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数据库基础 整体架构图 模块详情 Mysql: https://blog.csdn.net/ThinkWon/article/details/104778621 Redis: https://blog.csdn.net/ThinkWon/article/details/103522351

Definition Service Mesh是一个可配置的、低时延的架构层应用，主要应用在微服务框架中，用来处理内部微服务的海量数据通信的一种主要基于应用层API编写的框架。整体可以参考下图： 我们从用户发起请求到请求被返回的流程对service mesh负责的各个功能和模块进行拆解。 Container Orchestration Framework 这是一个系统引擎，当外部请求进入到系统内部时，首先访问到整个Framework，这个Framework能够对微服务框架的所有功能模块进行全局和局部的配置以及管理，并在这个基础上提供不同粒度的功能，例如维护服务发现表，进行内部网负载均衡等。 Load Balancing 当有大量流量进入到系统内部时，该功能模块从tr...

Goroutine获取输出 通过chan获取到输出。 参考这个程序代码: https://github.com/Chengru-Song/algo_practice/blob/master/conc/conc.go func ConcPattern() { ch1 := make(chan int) ch2 := make(chan int) // var wg sync.WaitGroup // wg.Add(1) // wg.Wait() go func(ch chan int) { time.Sleep(time.Second * 1) ch <- 1 }(ch1) go func(ch chan int) { // defer wg.D...

Golang Map并发读写 直接并发读写 如果直接对map进行并发读写，那么会造成Panic或者error，如下所示： package main func main() { m := make(map[int]int) go func() { for { read := m[0] // sync read } }() go func() { for { m[0] = 1 // sync write } }() } 上面程序有问题 传统加锁读写 package main func main() { m := make(map[int]int) mc := sync.Mutex ...

item2vec Usage: item2vec learns item similarity. Motivation Item2item relations are important because different than the traditional user2item relations, it shows a more explicit user intent of purchasing. Therefore it has a higher click-through rate. Solution Skip Gram Skip-gram is used to predict context words given a target word. For...

WMAPE Advantage: The advantage of this metric over MAPE is that this overcomes the ‘infinite error’ issue. Key word: Evaluation Usage: A measure of prediction accuracy of a forecasting method. WMAPE: weighted mean absolute percentage error’ A measure of prediction accuracy of a forecasting method. \[\begin{equation} WMAPE = \frac{\sum^n_{t=1...

LSTM + CNN Introduction Solution Why sigmoid? Sigmoid function is 0 - 1 layout, it could be used to remember or forget something. Why tanh We want to avoid vanishing gradient problem. The second derivative of tanh is mo