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.
math system
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.
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.
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.
"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.
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).
Complex numbers are a special kind of number in math, written in the form a + bi, where a and b are real numbers and i is the imaginary unit that satisfies i² = -1. They expand the range of real numbers, allowing some equations that originally had no solutions to have answers, and they're commonly used in fields like physics, engineering, and signal processing.
Compound interest, commonly known as 'interest on interest,' refers to the method of adding interest to the principal and then calculating interest again, allowing your money to grow exponentially over time.
Compound measurement mainly refers to a method in industrial precision inspection where multiple detection technologies, like contact probes and optical imaging, are installed on the same device to collect comprehensive data from a workpiece. This approach allows the dimensional, shape, and positional error inspections of complex parts to be completed on one machine without repeatedly disassembling the workpiece, making it both fast and accurate. Besides the industrial field, social sciences and surveying also have their own concepts of "compound measurement," but the meanings are different.