(1)Question 1 complete idea and Python implementation code download
(2)Question 2: complete idea and Python implementation code download
Question 1: Based on question 2 of the preliminary round, if you need to accurately predict the transaction cycle of vehicles, what method will you adopt for modeling? Please use ...
Added by crishna369 on Mon, 07 Mar 2022 21:02:34 +0200
Holding fireworks to make a living, poetic to seek love
1. Principle introduction
2. Detailed steps
2.1 data acquisition
2.2 data center (Standardization)
2.3 finding covariance matrix
2.4 calculate eigenvalues and eigenvectors of covariance matrix
2.5 determining the number of principal components
2.6 calculation of princi ...
Added by TheUnknown on Sun, 06 Mar 2022 08:15:28 +0200
2. Detailed explanation of algorithm
2.1 data standardization
2.2} calculate the grey correlation coefficient
2.3 calculation of grey correlation coefficient
3. Case analysis
3.1 reading data
3.2 data standardization
3.3} draw the broken line diagram of x1, x4, X5, X6 and X7
3.4 grey correlation coefficient
Added by christh on Thu, 24 Feb 2022 15:56:49 +0200
1. Simulated annealing algorithm
Simulated annealing algorithm draws lessons from the idea of statistical physics. It is a simple and general heuristic optimization algorithm, and has probabilistic global optimization performance in theory. Therefore, it has been widely used in scientific research and engineering. Annealing is a process in whi ...
Added by AcidDriver on Fri, 18 Feb 2022 13:42:26 +0200
Air return problem of school bus transportation
Record the code solution of problem A in the mathematical modeling competition of "University of Technology Press" in 2021
Every day, some teachers and staff of a school take a bus from the old campus to the new campus to work. After work, most people will return. The ...
Added by meanrat on Fri, 18 Feb 2022 07:54:51 +0200
1. Classification of classification
Classification of classification? Yes, there are different kinds of classification, and it is often confused in the fields of mathematical modeling and machine learning.
First of all, let's talk about Supervised learning and Unsupervised learning. Does it mean that there are no teachers and Discipline Inspe ...
Added by semlabs on Fri, 11 Feb 2022 09:33:14 +0200
Basic concepts of decision tree
Decision tree is a tree.
The leaf node corresponds to the decision result, and each other node corresponds to an attribute test;The sample set contained in each node is divided into sub nodes according to the results of attribute test;The root node contains the complete set of samples, and the path from the roo ...
Added by catlover on Thu, 10 Feb 2022 12:46:58 +0200
1. Basic definitions
2. Algorithm principle
2.1 advantages and disadvantages of the algorithm
2.2 algorithm parameters
3. Distance formula in the algorithm
4. Case realization
4.1 reading data
4.2 separate training set and test set
4.4 calculating Euclidean distance
4.5 # sorting and outputti ...
Added by rach123 on Wed, 02 Feb 2022 15:13:25 +0200
Blanking of cans
Problem: a company uses a set of stamping equipment to produce a can for canned drinks, which is stamped with tinplate The can is cylindrical, including the can body, upper cover and lower bottom. The height of the can is 10 cm, and the diameters of the upper cover and lower bottom are 5 cm The company uses two different speci ...
2021 may day cup mathematical modeling problem A
Vaccine production issues
The novel coronavirus pneumonia has been a worldwide disaster and has brought serious disasters to the world. Countries have developed new vaccines to control the epidemic. It is assumed that vaccine production needs to go through four process flows: CJ1 station, CJ2 s ...
Added by Lagreca on Thu, 23 Dec 2021 23:49:47 +0200