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  2. Population dynamics of fisheries - Wikipedia

    en.wikipedia.org/wiki/Population_dynamics_of...

    This makes prediction difficult. [13] The recruitment problem is the problem of predicting the number of fish larvae in one season that will survive and become juvenile fish in the next season. It has been called "the central problem of fish population dynamics" [14] and “the major problem in fisheries science". [15]

  3. Boston Dynamics - Wikipedia

    en.wikipedia.org/wiki/Boston_Dynamics

    On June 16, 2020 Boston Dynamics made Spot available for the general public to purchase at a price of US$74,500 (equivalent to $87,710 in 2023). [ 44 ] On June 23, 2020, a lone Spot named 'Zeus' was used by SpaceX at their Boca Chica Starship Test Site to help contain sub-cooled liquid nitrogen and to inspect 'potentially dangerous' sites at ...

  4. Markov model - Wikipedia

    en.wikipedia.org/wiki/Markov_model

    Markov-chains have been used as a forecasting methods for several topics, for example price trends, [8] wind power [9] and solar irradiance. [10] The Markov-chain forecasting models utilize a variety of different settings, from discretizing the time-series [ 9 ] to hidden Markov-models combined with wavelets [ 8 ] and the Markov-chain mixture ...

  5. Random walk hypothesis - Wikipedia

    en.wikipedia.org/wiki/Random_walk_hypothesis

    The closing stock price for each day was determined by a coin flip. If the result was heads, the price would close a half point higher, but if the result was tails, it would close a half point lower. Thus, each time, the price had a fifty-fifty chance of closing higher or lower than the previous day. Cycles or trends were determined from the tests.

  6. General Dynamics UK - Wikipedia

    en.wikipedia.org/wiki/General_Dynamics_UK

    General Dynamics UK is the British subsidiary of the American defence and security corporation General Dynamics. Founded in London in 1962, the company has grown to include eight sites across the United Kingdom , including in Bristol , Chippenham , Hastings , Merthyr Tydfil , Oakdale and Rotherham .

  7. System dynamics - Wikipedia

    en.wikipedia.org/wiki/System_dynamics

    System dynamics is a methodology and mathematical modeling technique to frame, understand, and discuss complex issues and problems. Originally developed in the 1950s to help corporate managers improve their understanding of industrial processes, SD is currently being used throughout the public and private sector for policy analysis and design.

  8. General Atomics MQ-20 Avenger - Wikipedia

    en.wikipedia.org/wiki/General_Atomics_MQ-20_Avenger

    In October 2017, General Atomics released images of its submission for the Navy's MQ-25 Stingray, an unmanned aerial tanker that formed out of the UCLASS effort. The aircraft is an Avenger-based wing-body-tail design with a standard D-704 buddy tank refueling system that has an electro-optical ball like the Predator and Reaper, landing gear ...

  9. Bullwhip effect - Wikipedia

    en.wikipedia.org/wiki/Bullwhip_effect

    Because forecast errors are given, companies often carry an inventory buffer called "safety stock". Moving up the supply chain from end-consumer to raw materials supplier, each supply chain participant has greater observed variation in demand and thus greater need for safety stock. In periods of rising demand, down-stream participants increase ...