The phrase "are necessary for determining" is correct and usable in written English.
It can be used when discussing the importance of certain factors or elements in the process of making a decision or reaching a conclusion.
Example: "The data collected from the surveys are necessary for determining the overall satisfaction of our customers."
Alternatives: "are essential for assessing" or "are crucial for evaluating".
Prospective studies using larger number of subjects are necessary for determining whether FABP4 level is indeed a major determinant of subsequent development of hypertension in subjects with a family history of hypertension.
Prospective longitudinal studies using larger numbers of subjects with no medication are necessary for determining whether FABP4 level is indeed a major determinant of subsequent development of cardiac dysfunction.
The Secretary of Defense shall provide for the keeping of such records as are necessary for determining the actuarial status of the Fund.
Dynamic modulus (|E∗|) and phase angle are necessary for determining the response of asphalt mixtures to in-service traffic and thermal loadings.
The output variables that are necessary for determining equations of the solar reactor are illustrated in Table 3.
These studies are necessary for determining the dynamics of within-host selection [including data on, and modeling of, the effects of glycan heterogeneity between the upper and lower respiratory tract (6)] and the potential for transmission of partially adapted viruses.
This inability to predict SoxS binding sites suggests that addition of sequence determinants is necessary for determining SoxS-mediated expression.
In other words the subevents provide the information which is necessary for determining the timing and position of fault slip.
Proper prediction of the radial gas holdup profiles is necessary for determining liquid mixing, flow regime transition, heat and mass transfer.
Cost estimation is necessary for determining the economic advantage of the business, which determines the ability of a company to be competitive.
Accurate prediction of the material properties of stainless steel at elevated temperatures is necessary for determining the load-carrying capacity of structures under fire conditions.
