例句與造句

1. it redefines the between-class scatter by adding a weight function according to the between-class distance . therefore, it can separate the classes as much as possible . at the same time, it projects the between-class scatter into the null space of the within-class scatter that contains the most discriminant information
   新方法重新定義了樣本類(lèi)間離散度矩陣，在原始定義的基礎(chǔ)上增加一個(gè)由類(lèi)間距離決定的可變權(quán)函數(shù)，使得在選擇投影方向時(shí)，能夠更好地分開(kāi)各個(gè)類(lèi)的樣本。
2. first, we do not know what kind of bifurcation will happen in advance, it is difficult to choose what kind of regular extended system for detecting them . second, if there are higher order singularities, even the multi-dimensional null space, one parameter is not enough for establishing a regular extended system
   首先考慮單參數(shù)非線性問(wèn)題，如果參數(shù)的個(gè)數(shù)足夠多，在延拓過(guò)程中通過(guò)求解各種正則的擴(kuò)展系統(tǒng)可以求出方程解枝上存在的各種高階奇異點(diǎn)，例如高階折疊點(diǎn)、橫截式分歧點(diǎn)、音叉式分歧點(diǎn)等。
3. It's difficult to find null spaces in a sentence. 用null spaces造句挺難的