Htr

HTR is an acronym that can refer to multiple concepts in different fields. In nuclear energy, High-Temperature Reactor (HTR) denotes a class of gas-cooled, graphite-moderated reactors designed to operate at high outlet temperatures, enabling electricity generation and industrial process heat. Designs have included pebble-bed and prismatic-block configurations, with helium as the primary coolant. The concept originated in Germany as Hochtemperatur-Reaktor and has been developed by other countries. Historic projects include Germany's AVR and THTR-300, and later demonstrations in China (HTR-10, HTR-PM) and South Africa (PBMR). Commercial deployment of HTRs has been limited, with most activity in China and ongoing research and large-scale demonstrations elsewhere.

In computer science, Handwritten Text Recognition (HTR) is the process of converting human handwriting into machine-readable text. Modern HTR systems use neural networks, often with connectionist temporal classification or sequence-to-sequence models, to handle diverse handwriting styles. They are applied to digitizing historical documents, forms processing, and assistive technologies. Evaluation typically uses character error rate or word error rate, and progress has accelerated with transformer-based architectures.

Other uses of the acronym exist in research and industry but are less common. The term HTR should be interpreted from context to avoid ambiguity.