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厦门大学学报（自然科学版） 2002年第S1期41卷 274-页

作者： REN Chang-rui, CHAI Yue-ting, LIU Yi (national engineering research center for Computer Integrated Manufactu ring Systems, Department of Automation, Tsinghua university, Beijing 100084, china)

An agile supply chain can be defined as a dynamic s up ply network of some autonomous or semi-autonomous business entities, which can well adapt to the competitive, cooperative and dynamic market environment Agile supply chain needs quick response ability to the unpredictable and ever-changin g market environment, and the entities in agile supply chain have complex relati onships of competition, cooperation and dynamics, which make agile supply chain management a very complex process that includes a lot of no-linear, dynamic and uncertain factors. There is a common opinion that applying multi-agent collaborative work environm ent is an appropriate method to solve agile supply chain management problem. We have presented a model based on coordination of Multi-Agent System (MAS) two ye ars ago, and it has already been proved to be a rather better model by practical project. In the model, we apply MAS structure, and agents negotiate each other to achieve coordination, so the communication among agents becomes very impo rtant. Task allocation is a very common problem in agile supply chain management, and t here are many complex task re-allocation problems at the transaction level. In such situations, agents need to negotiate with others to produce effective alloc ation results. But traditional negotiation mechanisms often cease to work as a r esult of communication or computational complexities. Auctions provide an effici ent way of resolving one-to-many negotiations, so in this paper, we choose Eng lish auction to design a sufficient negotiation mechanism, and use combinatorial auction to solve the complex task re-allocation problems. We first analyze the features of task allocation problems in agile supply chain and build a problem model, and then design a comprehensive task allocation mechanism based on auctio n theories. Finally, by examining our results for what it is, essentially, an ap plication of game-theory and mechanism design to existing application, we draw

关键词： agile supply chain task allocation auction

Identifying heavy hitters in high-speed network monitoring

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Science china(Information Sciences) 2010年第3期53卷 659-676页

作者： ZHANG Yu1, FANG BinXing1,2 & ZHANG YongZheng2 1research center of Computer Network and Information Security Technology, Harbin Institute of Technology, Harbin 150001, china 2research center of Information Security, Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, china 1. research center of Computer Network and Information Security Technology Harbin Institute of Technology Harbin 150001 China2. Research Center of Information Security Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

Identifying heavy hitters in a network traffic stream is important for a variety of network applications ranging from traffic engineering to anomaly detection such as detection of denial-of-service attacks. Existing methods generally examine newly arriving items in the stream, perform a small number of operations using a small amount of memory, and still provide guarantees on the identifying accuracy. In high-speed network monitoring, the update speed per item is extremely critical. However, so far as we know, there are no identifying algorithms which can provide constant update time (O(1)) in a weighted data stream. In this paper, we present an algorithm named Weighted Lossy Counting (WLC) which is able to identify heavy hitters in a high-speed weighted data stream with constant update time. WLC employs a novel efficient partially ordered data structure which is able to provide a fast per-item update speed while keeping the memory cost relatively low. We compare WLC with state-of-the-art algorithms for finding heavy hitters in real traffic traces. The experimental results show that WLC performs well in accuracy (recall, precision and average relative error) as other algorithms; moreover it has a much higher update speed at the cost of relatively larger memory space used. A theoretical worst-case memory bound of WLC is also derived in this paper; however, experiments with long real traffic traces show that WLC requires much less space than the theoretical bound in practice.

关键词： network traffic monitoring heavy hitter weighted data streams

煤层气直井开发概要——以鄂尔多斯盆地韩城地区煤层气开发为例

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天然气工业 2011年第12期31卷 66-71,128页

作者：李景明巢海燕聂志宏中石油煤层气有限责任公司中联煤层气国家工程中心有限责任公司

煤层气钻井方式中,直井技术(包括丛式井)最为成熟,费用较低,操作简单,没有太大的使用限制,无论在前期开发评价,还是后期的增产改造和规模开发中,其作用都不可替代,是国内煤层气开发普遍采用的方式。为此,论述了其开发要点:①煤层气的选... 详细信息

煤层气钻井方式中,直井技术(包括丛式井)最为成熟,费用较低,操作简单,没有太大的使用限制,无论在前期开发评价,还是后期的增产改造和规模开发中,其作用都不可替代,是国内煤层气开发普遍采用的方式。为此,论述了其开发要点:①煤层气的选区、选井及选层主要依靠地震勘探技术结合基础地质技术完成;②单井评价通常以测井评价为主,录井技术和试井技术为辅,而测井记录的数据常需使用经过选择的煤心和试井数据标定,这样才能提高储层评价参数及单井评价的可靠性,进而确定射孔压裂层段;③直井的增产改造方法除水力压裂外,还可考虑裸眼完井和筛管完井技术,裸眼完井需考虑煤层适应性,而筛管完井除了应用于水平井外,也可以用于裸眼完井的直井中;④煤层气排采需紧密结合排采装备,初期以最小的强度稳定缓慢排采,然后根据地层实际供液能力调整工作制度,尽量使地层供液与排液量保持一致,稳定持续缓慢降液,尽可能地扩大压降范围。

关键词：煤层气直井开发布井地质录井裸眼完井筛管完井增产改造排水采气

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敏捷供需链中业务过程管理系统的模型分析

计算机工程与应用 2002年第8期38卷 214-216页

作者：来国明柴跃廷刘义清华大学国家CIMS工程中心北京100084

敏捷供需链是为适应市场激烈竞争而组成的上下游企业间的动态联盟。业务过程的有效管理对于敏捷供需链的优势发挥及其重要。工作流技术是业务过程优化管理的有效方法,但敏捷供需链动态性、分布式的环境对工作流技术的实现机制提出了柔... 详细信息

敏捷供需链是为适应市场激烈竞争而组成的上下游企业间的动态联盟。业务过程的有效管理对于敏捷供需链的优势发挥及其重要。工作流技术是业务过程优化管理的有效方法,但敏捷供需链动态性、分布式的环境对工作流技术的实现机制提出了柔性要求。文章从工作流技术的思想出发,提出了敏捷供需链中业务过程的优化管理体系结构和执行机制,该方案可以有效地适应敏捷供需链的运作。

关键词：敏捷供需链事件驱动业务过程管理系统企业管理模型分析

research on rotational speed to the influence of pump as turbine

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Research on rotational speed to the influence of pump as tur...

Functions and mechanisms of the CBL-CIPK signaling system in plant response to abiotic stress

The 26th IAHR Symposium on Hydraulic Machinery and Systems

作者： S S Yang F Y Kong W M Jiang and X Y Qu research center of Fluid Machinery engineering and Technology Jiangsu university Zhenjiang Jiangsu 212013 china

Due to the problem of lacking hydraulic control devices,pump as turbine （PAT） has the disadvantage of optimum operation only within a small range discharge where the net head utilization and operating efficiency are the *** speed operation offers a good solution to this *** manufactures normally do not provide performance curves of their pumps working as turbines,especially when working at variable speed ***,establishing a correlation between PAT’s performance curve and rotational speed is *** this paper,a method of predicting PAT’s performance at different rotational speeds was first developed using theoretical *** the second step,a single stage centrifugal pump operated as a turbine was tested at different rotational *** performance curves of PAT operating at variable speed condition were *** computational fluid dynamics （CFD） had been used in this *** accuracy of CFD prediction was proved when compared with experimental *** validity of presented method by theoretical analysis was validated using test and CFD results.

关键词：

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Progress in Natural Science:Materials International 2009年第6期19卷 667-676页

作者： Ruifen Li a,1, Junwen Zhang a,b,1, Jianhua Wei a, Hongzhi Wanga, Yanzhen Wanga, Rongcai Ma a, a Beijing Agro-Biotechnology research center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, china b Life Science College, Capital Normal university, Beijing 100037, china [a]Beijing Agro-Biotechnology research center Beijing Academy of Agriculture and Forestry Sciences Beijing 100097 China [b]Life Science College Capital Normal University Beijing 100037 China

To cope with environmental stimuli, plants have evolved precise regulatory mechanisms to perceive, transduce and respond to abiotic stresses that can negatively affect growth and development. The CBL-CIPK signaling system is a newly emerging plant-specific and Ca2+-dependent network mediating abiotic stress tolerance. CBLs may sense a Ca2+ signature triggered by abiotic stresses, and have specific interactions with novel CIPK-type kinases after binding Ca2+. The CBL/CIPK complexes may post-translationally phosphory-late downstream target proteins to regulate abiotic stress tolerance in a cell or tissue-specific manner. In some cases transcription factors are induced to activate stress-responsive genes that control adaptation reactions. The CBL-CIPK signaling system exhibits specificity, diversity and complexity. Meanwhile, cross talk also exists in the CBL-CIPK signaling. To date, significant progress has been made in the role of the CBL-CIPK signaling system in responding to salt, low K+ and to high pH, which will provide a fast and efficient method of molecular design breeding combined with the CBL/CIPK engineering of crop plants, for enhanced tolerance to abiotic stresses. However, more CBL/CIPK components remain to be identified, particularly from specific plants that grow in conditions with abiotic stress, and the specificity of their abiotic stress signaling will need to be dissected.

关键词： Calcium signal CBL CIPK Signal transduction Abiotic stress

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分段式全带宽动态分配算法研究

计算机工程与应用 2004年第32期40卷 148-151,161页

作者：韩国栋邬江兴信息工程大学国家数字交换系统工程技术研究中心郑州450002

为提高多业务分组系统的带宽利用效率,提出了一种分段式全带宽动态分配算法,该算法允许单业务流最大可用带宽超出其公平共享范围。分析和实践结果表明,在保持常规算法的带宽利用率、公平性和满足用户QoS指标的同时,该算法使有需求链路... 详细信息

为提高多业务分组系统的带宽利用效率,提出了一种分段式全带宽动态分配算法,该算法允许单业务流最大可用带宽超出其公平共享范围。分析和实践结果表明,在保持常规算法的带宽利用率、公平性和满足用户QoS指标的同时,该算法使有需求链路在系统处于非饱和状态时可占用全部剩余带宽(直至全带宽),显著提高系统的总带宽利用率。

关键词：全利用度动态带宽分配公平性带宽利用率

water Consumption and Use Efficiency of Main Crops on Semi-drought Area of Western Liaoning Province

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Journal of Northeast Agricultural university(English Edition) 2010年第2期17卷 36-42页

作者： SUN Zhanxiang 1,3,FENG Liangshan 1,3,ZHENG Jiaming 1,3,LIU Yang 1,3,ZHANG Ying 2,3,and YANG Ning 1,3 1 Liaoning Academy of Agricultural Sciences,Shenyang 110161,china 2 College of Land and Environment,Shenyang Agricultural university,Shenyang 110161,china 3 engineering research center for Dry and water-efficient Farming of Liaoning Province,Shenyang 110161,china Liaoning Academy of Agricultural Sciences Shenyang 110161China engineering research center for Dry and water-efficient Farming of Liaoning Province Shenyang 110161China College of Land and Environment Shenyang Agricultural UniversityShenyang 110161China engineering research center for Dry and water-efficient Farming of Liaoning Province Shenyang 110161China

The laws of water consumption in corn,peanuts and millet on the semi-drought area of western Liaoning Province were studied through the FAO-Penman Monteith method and the water balance *** three corps,the amount of the day water demand,the whole growth period water demand and the soil water deficit of corn were all the *** the same time,its degree of agreement between the water demand and the level of precipitation was the worst,and its average in crop coefficient was *** amount of th...

关键词： water consumption water use efficiency main crop semi-drought area

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高性能IPv6路由器网络管理体系结构研究

计算机工程与应用 2004年第28期40卷 125-127,155页

作者：唐浩贺磊王振兴国家数字交换系统工程技术研究中心解放军信息工程大学信息科学系郑州450002 南京理工大学计算机系南京210094

支持IPv6协议的高性能路由器是IPv6骨干网络的重要组成部分,其网络管理体系结构的设计是实现高效、稳定的路由器管理的核心内容。该文从高性能IPv6路由器的设计特点出发,针对其网管系统的设计需求,给出了相应网络管理体系结构的分析和设... 详细信息

支持IPv6协议的高性能路由器是IPv6骨干网络的重要组成部分,其网络管理体系结构的设计是实现高效、稳定的路由器管理的核心内容。该文从高性能IPv6路由器的设计特点出发,针对其网管系统的设计需求,给出了相应网络管理体系结构的分析和设计,同时考虑了对SNMPv3协议的支持问题。

关键词：网络管理体系结构 SNMP IPv6路由器 SMUX