in chemistry below . A stationarystate is called stationary because a particle in a stationarystate ... of the state according to the Matter wave The de Broglie relations de Broglie relation . Stationary ... , which is a stationarystate if it satisfies this equation math hat H math is the Hamiltonian operator ... math is its eigenvalue. If a stationarystate math Psi rangle math is plugged into the Schr dinger ... Therefore a stationarystate is a standing wave that oscillates with an overall complex phase factor ... superposition superposition state math psi N equiv psi 0 psi 1 sqrt 2 math , which is not a stationarystate. The right column illustrates why stationary states are called stationary . As shown above, a stationarystate is not mathematically constant math Psi t rangle e iE Psi t hbar Psi 0 rangle ... orbital 1s electron in a hydrogen atom is in a stationarystate, but if the hydrogen atom reacts with another ... stationary states. But in reality, only the ground state 1s is truly stationary An electron ... into the ground state. This seems to contradict the idea that stationary states should have unchanging ... hand, the 1s state is truly a stationarystate, according to both the approximate and the true Hamiltonian ... between orbital and stationarystate . First, when there is no spin orbit coupling , there will be pairs ... principle allows two electrons per orbital, but only one electron per stationarystate. Second, an orbital is usually a wavefunction describing just one electron, even though the true stationarystate ... vacuum or vacuum state Virtual particle Steady State DEFAULTSORT StationaryState Category Quantum ... part red of the wavefunction . C,D,E,F , but not G,H , are stationary states , or standing wave s. The standing wave oscillation frequency, times Planck s constant , is the energy of the state. In quantum mechanics , a stationarystate is an eigenvector of a Hamiltonian quantum mechanics Hamiltonian . This corresponds to a quantum state with a single definite energy instead of a probability distribution ... more details
Stationary can mean wiktionarypar stationary In statistics and probability a stationary process . In mathematics a stationary point . In mathematics a stationary set . In physics a time invariant quantity, such as a constant position or temperature. In physics a steady state physical process, such as a vibration at constant amplitude and frequency or a steady fluid flow. See also Stationery , paper, office supplies and the like disambig ... more details
Stationary distribution may refer to The limiting distribution in a Markov chain Steady state analysis and limiting distributions Markov chain The marginal distribution of a stationary process or stationary time series The set of joint probability distribution s of a stationary process or stationary time series In some fields of application, the term stable distribution is used for the equivalent of a stationary marginal distribution, although in probability and statistics the term has a rather different meaning see stable distribution . Crudely stated, all of the above are specific cases of a common general concept. A stationary distribution is a specific entity which is unchanged by the effect of some matrix or operator it need not be unique. Thus stationary distributions are related to eigenvector s for which the eigenvalue is unity. See also Stationary ergodic process Perron&ndash Frobenius theorem Stationarystate or ground state in quantum mechanics Category Statistical terminology Category Stochastic processes Category Time series analysis stats stub ... more details
The term stationary phase may refer to Stationary phase biology , a phase in bacterial growth Stationary phase chemistry , a medium used in chromatography Stationary phase approximation in the evaluation of integrals in mathematics mathdab es Fase estacionaria ... more details
In probability theory &ndash specifically in the theory of stochastic process es, a stationary sequence is a random sequence whose joint probability distribution is Invariant mathematics invariant over time. If a random sequence X sub j sub is stationary then the following holds math begin align & qquad F X n,X n 1 , dots,X n N 1 x n, x n 1 , dots,x n N 1 & F X n k ,X n k 1 , dots,X n k N 1 x n, x n 1 , dots,x n N 1 , end align math where F is the joint cumulative distribution function of the random variable s in the subscript. If a sequence is stationary then it is wide sense stationary . If a sequence is stationary then it has a constant mean which may not be finite math E X n mu quad text for all n . math See also Stationary process References Probability and Random Processes with Application to Signal Processing Third Edition by Henry Stark and John W. Woods. Prentice Hall, 2002. Category Sequences and series Category Stochastic processes Category Time series analysis probability stub ... more details
In the mathematics mathematical sciences , a stationary process or strict ly stationary process or strong ly stationary process is a stochastic process whose joint probability distribution does not change ... , where the raw data are often transformed to become stationary for example, economics economic data are often seasonal and or dependent on a non stationary price level. An important type of non stationary process that does not include a trend like behavior is the cyclostationary process . Note that a stationary process is not the same thing as a process with a stationary distribution . Indeed there are further possibilities for confusion with the use of stationary in the context of stochastic ... stationary Markov chain is sometimes said to have stationary transition probabilities . Definition ... to be stationary if, for all math k math , for all math tau math , and for all math t 1, ldots, t k ... thumb right Two simulated time series processes, one stationary the other non stationary ... for the second process. As an example, white noise is stationary. The sound of a cymbal clashing, if hit only once, is not stationary because the acoustic power of the clash and hence its variance ... the cymbal is hit, such that the overall response would form a stationary process. An example of a discrete time stationary process where the sample space is also discrete so that the random variable may take one of N possible values is a Bernoulli scheme . Other examples of a discrete time stationary ... trivial autoregressive component may be either stationary or non stationary, depending on the parameter values, and important non stationary special cases are where unit root s exist in the model ... t Y qquad text for all t. math . Then X sub t sub is a stationary time series, for which ... of Y . As a further example of a stationary process for which any single realisation has an apparently ... R . math Then X sub t sub is strictly stationary. Weaker forms of stationarity Weak or wide ... more details
Image Stationary front symbol.svg thumb right The symbol of a stationary front a line with blue spikes pointing one direction, then red domes pointing the other A stationary front is a boundary between two different air mass es, neither of which is strong enough to replace the other. On a weather map, this is shown by an inter playing series of blue spikes pointing one direction and red domes pointing the other. ref http ww2010.atmos.uiuc.edu Gl guides mtr af frnts sfdef.rxml Stationary Front. ref They tend to remain essentially in the same area for extended periods of time, and waves sometimes propagate along the frontal boundary. A wide variety of weather can be found along a stationary front, but usually cloud s, prolonged precipitation meteorology precipitation , and storm train s are found there. Stationary fronts will either dissipate after several days or devolve into shear lines, but can change into a cold front cold or warm front if conditions aloft change. A stationary front becomes a shearline when the density contrast across the frontal boundary vanishes, usually as a result of temperature equalization, while the narrow zone of wind shift persists for a time. This is most common over the open ocean as the temperature of the ocean surface is usually the same on both sides of the frontal boundary and modifies the air masses on either side of it to correspond to its own temperature. See also Extratropical cyclone Surface weather analysis Weather front References reflist External links http ww2010.atmos.uiuc.edu Gl guides mtr af frnts sfdef.rxml Stationary Front. http en.wikipedia.org wiki Stationary front Category Synoptic meteorology and weather Category Weather fronts ca Front estacionari ko nl Stationair front ja pt Frente estacion ria ... more details
stationary process. Then one can use ref name Nelson Nelson, Charles R. and Plosser, Charles I. 1982 ... GDP levels trend, difference, or regime wise trend stationary? Evidence from panel data tests incorporating ... s GDP trend stationary? A measurement with theory approach. http www.wiso.uni hamburg.de fileadmin ... to show with high confidence that the variable Y is non stationary. The errors and residuals in statistics ... residuals can be statistically shown to be stationary more precisely, if one can reject the hypothesis that the true underlying errors are non stationary , then the residuals are referred ... ref and the original series Y sub t sub is said to be trend stationary even though it is not stationary ... product is characterized by stationary deviations from a trend involving a constant growth rate ... to be a stationary error process. To estimate the parameters math a math and B , one first takes ref ... text GDP t math , assuming one can reject the hypothesis that math ln U t math is non stationary ... using t and t sup 2 sup as regressors again, if the residuals are shown to be stationary then they are the detrended values of math Y t math . Other non stationary processes that are not trend stationary but can be rendered stationary Trend stationary processes are not the only kind of non stationary process that can be transformed into a stationary one another prominent such process exhibits ... more details
Image Stationary vs inflection pts.gif frame right Stationary points red pluses and inflection point s green circles . The stationary points in this graph are all relative maxima or relative minima. In mathematics , particularly in calculus , a stationary point is an input to a function mathematics function ... to the xy plane. The term is mostly used in two dimension, which this article discusses stationary ... points see there for higher dimensional discussion. Stationary point vs. critical point The term critical point is often confused with stationary point . critical point mathematics Critical point is more general a critical point is either a stationary point or a point where the derivative is not defined. A stationary point is always a critical point, but a critical point is not always a stationary ..., hence the confusion when a function is understood to be smooth, one can refer to stationary points ... does not have full rank, but is not necessarily zero this is not analogous to stationary points ... Isolated stationary points of a math C 1 math real valued function math f colon mathbf R to mathbf R math are classified into four kinds, by the first derivative test Image Stationary and inflection pts.gif frame right Saddle points coincident stationary points and inflection points . Here one is rising ... of the function is positive on both sides of the stationary point such a point marks a change ... where the derivative of the function is negative on both sides of the stationary point such a point ... or absolute maximal resp. minimal extrema. By Fermat s theorem stationary points Fermat s theorem , they must ... occur at stationary points. Curve sketching Determining the position and nature of stationary ...& 39 x 0 returns the x coordinates of all stationary points the y coordinates are trivially the function values at those x coordinates. The specific nature of a stationary point at x can in some cases be determined by examining the second derivative f & 39 x If f & 39 x 0, the stationary point at x is concave ... more details
then math S , math is called a stationary set . If a set is not stationary, then it is called a thin ... . If math S , math is a stationary set and math C , math is a club set, then their intersection math S cap C , math is also stationary. Because if math D , math is any club set, then math C cap ... C cap D , math is non empty. Therefore math S cap C , math must be stationary. See also Fodor s lemma ... math has countable cofinality. Then math S subset kappa math is stationary in math kappa math if and only ... of math kappa math is math omega aleph 0 math , then any two stationary subsets of math kappa math have stationary intersection. This is no longer the case if the cofinality of math kappa math is uncountable ... is stationary. Then math S math can be partitioned into math kappa math many disjoint stationary sets ... matrix . Jech s notion There is also a notion of stationary subset of math X lambda math , for math ... Y lambda math . This notion is due to Thomas Jech . As before, math S subset X lambda math is stationary ... in the sense that math S subset omega 1 omega math is stationary if and only if math S cap omega 1 math is stationary in math omega 1 math . The appropriate version of Fodor s lemma also holds ... math . math S subset mathcal P X math is stationary in math mathcal P X math if and only if it meets ... function for math M math , then a stationary math S math must contain an elementary substructure of math M math . In fact, math S subset mathcal P X math is stationary if and only if for any such structure ... . References Matthew Foreman, Stationary sets, Chang s Conjecture and partition theory , in Set ... links planetmath reference id 3228 title Stationary set Category Set theory Category Ordinal numbers ... more details
For Earth orbit, see Geostationary orbit . For atoms, see Fixed orbit . The term stationary orbit in celestial mechanics refers to an orbit around a planet or moon where the orbiting satellite or spacecraft remains orbiting over the same spot on the surface. From the ground, the satellite would appear to standing still, hovering above the surface in the same spot, day after day. ref name ST Space Today Online Answers To Your Questions , Spacetoday.org, 2010, webpage http www.spacetoday.org Questions PolarSats.html ST Sats . ref In practice, this is accomplished by matching the rotation, of the surface below, by reaching a particular altitude where the orbital speed almost matches the rotation below, in an equatorial orbit. ref name ST As the speed decreases slowly, then an additional boost would be needed to increase the speed back to a matching speed, or a retro rocket could be fired to slow the speed when too fast. The stationary orbit region of space is known as the Clarke Belt , named after British science fiction writer Arthur C. Clarke , who published the idea in Wireless World magazine in 1945. ref name ST A stationary orbit is sometimes referred to as a fixed orbit . Stationary Earth orbit Around the Earth , stationary satellites orbit at altitudes of approximately convert 22,300 mi km . ref name ST Writing in 1945, the science fiction author Arthur C. Clarke imagined communications satellite s as travelling in stationary orbits, where those satellites would travel around the Earth at the same speed the globe is spinning, making them hover stationary over one spot on the Earth s surface. ref name ST A satellite being propelled into place, into a stationary orbit, is first fired to a special equatorial orbit called a geostationary transfer orbit GTO . ref name ST Within this oval shaped elliptical orbit, the satellite will alternately swing out to convert 22,300 mi km 1 high and then back down to an altitude of only convert 100 mi km above the Earth 223 times ... more details
Infobox Album See Wikipedia WikiProject Albums Name Stationary Traveller Type Studio Artist Camel band Camel Cover Camel StationaryTraveller.jpg Released 1984 Recorded Riverside Studios, England, Engineer , Dave Hutchins Genre Progressive rock Length 42 14 Original 48 36 2004 Re release Label Decca Records Producer Andy Latimer Reviews Allmusic Rating 3 5 Allmusic class album id r32160 pure url yes link Last album The Single Factor br 1982 This album Stationary Traveller br 1984 Next album Pressure Points album Pressure Points br 1984 Stationary Traveller is the 10th studio album by English progressive rock band Camel band Camel . Like much of Camel s output, it is a concept album , in this case centering around the trials of East German refugees attempting to cross the Berlin Wall into West Berlin. Track listings All songs written by Susan Hoover and Andy Latimer, except where noted Original Release 1984 Side One Pressure Points instrumental small Latimer small 2 10 Refugee 3 47 Vopos 5 32 Cloak and Dagger Man 3 55 Stationary Traveller instrumental small Latimer small 5 34 Side Two West Berlin 5 10 Fingertips 4 29 Missing instrumental small Latimer small 4 22 After Words instrumental small Ton Scherpenzeel small 2 01 Long Goodbyes 5 14 Camel Productions Digital Remaster 2004 In the Arms of Waltzing Frauleins Refugee Vopos Cloak and Dagger Man Stationary Traveller West Berlin Fingertips Missing After Words Long Goodbyes Pressure Points bonus track, extended mix Personnel Andrew Latimer Andy Latimer electric guitar electric , acoustic guitar acoustic & 12 string guitar 12 string guitars, bass guitar bass , piano , drum synthesiser , flute , lead vocals Ton Scherpenzeel electronic organ organ , grand piano , Sequential Circuits Prophet 5 Prophet synthesizer , Yamaha CS80 , Juno ... Camel albums Category Decca Records albums es Stationary Traveller nl Stationary Traveller no Stationary Traveller pl Stationary Traveller fi Stationary Traveller ... more details
Unreferenced date May 2008 Infobox musical artist See Wikipedia WikiProject Musicians Name Stationary Odyssey Img Img capt Background group or band Origin Evansville, Indiana , United States USA Genre s Art rock , Post rock Years active 2002 present Label Joyful Noise Recordings URL http www.stationaryodyssey.com Official website Current members Brett Siler br Aaron Tanner Past members Stationary Odyssey is an alternative rock band from Evansville, Indiana , composed of Aaron Tanner and Brett Siler. Their debut EP, Komondor, was named one of the top 15 Most Important Releases of 2004 in Japan Duotone Records . In December 2006, Stationary Odyssey released a free, downloadable EP that contained a remix by Kramer Ween , Butthole Surfers . ref http joyfulnoiserecordings.com catalog jnr14 Terror On The Hell Loop , Stationary Odyssey, released 12 19 06 ref After touring with Frank Black in early 2007, Mike Farmer aka Kentucky Prophet lent his vocal talents on two Stationary Odyssey songs for a split EP with Child Bite Suburban Sprawl Music . ref http joyfulnoiserecordings.com catalog jnr15 Physical Education Split , Child Bite Stationary Odyssey, released 05 29 07 ref In early 2007, the band had features in both Verbicide Magazine Citation needed date April 2010 and Modern Fix . ref http modernfix.com ?page id 1376 Dead link date April 2010 ref Tanner produced a Sonic Youth tribute album, Confuse Yr Idols Narnack Records . The tribute debuted at 44 on the Canadian college charts Chartattack and 109 on the US college charts CMJ . Citation needed date April 2010 It featured a track from Stationary Odyssey as well as Elf Power , Yoshimi P we of The Boredoms Saicobab , and Steel Pole Bath Tub . ref http www.narnackrecords.com ref Members Current Brett Siler guitar, additional instrumentation Aaron Tanner bass, additional instrumentation Scott Siler drums, additional instrumentation Additional Contributors Jeff Acker Luke Bickers Nathan Brown Damon Dawson Aaron Distler Mike Farmer ... more details
for the exercise bicycle Stationary bicycle Infobox short story See Wikipedia WikiProject Novels name Stationary Bike author Stephen King country United States language English language English series n a genre Horror fiction Horror published in From the Borderlands , br Just After Sunset publication type Anthology publisher Charles Scribner s Sons Scribner media type Hardcover pub date 2003 in fiction 2003 preceded by followed by Stationary Bike is a novella written by Stephen King , which was originally published in the fifth edition of From the Borderlands in 2003. It was recently released as part of King s 2008 short story anthology, Just After Sunset . Synopsis The story opens with Richard Sifkitz, a commercial artist and widower , visiting his doctor, and staring at the results of his physical examination physical . Richard s cholesterol is dangerously high, largely due to his high fast food intake. The doctor tells him an interesting anecdote in relation to the number. He likens Richard s metabolism to a team of teamster workmen who clear the various junk food s that Richard ingests. As Richard ages, these metabolic workmen tire out and begin to slow down, resulting in heart trouble. This metaphor strikes Richard, and he becomes rather obsessed with the idea. Richard becomes determined to lose weight, and sets up a stationary bike in his basement. At first, he hangs a map of the United States on the wall, imagining himself traveling to a foreign destination with each mile. As time passes, though, the notion of the metabolic workmen enter his mind again, and he paints ... to safe levels. He is pleased, and tries to stop exercising, but cannot resist the lure of the stationary ... Stationary Bike and released on CD in June 2006. See also portal Novels Short fiction by Stephen King ... story stationary bike.html Stationary Bike at King s official site JustAfterSunset Stephen King Category 2003 short stories Category Horror short stories Category Short stories by Stephen King de Stationary ... more details
Unreferenced date March 2009 A stationary engine is an engine whose framework does not move. It is normally ... tool. They may be powered by stationary steam engine steam or oil burning or internal combustion ... station electricity generation , and powering agricultural equipment. Types of stationary engine Stationary ... stationary engines were frequently used on farm s to drive various kinds of power tool s and equipment ... fuel. Very large stationary engines ran on a heavier type of fuel oil, but this type of engine was usually .... Image LorenzStationaryEngine.jpg thumb upright Czechoslovakian Stationary Engine Initially, such engines ... power take off PTO system on tractor s, which could drive stationary equipment as well as mounted implements with much higher outputs than the average small stationary engines. For non PTO ... grid power grids , stationary engines were widely used for small scale electricity generation. Whilst ... removal systems required the provision of many pumping station s. In these, some form of stationary ... power input was required from a stationary engine for the system to work. The vast majority of these were ... fuel costs for the stationary engine. Various kinds of rack railway were developed to overcome ... of stationary engines would all have been steam powered initially. Some manufacturers of stationary ... 1898 Waterloo Gasoline Engine Company USA Witte Engine Works Preserved stationary engines In the UK there are few museums where visitors can see stationary engines in operation. Many museums have one or more engines but only a few specialise in the internal combustion stationary engines. Among these are the Internal ... for internal combustion stationary engines. These engines have been restored by private individuals ... links http www.rustyiron.com Antique Stationary Engines http www.internalfire.com Internal Fire ... Stationary engine website http www.oldengine.org members blkstone Africa.htm Stationary ... Antique engine.com Category Stationary engines Category Engines Category Engine technology ... more details
independent of time. Thus, the geometry of a stationary spacetime does not change in time. In the special ..., every static spacetime is stationary, but the converse is not generally true, as the Kerr metric provides a counterexample. In a stationary spacetime satisfying the vacuum Einstein equations math R mu ..., rotating sources produce a gravitomagnetic field which has no Newtonian analog. A stationary vacuum ... for investigating exact stationary vacuum metrics. See also Axisymmetric spacetime References references ... more details
multiple issues context November 2010 onesource November 2010 Stationary Subspace Analysis SSA ref name ... Finding Stationary Subspaces in Multivariate Time Series Phys. Rev. Letter 103, 214101. ref is a blind source separation algorithm which factorizes a multivariate time series into stationary and non stationary components. Introduction In many settings, the measured time series contains ... can be stationary or non stationary, but they are not discernible in the electrode signals, which are a mixture of these sources. SSA allows the separation of the stationary from the non stationary ... time series math x t math is assumed to be generated as a linear superposition of stationary sources math s mathfrak s t math and non stationary sources math s mathfrak n t math , math x t A s t begin ... s math and math A mathfrak n math are the basis of the stationary and non stationary subspace respectively. Given samples from the time series math x t math , the aim of Stationary Subspace Analysis is to estimate the inverse mixing matrix math A 1 math separating the stationary from non stationary sources in the mixture math x t math . Identifiability of the solution The true stationary sources math s mathfrak s t math are identifiable up to a linear transformation and the true non stationary subspace math A mathfrak n math is identifiable. The true non stationary sources math s mathfrak n t math and the true stationary subspace math A mathfrak s math cannot be identified, because arbitrary contributions from the stationary sources do not change the non stationary nature of a non stationary source ref name ssaprl Applications and Extensions Stationary Subspace Analysis has been successfully ... C, Scholler S, M ller K R. http www.ncbi.nlm.nih.gov pubmed 21096218 Finding Stationary Brain Sources ... M, M ller K R. http dx.doi.org 10.1109 ICCVW.2009.5457715 Learning Invariances with Stationary ... 4 52 Stationary Subspace Analysis as a Generalized Eigenvalue Problem Lecture Notes in Computer Science ... more details
Orphan date February 2009 Context date October 2009 Stationary Frame of Reference is used to analyse the induction motor parameters such as torque and speed. The parameter frequencies and rotational speeds are referred from a stationary observers point of view. Category Electric motors tech stub ... more details
Unreferenced date December 2009 The Digital Audio Stationary Head or DASH standard is a reel to reel , digital audio tape format introduced by Sony in early 1982 for high quality multitrack studio recording and mastering , as an alternative to analog electronics analog recording methods. DASH is capable of recording two channels of Sound audio on a quarter inch tape, and 24 or 48 tracks on convert 1 2 in mm adj mid wide tape on open reel s of up to 14 inches. The data is recorded on the tape linearly, with a stationary recording head , as opposed to the Digital Audio Tape DAT format, where data is recorded helically with a rotating head, in the same manner as a VCR . The audio data is encoded as linear pulse code modulation PCM and boasts strong cyclic redundancy check CRC error correction, allowing the tape to be physically edited with a razor blade as analog tape would, e.g. by cutting and splicing, and played back with no loss of signal. In a two track DASH recorder, the digital data is recorded onto the tape across nine data tracks eight for the digital audio data and one for the CRC data there is also provision for two linear analog cue tracks and one additional linear analog track dedicated to recording time code . The main advantage of any digital recording medium is that of consistent reproduction, which is why some of the first uses of digital recording were for instrumentation data and classical music . For audio, uncolored reproduction is not necessarily always desired, and the uneven reproduction equalization of analog recorders or the ability to record at levels ... made by Solid State Logic . Tape One significant advantage offered by DASH recorders over the analogue ... is not compatible with the only other popular open reel stationary head digital recording format, Mitsubishi ... 1982 introductions de Digital Audio Stationary Head es Digital Audio Stationary Head ru Digital Audio Stationary Head ... more details
Unreferenced date December 2009 A major stationary source is a source that emits more than a certain amount of a pollutant as defined by the United States Environmental Protection Agency U.S. Environmental Protection Agency EPA . The amount of pollutants allowed for certain new sources is defined by the EPA s New Source Performance Standard s NSPS . A stationary source in air quality terminology is any fixed emitter of air pollutants, such as fossil fuel burning power plant s, petroleum refineries , Petrochemical petrochemical plants , Food processing food processing plants and other heavy industrial sources. A mobile source in air quality terminology is a non stationary source of air pollutants, such as automobiles, buses, trucks, ships, trains, aircraft and various other vehicles. See also Air pollution dispersion terminology Atmospheric dispersion modeling AP 42 Compilation of Air Pollutant Emission Factors Lowest Achievable Emissions Rate DEFAULTSORT Major Stationary Source Category United States Environmental Protection Agency Category Air dispersion modeling ... more details
In probability theory , stationary ergodic process is a stochastic process which exhibits both stationary process stationarity and ergodic process ergodicity . In essence this implies that the random process will not change its statistical properties with time and that its statistical properties such as the theoretical mean and variance of the process can be deduced from a single, sufficiently long sample realization of the process. Stationarity is the property of a random process which guarantees that its statistical properties, such as the mean value, its moment mathematics moments and variance , will not change over time. A stationary process is one whose probability distribution is the same at all times. For more information see stationary process . Several sub types of stationarity are defined first order, second order, n th order, wide sense and strict sense. For details please see the reference below. An ergodic adjective ergodic process is one which conforms to the ergodic theorem. The theorem allows the time average of a conforming process to equal the ensemble average. In practice this means that statistical sampling can be performed at one instant across a group of identical processes or sampled over time on a single process with no change in the measured result. Please see ergodic theory and ergodic process . References Peebles,P. Z., 2001, Probability, Random Variables and Random Signal Principles , McGraw Hill Inc, Boston, ISBN 0 07 118181 4 Category Stochastic processes pl Proces ergodyczny ... more details
Image tower.bridge.99.machinery.london.arp.jpg thumb right 300px A stationary steam engine, preserved at Tower Bridge in London . This is one of two tandem cross compound hydraulic pumping engines formerly used to raise and lower the bridge. Stationary steam engines are fixed steam engine s used for pumping or driving mills and factories, and for power generation. They are distinct from locomotive engines used on Rail transport railways , traction engine s for heavy steam haulage on roads, steam ... combustion engine became more widespread. Types of stationary steam engine Image Steam engine in action.gif thumb right Double acting stationary steam engine. The piston is on the left, the Crank ... tandem compound engine Peace . There are different patterns of stationary steam engines, distinguished ... cylinder. Stationary engines may be classified by secondary characteristics as well High speed engine ... heads and exhaust ports at the midpoint. When stationary engines had multiple cylinders, they could ... Uniflow steam engine Uniflow engine Todd s 1885 Steam turbine 1889 ref harvnb Hills 1993 ref Stationary ... engines are typically coupled to ammonia compressors. Stationary engines could be classified ... Category Preserved stationary steam engines Stationary engine Boilers Steam donkey References Reflist Bibliography Buchanan, R. A., and Watkins, George, The Industrial Archaeology of the Stationary ... from Steam A History of the Stationary Steam Engine publisher Cambridge University Press, edition .... accessdate 2009 01 11 Watkins, George, Stationary Steam Engines of Great Britain , Landmark Publishing ... Old Engine House, List of Museums &ndash examples of stationary steam engines preserved ... Steam.co.uk &ndash comprehensive coverage of stationary steam engines in their original locations, working and non working, in many countries http myweb.tiscali.co.uk stationarysteam preserved stationary ... Stationary Steam Engine Category Stationary steam engines Category Steam engines Category Stationary ... more details
Infobox television bgcolour show name The Stationary Ark image caption format Nature documentary camera picture format audio format runtime 30 minutes creator developer producer executive producer starring Gerald Durrell narrated Gerald Durrell opentheme endtheme country flag Canada language English language English network first run CBC Television CBC br TVOntario TVO first aired 16 September 1975 last aired 9 December 1975 num episodes 13 list episodes website The Stationary Ark was a documentary television miniseries hosted by Zoology zoologist Gerald Durrell on location at his Jersey Zoological Park in the United Kingdom . It was based on his 1976 book of the same name. The series was produced by Canadian company Nielsen Ferns and aired from September to December 1975 on CBC Television and TVOntario . Ark on the Move TV series Ark on the Move , a follow up TV series, was also hosted by Gerald Durrell. Theme Song The theme to Stationary Ark became popularized in the mid 80s with a cover version released by Georg Feil http www.scenemusic.net songinfo.php?songid 17677 for the Commodore 64 and its MOS Technology SID SID chip . External links http www.film.queensu.ca Lasso Lasso.acgi? 5bdatabase 5d cbcdirectory& 5blayout 5d layout 20 231& 5bresponse 5d cbc 2fdetailformat.html& 5brecid 5d 32974& 5bsearch 5d Queen s University Directory of CBC Television Series The Stationary Ark , accessed 28 September 2006 Gerald Durrell Use dmy dates date September 2010 DEFAULTSORT Stationary Ark Category CBC network shows Category TVOntario shows Category Nature educational television series Category Television series about animals Canada tv prog stub ... more details
Stationary fuel cell applications or stationary fuel cell power systems are stationary Not moving fuel cell Applied science applications that are either connected to the electric grid distributed generation to provide supplemental power and as emergency power system for critical areas, or installed as a grid independent generator for on site service. Codes and standards Stationary fuel cell applications is a classification in FC Hydrogen codes and standards and fuel cell codes and standards. The other main standards are Portable fuel cell applications and Fuel cell vehicle . Fuel cell gas appliances up to 70 kW Installation permitting guidance for hydrogen and fuel cells stationary applications Standard for the installation of stationary fuel cell power systems Applications More than 2500 fuel cell systems have been installed all over the world in hospitals, nursing homes, hotels, office buildings, schools, utility power plants Emergency Emergency power systems Emergency power systems are a type fuel cell system, which may include lighting, generators and other apparatus, to provide backup resources in a crisis or when regular systems fail. They find uses in a wide variety of settings from residential homes to hospital s, scientific laboratories, data center s ref http www.t systems.com tsi servlet content t systems.de en 228788 Fuel cell in the data center Munich ref , telecommunication ref http www.fuelcellsworks.com Supppage9369.html India orders 10.000 fuel cell emergency power systems ref equipment and modern naval ships. Uninterrupted power supply An uninterrupted power supply UPS provides emergency power and, depending on the topology, provide line regulation as well to connected equipment by supplying power from a separate source when utility power is not available. It differs from an auxiliary power supply or standby generator, which does not provide instant protection from a momentary power interruption. Cogeneration Cogeneration can be used when the fuel cell ... more details
File Stationary wavelet transform lena.png thumb Haar Stationary Wavelet Transform of Lena Context date October 2009 The Stationary wavelet transform SWT ref James E. Fowler http ieeexplore.ieee.org iel5 97 32130 01495429.pdf?arnumber 1495429 The Redundant Discrete Wavelet Transform and Additive Noise , contains an overview of different names for this transform. ref is a wavelet transform algorithm designed to overcome the lack of translation invariance of the discrete wavelet transform DWT . Translation invariance is achieved by removing the downsamplers and upsamplers in the DWT and upsampling the filter coefficients by a factor of math 2 j 1 math in the math j math th level of the algorithm ref Mark J. Shensa, The Discrete Wavelet Transform Wedding the A Trous and Mallat Algorithms, IEEE Transaction on Signal Processing, Vol 40, No 10, Oct. 1992. ref . The SWT is an inherently redundant scheme as the output of each level of SWT contains the same number of samples as the input so for a decomposition of N levels there is a redundancy of N in the wavelet coefficients. This algorithm is more famously known as algorithme trous in French word trous means holes in English what refers to inserting zeros in the filters. It was introduced by Holdschneider et al. ref M. Holschneider, R. Kronland Martinet, J. Morlet and P. Tchamitchian. A real time algorithm for signal analysis with the help of the wavelet transform. In Wavelets, Time Frequency Methods and Phase Space , pp. 289 297. Springer Verlag, 1989. ref Implementation The following block diagram depicts the digital implementation of SWT. Image Wavelets SWT Filter Bank.png frame none A 3 level SWT filter bank In the above diagram, filters in each level are up sampled versions of the previous see figure below . Image Wavelets SWT Filters.png frame none SWT filters Applications A few applications of SWT are specified below ... names. Stationary wavelet transform Redundant wavelet transform Algorithme trous Quasi continuous ... more details
Encyclopedia
top
