In order to extract looseness fault feature for a generator set, the paper introduces a new time-frequency analysis method, called frequency slice wavelet transform (FSWT). The time-frequency distribution of signal is firstly processed by the FSWT. Then some interesting regions on the FSWT time-frequency...

Thermodynamic geometry is a special method for the research of black holes. Following that achievements in Hawking radiation of black holes and black hole entropy are obtained and the relationship between black holes and thermodynamics is figured out, more and more people are obsessed with thermodynamic...

It is quite difficult to get the temperature field of flow liquid from the three-dimensional perspective by hand calculation. But we figure out an unusual method to obtain the temperature, and we also use 3D software to simulate and test. In order to facilitate the calculation, we use cuboid bathtub...

Robot was developed to give a new mean of mechanization and automation of the production process. The design of the robot is used in the automotive automatic production line for loading and unloading of the workpieces. It is from the base, the mechanical arm parts, the wrist rotation parts ,and the Interchangeable...

NVH characteristic is to study how to address and reduce the mechanical operation of the noise, vibration and comfort issues. In recent years carried out against mechanical vibration and noise control technology for the latest development and trend Survey, the development of NVH technology, research...

Walking in the current world has become one of the most popular sports items, walking motion easiest, most convenient and most economical, therefore, in the past few decades, in pursuit of a healthy lifestyle, the number of people walking increases every year, more and more people choose to exercise...

Particulate emission of diesel engines which seriously affects environment and human health is a hot topic in recent diesel engine researches. In this article, a diesel engine particulate sampling devise was designed, particulate sampling experiments were done in different positions with different exhaust...

The rolling machine has been widely used in agricultural facilities,For the pre-push rolling machine has about two-metre-wide blanket below the reduction gear can not be automatic rolled up and down problems, Designed a seamless device which can automatic roll up and down the intermediate blanket .The...

The motion of the lost plane will be affected mainly by the wind stress, and the Coriolis force, of which the Coriolis force will be always on work. The motion of the plane after downed to the water can be divided into three steps. Our model analyzed the plane wreck’s motion in the horizontal direction...

Wind energy as an inexhaustible green energy is the development trend of the future. Wind turbine bolts play an important role for the service safety of wind turbine, and have become the new promising product of the fastener industry in the world. But because of the high strength bolt connection failure...

Wind energy as an inexhaustible green energy is the development trend of the future. Wind turbine bolts play an important role for the service safety of wind turbine, and have become the new promising product of the fastener industry in the world. But because of the high strength bolt connection failure...

This study adopts a 3D model of a double cantilever beam with interlayer defects under pulsed laser. The type II stress intensity factor at the 3D crack tip of the interlayer and its variation with time are obtained via displacement extrapolation under the classical thermoelasticity and generalized thermoelasticity,...

In this paper, the walking mechanism model of intelligent spray robot with it is stable and accurate approaches to ward the design structure are introduced. According the requirements of intelligent spraying robot, it uses the following method. First of all, designing the 3D model in PROE, for improving...

Traditional mosaic methods of unmanned aerial vehicle (UAV) need ground control points, which are difficult to implement in the emergency situation. A new image mosaic method on small unmanned aerial vehicle is proposed. The method uses the Harris algorithm to extract the feature points and refines them...

In order to study the effects of interlayer strength, interface strength and interface dip angle on the propagation of interface crack in layered salt rock subjected to compress and shear load, traction-separation cohesive behavior is introduced within the framework of extended finite element method...

Many factors, such as over-voltage and switch on or off, could produce FREMP which will affect the normal work of electrical equipment. High voltage disturbance signal may lead to the function degrade of equipment and the equipment will be damaged when the disturbance signal voltage exceeds a certain...

We study the thermal transmission of the fluent water whit steady velocity. First we divide the water into lots of little grids in two-dimensional space and study the temperature distribution of the fluent water. To make accurate numerical calculation, we then regard the grid in fluent water as an open...

The article established mathematical models to gain the temperature field of water in a bathtub of different shapes. At the beginning, the basic model including heating and cooling model is established on condition that the bathtub is 1.8 0.7 0.8 cuboid without a person in it. Afterwards, the shape and...

In order to study the influence of the design parameters of baffled demister, the efficiency and the pressure drop of the inlet and outlet of the blade with different structure parameters and operating conditions were calculated by using the discrete phase model of Fluent. The results show that the parameters...

we use the governing equation and continuity equation to build a two-dimensional model of water temperature on micro element theory. Because the partial differential equation is difficult to obtain its analytical solution, we use finite difference method to work out numerical solution of the model.

We study the thermal transmission of the static water. First we divide the water into lots of little grids in three-dimensional space and study the temperature distribution of the static water. To make accurate numerical calculation, we then discuss the thermal transmission of the typical grids and establish...

This article mainly introduces the design of the continuous and automatic controlled congestion irrigator based on STC230 color sensor, which contains hardware design and software design. There are three aspects being taken account of in hardware design. They are the power supply, the whole single processing...

Based on multiple embedding theory, traditional multi-scale entropy is optimized by local characteristic-scale decomposition (LCD) and fast kurtogram (FK) which can be called LFK for short. In the improved method, the vibration signal of rolling bearing is decomposed by LCD and the two component signals...

According to the heat sensitive of projectile-launched plex equipment made by the PE, the ballistic radial friction condition is analyzed. The numerical analysis model of the rotary sliding friction relative speed between the plex equipment and the projectile body is setup. Based on the numeric calculation...

For some passenger car’s torsion beam suspension appearing fatigue fracture problem, a method of structure optimization is proposed. By changing the hard point location of the torsion beam suspension spring, the vehicle’s coupled model is built. Through carrying out the vehicle dynamic simulation analysis...

Adoption documentary summary and logical analysis, we discuss the problems and matters needs attention during specific endurance training The result shows that there is a common problem in specific training, that is the weakness in training effect Meanwhile, it leads to backward overall.. level of specific...

with the fast rapid development of high-speed railway and heavy haul, the company of a locomotive bogie assembly line production capacity and production efficiency needs to be improved. In order to improve the production efficiency of the assembly workshop of the bogie and improve annual output and save...

In this paper, a time-dependent model is established to determine the optimal scheme which can bring economically attractive opportunity to a private firm. yield was taken into account in this model (yield is a variable varies from time). We build a time-dependent model to balance the costs and benefits,...

The burning of coals in urban and rural areas in northern China is inevitable, and many of them have not taken any measures to reduce the dust and smoke. The burning of coal in urban and rural areas in northern China is inevitable, and many of them have not taken any measures to reduce the dust and smoke....

Firstly we build a set of models to describe the temperature of the bathtub water in time. In this section, we analyze the variation process of water temperature under the condition of Natural cooling and injecting hot water respectively through a macro perspective. The Newton’s cooling law and the energy...

Self-reconfigurable robot is a kind of robot that is able to recover its original function after partial damage of the robotic system. This is achieved by making changes on the partially damaged robot. This paper put forward a kind of self-reconfigurable quadruped robot based on the resilient theory....

In this paper, logarithmic spiral arch ring is selected and finite element method is used to perform stress analysis and shape optimization and propose a program optimization of arch dam shape basing on arch-cantilever method, which plays an important role in improving safety of arch dam, reducing cost,...

Improved random selection strategy, self-adaptive crossover and mutation operators, population co-evolution algorithm are adopted in this paper to set up a new genetic algorithm(GA), guaranteeing the universality of population, the thoroughness of solution and the execution efficiency of algorithm in...

The blade of the turbo blisk often cracks due to rotor’s resonance. The research on influence degree to the turbine blade mode with different constrains of blisk can gain the universal fixture in the modal tests. For this purpose, the vibrant characteristic of blisk was gained by FEM, as well as the...

Several mathematical models are proposed to determine the shapes of bathtub and manipulative time, which are not only related to the heat source, the maximum capacity and volume of water, but also the motions of user and ingredients of water.

The bud shaped solar heating box comprises a box body , a one-way pressure release on the box cover, reflective board, vacuum heat collector, a fixed ring, ellipsoidal hinge and other parts. This product uses vacuum collector to convert the solar energy ,which is from the high efficiency of the reflector,...

This is a study on environment inside subway cabin under the effects of piston winds. Subway trains move fast in underground tunnels and induce strong piston winds which will change the atmospheric environment around every cabin. Through a more realistic Computational Fluid Dynamics approach with a full-scale...

The relevant increase in the number of uncontrolled space debris is nowadays considered one of the main threats for future sustainability of space activities and space access. With the increase amount of space debris, space debris causes more widespread attention over the world. After analyzing the relationship...

In order to improve the accuracy of motion control, a turning model under steady state conditions of Tracked Mobile Robots (TMRs) is provided, based on considering tracks slipping. With making the sprocket rotating speed ratio of inner track to outer track independent variable, the turning of TMRs under...

The large eddy simulation method with mixture model is used to describe the inside two-phase flow of the oil - water separator. Then flow analyses of hydrocyclone field with different structures are compared by numerical simulation in the inside flow field of oil - water hydrocyclone. The result shows...

The large eddy simulation method is used to simulate the flow field in the hydrocyclone with double conical structure, and the result shows that existence of the secondary swirl has a vital effect on the separation. The tangential velocity in the swirling flow could be regarded as a kind of rankine-like...

In the past 20 years, numerous in-pipe inspection robots (IPIRs) have been designed and utilized. According to the propulsion mechanism amount, these in-pipe inspection robots (IPIRs) can be summarized into two categories, i.e. single locomotion system and multiple locomotion system. This paper presents...

This paper is dedicated to find a unique solution for the optimization of engine performance and emissions which have a trade-off between NOx-soot-BSFC. To develop regression models for engine performance and emissions, multiple nonlinear regression with uniform design is employed. And the accuracy of...

This paper outlines the basic structure of equipment maintenance work, analyzes the conditions and necessity for the emergence of green maintenance, from the different aspects of quantitative requirements, maintenance method, maintenance materials, maintenance energy , maintenance process and maintenance...

The CNC machining technology is of great significance to the modern manufacturing industry. In this paper, the motion of the CNC machining tool is optimized. In order to solve this problem, we divided into steps as follows: firstly, we take a look ahead velocity curve and deceleration control algorithm...

In this paper, we build the model to determine the best strategy that the person in the bathtub can keep the temperature.

An escalator accident occurred in a subway station of Shanghai City, resulting into that the running direction of the escalator sudden reversals, resulting in that some passengers were injured. In this paper, the failure analysis of chain plate of broken chain drive chain is analyzed. The escalator driving...

In the era of modern industrial civilization, with science and technology being developed rapidly, friction and wear become scientists' dedicated areas. The paper aims to reveal the mechanism of abrasive wear and fatigue wear, discussing the calculation formula, various factors and the way they affect...

This paper presents the design and simulation of metal-contact RF microelectromechanical system (MEMS) switch based on the multilayer metal stack Au/Cu/Au. The novel concept of Au/Cu/Au contact metallization is introduced to increase the hardness of the contact material. The mechanical and RF characteristics...

Atmospheric boundary layer is the conveying channel of the earth's atmospheric momentum, heat, and all kinds of material. The main characteristic of the fluid motion in the atmospheric boundary layer is the turbulence, and the wind speed of atmospheric boundary layer increases with the increase of height,...

As the trend of economic globalization is continuously enhanced, product faces more and more market competitions. In order to survive and development, product has to push out the product that meet the requirements of market with quicker speed(time to market), higher quality, lower cost and better service....

As an important transportation tool of earth stone, mining truck withstand the impact of complex alternating dynamic load. Suspension as a connection of frame and axle, reduce the impact effectively. The double arm independent suspension was regarded as the research object in this paper, and analyzed...

The level exchanging buffer of large erecting hydraulic cylinder is one of the core issues in the process of rapid erecting equipment development. This paper combines the actual, building analysis platform of fluid-structure interaction by using fluent and workbench,researching the effect of the change...

A novel self-excited oscillation spraying blade has been designed and the geometric model of the conical surface and rectangular surface self-excited oscillation spraying blade have been established. The flow field distribution of novel spraying blade has been obtained by finite element analysis, simulation...

Scientific evaluation of fashion design is the need of modern design. This research discusses the basic structure of fashion design evaluation system. From the designer's point of view, fashion design elements was divided into core design and extension design, as basic for the establishment of fashion...

Take-off skill is one of the most important part in half-pipe snowboarding which directly determined the flying height, flying time, even the quality of motion. Study on the kinematic parameters of take-off stage of some master-standard athletes for the purpose of researching on the factors influencing...

Marine energy generation systems have gained extensive attention in the past decade. The greatest advantage of tidal current energy over other marine energy sources is its lower dependence on the weather. Tidal stream generation system consists of an energy capturer, a shaft, a gearbox to reach a high...

This study makes use of (1) LifeMod biomechanics software to construct customized user parameters; (2) the load conditions of hip joint and knee joint created by software analysis to serve as a basis of motor rating selection; (3) foot plantar pressure measurement plate and gesture recognition sensors...

A new QKD implementation scheme of BB84 protocol is introduced based on FPGA. Firstly, the overall design method and the functional division are described in detail. Then, the logic design of the sub-module are significantly studied, including random data module, laser source drive module, error correcting...

TSZ-6A type strain control triaxial compression apparatus is applied for indoor test of some soil samples in Gansu Longdong (Qingyang) loess landslide, unconfined shear test of undisturbed soil samples, and the loading and unloading test of loess remodeling. The influences of different moisture content...

in order to study the anti-vibration performance of the steel structure buildings, the finite element analysis model was established. On the basis of reasonable selection of the type of finite element, the failure modes, ultimate load, maximum plastic rotation, ductility and energy dissipation performance...

With the constant development and application of computer information technology, especially in the field of computer application technology development, people’s dynamics research, modeling and calculation on complex mechanical system are becoming more and more common and feasible. Based on the simulation...

In the whole structure framework of high-speed EMU, brake control system is a key part and stands in the core position. Brake control system’s normal and stable work directly relates to EMU’ safe and reliable operation condition, therefore, the strengthening of monitoring state and fault diagnosis level...

Charge pump is the configuration which can provide a voltage gain to program nonvolatile memory in radio frequency identification (RFID). In this paper, A complete theory of charge pump is presented, which shows that the influence of body effect on power dissipation and power efficiency is more and more...

According to the principal of aircraft electrical anti-skid braking system a detection equipment was designed by integrity using PLC technology, LCD graphical displaying, measurement and control data processing, information storage and communication technology. The design schemes of hardware and software...

The paper study object is the CNC servo system, and it presented three closed-loops control strategy based on PMSM. Through dynamic mathematical model of current loop, rotational speed loop and position loop were established and simplified. The closed-loop regulator was designed. The system was corrected...

Question answer communities such as Stack Overflow and Yahoo! Answers are becoming more and more popular knowledge sharing communities, which have attracted great interest from both industry and academia. On such communities, people can ask questions of any kind and then wait for someone else to answer...