filter paper
61Trickling filter — A trickling filter consists of a fixed bed of rocks, gravel, slag, polyurethane foam, sphagnum peat moss, or plastic media over which sewage or other wastewater flows downward and causes a layer or film of microbial slime to grow, covering the… …
62Electronic paper — Electronic paper, also called e paper, is a display technology designed to mimic the appearance of ordinary ink on paper. Unlike a conventional flat panel display, which uses a backlight to illuminate its pixels, electronic paper reflects light… …
63Rolling paper — For the Wiz Khalifa album, see Rolling Papers (Wiz Khalifa album). Rolling papers are small sheets, rolls, or leaves of paper which are sold for rolling one s own cigarettes either by hand or with a rolling machine. When rolling a cigarette, one… …
64Open XML Paper Specification — (OpenXPS) Filename extension .oxps, .xps Internet media type application/oxps, application/vnd.ms xpsdocument Developed by Micro …
65XML Paper Specification — Infobox file format name = XML Paper Specification (XPS) icon = caption = The XPS Viewer application displaying a printout of the Wikipedia front page extension = .xps mime = application/vnd.ms xpsdocument type code = uniform type = magic = owner …
66Kalman filter — Roles of the variables in the Kalman filter. (Larger image here) In statistics, the Kalman filter is a mathematical method named after Rudolf E. Kálmán. Its purpose is to use measurements observed over time, containing noise (random variations)… …
67Butterworth filter — The Butterworth filter is one type of electronic filter design. It is designed to have a frequency response which is as flat as mathematically possible in the passband. Another name for them is maximally flat magnitude filters.The Butterworth… …
68Ensemble Kalman filter — The ensemble Kalman filter (EnKF) is a recursive filter suitable for problems with a large number of variables, such as discretizations of partial differential equations in geophysical models. The EnKF originated as a version of the Kalman filter …
69Particle filter — Particle filters, also known as sequential Monte Carlo methods (SMC), are sophisticated model estimation techniques based on simulation. They are usually used to estimate Bayesian models and are the sequential ( on line ) analogue of Markov chain …
70Cigarette filter — Filters in a new and used cigarette A cigarette filter has the purpose of reducing the amount of smoke, tar, and fine particles inhaled during the combustion of a cigarette. Filters also reduce the harshness of the smoke and keep tobacco flakes… …
