Linear restrictions and two step least squares with applications

In this paper we consider the full rank regression model with arbitrary covariance matrix: Y = Xß + ε. It is shown that the effect of restricting the information Y to T = A′Y may be analyzed through an associatedi regression problem which is amenable to solution by two step least squares. The results are applied to the important case of missing observations, where some classical results are rederived.     

科研开发成果累累，工程应用效果显著

概述宁波大学地基处理中心自成立以来紧密结合宁波市工程建设中的需要，在地基处理、桩基工程质量检测等方面开展的科研开发工作，和取得的成果，这些成果在工程中的应用已取得了良好的经济和社会效益。     

The ?-positive center figure

Based on Gage's notion of a “positive center” of a planar convex set, an ε-positive center figure is defined, constructed, and illustrated through example. The existence of an ε-positive center point, and the convexity of the ε-positive center figure, is conjectured.     

高速数据采集系统中缓存区的设计

本文讨论了高速数据采集系统的设计，对如何利用低速ＳＲＡＭ来替代ＤＡＳ中的高速ＲＡＭ作了重点分析     

FIRST ORDER QUASILINEAR EQUATIONS IN SEVERAL INDEPENDENT VARIABLES WITH SINGULAR INITIAL DATA L~p（P＜∞）

ＦＩＲＳＴＯＲＤＥＲＱＵＡＳＩＬＩＮＥＡＲＥＱＵＡＴＩＯＮＳＩＮＳＥＶＥＲＡＬＩＮＤＥＰＥＮＤＥＮＴＶＡＲＩＡＢＬＥＳＷＩＴＨＳＩＮＧＵＬＡＲＩＮＩＴＩＡＬＤＡＴＡＬ~ｐ（Ｐ＜∞）￥（赵会江）ＺｈａｏＨｕｉｊｉａｎｇ（ＹｏｕｎｇＳｃｉｅｎｔｉｓｔＬａ?..     

刚体平面运动时瞬心两种轨迹间关系的一种证明

给出了刚体在平面平行运动时，刚体瞬心的本体极迹与空间极迹间关系的一种证明方法．     

Correlation Analysis of the Fluorescence Data of Some Benzaldehyde Derivatives by the Dual-Parameter Equation

Ithasbeenrecentlyestablishedthattherearefourcategoriesofpossiblecircumstancesforcorrelati0nanalyses0fradicalreactivitiesandspectralpropertiesbyEq.(l),Eq.(2)andEq.(3)."(I)Bothp0larandspin-del0calisationeffectsaretwortant,O.2l.O.(III)Thespin-delocalizationeffectspredominate,lpmdpJJ'I<0.2.(IV)Nocorrelationcanbeachieved.Wehavef0undthatthebehavi0roffluorescencespectraldataofsomestyrenes,'bycorrelati0nanalysiswiththedual-parameterEq.(…     

NEAX61E的换代产品──NEAX61 Σ程控交换机

ＮＥＡＸ６１Σ程控交换机是ＮＥＣ公司最新开发的换代产品，本文对该产品的结构、特点、性能、指标，以及它的网络接口和信令等做了全面的介绍，是了解ＮＥＡＸ６１Σ系统的重要资料。     

Asymptotic theorems for estimating the distribution function under random truncation

Representation theorem and local asymptotic minimax theorem are derived for nonparametric estimators of the distribution function on the basis of randomly truncated data. The convolution-type representation theorem asserts that the limiting process of any regular estimator of the distribution function is at least as dispersed as the limiting process of the product-limit estimator. The theorems are similar to those results for the complete data case due to Beran (1977, Ann. Statist., 5, 400–404) and for the censored data case due to Wellner (1982, Ann. Statist., 10, 595–602). Both likelihood and functional approaches are considered and the proofs rely on the method of Begun et al. (1983, Ann. Statist., 11, 432–452) with slight modifications.Division of Biostatistics, School of Public Health, Columbia Univ.     

国内甚高频水情遥测系统

本文阐述了国内甚高频水情遥测系统的结构特点、功能、组成与工作原理，并对遥测系统普遍存在的问题提出了建设性的见解。文中所述的水情遥测系统是国内近２０年来研制出的典型实例，它得到了广泛地应用。