“桂阳”考

“桂阳”作为古老的地名,由来已久,包括史书在内,对其多有误解。而此名如何产生,则更是众说纷纭,难以有统一的认识。本文参考众多古籍,从地名的源起,到几千年的历史变迁,进行了系统的整理。     

关于测控专业学员电磁学前概念的研究

介绍了一种转变前概念的教学策略。以建构主义学习理论为指导,以电磁学六个方面的含前概念的调查问卷为工具,通过对测控专业学员321名学员的问卷调查。得出学员在电磁学存在的一些典型的前概念。电磁学教学的关键在于促进学生的概念转变,学习是否发生是依据概念发展而不是依据新信息的零星累计来判断的。     

康德的美的特质探析

康德从质、量、关系、方式四个方面对美的特有本质理论进行了较为系统地阐述,不仅为现代美学(艺术)的发展确立了基本的理论方向,且已内化为现代人的一种生存方式和人生态度,成为生活价值与意义的最高源泉.     

基于SWMM的地表径流量与城市下垫面和降雨特征关系的空间分析——以中国科学院大学雁栖湖校区为例

以中国科学院大学雁栖湖校区为例,用城市雨洪管理模型（SWMM）模拟2016-2017年48场降雨事件中所有子汇水小区的径流过程;在验证可靠的基础上,探讨径流量空间分布与降雨和下垫面的关系,是开展防汛工作的重要基础。结果表明,径流量高值区多位于沥青小区,而低值区多位于绿地小区。沥青最易产流,绿地最不易产流。砌砖易产生中等量级的径流,混凝土较砌砖更易产流,但二者在不同降雨事件下的产流规律相似。沥青小区和砌砖小区的地表径流量均与坡度呈极显著或显著线性正相关关系。对沥青-砌砖和沥青-绿地小区,将非渗透面积比例（PIC）降至60%可明显控制其暴雨和大雨径流。要明显控制大暴雨径流,可将沥青-绿地小区的PIC降至30%以下;但降低PIC对沥青-砌砖小区大暴雨径流的控制作用不明显。研究结果可为海绵城市建设和城市内涝防洪提供理论依据和决策建议。     

课程群网络智能教学平台构建浅析

依据现代网络教育的特点,本文提出了一个课程群网络智能平台的教学模型,并就其中的知识结构和功能作了详细的叙述,同时给出了该系统的设计实现模型,为解决各门课程的网络课件之间的信息融合沟通、相互衔接提供了可行性论据。     

网络模式下的环境监测教学

文章通过对环境监测课程教学内容改革的探索、网络学CAI课件的研制、网络教学中应注意的问题三个方面的论述,以期更好地培养环境科学专业学生的自主创新能力。     

农村薄弱学校运用现代教育技术的思考

农村薄弱学校的产生有着较为深刻的历史原因和社会原因,并成为实施九年制义务教育和全面推进素质教育的重要障碍。近几年来,政府和各地教育行政部门已认识到农村薄弱学校存在的严重弊端,将加强学校建设作为推进素质教育的一个突破口,并有针对性地采取了一些措施。我们认为,在加强农村薄弱学校建设的过程中,应充分认识和发挥现代教育技术优化教学效果、提高教育质量的重要作用,将现代教育技术作为农村薄弱学校改造过程中提高教师教学水平、优化学生学习效果、全面推进素质教育的重要手段。一、农村薄弱学校的差距据统计,就我国的中小学而言,…     

Effects of periodic carbohydrate ingestion on endurance and cognitive performances during a 40-km cycling time-trial under normobaric hypoxia in well-trained triathletes

The purpose of this study was to examine CHO ingestion on a cognitive task using a field-simulated time-trial (TT) under hypoxia in well-trained triathletes. Ten male triathletes (age: 22.1 ± 1.1 years; VO₂max: 59.4 ± 1.4 ml/kg/min) participated in this double-blind/crossover/counter-balanced design study. Participants completed 3 TT trials: 1) normoxic placebo (NPLA; FiO₂ = 20.9%), 2) hypoxic placebo (HPLA; FiO₂ = 16.3%), and 3) hypoxic CHO (HCHO; 6% CHO provided as 2 ml/kg/15 min; FiO₂ = 16.3%). During the TT, physiological responses (SpO₂, HR, RPE, and blood glucose/lactate), cognitive performance, and cerebral haemodynamics were measured. Hypoxia reduced TT performance by ~3.5–4% (p < 0.05), but CHO did not affect TT performance under hypoxia. For the cognitive task, CHO slightly preserved exercise-induced cognitive reaction speed but did not affect response accuracy during hypoxic exercise. However, CHO did not preserve the decreased Hb-Diff (cerebral blood flow, CBF) and increased HHb in the prefrontal lobe (p < 0.05) during hypoxic exercise, and CHO failed to preserve hypoxia-suppressed prefrontal CBF and tissue oxygen saturation. In conclusion, the present study demonstrates that CHO is effective in sustaining reaction speed for a cognitive task but not promoting TT performance during hypoxic exercise, which would be important for strategy-/decision-making when athletes compete at moderate high-altitude.     

ORIGINAL PRINT PAINTING RISES WITH POTENTIAL VALUES FOR COLLECTION

Printing painting usually refers to varieties of painting printed on wood, stone, linoleum, copper and zinc blocks carved by knife or etched by chemicals. China is generally recognized as the inventor of printing painting, but for quite a long time, it has had a poor market for print painting trade, with only few collectors dedicated to for this type of painting. In recent years, with print paintings by master artists gaining outstanding performance in the international market, values of original print painting have begun to be recognized in China＇s collection market.     

“文物饭店”新新

“我的先生是‘五四’启蒙运动的领袖之一。他那些明白、清楚的著作,陪伴在我成长的年代。我当时是台大史学系本科生,曾经拜见过先生三次,对他平易近人的民主风度,印象深刻,心存感激。”2008年盛夏,已逾耄耋之年的台湾著名学者林毓生,在下榻的杭州新新饭店403室,写下了这样—段遣忆往事、流露真情的文字。