**Daily update | 18 March, 2023**

# StackExchange

#### Putting a constraint on the output of the neural network

**Source:** stats**Views:** 23**Score:** 3**Tags:** regression neural-networks complex-numbers activation-function

#### Practical usefullness of PCA

**Source:** stats**Views:** 32**Score:** 2**Tags:** machine-learning pca

#### How to approximate non-central chisquare distribution to Poisson weighted sum of central chi-square distribution in case of non-unit variances?

**Source:** stats**Views:** 25**Score:** 2**Tags:** distributions poisson-distribution density-function chi-squared-distribution non-central

#### Fraud detection model retraining

**Source:** stats**Views:** 9**Score:** 2**Tags:** machine-learning fraud-detection

#### $\langle X^4\rangle \ge 3 \langle X^2\rangle^2$?

**Source:** stats**Views:** 51**Score:** 2**Tags:** moments probability-inequalities inequality