A weight (2) is secured to a band or line (4) extending through the tube and arm, so that the weight can be moved along the inside of the arm. A fastener (15) for securing to the machines is provided at the opposite end of the band or line to the weight....
摘要: We describe an extension to a standard model for the relationship between the occupancy pattern of a species on a landscape and imperfect observations of its presence or absence. The structure in the observation process is incorporated through a probabilistic model, and environmental inputs ...