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An object in a category is projective if for any epimorphism: and morphism:, there is a morphism ¯: such that ¯ =, i.e. the following diagram commutes: . That is, every morphism factors through every epimorphism .
It has important applications in the areas of rendezvous, targeting, guidance, and preliminary orbit determination. [1] Suppose a body under the influence of a central gravitational force is observed to travel from point P 1 on its conic trajectory, to a point P 2 in a time T. The time of flight is related to other variables by Lambert's ...
Early in World War II, target range and bearing measurements were taken over a period of time and plotted manually on a chart. [14] The speed and course of the target could be computed using the distance the target traveled over an interval of time. During the latter part of World War II, the speed of the target could be measured using radar data.
Algebra is the branch of mathematics that studies certain abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic operations other than the standard arithmetic operations, such as addition and multiplication.
A police dog has been injured in an incident that saw armed officers track a van suspected of carrying weapons. West Midlands Police said the van was spotted by officers on Saturday morning using ...
MDOS was designed to fully emulate the TI-99/4A computer while providing an advanced (for its time) virtual memory operating environment with full support for mouse, GUI, and complex mathematical applications.
Several progressively more accurate approximations of the step function. An asymmetrical Gaussian function fit to a noisy curve using regression.. In general, a function approximation problem asks us to select a function among a well-defined class [citation needed] [clarification needed] that closely matches ("approximates") a target function [citation needed] in a task-specific way.
Target Motion Analysis (TMA) is a process to determine the position of a target using passive sensor information. Sensors like passive RADAR and SONAR provide directional and occasionally frequency information. TMA is done by marking from which direction the sound comes at different times, and comparing the motion with that of the operator's ...