复杂性科学及电力系统复杂性

复杂性科学作为2 1世纪的科学令世人瞩目,受各界垂青。电力工业作为复杂的系统其运行管理面临复杂性科学的挑战。为此,本文首先介绍复杂性科学的基本思想,然后论述电力系统的复杂性,提出电力系统复杂性研究对策。这对电力科学研究、学科建设、电力体制改革和电力工业发展都有促进指导意义     

技术创新与产业集群系统演化

以复杂系统及其演化的一般规律为基础分析产业集群,指出它是一个演化复杂系统,进而从演化复杂系统模型将系统内部的各层次以及系统环境联系起来,既研究微观要素的学习与创新,又探讨由此诱发的整个产业集群系统结构和功能演进。     

解读影视艺术的审美特征

影视艺术在美育中有重要地位。影视艺术的审美特征 ,其一是影视艺术审美的直觉性 ,影视艺术的鉴赏首先是一种直觉的审美 ,影视以丰富的表现手段创造直觉美 ,以画面与声音的交融强化直觉美。其二是影视艺术审美层次的复杂性 ,多种流派、多种文化以及良莠不齐的影视作品共存是主要原因。     

中小学教师职业认同感及影响因素研究——基于深圳市宝安区的调查

教师是教育改革的主体,增强教师职业认同感有助于促进教师专业发展,改善区域教育质量。通过对深圳市宝安区教师职业认同感及其影响因素调查研究发现,宝安区教师职业认同感处于中等水平,教师生存压力较大,工作具有复杂性,培训满意度较高。教师职业认同感及影响因素存在性别、学校性质、学段、教龄和职称上的差异,并受教师地位、生存压力、工作复杂性和培训满意度等因素的影响。为增强教师职业认同感、促进教师专业发展,提出以下建议：加大经费投入,增强教师职业认同感;强化制度保障,激发教师发展动力;分层分类培训,促进教师专业发展;构建人文校园,营造教师职业认同氛围。     

Social Network Analysis for Analyzing Groups as Complex Systems

ABSTRACT

The introduction and application of social network analysis, a method seen as superior to experimental or single-system research design for showing group change, examined group dynamics and change over time using a hypothetical example of an Internet group for gays and lesbians. Rather than utilizing traditional definitions of independent and dependent variables, the analysis utilized hypothetical data with nodes or individuals, ties, and the relationships they formed. The recently developed computer program NodeXL provided diagrams and statistics that demonstrated node and tie variation and individual and group development over time. Discussion demonstrated the utility of such diagrams for research and practice.     

复杂性与社会经济系统建模

复杂性是当前学术研究中的一个热点，由于缺乏严格的形式化理论，至今尚未形成统一的定义。文章从系统理论的处理技术的发展过程着手，直面社会经济系统的复杂现象，探讨了目前处理复杂性的可能手段和不足之处，认为理论和现实之间的矛盾主要来自如何应对系统的结构性变迁问题。经典的系统理论致力于特定时刻系统与边界的划分，通过对各部分之间因果逻辑关系的分析，建立的动态系统模型无法克服牛顿还原论的影响。只有从方法论和认知论的高度，重新审视我们的理论范式；关注进化理论和还原论方法的结合，并借助现代计算机的强大运算能力，似乎是一条可资借鉴的道路。     

On the information-based measure of covariance complexity and its application to the evaluation of multivariate linear models

This paper introduces a new information-theoretic measure of complexity called ICOMP as a decision rule for model selection and evaluation for multivariate linear models. The development of ICOMP is based on the generalization and utilization of the covariance complexity index of van Emden (1971) in estimation of the multivariate linear model. ICOMP is motivated by Akaike's (1973) Information Criterion (AIC), but it is a different procedure than AIC. In linear or nonlinear statistical models ICOMP uses an information-based characterization of: (i) the covariance matrix properties of the parameter estimates of a model starting from their finite sampling distributions, and (ii) the complexity of the inverse-Fisher information matrix (i-FIM) as a new criterion of achievable accuracy of the model As a result, it provides a trade-off between the accuracy of the parameter estimates and the interaction of the residuals of a model via the measure of complexity of their respective covariances. It controls the risks of both insufficient and overparameterized models, and incorporates the assumption of dependence and the independence of the residuals in one criterion function. A model with minimum ICOMP is chosen to be the best model among all possible competing alternative models. ICOMP relieves the researcher of any need to consider the parameter dimension of a model explicitly. A real numerical example is shown in subset selection of variables in multivariate regression analysis to demonstrate the utility and versatility of the new approach.     

复句的系统复杂化与自繁殖

文章研究表明,偏正复句存在着有序的系统复杂化和自繁殖活动。它从联合领域的承接复句跨界向偏正领域的因果复句偏移开始。假设关系是在继承因果联系的基础上,由当下因果事态向预期因果事态变异而成,其所建立起的因果预期联系,为偏正复句的继发偏移补充了必备的逻辑基础。接下来,偏正复句通过模态变异、顺逆变异、项目变异、标记替换,更加活跃地以家族相似关系向其他各类型偏移。在偏移中,常量和变量的选择常发生变化,当一次繁殖成功后,新繁殖的复句类型便选择新的常量和变量,进行再度扩张,从而构成复句类型的链式演化。