The phrase "a certain approximation" is correct and usable in written English.
It can be used when discussing an estimate or a rough calculation that is not exact but provides a general idea of a value or concept.
Example: "The results of the experiment yielded a certain approximation of the expected outcome, which will be refined in future trials."
Alternatives: "a rough estimate" or "an approximate value".
Under a certain approximation in our grafting system, we obtain exact expressions for the weight-average molecular weight and gel point of the system.
The efficiency is evaluated of various semianalytical annular finite elements in predicting the vibrational modes for disks where the effect of transverse shear and rotary inertia becomes important, with reference both to the minimum number of degrees of freedom and to the minimum number of operations required to achieve a certain approximation for the exact natural frequency value.
We show that a σ-weakly closed subspace J of the bounded operators BH on an infinite dimensional Hilbert space H has Property Sσ (the Fubini product (LT =L⊗ for all σ-weakly closed subspaces T⊂B(H)) if and only if J satisfies a certain approximation property, which we call the σ-weak approximation property.
Molecules having between 40 and 80 heavy atoms are passed to an algorithm that utilizes a certain approximation in identifying MCES.
In short, the derivation of (1.2) is based on the local truncated error analysis and the error correction term comes from a certain approximation of the difference between the true solution of SDEs and one-step explicit Milstein approximation.
Simply speaking, the idea is to approximate the matrix inverse by a matrix polynomial with J terms, where J needs not to scale with the system dimensions to maintain a certain approximation accuracy [19].
The kinetic law can be deduced under certain approximation for an enzyme with known kinetic mechanism that is when we know how ligands bind and dissociate from the enzyme and at which state catalytic transitions occur.
The actual hob tooth profile is a certain linear approximation of the desired profile.
The upper bound is equal to the cost of the new algorithm and is given in terms of the complexity of a certain function approximation problem.
We use the notion of A-compact sets (determined by an operator ideal A), introduced by Carl and Stephani (1984), to show that many known results of certain approximation properties and several ideals of compact operators can be systematically studied under this framework.
In the authors' earlier work [1], a component length scale control functional was proposed to regulate the topology evolution with uniform thickness distribution; however, the sensitivity result was numerically calculated with certain approximation.
