有意味的形式——评《红枫树下的呢喃·魅力红河》的景观特征及文化内涵

向延斌的散文集《红枫树下的呢喃·魅力红河》主要呈现的是红水河流域的乡村景观。有地理景观的历史记忆;有民俗风情的多情诉说;有山野拾掇的自然情怀;乡村景观是当地少数民族先民及其后代生活的根基,从人的自我认同而言,体现的是一种成长的生命形式,它是一种符号,它表征着各个少数民族激情的生活方式,它是一种有意味的形式。     

赣南师范学院(黄金校区)访花昆虫物种多样性研究

为了解赣南师范学院黄金校区访花昆虫种类,笔者于2010年10月-2011年10月开花期间在校园内采用随机取样和系统取样法,以网捕和手捕方式采集访花昆虫并进行鉴定.结果表明:师院校园共有访花昆虫135种,分属于7目,39科.从目级分类阶元物种数量水平上分析,鳞翅目>膜翅目>鞘翅目>双翅目>半翅目>蜻蜓目>同翅目,其中优势访花昆虫种类为意大利蜜蜂(Apis mellifera)、黑带食蚜蝇(Episyrphus balteatus)和异色瓢虫(Harmonia axyidis).     

基于不平衡数据集的决策树算法

为了使决策树健壮,我们从描述信息增益开始,关于这个规则的置信度,使用C4.5作为度量。这可以使我们快速的解释为什么信息增益,象置信度,偏重大多数类的规则的结果。为了克服这种偏见,我们介绍一种新度量,类置信度比例（CCP）,它是CCPDT（类置信度比例决策树）形成的基础。这两种变化在一起产生一个分类器,它不仅比传统的决策树,而且比著名的平衡取样技术学习树能更好的完成统计。     

嵌入式数据库SQLite中B树的研究

本文重点描述了开源嵌入式数据库SQLite对数据的组织方法和其中B树页的结构,并对利用SQLite建立的数据库文件进行了的设计。在此基础之上,进一步对SQLite中实现此部分的程序代码进行了更深入的分析。最后利用SQLite中提供的接口函数完成了对红-黑树的操作程序,实现了在数据库中对B树的应用,完成了对该数据库的优化。     

树先生：超现实主义的想象性胜利

论述了电影（（hello!树先生》前后两部分截然不同的艺术风格,指出其前半部分属于贾樟柯式的纪0’T实风格,而后半部分则进入了超现实主义式的虚幻风格。（hello!树先生》由此展现了一种对于现实的想象性胜利。     

Using Decision Tree Analysis to Understand Foundation Science Student Performance. Insight Gained at One South African University

The Foundation Programme of the Centre for Science Access at the University of KwaZulu-Natal, South Africa provides access to tertiary science studies to educationally disadvantaged students who do not meet formal faculty entrance requirements. The low number of students proceeding from the programme into mainstream is of concern, particularly given the national imperative to increase participation and levels of performance in tertiary-level science. An attempt was made to understand foundation student performance in a campus of this university, with the view to identifying challenges and opportunities for remediation in the curriculum and processes of selection into the programme. A classification and regression tree analysis was used to identify which variables best described student performance. The explanatory variables included biographical and school-history data, performance in selection tests, and socio-economic data pertaining to their year in the programme. The results illustrate the prognostic reliability of the model used to select students, raise concerns about the inefficiency of school performance indicators as a measure of students' academic potential in the Foundation Programme, and highlight the importance of accommodation arrangements and financial support for student success in their access year.     

Factors Influencing Schoolchildren's Responses to a Questionnaire in Wildlife Conservation Education

Questionnaires are important tools for assessing attitudes regarding conservation issues. However, they are not easily comparable and their reliability has been insufficiently assessed. We examined factors influencing responses to open- and closed-ended questions about animal conservation to more than 600 schoolchildren (9 years old on average). We analysed the level of understanding, controllable (e.g. sample size) and less controllable factors (e.g. affectivity). Most children responded appropriately to the questions, but subtle changes in the phrasing influenced the answers. Affectivity towards endearing species and spontaneity also influenced the responses whereas small sample sizes (～50 children) provided relatively stable patterns. Overall, we suggest that standardization of questionnaires administered over large spatial and time scales is needed to accurately assess children's attitudes towards conservation issues.     

一类具有相互干扰的功能反应捕食系统的捕获分析

研究一类具有相互干扰功能反应的捕食-食饵系统.对正平衡点的局部渐近稳定性和全局稳定进行了详细说明,证明了系统在正平衡点处是全局稳定的,并利用Pontrjagin最大值原理及最优控制理论,得到该系统的最优捕获策略.所得结果改进和推广了相关文献的主要结果.     

双桥水库供水工程区草本植物群落物种多样性

采用样方法对水城县保华乡双桥水库工程区草本植物群落特征进行了调查研究。结果表明：水库工程区草本植物群落样方中,种密度为6.167×10^4种/hm^2,个体密度为8.067×10^6株/hm^2,主要以禾本科、菊科、唇形科、蝶形花科等科的植物占优势;草本植物优势种群在不同程度上均表现为集群分布;6个样地中,Simpson指数和Shannon指数的平均值分别为0.680和2.170,表明其物种多样性较丰富。