发光层厚度对红光磷光聚芴电致发光性能的影响

文章采用喹啉氮杂环类锒配合物[（PPQ）2Ir（acac）]为客体,以聚芴和2-（4-二苯基）-5-（4-叔丁基苯基）-1,3,4-噁二唑（PBD）为主体,研究了不同发光层厚度对有机电致发光器件性能的影响．随着发光层厚度的增加,相同电压下器件的电流密度和发光亮度逐步减小,表现出明显的电荷捕获机制．当厚度达到70nm时,得到了发光亮度为1792cd／m^2,发光效率为6．16cd／A的高性能红光器件．     

3ds MAX中Matte/Shadow材质的应用

介绍3ds MAx中Matte／shadow材质的功能,针对3ds MAx创作中场景与背景图片融合的实际需要,提出利用Matte／Shadow材质实现场景与背景完美融合的有效方法。     

浅谈新时期大学生社会实践活动存在的问题

大学生“三下乡”社会实践活动已经全面展开,内容丰富,形式多样。广大学生应积极地投入到服务于社会主义新农村与和谐社会的建设中去。但新时期社会主义新农村建设的过程中出现了一些问题,需要引起高度重视并给予解决。     

How silicon fertilizer improves nitrogen and phosphorus nutrient availability in paddy soil?

In order to reveal the mechanism of silicon(Si) fertilizer in improving nitrogen(N) and phosphorus(P) nutrient availability in paddy soil, we designed a series of soil culture experiments by combining application of varying Si fertilizer concentrations with fixed N and P fertilizer concentrations. Following the recommendations of fertilizer manufacturers and local farmers, we applied Si in concentrations of 0, 5.2, 10.4, 15.6, and 20.8 μg/kg. At each concentration of added Si, the availability of soil N and P nutrients, soil microbial activity, numbers of ammonia-oxidizing bacteria and P-decomposing bacteria which means that the organic P is decomposed into inorganic nutrients which can be absorbed and utilized by plants, and urease and phosphatase activity first increased, and then decreased, as Si was added to the soil. These indicators reached their highest levels with a Si application rate of 15.6 μg/kg, showing values respectively 19.78%, 105.09%, 8.34%, 73.12%, 130.36%, 28.12%,and 20.15% higher than those of the controls. Appropriate Si application(10.4 to 15.6 μg/kg) could significantly increase the richness of the soil microbial community involved in cycling of N and P nutrients in the soil. When the Si application rate was15.6 μg/kg, parameters for characterizing microbial abundance such as sequence numbers, operational taxonomic unit(OTU)number, and correlation indices of microbial community richness such as Chao1 index, the adaptive coherence estimator(ACE)index, Shannon index, and Simpson index all reached maximum values, with amounts increased by 14.46%, 10.01%, 23.80%,30.54%, 0.18%, and 2.64%, respectively, compared with the control group. There is also a good correlation between N and P mineralization and addition of Si fertilizer. The correlation coefficients between the ratio of available P/total P(AP/TP) and the number of ammonia-oxidizing bacteria, AP/TP and acid phosphatase activity(AcPA), AP/TP and the Shannon index, the ratio of available N/total amount of N(AN/TN) and the number of ammoniated bacteria, and AN/TN and AcPA were 0.9290, 0.9508,0.9202, 0.9140, and 0.9366, respectively. In summary, these results revealed that enhancement of soil microbial community structure diversity and soil microbial activity by appropriate application of Si is the key ecological mechanism by which application of Si fertilizer improves N and P nutrient availability.     

高职公共基础课“课程思政”建设实践模式探究

“课程思政”建设与实施,是新时代高校贯彻落实习近平总书记教育思想的生动实践。它缘起于2016年12月在北京召开的全国高校思想政治工作会议,衍生于上海大学为代表的高校课程思政试点改革探索,推广于教育部的“课程思政”建设的专项方案,深化于持续不断的学习和践行习近平总书记关于教育的论述中,已形成不少专业课探索性成果。尽快破解占高职院校总课时近三分之一的公共基础课,“课程思政”建设难题,是补齐当下高职院校“课程思政”建设短板,助推大思政协同教育的质量和高职院校双高建设的关键所在。     

小学语文学科探究性学习活动的设计

以新的<课程标准>为设计的纲领,根据学生身心发展和语文学习的特点,联系课本,有目的、有步骤地在实践中掌握运用语文的规律.小学语文学科探究性学习活动的设计应关注小学生的个性差异和不同的学习需要,爱护学生的求知欲、求异思维,充分激发学生的主动意识和进取精神,倡导自主、合作、探究的学习方式.     

上海社区教育管理的演变与完善

上海社区教育管理大致经历了学校教育主导、社区社会工作主导和整合共治三个阶段,而当前正面临从分割转向整合、从无序转向有序的变革期.本文认为,要完善社区教育管理,需要各级党委、政府、办学机构、中介组织共同努力.     

色谱法在药物分析中的应用

文中简要阐述了色谱法的起源和原理,并介绍了气相色谱法、液相色谱法包括高效液相色谱法、离子色谱法以及反相高效液相色谱法在药物分析领域的应用研究．     

试论邓小平的制度思想及其实践意义

制度思想是邓小平理论的重要组成部分。邓小平关于制度问题的阐述不仅为改革开放提供了重要的理论支撑,保证了建设中国特色社会主义的理论思考和目标设计落到实处,而且为建立落实科学发展观的制度体系,实现把科学发展观切实落到实处的目标提供了有益的借鉴。