desertification china of
深入了解JS中for...in和for...of的区别
for...in 的特点 for...in 循环返回的值都是数据结构的 键值名(即下标)。 遍历对象返回的对象的 key 值,遍历数组返回的数组的下标(key)。 for...in 循环不仅可以遍历数字键名,还会遍历原型上的值和手动添加的其他键。 特别情况下, for...in 循环会以看起来任意的 ......
XXII Open Cup named after E.V. Pankratiev, Grand Prix of IMO
Contest link: XXII Open Cup named after E.V. Pankratiev, Grand Prix of IMO。 M. Math 题意:给你一个长度为 \(n\) 的数组 \(a\),求有多少对 \((i,j)\) 满足 \(a_i^2+a_j\) 是完全平方数 ......
Reference and inspiration from China's strategy for addressing water pollution issues in Africa
According to China's three line one permit measures, we believe that this has a certain reference value for water pollution issues in Africa. The "thr ......
什么是云计算领域的 TCO - Total Cost of Ownership
TCO,全称为 " Total Cost of Ownership ",在中文中常译为 " 总拥有成本 "。在云计算领域,TCO 是一个极为重要的概念,它包括了从采购、部署、运维到退役整个生命周期内的所有成本。这包括硬件、软件的购买、安装、维护、升级、人工、能源、设施等成本,以及可能的额外成本,比如 ......
Dark Side Of The Moon Is More Luminous
Day -???? (2022/11/26) 一切都结束了 Day -??? (2023/4/1) 我做了一个一模一样的梦 Day -?? (2023/7/26) 我至少有一个月不会再做梦了 Day -? (2023/9/29) 我又开始仰望月亮了 Day -3 (2023/11/15) 我跌入了水 ......
[LeetCode] 2563. Count the Number of Fair Pairs
Given a 0-indexed integer array nums of size n and two integers lower and upper, return the number of fair pairs. A pair (i, j) is fair if: 0 <= i < j ......
Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file
转: https://blog.csdn.net/qq_26898033/article/details/128915500 1 错误信息 org/ springframework /boot / maven/BuildInfoMojo hasbeen copiled by a more recen ......
uniapp开发[Vue warn]: Unhandled error during execution of scheduler flush. This is likely a Vue internals bug.
如下,uniapp开发nvue页面报如下警告: 15:30:25.079 [Vue warn]: Unhandled error during execution of render function at <UniGroupclass="w710 cell_group bg_white borde ......
vue : 三种解决方法:Cannot deserialize value of type `java.util.Date` from String
一、改前端 加入格式化: value-format="yyyy-MM-dd HH:mm:ss" <el-date-picker v-model="formValidate.pastDueTime" value-format="yyyy-MM-dd HH:mm:ss" type="datetime" ......
The 2021 ICPC Asia Nanjing Regional Contest (XXII Open Cup, Grand Prix of Nanjing)
Preface 来场我最爱的SUA的题,而且恰逢南京站因此袋鼠题懂得都懂 然而好家伙点开题目一看怎么全是OP题,我们队没一个玩原的这下大输特输了 因此这场前中期可以说是崩完了,一个签到因为没判\(n=1\)从20min挂到150min,除此之外其它题目基本上都要挂上三四发 不过好在最后20min连着 ......
AtCoder Regular Contest 144 E GCD of Path Weights
洛谷传送门 AtCoder 传送门 喵喵题。 考虑若所有点权都已确定,如何求 \(1\) 到 \(n\) 所有路径权值和的 \(\gcd\)。 考虑如何 check 一个 \(x\) 是否合法。\(x\) 合法的充要条件是,把不能从 \(1\) 到达的点和不能到达 \(n\) 的点扔掉后,存在一组 ......
Transferability of the Chinese Eco-environmental Protection Measure
The United States faces multiple air pollution problems, some of which mainly include:1. Carbon dioxide emissions The United States is one of the larg ......
[951] Understanding the pattern of "(.*?)" in Python's re package
In Python's regular expressions, (.*?) is a capturing group with a non-greedy quantifier. Let's break down the components: ( and ): Parentheses are us ......
[949] Using re to extract unstructured tables of PDF files
Here is the problem, this unstructured table of a PDF file can not be extrcted as a table directly. We can only extract the whole texts of every page. ......
On Manipulating Signals of User-Item Graph A Jacobi Polynomial-based Graph Collaborative Filtering
[TOC] Guo J., Du L, Chen X., Ma X., Fu Q., Han S., Zhang D. and Zhang Y. On manipulating signals of user-item graph: A jacobi polynomial-based graph c ......
The United States adopts China's air pollution control measures
China has accumulated rich experience in air pollution control. When the United States faced a serious air pollution problem, it began to learn from C ......
jmeter beanshell常见问题:"BeanShellInterpreter: Error invoking bsh method: eval In file: inline evaluation of....
jmeter使用beanshell文件经常会遇到这个问题:BeanShellInterpreter: Error invoking bsh method: eval In file: inline evaluation of.... 原因可能有: 1.jar包没有放入对应位置 解决:放到lib/ex ......
The Redemption of the Moon
ZJOI2022 树 考虑一下容斥,钦定若干个节点满足要么都为叶子,要么只有一遍是叶子,另一边无所谓。 记 \(dp_{i,j,k}\) 表示前 \(i\) 个节点, \(T_1\) 中有 \(j\) 个 \(1\to i-1\) 的节点不是叶子,\(T_2\) 中有 \(k\) 个 \(i+1\t ......
ARC144E GCD of Path Weights
Description 给定 \(n\) 个点,\(m\) 条边的有向图,图中的任意一条有向边满足 边起点的编号小于边终点的编号。每个点有点权,但其中有些点的点权未知。 你需要找到一种给未知点权值的方案,使得 所有 \(1\to n\) 的路径点权和的最大公因数最大,或者告知答案可以无限大。输出这个 ......
什么是计算机科学和数据管理领域的 source of truth
"Source of Truth"(真实源)在计算机科学和数据管理领域中,是一个非常重要的概念。简单来说,"Source of Truth" 是指在一个系统或者应用中,为了确保数据的一致性和准确性,设置的一个权威性的数据来源或数据存储位置。 在一个系统里,可能会有很多不同的数据源,这些数据源可能会有 ......
初中英语优秀范文100篇-003 My ways of learning English
记忆树 1 As we all know, English is one of the most important languages in the world. 翻译 众所周知,英语是世界上最重要的语言之一 简化记忆 最重要的语言 句子结构 "as we all know"是一个引导从句的短语, ......
BGP GR,EOR(end of rib)
通常当BGP会话重启时,所有BGP对等体检测到该会话失效,然后再正常。该“down/up”转换导致路由振动以及BGP路由的重计算,并且会让路由器产生更新与撤消消息。这样的振动可能会产生暂时的转发黑洞或暂时的转发环路。同样在路由器控制层面上会浪费大量的资源。如此这样的问题还会传递到整个网络。 定义的一 ......
The Application of River Chief System on Water Pollution in Britain
Water pollution is a global concern that affects the health and well-being of both humans and ecosystems. In Britain, despite efforts to address this ......
Transferability of the Chinese Eco-environmental Protection Measure
London Convention and London ProtocolThe London Convention and London Protocol establish the global rules and standards for preventing, reducing, and ......
[945] Replacing a string in all cells of a Pandas DataFrame
To replace a string in all cells of a Pandas DataFrame, we can use the str.replace() method, which allows us to perform string replacements on each el ......
"Cannot read property 'length' of undefined"报错处理
数据绑定在刚开始只是和内存建立联系,并没有真正的和后台的数据挂上钩,所以一开始的res.data只是一个空值,必须在之前加个if判断,确保有值以后再开始计算length。 if(res.data){ this.num = res.data.length; } 这样就不会在控制台显示报错了。 ......
Chain-Of-Note:解决噪声数据、不相关文档和域外场景来改进RAG的表现
CoN要点 CoN框架由三种不同的类型组成,研究称之为阅读笔记。 上面的图像,类型(A)显示了检索到的数据或文档回答查询的位置。LLM仅使用NLG从提供的数据中格式化答案。 https://avoid.overfit.cn/post/1a108bbaf6c84b5fbc51554fefa222cd ......
Local Policies in China and Light Pollution in Singapore
Our measures to combat light pollution can be described as drastic. The main causes of light pollution can be categorized as light-emitting diodes and ......
Transferability of the Chinese Ocean Trash Protection Measure
PROBLEMS Researchers at The University of Western Australia have found that although the Indian Ocean is the world's biggest dumping ground for plasti ......