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Low-density parity-check (LDPC) codes are a class of highly efficient linear block codes made from many single parity check (SPC) codes. They can provide performance very close to the channel capacity (the theoretical maximum) using an iterated soft-decision decoding approach, at linear time complexity in terms of their block length.
The actual maximum code rate allowed depends on the error-correcting code used, and may be lower. This is because Shannon's proof was only of existential nature, and did not show how to construct codes that are both optimal and have efficient encoding and decoding algorithms.
ASHRAE was founded in 1894 at a meeting of engineers in New York City, formerly headquartered at 345 East 47th Street, and has held an annual meeting since 1895. [4] Until 1954 it was known as the American Society of Heating and Ventilating Engineers (ASHVE); in that year it changed its name to the American Society of Heating and Air-Conditioning Engineers (ASHAE). [5]
YouTube TV is an American Internet Protocol television service operated by YouTube, a subsidiary of Google, which in turn is a subsidiary of Alphabet Inc. Announced on February 28, 2017, [2] the virtual multichannel video programming distributor offers a selection of live linear channel feeds and on-demand content from more than 100 television networks (including affiliates of the Big Three ...
Members of ASHRAE receive the current volume, in both print and CD-ROM form, each year as a basic membership benefit. An enhanced electronic version, known as ASHRAE Handbook Online is a web-based version updated annually that contains the four latest volumes as well as extra content such as calculations, demonstration videos, and spreadsheets ...
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The only outside materials allowed are a temperature / pressure chart, scratch paper and a calculator. The certification exam contains 4 sections: Core, Type I, Type II, and Type III. Each section contains 25 multiple choice questions.