Tag：probability

Time：202212
introduction Today, I suddenly saw the term “information entropy” when I was browsing the paper. I remembered it with a snap. Soon!! Isn’t this the first professional term I talked about in the first introduction to information resource management in my freshman year? I’m familiar with information entropy. I’ll come soon. Information entropy is negative […]

Time：20211230
//App status The second scheme is the method of generating a new weight value array /** Reference link Java controls the probability of random numbers This work adoptsCC agreement, reprint must indicate the author and the link to this article

Time：20211230
0x01 basic concept of value iteration algorithm 0x01. 1 reward To realize the value iteration, first define the value. In the maze task, you will be rewarded for reaching the goal. The reward RT given at a specific time t is called immediate reward The sum of future rewards GT is called the total reward […]

Time：20211224
Original link:http://tecdat.cn/?p=21825 = The basic principle of hypothesis testing is the principle of small probability, that is, we believe that small probability events can not actually occur in a test. = Multiple comparison problem When multiple hypothesis tests are conducted under the same research problem, it no longer conforms to the “one test” of the […]

Time：20211219
If you want to deeply understand artificial intelligence, big data algorithms. Probability theory must be understood. Today’s hottest technology is nothing more than machine learning. Deep learning, big data feeding. Internet manufacturers feed through massive data. You can know the behavior characteristics of each user. Predict what users will do tomorrow. Ma Yun has repeatedly […]

Time：20211217
Welcome to pay attention to the personal public name and the Utopia in your heart – learn some new knowledge every day and meet better yourself. There are choices everywhere in life, ranging from what to eat for dinner to where to settle down and what career to engage in We have all heard such […]

Time：2021128
Ladies and fagsToday, let’s talk about canvas animation.Where did you start? What impressed me most in my childhood was the matrix (don’t ask me how old I am!First onelink, you can read Daniel. You can close this page. When you go out and turn right, you are Gan Qi’s steamed stuffed bun. First of all, […]

Time：20211129
Exercise 10.1 By the question,\(T=4, N=3,M=2\) According to algorithm 10.3 The first step is to calculate the final period\(\beta\) ： \(\beta_4(1) = 1, \beta_4(2) = 1, \beta_4(3) = 1\) The second step is to calculate each intermediate period\(\beta\) ： \(\beta_3(1) = a_{11}b_1(o_4)\beta_4(1) + a_{12}b_2(o_4)\beta_4(2) + a_{13}b_3(o_4)\beta_4(3) = 0.46\) \(\beta_3(2) = a_{21}b_1(o_4)\beta_4(1) + a_{22}b_2(o_4)\beta_4(2) + a_{23}b_3(o_4)\beta_4(3) […]

Time：20211124
Original link:http://tecdat.cn/?p=22302 Mixed effect logistic regression is used to model binary outcome variables, in which when the data are grouped or there are fixed and random effects at the same time, the logarithmic probability of the result is modeled as a linear combination of predictive variables. Examples of mixed effect logistic regression Example 1:A researcher […]

Time：20211122
Under some distribution assumptions, some machine learning models are designed to work best. Therefore, knowing which distribution we are using can help us determine which models are best suited for use. introduce Having a good statistical background may be of great benefit to the daily life of data scientists. Every time we start exploring a […]

Time：20211119
Significance of collecting statistical informationIn an SQL database, the implementation of the optimizer has a decisive impact on the performance. The difference in execution time between an unoptimized execution plan and a fully optimized execution plan is often thousands of times. For an SQL optimizer, statistical information is an essential condition. Only by relying on […]

Time：20211110
Original link:http://tecdat.cn/?p=5318 In this article, I will introduce the installation and basic usage of LDA Python package for late Dirichlet allocation (LDA). I will not introduce the theoretical basis of this method in this article. The main idea of assigning documents in corpus (document set) to potential (hidden) topics based on word vectors is quite […]