极地大气科学考察与全球变化研究

南极和北极是地球上的气候敏感地区,也是多个国际计划研究全球气候变化的关键地区。极地包含了大气、海洋、陆地、冰雪和生物等多圈层相互作用的全部过程,在全球气候的形成和变化中有重要的作用。极地大气科学考察与研究是极地科学研究的重要组成部分。到2008年初,我国自主组织了24次南极考察,2次北冰洋考察和4次北极站考察;建成了南极长城站、中山站和北极黄河站,并在南极冰盖设置了5个无人自动气象站;开展了有关极地大气科学与全球变化的研究。在南北极地区,进一步加强国际合作,继续监测包括近地面温度在内的大气要素的变化,提高极地气象业务水平;拓展极地气象业务和大气科学考察研究领域,积极获取气候代用资料;进一步量化和认识极地在全球变化中的作用,及其对我国天气气候和国民经济可持续发展的影响;建立完善极地大气科学研究体系,提高极地大气科学研究水平,仍是我国极地大气科学与全球变化研究的重要内容之一。     

一维非均熵流方程组整体经典解

考虑一维非均熵流气体动力学方程组Cauchy问题 ,给出了其经典解整体存在的一个充分必要条件     

生物学中一类带有扩散项模型的全局分歧研究

研究了一类带扩散项的pioneer-climax模型在Neumann边界条件下的共存态问题。首先,给出了平衡态方程解的先验估计。其次,利用分歧理论和度理论,结合极值原理,以d为分歧参数,得到系统非常数正解的存在性,同时得出局部分歧可延拓为全局分歧。再次,详细地描述了非常数正解的全局分歧结构。最后,讨论了连通分支Γ伸向无穷。     

一类具连续时滞的单种群系统的分支问题

本文讨论了积分微分方程非平衡点的稳定性和分支问题,得到了正平衡点全局稳定的充分条件,并给出系统出现Hopf分叉的分支值。     

“Global warming” versus “climate change”: A replication on the association between political self-identification,question wording,and environmental beliefs

Climate change is one of the greatest threats to humanity and requires immediate action. Schuldt, Konrath, and Schwarz (2011) suggested that beliefs in environmental phenomena can be influenced by the terminology used to describe it: changing question wording from global warming to climate change resulted in a 6.3 percentage point increase in belief in environmental phenomena. This association was moderated by political self-identification, with Republicans being 16.2 percentage points more likely to believe in climate change than in global warming, with Democrats showing no difference. The potential for connotative meanings to shift over time and the sociopolitical changes since the original study, potential policy and environmental campaign implications, and an expansion of these findings to other countries, motivated an attempt to replicate this important finding. This pre-registered study repeated the original procedures in the United States of America and two other countries (United Kingdom and Australia; total N = 5,717). Although question wording no longer had a significant effect on beliefs in climate change/global warming, the association of political self-identification with beliefs in environmental phenomena replicated in all three countries, with Conservatives consistently believing less in climate change/global warming than Liberals. The potential impacts of temporal and methodological differences on the discrepancies between this study's and the original's findings are discussed.     

“Global warming” versus “climate change”: A replication on the association between political self-identification,question wording,and environmental beliefs

Climate change is one of the greatest threats to humanity and requires immediate action. Schuldt, Konrath, and Schwarz (2011) suggested that beliefs in environmental phenomena can be influenced by the terminology used to describe it: changing question wording from global warming to climate change resulted in a 6.3 percentage point increase in belief in environmental phenomena. This association was moderated by political self-identification, with Republicans being 16.2 percentage points more likely to believe in climate change than in global warming, with Democrats showing no difference. The potential for connotative meanings to shift over time and the sociopolitical changes since the original study, potential policy and environmental campaign implications, and an expansion of these findings to other countries, motivated an attempt to replicate this important finding. This pre-registered study repeated the original procedures in the United States of America and two other countries (United Kingdom and Australia; total N = 5,717). Although question wording no longer had a significant effect on beliefs in climate change/global warming, the association of political self-identification with beliefs in environmental phenomena replicated in all three countries, with Conservatives consistently believing less in climate change/global warming than Liberals. The potential impacts of temporal and methodological differences on the discrepancies between this study's and the original's findings are discussed.     

含温度背景下宇宙弦的引力场

考虑温度效应,运用改写的能自发破缺产生整体宇宙弦的标量场在有限温度下的拉氏密度,求解了整体宇宙弦核外的引力场方程,对零温理论中的结果作了修正,进而讨论弦核外引力场的性质。     

中国企业全球学习的战略协同与发展--基于核心竞争力的视角

经过分析经济全球化背景下我国企业的比较优势及所面临的新挑战,本文得出:国内企业在当今国际经济环境中处于极为不利的地位,主要就是因为普遍缺少核心竞争力。然后针对核心竞争力的构建与提升,探索全球竞争中中国企业全球学习战略的内外向展开。最后集中研究中国企业全球学习的战略协同与发展,从全球学习网络、全球知识管理、文化与制度创新三个方面提出了一系列的创新性思维和策略参考。     

Web位置服务系统设计与实现

综合应用Ext JS、AJAX、MySQL等技术设计并实现了一个基于GPS/GPRS/Web的位置服务系统。它主要有移动终端、互联网络、数据网关、位置服务网站和电子地图等几部分组成。在系统实现过程中,为避免对特定终端的依赖,采用数据网关兼容多款终端方式接入系统;为减少电子地图对系统的侵入性,采用适配器模式调用电子地图。为解决B/S架构中实时性较差的问题,采用推送技术,将终端的位置信息推送到客户端浏览器。实践表明:它是一个能够兼容多款终端、为用户提供终端监控和导航服务的位置服务系统。     

船用NBDP通信设备的仿真实现与实操评估

在分析了窄带直接印字电报(narrow band direct printing telegraph,NBDP)的组成和功能的基础上,阐述了开发NBDP通信设备所使用的关键技术、系统结构、模块设计等。采用Visual Studio 2010开发平台,构建了NBDP仿真系统整体系统框架,完成了对现在船上主流的NBDP终端显示器、电传编辑和通信业务、特殊效果等的仿真,开发了NBDP仿真系统。系统的实操评估采用分步评估法和层次分析法相结合的方法,根据实操评估要素的权重、要求是否完成、操纵完成的时间及操作步骤三点来设计评估算法,从而计算出船员的评估成绩,实现了系统的自动评估功能。在GMDSS教学与培训中,用户可以通过客户终端实现对设备操作的训练和评估。