论篇章基础上的语义映射现象

本文根据图式理论及认知语言学的有关论述,提出语义映射的概念,探讨篇章内词语聚集同现的规律性和多样性,认为那些具有实在意义、语义上相互联系与映射的词语在篇章连贯和句间系连方面发挥着不可替代的作用,为各种篇章衔接手段发挥作用奠定了必要的认知、语义基础。     

集值映射下半连续的三个充要条件

用具体例子揭示了集值映射上半连续和下半连续本质的不同性，给出了集值映射下半连续的三个充要条件和相应的证明，使得集值映射的连续性理论在稳定性的应用中更加灵活方便，在某些情况下也可以作为集值映射下半连续的判定准则。     

A Student-centred Approach: Assessing the Changes in Prospective Science Teachers’ Conceptual Understanding by Concept Mapping in a General Chemistry Laboratory

Although researchers in higher education propose alternatives to traditional approaches to assessment, traditional methods are commonly used in college or university science courses. The purpose of this study was to explore the feasibility and validity of Prospective Science Teachers’ (PSTs) concept maps as authentic assessment tools in a student-centred approach to describe the changes in the conceptual understanding of the PSTs in general chemistry laboratory investigations. After the PSTs (n = 47) decided on important issues, such as who would assess their concept maps and what scoring strategy and criteria would be used, they practiced assessing their own and peers’ concept maps during the first five laboratory investigations. They subsequently constructed and assessed pre- and post-laboratory concept maps in a student-centred approach consisting of self, peer, and instructor assessments for the five remaining laboratory investigations. The results of the study showed using pre- and post-laboratory concept maps as authentic assessment tools in a student-centred approach was valid and reliable for describing the conceptual understanding of the PSTs in a university general chemistry laboratory course. The results of individual interviews indicated most PSTs had positive views of their assessment practices in the laboratory course. This study also provides pedagogical implications for the training of science teachers.     

局部k连通（k道路连通）空间

给出局部连通性与局部道路连通性的定义及等价刻画,研究它们的基本性质,证明它们是拓扑不变性、开遗传性、可商性;最后证明它们是有限可积但不是任意可积,并给出局部连通性可数可积的充要条件．     

测绘工程专业基础类课程的定位与内容整合

测绘工程专业是为国家培养测绘科学与技术人才的一个非常实用的专业。该专业的基础类课程包括“普通测量学”、“控制测量学”、“工程测量学”和“矿山测量学”四门。对这四门基础类课程如何既体现系统性又避免内容重复和遗漏进行研究,明确它们各自在该专业的定位及相应的教学内容,为该专业培养计划的制定提供参考。     

一类高维非线性椭圆型方程正整解的存在性

以Shauder-Tychonoff不动点定理为工具,建立一类高维非线性椭圆型方程△u=f（x,△↓u）u^y（x∈R^n,n≥3,0〈y〈1）正的整体解的存在性定理,并给出了解的有关性质．     

Meta—Lindeloef空间的性质

对meta—Lindeloef空间的性质进行了探讨．给出了X是meta—Lindeloef空间的一个等价条件：X的每一开覆盖哑都有点可数的加细覆盖。E使对每一个x∈X,x∈Int（st（z,v））;证明了meta—Lindeloef空间被可数对一开映射保持;在可分空间中meta—Lindeloef空间与Lindeloef空间等价．     

广义度量空间中几种映射的关系

主要讨论了序列覆盖的伪开映射与几乎开映射之间的关系,也讨论了在第一可数空间中与序列覆盖映射等价的几个条件,以及由定理得出的几个推论．     

多值Φ-强伪压缩映像不动点的集合序列的Ishikawa迭代逼近

在一致光滑的实Banach空间中,研究多值Φ强伪压缩映像集合序列生成的Ishikawa迭代序列逼近问题,给出了迭代集合序列逼近多值Φ强伪压缩映像不动点集合的强收敛定理,是Ishikawa迭代序列逼近多值Φ强伪压缩映像不动点问题的推广。     

凸模糊映射次微分的性质

引入模糊数空间中凸模糊映射和模糊数导概念,定义了凸模糊映射循环单调映射的概念,找到并证明了多个凸模糊映射次微分的性质。