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While emulation could, if taken to the extreme, go down to the atomic level, basing its output on a simulation of the actual circuitry from a virtual power source, this would be a highly unusual solution. Emulators typically stop at a simulation of the documented hardware specifications and digital logic.
Human-in-the-loop simulation of outer space Visualization of a direct numerical simulation model. Historically, simulations used in different fields developed largely independently, but 20th-century studies of systems theory and cybernetics combined with spreading use of computers across all those fields have led to some unification and a more systematic view of the concept.
Gaussian process emulator, a special case of the Gaussian process in statistics; Surrogate model, a model which imitates or emulates a more complicated (usually in terms of computer simulation time) model. ASC Emulation, a football club in Martinique; Emulation (observational learning), a theory of comparative psychology
Ikos NSIM-64 Hardware simulation accelerator. In integrated circuit design, hardware emulation is the process of imitating the behavior of one or more pieces of hardware (typically a system under design) with another piece of hardware, typically a special purpose emulation system.
Because the results of a simulation are only as good as the underlying model(s), engineers, operators, and analysts must pay particular attention to its construction. To ensure that the results of the simulation are applicable to the real world, the user must understand the assumptions, conceptualizations, and constraints of its implementation.
Dynamic binary translation differs from simple emulation (eliminating the emulator's main read-decode-execute loop—a major performance bottleneck), paying for this by large overhead during translation time. This overhead is hopefully amortized as translated code sequences are executed multiple times.
This step brings a lot of uncertainties because the real hardware is normally not as ideal as the simulation model. The differences between real world and simulation are a major reason why emulation is used in hardware design. Generally the simulation and emulation environment are two independent systems. Semulation is a symbiosis of both methods.
Network emulation is the act of testing the behavior of a network (5G, wireless, MANETs, etc) in a lab. A personal computer or virtual machine runs software to perform the network emulation; a dedicated emulation device is sometimes used for link emulation. Networks introduce delay, errors, and drop packets.