Matrix subtraction requires the two matrices to have exactly the same number of rows and columns. When calculating, you subtract the numbers in corresponding positions one by one to get a new matrix with the same dimensions.

Distance refers to the straight-line length between two points and is a scalar; displacement refers to the actual length of an object's movement path, and it is also a scalar. The main difference is: distance is the shortest path between two points (straight-line distance) and only depends on the starting and ending positions; displacement is the length of the actual path traveled and depends on the movement trajectory.

A time-distance diagram, fully called a "time-distance diagram," is used in urban traffic signal line control and area control systems to coordinate the green light phase gaps of adjacent intersections. Line control is managed by the signal center controller, which oversees the local controllers to keep the system running smoothly.

Integration is a core concept of calculus in math.

In math, a set is when you treat some specific objects as a whole. These objects are called elements and are one of the most fundamental concepts in mathematics.

Geometry is the branch of math that studies the shapes, sizes, and positions of things in space. Simply put, it's about figuring out what objects look like, how much space they take up, and how to arrange them.

Computation, a math term, is a way of thinking that turns single or multiple input values into single or multiple results.

Computer graphics is a branch of computer graphics that refers to the technology of processing non-graphic information through a computer to generate graphics. It has features like high efficiency, high quality, and easy modifications, which sets it apart from traditional hand drawing.

In a process of change, if there are two variables x and y, and for every value of x there is a unique value of y corresponding to it, then y is a function of x.

Computer science is the study of computers and the various phenomena and rules around them. It deals with computer system architecture, software, artificial intelligence, and the nature and problems of computation itself. Computer science is a systematic field that covers a wide range of topics related to computing and information processing, from abstract algorithm analysis to formal syntax, and so on.