With the development of computer technology, computer vision technology was getting more mature. The two-dimensional detection in the badminton Hawkeye system was studied with background subtraction. The mass center coordinates of the badminton were obtained after eliminating the influence of the isolated...

With the development of manufacturing techniques and hardware devices, the need for high-speed chips is bursting. As a review report, we analyze the fundamentals and latest progress of modeling, analysis, and design technologies for signal integrity and electromagnetic compatibility on PCB and package...

The PHP as an open-source coding language is becoming more and more popular for companies, web developers and researchers. It is frequently adopted when building up a server. Protecting PHP code from being plagiarized is also a hot research issue especially with the rapid development of dynamic web industry...

As the development of electric equipment and distributed control system, the application of the distributed high-efficient system is everywhere. Being with many advantages such as environmental protection and so on, electric heating has been promoted actively in some places. As far as public buildings...

The application of artificial neural network theory has penetrated into all fields, and in the intelligent control, the development of the neural network computer optimization computing, computer vision and image processing, pattern recognition, continuous speech recognition, data compression, knowledge...

The Internet of things has become the computer and the Internet after the wave of new information technologies. The goal of the Internet of things is a comprehensive perception, on the basis of Internet technology and platform, to build a person connected to the object, content and the content of the...

With the rapid and bursting development in the subject of computer science and data mining technology, the combination of data analysis and network security is indeed needed. In response of the fact that traditional intrusion detection systems are not able to fulfill the requirements for specific network...

The study on the design of interactive multimedia system is a requirement of the development of information technology and satellite communications. In this paper, the author tries to explore the design of system for wireless environment with RTP agreement for the sake of solving the problems wired network...

This paper research the results of quality management information system at home and abroad, through the analysis of the domestic coal enterprises coal quality management links and management information system development present situation and existing problems, combining with related theory and system...

With the rapid growth of domestic economy, science and technology level unceasing enhancement, the rapid development of electronic information technology, the computer database technology is widely used in various fields, playing an increasingly important role. Computer database technology in the application...

as the core technology and an important foundation of computer database system, the construction of data model for the development of a variety of data management software provides effective reference for the design. Structure mode in the construction of the database structure, different data model to...

For large monitoring objects, often require tens of thousands of concurrent report data monitoring sensor, and often involve the high-speed data acquisition frequency, resulting in high speed large concurrent real-time transmission of data flow, the design of the monitoring system of communication service...

Through folding screen of dendritic discharge in Fushun Power Supply Company 220kV Gongnong Station, this paper folding screen in the basic process of dendritic discharge fault, argument insulation be affected with damp be affected with damp and gas are the main external cause the folding screen dendritic...

Pointed out that the lead wire resistance difference quality lead wire connection is not tight tap switch bad contact tap switch finger refers to a shift of the position pointer and winding broken strands is caused by the main reason of DC resistance unbalance rate exceed in transformer, and combined...

This paper based on the 220kV ACCC wire part of Liao Yuan line composite insulator for insulating properties, mechanical properties and material performance testing, a comprehensive assessment of the effect of high temperature on the properties, define physical stability and reliability, composite insulator...

This paper describes the development of a new transmission line live working foreign body removal, a tool developed by a lightweight safe, efficient, timely treatment and threats to the safe operation of overhead transmission lines foreign body proved to avoid the strong electric field of charged workers...

Together export transformer short-circuit accident analysis for a 66kV substation, analyze a variety of test methods 66kV transformer winding deformation, and the advantages and disadvantages of these test methods are discussed in detail, based on capacitance changes proposed transformer winding and...

Through the analysis of lightning to the harmfulness of the power transmission line, puts forward the specific measures to prevent lightning accidents, improving insulation, installing controllable discharge lightning rod, reducing the tower grounding resistance, adding coupling ground wire and the proper...

In order to solve the existing high voltage switch gear when the voltage difference method using core phase, due to the different switch gear supporting capacitive sensor indicators are inconsistent, resulting in phase sequence check misjudgment and other issues, this paper uses the phase difference...

At the main transformer for Helping on the 1st pre-test and found that the 1st variant of 66kV side of the A-phase winding DC resistance is too large, and the phase imbalance difference of 7.21%. On all aspects of the test wiring, testing and other parts were examined and treated, the test data did not...

Electric power industry standard DL/T911 2004 Frequency Response Analysis Method of Power Transformer Winding Deformation, it is definition of winding deformation Under the action of mechanical force or electric force, the power transformer windings axial or radial size changes, usually it characterized...

Through several examples, describes the harmonic distribution network and its equipment hazards. Harmonics can cause distribution transformers demonstration power loss and additional loss increases, resulting in reduced aging transformer oil and insulation properties, triggering a distribution transformer...

Transformer DC resistance test is one of the routine test in the transformer core project, but the test efficiency is generally low.The paper ,through the analysis of transient process of large DC resistance measurement of transformer coil, core hysteresis phenomenon and the influence of residual magnetism...

This article illustrates the characteristics and proportion of GIS system failure through the introduction to GIS system structure and characteristics; In order to make the GIS in the safe operation of the power system, It is necessary to test AC withstand voltage at the scene.

Isolation switch of the high voltage alternating current usually emerge some faults, as the suffered losses of electrical power system is increasing, people will begin to pay attention to the fault problems of isolation switch. Through knowing the basic performance of isolation switch, people give some...

Hybrid electric vehicle is the car which increase a electric drive system on the traditional internal combustion engine vehicle. The coordination work based on the drive motor and the internal combustion engine can reduce fuel consumption and CO2 emission. Considering on the special characteristics and...

As the main supporting equipment of the fully mechanized coal system, hydraulic bracket bears complex alternating load. The fatigue failure of welded structure as the main part of hydraulic bracket often occurs. In this paper, based on the welded structure of hydraulic bracket, the design methods and...

Aiming at the existence of shear machine hydraulic brake disc friction pair wear quantity, temperature overrun problems couldn't be measured online, research and develop an online intelligent test system, test the temperature of friction pair and wear of hydraulic brake. This paper introduces the structure...

The direct CVD-spun multi-membrane carbon nanotube yarn is mechanically twisted to engineer its structures and to enhance its mechanical properties. Homogenously twisted CNT yarns with a dense cross-section are achieved with different degrees of twisting. The mechanical twisting remarkably increases...

Cement concrete airport pavement frequently damaged in fatigue failure caused under the effect of reciprocating wheel pressure. Repair effect by traditional materials were not effective.In this study, which fiber PVA were used as a reinforcing material, the PVA - ECC airport pavement were tested on test...

This article is devoted of changes of mechanical properties of hot rolled steel as a result of a reducing of rigidity of the rolling stands. From the analysis of studies of hot rolled steel statistically it is shown that as a result of reconstruction the change of stiffness of working stands of rolling...

This paper reports on dynamic characteristics of a cable-towed acoustic array system during ship’s loop turning maneuvers with a lumped parameter model. The transient behavior of the towed sonar array given rise to the tow-ship’s loop maneuvers with different towing speeds, tuning radii, and current...

In this paper, a modified natural boundary element method (MNBEM) by using a modified DtN operator to improve the natural boundary element method (NBEM) is proposed for Neumann BVPs of the Helmholtz equation on unbounded domains. We prove the existence and the uniqueness of the solution of its variational...

With the development of multimedia network, more and more real-time multimedia applications require a network capable of satisfying QoS constraints such as delay and bandwidth bound so that the messages reach each destination node at almost the same time within a certain specified time limit. Therefore,...

Forces carries out the task to improve effectiveness of communication command, is the important guarantee of communication support ability to ascend, the fuzzy analytic hierarchy process (AHP) to evaluate communication command efficiency, to a certain degree of communication security work guide role....

A method based on fractal combined with Bior 3.7 wavelet is proposed to analyze atmospheric particulates’ fractal feature. By the use of microscope, atmospheric particulate samples were taken into digital images. After a series of image processing including Bior 3.7 wavelet decomposition and reconstruction,...

According to the difficult in selecting parameter of SVM when modeling on the gas quantitative analysis,and existing methods need long time,SVM optimized by improved grid search method was proposed to built an infrared spectrum quantitative analysis of gas.According to this method,the spectrum data of...

Aiming at the user clustering and page clustering in Web log mining and based on the analysis of K-means clustering algorithm and matrix clustering algorithm, the paper presented an improved clustering algorithm that combining fuzzy matrix algorithm with K-means algorithm. Extract compressed sub-matrix...

Stochastic resonance(SR) is one of the applications in weak signal detection. Many researchers used the combination of the traditional first-order bistable system and genetic algorithm(GA), but the output of first-order bistable system is not smoothly enough, genetic algorithm has the phenomenon of losting...

To achieve the functions of alarm direct pass and remote browsing National Electric Power Dispatching Center put forward, each substation monitoring manufacturers commonly adopted the way based on their own workstations currently, which exists some problems such as resource wasting, higher transformation...

Since the wind turbine brake is not easy to replace and repair in the high-altitude operations, it requires high reliability and high braking performance. Accordingly, a dynamic model is established for the megawatt wind turbine brake. By simulating and analyzing the braking process, the braking curves...

Aiming at the virtual network embedding problem under dynamic service request, Service Request Aware-based Dynamic Virtual Network Embedding (SRAD) algorithm is proposed. We first present virtual network embedding model, and then define virtual network construction cost according to the dynamic characteristic...

In order to improve the accuracy of feature extraction, a Multi-scale Fuzzy Entropy algorithm is proposed based on Entropy theory. The new algorithm combines the concept of Fuzzy Entropy and Multi-scale Entropy. Aimed at the shortage of Empirical mode decomposition (EMD), Index Energy is selected as...

In this paper, the noises of images taken by Cannon40D and CMOS industrial camera are analyzed both in time and space domain without outside illumination. The dark random noise associated with time is very low, which means the system noise is almost uncorrelated with time. However, system noise in the...

With the continuous development of the global navigation satellite system (GNSS) and related technologies, the research of performance testing of navigation receiver has gradually become the focus attention of the satellite navigation industry. Due to the influence of environmental factors, repeatability...

For a large set of data points, registration is time-expensive. In order to deal with this problem, we propose an improved Nearest Neighbor Searches(NNS) algorithm for 3D point clouds registration based on Graphic Processing Unit(GPU). In order to maximize the storage of data points in the memory, we...

Along with the miniaturization of mobile terminals, antenna miniaturization is the trend of the development, because of its small volume, light weight, with carrier conformal and easy to implement dual-band, multi-frequency work, and many other advantages. This paper designed a model with multiple inhibition...

The fixed clamp should be installed inside the BOP stack for sectional blockage and tubing pulling job. When there is combined string in downhole, it causes inconvenience in replacing slips of different specifications because of pressure in BOP stack. To solve the problems mentioned above, variable diameter...

The elevator being used in field application causes several problems such as low level of mechanization and high intensity of labor. Therefore, electromotion elevator is developed and tested in this paper, which works with mechanized workover equipments. On the base of traditional elevator, the safety...

With the development of society, all kinds of buildings with LED billboards constantly appear. The safety of LED billboards under wind loads is the focus for the public attention because it appears that lots of LED billboards have collapsed in the wind load and have crushed people. It is vital to study...

This paper based on the analysis of precision and ultra-precision machining of the status quo, research on its development of new materials, new technology, machine tools and other aspects. Put forward that China should take a few basic measures, think about the future development of the field.

In prediction of structural wears with the finite element (FE) approach, the geometry of FE model must be updated constantly to imitate the nonlinear wear behaviors which need a great amount of computational time. Improvement of efficiency of wear simulations becomes increasingly important due to the...

This paper presents a modular method to construct the postprocessor system for a novel hybrid parallel-serial five-axis machine tool. A hybrid parallel-serial mathematic model was introduced to analyze the structural configuration. The configuration decomposition of machine tools is employed to create...

To improve the design quality of steering system of the large wheeled harvester in China, an optimization method based on multidisciplinary design optimization (MDO) is proposed. According to the requirement of how to design and optimize the large wheeled harvester, optimal variables consisting of steering...

Contact force distribution analysis is the foundation of the load-carrying capacity analysis, the drawing of static load-carrying capacity curve, designing and selecting of slewing bearings. The static model of the single-row four point contact ball slewing bearing is established and the contact force...

Large diameter longitudinal welded pipe is the main form of energy transport, and has a wide application in the transportation field of oil and gas. In this paper, crimping forming experiment for large diameter longitudinal welded pipe was introduced, and the relationships between forming stroke, crimping...

This paper developed a taxi operation status monitoring system consists of the passenger seat sensing device, taxi passenger operation state display lamp, taximeter, on-board wireless signal transmission communication terminal, monitoring center computer management system. By comparison and logical analysis...

An adaptive backstepping neural network position controller design is presented for the electro-hydraulic servo system with mismatched uncertainties. By applying backstepping design strategy and online approaching uncertainties with RBF neural networks, a nonlinear controller for a hydraulic servo-system...

The study is focused on the verifications of a proposed polynomial stochastic fatigue crack growth model, which assuming the fatigue crack growth rate equal to a deterministic polynomial function in terms of fatigue crack size multiplied by a stationary lognormal random factor accounting for the statistical...

It is important that product size can be checked quickly and accurately on the production line. The speed and precision are slowed by traditional manual measurement and the speed based on machine vision in the paper is obviously improved. First of all, the collected image is converted into the correct...

This paper analyzed the species and composition of phytoplankton in Fushan Bay based on investigation data on June to August 2002. Results showed that there were 4 phyla, 39 genera and 102 species, including Bacillariophyta, Pyrrophyta, Chlorophyta and Chrysophyta. There were 29 genera and 75 species...

In order to analyze the flow and heat transfer characteristics of the secondary air system, a general simulation block library was developed and a characteristic analysis platform of secondary air system was constructed based on the tool box of MATLAB/Simulink. This platform could simulate all kinds...

This paper uses the casting simulation software ProCAST to simulate the production of steering axle with technology of iron mold coated sand, and corrects the corresponding process by the simulation results. Utilizing the balanced solidification principle, by increasing the number of the ingates and...

Based on flexible deformation characteristics of large diameter lamella plate in high speed milling plane, it established 9 kinds of processing technology including sequence, clamping method and cutter path. Milling experiment was carried out, and got flatness value and parallel degree of three coordinate...

Bas-relief is widely used as it expresses people’s yearning and good wishes to the future life, and gives people a sense of subtle elegance with its beautiful lines and color. Since it is hard for traditional bas-relief design to meet the demand of rapid developing science and technology, the research...

Crawling is a common phenomenon during the operation of hydraulic prop. Through analyzing the causes of crawling phenomenon, establishing the dynamic model and mathematical expression of crawling, the result is that when the minimum speed of the pillar stretch motion is higher than the critical speed,...

The wear of the middle trough of coal mine scraper conveyor, is a common fault of scraper conveyor. Starting with the causes of wear by analyzing the structure and the working condition of the chute, it indicates that the friction is the main cause of the chute wear, and abrasive wear, adhesive wear,...

China's UHF RFID band of 840 ~ 845MHz and 920 ~ 925MHz, distance of mobile communication CDMA800, GSM band near, vulnerable to interference in mobile communication system, resulting in demodulation bit error rate increased RFID tags. The interference of mobile communication system formation mechanism...

This Image segmentation is the key step of image processing transitional to image analysis. Edge detection is the most commonly used method to segment images based on gray mutation. This paper mainly introduces the method of edge detection to gradient operator and Laplacian operator.

After analyzing characteristics of remote sensing images, the Fourier transform and wavelet transform are studied in this paper. It is found that the wavelet transform provides excellent properties and is more suited for image compression. Therefore, the wavelet transform is used to perform three-level...

Approximate gradient method is improved for the maximum power point tracking (MPPT) of photovoltaic generation system. The improvements are implemented by: (1) applying constant voltage tracking method to narrow the search range when external conditions change drastically; (2) adding constraint conditions...

A new locating algorithm NMDS-TDOA is proposed, which attempts to improve the performance of node localization in wireless sensor networks. As the ranks of the nodes based on TDOA should be monotonic with their ranks based on true distance, we can combine TDOA and MDS-MAP. As a result, positioning error...

A fast and efficient inversion algorithm was suggested for high-resolution dual laterolog (HRDI) tool. The algorithm can yield reliable estimates for the depth of invasion zone and true-formation resistivity simultaneously. Both the behaviour of HRDL measurements and inversion were studied for various...

A high definition induction log (HDIL) device provides six resistivity responses with various radial detective depths. Its responses were influenced by saline mud filtrate invading into the reservoir dynamically after the formation was opened while drilling. The dynamic invasion process results in the...

The design of matching circuit for broadband underwater acoustic transducer is a key technology in sonar system. Matching circuit can reduce the energy loss of the power amplifier, extend the system bandwidth and improve the distortion of the transmitted waveform. In this paper, the theory of real frequency...

Image segmentation is an important branch of image processing. Among numerous segmentation techniques, thresholding is a very important and effective one which segments different objects using a threshold. This paper discusses workings of several common thresholding segmentation methods and summarizes...

In power system, voltage quality has always been an important indicator to evaluate the reliability and stability of power supply. In engineering, to solve the problem of voltage drop at the end of power line, power capacitors are often used to maintain voltage stability. Taking a reactive compensation...