bluuebunny/crossref_metadata_2025 huggingface dataset:
Research of Data Model in Engineering Flight Simulation Platform Based on Meta-Data
Authors: Liu Jin Xin , Xu Hong , Shen Wei Qun
Published: June 2013

The research of data model is a key technology in engineering flight simulation platform. This work analyses the engineering flight simulation platform’s present research situation and specific demands. Then we propose a data model in engineering flight simulation platform based on meta-data. The model shields the heterogeneity of system data and can build association between system data. At last, we finished the data management module in engineering flight simulation platform based on the model mentioned above, which proved that this data model has greater significance in realizing generality and expandability in engineering flight simulation platform.
A Mapping Simulation of Code Generation for Partitioned System
Authors: Chen Ya Qin , Ma Dian Fu , Wang Ying , Zhao Xian Qi
Published: June 2013

It is crucial for real-time embedded system to design and verify for a little fault may lead to a catastrophe. Architecture Analysis and Design Language (AADL) is a modeling language used to design and analysis the architecture of real-time embedded system based on Model Driven Architecture (MDA). Code generation of AADL model to codes running on the Real-time Operation System can avoid hand-writing mistakes and improve the efficiency of development. Partitioning is introduced into embedded system to control fault transmission. This paper presents a mapping approach to generate codes from AADL model for partitioned system, and the generated codes which include configuration codes and C codes will run on a partitioned platform.
Numerical Simulation of Electrohydrodynamic (EHD) Atomization in the Cone-Jet Mode
Authors: Najjaran Abdolkarim , Ebrahimi Reza , Rahmanpoor Morteza , Najjaran Ahmad
Published: June 2013

Electrohydrodynamic (EHD) has been applied in many areas, such as EHD atomization, EHD enhanced heat transfer, EHD pump, electrospray nanotechnology, etc. EHD atomization is a promising materials deposition technique as it allows uniform and regular deposition, and offers a range of other advantages, such as low cost compared with other current techniques, easy set-up, high deposition rate, and ambient temperature. Simulation is carried out using ANSYS FLUENT system. The approach in this work was to simultaneously solve the coupled (EHD) and electrostatic equations. The fields of velocities and pressure, as well as electric characteristics of EHD flows, are calculated. The model does not include a droplet break-up model.
Research and Implementation of Bluetooth Data Transmission Algorithm Based on Android
Authors: Zhang Zhi Guo , Tang Ming Hao
Published: June 2013

With more frequent information exchange between the completely open mobile Android platform and other embedded platforms, the needed for information integrity and real-time's requirements are more stringent. Now the Bluetooth communication data algorithm on the Android platform has some defects while realizing communication data's real-time capacity and operability. Based on the research of Android Bluetooth devices and non-peer platform for Bluetooth communication, an array-list timestamp combination algorithm was put forward (was proposed) to solve the uncompetition of data frames and data loss phenomenon when the Android Bluetooth devices receive data frames during communication process.
Evaluation of CAD Model Manipulation in Desktop and Multimodal Immersive Interface
Authors: Gîrbacia Florin
Published: June 2013

In this paper is presented an evaluation study regarding the manipulation of 3D CAD models using multimodal Virtual Reality (VR) interface and traditional desktop environment. A multimodal interface based on VR technologies that offers direct access to the space model by using several sensorial channels (visual, tactile, verbal) is described. Users can manipulate 3D objects using 6DOF tracking device, gestures and visualize the design status in an immersive CAVE - like system. The results of the evaluation study illustrate that using VR technologies as an alternative to replace WIMP CAD software interface is viable and brings more advantages.
CAD Analysis Applied to Self-Centering Compliant Grippers
Authors: Ganatsios Stergios , Spanu Alina , Dontu Octavian , Besnea Daniel , Gheorghe Gheorghe I.
Published: June 2013

The self centering grasping mechanisms aim to improve the positioning accuracy of the object movement. The paper presents the FEM method applied to such mechanism using compliant joints with elastic properties. We have studied the tensions and displacements for the three dimensional model and the experimental results achieved the goal of our work.
Analysis of Thermal Shock and Stress with Infrared Optical Domes
Authors: Gao You Tang , Liu Shuo , Xu Yuan
Published: June 2013

The development of infrared optical materials is always closely related to the research and exploration of material science. The infrared optical domes bears shock and produces stress when the infrared optical domes mounted on the missile moving at a high speed is shocked by high temperature. According to aerodynamics theory and thermo shock theory, the surge current will be transferred to optical parts through holding up layer and warms the surface of optical parts when infrared optical parts are shocked by high temperature. A compress stress is formed on the hot external surface of optical parts forms and a tension stress is formed on the internal surface or optical parts under the circumstance of the edge of optical parts being fixed. The windows of optical parts become curvature radius of lens with the function of pressure difference which can cause aberration change. The brittle fracture of material will be caused if peak stress is beyond the strength which is permitted for infrared materials. Therefore, limits to design of windows thickness is proposed in this paper.
Enthalpy Calculation of Flue Gas from Pressurized Oxy-Coal Combustion Based on Real Gases
Authors: Dong Jing Lan , Yan Wei Ping , Zhang Chao Hui
Published: June 2013

The oxy-fuel combustion is recognizing one of the most promising available technologies that zero emission accomplishment may be in the offing. With coal burned at the pressure of 6MPa and oxygen-enriched conditions, the high temperature and high pressure gaseous combustion product is composed of mainly CO2 and water-vapor that belonging to real gases. However, once lauded as classic approach of resolving fuel gas enthalpy calculation pertaining to ideal gas at atmospheric pressure was restrained by pressure limitations. In this paper, the flue gas was assumed as an ideal mixture of real gases system, and the equations for calculating the flue gas enthalpy were derived by using deviation function method based on the virial equation. Consequently, comparing with the results simulated by the flow-sheet simulation 2éÕÒ: software" software-ASPEN PLUS, it showed that calculation method on the basis of virial equation appears to be a reasonable enthalpy values for the pressurized oxygen-enriched coal combustion.
Structure and Performance of Ti/TiN/PbO2 Electrodes with Plasma-Sprayed TiN Interlayer
Authors: Huang Amin , Zhang Jian Xin , Wu Xiao Wen , Wang Yang
Published: June 2013

TiN coating as an interlayer in Ti/TiN/PbO2 electrode and PbO2 catalytic layer were fabricated by reactive plasma spray and electro-deposition, respectively. It is shown that because of good effect of the TiN interlayer, the Ti/TiN/PbO2 electrode exhibits a higher oxygen evolution potential and much improved accelerated life compared with the Ti/PbO2 electrode.
An Experimental Method to Determine Circumferential Chamfered Position for a Langevin-Type Stator
Authors: Wang Rui Xia , Jin Long , Xu Zhi Ke , Hu Min Qiang
Published: June 2013

A langevin-type ultrasonic motor works using two orthogonal bending vibration modes. However, due to the influence of machining error, heterogeneous materials, especially the screw stress unevenness along the circumferential direction, the modal frequencies of two vibration modes are different, which will affect motor performance. Earlier research only deals with the axial position to chamfer to reduce the frequency difference, and think vibration direction consistent with excitation direction. While experimental results show that these two directions are generally different. By using Finite Element Method (FEM), a square-base stator is simulated, and the relationship is obtained qualitatively between the extreme value amplitude point and the extreme value bending moment of inertia of the stator. At last, an experimental method is presented to determine the maximum vibration amplitude position of a cylinder ultrasonic motor when the excitation angle changes in the range (-90,90].
The Transmission Characteristics of Lord Mode and Analysis on Section Dimension Design in Rectangle Wave Guide
Authors: Shao Yi Quan , Zhang Yun Bo
Published: June 2013

In order to design the section size of a rectangular waveguide, this paper gives a new method to design the section size of a rectangular waveguide and the result obtained has important reference value for the design and research of sectional dimension. Based on the wave equation of electromagnetic wave, graphic method is employed to determine the transmission condition of fundamental mode in rectangular waveguide. We analyzed the power capacity and attenuation characteristics when the rectangular waveguide transmits with single-mode, and finally obtain the guidance condition for the power capacity reaches the maximum and the attenuation reaches the minimum in the rectangular waveguide.
Effect of Particles Alignment Anisotropy on the Fatigue Behaviors of Extruded Al2O3/2124 Aluminum Alloy Composites
Authors: Emara M.M.
Published: June 2013

Alignment of reinforcement particles was observed to affect the fatigue behaviors of extruded composites strongly. Micro-structure characterization showed a preferred orientation of the reinforcement particles parallel to the extrusion axis. As the reinforcement volume fraction increase, to some calculated values, the fatigue life and strength of the composite materials increases although the degree of particles alignment decreased.
The Comparison and Analysis on Harmonic Suppression of EV Charging Station
Authors: Sun Yu Tian , Sun Yong , Du Xue Long , Yuan Hong , Qi Cheng , Liu Zhi Zhen
Published: June 2013

In order to propose reasonable method of harmonic suppression for EV charging station, three methods that are 6-pulse rectifier with APF, 12-pulse rectifier, PWM rectifiers are analyzed and compared. Firstly,the corresponding simulation model of charger and charging station are built based on the principle of EV charger and the main method of harmonic suppression. Then the harmonic content and power factor for different simulation model are researched. Meanwhile, the advantages and disadvantages of different simulation model are studied according to the results of simulation, the use of performance and economy. At last, the improvement measure and development direction for three methods are proposed.
A New High Frequency Transformer PV Grid-Connected Inverter
Authors: Geng Ye , Gong Li , Chen Y.B.
Published: June 2013

This paper focuses a new high frequency transformer inverter technology for connecting photovoltaic (PV) panels to a single-phase grid. The information provided includes the inverter topology, control diagrams, and simulation models. The results show that the performance of the proposed inverter meets the grid connection requirements.
The Simulative Research of Three-Phase PV Grid-Connected Control System Based on SVPWM Inverter
Authors: Cheng Qi Ming , Hu Xiao Qing , Wu Kai , Bai Yuan Fei
Published: June 2013

The PV grid-connected control system is mainly related to a few key issues that are characteristics of photovoltaic cells, maximum power point tracking and grid-connected control of three-phase inverter. In this paper, simulation analysis and study of the three-phase grid-connected PV system control strategy. The control strategy of the three-phase PV grid-connected system is analyzed and studied by simulative experiment in this paper. First, a mathematical model of solar cells is established, then the algorithms based on perturb & observe to track maximum power point is used; Secondly, the structure of three-phase PV grid-connected system is introduced, and the space vector SVPWM controller is used to control the grid-connected inverter; Finally, the simulative results on Matlab/Simulink software show that SVPWM inverter control strategy is superior to the traditional hysteresis current inverter control strategy, which illustrates the reliability and superiority of SVPWM control strategy.
Modeling of Conducted EMI in Electric Vehicle Motor Drive System
Authors: Yang Yong Ming , Peng He Meng , Wang Quan Di
Published: June 2013

In this paper, a method for conducted electromagnetic interference (EMI) prediction in Electric Vehicle motor drive system based on components’ circuit models is presented. Firstly, the characteristics of the components are analyzed and the equivalent circuits are drew; then, the parasitic parameters of the electromagnetic device are extracted by the measurement, analytical solution and finite element method (FEM); and finally, the circuit model of the whole motor drive system in high frequency range is established. This model is verified by the measurement and simulation results in the frequency domain.
The Influence on Lightning Invasion Waves from UHV Substation Bus Arresters
Authors: Zhou Yu Sheng , Xiang Jun , Zheng Jian Wu , Zeng Long
Published: June 2013

Ultra high voltage (UHV) AC transmission is a trend in the modern transmission technology development, the UHV substation is the center in the power system. The lightning invasion waves pose a serious threat to the safety of the substation, therefore it is very important to improve the features of the substation anti-lightning. The arresters of UHV substation bus sides, the role of restraining the lighting invasion waves on main transformer have been researched. Applying ATP-EMTP, a simulation model of the lightning over-voltage invasion substation along the double-circuit self-reliance transmission line was built. Whether and how the number of arresters influences the lightning waves were analyzed comparatively. The maximum amplitude of the lightning current can be reduced when the arresters installed in the bus side, and the protective effect of the transformer can be improved effectively.
Shrinkage Cracking Ring Tests of Concrete with Compound Mineral Admixtures
Authors: Li Yun Feng , Wang Quan Xiang , Guo Hua Xun
Published: June 2013

Shrinkage cracking is the direct cause which leads to the deterioration of durability and integrity of concrete. In this paper, ring-test methods are used to study the early age cracking characterization of compound mineral admixtures concrete which includes steel slag, blast furnace slag and fly ash. The effect of compound admixtures on cracking characterization of concrete is discussed, restraint stress caused by concrete shrinkage and cracking age are analyzed. Through the comprehensive consideration of the free shrinkage strain, creep, restriction factors on the effect of the cracking of concrete specimens. The results show that suitable proportion mineral admixtures can be used to reduce cracking in concrete. The risk of cracking can be estimated for compound admixtures concrete, so that it will improve the durability of concrete structures.
Methods of Power Quality Economic Cost Analyses for End-Users
Authors: Zhen Xiao Chen , Tao Shun , Xiao Xiang Ning , Zhang Xi Yu , Liu Yu
Published: June 2013

Power quality problems could cause enormous amounts of economic cost to electricity consumers. Taking voltage dips as an example, this paper presents a general overview of methods to quantify economic impact of power quality problems. It also presents in detail several ways how to collect power quality economic data. At last, suggestions on how such researches could be done in China are represented.
Research of Intelligent Substation Condition Monitoring Based on the Neural Network
Authors: Chai Da Peng , Xue Qiang Qiang , Wang Ling Mei , Zhao Xing Yong
Published: June 2013

The substation electric power equipment condition monitoring is the basis of intelligent substation. This paper analyzes the composition of the substation electric power equipment condition monitoring system and monitoring parameters, and with the transformer condition monitoring as an example, this paper proposes fault diagnosis methods of electric power equipment using artificial neural network(ANN).
Research on a Coal Gangue Identification Device
Authors: Zheng Gang Feng , Zha Jia Wei , Liu Hai Zeng , Li Ling
Published: June 2013

The paper designed a coal gangue identification device. It firstly proposed to use the guide groove to guide, grayscale sensor to recognize and the corresponding mechanical actuators to realize automatic separation of coal and waste rocks. Compared with other separation device, it firstly put forward solutions to realize the linear arrangement of materials, and solve the problem of removing the soft sundry after hand sorting. It has advantages of simple structure, reliable operation and so on.
Study on Calibration Test of Height Adjusting System for Automobile Headlight Based on Uniform Design Experiment
Authors: Ma Shi Dian , Jiang Hao Bin , Han Mu
Published: June 2013

This paper describes the new Calibration test method of Height Adjusting System for Automobile High Lighting. Come up with the problem of working efficiency for Calibration test, study the parameters tuning method of Height Adjusting System for High Lighting based on uniform design experiment. Analyze experimental data by using direct analysis method and range analysis method, find the factor which affects the high lightings height most. Verify the result of orthogonal experiment on the test platform. The test shows that the new Calibration test method is reliable and efficient.
Research of Working State Parameter of Road Header Based on Data Recorder
Authors: Yang Jian Jian , Jiang Hai , Xi Ran , Xue Guang Hui , Wu Miao
Published: June 2013

Working state parameters of Road Header is the basis on analysis of field performance of a road header and improving its design. This paper studied the development of data recorder, and by tracing the long time recording state parameters of road header under the coal mine, including the voltage, current, temperature and other information of cutting motor. Calculate the cutting motor power signal and take it as random load signal, through the statistical analysis of the cutting motor operating parameters determine road header field work load distribution for its performance, provides a basis for the optimization.
Modification of the Dynamic Characteristics of the Tool Tip by Adding Mass on Tool–Tool Holder System
Authors: Yang Shen , Chen Yong Jie , Chen Chen , Li Ning
Published: June 2013

In this paper, a torus is designed as an adding mass to modify the dynamic characteristics of the tool-holder system in free boundary condition and in fixing boundary condition. The torus is fixed on the holder of a given face milling cutter, which may change the mass distribution and the stiffness distribution of the system, to adjust the frequency and damping ratio of the tool tip. Although the dynamic characteristics of the tool tip are significantly influenced by holder-spindle interface, the influence of the tool-holder can’t be neglected. In this attempt, by adding mass on the tool holder, the first order frequency decreased by 37% in free boundary condition and 6.7% in fixing boundary condition. The first damping radio increased by 48% in free boundary condition and 4.5% in fixing boundary condition. Chatter suppression is verified in the cutting process by adding mass on the holder.
Compensation Research of Engine Oil Pressure Sensor Based on MEMS
Authors: Yang Sheng Bing , Wang Shuai , Su Yan Xia , Xu Feng , Li Zhen Zhen
Published: June 2013

The engine lubrication system plays an important role in the engine working process. Engine electronic oil pressure sensor based on piezoresistor pressure sensor MEMS with contactless measure technology is designed in this paper. This sensor includes a signal disposal chip which provides zero point pressure compensation, temperature compensation and sensitivity compensation and a chip which is used to adjust the duty cycle according to the output voltage of the signal disposal chip. The experiments show that the Engine electronic oil pressure sensor works well with excellent characteristic.
The Auxiliary Equipments of the Machine-Tools. Pneumatic Systems
Authors: Prodan Dan , Bucuresteanu Anca , Balan Emilia
Published: June 2013

This paperwork presents the most frequent applications of the pneumatic drives on universal machine-tools, particularly on CNC machine-tools. It also presents modern calculation and verification methods with simulation software.
Experiment Study on Thermal Ignition Delay Period of Gasoline-Air Mixture
Authors: Ou Yi Hong , Qian Hai Bing , Wu Ying , Du Yang , Wang Dong , Jiang Xing Sheng
Published: June 2013

In this paper, the thermal ignition delay period of the gasoline-air mixture under the condition of high temperature heat source and temperature-rising heat source in cave depots has been studied using experiment methods. The rules, scopes, and mechanism of thermal ignition delay period are got. It is found that: there is different delay period scope in different ignition model. The delay period for thermal explosion is the shortest, for thermal deflagration, the delay period is longer than that for explosion, usually seconds to a few hundred of seconds.The mechanism of delay period is unification of chemical kinetics and thermodynamics before ignition.
Research Status and Development Trend of Electromagnetic Defect Detection Logging
Authors: Yan Zheng Guo , Zhao Lin
Published: June 2013

Electromagnetic defect detection logging can measure multilayer pipeline and provide the information of casing defect and the remaining metal thickness, is the hot spot of the casing defect detection technology. This paper elaborates the advantages and disadvantages of electromagnetic defect detection logging and the present instrument situation, compares technical indexes of several new electromagnetic casing defect detection instruments, summarizes the latest research status, points out the problems existed in current researches and the development trend combining with the instrument index and theory research.
Research on the Exposure Assessment of the Cadmium Ion in Textiles
Authors: Huang Guo Zhong , Bu Hai Chao , Sun Si Heng , Wang Chao , Chen Ai Ji
Published: June 2013

The concentration of cadmium ion in textiles was measured with the method mentioned in Oeko-Tex Standard 100 requirements and GB/T 2912.1-1998 standard. The results show that the measured concentration of cadmium ion fits the normal distribution well after resampled by the method of bootstrap. In the paper, the exposure routine through skin is defined as the object of study, and calculating model of cadmium ion exposure in textiles in the condition of exposure simulation is established. Effective concentration is defined as the confidence limit (UCL) when the confidence level reaches to 95%, and the amount of cadmium exposure to human through skin is obtained, which is 3.2510-4μg/(kg·d).
Measuring and Analyzing the Bevel Gears with Octoid I Teething
Authors: Faluvegi Erzsebet , Mate Csaba Zoltan , Cobliş Cătălin Ionel , Cristea Luciana
Published: June 2013

This paper presents the error determination on the teeths flanks of the bevel gears with straight teething using the theoretical profile. It summarizes the state-of-the-art of the profile verification. A coordinate measuring machine, type MITUTOYO Crista Plus was used for realizing the measurements. The theoretical profile is built by theoretical equations to identify the errors. The error distribution is presented by overlapping the suitable surfaces. So the bevel gears with straight teething can be evaluated in terms of the profile tolerance.
Development of High-Speed Transmission Error Dynamic Detection System Based on NIOS-II and USB
Authors: Zheng Yong , Chen Yan , Zhu Ge
Published: June 2013

This paper proposes a high-speed transmission error (TE) dynamic detection system based on NIOS-II and USB. The detection system is in the realization of data acquisition on a FPGA chip, and sends the collected data to specialized data transmission circuit by the chip NIOS-II CPU core, the data transmission circuit composed of USB2.0 main control chip and FIFO chip, which can realize the two-direction communication between data acquisition circuit and PC, so as to realize the TE detection of high-speed side.
Investigation of Engine Based Electromagnetic Interference for Electric Vehicular Communications Systems
Authors: Hsu Guan Wen , Liao Kuan Yuen , Yen Kai Wei , Chen Jian Ting , Hung Guo Feng , Li Chih Peng
Published: June 2013

The transient effect of electromagnetic interference (EMI) produced by electronic equipments has been extensively studied. However, for the electric vehicles, speed changing also introduces considerable amount of interference. In this paper, we study the EMI influences, which include the interferences caused by the electronic switch and the vehicular engine, on the electric vehicular communications systems. The transmission quality of various standards is investigated, including FlexRay, and Control Area Network (CAN).
Fault Localization of Analog Circuit with Small Sample Using SVM and AIS Methods
Authors: Wu Xiong Xue , Guo Chao You
Published: June 2013

Both Support Vector Machines (SVM) and Artificial Immune Systems (AIS) are by far effective on faults localization of analogue circuits for small samples. In this paper, both a selective SVM ensemble based on clustering Algorithm and a new AIS based on real-valued NS (RNS) algorithm are applied to the fault diagnosis and their effects are evaluated. The fault diagnosis experiments on a continuous-time state-variable filter circuit show that the fault diagnosis method based the AIS can obtain high fault localization rate of 95% when only one group samples acted as the training samples and the other method can obtain fault localization rate of 85% when 400 group samples acted as the training samples. So, AIS is a more effective method to fault diagnosis with small samples.
PC104 Interface Recommended for High Speed Data Acquisition Systems
Authors: Purcaru Dorina , Gordan Cornelia , Reiz Romulus , Purcaru Anca
Published: June 2013

The interface presented in this paper is recommended for high speed data acquisition systems; it performs a synchronized sampling of all common-mode or differential analog inputs with a high sampling rate. This is a low cost interface, entirely controlled by the PC104 CPU. Programmable electronic modules that contain such PC104 interfaces can be found running in the energetic system from Romania; these dedicated equipments perform the analog and digital signal acquisition for monitoring and recording different specific transient events. Some experimental results obtained using the disturbance monitoring device PC-08/104 are also presented in this paper.
Design of Network Power Meter Based on Modbus TCP
Authors: Yan Yin Fa , Zhang Shi Fu , Zhang Yue Hai , Zuo Feng Gang , Li Fa De
Published: June 2013

To implement fast transmation for a large amount of the electricity parameters and timely measurement, the network power meter is developed based on Modbus TCP. The power meter mainly uses 32bits ARM processor STM32F103RBT6, thighly integrated Delta-Segma ADC CS5451 and Ethernet chip W5100 built-in hardwired TCP/IP stack. According to the meter usage on the testing spot, the measurement precision and communication speed of the network power meter can well meet the power industry requirements.
Analysis of Effects of High Temperature on Asphalt Binder
Authors: Cao Phu Cuong , Guo Zhong Yin , Yang Yong Shun , Xue Zhi Chao
Published: June 2013

The study of effects of high temperature on asphalt binder based on viscoelasticity theory will help clarify the influence mechanism of temperature on asphalt binder. Based on the theory of viscoelasticity, the Dynamic Shear Rheology test is used as study method. The objective of this study is to analyze and determine the features of asphalt binder under the effect of high temperature. Meanwhile, study subjects are AH70 asphalt, SBS modified asphalt and MAC modified asphalt. The result indicates that temperature increases have great influence on asphalt binder, which are shown by the variation of parameters quickly decrease. The relationship between temperature and such parameters as complex modulus, storage modulus, loss modulus, complex viscosity, storage viscosity, loss viscosity, rutting resistance parameter and fatigue resistance parameter can be described as regression of power function.
A Novel High-Entropy Alloy AlMgZnSnPbCuMnNi with Low Free Corrosion Potential
Authors: Gan Zhang Hua , Xu Li Ming , Lu Zhi Hong , Zhou Huan Hua , Song Chun Hui , Huang Feng
Published: June 2013

A novel AlMgZnSnPbCuMnNi high entropy alloy was prepared by flux melting in the atmosphere. The microstructure and the electrochemical performances of the as-prepared alloy were studied by electrochemical workstation, X-ray diffraction and scanning electron microscopy. It was found that the free corrosion potential is as low as-1.33V in the 3.5%NaCl solution in spite of the content of Al, Mg and Zn element of the high entropy alloy is far below than that of the traditional zinc or aluminum sacrificial anode material while the free corrosion current density is 2.93×10-5 A/cm2 which is close to the typical aluminum sacrificial anode material.
Synthesis and Thermoelectric Properties of Nano Ca2.6Bi0.4Co4O9 Ceramics
Authors: Chen Zhe , Zhang Li Qiang , Zhao Zhi Ying , Wang Miao Miao , Shan Zhen Hui , Zhang Jun Hong
Published: June 2013

Pure Ca2.6Bi0.4Co4O9Ceramic compound were successfully prepared by adopting a facile solution combustion synthesis method. The crystallinity, morphology were characterized by XRD, FE-SEM. The thermoelectric properties of Bi-doped Ca3Co4O9were also systematically investigated. The results indicate the prepared samples are p-type semiconductors. Both the electrical conductivity and the Seebeck coefficient increase with the increasing of temperatures. Bi substitutions at Ca site enhanced carrier mobility and resulted in a marked increase in thermoelectric properties. The power factor of as-prepared Ca2.6Bi0.4Co4O9sample can reach 2.67×10-4W/mK2at 1000 K. The synthesized Ca2.6Bi0.4Co4O9ceramic materials have potential application for high-temperature thermoelectric energy conversion.
Quantitative Determination on Fiber Textured Materials Derived by Particle Swarm Optimization
Authors: Wang Da Peng , Wang Da Zhi , Wang Fu , Liang Zhi De
Published: June 2013

In this article presented, the maximum entropy method (MEM) assisted by the particle swarm optimization (PSO) algorithm with inertia weight factor was adopted to quantify the volume percentage of crystalline grains corresponding to the {100} fiber texture in high-purity Aluminum foils. The results derived from the inverse pole figures indicate a simpler and more convenient method than the ones derived by the conventional metallographic analysis in comparison, which possess a relative error less than 5% in general. In consideration of the measurement error relating to the metallographic method, this improved quantification is more accurate and acceptable.
The Novel Model of Construct Materials Science and Information Based on Association Rule Mining
Authors: Kuang Guo Fang , Cao Ying Cun
Published: June 2013

The material is used by humans to manufacture the machines, components, devices and other products of substances. Association rules originated in the field of data mining, people use it to find large amounts of data between itemsets of the association. Apriori is a breadth-first algorithm to obtain the support is greater than the minimum support of frequent itemsets by repeatedly scanning the database. This paper presents the construction of materials science and information model based on association rule mining. Experimental data sets prove that the proposed algorithm is effective and reasonable.
Mechanical Industrial Design with Exploration on Practice Training Reform
Authors: Cheng Xian Chun , Jiang Xiao Wei
Published: June 2013

In view of that practice training is of prime importance for mechanical industrial design, the author discusses the present situation of the practice training at home and abroad and analyzes the main problems existing in practice training of mechanical industrial design. And then a series of practice training reform measures are proposed including attaching importance to practice training, increasing the proportion of practice training, innovating practice training content, constructing high level training staff as well as building a whole set of advanced and suitable equipments for practice training.
Design and Study on Mortar Pump's Impeller Based on Bezier and Mechanical Mechanics
Authors: Chen Ming Xin , Tang Ling Feng , Zhou Ge , Dou Zhong Ying , Yang Xiao Li , Du Xiao Yang
Published: June 2013

This article determined the blade profile by using the Bezier Curve.Start with ensuring the blade Angle and the blade profile , this paper designed a new impeller, avoided the appearance of the "S" shape of the blade profile, it ensured the smoothness of the blade profile. Compared with the traditional design of the impeller,Combined with mechanical mechanics software CFX, this article took a numerical calculation and simulation about the impeller and the hydrographic basin , compared the two impeller's residuals, velocity vector,pressure distribution and pressure water room's static pressure distribution,analysed and evaluated the performance of the pump.
Review of Coupled Research for Mechanical Dynamics and Fluid Mechanics of Reciprocating Compressor
Authors: Wu Xiang , Tang Ling Feng
Published: June 2013

Research statuses of mechanical dynamics and fluid mechanics of a reciprocating compressor are reviewed respectively ,along with the presentation of coupled research for these two disciplines of a reciprocating compressor. Analyses for mechanical dynamics are focused on modal analysis and dynamic response analysis. Three methods can be adopted in dynamic response analysis,which are the combination of the formula derivation and finite element method, the combination of multi-rigid-body dynamics and finite element method , and thecombination of multi-flexible body dynamics and finite element method. Analytical models for fluid dynamics include 1-D computationalfluid dynamics model, 2-D computational fluid dynamics model and 3-D computational fluid dynamics model. In addition, limitations of researches for mechanical dynamics and fluid mechanics in a reciprocating compressor are also presented, as well as the prospect for the coupled research of two disciplines.
Alpha Hemihydrate Gypsum Preparationed by Atmospheric Pressure Salt Solution Method Process Route
Authors: Luo Zhao , Han Feng Lan , Huang Xin Hua
Published: June 2013

Alpha Hemihydrate gypsum was prepared through atmospheric pressure salt solution method based on orthogonal experiments. The morphology and phase composition of the samples were observed and analyzed by microscope and X-ray diffractmeter. The major experimental parameters of atmospheric salt solution that prepared alpha half water gypsum were determined. The experiment result indicates that the best speed is 190 R/min, most appropriate water slurry ratio is 3.5:1 and the most suitable reaction time is 4h. In addition, grain was growing longer first in one direction, but when the length of the gains reaches at a certain extent, they will grow in two dimentions to become thick.
Study on Mechanical Mechanics with the Application of an Anti-Aliasing Wavelet Packet Algorithm in Fault Diagnosis of Rotating Machine
Authors: Jiao Xin Tao
Published: June 2013

Shortcomings inhered in the canonical wavelet packet algorithm are explained in detail. An anti-aliasing wavelet packet algorithm is proposed. The method is used to analyze a typical simulation signal and a vibration signal measured from a gear box in wind generator to study the mechanical mechanics. The results show that the improved algorithm is quite effective in overcoming the shortcomings of the canonical method. It can extract the characteristic frequencies of rotating machine precisely and effectively.
Research on the Effects of Pulse-Pressure on Orifice Plate Cavications
Authors: Zhang Zhi Bin , Li Yu Le , Ai Wan Zheng
Published: June 2013

The flows sudden-shrink and sudden-enlarge when passing orifice plate and streamlines dramatically changes. All these lead to flow velocitys pulse, which leads to pressures pulse. The pressures pulse of flow in the vicinity of orifice plate is decided by orifices geometry. The characteristics of flow pressure pulse in the vicinity of orifice plate and its effects on cavications characteristics are researched in this paper. The researches results show that flow pressures pulse around orifice plate have two peak values: one is at the front of orifice; the other is at the vicinity of waters reattachment point, the latters pulse amplitude is larger than the formers. The pressures pulse has important effects on orifice plates cavications. When computing orifices cavitations number, the effects of pulse-pressure should be considered.
Vibration Characteristics Analysis of an Aeroengine Compressor Disc
Authors: Zhao Wei Qiang , Liu Yong Xian
Published: June 2013

This paper introduces the FEA method for vibration characteristics analysis of a certain type of aero-engine compressor disc. Natural modal analysis for dynamical analysis is made and the results can be used as criterion of many dynamics characteristics and further analysis. In this paper, the natural modal of an aero-engine compressor disc with the joint hole fully constrained and in free status is calculated respectively. And the first ten natural frequencies and mode shapes are obtained. Also, vibration characteristics of each natural modal and the corresponding influence on the compressor disc and other structure are discussed. The analysis method and results in this paper can be used for further study on optimal design and vibration safety verification for the compressor disc system.
Research on Lateral Aerodynamic Modeling Based on Relevance Vector Machine
Authors: Gan Xu Sheng , Duanmu Jing Shun , Gao Jian Guo
Published: June 2013

To describe the dynamic characteristics of flight vehicle accurately, a Relevance Vector Machine (RVM) aerodynamic modeling method is proposed. RVM is a learning method which is based on Bayesian learning theory. Compared with Support Vector Machine (SVM), it has the benefits such as probabilistic predictions, sparser model, facilities to select arbitrary basis function and so on. Experimental results show that the proposed method can obtain the aerodynamic model with higher accuracy by less relevance vector. It is also effective and feasible for aerodynamic modeling.
Research on Manufacturing Materials with Footwear Nesting System Based on AutoCAD
Authors: Peng Wen Li , WANG Hai Yan , Lu Lei
Published: June 2013

Footwear nesting were based on its design pattern and manufacturing materials, the results of nesting influence the products quality and cost directly. The characteristics of footwear nesting were summarized based on the correlative theories and technologies of CAN (Computer Aided Nesting) of them. In this paper, the manufacturing materials, pattern identification and moving algorithm were discussed and a footwear nesting system was developed by using VisualLISP based on AutoCAD. The findings were used for reference in the other industries, for example, clothes, plate and furniture and so on.
Parameters Optimization Method for Hot Forming Panels Based on the Crashworthiness and Lightweight
Authors: Hu Ping , Hu Kan
Published: June 2013

This paper studies the parameters optimization of the hot forming panels based on the crashworthiness and lightweight. Combined with hot forming technology, it takes the key structural parameters as the design variables, the positive / bias crashworthiness as the constraint condition, the lightweight body as the design objective, studies the vehicle frontal crash safety. According to the final optimized design, a real car crash tests had been completed and the excellent results shown that the parametric method based on the vehicle crashworthiness is an important guarantee methods to achieve the body structure optimized design.
The Study on Machine Vision Technology of the Detection of Spinneret Micro-Holes Finishing Tool Based on Material Properties
Authors: Feng Pei , Fu Hui , Yang Chong Chang
Published: June 2013

The pear-shaped needle is the finishing tool of spinneret micro-holes. The material of pear-shaped needle is cemented carbide having high wear resistance and toughness. The detection system of pear-shaped needle geometric parameter studied is based on machine vision technology and material properties. The hardware of detection system consists of the IPC, horizontal movement platform, precision rotary axis, the servo motor, image collection card, CCD, industrial lens and LED light source. The software of detection system uses Labview as the development platform. The experiment shows that the detection accuracy of maximum diameter of the pear-shaped needle is up to ± 1μm.
The Study of the Development of the Spinneret Automatic Fine Machine Based on Properties of Mechanical Materials
Authors: Feng Pei , Liu Si Yu , Yang Chong Chang
Published: June 2013

Spinneret automatic fine machine uses the host computer to control machinery to accurately punch pear-shaped needle into each micropores on the spinneret. It can not only remove the burrs formed in the production process of the spinneret, better able to make each of the microporous achieve the required size and dense material properties by punching. It can replace manual operation, improve the finishing efficiency and precision and have solved many defects in manual finishing operation. This paper focuses on the hardware and operating system of the spinneret finishing machine, also tests and verifies various parameters.
Deformation and Failure Features of Surrounding Rock for Combining Mining in Steep and Close Seam
Authors: Zhang Jia Fan , Shi Wei Gang
Published: June 2013

Being closer space among steep and close seams, there always is a mutually destructive influence on adjacent seams while mining arbitrary coal seam within the same mining section, so the scientific mining method of steep and close seam is always the difficult problem to mining workers. Urumchi coalfield developed by Shenhua Xijiang corporation is a very few mine in China and even the world, in which entirely existing and exploiting steep and close seam. There are more than 30 layers of steep seams with different thickness and different distance. Aiming to the steep and close seams in Jiangou coalmine of urumchi mine, the combining mining methods with different mining approaches and different advancing distances were numerically simulated using 2-D and 3-D Finite Element Method, the deformation and failure features of surrounding rock were studied, and then the scientific of combining mine in steep and close seam was investigated.
Different Electrodeposition Behaviors of Ni-Co Binary Coatings in Sulphate and Chloride Baths
Authors: Tian Liang Liang , Su Yong Yao
Published: June 2013

Ni-Co binary coatings with different compositions were electrodeposited from sulphate and chloride baths at room temperature without stirring, respectively. The different codeposition behaviors of the coatings deposited from sulphate and chloride with the same mole ratio of Ni2+/Co2+were studied and anomalous codeposition was investigated in both the sulphate and chloride baths. The Co atom content in the coatings deposited from chloride bath and sulphate bath increases with the mole ratio of Co2+/Ni2+in the baths increasing. The degree of anomalous codeposition in the sulphate bath is higher than that in chloride bath and the possible explanation was discussed. The difference of magnetic properties was also investigated.
Study on Photochromic Materials with Photochromic and Optical Storage Composite Properties of a Novel Diarylethene
Authors: Song Jun Jie , Liu Gang , Li Hui
Published: June 2013

A new unsymmetrical isomeric photochromic diarylethene, 1-[2-methyl-3-benzothiophen-2-[2-methyl-5-(10-phenanthrenyl)-3-thienyperfluorocyclopentene, was designed and synthesized. Its photochromic and fluorescent properties were also investigated in detail. The compound exhibited excellent photochromism, changing from colorless to medium violetred after irradiation with UV light both in solution and in PMMA film. Furthermore, the fluorescence intensity of the photochromic diarylethene1adeclined remarkably, when irradiation with UV light. Using this diarylethene 1a as optical storage and fluorescence switches was performed successfully.
Study on Photochromic Materials with Synthesizes and Properties of a Novel Unsymmetrical Photochromic Diarylethene
Authors: Sun Zhi Yuan , Zhang Xiao Dan , Cui Shi Qiang , Pu Shou Zhi
Published: June 2013

A novel unsymmetrical photochromic diarylethene 1-(2-methyl-3-benzofuran)-2-[5-(2-methylbenzene)-2-methyl-3-thieny perfluorocyclopentene1owas synthesized, then its photochromic, Kinetics and fluorescence properties were investigated. The results showed that the diarylethene compound had good photochromism upon irradiation with 297 nm UV light, in which the absorption maximum were observed at 510 nm in hexane solution and 524 nm in poly methyl methacrylate (PMMA) film. Besides, the cyclization and cycloreversion process of the compound were determined to be the zeroth and first order reaction by UV-Vis spectra, respectively. And, the open-ring isomer of the diarylethene exhibited relatively stronger fluorescence at 427 nm when excited at 273 nm in hexane solution.
Study on Material Properties with Synthesis and Properties of a Photochromic Diarylethene with Acetal Unit
Authors: Wei Sha Sha , Wang Ren Jie , Liu Gang
Published: June 2013

A new unsymmetrical photochromic diarylethene with an acetal unit was synthesized and its photochromic and fluorescent properties were also investigated. The compound exhibited remarkable photochromism both in solution and PMMA film. In PMMA film, the open-ring isomer of the diarylethene 1o exhibited relatively strong fluorescence at 377 nm when excited at 372 nm. All results indicated that the acetal unit played an important role during the process of photochromic reaction for the diarylethene derivatives.
The Research about La0.8Sr0.2CoO3 Application as Dense Diffusion Barrier in Limiting Current Oxygen Sensors
Authors: Wu Yin Lin , Zhao Hai Yan , Li Fu Shen
Published: June 2013

The fabrication and operation of a new thick film type of limiting current oxygen sensor is demonstrated that utilizes yttria (8% mol) stabilized zirconia (YSZ) as oxygen ion conducting solid electrolytes and dense La0.8Sr0.2CoO3(LSC) as diffusion barrier. The oxygen sensor shows a near linear response between 0 to 10.5% O2in argon at 1023K. The advantages of the sensor are simple construction, low cost and potential long term stability.