畜禽生产区常用消毒剂杀菌效果监测方法探讨     

周志远  黄华英  曾培林 《科教文汇》2011,(24):134-136

本试验以菌毒敌、烧碱等常用消毒剂为代表,监测它们在人车进出畜禽生产区消毒池中的杀菌抑菌效果,对已知大肠杆菌的最小抑菌浓度及其有效浓度持续时间的变化情况,测得烧碱的最小抑菌浓度为0.25%、菌毒敌为0.16%,按菌毒敌使用说明配制的浓度在消毒池中持续到第九天仍有较好的抑菌效果。  相似文献   

试论中职体育如何体现职业特色     

黄华敏  易鹏 《科教文汇》2011,(24):148-150

体育教育是中等职业教育的重要组成部分,对培养学生较强的综合身体素质和良好的健身习惯起着非常重要的作用。同时中职体育还肩负着为专业课提供专项运动能力保障的职责,因此,将专业需求与体育相结合,在体育教育中体现职业特色是我们改革发展的方向。本文从中职体育的现状及存在的问题、中职体育教学改革发展策略、进行体育特色改革面临的困难及应对措施几个方面进行了探讨。  相似文献   

浅析简·奥斯丁《劝导》中女主人公安妮·埃利奥特     

黄婷婷 《科教文汇》2011,(25):88-89

简·奥斯丁是19世纪初期英国著名的女性作家《劝导》是其最后也是最好的一部小说。作者通过对女人公安妮·埃利奥特的爱情与婚姻的描写,表现出自己的成熟和发展。  相似文献   

关于体育院校学生思想品德教育工作的创新     

黄吉雄 《科教文汇》2011,(31):25-25,76

体育院校学生的思想品德工作有其特殊性,如何确保教育工作卓有成效成为当前研究的重点问题。本文首先分析体育院校学生思想品德教育工作的现状,明确存在的主要问题,然后探讨思想品德教育工作创新的方向,并具体规划实践举措,以期为今后的工作提供帮助。  相似文献   

向内探索自己     

黄承基 《科教文汇》2011,(31):73-73,94

诗发自心灵,诗人必然走向自己内心的探索之路,以塑造一个理情与感情相兼容的精神世界。  相似文献   

翻译过程中的中介语发展特点及规律研究     

罗雷  黄敏  苏曼 《科教文汇》2011,(32):170-170,175

中介语是用来描述介于二语学习者母语与目的语之间的一种非连续性的语言体系,目前在二语习得研究中日益受到关注。文章以我国英语专业学习者中介语的翻译语料为基础,以学习者中介语的语篇、语用、学习策略等为研究本体,通过多种形式,系统地研究并揭示汉英中介语在英语学习者提高翻译技能的过程中所体现出的发展规律及其影响作用。  相似文献   

Three-dimensional cellular focusing utilizing a combination of insulator-based and metallic dielectrophoresis     

Huang CT  Weng CH  Jen CP 《Biomicrofluidics》2011,5(4):44101-4410111

Particle focusing in microfluidic devices is a necessary step in medical applications, such as detection, sorting, counting, and flow cytometry. This study proposes a microdevice that combines insulator-based and metal-electrode dielectrophoresis for the three-dimensional focusing of biological cells. Four insulating structures, which form an X pattern, are employed to confine the electric field in a conducting solution, thereby creating localized field minima in the microchannel. These electrodes, 56-μm-wide at the top and bottom surfaces, are connected to one electric pole of the power source. The electrodes connected to the opposite pole, which are at the sides of the microchannel, have one of three patterns: planar, dual-planar, or three-dimensional. Therefore, low-electric-field regions at the center of the microchannel are generated to restrain the viable HeLa cells with negative dielectrophoretic response. The array of insulating structures aforementioned is used to enhance the performance of confinement. According to numerical simulations, three-dimensional electrodes exhibit the best focusing performance, followed by dual-planar and planar electrodes. Experimental results reveal that increasing the strength of the applied electric field or decreasing the inlet flow rate significantly enhances focusing performance. The smallest width of focusing is 17 μm for an applied voltage and an inlet flow rate of 35 V and 0.5 μl/min, respectively. The effect of the inlet flow rate on focusing is insignificant for an applied voltage of 35 V. The proposed design retains the advantages of insulator-based dielectrophoresis with a relatively low required voltage. Additionally, complicated flow controls are unnecessary for the three-dimensional focusing of cells.  相似文献   

Effects of curricular activity on students' situational motivation and physical activity levels     

Gao Z  Hannon JC  Newton M  Huang C 《Research quarterly for exercise and sport》2011,82(3):536-544

The purpose of this study was to examine (a) the effects of three curricular activities on students'situational motivation (intrinsic motivation [IM], identified regulation [IR], external regulation, and amotivation [AM]) and physical activity (PA) levels, and (b) the predictive strength of situational motivation to PA levels. Four hundred twelve students in grades 7-9 participated in three activities (cardiovascular fitness, ultimate football, and Dance Dance Revolution [DDR]) in physical education. ActiGraph GT1M accelerometers were used to measure students' PA levels for three classes for each activity. Students also completed a Situational Motivation Scale (Guay, Vallerand, & Blanchard, 2000) at the end of each class. Multivariate analysis of variance revealed that students spent significantly higher percentages of time in moderate-to-vigorous PA (MVPA) in fitness and football classes than they did in DDR class. Students reported higher lM and IR toward fitness than DDR They also scored higher in IR toward fitness than football. In contrast, students displayed significantly lower AM toward fitness than football and DDR Hierarchical Linear Modeling revealed that IM was the only positive predictor for time in MVPA (p = .02), whereas AM was the negative predictor (p < .01). The findings are discussed in regard to the implications for educational practice.  相似文献   

人工智能伦理准则与治理体系:发展现状和战略建议   总被引：1，自引：0，他引：1  

陈磊  黄思翰  王柏村  张吉豫  郭锐  鲁俊群 《科技管理研究》2021,41(6):193-200

首先,界定人工智能伦理准则的基本概念,分析人工智能发展现状。然后,探讨导致人工智能伦理问题的主要原因,总结人工智能典型应用场景下的伦理问题,包括自动驾驶、智能媒体、智慧医疗、服务机器人等;此外,围绕应对人工智能伦理问题的基本原则探索治理框架体系,包括技术应对、道德规范、政策引导、法律规则等方面。最后,结合我国人工智能发展规划战略部署,指出在社会治理的落地过程中宜采取分层次、多维度的治理体系,并提出在人工智能伦理准则和治理方面的具体措施建议(2020-2035年),包括社会宣传、标准体系、法律法规等方面。  相似文献   

组织忘却学习如何影响绩效：基于元分析的证据     

郑明玉  徐梦丹  马文聪  黄攀 《科技管理研究》2021,41(13):176-182

利用元分析方法对国内外43篇组织忘却学习与绩效关系的实证研究进行分析,并探讨测量维度、地区文化和中介变量等因素是否会影响二者关系.研究结果表明,组织忘却学习与绩效显著正相关,测量维度、地区文化和中介变量对二者关系有显著的影响,在单维度测量、东方文化背景下或有中介变量存在时,组织忘却学习与其绩效的相关程度更高.  相似文献