论极限、连续与Riemann可积性

在有限区间I上定义的有界函数f(x)为Riemann可积的充要条件是f(x)在I上α.e.连续,因此几乎处处有有限的极限.相反,由极限(单侧极限)几乎处处存在也可断言f(x)在I上a.e.连续,因而是Riemann可积的.     

数控车床加工编程技巧应用三篇

通过对FANUC-0i系统数控车床G94、G72功能指令在编程中技巧性的应用,以及锥体加工编程中参数R(或I)值的计算技巧介绍,意在论述数控知识运用的灵活性。此三项编程技巧方便、实用。     

中国“歌德”之道路——论郭沫若解放后的思想和文艺活动

郭沫若是中国新诗的奠基人，是继鲁迅之后新文学的又一面旗帜。他在诗歌，小说、戏剧历史研究，甲骨文研究等领域，有过多方面的突出贡献，然而当代的郭沫若，经历了曲折而复杂的心路历程，他的“歌德观”也出现了多次反复和变异，本文试图对他与歌德的关系史作较为全面的社会学的考察，以期重新走进他充满矛盾的精神世界，反思一代文学大师所走过的历史道路。     

论水资源持续利用的问题及策略

指出了水资源持续利用面临的挑战和问题，并对未来水资源管理作了明确的阐述，号召人们节约用水保护水资源的持续利用。     

A fast commonly-used algorithm of P-III distribution curve and its application

1. Introduction In drawing up the rainstorm intensity formula of a modern town to obtain the datum relation between the rainfall intensity and the rainfall time-recurrence period from original data of rainstorm intensity at different rainfall time, there are two methods: 1) the method of theoretical frequency, 2) adjusting original data with some theories or an empirical frequency curve. The second method is usually adopted based on a great quantity of project practices done by predecessors. …     

散度型椭圆型方程解的正则性

本文研究散度型椭圆型方程,在关于方程自由项的较弱条件下,得到有界广义解的C~(1,α)正则性.     

《老残游记》的三个女性叙事结构比较

<老残游记>描写的三个女性白妞、玙姑、逸云在叙述结构上有其共性和个性.刘鹗高超的叙事技巧使三个女性含有不同的象征意义,透露出刘鹗进步的女性观和其救国理想.     

第三代移动通信系统和宽带码分多址

第三代移动通信技术在我国正在从研究走向商用，目前主要采用三种3G标准。基于第二代移动通信GSM平台之上的3G技术——WCDMA的技术演进及前景应当给予关注。     

3G系统三种主流技术标准及其比较

本文介绍了3G移动通信系统（3G）的概念、设计目标和主要特征，简要介绍了3G系统中最具势力，也是最有代表性的三种主流技术标准，并对3G系统的三种主流技术标准从技术成熟性、频率利用率、频率适用性、全球漫游能力和建网的经济性等方面进行了比较详细地比较。     

Teaching neuroanatomy using computer‐aided learning: What makes for successful outcomes?

Computer‐aided learning (CAL) is an integral part of many medical courses. The neuroscience course at Oxford University for medical students includes CAL course of neuroanatomy. CAL is particularly suited to this since neuroanatomy requires much detailed three‐dimensional visualization, which can be presented on screen. The CAL course was evaluated using the concept of approach to learning. The aims of university teaching are congruent with the deep approach—seeking meaning and relating new information to previous knowledge—rather than to the surface approach of concentrating on rote learning of detail. Seven cohorts of medical students (N = 869) filled in approach to learning scale and a questionnaire investigating their engagement with the CAL course. The students' scores on CAL‐course‐based neuroanatomy assessment and later university examinations were obtained. Although the students reported less use of the deep approach for the neuroanatomy CAL course than for the rest of their neuroanatomy course (mean = 24.99 vs. 31.49, P < 0.001), deep approach for CAL was positively correlated with neuroanatomy assessment performance (r = 0.12, P < 0.001). Time spent on the CAL course, enjoyment of it, the amount of CAL videos watched and quizzes completed were each significantly positively related to deep approach. The relationship between deep approach and enjoyment was particularly notable (25.5% shared variance). Reported relationships between deep approach and academic performance support the desirability of deep approach in university students. It is proposed that enjoyment of the course and the deep approach could be increased by incorporation of more clinical material which is what the students liked most. Anat Sci Educ 10: 560–569. © 2017 American Association of Anatomists.