Sentence examples for difficult existing from inspiring English sources
Decision-making concerning the most appropriate energy technology for supplying these areas has been difficult; existing energy decision-support tools have been useful but are mostly incomplete.
The diagnosis of Candida spp is difficult, existing up to 50% of asymptomatic cases, moreover, Candida spp, is considered endogenous flora normal of the vagina, in growth limited conditions [ 13]; on the other hand, the presence and trichomoniasis symptoms depend on local immunity and the amount of parasites inoculated, and transit may be asymptomatic in 50% of cases [ 14].
Second, they are meant to do something that is difficult for existing nuclear plants but easy for gas: change power output rapidly.
Effective removal of these pollutants can be difficult with existing water-treatment facilities.
However, it is difficult for existing hybrid BCIs to implement the multi-dimensional control in one command cycle.
Yet, in spite of pressures to avoid these high-cost errors, predicting project success is difficult, and existing models are often unreliable.
When a salient object shares a similar colour with the background, it is difficult for existing RGB models to extract saliency.
Capturing change involving similarly complex interrelationships between cultural elements in a population of agents would be difficult with existing modeling strategies.
Signal processing in noisy area: Due to the presence of large amplitude noise, it is difficult for existing signal processing techniques to process the noisy data in smart power grid with acceptable signal quality.
It is difficult for existing approaches to offer services as they are not initially designed as client's location is changing continuously and services need to be adapted accordingly.
Due to the complex multipath environment, fast varying acoustic channel and heterogenous link condition, it is difficult for existing network simulators to evaluate the performance of MAC protocols in the real world.
