The phrase "a certain correlation" is correct and usable in written English.
It can be used when discussing a specific but not precisely defined relationship between two or more variables or factors.
Example: "The study revealed a certain correlation between sleep patterns and academic performance among students."
Alternatives: "a specific relationship" or "a particular connection".
And there is a certain correlation between RCI and slope grades.
A certain correlation exists between the occurrence of rockbursts and the influencing factors, such as the geological structure, construction method, and excavation disturbance, among which the geological structure plays a crucial role.
The sensors receive Gaussian observations that have a certain correlation structure.
Additionally, the magnitude of permeability variation has a certain correlation to initial permeability.
We also attempted to find out whether a certain correlation exists between focus latitudes and SSN.
All the results above-mentioned suggested that there may be a certain correlation between final broth pH, lactonic SL and Lac SL/tot SL ratio in RSHH.
The CO2, H2S and SO2 concentrations changed in a wide range in certain correlation with the wind speed.
At a certain, higher, correlation rate it switches from these frequencies to reliable firing modes correlated with the input – there might be different correlation values for different neurons.
3) For the spatial position, the expanding changes in the road kernel area were consistent with the grade changes of the urban central ecological risk, primarily because both had a certain spatial correlation with the expressways.
It is not surprising to observe that a certain negative correlation between the reliability of structure elucidation and the age of the report exists.
This indicates that the parameters ϕ3 r and ϕ4 r have a certain significant correlation that must be fulfilled at termination to yield unique solutions for other fluxes.
