introduction to business book

Basic idea: The data is divided into training set and test set, training model with training set data, test model with test set data. The Division of Training set and test set can be by the dimension of time, or by the dimension of the crowd. Risk: There may be biases for some methods.Using historical data to evaluate the data into training set test set and N-fold cross-validation according to Time dimension.There is also the direct use of human evaluation. However, the cost is larger, not on th

Train of thought: only 8 This number special, 3+5>4+4, other as long as except 5 take surplus can.I stole a lazy, directly listed if ...#include using namespacestd;voidMain () {intN; inti; cout"Please enter this number:"Endl; CIN>>N; I= n/5; if(n5) { if(n==1) cout"Lowest Price is $8"Endl; if(n==2) cout"Lowest Price is"8*0.95"Yuan"Endl; if(n==3) cout"Lowest Price is"8*0.9"Yuan"Endl; if(n==4) cout"Lowest Price is"8*0.8"Yuan"Endl; } Else { if(n%5==0) {cout"set of 5 copies of

The key is to achieve what ~, the algorithm is used to solve the actual problem.Encoding, decoding, Huffman algorithm (prefix-coded lossless compression algorithm) the experience of the predecessors is still very cool. We're all standing on the shoulders of giantsFibonacci sequenceData structure: queue, stack, linked list, binary tree, red black tree,Bayesian law (conditional probability)Variance and Standard deviationMatrix manipulation (LUA decomposition, Lagrangian formula)Multithreading algo

Introduction to Linux cgroups Above is the namespace technology for building Linux containers, which helps isolate the process from its own space, but how Docker limits the size of each space to ensure they don't scramble with each other. Then you need to use the Cgroups technology of Linux. Concept The Linux cgroups (Control Groups) provides the resources for a set of processes and future child processes, including CPU, memory, storage, network, etc