Two new species belonging to the genus Willemia are described: W. bedosae sp. n. and W. christianseni sp. n. Redescriptions of Willemia dubia Christiansen & Bellinger, 1980 and W. similis Mills, 1934 are provided. Willemia vashtia Wray, 1950 is a new synonym of W. similis. These four species and four other of the genus constitute the Willemia anophthalma-group. This group is characterized by one feature not shared by the other species of the genus: the presence of setae a l on abdominal sternum IV. A comparative table and an identification key are given for these eight species, as well as some remarks on their habitats.
Precise wind energy potential assessment is vital for wind energy generation and planning and development of new wind power plants. This work proposes and evaluates a novel two-stage method for location-specific wind energy potential assessment. It combines accurate statistical modelling of annual wind direction distribution in a given location with supervised machine learning of efficient estimators that can approximate energy efficiency coefficients from the parameters of optimized statistical wind direction models. The statistical models are optimized using differential evolution and energy efficiency is approximated by evolutionary fuzzy rules.