外文翻譯----高級(jí)數(shù)據(jù)庫(kù)應(yīng)用-全文預(yù)覽
【正文】 from nearby traffic). ■ Handwritten data A member of staff may create notes while carrying out inspections of properties for rent. At a later data, he or she may wish to query such data to find all notes made about a flat in Novar Drive with dry rot. Digital publishing The publishing industry is likely to undergo profound changes in business practices over the next decade. It is being possible to store books, journals, papers, and articles electronically and deliver them over highspeed works to consumers. As with office information systems, digital publishing is being extended to handle multimedia documents consisting of text, audio, image, and video data and animation. In some cases, the amount of information available to be put online is enormous, in the order of petabytes (1015 bytes), which would make them the largest databases that a DBMA has ever had to manage. Geographic information systems (GIS) A GIS database stores various types of spatial and temporal information, such as that used in land management and underwater exploration. Much of the data in these systems is derived from survey and satellite photographs, and tends to be very large. Searches may involve identifying features based, for example, on shape, color, or texture, using advanced patternrecognition techniques. For example, EOS (Earth Observing System) is a collection of satellites launched by NASA in the 1990s to gather information that will support sci8entists concerned with longterm trends regarding the earth’s atmosphere, oceans, and land. It is anticipated that these satellites will return over onethird of a petabyte of information per year. This data will be integrated with other data 信息與計(jì)算科學(xué)畢業(yè)設(shè)計(jì) 5 sources and will be stored in EOSDIS (EOS Data and Information System). EOSDIS will supply the information needs of both scientists and nonscientists. For example, schoolchildren will be able to access EOSDIS to see a simulation of world weather patterns. The immense size of this database and the need to support thousands of users with very heavy volumes of information requests will provide many challenges for DBMSs. Interactive and dynamic Web sites ■ Consider a Web site that has an online catalog for selling clothes. The Web site maintains a set of preferences for previous visitors to the site and allows a visitor to: ■ browse through thumbnail images of the items in the catalog and select one to obtain a fullsize image with supporting details。 ■ select accessories to go with the outfit, from items presented in a sidebar。在數(shù)據(jù)庫(kù)方面， 可以看到RDBMS 廣泛應(yīng)用于傳統(tǒng)行業(yè)，例如訂單處理、庫(kù)存控制、銀行業(yè)務(wù)、航班預(yù)定等。這種類型的設(shè)計(jì)具有一些普遍的特征： ■ 設(shè)計(jì)數(shù)據(jù)具有多類型的特點(diǎn)，每一種類型都有較小數(shù)量的實(shí)例。 ■ 設(shè)計(jì)不是靜止的，而是隨著時(shí)間的推移在變化。單個(gè)修改可能會(huì)影響到許多涉及對(duì)象。其實(shí)這樣，最終產(chǎn)品必須是椅子和協(xié)調(diào)的。 還可能有控制各種各樣物理過(guò)程的應(yīng)用， 比如打開(kāi) 閥門、 給反應(yīng)堆容器加熱和增加冷卻系統(tǒng)的流量。 操作人員可以隨時(shí)基于系統(tǒng)必須保持的復(fù)雜歷史數(shù)據(jù)優(yōu)化性能，調(diào)整這些規(guī)則。 與 CAD 類似，設(shè)計(jì)可能非常大，并且一般的協(xié)作工程。這些系統(tǒng)執(zhí)行諸如網(wǎng)絡(luò)路徑管理、 問(wèn)題管理和網(wǎng)絡(luò)規(guī)劃等任務(wù)。威力路由連接、診斷問(wèn)題和負(fù)載平衡，網(wǎng)絡(luò)管理系統(tǒng)必須具有實(shí)時(shí)在這個(gè)復(fù)雜的圖中移動(dòng)的能力。例如， 一個(gè)多媒體文檔可能包含文本、照片、電子數(shù)據(jù)表和語(yǔ)音解說(shuō)。使用電子設(shè)備手寫輸入的需求也在日益上升。 一些查詢可能只是簡(jiǎn)單地使用文本的描述來(lái)標(biāo)識(shí)想要房產(chǎn)的圖像。但也存在某些情形，用戶使用所希望房產(chǎn)的某些視頻特征（例如海景或群山環(huán)繞）來(lái)查詢會(huì)更好。 ■ 手寫數(shù)據(jù)：工作人員可能在檢查出租房產(chǎn)的同時(shí)進(jìn)行記錄。在辦公信息系統(tǒng)的支持下數(shù)字出版能夠處理包含文本、音頻、 圖像視頻數(shù)據(jù)和動(dòng)畫組成的多媒體文檔?？梢允褂孟冗M(jìn)的模式識(shí)別技術(shù)根據(jù)外形、顏色材質(zhì)等標(biāo)識(shí)特征搜索。 EOSDIS 將同時(shí)為科學(xué)家和其他人員提供所需要的信息。站點(diǎn)保持著本站點(diǎn)的訪問(wèn)者偏愛(ài)信息的同居數(shù)據(jù)，并且允許訪問(wèn)者： ■ 瀏覽目錄中所有項(xiàng)目的縮略圖像， 并且可以選定其中一個(gè)得到完全大小的圖像以詳細(xì)信息 ■ 尋找符合用戶定義一組標(biāo)準(zhǔn)的項(xiàng)目。 ■ 選擇一個(gè)畫外音解說(shuō)，給出關(guān)于這種款式的更加詳細(xì)的信息。除了處理復(fù)雜的 數(shù)據(jù)外，站點(diǎn)還因?yàn)橐峁?3D 透視圖而增加了復(fù)雜度。隨著 Interent 的普及以及技術(shù)的更加復(fù)雜， Web 站點(diǎn)和企業(yè)對(duì)企業(yè)交易將處理更加復(fù)雜和相關(guān)連的數(shù)據(jù)。 。 ■ 專家系統(tǒng)，存儲(chǔ)人工智能（ AI）應(yīng)用的知識(shí)和規(guī)則。
畢業(yè)設(shè)計(jì)相關(guān)推薦
鄂ICP備17016276號(hào)-1