parallel as to solve the large-scale MKP in cloud computing. Simulation experimental results show that the algorithm can improve the defects of long search time for ant colony algorithm and the processing power for large-scale problems.
Charging Station Battery Optimal Distribution Software Design Based on GUI Technique
Authors: Shi Qing Sheng
Published: August 2013

Charging station network is one of the most critical links, during the large-scale operation progress of new energy vehicles. Due to the large number of charging stations in network, the number of batteries distributed in the whole charging station network is also very large. Timely and accurately delivering of replaced battery would save a lot of material and manpower costs and time. Therefore, battery optimal distribution problem in charging station network must be resolved. The main purpose of this paper is to design the power battery optimal distribution software. Matlab GUI (Graphical User Interface) technique is adopted to design simulation test software interface, and m language is used to implement background operations of optimal algorithm parameters.
SWOT Analysis for Serviced Apartment Based on Information Technology
Authors: Shen Hong , Jiang Zhen Zhen
Published: August 2013

With the acceleration of building Shanghai as an international financial center, a large number of small and medium-sized enterprises and foreign firms are stepping up to seize the market. Business and tourism floating population keep increasing. Data of the 6th Population Census showed that Shanghais resident population has reached 23019148, and population coming from other provinces but now living in Shanghai for more than half a year has reached 8977000, which accounting for the city's resident population of 39%.7 High percentage of non-native population led to housing consumption problems. The traditional hotel seems too expensive for people who want to settle down for a long time. The serviced apartment which appeared in the 1990s in China, has won a large number of small and medium-sized enterprises and expatriate managers' favor because of the hotel-style services, apartment-style management and relatively cheap prices. And it is still developing very fast. This article is focus on analyzing Shanghai serviced apartment by SWOT, so as to provide suggestions for consumers.
Research on Optimization of Water Jet Propulsion
Authors: Wang Chang Tao , Kan Feng Long , Zhao Lan Guang , Wei Wei
Published: August 2013

Based on characteristic of water jet, there are two important factors to product the thrust. One factor is pump speed and the other is the nozzle diameter. So, The significant optimization be required in order to overcome the existing water jet propulsion problem. In this paper, the water jet propulsion system model be studied at first, and then pump and nozzle optimization be discussed. At last, the result shows that the thrust of water jet by controlling the nozzle diameter size and pump speed.
Predictions of Dynamic Damping Coefficients of Basic Finner Based on CFD
Authors: Zhao Zhong Liang , Wang Hong Biao , Tao Yang , Wang Yuan Jing
Published: August 2013

A method to predict pitch and roll damping derivatives of aircraft geometries with fins using an unsteady RANS solver is presented. A three-dimensional structured RANS solver based on the arbitrary Lagrangian-Eulerian (ALE) formulation with a dynamically deforming mesh algorithm is used and validated with the wind tunnel and ballistic range data available in the literature. Roll and pitch damping derivatives are calculated from load history of the unsteady flow around the model. A standard research configuration, known as the Basic Finner, is studied under forced pitching and rolling conditions. Pitching and rolling motions with oscillation are analyzed at supersonic Mach numbers ranging from 1.5 to 2.5. Predicted results showed good agreement with the available wind tunnel data.
Application of LED Light Source in the Flow Imaging
Authors: Yao Jin Bo , Yang Yue Ming , Yang Qin Yu , Liu Xiu Juan , Jin Dun
Published: August 2013

Aircraft in flight, such as supercooled water droplets encountered icing conditions suitable for the external environment, the relevant parts of the body will freeze, making the aircraft's aerodynamic performance deterioration, severe endanger flight safety, in addition, the aircraft parked in the open winter months , there will be icing, you need to clean up before takeoff. We should grasp the mechanism of aircraft icing, environmental factors and easy to freeze parts of the body. This paper presents a simulation using the wind tunnel icing device icing wind tunnel simulations can reproduce the real situation of aircraft icing, for guiding practice and got good results.
FlexRay Network Development Based on Network Designer and Rapid Control Prototyping
Authors: Wu Jian , Yao Lin Lin
Published: August 2013

Network Designer, which is suitable for the CAN, LIN and FlexRay design, is used to design the database of FlexRay according to the actual requirements, including the definition of nodes, messages and signals of FlexRay cluster and the design of communication schedule. And The Network Designer is able to export FIBEX. Import the database file which was well designed to the FlexRay Configuration Tool, then configurate the corresponding parameters of the software and combine it with MATLAB/Simulink to create RTIFlexRayConfig model. MicroAutoBox which is a tool of rapid control prototyping and Simulator which is a tool of hardwarein-the-loop simulation are used as two nodes of FlexRay to verify network performance by transmitting drivers input signals.
The Research on Reconstructing the Virtual Environment of E-Commerce Clothing
Authors: Yu Xiao He , Pan Lan Tian
Published: August 2013

Clothing is a part of human civilization. The e-commerce revolutionizes the concept and business mode of clothing sales. But there are still many unsatisfactory problems in clothing sales through the e-commerce at present. Compared with the traditional clothing stores, E-commerce clothing lacks many service functions. If we want to provide more service content in E-commerce clothing, it needs to reconstruct virtual environment. The paper promotes ideas that dividing the E-commerce clothing system into three subsystems to improve the cloth sales online. The subsystems are the subsystems of cloth exhibition, and the subsystems of cloth fitting and the subsystems of cloth designing.
Research on Key Technologies of Optimal Routing Design in Ad Hoc Networks
Authors: Sun Hua Feng
Published: August 2013

In this paper, to the deficiencies of the Ad Hoc network in optimization design, we design a multi-objective heuristic algorithm to optimize global collocation of the routing protocol parameters with Pareto genetic algorithm. In process of the optimization, based on the performance indicator value corresponding to individual of the entire group calculate its Pareto Level to obtain a Pareto optimal set, and each solution in the collection is Pareto optimal solution.
Achieving Message Board Function Based on Storage Services of the Windows Azure Platform
Authors: Ye Yan Xin , Cui Jian Ming , Lui Jian Ming
Published: August 2013

in order to study the development of the Windows Azure platform, the paper through the use of cloud computing, one of the platforms Windows Azure, using its Table Storage storage services,to realize a message board function; and realize a good combination of NET Framework and Windows Azure, and explore the Difference of the Microsoft Windows Azure cloud computing platform development and the difference between ordinary ASP.NET development.
Cloud Computing Service Security and Access: Bridging the Gap between Providers and Customer
Authors: Zhao Xiang Hui , Liu Hui , Yi Jin , Tian Wen , Luo Ning , Ye Lin
Published: August 2013

This study explores the cloud computing service security and access by considering the cloud provider, service provider and the customers concern and identifying new trends of challenges relate to the two types of concerns. Focusing on the mobile environment, strategies to cope with the challenges are proposed. By investigating concerns from different perspectives, and drawing upon the proposed levels of strategies, we hope to bridge the gap between technology/service providers and the customers.
Security Middleware Based on Smart Card for E-Business
Authors: Zhao Gui Fen , Li Ying , Du Li Ping , Guo Jian Wei
Published: August 2013

With the increasing amount of online shoppers, the security for E-Business becomes more important. Security middleware is one of the methods to achieve secure E-Business application. A security middleware based on smart card and combined secret key is proposed for mobile users and PC users. The security components are developed on the basis of cipher service provide by smart cards, encryption cards and combined secret key method, and provide security service interfaces based on J2EE. The middleware is proved valid for protecting the secrecy and integrity of order information during payment test.