The microstructure and mechanical properties of AZ61- 1Sm magnesium alloy with Sb addition were analyzed by X-ray diffraction (XRD), light optical microscopy (OM), and scanning electron microscopy(SEM). The results demonstrate that addition of 0.5wt.%Sb to the AZ61-1Sm alloy obtains the highest ultimate...

Aero-engine alloys (also as known as superalloys)are known as difficult-to-machine materials, especially at higher cutting speeds, due to their several inherent properties such as low thermal conductivity and their high reactivity with cutting tool materials. In this paper a finite element analysis (FEA)...

The capacitance method is one of the commonly-used methods for measuring the moisture content of green sand. However, due to the influence of the plate structure, the contact resistance and the parasitic capacitance and so on, there is a big non-linear problem. On the basis of briefly introducing the...

In this paper, the concept and characters of Agent technology are researched. By applying Agent technology into Military Simulation System, a Military Simulation System framework based on Multi-Agent technology is put forward. Each Agent, model warehouse, knowledge warehouse and database of the Military...

The SEA (Statistical Energy Analysis) model of the hypersonic aircraft is established based on the SEA theory. Three parameters of the SEA model are determined by the theory, experiential formula and experimental data. Compared the simulation with the experiment, the results of numerical simulation and...

DK460UF is deposited on the surface of 9341 high-speed steel by DZ-4000( ) multifunctional surface hardening machine which use argon as shielding gas. They occur metallurgical reaction by electro-spark deposition technology to make electro-spark deposition migrate to the surface of the tool and form...

Based on the pole placement design technique, a full state feed back controller using separation factor is proposed to stabilize a real single inverted pendulum. The strategy is to start with selection two dominant poles that achieve a certain desired performance, using a separation factor between the...

Conductive ink formulation is designed by changing the proportion between resin and conductive filler. Making rectangular sample which have different formulation and lengthwidth ratio through silk screen printing .Then testing and analyzing sample surface resistivity, sample surface temperature and sample...

The debate on activity-based costing (ABC) method between researchers focuses on whether the cost driver selection is scientific and how to prove that ABC method is superior to the traditional cost accounting method. In this paper, regression model is adopted to test cost drivers’ correlation based on...

On the basis of fairness theory, relationship marketing theory and social exchange theory, this manuscript develops a conceptual model to confirm three perceived fairness ( distributive fairness, procedural fairness and interactional fairness), as well as three kinds of relationship quality ( satisfaction,...

A hydraulic test platform of large component is designed in this paper. The technique method and design concept of test platform are studied. The structure diagram of the test platform is given, and the validity of the design by analyzing the structure of the loading system is also proved ,via UG software....

One pattern of patch antenna with the function of reconfiguration is presented. This antenna is composed of one rectangle patch and two U-shape patches .They can be connected by RF MEMS (micro electromechanical systems for RF circuits) switches. By controlling the states of these RF MEMS switches, the...

This paper discusses a teaching method customized for mechanical engineering students. Based on the educational goals of ‘competency-based learning’, where students specifically hunt for the skills they need to acquire, a more flexible way of designing has been taught to stimulate their creativity, as...

The torque coefficient of any wind turbine must have highest limit. In this paper, an analytical expression of torque coefficient associated with tip speed ratio and airfoil lift drag ratio of wind turbine with ideal chord has been deduced by integrating along the blade wingspan using the blade element...

The system is based on PLC and configuration software, and the SCADA power distribution monitoring system is designed. The system uses PLC to collect various intelligent instruments on site and electrical parameters of devices. they will be uploaded to the monitoring system by the switch through the...

Technology system has been in evolution. Solving contradictions of technical system is the driving force of evolution. All technical systems evolution follows certain objective laws. As an organism, the technical system itself is constantly changing. When the technology innovation evolutionary path through...

A novel ionic polymer based on crosslinked poly(vinyl alcohol) - succinic acid -5-Sulfoisophthalic acid sodium salt (PVASS) was prepared using solution casting method and the electromechanical performance was studied for the first time. The PVASS membranes were characterized using Fourier transform infrared(FT-IR)...

In the gear transmission system, especially , during the gear meshing transmission process of high-speed, heavy duty gear system, during a very short time of mono-, bis-teeth alternately meshing, the tooth mutation is generated by the loads, the tooth exciting and changes of tooth meshing stiffness are...

In the present study, numerical studies are carried out to investigate the heat transfer in rectangular duct roughened by square and trapezoidal shaped ribs on one wall using different fluids. The coolant fluids such as air, steam, air/mist and steam/mist were investigated. The computational results...

There is serious scaling and corrosion in water injection line of Liaohe oil field. By analyzing water quality, it is learned that water quality of Liaohe oil field was alkaline, and its alkalinity was relatively high, containing much calcium ion, magnesium ion, chloride ion, sulfate ion, sulfate ion,...

Water-entry is a very difficult problem whether in theoretical analysis, in experiment analysis or in numerical simulation. In this paper, the high-speed water-entry of an axisymmetric body with six-DOF flow field was studied. The flow field was simulated by dynamic gird and user defined function (UDF),...

In the present work, computational simulations were made using SST turbulence model with Gamma Theta model which available in ANSYS CFX. Multi-trench configuration consists of two trenches together, one wider trench and the other is narrow trench that extruded from the wider one. Multi trench configuration...

This research analyzed the current situation and future development trend in auto after-sales service industry. Then based on the five dimensions of service quality (fairness, empathy, reliability, responsiveness and convenience), three dimensions of relationship quality (satisfaction, trust and commitment),...

Current water pipeline drilling scaling equipment cannot clean effectively. In order to solve this problem, analyzes the dill descaling method and the characteristics of virtual prototyping technology, improved the unit. Construct three dimensional models with SolidWorks software, define subassembly...

Under considering the interaction of the factors, the effects of the clay content, moisture content and coal content on the compactibility, permeability, green compressive strength and shatter index of green sand for high density moulding have been studied according to the orthogonal experimental method....

Virtual training system is important to improve the force operational capability. Due to urgent training needs for new type howitzer, the virtual training system was established based on analysis of a variety of training methods. From the system characteristic, the function modules were designed. Methods...

The machine vision system for the detection of the gear pitting is an essential element for the mechanical fatigue test, because the whole system effectively integrates internal information of the fatigue test to classify the related data into different sort automatically. Therefore, an industrial machine...

On the basis of researching the fluid flow meter calibrating method and device, this paper has designed a set of flow meter calibrating system which based on LabVIEW software. It mainly introduces the hardware device, software control system and influence factors of precision test. The system use the...

Anatase N, F and Sm codoped TiO2 sol (N-F-Sm-TiO2) catalysts were prepared by a modified sol-gel hydrothermal method, using tetra butyl titanate as precursor. The morphology, particle size and the present forms of F, N and Sm atoms of as-prepared N-F-Sm-TiO2 sol were characterized by XRD TEM UV-Vis-DRS...

Valves play an important role in the reciprocating compressor running, which will open and close according to the different piston work phases in the reciprocating compressor to control the gas discharge or suction. The time to open and close of the valves have limited with many affection which affects...

Tool wear/tool life of PVD cemented coated carbide material in machining superalloy In718 has been studied by different methods. Self-organization theory is one of the effective ways to explain tool wear/tool life. In this paper, worn and fractured surfaces of the cutting tools were characterized by...

After deeply analyzing the relation between reason and symptom of rotor fault, the sample entropy was introduced into the fault diagnosis field of rotating machinery. Combined with rank-order morphological filtering and sample entropy, a novel feature extraction method was proposed for rotor. Firstly,...

Motion platform is widely used to simulate the movement of ship and vehicle, which is of great value for testing of ship and vehicle equipment, motion simulator for training to steer. A novel digital hydraulic 2-DOF motion platform for simulating marine environment is developed, which include incremental...

The LED node temperature rises with the increasing of power and it leads to sharp attenuation LED’s life, according to these characteristics, combining active and passive cooling methods to design a new type of heat sink. The maximum temperature of LED is controlled in 43 C . At last a heat analysis...

This paper analyzes the performance of aerostatic thrust bearing working in low-vacuum condition using Computational Fluid Dynamics (CFD) software Fluent. Load Carrying Capacity (LCC), stiffness, gas leakage of the bearings with different geometrical structures are calculated and the results indicate...

In order to improve the dynamic tracking ability of adjusting system for the subreflector of 65 meters radio telescope, and lay the foundation for the calibration works, PID parameters were adjusted through parabolic speed response and ramp position response based on electrical control system. Circle...

In this work, Two-Axis Fast Steering Mirror (FSM) was designed to facilitate the fast and precise positioning for an optical bundle of a Three Dimensional (3D) scanner consists mainly of a Laser Range Finder (LRF) and a Complementary Metal–Oxide–Semiconductor (CMOS) camera. The FSM system architecture,...

Dynamic characteristic of the micro plate under the micro scale effect shows non-linear features, traditional linear analysis methods can not satisfy the design precision of MEMS system, and non-linear dynamics analysis method provides an effective solution. In this paper, based on the small deflection...

Due to the complexity of the laser and material interaction, it is difficult to control the quality of the hole in the laser drilling process. The thermodynamic model of laser drilling is built which is based on the characteristics of the laser drilling and processing environment. The temperature field...

The existing alternative irrigation devices are still stuck in the stage manually select the irrigated area through human operation to achieve the selected area of irrigation, timeconsuming, response speed is slow. The existing irrigation devices need to use other means of experimental observations to...

Contact stress analysis on the high-speed double-nut ball screw has been done, contact deformation has been derived, and we got the formulas of axial stiffness of ball screws, and then we got some main factors which could influence the axial stiffness of ball screws, such as preload, helix angle, contact...

Analytical equations are presented herein to predict the penetration of semi-infinite metallic targets struck normally by long rods at high velocities. The analysis is based on energy balance where the kinetic energy loss of a long rod is related to the energy dissipated by the plastic deformations in...

The special processing method of paraffin was introduced, which was processed by a special cutting tool——Hot-Knife. This paper adopted this method for processing paraffin, proposed the implementation requirements for conditions of paraffin, structure of the cutting tool and working principle of the machine,...

Ammonium aluminum carbonate hydroxide (AACH) can be obtained from different anions of aluminum sources by a solid-state reaction. Anions play a crucial role on the properties of AACH. It is observed that best-crystallized AACH can be obtained from Al2(SO4)3. Depending on the nature of anion present during...

The configuration and working principle of a novel radial hybrid magnetic bearing (RHMB) are introduced in this paper, and its 3-D nonlinear finite element model, based on which air gap magnetic field distributions and magnetic forces on the rotor under different displacements and control currents are...

The target of this research is to make a study of the dynamics simulation about regenerative braking energy system of electric bus , and explore the feasibility of this system. Electric bus is rear axle drive and has rear-mounted biaxial parallel hydraulic hybrid system ,using AMESim software to establish...

As a case study of vertical shaft spring grinder, this paper analyses the process of spring end grinding and establishes geometric model of spring face grinding, then calculates the formula of grinding force by the formula of surface grinding machine with vertical spindle and rotary table. Meanwhile,...

For the company which has successfully implemented ABC-system, the urgent problem is how to use the foundation information of ABC-system to control the cost formed in the process of production effectively, establish an overall cost management system which included cost calculation and cost control, then...

The underground gas explosion test model to detect intensity of the mine refuge shelter is simulated through LSDYNA to obtain the surface pressure of the mine refuge shelter in underground gas explosion, using the TNT to replace the mixture gas. Pressure distribution of the front shelter is descending...

The low cycle fatigue fracture properties are studied based on notch and smooth specimens fatigue tests in this work. The relationship between strain and life and that between stress and energy are observated under different load conditions. The -N curve in double logarithmic coordinates for different...

Mesostructured -Al2O3 has been successfully synthesized via an ionic liquid-assisted solvent evaporation process. The results show that ionic liquid [Omim]+Cl- plays an important role in the formation of the mesostructure due to its strong interactions with reaction particles.The synthesized porous -Al2O3...

This paper deals with the speed control of a variable speed double-fed induction generator (DFIG)-based wind turbine. These variable speed control systems have several advantages over the traditional wind turbine, such as the increase in the energy capture and the reduction of the mechanical stress....

To ensure the variation of tooth backlash in allowable value required in common gears transmission, a new transmission mechanism was proposed in this paper to solve the problem of tooth backlash change, composed by an eccentric gear and an eccentric modified gear. The design principle of the eccentric...

Based on CauChy formula and the basic principles of space coordinate transformation, investigated arbitrary inclined borehole, derived borehole coordinate components transformation and stress components transformation between borehole coordinate system and in-situ stress coordinate system, and the main...

Taking the spur gear as the study object, this paper introduces the method of reconstruction wear gear model by reverse engineering for gear laser cladding repairing. Using the laser scanning measuring system, through the reverse digital, point cloud pre-processing technology, matched 3D CAD model of...

The determination of frequencies and models in fluid of the structure is an important problem in the fluid-solid coupling study. We analyzed an axial flow pump blade by finite element analysis software ADINA in the paper, then we got its models in air and fluid respectively. The modal frequencies of...

Analitical solution of the inverse kinematics has been found only for some particular structures of 6-DOF serial manipulator. We propose the Method of Sequential Retrieval by modifying the Effective Solution for Inverse Kinematics to solve the inverse kinematics for a 6-DOF robot arm which has not been...

Considering the characteristics of fire in the cabin of Civil Aviation, a new method is introduced to do the fire simulation by using computer simulation. Some basic theories, computational models and practical problems are given about the fire dynamics simulation software FDS and evacuation software...

Base on the study and analysis of existing ordinary nozzle and their atomization mechanism, the water mist fire extinguishing nozzle is developed and experimentally studied with Laser Doppler Velocimetry (LDV) and Phase Doppler Particle Analyzer (PDPA). The characteristics of flow coefficient K, atomizing...

Numerical analyses were carried out to investigate the aerodynamic characteristics of clamshell fairing separation at Mach 5 in low altitude atmosphere. A three dimensional numerical model was set up. The flow fields of the closed fairing and condition at the initial opening angle were simulated. Results...

White body finite element model of a light-truck cab is established, with which numerical and experimental modal calculations and analysis are conducted. Based on modal matching principle, a dynamic characteristics analysis is performed, and on the same time, the cab structure optimization is carried...

Attapulgite (ATP) reinforced poly(butylene succinateco- butylene adipate) (PBSA) nanocomposites were prepared by melt mixing in a HAAKE mixer. The fracture surfaces of PBSA/ATP nanocomposites showed superior interfacial linkage between ATP and PBSA matrix. The dynamic rheology properties of PBSA and...

The input and output torque of different shafts are important parameters in the design of vertical mixer’s transmission agent. However, the calculation of the torque is so difficult because of the complex structure. In order to solve this problem, a relationship between input and output torque, number...

Here a simple method for fabrication of the microfluidic device with micro- and nanochannels was developed. The microchannels in micro and nano scales were fabricated on a glass substrate during a two- step process respectively. And then the glass substrate with the microchannels was bonded with another...

In the process of fire of rapid firing rate 30 mm guns, it was not only difficult to guarantee firing accuracy and mobility but also had high requirements on the carriage strength because of large recoil force, therefore this design provided a scheme about hydraulic spring buffer mechanism to reduce...

The density of acquired data by 3D laser scanner is huge and is not convenient for curved face reconstruction, model reconstruction, data storage, data display and transmission. Firstly, the conventional point cloud data classification and simplification method is introduced. Secondly, the angle deviation...

An opening HIP (high and intermediate pressure) casing overhaul of a 360MW turbine should be taken in 2012 on schedule. And this kind of overhaul wasn’t taken on the turbine during the past 12 years from startup. But the overhaul needs to be delayed for some reasons. A comprehensive condition assessment...

This report details the thermodynamic analysis on zinc reduction of silicon tetrachloride. The diagrams of rGm -T and Kp -T for the Zinc production reaction were plotted. The reasonable temperature range was obtained by the thermodynamic analysis. The theoretical basis of improvements of the equipment...

The AC( Alternating Current) electric dynamometer test bench consists of an AC electric dynamometer,a traction motor,a frequency converter ACS800,a motor controller,a power analyzer WT3000 and etc. By simulation of ADVISOR,relationship between traction motor speed n and load torque Tz in ECE-EUDC driving...

It is a difficult problem to reduce the low-frequency vibration and radiation noise of underwater structure by decoupling coating. Assuming decoupling coating as viscoelastic fluid, a vibroacoustic model of a simply supported rectangular plate covered by decoupling coating is presented. The model simulates...

NH4Al(OH)2CO3 precursors were prepared using Al(NO3)3 and NH4HCO3 as raw materials. The structural, morphological, and porous properties of the materials were investigated by BET, X-ray Diffraction (XRD), and Scanning Electron Microscope (SEM).The morphology and aspect ratios of resulting AACH nanoparticles...

A 3D model of the upper and lower support were established via ANSYS WORKBENCH14 on the basis of a new cooling system and both temperature and stress of different materials coupling simulation analysis have been done. The result shows that: One of the best choices of the material of the supports were...

Contact angle hysteresis has an important impact on liquid bridges between sphere particles. The paper studies the dynamic contact angles effect on capillary and viscous forces of liquid bridges, calculation results indicate that its effects on capillary force are significant; however, it has little...

In the thesis, “Personal Computer(PC) + Motion Control Card” program is adopted to design multi-axis automatic control system and presents the method to control the interface and procedures in LabVIEW through ActiveX technology. The use of servo motors with feedback function could achieve closed-loop...

The basic direct torque control (DTC) scheme may cause big ripples in torque, flux and current because of the small number of applicable voltage vectors. And the variation of the stator resistance has great influence on torque and stator flux estimation especially when the PMSM(permanent magnet synchronous...

The trend toward high power density engines has led to new implementation of more intelligent thermal management systems. Advanced thermal management systems for internal combustion engines can help in reducing the fuel consumption, pollutant emissions, warm up time, noise level as well as improving...

The location of point excitation force is an important factor to influence sound radiation of underwater structure. A vibroacoustic model of a simply supported rectangular plate covered by decoupling coating is presented. The influences of the locations and the number of point excitation force to sound...

An excitation signal source which is capable of suppressing temperature drifting is designed in this paper. The influence of temperature drifting of the amplifier on the stability and accuracy of data measurements is also studied. The mathematical model on which the design is based is introduced and...

Magnesium alloys as the emerging commercial metal structure material have excellent specific properties and stability, which is more and more important for researcher. The magnesium alloy of Mg-Al series, Mg-Zn series, Mg-RE series included Mg-Y series alloy, Mg-Gd-Y series alloy, Mg-RE-Zr series alloy,...

In an effort to improve the property of escort mechanism of vertical internal broaching machine, a new-style escort mechanism is designed. Work process and defect about structure of escort mechanism in existence is firstly analyzed in depth, design concept and implementation methods of the new escort...

The engagement of wet clutch was modeled by developing a modified Reynolds equation, based on the average flow model of Patir and Cheng. Influences of surface roughness, material permeability and centrifugal force were included in the model. The Greenwood-Tripp method was used to develop the asperity...

The effect on handling stability by active suspension is analyzed to select the most suitable modes of control input. After that, based on fuzzy sliding mode control algorithm, an active suspension controller is designed for improving performance of vehicle handling stability. Simulation is made to verify...

U beam steel arch has widely been used in nonferrous metal mines support especially in deep mining due to its ductile and high bearing capacity. This paper aimed at the simulation analyses based on the finite element method for U beam steel arch production. The comparison of the bearing capacity between...

The non-equilibrium flow and frozen flow of hydrocarbon scramjet nozzle were numerically simulated to research the non-equilibrium effects on the nozzle performance. The numerical results show the recombination occurs during the expansion in the scramjet nozzle, which is helpful to the nozzle performance....

A new wireless temperature measurement system which aims to measure the interior temperature distribution in a rolling tire is presented. In the system, Negative Temperature Coefficient (NTC) thermistor of bead type was selected as the temperature sensor; while a RF Module (Transmitters & Receiver) was...

Accurate cost information is the basis of management decision-making. Researches on the accuracy of ABC have to remain at logical analysis limited to the difficulties in the actual data acquisition and the lack of measurement methods. On the premise of available cost data of HZ company, this paper suggests...

In this study, three turbulence models k-
, standard k-  and SST Gamma Theta which all available in ANSYS CFX were used. Gamma Theta Model is the recommended transition model for general-purpose applications. The full transition model is based on two transport equations, one for the intermittency and...

Nowadays, with the greenhouse problem has been plaguing the world, the carbon footprint is also becoming an increasingly serious problem for manufacturing industry. To enable manufactures and operators of machining to take carbon footprint into their considerations in an objective way, this paper established...

Thermodynamic calculation for main reactions happening in the process of fabricating hydroxyapatite(HA) composite coating by laser cladding using the mixture of the calcium carbonate (CaCO3) and calcium hydrogen phosphate dihydrate (CaHPO4•2H2O) is carried out to obtain a high content of HA in coating....

Achieving high-accuracy and repeatable fabrication of nanoelectromechanical switch is a grand challenge. In this paper, a new approach based on 3-D nanomanipulation has been proposed to integrate zinc oxide nanowire with lithographically patterned electrodes. Compared with other methods, a high level...

Will design a good air compressor station system dynamic simulation run, will run process shows that for air compressor station design offer help and reference. Through the use of configuration software (KingView) complete air compressor station system simulation to verify the performance of the system,...

According to the requirements of United Nations on cluster munition submunition, this paper provides a kind of MEMS(micro-electromechanical Systems) suitable for the fuze, which uses turbine as the power of submunition fuze, and analyses flow field of turbine in the domain of work with simulation. The...

This article is about the principles of hydraulic experiments measurement and control simulations under Windows interface and the ways to realize them. Using C# and PLC , you can monitor, measure, output data and eventually finish your experiments. All your experiments are flexible and respond quickly...

With the preliminary hypothesis of constant bistatic angle, matching filter pulse compression with non-coherent bistatic ISAR imaging mechanism is adopted and the reason of space target migration through resolution cell (MTRC) while bistatic inverse synthetic aperture radar (ISAR) imaging is researched....

Mass imbalance is a common cause of vibration in rotating machinery, which can damage the rotary system or the whole system. To solve this problem, the best balanced measure is to perform real-time online dynamic balance compensation during operation. In this study, a new type of high-speed electric...

The paper analyzes the related research status of the complex network, and studies on construction method of networks of parts relation for products. By applying interpretive structural modeling to the product structure analysis, this article proposes one structure analysis method that based on interpretative...