According to the requirement of vacuum leak detection container for small satellite, a set of vacuum leak detection container is developed. This paper discuss the design of model and the finite element analysis of different models. Through calculating the variation of the displacement X, Y, Z of different...

Considering the disadvantages of general filter aid, a new type of talc filter aid was researched and developed by the two-step approach. The first step was that the talcum powder were heated by microwave in the acid solution. The second step was that the talcum powder was put into dodecyltrimethylammonium...

Electropolymerization is a useful method to modify electrode for improving selectivity, sensitivity and strong adherence to electrode surface. In this paper, we prepared polydopamine (PDA), poly-para-aminobenzoic acid (PABA) and PDA/PABA composite membrane on a glassy carbon electrode (GCE) using cyclic...

This paper is a low sub-surface damage detection method for hard and brittle optical materials. The method is based on the preparation of the test instrument and the detection of the surface damage of the sample to obtain the Brewster's angle of the sample to be tested and further utilize the Brewer...

In order to develop the multifunctional performance of castor silk, it was finished by attapulgite(ATP) colloid nanoparticles. The structure and antibacterial properties of the castor silk fibers before and after finished were characterized by means of scanning electron microscope (SEM) and antibacterial...

The severe vibration of small branch pipes in nuclear power plants can induce fatigue destruction. Sometime fatigue destructions will result in unplanned shutdown, and even threaten the safe and stable operation of the nuclear power plant. In order to predict the remaining life and guarantee the safety...

According to the theory of collaborative research, pointed out that the overall function of the container transport system is not a single function, but by rearranging the elements of the system, achieve the reasonable allocation of resources. Through the co evolution equation, in-depth analysis of container...

Particle packing is a common phenomenon in the field of industrial and agricultural, Stacking angle of repose reflects the macroscopic properties of the combined effects of granular group. In order to study the geometry of the particles impact angle of repose particle packing, in this paper, the rock...

To improve the performance of sodium-modified bentonite in drilling fluids, the natural Ca-base bentonite (Ca-Bent) was modified by microwave wet, which regarded the anionic surfactant SDBS is compounded with inorganic sodium salt as modifier. The effects of different sodium salts, the volume of modifier,...

A dynamic real-time method is proposed in this paper for measuring the spindle-end radial-deformation under spindle speed of 10000~15000 r/min. The system consists of three non-contact eddy current sensors and a laser deformation sensor used to measure the radial-deformation of the rotating simulating...

The design of a small-scale automated warehouse for cargo storage, including mechanical structure system such as shelf, stacker and conveying rail system, and PLC controller, stepper motor and stepper motor drive are composed of high speed and high Precision electrical control system. The system has...

Magnesium oxychloride cement-cornstalk is an environmentally friendly composite, the major constituent of which is magnesium oxychloride cement(MOC) and cornstalk fibers. In order to obtain composites with excellent performance, phosphoric acid and cornstalk fibers was adopted to MOC modification. The...

Ultrasonic-rebound combined method (UCM) is widely adopted to test concrete strength at present. Although it makes up for some shortcomings of rebound method and ultrasonic method respectively, its precision is far below the requirements of engineering. Based on the thought data fusion and inverse regression...

Magnetorheological fluid (MRF) is a kind of rheological property which can produce fast changing material under the action of magnetic field. The rheological properties of MRF can be changed by controlling the strength of magnetic field. When there is no magnetic field, its characteristics appear as...

Montmorillonite (MMT) Na-modificated by suspensoid was modified using cetyltrimethyl ammonium bromide (CTAB) and dodecyltrimethyl ammonium chloride (DTAC), and CTAB-modified montmorillonite (CTAB-MMT) and DTAC-modified montmorillonite (DTAC-MMT) were obtained at the optimum conditions: the reaction temperature...

To study the effect of silicon on microstructures in CLAM (China Low Activation Martensitic) steel after irradiation, the microstructures of Fe and FeSi model alloys were investigated after implanted deuterium ions at 773K. TEM (Transmission Electron Microscope) observation and EDX (Energy Dispersive...

This article provides a broad and extensive literature survey on optimisation of shot peening process that have been developed and applied in the past decades and summarises the knowledge that has been gained and then points out the shortages of the important investigations in optimisation of shot peening...

this paper designs a fire prevention and burglar alarm based on sensors and single chip microcomputer as the core components. First of all, a host computer and a slave computer are designed and made. The intelligent wireless alarm system is composed of a signal acquisition unit, a signal transmission...

The adsorption characteristics of gallic acid on fresh calcium phosphate in sucrose solution were discussed. Three kinetic models, including pseudo-first-order model, pseudo-second-order model and intraparticle diffusion model, were selected to follow the adsorption processes. The results which adsorption...

In this paper, a new soft sensing method based on wavelet packet decomposition and SVM was put forward. As is known the characteristic of pressure drop is nonlinear and non-stationary. Based on the characteristics that the wavelet packet transform can decompose signals to different frequency bands according...

In this paper, the development status, application scenarios and development demands of alternative maritime power (AMP) in ports at home and abroad are studied and the outstanding significance of establishing the business support system for smart power utilization in port facing to AMP operation is...

Gardenia Fructus was one of the first batch of edible-medicinal Traditional Chinese Medicine (TCM). Besides chemical composition,its trace elements have been studied extensively.In this paper, the related reports of trace elements in Gardenia Fructus were summarized, which can provide theoretical support...

Compared with the traditional frame structure, the prestressed prefabricated frame structure has many advantages, of which the mechanical performance of the beam column connection is very important. In this paper, the present research on prestressed fabricated connections at home and abroad is expounded....

GaN nanostructured films have been successfully grown through radio frequency magnetron sputtering system via annealing GaN/ZnO films in ammonia ambient at 950 . The volatilization of ZnO buffer layer plays an important role in the formation process of GaN nanostructures. X-ray diffraction (XRD), transmission...

The stability of tool influnce function (TIF) is the key to achieve deterministic removal in the computer controlled optical surfacing (CCOS). In this paper, the comparative experiment was conducted to investigate the impact of two common pad materials (i.e., cloth, pitch) on the TIF. In addition, by...

The acoustic-vibration parameters of E. urophylla, including specific Young's modulus (E/ ), coefficient of sound-radiation resistance (R), and sound resistance ( ), before and after heat treatment were measured and characterized. Conditions for the heat treatment included N2 as the protection gas and...

The chemical reaction involved in the processing of Atmospheric Pressure Plasma Jet (APPJ) produced from CF4 precursor has been explored. The gas-phase reaction in CF4 plasma and chemical reaction on SiO2 surface, which are the two crucial stages in plasma processing were investigated. The roles of gas-phase...

The leg hydraulic system of truck mounted concrete pump plays an important role in pumping process, and it is necessary to analysis the dynamic characteristics of leg hydraulic system of truck mounted concrete pump. According to the working principle of H-type leg hydraulic system of truck mounted concrete...

Theratio of the thickness of the aggregate accounted for roughly70%,andit's performance is good or bad has a direct impact on the strength of concrete, In this paper, the heating device with coarse aggregate of concrete by varying degrees of high temperature treatment, study the change of its physical...

Reservoir geological profile is an important basic map for zone evaluation and target demonstration. Now oil field departments often use Resform and Coreldraw to draw geological profile, and it's a complicated process with multiple steps. In this paper, based on QuantyView, data integration is made rapidly...

This paper elaborates on adoping both the file filter driver technology and digital watermarking to protect the file and solve the problem of data leakage. Used to develop a filtering driver at the nernel level to encrypt the files, Minifilter technology can offset the lack of robustness of font color...

In this paper, we propose a image retrieval algorithm in JPEG compressed domain. We show that, with the same content based image retrieval algorithm, adding rotational correlation to the existing operational process can improve the performance of content based image retrieval significantly, In comparison...

The radar reconciliation and interference system is constructed, which is based on the function, composition, main technical indexes and implementation methods. The radar reconnaissance and jamming system is analyzed. The radar provides a theoretical basis for the prediction of the use and effect of...

Based on the analysis of the functional requirements of radar confrontation and anti-anti-simulation training system, a simulation training system based on distributed local area network is designed. Practice has proved that the design is complete, mature technology, stable operation, can independently...

In order to increase light extraction efficiency of GaN-based light emitting diodes (LED), surface plasmon (SP) LED, with a graphene grating structure is proposed and modelled. In this structure, the traditional silver film is replaced by a grapheme layer to produce SP. The surface plasmon enhancement...

In order to boost the efficiency of urban rail transit operation, it is necessary to study on urban rail transit route congestion, define interval passenger congestion index, and meet the needs of network load balancing. There a series of procedure for propose a solution, including an analysis of passenger...

The new digital inductance sensor LDC1612 is a dual channel induction sensor. It can detect metal objects by using an inductance coil. It can detect the rotation angle and distance of metal objects. Especially suitable for automatic vehicle tracking, track by thin wire structure. In tracking, the two...

The design of an intelligent tracking car, can form thin wire along the runway running. The detection of metal adopts four channel new digital inductance sensor, each channel is connected with a self made inductance coil. In order to effectively detect the wire runway, the diameter of the self-made coil...

Software defined networking (SDN) has pushed the rapid progress of the network by decoupling the control plane from the data plane thus enabling the dynamism and flexibility of the network compared with the traditional static network architecture. This paper summarizes the theories and the techniques...

Guided by the Sharing economic mode, so many companies, at home and abroad, have already developed rapidly, such as Didi, Tujia, Airbnb, Uber and so on. Online rental industry is the outstanding representative of the Sharing economic development model.This paper aims to analysis both the development...

Nuclear receptors (NRs) are important transcriptional regulators in animals. They regulate different functions, such as lipid, reproduction, carbohydrate metabolism, fibrosis and metabolism. NRs form a category of phylogenetically evolutional proteins and have been separated into diverse subfamilies...

In order to improve the accuracy and reliability of the multi-sensor data fusion, a new modified reciprocal fuzzy neartude based approach to calculate the weights of the fusion model is proposed. Through the research of the fusion model, it is found that the fuzzy neartude is more practical than fuzzy...

Computer hardware course is abstract, Multisim simulation software will be integrated into the computer hardware course teaching, promote the teaching to the development of information technology through the simulation play the role of technology, brings to the teachers and students professional and...

The Small and medium enterprises, which be limited by profitability, management and trade characteristics, are especially sensitive to the cost of information system. In the absence of sufficient financial support and the expected benefits are not clear, optimization of existing information systems,...

Social-based recommendation and collaborative filtering-based recommendation have their own characteristics. Considering that traditional collaborative filtering only makes use of users' behavior data but ignores users' social relationships, a recommendation algorithm combined with social and collaborative...

Computer hardware course is abstract, Multisim simulation software will be integrated into the computer hardware course teaching, promote the teaching to the development of information technology through the simulation play the role of technology, brings to the teachers and students professional and...

The establishing for involute helical cylindrical gear and involute helical bevel gear were completed based on Pro/E. The simulation for assembly and operation was also accomplished for them.The modal analysis, static analysis and the dynamic contact transient analysis for the involute helical gears...

This paper introduces a kind of intelligent greenhouse measurement and control system based on embedded technology and wireless communication technology. The hardware and software control flow of the system are described. In this paper, the method of measuring and controlling the conventional environmental...

In this paper, the R-function theory(RFT) is applied to solve the f bending problem of slip clamped shallow spherical shell. Firstly the fundamental solution of the biharmonic operator, the boundary equation and the R-function are used to construct the quasi-Green's function. Then the model governing...

The high iron screw pile construction technique is a new technique, a kind of foundation reinforcement by representative districts to the manufacturability of pile test, the parameters determined by test pile construction, fixed in time according to the problems found during the process of test pile...

In present paper, by installing the wind tunnel consisted of the spirally-reinforced-groove pipe with the diameter of 325mm, the velocity at different radial positions is measured in the text section where the flow is fully developed into the turbulent. Correspondingly, the velocity profile is obtained....

The technology of software defined networking, which introduces the concept of centralized control, provides a new idea for the intelligent network. Meanwhile, it also introduces the control delay in the end-to-end transmission delay of the service. Industry network has extremely high requirements on...

Resource-constrained test task scheduling problem (RCTSP) is a key problem to testability scheme optimization of materiel. Analyzing the constraints of resources and technologies in testing, a multi-objective optimization model is founded in which objectives are testing time and testing cost, and an...

In the process of space target surveillance system to obtain the target image in space, due to the impact of imaging equipment is limited and some other random factors, Therefore, the final image is blurred and distorted, so it is difficult to estimate and track the target in the later stage. In this...

The dynamic tension is difficult to be measured, but it's very influential of ultra-deep multi rope winding hoist during the working process, the wire rope dynamic tension signal detection system of multi rope winding was designed by the virtual instrument. With the maturity of the technology, LabVIEW...

In the computer aided design of doors and windows, the computer only accurate positioning of fan region in the original frame position to further the design of the plastic window. Based on the design software of a door and window, the concept of convex hull in computational geometry is applied to identify...

In modern industrial production and life, the automobile has become an important means of transportation. However, with the increase in the number of cars, traffic accidents are also increasing. Therefore, the requirements of the performance of the car is also getting higher and higher, and intelligent...

With the development of industrial automation, smart car has been widely used in industrial production. Smart car with automatic tracking, automatic obstacle avoidance, color recognition, wireless remote control and other functions. Able to work in humid, dusty, greasy spots and other harsh environments....

With regard to non-conduction phase and non-commutation current pulsation in brushless DC motor for aviation in conventional two-two conduction based drive mode which are not only to restrict range of speed regulation of motor but also lead to larger torque pulsation, a continuous three-phase current...

The simulation model of the weight-fixed loading hydraulic system with skip at Wangshiwa Coal Mine was built to analyze the flow and pressure change of the system. According to the simulation results of one working cycle of hydraulic fix-weight loading, the lifting speed of hydraulic cylinder is smooth;...

One purpose of government micro-blogging is to provide services for the public. Therefore, it is of great significance to study the users' characteristics and clustering user group for providing personalization services and micro-blogging's operation and management. In this paper, a measuring interaction...

It has become well known that knowledge about key network members is essential for monitoring public opinion and controlling rumor propagation effectively in online social networks. According to global topology of online social network and coritivity theory, a coritivity-based method for finding key...

In this paper, we measured liquid surface tension coefficient of the 20 degrees' pure water by FD-NST-I liquid surface tension coefficient measuring instrument, and made further discussion of when to read the number of digital voltmeter. We divided the pulling escape process of ring leaving liquid membrane...

The waveform of acoustic signal when the vehicle passing the deceleration strip is obviously different from where it driving on the normal road, of which the characteristic parameters can be extracted and is essential to automatically identify the quantity, speed and type of the vehicle. Extracting the...

In order to avoid premature death of cluster head nodes, a clustering approach is proposed in this paper. The nodes are labeled as different colors according to the value of the remaining contribution. The cluster head is elected by the color. It is able to reduce the rotation of cluster heads and maintain...

The simulation model of X-Type leg hydraulic system of a concrete pump is established based on AMESim according to the working principle of X-Type leg hydraulic system, and the dynamic characteristics of X-Type leg hydraulic system is analyzed. The research result provides some reference for design and...

A greenhouse monitoring system based on wireless sensor network is constructed to collect and transmit the greenhouse environment parameters and acoustic emission (AE) signals under crop disease stress. Low power consumption single chip ATmega8 and sensors for environmental parameters are used to monitor...

In this work, we proposed the control method for a robotic rotary hydraulic actuator. We have designed and fabricated some prototypes of rotary hydraulic actuators. Because of valve dead zone, load disturbance and variable hydraulic pressure, the simplex PID method can't meet the control complexity....

Control Network (CN) has been developed in many field. The application of intelligent community has no far from our life. In this paper, we propose the establishment of CN based on wireless IP service. Common device can access network rapidly through wifi or Ethernet. The development of application can...

For carbonate reservoirs with great heterogeneity, the flow unit study can provide fine anatomical sand-bodies and more accurately characterize the internal heterogeneities of sand-bodies. By using the mode of flow unit study, it can provide guidelines for the research and adjustment of remaining oil...

In this paper, a Legendre-Galerkin method is proposed and analyzed for the Burgers equation with dirichlet boundary condition. We present in this paper the error estimation concerning Legendre approximations in Sobolev spaces, in which integration is performed with respect to the Legendre weight. It...

Contourlet transform has been widely used in many image processing applications including digital image denoising, texture image retrieval, etc. When contourlet transform is used for texture image retrieval problems, features like standard deviation, skewness, kurtosis, L1-energy, L2-energy and others...

Noise pollution does harm to urban residents, so we design an unpitched sound generator using masking effect in psychoacoustics, which can conceal or compete with ambient noise, in order to help people to be more concentrate. It can also generate warning noise according to the speed of electric bikes...

The purpose of this paper is to ascertain the meshing point position of the cycloidal-pin wheel, which is the basis of studying the transmission performance of RV(Rotate Vector) reducer in robot. In terms of the general theoretical tooth profile equation of cycloid gear in RV reducer , the space meshing...

The basic structure of the bicycle was introduced. The assembly process of the bicycle was given. The automatic assembly technology was used to realize the assembly of the key parts of the bicycle. Through the intelligent production management system, MES, the entire assembly process of bicycle information...

For background modeling, the conventional Gaussian Mixture Model (GMM) is a popular approach. However, because of the inappropriate parameters updating method, GMM often suffers from a problem that it cannot classify a pixel into background or foreground correctly for longtime. In the paper, we proposed...

The main contribution of the paper is to construct and analyze the finite element model in the Chinese bone setting training system. First we construct humeral geometrical model, based on this model we build up the finite element model. The experiments show the obtained models are efficient.

Advanced internet information technology enables a revolution for people's daily lives. Apart from social network sites, such as Facebook, microblogs have become the second inevitable and significant communication platform all over the world. Common people, celebrities, firms and governmental agencies...

In view of the problem of extraordinary instability of agricultural products' prices, especially regional and seasonal agricultural products, an early warning system of regional seasonal agricultural products based on the linkage of production and marketing price was designed. The system takes ginger...

In this paper, a new discrete scheme is constructed for nonlinear transient Burgers equation by using the multiple integral finite volume method combined with Lagrange interpolation. The scheme has third order accuracy in space. Of course, higher accuracy can be achieved by adding interpolation nodes....

In order to better regulate the cyberspace and guide network public opinion in a right direction, forecasting the trend of network public opinion evolution has been a hotspot in recent years. Generally, netizens are often vulnerable to external factors, but more are affected by "bounded rationality"...

Manufacturing Execution System (MES) is the core application platform of intelligent manufacturing for the modern Numerical Control (NC) shop floor under the background of industry 4.0. Based on the characteristics and the business model of production operation in the modern NC shop floor, the system...

Through analyzing the structural features of the 3-RPS parallel mechanism, establish the position constraint equations of the parallel mechanism, input the initial value, calculate the value of positive solution to location by symbolic operation in the Matlab and get the corresponding institutions posture...

In view of the high requirement of solid phase quantification for pneumatic conveying in some parts of industrial & agricultural production, positive pressure up-extraction fluidized bin pneumatic conveying system was established. Experiments were carried out in this pneumatic conveying system by transmitting...

For aircraft large thin-walled flexible fixture locating surface is small, insufficient clamping force, clamping rigidity is not enough, not suitable for milling, in order to solve the problem of cutting force and installation stiffness do not match, approximate surface developed the intelligent flexible...

The lower case is part of a gearbox to support the hub or bearing. The material of this casting is ductile iron. Process design is based on the paste-like solidification of ductile iron and the self-expanding characteristics of graphite[1]. The pouring system is designed according to the theory of large...

The purpose of this paper is to analyze the characteristics of electro hydraulic force servo system, at the same time, considering the serious disturbance of the friction force in the electro hydraulic force servo system, the nonlinear factors in the controlled object are analyzed, then we consider that...

Ti6Al4V thin-walled part have been widely used in the field of aerospace, shipbuilding with the excellent properties of light weight, high strength, good corrosion resistance. But the thin-walled part has lower rigidity; the cutting force and vibration generated in cutting process can deform the work...

Creep property is the key factor for effecting geogrid-reinforced earth retaining structures under a long-term behavior. Contrast test is adopted for creep property of geogrids under different temperature in the indoor test. The result indicates as follows: creep property of plastic geogrids is totally...

In this paper, the dissimilar resistance spot welding of A6061 aluminum alloy and AZ31 magnesium alloy sheet is studied, and the middle layer is Zn and Sn. The results show that the addition of Zn and Sn as the intermediate layer can effectively prevent the formation of intermetallic compounds, and can...

Commercially pure titanium and type 304 stainless steel sheet was welded by using the resistance spot welding with a niobium insert as well as welding the specimen by different welding current. The tensile shear strength and the factors of affecting mechanical properties of the joints was investigated...

In this paper, A6061 aluminum alloy and Q235 steel were used as the research object, and the bonding interface of the joint was observed by electron beam microscope. The tensile test was carried out by using a tensile tester. The results show that the riveting joints of aluminum /steel are not produced...

In order to improve the efficiency and benefit of equipment maintenance, reduce the maintenance cost, we need to optimize the repair process of armored equipment. First of all, the paper analyzes the process flow and influence factors of the gear transmission box, and determines the optimization target...

In order to develop a simple and facile method to fabricate a stable and even silver nanoparticles (Ag NPs) colloid solution, the multi-amino compound (RSD-NH2) as a highly effective self-reducing agent was used to reduce silver ions to Ag NPs. The Ag NPs showed a spherical structure with diameter of...

The accuracy of holes which are typical feature in various parts is an important requirement in 3D printing. In this paper, the influence of extrusion head temperature, layer thickness, line-width compensation, printing speed and other factors on the shrinkage of model with hole is researched in FDM...

The main control algorithms of hydraulic suspension of tractor are analyzed. The advanced electro-hydraulic suspension control system in foreign countries is introduced in detail, and the development trend of hydraulic suspension control technology is expounded. The article points out that the integration...

For the problems about large disturbances, delays and nonlinear of master-slave manipulator force sensing system, the paper designed a fuzzy self-tuning PID controller and carried out simulation analysis by matlab/simulink. The result showed that the designed controller can effectively improve the dynamic...

Experimental studies to compare combustion characteristics of kerosene fuels and diesel fuel were performed in a single cylinder diesel engine respectively in order to find out if kerosene fuels could be used as alternative fuels in special vehicles in emergency. Three kinds of fuels such as -10# diesel,...

Experimental studies to compare spray characteristics of kerosene fuels and diesel fuel were performed in a constant-volume vessel. Three kinds of fuels such as -10# diesel, aviation kerosene and lamp kerosene were tested. The spray characteristics were studied by use of the shadowgraph method. The spray...

A simple mathematical modelling method of five-axis machine tool with a universal spindle head was proposed according to the structural characteristics of the machine tool. The mathematical formula of the kinematic errors of the machine tool, which has two rotary axes superimposed together, is derived....