【正文】 Microsoft Office Access 2021 網(wǎng)站設(shè)計與實現(xiàn) .北京 :電子工業(yè)出版社， [10]王易 .ASP 網(wǎng) 站 設(shè)計實例通 .北京 :清華大學(xué)出版社， 論文附件 一、英文原文 Understanding multicast stations A station is used to multicast an ASF stream to a client, specifically Microsoft Windows Media Player. Multicasting minimizes the work bandwidth used. If clients do not use the station to receive the ASF stream, then each client requires its own connection to a server. This quickly consumes work bandwidth and limits the ability of the work to deliver information. Distribution mode is a station characteristic that defines whether a station is to be used for multicasting, distribution, or both. ? Multicast stations deliver ASF streams to many clients but use only the bandwidth of a single stream. ? Distribution stations deliver ASF streams to other Windows Media servers via unicast. A station that is solely a distribution station does not have an IP address or port, so clients cannot view the stream that the station delivers. ? Stations enabled for multicast and distribution deliver ASF streams to other Windows Media servers via unicast. Clients can also view the ASF content on this station via multicast. A station contains all the information needed to deliver an ASF stream to Windows Media Player, including IP address, port, stream format, timetolive (TTL) value, and so on. This information is stored in an .nsc file. Windows Media Player must be able to access the .nsc file so that it can locate the IP address that the station is using to stream ASF content. The .nsc file is typically made available to Windows Media Player from a shared work directory or from a Web server directory. Windows Media Player extracts the URL to the .nsc file when it opens an announcement that is delivered to it in an message, via UNC path, or from a Web page link. The Multicast Stations page in Windows Media Administrator is the access point for creating and managing stations. This page also provides an interface for anizing streams into the programs delivered on the stations you create. Understanding distribution stations A distribution station is a helper station. It delivers an ASF stream from Windows Media server A to a station on Windows Media server B so that Windows Media server B can multicast that ASF content. A distribution station provides a way to: ? Distribute a stream between work segments that are not connected by multicastenabled routers. ? Distribute a stream past a firewall. Other stations access the distribution station by creating a connection to the distribution station .nsc file using the MSBD protocol. For example, if you want Station2 on ServerB to multicast the ASF content from distribution station, Station1 on ServerA, you use Station1 as the stream source. That is, the stream source for Station2 is Note When you distribute streams between servers, you must not exceed the distribution limit, the number of MSBD connections that a distribution station can acmodate. By default, a distribution station can support only five MSBD connections to other stations. As you configure stations on remote Windows Media servers to use a distributed ASF stream, you must adjust the distribution station Distribution Limit to acmodate the additional remote connections, or use more than one distribution station as the source for the remote station. For more information about adjusting the Distribution Limit, see Editing station properties. Delivering streams over a nonmulticastenabled work If your work does not use multicast routers, you can multicast a stream only within the work segment that contains Windows Media server ponents. Clients on other segments of the work cannot receive the ASF stream multicast because it does not originate within their segment. Clients throughout the work can still receive the stream if the ASF content is multicast within the local segment, and distributed to Windows Media servers on the other work segments. The station on the local work segment must have both multicast and distribution cap。 劉亮老師 平易近人的作風(fēng)、對知識的敏銳思維、嚴(yán)謹(jǐn)治學(xué)的風(fēng)范和孜孜不倦的科研精神永遠都是我學(xué)習(xí)的榜樣。希望在以后的工作中不斷學(xué)習(xí)，完善該系統(tǒng)的功能，使它更加人性化。 該系統(tǒng)在界面設(shè)計上比較粗糙，整體頁面布局不夠美觀。 目前，該 在線投票 系統(tǒng) 還有不少問題需要進一步解決。 % 結(jié)論 本文詳細闡述了 在線投票系統(tǒng)的 設(shè)計（包括功能模塊設(shè)計、 數(shù)據(jù)庫結(jié)構(gòu)設(shè)計等），并實現(xiàn)了投票 系統(tǒng)的 主要生成百分比 功能及其它功能。user_idamp。 WHERE user_id like 39。new_password1amp。 (4)使用 SQL 語句修改密碼，代碼如下： % =UPDATEclassuserSET user_password=39。代碼如下： % dim user_id,old_password,new_password1,new_password2 user_id=request(user_id) old_password=request(old_password) new_password1=request(new_password1) % (2)判斷新密碼和確認(rèn)新密碼是否相符，如果不相符，提示用戶輸入錯誤并重新生成表格。 提交和重填 按鈕。 密碼框 —— 用來驗證新密碼。密碼框 —— 用來輸入新密碼。密碼框 —— 用來輸入原密碼。 文本框 —— 用來輸入用戶名。 設(shè)計修改密碼表單 修改密碼表單由以下幾部分組成。圖 47 為用戶登錄頁面。 rs(user_password).Value If Rtrim(rs(0).Value)=user_password Then Session(logined)=1 在這段程序中，使用 Session對象的 logined變量來記錄用戶是否登錄成功，當(dāng) logined 變量為 1,表示登錄成功，變量為 0 則表示登錄失敗。%+user_id+%39。如果相同則表示用戶輸入的密碼正確，否則表示用戶輸入的密碼錯誤。驗證密碼 End If % (4)驗證用戶名密碼是否正確。+user_id+39。要判斷數(shù)據(jù)庫中是否存在 投票選項 投票結(jié)果運算 編輯 編輯、添加、 刪除 生成最 終結(jié)果 用戶輸入的用戶名，可以在表“ classuser”中統(tǒng)計 user_id 字段的內(nèi)容與用戶輸入的用戶名相匹配的記錄總數(shù)，如果為 0，表示用戶名錯誤，提示用戶重新輸：如果不為 0，說明用戶名存在，然后進入驗證密碼步驟。 驗證 管理員的用戶和密碼 驗證管理員的用戶和密碼的步驟如下： (1) 使用 Request對象的 Form集合得到用戶輸入的用戶名和密碼代碼如下： % dim user_id,user_password user_id=request(user_id) user_password=request(user_password) % (2) 建立數(shù)據(jù)庫連接，代碼與前面連接數(shù)據(jù)庫的代碼相同。 訪問的時間 If vRef= Then vRef = 直接輸入或書簽導(dǎo)入 End If % 圖 45重復(fù)投票提示框 圖 46投票結(jié)果百分比顯示 數(shù)據(jù)導(dǎo)入 圖 47 投票生成圖 用戶管理模塊的設(shè)計 管理員登錄的設(shè)計與實現(xiàn) 設(shè)計管理員登錄表單 管理員登錄表單由以下 3部分組成 ［ 1］ ： amp。瀏覽器 vOS = System(vSoft) 39。訪問前的網(wǎng)址 39。 (url) vSoft = (HTTP_USER_AGENT)