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preface I've been reading Dr. Li Hang's "statistical learning methods" recently. I'll make a small record here and write down my understanding. I welcome your criticism and correction. text Intuitive understanding of perceptron Perceptron should be the simplest algorithm among machine learning algorithms. Its principle can be seen i ...

java written test handwriting algorithm interview questions with answers 1. Count the number of words in an English article. public class WordCounting { public static void main(String[] args) { try(FileReader fr = new FileReader("a.txt")) { int counter = 0; boolean state = false; int currentChar; while((currentChar= fr.read()) != -1) { if(cur ...

Examples Take the following linear programming as an example 2 x 1 + 3 x 2 − ...

Learning video source: link. Course summary Question: how to find the optimal value of weight As shown in the following figure, assuming that the initial value of W is the position of the red dot, how can we update w to approach the minimum value of the loss function The update algorithm is: Algorithm explanation: when the partial derivativ ...

Sorting algorithm Enter an integer array and output the sorted array. Here, take "no descending sorting" as an example. I sorted out the information for follow-up search. Beginners may have mistakes. I hope you don't mind and can point it out. Bubble sorting Principle: search from the array header in turn, and exchange position ...

What is hash Hash is used to map a large range of numbers (such as [10 ^ - 9, 109]) to a smaller interval. For example, for 109, we want it to be mapped to the interval [0, 105] (which can also be understood as an array). We can directly remainder 109 (10 ^ 9% 10 ^ 5), and then determine the falling point of the number in the interval accordin ...

k-means algorithm Partition based method Given a data set D with N data objects and the number of clusters to be generated K (k < n), in the partition method D, the objects are allocated to K groups, and each group represents a cluster. Then an objective function is used to evaluate the partition quality, so that the objects in the cluster ...

[final examination of data structure experiment] - delete the first largest element and its duplicate node in the single linked list subject Known single linked list A, write an algorithm to delete the first largest element in the single linked list.Given the single linked list L, write an algorithm to delete its duplicate nodes (only one is ...

Java circular linked list Give you a head node of the linked list to judge whether there are links in the linked list.Returns true if there are links in the linked list. Otherwise, false is returned. LeetCode's friends use the fast and slow double pointer writing method to judge... I don't think it's necessary. It's a little inefficient Let's ...

Blue Bridge Cup practice 008 Interview question 01.06 String compression String compression. Using the number of character repetitions, write a method to realize the basic string compression function. For example, the string aabcccccaaa becomes a2b1c5a3. If the "compressed" string is not shorter, the original string is returned. You ...