objectives you for and
Lecture 2 Shell Tools and Scripting
Lecture 2 Shell Tools and Scripting homework: 1.Read man ls and write an ls command that lists files in the following manner 读取 man ls 并编写按以下方式列出文件的 l ......
2_7 Object Abstraction
2_7 Object Abstraction The object system allows programmers to build and use abstract data representations efficiently. It is also designed to allow m ......
2_9 Recursive Objects
2_9 Recursive Objects Objects can have other objects as attribute values. When an object of some class has an attribute value of that same class, it i ......
2_5 Object-Oriented Programming
2_5 Object-Oriented Programming Object-oriented programming (OOP) is a method for organizing programs that brings together many of the ideas introduce ......
3_5 Interpreters for Languages with Abstraction
3_5 Interpreters for Languages with Abstraction The Calculator language provides a means of combination through nested call expressions. However, ther ......
CF1100F Ivan and Burgers
CF1100F Ivan and Burgers Problem 给定一个长为 \(n\) 的序列,\(Q\) 查询区间异或最大值。 \(1 \le n, Q \le 5 \times 10^{5}\)。 Solution 1 幸运数字的序列版本,但数据范围更大了,三只老哥很难冲得过去。 思考线段树 ......
Solution 2.3 -《Sets, Functions, and Logic》
2.3 a) (a) $$ (\exists x \in \mathbb{N}) (x^3=27)$$ (b) $$ (\exists p \in \mathbb{N}) (p > 1,000,000) $$ (c) $$ \exists((p \in \mathbb{N})\wedge (1<p< ......
Solution 1.1-《Sets, Functions, and Logic》
(1) (a). \(0<\pi<10\) (b). \(3<4\) (c). \(-3<e<3\) (d). \(\pi>0\) (e). \(\pi\neq0\) (2) (a). T (b). T (c). T (d). F (e). F (f). F (g). T (h). T (i). T ......
Solution 1.2 -《Sets, Functions, and Logic》
(1) (a) 34159 is not a prime number. (b) Not all roses are red or not all vialets are blue. (c) If there are no hamburgers, I'll not have a hot dog. ( ......
Educational Codeforces Round 160 (Rated for Div. 2)
A 直接模拟,注意细节 #include<bits/stdc++.h> #define ll long long using namespace std; ll p[15] = {1}; void solve() { ll x; cin >> x; int len = 0; while(x / p[ ......
编辑文件后保存报错E212: Can't open file for writing
报错如下图: 1、编辑的时候是 root 用户,但还是有报错,退出文件查看该文件是否上了 i 锁: lsattr $文件名 查看输出显示未上 i 锁,若是上了 i 锁则会在红线上显示一个 i,有 i 锁的情况下需要执行解锁: chattr -i $文件名 2、编辑时候使用的是root用户,所以不用查 ......
【tensorboard】No dashboards are active for the current data set.
这个问题找了很久,不管是相对路径,绝对路径都是无数据集,但是日志文件里面有文件。 【敲】【重】【点】: 版本更新前是 tensorboard --logdir ="D:\Users\Administrator\PycharmProjects\Test\TTest\logs" 而更新后将=改为空格 t ......
v-for 为什么要加 key,key的作用是什么
v-for 为什么要加 key: 1. vue中列表循环需加:key="唯一标识" 唯一标识尽量是item里面id等,因为vue组件高度复用增加Key可以标识组件的唯一性,为了更好地区别各个组件 key的作用主要是为了高效的更新虚拟DOM 2.标签名一样,key一样这时候就会就地复用,如果标签名不一 ......
Educational Codeforces Round 151 (Rated for Div. 2)补题A~D
Educational Codeforces Round 151 (Rated for Div. 2) A. Forbidden Integer 思路 分别处理x=1和x≠1的情况 ac代码 #include <bits/stdc++.h> using namespace std; using i6 ......
CF763E Timofey and our friends animals题解
题目链接:CF 或者 洛谷 简单来说就是求 \([l,r]\) 这些点都存在的情况下,连通块的数量,看到七秒时限,而且每个点相连的边数很少,可以想到离线下来使用莫队类的算法解决 连通块问题,一般可以考虑使用并查集解决。对于并查集来说,它的增加是非常简单的,但删除是困难的,可持久化并查集时空常数都较大 ......
神经网络优化篇:详解神经网络的权重初始化(Weight Initialization for Deep NetworksVanishing / Exploding gradients)
神经网络的权重初始化 这是一个神经单元初始化地例子,然后再演变到整个深度网络。 来看看只有一个神经元的情况,然后才是深度网络。 单个神经元可能有4个输入特征,从\(x_{1}\)到\(x_{4}\),经过\(a=g(z)\)处理,最终得到\(\hat{y}\),稍后讲深度网络时,这些输入表示为\(a ......
python 报错TypeError: object of type ‘NoneType‘ has no len()处理
python 报错TypeError: object of type ‘NoneType‘ has no len()处理1. 引言在编程过程中,我们经常会遇到各种异常情况。其中之一就是TypeError异常,它表示操作或函数应用于了错误的数据类型。在本文中,我们将重点讨论TypeError异常中的一 ......
CF1545C AquaMoon and Permutations 题解
题目链接 点击打开链接 题目解法 很不错的题 首先题目保证了一定有解,所以不用考虑奇怪的无解情况 从列中的数字种类入手 如果一列中有数字 \(c\) 恰好只有第 \(x\) 行存在,那么第 \(x\) 行一定在答案序列中 考虑选了第 \(x\) 行会牵连一些行不能选,那么把这些行去掉,继续跑上面的操 ......
for 循环练习
1、添加10个用户user1-user10,密码为8位随机字符 [root@srehost scripts]#cat FOR_USER.sh #!/bin/bash for ((i=1;i<=10;i++));do useradd USER${i} PASSWORD=`cat /dev/urando ......
AMOS: Enabling Automatic Mapping for Tensor Computations On Spatial Accelerators with Hardware Abstraction
AMOS: Enabling Automatic Mapping for Tensor Computations On Spatial Accelerators with Hardware Abstraction Abstract 为了实现性能提升,硬件专用化是一个趋势。空间硬件加速器利用专门的层次 ......
SciTech-BigDataAIML-Tensorflow-Introduction to modules, layers, and models
Introduction to modules, layers, and models Model: To do machine learning in TensorFlow, you are likely to need to define, save, and restore a model. ......
《A Novel Table-to-Graph Generation Approach for Document-Level Joint Entity and Relation Extraction》阅读笔记
代码 原文地址 文档级关系抽取(DocRE)的目的是从文档中提取实体之间的关系,这对于知识图谱构建等应用非常重要。然而,现有的方法通常需要预先识别出文档中的实体及其提及,这与实际应用场景不一致。为了解决这个问题,本文提出了一种新颖的表格到图生成模型(TAG),它能够在文档级别上同时抽取实体和关系。T ......
SciTech-BigDataAIML-Tensorflow-Introduction to graphs and tf.function
Graphs are data structures that contain: a set of tf.Operation objects, which representing units of computation; and tf.Tensor objects, which represen ......
如何在无窗口模式下运行GPG——如何在命令行模式下使用gpg生成秘钥:How to make gpg prompt for passphrase on CLI——GPG prompt for password in command line
参考: Unable to generate a key with GnuPG (agent_genkey failed: No such file or directory) ["No such file or directory" when generating a gpg key](https ......
How To Remove the Oracle OLAP API Objects From 9i and 11g Databases (Doc ID 278111.1)
How to remove the Oracle OLAP API objects from a 9i database We can consider like olap api objects: -) objects in the schema of olapsys; -) public syn ......
SciTech-BigDataAIML-Tensorflow-Introduction to Gradients and Automatic Differentiation
In this guide, you will explore ways to compute gradients with TensorFlow, especially in eager execution. Automatic Differentiation and Gradients Auto ......
Objective-C(03)|继承和方法调用(初阶)
继续书接上文,这一块的语法对于用Java的人来说,就变得友好起来了。 当然完全一样不可能的,Java的对象成员运算符“.”以及this关键字,在OC中,是由消息表达式以及self关键字体现。 初始化方法 NSObject是OC的根类,其作用与Java中的Object相似。一个类的init方法实际上是 ......
'@' that cannot start any token. (Do not use @ for indentation)
1.问题 idea启动maven项目时,报以下错误 cannot start any token. (Do not use @ for indentation) 2.解决方法 右键项目中的pom.xml文件,找到Maven中的Reload project就可以了 ......
解决MySql: java.sql.SQLException: Incorrect string value: ‘\xF0\x9F\x8C\x9D\xF0\x9F...‘ for column
1、异常java.sql.SQLException: Incorrect string value: '\xF0\x9F\x8C\x9D\xF0\x9F...' for column '' at row 1 ; uncategorized12、解决方案2.1、针对字段修改编码格式数据库对应的字段编码 ......