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- Decision trees is a useful tool for data mining, but the design of the optimal decision tree has been proved to be NP hard. 决策树是一种重要的数据开采方法 ;但构造最优决策树是一个 NP困难问题 .
- A self-adaptive chaotic control strategy is incorporated into standard genetic algorithm (GA) because it s NP hard to solve FST. 该模型求解属于NP难题,因此在标准遗传算法(GA)中引入了自适应混沌控制策略。
- The Vehicle Routing Problem (VRP) is a NP hard problem and with the increase of amount of customer, the allocation schemes that can be chosen increase by exponent. 物流配送车辆路径优化问题作为一个NP难题,随着客户数量的增加,可选的配送路径方案数量将以指数速度急剧增长。
- VRP is a typical NP hard problem, and the genetic algorithm (GA) is an adaptive heuristic search method which is considered as the way to solve the NP problems. VRP是典型的NP难问题,遗传算法是一种自适应随机搜索方法,被认为是解决NP难题的途径。
- It is hard to sleep without a cooler in this room. 没有空气调节器,在这间屋里很难入睡。
- John felt it hard to rig out his family. 约翰感到难以为一家大小置备衣着。
- The hard core in the party make all the decisions. 这个党的核心成员决定一切。
- Hard copy is computer output on paper, printing or graphics. 硬拷贝是出现在纸上、印刷上或图表上的电脑输出。
- I scrubbed hard at the stain to see if I could get it off. 我使劲擦这个污迹,看能不能将它去掉。
- It's natural to slack2 off towards the end of a hard day's work. 一天紧张工作快结束的时候有些放松是自然的。
- He pushed hard on the brake pedal to avoid a collision. 他使劲踩下煞车踏板以避免撞车。
- One can not learn a language well unless one works hard. 学好一种语言非下苦功不可。
- Let's collect the sap before its consolidation into a hard mass. 让我们在树液坚固成团之前将之收集起来。
- He owes his opulence to work hard. 他的财富乃辛勤工作得来。
- She was trying hard to disgorge a fish bone. 她拚命想把鱼刺吐出来。
- The emery is a hard metallic substance. 金刚砂是非常坚硬的金属物质。
- Hard training will fit them to run long distances. 严格的训练将使他们能跑长距离。
- Seth really took it hard when his old dog died. 塞思的那条老狗死的时候,他确实怏怏不乐。
- Heavy taxes indispose a citizen to work hard. 重税于国民不愿意辛勤工作。
- It was hard work getting the children off to bed. 哄孩子们去睡可不是容易的事。