Automatic generation method of geological cross-sections in dredging engineering based on 3D solid NURBS models

An automatic generation method of geological cross-sections in dredging engineering based on 3D geological solid models is presented.The 3D geological models are built applying the non-uniform rational B-splines(NURBS) technique,and a 2D profile can be calculated and generated automatically through Boolean operation to meet the demands of dredging projects.Moreover,an automatic marking method for geological attributes is put forward based on database technology,and the geological attributes include the profile name,scale,horizontal and vertical relative coordinates,geological lithology,and 2D standard lithology legend.At the same time,the automatic marking method can also provide an interactive mode for geological engineers to edit and modify the profile in the modeling system.Practical engineering applications show that the automatic generation method is a simple,flexible,fast and precise visual graphics rendering process that can create 2D standard profiles automatically and efficiently.This method also provides a convenient support tool for geological engineering digital analysis.     

国际视野下的工作场所学习:特征与机制

工作场所学习有四个主要特征与优势:提供高质量的学习环境、促进从学校到工作的转换、确保职业教育符合劳动力市场的需求、提供高效的产出。发达国家保障工作场所学习主要从提供完善的质量标准与法律框架来开展。同时,政府为雇主提供了各种鼓励措施,主要包括财政措施与非财政措施。     

Hybrid Deterministic Views About Genes in Biology Textbooks: A Key Problem in Genetics Teaching

A major source of difficulties in promoting students’ understanding of genetics lies in the presentation of gene concepts and models in an inconsistent and largely ahistorical manner, merely amalgamated in hybrid views, as if they constituted linear developments, instead of being built for different purposes and employed in specific contexts. In this paper, we report the results of a study about how textbooks can provide the grounds for the students’ construction of such hybrid views about genes. These views are a key problem in genetics teaching, because they make it more difficult that students properly understand this central biological concept and strengthen genetic deterministic ideas, which characterize a widespread discourse about genes in the public opinion. We analyzed 18 textbooks using categorical content analysis, employing categories derived from the literature addressing the historical development of gene models and concepts. Our findings indicate that the analyzed textbooks do convey hybrid views about genes, with no correspondence to scientific models related to this biological concept. These views reinforce genetic deterministic discourses and may lead students to serious misunderstandings about the nature of genes and their role in living systems, with consequences to future learning about genetics.     

数学的意义与数学教育的价值

关于数学的意义,数学界缺乏面向公众的,正确而简明易懂的解释。数学最重要的特征是其研究对象的抽象性。在历史上,数学是重要的,在高科技的如今,同样重要。中学数学教育的目的包括三个方面:传授初等数学知识;进行逻辑推理训练;培养科学精神。     

经验教师数学课堂教学策略的个案研究——以九年级“二次函数图像平移”的教学为例

在课程改革的背景下,选择了对初中学生而言具有一定难度的教学内容——二次函数图像的平移,并以此为载体探究一位中国经验教师课堂教学策略.发现这位数学教师在教学中采用了"先整体,后细节"的教学策略,体现了数学课程改革的教学理念,不过教师对学生认知特征的认识还有待进一步提高。     

网络环境对高职应用文教与学的影响及对策思考

现实工作中,应用文写作能力很重要。但在高职院校,应用文写作教与学却面临窘境。笔者结合切身经历,分析了网络环境对高职应用文教与学的影响,并思考提出了相应对策。     

英汉语对比的文化维度——以禁忌语为材料

在跨文化交际过程中,不可避免地要遇到禁忌语。本文探讨了中西禁忌语的共性和个性,并从多角度分析了英汉禁忌语产生的因素。研究显示,对英汉语言禁忌的研究不仅有益于跨文化交际研究,也有益于宏观语言研究和人类语言认知机制研究。     

英文声像资料在导游英语教学中的应用

英文声像资料是一种形象生动的教学手段,将其与导游英语教学相结合,能够提高学生的学习兴趣,使学生掌握纯正地道的语言知识,体验丰富的中西文化内涵,培养跨文化交际能力,进而完善专业素质建设。本文通过笔者的《涉外导游英语》教学实践证实了英文声像资料教学的独特优势。     

浅谈教学秘书在学院创新人才培养模式工作中的能力培养

教学秘书是学院教学管理过程中的具体执行者,配合学院领导在学院的创新人才培养模式工作中发挥着巨大的作用。因此,挖掘教学秘书的创新能力对学院的创新式教学具有非常重大的意义。     

项目教学法在CAD/CAM课程中教学设计与实践

在CAD/CAM课程教学中,如何解决软件课程本身枯燥难懂而且学习与教学效果不太理想的问题,一直是我们关心的课题。同时也受建构主义的影响,在基于工作过程的课程建设与教学改革中,笔者就项目教学法在CAD/CAM课程中进行了反思和教学设计与实践。