陣上失風 的英文怎麼說
中文拼音 [zhènshàngshīfēng]
陣上失風
英文
be caught in the （very） act-
At first we compare some kinds of investment loss function, analyze their defects and take the eignvalue of covariance matrix as the measurement of investment risk, the principle component as the information of investment market, sn and cv of the principle component as balance relationship between the profit and risk. then different portfolio selection indexes are given, and new portfolio selection models are presented, which are different from h. markowitz model. at last an example is also given
本文首先比較了幾種常用的投資損失函數，在分析它們的缺陷與不足的基礎上，提出了採用收益率的協方差矩陣的特徵根刻畫投資的風險；用主成份綜合反映證券市場的信息；分別採用主成份的差異系數與信噪比反映投資組合的期望收益率與風險之間的均衡關系，並以此作為投資組合損失最小化與收益極大化的指標；得到了不同於hEvery girl in or near meryton was out of her senses about him for the first two months ; but he never distinguished her by any particular attention, and consequently, after a moderate period of extravagant and wild admiration, her fancy for him gave way, and others of the regiment who treated her with more distinction again became her favourites.
在開頭一兩個月裏面，麥里屯一帶的姑娘們沒有哪一個不為他神魂顛倒可是他對她卻不曾另眼相看。后來那一陣濫愛狂戀的風氣過去了，她對他的幻想也就消失了，因為民兵團里其他的軍官們更加看重她，於是她的心又轉到他們身上去了。 」On the strength of the square loss function, this part also defines the vector loss function and matrix loss function, and discusses the bayesian risk decision solutions about random vector parameter and random matrix parameter under these loss functions respectively. secondly, the bayesian inference theory about single equation model is explored
在單參數平方損失函數的基礎上，定義了向量損失函數，利用向量化運算元vec定義了矩陣損失函數，並討論了這兩類損失函數下隨機向量參數和隨機矩陣參數的貝葉斯風險決策解。
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