D3 https://d3js.org/ 数据驱动文档显示, 利用 SVG HTML CSS技术. D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS. D3’s emphasis on web standards gives you the full capabilities of mode…

rt-thread learning notes 2018-01-15 > 001 具有相同优先级的线程,每个线程的时间片大小都可以在初始化或创建该线程时指定 rt_thread_t rt_thread_create(const char *name, void (*entry)(void *parameter), void *parameter, rt_uint32_t stack_size, rt_uint8_t priority, rt_uint32_t tick) 2018-01-16…

Mybatis Learning Notes 主要的参考是博客园竹山一叶的Blog,这里记录的是自己补充的内容 实体类属性名和数据库不一致的处理 如果是实体类的结果和真正的数据库的column的名称不对应, 需要做一个映射(后面有从数据库映射到实体类的库), 可以直接在sql语句中自己加, 也可以自己在mapper中定义一个对应别名. 基于xml配置和基于注解的两种方式: xml方式: 建表语句: CREATE TABLE orders( order_id INT PRIMARY KEY AUT…

Rust learning notes Rust Version 1.42.0 $ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh version $ rustc -V rustc 1.42.0 (b8cedc004 2020-03-09) $ rustc --version rustc 1.42.0 (b8cedc004 2020-03-09) $ rustc -h Usage: rustc [OPTIONS] IN…

  Basic theory (i) Supervised learning (parametric/non-parametric algorithms, support vector machines, kernels, neural networks, )  regression, classification. (ii) Unsupervised learning (clustering, dimensionality reduction, recommender systems, dee…

1. 概述条件随机场(Conditional Random Field, CRF)是概率图模型(Probabilistic Graphical Model)与区分性分类( Discriminative Classification)的一种接合,能够用来对“结构预测”(structured prediction,e.g. 序列标注)问题进行建模. 如图1,论文 [1] 阐释了 CRF 与其他模型之间的关系. 图1. CRF 与 其他机器学习模型对比[src] 本文我们重点关注输入结点独立的“线性链…

Sams Teach Yourself SQL in 10 Minutes…

1)  cgo $go install test.go # command-line-arguments /usr/bin/ld: unrecognized option '--build-id=none' /usr/bin/ld: use the --help option for usage information collect2: ld returned 1 exit status https://github.com/golang/go/issues/9520…

Basic Knowlege points: 1: it's necessary that there is only one public class in per .java file 2: .java file name should better to same as class name 3: when set the environment variable CLASSPATH, you should make sure the '.' path can't be lack of.…

The first time I came across django was last month.. Since then I was considering it as the better choice of building/maintaining websites. Now I think it is its auto-gen sql and commitments of changes makes it convienient of making changes. Only 3 s…