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...

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....

ENR40/ precipitated silica (P-silica) compounds were prepared by in an open two-roll laboratory mixing mill at 50~60 . Curing properties and mechanical properties was investigated. In order to reveal the interaction between ENR40 and P-silica, ENR40/P-silica compounds were extracted in toluene to obtain...

The problem of ice blockage has always been a thorny issue when the fluidized ice equipment is making ice. Based on the origin of ice blockage, we analyze the causes of the problem. And then, we melt the ice with hot water, that is: the heat carried from the compressor (this part of heat can transform...

Magnetic graphene oxide (MGO) was prepared, and characterized using Fourier transform infrared spectroscopy and transmission electronic microscopy. The MGO was used as the sorbent for adsorption of atrazine, and the adsorption performance was investigated under various conditions. Results indicated that...

A novel halogen-free flame retardant of polyphosphonate (PDDP), has been synthesized by the melt polymerization. The structure of PDDP has been characterized by fourier transform infrared spectroscopy and nuclear magnetic resonance spectra. Results of vertical burning (UL-94), limiting oxygen index (LOI),...

In this paper, the manufacture method of degradable intervertebral fusion stent with good mechanical properties and biocompatibility based on 3D printing technology is researched. Firstly, the mixing process of synthetic macromolecule and bioceramic powder is studied. And develop a high temperature stirring...

A novel self-intumescent flame retardant of branched polyphosphoramide (BPCDC), was synthesized by the solution polymerization. The chemical structure of BPCDC has been demonstrated by fourier transform infrared spectroscopy (FTIR), and the flame-retardant properties of EP/BPCDC composites was investigated...

Tetrahedral amorphous carbon ( ta-C) films were deposited with filtered cathodic vacuum arc by changing the substrate bias from 0V to 500V. The fraction of the sp3 bonding will be effected by the substrate bias, and the sp3 fraction is about 85% when the substrate bias is -200V. The RMS of the films...

Machining tests were used to identify the kinematic errors of the rotary axes in machine tools. The key to design the machining tests is analyzing the relationship of the kinematic errors of the machine tool and the machining errors of the test workpiece. By adopting the error-sensitive direction vector,...

In this study, the influence of three types of pre-wetted lightweight aggregates (PLWA) on the shrinkage of concrete was experimentally investigated, in which the variation of the volume fractions and moisture content was considered. The results show that the shrinkage of concrete after age 150d increased...

Determination of the mechanical properties of urea-formaldehyde (UF) microcapsules is extremely important. In this study, UF microcapsules were made by using in situ polymerization method. The diameter and thickness of UF microcapsules were characterized by using scanning electron microscopy (SEM). In...

In this study, the influence of lead sulfate on the transport of chloride in mortar was investigated by chloride ion permeation test. The changes of cement hydration products in cement-based materials containing lead sulfate were observed by scanning electron microscopy (SEM).The results show that the...

The influences of garlic and ginger essential oil coating on the quality of turbot (Psetta maxima) fillets during storage were investigated. Total viable count (TVC), total volatile basic nitrogen (TVB-N) , pH and texture profile were measured to evaluate the preservative effect of essential oil coating...