teljesítményfüggvény

A "teljesítményfüggvény" in Hungarian translates to "performance function" or "power function" in English, depending on the context. In engineering and economics, it commonly refers to a mathematical relationship that describes how an output or performance metric changes as a function of one or more input variables. These functions are crucial for modeling, analyzing, and optimizing systems.

A typical performance function might express output power as a function of input voltage, or production yield as a function of resource allocation. The specific form of the function can vary widely, ranging from simple linear relationships to complex non-linear equations, including polynomial, exponential, or logarithmic forms. The goal is often to identify the parameters of the function that best fit observed data or to determine the input values that maximize or minimize the performance metric.

In machine learning, the term "loss function" or "cost function" is often used, which is essentially a performance function that the model aims to minimize. Conversely, a "reward function" in reinforcement learning serves a similar purpose, guiding an agent to maximize desired outcomes. Understanding and accurately defining the performance function is fundamental to many scientific and engineering disciplines, enabling effective design, control, and decision-making.