Loess (/ˈloʊ.əs/, /ˈlʌs/, /ˈlɛs/, or UK/ˈlɜːrs/; from German Löss [lœs]) is a clastic, predominantly silt-sized sediment that is formed by the accumulation of wind-blown dust. It covers about 10% of the Earth's surface.
Loess is an aeolian sediment formed by the accumulation of wind-blown silt, typically in the 20–50 micrometer size range, twenty percent or less clay and the balance equal parts sand and silt that are loosely cemented by calcium carbonate. It is usually homogeneous and highly porous and is traversed by vertical capillaries that permit the sediment to fracture and form vertical bluffs.
The word loess, with connotations of origin by wind-deposited accumulation, came into English from GermanLöss ([lœs]), which can be traced back to Swiss German and is cognate with the English word loose and the German word los. It was first applied to Rhine River valley loess about 1821.
LOESS and LOWESS (locally weighted scatterplot smoothing) are two strongly related non-parametric regression methods that combine multiple regression models in a k-nearest-neighbor-based meta-model. "LOESS" is a later generalization of LOWESS; although it is not a true initialism, it may be understood as standing for "LOcal regrESSion".
LOESS and LOWESS thus build on "classical" methods, such as linear and nonlinear least squares regression. They address situations in which the classical procedures do not perform well or cannot be effectively applied without undue labor. LOESS combines much of the simplicity of linear least squares regression with the flexibility of nonlinear regression. It does this by fitting simple models to localized subsets of the data to build up a function that describes the deterministic part of the variation in the data, point by point. In fact, one of the chief attractions of this method is that the data analyst is not required to specify a global function of any form to fit a model to the data, only to fit segments of the data.
Animations are used to walk you through how the Localized Regression technique works so you better understand when or when not to use it.
Code used to produce animations: https://github.com/TheActuarialDataScientist/LOESS/blob/main/Plot%20Examples.R
The Actuarial Data Scientist Merch:
https://merch.streamelements.com/theactuarialdatascientist
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▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
0:00 Polynomial Comparison
2:35 LOESS Algorithm
5:41 Bias-Variance Tradeoff
10:02 Pros & Cons
12:45 Interaction Example
15:33 kNN
▬▬▬▬▬▬▬▬▬▬ Music ▬▬▬▬▬▬▬▬▬▬
- Artist Attribution
Music By: "KaizanBlu"
Track Name: "Remember"
Link: https://www.youtube.com/watch?v=YLyKJ1Gyu9E&list=PL06diOotXAJIGYr4PVLSCC4WIz-1VR1UT...
published: 14 Nov 2020
Amazing China: ‘A Land Formed by the Blowing Dust’- Loess Plateau| CCTV English
The Earth is a place of endless wonder, where landscapes are often created from mere dust. The Loess Plateau is such a place. #AmazingChina
published: 28 Sep 2019
The Loess Plateau | World of Trees: Ep. 7
Knovva Academy is a pioneering academic institution serving secondary schools around the world. See our learning offerings and read our mission at: https://knovva.com/
How do trees nourish the desert?
The Loess Plateau in northern China, home to 50 million people, was once good farmland. Over time, after farmers cut down trees for wood and fuel, this naturally dry area became a barren desert. Farms produced little, and people were hungry. In the 1990s, experts came up with a plan: planting trees. These terraced trees caught the rainwater so it could feed crops for months instead of flowing away in a day. By planting trees, farmers could harvest food year-round.
WEBSITE: https://knovva.com/
INSTAGRAM: http://instagram.com/knovva_academy
TWITTER: http://twitter.com/knovva_academy
Joi...
Animations are used to walk you through how the Localized Regression technique works so you better understand when or when not to use it.
Code used to produce...
Animations are used to walk you through how the Localized Regression technique works so you better understand when or when not to use it.
Code used to produce animations: https://github.com/TheActuarialDataScientist/LOESS/blob/main/Plot%20Examples.R
The Actuarial Data Scientist Merch:
https://merch.streamelements.com/theactuarialdatascientist
Earn yourself (and me :) a free stock by joining RobinHood!
tiny.cc/JoinRobinHood
▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
0:00 Polynomial Comparison
2:35 LOESS Algorithm
5:41 Bias-Variance Tradeoff
10:02 Pros & Cons
12:45 Interaction Example
15:33 kNN
▬▬▬▬▬▬▬▬▬▬ Music ▬▬▬▬▬▬▬▬▬▬
- Artist Attribution
Music By: "KaizanBlu"
Track Name: "Remember"
Link: https://www.youtube.com/watch?v=YLyKJ1Gyu9E&list=PL06diOotXAJIGYr4PVLSCC4WIz-1VR1UT&index=3&ab_channel=ChillOutRecords-NoCopyrightMusic
Animations are used to walk you through how the Localized Regression technique works so you better understand when or when not to use it.
Code used to produce animations: https://github.com/TheActuarialDataScientist/LOESS/blob/main/Plot%20Examples.R
The Actuarial Data Scientist Merch:
https://merch.streamelements.com/theactuarialdatascientist
Earn yourself (and me :) a free stock by joining RobinHood!
tiny.cc/JoinRobinHood
▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
0:00 Polynomial Comparison
2:35 LOESS Algorithm
5:41 Bias-Variance Tradeoff
10:02 Pros & Cons
12:45 Interaction Example
15:33 kNN
▬▬▬▬▬▬▬▬▬▬ Music ▬▬▬▬▬▬▬▬▬▬
- Artist Attribution
Music By: "KaizanBlu"
Track Name: "Remember"
Link: https://www.youtube.com/watch?v=YLyKJ1Gyu9E&list=PL06diOotXAJIGYr4PVLSCC4WIz-1VR1UT&index=3&ab_channel=ChillOutRecords-NoCopyrightMusic
Knovva Academy is a pioneering academic institution serving secondary schools around the world. See our learning offerings and read our mission at: https://knov...
Knovva Academy is a pioneering academic institution serving secondary schools around the world. See our learning offerings and read our mission at: https://knovva.com/
How do trees nourish the desert?
The Loess Plateau in northern China, home to 50 million people, was once good farmland. Over time, after farmers cut down trees for wood and fuel, this naturally dry area became a barren desert. Farms produced little, and people were hungry. In the 1990s, experts came up with a plan: planting trees. These terraced trees caught the rainwater so it could feed crops for months instead of flowing away in a day. By planting trees, farmers could harvest food year-round.
WEBSITE: https://knovva.com/
INSTAGRAM: http://instagram.com/knovva_academy
TWITTER: http://twitter.com/knovva_academy
Join our growing community by subscribing!
Knovva Academy is a pioneering academic institution serving secondary schools around the world. See our learning offerings and read our mission at: https://knovva.com/
How do trees nourish the desert?
The Loess Plateau in northern China, home to 50 million people, was once good farmland. Over time, after farmers cut down trees for wood and fuel, this naturally dry area became a barren desert. Farms produced little, and people were hungry. In the 1990s, experts came up with a plan: planting trees. These terraced trees caught the rainwater so it could feed crops for months instead of flowing away in a day. By planting trees, farmers could harvest food year-round.
WEBSITE: https://knovva.com/
INSTAGRAM: http://instagram.com/knovva_academy
TWITTER: http://twitter.com/knovva_academy
Join our growing community by subscribing!
Animations are used to walk you through how the Localized Regression technique works so you better understand when or when not to use it.
Code used to produce animations: https://github.com/TheActuarialDataScientist/LOESS/blob/main/Plot%20Examples.R
The Actuarial Data Scientist Merch:
https://merch.streamelements.com/theactuarialdatascientist
Earn yourself (and me :) a free stock by joining RobinHood!
tiny.cc/JoinRobinHood
▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
0:00 Polynomial Comparison
2:35 LOESS Algorithm
5:41 Bias-Variance Tradeoff
10:02 Pros & Cons
12:45 Interaction Example
15:33 kNN
▬▬▬▬▬▬▬▬▬▬ Music ▬▬▬▬▬▬▬▬▬▬
- Artist Attribution
Music By: "KaizanBlu"
Track Name: "Remember"
Link: https://www.youtube.com/watch?v=YLyKJ1Gyu9E&list=PL06diOotXAJIGYr4PVLSCC4WIz-1VR1UT&index=3&ab_channel=ChillOutRecords-NoCopyrightMusic
Knovva Academy is a pioneering academic institution serving secondary schools around the world. See our learning offerings and read our mission at: https://knovva.com/
How do trees nourish the desert?
The Loess Plateau in northern China, home to 50 million people, was once good farmland. Over time, after farmers cut down trees for wood and fuel, this naturally dry area became a barren desert. Farms produced little, and people were hungry. In the 1990s, experts came up with a plan: planting trees. These terraced trees caught the rainwater so it could feed crops for months instead of flowing away in a day. By planting trees, farmers could harvest food year-round.
WEBSITE: https://knovva.com/
INSTAGRAM: http://instagram.com/knovva_academy
TWITTER: http://twitter.com/knovva_academy
Join our growing community by subscribing!
Loess (/ˈloʊ.əs/, /ˈlʌs/, /ˈlɛs/, or UK/ˈlɜːrs/; from German Löss [lœs]) is a clastic, predominantly silt-sized sediment that is formed by the accumulation of wind-blown dust. It covers about 10% of the Earth's surface.
Loess is an aeolian sediment formed by the accumulation of wind-blown silt, typically in the 20–50 micrometer size range, twenty percent or less clay and the balance equal parts sand and silt that are loosely cemented by calcium carbonate. It is usually homogeneous and highly porous and is traversed by vertical capillaries that permit the sediment to fracture and form vertical bluffs.
The word loess, with connotations of origin by wind-deposited accumulation, came into English from GermanLöss ([lœs]), which can be traced back to Swiss German and is cognate with the English word loose and the German word los. It was first applied to Rhine River valley loess about 1821.
Scientists make alarming discovery after studying polar bear blood samples. 'Things are changing'. The results confirmed the researchers' fears. The CoolDown. Watch. Orca launches 20 feet high while pursuing prey off San Diego... PetHelpful.
The Stewardship Committee of the Loess HillsAlliance is soliciting proposals that protect, preserve and enhance the fragile native ecosystems of the Loess Hills for the future of the area ... .
The LoHi Trek, an annual multi-day hiking and camping excursion in western Iowa’s unique Loess Hills, took place Oct. 17 through Oct. 20 in Mills and Fremont counties ... .
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