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In cognitive radio system, secondary user’s self-sensing properties to the spectrum occupy is the start and basis of the whole cognitive process. The classical analysis of self-sensing properties has the hypothesis that the Primary user signal occupies the whole sensing slot. However, in the actual,...

In order to solve special shape pipe automatic welding problem,a new decoupling control system has been introduced,which is constructed on PID and RBF neural network.Input data is from non-contact displacement sensor and angle sensor,and output data has been used to control servo motor which always used...

The ground fissure is hidden hazards of ground deformation.Survey work to crackisthe basicofcontrol measures. Geological radar detection as an emerging technology has advantages of rapid, continuity and visibility; according to a practical example of the detection mechanism of landslide cracks, summed...

Based on the analysis of problems encountered by PulsON@ 410 RCM modules when used in substation accurate locating, such as automatic discovery of beacons, a self-organizing protocol is put forward to support the creation, maintenance of beacons network. Also solutions from different aspects are presented...

Key problems in view of the urgent long-endurance uav, the research of the application of bionics to no one wing design. With the wings of a certain unmanned aerial vehicle as the research object, is good at gliding gull for bionic prototype. Design imitation airfoil seagull flat wings and wing tip winglet...

To transmit data reliably and effectively in deep space network, a protocol called NCSTP was proposed, introducing network coding mechanism into space communication. However, the NCSTP cannot make an effective response to the burst packet loss characteristic in InterPlaNetary (IPN) network. Therefore,...

Aiming at exploration and development capacity, it is usually hard to achieve effective utilization and balance by using just one algorithm, which will influence the solving accuracy and efficiency of the algorithm accordingly. This thesis applies particle swarm optimization (PSO) to discrete multi-objective...

Ammonia and HTT were compounded and tested as a novel preservative system for concentrated natural rubber latex (CNRL) to replace traditional preservatives. The preservation effects and the viscosity of prevulcanized CNRL were measured. After preservation treatment, the drying characteristics, the mechanical...

Pocket closet is mobile application software developed based on Objective - C language, which can help users manage a wardrobe. When users don't know how to match clothes, the software recommends collocation through user testing results; Users don't have to dig out tie-in dress, but through the software...

With regard to the existing test case priority algorithm rarely focusing on the static covering condition of test case and other design information, as well as the testing person need to online collect relevant information about each statement in the procedure, and a higher dependence on code information,...

By the way of build a new model to intuitively response the temperature changes in the refining furnace, using the results of the temperature changes to control the output of the current, and achieve the purpose of accurate control and not waste resources. Combining temperature prediction with this model,...

The water polluters of Liao river basin in Jinzhou is elected preliminarily basing on the basin of the key water polluters of Jinzhou city, combining with the principle of polluters screening and the computing method of equal standard pollution load, optimizing and assessing the indexes which involves...

In this paper, the author discussed the current popular the grid computation technique and the virtualization technology, analyzed and concluded characteristic of two technologies. Then, VNET has been proposed, which can add the virtual machine to the network efficiently. It can dynamically modify its...

In this work, the ground-based GPS data in the West of Taiwan Strait was used to remote sense atmospheric Precipitation Water Vapor (PWV) in Fujian, and dynamically analyzed the spatial pattern change characteristics of PWV, combined with meteorological data, in order to quantitatively analysis the relationship...

In recent years, infrared trigger cameras are widely employed in the fields of wildlife monitoring and protection as they can collect massive image data. It is of great realistic significance about how to conduct automatic processing of these image data and extract key information. This paper has a detailed...

Image processing is widely used in many fields,in image enhancement processing,traditional image enhancement method,such as histogram equalization, wavelet coefficient enhancement,and so on.Although these methods achieved good image enhancement performance,however,noise is amplified during image enhancement...

Because of fast moving of VANETs node and dynamic topology structure, the traditional wireless self-organized routing protocol is difficult to be directly applied in VANETs. Therefore, the routing protocol of hybrid traffic information perception is proposed. Through the collection of real-time traffic...

With regard to the existing test case priority algorithm rarely focusing on the static covering condition of test case and other design information, as well as the testing person need to online collect relevant information about each statement in the procedure, and a higher dependence on code information,...

In this paper, the vector control theory of PMSM is studied, and the double closed-loop control system of PMSM is designed. By analyzing the mathematical model of PMSM, vector control principle and control strategy based on vector control, the control strategy and realization method of this paper are...

This article proposes a tracking algorithm based on mean shift and particle filter according to the characteristics of moving vehicles. Firstly, the algorithms establish auto target motion model that the core is RGB color histogram. Secondly, using the Bhattacharyya distance measures similarity of particle...

This paper investigates the microstructure and friction-wear behaviour of Scapharca subcrenata in order to obtain useful information regarding the tribological properties of composite materials. The experimental results have showed that the relationship between the friction rate and surface roughness...

This paper investigated the microstructure and composition of Argopecten irradians through X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and energy spectrometer (EDS), and measured the hardness and tribological properties of Argopecten irradians using nanoindentation and...

As a solid state joining process, friction stir spot welding (FSSW) has a strong potential to be applied in the aerospace and automotive industries. Mechanical property of the FSSW joint takes important influence on connection performance. In the present paper, numerical simulation model of mechanical...

The present study reports that a modified coaxial electrospinning process, which was successfully carried out to control the diameters of shellac fibers. With a Triton-X100 in ethanol as sheath working solution and shellac ethanol solution as a core electrospinnable fluid, the coaxial electrospinning...

It established APD(Air power drive) starting drive dynamics model. The APD system is put forwarded to improve the vehicle starting drive efficiency. We analyzes the APD working principle, adds a air power and researches for the basic simulation of control model with slip-rate based on PI control theory....

In order to improve the accuracy of fault diagnosis, this paper puts forward a method of wavelet packet combining neural network fusion. By wavelet packet decomposition and reconstruction of normal and fault vibration signals of aero-engine rotor, the feature vector from the vibration signal can be extracted....

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,...

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...

Currently, the Top-k keyword search of uncertain XML returns only the top k probability value of the root node. We need further processing to constructed the sub-tree that it meet some certain conditions. To solve this problem, this paper defines a new Top-k query semantics SRRT-Top-k that based on the...

As to solve the issues of insufficient training data and initial parameters sensitive in existing protocol anomaly detection based on hidden Markov model, presenting a new protocol anomaly detection method based on improved genetic algorithm and hidden Markov model. First, the local competitive selection...

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...

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...

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...

Fluid-structure coupled methodhas beenapplied to research the aeroelastic stability of compressor blades, and the effects of high-low altitude on blade flutter characteristics are investigated through comparison. Results show that, thesefrequenciescorresponding to displacement, elastic strain of blade...

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 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...

Based on the investigation data on Cu contents in different seasons in 1983 in surface waters in Jiaozhou Bay, we analyzed the contents, pollution level and distributions of Cu. Results showed that Cu contents in May, September and October were 2.47-20.60 g L-1, 0.86-4.86 g L-1 and 0.77-3.00 g L-1, respectively....

Based on the investigation data on As in surface and bottom waters in the bay mouth of Jiaozhou Bay in 1983, this paper analyzed the seasonal variations, vertical variations and horizontal distributions of As. Results showed that As contents in surface waters in different seasons were in order of summer...

Development didactics engineering subjects based on the results and conclusions research studies focused on the use of didactic potential of the technology deployed in industrial environments. The possibility of good careers in the field of construction and technical preparation of engineering companies...

This study using the event related potential (ERP) experiment means, researches the coal mine production emergency scenario miners in emergency response electrical experiments, and designs experiment of miners’ emergency information decision response. According to possible accidents and disasters in...

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.

Perovskite-type cube structure LaMnO3 nanofibers of approximately 50~100 nm in diameter were synthesized via Sol-Gel processing and electrospinning technology after calcined at 900 by using polyvinypyrrolidone (10 wt %PVP) as complexing agents. The nanofibers was characterized by means of scanning electron...

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,...

Video Shot segmentation is the key technology in content-based video retrieval and browsing, and which will directly affect the results of video retrieval. In view of the problems that the traditional shot segmentation algorithm is complex, the feature of video frame is not ideal, and the segmentation...

based upon the influence of mine position distribution error, adjacent mine space cannot fulfill the task of actual combat. this paper builds the model of adjacent mine space distribution regularity under two conditions of the same voyage and different voyages. In combination of examples, a series of...

The relay enabled broadband wireless access is based on the IEEE 802.16j standard and acts as a promising technology to construct the next generation high speed metropolitan area networks. However, the link schedule and the relevant resource allocation, which is a key challenging issue in such networks,...