跨国移民时代加拿大多元文化课程建构——基于跨国主义与跨文化主义

跨国移民时代的到来向加拿大长久以来实施的多元文化教育政策提出了新的挑战和要求。研究者对当前加拿大公立学校官方课程所表现出来的欧洲中心主义、国家身份均质化和赞颂式多元文化等弊端进行了深刻的批判性分析,为重新审视多元文化教育提供了不同的视角和观点。在跨国流动性日益增强的趋势下,研究多元文化教育如何影响跨国移民及其子女的身份认同、文化适应和社会融合等问题,有必要运用跨国主义和跨文化主义理论框架对现有课程作出修正。     

基于MATLAB的Reed-Solomon编解码仿真

RS纠错码被广泛用在各种数字通信、数字广播和数据存储系统中.本文解释了纠错理论及RS码的相关原理,通过MATLAB仿真分析RS编码的误码率与信噪比之间的关系.     

福建城市投资环境比较研究

本文从城市投资环境的基本理论着手,建立福建城市投资环境的综合评价指标体系.应用主成分分析法,对福建省9个设区城市的投资环境进行综合评价和排序,得出各城市投资环境的优越性及存在问题,对如何进一步改善投资环境提出建议.     

对教育如何“面向现代化,面向世界,面向未来”的反思

当前中国的现实,以及在未来20年内即将出现的态势,引起了我们对教育如何贯彻“三个面向”问题的反思：我们只有清楚地认识到科学和教育在推进中国社会经济腾飞中的决定性作用;全面把握马克思主义有关社会生产力理论的科学内涵,即科学技术和劳动者是决定生产力发展的最主要因素;准确地理解和全面掌握历史唯物主义有关教育的性质、地位及其在社会生活中的重要性,即教育既是上层建筑,又是生产力的双重属性,才能实现教育的“三个面向”。     

学校转型性变革中的评价改革——基于"新基础教育"成型性研究中期评估的探究

"新基础教育"通过成型性研究中期评估的研究和实践,形成了"推进型评价"概念.本文在分析学校转型性变革中推进型评价的性质基础上,介绍了推进型评价指标体系构成的特点与权重分配,同时揭示了"新基础教育"成型性研究中期评估活动过程中的方法论思想,及评估活动对所有参与者产生的评估效应和发展价值.     

新型表面活性剂3-十二烷氧基-2-甲基丙酸钠的合成

通过增加皂类表面活性剂分子中亲水基的总数，可以提高其抗硬水性能，为此，在亲油基与羧基之间引入烷氧基，该研究以甲基丙烯酸和十二醇的主要原料，采用加成，酯化，取代，皂化四步法合成3-十二烷基-2-甲基丙酸纳，其中，杂多酸对酯化反应起到了催化和阻聚双重作用；相转移催化剂用于取代反应，简化了操作，缩短了反应时间，提高了产率。     

Tandem Biocatalysis by CotA-TJ102@UIO-66-NH2 and Novozym 435 for Highly Selective Transformation of HMF into FDCA

2,5-Furandicarboxylic acid(FDCA) is a potential biorenewable chemical for applications including plastics, polyamides, drugs, etc. The selective biosynthesis of FDCA from 5-hydroxymethylfurfural(HMF) by a specific enzyme poses a great challenge. In this study, we reported an efficient strategy to produce FDCA from HMF by the tandem biocatalysis of laccase(Cot A-TJ102@UIO-66-NH_2) and Novozym 435. For the first step, a nanoparticle metal–organic framework was synthesized as a carrier to immobilize Cot A-TJ102@UIO-66-NH_2, which was assigned for the production of 5-formyl-2-furancarboxylic acid(FFCA) and featured an enzyme loading of 255.54 mg/g, specific activity of 135.90 U/mg, and solid loading ratio of 99.65%. Under optimal conditions, an ideal FFCA yield of 98.5% was achieved, and the Cot A-TJ102@UIO-66-NH_2 presented a high recycling capacity after 10 cycles. For the second step, Novozym 435 was applied for the further conversion of FFCA into FDCA, presenting a high FDCA yield of 95.5% under the optimized conditions. Novozym 435 also exhibited a high recyclability after eight cycles. As a result, the tandem biocatalysis strategy provided a 94.2% FDCA yield from HMF, indicating its excellence as a method for FDCA production.     

Investigation of iodine concentration in salt,water and soil along the coast of Zhejiang,China

Objective: We aim to describe the environment iodine concentration in salt, water and soil along Zhejiang Province coast in the China foreland. It will be helpful for us to judge whether this area is insufficient in iodine and universal iodized salt is necessary or not. Methods: We collected iodized salt samples, drinking water samples (tap water in the towns, and well water or spring water in the villages), water samples from different sources (ditches, lakes, rivers) and soil samples through random sampling in June, 2005. Salt, water and soil iodine was detected by arsenic-cerium redox method. Statistical analysis was expressed as mean±SEMby Windows SPSS 13.0. Results: (1) The iodine concentration in salt was 27.9±4.33 mg/kg (n=108). (2) Seventy-five water samples were collected. The water iodine value was 0.6～84.8 μg/L (mean of 11.66 μg/L). The watershed along the Qiantang River has significantly higher iodine content than the water in Lin'an in mountain area (P＜0.01). The iodine content and mean iodine content of tap water, well or spring water and natural water sources were 4.30±2.43 μg/L (n=34), 23.59±27.74 μg/L (n=19)and 12.72±10.72 μg/L (n=22) respectively. This indicated that among environmental water sources, the ditch iodine content was the highest with river water iodine being the lowest (P＜0.01). (3) Soil iodine value was 0.11～2.93 mg/kg (mean of 1.32 mg/kg).Though there was no statistical difference of soil iodine in different districts (P=0.131), soil iodine content correlated positively with water iodine content. Conclusion: Iodine concentration in salt accords with national policy of adding iodine in salt. Foreland has more iodine in water than mountain area. The data reflected that water and soil iodine in foreland area was not high, which suggests universal iodized salt should be necessary. Environment iodine has relatively close association with pollution.     

网络三维虚拟实验系统的设计与实现

根据虚拟现实技术特性,结合代表性的案例,分析网络三维虚拟实验系统的基本构成框架。依据虚拟实验系统的开发流程,以化学虚拟实验《实验室制取气体》的开发为例,介绍了基于Virtools开发网络三维虚拟实验系统的方法和过程。最后,对网络三维虚拟实验系统的开发应用进行了总结与展望。     

略论民主革命时期毛泽东反腐倡廉的思想及其意义

民主革命时期毛泽东反腐倡廉的思想主要包括:关于反腐倡廉的重要性、关于反腐倡廉的主要内容等,论述了毛泽东反腐倡廉思想的历史意义和对现实的启迪意义。