智能电网涉及的关键技术

智能电网关键技术主要包括量测、通信、信息管理、调度、电力电子和分布式能源接入等方面。借助美国智能电网研究应用情况的信息,对智能电网技术实现的功能进行了归纳、评述。     

论电子政务与民族地区政府职能转变

我国民族地区政府因为其职能和行政环境与其他地方政府相比具有明显的特殊性和复杂性，其自治政府职能的转变更需要电子政务的支持。本文主要阐述了民族地区政府职能转变的重点以及电子政务对政府职能转变的推动作用，给民族地区政府电子政务与职能转变建设提供参考。     

微处理器中三角函数及反三角函数的计算方法

本文介绍了一种在微处理器中用二进制定点运算和查表相结合的方法简单实现三角函数和反三角函数运算的方法。与浮点运算方法相比，可大大提高微处理器的运算速度。     

A review of recent developments in geostatistics

This paper reviews developments in geostatistics in the period 1987 to mid-1991. The developments which are regarded as significant by the author fall broadly under six headings: simulation, indicator kriging, interval estimation, applications to hydrocarbon reservoirs and hydrology, incorporation of prior information in spatial estimation, and fuzzy kriging. A summary of significant contributions under each of these headings is given together with an assessment of their importance and application.     

Riesz bases and exact controllability of C0-groups with one-dimensional input operators

This paper considers linear infinite dimensional systems with C₀-group generators and one-dimensional admissible input operators. The exact controllability and Riesz basis generation property are discussed. The corresponding results of Jacob and Zwart (Advances in Mathematical Systems Theory, Birkhäuser, Boston, MA, 2000) under the assumption of algebraic simplicity for eigenvalues of the generator are generalized to the case in which the eigenvalues are allowed to be algebraically multiple but with a uniform bound on the multiplicity.     

Orthogonal polynomials and natural exponential families

Summary There exist several different characterizations of the class of quadratic natural exponential families onR, two of which use orthogonal polynomials. In Feinsilver (1986), the polynomials result from the derivation of the probability densities while Meixner (1934) adopts an exponential generating function. In this paper, we consider multidimensional extensions of their results which still yield quadratic or simple quadratic natural exponential families.     

走向未来的电子图书馆

简要介绍未来电子图书馆的建立基础、功能特征和馆员的职责。     

Using Gröbner bases for finding the logarithmic part of the integral of transcendental functions

We show that Czichowski’s algorithm for computing the logarithmic part of the integral of a rational function can be carried over to a rather general class of transcendental functions. Also an asymptotic bound on the number of field operations needed is given.     

虚拟蜜网核心功能剖析与实例部署

传统蜜网硬件利用率低、配置复杂、管理难度大等缺点日渐凸显,如何解决这些问题越来越受到研究人员的关注。针对蜜网当前面临的问题,提出了使用虚拟技术构建蜜网的必要性。通过对蜜网关键技术的研究,分析并给出蜜网核心功能在虚拟系统中的工作流程,在此基础上设计并实现了一种虚拟蜜网的解决方案。实验结果表明,建立的虚拟蜜网工作良好,并在一定程度上解决了传统蜜网在硬件利用率、配置和管理等方面存在的问题。     

Analytical solution of the linear fractional system of commensurate order

A useful representation of fractional order systems is the state space representation. For the linear fractional systems of commensurate order, the state space representation is defined as for regular integer state space representation with the state vector differentiated to a real order. This paper presents a solution of the linear fractional order systems of commensurate order in the state space. The solution is obtained using a technique based on functions of square matrices and the Cayley-Hamilton theorem. The technique developed for linear systems of integer order is extended to derive analytical solutions of linear fractional systems of commensurate order. The basic ideas and the derived formulations of the technique are presented. Both, homogeneous and inhomogeneous cases with usual input functions are solved. The solution is calculated in the form of a linear combination of suitable fundamental functions. The presented results are illustrated by analyzing some examples to demonstrate the effectiveness of the presented analytical approach.