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Liquid water is a strong absorber in THz range, making the presence of water a nuisance when collecting measurements within this frequency regime. Here, we experimentally demonstrate the generation of broadband THz waves from liquid water with a femtosecond laser. The signal is obtained when a high-intensity laser beam is focused within a water film. This THz signal is distinguished from the signal...
For the problem of limited rule bases and inaccurate matching of Chinese Natural Language Processing (NLP), this paper presents a new NLP method based on Semantic Structure Tree (SST). Through establishing SST, this paper calculates the evaluation index to find out the most suitable semantic combination from all possible SST. In order to improve the semantic recognition recall and precision, this...
To fast detect abrupt change from large-scale time series, we propose an improved method based on the Ternary Search Tree and modified Kolmogorov statistic method (TSTKS, for short). First, two ternary search trees are built by adding a virtual middle branch into existing binary trees; and then the multi-channel detection is implemented from the root to leaf nodes in terms of two search criteria....
In a P2P video-on-demand (VoD) system, the asynchronous characteristic of users' random seeking makes data sharing among peers more challenging, and raises very high capability requirement of the source video server. In this paper, we propose adding one more server in a P2P VoD system to support the random seeking operations and investigate the capacity dimensioning problem for the new server. We...
This paper implements a PLC(programmable logic controller) based virtual instrument that performs measure and control in mechanical characteristics test for flow control throttle in gas pipeline. The development of the instrument is based on PLC and LabVIEW IDE, which features a novel combination of leading industrial control tools to construct the virtual instrument. Since OPC(OLE for process control)...
Effective use of magnetostrictive smart structures in trajectory tracking with a precision under sub-micron level is hindered owing to the highly nonlinear magnetic hysteresis of the giant magnetostrictive actuators (GMAs), especially when the mechanical loads and excitation rate varied. In this paper, a generalized dynamic Preisach operator is proposed for describing the dynamic hysteresis nonlinearity...
This paper presents a method of constructing the self set of the intrusion detection system which based on the immune algorithm. It combined the niche technology into the clonal selection algorithm to construct the self set. Keep the diversity of the data of the self set. Comparing with the traditional methods which use a priori knowledge and random selection, the new method can reflect more characteristics...
A research on available resources management model (ARMM) of cognitive networks based on intelligence agent (IA) proposed in this paper. In cognitive networks (CNs) environment, it is important to master various resources information of network accurately, in the guarantee resources information completeness, the uniformity, the stability, above the reliable foundation, overall evaluation user quality...
Singular points detection, a crucial step for fingerprint identification system, is accurately robust, and reliable. In the processing of the fingerprint image matching and classification, many method use singular points to align two fingerprint images to surmount the problems about rotation and translation. The performances of the fingerprint recognition system rely on the effect of singular points...
The demand of virtual database in implementation process of the virtual university were discussed, and further focused on analyzing a large scale image database for the virtual university in the necessity of demand for image retrieval. On this basis, a vocabulary tree image retrieval algorithm is applied to the virtual universities. Vocabulary tree is an efficient search data structure based on visual-keywords...
The vehicle routing problem with simultaneous delivery and pick-up service (VRPSPD) was considered in this paper. A hybrid heurictics was proposed to determine the optimal set of routes to totally satisfy both the delivery and pick-up demand of the customer population. An extensive numerical experiment was performed on benchmark problem instances available in literature. It is found that the proposed...
With the development of infrared technology and the further application in electric power system, it plays a more and more important role in electrical equipment fault diagnosis. Improving the accuracy of infrared diagnosis technology and its application effect is of important practicality value to the research of infrared diagnosis application technology. From the point of electric power system daily...
With the development of infrared technology and the further application in electric power system, it plays a more and more important role in electrical equipment fault diagnosis. Improving the accuracy of infrared diagnosis technology and its application effect is of important practicality value to the research of infrared diagnosis application technology. From the point of electric power system daily...
The marine diesel engine is a complex system, which has the important function to guarantee the marine security. There is strong coupling relationship among the mapping process of fault diagnosis. An approach of intelligent fault diagnosis based on fuzzy neural network optimized and trained by the genetic algorithm (GA) was proposed in this paper for this system. The structure and the parameters of...
CrN films were deposited using Multi Arc Ion equipment on M35 steel. The experiment results indicate that the flow ratio of N2 to Ar play an important role in the properties of films.
Network coding has been shown to be useful for throughput and reliability in various network topologies, under a fixed-rate, point-to-multipoint wireless network model. We study the effect of introducing a wireless network model where link capacity depends on the network geometry and the signal to interference and noise ratio. In particular, we compare strategies with and without network coding on...
In this paper, on the basis of end-to-end principle, we propose a mobility management scheme to solve the NAT issue. Furthermore, since different communication technologies own different characteristics, during a vertical handoff, a well-behaved mobility management system should adapt an ongoing connection to different communication systems. In this paper, we also propose a handoff-aware TCP adaptation...
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