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5 天前 · Bitcoin (abbreviation: BTC; sign: ) is the first decentralized cryptocurrency. Nodes in the peer-to-peer bitcoin network verify transactions through cryptography and record them in a public distributed ledger, called a blockchain, without central oversight. Consensus between nodes is achieved using a computationally intensive process based on proof of work, called mining, that guarantees the ...
2024年5月23日 · The moment of inertia, otherwise known as the mass moment of inertia, angular/rotational mass, second moment of mass, or most accurately, rotational inertia, of a rigid body is a quantity that determines the torque needed for a desired angular acceleration about a rotational axis, akin to how mass determines the force needed for a desired acceleration.
1 天前 · Romania[a] is a country located at the crossroads of Central, Eastern and Southeastern Europe.[15][16][17] It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to the east, and the Black Sea to the southeast. It has a predominantly continental climate, and an area of 238,397 km2 ...
1 天前 · Evolution of Unix systems Unix was originally written in assembly language. Ken Thompson wrote B, mainly based on BCPL, based on his experience in the MULTICS project. B was replaced by C, and Unix, rewritten in C, developed into a large, complex family of inter-related operating systems which have been influential in every modern operating system (see History).
2024年5月22日 · The Internet of things (IoT) describes devices with sensors, processing ability, software and other technologies that connect and exchange data with other devices and systems over the Internet or other communications networks.[1][2][3][4][5] The Internet of things encompasses electronics, communication, and computer science engineering ...
4 天前 · Early proposals in Panama Satellite image showing the location of the Panama Canal: dense jungles are visible in green, topped by clouds. The earliest record regarding a canal across the Isthmus of Panama was in 1534, when Charles V, Holy Roman Emperor and King of Spain, ordered a survey for a route through the Americas in order to ease the voyage for ships traveling between Spain and Peru.
2 天前 · The first set of data on the left columns of the table includes estimates for the year 2023 made for each economy of the 196 economies (189 U.N. member states and 7 areas of Aruba, Hong Kong, Kosovo, Macau, Palestine, Puerto Rico, and Taiwan) covered by the International Monetary Fund (IMF)'s International Financial Statistics (IFS) database.
