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Qu'est-ce (qui) est optimal observation - définition
CLASS OF MATHEMATICAL PROBLEMS CONCERNED WITH CHOOSING AN OPTIMAL TIME TO TAKE A PARTICULAR ACTION
Optimal Stopping; Optimal Stopping problem
Bonilla observation
FIRST SIGHTING OF UNIDENTIFIED FLYING OBJECTS
Jose Bonilla Observation; José Bonilla Observation
On August 12, 1883, the astronomer José Bonilla reported that he saw more than 300 dark, unidentified objects crossing before the Sun while observing sunspot activity at Zacatecas Observatory in Mexico. He was able to take several photographs, exposing wet plates at 1/100 second.
lunar observation
![[[Shadow]]s provide a sense of depth.](https://commons.wikimedia.org/wiki/Special:FilePath/ComputerHotline - Grande-lune (by).JPG?width=200 "[[Shadow]]s provide a sense of depth.")
![[[Earthshine]] reflecting off the Moon. The bright region at left is directly illuminated by sunlight, while the rest of the Moon is faintly lit by sunlight reflected off the Earth.](https://commons.wikimedia.org/wiki/Special:FilePath/Earthshine Karonen.jpg?width=200 "[[Earthshine]] reflecting off the Moon. The bright region at left is directly illuminated by sunlight, while the rest of the Moon is faintly lit by sunlight reflected off the Earth.")
![crater]]s labeled](https://commons.wikimedia.org/wiki/Special:FilePath/Moon names.svg?width=200 "crater]]s labeled")
METHODS AND INSTRUMENTS USED TO OBSERVE THE MOON
Observing the moon; Moon observation; Observing the Moon
¦ noun the measurement of longitude by lunar distance.
Lunar observation
METHODS AND INSTRUMENTS USED TO OBSERVE THE MOON
Observing the moon; Moon observation; Observing the Moon
The Moon is the largest natural satellite of and the closest major astronomical object to Earth. The Moon may be observed by using a variety of optical instruments, ranging from the naked eye to large telescopes.
Wikipédia
Optimal stopping
In mathematics, the theory of optimal stopping or early stopping is concerned with the problem of choosing a time to take a particular action, in order to maximise an expected reward or minimise an expected cost. Optimal stopping problems can be found in areas of statistics, economics, and mathematical finance (related to the pricing of American options). A key example of an optimal stopping problem is the secretary problem. Optimal stopping problems can often be written in the form of a Bellman equation, and are therefore often solved using dynamic programming.
