X-Nico

unusual facts about variable-frequency drive



Abacavir

In African Americans, the prevalence is estimated to be 1.0% on average, 0% in the Yoruba from Nigeria, 3.3% in the Luhya from Kenya, and 13.6% in the Masai from Kenya, although the average values are derived from highly variable frequencies within sample groups.

Arthur Ernest Bishop

These were significant and partly as a result, he was able in 1954 to move to Detroit, Michigan, USA, with ideas and patents to improve steering systems for automobiles, and for the next two decades introduced improvements into various vehicles around the world mainly in aspects of hydraulically powered and variable-ratio steering.

Bayesian multivariate linear regression

Bayesian approach to multivariate linear regression, i.e. linear regression where the predicted outcome is a vector of correlated random variables rather than a single scalar random variable.

Bregman method

Then, for each constraint a generalized projection onto its feasible set is performed, updating both the constraint's dual variable and all primal variables for which there are non-zero coefficients in the constraint functions gradient.

Buddleja mendozensis

Buddleja mendozensis is an extremely variable species endemic to the xeric and subxeric areas of Argentina, from Jujuy to southern Mendoza and La Pampa, where it grows on rocks at altitudes of 600 – 3,000 m.

Clássico dos Milhões

Poll estimations, though variable, attribute Flamengo and Vasco with a combined share of about 20% of the overall population, i.e. totalling 45 million supporters nationwide (typically 30 million to Flamengo and 15 million to Vasco).

Cochran test

Cochran's Q test, a non-parametric test that is applied to the analysis of two-way randomized block designs with a binary response variable.

Colias chlorocoma

C. chlorocoma is rather variable, in particular the green wing pigmentation differs from population to population but is usually greenish-yellow, C. sagartia is greenish.

Dabos JD.24P D'Artagnan

The projected production version was to have a non-retractable faired undercarriage, variable-pitch airscrews in place of the prototype's fixed-pitch units, and 115 h.p. Potez engines.

Dbx, Inc.

The most important inventions of David Blackmer and dbx are the dbx voltage controlled amplifier or VCA and the dbx RMS detector.

Dennis Mendiola

In late 2004 as twin killer typhoons Yoyong and Winnie ravaged southern Luzon in the main Philippine Island, “Donate-a-Load” was launched whereby millions of Filipinos where encouraged to donate their call credits by simply texting variable amounts to a Red Cross short code.

Doomsday argument

Applying Gott's DA to these variable definitions gives a 50% chance of doomsday within 50 years.

Electricity sector in Honduras

EMCE and Lufussa managed to sign new contracts with the government of Carlos Flores (1998–2002), which included tax exemptions for up to five years and the payment of fixed and variable charges, the former independently of whether energy was actually being produced, as it is typically the case in Power Purchase Agreements.

Engine efficiency

Others before Corliss had at least part of this idea, including Zachariah Allen, who patented variable cut off, but lack of demand, increased cost and complexity and poorly developed machining technology delayed introduction until Corliss.

English Braille

In the finalized form as of 2013, UEB upgrades English Braille Grade 2 (the literary coding used in several slightly-variable forms in different countries), obsoletes Computer Braille Code by making email/website/programming syntax part of literary coding, and in some ways competes with Nemeth Code by adding additional math-notation (albeit Taylor-style with the numerals overwriting letters rather than overwriting punctuation as in Nemeth) to the literary coding.

General Motors High Value engine

These engines (aside from the LX9) are the first cam in block engines to implement Variable Valve Timing, and won the 2006 Breakthrough Award from Popular Mechanics for this innovation.

Gymnastic formation

The performance of the NGOs, such as the SGI, is widely variable, such as, bi-dimensional wave, sky rocket, windmill, walking wall, walking pyramid, catapult, instantaneous stand-up pyramid, instantaneous stand-up tower, three-layers' plane tower, four-layers' tower, and rarely five-layers' tower.

Hidden transformation

The graph representing the result of this transformation is bipartite, as all constraints are between a new and an old variable.

Histidine kinase

A two-component system, involving histidine kinase and a variable response regulator protein, may be critical to the virulence of some fungal strains such as Candida albicans, which is often responsible for causing candidiasis in immunocompromised persons.

Horizontal branch

These pulsating horizontal-branch stars are known as RR Lyrae variable stars and they are obviously variable in brightness with periods of up to 1.2 days

Intervening variable

The term “intervening variable” was first used by behavioral psychologist Edward C. Tolman in 1938.

Jacobi–Madden equation

Noam Elkies was first to find an infinite series of solutions to Euler's equation with exactly one variable equal to zero, thus disproving Euler's sum of powers conjecture for the fourth power.

Lazy initialization

Scala has built-in support for lazy variable initiation.

Mazda B engine

It features S-VT variable valve timing on the intake side, no more VICS, but there is Variable Tumble Control System (VTCS) in the BP-Z3.

Mölndal

Annelie Pompe, world record holder in Variable weights freediving

Motor variable

At the National University of La Plata in 1935, J.C. Vignaux, an expert in convergence of infinite series, contributed four articles on the motor variable to the university’s annual periodical.

Mount Stony Brook Observatory

The dome contains a Meade 14" Maksutov–Cassegrain telescope and SBIG (SBIG-STL1001e) imaging equipment. The telescope is used for teaching undergraduate and graduate astronomy labs by the department, as well as by the Astronomy club. The observatory's imaging capabilities have been used to monitor variable stars. On the first Friday of every month during the school year the department hosts "Astronomy Open Nights" during which a lecture is given, followed by observing if the weather permits.

Negative amortization

: The variable, such as the COFI; COSI; CODI or often MTA, which determines the adjustment as an increase or decrease in the interest rate.

Operating point

In the past shunt-motors have been used for this purpose, nowadays asynchronous AC motors are being used or AC motors in combination with a variable frequency drive.

Pavel Sukhoi

He also pioneered variable-sweep aircraft, such as the Su-17 and the Su-24.

Pelamis platura

Colors of the snake are variable, but most often distinctly bicolored, black above, yellow or brown below, with the dorsal and ventral colors sharply demarcated from one another; ventrally, there may be a series of black spots or bars on the yellow or brown background, or the yellow may extend dorsally so there is only a narrow middorsal black stripe, or a series of black crossbars (M.A. Smith, 1943: 476–477, gives more complete descriptions of the color pattern variants).

Pieris bryoniae

This is because one of the most variable populations of this butterfly lives in the well-known Mödling area near Vienna.

Polony sequencing

Also, it is a very flexible technique that enables variable application including BAC (bacterial artificial chromosome) and bacterial genome resequencing, as well as SAGE (serial analysis of gene expression) tag and barcode sequencing.

PPML

PPML (Personalized Print Markup Language) is an XML-based industry standard printer language for variable data printing defined by PODi.

Probit model

Suppose response variable Y is binary, that is it can have only two possible outcomes which we will denote as 1 and 0.

Return statement

In Windows PowerShell all evaluated expressions which are not captured (e.g., assigned to a variable, cast to void or piped to $null) are returned from the subroutine as elements in an array, or as a single object in the case that only one object has not been captured.

Ruston-Bucyrus

In 1990 RB bought from its rival Priestman, the design and manufacturing rights to Priestman's Variable Counterbalance hydraulic/cable long reach excavator range and its extensive range of Grabs.

Septuagesima

In the Church of England these Sundays retain their original designations where the Prayer Book Calendar is followed, but in the Common Worship Calendar they have been subsumed into a pre-Lent season of variable length, with anything from zero to five "Sundays before Lent" depending on the date of Easter.

Shuldham Peard

He fell in with them off Cape Gata, but was prevented by calms and variable winds from passing, and, after a chase of three days, was overtaken and captured.

Snake case

Python, for variable names, function names, and method names

Split-8

The footswitch can be programmed to momentarily change patches, or change one of several patch parameters: filter cutoff frequency, envelope amount or attack; VCA decay or release; voice volume (the momentary value of any of the preceding being user-defined); chorus on/off, or portamento on/off.

SuperDrive

This was made possible as the SuperDrive now utilitized the same MFM (Modified Frequency Modulation) encoding scheme used by the IBM PC, yet still retained backward compatibility with Apple's variable-speed zoned CAV scheme and Group Code Recording encoding format, so it could continue to read Macintosh MFS, HFS and Apple II ProDOS formats on 400/800 KB disks.

Thick-billed Vireo

The Thick-billed Vireos song is a variable and rapid six to seven note phrase, starting and ending with a sharp chick, very similar to the White-eyed Vireo, but slightly harsher in sound.

Variable fighter

A Variable Fighter is a series of fictional transforming aerospace fighter mecha primarily designed by Studio Nue's Shoji Kawamori for the animated series The Super Dimension Fortress Macross and later related projects.

Variable Geometry Acoustical Dome

“Variable geometry acoustical domes” is a design concept developed by David Serero in 2004, at the Villa Medici in Rome.

Variable interpolation

Languages that support variable interpolation include Perl, PHP, Ruby, Tcl, Groovy, and most Unix shells.

Variable-speed air compressor

The most common form of VSD technology in the air compressor industry is a variable-frequency drive, which converts the incoming AC power to DC and then back to a quasi-sinusoidal AC power using an inverter switching circuit.

VTAC

A slang term for VTEC, a variable valve timing system used in Honda engines

WHEP-TRS protein domain

They are found in variable numbers in a particularly common protein, named, glutamyl-prolyl tRNA synthetase(EPRS).

Wind turbine aerodynamics

Buckingham π theorem can be applied to show that non-dimensional variable for power is given by the equation below.


see also