不同的λ(0,1,10,100)值对regularization的影响\ 预测新的值和计算模型的精度 %% ============= Part 2: Regularization and Accuracies =============% Optional Exercise:% In this part, you will get to try different values of lambda and % see how regularization affects the decisio…
#include <bits/stdc++.h> using namespace std; const int MAXN = 100; const int X = 3; long long f[1005]; void init() { f[0] = 1; for(int i = 1;i < MAXN; i++) { f[i] = f[i-1]*X; } } int hash(string num) { int ans = 0; for (int i = 0; i < num.len…
与LED串联的电阻被用于控制该LED导通时的电流量.为了计算电阻值,你需要知道输入电源电压(Vs,一般为5V),LED的正向电压(Vf)和你需要流过LED的电源(/)的数值. 其电阻欧姆值的计算公式(称为欧姆定律)为: R = (Vs - Vf) / I 例如,用5V的输入电源电压和15mA电流来驱动正向电压为1.8V的LED会使用以下值: Vs = 5V(5V Arduino板), Vf = 1.8V(LED的正向电压), I = 0.015A(1毫安[mA]是千分之一安培[A],所以15mA…
总结:谢谢陈勇老师.很棒的指导.超有爱. 总是不思考++++如内存的分析.堆和栈.堆内存里对象,字符串,栈里基本数据类型 来龙去脉,属性方法的调用,都不是很理解.... package com.c2; import java.util.Scanner; //1+1/2+1/3+....+1/n的值 public class Dream { public static void main(String[] args) { Scanner c = new Scanner(System.in); Sy…
直接上代码吧: import cv2 import numpy as np from PIL import Image area = def getWhitePixel(img): global area image=cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) blur = cv2.GaussianBlur(image,(,),) ret3,th3 = cv2.threshold(blur,,,cv2.THRESH_BINARY+cv2.THRESH_OTSU)…
def voc_ap(rec, prec, use_07_metric=False): """ ap = voc_ap(rec, prec, [use_07_metric]) Compute VOC AP given precision and recall. If use_07_metric is true, uses the VOC 07 11 point method (default:False). """ if use_07_metri…
代码 Typescript版 /** * TimeSpan just like the class TimpSpan in C# ,represent the time difference * @class TimeSpan */ class TimeSpan { constructor(millionseconds: number) { this.totalMillionseconds = millionseconds; this.totalSeconds = millionseconds…
