Mechanism of intercalation and deintercalation of lithium ions in graphene nanosheets

Graphene nanosheets (GNSs) were synthesized by reducing exfoliated graphite oxides. Their structure, surface morphology and lithium storage mechanism were characterized and investigated systematically using X-ray diffraction, atomic force microscopy, scanning electron microscopy, charge-discharge tests, cyclic voltammetry and electrochemical impedance spectroscopy. It was found that the GNSs, which were obtained via chemical synthesis, were primarily less than 10 graphene layers. The GNS electrodes, which were fabricated from the reduced GNSs, exhibited an enhanced reversible lithium storage capacity and good cyclic stability when serving as anodes in lithium-ion batteries. Also, the first-cycle irreversible capacities of the system were relatively high, because of the formation of a solid electrolyte interphase film on the surface of the GNS electrode and the spontaneous stacking of GNSs during the first lithiation. The electrochemical impedance spectroscopy results suggest that the solid electrolyte interphase film on the GNS electrode during first lithiation were primarily formed at potentials between 0.95 and 0.7 V. Also, the symmetry factor of the charge transfer was measured to be 0.446.     

基于加速进化规划的模糊神经网络学习算法

提出了一种训练模糊神经网络的加速进化规划算法。该算法是进化规划算法的一种改进 ,适合于多维高精度的数值优化。经仿真实例验证 ,其收敛速度有了明显的改善 ,且不易陷入局部极小。     

捷联式定位定向数据采集系统的设计与实现

本文介绍了一个用于侦察车定位定向系统中的多通道、高速、实时数据采集系统．系统采用双端口存储技术，实现了数据的高速采集与传输。文中从硬、软件两个方面讨论了实现的方法，并给出了具体的设计．     

细茎大豆（G.gracilis）rbcS基因结构与分子进化分析

从细茎大豆的嫩叶中提取总ＤＮＡ，用ＰＣＲ方法扩增得到包含完整编码区的ｒｂｃＳ基因并将其克隆到ｐＢＬＵＥＳＣＲＩＰＴ载体中。完成全基因１０８９个核苷酸测序后，运用ＰＣＧＥＮＥ进行顺序编辑和同源比较，并应用ＭＥＧＡ１．０２１软件中的Ｎｅｉｇｈｂｏｒ－ｊｏｉｎｉｎｇ方面画出Ｒｕｂｉｓｃｏ小亚基仓的系统进化树。     

对当今世界男子跳远技术特征的研究

通过对雅典第6届世界田径锦标赛男子跳远前8名的技术与成绩的分析，提出了当今世界男子跳远的技术特征与发展趋势．     

提高煤炭质量是山西省煤炭产业的当务之急

近年来，我国煤炭行业已由卖方市场转变为买方市场。各地环保要求日趋严格，新的优质煤生产基地的迅速崛起，对山西煤炭产业提出了严峻的挑战。面对这种形势，提高煤炭质量已成为山西省煤炭产业的当务之急     

封闭曲线的奇异积分相联方程的正则化

文章在奇异积分相联方程和Fredholm方程研究的基础上,旨在通过运用正则化的方法,主要从两方面即κ’≥0,κ’<0对奇异积分相联方程的解进行研究分析,在指标的范围下获得封闭曲线的奇异积分方程可解.     

近红外光谱的原理及应用

分析了近红外光谱分析技术的原理和组成，介绍了近红外光谱分析技术的优越性，对该技术发展历程中出现的几种典型仪器进行了总结，指出近红外光谱分析技术的主要应用，着重论述了该技术在树脂吸附方面的应用．     

3D DNA origami designed with caDNAno

For about three decades, DNA-based nanotechnology has been undergoing development as an assembly method for nanostructured materials. The DNA origami method pioneered by Rothemund paved the way for the formation of 3D structures using DNA self assembly. The origami approach uses a long scaffold strand as the input for the self assembly of a few hundred staple strands into desired shapes. Herein, we present a 3D origami "roller" (75 nm in length) designed using caDNAno software. This has the potential to be used as a template to assemble nanoparticles into different pre-defined shapes. The "roller" was characterized with agarose gel electrophoresis, atomic force microscopy (AFM) and transmission electron microscopy (TEM).     

2例直肠癌综合治疗分析

对６２例直肠癌病人发病症状和综合治疗的近期疗效进行分析。结果：（１）对有大便习惯改变（８２３％）、便血（７１１％）症状的病人应及时行直肠指检及钡双重造影和内窥镜检查，以免误诊、漏诊。（２）术后放疗对降低局部复发率和延长复发时间有明确效果；姑息放疗对缓解病人疼痛、便血症状，改善生存质量有良好效果