国家创新体系的发展演进分析与若干思考

国家创新体系是国家安全和经济社会发展的重要支撑,在长期的历史演进和选择建构中不断发展演变。文章结合历史回溯与逻辑分析,以科技发展规律为主线,揭示了国家创新体系演进的一般规律和总体趋向,梳理总结了我国国家创新体系的建设实践,提出了完善国家创新体系的架构特征和提升我国国家创新体系整体效能的思路建议。     

扩散工艺对6.5%WtSi高硅钢性能的影响

本文简要介绍了用电沉积-扩散工艺制造Fe-65mg.g-1高硅钢片的研制工作。电沉积工艺具有低温沉积、无强烈腐蚀、无污染、成本低、工艺操作性好的特点。对于0.5mm厚的硅钢片,用电沉积-扩散工艺处理后的磁性能为:P1.5/50=1.86 w/kg,P0.2/10000=103.2w/kg,B5000=1.64T,磁性能可与日本NKK公司CVD工艺产品相媲美。     

新FRP技术加固钢筋混凝土矩形柱改善延性的试验研究

Reinforced concrete （RC） columns lacking adequately detailed transverse reinforcement do not possess the necessary ductility to dissipate seismic energy during a major earthquake without severe strength degradation. In this paper, a new retrofit method, which utilized fiber-reinforced plastics （FRP） confinement mechanism and anchorage of embedded bars, was developed aiming to retrofit non-ductile large RC rectangular columns to prevent the damage of the plastic hinges. Carbon FRP （CFRP） sheets and glass FRP （GFRP） bars were used in this test, and five scaled RC columns were tested to examine the function of this new method for improving the ductility of columns. Responses of columns were examined before and after being retrofitted. Test results indicate that this new composite method can be very effective to improve the anti-seismic behavior of non-ductile RC columns compared with normal CFRP sheets retrofitted column.     

DNA microarray wet lab simulation brings genomics into the high school curriculum

We have developed a wet lab DNA microarray simulation as part of a complete DNA microarray module for high school students. The wet lab simulation has been field tested with high school students in Illinois and Maryland as well as in workshops with high school teachers from across the nation. Instead of using DNA, our simulation is based on pH indicators, which offer many ideal teaching characteristics. The simulation requires no specialized equipment, is very inexpensive, is very reliable, and takes very little preparation time. Student and teacher assessment data indicate the simulation is popular with both groups, and students show significant learning gains. We include many resources with this publication, including all prelab introductory materials (e.g., a paper microarray activity), the student handouts, teachers notes, and pre- and postassessment tools. We did not test the simulation on other student populations, but based on teacher feedback, the simulation also may fit well in community college and in introductory and nonmajors' college biology curricula.     

“探究学习”法在教师现代教育技术培训中的应用研究

本文在分析了教师现代教育技术培训和“探究学习”各自特点的基础上,得出了“探究学爿”法非常适用于教师现代教育技术培训的结论,并结合淮海工学院教师现代教育技术培训工作的具体实践,分析了“探究学飞”法在实施过程中教师应起到的作用,文章最后通过对几年来培训数据的对比和分析,验证了上述结论,并阐述了培训中应注意的问题。     

Interleukin-6 polymorphisms modify the risk of periodontitis： a systematic review and meta-analysis

Objective  

To clarify the association of IL-6 polymorphisms and periodontitis, a meta-analysis of case-control studies and a systemic review were conducted.     

基于CoI序列对鹀亚科分子系统发育关系研究

以线粒体DNA的CoI基因全序列作为分子标记,对鹀亚科19种鸟类系统发生关系进行了分析．结果显示：全序列中含有保守位点810个,可变位点403个,简约信息位点269个．采用邻接法、最大简约法分别构建系统发生树,结果表明：铁爪鹀（Calcarius lapponicus）在鹀亚科中首先分化出来;蓝鹀（Latoucheornis siemsseni）和黄喉鹀（Emberiza elegans）亲缘关系较近,认为蓝鸦是鹀属（Emberiza）类群的一个种,不支持将它单列为一个属;小鹀（Emberiza pallasi）与红颈苇鹀（Emberiza yessoensis）之间具有较近的亲缘关系,形成姐妹关系．     

内江市生活垃圾填埋场垃圾渗滤液中Pb和Cd的测定

采用石墨炉原子吸收分光光度法对内江市高桥镇垃圾填埋场垃圾渗滤液中的重金属进行分析,测定了距垃圾填埋场不同距离地方的渗滤液中Pb和Cd的含量.结果表明:第一测定现场Pb和Cd的含量为第二、三测定现场的4倍左右,通过对垃圾填埋场附近不同地方的重金属Pb和Cd的含量测定并分析垃圾渗滤液中Pb和Cd的来源,确定土壤对重金属Pb和Cd的吸附作用.     

国内农用地适宜性评价研究综述

农用地适宜性评价是土地利用规划的重要环节.目前,国内对农用地适宜性评价进行了广泛而深入的研究,评价范围区域性特征明显、评价指标综合化与多样化;农用地适宜性评价技术方法不断更新,模型化趋势明显;GIS技术与数学方法、模型结合,保证了农用地适宜性评价的准确性、科学性.随着景观生态学理论的引入,农用地生态适宜性评价将进一步得到重视,研究理论与方法的更新是关键点.     

高校学科交叉的探索与实践 ——以武汉理工大学公共安全与应急管理学科为例

武汉理工大学公共安全与应急管理学科以问题为导向,坚持服务需求、特色发展和深度融合的发展思路,通过搭建“由虚到实”的发展支撑平台、建立“学科特区”人才汇聚制度、构建内外结合的科研协同创新机制、实行团队式研究生培养和建立完善的制度体系等发展路径,形成了具有典型示范意义的学科交叉建设模式。该学科发展实践表明,坚持服务需求是实施学科交叉的根本方向,秉承特色发展是实施学科交叉的价值取向,选择适切载体是实施学科交叉的关键支撑,创新体制机制是实施学科交叉的基本保障。