金融危机10年来中国股市动态演化与市场稳健研究——一个基于复杂网络视角的实证

将复杂网络理论最小生成树（MST）算法和滑窗分析相结合，在2008年全球金融危机和2015年中国股市震荡的背景下，以2003年至2017年的上证A股收益率数据作为实证样本，构建股票市场动态关联网络，并从网络节点移除和连边变化两个角度出发，对其在不同时期的动态演化特征和市场稳健性质进行探讨。研究结果表明：网络结构整体上在金融危机之前和之后较为松散，而在金融危机和股市震荡期间则变得非常紧凑，节点的度分布和影响强度分布更加聚集。这意味着在金融危机和股市震荡期间，系统重要性公司的影响力持续增强，其股价的变化对其它公司将产生更为显著的影响；不同类型的事件对股市网络连通性和稳健性的影响程度不同，区域性事件（股市震荡）比全球性事件（金融危机）对市场的冲击更大；短期来看，金融危机和股市震荡对网络连边的稳健性并没有造成太大的冲击，整个研究时段网络的存活比率都维持在较高的水平。但随着步长的增加，网络的存活比率急剧下降，这意味着股市网络相关结构的长期稳健性是减弱的。     

Schulentwicklung — ein kritischer Blick auf ein aktuelles Phänomen

School developmement, a critical perspective Today, everything dealing with school becomes subsumed under the keyword school development. The demand for school development is raised by two sides: on the one hand by political and social groups, on the other by schools themselves. In this way, very different ideas and demands on school development arise. School as institution and schools as highly complex organizations can’t be reformed with programs derived from economy and management methods. The legal and social context as well as school theories, organizational culture, internal structures and the self concept of teachers constitute the frame, in wich school development takes place as a continual process and whose neglect causes frustration and failure.     

Inter‐professional working in child protection with families with long‐term and complex needs

Within the United Kingdom there is growing awareness of the need to identify and support the small number of children who are living in families experiencing multiple problems. Research indicates that adverse experiences in childhood can result in poor outcomes in adulthood in terms of lack of employment, poorer physical and mental health and increases in social problems experienced. It is acknowledged that most of these children are known to child welfare professionals and that some are referred to social services, subsequently entering the child protection system. This paper reports research conducted with 28 experienced child welfare professionals. It explores their views about families known to the child protection system with long‐term and complex needs in relation to the characteristics of children and their families; the process of intervention with families; and the effects of organisational arrangements on practice. The research indicates that these families are characterised by the range and depth of the problems experienced by the adults, such as domestic violence, mental health difficulties and substance misuse problems, and the need for professionals to have good inter‐personal skills and access to specialist therapeutic services if families are to be supported to address their problems. Copyright © 2008 John Wiley & Sons, Ltd.     

复杂知识网络的结构特征对知识流动的影响

利用Jackson算法构建了知识网络的计算实验模型.该知识网络模型具备典型社会网络的五大特征.通过仿真试验探讨了单个虚拟的知识网络中具有不同属性的知识结点其知识水平演化的规律,两个具有不同知识水平的虚拟网络间建立知识合作联系的不同机制对落后网络和先进网络间知识扩散程度的不同影响,以及落后网络的网络密度和连接权重对网络间知识扩散程度的不同影响.     

一种简单的Internet级联故障模型

介绍了Internet动力学和拓扑特征,分析了引发Internet级联故障的原因,提出了一种简单的Internet级联故障模型(ICFM).仿真实验验证了Internet存在的自组织临界特性,并进一步探讨了该特性可能的成因.该模型将有助于对Internet级联故障的检测和控制技术的研究.     

副词“接连”和“接连”句

文章主要研究副词“接连”的语义和句法功能，兼与“连连”、“一连”、“连续”、“陆续”作一比较。“动作或性质的相接或紧接性”是“接连”区别于“连连”、“一连”、“连续”、“陆续”的重要的语义特征。对“量”的强调，从极强的主观性到相对的客观性，形成了一个“连连〉一连〉接连〉连续〉陆续”的连续统，“接连”处于这个连续统的中间地带。     

尽孝的艰难与动人——论夏洛特·勃朗特的孝道情结

夏洛特·勃朗特及其作品的主人公大多是以自强不息、追求平等独立、叛逆传统和反抗父权的女性形象的姿态呈现于我们面前.其实,在某种意义上她们多是贤慧的妻子或孝顺的儿女.本文旨在阐述夏洛特·勃朗特道德品行中传统的一面,还原其传统女性及孝顺女儿的形象.     

学科生态系统模型的建构和解读

本文把学科当作一个生态系统进行研究,首先建立起了学科的组织层次系统、学科的生物圈系统、学科圈的反馈系统等三个生态系统模型,并在此基础上提出了学科生态环境和学科主体间性的问题,指出了学科之间适应与发展、平衡与失衡、共生与竞争的成长机制,最后,还在生态视野下对学科生态系统平衡进行了定义。     

Biodiversity action plans as a way towards local sustainable development

Local action for biodiversity is essential to ensure better conservation status for biodiversity and maintain ecosystem services. In many places the rich biodiversity is still relatively untouched and represents an outstanding asset for local sustainable development. The loss of biodiversity occurs mainly because of rapid changes in land use, urban sprawl, infrastructure development, acidification, eutrophication, desertification, overexploitation, intensification of agriculture, tourism development and climate change. There is a clear need for a more flexible, people-oriented and visionary approach for sustainable use of biodiversity resources. This article concerns “Local Biodiversity Action Plans”, which provide a comprehensive and integrated approach to biodiversity and ecosystem services for the sustainable development of rural municipalities and their local communities. Although biodiversity action planning is not a new concept, bringing a plan to life has significant societal benefits with innovative solutions to help biodiversity conservation while entailing close interaction of science, policy and society. This approach was developed together with project partners and local communities in selected regions of the Western Balkans and it benefits from a range of stakeholders, including social and natural scientists, practitioners, elected representatives of the local communities and end users in the frame of a participatory approach. The conclusion of this article discusses the role of communication and outlines the critical success factors and the challenges ahead for the future.     

氨汞化合物的性质研究

通过实验讨论了二价汞盐与氨反应生成的氨汞沉淀在过量氨水 ,铵盐及氨性缓冲溶液和常见酸中的溶解性 提出 :在NH3·H2 O_NH4NO3 溶液中 ,二价汞与氨水反应生成可溶性氨配合物 ,沉淀溶解 ;在H 与配离子Cl-,Br-,I-,SCN-等共存时 ,氨汞沉淀也能形成配合物而溶解 ;单一Cl-的存在不利于氨汞沉淀的溶解 同时 ,还从配位平衡 ,硬软酸碱理论 ,结构等方面对实验现象作了简要解释