中国传统文化与教育

中国的传统文化对我国的大、中、小学教育有着深刻的影响。优秀的传统文化对教育的积极影响是可以肯定的。同时对传统文化的继承也应有所选择。     

用板式电位差计测干电池内阻

就板式电位差计测量干电池电动势和内阻的实验设计及精确测量给出了一个解决方案.在用电位差计测干电池的内阻时,关键在于变换电阻的取值,其取值与电流的标准化有关.     

1,3-磷锗丙二烯及其相关分子的量子化学计算研究

用量子化学从头计算(HF)和密度泛函理论(DFT)对1,3-磷锗丙二烯及其相关分子进行了研究.在6-311 G(d,p)和6-311 G(3df,2p)基组水平优化上计算了各标题物的平衡几何构型.结果表明:1,3-磷锗丙二烯及1,2,3-磷硅锗丙二烯为弯曲几何构型,负离子也为弯曲几何构型.另外,在B3LYP/6-311 G(d,p)水平上计算了各标题物的旋转势垒,定性估算了各标题物分子中Ge=C、Ge=Si、C＝P、Si＝P和Ge=P等双键的相对强度.     

底部三层框架-抗震墙砖房抗震性能及抗震设计的探讨

综合国内底部一层框架—抗震墙砖房和底部两层框架—抗震墙砖房一些试验研究和通过几个算例探讨了底部三层框架—抗震墙结构的抗震性能,并结合工程实践中对底部一层框架—抗震墙砖房和底部两层框架—抗震墙砖房抗震设计中应注意的问题对这种结构的抗震设计给出提示。     

Superresolution measurement on the minute fluctuation of cell membrane

A wide variety of the physical properties of cell membrane reflect life-cycle processes, including me- tabolism, respiration, photosynthesis, signal transduc- tion, transmembrane transport, and so on. So it is sig- nificant to investigate the elastic prop…     

Seasonal variation of snow microbial community structure in the East Rongbuk glacier, Mt. Everest

Mt. Everest, the zenith of the world, plays an impor- tant role in the global climate change. During the lastdecade, some studies on glacier and snow have been undertaken in this region. The climate and environment changes in the past hundred years have b…     

Genetic analysis and molecular mapping of a presenescing leaf gene psll in rice （Oryza sativa L.）

A rice psl1 （presenescing leaf） mutant was obtained from a japonica variety Zhonghua 11 via radiation of ^60Co-γ in M2 generation. Every leaf of the mutant began to wither after it reached the biggest length, while the leaves of the wild variety could keep green for 25--35 d. In this study, genetic analysis and gene mapping were carried out for the mutant identified. The SSR marker analysis showed that the mutant was controlled by a single recessive gene （psl1） located on chromosome 2. Fine mapping of the psl1 locus was conducted with 34 new STS markers developed around psl1 anchored region based on the sequence diversity between Nipponbare and 93-11. The psl1 was further mapped between two STS markers, STS2-19 and STS2-26, with genetic distances of 0.43 and 0.11 cM, respectively, while cosegregated with STS2-25. A BAC contig was found to span the psl1 locus, the region being delimited to 48 kb. This result was very useful for cloning of the psl1 gene.     

基于串行消息传递机制的LDPC码译码算法研究

在介绍LDPC码概念和基于洪水消息传递机制和积译码算法的基础上,引入基于串行消息传递机制的LDPC译码算法.该串行译码算法可基于校验节点或变量节点一定的顺序进行消息处理和传递,保证更新的消息能够快速进入迭代过程,从而改善消息传递的收敛特性;同时充分利用消息间相互关联的特点,融合消息传递步骤,可以降低所需的存储容量.分析了两种串行译码算法的算法复杂度,证明基于校验节点的串行译码算法能在很大程度上简化译码复杂度,并对比洪水译码算法,在AWGN信道下进行了性能仿真,仿真结果表明两种串行译码算法都使译码性能得到明显提高.     

Department of Environmental Hygiene; The Third Military Medical University

使用GC-MS对三峡地区重庆段河流中的多环芳烃污染进行了分析研究.共检出萘、苊、二氢苊、芴、菲、蒽、萤蒽、芘共8种多环芳烃,其浓度均在0.7μg/L以下,推测其主要来源于燃料燃烧.其中检出率高是菲、芘、萤蒽3种多环芳烃,它们在每个水取样均有检出,应该予以关注.     

棕背伯劳的育雏行为

2005年4-6月,对四川南充市市郊的3个样地,共11个棕背伯劳巢的育雏行为进行了观察,重点观察其中4个巢,其它巢为补充观察.结果显示:育雏期15±1d,育雏期亲鸟的喂食模式有a,b,c3种,育雏前期,中期,后期,分别以模式c,模式b,模式a所占比重最大.雌鸟在3个育雏时期的暖雏高峰主要出现在8∶00-9∶00时和16∶00-17∶00时.喂食高峰在育雏前期和育雏中期都出现在10∶00-12∶00时和14∶00-16∶00时,育雏后期出现在12∶00-14∶00时和16∶00-18∶00时