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description: Using custom number systems to improve accuracy
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# Accuracy

Accuracy is a property of a computational algorithm and is a measure of goodness comparing the computational results against the truth. For example, in computational engineering, we might want to model fluid flow and calculate the drag of a vehicle to guide a design optimization to improve the fuel efficiency of the vehicle. Here the accuracy of the fluid flow simulation is important to reduce the cost of vehicle development.

Accuracy is not precision. Accuracy is a measure of adherence to the truth. Precision is a measure of the quantization of an encoding.
