不同剂型硝苯地平治疗高血压的药物经济学评价

目的评价抗高血压药硝苯地平临床常用三种不同剂型治疗高血压的临床效果和经济效益。方法选择90例高血压病患者随机分为三组,每组30例,分别口服硝苯地平普通片、缓释片和控释片治疗,并进行药物经济学分析。结果服药8周后各组患者血压均有明显下降,其中普通片、缓释片和控释片治疗高血压总有效率分别为93.33%、93.33%、96.66%,不良反应发生率分别为10.0%、6.6%、0.0%,成本-效果比分别为0.02、0.40、2.96,控释片相对于普通片的增量成本-效果比为85.43。结论硝苯地平缓释片虽其消费成本不是最低,但服法简单,副作用较少,综合评价是硝苯地平临床常用三种剂型治疗高血压的最佳剂型,特别适用于基层医院。     

Does Twitter chatter matter? Online reviews and box office revenues

ABSTRACT

With a rapid rise of text-based social media and online Word-of-Mouth (WOM) activity, millions of people express their thoughts and opinions on a variety of topics. Considering that nowadays WOM is a most influential source of information when guiding consumers’ choice and purchase decisions, in this paper we look at the relationship between Twitter messages (tweets) and cinema box office revenues. Using static and dynamic panel data regression approaches, we show that the frequency, sentiment and timing of tweets posted about a film are correlated to different extent with the movie’s box office revenues, with negative tweets being particularly damaging to the box office revenues. From a managerial perspective, this is important to know, such that film production companies and distributors can adjust their strategy accordingly.     

职业经理人、组织地位赋予与企业创新——来自家族企业的经验证据

职业经理人与家族企业有效融合是促进企业创新的先决条件。聚焦家族企业赋予职业经理人组织地位这一融合途径,探究家族企业赋予职业经理人组织地位对企业创新的影响。结果表明,家族企业赋予职业经理人组织地位能够促进企业创新;相较于约束型社会情感财富,延伸型社会情感财富对职业经理人组织地位赋予与企业创新关系具有更显著的促进作用。异质性分析发现,处于经理人市场发达地区、从属高技术行业以及信息透明度较高的企业,职业经理人组织地位赋予对企业创新的促进作用更显著。进一步研究发现,职业经理人的企业家精神在职业经理人组织地位赋予与企业创新关系中发挥中介作用。研究结论可为理解家族企业如何与职业经理人有效融合,进而促进创新提供新的经验证据。     

推进机构改革转变政府职能加快铁路政企分开步伐

结合政府机构改革和铁路工作实际,文章分析了政企分开的重要意义,指出政企分开是政府机构改革的核心内容,是铁路管理体制的重大改革,阐述铁道部如何在这一原则指导下推进机关机构改革,转变机关职能。     

利益机制视角下社区发展与农民权益保护制度构想

农民利益问题是“三农”问题的核心,农村社区发展是保护农民权益的基础和前提,目前,在利益保护方面,农民处于困难和不利的弱势地位,使得新农村社区发展受阻。在和谐社会的思想内蕴与精神旨趣统筹下,以法学分析为基础,围绕利益和利益机制对新农村社区建设中农民权益保护问题进行探讨,完善根本的法律制度体系,进一步深化对农民权利保护的全新理念,大力促进社区发展,以期为保护农民权益及构建和谐社会主义新农村提供有效思索。     

LearnSmart,adaptive teaching,and student learning effectiveness: An empirical investigation

Facing the growing number of digital natives entering the classroom, business professors look for innovative ways to enhance the student learning experience. The authors focus on the online interactive learning tool LearnSmart (McGraw-Hill, New York, NY), and examine its impact on student learning effectiveness by testing the direct and indirect relationships among perceived competence, perceived challenge, instructors, perceived value, and satisfaction with LearnSmart. Constructionism served as the theoretical foundation for this study. About 215 students at a public university in the United States took the survey and 197 valid responses were received. Regression analysis results showed that the use of LearnSmart improved students' perceived competency, thus increasing their perceived value of using LearnSmart, as well as their satisfaction with LearnSmart. Perceived value was also found to mediate the impact of perceived competency on satisfaction with LearnSmart, and the instructor played a significant role in facilitating and improving student learning. Perceived challenge impacted student's perceived value of using LearnSmart, but it did not influence satisfaction with LearnSmart.     

菊芋中菊糖提取方法的比较研究

本试验采用热水浸提法、果胶酶法和微波法从菊芋中提取菊糖,探讨了最佳提取工艺条件。结果表明:在其他条件保持不变的情况下,微波法提取率最高,热水浸提法次之,果胶酶法提取率最低。     

玉米播种机变量施肥控制系统设计

针对目前我国盲目粗放施肥、化肥施用量大、生态环境污染严重等问题,设计一种玉米播种机变量施肥控制系统。系统由上位机、下位机、机车速度采集装置、无线通信模块和电源等组成。上位机开发播种机施肥作业智能管理系统,可完成施肥作业参数的设置、作业数据的显示、存储和查询,并向下位机控制器发送指令和接收地轮测速装置信息。下位机以单片机为控制核心,设计闭环控制系统,通过安装在排肥器上的编码器,将采集到的数据信号通过无线通信模块传给上位机。系统采用外槽轮式排肥器作为排肥机构,下位机控制器主要通过控制排肥电机的转速进行肥料的调整。     

冲泡条件对辣木茶中稀土浸出率的影响研究

本文采用ICP-MS方法测定辣木茶的稀土总量,以及不同冲泡条件下稀土的浸出率。实验结果表明,辣木茶的稀土浸出率随冲泡时间的延长而升高,且增长逐渐趋于平缓。此外,随冲泡次数的增加,样品的稀土浸出率基本上呈减小趋势。五次冲泡后辣木茶中稀土的累计浸出率为18.15%。虽然原茶中稀土含量较高,但由于稀土氧化物主要残留于茶渣中,总体上处于比较低的暴露水平,对饮茶人群的健康影响较低。     

基于电子舌传感技术评价不同市售啤酒滋味品质

应用电子舌传感技术和多元统计学方法相结合的手段,本研究对市售6个啤酒品牌下15个样品的滋味品质特征进行综合评价分析。结果表明,评价啤酒品质的8种滋味指标可以划分为三大类,其中第一主成分由酸味、鲜味和鲜味的回味组成;第二主成分由苦味和苦味的回味组成;第三主成分由咸味、涩味和涩味的回味构成。因子分析发现综合得分排名前三的啤酒样品分别为C_1、F_1和E_1。与此同时,通过聚类分析可以将15个不同品牌与类型的啤酒样品按照滋味品质的差异情况分为5类,与现有啤酒市场行情相符。研究说明电子舌传感技术在啤酒品牌区分、品质口感判定和市场分析中具有巨大的应用潜力。