l*******d
发帖数: 3343 | 1 http://www.bbc.co.uk/news/world-latin-america-22635671
Ecuador Pegasus satellite fears over space debris crash
The Ecuadorean space agency (EXA) is trying to pick up signals from its
satellite after it crashed in space into debris from an old rocket.
The nano-satellite, called Pegasus, was launched from the Jiuquan spaceport
in China less than a month ago.
It is Ecuador's first and only satellite in orbit.
Experts said Pegasus had collided with debris from a Soviet rocket but was
still in orbit.... 阅读全帖 |
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l*****n
发帖数: 135 | 3 Chicco Stroll Pegaso - $50
Bright Stars Portable Swing - $15
Please call me at (857) 244-1028 if you are interested in. The prices are
all negotiable. |
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d******e
发帖数: 7844 | 6 解SVM的Package早都满天飞了。
哪还用得着自己写solver。
liblinear,libsvm,svm-light,pegasos。
而且我还真纳闷你写过solver没有，写一个能用的很容易，但写一个速度快的就要经验
和技术了。 |
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d******e
发帖数: 7844 | 7 一看就是没写过solver的主儿，随便给你个data，就能把你用R写得solver搞死。
SVM的凸优化算法和Learning Theory我都搞，solver我也写，对这个问题，应该比你了
解的多，呵呵。算法那点所谓的“数学”无非就是点线性代数，最多是个
Lagrangian dual，一般不超过十行八行。像Pegasos这种随机算法，两行搞定。算法的
难度都在实现上，推导公式涉及的问题难度还不及理论的一成。
经验 |
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d******g
发帖数: 6966 | 8 wiki
1898–1910 De Dion Bouton
1914–1939 Stutz Bearcat
1929–1936 Bugatti Type 46
1934–1944 Škoda Popular
1950–1958 Lancia Aurelia
1951–1956 Pegaso Z-102
1957–1970 Lancia Flaminia
1961–1963 Pontiac Tempest
1964–1968 Ferrari 275
1963–1968 Ferrari 330
1968–1973 Ferrari Daytona
1972–1987 Alfa Romeo Alfetta
1974–1987 Alfa Romeo GTV/Alfa Romeo GTV6
1976–1988 Porsche 924
1976–1991 Volvo 300 series
1977–1985 Alfa Romeo Giulietta
1978–1995 Porsche 928
1982–1995 Porsche 944 and Porsche 968
1984–1987 A... 阅读全帖 |
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