Hybrid computers are computers that comprise features of analog computers and digital computers. The digital component normally serves as the controller and provides logical operations, while the analog component normally serves as a solver of differential equations. In general, analog computers are extraordinarily fast, since they can solve most complex equations at the rate at which a signal traverses the circuit, which is generally an appreciable fraction of the speed of light. On the other hand, the precision of analog computers is not good; they are limited to three, or at most, four digits of precision. Digital computers can be built to take the solution of equations to almost unlimited precision, but quite slowly compared to analog computers. Generally, complex equations are approximated using iterative numerical methods which take huge numbers of iterations, depending on how good the initial "guess" at the final value is and how much precision is desired. (This initial guess is known as the numerical seed for the iterative process.) For many real-time operations, the speed of such digital calculations is too slow to be of much use (e.g., for very high frequency phased array radars or for weather calculations), but the precision of an analogcomputer is insufficient. Hybrid computers can be used to obtain a very good but relatively imprecise 'seed' value, using an analog computer front-end, which is then fed into a digital computer iterative process to achieve the final desired degree of precision. With a three or four digit, highly accurate numerical seed, the total digital computation time necessary to reach the desired precision is dramatically reduced, since many fewer iterations are required. Consider that the nervous system in animals is a form of hybrid computer. Signals pass across the synapses from one nerve cell to the next as discrete (digital) packets of chemicals, which are then summed within the nerve cell in an analog fashion by building an electro-chemical potential until its threshold is reached, whereupon it discharges and sends out a series of digital packets to the next nerve cell. The advantages are at least threefold: noise within the system is minimized (and tends not to be additive), no common grounding system is required, and there is minimal degradation of the signal even if there are substantial differences in activity of the cells along a path (only the signal delays tend to vary). The individual nerve cells are analogous to analog computers; the synapses are analogous to digital computers. Note that hybrid computers should be distinguished from hybrid systems. The latter may be no more than a digital computer equipped with an Analog-to-digital converter at the input and/or a Digital-to-analog converter at the output, to convert analog signals for ordinary digital signal processing, and conversely, e.g., for driving physical control systems, such as servomechanisms.
If you mean Hybrid, it is a computer which combines two different aspects of computers that are typically deployed individually.
It can mean many different things.
Most commonly, it refers to 'portable desktops', Binary and Analog computers, Binary and Decimal point processors, Multi-Technology Combinations [such as RISC, CISC, ARM, x86, etc.), and more.
Hybrid computers often have no operating system as they run single function software specific to the task they were designed for.
A hybrid computer is a computer in which part of the computations are performed by a digital computer and part of the computations are performed by an analog computer. They are typically designed to take advantage of the ability of analog computers to very rapidly compute a rough approximate solution then have the digital computer start from that approximation to reach an accurate solution more rapidly than if the digital computer had started working on the calculation entirely from scratch itself. If the digital computer part of this hybrid computer is a standard architecture it might be able to run a standard operating system, but often even if this is the case no operating system is used due to the overhead it adds.
I once worked on a hybrid computer based graphics system where a high speed custom designed digital computer calculated differential equation to draw symbols, then this was converted to analog waveforms that an analog computer positioned and rotated to place each symbol correctly on the display. This machine had no capability of running any operating system of any kind.
I am not aware of any hybrid computers designed since 1990 due to the rapidly increasing performance and reducing size of digital computers and the ease of programming digital computers compared to analog computers (which are required parts of any hybrid computer).
These computers are a combination of both digital and analog computers.
To define a hybrid computer would be to answer many questions about a hybrid.
Step 1: Pop it
Step 2: Lock it
Step 3: Polka dot it
Step 4: DO THE HOEDOWN
characteristics of hybrid computer
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