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Destroyer escort
A destroyer escort was a small, slow US Navy warship of World War II built to escort convoys and hunt submarines; 563 were built from 1941.
Destruction of the Kakhovka Dam
The destruction of the Kakhovka Dam, also called the Nova Kakhovka dam collapse, was the catastrophic breach of the dam at Nova Kakhovka, Ukraine, on 6 June 2023.
Destructive testing
Destructive testing is a family of engineering methods in which a material, component, or structure is loaded or broken to determine its strength and failure behavior, complementing non-destructive testing.
Detached eddy simulation
Detached eddy simulation (DES) is a hybrid CFD approach that treats boundary layers with RANS equations and resolves detached eddies with LES, first proposed in 1997.
Detail drawing
A detail drawing is a large-scale architectural drawing showing a small part of a building, such as a wall junction, with exact construction, dimensions, and materials.
Detailed City Experience
Detailed City Experience is an Apple Maps feature introduced with iOS 15 in September 2021, rendering selected cities in detailed 3D with elevation, trees, and custom landmarks.
Detection Algorithms
Detection algorithms for object detection locate and classify objects in images via bounding boxes. Families: two-stage R-CNN series, one-stage YOLO/SSD, transformer-based DETR/RT-DETR; measured by mAP and FPS.
Detector (radio)
A detector in radio is the receiver circuit that recovers the information carried by a radio-frequency signal, converting it into audible Morse clicks, voice, or a measured voltage.
Detectron2
Detectron2 is an open-source Python library from Facebook AI Research, built on PyTorch, for object detection, instance segmentation, and other visual recognition tasks, and the successor of the original Detectron.
Detention basin
A detention basin is an engineered depression that temporarily stores stormwater runoff and releases it slowly through a controlled outlet, reducing downstream peak flows and flooding.
Detention dam
A detention dam is a dam built to hold floodwater temporarily and release it at a controlled rate, rather than to store water permanently for supply or power.
Detergent
A detergent is a cleaning product whose active ingredients are surfactants, which lower water's surface tension so it can wet surfaces, lift soil, and rinse it away.
Deterioration modeling
Deterioration modeling, also called infrastructure deterioration modeling, uses statistical, probabilistic, and physical models to predict how infrastructure, most commonly highway bridges, declines over time, guiding maintenance and budget planning in systems like Pontis.
Determining the number of clusters in a data set
Determining the number of clusters in a data set is the problem of choosing how many groups a cluster analysis should produce, guided by indices like the silhouette.
Deterministic algorithm
A deterministic algorithm is an algorithm that, given the same inputs, always produces the same outputs on every run, making its behavior completely predictable from the input alone.
Deterministic policy gradient
The deterministic policy gradient (DPG) is a reinforcement-learning gradient for deterministic policies, proved model-free by Silver et al. in 2014 and the basis of DDPG and TD3.
Deterministic simulation
A deterministic simulation is a computational model in which every input is fixed and non-random, so repeated runs with the same inputs give identical outputs.
Dětmarovice Power Station
The Dětmarovice Power Station (Elektrárna Dětmarovice) is a power and heating plant in Dětmarovice in the Czech Republic's Moravian-Silesian Region, built between 1971 and 1976.
Detonating cord
Detonating cord, also called detcord or primacord, is a flexible explosive cord, usually with a PETN core, used to initiate other high explosives in blasting.
Detonation
Detonation is the propagation of a reaction through an explosive medium at a speed greater than sound, driven by a shock wave, distinguishing it from deflagration.
Detonation velocity
Detonation velocity, abbreviated VoD or D, is the speed at which a detonation front travels through an explosive material, one of the principal measures of explosive performance.
Detonator
A detonator, also called a blasting cap, is a small explosive device used to initiate detonation in a larger explosive, invented by Alfred Nobel in 1863.
DETR
DETR (DEtection TRansformer) is an object detection model introduced in May 2020 by Facebook AI researchers, treating detection as direct set prediction via a transformer encoder-decoder trained end-to-end.
DETRAN
A DETRAN (Departamento Estadual de Trânsito, State Traffic Department) is the state traffic authority in each Brazilian state, responsible for driver licensing and vehicle registration.
Detroit Dam
Detroit Dam is a concrete gravity dam on the North Santiam River about 45 miles east of Salem, Oregon, built by the Army Corps of Engineers between 1949 and 1953.
Detroit Diesel
Detroit Diesel is an American manufacturer of heavy-duty diesel engines for trucks, based in Detroit, Michigan, and owned by Daimler Truck North America since 2000.
Detroit Diesel Series 53
The Detroit Diesel Series 53 is a family of two-stroke diesel engines with 53 cubic inches per cylinder, launched by Detroit Diesel in 1957 for on-highway trucks.
Detroit Diesel Series 71
The Detroit Diesel Series 71 is a family of two-cycle diesel engines with 71 cubic inches per cylinder, introduced by General Motors in 1938 and produced for over half a century.
Detroit Diesel Series 92
The Detroit Diesel Series 92 is a family of two-stroke V-configuration diesel engines produced by Detroit Diesel from 1974, whose 6V-92TA dominated US transit buses.
Detroit Diesel V8 engine
The Detroit Diesel V8 engine, also known as the GM Diesel V8, is a family of 6.2- and 6.5-liter diesel V8s used in GM trucks and the military HMMWV from 1982.