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L120C透射电镜操作流程
以连续上样为例：关filament，关Turbo pump —> 上样，（插一半，自动开Turbo，抽真空后，插入后半） —> 开Filament —> 开阀 —> R1 放屏幕 —> LM 低倍数 —> Search （Stage Add）—> 放大倍数 （SA2600X）—> Wobbler, 调整 Z-axis —> 关闭 Wobbler —> Set Alpha 确认 —> 关闭Set Alpha —> 高倍（...…
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Norm (partial)
Absolute-value norm$$| x| = |x|$$is a norm on the $\Bbb R^1$ vector spaces formed by the real or complex numbers. Any norm $p$ on a $\Bbb R^1$ is equivalent (norm-preserving isomorphism of vector spaces).Euclidean normOn the $\Bbb R^n$ Euclidean s...…
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cross entropy introduction
In the problem of logistic regression, MSE (Mean Squared Error) is not good enough to describe the loss of the training model. Cross entropy is an important concept in logistic regression, which comes from the information theory.The amount of info...…
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The configuration of multi-ssh keygens
I have two keygens, one for github no password login, while the other for the remote server login. When I have generated key as usual:$ssh-keygen -t rsaAsk me if overwrite the default keygen (of course not!).So I make a new keygen file named rsa2,...…
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lemonade configuration in remote
About the lemonadeYou can find lemonade here.github_lemonadeBecause, neovim depends on xclip to copy and pasta from the remote Server (e.g. The computers in remote which has a greater computation power), for which, the $DISPLAY is needed. So we ca...…
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更新日常
写在前面，强烈谴责一下一些名字非常特别的程序，导致需要用的时候，抓耳挠腮也想不起来软件名字，在这里做一下备份。也可作为软件推荐用。alacarte用于添加软件到 Ubuntu 软件库，供兼容 i3wm rofi。其中桌面文件的地址，一般系统桌面文件在 /usr/share/applications/而 alacarte 的桌面文件管理地址为 ~/.local/applicationsi3-get-window-criteria查看 windows 信息，供添加到 i3wm config 文...…
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Legendre Transform 勒让德变换
对于给定一个关于 $x, y$ 的函数式：$$f(x, y)$$求它的全微分，$$df(x, y) = \sum_{i=0}^{n}\frac{\partial f_i}{\partial x_i}dx_i + \sum_{i=0}^{n}\frac{\partial f_i}{\partial y_i}dy_i\tag{1}$$我们假设，存在 $g(x, y)$，其自变量 $u$ 存在有，$$u_i = \frac{\partial f_i}{\partial x_i}$$代入 $(1)...…
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From Logistic Regression to Multi-class Classification and Neural Networks
Back Propagation给定一个神经网络，我们想通过Back Propagation的方法来求解图中任意节点的误差值（ $\delta$ ）。图中，我将input unit定义为红色，并将output unit定义为绿色。这样很容易理解, input layer中只存在有 input unit，而输出层中也就只有绿色的 output unit。我们假设有，$$\delta = \frac{J}{z} \tag{1}$$其中 $J$ 为 cost function，而，$z$ 即为对...…
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为什么矩阵行、列空间维度相同
转自：stackexchange 论坛Proof. Suppose that $\lbrace v_1,v_2,\dots,v_k\rbrace$ is a basis for the column space of $A$. Then each column of $A$ can be expressed as a linear combination of these vectors; suppose that the $i$-th column $c_i$ is given by$$...…
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神经网络拓扑排序反向传播算法的代码实现
# by defining a dictionary, classfying the both inputs (keys) and outputs (values)from functools import reduceimport randomdef topologic(graph): ''' { node:[node1, node2, ..., node] x: [linear], k: [linear], b: [l...…