首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 140 毫秒
1.
利用低温等离子体技术对聚苯硫醚非织毡表面进行了改性处理。研究结果表明:低温等离子表面处理显著提高了聚苯硫醚非织毡的吸碱率和吸碱速率,等离子体两极板距离、放电功率、处理时间等对聚苯硫醚非织毡的吸碱性能有很大的影响,合理的等离子体工作参数为极板间距1.5cm,等离子体处理功率50W,等离子体处理时间120s。  相似文献   

2.
科学研究发现,经过特殊改造之后,塑料能像金属一样具有导电性。例如聚乙炔、聚苯硫醚、聚毗咯、聚噻吩、聚噻唑等.目前,已制成一批导电性与银、铜相当的聚合物。被称为有机金属或合成金属.与金属相比,塑料的特点是容易加工。重量轻.  相似文献   

3.
将科研实验"聚苯硫醚纤维的载体染色性能"转化为纺织工程专业的本科综合教学实验。在分散染料染浴中加入苯甲酸苄酯做载体,染料能够在较低的染色温度、较短的染色时间内上染纤维,改善聚苯硫醚纤维的染色性能。通过该综合教学实验,一方面学生可熟悉特种纤维载体染色的方法,掌握傅立叶红外光谱仪、紫外可见分光光度计、差示扫描量热仪、热重分析仪、日晒气候色牢度仪等精密仪器的结构、工作原理、制样及操作,从而提高本科生的实验操作技能及动手实践能力;另一方面,综合教学实验的学习体验有利于培养并提高学生的科研思维和创新意识,激发其科研热情,为其未来的进一步深造和就业打下基础。  相似文献   

4.
本文从农村中小学现代远程教育工程资源应用的现状出发,引入实用主义的新视角,着重分析了实用主义对现代远程教育资源应用的启示,即关注资源应用情境、强调对资源应用进行有效性分析,最后对农村中小学现代远程教育资源的有效应用提出了相应的策略建议。  相似文献   

5.
化学多媒体CAI的应用评价及前景展望   总被引:8,自引:0,他引:8  
胡霞 《化学教学》2002,(12):24-25,23
多媒体CAI在中学化学中得到了广泛的应用,同时在应用的同时也存在着一定的误区,本文重点分析了它的应用现状,并对其进行了评价,对未来的发展进行了展望。  相似文献   

6.
描述了运动图像专家组MPEG所推出的一系列标准,并对标准的内容进行了比较,对各标准的实际应用作了分析,澄清了视频数字化应用中的模糊概念,从而为视频信号的压缩应用提供了明确的选择。  相似文献   

7.
文章对社会心理学理论与应用的关系进行了分析与评述。文章认为社会心理学既是一门基础学科,又是一门应用学科,理论研究与应用研究不应割裂开来加以看待,二者是互为补充,相辅相成的,理论是应用的基础,而应用是理论的推广和延伸。此外,文章还对社会心理学在现代管理领域中的应用情况,进行了追溯、分析与评价。  相似文献   

8.
超声的应用及展望   总被引:7,自引:0,他引:7  
本文对超声的一般概念及其发展,超声在应用听 特点及其实际应用作了介绍,对超声应用的发展进行了展望。  相似文献   

9.
本文对臭氧的性质,制备及应用进行了阐述,并对其应用前景进行了展望。  相似文献   

10.
本文讨论了wiki的含义及特点,对wiki技术已有的应用进行了总结归类,结合一些具体案例,阐述了对教育教学应用的启示。  相似文献   

11.
为了提高高校实验设备的综合利用率,给出了一种基于可编程电源的光伏电池阵列模拟系统实现方法。采用上位PC机计算太阳能电池阵列的伏安特性曲线,并通过串行通信控制可编程电源,使其输出电压和电流跟踪该伏安特性曲线,从而用可编程电源实现了光伏电池阵列模拟器的功能。根据光伏电池等效电路模型,导出了基于光伏电池阵列开路电压、短路电流、最大功率点对应电压和电流等参数的光伏电池伏安特性解析表达式。实验验证了该模拟系统的可行性和有效性。  相似文献   

12.
Over the past two years, Florida State University's Science Education Program and Sabal Palm Elementary have collaborated to develop a PPS. The formation of the Sabal Palm PPS was not based upon a predetermined design nor has one group served as an authority to direct how the PPS ought to operate. The success of this model relies on PPS participants working collaboratively to establish goals and plans for actions to be taken to support teacher-learning. The Sabal Palm PPS continues to evolve as dynamic model for creating a center for teacher and student learning. The purpose of this paper is to discuss our involvement in the formation a PPS and implications for enhancing teacher education programs. Specializations: professional practice school development, teacher research, primary science education Specializations: environmental science, primary science education.  相似文献   

13.
The purpose of this study was to analyze the introduction of the performance-based pay system (PPS) in Korean national universities through the perspective of institutional isomorphism. Using three isomorphism concepts of coercive, mimetic, and normative, and further framing the PPS within the overarching theoretical frameworks of governmentality, neoliberalism, myth, and policy convergence, this study explored the historical and social background of the PPS, the reason the Korean government pursued the PPS form used in the US higher education, and the main factors that affected its introduction in Korean national universities. The result of this analysis shows that while the institutionalization of the PPS in Korean national universities seemed closely associated with the radical political, economic change in Korean society, it was in fact an exemplar of isomorphism from the US model of public and private higher education. This isomorphic activity functioned simultaneously as a norm, social order, and myth within Korean higher education while faculty displayed an anti-isomorphic tendency against the power of the institutional isomorphism of PPS in national universities.  相似文献   

14.
主动性人格指个体采取主动行为影响周围环境的一种稳定倾向。主动性人格的测量工具有完整版与简缩版。在简缩版上有文化及被试群体的差异。作为一种独特的人格特质,主动性人格对个体具有积极的心理功能,能提升人的工作绩效,促进职业适应与职业生涯发展。主动性人格与工作绩效、职业生涯的关系成为当前研究的主题。未来研究应该进一步清晰主动性人格的结构,重视青少年主动性人格与学习的关系、主动性人格的发展与教育的研究。  相似文献   

15.
The No Child Left Behind (NCLB) legislation has created pressure for districts to improve their students’ proficiency levels on state tests. Districts that fail to meet their academic targets for 3 years must use their Title I funds to pay for supplemental education services (SES) that provide tutoring or other academic instruction. Many districts, including the Pittsburgh Public Schools (PPS), have also adopted additional tutoring programs designed to help students reach proficiency goals. This paper examines student participation and achievement in two PPS tutoring programs—the NCLB-mandated SES program and a state-developed tutoring program. We examine the characteristics of students participating in each program, the effects of participation on student achievement, and the program features that are associated with improved achievement.  相似文献   

16.
Procrastination has been defined in different ways. Two instruments—the Irrational Procrastination Scale (IPS) and the Pure Procrastination Scale (PPS)—focus on a core problem in procrastination—the irrational delay of intended behavior. The present paper examined the psychometric properties of the Norwegian translations of these scales. In five samples with students as well as non-students (aggregated n?=?1045), standard psychometric properties of the instruments were assessed and their factor structures were compared in replication analyses. In addition, correlations between the instruments as well as other instruments (i.e., the Susceptibility to Temptation Scale and the Satisfaction with Life Scale) were examined to determine convergent and divergent validity. Overall, the results indicated that both IPS and PPS are suitable for use as measures of procrastination.  相似文献   

17.
自杀意念者何以抑郁——沉浸性反应类型的中介效应   总被引:2,自引:1,他引:1  
目的:基于概念分析和已有研究,本研究提出理论假设,即沉浸性的反应类型是解释自杀意念与抑郁关系之间的认知中介因素。方法:使用自杀意念量表(SSI)、流调中心用抑郁量表(cES—D)、简版沉浸量表(BRRS)、分心量表(Ds)和问题解决量表(PSS)在645名大学生中施测,运用中介效应的验证理论假设。结果:中介检验的各路径系数显著,沉浸变量在自杀意念与抑郁的关系中具有完全中介作用。两个与沉浸性质相反的变量:问题解决和分心在自杀意念与抑郁的关系中分别具有完全中介或者部分中介作用。结论:结果验证了研究假设,即自杀意念影响抑郁的发生和维持,是由于沉浸这种反应类型作用的结果。  相似文献   

18.
ABSTRACT

Short-term mobility has been neglected in the higher education mobilities literature, which tends to focus on longer stays such as study abroad or entire degrees. Short-term doctoral mobility schemes are relatively low-cost, potentially high-value investments in the development of early career researchers. Doctoral mobilities research – and the field of academic mobilities research more broadly – is characterised by a positivist, often atheoretical orientation; this article responds to this by introducing a critical academic mobilities approach (CAMA). This approach is rooted in the ‘mobilities paradigm’, and involves (i) questioning the status of mobility as a universal good; (ii) exploring the subjectivity of mobile subjects as dynamic and shifting, but also structurally determined; (iii) a commitment to researching mobility processes as well as investments and outcomes. The article explores ‘autoethno-case studies’ of two doctoral mobility schemes funded by the UK Economic and Social Research Council (ESRC): Overseas Institutional Visits (OIV) and the PhD Partnering Scheme (PPS).  相似文献   

19.
对一般应用系统的结构和Web应用系统结构进行了讨论和比较,并对COM技术在Web应用系统设计中的运用和特点进行了分析,这有助于开发基于COM的应用系统.  相似文献   

20.
随着教育信息化建设工作的不断推进和应用成果的不断积累,我国教育信息化发展逐步从重视学校数字教育资源配置转为重视其在教育教学中的深度应用、融合创新。文章从应用场景、应用主体和应用工具三个层面构建我国基础教育信息化应用模型并选取信息化应用核心指标,采用综合指数计算全国各省基础教育信息化应用指数,同时对东、中、西部地区教育信息化应用发展差异进行测算和分析。研究结果表明,我国中小学校信息化应用省际和区域差异明显,基础教育信息化应用整体发展不均衡。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号