A NEW ALGORITHM FOR FAST HIDDEN SURFACE REMOVAL OF COMPLEX OBJECTS

ＡＮＥＷＡＬＧＯＲＩＴＨＭＦＯＲＦＡＳＴＨＩＤＤＥＮＳＵＲＦＡＣＥＲＥＭＯＶＡＬＯＦＣＯＭＰＬＥＸＯＢＪＥＣＴＳＦｕＹｕｑｉｎｇ（富煜清）；ＨｕａｎｇＪｉｎｆａ（黄金法）；ＬｉｎＦｅｎｇ（林峰）（ＤｅｐａｒｔｎｉｅｎｔｏｆＲａｄｉｏＥｎｓｉｎｅｅｒｉ...     

On mathematical understanding: perspectives of experienced Chinese mathematics teachers

Researchers have long debated the meaning of mathematical understanding and ways to achieve mathematical understanding. This study investigated experienced Chinese mathematics teachers’ views about mathematical understanding. It was found that these mathematics teachers embrace the view that understanding is a web of connections, which is a result of continuous connection making. However, in contrast to the popular view which separates understanding into conceptual and procedural, Chinese teachers prefer to view understanding in terms of concepts and procedures. They place more stress on the process of concept development, which is viewed as a source of students’ failures in transfer. To achieve mathematical understanding, the Chinese teachers emphasize strategies such as reinventing a concept, verbalizing a concept, and using examples and comparisons for analogical reasoning. These findings draw on the perspective of classroom practitioners to inform the long-debated issue of the meaning of mathematical understanding and ways to achieve mathematical understanding.     

整合文化:图书馆社会职能新论

指出图书馆“保存文化遗产”职能说的不完整性;界定图书馆整合文化职能的深刻内涵;并通过对图书馆有关职能传统说法的阐释,分析图书馆整合文化职能的价值取向;阐明整合文化才是表征图书馆“保存”社会职能的科学说法。     

新视角:图书馆资源的优化配置与产业化

社会主义市场经济体制的构建和社会主义市场经济的发展，将驱动我国的图书馆事业逐步趋向产业化发展的道路，图书馆资源的优化配置是图书馆产业化的内在要求。要想实现图书馆资源的优化配置，图书馆务须主动面向市场，遵循市场经济的一般规律和原则，实施图书馆的服务和教育资本经营。     

企业创业导向与组织绩效关系的元分析

企业创业导向与组织绩效关系的研究是目前公司创业领域中最受关注的议题,而不同研究发现创业导向对组织绩效的作用并不一致。本文通过检索学术数据库之重要期刊中从1983年到2009年(也包括一篇2010年的)关于企业创业导向与组织绩效关系的研究文献,在对符合要求的30篇文献的基础上,对二者之间的关系进行了元分析,结果表明二者之间存在显著的关系,同时探索了可能调节二者之间关系的变量,并提出未来研究的方向。     

闽台双地域人才培养模式下教学管理改革研究

针对闽台"双地域"人才培养模式下教学管理中存在的主要问题,结合近年来福建省高校闽台合作办学项目教学管理的实践,对完善闽台合作办学项目教学管理提出了改革的具体举措。     

Future themes of mathematics education research: an international survey before and during the pandemic

Educational Studies in Mathematics - Before the pandemic (2019), we asked: On what themes should research in mathematics education focus in the coming decade? The 229 responses from 44...     

萤火虫萤光素酶基因转化花叶芋及表达的研究

将萤火虫萤光素酶基因重组到质粒pBR325中,通过“三亲交配”和同源重组,将萤光素酶基因整合到Ti质粒pGV3850:1103。通过改良的叶盘转化法,用萤光素酶基因转化单子叶植物花叶芋,获得转基因植株。对再生植株的胭脂碱测定、新霉素磷酸转移酶分析、DNA点杂交、萤光素酶基因活性测定,证明萤光素酶基因已转化到花叶芋中并进行了表达。     

Investigating Elementary and Middle School Students’ Subjective Well-Being and Mathematical Performance in Shanghai

Students in Shanghai ranked at the top in mathematics on the past two assessments of the Program for International Student Assessment (PISA). However, even though Asian students in general, and Chinese students in particular, ranked at the top in mathematics, we know little about Shanghai students’ subjective well-being (SWB). This paper reports two studies that investigated the SWB of elementary and middle school students in Shanghai, as well as their mathematics performance. It is found that the mean scores of elementary school students on all scales of SWB are significantly higher than those of middle school students, representing a large drop for students when moving from elementary to middle school. Furthermore, students’ mathematics performance is moderately correlated with their SWB. And for Grade 6, students’ SWB affects their mathematics performance, especially from academic self-concept, attentiveness in the classroom, and relationship with teachers.     

Generating multiple solutions for a problem: A comparison of the responses of U.S. and Japanese students

A task involving simple mathematics, yet complex in its call for the generation of multiple solution methods, was administered to about 150 U.S. students, most of whom were in fourth grade. Written responses were examined for correctness, evidence of strategy use and mode of explanation. Results for the U.S. sample were also compared to those obtained from about 200 Japanese fourth-grade students. Students in both countries (a) produced multiple solutions and explanations of their solutions, (b) exhibited almost identical patterns and frequency of strategy use across response occasions, and (c) used the same kinds of explanations, with a majority of the responses involving solution explanations that combined both visual and verbal/symbolic features. Nevertheless, Japanese students tended to produce explanations involving more sophisticated mathematical ideas (multiplication rather than addition) and formalisms (mathematical expressions rather than verbal explanations) than did U.S. students.