作者:张洪瀚; 姜娇娇 期刊:《中国信息界》 2007年第17期
随着电子商务网站商品信息量的增加,目前的商品搜索的很多弊端已经显现出来,它已经不适合电子商务的高速发展。本文将提出基于数据挖掘技术的个性化商品推荐的模型。它具有发掘潜在客户,增加销售机会的功能。并改进了其中的Apriori算法,改进后的算法我们暂称为New—Apriori,它具有更高的效率和准确度。
作者:Hamsa; Thota 期刊:《创新与创业管理》 2011年第01期
The Product Development and Management Association(PDMA)comparative performance assessment studies(CPAS)teach us that the new product development(NPD)and innovation management practices continue to evolve.However,advances in the practice of NPD and innovation did not yield significant increases in new product success rates.However,the PDMA 2003 CPAS reported a significant difference in the succe...
据英国New Scientist,2005,187(2507):16报道,在一个古老的墨西哥湖畔发现的人类足迹的年代已被鉴定为距今4万年前,这很可能意味着人类至少要比原先所想的早3万年进入新世界。
据英国New Scientist,2007,194:12报道,匈牙利布达佩斯粒子与核子物理研究中心的科学家认为,在密度极大的恒星所营造的巨大引力场中,有可能发现第五维时空的踪影,这将会帮助解答来自于遥远星系神秘粒子的起源问题。
据2005年9月14日英国New Scientist的网站报道.一国际天文观测小组发现一例显得无宿主星系的孤独类星体HE0450—2958。该小组是通过哈勃空间望远镜和欧洲南方天文台的大口径望远镜发现的。
据英国New Scientist,2007.196(2629):16报道,根据量子力学,一锅由微观粒子组成的“量子汤”在被观察前处于各种概率线性叠加下的不确定状态.而确认这锅“汤”的“沸腾”状态有赖于观察者对它的“最终一瞥”。对于原子来说同样如此:当对其进行仔细观察时.它们竟然就不发生衰变!对于此项奇异性质的开发利用或许能帮助人们克服制造“量子计算机”中的最大障碍。
据英国New Scientist.2008,198(2662):12报道,当短跑运动员在奥运会跑道上全力冲刺时,跑得最快的选手却未必是最终的金牌获得者。这是因为发令枪会使得处于内侧跑道的选手(也就是更加靠近发令枪的选手)拥有额外优势:他们听到枪声更快、更响,因而起跑反应也更为迅速。
据英国New Scientist.2008.199(2663):11报道,以色列理工学院的科学家达多(S.Dado)提出了一种1射线暴的新模型。
据英国New Scientist,2005,188:19与2007,194:10报道,2005年初,英国皇家学院的马盖若(J.Magueijo)和兰德(K.Land)二人在仔细审视威尔金森微波各向异性探测器(WMAP)所获得的天图时发现,前此未预料到的图中热斑和冷斑有排列成行的倾向,计有两对冷、热斑相间排列的四极各向异性和三对冷、热斑相间排列的八极各向异性。
据英国New Scientist.2005.185(2487):14报道,一头腿上覆有巨大羽毛的中国小恐龙的化石震惊了古生物学界。这枚在内蒙古的道虎沟化石床发现的足羽龙化石显示出足羽龙和目前已知最古老的鸟——始祖鸟一样酷似鸟类。然而,足羽龙的发现者却认为它可能比始祖鸟更古老。
据英国New,Scientist,2005,186(2496):21报道,量子计算中的一项障碍并不如原先认为的那样令人气馁。
据英国New Scientist,2006,191(2566):8报道,美国三位科学家将弃置了近一个世纪的以太赋予了新的形式用于解决暗物质以及暗能量之谜。
作者:方陵生(编译) 期刊:《世界科学》 2006年第10期
多年来,神秘的月亮困惑着众多的科学家,月亮的存在违背了已知天体物理学的原理,其起源也没有什么比较合理的解释——事实上,它不应该在那里。以下是澳大利亚科普杂志《New Dawn))(新曙光)与畅销书作者克里斯托弗·奈特就他新出版的《谁建造了月亮?》一书,以及书中惊世骇俗的结论进行的访谈记录。
作者:Meng; Pengfei 期刊:《学术界》 2019年第11期
since the establishment of the People’s Republic of China,the central leader-groups from generation to generation have been continuously exploring and innovating Marxist political party theory in terms of its value target,ideological construction,working style,and organization developments.This process can be categorized into five stages:the founding stage in Mao Zedong’s era,the development s...
作者:Jianping; Fu 期刊:《医用生物力学》 2019年第A01期
Early human embryonic development remains mysterious due to drastic species divergences between humans and othermammalian models and limited accessibility to human embryo samples. Recent studies from my laboratory and others haveshown that under suitable culture conditions human pluripotent stem cells ( hPSCs) can undergo intricate morphogenetic eventsand self-organize to form patterned human em...
作者:FU; Yi; QIU; Liu-dan 期刊:《艺术研究》 2019年第10期
In contemporary society,college students are groups that have relatively high level of education and are more sensitive to social hot events.Through the investigation of 312 college students in Xiasha Hangzhou,the investigation shows that:Firstly,students and teachers attach great importance to the application of social hot events in the political class of college.Secondly,political and economic...
The outbreak of the global economic crisis has announced that the world economy has entered a period of great adjustment and transition. The superposition of this gr eat era background and China’s current economic factors has decided that China’s economy has entered a new normal. In the five years of the thirteenth Five-Year Plan, under the new normal, we have seen a series of significant and ...
作者:Xia; Liping 期刊:《和平》 2018年第02期
In his report to the 19th National Congress of the Communist Party of China(CPC),General Secretary Xi Jinping proposes to'forge a new form of international relationship featuring mutual respect,fairness and justice,and win-win cooperation,and build a community with a shared future for mankind',1 which points out the direction for the a major country diplomacy with Chinese characteristics in a ne...