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Golden age:on multi-source software update propagation in pervasive networking environments

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Science China(Information Sciences) 2013年第8期56卷 104-118页

作者： li wenzhong FU XiaoMing CHAN Edward LU SangLu CHEN DaoXu State Key Laboratory for Novel Software Technology Nanjing University Institute of Computer Science University of Goettingen Department of Computer Science City University of Hong Kong

With the development of Internet technology,a large portion of computer softwares appear to run in a network-oriented,distributed-deployed,and self-evolving *** emerging wireless communication technologies broaden the usage of software in mobile platforms,enabling the pervasive computing paradigm,where people can access information/service anytime and anywhere with portable *** the pervasive networking environment where mobile devices operate on the ad hoc mode and communicate with each other opportunistically without wireless infrastructures,distributing the evolving software updates to a set of mobile terminals is a challenging *** this paper,we address the problem of distributing multiple software updates in pervasive networks with storage and bandwidth constraints,and propose age-based solutions to tackle this *** basic idea is to introduce different age-based priority mechanisms for propagation decision making in order to resolve the contention of wireless bandwidth and storage *** investigate a number of update propagation strategies including random spread,youngest age,and golden *** models are derived to analyse the performance of the proposed *** is shown that the golden age strategy has the burst effect,which could be used to enhance the efficiency of software update *** principles for choosing golden age values are proposed aiming to optimize different utility *** simulations under various network parameters show that the golden age strategy outperforms other strategies for multi-source software updates propagation.

关键词： pervasive computing software update propagation mobile ad hoc networks

Fundamental Study on New Method of Reducing Iron Ore-Coal Pellet in Cocurrent Shaft Furnace

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Journal of Iron and Steel Research International 1999年第1期6卷 19-22页

作者： Wang Qi Yang Zhaoxiang Tian Jimin li wenzhong Sun Jiafu Anshan University of Iron and Steel Northeastern University

Based on the laboratory experiment of reducing iron ore-coal pellet in oxidizing atmosphere,a new self-heating reduction method of iron ore-coal pellet in the cocurrent shaft furnace(CSF) has been *** this process,the pellets and preheated oxygen-enriched air enter the shaft furnace through its top and descend cocurrently in the *** of the heat required for rising temperature and endothermic reduction of descending pellets is provided by the way that the descending air burns the volatile from pellets and CO from the reduction of iron oxide in *** reduced pellets and high temperature gas are discharged from the lower *** sensible heat and chemical energy of the off-gas are used to heat the oxygen-enriched air in *** process is applicable to the direct reduction of iron pellets and prereduction of iron pellets in smelting reduction with iron bath.

关键词： iron ore-coal pellet cocurrent shaft furnace reduction

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李文中谈基于语料库的文化表述研究

语料库语言学 2015年第1期2卷 1-11,114页

作者：李文中北京外国语大学

继2014年第2期卫乃兴、许家金笔谈'语料库语言学的本体与方法'之后,本期'同题共议'栏目约请李文中、钱毓芳两位学者,就跨文化概念表述,特别是在中国文化概念的英文表述实践和研究中,如何运用语料库数据、方法和理念等6个议题展开讨论。... 详细信息

继2014年第2期卫乃兴、许家金笔谈'语料库语言学的本体与方法'之后,本期'同题共议'栏目约请李文中、钱毓芳两位学者,就跨文化概念表述,特别是在中国文化概念的英文表述实践和研究中,如何运用语料库数据、方法和理念等6个议题展开讨论。本刊不作评点,亦不选择立场,其中观点全凭读者考量。本刊欢迎同仁就同样的议题来稿研讨。

关键词：笔谈议题跨文化方法概念语料库观点

Study on nitrile-degrading microorganisms

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Journal of Environmental Sciences 1991年第3期3卷 91-97页

作者： li wenzhong, Zhang Hongyi and Yang HuifangInstitute of Microbiology,Academia Sinica,Beijing 100080,China

Two strains of bacteria were isolated from nitrile polluted soils, and identified as Corynebacterium boffmanii and Arthrobacter flavescens. Acetonitrile, propionitrile, butyronitrile and acrylonitrile were degraded by these bacteria to yield corresponding amides, carboxylic acids and ammonia. The nitrile-degrading abilities of these strains were investigated. The removal rates for the nitrile were nearly 100%, after these bacteria were grown in medium containing 10000 ppm of aceto-, propio-, or butyronitrile at 28 ℃ for 24h. When the reaction mkture consisting of 5000 ppm of above mentioned nitriles or acrylonitrile and 20g (dry cell) /L resting cells of the two strains in 0.06mol/L phosphate buffer (pH7.5) was incubated separately at 25 ℃ with moderate shaking for 15 or 45 min, the nitrile could be degraded completely. The optimum growth conditions for *** and *** were studied as well.

关键词： nitrile microbial degradation microorganisms.

Modification of polycarbonateurethane surface with poly （ethylene glycol） monoacrylate and phosphorylcholine glyceraldehyde for anti-platelet adhesion

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Frontiers of Chemical Science and Engineering 2014年第2期8卷 188-196页

作者： Jing YANG Juan LV Bin GAO li ZHANG Dazhi YANG Changcan SHI Jintang GUO wenzhong li Yakai FENG School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China Tianjin University-Helmholtz-Zentrum Geesthacht Joint Laboratory for Biomaterials and Regenerative Medicine Tianjin 300072 China Key Laboratory of Systems Bioengineering Ministry of Education Tianjin University Tianjin 300072 China University of Rostock Department of Cardiac Surgery Reference & Translation Center for Cardiac Stem Cell Therapy Schillingallee 69 D-18057 Rostock Germany

Poly（ethylene glycol） monoacrylate （PEGMA） is grafted onto polycarbonateurethane （PCU） surface via ultraviolet initiated photopolymerization. The hydroxyl groups of poly（PEGMA） on the surface react with one NCO group of isophorone diisocyanate （IPD1） and another NCO group of IPDI is then hydrolyzed to form amino terminal group, which is further grafted with phosphorylcholine glyceraldehyde to establish a biocompatible hydrophilic structure on the surface. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirm the successful grafting of both PEG and phosphorylcholine functional groups on the surface. The decrease of the water contact angle for the modified film is caused by synergic effect of PEG and phosphorylcholine, which both have the high hydrophilicity. Furthermore, the number of platelets adhered is relative low on the synergetically modified PCU film compared with the PCU film modified only by poly（PEGMA）. Our synergic modification method using both PEG and phosphorylcho- line may be applied in surface modification of bloodcontacting biomaterials and some relevant devices.

关键词： poly(ethylene glycol) monoacrylate phos-phorylcholine polycarbonateurethane surface modifica-tion anti-platelet adhesion biomaterials

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Geo-rough Space

Geo-Spatial Information Science 2003年第1期6卷 54-61页

作者： WANG Shuliang li Deren SHI wenzhong WANG Xinzhou National Laboratory for Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan China

Rough set is a new approach to uncertainties in spatial *** this paper,rough set symbols are simplified and standardized in terms of rough interpretation and specialized *** spatial entities and their topological relationships are also proposed in rough space,thus a universal intersected equation is developed,and rough membership function is further extended with the gray scale in our case *** complete three ***,a set of simplified rough symbols is advanced on the basis of existing rough ***,rough spatial entity is put forward to study the real world as it is,without forcing uncertainties into crisp ***,rough spatial topological relationships are studied by using rough matrix and their *** relationships are divided into three types,crisp entity and crisp entity (CC),rough entity and crisp entity (RC),and rough entity and rough entity (RR).A universal intersected equation is further ***,the maximum and minimum maps of river thematic classification are generated via rough membership function and rough relationships in our case study.

关键词： rough set rough spatial entity rough topological relationship rough symbols

Lecture Series on Chinese Archeological Discoveries Fascinates French Audiences

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China & The World Cultural Exchange 2007年第5期73卷 6-7页

作者： li wenzhong

Lecture series on Chinese archeological discoveries took place in China Culture Center in Paris late November, 2006, as part of the center’s lecture program aiming to respond to French people’s growing interest in Chinese culture. Diverse subjects such as archeological discoveries, heritage conservation, Chinese history and civilization as well as traditional ways to enhance bodycare, all attracted the French audience to come. So far, this lecture program has made itself a brand name of the culture center as a primary means to spread Chinese culture and information and provide French people with training on the Chinese language.

关键词：中国考古学发现文化交流法国

Properties of mercuric reductase from a HgCl_2-resistant fungus

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Journal of Environmental Sciences 1995年第1期7卷 85-91页

作者： Wang Baojun li wenzhong Yang Huifang Institute of Microbiology,Chinese Academy of Sciences, Beijing 100080,china

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ＰｒｏｐｅｒｔｉｅｓｏｆｍｅｒｃｕｒｉｃｒｅｄｕｃｔａｓｅｆｒｏｍａＨｇＣｌ＿２－ｒｅｓｉｓｔａｎｔｆｕｎｇｕｓＷａｎｇＢａｏｊｕｎ；ＬｉＷｅｎｚｈｏｎｇ；ＹａｎｇＨｕｉｆａｎｇＩｎｓｔｉｔｕｔｅｏｆＭｉｃｒｏｂｉｏｌｏｇｙ，ＣｈｉｎｅｓｅＡｃａｄｅ...

关键词： Cephalosporium tabacinum F2 mercuric reductase resistant fungus.

Effect of Electromagnetic Stirring on the Quality of K417 Superalloy Ingots

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航空制造技术 2007年第Z1期50卷 389-392页

作者： Jin wenzhong li Tingju Yin Guomao

The effect of electromagnetic stirring on the inner quality of K417 superalloy ingots is studied with EPMA and optical *** results show that while an electromagnetic stirring with 50Hz frequency and 80A current is imposed,the equiax crystals of K417 superalloy ingots can be effectively refined and increased,and the central shrinkage porosity and the dendritic segregation of K417 superalloy ingots are greatly reduced,so the inner quality of K417 superalloy ingots is obviously improved.

关键词： Electromagnetic stirring Superalloy Ingots Quality