[{"source":{"position":34,"lines":["2. 计算H1权重，$\\alpha=\\frac\\{1\\}\\{2\\}log\\frac\\{1-e\\}\\{e\\}=0.4236$"],"changePosition":null},"target":{"position":34,"lines":["2. 计算H1权重，$\\alpha=\\frac{1}{2}log\\frac{1-e}{e}=0.4236$"],"changePosition":null},"type":"CHANGE"},{"source":{"position":37,"lines":["$$\begin{gathered}w=\\frac\\{w_1\\}\\{z_1\\} exp(-\\alpha y G(x))\end{gathered}$$"],"changePosition":null},"target":{"position":37,"lines":["$$\begin{gathered}w=\\frac{w_1}{z_1} exp(-\\alpha y G(x))\end{gathered}$$"],"changePosition":null},"type":"CHANGE"},{"source":{"position":39,"lines":["其中z是归一化常数$z=2\\sqrt\\{e(1-e)\\}$"],"changePosition":null},"target":{"position":39,"lines":["其中z是归一化常数$z=2\\sqrt{e(1-e)}$"],"changePosition":null},"type":"CHANGE"},{"source":{"position":53,"lines":["$$\begin{gathered}e_2=\\frac\\{3\\}\\{14\\}\end{gathered}$$"],"changePosition":null},"target":{"position":53,"lines":["$$\begin{gathered}e_2=\\frac{3}{14}\end{gathered}$$"],"changePosition":null},"type":"CHANGE"},{"source":{"position":77,"lines":["$$\begin{gathered}Loss=\\sum exp(-y (F_\\{m-1\\} + \\alpha G(x))\end{gathered}$$"],"changePosition":null},"target":{"position":77,"lines":["$$\begin{gathered}Loss=\\sum exp(-y (F_{m-1} + \\alpha G(x))\end{gathered}$$"],"changePosition":null},"type":"CHANGE"},{"source":{"position":79,"lines":["因为$F_\\{m-1\\}$已知，化简公式；"],"changePosition":null},"target":{"position":79,"lines":["因为$F_{m-1}$已知，化简公式；"],"changePosition":null},"type":"CHANGE"},{"source":{"position":83,"lines":["其中 $w=exp(−y(F_\\{m−1\\}))$,这个就是每轮迭代的样本权重！依赖于前一轮的迭代重分配。"],"changePosition":null},"target":{"position":83,"lines":["其中 $w=exp(−y(F_{m−1}))$,这个就是每轮迭代的样本权重！依赖于前一轮的迭代重分配。"],"changePosition":null},"type":"CHANGE"}]