上世纪60年代,Herbert Simon 首先提出了复杂系统具有模块结构特性的概念。而针对社区的研究实际上是从子图分割问题演化而来,Kernighan-Lin 提出的二分算法使得子图分割问题逐渐成为当时图挖掘领域关注的重点。另外,在社会学领域,社会学家也发现社区结构在各种复杂网络中的普遍存在性。进入21世纪后,社区的研究开始被研究者所重视,而近年来随着社交网络的崛起,这一领域的关注度已大大提升。下列哪种社区发现算法提出时间最晚?
【单选题】In my hometown, the old over 100 years old __ not only by their family but also by the government . A. B. good care of C. is taken good care of D. are take good care of
【单选题】The cross elasticity of demand for good X with respect to the price of good Y is negative. Good X is a normal good and good Y is an inferior good. The supply of good X is perfectly elastic. A rise in ...