Based on the diffusion equation, the transition probability density of stock prices is calculated by means of the Monte-Carlo method. 摘要在擴散方程對股價運行描述的基礎上，用蒙特卡羅方法得出未來某一時刻股價轉移概率密度的數值解。
Based on probability density approximation, a novel unsupervised feature ranking approach was proposed and could be applied to feature selection. 摘要依據概率密度逼近提出了一種新的無監督特徵排序，應用於特徵選擇降維。
Since it is the probability density, it must be single-valued. 因為它是幾率密度，因此必須是單值的。
We get a buildup of electronic probability density between the nuclei. 我們得到在兩個核間的電子幾率密度的堆積。
