For the current vocational education training equipment about photovoltaic generation, the control system is lacking of output voltage regulation module. To solve this weakness, this paper puts forward an optimized control system that can provide a constant DC 48V voltage source to ensure the stable...

The existing photo thermal training equipment in vocational education is usual a simulative system that cannot support practical training exercises. As well as, different photo-thermal technologies cannot comprehensively integrated for study. To solve these defects, this paper puts forward a comprehensive...

Based on the acquisition of a distance education website user access behavior data, the paper analyzed two diversion indicators, PV and UV, and several sticky indicators that reflect video on demand and live streaming browsing. By the data analysis, the paper found the change regulation of the PV, the...

The poly (L–lactic acid) (PLLA) micro/nano fibrous multi-porous films are fabricated by electrospinning. The effect of flow rate, spinning time and the type of solvent on the mechanical properties, pore volumes, distributions of pore size and specific areas of PLLA micro/nano fibrous multi-porous films...

Taiwan has significantly varying terrains, and majority of its population centralize in the plain area, where most cities are located. Most buildings here are for both commercial and residential use, and they are expanding upward in order to make use of the space better. In such high-rise buildings,...

Annealed SAE 52100 steel samples with different spheroidized microstructures were austempered to produce a bainitic+martensitic duplex microstructure. The effects of the spheroidized microstructure on bainite ferrite (BF) nucleation during austempering were discussed. Results show that the proportion...

In order to increase the crack monitoring sensitivity of a rosette eddy current array sensor, a crack-monitoring system was established, and an equivalent sensor model was developed by COMSOL. Then the influence of the sensor's topology on its sensitivity was investigated. The results indicate that the...

In the process of heating for materials, ordinary PID control methods cause the high temperature overshoot, which damages the structure and properties of the sample. In views of the large thermal inertia under the vacuum system, A PID control based on dynamic temperature assignment (PID-DTA) was proposed....

As China's economic development, social demand for electricity continues to increase, while the primary energy to the unbalanced distribution of electricity load centers resulted in our country needs long-distance, high-capacity transmission. To improve power quality, series capacitor compensation as...

With the development of big data, cloud computing, Internet of Things, "Internet +" launched a new round of revolution in the industry. With the release of the Power reform document 9 and a series of supporting documents, the China's power reform gets a new opportunity. In the sale side of power reforms,...

In order to make full use of the solid wastes, an energy internet is designed for Laogang base, the biggest place to recycle wastes in Shanghai. This energy internet combine heat and methane with electricity on the basis of current multi-energy system in Laogang to increase energy utilization rate and...

We first examine the techniques, development, and application future of the current recommender systems in the film industry. Various recommendation techniques in current applications and the K-nearest neighbor (aka. KNN) algorithm, in particular, is then introduced in detail. This is followed by an...

Coronary heart disease is a serious harm to human health and common disease in many cases, in Hainan, is also one of the common multiple fatal diseases. This paper analyzes the association rules of clinical diagnosis and treatment of coronary heart disease in patients with coronary heart disease, analyzes...

This paper presents a temperature/supply stable and resistorless voltage reference for high-precision portable electronic products. the reference obtains a good temperature coefficient over a wide temperature range through high-order curvature compensation. In order to reduce the temperature nonlinearity,...

In order to meet CCAR/FAR/CS 25.1309 airworthiness requirements, commercial airplane safety design and management platform has been established, combined with the COMAC new plane development procedures. In areas of development processes management, life cycle configuration management and security quantitative...

Fog haze weather frequently appears in recent years. Fog haze not only makes the travel inconvenient, also has a harmful effect on body. Fog haze brings serious security hidden danger to the power grid safety and power equipment operation. The lightest situation is shortening the time of saturated salt...

Along With the continuous expansion of urban power grid in China, the rapid growth of power load and the requirement of improving the reliability of power supply, more and more urban and rural distribution networks adopt insulated overhead conductors. In order to ensure the safety of maintenance personnel,...

Employing infrared telemetry principle and diffusion theory, this paper has established remote sensing model of continuous point source hazard clouds according to its density, harm in-depth and corner relationship. After a series of experiments, this model is convincible in effectively realize its immediate...

Understanding the settlement process of Cr in marine bay is essential to pollution control and environmental remediation. Jiaozhou Bay is a semi-closed bay located in Shandong Province, China. This paper analyzed the seasonal variations of Cr in bottom waters, and identified the settlement process. Results...

A method of attitude measurement using general commercial photoelectric sensor is proposed for the floated inertial platform. The installation error of the photoelectric sensor is analyzed and modeled, and the weighted recursive least squares algorithm is proposed to identify the misalignment angle....

Aiming at the existing problems of the current methods in the area of guidance instrumentation error separation, such as the multicollinearity impact, the large noise effect and the low accuracy of separation results, a brand new algorithm is proposed. Firstly, basing on the advantage of wavelet analysis...

In this paper, a soil cutting test rig was developed equipping with two force sensors and a displacement sensor. The equipment could perform measurements continuously at various cutting speeds when the cutting tools worked in the soils. The cutting tool is a rectangle blade. It can moves horizontally...

The design of wireless sensor network is growing more mature over time accumulating and technology developing while still is threatened by the future demand. In this paper, the author discussed the wireless sensor network design for the Internet of Things by combining the Internet of Things with the...

This paper proposed a solution method for the nonlinear frequency response analysis of structures combining the Nonlinear Single Resonant Mode (NSRM) theory and eigenvector perturbation theory. The NSRM theory assumes that only the mode in the vicinity of a resonant mode has nonlinear behavior, and the...

In this paper, the radome of 3/4 power series generatrix is taken as the object of study, and fluid-thermal-structure coupling field of it is simulated and analyzed with sequential coupling method. The aerodynamic load under Ma=6 flight condition is calculated using standard model. Then the finite element...

In recent years as the rise of Internet + and geographic information system technology, the traditional GIS has a new development space, let a lot of further application of spatial data, decision making analysis on the space for us to provide the technical support. In the implementation of the national...

In recent years, with the rise of the Internet + and geographic information system technology, the traditional GIS has a new development space, let a lot of further application of spatial data for agricultural decision making analysis on the space provided technical support. In Internet + corn fertilizing...

Now, electric grid enterprises play an irreplaceable role in the rapid development of informationization. Mobile Agent technology, as a new part of the electric grid, improves the network management and use ratio of information. At present, share of information is needed in many industries and administrative...

The larger power transformers are greatly affected by the DC magnetic biasing phenomenon, which may cause the local overheating and threaten the safe operation of the power transformer. We aimed at studying the temperature distribution and temperature rise in the power transformer under DC magnetic biasing...

This paper studies the control system of self-excavated excavator, which is based on the working device of the small type loader. Firstly, the kinematics model of the working device is established by D-H method, so that the trajectory planning of the vehicle speed, boom oil cylinder and bucket oil cylinder...

Flow pulsation characteristic is the inherent characteristic of the axial plunger pump, and it is an important factor that affects the working performance and the stability of the hydraulic system. To reduce the flow pulsation of axial plunger pump, theoretical analysis of the motion characteristics...

A straight-tube type high pressure air ejection device was studied in this paper, aiming at impacts that structure parameters, gas source characteristics and environmental factors on the interior ballistic characteristics of ejection system and considering the real gas effects of compressed air, an interior...

A Monte Carlo reliability simulation method based on T-S fuzzy fault tree model is proposed to solve the problem of hydraulic system reliability modeling and simulation. Firstly, a reliability analysis model of hydraulic system based on T-S fuzzy fault tree model is established. Secondly, based on the...

Since SF6 has high liquefaction temperature, the reliability of GIS, GIL and other gas insulated electrical equipment is reduced, and the maintenance cost is high in areas with high latitude. Therefore, applying mixed gas of SF6 and N2 as an insulating medium can reduce the liquefaction temperature of...

To facilitate the intelligent virtual terminal to analyze the object pool data, the basic characteristics of object pool data are studied and the data storage structure of object pool in the virtual terminal is presented. According to the technical standard of virtual terminal based on ISO11783-6, the...

An economic operation control strategy of island microgrid based on optimal scheduling of energy storage is proposed in this paper. The state of charge (SOC) and type of microgrid is fully considered in this strategy. In grid-tied island microgrid the energy storage charging control is carried out according...

An excitation mode for magnetic coupled resonant wireless electric power transfer was proposed, and its equivalent physical model was built. Mathematical expressions of transfer power and efficiency were built through analyzing operation mode and time-domain waveform thereof. Energy transfer characteristics...

With the increasing use of cloud computing, virtualization has developed rapidly as the key technology. Especially, Docker container technology has become the focus of attention of researchers because of its advantages of easy deployment and high performance. Consequently the research of Docker security...

Industrial networks, regarded as the core of intelligent manufacturing, mostly are implemented to support various monitoring applications in industrial environments. As such, the low-latency and high-reliability are the vital metrics especially under heavy loads. However, the existing conventional TCP/IP...

This paper proposes a face-based gender classifier which is based on Adaboost, and selects the face database with different color, angle and illumination. A variety of feature extraction methods are used to reduce the dimension, noise and calculation of the sample, and ensure a high recognition rate....

Finite strip element theory is applied to the analysis of single cell curved box girder. Firstly finite strip element theory is introduced and stiff matrix of the finite curved strip is deduced. The problem of the element coupling of strip element stiff matrix by using the orthogonal property of harmonious...

The precision and reliability of sensors are tested rigorously under the influence of low temperature as on-line monitoring technology sensation unit of transmission lines. In the paper, bending amplitude method was applied in aeolian vibration monitoring devices of transmission lines. Device function...

Safety accidents are much more than general occasions,therefore strengthen the simulation training safety technology training,which could make the worker familiar with tools of production safety operating rules,is particularly urgent!Electric marketing skill training is an important part to keep electricity...

It was discovered that there was prominent interaction among transformer oil moisture content, acid value, furfural content and insulation paper polymerization degree during monitoring of transformer operation. Therefore, insulation paper aging and furfural generation under the action of thermal energy...

The reinforced technology by using FRP sheet has a certain application in practical engineering, it basically adopts the passive paste of non prestressed FRP sheet to raise the bearing capacity of components. Carbon fibre has high tensile strength and modulus of elasticity, but the ductility of the carbon...

This study designed an automatic monitoring system for non-contact measurement of the surround rock deformation in underground tunnels in an unattended operation mode. This system can automatically and periodically monitor the deformation of the surrounding rocks in underground tunnels with low power...

Recently, two-dimensional atomic layers of transition metal dichalcogenides (TMDs) have drawn more attention because of their remarkable electronic and optical properties. How to effectively identify the number of TMDs layers becomes an important issue. Here, we report the determination of the number...

With the rapid development of Internet, people becoming busier day by day are beginning to use domestic Internet, a powerful platform, to do business online. It is not the strongest of the species that survive, but the one most responsive to change. Since our team's project is to build Ou Palace's network...

using small commercial UAV equipped with a simple visible light camerato obtain the depth information of power line and the ground through monocular or binocular vision is the focus of the research. And how to use digital image processing method to extract the power linerapidly, accurately, automatically...

In order to obtain good circular polarization, parallel metallic plates are used for large-scale rectangular waveguide slot array antennas to achieve pure linear polarization at first. It is found that these plates not only suppress cross-polarization, but also influence the original amplitude distribution...

Two finite element models based on PATRAN/ NASTRAN are carried out to determine the nail load distribution of double lap structure with composites and metal materials. And the results were compared with the classical stiffness algorithm to verify the simulation model is effectiveness to calculate pin...

USV's hull form optimization is a multi-objective optimization problem, which involves coordination and unification of performance in all aspects. To determine the sensitivity to overall optimization including rapidity, maneuverability, seakeeping and overturning of the USV was an important aspect in...

We present a novel method of laser machining 3D curved surface by 5-axis CNC laser machining system pertaining to the manufacturing processes of laser marking, laser mold texturing and laser direct structuring (LDS). We begin by presenting the need of texture mapping technology which is used in 3D curved...

Based on the AR4000-LIR type infrared laser rangefinder, the prototype of the 3-D laser-scanning-based machine vision system for robotic construction vehicles is developed and the software for scanning control, swing control and data sampling/processing is programmed. The experimental results show that...

At present, the rapid development of science and technology to improve people's quality of life requirements, the traditional home to smart home development has become an inevitable trend. But the development of smart home in the country compared to abroad, or far less. In the production and manufacturing...

Aviation ad-hoc network with the characteristics of large scale, high dynamics and the small node density, there are many problems exist in the high-speed mobile environment. The link constituted between high speed airplanes has a certain particularity. Consequently, the aviation ad-hoc network protocol...

Since the born of the photonic crystal fiber, because of the excellent characteristics which is superior to the traditional fiber, it has become research hotspots in the field of optical fiber communication, optical sensing and optical devices in recent years. However, the loss of fiber has been restricting...

The temperature is an important parameter for resistance furnace among the industries. Its nonlinear characteristics makes it is difficult to be controlled, therefore it is necessary to find out an effective method to get the resistance furnace temperature under control. The hybrid particle swarm algorithm...

Design and development of virtual experiments has become one of the focuses of the current research, thus the development of virtual experiment using 3ds MAX and VRP-Builder editor technology will also be the development trend of virtual experiment development. And 3ds MAX technology can realize the...

In this paper, the organic phase is penetrated into the ceramic skeleton using a vacuum impregnation process to prepare a biomimetic composite with shell pearl layer structure,which the Al2O3 porous ceramics preparing by freeze-drying method are inorganic phase skeleton, epoxy resin curing system as...

Physics is a branch of science, mainly to explore by experiment. Mechanics is an organic part of physics, mechanics experiment is particularly important. Experiment is a teacher to teach, students learn the important link, is an important part of mechanics.Simulation experiment method in recent years,...

Virtual reality, a new technology in the world, is introduced and discussed according tothe regularity of dust dispersion in the atmosphere, and on the basis of mathematical model, a three dimensional dynamic scene of dust dispersion is developed by adopting OpenGL, inwhich the parameters of flow field...

Based on the analysis of the present situation of the construction of the west of Jilin Province College of business incubators, find out the objective factors affecting and restricting the construction of College Students' entrepreneurial base, proposed the university to create a shared type business...

The 30 Cybister japonicus Sharp margin behavior were observed, recording, analysis and description in the laboratory of animal experiment center of Baicheng Normal University from 2016.3.6 to 2016.5.6 and 2016.5.7 to 2016.7.7 and 2016.7.17 to 2016.8.27, which lasted 160 days, a total of 640 hours. And...

The concept of Web knowledge service is proposed with regard to the issues on sharing, integration and reuse of heterogeneous distributed Web knowledge resource combined with Web service technology in order to provide an architecture of knowledge management system based on Web knowledge service, which...

For finding the changing law that the interaction between the photons and the water, the experiment has been finish and the result has been analyzed. Two half circles of them one is black and another is white are in different depth in water and the images are took. The results are shown that the object...

As the imaging technology improves the resolution of the astronomical image, how to effectively and efficiently extract objects has become a big challenge. As the dimension of the CCD image matrix is increasing with the increase of the astronomical image resolution, the traditional method which needs...

In China, under the background of improved about concentration degree of crop breeding enterprise and technology of crop breeding, it was the inevitable choice that carry out crop breeding technology innovation, strengthen information communication, joint crop breeding, and promoted the core competitiveness...

In order to improve the efficiency of railway operation and management, and meet the needs of unmanned value development, the railway room equipment working conditions and the engine room environment are monitored with MCU and sensor technology. Administrator will be notified immediately via GSM SMS...

An effective density clustering algorithm, called Clustering by Fast Search and Find of Density Peaks (CFSFDP), is appeared on science in 2014, which is simple and efficient and doesn't need many parameters. However, it needs make sure of cut-off distance parameter artificially. For the above problems,...

Existing security protocols are only promoted or evaluated in one of the aspects of security or performance, but network users' demand for network security is diverse and varied. Providing one security protocol does not meet users' demand. Meanwhile, there is a severe phenomenon of wasting network resource....

On the basis of the study of SQLite and other concurrency control mechanisms in memory database, an adaptive concurrency control mechanism is proposed according to the operating environment of SQLite in intelligent mobile devices. The function and concrete flow of improved concurrency control are introduced...

Considering the problems of low solution precision and suffering from pre-mature convergence by the basic bat algorithm, an improved self-adaptive bat algorithm (SABA) is proposed after the introduction of the self-adaptive step-controlled mechanism and mutation mechanism in this paper. The results of...

In order to shorten the design cycle and to improve the design efficiency of the engine combustion system, a cloud-based design platform of engine combustion system integrating cloud computing, parameterized and modular rapid design is proposed. The overall framework of the engine combustion system analysis...

In view of the urgent need of radiator matching during the process of modern bulldozer design and considering the diversity as well as the individualization of different bulldozer types, a cloud design platform for bulldozer radiator which integrates cloud computing, parameterized and modular rapid matching...

Narrowband Internet of Things has great advantage over low speed rate, which is a new cellular technology based on 3GPP Release 13 standard. NB-IoT plays an extremely important role in the era of all things interconnected as a technology of low power consumption and wide area coverage of LPWAN (Low Power...

Data visualization can support statisticians to analyze vast volumes of data more easily and efficiently. We proposed a novel data visualization algorithm for water quality monitoring network to process water quality data in real time. Our algorithm can analyze vast water quality data as well as dynamically...

It is less likely to construct an exact mathematical mode as actual industrial processes are featured with non-linearity and uncertainty, which further causes the conventional PID controller to fail to achieve an ideal control effect. In this paper, a PID controller parameter optimization method was...

This paper analyzed the annual change and seasonal variation of Cd in Jiaozhou Bay during 1979-1983. Results showed that the highest values of Cd contents in 1979-1982 were confirm to Grade I (1.00 g L-1) of National Sea Water Quality Standard (GB 3097-1997), yet in 1983 were Grade II. For temporal changes,...