Various sizes of micro computersEPIC (Express) 165 × 115ESM 149 × 71Nano-ITX 120 × 120COM Express 125 × 95ESMexpress 125 × 95ETX/XTX 114 × 95Pico-ITX 100 × 72PC/104 (-Plus) 96 × 90ESMini 95 × 55
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I assume you mean covariance matrix and I assume that you are familiar with the definition:C = E[(X-u)(X-u)T]where X is a random vector and u = E(X) is the meanThe definition of non-negative definite is:xTCx ≥ 0 for any vector x Є RSo is xTE[(X-u)(X-u)T]x ≥ 0?Then, from one of the covariance properties:E[(xT(X-u))((X-u)Tx)] = E[xT([(X-u)(X-u)T]x)] = E[((xTI)x)] = E[xTx]Finally, since we've already defined x to have only real values, xTx is therefore non-negative definite by definition.
Mean is the sum of several values of the same type (x1, x2,..., xN ) divided by the number of values. Mean = (x1 + x2 + ... xN ) /N The Least square method is used when doing a regression of a cloud of point { (x1,y1), (x2,y2) etc. } by a function (linear, parabolic hyperbolic etc.). With this special algorithm we get the closest function f (x) to approximated the cloud of point. f(x, Beta) ~ y Beta = (XTX)-1XT Y = coefficients of the regression The points must be in 2 dimensions, because the methods needs to derivate the function f. I think that the least square mean is not the proper term because you have a function f ... What is the mean of f (x) = a *x + b ??? See.
ok i love all snowmobiles yamaha,polaris,ski-doo,arctic cat, ill take any of them but the real question is where and how you are going to be riding. Polaris= boondocking great small bolck mototrs Arctic Cat= trails made more for comfort Yamaha=LONG LAKES big 4-stroke muscle Ski-doo=mountains there really light dude its up to u i own arctic cat and polaris a AC 03 F7 and Polaris 05 Fusion and the F7 is a MONSTER I KICK MAC Z 1000's ASSes all i got is 96 studs and the fusion its ok not the greatest it was cheap and a left over So the best of 08-09 Arctic Cat= F8 sno pro, M1000 sno pro, Jaguar Poalris= IQ Dragon 800 SP, IQ Shift Ski-doo= Rev xp TNT, Rev xp 800 Yamaha= nytro xtx, vector gt