... We demonstrate through numerical simulations that model parameters estimated with our technique are essentially bias-free, even when the average number of counts per bin is 1. ... The IW technique avoids such biases by estimating through successive iterations, where for each iteration, j, , and the best-fit parameters are determined by minimization of . ... In our sample, we find that the minimum values and best-fit parameters converge after about 6 iterations. ...

Next: Conclusions Up: Compensation for Read-Out Noise Previous: Implementation . ... The star cluster, shown in the left panel of Fig. 1 , consists of a field of unresolved stars at random locations and having randomly selected brightnesses. ... These are replotted in Fig. 8 to facilitate comparisons. ... The low level noise is reduced substantially in Fig. 11 , which is the average of 25 restorations of HST star cluster images, each being the result of performing 500 EM iterations. ...

Next: The Corrected Gauss--Newton Up: Outline of the Previous: The Modified Gauss--Newton . This is identical to the modified Gauss--Newton method, except in the way that the Hessian matrix is approximated. ... At each iteration, a new estimation of the Hessian is obtained by adding a rank one or two correction matrix to the last estimate such that , the estimate of the Hessian matrix at the iteration, satisfies . ... After some iterations and around the optimum, converges to the Hessian. ...

... Posts tagged ?density estimation? ... Tags: catalog , convex hull peeling , density estimation , DR6 , massive data , multivariate analysis , nonparametric , SDSS , SQL , voronoi tessellation . ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ... SAMSI AstroStat Prog. ...

... The possibility to use the electrostatic approximation to calculate the polarizability allows one to consider practically any shape scatterers - from the regular ones (ellipsoid, cylinder, disc) [ 7 , 274 ] to those with an arbitrary shape, structure and anisotropy [ 308 , 309 , 313 , 405 ] (in the last case the polarizability tensor should be found numerically) - using the theory of the Rayleigh scattering. ...

Cost Estimating Web Site . ... 2005 NASA Cost Analysis Symposium Databases . ... World , European Communities , Other European Countries , Americas , Asia , Africa , General US , US Federal Government , US Department of Defense , Aerospace Industry , NASA , Science & Engineering Handbooks . NASA Cost Estimating Handbook 2004 , Parametric Estimating Handbook .. ... Consumer Price Index , Employment Cost Index , GDP Deflator , Import Price Index , NASA New Start Index , Producer Price Index . ...

... User Guide ] Task: conterr Purpose: Continuum subtraction error estimate, when using UVLIN. Categories: uv analysis Given an image of the continuum in a spectral line experiment, CONTERR estimates the residual continuum artifacts that will be present after continuum subtraction using UVLIN. ... No default. Key: order The order of the polynomial fit in UVLIN, either one or two numbers can be given. If two, then CONTSEN determines the error for order(1) to order(2) inclusive. ...

... 8, ``Celestial Mechanics'', 2002 An approximate projection of confidence ellipsoids of space objects positions onto the celestial sphere A. P. Baturin Research Institute of Applied Mathematics and Mechanics, Tomsk, Russia The approximate method of calculation of a visible border of probable motion regions (PMR) for space objects (SO) has been considered. ... As a result, the simple analytical expressions for border points of PMR projection onto the celestial sphere have been obtained. ...

... The Round Earth . ... Aristarchus around 270 BC derived the Moon's distance from the duration of a lunar eclipse (Hipparchus later found an independent method). ... Let R be the radius of that circle and T the time it takes the Moon to go around once, about one month. ... Viewed from Earth, a "new Moon" (occuring between the time a thin crescent is last seen before sunrise and the time one is seen shortly after sunset) happens when the Moon in its apparent motion around the sky overtakes the Sun. ...

The Hills of Mars . ... Credit Copyright: Mars Exploration Rover Mission , JPL , NASA Explanation: Distant hills rise above a rocky, windswept plain in this sharp stereo scene from the Spirit rover on Mars . When viewed with red/blue glasses, the picture combines left and right images from Spirit's high resolution panoramic camera to yield a dramatic 3D perspective. The hills were estimated to lie about 2 kilometers away and be approximately 50 to 100 meters high. ...

... WIP, see http://www.sai.msu.su/~megera/wiki/2009-08-12 : Phrase Search - 1-2 month. ... DONE: contrib/btree_gin, GIN indexing for scalar data types -1 month. Initially, GIN was designed for indexing of non-scalar data types (arrays, text search, for example), but it's useful to have support for scalar data types to use in multicolumn GIN index. ... DONE: GIN not only equality search, GIN prefix search support - 4 weeks, see http://archives.postgresql.org/pgsql-patches/2008-04/msg00129.php . ...

... Thomson's multiple window method of spectral estimationthomson provides a very good estimate of the power spectrum by measuring the energy contained within a collection of rectangular shaped frequency intervals. ... Often, much of the fine structure of a spectral estimate is due to noise. It should be stressed that while other methods of spectral estimation (such as the Welchoppenheim method) exist, the Thomson method is particularly noteworthy for its precisely defined rectangular frequency bins. ...

... 2. (a) Metallicity function and relations between (b) metallicity and radial velocity, (c) metallicity and maximum distance from the Galactic plane,and (d)metallicity and variability period for RR Lyrae variables in the initial sample.The curve in the first graph is the maximum-likelihood approximation of the distribution using a sum of two normal curves with the indicated means,dispersions,and total numbers. ... next figure | privious figure . ...

... Space debris comprise the ever-increasing amount of inactive space hardware in orbit around the Earth as well as fragments of spacecraft that have broken up, exploded or otherwise become abandoned. About 50 percent of all trackable objects are due to in-orbit explosion events (about 200) or collision events (less than 10). International Year of Astronomy, Ireland National Node . ...

... Производитель: Arte Lamp . ... Коллекция: Estimate . Артикул: A2036LM-6SA . ... Раздел на сайте: Типы/Люстры/Подвесные . ... Подвесные . ... Новое наименование: Подвесная люстра Arte Lamp ESTIMATE A2036LM-6SA . ... Рубашка Only & Sons. ... основные характеристики: комфортная классическая прогулочная коляска 0+.  . nbsp; . ... легкая алюминевая рама легко складывается одной рукой . ... размеры :   . nbsp;78,2х51,5х106,2 см . ... nbsp;46,2х32,5х405,8 см . ...

... Smoke sighted . ... B. Call USFS at 437-2286, provide fire info as well as local weather data. ... B. 3.5m telescope: Face enclosure into smoke direction and turn on PF1. 2.5m telescope: Turn on HVAC system or set system for 1.0 pressurization. ... If time permits and immediate evacuation is not ordered: . a. make sure everyone on site is awake and aware of . ... Echelle: Top off LN2, (if time does not permit, turn Ion Pump off, turn off camera power) . DIS: Turn off camera electronics . ...

... Комментариев нет 22 августа 2010, 13:58 Blogger , English , Астрономия . ... Neptune will finally complete its first full orbit of the sun since it was discovered in 1846a approximately one year from now, according to NASA estimates. ... Twitter Weekly Updates for 2010-08-21 . ...

. Using Curiosity's Mast Camera to view scene in "natural" color . This image of terrain inside Mars' Gale Crater and the inset of the calibration target for the Mast Camera (Mastcam) on NASA's Mars rover Curiosity illustrate how the calibration target aids researchers in adjusting images to estimate "natural" color, or approximately what the colors would look like if we were to view the scene ourselves on Mars, using the known colors of materials on the target. NASA/JPL-Caltech/MSSS/ASU

... Theoretical Computer Science , 2014, vol. 547, pp. ... Problems of Information Transmission , 2012, vol.€а48, N2, pp.154 172 . ... Talks OpenCV wrapper and form processing for Common Lisp тАФ implementation notes. Lightning talk. European Lisp Symposium 2015, London, UK. ... European Lisp Symposium 2014, Paris, France. ... European Lisp Symposium 2013, Madrid, Spain. ... European Common Lisp Meeting 2013, Madrid, Spain. ... European Lisp Symposium 2012, Zadar, Croatia. ...

... Basic Observables: Zero-differenced phase and code ionosphere-free combinations of global GNSS network stations, corrected by P1-C1 satellite code biases (cc2noncc), daily observations with 30 seconds sampling rate Sites coordinates : IGb08 reference frame coordinates and velocities Displacements: solid tides, ocean loading, pole tide loading (IERS 2010) Geometric model : Receivers antennas eccentricities, absolute receiver and ...