禄丰县农村饮用水安全调查

通过对禄丰县17乡56个农村饮用水集中供水水质监测、农村饮用水现状调查及饮用水不安全因素分析,提出今后一个时期禄丰县解决农村饮水安全问题的行动计划,保护禄丰县农民在生产、生活与健康等方面不受水环境污染和破坏等影响,为社会、经济、环境的可持续发展提供必须的基础。     

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%.     

浅谈商务英语专业综合毕业实训项目设计

本文从商务英语专业的学科特点和培养目标出发,阐述了综合性实训项目对商务英语专业的必要性,介绍综合毕业实训方案设计框架,并分析了决定项目有效性的重要因素和薄弱环节,旨在为设计科学有效的综合实训项目、实现专业与岗位"无缝对接"做出有益的探索和尝试。     

“动车组”教学模式在《心理学》课程中的探索与实践

在远程开放教育中,《心理学》是一门理论性和实践性兼具的课程,对于成人学生科学地了解心理健康知识,掌握必要的心理调适方法及技巧,以健康的心态生活、工作、学习有着应用性作用。在阐述"动车组"教学模式的含义和教学实践意义的基础上,摸索和探讨了"动车组"教学模式,即以优秀教学资源为教学轨道,以课程实践、专业实践、小组学习、网络平台学习为每节动车车厢,以学员的自主学习为动力源。分析了该教学模式应用于《心理学》课程教学中的应用效果。     

后危机时代江苏外贸面临的形势和战略调整

后金融危机时期江苏外贸面临着国际需求持续萎缩、贸易摩擦频发、人民币升值、出口成本上升等经济形势,同时江苏外贸自身发展也存在着外贸依存度高、区域外贸发展不平衡、加工贸易发展缺乏动力等问题。针对后危机时代江苏外贸面临的严峻形势和自身存在的问题,文章提出了积极应对挑战,促进江苏外贸发展的相关对策建议。     

浅谈案例教学引入世界广播电视事业史课程的方法及意义

案例教学法虽在新闻传播学领域起步较晚,但已经在新闻评论等课程教学中收到了良好的效果。《世界广播电视事业史》作为广播电视新闻学专业的必修课,涉及到不同国家不同体制的多个广电传媒公司、集团的发展史,内容庞杂。引入案例法教学在进行知识梳理的同时,还可以激发学生课前准备、课中讨论、课下继续查阅资料继续学习的积极性。     

互联网时代科技创新人才终身学习现状及发展建议

加强对科技创新人才的培养是我国实现人才强国战略的重要任务之一,终身学习是科技创新人才成长的重要路径.采用问卷调查法,辅以访谈法,探究北京中关村科技园区科技创新人才的终身学习现状发现,科技创新人才具有提升职业能力的学习动机,偏爱混合式学习方式,善于通过在线社群联通知识,在线资源付费意愿强烈,体现了科技创新人才身份符号下的成长需求、技术影响下的学习转变以及知识价值下的理性消费.针对研究结果,从政府、企业及个人角度提出了针对科技创新人才终身学习的发展建议.     

梦醒女性的执着探索 --论庐隐自叙传小说创作

庐隐是"五四"时代的产儿.她的小说创作,在中国现代文学初期的文坛上产生过不可磨灭的巨大影响.特别是自叙传小说,更是显示了庐隐小说创作的成熟.这些小说通过女主人公的婚恋遭遇揭示了女性"争做真正的人"的可贵与艰难,展示女性觉醒后无路可走的迷惘和悲哀,探索觉醒的女性出路、人生意义和生命哲理.     

略论邓小平的科教兴国思想

科教兴国战略是党中央、国务院根据邓小平关于科学技术是第一生产力和把教育摆在优先发展战略地位的思想 ,结合当今世界各国科技、教育的发展及中国国情提出的发展战略。本文从邓小平科教兴国思想的形成与发展、主要内容以及邓小平对马克思、毛泽东科教思想的发展与贡献等方面来研究邓小平的科教兴国思想