In the next generation of wireless communication systems, there will be a need for the rapid deployment of independent mobile users. Significant examples include establishing survivable, efficient, dynamic communication for emergency operations, disaster relief efforts, and military networks. Such network scenarios cannot rely on centralized and organized connectivity, and can be conceived as applications of mobile ad hoc networks. A MANET is an autonomous collection of mobile users that communicate over relatively bandwidth constrained wireless links. Since the nodes are mobile, the network topology may change rapidly and unpredictably over time. The network is decentralized, where all network activity including discovering the
標簽： communication generation the wireless
上傳時間： 2014-01-07
上傳用戶：cuibaigao
In the next generation of wireless communication systems, there will be a need for the rapid deployment of independent mobile users. Significant examples include establishing survivable, efficient, dynamic communication for emergency operations, disaster relief efforts, and military networks. Such network scenarios cannot rely on centralized and organized connectivity, and can be conceived as applications of mobile ad hoc networks. A MANET is an autonomous collection of mobile users that communicate over relatively bandwidth constrained wireless links. Since the nodes are decentralized, where all network activity including discovering the
標簽： communication generation the wireless
上傳時間： 2014-01-04
上傳用戶：tedo811
樓術描述項: (1).該項目中"我的電腦"是作者自定義的root節點,沒有設定其路徑,所以BeforeExpand事件中會從它開始依次遍歷,但"我的電腦"會提示"沒有指定路徑".故需要if(e.Tag.ToString() != "我的電腦")判斷.同時"我的文檔"需要再次獲取其路徑,依次實現Add子節點; (2).同時在"我的文檔"和盤符中需要添加tNode.nodes.Add("")加載空節點形成+號,如果沒有該+號,BeforeExpend事件不會被調用,子目錄無法獲取加載,在BeforeExpand事件調用TreeViewItems.Add加載其子結點需要e.nodes.Clear();清除該結點的子目錄再加載. (3).提供兩篇類似文章供大家學習,經過對比可以發現:第一篇僅從驅動器(C盤)開始加載,所以BeforeExpend簡單展開子目錄即可,不需要判斷"我的電腦"和"我的文檔".第二篇含"桌面",因此需要判斷路徑:"C# TreeView磁盤文件,AfterSelect顯示加號-駱駝祥子" 和"Treeview樹狀顯示文件夾" .同時補充一篇很優秀的文章供大家學習"WinForm應用：ListView做圖像瀏覽" (4).補充TreeView(樹視圖)事件:更詳細見"c# 樹狀視圖(TreeView類)". 事件 描述 AfterCheck 在選中節點復選框后引發 AfterCollapse 在折疊一個節點后引發 AfterExpand 在擴展一個節點后引發 AfterSelect 在選中一個節點后引發 BeforeCheck 在選中節點復選框之前引發 BeforeCollapse 在折疊一個節點之前引發 BeforeExpand 在擴展一個節點之前引發 BeforeSelect 在選中一個節點之前引發 (5).補充兩個關于論壇討論"c#怎樣動態讀取資源文件里的圖片"和"在C＃中怎么調用Resources文件中的圖片" (6).在《C#典型模塊與項目實戰大全》(清華大學出版社-丁士鋒)書中談到,出于對程序響應性能考慮,它先加載盤符結點,沒有使用遞歸一次性加載所有文件到樹狀列表中,代碼通過AfterSelect事件和FileSystemWatcher控件,監聽加載.并使用線程池Task更新加載TreeView,希望大家去學習. 總結 該篇通過TreeView加載了磁盤目錄路徑,并通過ImageList加載圖標.那么怎樣實現閱讀文件夾下文件,獲取其圖標、文件大小、擴展名等信息,并雙擊打開文件呢?下一篇將接著講述.最后希望該文章對大家有所幫助,文章中很多鏈接都可以供覺得有用的同學學習,感謝上面提到的文章及書籍作者.同時如果文章中有錯誤或不足之處請原諒,有問題或建議者亦可提出.希望尊重作者勞動果實勿噴.
上傳時間： 2016-08-15
上傳用戶：baobao9437
Throughout the course of my work in multihop mobile ad hoc networks (MANET) over the last several years, I reached the conclusion that mobility models and perfor- mance metrics need to be treated in detail in designing these networks that are the ultimatefrontierinwirelesscommunications. Awidevarietyofmobilitymodelscan be used by mobile nodes.
標簽： Handbook Networks Mobility Mobile Models Hoc for Ad of
上傳時間： 2020-05-27
上傳用戶：shancjb
Complex networks are powerful allies of our quest to tackle complexity in all of science. Many lines can be written about the benefits of using networks to study complex systems. Nevertheless, if I had to name their single most appealing property,Iwouldsaysimplicity.Onecanmaptheinteractingelementsofanysystem to a set of nodes, and connect these nodes with a set of links according to their interactions.
上傳時間： 2020-05-27
上傳用戶：shancjb
Advances in communication and networking technologies are rapidly making ubiq- uitous network connectivity a reality. Wireless networks are indispensable for supporting such access anywhere and at any time. Among various types of wire- less networks, multihop wireless networks (MWNs) have been attracting increasing attention for decades due to its broad civilian and military applications. Basically, a MWN is a network of nodes connected by wireless communication links. Due to the limited transmission range of the radio, many pairs of nodes in MWNs may not be able to communicate directly, hence they need other intermediate nodes to forward packets for them. Routing in such networks is an important issue and it poses great challenges.
標簽： Multihop Wireless Networks
上傳時間： 2020-05-31
上傳用戶：shancjb
Heterogeneous Network (HetNet): A network that consists of a mix of macro cells and low-power nodes, e.g. Pico, Femto, Relay Node (RN) and Remote Radio Head (RRH)
標簽： Efficient Spectrum Energy and
上傳時間： 2020-06-01
上傳用戶：shancjb
A wireless communication network can be viewed as a collection of nodes, located in some domain, which can in turn be transmitters or receivers (depending on the network considered, nodes may be mobile users, base stations in a cellular network, access points of a WiFi mesh etc.). At a given time, several nodes transmit simultaneously, each toward its own receiver. Each transmitter–receiver pair requires its own wireless link. The signal received from the link transmitter may be jammed by the signals received from the other transmitters. Even in the simplest model where the signal power radiated from a point decays in an isotropic way with Euclidean distance, the geometry of the locations of the nodes plays a key role since it determines the signal to interference and noise ratio (SINR) at each receiver and hence the possibility of establishing simultaneously this collection of links at a given bit rate. The interference seen by a receiver is the sum of the signal powers received from all transmitters, except its own transmitter.
標簽： Stochastic Geometry Networks Wireless Volume and II
上傳時間： 2020-06-01
上傳用戶：shancjb
A mobile ad-hoc network (MANET) is formed by multiple moving nodes equipped with wireless transceivers. The mobile nodes communicate with each other through multi-hop wireless links, where every node can transmit and receive information. Mobile ad-hoc networks have become increasingly important in areas where deployment of communications infrastructure is difficult.
標簽： Telecommunications Modeling
上傳時間： 2020-06-01
上傳用戶：shancjb
A wireless ad-hoc network is a wireless network deployed without any infrastructure. In such a network, there is no access point or wireless router to forward messages among the computing devices. Instead, these devices depend on the ad-hoc mode of their wireless net‐ work interface cards to communicate with each other. If the nodes are within the transmis‐ sion range of the wireless signal, they can send messages to each other directly. Otherwise, the nodes in between will forward the messages for them. Thus, each node is both an end system and a router simultaneously.
上傳時間： 2020-06-01
上傳用戶：shancjb
