Allocated Spectrum band has always been a limited resource; being later a more challenging issue due to the growth of user demands. The past decade is marked by important changes in spectrum access through especially cognitive radio technology. Here, spectrum access issue can be studied in all the different...

As the traditional network defense is built on intrusion detection and passive protection, which is weak at dynamic response. The network deception technology in active protection is analyzed, and a network deception system based on active security model is proposed in this paper. This system implements...

In the security monitoring system, in order to realize the multi-angle and different positions of the camera monitoring the camera monitoring, a pan tilt zoom (PTZ) module is used. This paper describes the PELCO-D protocol of PTZ and serial communication firstly. Then it achieves control the of PTZ and...

This paper uses an industrial control product as a teaching platform, the necessary foundation of theoretical teaching and practical exercises which is combined, so that students quickly grasp the embedded industrial control system software and hardware, the basics of the system hardware and software...

Distributed optical fiber sensor can acquire the information of physical field along time and spatial continuous distribution. It plays an important role in long-distance oil and electricity transmission and security. In this paper, the author introduced the universal steps in triggering pattern recognition,...

In this paper, we propose a 3D tree simulation method which is based on fractal theory and combined with the morphological characteristics of trees. By modifying a few simple parameters we can achieve the realization of different types of 3D tree automated generation. According to the tree structure...

In many practical data mining applications, unlabeled training examples are readily available but labeled ones are fairly expensive to obtain. Therefore, as one type of the paradigms for addressing the problem of combining labeled and unlabeled data to boost the performance, active learning has attracted...

Inspired by the research of human visual system in neuroanatomy and psychology, the paper proposes a two-way collaborative visual attention model for target detection.In this new method , bottom-up attention information cooperates with top-down attention information to detect a target rapidly and accuractly....

This paper introduces the design and implementation of a large points FFT acceleration unit of multi-processor system based on FPGA. It introduces radix-2 DIT-FFT algorithm and the features of hardware platform. It analyzes the FFT acceleration unit overall and divides it into several modules. Then hardware...

The stand or fall of database design was related to an information management system was really practical. Analysis of user demand from the library management information system, the design and implementation of the database part in the system development process was discussed as a key point, and the...

People requirement network reliability and security more and higher as the information age of the Internet to promote the rapid development of business and Internet using unceasingly thorough, network equipment, network structure is complicated. This paper design and implementation of a monitoring system...

Currently, P2P is a very popular network model. Compared with the traditional model, it bears the advantages of high transmission speed and no centralization etc, and it performs much better in the cyber source utilization and server bottlenecks elimination. This article, starting from the basic principle...

The GaN HEMT is widely used in high-frequency aspects, use the T-gate to reduce gate resistance is one of the most effective methods to improve the the device maximum oscillation frequency (fmax). But fmax is very sensitive to T-gate size, improper selection may reduce fmax, Therefore, in order to reduce...

In the service-oriented environment, the composition of multiple web services is always used to satisfy the given request. To meet the request, the compositions of the services are various. Aim at such difficulty, described with the environment ontology, the relative theory of Petri net is proposed to...

One OCDMA PON system is discussed in this paper. Multi-length Two-Weight Carrier Hopping Prime Codes is selected as encoder scheme, encoded information is transmitted through Optical fiber. Hard Limiter is utilized in receiver terminal to ensure lower bit error rate. Simulation shows that it can be used...

With the rapid development of Internet, e-commerce had been widely using by more and more people, so had shopping online . The J2EE architecture was adopted in this paper. An florist’s shop online system was designed and implemented based on the analysis of the actual needs of users. Through running...

This article analyzes the accidents of power grid in some domestic region to discuss the security problems existing in the power grid Energy Management Systems (EMS). Combined with the security requirements of EMS, the method of improving EMS security based on SOA is proposed and the involving key technologies...

The temperature and thermal stress distribution on BK7 glass was numerical simulated by MATLAB according to heat conduction theory. Research has shown that the laser pulse number, spot radius and pulse width can change the extent of the damage threshold for BK7 glass. The results shown the damage threshold...

The early warning can constantly improve the monitoring and management of the hazardous sources to realize advance prevention and control. Many early warning methods do not predict and imitate the hazard sequel and the early warning information in incomplete. This essay analyzes and studies the early...

The methods for subsynchronous oscillation mitigation based on SVC and STATCOM are analyzed in this paper. According to the IEEE first benchmark model, the electrical damping coefficients respectively provided by SVC and STATCOM connected at the generator terminal, as well as positive damping condition,...

The rapid development of computer network technology and information technology, brings greatly facilitate and enrich people's lives for information transfer and fast access, improves work efficiency. At the same time, the network information security is followed. How to ensure the network information...