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Parity check

29/10/2021 1687
Parity check

Basic introduction How it worksIn order to detect and correct memory soft errors, the first thing that appears is memory "parity". The smallest unit in the memory is a bit, which is also called a "b...


Expanded memory

27/10/2021 1541
Expanded memory

Introduction Expanded memory (Expanded Memory) can also be converted from expanded memory simulation. Therefore, the difference between expanded memory and expanded memory does not lie in the locati...


Memory expansion

27/10/2021 1563
Memory expansion

Implementation technologyVirtual storage technology is the main means to realize memory expansion. It regards external memory as a direct extension of memory, thus combining limited real memory (ref...


Virtual circuit

26/10/2021 1476
Virtual circuit

Introduction A virtual circuit is a link between two or more end stations on a packet-switched network. It provides temporary or dedicated connection-oriented sessions between two endpoints. Definin...


EMU auxiliary power supply system

26/10/2021 1503
EMU auxiliary power supply system

Introduction This book explains in detail the basic principles and overview of the auxiliary power supply system for EMUs. It focuses on the basic knowledge and maintenance, maintenance and overhaul...


High-strength steel sheet

25/10/2021 1409
High-strength steel sheet

Introduction High-strength thin steel sheet refers to a strip of 0.1~4mm rolled from low-alloy high-strength steel, which is named after its high strength. Characteristics High-strength steel sheet...


Silicon steel sheet iron core

25/10/2021 1384
Silicon steel sheet iron core

is also the material with the largest amount of magnetic materials used in power transformers. Especially suitable for low frequency and high power. Commonly used are cold-rolled silicon steel sheet...


Super Permalloy

24/10/2021 1773
Super Permalloy

Introduction Ultrapermalloy refers to a nickel-iron alloy with high permeability of 5Mo%, 79Ni%, and the rest is iron and a small amount of manganese. Its initial permeability and maximum permeabili...


Ammonite

24/10/2021 1631
Ammonite

Iron-nickel alloyiron-nickel alloyAlso includes the following alloys: (1) 68Fe+27Ni+5Mo and 53Fe+42Ni+5Mo, with It has a high thermal expansion coefficient and can be used as the bimetallic sheet of t...


Saturation magnetization

23/10/2021 1535
Saturation magnetization

Overview Saturation magnetization is a characteristic of ferromagnetic materials. Ferromagnetic materials are magnetized under the action of an external magnetic field. At the beginning, with the gr...


Soft magnetic core

23/10/2021 1482
Soft magnetic core

Common magnetic performance parameters of soft magnetic materials Saturation magnetic induction intensity bs: Its size depends on the composition of the material, and its corresponding physical state...


Pseudocrystalline growth technology

22/10/2021 1397
Pseudocrystalline growth technology

In epitaxial growth, when the lattice constants of the growth layer and the substrate are mismatched, there will be stress and strain energy accumulated in the growth layer, and this energy will incre...


Crystal growth theory

22/10/2021 1863
Crystal growth theory

Basics The thermodynamic theory of crystal growth  J.W. Gibbs's famous paper "On the Balance of Multiphase Matter" published in 1878 laid the foundation of the thermodynamic theory. He analyzed the...


Social Systems Engineering Expert Group

21/10/2021 1281
Social Systems Engineering Expert Group

Organizational Overview The secretariat work and technical support of the Social System Engineering Expert Group are undertaken by the Realizer Beijing Institute of Social System Engineering (RISSE)...


System Engineering Application

21/10/2021 1509
System Engineering Application

Research object System engineering takes complex large-scale systems as the research object, which was first proposed and applied by Bell Telephone Company in the 1940s. The development of some larg...


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