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Powells Run
Powells or Powell's may refer to: Places * Powell Islands (Powells), Raa Atoll, Maldives Cities, towns, communities * Powells Corners, Ontario, Canada United States * Powells Crossroads, Tennessee * Powells Point, North Carolina * Powellton, California, formerly called Powell's Ranch Watercourses, rivers, creeks * Powell's Creek (Prince George County, Virginia), United States * Powells Creek, a river in Prince William County, Virginia, United States * Powells Creek (Sydney), Australia Mathematics * Powell's method, an algorithm for finding a local minimum of a function * Powell's dog leg method, an iterative optimization Other uses * Powell's Books, a bookstore chain in Portland, Oregon, United States See also * * * Powell (other) Powell may refer to: People * Powell (surname) * Powell (given name) * Powell baronets, several baronetcies *Colonel Powell (other), several military officers *General Powell (other), several military leaders * Gover ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powell Islands
Alifushi (Dhivehi: އަލިފުށި) is one of the inhabited islands of Raa Atoll in the Maldives. History Powell Islands Alifushi and Etthingili were named as the Powell Islands by Captain Robert Moresby after Lieutenant F.F. Powell, who assisted during the difficult survey of the Atolls of the Maldives in 1834–36. Later promoted to captain, Powell went on to survey the northwest coast of Ceylon. Geography Alifushi and Etthingili (Powell Islands in the Admiralty Chart) stand on a detached reef of their own with very deep waters (no sounding), between this isolated reef shelf and the northern end of the main Northern Maalhosmadulhu Atoll. Alifushi is north of the country's capital, Malé Malé (, ; dv, މާލެ) is the capital and most populous city of the Maldives. With a population of 252,768 and an area of , it is also one of the most densely populated cities in the world. The city is geographically located at the southern .... Demography Economy This island ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powells Corners, Ontario
Powells or Powell's may refer to: Places * Powell Islands (Powells), Raa Atoll, Maldives Cities, towns, communities * Powells Corners, Ontario, Canada United States * Powells Crossroads, Tennessee * Powells Point, North Carolina * Powellton, California, formerly called Powell's Ranch Watercourses, rivers, creeks * Powell's Creek (Prince George County, Virginia), United States * Powells Creek, a river in Prince William County, Virginia, United States * Powells Creek (Sydney), Australia Mathematics * Powell's method, an algorithm for finding a local minimum of a function * Powell's dog leg method, an iterative optimization Other uses * Powell's Books, a bookstore chain in Portland, Oregon, United States See also * * * Powell (other) Powell may refer to: People * Powell (surname) * Powell (given name) * Powell baronets, several baronetcies *Colonel Powell (other), several military officers *General Powell (other), several military leaders * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powells Crossroads, Tennessee
Powells Crossroads is a town in Marion County, Tennessee, United States. The population was 1,322 at the 2010 census, up from 1,286 in 2000. It is part of the Chattanooga, TN- GA Metropolitan Statistical Area. Geography Powells Crossroads is located at (35.183526, -85.482900). It is situated in the Sequatchie Valley around the intersection of State Route 283 and State Route 27. Whitwell lies just to the west, opposite the Sequatchie River. Walden Ridge, much of it protected by Prentice Cooper State Forest, rises prominently to the east. According to the United States Census Bureau, the town has a total area of , all land. Demographics As of the census of 2000, there were 1,286 people, 485 households, and 392 families residing in the town. The population density was . There were 509 housing units at an average density of . The racial makeup of the town was 99.22% White, 0.16% African American, 0.08% Native American, 0.08% Asian, 0.08% from other races, and 0.39% from two ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powells Point, North Carolina
Powells Point is an unincorporated community in Currituck County, North Carolina North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia and ..., United States. It lies at an elevation of 10 feet (3 m). References * Named after Hobson Powell, original member of the Jamestown colony. Unincorporated communities in Currituck County, North Carolina Unincorporated communities in North Carolina {{CurrituckCountyNC-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powellton, California
Powellton was an unincorporated community in Butte County, California Butte County () is a county located in the northern part of the U.S. state of California. In the 2020 census, its population was 211,632. The county seat is Oroville. Butte County comprises the Chico, CA metropolitan statistical area. It is ..., USA. It lies at an elevation of 3,622 feet (1,104 m). The place is named for R.P. Powell who arrived in 1853. Originally Powell's Ranch, it was renamed when a post office was established in 1872; the office closed in 1906. It was a center of lumber production in its heyday, but nothing remains at the site. References {{authority control Former settlements in Butte County, California ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powell's Creek (Prince George County, Virginia)
Powell's Creek is a tributary of the James River on the south side of the James River in Prince George County, Virginia, United States. The creek borders James River National Wildlife Refuge near Garysville, Virginia. History In 1730, a tobacco inspection site was located here. According to the Tobacco Inspection Act, the inspection was "In Prince George; at Appamatox Point, upon Col. Bolling's land; on Col. Robert Mumford's land; and Powel's Creek; upon Mr. Bland's land, under one inspection." According to a State of Virginia historical marker, "The creek ... was named for Nathaniel Powell, acting governor in 1619. Weyanoke Indian town was here. Nearby was the site of an old mill, known in the Revolution as Bland's, and later, Cocke's Mill. The British General Phillips passed here May, 1781. Here Grant Grant or Grants may refer to: Places *Grant County (other) Australia * Grant, Queensland, a locality in the Barcaldine Region, Queensland, Australia U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prince William County
Prince William County is located on the Potomac River in the U.S. state of Virginia. As of the 2020 census, the population sits at 482,204, making it Virginia's second-most populous county. Its county seat is the independent city of Manassas. A part of Northern Virginia, Prince William County is part of the Washington metropolitan area. In 2019 it had the 20th-highest income of any county in the United States. History At the time of European colonization, the native tribes of the area that would become Prince William County were the Doeg, an Algonquian-speaking sub-group of the Powhatan tribal confederation. When John Smith and other English explorers ventured to the upper Potomac River beginning in 1608, they recorded the name of a village the Doeg inhabited as ''Pemacocack'' (meaning "plenty of fish" in their language). It was located on the west bank of the Potomac River about 30 miles south of present-day Alexandria. Unable to deal with European diseases and firepow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powells Creek (Sydney)
Powells Creek, a southern tributary of the Parramatta River, is an urban stream west of Sydney Harbour, located in Sydney, Australia. It flows through Sydney Olympic Park and joins Parramatta River at Homebush Bay. Ecology Powells Creek begins as a concrete stormwater channel in the inner-western suburb of Strathfield, and flows north-west between the suburbs of Homebush and North Strathfield, past Bressington Park, where it joins Saleyards Creek. Beyond this point its concrete walls do not continue, and it becomes a mangrove-lined stream, flowing through Bicentennial Park and emptying into Homebush Bay. In 2008 the City of Canada Bay called for community responses to the Powells Creek Renewal Project, that intended to improve the appearance of the creek upstream of the confluence with Saleyards Creek. Canalisation of Powells Creek and Saleyards Creek in the 1930s affected salinity and pollution levels in nearby tidal wetlands. A drop board weir installed in 1998 has partly r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powell's Method
Powell's method, strictly Powell's conjugate direction method, is an algorithm proposed by Michael J. D. Powell for finding a local minimum In mathematical analysis, the maxima and minima (the respective plurals of maximum and minimum) of a function, known collectively as extrema (the plural of extremum), are the largest and smallest value of the function, either within a given ra ... of a function. The function need not be differentiable, and no derivatives are taken. The function must be a real-valued function of a fixed number of real-valued inputs. The caller passes in the initial point. The caller also passes in a set of initial search vectors. Typically ''N'' search vectors (say \) are passed in which are simply the normals aligned to each axis. The method minimises the function by a bi-directional search along each search vector, in turn. The bi-directional line search along each search vector can be done by Golden-section search or Brent's method. Let the minima fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powell's Dog Leg Method
Powell's dog leg method, also called Powell's hybrid method, is an iterative optimisation algorithm for the solution of non-linear least squares problems, introduced in 1970 by Michael J. D. Powell.Powell (1970) Similarly to the Levenberg–Marquardt algorithm, it combines the Gauss–Newton algorithm with gradient descent, but it uses an explicit trust region. At each iteration, if the step from the Gauss–Newton algorithm is within the trust region, it is used to update the current solution. If not, the algorithm searches for the minimum of the objective function along the steepest descent direction, known as Cauchy point. If the Cauchy point is outside of the trust region, it is truncated to the boundary of the latter and it is taken as the new solution. If the Cauchy point is inside the trust region, the new solution is taken at the intersection between the trust region boundary and the line joining the Cauchy point and the Gauss-Newton step (dog leg step).Yuan (2000) The name o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powell's Books
Powell's Books is a chain of bookstores in Portland, Oregon, and its surrounding metropolitan area. Powell's headquarters, dubbed Powell's City of Books, claims to be the largest independent new and used bookstore in the world. Powell's City of Books is located in the Pearl District on the edge of downtown and occupies a full city block between NW 10th and 11th Avenues and between W. Burnside and NW Couch Streets. It contains over , about 1.6 acres of retail floor space. In 2016, CNN rated it one of the "coolest" bookstores in the world. The City of Books has nine color-coded rooms and over 3,500 different sections. The inventory for its retail and online sales is over four million new, used, rare, and out-of-print books. As of 2009, Powell's was buying around 3,000 used books a day. History 20th century Powell's was founded by Walter Powell in 1971. His son, Michael Powell, had started a bookstore in Chicago, Illinois, in 1970 which specialized in used, rare, and discounte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
