3.a forest of masts in a harbour;
4.The ship lost her masts in the gale.
5.A long pole extending upward at an angle from the mast of a derrick to support or guide objects lifted or suspended.
吊杆从起重机的竖
樯上以一定角度向上伸出的长杆，用来支持或牵引物体竖立或吊起
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.
船桅，桅杆一条高的（有时为分段的）垂直
樯，从帆船的龙骨或甲板直立起来以支持帆和操纵装置
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.
双桅横帆船有两根桅杆的帆船，每个桅杆上都有横帆，载有两个或更多的前帆和一个四边形的斜桁帆或在后桅的尾部装有后
樯纵帆
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.
其基本原理为：将一个输入变?档难∪∮敕袷游?桓龆??嫉氖笛橐蜃樱唤?桓??凳游?桓鲞B续的噪音因子；将模型的准确度视为因变?担焕?貌糠忠蜃邮笛
樯杓频玫绞笛橐蜃佑朐胍粢蜃拥淖楹希皇笛橥瓯虾螅??幸蜃拥男Ч?治觯?跃龆ㄗ罴训氖笛橐蜃幼楹希?醋罴训氖淙氡?底楹稀
