bluuebunny/crossref_metadata_2025 huggingface dataset:
Microfluidic Nonwoven-Based Device as a Potential Biosensor for Sweat Analysis
Authors: Baysal Gülçin , Neşe Kök Fatma , Trabzon Levent , Kizil Huseyin , Gocek İkilem , Kayaoğlu Burçak Karagüzel
Published: January 2014

Monitoring body fluids such as sweat composition can provide useful information about the physiological status. Physiological monitoring of body fluids such as sweat with a textile-based system has the advantage of being non-invasive and easily accessible and such monitoring is beneficial to indicate information about body's physiological status. In the present study, it is aimed to design a textile-based system with non-invasive methods which can be used to monitor a sportsman's performance. A novel, disposable and wearable biochemical analytical device was designed and fabricated by patterning micro channels and reservoirs using SU-8 photoresist through photolithography technique on an absorbant bicomponent Evolon® nonwoven substrate. It was obtained that hydrophilic reservoirs were well defined and demarcated by hydrophobic barriers. Therefore, no liquid leakage was observed around the reservoirs which was crucial for achieving a proper enzyme immobilization and the successful detection of the color change after the simulated sweat was deposited on the hydrophilic reservoir areas. Analyte optimization studies revealed that color change became more evident with the increasing analyte concentration until 20 mM and started to decrease with further increase due to analyte inhibition. Also, on textile fabrics, color densities started to decrease after 40 mM analyte concentration.
Different Content of Short Carbon Fiber Influence on the Hardness of Thermo Plastic Resin Composite Material
Authors: Sheng Yong Hua
Published: January 2014

Using screw injecting molding method to prepare the short fiber strengthening thermo plastic resin composite material, using short carbon fiber as strengthening material and polytene resin as matrix. Study different influence of carbon fiber content to the hardness of short fiber strengthening thermo plastic resin composite material. The result shows that the hardness of short carbon fiber strengthening thermo resin composite material increase as increasing the short carbon fiber content.
Optimization of Cutting Parameters for Turning Based on GALib
Authors: Liu Xue Bin , Wang Xi Bin , Li Chong Ning , Ma Su Chang
Published: January 2014

Combined with the companies own experience in production, establish the parameter optimization model for turning, the parameter optimization software have been developed using the MIT GALib genetic algorithm library in VC6.0 environment. The software can achieve the optimization of cutting parameters, improve the optimization of efficiency, expand the range of applications of cutting database, lay a good foundation for the integration with cutting database and enterprise itself CAPP.
Precise Die Face Design of Drawing Dies for Stamping Process Based on Point Cloud
Authors: Yu Qiang
Published: January 2014

Low cost, short cycle and high quality are the goals of the automobile manufacturing. The auto die is one of the key equipments in automobile industry. For the die manufacturing process is very complicated the trial-and-error method is still used in the tryout process especially the die face tryout. The computer aided engineering becomes more and more important for the new die development. In this paper the precise die face design process based on the blank drawing and die structure simulation for automobile die is studied in detail. The precise die face is generated by the cloud of simulation nodes distribution. The industrial application shows that the precise die face design method based on point cloud generation for automobile die is an efficient way for decreasing the die manufacturing cycle and an accurate method for die tryout process.
Analyses of Strategies and Problems in Resistance Spot Welding of Dissimilar Materials
Authors: Wang Nan Nan , Qiu Ran Feng , Liu Yang Chun , Ma Shuai , Wang Juan , Li Chuang
Published: January 2014

In this paper, the method of resistance spot welding with cover plate was proposed to weld the materials combination of the metal with high resistance and the metal with low resistance, such as steel/aluminum, titanium/aluminum, titanium/magnesium, and steel/magnesium; and the technique of resistance spot welding with insert sheet was proposed to weld dissimilar materials with low resistance and to weld dissimilar materials with high resistance.
Global Existence and Asymptotic Behavior of Solutions for Nonlinear Wave Equations
Authors: Zhang Ji Bing , Gao Yun Zhu
Published: January 2014

In this paper, we concern with the nonlinear wave equations with nonlinear damping and source terms. By using the potential well method, we obtain a result for the global existence and asymptotic behavior of the solutions.
Kinematic Analysis Based on Screw Theory of a 3-DOF Cable-Driven Surgical Instrument
Authors: Chang Li Min , Sang Hong Qiang , Xu Li Ping
Published: January 2014

The Forward kinematic and the inverse kinematic were analyzed of 3-DOF cable-driven surgical instrument in this paper. Kinematics of open chain surgical instrument was derived by the product of exponentials formula, and Paden and Kahan subproblems. Kinematic analysis of the 3-DOF cable-driven surgical instrument can be analyzed by the map relationship between the end effectors and the joint angles of the surgical instrument after removal of cables and pulleys and the map relationship between the rotor angular displacement of the motor and joint angular displacement. The analysis method can be useful for motion analysis and control for cable-driven robotic mechanisms.
Research on FFSR Kinematics and Dynamics Modeling and its Parallel Coordination Motion Control
Authors: Li Hua Zhong
Published: January 2014

Aiming at the attitude interference of space mechanical arm of free-flying space robot (FFSR) against the satellite body, parallel coordination motion control technology for space mechanical arm and satellite body is proposed in this paper. Firstly, the position and velocity at any point based on FFSR system can be expressed as a set of functions consisting of chain pole centroid vectors, and the kinematic model for FFSR has been set up. Secondly, the compact form of dynamical model in system centroid vector function for FFSR is set up with Lagrange method. Finally, inherent redundancy characteristic of FFSR system is applied to propose the parallel coordination motion control technology which simultaneously and effectively controls the motions of F satellite body and configuration of space mechanical arm. Transposition Jacobi controller with inertia feedback has been developed.
Experimental Study on a New Type of Pneumatic Flexible Joint
Authors: Zhang Jin Tao , Geng De Xu , Zhao Yun Wei , Wu Guang Bin , Peng He
Published: January 2014

To improve the transversal stability and lateral stiffness, this paper develops a new type of pneumatic single bending joint. When supplied the air pressure, the joint bends under the action of the bending moment generated at the end of the joint. The bending experiments have been done on the static experimental device and the relation between the bending angle of joint and the air pressure is acquired. The study of this paper laid the foundation for further application of the single bending joint.
Dynamic Response of the Fiber Metal Laminated (FML) Plate with Interfacial Damage in Unstable Temperature Field
Authors: Fu Yi Ming , Shao Xue Fei
Published: January 2014

During the past decades, increasing requirement in aircraft for high-performance, lightweight structures have caused strong interests on the development of fiber-metal laminates (FMLs), which are manufractured from thin layers of glass fibre reinforced composite and alluminium alloy. In this paper, the nonlinear dynamic response problem of the FML plate subjected to unstable temperature with interfacial damage is analyzed. Based on the weak bonded theory, the interfacial constitutive relations of the FML are constructed. According to the Hamiltons variance principle, the nonlinear motion equations of the FML with interfacial damages subjected to the unstable thermal field are obtained. And then, the finite difference, Newmark-and the iteration method are applied to solve the nonlinear motion equations. In the numerical examples, the effects of the interface damage, the amplitude and frequency of imposed loads and the temperature fields on the nonlinear dynamic response of the FML plates are investigated. And in conclusion, the effects of various type of temperature on the nonlinear dynamic response of FML plate are different obviously.
Numerical Study on Creep Properties of the Governing Stage Blade for Large Power Steam Turbine Considering Airflow Force
Authors: Yuan Rui Shan , Liu Tian Yuan
Published: January 2014

As one of the critical components of the steam turbine, the security of turboset is directly affected by the reliability of the blade. In this paper, taking the governing stage blade of a large-power steam turbine for example, the thermal elasticity stress and deformation of the blade were analyzed under the action of airflow force,centrifugal force and temperature load. Then the Norton model was adopted to simulate the blade creep process of 100000 hours and the stress and strain of the blade were obtained.
An Approach to the Design and Calculation of a New Hydraulic Motor
Authors: Li Lin , Shan Chang Ji , Luo Jun
Published: January 2014

This paper makes a strength verification of the chief components of a new hydraulic motor to find out that the design of this new motor meets every standard and this finding will lay a solid theoretical ground for relative experiments.
Performance Optimization of DOA Estimation in Non-Uniform Linear Antenna Array by PSO Algorithm
Authors: Han Hui Lian , Wan Liang Tian , Si Wei Jian
Published: January 2014

In order to estimate the coherent source, a modified multiple signal classification (MUSIC) algorithm is introduced. And a novel arrangement method for the non-uniform linear array by particle swarm optimization (PSO) algorithm is proposed. This method needs merely a signal source whose direction-of-arrival (DOA) has been exactly known. The proposed method has a simple processing and a strong stabilization. It could be applied to optimized arbitrary array configuration. The simulation verifies that the performance of DOA estimation is improved effectively, which has proved the validity of the proposed method.
Nonlinear Behavior and Characterization of Flow through Preferential Seepage Channels
Authors: Fu Li Bing , Li Zhi Ping , Lai Feng Peng , Zhao Lun , Zhang Yu Feng , Fan Zi Fei
Published: January 2014

The Darcy linear equation has been widely used to describe the fluid flow in porous media. It is inaccurately used to describe the flow through preferential flowing paths which exert important influence on the performance of waterflooding reservoir. In this paper, the following two problems have been studied: (1) flow law in preferential flowing paths generated by water flooding; (2) sound nonlinear mathematical model considering special internal and external boundary conditions. The greater the permeability in porous medium becomes, the easier fluid can flow. Meanwhile the flow mechanism would change correspondingly as well. Exact solution of the nonlinear model is obtained analytically by integration. It is shown that in preferential flowing channels the flow velocity and the pressure gradient are a nonlinear relationship which is different from the traditional Darcy theory described as a straight line. Finally, the seepage characteristics of nonlinear flow and its influence are determined by analyzing the pressure gradient curve and velocity distribution between the observation point and the target well. Keywords: Preferential flowing paths; Non-linear model; Forchheimer equation; Integration method; Pressure gradient.
Configuring Agents for the Design of Chamber Systems of IC Equipments
Authors: Hou Yue Min , Ji Li Hong
Published: January 2014

The availability of multi-fields simulation and rapid design is at core of a competitive design ability of chamber systems for IC (integrated Circuit) manufacturing. A computer system is required to provide rapid response for both new designs and processing validations, so programming the design and simulation procedure is necessary. However, some steps of the design and simulation procedure are not clear in the initial design stage in many cases. They only can be decided when part of the structure is visible, particularly when novel structures or new working principles are used. The use of agents is one way to collect information that is required but cannot be pre-programmed in computers. This paper presents a generic method to configure agents, including an analysis framework using a six stage design process, the agent analysis for general design and simulation process, the procedures of design and processing simulation of chambers, the configuration of agents, and finally the conclusion and further works. This paper contributes a generic agent design method.
Finite Element Modal Analysis of S385 Diesel Engine Block
Authors: Liu Bo , Jiang Hui Lue
Published: January 2014

Free and constraint modal finite element analysis were conducted on S385 diesel engine block using FEA according to its structural characteristics. The natural frequencies and corresponding vibration modes of the first fifteen steps of each condition of the block were worked out using Lanczos method. By the analysis of vibration modes, the weak spots of the block were found and corresponding improved schemes were brought forward. The analysis results supplied a theoretical support to improve the structural design and the dynamic response analysis of the block.
Optical Properties of DLC-Ag Nanocomposite and Grating Structures on their Base
Authors: Yaremchuk Iryna , Tamulevičienė Asta , Tamulevičius Tomas , Tamulevičius Sigitas
Published: January 2014

We present the study based on extended Maxwell-Garnett effective medium theory for the effective dielectric function of the diamond like carbon film with embedded silver nanoparticles (DLC-Ag) and rigorous coupled-wave analysis to evaluate resonance characteristics in a visible range of periodic 1-D grating structure on their base. The relief sub-wavelength grating structures on base DLC-Ag nanocomposite have been investigated for sensing applications.
The Finite Element and Experimental Modal Analysis on the Rack of Batching Mixer System
Authors: Zhang Li , Zhang Zhen Zhen , Nie Guang Yuan
Published: January 2014

In this paper, by combining methods of LMS Test.Lab test systems analysis and Ansys finite element analysis on the rack of batching mixer system for dynamic performance analysis, the ODS and the modal parameter of the batching mixer machine rack is obtained. Two research methods results show that, the weakness of the rack vibration is that there is large vibration deformation on the stands of two sides and two beams above the rack. The corresponding parts need firming connection to reduce the vibration of left and right sides, before and after the rack, and improving the working stability of batching mixer machine rack. This paper provides a valuable reference for the vibration and noise control of batching mixer system.
Parameter Design of LS-SVM Based on QPSO and its Application to Node Localization
Authors: Lin Guo Hu , Lou Xu Yang , Cui Bao Tong
Published: January 2014

Regularization parameter and kernel parameters play a crucial role on the accuracy and rapidity of the least squares support vector machine (LS-SVM) algorithm. Existing methods of tuning the parameters for LS-SVM have some disadvantages, such as difficulty of getting global optimum and poor convergent speed. In this work, we develop the parameter design of LS-SVM using quantum particle swarm optimization (QPSO) and apply the designed LS-SVM into node localization. According to the initial values, the optimal parameter values are obtained using the leave-10-out cross validation method. Simulation results show that the proposed method is compared to the coupling simulated annealing (CSA) LS-SVM and the improved particle swarm optimization (IPSO) LS-SVM.
Simulation on Expanding Steady Working Range of Centrifugal Compressor by Self-Recirculation Casing Treatment
Authors: Yang Chuan Lei , Wang Guang Jun , Xu Wen Jiang , Wu Chun Yu
Published: January 2014

Numerical simulation method is adopted to simulate and research Self-Recirculation Casing Treatment (SRCT) on expanding the scope of steady work of high-pressure-ratio centrifugal compressor, and increase the compressor surge margin. Contrast the influences which are caused by structure sizes of the SRCT on the performance of compressor. The results showed that SRCT make the compressor stable operating range average broaden more than 13% on all kinds of speed, the surge margin increased by 11% at most. During the structure sizes, the distance between the bleed slot and the splitter blade has the largest affect on the performance of centrifugal compressor, followed by the bleed slot width, others have less affect. SRCT make the distribution of the compressor impeller inlet relative Mach number is more uniform, weaken the phenomenon of blade leading edge local high Mach number. It is also decrease the blade inlet positive incidence, inhibit separation of the blade surface boundary layer.
Study on Feed Offset in Elliptical Vibration Cutting
Authors: Lin Jie Qiong , Han Jin Guo , Jing Dan , Jing Xian
Published: January 2014

Elliptical vibration cutting (EVC) process and three dimensional cutting surfaces are analyzed in this paper to understand the formation of surface topography. The model of EVC surface topography is established based on curved surface remove function under the assumption that the tool edge is sharp enough. And simulation analysis of surface topography is conducted with different feed offset ratios. Results indicate that RMS change with feed offset ratios λ. The range of RMS is larger when feed offset ratio ranges from both 0 to 0.4 and 0.6 to 1, while the range is smaller when feed offset ratio changes from 0.4 to 0.6. Whats more, RMS reaches the minimum when feed offset ratio is 0.5. The present research provides some references for reducing the height of vibration ripples and improving EVC surface quality.
Friction Properties of Sisal Fiber Reinforced Nano-SiO2 Phenol Formaldehyde Resin Brake Composites
Authors: Zeng Si Hua , Wei Chun , Zeng Ming , Xiong Xue Mei , Liu Hong Xia , Lv Jian , Qin Ai Miao
Published: January 2014

The friction-resistant sisal fiber/nanoSiO2 phenol formaldehyde resin composites were prepared through compression molding. In order to enhance the bonding between the sisal fiber (SF) and polymer matrix, sisal fibers were treated with different surface modifiers (alkali, coupling agent and borax). The friction and wear properties of the composite materials were investigated with a constant speed (D-SM) tester. The worn surfaces of composites were observed by scanning electron microscope (SEM). The results showed that the adoption of nanoSiO2 phenol formaldehyde resin as matrix resin can solve the heat fade of the friction material. The friction and wear parameters of the treated sisal fiber composites can meet the requirement of standards GB5763-1998. The fiber treatment methods had great influence on the friction and wear properties of the fiber composites. Specifically, the borax treated fiber composites showed low wear rates at different temperatures. The highest friction and wear resistances of sisal fiber composites were reached when the fiber content was 15%. Our data demonstrated that the sisal fiber is an ideal substitute of asbestos for brake pads.
Research on Determination Method of Maintenance Support Personnel of Equipment System
Authors: Shan Zhi Wei , Yu Min , Liu Fu Sheng
Published: January 2014

Under the requirement of equipment support work from "equipment type-based" to "equipment competency-based", the equipment maintenance support personnel should be rational defined from the perspective of equipment system. This paper defined the requirement of equipment system support personal using the utilization rate, and gave application examples..
Homing and Docking Autopilot Design for Autonomous Underwater Vehicle
Authors: Pshikhopov V.K. , Medvedev M.Yu. , Gurenko B.V.
Published: January 2014

This paper presents homing and docking autopilot design for the autonomous underwater vehicle (AUV). A nonlinear interrelated dynamic model of the underwater vehicle is considered. The AUV autopilot is designed on base of a position-trajectory control method. Adaptation of the control system is based on robust disturbances estimation. Modeling and hardware results approved feasibility of the proposed methods.
A Novel Isar Active Jamming Method Based on Micro-Motion Modulation
Authors: Zhang Yu , Liu Cong Feng , Zhu Yan
Published: January 2014

It is potentially useful to perform deception or cover jamming using the rotating angular reflectors. Inspired by the coherent jamming and micro-motion modulation, a novel active method is proposed for Inverse Synthetic Aperture Radar. Radar pulses are sampled and frequency modulated along azimuth by sinusoidal signal, and then the jamming signals are retransmitted to the radar and the jamming images are induced. The jamming principle, key parameters and the jamming effect are discussed. The simulated data verify the effectiveness of the jamming method.
Effect of Aging Treatments on the Tensile Strength and SCC Resistance of 7A04 Aluminum Alloy
Authors: Fu Chun Juan , Yu Mei , Ma Rong Bao , Wang Rui Yang , Liu Jian Hua
Published: January 2014

Effect of different aging treatments(namely AT1, AT2, AT3 and AT4) on the tensile strength(TS) and stress corrosion cracking(SCC) resistance of 7A04 aluminum alloy in 3.5% NaCl+0.5% H2O2solution was investigated using constant load tensile stress corrosion test. Electrochemical behavior of the alloy after different aging treatments was analyzed in 3.5% NaCl solution. The results show that AT1 (i.e. 135°C/16h) increases the TS but decreases the SCC resistance of 7A04. AT2 (i.e. 120°C/7h+165°C/10h) provides the highest SCC resistance and simultaneously retains the TS. AT3 (i.e. 115°C/5h+165°C/10h) decreases both the TS and SCC resistance. The electrochemical analysis indicates that the corrosion resistance of AT2 is the highest, which helps enhance the SCC resistance. The scanning electron micrographs reveal that intergranular corrosion occurs from the corrosion pits on the surface of the specimens when tested under stress, resulting in the ultimate fracture.
A Preliminary Design of Recommended Nutrition and Energy Expenditure Application for Smartphone
Authors: Damkliang Kasikrit , Saelue Jiraphon , Jingjit Juntamas
Published: January 2014

This paper proposes the design and a prototype for nutrition recommendation and energy expenditure application. The application runs on iOS smartphones. The application advises the users about their food energy intake in calories and their energy expenditure on exercises in daily life. The application consists of five functions which are food nutrition and exercise list, calories intake and burn history, calories and BMI calculator, food and health articles, and application configuration.
The Technology of Flexible Blank Holder Forming and the Study of its Numerical Simulation
Authors: Li Lian Cheng , Li Ming Zhe , Wang Xiao Wei
Published: January 2014

Abstract. In this paper, we have discussed the principle of the flexible blank holder forming ( FBHF) technology, and established the finite element model of medal deep drawing process based on FBHF. Then we have discussed the FBHF technology by analyzing the system of finite element model. By simulating the forming of rectangular box, we can conclude that FBHF technology will have a greater advantage when the depth of stamping forming is much deeper. We have also compared the thickness distribution parameters, wrinkling parameters, and spring back parameters of rigid blank holder forming parts with FBHF parts. The result shows that the forming parts of FBHF technology has uniform stress and strain distribution, small spring back, the quality of inhibiting wrinkling, crack and other defects.
Specifying Concurrent Program Based on TLA
Authors: Chen Rui , Long Shi Gong
Published: January 2014

.The Temporal logic of actions TLA is a logic for specifying and reasoning about concurrent systems, which make systems and their properties are expressed in the same logic. In this paper, we introduce the concurrent programming languages and behavior semantics, mainly describe safety properties and liveness properties in TLA and take NeedhamSchroeder symmetric key protocol as an example to illustrate how to specify these properties in concurrent program by TLA.
A High-Gain Observer-Based Pd Controller Design for Dynamic Positioning of Ships
Authors: Ngongi Werneld Egno , Du Jia Lu
Published: January 2014

This paper addresses the problem of the dynamic positioning system of surface ships in the presence of constant environmental disturbances. In this paper we propose a high-gain observer-based PD controller to estimate unmeasured velocities of a surface ship. Lyapunov stability theory is applied to prove its stability. Finally, simulation is carried out using SIMULINK and appropriate results are obtained to illustrate the effectiveness and performance of proposed controller.
Design of Mobile Interactive Learning Community Based on Electronic Cognitive Apprenticeship Mechanism
Authors: Chen Hong Ren , Chen Ju Hong
Published: January 2014

With the development of computer technology and the Internet, mobile learning has become more important in E-learning applications. Being freed from traditional fixed locations and times for the unilateral learning of formal curricula, a learning style allowing for adaptation and interactivity as well as ubiquitous learning has emerged. From the perspective of cognitive apprenticeship, in which learning cognition is guided by experts, and the executive process of missions, objectives, and capacities is manifest, the master can observe and discuss with the apprentices, and revise it toward a well-mixed interactive process, promoting learner ability in diagnosing and reflecting upon errors. This study uses the electronic cognitive apprenticeship system as the basis to integrate and construct a mobile digital content learning community. Through the handheld devices or mobile devices used by learners connected through wireless Internet, learners can read and learn digital content on computer hardware fabrication. The learning behavior recorder for enhancing learner learning activity, which integrates records for tracking and learning processes for the learner, in order to conduct master discussion and guidance for apprentices in electronic cognitive apprenticeship.
Analysis of Facade Redesign for Enhanced Satisfaction and Improved Building Performance
Authors: Tokbolat Serik , Al-Zubaidy Sarim
Published: January 2014

The building envelope is known to be an important aspect of design and engineering of ultra-low energy buildings. The facade (building skin) could have the potential to redirect and filter daylight, influence frontal external wind intensity, provide natural ventilation, manage heat transfer, enhance occupant well-being, and create visual and physical connections between the inside and outside. The advances in facade technologies have been triggered in part by higher energy prices, stricter building codes, and higher occupant and owner expectations regarding the quality of the finished construction. This paper provides a comparative assessment of the effect of redesigning an existing building facade and other building improvements. It assesses the impact on external environmental conditions (wind speed and pressure) by employing computational fluid dynamics. The impact of these changes on occupant satisfaction was also gauged. It is hoped that this analysis will provide a framework for assessing benefits of improved facades in other buildings and applications
AFM Analysis of Fullerene C60 Coated Para-Aramid Fabric via Physical Vapor Deposition
Authors: Keskin Reyhan , Yilmaz Koray , Gocek İkilem , Gunduz Gizem , Inan Onur , Yalcinkaya Eda
Published: January 2014

Thin film deposition (TFD) is used to coat materials including metals, glasses and textiles with film thicknesses varying from angstrom to millimeter values. TFD methods find usage in many industries such as coating parts for engineering industries, nuclear industries and decorative industries. TFD methods are applied on textile substrates to obtain anti-static, UV-absorbing, antimicrobial, superhydrophobic and fire-resistant properties. In this study, thermal evaporation which is a TFD technique was used to coat para-aramid fabrics with Fullerene C60 nanoparticles. Samples having 0.1 μm, 0.2 μm and 0.3 μm Fullerene C60 film thicknesses were produced. Morphology and tensile properties of the samples were analysed by AFM (atomic force microscopy) analysis. An uncoated fabric was used as the control sample to compare the tensile properties of the samples. Compared to the uncoated fabric, the coated fabrics showed an increase in tensile strength. As the fullerene film thickness increased, a decrease in tensile properties was also observed. The decrease observed in the tensile properties for the C60 coated fabric samples might be caused by the coarser particles accumulating on the fabric surface as the thickness increased.
Transfer Alignment for MEMS Integrated Navigation System Based on H∞ Filter
Authors: Zhang Xing Zhi , He Kun Peng , Wang Chen Yang
Published: January 2014

The transfer alignment of strapdown inertial units were proposed that use the H filter to estimate the misalignment of the slave INS (inertial navigation system) relative to the master INS. Characteristics of the H filter in transfer alignment were studied in detail by checking digital simulation results obtained by using the H and Kalman filters. The results shows that the misalignment angle obtained with the H filter converge faster and closer to the exact values than do those obtained with the Kalman filter. The H filter is more robust than the Kalman filter in transfer alignment for MEMS integrated navigation system.
Development and Application of a PID Auto-Tuning Method to a CNC Servo Control
Authors: Liang Ji Min , Zhou Xue Feng , Sun Ke Zheng , Chen Xian Shuai
Published: January 2014

This paper investigates a practical implementation of a relay feedback based PID auto-tuning method for CNC servo motor. Firstly, the hardware architecture of the CNC system is introduced and experimental process is presented. And then the critical point information is obtained from steady oscillations of encoder output by Ziegler-Nichols tuning rules. Finally, control experiments that based on default PID parameters and auto-tune PID parameters have been conducted and the results show that system performances, such as velocity responses and position following error have been much improved.
A Transportation Guidance System Based on Data Mining and GABP
Authors: Li Zhu Hao , Guan Wei
Published: January 2014

This paper researches a transportation guidance system based on data mining technology. Data mining may be available for providing reliable decision base based on existing mass data and give proper guiding strategy in consideration of real road condition.The guiding result will become more efficient provided that GABP Neural Network Forecast is mixed in the real road condition.
Sensorless Control of PMSM Based on Sliding Mode Observer
Authors: Zhou Shuo , Wang Da Zhi , Gao Qing Zhong
Published: January 2014

A novel sliding mode observer(SMO) of PMSM(permanent magnetic synchronous motor) was presented, which estimated the rotor position and angular velocity accurately.The proposed SMO substitutes a sigmoid function for the conventional signum function with a variable boundary layer which is changed according to the rotational velocity.The dependence to motor parameters and chattering effects that is commonly found in signum function using for the switching function were overcome.By combining the model of PMSM under d-q coordinate,the convergence condition of observer was deduced.The convergence was verified by the Lyapunov theory.Simulation results show that the rotor position and velocity can be observed accurately,and also has good dynamic performance and robustness.
Study on Reactive Support of Distributed Generation
Authors: Fang Chen , Xu Ting Ting , Liu Jin Song , Chen Jia , Lu Zhi Gang
Published: January 2014

As for renewable energy, the distributed generation (DG) technology has a promising outlook and is getting more concern in worldwide. In order to ensure the distribution network operate on the best performance when accessed by DG, DG must have a good reactive support for the distribution network. In this paper, the models of different DGs reactive power external characteristics are given. And in the modified case of IEEE37, the SVSA program which is developed by Tianjin University are used to analyze the reactive support of different DG. The case study shows that under some certain control strategies and operation conditions, when properly making use of the reactive support, the distribution network has a better performance in power loss and also has a positive impact on the stability and economical operation. Compare with traditional reactive power compensation device, the DG performs better in overall network voltage and economical operation of network.
Facile and Green Method for Fabrication of Polystyrene/Multi-Walled Carbon Nanotube Composites with Covalent Functionalization
Authors: Tu Xi , Chen Xian Hong , Hou Qing Lin
Published: January 2014

Polystyrene (PS) nanoparticles/multi-walled carbon nanotube (MWCNT) composites were prepared by emulsion polymerization in the presence of styryl-modified MWCNTs. The Fourier transform infrared spectroscopy and scanning electron microscope confirm the effectiveness of functionalization of MWCNTs and the strong interactions between MWCNTs and PS nanoparticles. The results of transmission electron microscopes further support the covalent functionalization process.
Dynamic Analysis of Crank-Connecting Rod-Piston Mechanism of S195 Diesel Engine Based on MATLAB
Authors: Li Xin Hua , Zhang Xiao Ming , Guo Xiao Jie
Published: January 2014

The inertial force and torque produced by the crank-rod mechanism is an important factor of vibration in single-cylinder internal combustion engine. Based on MATLAB software, the analysis model of crank-connecting rod-piston mechanism of S195 diesel engine is established, and the dynamic characteristic parameters of the main parts can be obtained. The results showed that the simulation analysis can get the kinematic and dynamic data of the mechanism conveniently and accurately, which provides a feasible advanced method for the design and development of diesel engine.
Theoretical Analysis on Resistance-Temperature Characteristic of Ni/HCl-PANI Composites
Authors: Qiu Sui Yu , Yang Zhi Wei , Qiu Hong
Published: January 2014

Ni/HCl-PANI composites were formed by depositing Ni films on HCl-doped polyaniline (HCl-PANI) substrates. A simple parallel resistor model is used to analyze the resistance-temperature (R-T) characteristic of the composite within 30-300 K. The theoretical analysis reveals that the composite exhibits a metal-semiconductor transition within a certain thickness of the Ni film or the HCl-PANI substrate. The composite shows a semiconducting behavior at temperatures over the transition temperature and a metallic conduction behavior at temperatures below the transition temperature. The transition temperature increases with increasing Ni film thickness whereas it decreases with increasing HCl-PANI substrate thickness. When the Ni film thickness exceeds its upper limit or the HCl-PANI substrate thickness is below its lower limit, the composite only shows the metallic R-T characteristic. When the HCl-PANI substrate thickness exceeds its upper limit, the composite only exhibits the semicoducting R-T characteristic.
Effect of Pre-Wetting Super-Light Aggregate Reinforced Aerated Concrete
Authors: Dong Jian , Liu Xin Quan , Zhang Ming , Guo Kai
Published: January 2014

In this study, the effect of pre-wetting super-light aggregate on the microstructure of the aerated concrete was discussed. The experimental results show that: using Scanning electron microscopy to magnify the interface between mortar and aggregate in aerated concrete to 200 times their normal size, the pro-wet treatment densifies the interface,and to 20000 times,fibrous CSH gel and lamellar tobermorite interweave each other and form very pre-pressing structure on the surfaces .
Characterization of Recycled Cemented Carbide and the Raw Materials
Authors: Li Shao Xiang , Wang Zhao Feng , Li Wen Qian , Zhou Gui Zhong , Liu Guang Zhao
Published: January 2014

Nowadays, a large quantity of cemented carbide is being consumed, and the amount of scrap cemented carbide is increasing year by year. In this paper, crystal morphology, element content and phase structure of the recycled cobalt powder as well as recycled tungsten carbide powder were characterized by SEM, EDS and XRD. Hardness of the prepared W-Co alloy using recycled cobalt powder and recycled tungsten carbide powder as the raw materials was tested by Rockwell apparatus. Through analysis of these results, the existing problems in recycling of scrap cemented carbide emerged. As for recycling of scrap cemented carbide, the research results can provide theoretical basis for improvement of recycling technology and process control technology.
Thermodynamic Optimization Design of Casting Mg-Zn-Cu Alloy
Authors: Xu Liang Ge , Li Xiao Xian , Ye Jie , Ji Xia , Qiu Hong , Luo Jing , Yang Hui Guang
Published: January 2014

The variation of the main strengthening phase MgZn2of Mg-Zn-Cu alloy amount and crystallization temperature with Zn and Cu content were studied by thermodynamic calculation using FactSage software and magnesium alloy database, and according to the thermodynamic optimization results we melted Mg-6Zn-1.5Cu.We researched the structure of the experimental alloy as-cast after peak aging at 160 °Caging by TEM, XRD and DSC. The results showed that the experimental alloy aged at 160 °C was about 15% higher than Mg-6Zn binary alloy, and peak aging organization's main strengthening phase is more evenly distributed, the higher density of -MgZn2phase. Cu is added to improve the phenomenon of the Mg-Zn binary alloy aged structure distribution uneven precipitation of low density as well as easy to averaging.
A Method for Welding Deviation Acquisition Based on Magnetic-Control Arc Sensing for Multi-Pass Welding
Authors: Hong Yu Xiang , Hong Bo , Liu Jian , Li Xiang Wen
Published: January 2014

In order to solve the problems of seam tracking for automation welding of large welding structure, this paper has respectively built mathematic model for length of magnetic-control arc according to two typical forms of weld pass in multi-pass welding for V-groove seam. By using Matlab/Simulink to analyze the transformation discipline of welding currents, a method for deviation acquisition based on magnetic-control arc sensing for multi-pass welding is proposed. Welding experiments demonstrates that the method proposed can effectively resolve the dilemma of deviation acquisition during multi-pass welding for thick plates with V-groove seam.
Characterization of Calcium Phosphate with an Anodic TiO2 Nanotube Layer on Titanium Screw for Biomedical Application
Authors: Yan Ya Jing , Huang Yong , Ding Qiong Qiong , Pang Xiao Feng
Published: January 2014

The present paper reports a novel solution to develop a calcium phosphates (CaPs) coating with an anodic nanotubular TiO2layer on titanium screw by electrochemical disposition (ECD). The elemental composition of coatings was examined by energy dispersive spectroscopy (EDS), the surface mopholoy was characterized with scanning electron microscopy (SEM), and the functional groups and crystalline phase were analyzed using Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Furthermore, the bioactivity was tested by immersion in simulated body fluid (SBF) for 7 days. The results showed that a nanotubular TiO2layer was established which has about 100 mm diameter and the calcium phosphate coatings have higher bioactivity and porosity compared with uncoated titanium screws, which make the coating more conductive to cell adhesion. Using alkaline treatment, the calcium phosphate coating could transform into hydroxyapatite (HAp), making the coating closer to the biological complement. This provides a valuable tool for biomedical applications.
Identification of Unknown Sediment in Water-Reducer
Authors: Si Sun Yi , Chen Bing Hui , Zhang Wen , Qian Jia Wei , Ding Guo Qing
Published: January 2014

As urbanization level of our country improves constantly, urban population will increase dramatically. Then industrial and civil buildings and other facilities will be multiplied, which leads to use plenty of high-performance concrete materials. i.e. China's building materials, especially the use of concrete will be increased year by year[. And the chemical admixtures is an essential fifth component of concrete[2-. It has been nearly 50 years since the chemical admixtures were researched,expolited and used in large scale[.But the water reducer are used most widely, its characteristics is to reduce the water consumption of concrete, and minimize the porosity of concrete. Thereby which enhances its intensity and durability.
Ultraviolet Photodetectors Based on MgZnO Thin Films
Authors: Zhao Man , Jiang Da Yong , Liu Wen Jing , Yang Guang , Li De Jun
Published: January 2014

In recent years, MgZnO alloy becomes one of the most suitable materials for the fabrication of ultraviolet detectors. In this paper, we have fabricated three metal semiconductor metal (MSM) photodetectors on Mg0.42Zn0.58O film grown by radio frequency magnetron sputtering. The interdigital electrodes are 500 um long and 5 um wide with an interelectrode spacing 2, 5 and 10 um, respectively. The structural, electrical and optical properties of epilayers were characterized by various techniques. At 5 V bias, a peak responsivity of 1.09 mA/W was achieved at 283 nm for the device with 2 um interelectrode spacing. The peak responsivity at 283 nm increased with the reduction of the finger pitch for three devices and the ultraviolet-visible rejection ratio (R283 nm/R400 nm) was more than one order of magnitude at 5 V bias.
Research on Mechanism in the SNCR DeNox Process
Authors: Xu Shun Sheng , Deng Bo , Li Luo Jun , Huang Ri Sheng
Published: January 2014

The reaction mechanism of selective non-catalytic reduction on NH3-NO has been investigated experimentally in high temperature. The result has shown several basic conclusions: a) The reaction of NH3-NO is self-sustaining; b) oxygen must be involved in the reaction process of NH3-NO; c) Denitration reaction of NH3-NO in the temperature range centered at T1250K; d) the temperature window for NO removal moves to lower temperature, with adding hydrogen (H2) or hydrogen peroxide (H2O2) as well keeping the width of the window unaltered; e) the reaction is not explosive, and it takes place relatively smoothly in the course of approximately 0.1 sec.
High-Performance Indium Oxide Thin Film Transistor with ITO Source/Drain Electrodes Fabricated by Reactive Sputtering
Authors: Zhang Xin An , Yu Xian Kun , Zhai Jun Xia , Jiao Yang , Ding Ling Hong , Zhang Wei Feng
Published: January 2014

We report on the fabrication of bottom gate thin film transistors with indium oxide (In2O3) thin films as the active channel layers. The films were deposited on SiO2/Si substrate at room temperature by direct current (DC) magnetron sputtering. The ITO films were used as source and drain electrodes. The In2O3 films were structurally characterized by x-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The results revealed that the films were amorphous in nature. Electrical measurement has revealed that the devices operate as an n-channel enhancement mode and exhibit an on/off ratio of 106. The threshold voltage is-3V and the channel mobility on the order of 22.3 cm2/Vs has been determined.
Zinc Oxide Production Technology of Distillation Twice Based on Scrap Miscellaneous Zinc Materials
Authors: Liu Qun Shan , Yan Jun Xia
Published: January 2014

By using scrap miscellaneouszinc materialas raw materials, a new technology with the help of two distillationsby fire method to produce zinc oxide was invented.The scrap miscellaneous zinc materialshave complex sources, containing dust, stone, iron and steel parts and other impurities, and zinc content is more than 15% over a wide range. The presence of zinc is in the form of pure metallic state, alloy state and oxidation state.Distillation process has two steps, the primary for removing the principal impurities and the second for zinc oxide purification. With less investment, low cost, simple equipment, easy operation, environmental protection and other advantages, this method is fit for production of high-purity zinc oxide and can also be used for the production of nanoscale high purity zinc oxide.
Research on Optical Feature Recognition Technology of Multiple Micro-Holes
Authors: Cai Hui Tao , Liu Yong
Published: January 2014

A rapid quality detection system for multiple micro-holes fabricated by electrochemical machining (ECM) is proposed by studying on the optical features of multiple micro-holes. First, the edge of multiple micro-holes is detected exactly with the digital image processing techniques. Second, the multiple micro-holes are recognized through image skeleton extraction and region segmentation algorithm. Then, the least square circle fit arithmetic; the new roundness measurement algorithm and the surface roughness measurement method are synthetically used in the processing of geometric feature recognition of each micro hole. Finally, the practical results prove that the rapid quality detection system is provided with a fast detection speed and high precision for meeting the quality inspection requirement of multiple micro-holes.
Principles and Implementations of Three-Level Control SCADA System for Oil and Gas Pipelines
Authors: Xu Run , Wang Chang Zheng , Hu Tao
Published: January 2014

Based on the long distance pipeline SCADA system in the three level (the dispatch center, station and local) control permissions needed to resolve problem, analyzed, and combining the practical application of a feasible scheme is given. For the principle and implementation of the scheme in detail.
Fuzzy Control of Z-Source PV Grid-Connected Using Constant Frequency Hysteresis Comparison
Authors: Chen Yan , Zheng Yong
Published: January 2014

In order to achieve high efficiency of photovoltaic grid-connected system, the constant frequency hysteresis control is introduced into the Z-source grid-connected control, and realized by the fuzzy control technology. Because of the particularity of Z-source shoot-through working state, analyses shoot-through boosting characteristic of Z-source inverter and voltage control performance of DC-link, get the control signal of shoot-through vector. Add the shoot-through vector into hysteresis grid-connected control by using the logical analysis. This method has the advantages of fast dynamic response, high tracking accuracy and stability, and to overcome the traditional hysteresis control filter design is difficult. The simulation results prove the correctness of the theoretical analysis.