Basic aspects of evolution strategies

Evolution strategies (ESs) are a special class of probabilistic, direct, global optimization methods. They are similar to genetic algorithms but work in continuous spaces and have the additional capability of self-adapting their major strategy parameters. This paper presents the most important features of ESs, namely their self-adaptation, as well as their robustness and potential for parallelization which they share with other evolutionary algorithms.Besides the early (1 + 1)-ES and its underlying theoretical results, the modern ( + )-ES and (, )-ES are presented with special emphasis on the self-adaptation of strategy parameters, a mechanism which enables the algorithm to evolve not only the object variables but also the characteristics of the probability distributions of normally distributed mutations. The self-adaptation property of the algorithm is also illustrated by an experimental example.The robustness of ESs is demonstrated for noisy fitness evaluations and by its application to discrete optimization problems, namely the travelling salesman problem (TSP).Finally, the paper concludes by summarizing existing work and general possibilities regarding the parallelization of evolution strategies and evolutionary algorithms in general.     

化学反应中的非线性现象

本文以“水中花园”和“化学振荡”等实验事实,论述了化学反应中的自然分形和自组织过程等非线性现象.     

菲茨杰拉德作品中的流亡主题研究

流亡文学不仅是一种文学题材,也同样是一种文学类型。在特定的历史背景下反映特定的时代精神和作家的写作心态。尤其是在20世纪上半叶,经历两次世界大战和社会变革的美国,知识分子流亡在其文学史上占有极大的比重。作为迷惘的一代的流亡作家菲茨杰拉德,必然与这个时代的流亡文学浪潮有着密不可分的联系,他笔下所塑造的主人公形象无论是精神上的自我放逐还是抒发对未来的迷惘状态,无不具有20世纪流亡主题的共性。作家菲茨杰拉德的《人间天堂》《漂亮冤家》《夜色温柔》三部长篇小说描述了作为一个流亡作家在其创作道路上的得与失、寻找与回归,由青年走向成熟的过程。     

五四小说语言：从工具性到本体性

从强调白话的实用意义到关注白话的美学品格,从工具层面的思想传输,到本体层面的价值呈现,五四小说语言的变革不再是被动选择,正逐步向语言的本质靠近,从而直接亲近了时代,亲近了大众,亲近了生活的原生态感受.五四小说开创了从工具性到本体性的新的语言之道,但也存在误区.这一历史进程还有很大的研究空间,深入考察不仅是论题的需要,对于今天再造文学语言的诗性辉煌也不无裨益.     

空间正义与城市革命 ——大卫·哈维城市空间正义思想研究

由于新全球化的全面扩张和都市化运动的快速推进,社会再生产的主要方式已由传统的物的生产转换为空间本身的生产,由此空间正义/不正义成为所有社会问题中的重点和热点。作为断裂化、等级化的城市空间凸显着空间非正义问题,表现在生产领域中城市空间成为受资本力量支配的新的剥削模式,分配和交换领域中城市空间资源配置的不均衡和城市贫富悬殊的加剧,消费领域中城市空间的等级化与堡垒化。在大卫·哈维看来,要实现城市空间正义,必须在城市空间开展反资本主义的斗争,重塑公民意识,争取空间生产权。     

Tolerance of Uncertainty: Links to Happenstance,Career Decision Self‐Efficacy,and Career Satisfaction

This study investigated the extent to which tolerance of uncertainty affects the relationship between happenstance skills and career satisfaction via career decision self‐efficacy. Moderated mediation analysis was conducted on data collected from 321 graduates (175 men, 146 women) of Korean universities making the school‐to‐work transition. Results showed that career decision self‐efficacy fully mediated the relationship between happenstance skills and career satisfaction. Furthermore, the moderation effect of tolerance of uncertainty had a significant impact on the relationship between happenstance skills and career decision self‐efficacy. Tolerance of uncertainty should be considered an important variable in happenstance career theory and intervention. Unplanned influences should also be considered important factors in the career decision‐making process.     

Trust and health in Eastern Europe: Conceptions of a new society

Little attention has been paid to why trends and levels of mortality and morbidity differ in Eastern Europe and few studies have addressed people's own perceptions of their new political system – perceptions which per se may be important for social development. The aim of the present study was to analyse the extent to which trust and economic circumstances affect self‐rated health in Poland, Estonia and Russia and how much health differences between the countries can be explained by these factors. A better economy and higher trust were related to better individual health, while economic factors seemed most important for inter‐country differences. It is probable that both institutional factors and individual perceptions contribute to people's well‐being, but in terms of social policy, an improved welfare system may be the most effective way forward.     

Attenuating Initial Beliefs: Increasing the Acceptance of Anthropogenic Climate Change Information by Reflecting on Values

Anthropogenic climate change information tends to be interpreted against the backdrop of initial environmental beliefs, which can lead to some people being resistant toward the information. In this article (N = 88), we examined whether self‐affirmation via reflection on personally important values could attenuate the impact of initial beliefs on the acceptance of anthropogenic climate change evidence. Our findings showed that initial beliefs about the human impact on ecological stability influenced the acceptance of information only among nonaffirmed participants. Self‐affirmed participants who were initially resistant toward the information showed stronger beliefs in the existence of climate change risks and greater acknowledgment that individual efficacy has a role to play in reducing climate change risks than did their nonaffirmed counterparts.     

Agreement and discrepancy between children,parents, and social workers on school‐based effort avoidance in child welfare services

A multiperspective approach is beneficial for obtaining reliable and multifaceted pictures of child behaviour problems. The goal of the present study is to examine interrater agreement on school‐based effort avoidance between children receiving child welfare services, parents, and social workers. Given previous findings, interrater agreement is expected to be low. Self‐reported data on school‐based effort avoidance were gathered for children and adolescents in child welfare services. Additionally, social workers (using the Teacher‐Report Checklist for social and learning behaviour) and parents (using the parallel version of the self‐rating questionnaire on school‐based effort avoidance) were asked to complete an external assessment tool to compare children's perspectives with the ratings of significant adults. The results confirmed significant discrepancies between parents' and children's ratings on effort avoidance tendencies. Furthermore, there were only small to moderate correlations between children's self‐ratings and the adults' assessments; however, the consensus between adults was higher than the interrater agreement between children and social workers. Discrepancies in ratings from multiple informants underline the importance of integrating multiple perspectives, especially children's perspectives, in the diagnostic process in order to plan and adapt appropriate care and treatment.     

世界科技创新趋势与启示

现阶段"现代化进程强大的客观需求"和"知识技术体系的内在矛盾"正孕育着新一轮科技革命,世界正处在第六次科技革命的前夜。200多年的工业化进程催生出一系列问题。经济发展的客观需求迫切需要开发新的资源能源,创新发展模式和发展途径,创建新的生产方式和生活方式。"基础科学领域""能源和资源域""信息网络领域""先进材料和制造领域""农业领域""人口健康领域"这六个方面孕育着重大的创新突破。科学问题的重大突破和技术的变革将深刻影响人类的生产和生活方式,影响社会发展的进程,影响国家的国际竞争地位。把握新一轮科技革命的战略机遇,将大幅提升我国自主创新与规模产业化的能力。