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作者 theory 在 PTT [ Physics ] 看板的留言(推文), 共323則
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2F推:Brewster angle 只定義在 P 偏極的入射時的某一個角度06/05 18:23
3F→:但從你的問題的敘述中我只感覺你不太了解定義..06/05 18:24
6F推:我還是建議你去查一下 wiki,看看定義06/06 02:35
7F→:入射角偏離 Brewster angle 後反射率增加06/06 02:36
8F→:極化方向與入射面夾一個角度,有S及P偏極分量,反射率增加06/06 02:37
6F推:你說對了,它的解就是 Hermite polynomial,基態是高斯分布05/31 02:14
7F→:至於這個 transverse mode 的微方就是由共振腔邊界條件決定05/31 02:16
5F→:一樓講的是時間上的分布,也就是脈衝,但原 PO 問的是空間05/31 02:16
1F推:HF 最大的不準就是因為他完全沒有包含 correlation energy05/11 01:52
2F→:雖然說這個能量占總能很少很少,但是常常科學家關心的就是05/11 01:52
3F→:那一點點能量間的變化,但以數學上來看,HF是很好數值方法05/11 01:54
4F→:至於 correlation energy 的定義,我只稱他為 "exchange05/11 01:56
5F→:energy 以外算不準的部分",因為不是所有方法的 exchange05/11 01:57
6F→:都是 HF,至於 DFT 整個構想都是很革命性的,的確非常神奇05/11 01:58
10F→:CI、CC、MP 的無限項那只是說得簡單,根本不可能做得到05/10 16:08
11F→:我不知道你是否清楚 DFT 的原理,Functional 選對了是有可05/10 16:09
12F→:能達到 exact solution,的確是沒有系統的方法去逼近沒錯05/10 16:10
13F→:DFT 會這麼好用是因為它結果不錯,耗時相對短,原因來自那05/10 16:12
14F→:些 Functional,而且可以不斷改良,只是有點作弊就是了05/10 16:15
26F→:雖然不清楚樓上是否跟我想得一樣,但某些層面來說,是的 :)05/11 02:07
27F→:至於 k 大,你可以把你的認知敘述一下嗎? 這樣比較有效率05/11 02:08
2F推:想要最高檔的請至 CVI 訂購 XDXD05/08 23:48
1F推:那跟你的光學元件的曲率、厚度..等都有關,就算有也很複雜04/28 12:32
2F→:如果你是做實驗的人,直接去做實驗不要算那種東西耗時間..04/28 12:34
13F推:這篇有恨液 XD04/28 03:06
1F推:目前只有超導體可以讓磁力線不穿過,其他材料不行吧04/20 00:01
2F→:但你可用很強的磁性材料將磁力線吸引過去,使其幾乎不穿過04/20 00:01
1F推:我可以先請問一下何謂"有限能階"嗎?04/19 00:02