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Resolving conflicts between negotiation success and sensitive information protection in automated trust negotiation

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Frontiers of Computer Science 2011年第2期5卷 135-147页

作者： Bailing LIU Feng XIAO Ke DENG Department of Information and Management Huazhong Normal University Wuhan 430079 China Huawei technologies Co. Ltd Wuhan 430000 China The No.92373 of PLA Dalian 116001 China

Automated trust negotiation （ATN） is an approach to establishing mutual trust between strangers wishing to share resources or conduct business by gradually requesting and disclosing digitally signed credentials. In ATN, there are conflicts between negotiation success and sensitive information protection, that is, these two needs cannot be given priority at the same time, which is a challenging problem to resolve. In this paper, a language independent ATN framework, which is dynamic, flexible and adaptive, is presented to address this problem, ensuring negotiation success without sensitive information leakage. This framework is independent of the policy language which is used. However, the language used should have the capability to specify all kinds of sensitive information appearing in credentials and policies, and support the separation of attribute disclosure from credential disclosure. Thus definitions of new language features, which can be incorporated into existing policy languages, are given, enabling the used language to support the capabilities mentioned above.

关键词： automated trust negotiation (ATN) negotiation success sensitive information protection framework policy language

Solidification Behavior and Microstructures Characteristics of Ti-48Al-3Nb-1.5Ta Powder Produced by Supreme-Speed Plasma Rotating Electrode Process

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Acta Metallurgica Sinica(English Letters) 2023年第8期36卷 1221-1234页

作者： Zhenbo Zuo Rui Hu Xian Luo Qingxiang Wang Chenxi Li Zhen Zhu Jian Lan Shujin Liang Hongkui Tang Kang Zhang State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an710072China Sino-Euro Materials technologies of Xi’an Co. Ltd.Xi’an710018China

In this study,the characteristics and solidification behavior of Ti-48Al-3Nb-1.5Ta powder produced by supreme-speed plasma rotating electrode process(SS-PREP®)were *** microstructure,phase and characteristics were analyzed by scanning electron microscopy,X-ray diffraction and other *** atomization mechanism is direct drop *** relationship between the particle size and cooling rate is vc=3.14×10^(-7)·d^(-2)+1.18×10^(-2)·d^(3/2),and the relationship between secondary dendrite arm space and the particle size isλ=0.028d+0.11,as well as the relationship between SDAS and cooling rate isλ=4.84×10^(-5)·T^(-1.43).With increase in particle size,the surface structure gradually changes from the featureless smooth structure to dendritic and cellular dendritic morphology,and the flow ability becomes *** carbides mainly exist within 5 nm of the surface and the oxidation layer is about 20 nm ***-48Al-3Nb-1.5Ta powder was mainly composed ofα2 phase andγ*** increase in particle size,the content ofγphase increases,and the hardness decreases *** 106–250μm particles are composed of multiple grains with the grain size of 70–80μ*** microstructure,phase composition and hardness of different TiAl powders with the same size are similar,but the elastic modulus is different.

关键词： Supreme-speed plasma rotating electrode process(SS-PREP) TiAl alloy Atomization Powder Microstructure

Reseach Progress of Photonic Crystal Fibers in China

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China Communications 2008年第1期5卷 28-38页

作者： Li Jinyan, Chen Wei Optical Fiber R&D Department of Fiberhome Telecommunication technologies Co. ltd,Wuhan, Hubei, China, 430074 Optical Fiber R and D Department of Fiberhome Telecommunication technologies Co. ltd Wuhan Hubei 430074 China

Photonic Crystal Fibers have attracted worldwideinterest within the last decade due to their uniqueoptical properties and because they exhibit a muchhigher degree of design freedom compared to conventionaloptical *** this article, the fabricationtechnologies of photonic crystal fibers and theirapplications at home and abroad were formulated atlength, especially in the following fields, such aslarge mode area active photonic crystal fibers andfiber lasers, birefringence fibers and sensors, highnonlinear photonic crystal fibers and frequencytransformation, dispersion compensation PCFs anddispersion compensation for telecommunicationsystems, and photonic band-gap fibers. Finally, accordingto the above analysis, the prospects anddeveloping trends of photonic crystal fibers in thefuture were presented.

关键词： photonic crystal fiber microstructure optical fiber fabrication application fiber laser rare earth device

Estimation of the Maximum Output Power of Double-Clad Photonic Crystal Fiber Laser

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Chinese Physics Letters 2012年第7期29卷 146-148页

作者： CHEN Yue-E WANG Yong QU Xi-Long College of Science Yanshan UniversityQinhuangdao 066004 CanaLaser technologies Co. Ltd.Ningbo 315336 School of Computer and Communication Hunan Institute of EngineeringXiangtan 411104

Compared with traditional optical fiber lasers,double-clad photonic crystal fiber (PCF) lasers have larger surfacearea-to-volume *** an increase of output power,thermal effects may severely restrict output power and deteriorate beam quality of fiber *** utilize the heat-conduction equations to estimate the maximum output power of a double-clad PCF laser under natural-convection,air-cooling,and water-cooling conditions in terms of a certain surface-volume heat ratio of the *** thermal effects hence define an upper power limit of double-clad PCF lasers when scaling output power.

关键词： fiber Crystal double

Nano-silica particles enhanced adsorption and recognition of lysozyme on imprinted polymers gels

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Journal of Beijing Institute of Technology 2015年第4期24卷 579-586页

作者：赵文涛薛彬陈振贺杨戍张鑫孙立权罗爱芹 School of Life Science Beijing Institute of Technology Agilent technologies(China)Co. Ltd Municipal Research Institute of Environmental Protection Beijing

Molecular imprinting technology has a great potential to be used in protein separation and purification. In this work, lysozyme imprinted polyacrylamide gel was prepared with silica particles as a sacrificial template to generate macro-porosity for fast adsorption. The adsorption equilibrium time and adsorption capacity were 9 h and 56 mg/g respectively, which was 2 h less and 2.3-fold more than polymers without the sacrificial template. In order to test molecular imprinting polymers （MIPs）＇ selectivity, bovine serum albumin （BSA） was chosen as interferent for binary adsorption tests. In addition, the adsorption selectivity was further investigated using different molar ratios of lysozyme to BSA with fixed total concentration of proteins, as well as using various total concentra- tions of proteins with an equimolar ratio of lysozyme to BSA. It has been proven that the total con- centration of proteins should be larger than 1.5 × 10^-7 mol/mL, when the molar ratio of BSA to Lyz is 1： 1, in order to effectively separate Lyz from the binary protein mixture. The macro-porous lyso- zyme molecularly imprinted polymers have less adsorption time, larger adsorption capacity, and bet- ter imprinting effect.

关键词： lysozyme silica molecular imprinting macro-porous polymers adsorption kinetics

A time-aware query-focused summarization of an evolving microblogging stream via sentence extraction

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Digital Communications and Networks 2020年第3期6卷 389-397页

作者： Fei Geng Qilie Liu Ping Zhang Huazhong University of Science and Technology WuhanChina Chongqing University of Posts and Telecommunications ChongqingChina Huawei technologies Co. LtdChina

With the number of social media users ramping up,microblogs are generated and shared at record *** high momentum and large volumes of short texts bring redundancies and noises,in which the users and analysts often find it problematic to elicit useful information of *** this paper,we study a query-focused summarization as a solution to address this issue and propose a novel summarization framework to generate personalized online summaries and historical summaries of arbitrary time *** framework can deal with dynamic,perpetual,and large-scale microblogging ***,we propose an online microblogging stream clustering algorithm to cluster microblogs and maintain distilled statistics called Microblog Cluster Vectors(MCV).Then we develop a ranking method to extract the most representative sentences relative to the query from the MCVs and generate a query-focused summary of arbitrary time *** experiments on large-scale real microblogs demonstrate the efficiency and effectiveness of our approach.

关键词： Microblog Query-focused summarization Computational linguistics Sentence extraction Personalized pagerank

Dispersion-flattened Bragg photonic crystal fiber for large capacity optical communication system

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Frontiers of Optoelectronics 2009年第3期2卷 289-292页

作者： Wei CHEN Shiyu LI Peixiang LU Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology State Key Laboratory of Optical Communication technologies and Networks Fiberhome Telecommunication Technologies Co.Ltd.

A novelty dispersion ultra-flattened Bragg photonic crystal fiber(PCF) has been fabricated in this paper. The fiber is composed of compound cores and periodical claddings with 11 coaxial rings. It has flattened dispersion of 8.5±1.3 ps·(nm·km)–1in the communication wavelength range of 1460–1625 nm. Its dispersion slope alters from – 0.0428 to 0.0392 ps·nm–2·km–1. The low attenuation of 0.52 d B/km and low bending loss of 0.09 d B at 1550 nm of the fiber are also achieved. The Bragg PCF has enormously potential application in the fields of dense wavelength division multiplexing systems because of its superior dispersion properties and easy splicing performances.

关键词： photonic crystal fiber (PCF) fabrication low dispersion communication optoelectronic devices

Genesis study of high abundant 17α(H)-diahopanes in Lower Cretaceous lacustrine source rocks of the Lishu Fault Depression, Songliao Basin, Northeast China

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Chinese Journal Of Geochemistry 2014年第2期33卷 201-206页

作者： LIU Haiyu ZHANG Min LI Xing School of Earth Environment and Water Resources Yangtze University Key Laboratory of Exploration technologies for Oil and Gas Resources Yangtze University Zhanjiang Branch of CNOOC ltd.

Relatively abundant 17α(H)-diahopanes have been detected in the lower cretaceous lacustrine source rocks from the Lishu Fault Depression in the Songliao Basin Northeast China. Rich long chain tricyclic terpanes(carbon number up to C35) and gammacerane have been observed in those source rocks with relatively abundant 17α(H)-diahopanes, which is rarely seen in previous reports. In this paper, the formation of 17α(H)-diahopanes has been discussed from three aspects including maturity, oxidation-reduction nature of depositional environment and parent material composition by the GC/MS analyses. The results reveal that maturity and oxidation-reduction nature of depositional environment have little effect on the formation of 17α(H)-diahopanes in the investigated area. However, the positive correlation between long-chain tricyclic terpanes and 17α(H)-diahopanes argues strongly for a common origin, and the origin is related to the algaes in saline water environment. The algaes in saline water environment may be a kind of origin of 17α(H)-diahopanes.

关键词：中国东北地区湖相烃源岩重排藿烷梨树断陷松辽盆地下白垩统 A(H) 成因

Optimized production of transgenic buffalo embryos and offspring by cytoplasmic zygote injection

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Journal of Animal Science and Biotechnology 2015年第4期6卷 395-401页

作者： Fanli Meng Hui Li Xiaoli Wang Guangsheng Qin Bj?rn Oback Deshun Shi Animal Reproduction Institute State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresourcesGuangxi University AgResearch ltd. Ruakura Research CentreReproductive Technologies

Background： Cytoplasmic injection of exogenous DNA into zygotes is a promising technique to generate transgenic livestock. However, it is still relatively inefficient and has not yet been demonstrated to work in buffalo. We sought to improve two key technical parameters of the procedure, namely i） how much linear DNA to inject and ii） when to inject it. For this, we introduced a constitutively expressed enhanced green fluorescent protein （EGFP） plasmid into buffalo zygotes. Results： First, we found that the proportion of EGFP-expressing blastocysts derived from zygotes injected with 20 or 50 ng/pL DNA was significantly higher than from those injected with 5 pg/mL. However, 50 ng/pL exogenous DNA compromised blastocyst development compared to non-injected IVF controls. Therefore the highest net yield of EGFP-positive blastocysts was achieved at 20 ng/pL DNA. Second, zygotes injected early （7-8 h post-insemination [hpi]） developed better than those injected at mid （12-13 hpi） or late （18-19 hpi） time points. Blastocysts derived from early injections were also more frequently EGFP-positive. As a consequence, the net yield of EGFP-expressing blastocysts was more than doubled using early vs late injections （16.4 % vs 7.7 %）. With respect to blastocyst quality, we found no significant difference in cell numbers of EGFP-positive blastocysts vs non-injected blastocysts. Following embryo transfer of six EGFP-positive blastocysts into four recipient animals, two viable buffalo calves were born. Biopsied ear tissues from both buffalo calves were analyzed for transgene presence and expression by Southern blot, PCR and confocal laser scanning microscopy, respectively. This confirmed that both calves were transgenic. Conclusions： Our cytoplasmic injection protocol improved generation of transgenic embryos and resulted in the first transgenic buffalo calves produced by this method.

关键词： Buffalo Cytoplasmic injection Plasmid Transgenic Zygote