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Renogy
Renogy (如果新能源) is an American renewable energy company founded in 2010 as a student project at Louisiana State University, making solar panels, lithium batteries, and portable power stations.
RenovaBio
RenovaBio, Brazil's National Biofuel Policy established by Law No. 13,576 in 2017, promotes biofuels through emissions targets, certification, and CBIO decarbonization credits traded on the B3 exchange.
Renovation Wave
The Renovation Wave is a European Commission strategy, launched in October 2020, to double the EU's annual building renovation rate and renovate 35 million units by 2030.
Renown-class battlecruiser
The Renown class was a pair of Royal Navy battlecruisers, HMS Renown and HMS Repulse, built during the First World War for very high speed and heavy 15-inch guns.
Renqiu oil field
The Renqiu oil field is a giant buried-hill oil field in Hebei Province, China, discovered in 1975 in the Jizhong subbasin, the first Precambrian reservoir found in China.
Renqiu-Beijing Oil Pipeline
The Renqiu-Beijing Oil Pipeline (任京输油管道) is a crude oil pipeline in North China, built in 1976 to carry oil from the Renqiu oilfield to Beijing refineries.
Renso L. Caporali
Renso L. Caporali is an American aerospace engineer who was a key member of the F-14 Tomcat design team and led Grumman as chairman and CEO from 1990 to 1994.
Renusagar power station
Renusagar power station is a coal-fired captive power plant in Sonbhadra, Uttar Pradesh, India, owned by Hindalco Industries to power its Renukoot aluminum smelter.
Rényi differential privacy
Rényi differential privacy is a relaxation of differential privacy proposed by Ilya Mironov in 2017 that bounds the Rényi divergence between outputs on neighboring datasets.
Renzo Piano Building Workshop
Renzo Piano Building Workshop is an Italian architecture firm founded by Renzo Piano in 1981, known for the Centre Pompidou, the Shard in London, and the Whitney Museum.
REO Motor Car Company
The REO Motor Car Company was an American automobile and truck manufacturer in Lansing, Michigan, founded in 1904 by Ransom Eli Olds after he left Olds Motor Works.
Reorder buffer
The reorder buffer (ROB) is a hardware queue in out-of-order processors that holds instruction results and commits them in program order, providing precise exceptions and simple branch-misprediction recovery.
Repair welding
Repair welding is a metalworking method that restores worn, cracked, or defective metal components by removing the damage and depositing new weld metal chosen for the base metal.
Repco-Brabham V8
The Repco-Brabham V8 was a Formula One engine built by Repco in Melbourne from 1965 to 1968, winning world titles with Jack Brabham and Denny Hulme.
Repeat dialing
Repeat dialing, also known as Automatic Callback, is a telephone feature that automatically redials a busy number and completes the call when the line frees.
Repeater
A repeater is a fixed radio station that automatically receives a signal and retransmits it, on another frequency or the same one, to extend communication range.
Repeating crossbow
The repeating crossbow, or chu ko nu, is a Chinese crossbow with a magazine that fires bolts rapidly through one lever motion, known since the 4th century BC.
Repeating rifle
A repeating rifle is a rifled long gun with a magazine and a mechanical action that feeds the next cartridge, letting the shooter fire repeatedly without reloading.
Repetition code
The repetition code is a quantum error-correcting code that encodes one logical qubit into n entangled physical qubits, correcting bit-flip errors by majority vote but not phase errors.
Repetitive control
Repetitive control (RC) is a feedback method that embeds a periodic-signal generator inside the control loop, so systems track periodic references or reject periodic disturbances with near-zero steady-state error, used in power converters and disk drives.
Replay attack
A replay attack, also called a playback or repeat attack, captures a valid authentication message and retransmits it later, since integrity checks alone cannot detect it.
Replica and reproduction aircraft
Replica and reproduction aircraft are newly built copies of historic aircraft, from 2,500-hour kit builds to exact reproductions like the Me 262, whose originals no longer fly.
Replica dataset
Replica is a dataset of 18 photo-realistic 3D reconstructions of indoor spaces, released in June 2019 by Facebook Reality Labs and Facebook AI Research for embodied AI research.
Replica molding
Replica molding is a soft lithography fabrication method that copies a master's surface relief by casting and curing a liquid polymer, most often PDMS, producing microfluidic devices.
Replica pioneer locomotives of Britain and North America
Replica pioneer locomotives of Britain and North America are full-size working copies of early engines like Rocket, Locomotion No 1, and Jupiter, built mostly for anniversaries.
Replica technique
The replica technique, also called field metallographic replication, is a nondestructive metallographic method that records a prepared metal surface on plastic film for laboratory microscopy.
Replicas of Stephenson's Rocket
Replicas of Stephenson's Rocket are full-size reconstructions of the 1829 locomotive that won the Rainhill Trials, built since 1881 as working engines, static exhibits, and film props.
Replicate
Replicate is a cloud platform that turns open-source and custom machine learning models into pay-per-use APIs, founded in 2019 and agreed to be acquired by Cloudflare in 2025.
Replicator (Pentagon initiative)
Replicator is a Pentagon initiative announced in August 2023 by Deputy Defense Secretary Kathleen Hicks to field thousands of autonomous uncrewed systems, countering China's advantage in mass.
Replika
Replika is an AI-companion chatbot app launched in 2017 by entrepreneur Eugenia Kuyda and her company Luka, letting users create and converse with a persistent personal AI companion.