The phrase "a basic quantity" is correct and usable in written English.
It can be used in contexts related to mathematics, science, or any field where fundamental measurements or values are discussed.
Example: "In physics, mass is considered a basic quantity that is essential for understanding the laws of motion."
Alternatives: "a fundamental measure" or "a primary value."
(a) The basic quantity λ ( z ), which appears in Theorem 4, can be written in terms of the Jacobian elliptic function d n ( z ) [10].
Let us start describing our method by defining a few basic quantities.
(e_{m}) is a m-dimensional column vector with all elements equal to 1. (B = left[ {b_{1},b_{2}, ldots,b_{n} } right]) denotes the basic quantity of a category of hazard-affected element, and (b_{j}) denotes the total quantity of a given subcategory of hazard-affected element.
In the present work, a new approach proposes to measure the photo-excitation cross-section (sigma ), which is a basic physical quantity independent from any experimental conditions, and characterizing an interaction process between two entities.
This can produce undesirable effects, like the underestimation of the annual maximum rainfall depth, Hd, associated with a given duration, d, that is the basic quantity in the development of rainfall depth-duration-frequency relationships.
In this paper, reverberation loss is considered as a basic physical quantity to describe shallow water reverberation, and reverberation loss versus time was calculated by using three models: the ray-based model, the WKBZ mode models with account taken and not taken of the effects of complex eigenvalues.
The basic quantity for likelihood construction is the survival function of an individual surviving beyond time t (1) S (t | x ) = exp [ − e β ′ x Λ 0 (t ) ] given x, the r-dimensional covariate vector, and β, the r-dimensional vector of regression coefficients.
The basic quantity in kinetic theory is the PDF (particle distribution function) (f s,v_{m},t)).
Equation (17) is the basic quantity to compute the mean deviations in Eq. 16.
Equation (28) is the basic quantity to compute the mean deviations for the exp-G distributions.
