高校与中学的思想政治教育衔接问题研究

高校与中学在思想政治教育的衔接过程中存在着一些认知偏差、结构颠倒的问题,导致两个阶段的思想政治教育不能无缝对接,以及教育对象在思想上的混乱。梳理分析高校和中学思想政治教育的衔接问题,意在提高思想政治教育的有效性,优化思想政治教育的结构,更好地实现思想政治教育的目标。     

Vapor-liquid equilibrium simulation of binary and ternary mixtures of CH4, C2H4 and iso-C4H10

The vapor-liquid equilibrium（VLE） properties for the binary and ternary mixtures of CH4,C2H4 and isoC4H10 are of great importance in the recovery of ethylene from mixture containing CH4 and C2H4 with iso-C4H10 as solvent.Hence,Gibbs ensemble Monte Carlo（GEMC） simulations were used to estimate vapor-liquid equilibrium for the binary and ternary mixtures of CH4,C2H4 and iso-C4H10 with the united atom potential NERD model.The selected simulation conditions are based on the experiment in the literature.The results of this work were shown to be in satisfactory agreement with available experimental data and predictions of Peng-Robinson equation of state.The structure of simulated liquid phase is also characterized by radial distribution function（RDF）,which contributes to further understanding of the VLE curve of these systems.RDF is not sensitive to the pressure and temperature range.With the increase of pressure or the decrease of temperature,the molecules tend to gather together.     

Synthesis of polyketone by copolymerization of styrene and CO using carbon nanotube-complex Pd2+ catalyst

The dipping method was devised to deposit Pd onto carbon nanotube as supported catalyst(Pd/CNT) for the copolymerization of carbon monoxide(CO) and styrene(ST) towards the formation of polyketone(PK).The Pd/CNT was characterized by X-ray photoelectron spectroscopy(XPS),X-ray diffraction(XRD) and high-resolution transmission electron microscopy(HRTEM).The construction and crystallization property of PK were evaluated by Fourier transform infrared spectroscopy(FTIR),13C-nuclear magnetic resonance(NMR) and XRD,respectively.The catalyst showed excellent activity and reusability in promoting the fabrication of PK.It can be recycled 14 times with the highest total catalytic activity of 4 239.64 gPK/(gPd·h) at Pd content of 8.63wt%.The results indicate that the prepared catalyst is effective to catalyze the copolymerization of CO and styrene.     

Is right ventricular mid-septal pacing superior to apical pacing in patients with high degree atrio-ventricular block and moderately depressed left ventricular function?

Objective

We are aimed to investigate whether right ventricular mid-septal pacing (RVMSP) is superior to conventional right ventricular apical pacing (RVAP) in improving clinical functional capacity and left ventricular ejection fraction (LVEF) for patients with high-degree atrio-ventricular block and moderately depressed left ventricle (LV) function.

Methods

Ninety-two patients with high-degree atrio-ventricular block and moderately reduced LVEF (ranging from 35% to 50%) were randomly allocated to RVMSP (n=45) and RVAP (n=47). New York Heart Association (NYHA) functional class, echocardiographic LVEF, and distance during a 6-min walk test (6MWT) were determined at 18 months after pacemaker implantation. Serum levels of N-terminal pro-brain natriuretic peptide (NT-proBNP) were measured using an enzyme-linked immunosorbent assay (ELISA) kit.

Results

Compared with baseline, NYHA functional class remained unchanged at 18 months, distance during 6MWT (485 m vs. 517 m) and LVEF (36.7% vs. 41.8%) were increased, but BNP levels were reduced (2352 pg/ml vs. 710 pg/ml) in the RVMSP group compared with those in the RVAP group, especially in patients with LVEF 35%–40% (for all comparisons, P<0.05). However, clinical function capacity and LV function measurements were not significantly changed in patients with RVAP, despite the pacing measurements being similar in both groups, such as R-wave amplitude and capture threshold.

Conclusions

RVMSP provides a better clinical utility, compared with RVAP, in patients with high-degree atrioventricular block and moderately depressed LV function whose LVEF levels ranged from 35% to 40%.     

多维贫困“行动—结构”分析框架下的生计脆弱——基于武陵山区的实证调查与理论分析

生计资本转换是生计可持续的内在动因,生计资本转换行动嵌入区域交换系统中,受结构因素约束.当农户通过生计资本转换不能应对频繁的生计风险并从生计风险打击中恢复,或者生计资本转换效率长期维持在较低的均衡水平,农户生计便呈现较强脆弱性.在微观层面,生计脆弱是武陵山区贫困的内在致因,体现为生计风险频发、农户生计资本匮乏、农户生计资本转换能力薄弱等内在关联.在宏观层面,区域交换系统“交换层面”分离导致了区域脆弱,抑制生计资本转换.公共产品供给是武陵山区扶贫开发的核心路径,在延续并增强当前基础性与生产性公共产品供给的同时,应通过构建资产社会政策、发展避灾农业、重构乡村社区社会公共性,有针对性地缓解农户生计脆弱.     

表面增强拉曼光谱检测系统在实验教学中的应用

根据表面增强拉曼光谱检测技术在医学研究中的一些研究方法和内容,设计和实践了一组适合本科低年级学生学习的教学实验,探索了科研仪器设备在教学实验中的应用的具体方法。实践表明,该实验有利于培养学生的实践能力、创新能力和科研能力。     

试析《边城》中的人生哲学简

《边城》是沈从文最具代表性的一部力作,也是其对人生探索较为成熟、对湘西世界描绘得最为酣畅淋漓的一部经典之作。本文立足于沈从文对书中人物在时代大风暴下的生存状态、精神状态的关注上,从他们怎样对待生活、对待生命、怎样处理人与人、人与自然的关系等角度展开了论述。     

论司马贞补《史记》意识在《史记索隐》中的体现

司马贞撰写《史记索隐》的初衷是要续补《史记》,但是由于种种原因,这项工程没能完成,进而改为注解,因而《史记索隐》中也常常体现司马贞补《史记》的残留痕迹。古今学者对司马贞及其著作的研究多集中在"三家注"之一的《史记索隐》上,对司马贞的补史工作或是视而不见,或是只作只言片语的讨论。然而,明确司马贞续补《史记》的自觉意识和批判精神在《索隐》中的体现,是我们做好《史记索隐》研究工作必不可少的一环。     

FRP加固锈蚀钢筋混凝土梁的受弯性能分析(英文)

采用Ansys有限元软件对8根不同锈蚀率的FRP片材加固钢筋混凝土梁的受弯性能进行数值分析,研究纵筋锈蚀率对FRP加固梁的裂纹开展、破坏模式、承载能力以及延性和变形能力的影响.研究结果表明:低钢筋锈蚀率的梁发生受压区混凝土压碎破坏;中等锈蚀率的梁钢筋屈服后,钢筋与混凝土界面发生黏结滑移,最后FRP剥离破坏;高锈蚀率的梁钢筋没有达到屈服强度便发生黏结滑移,最后发生受压区混凝土压碎破坏.钢筋锈蚀越严重,FRP加固钢筋混凝土梁的承载力降低得越多.试件RCB-1(锈蚀率为0)的承载力为115 kN,而试件RCB-7(锈蚀率为20%)的承载力仅为42 kN.与FRP加固未锈蚀的钢筋混凝土梁相比,FRP加固锈蚀钢筋混凝土梁的变形能力较高.试件RCB-1和试件RCB-7的最大跨中挠度分别为20 mm和35 mm,而试件RCB-5(锈蚀率为10%)的最大跨中挠度达到了60 mm.     

基于“视听说”的高职英语教学策略

为了解决高职“视听说”英语教学中存在的缺乏学习兴趣、自信和语感等诸多问题,通过对现实情况的分析提出了一些建议,如：兴趣与目的相结合、实施赏识教育、使用恰当的“视听说”实施步骤、因材施教、培养学生语感等,从而激发学生学习英语的积极性,切实改善教学效果.