As the number of 3-D association events increases dramatically [15] even given small number of measurements, targets and illuminators, it is computationally unrealistic to directly implement conventional 2-D data association approaches to resolve the 3-D data association problem in this passive radar system.
Therefore, it is not unrealistic to apply existing interactive optimization methods to those problems.
This appears unrealistic and extremely difficult to implement politically.
Some believe that results counterbalancing the detection rate for clinically important IFs, believed to be 2% to 8% [ 14], are unrealistic to expect, and attempts to implement these models are impractical in light of the enormous effort and expenditure required [ 3, 14, 30, 32, 33].
The review did, however, elicit reasons for rejection: it found remarkably similar rationale to those detected in our study, including concerns that recommendations were too costly, inappropriate or unrealistic, or not within the organisation's power to implement.
The prospect of a federal cap-and-trade system in Canada surfaced Thursday at a debate among three men vying to be prime minister, with Liberal leader Justin Trudeau calling an opponent's plan to implement the scheme "completely non-sensical" and "so unrealistic".
But with the president's finger poised on the nuclear button, it might have seemed unrealistic for constitutional scholars to insist on a fundamental difference between the executive power to implement our foreign policy commitments and the power to terminate them.
The cost and resources required to implement airport-style security for trains and buses is simply too prohibitive and unrealistic, which is why they are, and will remain, exposed and targets of at-will attacks.
It is unrealistic to expect volunteers in the workplace to have all of these characteristics and competencies, together with the time and space to implement them.
