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1.image classification Data is divided into train_data, val_data and test_data by data-driven algorithm. Different results are debugged with different hyperparameters on train, evaluated on verification set, and then applied to test with the best pe ...

11.4 JavaScript 11.41 variable 1. Grammar of declaring variables // 1. Declare before define var name; // There is no need to specify a type or variable when declaring a variable. name Any type is acceptable name= "egon"; ​ // 2. Declarations are immediately defined var age = 18; 2. Variable Naming Specification 1. It's composed o ...

Go's GC has been criticized since it was born, but after introducing the three-color marker of v1.5 and the mixed writing barrier of v1.8, the normal GC has been shortened to about 10us, and has become very excellent. It's amazing. Let's explore the principle of Go's GC. Principle of Tricolor Marking Let's first look at a picture, and we will p ...

Links to the original text: https://www.javadoop.com/post/AbstractQueuedSynchronizer When analyzing Java concurrent package java.util.concurrent source code, we need to understand AbstractQueued Synchronizer (abbreviated as AQS below), becau ...

1.1 Numpy Infrastructure NumPy array is a multidimensional array object called ndarray. It consists of two parts: (1) Actual data (2) Metadata describing these data # Multidimensional array ndarray import numpy as np ar = np.array([1,2,3,4,5,6,7]) print(ar) # Output arrays, note the format ...

First, what is this? This refers to the environment object on which the function is executed. That is to say, this of the function points to the execution environment of the calling function. function a(){ return this } console.log( a() === window) //true The function's this keyword behaves slightly differently in JavaScript, and there ar ...

1. The Concept and Function of Iterator The main purpose of iterator is to provide a unified and convenient access and traversal mechanism for collections in JS such as Array, Map, Set or some custom collections. It is actually an interface. Any data structure can be traversed by deploying the itera ...

Concurrent HashMap in Java 7 Concurrency Level: Parallel level, concurrency number, Segment number, default is 16, that is, Concurrent HashMap has 16 Segments, at this time, in theory can support up to 16 threads concurrently write, as long as their operations are distributed on different Segments. T ...

Links to the original text: https://dzone.com/articles/th... Authors: Ioan Tinca Translator: liumapp Want to know more about the evolution of Java producer-consumer issues? Let's take a look at this article. We'll deal with this problem with the old method and the new method respectively. The producer-consumer problem is a typical multi-process ...

Links: https://ac.nowcoder.com/acm/contest/160/D Source: Niuke.com Sequence of integers Time limit: C/C++ 2 seconds, 4 seconds for other languages Space limit: C/C++ 262144K, other languages 524288K 64bit IO Format: %lld Title Description Gives an integer sequence a1,a2,...,an of length n for m operations, which are divided into two categories. ...