确保引滦枢纽工程综合效益充分发挥工作初探

水利枢纽工程综合效益的充分发挥是水利工程管理工作中的重点,事关大局,事关民生,事关受水地区广大人民群众的根本利益。笔者在总结引滦枢纽工程综合效益所取得成效的基础上,提出了当前影响该工程综合效益发挥的瓶颈问题,并就如何解决好这一问题提出了工作建议。     

用于牛粪固液分离的变导程螺杆挤压脱水机的结构设计

通过对变导程螺杆挤压脱水机在畜牧养殖农场的实验表明,本文设计和制造的变导程螺杆挤压脱水机能够对牛粪进行合适的分离,而且分离出的牛粪干燥物干燥度合适,分离出的液体中的固体悬浮物少。因此,本文对用于牛粪固液分离的变导程螺杆挤压脱水机的总体设计的研究有一定的实用价值。     

煤矿岩巷中深孔爆破技术的研究与应用

为了提高煤矿岩巷掘进工作面爆破作业工效,采用了中深孔钻眼爆破技术,结果表明：按选定的炮眼布置方式和装药结构及参数,循环进尺明显提高了,材料消耗降低了,结论：中深孔爆破技术适合在煤矿岩巷炮掘工作面推广应用。     

生态挡土墙的特点及适用范围探析

在生态环保、节能降耗日渐成为趋势的新时期,各类生态挡土墙都得到不同程度的应用。文章指出了普通生态挡土墙的生态特点及适用范围,重点分析了后垂型砌块挡土墙和溢水孔砌块挡土墙这类砌块加筋土挡土墙的生态特点和技术特征。     

动量和反转投资策略在我国股市中的实证分析

本文采用沪深两市1995年前上市的股票作为样本,发现我国股市中也存在明显的动量和反转盈利,且两种效应的强弱与大盘走势相关,当市场为牛市特征时,动量效应明显强于反转效应;当市场为熊市特征时,则反之.经典的CAPM模型无法解释动量和反转盈利的来源,检验表明投资者对不同类型信息的不同反应方式,可以很好解释我国股市中的动量和反转盈利,利用上述检验结果还可以解释我国股市中许多有趣的特征.     

Is regulatory adoption ceremonial? Evidence from lead director appointments

Research Summary: Regulatory bodies often wrestle with the thorny question of whether to mandate a governance practice or allow for organic adoption. While mandates afford rapid diffusion, we theorize that they also result in ceremonial adoptions. Leveraging a quasi‐natural experiment, we compare adoption outcomes for a governance practice—lead director adoption—that was mandated by the NYSE but not the NASDAQ. We find that NYSE firms are more likely than NASDAQ firms to have installed a lead director as a symbolic management tactic, so their lead directors are less effectual. We also find that transient institutional investors are deceived by this symbolic management, but dedicated institutional investors are not. Managerial Summary: Shareholders and analysts often desire to see companies introduce strict governance measures, such as proxy access and independent boards. Consequently, regulatory bodies often wrestle with the thorny issue of whether and when to mandate such practices for all companies. What they might not realize is that mandates may not work as well as they seem. Although more companies adopt reform under a mandate, they do so merely as a symbolic gesture. We look at one governance reform—appointing a lead director—finding that companies who introduce this reform as a result of a mandate appoint someone that is relatively toothless. We also find, though, that savvy investors are not actually fooled by this tactic and will trade out of firms that attempt such symbolic management.     

浅析任务引领教学方法中任务的设计

在职业院校的课程教学方法改革中,任务引领式教学法是较好实现工学结合的一种方法,绝大部分教师都想应用这种方法进行教学,培养更多满足社会需求的高素质技能型人才,但在如何设计教学任务、教学任务的类型有哪些、教学任务从何处来等问题,不少教师心中无底。     

案例引领,任务驱动在机械CAD/CAM教学中的应用

如何才能更好的提高教学效果,是我们每个老师都需要面对的问题。在中职数控专业机械CAD/CAM中采用案例引领,任务驱动,提高了学生的学习兴趣,增强了学生的学习信心,培养了学生的创新能力、自学能力、合作能力。     

标准加入法测定酱腌菜中铅的探讨

采用标准加入法消除酱腌菜中食盐的干扰,建立标准加入法测定酱腌菜中痕量铅的方法,该方法2、4μg/ml添加水平回收率为96.5%～99.0%,方法简单,准确度、精密度高,快速方便,符合标准分析要求。     

复杂地质情况下人工挖孔桩的施工

文章通过广西目前在建3个实际工程的施工总结,介绍在各类复杂地质情况下人工挖孔桩的应用,并对人工挖孔桩的施工工艺、安全事故的预防和质量控制的要点作了详细阐述,建议推广这个施工简单、经济适用的基础形式。