TROPIC LOW WATER INEQUALITY

The average difference between the two low waters of the day at the times of the tropic tides. Applicable only when the type of tide is semidiurnal or mixed.

tropic_low_water_inequality low difference tide semidiurnal type_of_tide tropic

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PHASE-SHIFTING TRANSFORMER

A transformer which produces a difference in phase angle between two circuits.

phase-shifting_transformer in_phase phase difference two phase_angle angle

PHASE MARGIN

The difference between 180 and the phase of the loop ratio of a stable system at the gain-crossover frequency.

phase_margin loop ratio system phase difference

PHASE-BALANCE RELAY

Relay which functions by reason of a difference between two quantities associated with different phases of a polyphase circuit.

phase-balance_relay polyphase relay difference two

ORTHOMETRIC CORRECTION

A systematic correction that must be applied to a measured difference in elevation since level surfaces at varying elevations are not absolutely parallel.

orthometric_correction level correction elevation difference

OCEAN THERMAL-ENERGY CONVERSION

The conversion of energy arising from the temperature difference between warm surface water of oceans and cold deep-ocean current into electrical energy or other useful forms of energy. Abbreviated OTEC.

ocean_thermal-energy_conversion surface_water surface current difference temperature water conversion energy

NOMINAL BANDWIDTH

The difference between the nominal upper and lower cutoff frequencies of an acoustic or electric filter.

nominal_bandwidth electric acoustic difference cutoff

NEWTON'S LAW OF COOLING

The law that the rate of heat flow out of an object by both natural convection and radiation is proportional to the temperature difference between the object and its environment, and to the surface area of the object.

newton's_law_of_cooling surface heat rate radiation heat_flow difference flow convection law area natural_convection

MOLDING SHRINKAGE

Difference in dimensions between the molding and the mold cavity, measured at normal room temperature.

molding_shrinkage dimensions mold difference normal

MOISTURE GRADIENT

The difference in exit gases and that of moisture at ambient air temperature.

moisture_gradient moisture ambient air difference ambient_air

MODEL REFERENCE SYSTEM

An ideal system whose response is agreed to be optimum; computer simulation in which both the model system and the actual system are subjected to the same stimulus is carried out, and parameters of the actual system are adjusted to minimize the difference in the outputs of the model and the actual system.

model_reference_system system difference

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