樯
5.A long pole extending upward at an angle from the mast of a derrick to support or guide objects lifted or suspended.
6.A tall vertical spar, sometimes sectioned, that rises from the keel or deck of a sailing vessel to support the sails and running rigging.
7.A two-masted sailing ship, square-rigged on both masts, carrying two or more headsails and a quadrilateral gaff sail or spanker aft of the mizzenmast.
8.Its basic principle is to regard selecting or do not selecting a feature as a two-level independent factor; the parameters of SVM as continuous noise factors; the accuracy of the SVM model as the dependent variable; to employ a fractional factorial experiment design to form the experiment which combines the two-level factors and the noise factors; after the experiment is finished, to analyze the effect of each factor to determine the effective independent factor combination, namely the best feature combination for the SVM model.
