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To explain this enhancement in a given harmonic order, the former three-step model was modified and a new four-step model was introduced. This model takes into account the role of autoionization states present in the continuum. The first two steps remain the same i.e. the tunnel ionization and the acceleration of this tunnel ionized electron in ...
STEP-NC interface on a CNC, showing product shape and color-coded tolerance state. STEP-NC is a machine tool control language that extends the ISO 10303 STEP standards with the machining model in ISO 14649, [1] adding geometric dimension and tolerance data for inspection, and the STEP PDM model for integration into the wider enterprise.
The basis for STEP was the Product Data Exchange Specification (PDES), which was initiated during the mid-1980's and was submitted to ISO in 1988. [4] [5] The Product Data Exchange Specification (PDES) was a data definition effort intended to improve interoperability between manufacturing companies, and thereby improve productivity.
The PDP–11/45 had a dedicated data path within the CPU, connecting semiconductor memory to the processor, with core memory and I/O devices connected via the Unibus. [10] In the PDP–11/70, this was taken a step further, with the addition of a dedicated interface between disks and tapes and memory, via the Massbus. Although input/output ...
A STEP-file is ASCII text with the format defined in ISO 10303-21 Clear Text Encoding of the Exchange Structure. [2] ISO 10303-21 defines the encoding mechanism for representing data conforming to a particular schema in the EXPRESS data modeling language specified in ISO 10303-11. A STEP-File is also called p21-File and STEP Physical File.
Modified PDP-7 under restoration in Oslo, Norway PDP-7 at living computer museum. The PDP-7 is an 18-bit minicomputer produced by Digital Equipment Corporation as part of the PDP series. Introduced in 1964, [3]: p.8 [4] shipped since 1965, it was the first [5] to use their Flip-Chip technology.
Peripheral Interchange Program (PIP) was a utility to transfer files on and between devices on Digital Equipment Corporation's computers. It was first implemented on the PDP-6 architecture by Harrison "Dit" Morse early in the 1960s.
In digital electronics, the power–delay product (PDP) is a figure of merit correlated with the energy efficiency of a logic gate or logic family. [1] Also known as switching energy , it is the product of power consumption P (averaged over a switching event) times the input–output delay or duration of the switching event D . [ 1 ]