數(shù)據(jù)設(shè)計外文翻譯-其他專業(yè)(已改無錯字)
2023-03-03 12:00:50 本頁面
【正文】 ir jobs today, but is this a consequence of the real job that need to get done, or is it a symptom of the puter application? Using humans as input devices, particularly for data that is voluminous, consistent in format (as on forms), and in a limited range of variability, is an expensive and antiquated, not to mention dehumanizing, method of capturing data. This may sound like so much philosophy, but it has practical import in the way application design is done. People use data, but they do tasks. And they don’t do tasks through o pletion one at a time. They do several tasks that are subset of or in intersection with each other, and they so them all at once, in parallel. When designers allow this idea to direct the analysis and creation of an Application, rather than focusing on the data orientation that has been historically dominant, the very nature of the effort changes significantly. Why have windowing environments been so they allow a user to shut down and exit one in order to begin another. The windowing environment es closer to mapping the way people really think and work than the old one thing at a time approach ever did. This lesson should not be lost. It should be built upon. Understanding the application tasks means going far beyond identifying the data elements, normalizing them, and creating screens, processing programs, and reports. It means really understanding what the users do and what their tasks are, and designing the application to be responsive to those tasks, not just to capture the data, associated with them. In fact, when the orientation is toward the data, the resulting design will inevitably distort the user’ s tasks rather than support them. How do you design an application that is responsive to tasks rather than biggest hurdle is simply understanding that focusing on tasks is necessary. This allows you to approach the analysis of the business from a fresh perspective. 附錄 B 數(shù)據(jù)設(shè)計 1. 數(shù)據(jù)類型和值域 任何一個曾經(jīng)編過程的人都習(xí)慣了這樣一個事實(shí)：你不得不告訴計算機(jī)信息是一個整數(shù)，實(shí)數(shù)，字符串，布爾值或其它的值。大多數(shù)計算機(jī)由一個整數(shù)加法電路，又有一個實(shí)數(shù)加法電路，而且，通常字符串相加當(dāng)然沒有任何意義。因為在內(nèi)存中的比特資料可以被解釋成任何一種形式，計算機(jī)必須被告訴去做什么。這就是我們熟知的類型。定義資料對象為一個特定的類型對事物內(nèi)部代表的定義有影響。舉例來說，在大多數(shù)現(xiàn)代計算 機(jī)框架內(nèi)部整數(shù)表示為 32位比特數(shù)的形式。在外部，整數(shù)表
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