【摘 要】
:
Consider a linear regression model Y =Xβ + z, z ~ N(0.In), X =Xn,p,where both p and n are large but p > n.The vector β is unknown but is sparse in the sen
【机 构】
:
CarnegieMellonUniversityDepartmentofStatistics,BakerHallCarnegieMellonUniversity,Pittsburgh,PA15217
【出 处】
:
The Third IMS-China International Conference on Statistics a
论文部分内容阅读
Consider a linear regression model Y =Xβ + z, z ~ N(0.In), X =Xn,p,where both p and n are large but p > n.The vector β is unknown but is sparse in the sense that only a small proportion of its coordinates is nonzero, and we are interested in identifying these nonzero ones.We model the coordinates of β as samples from a two-component mixture (1-)vo + π, and the rows of X as samples from N(0, 1/nΩ), where vo is the point mass at 0, π is a distribution, and Ω is a p by p correlation matrix which is unknown but is presumably sparse.
其他文献
[莫扎特](Wolfgang AmadeusMozart,1756-1791)奥地利伟大作曲家,维也纳古典乐派音乐大师。1756年1月27日生于奥地利萨尔斯堡城一个音乐家的家庭,父亲是著名的小提琴演奏家、
Despite the thriving development of variable selection methods in recent years,modeling and selection of high and ultrahigh dimensional censored regression
当常宽的名字从报纸的铅字中蹦出来时,歌迷们的心目中很快就排上一颗崭新的星座。但对他后来那鲜为人知的经历却了解甚少。自第十六届世界音乐节载誉归来,他不像有些歌手那
The main aim of this paper is to analyze the numerical method based upon the spectral element technique for the numerical solution of the fractional advection-d
伊格尔顿认为人看待自身有两种感觉,即作为主体的来源与作为客体的代理人.这两种感觉的自我矛盾在语言等五官感觉中互相碰撞、变化和转换,其背后体现了个体与社会之间的根本
A general dynamical cluster identification framework including both modeling and computation is developed.The earthquake declustering problem is studied to
中商盛佳国际拍卖有限公司即将举行’96秋季拍卖会。拍卖会参拍的840余件珍贵拍品中,前中国国家主席刘少奇的夫人王光美的五件藏品格外引人注意。 王光美参拍的珍贵藏品中,
In this report, I will introduce some of our recent work in sequential analysis.I will propose three test methods which perform well in terms of the average
城市功能区识别对于城市管理规划、动态监测、未来发展布局来说,是极为重要的参考和补充,是城市规划发展的有效辅助决策工具。以长沙城区为例,利用核密度法、局部热点分析等方法,结合公开地图(OSM)路网数据与关注点数据对功能区进行识别,并将识别结果用于长沙城区城市功能区分布与城市商业空间格局分析中。研究结果表明:利用OSM路网划分研究单元使城市功能分区更加合理;长沙城区主要为混合功能用地,以商业—公共为主