曼士先生的教育理论
【漫士】怎样才能学明白数学? ChineseEnglish漫士是一名清华大学在读博士生,研究人工智能和理论机器学习,同时也是科普视频创作者。在其分享中,包含了自身考试经历、对教育的反思、费曼的相关例子以及黄金圈理论: 作者考试经历:漫士初三数学考试时,遇到一道求两个抛物线中间阴影区域面积的题目。由于出题人阴影填充方式的问题,这道题并非常规的长乘宽计算,而是要计算抛物弓形面积。其他同学因不会便默认按平时练习的长乘宽来算,但漫士觉得题目有趣。他依据听说的微积分思想,将横坐标0 - 1分成N份,每份宽度为N分之一,用小矩形面积代替该部分面积,宽是N分之一,长是横坐标的平方,把整个面积表示成N个小矩形求和的形式。在计算过程中,由平方求和联想到正方形,进而想到小立方体体积、金字塔,最终联系到四棱锥体积公式(四棱锥体积是1/3底面积乘高,此处底面积为1×1,高为1...
IDM-IAS
...
网络层
功能 路由器的两个功能: 路由选择:定期与相邻的路由器交换信息,获取最新的网络拓扑,然后更新路由表,根据路由表确定分组到达目的的最优路线 分组转发:根据转发表选择合适的端口将分组转发出去 转发表是根据路由表得出来的,虽然不是一个东西,但是讨论的时候可以互相代替 网络层提供两种服务: 虚电路:两台计算机通信时先建立网络层连接即虚电路,通信分虚电路建立、数据传输、虚电路释放三阶段。建立时分配虚电路号,之后分组首部只需携带该编号。 工作原理: 数据传输前,主机 A 发 “呼叫请求” 分组给主机 B,主机 B 同意则发 “呼叫应答” 分组确认。 虚电路建立后,主机 A、B 相互传送数据分组。 传送结束,主机 A 发 “释放请求”...
电脑空白图标解决方案
新建txt文件,粘贴以下内容,更改后缀名为bat,双击运行 1234567891011@echo offtaskkill /f /im explorer.exeCD /d %userprofile%\AppData\LocalDEL IconCache.db /astart explorer.execho 操作完成
一键推送脚本
server.bat 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950@echo $off$:: 切换到项目路径cd /d D:\Users\tongz\Documents\GitHub\blog:: 检查管理员权限fltmc >nul 2>&1 || ( echo 正在请求管理员权限... powershell -Command "Start-Process cmd -ArgumentList '/c \"%~f0\"' -Verb RunAs" exit /b):menuclsecho.echo 请选择要执行的操作:echo.echo [1] hexo cleanecho [2] hexo generate echo [3] hexo serverecho [4] hexo deployecho [5] npm run...
Should we let students use ChatGPT?
Should we let students use ChatGPT? this past December I was sitting around a table having lunch with some English teachers when one of them started sharing how she had recently caught a student cheating on an essay using this new form of artificial intelligence called chat GPT she watched in astonishment and a bit of mild horror as this program constructed an entire essay for the student with a click of a button the initial reaction around the table was disbelief there’s no way that AI can...
How to talk like a native speaker
how to talk like a native speaker Translator: Phuong Cao Reviewer: Leonardo Silva My story starts in Moscow. I was 15 years old. My best friend and I, we were part of a group of Westerners, visiting the Soviet Union. This was in 1987, a few years before the fall of the communist regime. We were given an official tour guide who was assigned to us. And the tour would start in the morning, and we were checked in to our hotel rooms for the night. My friend said to me, ‘‘Let’s go outside and look...
How to motivate yourself to change your behavior
How to motivate yourself to change your behavior Transcriber: Leonardo Silva Reviewer: Denise RQ [Segment 1: Introduction to behavior change challenges] So, we all have some behavior that we would like to change about ourselves. And we certainly all want to help someone else change their behavior in a positive way. So, maybe it’s your kid, your spouse, your colleague. So I want to share some new research with you that I think reveals something really important about what gets people to...
I/O管理
5.1 I/O管理基础 I/O控制方式: 查询 中断 DMA:有四个寄存器 命令/状态寄存器(CR)。接收从 CPU 发来的 I/O 命令、有关控制信息,或设备的状态。 内存地址寄存器(MAR)。在输入时,它存放将数据从设备传送到内存的起始目标地址;在输出时,它存放由内存到设备的内存源地址。 数据寄存器(DR)。暂存从设备到内存或从内存到设备的数据。 数据计数器(DC)。存放本次要传送的字(节)数。 DMA传送数据过程:设备发送DMA请求,CPU向控制器发送指令,同时设置MAR和DC,然后把控制权交给控制器,控制器和内存直接交互,不需要CPU参与,数据传送完,控制器向CPU发送中断请求。只有传送的开始和结束需要CPU参与 通道:通道与 DMA 方式的区别是:DMA 方式需要 CPU 来控制传输的数据块大小、传输的内存位置,而通道方式中这些信息是由通道控制的。另外,每个DMA...