It's a number used to show how likely something is to happen. For a random event A, its probability is denoted as P(A).
"Probability levels" usually refer to the qualitative or quantitative grading of how likely an event is to happen in risk assessment, reliability engineering, or safety analysis (commonly from levels 1–5 or A–E), but the exact divisions vary by industry/standard, and there's no unified global standard.
A probability distribution is a complete mathematical description of all possible values a random variable can take and their corresponding probabilities. It reveals the statistical patterns behind random events and is the foundation of probability theory and statistics.
The degree of height; the distance from the ground or a reference point up to somewhere; the distance from the bottom to the top of an object.
Fractal is a geometric term officially proposed by mathematician Benoît B. Mandelbrot in 1975. It refers to a complex geometric shape that has self-similarity and usually a non-integer (fractional) dimension. It's considered a mathematical language for describing irregular forms in nature and is also called 'the geometry of nature.'
Engineering is a systematic activity based on scientific knowledge and technical methods, where organized collaboration turns physical things into man-made products with practical value, and it draws on theories from multiple disciplines like math, physics, and chemistry.
Fractal geometry is a branch of geometry that studies irregular geometric shapes. Its main focus is on describing and studying complex structures that are self-similar (parts resemble the whole) and have non-integer dimensions, which is why it’s often called 'the geometry of nature'.
Industry is the sector that involves extracting natural resources and processing and reprocessing mined materials and agricultural products, providing basic material support for the national economy.
It’s the part of a fraction in math, referring to the number written above the fraction line, usually an integer.
An arc usually refers to a geometric shape, formed by a chord and a curve, and its area is calculated by adding and subtracting sectors and triangles.