项目驱动的程序设计实践课程的“翻转课堂”+SPOC教学研究

程序设计实践课程是高校计算机学科部分相关专业的必修课程之一,该课程对于高校学生的逻辑思维能力和动手实践操作能力要求较高。然而,在高校程序设计实践课程中学生对待课程的"畏难"心理、学校对于程序设计实践的重视度不够、高校教师考核方式的不科学等都是阻碍高校学生编程能力提高的障碍。结合时代发展及我国教育信息化规划,本文提出以项目教学为驱动的程序设计实践课程的"翻转课堂"+SPOC教学模式。根据项目驱动教学特点,基于"翻转课堂"+SPOC的网络在线教学平台,笔者结合具体Java教学实例从课前准备、课中教学和课后评价三个方面对程序设计实践课程展开了教学研究,为高校计算机程序设计实践课程提供一定的参考。     

花楸树、水榆花楸茎次生木质部结构比较研究

花楸树、水榆花楸均为散孔材，射线为异形射线．但花楸树次生木质部的导管分子穿孔板有网状穿孔板和单穿孔板厦一些过渡类型，而水榆花楸次生木质部的导管分子穿孔板为单穿孔板。因此水榆花楸较花楸树进化水平高．     

E40船板钢焊接接头组织性能分析

对13 mm厚E40船板钢进行焊接,测定了焊接接头不同位置的力学性能,并观察了焊接接头不同位置的显微组织,结果表明,在焊缝区域晶粒较为粗大,焊缝厚度中心为铁素体和珠光体,焊缝上表面为粗大的柱状晶,导致此处的韧性较差,硬度较低;在焊缝厚度方向的中心位置向一侧母材偏移4 mm后为热影响区的过热区,此位置的组织中存在大量的魏氏组织,故硬度较高,但不利于韧性的改善;偏移6~8 mm后进入热影响区的正火区,组织为细小的铁素体与珠光体,因此硬度大幅降低;偏移10 mm后由于受到热应变失效脆化影响该处的硬度达到最高值,此处组织为粗化的针状铁素体与准多边形铁素体;由焊缝中心偏移12 mm后进入母材区,其低温韧性基本等于母材。     

Axisymmetrical Nonlinear Bending and Buckling of a Circular Plate Under Large Load

With the terms of the exact series solution taken as trial functions, the method of point collocation was used to calculate the large deflection of a circular plate. The axisymmetrical bending formulae were developed for the calculation of a circular plate subjected to polynomial distributed loads, a concentrated load at the center, uniform radial forces and moments along the edge or their combinations. The support may be elastic. The buckling load was calculated. Under action of uniformly distributed load, central load or their compound load, solutions were compared with those obtained by other methods, Buckling beyond critical thrust was compared with that calculated by the power series method. The method presented in this paper has advantages of wide convergent range, high precision and short computing time. Moreover, the computing time is nearly independent of the complexity of the loads.     

三圆盘非线性扭转自由振动系统3:1型内共振

建立了具有非线性的三圆盘扭振系统的数学模型,应用非线性振动的平均法,求得了系统满足3:1型内共振的解,分析了解的稳定性。     

Expert System for Demand Driven Extension

Looking the progress of cyber based information system in railways, air ways, commercial institutions, industries, medical institutions etc. a pertinent questions is raised that why not in agriculture？ It is however, realized that due to short supply of extension workers, their lower educational level and least per capita extension expenditure, the demand based extension services are not been provided to different kinds of clients. Due to diversification of agriculture, the needs are varying from farmer to farmer and area to area. Farmers need different calculated feasible, viable and economical practices to follow for better output and income. The socio-economic and agro-climatic situation of farmers in the same village is also different. Therefore, demand based extension services cannot be possible through our conventional system of extension with the available human and financial resources. So far, extension agents give the information what ever they know and not that what the farmers need. It is therefore suggested to develop cyber based extension system in our country, which provides all required information about all possible questions of the farmers. Keeping this point in view, an effort was made to develop an Expert System of Extension at Division of Agricultural Extension, Indian Agricultural Research Institute New Dlehi-12. The system was built in two phases. In the first phase the agricultural information of the selected crops have been collected from the authentic sources and stored in the form of a database. In the second phase, the decision rules were formulated and coded in the expert system. Both these phases are finally combined to form cyber-based expert system, which is hosted on the Internet for the use of the farmers and general public. This is a best combination of man and machine for efficiency and need to based on dissemination at a time to all farmers.     

宋代出版与宋代文学家庭

宋代的出版业渐趋繁盛，为宋代文学家庭的繁荣提供了条件。而文学家庭的繁荣又促进了出版业的发展。二者相互促进，共同为宋代文化的繁荣做出了不可低估的贡献。     

圆形叙述的黄昏－－余秋雨论

作为一个十分重要的学现象，余秋雨的异军突起越来越引起众多人的关注。本试图通过对余秋雨化散叙述模式的详细分析，来探讨他成功和失败、引起多人赞叹也引来不少人诟病的原因。余秋雨通过对中国古老的传统叙述方式－圆形叙述的借用、对大词和圣词的借用，成功地打动了读和征服了一个需要浪漫主义的阅读时代，从而在一个市场化的年代里，建立了他“散大师”的地位。     

外墙外保温挤塑板的施工工艺与质量控制

结合小高层外墙外保温系统的施工实践,分析和介绍了外墙外保温挤塑板的施工工艺与质量控制的要点。     

数据驱动激活教学管理机制变革研究

大数据是信息技术最新发展成果的典型代表,是社会各行业新一轮重大变革浪潮的主要推手,也对教育行业产生了重大影响.基于大数据的教学管理机制将传统的静态纸质化管理转变为动态数据化管理,特别是在作业管理机制和教师培养机制方面发挥不可估量的作用,让作业管理和教师培养达到个性化、精准化、智能化.