Hf

Definitions

  • WordNet 3.6
    • n HF 3 to 30 megahertz
    • n Hf a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
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Century Dictionary and Cyclopedia
    • n Hf A contraction of half.
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Usage

In literature:

Anderson's Royal Genealogies, or the Genealogical Tables of Emperors, Kings, and Princes, from Adam to these times, folio, hf.
"Notes & Queries, No. 42, Saturday, August 17, 1850" by Various
The line FG 6000. and fg 5267. therefore hf.
"Micrographia" by Robert Hooke
Met., last edit., hf.
"Notes and Queries, Number 211, November 12, 1853" by Various
Post 8vo, printed on laid paper and hf.-bd., =2s.= each.
"The Ivory Gate, a new edition" by Walter Besant
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In news:

The ACA.HF Analyzer: The New Standard in Safety, Simplicity and Accuracy for Analyzing HF Catalyst.
It is possible to transit some areas of Gander Oceanic Airspace with only VHF, but in some cases HF is required.
Getting and Installing an HF Beam.
The Xantrex Freedom HF inverter -charger is offered as an option by major truck manufacturers.
Koch Membrane Systems Inc will introduce Targa II HF, a new hollow-fiber ultrafiltration membrane system, in June at American Water Works Association's annual ACE11 conference.
We plan on having HF and vhf/uhf soon.
In aviation's early days, long-distance HF communications used wire antennas trailing behind the aircraft.
HF Financial is partnering with the Charlotte Zoological Park's Think Recycling program to keep electronics and business waste out of landfills.
She and Sagacious HF made waves at the Dressage at Holiday and Horses in Wellington, Fla.
Aircraft Without HF Concern Gander ANS.
Study presented at ESC may offer new diagnostic measure for HF.
Despite several notices sent to Hockey Federation over a long span of time HF has not been able to pay the water bills to KW&SB for last 15 years.
To those of you who managed to check into the first TALARC HF net last week, thank you.
There was to be a HF station and possibly some other Amateur Radio activities available.
These materials are ideal for use in vehicular collision-avoidance systems, as well as for EMI suppression in a range of applications from HF through millimeter-wave frequencies.
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In science:

Lemma 13 When Q : (L∗)i → L is continuous, then the fol lowing are equivalent. (1) ∀f ∈ (L∗ )i , x ∈ Im Q , hf , xi ≥ hf , Q(f )i (2) ∀f ∈ (L∗ )i , x ∈ Im Q \ {Q(f )} , hf , xi > hf , Q(f )i (2) ⇒ (1) is trivial.
A Linear Programming Approach to Attainable Cram\'{e}r-Rao type Bounds and Randomness Condition II
L∗)i , x ∈ C ⇒ hf , xi ≥ hf , Q(f )i (2) f ∈ (L∗)i , x ∈ C, x 6= Q(f ) ⇒ hf , xi > hf , Q(f )i. (2) ⇒ (1) is trivial.
A Linear Programming Approach to Attainable Cram\'{e}r-Rao type Bounds and Randomness Condition II
L∗)i and x ∈ C such that x 6= Q(f ), hf , Q(f )i ≥ hf , xi.
A Linear Programming Approach to Attainable Cram\'{e}r-Rao type Bounds and Randomness Condition II
By the hypothesis, hf , Q(f )i = hf , xi. y , f (λ) and x(λ) are defined as follows: for λ > 0, y := x − Q(f ), f (λ) := f − λg (y ), x(λ) := Q(f (λ)) − Q(f ).
A Linear Programming Approach to Attainable Cram\'{e}r-Rao type Bounds and Randomness Condition II
Because X is x-independent the averages hf (X )i or hf ( ¯X )i are all in flavor space and well-defined.
Generalized heat kernel coefficients
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