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In mathematics, a weighted Voronoi diagram in n dimensions is a generalization of a Voronoi diagram . The Voronoi cells in a weighted Voronoi diagram are defined in terms of a distance function. The distance function may specify the usual Euclidean distance , or may be some other, special distance function. In weighted... | https://en.wikipedia.org/wiki/Weighted_Voronoi_diagram |
The weighted arithmetic mean is similar to an ordinary arithmetic mean (the most common type of average ), except that instead of each of the data points contributing equally to the final average, some data points contribute more than others. The notion of weighted mean plays a role in descriptive statistics and also o... | https://en.wikipedia.org/wiki/Weighted_arithmetic_mean |
Weighted correlation network analysis , also known as weighted gene co-expression network analysis (WGCNA), is a widely used data mining method especially for studying biological networks based on pairwise correlations between variables. While it can be applied to most high-dimensional data sets, it has been most wide... | https://en.wikipedia.org/wiki/Weighted_correlation_network_analysis |
In statistics , the weighted geometric mean is a generalization of the geometric mean using the weighted arithmetic mean .
Given a sample x = ( x 1 , x 2 … , x n ) {\displaystyle x=(x_{1},x_{2}\dots ,x_{n})} and weights w = ( w 1 , w 2 , … , w n ) {\displaystyle w=(w_{1},w_{2},\dots ,w_{n})} , it is calculated as: [ 1... | https://en.wikipedia.org/wiki/Weighted_geometric_mean |
Physicists often use various lattices to apply their favorite models in them. For instance, the most favorite lattice is perhaps the square lattice. There are 14 Bravais space lattice where every cell has exactly the same number of nearest, next nearest, nearest of next nearest etc. neighbors and hence they are called ... | https://en.wikipedia.org/wiki/Weighted_planar_stochastic_lattice |
The weighted product model ( WPM ) is a popular multi-criteria decision analysis (MCDA) / multi-criteria decision making (MCDM) method. It is similar to the weighted sum model (WSM) in that it produces a simple score, but has the very important advantage of overcoming the issue of 'adding apples and pears' i.e. addin... | https://en.wikipedia.org/wiki/Weighted_product_model |
Weighted random early detection ( WRED ) is a queueing discipline for a network scheduler suited for congestion avoidance . [ 1 ] It is an extension to random early detection (RED) where a single queue may have several different sets of queue thresholds. Each threshold set is associated to a particular traffic class .
... | https://en.wikipedia.org/wiki/Weighted_random_early_detection |
In decision theory , the weighted sum model ( WSM ), [ 1 ] [ 2 ] also called weighted linear combination ( WLC ) [ 3 ] or simple additive weighting ( SAW ), [ 4 ] is the best known and simplest multi-criteria decision analysis (MCDA) / multi-criteria decision making method for evaluating a number of alternatives in ter... | https://en.wikipedia.org/wiki/Weighted_sum_model |
The process of frequency weighting involves emphasizing the contribution of particular aspects of a phenomenon (or of a set of data ) over others to an outcome or result; thereby highlighting those aspects in comparison to others in the analysis . That is, rather than each variable in the data set contributing equally ... | https://en.wikipedia.org/wiki/Weighting |
A weighting curve is a graph of a set of factors, that are used to 'weight' measured values of a variable according to their importance in relation to some outcome. An important example is frequency weighting in sound level measurement where a specific set of weighting curves known as A- , B- , C- , and D-weighting as ... | https://en.wikipedia.org/wiki/Weighting_curve |
A weighting filter is used to emphasize or suppress some aspects of a phenomenon compared to others, for measurement or other purposes.
In each field of audio measurement, special units are used to indicate a weighted measurement as opposed to a basic physical measurement of energy level. For sound, the unit is the ph... | https://en.wikipedia.org/wiki/Weighting_filter |
In mathematics , the Weil conjecture on Tamagawa numbers is the statement that the Tamagawa number τ ( G ) {\displaystyle \tau (G)} of a simply connected simple algebraic group defined over a number field is 1. In this case, simply connected means "not having a proper algebraic covering" in the algebraic group theory s... | https://en.wikipedia.org/wiki/Weil's_conjecture_on_Tamagawa_numbers |
In mathematics , the Weil algebra of a Lie algebra g , introduced by Cartan ( 1951 ) based on unpublished work of André Weil , is a differential graded algebra given by the Koszul algebra Λ( g *)⊗ S ( g *) of its dual g *.
This algebra -related article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Weil_algebra |
In mathematics , the Weil conjectures were highly influential proposals by André Weil ( 1949 ). They led to a successful multi-decade program to prove them, in which many leading researchers developed the framework of modern algebraic geometry and number theory .
The conjectures concern the generating functions (known... | https://en.wikipedia.org/wiki/Weil_conjectures |
In arithmetic geometry , the Weil–Châtelet group or WC-group of an algebraic group such as an abelian variety A defined over a field K is the abelian group of principal homogeneous spaces for A , defined over K . John Tate ( 1958 ) named it for François Châtelet ( 1946 ) who introduced it for elliptic curves , and Andr... | https://en.wikipedia.org/wiki/Weil–Châtelet_group |
The weak mixing angle or Weinberg angle [ 2 ] is a parameter in the Weinberg–Salam theory (by Steven Weinberg and Abdus Salam ) of the electroweak interaction , part of the Standard Model of particle physics, and is usually denoted as θ W . It is the angle by which spontaneous symmetry breaking rotates the original W 0... | https://en.wikipedia.org/wiki/Weinberg_angle |
In computer security , a weird machine is a computational artifact where additional code execution can happen outside the original specification of the program. [ 1 ] It is closely related to the concept of weird instructions , which are the building blocks of an exploit based on crafted input data. [ 2 ]
The concept ... | https://en.wikipedia.org/wiki/Weird_machine |
The Weismann barrier , proposed by August Weismann , is the strict distinction between the "immortal" germ cell lineages producing gametes and "disposable" somatic cells in animals (but not plants), in contrast to Charles Darwin 's proposed pangenesis mechanism for inheritance. [ 1 ] [ 2 ]
In more precise terminology,... | https://en.wikipedia.org/wiki/Weismann_barrier |
The Weissenberg number ( Wi ) is a dimensionless number used in the study of viscoelastic flows. It is named after Karl Weissenberg . The dimensionless number compares the elastic forces to the viscous forces. It can be variously defined, but it is usually given by the relation of stress relaxation time of the fluid an... | https://en.wikipedia.org/wiki/Weissenberg_number |
The Weissman score is a performance metric for lossless compression applications. It was developed by Tsachy Weissman , a professor at Stanford University , and Vinith Misra, a graduate student, at the request of producers for HBO's television series Silicon Valley , a television show about a fictional tech start-up wo... | https://en.wikipedia.org/wiki/Weissman_score |
The Weisz–Prater criterion is a method used to estimate the influence of pore diffusion on reaction rates in heterogeneous catalytic reactions. [ 1 ] If the criterion is satisfied, pore diffusion limitations are negligible. The criterion is N W − P = R R p 2 C s D e f f ≤ 3 β {\displaystyle N_{W-P}={\dfrac {{\mathfrak ... | https://en.wikipedia.org/wiki/Weisz–Prater_criterion |
Weitao Yang ( Chinese : 杨伟涛 ; pinyin : Yáng Wěitāo ; born March 31, 1961) is a Chinese-born American chemist who is the Philip Handler Professor of Chemistry at Duke University . His main contributions to chemistry include density functional theory development, and its applications to chemistry.
Yang was born in Chaoz... | https://en.wikipedia.org/wiki/Weitao_Yang |
In mathematics , Weitzenböck's inequality , named after Roland Weitzenböck , states that for a triangle of side lengths a {\displaystyle a} , b {\displaystyle b} , c {\displaystyle c} , and area Δ {\displaystyle \Delta } , the following inequality holds:
Equality occurs if and only if the triangle is equilateral. Pedo... | https://en.wikipedia.org/wiki/Weitzenböck's_inequality |
In mathematics , in particular in differential geometry , mathematical physics , and representation theory , a Weitzenböck identity , named after Roland Weitzenböck , expresses a relationship between two second-order elliptic operators on a manifold with the same principal symbol. Usually Weitzenböck formulae are imple... | https://en.wikipedia.org/wiki/Weitzenböck_identity |
Welan gum is an exopolysaccharide used as a rheology modifier in industrial applications such as cement manufacturing. [ 1 ] It is produced by fermentation of sugar by bacteria of the genus Alcaligenes . The molecule consists of repeating tetrasaccharide units with single branches of L-mannose or L-rhamnose . [ 2 ] In ... | https://en.wikipedia.org/wiki/Welan_gum |
In mathematics , Welch bounds are a family of inequalities pertinent to the problem of evenly spreading a set of unit vectors in a vector space . The bounds are important tools in the design and analysis of certain methods in telecommunication engineering, particularly in coding theory . The bounds were originally publ... | https://en.wikipedia.org/wiki/Welch_bounds |
In statistics and uncertainty analysis , the Welch–Satterthwaite equation is used to calculate an approximation to the effective degrees of freedom of a linear combination of independent sample variances , also known as the pooled degrees of freedom , [ 1 ] [ 2 ] corresponding to the pooled variance .
For n sample var... | https://en.wikipedia.org/wiki/Welch–Satterthwaite_equation |
Weld-On is a division of IPS Corporation, a manufacturer of solvent cements , primers , and cleaners for PVC , CPVC , and ABS plastic piping systems. Weld-On products are commonly used for joining plastic pipes and fittings . Weld-On also manufactures specialty products from repair adhesives for leaking pipes, pipe thr... | https://en.wikipedia.org/wiki/Weld-On |
The weld access hole or rat hole is a structural engineering technique in which a part of the web of an I-beam or T-beam is cut out at the end or ends of the beam. The hole in the web allows a welder to weld the flange to another part of the structure with a continuous weld the full width on both top and bottom sides ... | https://en.wikipedia.org/wiki/Weld_access_hole |
A weld neck flange (also known as a high-hub flange [ 1 ] and tapered hub flange [ 2 ] ) is a type of flange . There are two designs. The regular type is used with pipes. The long type is unsuitable for pipes and is used in process plant. [ 3 ] A weld neck flange consists of a circular fitting with a protruding rim ar... | https://en.wikipedia.org/wiki/Weld_neck_flange |
Advanced thermoplastic composites (ACM) have a high strength fibres held together by a thermoplastic matrix. Advanced thermoplastic composites are becoming more widely used in the aerospace, marine, automotive and energy industry. This is due to the decreasing cost and superior strength to weight ratios, over metallic ... | https://en.wikipedia.org/wiki/Welding_of_advanced_thermoplastic_composites |
Robot welding is the use of mechanized programmable tools ( robots ), which completely automate a welding process by both performing the weld and handling the part. Processes such as gas metal arc welding , while often automated, are not necessarily equivalent to robot welding, since a human operator sometimes prepare... | https://en.wikipedia.org/wiki/Welding_robot |
The Weldon process is a process developed in 1866 by Walter Weldon for recovering manganese dioxide for re-use in chlorine manufacture. Commercial operations started at the Gamble works in St. Helens in 1869. The process is described in considerable detail in the book, The Alkali Industry, by J.R. Partington,D.Sc.
T... | https://en.wikipedia.org/wiki/Weldon_process |
Welfare biology is a proposed cross-disciplinary field of research to study the positive and negative well-being of sentient individuals in relation to their environment. Yew-Kwang Ng first advanced the field in 1995. Since then, its establishment has been advocated for by a number of writers, including philosophers, w... | https://en.wikipedia.org/wiki/Welfare_biology |
In mathematics , a well-defined expression or unambiguous expression is an expression whose definition assigns it a unique interpretation or value. Otherwise, the expression is said to be not well defined , ill defined or ambiguous . [ 1 ] A function is well defined if it gives the same result when the representation o... | https://en.wikipedia.org/wiki/Well-defined_expression |
In mathematical logic , propositional logic and predicate logic , a well-formed formula , abbreviated WFF or wff , often simply formula , is a finite sequence of symbols from a given alphabet that is part of a formal language . [ 1 ]
The abbreviation wff is pronounced "woof", or sometimes "wiff", "weff", or "whiff". [... | https://en.wikipedia.org/wiki/Well-formed_formula |
All definitions tacitly require the homogeneous relation R {\displaystyle R} be transitive : for all a , b , c , {\displaystyle a,b,c,} if a R b {\displaystyle aRb} and b R c {\displaystyle bRc} then a R c . {\displaystyle aRc.} A term's definition may require additional properties that are not listed in this table.
I... | https://en.wikipedia.org/wiki/Well-founded_induction |
A well-known URI is a Uniform Resource Identifier for URL path prefixes that start with /.well-known/ . They are implemented in webservers so that requests to the servers for well-known services or information are available at URLs consistent well-known locations across servers.
Well-known URIs are Uniform Resource Id... | https://en.wikipedia.org/wiki/Well-known_URI |
All definitions tacitly require the homogeneous relation R {\displaystyle R} be transitive : for all a , b , c , {\displaystyle a,b,c,} if a R b {\displaystyle aRb} and b R c {\displaystyle bRc} then a R c . {\displaystyle aRc.} A term's definition may require additional properties that are not listed in this table.
I... | https://en.wikipedia.org/wiki/Well-order |
In mathematics , the well-ordering principle states that every non-empty subset of nonnegative integers contains a least element . [ 1 ] In other words, the set of nonnegative integers is well-ordered by its "natural" or "magnitude" order in which x {\displaystyle x} precedes y {\displaystyle y} if and only if y {\disp... | https://en.wikipedia.org/wiki/Well-ordering_principle |
In mathematics , the well-ordering theorem , also known as Zermelo's theorem , states that every set can be well-ordered . A set X is well-ordered by a strict total order if every non-empty subset of X has a least element under the ordering. The well-ordering theorem together with Zorn's lemma are the most important ma... | https://en.wikipedia.org/wiki/Well-ordering_theorem |
All definitions tacitly require the homogeneous relation R {\displaystyle R} be transitive : for all a , b , c , {\displaystyle a,b,c,} if a R b {\displaystyle aRb} and b R c {\displaystyle bRc} then a R c . {\displaystyle aRc.} A term's definition may require additional properties that are not listed in this table.
I... | https://en.wikipedia.org/wiki/Well-quasi-ordering |
Well drainage means drainage of agricultural lands by wells. Agricultural land is drained by pumped dry wells (vertical drainage) to improve the soils by controlling water table levels and soil salinity.
Subsurface ( groundwater ) drainage for water table and soil salinity in agricultural land can be done by horizonta... | https://en.wikipedia.org/wiki/Well_drainage |
Well poisoning is the act of malicious manipulation of potable water resources in order to cause illness or death, or to deny an opponent access to fresh water resources.
Well poisoning has been historically documented as a strategy during wartime since antiquity , and was used both offensively (as a terror tactic to ... | https://en.wikipedia.org/wiki/Well_poisoning |
In hydrology , a well test is conducted to evaluate the amount of water that can be pumped from a particular water well . More specifically, a well test will allow prediction of the maximum rate at which water can be pumped from a well, and the distance that the water level in the well will fall for a given pumping ra... | https://en.wikipedia.org/wiki/Well_test |
Weller's theorem [ 1 ] is a theorem in economics . It says that a heterogeneous resource ("cake") can be divided among n partners with different valuations in a way that is both Pareto-efficient (PE) and envy-free (EF). Thus, it is possible to divide a cake fairly without compromising on economic efficiency.
Moreover,... | https://en.wikipedia.org/wiki/Weller's_theorem |
The Wellman Group is a group of manufacturing companies that make boilers and advanced defence equipment. It is one of the main boilermakers in the UK, if not the most common for large-scale industrial applications, having taken over many well-known boiler companies.
The main company began as the Wellman Smith Owen En... | https://en.wikipedia.org/wiki/Wellman_Group |
The Wellman–Lord process is a regenerable process to remove sulfur dioxide from flue gas ( flue-gas desulfurization ) without creating a throwaway sludge product.
In this process, sulfur dioxide from flue gas is absorbed in a sodium sulfite solution in water forming sodium bisulfite ; other components of flue gas are ... | https://en.wikipedia.org/wiki/Wellman–Lord_process |
The Wells effect describes an empirical disconnect between people's judgment of guilt in a trial setting, and both the mathematical and subjective probability involving guilt. This finding shows that evidence that makes a defendant's guilt more or less probable will not necessarily make a guilty verdict more or less li... | https://en.wikipedia.org/wiki/Wells_effect |
The Wells turbine is a low-pressure air turbine that rotates continuously in one direction independent of the direction of the air flow. Its blades feature a symmetrical airfoil with its plane of symmetry in the plane of rotation and perpendicular to the air stream.
It was developed for use in Oscillating Water Column... | https://en.wikipedia.org/wiki/Wells_turbine |
The Wellsite Information Transfer Specification (WITS) is a specification for the transfer of drilling rig -related data. This petroleum industry standard is recognized by a number of companies internationally and is supported by many hardware devices and software applications. [ citation needed ]
WITS is a multi-laye... | https://en.wikipedia.org/wiki/Wellsite_Information_Transfer_Specification |
Welteislehre ( WEL ; "World Ice Theory" or "World Ice Doctrine"), also known as Glazial-Kosmogonie ( Glacial Cosmogony ), is a discredited cosmological concept proposed by Hanns Hörbiger , an Austrian engineer and inventor. According to his ideas, ice was the basic substance of all cosmic processes, and ice moons, ice ... | https://en.wikipedia.org/wiki/Welteislehre |
In geometric probability theory, Wendel's theorem , named after James G. Wendel, gives the probability that N points distributed uniformly at random on an ( n − 1 ) {\displaystyle (n-1)} -dimensional hypersphere all lie on the same "half" of the hypersphere. In other words, one seeks the probability that there is some... | https://en.wikipedia.org/wiki/Wendel's_theorem |
Wender Taxol total synthesis in organic chemistry describes a Taxol total synthesis (one of six to date) by the group of Paul Wender at Stanford University published in 1997. [ 1 ] [ 2 ] This synthesis has much in common with the Holton Taxol total synthesis in that it is a linear synthesis starting from a naturally oc... | https://en.wikipedia.org/wiki/Wender_Taxol_total_synthesis |
Wendy B. Young is an advisor at Google Ventures and a former senior vice president of small molecule drug discovery at Genentech .
Young received her B.S. and M.S. from Wake Forest University , working with Prof. Huw Davies . [ 1 ] She was co-author on an early application of Davies' rhodium(II) carbenoid insertion - ... | https://en.wikipedia.org/wiki/Wendy_Young |
The Wenker synthesis is an organic reaction converting a beta amino alcohol to an aziridine with the help of sulfuric acid . It is used industrially for the synthesis of aziridine itself. [ 1 ]
The original Wenker synthesis of aziridine itself takes place in two steps. In the first step ethanolamine is reacted with s... | https://en.wikipedia.org/wiki/Wenker_synthesis |
Werner Arber (born 3 June 1929 in Gränichen , Aargau ) [ 1 ] is a Swiss microbiologist and geneticist . Along with American researchers Hamilton Smith and Daniel Nathans , Werner Arber shared the 1978 Nobel Prize in Physiology or Medicine for the discovery of restriction endonucleases . Their work would lead to the dev... | https://en.wikipedia.org/wiki/Werner_Arber |
Werner Kutzelnigg (September 10, 1933 – November 24, 2019 in Bochum ) was a prominent Austrian-born theoretical chemist and professor in the Chemistry Faculty, Ruhr-Universität Bochum , Germany .
Kutzelnigg was born in Vienna . His most significant contributions were in the following fields: relativistic quantum chemis... | https://en.wikipedia.org/wiki/Werner_Kutzelnigg |
In physics , The Werthamer–Helfand–Hohenberg (WHH) theory was proposed in 1966 by N. Richard Werthamer, Eugene Helfand and Pierre Hohenberg [ 1 ] to go beyond BCS theory of superconductivity and it provides predictions of upper critical field ( H c2 ) in type-II superconductors . [ 1 ] [ 2 ] The theory predicts the upp... | https://en.wikipedia.org/wiki/Werthamer–Helfand–Hohenberg_theory |
West is one of the four cardinal directions or points of the compass . It is the opposite direction from east and is the direction in which the Sun sets on the Earth .
The word "west" is a Germanic word passed into some Romance languages ( ouest in French, oest in Catalan, ovest in Italian, vest in Romanian, oeste in ... | https://en.wikipedia.org/wiki/West |
The West Coast Computer Faire was an annual computer industry conference and exposition most often associated with San Francisco , its first and most frequent venue. The first fair was held in 1977 and was organized by Jim Warren and Bob Reiling . At the time, it was the biggest computer show in the world, intended to ... | https://en.wikipedia.org/wiki/West_Coast_Computer_Faire |
The West Melbourne Gasworks was a coal gasification plant in West Melbourne , Victoria, Australia. [ 1 ]
Melbourne was settled in 1835 and by the early 1850s, the gold rushes had led to rapid population growth. The City of Melbourne Gas and Coke Company leased 5 acres (2 hectares) of Crown Land in 1854 to construct a ... | https://en.wikipedia.org/wiki/West_Melbourne_Gasworks |
The West PC-800 was a home computer introduced by Norwegian company West Computer AS in 1984. The computer was designed as an alarm center allowing use of several CPUs (6502, Z80, 8086, 68000) and operating systems. The company introduced an IBM PC compatible in early 1986 and the West PC-800 line was phased out.
West... | https://en.wikipedia.org/wiki/West_PC-800 |
The West number is an empirical parameter used to characterize the performance of Stirling engines and other Stirling systems. It is very similar to the Beale number where a larger number indicates higher performance; however, the West number includes temperature compensation. The West number is often used to approxima... | https://en.wikipedia.org/wiki/West_number |
The Western Ghats Ecology Expert Panel ( WGEEP ), also known as the Gadgil Commission after its chairman Madhav Gadgil , was an environmental research commission appointed by the Ministry of Environment and Forests of India. The commission submitted the report to the Government of India on 31 August 2011. The Expert Pa... | https://en.wikipedia.org/wiki/Western_Ghats_Ecology_Expert_Panel |
Several 8-bit character sets (encodings) were designed for binary representation of common Western European languages ( Italian , Spanish , Portuguese , French , German , Dutch , English , Danish , Swedish , Norwegian , and Icelandic ), which use the Latin alphabet , a few additional letters and ones with precomposed d... | https://en.wikipedia.org/wiki/Western_Latin_character_sets_(computing) |
The Western Palaearctic or Western Palearctic is part of the Palaearctic realm , one of the eight biogeographic realms dividing the Earth's surface. Because of its size, the Palaearctic is often divided for convenience into two, with Europe, North Africa, northern and central parts of the Arabian Peninsula , and part o... | https://en.wikipedia.org/wiki/Western_Palaearctic |
The Western Russian fortresses are a system of fortifications built by the Russian Empire in Eastern Europe in the early 19th century. The fortifications were constructed in three chains at strategic locations along Russia's western border, primarily to combat the threat of Prussia (later Germany ) and Austria-Hungary ... | https://en.wikipedia.org/wiki/Western_Russian_fortresses |
The Western Society of Naturalists is a scientific organization with a strong focus on promoting the study of marine biology . Most of its members are on the Pacific coast of North America . Originally established in 1910 as the Biological Society of the Pacific, it changed its name in 1916. [ 1 ] It held its first mee... | https://en.wikipedia.org/wiki/Western_Society_of_Naturalists |
The western blot (sometimes called the protein immunoblot ), or western blotting , is a widely used analytical technique in molecular biology and immunogenetics to detect specific proteins in a sample of tissue homogenate or extract. [ 1 ] Besides detecting the proteins, this technique is also utilized to visualize, di... | https://en.wikipedia.org/wiki/Western_blot |
Normalization of Western blot data is an analytical step that is performed to compare the relative abundance of a specific protein across the lanes of a blot or gel under diverse experimental treatments, or across tissues or developmental stages. [ 1 ] [ 2 ] The overall goal of normalization is to minimize effects aris... | https://en.wikipedia.org/wiki/Western_blot_normalization |
Microtus pennsylvanicus drummondii
The western meadow vole ( Microtus drummondii ) is a species of North American vole found in western North America , the midwestern United States , western Ontario, Canada , and formerly in Mexico . It was previously considered conspecific with the eastern meadow vole ( M. pennsylvan... | https://en.wikipedia.org/wiki/Western_meadow_vole |
The Westphalen–Lettré rearrangement is a classic organic reaction in organic chemistry describing a rearrangement reaction of cholestane-3β,5α,6β-triol diacetate with acetic anhydride and sulfuric acid . In this reaction one equivalent of water is lost, a double bond is formed at C10–C11 and importantly the methyl grou... | https://en.wikipedia.org/wiki/Westphalen–Lettré_rearrangement |
Wet infrastructure is the spectrum of water-related projects relating to water supply, treatment and storage, water resource management, flood management, coastal restoration, hydropower and renewable energy facilities. [ 1 ] Common examples of wet infrastructure include new construction as well as renovations and main... | https://en.wikipedia.org/wiki/Wet_infrastructure |
A wet lab , or experimental lab , is a type of laboratory where it is necessary to handle various types of chemicals and potential "wet" hazards, so the room has to be carefully designed, constructed, and controlled to avoid spillage and contamination .
A dry lab might have large experimental equipment but minimal che... | https://en.wikipedia.org/wiki/Wet_lab |
Wet nanotechnology (also known as wet nanotech ) involves working up to large masses from small ones. [ 1 ]
Wet nanotechnology requires water in which the process occurs. [ 1 ] The process also involves chemists and biologists trying to reach larger scales by putting together individual molecules. [ 1 ] While Eric Dre... | https://en.wikipedia.org/wiki/Wet_nanotechnology |
Wet oxidation is a form of hydrothermal treatment. It is the oxidation of dissolved or suspended components in water using oxygen as the oxidizer . It is referred to as wet air oxidation (WAO) when air is used. The oxidation reactions occur in superheated water at a temperature above the normal boiling point of wate... | https://en.wikipedia.org/wiki/Wet_oxidation |
A retention basin, sometimes called a retention pond, wet detention basin , or storm water management pond (SWMP), is an artificial pond with vegetation around the perimeter and a permanent pool of water in its design. [ 1 ] [ 2 ] [ 3 ] It is used to manage stormwater runoff , for protection against flooding , for eros... | https://en.wikipedia.org/wiki/Wet_pond |
Wet Processing Engineering is one of the major streams in Textile Engineering or Textile manufacturing which refers to the engineering of textile chemical processes and associated applied science . [ 1 ] The other three streams in textile engineering are yarn engineering, fabric engineering, and apparel engineering. Th... | https://en.wikipedia.org/wiki/Wet_process_engineering |
The term wet scrubber describes a variety of devices that remove pollutants from a furnace flue gas or from other gas streams. In a wet scrubber, the polluted gas stream is brought into contact with the scrubbing liquid, by spraying it with the liquid, by forcing it through a pool of liquid, or by some other contact m... | https://en.wikipedia.org/wiki/Wet_scrubber |
Wet stacking is a condition in diesel engines in which unburned fuel passes on into the exhaust system . [ 1 ] The word "stacking" comes from the term "stack" for exhaust pipe or chimney stack . The oily exhaust pipe is therefore a "wet stack".
This condition can have several causes. The most common cause is idling th... | https://en.wikipedia.org/wiki/Wet_stacking |
Wet storage stain , more commonly known as white rust or white corrosion , is a type of zinc corrosion . It is called wet storage stain because it occurs when a fresh zinc surface is stored in a wet environment with limited oxygen and carbon dioxide sources; the restriction in air is usually due to the items being stac... | https://en.wikipedia.org/wiki/Wet_storage_stain |
The wet sulfuric acid process ( WSA process ) is a gas desulfurization process. After Danish company Haldor Topsoe introduced this technology in 1987, it has been recognized as a process for recovering sulfur from various process gases in the form of commercial quality sulfuric acid (H 2 SO 4 ) with the simultaneous pr... | https://en.wikipedia.org/wiki/Wet_sulfuric_acid_process |
A wet wing (also referred to as integral fuel tanks [ 1 ] ) is an aerospace engineering technique where an aircraft's wing structure is sealed and used as a fuel tank .
The use of wet wings has become common among civilian designs, from large transport aircraft, such as airliners , to small general aviation aircraft. ... | https://en.wikipedia.org/wiki/Wet_wing |
The wetted perimeter is the perimeter of the cross sectional area that is "wet". [ 1 ] The length of line of the intersection of channel wetted surface with a cross sectional plane normal to the flow direction. The term wetted perimeter is common in civil engineering , environmental engineering , hydrology , geomorphol... | https://en.wikipedia.org/wiki/Wetted_perimeter |
In electrical and electronics engineering , wetting current is the minimum electric current needing to flow through a contact to break through the surface film resistance at a contact. [ 1 ] It is typically far below the contact's nominal maximum current rating. [ 2 ]
A thin film of oxidation, or an otherwise passivat... | https://en.wikipedia.org/wiki/Wetting_current |
Wetting solutions are liquids containing active chemical compounds that minimise the distance between two immiscible phases by lowering the surface tension to induce optimal spreading. The two phases, known as an interface , can be classified into five categories, namely, solid-solid, solid-liquid, solid-gas, liquid-li... | https://en.wikipedia.org/wiki/Wetting_solution |
A wetting transition (Cassie–Wenzel transition) may occur during the process of wetting of a solid (or liquid) surface with a liquid. The transition corresponds to a certain change in contact angle , the macroscopic parameter characterizing wetting. [ 1 ] Various contact angles can co-exist on the same solid substrate.... | https://en.wikipedia.org/wiki/Wetting_transition |
The term wetware is used to describe the protocols and molecular devices used in molecular biology and synthetic biology .
Where biological components and systems are treated in a similar manner to software , and similar development models and methodologies are applied, the term 'wetware' can be used to imply an appro... | https://en.wikipedia.org/wiki/Wetware_(biology) |
The Weyburn-Midale Carbon Dioxide Project (or IEA GHG Weyburn-Midale CO 2 Monitoring and Storage Project) was, as of 2008, the world's largest carbon capture and storage project. [ 1 ] It has since been overtaken in terms of carbon capture capacity by projects such as the Shute Creek project and the Century Plant. [ 2 ... | https://en.wikipedia.org/wiki/Weyburn-Midale_Carbon_Dioxide_Project |
In linear algebra , Weyl's inequality is a theorem about the changes to eigenvalues of an Hermitian matrix that is perturbed. It can be used to estimate the eigenvalues of a perturbed Hermitian matrix.
Let A , B {\textstyle A,B} be Hermitian on inner product space V {\textstyle V} with dimension n {\textstyle n} , wi... | https://en.wikipedia.org/wiki/Weyl's_inequality |
In number theory , Weyl's inequality , named for Hermann Weyl , states that if M , N , a and q are integers, with a and q coprime , q > 0, and f is a real polynomial of degree k whose leading coefficient c satisfies
for some t greater than or equal to 1, then for any positive real number ε {\displaystyle \scriptstyle ... | https://en.wikipedia.org/wiki/Weyl's_inequality_(number_theory) |
In relativistic cosmology , Weyl's postulate stipulates that in the Friedmann model of the universe (a fluid cosmological model), the wordlines of fluid particles (modeling galaxies) should be hypersurface orthogonal . Meaning, they should form a 3-bundle of non-intersecting geodesics orthogonal to a series of spacelik... | https://en.wikipedia.org/wiki/Weyl's_postulate |
In philosophy , Weyl's tile argument , introduced by Hermann Weyl in 1949, is an argument against the notion that physical space is "discrete", as if composed of a number of finite sized units or tiles . [ 1 ] The argument purports to show a distance function approximating Pythagoras' theorem on a discrete space cannot... | https://en.wikipedia.org/wiki/Weyl's_tile_argument |
In physics , particularly in quantum field theory , the Weyl equation is a relativistic wave equation for describing massless spin-1/2 particles called Weyl fermions . The equation is named after Hermann Weyl . The Weyl fermions are one of the three possible types of elementary fermions, the other two being the Dirac a... | https://en.wikipedia.org/wiki/Weyl_equation |
In physics , the Weyl expansion , also known as the Weyl identity or angular spectrum expansion , expresses an outgoing spherical wave as a linear combination of plane waves . In a Cartesian coordinate system , it can be denoted as [ 1 ] [ 2 ]
where k x {\displaystyle k_{x}} , k y {\displaystyle k_{y}} and k z {\displ... | https://en.wikipedia.org/wiki/Weyl_expansion |
In mathematics , the Weyl integral (named after Hermann Weyl ) is an operator defined, as an example of fractional calculus , on functions f on the unit circle having integral 0 and a Fourier series . In other words there is a Fourier series for f of the form
with a 0 = 0.
Then the Weyl integral operator of order s i... | https://en.wikipedia.org/wiki/Weyl_integral |
In general relativity , the Weyl metrics (named after the German-American mathematician Hermann Weyl ) [ 1 ] are a class of static and axisymmetric solutions to Einstein's field equation . Three members in the renowned Kerr–Newman family solutions, namely the Schwarzschild , nonextremal Reissner–Nordström and extremal ... | https://en.wikipedia.org/wiki/Weyl_metrics |
Weyl semimetals are semimetals or metals whose quasiparticle excitation is the Weyl fermion , a particle that played a crucial role in quantum field theory but has not been observed as a fundamental particle in vacuum. [ 1 ] In these materials, electrons have a linear dispersion relation, making them a solid-state anal... | https://en.wikipedia.org/wiki/Weyl_semimetal |
In mathematics , a Weyl sequence is a sequence from the equidistribution theorem proven by Hermann Weyl : [ 1 ]
The sequence of all multiples of an irrational α ,
In other words, the sequence of the fractional parts of each term will be uniformly distributed in the interval [0, 1).
In computing , an integer version ... | https://en.wikipedia.org/wiki/Weyl_sequence |
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