辽宁省2000年夏季干旱分析

本文针对辽宁省2000年发生的干旱,从大气环流、气候、降水、径流、水资源量等方面,较系统地阐述了各因素的发展规律、特点及物理成因。采用降水指标、径流指标、受旱率进行干旱程度分析。评价出辽宁省2000年干旱为特大干旱。     

辽宁省2002年水情趋势预测

针对辽宁省旱涝发生的基本规律,系统介绍多年来开展水文中长期预报所应用的理论和方法,总结水情趋势预测工作的经验,对2002年水情趋势进行分析预测。     

中国的主要水问题及水文学的机遇

从水资源开发利用与保护、水旱灾害防治等方面论述中国当前存在的主要水问题：水危机和水浪费同时存在、水污染日趋严重、防洪减灾任重道远、生态环境破坏严重、全球气候变暖产生不利影响；进而论述水文学研究面临的新课题：水文现象的不确定性、人类活动对水文的影响、水位频率计算、水资源开发利用的最佳效应、水资源供需分析、农业节水灌溉机理及水旱灾害的防治，并指出必须加强对这些新课题的研究     

Depressive symptoms erode self-esteem in severe mental illness: A three-wave, cross-lagged study.

Vulnerability, scar, and reciprocal-relations models of depressive symptoms and self-esteem were compared among people with severe mental illness (SMI; N=260) participating in a partnership-based intervention study. Assessments were conducted at baseline, midway through the intervention (after 4 months), and at termination (after 9 months). Cross-lagged, structural equation modeling analyses revealed that participants' baseline depressive symptoms predicted a decrease in self-esteem in the first 4 months but not in the subsequent 5 months of participation. Exploratory regression analyses indicated that improved social functioning buffered this deleterious effect of depressive symptoms. These findings, which are consistent with the scar model, highlight the fragile nature of the self and the importance of social functioning in recovery from SMI. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Electronic Emissions Security: Danger in the Air

Most organizations have measures to protect their network infrastructure from intruders. With the growth AND AVAILABILITY of wireless, some intruders now are aiming their attacks there. The potential for damage from these types of attacks is significant due to their nature. However, there is another type of wireless attack on organizational resources that also poses a significant vulnerability. That is electromagnetic radiation, also called radio frequency emissions (RFE), from unprotected systems and networks.     

Dangerous ideas: Five beliefs that propel groups toward conflict.

The toll in death, suffering, and displacement caused by conflicts engaging groups defined by ethnicity, nationality, religion, or other social identities has reached staggering proportions over the past decade. With expertise in research and intervention, psychologists have critical contributions to make to more fully understanding and more effectively confronting this distressing global phenomenon. The authors focus on the parallels between the core beliefs of individuals and the collective worldviews of groups that may operate to trigger or constrain violent struggles. On the basis of a review of relevant literatures, 5 belief domains--superiority, injustice, vulnerability, distrust, and helplessness--are identified as particularly important for further study. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

旱情预报技术进展与展望

受全球气候变化影响和人类活动的加剧,干旱灾害发生频次增加且强度增大,严重威胁着我国的粮食安全和水安全。准确及时的旱情预报,对于制定科学有效的干旱应对策略、减少灾害造成的损失具有重大意义。从基于数理统计模型的预报技术和基于物理机制模型的预报技术两方面入手,梳理回顾了国内外研究进展,揭示了当前预报技术所存在的问题,并提出针对性的解决方案。未来研究应注重提高干旱监测数据的质量、突破核心关键技术、构建全国旱情预报业务化系统,为抗旱减灾事业提供强有力的科技支撑。     

基于SPI的辽宁省庄河市近35年干旱演变特性研究

庄河市是辽南地区的重要水源地,分析其干旱演变特性有利于该地区水资源的合理开发与利用,对于防旱减灾、合理布局产业结构具有重要的现实意义。本文根据庄河市1984年1月1日至2018年12月31日的逐日降水数据计算了1个月、3个月、6个月、12个月共4个不同时间尺度下的标准化降水指数(SPI),并基于SPI对该地区近35年的年际与季节干旱演变特征进行了分析。结果表明:在年际变化方面,庄河市的SPI在2000年以前波动幅度较小,说明该地区的降水在时间上分布较为均匀;但自2000年以来,SPI序列出现较大的波峰与波谷,说明降雨的分布不均匀性有所增强;SPI的时间序列趋势线斜率为负值,说明该地区整体上呈现偏旱趋势,因此其水资源压力不断增大。在季节演变特征方面,夏季干旱和秋季干旱呈现增强趋势;秋旱的发生频率最高,而夏旱的出现频率最低。本研究结果可为庄河地区的抗旱减灾与水资源规划提供科学依据。     

电子签章安全漏洞分析研究

文章介绍了电子签章产品的一般结构,提出了电子签章产品的安全漏洞为无法保护文档框架和格式、无法保护文档所有数据和产品自身安全漏洞,分析了漏洞存在原因,并从产品的标准制定、功能完善、自身安全性加固三方面提出了改进建议。     

Android Permission机制的实现与安全分析

Permission机制作为Android安全的重要组成部分,受到了越来越多的关注,已有的研究主要集中在对应用程序申请的Permission进行静态分析上。文章从分析Permission机制的实现过程入手,分析了Permission机制自身的安全问题,发现了一个Permission机制漏洞。应用程序利用该漏洞可以绕过权限管理,主动提升应用程序的访问权限,为后续攻击提供支持。同时文章也对Permission机制其它方面的安全特性进行了分析。