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Hace 12 horas · Idealism in philosophy, also known as philosophical idealism or metaphysical idealism, is the set of metaphysical perspectives asserting that, most fundamentally, reality is equivalent to mind, spirit, or consciousness; that reality is entirely a mental construct; or that ideas are the highest type of reality or have the greatest claim to being considered "real".
Hace 12 horas · A–D部分见：霍金《时间简史 A Brief History of Time》书后索引（A–D） 图源：Wikipedia INDEX E Earth: circumference, motion, shape Eclipses Eddington, Arthur Einstein, Albert: biography, see also Relativity; Special…
Hace 12 horas · Eddington, Arthur Einstein, Albert: biography, see also Relativity; Special relativity; Energy equation Einstein-Rosen bridge Elasticity Electric charge Electrical force Electromagnetic field Electromagnetic force Electromagnetic waves Electron Electroweak unification theory
Hace 12 horas · 1.DataFrame介绍 DataFrame 是一个【表格型】的数据结构，可以看作是【由Series组成的字典】（共用同一个索引）。DataFrame 由按一定顺序排列的多列数据组成。设计初衷是将 Series 的使用场景从一维扩展到多维。DataFrame 既有行索引，也有列索引。 行索引：index 列索引：columns 值：values（NumPy的二维数组） 2
Hace 12 horas · Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transaction (ie, buy one and sell one share of the stock),
