bluuebunny/crossref_metadata_2025 huggingface dataset:
Application Study of Flotation Column in Reverse Flotation of Magnetic and Hematite Mixed Iron Ore
Authors: Wang Wei Zhi , Chen Li Ping , Zhao Liu Bei
Published: October 2013

This test used countercurrent bubble contact flotation column in reverse flotation to improve the grade of magnetic concentrate. By the tests of operating conditions and reagent system experiment, when the ore grade of concentrate after magnetic separation is 42.15%, after one roughing ,we can obtain the grade is 65.82% and recovery rate is 62.79% of the concentrate.
Application of Building Information Model Technology in Shanghai Disaster Tolerant Center Construction
Authors: Li Qian , Ke Han Yang
Published: October 2013

Shanghai Disaster Tolerance Center (SDTC) is the first case led by owner to apply the building information model (BIM) technology in the life cycle engineering construction of the center. BIM technology is applied in construction, operation and maintenance of SDTC to guarantee the quality management performance of construction, improve the efficiency of design, construction, operation and maintenance of the SDTC.
Research of Risk Control of Public Construction Project Based on Fault Tree
Authors: Chang Liu , Luo Fu Zhou
Published: October 2013

According to characteristics of the project characteristics, fault tree analysis method is adopted and fault tree model is established to decompose the reasons that affect the project schedule layer by layer. Taking a dam construction project as an example, according to the degree of structural order, various factors are explored to calculate the degree of influence of the delay in progress, and the corresponding measures are proposed to control the schedule.
Studies on Sprinklers Arrangement in Sprinkler Systems
Authors: Cui Fan Lin , Qu Fang , Cui Yong Yi , Mai Lei
Published: October 2013

To improve the fire suppressing efficiency and reliability of the sprinkler systems, in this paper we analysis and discuss a problem about sprinklers arrangement. Use the water distribution curve of ZST-15 and the MATLAB to accomplish a 3D surface fitting among radius of protection, working pressure and mounting height as well as get a function expression about them. After that, aiming at the problems happened in engineering practice, we propose a method of determine the sprinklers arrangement distance and their mounting height, in addition give suggestions about choosing fire pools and work out the flow rate of sprinkler systems through calculation as well.
Calculations and Modeling of Material Constants in Hyperbolic-Sine Creep Model for 316 Stainless Steels
Authors: Yang Fu Qiang , Xue He , Zhao Ling Yan , Tian Jin
Published: October 2013

The material constants calculation models for hyperbolic-sine creep model were proposed. The material constants used in hyperbolic-sine creep model for 316 stainless steel were calculated due to the models proposed and experimental data in the temperature range from 873K to 1023K. The relationships between material constants of 316 stainless steel creep model and temperature were obtained by curve fitting. The creep rate predict model of 316 stainless steel with only stress and temperature was also developed, the creep rates predicted were in good agreement with experimental data.
Illustration of Fracture Mechanism in High Temperature for TiAl Alloys
Authors: Zhang Guo Tao , Rui Zhi Yuan , Feng Rui Cheng , Zuo Yan Rui , Yan Chang Feng
Published: October 2013

For the shorting of fracture mechanism from the point of high temperature condition, so a new method of illustration, which is carried out under the condition of high temperature, for fracture mechanism will be adopted in this paper. And a more accuracy and more understandability result can be got by this new method. Besides, the performance of TiAl alloys can be improved by making grains refined to decrease the slip plane spacing, which can be got from the mechanics analysis.
Mechanical Properties of Rice Straw Particle/HDPE Composites
Authors: Chen Gui Hua , Wang Dan Dan
Published: October 2013

The rice-straw particle /HDPE composites were made by compression molding process. Effects of the content of the rice-straw particle, the dosage of the titanate coupling agent and the time of hot-press were analyzed. Mechanical properties of the composites were tested, such as MOR, MOE by universal material testing machine. The result showed that rice-straw particle /HDPE composites have relatively good mechanical properties. The effect of the content of the rice-straw particle on the MOR and MOE of rice-straw particle /HDPE composites are very significant.The mechanical properties of the composite material improved by adding titanate coupling agent. The optimized processing conditions are that the content of the rice-straw particle is 50%,the dosage of the titanate coupling agent is 3%,the time of hot-press is 4 min.
A New Purification Way for Multiwalled Carbon Nanotubes
Authors: Shen Lei , Liu Mei
Published: October 2013

A new purification procedure was used for the purification of multiwalled carbon nanotube (MWCNTs) based on nitric acid oxidation. Using thermogravimetric analysis (TGA), and Energy dispersive X-ray analysis (EDX) to characterize the morphologies of MWCNTs oxidized under various conditions. The TGA provided clear evidence for the presence of carboxylic groups (COOH) attached to the surface of MWCNTs resulting from the acid treatment.
Preparation of PVAc/CNT/Carbon Black Composite Particles
Authors: Wang Gu Qin , Cui Yang
Published: October 2013

Conductive PVAc/CNT/CB composite particles were prepared through emulsion polymerization. To get the good dispersity and chemical reactivity in the polymerization system, CNT was first modified with high concentrated nitric acid and sulfuric acid. And then in the polymerization process CNT and CB were evenly dispersed into the poly (vinyl acetate) matrix and a uniform and stable conductive network was obtained finally. A series of composite particle were prepared by changing the content of CNT. And the resistivity and structure of composite particles were determined by four-probe method and FTIR. Furthermore, the kinetics of emulsion polymerization was also investigated.
Study of Matrix Transfer Multipliers for Normalized Pseudoframe Wavelets and Applications in Material Engineering
Authors: Gao Hong Wei
Published: October 2013

Materials engineers design, produce and evaluate materials and their use. In this work, the notion of the bivariate generalized multiresolution structure (BGMS) of subspace L^2(R^2) is proposed. The characteristics of bivariate affine pseudoframes for subspaces is investigated. The construction of a GMS of Paley-Wiener subspace of L^2(R^2) is studied. The pyramid decom position scheme is obtained based on such a GMS and a sufficient condition for its existence is provided. A constructive method for affine frames of L^2(R^2) based on a BGMS is established.
Study on Hollow Microspheres with Conductive and Magnetic Properties
Authors: Xu Hui Fang , Zhang Hai Jiao , Xu Yun He , Dong Wei , Zhang Lei Chang
Published: October 2013

Intact Fe3O4/polyaniline (PANI) composite hollow microspheres were prepared by using hollow glass microspheres (HGS) as substrate. Fe3O4 nanoparticles were synthesized by adding surfactant of sodium dodecyl-benzenesulfonate (SDBS). HGS was pretreated by silane coupling agent, and consequently adsorbed magnetic iron oxide. A successive coating of polyaniline layer on HGS/Fe3O4 was involved through polymerization of aniline with HCl as dopant, and finally the multifunctional composite hollow microspheres (HGS/Fe3O4/PANI) were obtained.The morphology analysis by SEM revealed that the composite microspheres were formed by a layer of dense Fe3O4 nanoparticles and a layer of PANI on HGS. It was found that the conductivity of the prepared HGS/Fe3O4/PANI was about 10-3S/cm, and the magnetization was of 5.60 emu/g, indicating the composite microspheres were multifunctional with conductive and magnetic properties.
Numerical Implementation of a Multi-Physical Fields Coupling Constitute Model
Authors: Sun Yu Jie , Cui Qing Chun , Zhang Suo Huai , Yan Li Jun
Published: October 2013

The objective of this paper provides a numerical implementation procedure of thermo-metallurgical-mechanical constitute equation based on additively decomposition of strain rate. Together with phase transformation kinetics, the macro material properties are determined by assigning temperature dependent material properties to each phase and by applying mixture rule to combine. Then the constitute equation is implemented into general purpose implicit finite element program via user material subroutine. The effectiveness of developed computational method is confirmed by a Satoh test simulation. Simulation of Satoh test demonstrates that transformation induce plasticity has significant effect of the evolution of residual stress and can not be neglected for alloy steel during hot working process.
The Characterization of Two-Direction Vector-Valued Wavelets and its Applications in Material Engineering
Authors: Chen Qing Jiang , Chen Huan , Gao Hong Wei
Published: October 2013

Material science is an interdisciplinary field applying the properties of matter to various areas of science and engineering. In this work, we study construction and properties of orthogonal two-direction vector-valued wavelet with poly-scale. Firstly, the concepts concerning two-direct-ional vector-valued waelets and wavelet wraps with multi-scale are provided. Secondly, we prop ose a construction algorim for compactly supported orthogonal two-directional vector-valued wave lets. Lastly, properties of a sort of orthogonal two-directional vector-valued wavelet wraps are char acterized by virtue of the matrix theory and the time-frequency analysis method.
Design and Analysis of a Transmission Mechanism for Aerostatic Guideway
Authors: Deng Ming Min , Long Wei
Published: October 2013

Based on requirements of accuracy and velocity, the speed-controlled twist-roller transmission is designed and its working principle is particularly discussed according to friction transmission theory. Then the corresponding mathematical deduce is given. After the strength check and feasibility analysis of the transmission agents, ADAMS is used in kinematics analysis for the designed transmission agent. Finally, some related conclusions on transmission agents stationary are got.
KEYWORDS: twist-roller transmission; friction; motion simulation analysis;
Manufacturing Technique and Bacteriostatic Property Evaluation of Polyvinyl Alcohol/Sodium Alginate/Angelicae Dahuricae Radix Fibrous Membrane
Authors: Lou Ching Wen , Lin Meng Chen , Lu Chao Tsang , Huang Chien Lin , Lin Jia Horng
Published: October 2013

This study aims to produce bacteriostatic fibrous membranes, and polyvinyl alcohol (PVA), sodium alginate (SA), and Angelicae Dahuricae Radix (AC) are used to form PVA/SA/AC fibrous membranes. This study uses different solvents for the extraction of AC extracts. Fiber types, ultraviolet absorption spectrum analysis, and bacteriostatic property test are performed on the resulting fibrous membranes to evaluate bacteriostatic effects of different solvent and extraction times; thereby determining the optimal AC extract. The experiment results show that AC that extracted with ethanol for 48 hours provides resulting membranes with significant bacteriostatic effect.
Manufacturing Technique and Property Evaluations of Protective Textiles
Authors: Lou Ching Wen , Li Ting Ting , Lin Mei Chen , Lin Jan Yi , Lin Jia Horng
Published: October 2013

Global warming increases each day and causes people to pay more attention to the reduction of carbon dioxide emission in order to mitigate the increase in temperature. Reducing, reusing, and recycling can effectively reduce the emission of carbon dioxide, to attain goals of energy conservation and carbon reduction. This study aims to explore the difference in the punch resistance and impact strength between the polyethylene terephthalate (PET) nonwoven fabrics and PET/TPU honeycomb grid/PET (P/T/P) composites. Recycle PET, high strength PET, and low melting PET are made into PET nonwoven fabrics, two layers of which are laminated with a TPU honeycomb grid, the interlayer, to form P/T/P composites. The constant rate puncture resistance, dynamic puncture resistance, and impact strength of PET nonwoven fabrics and P/T/P composites are evaluated. The experiment results show that both the constant rate and dynamic puncture resistances of P/T/P composites are lower than those of PET nonwoven fabrics.
Fracturing Well Production Dynamic Simulation in Fractured Tight Sandstone Gas Reservoir
Authors: Xie Chao Yang , Hu Yong Quan , Chen Xing , Ma Ying Chao , Zhao Jin Zhou , Mou Li Ming
Published: October 2013

The tight sandstone formation usually has natural fracture, which is the foundation of effective development using hydraulic fracturing. The conventional reservoir productivity simulation method don't adapt to it. In this paper, Warren & Root model was used for describing infinity tight fractured reservoir model with vertical hydraulic fractures. Then, assuming the fracture length and the width does not vary with time and formation pressure, fracture seepage equation was obtained in base of the one-dimensional flow Darcy percolation equation and continuity equation. By Stehfese, a method of numerical inverse transformation, production performance simulation model was established for natural fractured tight sandstone reservoir. Taking for actual example from Daqing oilfield, affection of characteristics of natural fractures and artificial fracture parameters on productivity of natural fractured tight sandstone reservoir were analyzed. Elastic storability ratio has a greater influence than interporosity flow coefficient. It was the core technique for the gas reservoir to effective development by large amount of fluid and low sand ratio.
High Temperature and High Pressure ESP Performance Testing System Design
Authors: Li Xiao Qing , Liu Xiao Yan
Published: October 2013

With the development of oilfield exploration, the performance of electric submersible pump (ESP) has been enhanced very fast. It requires testing techniques develop at the same time. The most outstanding question is the testing of high temperature and pressure ESP. A testing well was drilled in Daqing in 1992. It keeps the water liquid state on 150 centigrade by high pressure. This system can simulate operational mode 3000 meters under the ground. But many new ESPs have been produced these years. The quondam testing system couldnt meet the testing requirement. A new testing system is desiderated eagerly. This paper developed a high temperature and pressure ESP testing experimentation system. Hydraulic/thermodynamic analysis calculation has been carried on. Friction resistance from constant pressure point to the suction inlet of hot water pump and the ESP in heating-forced cycle and experimentation primary cycle are calculated respectively. Keeping the water liquid state on 180 centigrade, constant pressure value was fixed on 2.5 MPa. The heat load is calculated including the heat that the water in the system and the equipment need and the heat loss. In order to protect ESP from emanating too much heat to keep the temperature and pressure of the system steady, heat exchange system has been designed. Cold load and heat exchange square have been calculated. Friction resistance and the size of the cold water cistern have been calculated. These provide necessary academic foundation for the testing experimentation of high temperature and pressure ESP.
A Gluing Device Based on PLC for Manufacturing Flap-Disks
Authors: Zhang Xi , Yan Dong , Wang Qiang , Lv Qi Bing
Published: October 2013

The gluing control system designed for production plants to manufacture flap-disks was investigated using programmable logic controller (PLC) and servo. The system has been mainly developed to achieve efficient gluing for the back cover. It is implemented by a PLC, a human-machine interface (HMI), a positioning module and sensors, as well as servo amplifiers and motors. Issues was discussed in this paper, such as connection of the hardware, working mechanism design, capacity selection of servo motors, high-speed and uniform gluing, means of pre-opening and delayed-shutoff for the needle valve and etc. Hardware and software was developed for the system and high-precision gluing was achieved. The device has been provided for industrial applications, which has greatly improved the production quality and efficiency.
Vibration Performance Analysis on Gear Systems
Authors: Fang Lei , Li Jin Fang , Si Li Li
Published: October 2013

High-quality and high-performance gear research is a significant key technology research projects in energy, transportation, chemical industry, metallurgy common areas. The vibration and noise of gear transmission mostly come from the working gear transmission. The dynamic properties of gear transmission include the dynamic load of gear transmission system, the mechanism of vibration and noise, computing and control, which are the main directions of the future research.
Exploring Autofrettage Process to Improve the Fatigue Life on High-Pressure Cylinder
Authors: Yang Feng Ling , Zhang Shi Jin
Published: October 2013

Autofrettage process is now widely used to improve fatigue strength of high pressure components. This paper focuses on the fatigue life improvement of the high-pressure cylinder treated by autofrettage process. In this process, a high pressure cylinder treated by autofrettage process has been simulated by using FEA software, and surface variation of the cylinder has been analyzed. To further understand this process, theoretical fatigue analysis has also been carried out.
Research on the Turbocharger Technology of Piston Aircraft Engine
Authors: Pan Zhong Jian , He Qing Hua , Guo Yong , Zhao Yu Ming , Yang Jing
Published: October 2013

The supercharger technology of piston aviation engine determines its flight capabilities, and then establishes a turbocharger simulation model of an aviation piston engine. After simulating the engine ground features and 5000-meter altitude characteristics, and comparing the efficiency of compressor and turbocharger in different environments, after the installation of mechanical supercharger, gas flow has been improved, the cylinder pressure decreased about 10% compared with ground condition and engine altitude state power is restored, even 20,000 feet Power restored to 80%, which can meet the needs of high-altitude flight.
Study on the Removal Function of Annular Polishing Pad Based on the Computer Controlled Polishing Technology
Authors: Zhang Wen Biao , Wan Shu Min , Lin Bin , Zhang Xiao Feng
Published: October 2013

On the basis of the Preston assumption, the removal function of the annular polishing pad with the structure of the dual-rotor movement has been studied. The level of the similarity of the characteristic curve of the annular polishing pad and the Gaussian distribution has been evaluated by the tending factor. The pulse iteration method and the matrix calculation have been used to compute the residual error and the dwell time. The simulation result proved that the residual error (RMS) polished by the annular polishing pad had dropped 8.7% than that polished by the normal polishing pad with the same initial error condition, the surface quality has been improved by the new method.
Effect of Cracked Blade Distribution on Vibration Characteristics of Centrifugal Impeller
Authors: Cheng Gang , Li Jian Feng , Wang Wei Qiang , Sun Jie
Published: October 2013

In this paper, the finite element analysis is made to the modal analysis of the impeller, a finite element model of a impeller with cracks was established. This paper presents results of the modal of the compressor blade subjected to centrifugal force and aerodynamic equilibrium pressure. In this analysis, the numerical models without defects and also with cracks were defined. The simulation results showed that the centrifugal force due to rotational speed can greatly influence the frequency of the impeller. The distribution of two cracked blades effect the natural frequence of the impeller. When two cracked blades locate in the interval position, the increasing value of frequence is maximum. When the two cracked blades interval 150°, the increasing value of frequence is minimum. It provides a basis for modal calculation of the impeller.
Effects of Tooth Number of Drive Gear on Mechanical Properties of Polypropylene/Polyester Composite Tubular Knits
Authors: Lou Ching Wen , Chen Jin Mao , Hsieh Chien Teng , Lin Jia Horng
Published: October 2013

The severe global climate changes result in consecutive torrential rains in rainy season, and causes water loss and soil erosion. For an effective water and soil conservation, geotextiles are commonly used in geotechnical engineering. Geotextiles should able to isolate soil, filter water, and reinforce the soil; therefore, the material for geotextiles should be acid-resistant and alkali-resistant, such as polypropylene (PP) and polyester (PET). This study uses PP fibers as the skin and PET plied yarns as the core to form PP/PET composite tubular knits on a cord knitting machine. The PET plied yarn is fed with a specified tensile strength, and only the tooth number of the drive gear varies. Mechanical property test results show that a drive gear of 30 teeth increases the tensile strength of the resulting tubular knits; however, with a drive gear of 35 teeth, the tensile strength decreases. An optimal core coverage occurs with a drive gear of 30 teeth.
Parameter Optimization Experiment of Magnetorheological Bearing
Authors: Li Rui , Du Peng Fei , Zhou Si Min , Zheng Tai Xiong
Published: October 2013

The active bearings with variable damping and stiffness are important for vibration isolation in wide frequency excitation. A model of vertical isoaltion system via magnetorheological (MR) bearings was built. Based on analyzing the characteristics of MR grease and MR elastomer, an MR parallel-isolator was designed to instead the passive bearing.Then an adaptive particle swarm optimization (PSO) was adopted to adjust the parameters of MR bearing. A vertical MR isoaltion experiment was proposed. Results demonstrate that MR bearings have better performance than passive bearing in concurrently restraining force transmissibility and vibration acceleration.
A Comparative Study of Firefly Algorithm and Shuffled Frog-Leaping Algorithm for Constrained Free and Manufacturing Optimization Problems
Authors: Aungkulanon Pasura , Srikun Isaree , Ruekkasem Lakkana
Published: October 2013

Manufacturing process problems in industrial systems are currently large and complicated. The effective methods for solving these problems using a finite sequence of instructions can be classified into two groups; optimization and meta-heuristic algorithms. In this paper, a well-known meta-heuristic approach called Firefly Algorithm was used to compare with Shuffled Frog-leaping Algorithm. All algorithms were implemented and analyzed with manufacturing process problems under different conditions, which consist of single, multi-peak and curved ridge optimization. The results from both methods revealed that Firefly Algorithm seemed to be better in terms of the mean and variance of process yields including design points to achieve the final solution.
Research on Characteristics of Joint Point of Power Transmission Tower
Authors: Feng Yan Ting , Ke Hao , Xu Xue Xia , Dai Xiao Hao , Fan Hui , Niu Xiao Guang , Ma Hai Jun
Published: October 2013

Based on tension tests for tower bolt, it was found that the pretension increased with the extension of torque retention time, and manifested characteristics of decreasing at early stage then increasing at later stage during the tension process, that provided guidance for bolt fastening.
An Image-Based Method for Automatic Crack Detection for the Mechanical Test of Clinch Joints
Authors: Zeng Kai , He Xiao Cong , Deng Cheng Jiang , Yang Hui Yan , Zhou Sen , Liu En
Published: October 2013

Clinching is a cold forming process for hard-to-weld materials joining in the field of automobile lightweight design and manufacture. The automatic crack detection for clinch joints in the loading test is an important monitor process. In this paper, the method of automatic crack detection on clinch joints by using digital image analysis technology was presented, and an image acquisition and processing platform coupled with a single shear pulling test machine was introduced. In order to insure the real-time of the calculation, multiple scan lines perpendicular to the potential crack strip was set, and threshold segmentation and edge detection with Sobel operator was used in the analysis. Results showed that the analysis procedure proposed in this paper is available for automatic crack detection for the loading of clinch joints and can get high computer speed.
Studying and Simulation Analysis for Rubber Track of Rescue Robot
Authors: Ma Hong Wei , Wang Chuan Wei
Published: October 2013

Rubber track of Rescue Robot was dispersed into limited number of track blocks by the method of finite segment method used in flexible multibody dynamics. The two neighbor track blocks were connected by springs and dampers, then the moldel was become a multi-rigid-body system with flexible joint. Rubber track was modeled with the help of macro command used in the secondary development of virtual prototype technique software named ADAMS. Flexible connection was realized by the method of adding Bushing, and then a new method was proposed to build rubber track model. The obstacle-surmounting simulation of climbing the barrier of single step was carried out. It intuitively reflected the stress and deformation under the condition of climbing barrier. The method mentioned above laid good foundation for studying obstacle-surmounting abilities of the rubber-tracked robots and dynamic characteristic of the tracks.
Design and Simulation of a Variable Structure Mobile Robot
Authors: Sun Zhang Jun , Yan Jing Long , Li Chao Quan , Li Yue Ju , Di Chao
Published: October 2013

Combined with the advantages of good protection of global robot, self-equilibrium, easy control of wheeled robot and strong obstacle surmounting ability of turbofan robot, a variable structure mobile robot which has three kinds of basic modalities of global, turbofan and three-wheel is designed. The balancing leg is retracted and the two polymorphic wheels of the robot are closed into a sphere while in the global state, and it could be conveniently threw, carried and make all directional movements on the flat grounds. When confronted with the complicated terrain environments of sand, slopes etc., the two polymorphic wheels will be outspread to the turbofan state, and the balancing leg will be opened out as a third supporting wheel so as to strengthen the ability to adapt to the environment. When the two polymorphic wheels are expanded into two wheels, the robot motions are more smoothly and easily to be controlled. A virtual prototype of the robot is designed by three-dimensional technology, as well as the motion simulation. Rationality of the mechanism design scheme of the variable structure mobile robot is verified.
Rapid Development of Novel Integrated Pressure Compensating Emitters
Authors: Liu Jie , Lu Gang , Wei Qing Song , Shi Yu Sheng
Published: October 2013

Although pressure compensating emitters (PCE) have many advantages, they are difficult to develop and very costly. Traditional PCE are composed of emitter structures and compensating diaphragms. Their manufacture is very difficult and time-consuming. In this paper, we invented novel PCE with variable flow channels, which are designed as integrated structures with pressure compensating barriers, and manufactured three of them with different structures based on the rapid prototyping/rapid tooling technology. The pressure-flow test showed their behavior indexes were 0.009, 0.008 and 0.011, respectively, indicating this type of novel PCE have remarkable compensating effect.
Influence of Stress Ratio on Fatigue Crack Propagation in TiAl Alloy
Authors: Feng Rui Cheng , Rui Zhi Yuan , Zuo Yan Rui , Zhang Guo Tao , Yan Chang Feng
Published: October 2013

Based on the experiments did by B.K.Parida and T.Nicholas [1], the fatigue crack propagation rate of TiAl alloy under different stress ratios had been tested in order to find out the role of stress ratio and to derive an improved fatigue crack propagation formula for region II(the expansion region) according to Paris formula and to calculate the specific values of the constants in the formula. The experimental results reveal that stress ratio has a significant influence on fatigue crack growth rate.
Performance Test Method of the Mixed-Mode Interface of an Integrated-Sensor RFID System
Authors: Qi Shu Zhe , Zhou Song Bin
Published: October 2013

Aiming at the performance evaluation of mixed-mode sensing interface of the integrated-sensor RFID system, an integrated-sensor RFID system was constructed. Then the mechanism of performance evaluation of mixed-mode interface was analyzed. According to the validity and reliability principle, a mixed-mode interface performance testing model was established. Moreover, a Plug-and-Play performance testing method was presented. Finally, the physical platform was set up to test the reading speed and the recognition rate indicator in Plug-and-Play process. Results showed the reading speeds of two STIM maintained at around 656.56ms and 645.24ms steadily during Plug-and-Play process whose Bit Error Rate was 10e-9. Experiments indicate that effective transverse comparison of performance of similar products could be implemented by the proposed method in static environment as well as dynamic environment.
A Model of Detector Generation Based on Immune Recognition and Redundancy Optimization
Authors: Jiang Ya Ping , Zhao Jun Wei , Tian Yue Xia
Published: October 2013

The theory of modern immunology provides a novel idea to study network intrusion detection and defense system. With the concepts of self, nonself, close degree and membership in an intrusion detection and prevention system presented in this paper, a model of detector generation based on immune recognition and redundancy optimization is proposed, in which detectors are generated by clone selection, genetic variation and evolutionary algorithm, as well as the improved redundancy optimization algorithm. The simulation experiments show that the model has higher detection rate and lower false detection rate.
Simulation Analysis of Automatic Grouting Network Control System Based on Matlab
Authors: Qiu Guo Qing , Li Ming , Long Yi , Yu Yong Can
Published: October 2013

Automatic grouting is a very important part in the well drilling process. The stability of grouting system is one of the factors affecting the drilling accident. This paper presents a automatic grouting method based on network control system. In order to find out the influence on the control performance after using network in the system, paper sets up the system model with the simulation toolbox TrueTime-2.0 of MATLAB and separately studies the influence on the control effect by network delay and data packet loss according to the simulation result. The results prove that both the network delay and data packet loss all make great differences on the control performance of system, so we need to take appropriate strategies to reduce the influence in the actual designs.
Calculating the Synthetic Efficiency of Hydroturbine Based on the BP Neural Network and Elman Neural Network
Authors: Zhang Lin , Wang Yi Min , Liu Deng Feng
Published: October 2013

The synthetic efficiency of hydroturbine is the foundation and important basis of economic operation of hydropower plants. However, the traditional calculation methods have large amount of calculation, large errors and other problems. To solve the problems better, this paper introduces the Elman neural network and BP neural network to calculate the synthetic efficiency of hydroturbine. Comparing the results of the Elman neural network and the traditional BP neural network, the result shows that, Elman neural network is an effective way to improve the learning speed, effectively suppress the minimum defects that the traditional neural network is easily trapped in, and reduce the error. The result suggests that the Elman neural network has better nonlinear mapping capability than the BP neural network.
Evaluation of Measurement Uncertainty from Imperfect Data
Authors: Zhang Xiao Zhang , Ge Ai Dong , Ma Jian Wei , Bai Yu Jie
Published: October 2013

The uncertainty evaluation process of imperfect experimental data is presented in this paper. In the process, data neither in steady state nor under normal distribution compared with the conventional assumptions are considered. Results of the evaluation show that the uncertainty is asymmetry to the mean of the data while symmetry in conventional way. Furthermore, three ways to deal with the uncertainty propagation are discussed, and the probability propagation is simulated by Monte Carlo method.
A Distributed Peer to Peer Simulator
Authors: Yan Li , Shen Rui
Published: October 2013

This paper proposed a new distributed peer to peer simulator. The simulator uses message-based event-driven engine with large-scale simulation supported and Cross-platform. Simulator supports multiple protocols, using this simulator test peer to peer agreement, not only to ensure high accuracy, but also effectively reduce the resource consumption and improve the efficiency of the simulation.
Scheduling System for Cloud Federation across Multi-Data Center
Authors: Yao Meng Di , Chen Dong Lin , Chen Xin
Published: October 2013

In the cloud computing federation, the method of cloud computing federation resource scheduling has been introduced to allocate the users requested tasks reasonably to the providers. In the present, single cloud providers method and system of resource scheduling dont apply to the cloud federation environment. Therefore, the solution to the problem of resource scheduling in cloud federation cross data center has become a key technology. The system, mainly about the resource scheduling algorithms across data center, presents the framework and major function of the cloud federation environment cross the datacenter. Furthermore, through Cloudsim, a Web server based system platform was built. Finally, the system proved that it can meet the complicated large-scale demand of users as well as increase the efficiency and profit of resource scheduling among the providers in cloud federation.
Experimental Research on the Adsorption Behavior of NH3 at the Surface of CaO
Authors: Hu Xiao Ying , Ju Shao Da , Wu Ling Nan , Zhao Ming Shi , Dong Chang Qing
Published: October 2013

Temperature programed desorption experiments were carried out for analyzing the TPD spectra of NH3 desorbed by CaO at different temperature ramp, pressure, and different ratio of CaO to CaSO4. Moreover, factors affecting on the adsorption process were analyzed. Based on the activation energy of He, NH3 desorbed at the CaO surface was estimated by experimental spectra and the TPD model.
A Design for Carrier Wave Catching to Micro-Dynamic Signal in USB/UCB
Authors: Xu Xing Yuan , Yu Xin Feng , Shi Wei , Li Pei
Published: October 2013

There exists a contradiction between catching time and catching valve for carrier wave catching to micro-dynamic signal in USB/UCB. So a new arithmetic of long point Base 4 FFT has been designed and emulated.
Classification Research of Rotation Speed Measurement
Authors: Zheng Zhe , Zhang Ren Jie
Published: October 2013

Instantaneous speed measurement system can accurately measure the rotating target and realize the rotation direction judgment. It plays a very important role in industrial applications, as monitoring or controlling the rotation speed of transmitter, motor, turbine. With the development of technology, a modern speed measurement system is demanded to be intelligent, high integration, high precision, high reliability, and low cost etc. Based on the large number of literatures, this paper is a comprehensive review of the principle and application of domestic and foreign mature technology of rotation speed measurement method at present. Through the systematic classification, relationship between the different speed measurements is revealed, and the advantages and disadvantages of different measuring sensor are presented, so that readers can choose reasonable speed measurement method depending on the application, the actual measurement requirements and the test purposes.
Study on the Influence Factors of DWTT for X70 Thick Wall Linepipe
Authors: Liang Ming Hua , Liu Hong Yan , He Xiao Dong
Published: October 2013

Drop Weight Tear Testing (DWTT) method is widely used for determining a materials ability to arrest a propagating crack. The influence factors of DWTT are discussed for X70 thick wall linepipe steel. The effects of nonuniformity of the material, ductile-brittle transition temperature, notch type, evaluation method of the fracture surface, machining method and the test equipments are discussed. Some solutions and recommendations to the problems are proposed.
The Distributions and Moments of the First Entrance Time for Nonhomogeneous (H,Q) Process
Authors: Chen Liu Xin , Li Gen
Published: October 2013

In this paper, we discuss one kind of Markov Skeleton processes, nonhomogeneous (H,Q) processes. We mainly study their distributions and moments of the first entrance time, and we obtain their recursive formula and some related properties.
Thermal Performance of Commercial Vehicle Braking Process during the Vehicle Descending Speed Control on Roads with Long Length Steep Inclination - A Case Study
Authors: Gutiérrez Juan Carlos Horta , Canale Antônio Carlos , Maia Antônio Augusto Torres
Published: October 2013

Study about the performance of the service brakes and the retardation systems of commercial vehicles during the descending speed control on roads with long length steep inclination in Brazil. Mathematical models, based in the equations of the energy balance during the vehicle braking process are used. The thermal performance of the service braking system, of the engine cooling system, and of retarders, are verified for the established maximum safety speeds for a vehicle traveling downhill. The simulations are performed with programs elaborated in the Matlab-Simulink platform and with the vehicles as per the European norm ECE R13 requirements (test type II A) and the Brazilian norm requirement (NBR 10967) for the downhill functional test (test type III). The obtained results show that it is possible to have a forecast of the dissipated power in the engine and the retarder, of the capacity of dissipated heat of the radiator, and other parameters to guarantee the effective speed control of the vehicle, as per the requirements of the norms, even before the road test are performed.
Numerical Simulation of High Frequency Electromagnetic Wave in Microwave Cavity for Soot Oxidation
Authors: Al-Wakeel Haitham B. , Karim Zainal Ambri Abdul , Al-Kayiem Hussain Hamoud , Fawad Hasan
Published: October 2013

Soot oxidation temperature by high frequency electromagnetic energy was proposed using numerical simulation by combining electromagnetic with transient thermal analyses. Equation of electric field distribution in a microwave cavity with perfect electric conductor surfaces and TE10 mode is formulated from Helmholtz equation. The dissipated heat distribution is calculated from the electric field distribution. Six study cases for electric field and dissipated heat distributions were implemented by using ANSYS software based on finite element method. The impact of dielectric sample properties, position, size and shape inside the microwave cavity were predicted. The results from the simulation of electric field and dissipated heat were compared with available data in literature and showed the validity of the analysis. It was found that the electric field forming hot spots at penetration depth and front corners of the soot sample and penetration depth is equal to 12mm but equal to 0 for samples with dimensions less than penetration depth. Dissipated heat pattern depend on electric field pattern and dielectric properties.
Theoretical Analysis and Modeling Fora Piezoelectric Bimorph Actuator with Overhanging
Authors: Yuan Yan Hong , Zhao Wen Jian , Sun Zhi Feng
Published: October 2013

The characteristics of a piezoelectric bimorph that fixed in one end (cantilever structure) have been well studied. The displacement of deformation and the force applying to the load are usually not easy to be both satisfied for many specific applications. In this paper, a new structure of a piezoelectric bimorphusing a hinged support and a pinned support (overhanging structure) has been analyzed and modeled to give flexibility in designing such a device to meet requirements of both the displacement and the force.
Optimization of Epoxy Composite on Thermal Decomposition Utilizing Experimental Design Method
Authors: Chang Huey Ling , Chen Chih Ming , Chen Cheng Ho
Published: October 2013

In this study, the Taguchi experimental design methodology is used to optimize the composition of a nanopowder/epoxy resin material comprising Al2O3, SiO2, carbon black nanopowders, epoxy resin and diluent. A Taguchi orthogonal array is employed in planning the configuration of the samples for the experiment. The signal-to-noise (S/N) ratios, and the variances are analyzed. The thermal decomposition temperature of the nanocomposite with optimum composition increased 37.16°C (increased by 12.5%) compared to pure epoxy. The experimental data generated in the Taguchi trials are processed using a regression analysis technique in order to derive an analytical formula relating the composition of the composite samples to their thermal properties. It is shown that the results obtained using the analytical formula are in good agreement with the experimental observations with only 1.95% error.
Theoretical Analysis and Experimental Verification that Influence Factors of Climb and Conventional Milling on Surface Roughness
Authors: Li Yu Wei , Sun You Song , Zhou Xu Guang
Published: October 2013

The surface roughness is an important indicator of precision. Generally, climb milling which is usually using in finish milling get better surface roughness and accuracy. In this paper, based on geometric analysis, the surface roughness of the conventional milling is better than the surface roughness of the climb. This result has been verified by experiment.
Design of a Kind of Non-Resonant Linear Piezoelectric Motor
Authors: Chen Xi Fu , Huang Wei Qing , Luo Ji Quan , Xu Jing Jing
Published: October 2013

A type of drive foot with displacement amplification was proposed based on analysis of the friction drive principle of the non-resonant linear piezoelectric motors. Firstly, the displacement amplification mechanism of the drive foot was carried on and the elliptical trajectory equation of the drive tip was deduced through the mechanism model of the drive foot. The optimization design of main structure parameters was conducted with finite element analysis software to analyze the influences of displacement amplification. The simulation results showed that the maximum magnification factor can be obtained when H(the thickness of flexible arm) is 0.8mm and θ (the flexible angle) is 12°. A linear piezoelectric motor prototype was designed and fabricated, the experimental results indicated that this kind of motor can run steadily in a wide range (the operation bandwidth is beyond 1kHz) and that the thrust can be 0.35N and the maximum velocity can be 2.5mm/s when the operation frequency is 4kHz and the operation voltage is 90V.
Design of the Typical Claw Structure Using the Technology of LFC
Authors: Feng Xian Zhang , Cui Yan Mei , Yu Li Hong , Chen Liang Ji , Jiang Zhi Qiang , Cheng Jun Wei
Published: October 2013

Based on the size of casting surface parts and the product quality, expendable pattern casting as a new casting method, it greatly improve production efficiency and save the manpower. With the cast process of mixing arm, as the study objective. It can preliminary identify the process plan by analysis of structure of workpiece surface and the casting process. It obtained the registered product under the considering of the main parameters and the rough size. The researched results can supply the reference value for the design and research of the expendable pattern casting.
Cable-Driven Parallel Manipulator for Lower Limb Rehabilitation
Authors: Gonçalves Rogério Sales , Carvalho João Carlos Mendes , Rodrigues Lucas Antonio Oliveira , Barbosa André Marques
Published: October 2013

The development of robotic devices to apply in the rehabilitation process of human lower limbs is justified by the large number of people with lower limb problems due to stroke and/or accidents. Thus, this paper presents a cable-driven parallel manipulator for lower limb rehabilitation which is composed by a fixed base and a mobile platform that can be connected to one cable at most six and can performing the movement of human gait and the individual movements of the hip, the knee and the ankle. This paper starts with a study of the basic movements of the lower limb. Then the kinetostatic and force analysis were presented. The graphical simulation and experimental tests of the cable-driven parallel structure for lower limb rehabilitation movements are presented showing the viability of the proposed structure.
Design and Supporting Force Experimental for the Bionic Water Strider Model
Authors: Wang Qing Cheng , Yang Xiao Dong , Yang Zhuo Juan
Published: October 2013

A bionic water strider model was designed and fabricated, which has four supporting legs with length of 52mm. Supporting legs were made of copper wire with diameter of 0.45mm, through superhydrophobic treatment for copper surface, whose contact angle is 154.3 °. By experimental measurement, the maximum supporting force of bionic water strider model on water surface is 28.5mN, which is 5.6 times its own weight. Adjusting supporting legs spacing, it can affect supporting force of the bionic water strider model on water surface. Experimental determination, the distance of the supporting legs should be larger than 8mm.
Research on Micro and Nano Structure and Wettability for Water Strider’S Leg, Abdomen, Back and Wing
Authors: Wang Qing Cheng , Yang Xiao Dong , Yang Zhuojuan
Published: October 2013

This paper studied wettability of water strider’s typical part, contact angle of water strider’s leg, abdomen, back and wing was measured by the contact angle measuring instrumen, which were 161.5°,156.3°,157.6°and 156.4°respectively, they showed superhydrophobic. Microstructure of water strider’s leg, abdomen, back and wing was observed through scanning electron microscopy, It found that 4 typical parts of water strider are composite structure of micron scale and nano-scale, although their forms is different, they have reached the super-hydrophobic effect.
An Analysis of Visitors' Satisfaction toward Urban Parks Based on the Method of IPA - Illustrated with the Example of Beijing Lotus Pond Park
Authors: An Yong Gang , Tian Zhi Hui , Gan Ni
Published: October 2013

In order to improve the overall image of Lotus Pond Park to the visitors and perfect its service facilities and infrastructure, this paper analyzes the degree of satisfaction toward different aspects of this park from the perspective of the visitors based on the method of IPA so as to enhance the visitors satisfaction and its competitiveness in the market. Through deep research on the features of visitor sources of Lotus Pond Park and analysis of visitors satisfaction, this paper also reflects the strength and weakness in the long-term development under its current conditions in different aspects, and points out the key problems and corresponding countermeasures in its development.