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單項(xiàng)選擇題
關(guān)于以下$map["status&score&title"] =array("1",array("gt","0"),"wechat","_multi"=>true);實(shí)現(xiàn)的查詢條件是？
A、status= 1 AND score >0 AND title = "wechat"
B、status> 0 AND score >0 AND title >0
C、status= 1 AND score >0 AND title = "true"
D、status= 1 AND score >=0 AND title = "wechat"
B、status> 0 AND score >0 AND title >0
C、status= 1 AND score >0 AND title = "true"
D、status= 1 AND score >=0 AND title = "wechat"
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問(wèn)答題
線性化之后的模型與原模型相比，可行域增大了，但最優(yōu)值相等。
答案：
線性化是將非線性模型轉(zhuǎn)換為線性模型的過(guò)程，通常在求解非線性規(guī)劃問(wèn)題時(shí)使用。線性化通常涉及在某一點(diǎn)附近用線性函數(shù)近似非線性...
