页面抓取本质上是HTML页面的反向工程，也可以看成页面解释器，网页以HTML编码，HTML以树型结构表示信息，实际数据与布局代码以及效果信息混杂在一起，不能被计算机直接利用。
It can also be thought of as parsing out chunks of information from a page. Web pages are coded in HTML, which uses a tree-like structure to represent the information.
建立了描述反向凝固结晶器中流动与传热的数学模型，并在此模型基础上进行了计算机模拟和仿真。
The mathematical model which describes the flow and heat transfer in inverse solidifying mold was established. Base on the model, a series of study with computerized simulation was taken.
大型松紧调节臂不断从进料加工过程中反向弯曲的材料速度与管张力通过计算机自动调整。
Large dancer arm keeps material from being reverse-bent during the feed process Speed and tube tension are auto-adjusted by computer.
应用推荐