关于线性方程组理论的若干注记

给出齐次线性方程组与非齐次线性方程组的基础解系若干注解，并举例说明其在解题中的应用。     

Towards a self healing information system for digital libraries

INTRODUCTION Digital libraries that have received wide atten- tion in recent years allow access to digital information from anywhere across the world, and have become widely accepted and even preferred information sources in education, science, and other areas (Marchionini and Maurer, 1995). The rapid growth of Internet and the increasing interest in development of digital library related technologies and collections (Bainbridge et al., 2003; McCray and Gallagher, 2001) helped accelerat…     

Predictive control of a class of bilinear systems based on global off-line models

INTRODUCTION Bilinear systems are a kind of important nonlinear systems with relatively simple structure, and many industrial processes can be described as a bilinear system. Thus research on the control of this kind of systems is very important. On the other hand, model predictive control (MPC) (Clarke et al., 1987) has been widely used in industrial applications and many predictive control methods focusing on bilinear systems are emerging (Bloemen et al., 2001; Fontes et al., 2004; He…     

教育装备理论框架构建浅析

本文在实践的基础上进行深入研究，提出了教育装备领域的研究对象、研究内容，并界定了相关概念，初步提出了教育装备理论体系框架的雏形，为教育装备的全面发展提供了理论参考。     

我国高等学校内部管理体制的变迁

本通过梳理1950-1998年间有关官方献，从历史的角度叙述我国高等学校内部管理体制的变迁，并分析了我国高校学术权力结构目前的状况、特征与未来走向。     

海南岛土壤植被系统中Hg元素的化学地理特征

Hg元素在不同的土壤植被系统中,其化学地理过程的强度、速度和循环的周期长短都不同。研究表明,在海南岛不同的土壤植被系统中,Hg元素的丰度差异明显,其主要是受土壤理化特征、植被类型及其生物量,生长量和Hg元素化学地理特征等因素的制约。     

Understanding Persistence of At-Risk Students in Higher Education Enrollment Management Using Multiple Linear Regression and Network Analysis

Abstract

This article presents research on persistence among at-risk students using network analysis following multiple linear regression (MLR). Data on a population of enrolled undergraduate students at an urban-serving university over several years (P?=?35,239) is tested using multiple linear regression. Variables interacting at different dimensions of the model are analyzed using IBM SPSS Neural Networks (2017) and Cytoscape (2018) to show network linkages. While variables may not be significant in MLR models where anomalies are ruled out, network analysis takes these anomalies into account and reveals complex layers of interactions between and among variables. Findings show that loans of any kind contribute to attrition while financial aid of any kind contributes to persistence and offsets attrition from loans.     

马克思列宁主义关于社会主义与资本主义关系的基本思想

马克思恩格斯充分肯定了资本主义的历史作用,在阐述社会主义是对资本主义继承和发展观点的基础上,提出社会主义代替资本主义是历史的必然。列宁在实践中继承和发展了马克思恩格斯关于“两制”关系的基本思想,提出从资本主义过渡到共产主义是一整个历史时代,帝国主义是资本主义的最高阶段,利用资本主义来建设社会主义。马列主义关于“两制”关系的基本思想不仅为我们提供了认识资本主义的方法,指明了处理“两制”关系的方向,还勾勒了人类历史的发展前景。     

管理信息系统课程的实验教学探索

“管理信息系统”课程综合性、应用性强，理论与实践结合紧密。针对课程的特点，该文重点介绍了对于工业工程专业的管理信息系统课程的实验教学探索，及实验教学的要求和内容。     

空间动力系统的极限集之分类

初步探讨了空间自治系统孤立奇点的分类和稳定性。利用向量场同胚映射的方法，给出了极限集的存在性定理，同时证明了某类奇点和极限集的不可能性，并讨论了极限集的初步分类。