[情報] Canon G3X
http://chinese.engadget.com/2015/02/05/canon-powershot-g3-x/
1" CMOS,135等效24-600mm(25x光學變焦)!
Canon Rumors
http://www.canonrumors.com/2015/02/official-canon-powershot-g3-x-coming-some-day/
http://ppt.cc/8hUJ
名牌、變攜、高倍光學變焦,價錢OK的話可以成為新一代家長愛用機喔XD
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對角矩陣在矩陣家族中是個非常特別的現象。通常矩陣相乘很麻煩,因為不滿足交換率,
使得矩陣運算變的不容易處理。然而對角矩陣相乘,即為對角線相對應元素各自相乘,
因此對角矩陣必定滿足交換率。且對角矩陣determinant即為對角元素相乘,計算簡單,
特徵值、rank皆非常容易計算;對角矩陣簡直不是矩陣,矩陣帶給人類的困擾到對角矩陣
全部消失了;它有矩陣之形貌,卻無矩陣之傲嬌,他就是療癒系的矩陣。
出自 民明書房刊 線性代數與矩陣之屬性
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