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C294, 25.11.2005, pp. 38–44. Registration, Evaluation, Authorisation and Restriction of Chemicals ( REACH) is a European Union regulation dating from 18 December 2006. [1] REACH addresses the production and use of chemical substances, and their potential impacts on both human health and the environment. Its 849 pages took seven years to pass ...
Common technical definition. Accuracy is the proximity of measurement results to the accepted value; precision is the degree to which repeated (or reproducible) measurements under unchanged conditions show the same results. In the fields of science and engineering, the accuracy of a measurement system is the degree of closeness of measurements ...
More recently, the term has come into much wider usage with the development and adoption of GPS. Neglecting ionospheric and tropospheric effects, the signal from navigation satellites has a fixed precision. Therefore, the relative satellite-receiver geometry plays a major role in determining the precision of estimated positions and times.
t. e. In classical mechanics, the central-force problem is to determine the motion of a particle in a single central potential field. A central force is a force (possibly negative) that points from the particle directly towards a fixed point in space, the center, and whose magnitude only depends on the distance of the object to the center.
Precision (statistics) In statistics, the precision matrix or concentration matrix is the matrix inverse of the covariance matrix or dispersion matrix, . [1] [2] [3] For univariate distributions, the precision matrix degenerates into a scalar precision, defined as the reciprocal of the variance, . [4]
The Precision Strike Missile (PrSM) is a short-range ballistic missile developed by the United States Army to replace the MGM-140 ATACMS. Development [ edit ] In March 2016, Lockheed Martin , Boeing , and Raytheon announced they would bid on a missile to meet the U.S. Army's Long Range Precision Fires (LRPF) requirement to replace the ATACMS.
Pseudorange. The pseudorange (from pseudo- and range) is the pseudo distance between a satellite and a navigation satellite receiver (see GNSS positioning calculation ), for instance Global Positioning System (GPS) receivers. To determine its position, a satellite navigation receiver will determine the ranges to (at least) four satellites as ...
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