GQPSO算法在动态环境优化问题中的应用

动态环境优化问题求解是近年来优化领域的研究热点。为了解决动态环境优化问题中种群的早熟收敛现象,寻找3种学习策略更新种群中的吸引子,提出一种基于高斯分布的量子行为粒子群优化算法（GQPSO）。在改进算法中,种群中粒子的吸引子由高斯公式产生。通过对比3种吸引子对算法的影响,确定了产生吸引子的最佳更新公式。此外,GQPSO算法中粒子的位置由概率密度函数以一定概率分散在搜索空间内,处于束缚状态,因此可以增加种群多样性以达到全局搜索,从而提高GQPSO算法在求解动态环境优化问题上的收敛能力。     

基于搜索空间分割的协同进化遗传算法

针对经典协同进化遗传算法在优化大决策空间问题时计算复杂度较高的问题,提出了一种基于搜索空间分割的协同进化遗传算法,其基本思想是：将种群分割为不同规模的子种群,在进化过程中应用ε自适应方法调整子种群规模。复杂度分析和数值实验表明,改进后的算法可降低算法计算量,提高算法的优化效率。     

试论高校虚拟社区的自组织演进

高校虚拟社区是一个自组织存在物。高校虚拟社区始终处于一种动态的演进过程,负熵流是其有序演进的动力源泉,规则是保证其有序化程度的序参量,精神文化的意义是虚拟社区内稳态形成的吸引子。     

低碳经济背景下技术创新和制度创新动态推进模型研究

低碳经济已经成为全球发展新趋势,其核心动力是技术创新和制度创新。在推进低碳经济发展过程中,技术创新和制度创新之间的相互作用关系与生物种群之间的共生关系极为类似,因而本文通过引入生物学中解释不同生物种群共生的logistic模型,描述技术创新子系统和制度创新子系统在独立、竞争和协同模式下动态推进经济发展达到稳定状态的过程,并给出动态均衡所需要的条件及其经济意义。     

逆向归纳与进化动态博弈(英文)

逆向归纳法是求解子博弈精炼纳什均衡的有效手段 ,通过把每一个参与人用一个群体来代替 ,把博弈转化为群体博弈 ,即用进化观点对逆向归纳过程进行了深入分析 ,认为子博弈精炼纳什均衡是在极限情况下的完美信息动态博弈的唯一进化稳定的结果     

协同进化多生境遗传算法

为了提高多生境遗传算法的优化效率,提出了一种基于协同进化的多生境遗传算法,其基本思想是：将种群分割为若干子种群,每个子种群采用合作型协同进化方法独立进化;个体评价采用多生境方法,具体作法为：在对个体的适应值进行共享调整的同时,在选择中采用确定性排挤方法,在替换中采用最相似个体适应度最差个体被替换策略,以维持种群的多样性。数值实验表明,上述算法在维持多生境遗传算法较强全局搜索能力的同时,可适当提高算法运行效率。     

从动态规划算法的应用谈算法设计的教学

动态规划是一种用于求解包含重叠子问题的最优化问题的方法。其基本思想是,将问题分解为相似的子问题,通过子问题的解组合求出原问题的解。动态规划的思想是多种算法的基础,被广泛应用于计算机科学和工程领域。本文通过阐述动态规划算法的求解过程、应用举例,结合教学体会分析了算法设计课程的教学方法。     

元宝山冷杉种群结构和动态的初步研究

对元宝山冷杉种群的大小结构,存活曲线和水平分布格局及动态的研究表明:元宝山冷杉种群在森林群落中具有增长型的繁殖潜力而表现了衰退型的演替趋势;种群分布格局由集群分布演变为均匀分布.元宝山冷杉种群动态受环境影响相当明显.种群生态学研究对人为调节种群发展具有重要意义.     

外来入侵植物种群的形成及其危害

外来入侵植物的入侵要经历一个从个体到种群的过程 ,只有形成种群后才能对自然生态环境造成危害。对外来入侵植物种群形成的原因、过程和后果进行研究 ,能更好的认识和防治外来入侵植物对生态环境的危害。     

算法设计与分析课程中最大子段和问题的教学探讨

介绍算法设计与分析课程中最大子段和问题的动态规划解法,其求解思想是先求给定序列中以每一个元素为尾元素的最大子段和,然后其中的最大者便是整个序列的最大子段和．从两个不同的角度分析最大子段和问题最优解的构造方法,给出最大予段和问题的动态规划算法,并分析算法的时间复杂度。通过这一问题的讲解,有助于学生明确动态规划方法的解题步骤,掌握动态规划算法的设计步骤,     

A process model of writing development across the life span

In this article, we provide an overview of writing development from a product perspective and from a process perspective. Then we discuss modifications of the most influential process model of skilled adult writing to explain beginning and developing writing, including a proposed developmental sequence of the emergence of cognitive processes in writing. Next we report the results of two recent dissertations by the second and third authors supervised by the first author aimed toward contrasting developmental issues: (a) specifying the algorithms or rules of thumb beginning and developing writers may use during on-line planning; and (b) investigating the further development of writing processes among skilled adult writers. In the first study, development was conceptualized as a linear process across age groups. In the second study, development was conceptualized as a horizontal process within skilled adult writers who expanded their expertise. Finally, we consider the developmental constraints and the instructional constraints on writing development and argue for a model of writing development in which endogenous and exogenous process variables interact to determine the outcome of the writing development process.     

基于 ANFIS 的麦蚜种群模型的建立与分析

基于不同温度和大麦种群不同生长阶段（软组织、叶片发育阶段等）的麦蚜种群实验数据,首先利用自适应神经模糊推理系统（ ANFIS）,分别建立高斯型、三角型和梯型隶属度函数的麦蚜种群内禀增长率的T-S初始模糊模型。然后在误差允许范围内,应用ANFIS具体训练流程对相应初始模型进行修正,并通过误差选择与原始数据拟合程度最好的模型,最后利用数值模拟验证结论的正确性。     

Zwischen Seniorität und Alterität

Demographic changes are leading to an altered population structure and subsequently to changes in the age structure of potential participants in educational training. Adult education has reacted to this by developing special provisions for older participants and a concept of intergenerational learning provision for different generations. Arranging such intentional intergenerational processes is indeed no small task for adult education. This contribution will look at this challenge more closely. To this aim, the orientations of professional and non-professional adult educators and participants in intergenerational learning processes will be reconstructed in a qualitative investigation. It can be shown that the andragogic skill of adult educators is a pre-requisite for the facilitation of learning processes, which are explicitly intergenerational.     

Basic concepts of CNS development

Some basic principles of the development of the central nervous system (CNS) are reviewed and their implications for both normal and abnormal behavioral development are discussed. The goals of this review are: to provide a set of concepts to aid in the understanding of the variety of complex processes occurring during CNS development, to illustrate how these concepts contribute to our knowledge of the normal anatomy of the adult brain, and to delineate how modifications of normal developmental processes by traumatic injury, by environmental or experiential influences, or by genetic variations may lead to modifications in the resultant structure and function of the adult CNS.     

Career Decision-Making Self-Efficacy,Perceived Stress,and an Integrated Model of Student Persistence: A Structural Model of Finances,Attitudes, Behavior,and Career Development

In response to the extraordinarily diverse adult student population present in college today, a new structural equation model adapted from Cabrera et al. (1993) integrated model of student retention was identified with the addition of three variables: career decision-making self-efficacy (CDMSE), perceived stress and financial difficulty. The study examined the persistence of students (N = 937) 24 years of age or older studying in two-year and four-year degree programs, by combining data from a survey questionnaire and institutional records. Twenty-three variables were included, twelve endogenous variables and eleven exogenous variables, within a nonrecursive structural equation model. The exogenous variables controlled for the background characteristics of the population of adult students examined. Of the twelve endogenous variables of a new integrated model of student persistence, CDMSE, a career development construct related to the perceived vocational futures and career-related tasks of adult students has the widest range of influence among the endogenous variables.     

多对独立杂合基因群体熵变的一个定理

研究具有多对独立杂合基因的群体的基因型熵的逐代演变规律,推导出适合任意自交率的模型．证明了某一世代的群体基因型熵与该群体的独立杂合基因对数成正比。     

成人教育管理的危机及改革创新

进入21世纪,随着我国综合国力的不断提高和社会经济的高速发展,时代对我们的劳动者提出了更高的要求。亟需把我国由人口大国转变为人力资源大国。因此,高等成人教育担负着重大的责任。但是我国的成人教育管理工作存在很大的弊端,需要我们对成人教育管理进行改革和创新。     

Profiles of cognitive precursors to reading acquisition. Contributions to a developmental perspective of adult literacy

This article discusses conceptual and empirical elements concerning the development of cognitive processes that function as precursors of reading, and their association with the acquisition of reading skills in an adult population participating in literacy courses. It connects emergent literacy research with historical–cultural and bioecological concepts. Subsequently, it focuses on the problem of the development of profiles of cognitive reading precursors. A sample of 63 Chilean adults was studied through a growth/learning curves approach. The study replicated previous results indicating the existence of three major profiles of these cognitive precursors. Together, these precursors are associated with significantly different learning curves beyond the effect of each precursor considered separately. In addition, it established a negative association between initial phonological awareness and the rate of reading acquisition during the course. It has been claimed that an individual's participation in specific cultural activities throughout his/her life influences the development of the precursors of reading. Based on a complementary biographical study of a subsample of participants, preliminary evidence is presented that supports this link.     

Go your own way: lifelong learning and reflexive autobiographies in postmodernity

This article provides an autobiographical account of two adult educators engaged in what may be seen as an identity crisis for contemporary adult education. Through our autobiographical analysis, we address the question of what it means to be an adult educator or to practice adult education in circumstances where dedifferentiation has taken hold under the sign of lifelong learning. First, we outline the challenges that are taking place to many of the practices and institutional structures of adult education. At the heart of these, we argue that there is an intensification of reflexivity wherein the identity crisis with which we are working is both a condition for and a response to increasing individualization and reflexivity. Second, we illustrate the link between reflexivity and identity by drawing on our own autobiographies. Here we exemplify the processes we argue to be operating under the sign of lifelong learning through the exploration of our own autobiographical bricolages. Third, we explore the cultural conditions which give rise to the similarities and differences in these bricolages, in particular the rise of the new middle classes, the increased significance of popular culture and the development of postmodern positions.     

Provision of quality education in the context of Syrian refugee children in the UK: opportunities and challenges

Abstract

While existing research has shown the importance of the three interrelated domains of the wider policy, the school and home/community environments in the development of quality education for learners, this literature does not fully capture the experiences of the refugee population. In this article we focus on a group of Syrian refugees who came as part of the first large cohort that was welcomed in the UK in December 2015. We adapt Tikly’s quality education frameworks and develop a model that highlights not only the importance of the three intersecting environments, but also the specific inputs/processes that are critical to achieving quality education for refugees. In so doing, we stress the critical role of English as a tool for refugee children’s inclusion and integration in schools. Consequently, the contribution of the paper is an understanding of the inputs/processes that are key to the development of quality education for migrant/refugee children.