世界优秀女子400m跑运动员速度分配特征的多元分析

运用相关分析、回归分析、因子分析等研究方法,对世界优秀女子400m跑运动员的各分段50m成绩与总成绩进行分析研究。揭示分段50m与400m成绩之间的相关关系和当今世界优秀女子400m跑运动员速度分配的基本特征,为提高我国女子400m运动成绩提供科学借鉴。     

基于AIS船站的舟山港海事信息监测系统

针对舟山港务管理局对港内船舶识别与动态跟踪的需求,在分析研究船舶自动识别系统(Automatic Identification System, AIS)的通信技术、总体结构的可行性、覆盖范围和所能容纳的最大船舶数量的基础上,设计并组建以船舶自动识别系统船站作为岸基站的海事信息监测系统.实际试运行表明,该系统的功能和性能满足实用要求,具有良好经济性,并可推广至类似的应用场合.     

中级汉语阶段词语教学刍议

词语教学是对外汉语教学的一个重要环节,关系着对汉语的准确理解和使用。在中级阶段的词语教学中,教师应该通过有效的教学方法,恰当的释义方式帮助学生深入地掌握词义,扩大词汇量;同时还应使学生认识到不同语言中有对应关系的词语几乎都存在着一定程度的不等值性,要力戒母语的干扰。     

A Cost–Benefit Analysis of Automatic Item Generation

Automatic item generation (AIG)—a means of leveraging technology to create large quantities of items—requires a minimum number of items to offset the sizable upfront investment (i.e., model development and technology deployment) in order to achieve cost savings. In this cost–benefit analysis, we estimated the cost of each step of AIG and manual item writing and applied cost—benefit formulas to calculate the number of items that would have to be produced before the upfront costs of AIG outweigh manual item writing costs in the context of K‐12 mathematics items. Results indicated that AIG is more cost‐effective than manual item writing when developing, at a minimum, 173 to 247 items within one fine‐grained content area (e.g., fourth‐ through seventh‐grade area of figures). The article concludes with a discussion of implications for test developers and the nonmonetary tradeoffs involved in AIG.     

Exploring coherent topics by topic modeling with term weighting

Topic models often produce unexplainable topics that are filled with noisy words. The reason is that words in topic modeling have equal weights. High frequency words dominate the top topic word lists, but most of them are meaningless words, e.g., domain-specific stopwords. To address this issue, in this paper we aim to investigate how to weight words, and then develop a straightforward but effective term weighting scheme, namely entropy weighting (EW). The proposed EW scheme is based on conditional entropy measured by word co-occurrences. Compared with existing term weighting schemes, the highlight of EW is that it can automatically reward informative words. For more robust word weight, we further suggest a combination form of EW (CEW) with two existing weighting schemes. Basically, our CEW assigns meaningless words lower weights and informative words higher weights, leading to more coherent topics during topic modeling inference. We apply CEW to Dirichlet multinomial mixture and latent Dirichlet allocation, and evaluate it by topic quality, document clustering and classification tasks on 8 real world data sets. Experimental results show that weighting words can effectively improve the topic modeling performance over both short texts and normal long texts. More importantly, the proposed CEW significantly outperforms the existing term weighting schemes, since it further considers which words are informative.     

一种基于复杂网络模型的作者身份识别方法

[目的/意义]作者身份识别是语言文体学的重要研究方向,利用文本特征的身份识别也是文本挖掘的重要任务。在开放和虚拟网络环境下海量信息的作者身份或发布者的识别难题和传统作者身份识别方法在处理效率和成本等方面存在的问题有待解决。[方法/过程]将复杂网络理论引入该研究领域,在利用传统文体学特征识别作者身份方法的基础上结合文本词共现网络模型及其指标特征改进相关算法,使用文本文体学特征和文本网络模型度量指标构建作者风格特征集合,通过计算文本间风格相似度进行作者识别。[结果/结论]基于复杂网络模型的作者身份识别方法可以有效的利用作者风格特征,提高识别的精度,与其他算法的对比试验表明其识别结果的准确性更高。     

基于区域的图像检索算法

本论文主要针对现在日益增长的多媒体信息检索需求,以及目前国内外现有的基于区域的图像检索算法的局限性,深入地探讨了基于区域的图像检索的通用技术问题,提出了解决方案,着重于新的图像特征描述方法,相似度检测、特征提取与快速检索算法等方面的研究,构建了一个基于区域的图像检索通用模型,通过大量实验,验证了方案的合理性。     

浅析英语新闻中的构词法对语言教与学的启发

本文通过分析构词法的理论及分类,结合英语新闻中构词法的灵活运用来阐述词性特征与构建特点,从而获得构词法的实用意义,可以激发学习者阅读能力,提高课堂教学效率,以及更好地实现二语习得。     

浅析汉语语序对语义表达作用的影响——以“在墙上挂地图”和“地图挂在墙上”为例

汉语是典型的孤立语,和印欧语系有明显的区别,汉语缺乏严格意义上的形态变化,其表意手段主要通过语序和虚词。我们以对外汉语教学中"动词+处所词"这一结构为例,阐述汉语语序对语义表达作用的影响,进而强调语义分析法在对外汉语语序教学中的重要作用。     

我国遗产分割中归扣习俗的调查研究--以巴东县绿葱坡镇为例

归扣是指在共同继承中,继承人在被继承人生前取得特种赠与,遗产分割时从应继份中予以扣除的一种方式。现行《继承法》对此还属于一片空白,但在民间大量存在归扣的做法。归扣符合我国的国情,符合法律的公平理念和衡平继承人之继承利益的价值追求。我国《继承法》有必要引进这一制度。