简介：Aimingattheproblemssuchasmorerepeatedlydesignandlongerdesigncycle,inthispaper,thesimilaritytheorywasintroducedtothedesignprocessofthekeystructuresofflotationmachine.TheimpellerandU-shapedtankofflotationmachinesystemwereanalyzedassimilarityunit.Meanwhile,thelevelofsimilarityoftheunitsandthesimilarityofthesystemwerecalculated.BasedontheanalysisoftheimpellerandthesizeofU-shapedtank,thesimilaritycriteriawerederived.Thederivedconclusionsare:(1)Therelationshipbetweenthediameteroftheimpellerandthevolumeofthetankwaspowerfunctionandcalculatedasthesimilaritycriteriaoftheimpeller;(2)TherelationshipbetweentheratiobetweentheU-shapedtank’scross-sectionalareaandimpeller’sdiameterandthevolumeofthetankwaspowerfunctionandcalculatedasthesimilaritycriterionsoftheU-shapedtank.Usingthesimilaritycriterioncombinedwithcomputertechnologyanddatabasetechnologytorealizepartandsystemserializationdesign.Theresultsshowthattheresearchcanavoidrepeatedlydesign,shortendesigncycle,andraisethedesignefficiency.

简介：OPPO给人的最大感觉是贴近用户。我们能在OPPO的官方社区上直接沟通，包括使用的技巧．使用方等等。不一而足．都能在官方社区找到答案。这是自OPPO蓝光播放器开始之际就保持的一种交流习惯．也让用户能够更容易弄懂自己手中的家伙究竟怎样用更顺手。

简介：随着计算机网络教学的不断发展,网上考试系统将是考试方式改革的重要方向.本文设计了一套适合本校信息工程系教学工作的网上考试系统.该系统采用J2EE和AJAX相结合的技术,适合于任何Web方式下的考试.