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A discrete cosine transform (DCT) expresses a finite sequence of data points in terms of a sum of cosine functions oscillating at different frequencies.The DCT, first proposed by Nasir Ahmed in 1972, is a widely used transformation technique in signal processing and data compression.
The modified discrete cosine transform (MDCT) is a transform based on the type-IV discrete cosine transform (DCT-IV), with the additional property of being lapped: it is designed to be performed on consecutive blocks of a larger dataset, where subsequent blocks are overlapped so that the last half of one block coincides with the first half of the next block.
The project generally considers any article related to aviation to be within its scope. Our primary work is concentrated in a number of broad areas: Aviation concepts (e.g., stall, mach) Aviation technologies not part of an airplane (e.g., airport surveillance radar) Articles about aircraft types (e.g., airliner, interceptor aircraft, helicopter)
The form of DCT used in signal compression applications is sometimes referred to as DCT-2 in the context of a family of discrete cosine transforms, [19] or as DCT-II. More recent standards have used integer-based transforms that have similar properties to the DCT but are explicitly based on integer processing rather than being defined by ...
Flight operational quality assurance (FOQA, / ˈ f oʊ. k w ə /) also known as flight data monitoring (FDM) or flight data analysis, is a method of capturing, analyzing and/or visualizing the data generated by an aircraft moving from one point to another.
Aviation engineering is a branch of engineering which deals with airspace development, airport design, aircraft navigation technologies, and aerodrome planning. It also involves the formulation of public policy, regulations, aviation laws pertaining to airspace, airlines, airports, aerodromes and the conduct of air services agreements through treaty.
Advanced Supersonic Transport (AST) model in wind tunnel. The aircraft design process is a loosely defined method used to balance many competing and demanding requirements to produce an aircraft that is strong, lightweight, economical and can carry an adequate payload while being sufficiently reliable to safely fly for the design life of the aircraft.
In project management, quality control requires the project manager and/or the project team to inspect the accomplished work to ensure its alignment with the project scope. [15] In practice, projects typically have a dedicated quality control team which focuses on this area.