The phrase "a combination of effective" is not complete and lacks clarity in written English.
It can be used when discussing the effectiveness of multiple elements or strategies working together, but it needs to be followed by a noun to be clear.
Example: "The project was successful due to a combination of effective strategies and teamwork."
Alternatives: "a blend of effective" or "a mix of effective".
Although the turnout of black voters has usually lagged behind their percentage of the population, efforts in several states have shown that the turnout can be greatly stimulated by a combination of effective candidates and marketing.
The GRN scenario assumes implementation of a combination of effective options, regardless of their costs.
With a combination of effective medium and percolation theory, an analytical model was proposed to acquire the relative resistivity of cement paste and C S H.
(2) A combination of effective volume ratio and the number of continuously stirred tank reactors, N could better reflect the effect of water depth on the removal efficiency.
A combination of effective approaches and a well-designed syllabus should give knowledge of British culture and encourage students to compare it with their own.
Through a combination of effective tactics, daunting numbers and — significantly — restraint by both sides, police managed to bring the encampment to a largely peaceful end, avoiding the melees that marred the eviction of protesters from similar camps in Oakland, New York and elsewhere.
San Francisco battled back into the game with a combination of an effective ground game, smart defensive adjustments and improved blocking of both the run and pass.
She attributes the trends to a "combination of very effective action on the part of the federal government" and "various acts on the part of graduate institutions".
A combination of the effective strain damage (ESD) model based FORTRAN code with finite element software was proposed to predict fatigue life under random loadings.
The studied objective function is a combination of three effective factors in the performance of a flowsheet for this process which are: permeate CO2 purity, CO2 recovery of the system, and energy penalty of the configuration.
The results indicate that a combination of high effective stroke length to bore ratio and long valve overlapping distance with a low supercharging pressure has the potential to achieve high scavenging and trapping efficiencies with low short-circuiting losses.
