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A brand of autofocusing camera uses a microprocessor-based feedback control system consisting of a CCD imaging system, a microprocessor, a drive motor, and an optical encoder. The purpose of the control system is to focus the camera automatically based on the image of the subject as sensed by a matrix of CCDs (a set of metal-oxide-semiconductor field-effect transistors, or MOSFETs). The light rays from the subject that pass through the lens will fall onto the CCD matrix. This will generate a matrix (image frame) of charge signals, which are shifted one at a time, row by row, into an output buffer (or frame grabber) and passed on to the microprocessor after conditioning the resulting video signal. The CCD image obtained by sampling the video signal is analyzed by the microprocessor to determine whether the camera is focused properly. If not, the lens is moved by the motor so as to achieve focusing. Draw a schematic diagram for the autofocusing control system and explain the function of each component in the control system, including the encoder.
in a rankine cycle steam leaves the boiler at 400 celsius and 5mpa. the condenser pressure is 0.01mpa. the water
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1 mole of Cr is added to a large quantity of Cr-Fe melt (solution). The temperature of the solid and the melt is 1600°C and XFe = 0.8. Assuming Raoultian behaviour, what are the enthalpy and entropy changes in the solution? The enthalpy of fusion of ..
Saturated moist air and condensate streams exit the dehumidifier unit at the same temperature. The moist air then passes through a heating unit, exiting at 248C, 1 bar, and 40% relative humidity. Neglecting kinetic and potential energy effects, de..
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