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  2. Java performance - Wikipedia

    en.wikipedia.org/wiki/Java_performance

    Locking a block or an object is a time-consuming operation due to the nature of the underlying operating system-level operation involved (see concurrency control and lock granularity). As the Java library does not know which methods will be used by more than one thread, the standard library always locks blocks when needed in a multithreaded ...

  3. Dynamic time warping - Wikipedia

    en.wikipedia.org/wiki/Dynamic_time_warping

    Due to different speaking rates, a non-linear fluctuation occurs in speech pattern versus time axis, which needs to be eliminated. [31] DP matching is a pattern-matching algorithm based on dynamic programming (DP) , which uses a time-normalization effect, where the fluctuations in the time axis are modeled using a non-linear time-warping function.

  4. Speed - Wikipedia

    en.wikipedia.org/wiki/Speed

    The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval; [2] the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero. Speed is the magnitude of velocity (a vector), which indicates additionally the direction of ...

  5. Relative velocity - Wikipedia

    en.wikipedia.org/wiki/Relative_velocity

    The relative velocity of an object B relative to an observer A, denoted (also or ⁡), is the velocity vector of B measured in the rest frame of A. The relative speed v B ∣ A = ‖ v B ∣ A ‖ {\displaystyle v_{B\mid A}=\|\mathbf {v} _{B\mid A}\|} is the vector norm of the relative velocity.

  6. Radial velocity - Wikipedia

    en.wikipedia.org/wiki/Radial_Velocity

    The radial speed or range rate is the temporal rate of the distance or range between the two points. It is a signed scalar quantity, formulated as the scalar projection of the relative velocity vector onto the LOS direction. Equivalently, radial speed equals the norm of the radial velocity, modulo the sign. [a]

  7. Gilbert–Johnson–Keerthi distance algorithm - Wikipedia

    en.wikipedia.org/wiki/Gilbert–Johnson–Keerthi...

    "A fast procedure for computing the distance between complex objects in three-dimensional space", Gilbert, Johnson and Keerthi - the initial publication "Computing the Distance between Objects", Oxford professor Stephen Cameron's implementation of GJK "A Strange But Elegant Approach to a Surprisingly Hard Problem (GJK Algorithm)"

  8. Projectile motion - Wikipedia

    en.wikipedia.org/wiki/Projectile_motion

    The speed-dependence of the friction force is linear (()) at very low speeds (Stokes drag) and quadratic (()) at large speeds (Newton drag). [8] The transition between these behaviours is determined by the Reynolds number , which depends on object speed and size, density ρ {\textstyle \rho } and dynamic viscosity η {\textstyle \eta } of the ...

  9. Tangential speed - Wikipedia

    en.wikipedia.org/wiki/Tangential_speed

    Travelling a greater distance in the same time means a greater speed, and so linear speed is greater on the outer edge of a rotating object than it is closer to the axis. This speed along a circular path is known as tangential speed because the direction of motion is tangent to the circumference of the circle.