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The application of structural health monitoring (SHM) based on fiber Bragg grating (FBG) for airships is investigated. In order to verify the validity of the FBG-based SHM in the field of airships, a qualitative strain monitoring experiment for ZHIYUAN-1 airship nosecone has been carried out. A commercial FBG interrogation system (Micron Optics sm130) is used in this experiment to measure the strain...
Dendritic α-Fe2O3 micropines and octahedral Fe2O4 microcrystals with uniform structures have been successfully synthesised through a reactable ionic liquid process in the presence of 1-butyl-3-methylimidazolium ferricyanide [Bmim]3[Fe(CN))6] ionic liquid. During the reactive process, ionic liquid [Bmim]3[Fe(CN)6] acts as solvents, templates and direct reactants for the fabrication of dendritic α-Fe...
There are relevance and redundancy of the feature words in the text vector space, so we proposed a text-reducing method based on the improved KNN algorithm in this paper. Vector polymer theory and feature selection methods were used to reducing the dimension of vector space. Feature words would have more ability to represent categories after feature selection. Experiments proved, the improved KNN...
Whether the category template is good or not is directly related to the precision of the information filtering in the system. And the classification system may often be changed. This article presents an algorithm which modifies the category template according to the feedback documents. Experimental results show that this algorithm can make category templates much closer to the real ones as soon as...
This paper gives an analyzing & discussing of Depth-first Search technology of both FCR and VCR in searching without information, and points out that, properties of FCR & VCR on searching without information. And then, it introduces a novel realization method of Depth-first Search in problem solving which sometimes we should think simultaneously over the synthetic technique combining intelligent...
In information system of Computer Networks, there are many computer viruses can do fatal damage to some individual computer systems; the ability to damage is basically decided by their mechanisms of regenerating, not decided by the longer computer virusespsila program or the shorter ones. Today, many of mechanisms and much of computer virusespsila ability to damage that, quite an initial knowledge...
Field programmable gate array (FPGA) was a new material programmable logic units in end of the 20th century, FPGA was with some properties such that, large memory of capacities, short delays of time, improvement able & flexibilities etc. On the basis theory of neural fuzzy system of Networks (NFSN), this paper gives a FPGA method of DNMA (Dynamic Numbers Measuring Algorithm) with VCN (Variable...
Breadth-first Searches (BFS) were both traditional & classical blind searching technique in artificial intelligence (AI). Variable Carrying Numbers (VCN) is a broad concept of numbers in number theory. AI-fuzzy VCN (IFN) is a mixture numbers with different Figures' Module (FM) in a same n-Figures number. Fixed Carrying Numbers (FCN) is only ones of special VCN. This paper makes an analyzing &...
VCN was a novel broad concept of numbers that created by YE Qiu-Sun in 1995. FCN is only some special circumstances of the VCN. Todays, in International Mathematics and Computer Science, the basic reasons of puzzled realm in which numbers have been deeply studied and developed at a standstill are, all researches on numbers only confined to a same computation rule of the FCN, we call it FCR. But the...
A new UWB (ultra-wideband) modulation scheme called L-ary UWB-TH-AMPPM (Time hopping Ambipolar multi-pulse position modulation) was proposed to get a better UWB communication performance, and the ECWC (extending constant weight code) was introduced to construct the AMPPM signal. The comparison between AMPPM, SPPM (single pulse position modulation) and BPPM (biorthogonal pulse position modulation)...
Based on the research direction and scope of ergonomics, and according to the keywords of papers raised in all areas of ergonomics from 2001 to 2005, this paper analyzes the content and characteristics of ergonomics in recent five yeas of 21st century through the understanding and comparison on the searched papers, and do some development on domestic and overseas hotspots of ergonomics at present...
In this paper, we propose a new modulation scheme called L-ary multi-pulse position modulation (L-ary MPPM) for ultra-wideband (UWB) high data-rate wireless communication systems. MPPM is an improved pulse position modulation(PPM) by employing multiple pulses and constant weight code to provide a better system performance with comparison with L-ary single-pulse position modulation (SPPM). The error...
A three-dimensional integral model of hollow spherical distribution is proposed to evaluate the UWB interference effect on 3G systems under different UWB emission power limit regulations of FCC, ETSI, and Japan respectively. The relationship between UWB device density and the link budget margin of 3G systems is established to measure the UWB interference effect on 3G systems
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