OSGi及其QoS获益驱动动态软件体系结构研究

随着软件领域中移动计算、分布计算和Web Service等技术的迅速发展,软件计算环境变得越来越开放、复杂、多元。如何应对不断变化的计算环境,构建一个自适应的动态软件架构,受到了越来越多的关注。文章首先介绍一个成功的软件系统结构框架实例——Open Service Gateway Initiative(OSGi)。然后,以请求质量QoS为核心,对面向服务的OSGi框架进行扩展,提出了一个动态自适应软件架构解决方案,它以用户QoS属性为目标驱动,通过动态调整软件自身结构,以进一步提高用户期望的服务质量。实验结果证明了该调度框架的有效性。     

什么影响了居民的社会信任水平?——来自广东省的经验证据

采用2004年广东省城市居民调查数据,本文发现,个人因素、社区因素、社会因素都显著影响了居民自身的社会信任水平。年龄越大、单身、有除工作外的其它收入来源、有宗教信仰、担任管理人员、职业变动越少、越乐观、对生活或工作的满意度越高的居民的社会信任水平越高。其次,日常所讲语言不是其所在城市最通行语言、在出现经济困难时得到过街坊邻居、居委会或街道办的帮助、在本市居住的时间越长、在18岁之前就居住在本市、出生地在本省的居民的社会信任水平越高。第三,对政府、媒体、消费者协会的评价越高以及对工会组织评价越低的居民的社会信任水平越高。此外,居民的各种信任分布呈现出"差序格局"的特征。我们的研究为建设诚信社会提供了一个系统的信任发展视角:社会信任水平的提高,不仅需要个体自身的努力,更需要稳定和谐的社区建设、政府治理的改善、媒体作用的发挥以及消费者协会等中介组织的成长。     

Cognition,Social Impulse,and the Principle of Adaptation: Insights into the Peirce-Veblen Connection

This article seeks to offer insights into the connections between Charles S. Peirce and Thorstein B. Veblen regarding their understanding of the logic of scientific thought and cognition. In this sense, this work explores how both Veblen and Peirce dismissed the Cartesian notion of unmediated cognition and how they sought to depict cognition as a process. Furthermore, this article presents Peirce’s concept of “social impulse” and Veblen’s “principle of adaptation” as complementary perspectives on science and cognition that have strong evolutionary content.     

对我国现时夫妻财产制度的探讨

夫妻财产制度，是有关夫妻财产的使用、归属、管理、收益，以及夫妻债务的清偿，夫妻家庭生活等费用的负担，婚姻终止时夫妻财产的清算和分割等的法律制度。夫妻财产制度是夫妻婚姻家庭生活得以正常运转的物质保证，因而它的完善关系到夫妻财产关系平等与否，关系到与夫妻发生交易的第三人的利益安全问题，关系到社会经济的发展问题。     

快慢速自适应融合的安全中继选择

针对无线通信中的物理层信息安全问题,在无线安全协作网络中提出了一种基于快慢速链路自适应融合的安全中继选择方法。该方法根据移动速度选择链路自适应类型,根据干扰节点对安全容量的“正”或“负”效应使用或不使用干扰节点,基于安全容量最大化准则进行中继选择。在此基础上,对所提安全中继选择方法进行了性能分析,推导了中断概率表达式。中断概率的仿真曲线和理论曲线很吻合,验证了理论分析的正确性。同时,仿真结果显示,相对于采用单一快速链路自适应,基于所提中继选择方法的安全协作通信系统具有更低的误码率和更大的安全容量,在“正效应”条件下干扰节点有助于提升系统安全容量。     

主动选择还是被动适应——农户秸秆还田驱动力探究

[目的]秸秆还田好处良多,但秸秆焚烧却屡禁不止。文章主要研究农户秸秆还田行为的长效性问题,考察农户的秸秆还田行为是主动适应还是被动选择。[方法]该文利用山东、湖北调研数据,采用二元Logistic模型实证分析了农户秸秆还田的影响因素以及这一行为的长效性。[结果](1)目前农户的秸秆还田行为还处于被动适应状态,农户对政府高压更为敏感;(2)提高农户对秸秆还田好处的认知将极大促进农户采纳秸秆还田技术;(3)政府高压和秸秆还田认知能显著提高男性农户的秸秆还田技术采纳行为;(4)提高女性农户对秸秆还田优点的认知能显著提高其对秸秆还田技术的采纳行为。[结论]政府在推动秸秆资源化利用的过程中,应"疏堵结合",通过强化技术支撑,实现秸秆还田技术配套措施的纵向一体化和秸秆还田方式的横向整合。通过加大宣传力度和注重群体导向等方式,实现农户认知水平和政策精度的提高,更好实现秸秆还田。     

Tourism and community resilience in the Anthropocene: accentuating temporal overtourism

Abstract

Global tourism growth is unprecedented. Consequently, this has elevated the sector as a key plank for economic development, and its utility is deeply embedded in political, economic and social-ecological discourse. Where the expansion of the sector leverages natural and cultural landscapes, this applies pressure to social and ecological underpinnings that if not reconciled, can become problematic. The way this plays out in Australia’s Shipwreck Coast and the wider Great Ocean Road region, especially the implications for community resilience, is the focus. Emphasis is placed on the vulnerability of peripheral coastal areas to development that withdraws from destination endowments, yet fails to provide commensurate economic yield as a suitable trade-off. This is obvious where tourism intensification has led to concerns about the breach of normative carrying capacities. Temporal overtourism driven by seasonal overcrowding is countenanced as emblematic of tourism in the Anthropocene where focus tends to be largely growth-oriented, with much less attention given to bolstering social-ecological resilience, especially community resilience. At stake is the resilience of regional areas and their communities, who in the absence of garnering commensurate economic returns from tourism expansion find themselves in social and ecological deficit.