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2nd International Conference on Bioinformatics and Biomedical engineering, iCBBE 2008

作者： Li, Fangwen Wu, Xiaoai Wu, Jianfeng Xu, Xiaohong Ma, Songjiang School of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan 411201 China School of Materials Science and Technology Wuhan University of Technology Wuhan 430074 China

ISBN: (纸本)9781424417483

Adsorption kinetic for oil in the oilfield produced water (OPW) onto modified porous ceramics filtration media (MPCFM) in fixed bed column was studied. Porous filtration media was modified with containing hydrogen silicone oil (CHSO). The effects of important parameters, such as filtering velocity, initial oil content and filtering layer thickness, on oil removal were discussed. The experimental column data were fitted to Yoon and Nelson model equations using linear regressive analysis, next, kinetic parameters were figured out and oil removal mechanism was analyzed. All the results suggested that reducing filtering velocity, increasing oil content and filtering layer thickness make for oil removal, and mechanism of oil adsorption removal be wetting adsorption coalescence. Farther, adsorption of oil onto filtration media followed Yoon and Nelson kinetic model well by entirely fitting (at low and middle oil content) or stepwise fitting (at high oil content). © 2008 IEEE.

关键词： Adsorption

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Construction and characterization of the transformation-competent artificial chromosome (TAC) libraries of Leymus multicaulis

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science China(Life sciences) 2008年第7期51卷 604-613页

作者： XU YueYu 1,2,3,ZHOU YuLei 4,5 ,SONG LinLin 6 ,ZHANG Yan 3 &ZHAO MaoLin 1 1 Beijing Agro-Biotechnology Research Center,Beijing Academy of Agriculture and Forestry science,Beijing 100097,China 2 Department of Chemistry and Chemical engineering,hunan Institute of engineering,xiangtan 411104,China 3 college of Life science,Capital Normal university,Beijing 100037,China 4 college of Life science,Zhongkai university of Agriculture and technology,Guangzhou 510225,China 5 college of Grassland science,Gansu Agricultural university,Lanzhou 730070,China 6 Department of Biology,Henan Institute of science and technology,Xinxiang 453003,China Beijing Agro-Biotechnology Research Center Beijing Academy of Agriculture and Forestry ScienceBeijing 100097China Department of Chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan 411104China College of Life Science Capital Normal UniversityBeijing 100037China

Transformation-competent artificial chromosome system is able to clone and transfer genes efficiently in *** order to clone genes highly tolerant to barley yellow dwarf virus(BYDV),Aphids,drought and salt from Leymus multicaulis,the two TAC genomic libraries I and II were constructed in vector pYLTAC17 and pYLTAC747H/sacB,which contain about 165000 and 236000 recombinant clones *** genome coverage of the two libraries was totally estimated to be about 3―5 haploid genome equivalents,as size selection of genomic DNA fragments was approximately from 9 to 300 *** of the genomic libraries were collected as bulked pools each containing 500 clones or so,stored in twelve 96-deep-well plates and then were gridding in triplicate onto a high-density colony hybridization filter with a 3×3 pattern using a GeneTAC?G3 arraying robot after being transferred manually into three 384-well *** 2501 and 2890 clones of Library in pYLTAC17 and in pYLTAC747H/sacB were stored individually in fourteen 384-well plates and then were automatically gridding in duplicate onto a high-density colony hybridization filter with a 6×6 pattern after a replication of *** positive clones were detected by using the probe glutahione reductase gene of *** libraries constructed here can be used to isolate genomic clones containing target genes,and to carry out genome walking for positional *** the target TAC clones were isolated,they could be immediately transferred into plant genomes with the Agrobacterium system.

关键词： Leymus multicaulis megabase-size DNA transformation-competent artificial chromosome(TAC) genomic library

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Wireless sensor networks of battlefields hotspot: Challenges and solutions

Wireless sensor networks of battlefields hotspot: Challenges...

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6th Intl. Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, Wiopt 2008

作者： Alsharabi, Naif Li, Ren Fa Zing, Fan Ghurab, Mossa College of Computer and Communication Engineering Hunan University Hunan Changsha 410082 China College of Computer Science Zhejiang University Zhejiang Province Hangzhou China

ISBN: (纸本)9789639799189

In recent years, a lot of research is focused on wireless sensor network applications, which is focused on field of performance, security, and energy. This paper addressed the difficulties and challenges facing the wireless sensor networks on the battlefield. Which is often vulnerable to attacker's networks either in the data or corrupting control devices and attempt to consume a lot of energy by sending a large quantity of useless packets, which contributes to excessive consumption of energy and leads to exit nodes from work. Since technology has become widespread on battlefields at the present time, then the sensor nodes are vulnerable to attackers from both sides. This research discussed many challenges and gave appropriate solutions. The simulations showed that these solutions can help secure data and saved 40% of energy consumed.

关键词： Sensor nodes

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A Key Distribution from Pairing for Wireless Sensor Network

A Key Distribution from Pairing for Wireless Sensor Network

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Bin Zhu Jun'Guo Liao School of Computer Science and Engineering Hunan University of Science &Technology Xiangtan Hunan China

The advent of Identity based encryption has enabled a wide range of new cryptographic solutions for wireless sensor network. In this paper, a scheme named KDBSP is given to distribute symmetry key in wireless sensor network KDBSP comes from Smart protocol based on pairing. After some analyzing, KDBSP has some advantage on storage, computation and communication by comparing with the other scheme for establishing share key in wireless sensor network.

关键词： Wireless sensor networks Identity-based encryption Public key Elliptic curve cryptography Protocols Public key cryptography DH-HEMTs computer science Certification Intelligent sensors

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Semi-fragile watermarking algorithm based on image character

Semi-fragile watermarking algorithm based on image character

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International Conference on computer science and Software engineering, CSSE 2008

作者： Che, Shengbing Che, Zuguo Ma, Bin Huang, Qiangbo College of computer science Central South University of Forestry and Technology Hunan Changsha 410004 China

ISBN: (纸本)9780769533360

Embedding watermark based on the attacks' characteristic was brought up, and it brought forward the region division algorithm and the double steps embedding method, put forward the characteristic and its representation in DWT transform domain based on visual features model, and brought forward the quantized central limit theorem which was applied to adjusting the coefficients in general transform domain. These all made semi-fragile watermarking embedded through dynamic quantization achieve the greatest robustness. It gave DWT coefficient redressal algorithm and the best restore probability of the pixel value adjusting in experiments when the images were under attack. It led to a better invisibility of carrier image, a better robustness in the image processing, such as JPEG compression, noise adding, filtering, and a larger amount of embedded information. What's more, it could ascertain the position of vicious attack exactly. © 2008 IEEE.

关键词： Restoration

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Research on MultiMedia Ontology bridging "semantic gap" between perceivable world and conceptual world

Research on MultiMedia Ontology bridging "semantic gap" betw...

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2008 the 1st IEEE International Conference on Ubi-Media Computing and Workshops, U-Media2008

作者： Man, Jun-Feng Yang, Lu-Ming Wu, Zhi-Hui Xu, Guo-Wen College of Information Science and Technology Central South University Changsha 410083 China College of Computer and Communication Hunan University of Technology Zhuzhou 412008 China College of Application Science Jiangxi University of Science and Technology Ganzhou 341000 China

ISBN: (纸本)9781424418657

The producers and customers have difficulties in organizing, finding, retrieving and accessing 'right' media info, reasons for this problem stem from a lack of interoperability and semantic metadata share between several applications for multimedia processing and understanding. Thus, it is necessary to design a set of media info understanding-oriented MultiMedia Ontology (MMO). In order to effectively solve the problem of "semantic gap" between perceivable media world and high-level conceptual world, a novel method of semantic-layering and semantic-abstracting step by step is adopted, viz. the abstract from primary perceptive level to high-level perceptive level by various perceptual components and the abstract from high-level perceptive level to high-level conceptual level by mathematical model such as Hierarchical Hidden Markov Model (HHMM). MMO is designed by re-engineering MPEG-7 with OWL DL rules, which includes core ontology, media ontology and domain ontology, the reason for such design is to be convenient to adopt existing ontology(such as MPEG-7 and DOLCE) and easy to be extended and reused. A use case of semantic-abstracting and semantic-annotating is showed to testify the effect of MMO. © 2008 IEEE.

关键词： Ontology

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Study of Sepic AC-DC-AC matrix converter based on AC chopper principle

Study of Sepic AC-DC-AC matrix converter based on AC chopper...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Jianlin Zhu Lidan Xiang Shasha Liu Xiaoping Zhang College of Information Engineering University of Xiangtan Xiangtan Hunan China College of Information and Electrical Engineering Hunan University of Science and Technology Xiangtan Hunan China

A new AC-DC-AC matrix converter topology based on Sepic is proposed. The basic configuration of the new topology and its fundamental principle are firstly introduced, the analytic expression on the function of voltage transfer ratio and duty cycle is analyzed, and the rationale of double-loop control strategy is clarified. Finally the validity and feasibility of the new topology are tested by means of computer simulation and prototype experiment. The results indicate that the regulation of the voltage transfer ratio and output frequency can be realized by the new converter, furthermore the system can be started well and the harmonic distortion of waveform is lower. So the inherent drawback of low voltage transfer ratio of traditional matrix converter is effectively settled. This study may provide inspiration for further engineering application.

关键词： Voltage control Matrix converters Converters Topology Inductors Capacitors Inverters

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Investigation of an ideal intense relativistic sheet electron beam propagating in a periodic magnetic focusing system

Investigation of an ideal intense relativistic sheet electro...

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17th International Conference on High Power Particle Beams, BEAMS'08

作者： Du, Guangxing College of Optoelectric Science and Engineering National University of Defense Technology Changsha Hunan 410073 China

The stability of an ideal intense relativistic sheet electron beam (IRSEB) propagating in planar periodic magnetic field structures has been investigated, and the conditions of the stability have been derived. The distribution of the periodic magnetic field designed by a 3D magnetic field simulation software has been employed in a 3D PIC code to simulate the propagation of the IRSEB in a rectangular waveguide. The 3D PIC simulation results show that, the propagation of the IRSEB focused with periodic magnetic fields is achievable for 300keV and 3kA with a cross section of 0.2mm by 120mm and magnetic fields amplitude of about 0.1Tesla. © 2008 Institute of Fluid Physics, C.

关键词： computer software

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Research on Web Services Maiden Business Trust Metrics, Appraisal and Filtration Model

Research on Web Services Maiden Business Trust Metrics, Appr...

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The 9th International Conference for Young computer Scientists(第九届国际青年计算机大会)

作者： Lei Jiang Jianxun Liu Knowledge Grid Laboratory Hunan University of Science and Technology Xiangtan 411201 China Institute of Computer Science and Engineering Hunan University of Science and Technology Xiangtan 411201 China

Internet gives small and medium-sized enterprises and individuals an easy way to set up web sites to provide Web services throughout the world. But good Web services vendors are always intermingled with bad ones. When we seek an unknown Web service provider in an unfamiliar field, we must quantify trust before transaction and select the best vendor to assure that everything works as we expected. In this paper, we suggest an evaluation model of trust. We extract five maiden trust metrics from the vendors' web sites and use a determinant matrix to appraise the trust. Finally, we show how to filter the best vendor by using fuzzy logic.

关键词： Determinant matrix fuzzy logic maiden trust metrics trust model.

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Hybrid genetic neural network method for predicting chaotic time series

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Xitong Fangzhen Xuebao / Journal of System Simulation 2008年第21期20卷 5825-5828页

作者： Li, Mu He, Yi-Gang Zhou, Shao-Wu Tan, Wen School of Information and Electrical Engineering Hunan University of Science and Technology Xiangtan 411201 China College of Electrical and Information Engineering Hunan University Changsha 410082 China

By incorporating modified genetic algorithm with the neural network, a novel hybrid genetic neural network method for predicting chaotic time series based on the theory of phase-space reconstruction was presented. The chaotic time series was reconstructed by using multiple correlation and Cao's methods, and the modified genetic algorithm was used to optimize the structure, the initial weights and thresholds of neural network, then neural network was trained to search for the optimal solution. The availability of this algorithm was proved by predicting chaotic time series, and the precision of this algorithm compared with those of BP and RBF algorithms. The computer simulations have shown that the nonlinear fitting and precision of this algorithm are better than those of BP and RBF algorithms.

关键词：混沌时间序列相空间重构遗传算法神经网络非线性预测

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