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Data fusion is one of the research hotspots in the field of wireless sensor network. In allusion to the problem of excessive energy consumption of existing fusion methods, a data fusion scheme with minimized energy consumption is proposed in this article on the basis of the compressed sensing theory....

Volatile phenols are a class of protoplasmic toxicants which have caused inevitable environmental problems in many sea areas. This paper analyzed the content, pollution level and distribution of volatile phenol in bottom waters Jiaozhou Bay in May, September and October 1983. Results showed volatile...

This paper analyzed the contents, distributions and pollution sources of As in Jiaozhou Bay waters in 1983. Results showed As contents ranged from 0.19-4.89 g L-1,in the whole year, and were lower than Class I for As (20.00 g L-1) in National Standard of China for Seawater Quality (GB3097-1997). There...

We analyzed the spatial distributions and seasonal variations of volatile phenols in the bay mouth of Jiaozhou Bay in May, September and October in 1983. Results showed that volatile phenols contents were changing by means of vertical water’s effect. Volatile phenols contents in surface waters were in...

Today, Advanced Persistent Threats have become typical network security threats. However, traditional methods of defense such as rule matching, virus database and vulnerabilities database can only reflect the characteristics of the known attacks. For the unknown APT attacks hidden inside the system,...

The existing security policy description languages can’t support distributed policy self-management and have some problems in the aspect of describing capability, extensibility, portability and other issues. Against these problems, this paper proposes a security policy description language SPDL for distributed...

A communication network can be modeled by a graph, whose vertices represent the nodes and edges represent the links between sites of the network. Therefore, various problems in networks can be studied by graph theoretical methods. The vertex integrity, the edge-integrity not only give the minimum cost...

Power Enterprise Operational risk is a major issue for the power companies. Based on the study of operational risk index system of domestic and international power companies, using the Delphi method to determine the power of operations risk assessment index, then using AHP and fuzzy set theory to determine...

Intelligent circuit breaker is one of the most significant devices in the electric system, and its stability and reliability are quite significant for the operation of the power grid. An online monitoring and fault diagnosis system based on the vibration signal of virtual instrument technology is proposed...

The automation and intelligence of the overhaul technology are related to the level of the whole substation automation and intelligence. Aiming at the problems of low automation level of substation high-voltage equipment overhaul, this paper mainly studies robot-based live overhaul technology. The design...

In this paper we propose one method for mechanical vibration signal analysis. The given mechanical vibration signal is firstly decomposed into several intrinsic mode functions (IMFs) by the empirical mode decomposition (EMD) method. The Hilbert transform of each IMF, calculated by a recently developed...

This paper presents a terrain rendering technique for large, textured terrain, which uses Parallel-based error metric. In a preprocess, the domain was first tiled and computed into a nested geometric space error map based on geographic theory, taking the advantage to save displaying memory with terrain...

For solving effect and real-time performance problems of lunar surface image, the paper proposed an eliminating brightness differences algorithm of lunar surface image by correlation of color components fitting gray level map function. Feature points were obtained by matching in process image, which...

The installation tool for SF6 circuit breaker closing spring is characterized by: diameter of the annular outer end cap is larger than that of the concentrically arranged annular inner end caps; there are multiple circumferentially evenly arranged support rods fixed between them; there are also many...

Fault simulation is an important part of power system dynamic simulation, fault models in fully dynamic simulation software of power system simulates all kinds of symmetric and asymmetric complex faults by fault branch admittance matrix. Handling multiple faults and random faults by admittance matrix...

The isolating switch is a device of isolating voltage in order to ensure the safety of the maintenance work of high voltage apparatus and equipment. It is installed by bolts on the mounting rack of electric equipment. The isolating switch is exposed outdoors and always affected by wind, rain, dust and...

In today's transmission and distribution system, large transformers are widely equipped with on-load tap changer (hereinafter referred to as OLTC) to ensure the voltage quality of the system and users. Due to the complex mechanical structure and high operation frequency, there are often abnormal situations...

Real-time display system for remote training consists of video recorder with wireless transmission module, relay router, display terminal and video recorder carrier with multiple wireless transmission modules. The display terminal includes projector, desktop, tablet computer or smart phones. The video...

With the large-scale application of power electronics technology and computer technology in grid operation, automation level of the grid production and operation maintenance in China is increasingly higher, which also proposes higher requirements on the professional theory and skills of frontline staff...

This article mainly tells the development of power system relay protection technology, application status and application prospect in the future, and for the relay protection device equipment type selection, function analysis, this paper introduces the current mainstream of relay protection technology,...

Power system is a complex and huge network composed by power generation, transmission, substation and distribution, of which substation is an important part. In this aspect, the intelligent degree of substation is especially important. The 220kV substation of high intelligent degree is built in Hejia,...

This paper analyzed the content and distribution of Arsenic (As) in bottom waters in the bay mouth of Jiaozhou Bay in May, September and October 1983. Results showed As contents ranged from 0.15-2.30 g L-1 in bottom waters in the whole year, and were more lower than Class I for As (20.00 g L-1) in National...

Information technology penetrates into education field continuously with development of information technology. Information technology is playing an increasingly important role in education. Information technology has changed traditional mode of education, and created a brand-new learning environment...

A parallel computation model is provided of dynamics and dissipative tunneling in a symmetric quartic double well potential. The numerical parallel solution for the position autocorrelation function obtained through the Wigner–Fokker–Planck equation is compared well with numerically exact results.

Focusing on the uncertainty of the environment, a grid map building method based on the multi ultrasonic sensors is provided. Firstly, the single ultrasonic sensor grid model is constructed by dividing the detected area into three regions. Then the evidences which are needed to fuse are self-adaptively...

Call center is one of the most important means for telecom operators to provide after-sales service for customers. Every day, call center can produce a large number of voice data. But these data do not bring significant value to the enterprise. Recent years, the development of intelligent voice technology...

Traditional matrix algorithm endures advantages of low requirements in FTU, high accuracy in Single–supply and radiation distribution network and so on. However, it will meet with erroneous judgment when it is used traditional matrix algorithm as long as it inserts with distributed generator. This article...

In this paper, based on complex network theory, a topology model was proposed which is more accord with the nature of wireless sensor network. Actually, each node's actual location is crucial, in addition, the node energy consumption and communication distances between nodes are inseparable, so we tried...

The IEEE 802.16m based broadband wireless access is a brand-new technology to provide high speed and wide range communications for wireless users. However, how to exploit the optimal utilization of the radio frequency bands resource in such networks is a big challenging issue as it covers the radio channel...

In order to improve the result of text dimension extraction, a text dimension reduction method which is based on CHI and TF-IDF is designed and realized. News websites on the Internet provide news articles, through the page analysis based on SVM and application method designed based on CHI and TF-IDF,...

Through the analysis on the cases of the transmission line gallop over the years, the meteorological condition and the geographical location have a dramatic effect on the gallop phenomenon. And the conductor gallop can be evaluated by the thresholds of the weather factors and the degree of the terrain...

Heating load forecasting of municipal steam heating system is an important part of the smart city. According to the forecast results, heating companies can arrange production reasonably and provide heating uniform and stable to improve energy efficiency. For the features of the time series of heating...

The engine idle speed control is one of the most important challenges in the engine control fields, essentially the engine idle speed control is a nonlinear, time-varying, complex and uncertain dynamics control problem, the present study the idle speed control problem for improve the gasoline engine...

The modeling method is commonly used in the simulation of engine at home and abroad, the engine which is used for auto control and performance analysis model. It includes static and dynamic modeling methods, such as engine nonlinear autoregressive model, the average model, the chart model and hybrid...

With the development of power electronic technology, harmonic load is one of the main reasons for damage to the power quality of the limited capacity power system. Firstly, the functional requirements of harmonic load model in the three-phase four-wire isolated power supply system are carried out according...

A gray level image segmentation algorithm is proposed based on Average Intensity Project (AIP) and shift Gaussian model for gray level images with connection between thread and area with similar gray level. The evaluation is performed on 30 gray level images, and the results show area overlap measure...

this article describes a method of general data interface’s design and implementation based on IEC 61850. This method puts interface data of communication and other function components in real-time database of the equipment, which also sets up a mapping method of the correlation of IEC 61850 and real-time...

In debugging and testing process of the intelligent substation process level intelligence unit ,it need to build multiple sets of test environments, with the wiring complexity and low efficiency. For this case, we design of a portable intelligent substation testing device based on PXI bus, describe the...

The paper takes side panel cracks of large-scale vibrating screen as research object. The side panel vibration signals have been de-noised and the wavelet packet energy feature has been extracted in Matlab with wavelet analysis theory. Meanwhile, the fault characteristics is sent to genetic neural network...

Since conventional methods cannot resolve the complex problem of airborne equipment development, the Hall for Workshop of Meta-Synthetic Engineering for the demonstration of airborne equipment development is built in this paper to improve the scientificity of the demonstration of airborne equipment development,...

When the system model and noise statistical characteristics are known, the conventional Kalman filtering algorithm is suitable. When the noise statistics are unknown and large initial misalignment angles results in system nonlinear, the application of liner error model and Kalman filtering algorithm...

To improve the development of informational support of equipment, constructed the logistic support informational system is one of the choice. In order to establish informational system which adapt to the requirement of equipment, how to confirm the business function of logistic support informational...

With the development of electromagnetic simulation technology, demand for electromagnetic radiation sensor is improving. The reasonable design of transmitter electromagnetic simulation technology has become a key. In this paper, the curved radiator of the electromagnetic radiation field by finite element...

Osteopontin (OPN) is a kind of phosphorylated acidic glycoprotein, human beings' osteoclasts, macrophages, T cells, and vascular smooth muscle cells can secrete OPN, the gene is located on chromosome 4q13. OPN has a function of adhesion to protein, which can be combined with CD44, integrin v 3 and v...

This template explains Haplotype assembly problem is one of the most important problems in molecular biology and life sciences. Computationally, the key work for this problem is to divide the aligned sequence fragments into two disjoint clusters and then to reconstruct the corresponding haplotypes from...

For capacitor shunt placement the proposed methods do not consider the following conditions; there are few measures and the first compensation points are easily over compensation in distribution networks. So this paper proposes a practical method that can full of utilize the available measures and avoid...

The sealing detection technology for no leak detection interface specimen was introduced, such as bubbles leak detection, back pressure leak detection, advance helium leak detection, fluorescence permeation leak detection and inside helium source leak detection, including their principles and specialties....

For the problem of space spectrum cannot reserve the original time-domain signal under specific direction after beamforming, a method of primitive signal estimation based on the results of beamforming is proposed. The method proposed is based on the traditional extrapolation, and can be used to estimate...

The measurement accuracy of the articulated coordinate measuring machine (AACMM) is different in different sub measurement regions. In order to improve accuracy, The method for dividing and merging of sub measurement region based on Density-Based Spatial Clustering of Applications with Noise (DBSCAN)...

Based on the variable forward-swept wing configuration, this paper utilizes a variable forward-swept wing mechanism with a double slideway, which makes it possible for the aircraft to switch among orthogonal wing, forward-swept wing and delta wing freely. The general configuration of the variable forward-swept...