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It is easy to see that OvR only needs to train N classifiers, while OvO needs to train N (N-1)/2 classifiers, so the storage overhead and test time overhead of OvO are usually larger than OvR. However, in training, each classifier of OVR uses all training samples, while each classifier of OVO only uses samples of two classes. Therefore, when there are many classes, the training time cost of OVO is usually smaller than that of OVR. As for the prediction performance, it depends on the specific data distribution, which is similar in most cases.　 A government trained assassin in life, A vengeful hellspawn in death. Brought back from the dead to join Hell's army and release his carnage on anyone that may get in his way. Heaven and Hell battle for his already torn soul, while he wanders the alleys protecting the innocent and destroying the corrupt who disrupt the lives of the innocent. In the meantime he faces the tragedy of his death and the fact that he has been sent to Hell and he must also face the reality of losing his wife to an old friend.香儿看看秦旷，转头再看看林聪，迟疑了一会，才小心翼翼地对林聪道：林大哥，我……我想去京城。Goo goo goo goo少女们通过与原书相遇，被原书选中，获得魔法并成为原书使。而本作讲述的就是以成为原书使为目标的见习原书使少女们的，与原书一起编织出的梦与魔法与青春的故事。心理学家克里斯•凯尔文（Donatas Banionis 饰）在飞往索拉瑞斯星之前来到儿时的父母家与当年的索拉瑞斯飞行员亨利•伯顿（Vladislav Dvorzhetsky 饰）见面。伯顿警告凯尔文索拉瑞斯星上会有不可思议的奇事发生，但后者并不以为意。凯尔文离开前，当 着父亲（尼古莱•格陵柯Nikolai Grinko 饰）的面焚毁了自己的个人物品。凯尔文到达索拉瑞斯星附近的太空站后，对科学家奇巴瑞安博士（Sos Sargsyan 饰）之死进行调查，却发现自己多年前已经去世的妻子哈莉（Natalya Bondarchuk 饰）竟突然出现。惊慌失措的凯尔文与太空站上另三位科学家讨论该如何面对怪事，却发现原来每人都深受其扰，不明就里……本片被提名1972年戛纳电影节金棕榈奖，并获同年戛纳电影节评委会大奖和国际影评人协会大奖。