CAD
K-means算法叙述正确的是() ["在K-means算法中K是事先给定的,这个K值的选定是非常难以估计的","在K-means算法中,首先需要根据初始聚类中心来确定一个初始划分,然后对初始划分进行优化","对于一个类中的每个对象,在其给定半径的领域中包含的对象不能少于某一给定的最小数目","从K-means算法框架可以看出,该算法需要不断地进行样本分类调整,不断地计算调整后的新的聚类中心,因此当数据量非常大时,算法的时间开销是非常大的"]
与精神分裂症预后有关的是() ["病前有无精神因素","家族史中有无典型精神分裂症","病前性格内向与否","起病急或缓","症状以阳性还是阴性为主"]
You have configured the following: RMAN> CONFIGURE DEFAULT DEVICE TYPE TO ’sbt’; new RMAN configuration parameters: CONFIGURE DEFAULT DEVICE TYPE TO ’sbt’; new RMAN configuration parameters are successfully stored RMAN> SHOW DEVICE TYPE; RMAN configuration parameters are: CONFIGURE DEVICE TYPE SBT PARALLELISM 1; # CONFIGURE DEVICE TYPE DISK PARALLELISM 1; # RMAN> CONFIGURE DEVICE TYPE SET PARALLELISM 5; RMAN> SHOW DEVICE TYPE; RMAN configuration parameters are: CONFIGURE DEVICE TYPE SBT PARALLELISM 5; CONFIGURE DEVICE TYPE DISK PARALLELISM 1; # How many channels are allocated to SBT?() ["0, because channels have not been defined.","3, as indicated by the degree of parallelism.","1, the default value when device is configured.","5, as indicated by the last parallelism command."]
对于基站综合维护服务,一级基站的巡检周期为:() ["每月巡检两次","每月巡检一次,另巡视一次","每月巡检一次"]
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