Rotating Squares Look Like Pincushions
نویسندگان
چکیده
Rotating squares appeared to be distorted into pincushions with concave sides. These illusory shape changes were caused by a perceived compression along the curved path of motion.
منابع مشابه
A Nonlinear Least Squares Approach to the Numerical Optimal Control of Non-holonomic Systems
This paper gives a nonlinear least squares a p p r o d for numerically finding a trajectory to transfer a non-holonomic system from one configuration to another while satisfying given point-wise configuration constraints. A car like robot is considered as an example. The car like robot is kinematically constrained and is modelled as a 2 D object translating and rotating in the horizontal plane....
متن کاملThe whole moves less than the spin of its parts.
When individually moving elements in the visual scene are perceptually grouped together into a coherently moving object, they can appear to slow down. In the present article, we show that the perceived speed of a particular global-motion percept is not dictated completely by the speed of the local moving elements. We investigated a stimulus that leads to bistable percepts, in which local and gl...
متن کاملFusion of the Dimensionless Parameters and Filtering Methods in Rotating Machinery Fault Diagnosis
For the problem of large dimensionless index fluctuations in rotating machinery complex fault and that the corresponding scope is difficult to determine. In this paper proposes a rotating machinery complex fault method that combined dimensionless and the least squares method filtering. This method implementation filtering and determine the scope of the dimensionless index. By doing experiments ...
متن کاملAn Intelligent Diagnosis Method for Rotating Machinery Using Least Squares Mapping and a Fuzzy Neural Network
This study proposes a new condition diagnosis method for rotating machinery developed using least squares mapping (LSM) and a fuzzy neural network. The non-dimensional symptom parameters (NSPs) in the time domain are defined to reflect the features of the vibration signals measured in each state. A sensitive evaluation method for selecting good symptom parameters using detection index (DI) is a...
متن کاملDifferential rotation in rapidly rotating F - stars ⋆ , ⋆ ⋆
We obtained high quality spectra of 135 stars of spectral types F and later and derived " overall " broadening functions in selected wavelength regions utilizing a Least Squares Deconvolution (LSD) procedure. Precision values of the projected rotational velocity v sin i were derived from the first zero of the Fourier transformed profiles and the shapes of the profiles were analyzed for effects ...
متن کامل