\right\|}}={\frac {\sum _{i=1}^{N}d_{i,j}q_{i}}{{\sqrt {\sum _{i=1}^{N}d_{i,j}^{2}}}{\sqrt {\sum _{i=1}^{N}q_{i}^{2}}}}}} As all vectors under consideration...
10 KB (1,417 words) - 03:40, 22 June 2025
The entries in each of the other columns sum to 0, so that each column is a contrast vector. A 3 × 3 experiment: Here we expect 3-1 = 2 degrees of freedom...
37 KB (4,543 words) - 03:02, 24 April 2025
Principal component analysis (redirect from Characteristic vector analysis)
_{k}=\mathbf {X} -\sum _{s=1}^{k-1}\mathbf {X} \mathbf {w} _{(s)}\mathbf {w} _{(s)}^{\mathsf {T}}} and then finding the weight vector which extracts the...
117 KB (14,851 words) - 14:54, 21 July 2025
Invariant mass (section Sum of rest masses)
particle. ∑ E {\textstyle \sum E} is the sum of the energies of the particles ∑ p {\textstyle \sum \mathbf {p} } is the vector sum of the momentum of the...
13 KB (2,014 words) - 15:20, 1 August 2025
Bra–ket notation (redirect from Ket vector)
notation, is a notation for linear algebra and linear operators on complex vector spaces together with their dual space both in the finite-dimensional and...
42 KB (6,334 words) - 08:54, 10 May 2025
Quantum state (redirect from Quantum state vector)
Stern–Gerlach experiment, there are two possible results: up or down. A pure state here is represented by a two-dimensional complex vector ( α , β ) {\displaystyle...
42 KB (5,551 words) - 00:17, 24 June 2025
Angular momentum (redirect from Orbital angular momentum vector)
mass of the particles is simply their sum, M = ∑ i m i . {\displaystyle M=\sum _{i}m_{i}.} The position vector of the center of mass is defined by, M...
94 KB (13,490 words) - 23:47, 23 July 2025
In classical mechanics, the Laplace–Runge–Lenz vector (LRL vector) is a vector used chiefly to describe the shape and orientation of the orbit of one...
79 KB (10,218 words) - 19:44, 20 May 2025
Multivariate normal distribution (redirect from Normal random vector)
they sum to a mixture model.[citation needed] In general, random variables may be uncorrelated but statistically dependent. But if a random vector has...
65 KB (9,607 words) - 21:52, 1 August 2025
smaller) centrifugal force cancels the weight (as vectors), while as seen from any inertial frame the (vector) sum of the weight and the tension makes the object...
14 KB (1,563 words) - 17:16, 18 March 2025
Four-momentum (redirect from Momentum Four-Vector)
four-dimensional spacetime. Momentum is a vector in three dimensions; similarly four-momentum is a four-vector in spacetime. The contravariant four-momentum...
22 KB (3,832 words) - 11:32, 20 June 2025
Wave function collapse (redirect from State vector reduction)
system can be expressed as a vector using bra–ket notation: | ψ ⟩ = ∑ i c i | ϕ i ⟩ . {\displaystyle |\psi \rangle =\sum _{i}c_{i}|\phi _{i}\rangle .}...
24 KB (2,836 words) - 13:09, 28 July 2025
Analysis of variance (category Design of experiments)
encode the factors into the ∑ b = 1 B I b {\textstyle \sum _{b=1}^{B}I_{b}} dimensional vector v k {\displaystyle v_{k}} . The one-hot encoding function...
57 KB (7,645 words) - 06:06, 28 July 2025
In statistics, the explained sum of squares (ESS), alternatively known as the model sum of squares or sum of squares due to regression (SSR – not to be...
8 KB (1,915 words) - 20:50, 28 February 2024
\\X_{i}^{(k)}\end{bmatrix}}} be independent random vectors. The sum of the random vectors X 1 , … , X n {\displaystyle \mathbf {X} _{1},\ldots ,\mathbf...
67 KB (9,202 words) - 03:48, 9 June 2025
An experiment is a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried. Experiments...
36 KB (4,606 words) - 12:37, 20 June 2025
seconds into flight 167 1986-09-05 15:08 Delta 3920 180 CCAFS LC-17B Vector Sum Experiment (USA-19) Experimental on-orbit ASAT test satellite LEO Success 168...
50 KB (1,474 words) - 15:17, 14 July 2025
¯ ) 2 {\textstyle {\sqrt {\sum _{i}\left(x_{i}-{\bar {x}}\right)^{2}}}} is equal to the standard deviation of the vector (x1, x2, x3), multiplied by...
59 KB (8,278 words) - 02:30, 10 July 2025
Least squares (redirect from Sum of Squared Error)
technique that aims to determine the best fit function by minimizing the sum of the squares of the differences between the observed values and the predicted...
36 KB (5,243 words) - 23:15, 19 June 2025
Success 104 5 September 1986 15:08 Delta 3000 Thor-Delta 3920 USA-19 (Vector Sum Experiment) Success Experimental in-orbit ASAT satellite for the SDI. 105 20...
72 KB (907 words) - 13:10, 29 July 2025
{\bar {X}}} be the sample mean. The random vector can be decomposed as the sum of the sample mean plus a vector of residuals: ( X 1 ⋮ X n ) = X ¯ ( 1 ⋮ 1...
30 KB (4,530 words) - 12:18, 18 June 2025
blind or blinded experiment, information which may influence the participants of the experiment is withheld until after the experiment is complete. Good...
31 KB (3,769 words) - 22:37, 29 May 2025
{1}{N}}\sum _{i=1}^{N}\left(X_{ij}-\operatorname {E} \left(X_{j}\right)\right)\left(X_{ik}-\operatorname {E} \left(X_{k}\right)\right)} . For a vector X =...
29 KB (4,754 words) - 01:56, 4 May 2025
In quantum physics, the Stern–Gerlach experiment demonstrated that the spatial orientation of angular momentum is quantized. Thus an atomic-scale system...
30 KB (3,481 words) - 11:16, 27 June 2025
Bell's theorem (redirect from Bell's experiment)
of these four measurements can be made in a single trial of the experiment, the sum ⟨ A 0 ⊗ B 0 ⟩ + ⟨ A 0 ⊗ B 1 ⟩ + ⟨ A 1 ⊗ B 0 ⟩ − ⟨ A 1 ⊗ B 1 ⟩ = 2...
78 KB (9,867 words) - 22:34, 16 July 2025
Special relativity (section 4‑vectors)
angle of the beam relative to the receiver would be calculable from the vector sum of the receiver's motions and the velocity of the incident light. (2)...
184 KB (24,722 words) - 22:54, 27 July 2025
{X} } , a response vector y → {\displaystyle {\vec {y}}} , a parameter vector β → {\displaystyle {\vec {\beta }}} , and a vector ε → {\displaystyle {\vec...
15 KB (2,406 words) - 23:39, 31 May 2025
White noise (section White noise vector)
slightly. A random vector (that is, a random variable with values in Rn) is said to be a white noise vector or white random vector if its components each...
30 KB (4,037 words) - 08:39, 28 June 2025
Addition (redirect from Series sum)
interpreted as a vector from the origin in the Euclidean plane to the point ( a , b ) {\displaystyle (a,b)} in the plane. The sum of two vectors is obtained...
85 KB (10,266 words) - 13:43, 31 July 2025
attraction F towards P and its weight W directed towards the Earth. The vector sum of W and F results in a tension T in the pendulum string. The Earth has...
32 KB (3,693 words) - 13:13, 27 January 2025