关于中值定理“中间点”的渐近性质

文［１］给出了当区间长度趋于无穷大时Ｌａｇｒａｎｇｅ中值定理＂中间点＂的渐进性质。本文首先减弱了文［１］中主要定理的条件，从而改进了文［１］中的结果，然后给出积分中值定理当区间长度趋于无穷大时＂中间点＂的渐近性质．     

Approximate solution of a profit maximization constrained virtual business planning problem

A virtual business problem is studied, in which a company-contractor outsources production to specialized subcontractors. Finances of the contractor and resource capacities of subcontractors are limited. The objective is to select subcontractors and distribute a part of the demanded production among them so that the profit of the contractor is maximized. A generalization of the knapsack problem, called Knapsack-of-Knapsacks (K-of-K), is used to model this situation, in which items have to be packed into small knapsacks and small knapsacks have to be packed into a large knapsack. A fully polynomial time approximation scheme is developed to solve the problem K-of-K.     

Smoothing parameter selection methods for nonparametric regression with spatially correlated errors

When spatial data are correlated, currently available data‐driven smoothing parameter selection methods for nonparametric regression will often fail to provide useful results. The authors propose a method that adjusts the generalized cross‐validation criterion for the effect of spatial correlation in the case of bivariate local polynomial regression. Their approach uses a pilot fit to the data and the estimation of a parametric covariance model. The method is easy to implement and leads to improved smoothing parameter selection, even when the covariance model is misspecified. The methodology is illustrated using water chemistry data collected in a survey of lakes in the Northeastern United States.     

大整数分解的多个多项式二次筛法及其微机实现

通过讨论Silverman提出的多个多项式二次筛法（MPOS），提出了MPQS的计算步骤，并在486微机上实现了MPQS．     

Local likelihood with time-varying additive hazards model

The authors propose the local likelihood method for the time-varying coefficient additive hazards model. They use the Newton-Raphson algorithm to maximize the likelihood into which a local polynomial expansion has been incorporated. They establish the asymptotic properties for the time-varying coefficient estimators and derive explicit expressions for the variance and bias. The authors present simulation results describing the performance of their approach for finite sample sizes. Their numerical comparisons show the stability and efficiency of the local maximum likelihood estimator. They finally illustrate their proposal with data from a laryngeal cancer clinical study.     

A Note on Trend Decomposition: The 'Classical' Approach Revisited with an Application to Surface Temperature Trends

This note reconsiders the 'classical' approach to trend estimation and presents a modern treatment of this technique that enables trend filters which incorporate end-effects to be constructed easily and efficiently. The approach is illustrated by estimating recent Northern Hemispheric temperature trends. In so doing, it shows how classical trend models may be selected in empirical applications and indicates how this choice determines the properties of the latest trend estimates.     

广义预测控制性质研究

研究了带有纯滞后系统的广义预测控制的deadbeat性质,通过系数映射关系,分析闭环系统特征多项式系数为零的条件,给出了带有纯滞后的GPC闭环系统具有deadbeat性质所要满足的条件,为研究有纯滞后的GPC的性质提供了一种基于系数空间映射的新思路.     

矩阵多项式的逆

本文证明了数域Ｋ上矩阵Ａ的多项式的逆仍是Ｋ上矩阵Ａ的多项式,并给出了求矩阵多项式的逆的方法．     

关于完全三部图的色等价性

设Ｇ为简单图,Ｐ（Ｇ,λ）为Ｇ的色多项式。若简单图Ｈ满足Ｐ（Ｈ,λ）＝Ｐ（Ｇ,λ）,则称Ｈ与Ｇ色等价。     

数字下变频中抽取技术研究

讨论了软件无线电接收机中数字下变频处理技术中的CIC抽取滤波器结构原理,分析了CIC滤波器级联ISOP滤波器进行抽取滤波的设计技术。验证了ISOP滤波器对CIC滤波器带内衰减补偿的有效性;采用了CIC抽取滤波器的系统,有效地缩减了窄带FIR滤波器阶数。