Subdivision surface modeling system based on arbitrary topological curves network and combined subdivision

Arbitrary topological curve network has no restriction in topology structure,so it has more powerful representing ability in defining complex surfaces.A complex surface modeling system is presented based on arbitrary topological curve network and the improved combined subdivision method,its functions including creating and editing curve network,and generating and modifying curve network's interpolated surface.This modeling system can be used to the process of products'concept design,and its applications is ...     

4-component 2-D CFDFD method in analysis of lossy circular waveguide with fractal rough surface

In this paper, equivalent surface impedance boundary condition (ESIBC), which takes fractal parameters (D, G) into SIBC, is implemented in the 4-component 2-D compact finite difference frequency domain (2-D CFDFD) method to an- alyze the propagation characteristics of lossy circular waveguide with fractal rough surface based on Weierstrass-Mandelbrot (W-M) function. Fractal parameters’ effects on attenuation constant are presented in the 3 mm lossy circular waveguide, and the attenuation constants of the fi...     

学习效能感在高中生班级环境与 学习动机间的中介效应

为考察高中生学习效能感在班级环境与学习动机间的中介效应,采用学习动机、学 习效能感和班级环境问卷调查403名高中生.结果表明:(1)女生威信动机高于男生;男生 学习效能感高于女生;师生关系一年级好于二年级,女生好于男生;(2)学习动机与师生关 系、竞争、基本能力感和控制感正相关;基本能力感与秩序纪律负相关,与同学关系和控制 感正相关;控制感除学习压力外,与班级环境其他维度正相关.(3)基本能力感在秩序纪律 和学习动机间具有中介作用,控制感在竞争和学习动机间具有中介效应.高中生学习动机 的激发与维持的关键是提高学生的学习效能感,适当的竞争环境与相对民主、自由的班级 氛围有利于学生学习效能感的提高.     

高职英语专业学生学习动机的实证研究

以阜新高等专科学校英语系学生为对象的实证研究结果表明,高职院校英语专业学生的学习动机有受迫动机、工具型动机、融合型动机和内在兴趣型动机,四种动机之间存在明显差异：受迫型动机比例最高,内在兴趣型比例最低,动机总体水平不高。基于此,要通过设置具体目标、培养学习兴趣、利用原有动机的迁移、引导学生正确归因等方法注重培养学生高水平的学习动机,以提高教学效果。     

当代大学生恋爱动机特点及教育建议

采用自编大学生恋爱动机问卷,用分层随机取样的方法抽取2014名大学生作为有效测试的被试。结果表明,当代大学生恋爱动机总体上是积极的,主要以情感性与婚姻性的积极动机为主,但在消遣性上存在显著的年级、性别、是否独生子女、专业类型、恋爱情况、家庭教养方式差异。根据当代大学生的恋爱动机的发展特点,从个人、学校、家庭方面进行相应的恋爱动机教育。     

Modelling parenting styles,moral intelligence,academic self-efficacy and learning motivation among adolescents in grades 7–11

The current study investigated the associations between three maternal and paternal parenting styles, moral intelligence, academic self-efficacy and learning motivation in three serial mediation models. Omani adolescents enrolled in 7th to 11th grades (N = 296) responded to an online survey containing demographic items and scales measuring the variables noted above. Results of Path Analysis indicated that the three models had a good overall fit. In detail, the three paternal styles (authoritative, authoritarian and permissive) had direct associations with moral intelligence and indirect associations with learning motivation. However, only two maternal parenting styles (i.e., authoritative and authoritarian) correlated directly with learning motivation and these two styles did not associate with moral intelligence. All effects were in the hypothesized direction except the effect of authoritative maternal and paternal styles. Moral intelligence had a positive direct correlation with students’ academic self-efficacy and learning motivation. Moral intelligence also mediated the negative associations between three types of fathers’ parenting styles and students’ motivation. Academic self-efficacy had a positive association with students’ motivation. These findings provided useful insights about the various association between external factors (e.g., parenting styles), internal factors (i.e., moral intelligence and self-efficacy) and students’ motivation among adolescents in middle and high schools.     

Effective extraction of elastase from Bacillus sp. fermentation broth using aqueous two-phase system

INTRODUCTION Aqueous two-phase system (ATPS) is widely used in biochemistry and biotechnology for purifica- tion of proteins (Diamond and Hsu, 1992; Balasubramaniam et al., 2003), enzymes (Pan et al., 2001; Bim and Franco, 2000), amino acids (Li et al., 2002), antibiotics (Yang et al., 1994; Guan et al., 1994), nucleic acids (Ohlsson et al., 1978; Kimura, 2000), aroma compounds (Marco et al., 2000) and lactic acid (Planas et al., 1998). ATPS is mainly composed of two-incompatible p…     

三个连续的发现与用几何方法研究数论的新构想

在对毛比斯面的证明方法的深入研究中，发现了一种证明方法——“递推法”；在对“递推法”的进一步探索中，发现了一类新几何体——“棱环体”；在研究“棱环体”的边数的变化规律中，得到了一张“数表”，对“数表”的进一步研究，又相继发现了“最大公约数定理”、“素数规律”等．“棱环体”的发现，引发了“扭曲几何学”的构想；“数表”的发现，为一种新的数论研究方法——“数论的几何研究法”的提出，奠定了基础。     

跨越时空的文化撒播——论网络文学的特征

网络和网络文学是伴随着西方“后现代化”而孕育、萌芽、成长、繁荣起来的，因而不可避免地带有后现代主义的特征，诸如认知上的反理性主义、道德上的犬儒主义和感性上的快乐主义。尽管学术界对网络文学众说纷纭，莫衷一是，但网络文学大量客观存在着。网络文学具有以下特征：创作主体的网民化；创作动机的娱乐化；文本特征的立体化；作者读者的互动化；文本传播的快捷化：文本价值的多元化。网络写手大多年轻化、城市化、小资化，主要为白领阶层和大学生，往往从事网络、金融、法律、编辑、广告、艺术设计等工作，网络技术异常娴熟。网络文学自诞生之日起就带有游戏的味道，不少网络写手就曾坦言，自己的创作就是为了自娱娱人。在创作主题和思想内容上，网络文学回避崇高，消解载道，拒绝代言，推卸责任，追求愉悦。在创作手段上，网络写手广泛运用“拼贴”、“意识流”、“蒙太奇”等艺术表现手法，使网络作品呈现出前所未有的独特魅力和意蕴。网民的点击、评说以及网站的定期TOP排行榜大大激发了网络写手的创作热情，网民的参与不仅仅表现在阅读的选择和评点上，有时更直接地表现在参与创作上，即网民的回帖和评论，也成为网络小说的有机组成部分。文本传播的快捷化表现在作品面世的快捷化、读者反馈的快捷化和文本更新的快捷化。网络文学活动的核心是网民的创作、阅读、评论几乎同时展开，同步进行，共同完成，所以它比以往任何传媒对文学的推动力、冲击力都大。     

周口市地表水环境污染状况及改善措施

根据地表水的检测结果讨论了周口市地表水环境污染的状况，提出了改善措施，为周口市治理水环境污染工作提供了依据。