802.11b-1999/Cor1-2001, IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan Area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications—Amendment 2: Higher-speed Physical Layer (PHY) extension in the 2.4 GHz band—Corrigendum1
標(biāo)簽： Telecommunications Information information technology
上傳時(shí)間： 2013-12-10
上傳用戶：gxf2016
IEEE 802.11d-2001, Amendment to IEEE 802.11-1999, (ISO/IEC 8802-11) Information technology--Telecommunications and information exchange between systems--Local and metropolitan Area networks--Specific requirements--Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Specification for Operation in Additional Regulartory Domains
標(biāo)簽： 802.11 IEEE Information technology
上傳時(shí)間： 2014-01-21
上傳用戶：壞天使kk
IEEE 802.11e-2005, IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan Area networks—Specific requirements Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Amendment 8: Medium Access Control (MAC) Quality of Service Enhancements
標(biāo)簽： Telecommunications IEEE Information information
上傳時(shí)間： 2016-10-02
上傳用戶：rishian
IEEE 802.11g-2003 IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan Area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications—Amendment 4: Further Higher-Speed Physical Layer Extension in the 2.4 GHz Band
標(biāo)簽： Telecommunications IEEE Information information
上傳時(shí)間： 2016-10-02
上傳用戶：cx111111
IEEE 802.11i-2004 Amendment to IEEE Std 802.11, 1999 Edition (Reaff 2003). IEEE Standard for Information technology--Telecommunications and information exchange between system--Local and metropolitan Area networks?Specific requirements--Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications--Amendment 6: Medium Access Control (MAC) Security Enhancements
標(biāo)簽： IEEE 802.11 Amendment Standard
上傳時(shí)間： 2013-12-21
上傳用戶：ywqaxiwang
IEEE 802.11j-2004 IEEE Standard for Information technology—Telecommunications and information exchange between systems--Local and metropolitan Area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications—Amendment 7: 4.9 GHz–5 GHz Operation in Japan
標(biāo)簽： Telecommunications IEEE Information information
上傳時(shí)間： 2014-01-17
上傳用戶：asasasas
RECOMMENDATION ITU-R M.1653*,** Operational and deployment requirements for wireless access systems including radio local Area networks in the mobile service to facilitate sharing between these systems and systems in the Earth exploration-satellite service (active) and the space research service (active) in the band 5 470-5 570 MHz within the 5 460 5 725 MHz range
標(biāo)簽： RECOMMENDATION requirements Operational deployment
上傳時(shí)間： 2016-10-21
上傳用戶：miaochun888
無線通信的各種運(yùn)動(dòng)模型。適用于移動(dòng)通信、無線傳感器網(wǎng)絡(luò)等領(lǐng)域。 包括：Random walk、random waypoint、random direction、boundless simulation Area、 gauss-markov等運(yùn)動(dòng)模型 - probabilistic random walk
標(biāo)簽： random simulation direction boundless
上傳時(shí)間： 2014-11-12
上傳用戶：libinxny
傳統(tǒng)的以太網(wǎng)是一個(gè)廣播型網(wǎng)絡(luò)，網(wǎng)絡(luò)中的所有主機(jī)通過HUB 或交換機(jī)相連，處在 同一個(gè)廣播域中。HUB 是物理層設(shè)備，沒有交換功能，接收的報(bào)文會(huì)向所有端口轉(zhuǎn) 發(fā)；交換機(jī)是鏈路層設(shè)備，具備根據(jù)報(bào)文的目的MAC 地址進(jìn)行轉(zhuǎn)發(fā)的能力，但在 收到廣播報(bào)文或未知單播報(bào)文（報(bào)文的目的MAC 地址不在交換機(jī)MAC 地址表中） 時(shí)，也會(huì)向除交換機(jī)報(bào)文入端口之外的所有端口轉(zhuǎn)發(fā)。 上述情況使網(wǎng)絡(luò)中的主機(jī)會(huì)收到大量并非以自身為目的地的報(bào)文，在浪費(fèi)大量帶寬 資源的同時(shí)，也造成了嚴(yán)重的安全隱患。 隔離廣播域的傳統(tǒng)方法是使用路由器，但是路由器成本較高，而且端口較少，無法 劃分細(xì)致的網(wǎng)絡(luò)。 為解決以太網(wǎng)交換機(jī)在LAN 中無法限制廣播的問題，出現(xiàn)了VLAN（Virtual Local Area Network，虛擬局域網(wǎng)）技術(shù)。
標(biāo)簽： 以太網(wǎng) 廣播 網(wǎng)絡(luò)
上傳時(shí)間： 2014-01-03
上傳用戶：qb1993225
This approach addresses two difficulties simultaneously: 1) the range limitation of mobile robot sensors and 2) the difficulty of detecting buildings in monocular aerial images. With the suggested method building outlines can be detected faster than the mobile robot can explore the Area by itself, giving the robot an ability to “see” around corners. At the same time, the approach can compensate for the absence of elevation data in segmentation of aerial images. Our experiments demonstrate that ground-level semantic information (wall estimates) allows to focus the segmentation of the aerial image to find buildings and produce a ground-level semantic map that covers a larger Area than can be built using the onboard sensors.
標(biāo)簽： simultaneously difficulties limitation addresses
上傳時(shí)間： 2014-06-11
上傳用戶：waitingfy
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