简介：通过分析ZigBee协议中Cluster—Tree和AODVjr算法的优缺点，提出一种基于Cluster—Tree＋AODvjr的优化路由算法。该算法利用ZigBee协议中的邻居表，通过定义分区来确定目的节点的范围，从而控制广播RREQ分组的跳数，防止无效的RREQ泛洪。此优化算法能够有效地减小路由跳数，缩短传输时延，减少网络中死亡节点的数量，提高数据传送的成功率。

简介：fruit and gingerbread.The popularity of the Christmas tree grew in Britain during the first half of the 20th century,which was too heavy and kept breaking. It was only in the mid 20th century that a viable alternative was found.Artificial trees were invented in the 1880's in a bid to try and stop some of the damage being caused to real trees due to people lopping the tip off large trees,Martin Luther (the founder of the Protestant religion) was the first to decorate an indoor tree with candles when he attempted to recreate the stars shining over a forest of evergreens.The first mention of decorated trees being taken indoors came in 1605 in Germany - a country with a long Christmas tree history

简介：也许你知道自己的星座，幸运花；可是你知道你的生日树吗？不同的月份有着不同的品种，或者坚强、或者挺拔、或许美丽无比……

简介：茹越悦：和平树上，枝叶茂盛，总有鸽子前来小憩。有一天，来了一群小学生，他们在树叶上写下了自己的心愿。于是，和平树带着对和平与美好的希冀，继续蓬勃生长。

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简介：圣诞节的夜晚，最不能缺少的是光彩夺目的圣诞树。一棵棵漂亮的圣诞树把圣诞节的夜晚装扮得绚丽多彩，美仑美奂……

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简介：

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简介：fruit and gingerbread.The popularity of the Christmas tree grew in Britain during the first half of the 20th century,which was too heavy and kept breaking. It was only in the mid 20th century that a viable alternative was found.Artificial trees were invented in the 1880's in a bid to try and stop some of the damage being caused to real trees due to people lopping the tip off large trees,Martin Luther (the founder of the Protestant religion) was the first to decorate an indoor tree with candles when he attempted to recreate the stars shining over a forest of evergreens.The first mention of decorated trees being taken indoors came in 1605 in Germany - a country with a long Christmas tree history

简介：在属于我们青春的LemonTree上，终于长出了友谊Lemon了。

简介：Alongtimeago,therewasahugeappletree.Alittleboylovedtocomeandlayarounditeveryday.Heclimbedtothetreetop,atetheapples,tookanapundertheshadow…Helovedthetreeandthetreelovedtoplaywithhim.Timewentby…Thelittleboyhadgrownup

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简介：看，有一个可爱的女孩，她正在大树下听音乐，绿荫和欢乐正笼罩着她。哈哈，这是我的伞画。有人能在扇子上作画，我却能在伞上画画。我为伞画取了个名字《树荫下》，它的灵感来自一首轻音乐——《绿色花园》。

简介：ＴｈｅＭａｒｖｅｌｏｕｓＧｉｎｇｋｏＴｒｅｅＢｙＣＨＥＮＳＨＵＰＥＮＧＤＯＵＢＴＬＥＳＳｅｖｅｒｙｏｎｅｈａｓｈｅｒｄｏｆｔｈｅｇｉｎｇｋｏ，ｂｕｔｆｅｗｋｎｏｗｈｏｗｓｐｅ－ｃｉａｌａｔｒｅｅｉｔｒｅａｌｌｙｉｓ．Ｓｃｉｅｎｔｉｓｔｓｃａｌｌｔｈｅ...

简介：圣诞树圣诞树是圣诞节必不可少的装饰。圣诞树都是由常青树（如小棕树或小松树）装饰而成。树上布满五颜六色的小蜡烛或小电电灯，再挂上各式各样的装饰品与彩带。

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简介：簇建筑学在高端计算起一个重要作用过去的20年了。与因特网服务，大数据，和云计算的来临，传统的簇面对三挑战：1)在计算，存储器，和I/O能力之中提供灵活系统平衡；2)减少资源分享开销；并且3)探讨低表演力量效率。这份位置报纸建议定义软件的簇(SDC)体系结构处理这些挑战。SDC建筑学继承传统的簇的二个特征：它的建筑学是multicomputer和它泛泛地联合相连。SDC提供二新机制：全球I/O空间(GIO)和遥远的设备的支持硬件的本国的存取(HNA)。应用程序软件能定义从水池由物理簇提供了的资源适合到它的需要的虚拟簇最好，并且传统的簇生态系统不需要修正。我们也讨论一个原型图案和利用SDC建筑学的一个32处理器云服务者的实现。

简介：集群是一个广泛使用的术语，意思是通过软件和网络连接把独立的计算机结合成一个统一的系统。在最基础的层面上，当共同使用两个或多个计算机解决一个问题的时候，就可以把它看作一个集群系统。集群通常用于高可用性(HA)以获得高可靠性，或者用于高性能计算(HPC)，以提供单个计算机力所不及的强大计算能力。按照定义，计算机集群就是一组互连的计算机，作为一个并行计算机系统而共同工作。

简介：ＯｎＳｏｄｉｕｍＣｌｕｓｔｅｒＣｏｌｌｉｓｉｏｎＤｙｎａｍｉｃｓＯｎＳｏｄｉｕｍＣｌｕｓｔｅｒＣｏｌｌｉｓｉｏｎＤｙｎａｍｉｃｓ￥ＺｈａｎｇＦｅｎｇｓｈｏｕ；Ｅ．ＳｕｒａｕｄａｎｄＲ．ＧｌｏｗｉｎｓｋｉＡｄｉｓｔａｌｌｃｅ－－ｄｅｐｅｎｄｅｎｔｔｉｇ...