22-letter words containing h, y
- evolutionary algorithm — (EA) An algorithm which incorporates aspects of natural selection or survival of the fittest. An evolutionary algorithm maintains a population of structures (usually randomly generated initially), that evolves according to rules of selection, recombination, mutation and survival, referred to as genetic operators. A shared "environment" determines the fitness or performance of each individual in the population. The fittest individuals are more likely to be selected for reproduction (retention or duplication), while recombination and mutation modify those individuals, yielding potentially superior ones. EAs are one kind of evolutionary computation and differ from genetic algorithms. A GA generates each individual from some encoded form known as a "chromosome" and it is these which are combined or mutated to breed new individuals. EAs are useful for optimisation when other techniques such as gradient descent or direct, analytical discovery are not possible. Combinatoric and real-valued function optimisation in which the optimisation surface or fitness landscape is "rugged", possessing many locally optimal solutions, are well suited for evolutionary algorithms.
- fall prey to something — To fall prey to something bad means to be taken over or affected by it.
- fetal alcohol syndrome — a pattern of birth defects caused by maternal consumption of alcohol during pregnancy: considered as one of the fetal alcohol spectrum disorders. Abbreviation: FAS.
- fifth earl of rosebery — Archibald Philip Primrose [prim-rohz] /ˈprɪmˌroʊz/ (Show IPA), 5th Earl of, 1847–1929, British statesman and author: prime minister 1894–95.
- four-hundred-day clock — a clock that needs to be wound once a year, having the works exposed under a glass dome and utilizing a torsion pendulum.
- frequency shift keying — (communications) (FSK) The use of frequency modulation to transmit digital data, i.e. two different carrier frequencies are used to represent zero and one. FSK was originally used to transmit teleprinter messages by radio (RTTY) but can be used for most other types of radio and land-line digital telegraphy. More than two frequencies can be used to increase transmission rates.
- glossopharyngeal nerve — either of the ninth pair of cranial nerves, consisting of motor fibers that innervate the muscles of the pharynx, the soft palate, and the parotid glands, and of sensory fibers that conduct impulses to the brain from the pharynx, the middle ear, and the posterior third of the tongue.
- go their separate ways — When two or more people who have been together for some time go their separate ways, they go to different places or end their relationship.
- grand duchy of muscovy — Muscovy (def 1).
- graph rewriting system — An extension of a term rewriting system which uses graph reduction on terms represented by directed graphs to avoid duplication of work by sharing expressions.
- graphical display unit — an output device incorporating a cathode ray tube on which both line drawings and text can be displayed. It is usually used in conjunction with a light pen to input or reposition data
- greystone technologies — (company) The producers of the GT/M MUMPS compiler and GT/SQL pre-processor for VAX and DEC Alpha.
- happy valley-goose bay — a twin town in SE Labrador in Newfoundland, E Canada, consisting of an air base, Goose Bay, and its adjacent residential town of Happy Valley: used as a fuel stop by some transatlantic airplanes.
- have a way with sth/sb — If you say that a person has a way with something or someone, you mean that that person seems to have a natural skill or instinct for dealing with them.
- have other fish to fry — have sth else to do
- heart is in your mouth — If your heart is in your mouth, you feel very excited, worried, or frightened.
- here's mud in your eye — a humorous drinking toast
- hermann-mauguin symbol — a notation for indicating a particular point group.
- hexahydroxycyclohexane — inositol.
- hexamethylenetetramine — a white, crystalline, water-soluble powder, C 6 H 12 N 4 , used as a vulcanization accelerator, an absorbent in gas masks, in the manufacture of the explosive RDX and synthetic resins, and in medicine as a diuretic and urinary antiseptic.
- highway contract route — a route for carrying mail over the highway between designated points, given on contract to a private carrier and often requiring, in rural areas, delivery to home mailboxes. Abbreviation: HCR.
- holy day of obligation — a day on which Roman Catholics are duty-bound to attend Mass and abstain from certain kinds of work.
- hybrid multiprocessing — (parallel) (HMP) The kind of multitasking which OS/2 supports. HMP provides some elements of symmetric multiprocessing, using add-on IBM software called MP/2. OS/2 SMP was planned for release in late 1993.
- hydrocinnamic aldehyde — a colorless liquid, C 9 H 10 O, having a floral odor, used in perfumery and flavoring.
- hydrogen embrittlement — the weakening of metal by the sorption of hydrogen during a pickling process, such as that used in plating
- hypothetical syllogism — a hypothetical syllogism has two uses. In propositional logic it expresses one of the rules of inference, while in the history of logic, it is a short-hand for the theory of consequence
- in one's birthday suit — naked; nude
- in the eye of the wind — directly against the wind
- industrial archaeology — the study of past industrial machines, works, etc
- information technology — the development, implementation, and maintenance of computer hardware and software systems to organize and communicate information electronically. Abbreviation: IT.
- intentionally homeless — without anywhere to leave because one has left accommodation voluntarily
- katharine meyer graham — Katharine Meyer, 1917–2001, U.S. newspaper publisher.
- ketamine hydrochloride — a powerful anesthetic, C13H16ClNO·HCl, used in surgery
- kill yourself laughing — If you say that you killed yourself laughing, you are emphasizing that you laughed a lot because you thought something was extremely funny.
- kinetic theory of heat — a theory that the temperature of a body is determined by the average kinetic energy of its particles and that an inflow of heat increases this energy.
- land of milk and honey — a land of unusual fertility and abundance.
- limited access highway — expressway
- martin luther king day — the third Monday in January, a legal holiday in some states of the U.S., commemorating the birthday (Jan. 15) of Martin Luther King, Jr.
- methyl isobutyl ketone — a colorless, slightly water-soluble, flammable liquid, C 6 H 1 2 O, having a pleasant odor: used as a solvent for nitrocellulose, gums, resins, fats, waxes, and oils.
- microspectrophotometry — a spectrophotometer for examining light emitted, transmitted, or reflected by minute objects.
- mother carey's chicken — any of various small petrels, especially the stormy petrel, Oceanites oceanicus.
- myalgic encephalopathy — a condition characterized by painful muscles, extreme fatigue, and general debility, sometimes occurring as a sequel to viral illness
- nitrohydrochloric acid — aqua regia.
- nodal switching system — (NSS) Main routing nodes in the NSFnet backbone.
- non-hodgkin's lymphoma — Pathology. any of several malignancies of the lymphatic system in which the cells characteristic of Hodgkin's disease are absent.
- northern redbelly dace — any of the small, brightly colored North American freshwater cyprinids, especially Phoxinus oreas (northern redbelly dace) and P. erythrogaster (southern redbelly dace)
- oak processionary moth — a moth, (Thaumetopoea processionea), of the family Thaumetopoeidae, the larvae of which leave the communal shelter nightly for food in a V-shaped procession
- obligational authority — the necessary authority that precedes budget spending by a government agency or department, granted by Congress through appropriations.
- on the way/on it's way — If something is on the way, it will arrive soon.
- once bitten, twice shy — You say 'once bitten, twice shy' when you want to indicate that someone will not do something a second time because they had a bad experience the first time they did it.