最近动态

#PiCar整理

下位机 Arduino 程序源码:https://github....
Arduino 负责通过 L298N 控制小车电机和 PWM 调速,以及控制摄像头云台的两个舵机。
Arduino 与上位机(树莓派)通过 USB 串口通信,通信协议详见下位机程序注释。

上位机树莓派程序源码:https://github....
上位机程序采用 Python 语言的 Flask 框架开发,主要负责控制下位机,以及与客户端的网络通信。另外,上位机还负责前车灯(两个大功率 LED)的控制。
与客户端的通信协议采用 HTTP,设计了若干个...
RAFT 选举算法
hash slot
人是很容易被环境影响的
本科生学习科研的方法,研究生实施科研的方法,博士生提出科研问题
教练:Coach —— 马夫,不是决定前进的方向,而是全力支持学生选择的方向
And one day he will finally meet someone who can light up all the stars in his universe.
Wait calmly and be well prepared.
You will get what you want.
Spend your time wisely.
Believe in myself.
#面试问题小结 (菜不成声
列举一些使用过的预训练模型的大小?
Word2Vec 如何训练?输入是什么?输出是什么?
分类问题常用的 Loss function 是什么?
交叉熵的含义?值域?
LSTM GRU 的比较?各自的应用场景?
LSTM 中梯度消失问题产生的原因?那么在多层神经网络中有没有梯度消失问题?
在计算和分析 LSTM 反向传播的时候,一般需要展开多少次?
batch size 1 和取最大(等于训练数据集大小)时分别代表什么?理论上什么时候收敛最快?为何实际并不能那样做?
相比于其他神经网络,RNN在算法设计上有什么需要注意的地方?
Life is Strange. Such a nice game pwp

"We played hide and seek in waterfalls
We were younger, we were younger"
----Obstacles By Syd Matters
http://troglobi...
The purpose of many applications is, with a little logic sprinkled on top, to act on network packets entering an interface, timeouts expiring, mouse clicks, or other types of events. Such applications are often very well suited to use an event loop.

给 Debian 配置 SSH chroot jail

今天由于某些原因,从群友那里听到了使用 chroot 配置 ssh jail 的做法,笔者使用的服务器 OS 是 Debian,在配置过程中踩到了一个小坑,因此在这里记录下来以备后人查阅。 什么是 chroot 在 wiki 上 有关于 chroot 的详细介绍。简单来说,chroot 是一个为特定进程或进程组改变其执行环境的根目录的机制,可以被视作为一种安全隔离机制。OpenSSH 在 4.8p1 版本之后添加了对 ChrootDirectory 配置项的支持,因此我们可以方便地配置某些 SSH 用户,让其工作环境被隔离在某个 chroot 下,就像被锁在 jail…

20181103 NEUOJ 维护日志

配置 judgehost 为 systemd 的 service,使用 syslog 管理相关日志,抛弃 supervisor domjudge judgehost 5.1.1 存在内存泄漏问题,配置 timer 来周期性 restart 它们 原本 judgehost 的日志时间非常混乱,更改 /etc/php.ini 中 Date 的时区后问题解决 更改 /etc/systemd/journald 使系统日志可持久化 配置 timer 来每天进行 certbot 的证书续期 webserver 的磁盘可用空间不足,经检查是 /tmp 下面有类似 systemd-private…

2018 ACM-ICPC 沈阳站现场赛环境配置记录

这里是 NEU_Bittersweet,2018年 ICPC 沈阳站现场赛的技术负责人之一。 今年的现场赛尝试性地使用了 Ubuntu 18.04 和 domjudge,尽可能地向 World Final 看齐,虽然踩了一些坑、也有一些小遗憾,但是总体上来说给选手们的体验还是不错的w 感谢和我一起肝环境配置的黑猫、yuki、念、WYJ、大腿、海之树等技术组的同学们,感谢萌萌哒出题人 qls、tls和 cls 给我们带来的精彩题目,感谢刘老师提供的千兆交换机,感谢现场的工作人员和志愿者们(志愿者真是太棒啦!正赛那一天比赛结束后,选手不用离场,志愿者们花了不到 5min…

二刷 POI 纪念
「朱唇缀笑靥 夏雨映红妆」
咻卡咻生快~~
The password "Dashwood" is a reference to the protagonist of Jane Austen's "Sense and Sensibility" and it serves as a parallel between the novel's conflict between sense (logic, propriety, and thoughtfulness) and sensibility (emotion, passion, unthinking action) and Harold's internal conflict between letting the ASI's "live" (sense) or letting Humanity...
I'll grow old with her, Mr. Reese, just from afar. And beyond that, it's best not to think about it.
--Person of Interest S02E18
Take my heart when you go.
Take mine in its place.
---- WestWorld S02E08
In that dream you had everything and it was so real to you. So are you gonna work hard to make it true or not?
【Agent of S.H.I.E.L.D】 Letting go is never about moving on. It's about locking it up in a place and visiting it from time to time.
I should leave.
I can't make you happy.
You are much happier within your circles.
I should run away...
So stupid I am to send meaningless stickers to a fading tg account...
Nothing will change, will they?
It's like someone else is draining faith out of me. Now I'm feeling hopeless, helpless, filled with loneliness.
I can't hold on to it. It seems like I'm not able to hold on to anything. I'm losing things around me.
And I'm wondering whether I'm even losing myself....