Multi-neighborhood based iterated tabu search for routing and wavelength assignment problem

The routing and wavelength assignment problem (RWA) has shown to be NP-hard if the wavelength continuity constraint and the objective of minimizing the number of wavelengths are considered. This paper introduces a multi-neighborhood based iterated tabu search algorithm (MN-ITS), which consists of three neighborhoods with a unified incremental evaluation method, to solve the min-RWA problem. The proposed MN-ITS algorithm is tested on a set of widely studied real world instances as well as a set of challenging random ones in the literature. Comparison with other reference algorithms shows that the MN-ITS algorithm is able to improve five best upper bounds obtained by other competitive reference algorithms in the literature. This paper also presents an analysis to show the significance of the unified incremental evaluation technique and the combination of multiple neighborhoods.     

以行为分析学为指导科学构建学生综合素质考评体系

目前,大部分高职院校对学生的考核模式不适应社会对高职院校学生的要求。应当建立科学的考评体系,对学生的行为进行科学的分析,为学生综合素质考评提供依据,促使学生能扬长避短,不断进步。     

金庸小说里的辽东元素（下）——从阿骨打到胡一刀,都有那股劲

金庸的武侠世界中,常有帝王将相出场.他的小说多以王朝兴替乾坤倒转之际为背景,也是金大侠的好发政论使然.他曾自我剖白称,《笑傲江湖》和《鹿鼎记》写的就是政治.《鸳鸯刀》看似短篇戏谑之作,其实也有金氏的政治图解掩映其中.     

基于改进贝叶斯网络的省级政府债务风险预警模型

利用格兰杰非因果关系检验确定贝叶斯网络节点,反映经济变量之间的影响方式。采用误判率最小原则,确定预警指标临界值。利用贝叶斯网络学习,确定贝叶斯网络节点的后验概率。利用贝叶斯网络推理,测算地方政府债务风险,计算预警指标变化对省级政府债务违约概率的影响。研究结果表明:财政收入/财政支出与GDP增速/债务增速是预警省级政府债务风险的最重要指标,保持债务依存度、GDP增速/债务增速和民间投资增速/政府债务增速在适度区间内,能够有效降低省级政府债务风险。     

Assessing Participation and Effectiveness of the Peer-Led Approach in Youth Sexual Health Education: Systematic Review and Meta-Analysis in More Developed Countries

Sexual health education for young people is crucial not only for development of norms but also for protection against vulnerabilities during this stage in life. Although several systematic reviews have examined the effectiveness of peer-led sex education, none have focused on the extent of peer participation. The purpose of this review was to evaluate peer-led sexual health education interventions in more developed countries (MDCs). Electronic and manual searches across five social science, education, and medical databases were conducted. Fifteen articles were selected in total. Most (10 of 15) studies gave low or no responsibility to peers. The majority of articles found improvements in sexual health knowledge (13 of 14) and attitudes (11 of 15) at postintervention stages. Two studies showed improved self-efficacy, and three showed behavioral changes. A preliminary synthesis of effectiveness and level of participation was done. Meta-analysis revealed a large effect on knowledge change (Hedges’ g = 0.84, 95% confidence interval [CI]: 0.43 to 1.25) and a medium effect on attitude change (Hedges’ g = 0.49, 95% CI: 0.19 to 0.80). Peer-led interventions could be a powerful tool. This review shows that this approach is effective in changing knowledge and attitudes but not behaviors. Further research and action are needed to understand optimal implementation.     

幼儿快乐阅读习惯的培养路径

阅读是一种良好的习惯,它对人的一生发展起着十分重要的作用。近年来，学前阅读的重要性受到了社会的高度关注，大家纷纷开展多种形式的幼儿阅读活动,然而,如何在学前阶段培养幼儿良好的阅读意识、阅读方法，为他们进入学校后开展书面语言学习及终身学习打下良好的基础，是目前幼儿教育工作中的一个重要问题之一。因此,我们积极地开展了以培养幼儿快乐的阅读习惯为主要内容的探索,旨在通过为幼儿创设适宜的阅读环境,激发幼儿快乐开展阅读活动。     

诗歌押韵与起承转合

起承转合,关于诗文的意蕴结构或曰章法的这一术语,也可以用来概括诗歌的押韵规律.在诗歌的各种韵式中,起承转合这一韵式有着独特的优势,至今葆有顽强的生命力.     

东南亚华裔学生中文姓名用字研究

姓名是语言学中一个值得关注的课题,它是一种社会现象,也是一种语言现象,有丰富的内涵。文章通过语料样本对东南亚华裔学生的中文姓名用字进行统计研究,分析用字特点,对华裔学生中文取名方法和对待相关问题应有态度进行探讨。     

“意义”的缺在与追寻——从胡塞尔到德里达与泰勒

在《几何学的起源》中,胡塞尔以几何学为示范,采用生成现象学的方法试图寻找具有理想客观性的意义.对此,德里达指出,胡塞尔的工作仍停留在“构成性”的分析之内,并在《胡塞尔〈几何学的起源〉导引》中,从语言的差异性人手将胡塞尔关于意义的几何学式梦想无限地延异了.胡塞尔的研究主要以历史学的考察来展开并完成,这当中有着鲜明的目的论色彩.而泰勒在《差错:一种后现代非/神学》中通过对《圣经》文本进行类型学分析,深入揭示了逻各斯中心在历史构成中的作用,这一祛魅式的研究更加印证了德里达对胡塞尔构成性分析的评论.经过德里达与泰勒的研究,胡塞尔渴望的理想客观性意义的永恒在场正是以缺在的方式表明自身的存在,这种“缺在的意义”与“为获得意义而建构历史”之间的内在张力则构成了对意义不断寻找的激情,为人们在历史中对那个缺在的意义进行更加丰富而多元的阐释敞开空间.     

气藏水平井连续携液理论与实验

在气藏水平井中随着生产管柱倾斜角度的变化，井筒内液体的重力作用会发生改变，从而引起气液两相流型的变化。以产气为主的气井井筒内液体主要以液膜、液滴的形式出现，由此出现了液滴模型与液膜模型两种解释积液的理论。从这两种携液理论出发，考虑生产管柱倾斜角度的影响，对倾斜管内液滴、液膜进行受力分析，推导出了随管柱倾斜角度变化的连续携液临界流速的计算式，使之适用于水平井连续携液临界流量的计算。设计制作了水平气井连续携液实验装置并进行了实验研究，观测气藏水平井中气水两相运动与流型变化情况并测试其临界携液气量，结果表明，气藏水平井中水平井段的液体以液膜携带为主，但直井段中越接近井口，越以液滴携带为主，液滴模型也能适用于计算气藏水平井的连续携液临界流速。