室温下测定钻井液用固体加重剂的密度

实验室测定钻井液用固体加重剂如重晶石粉、石灰石粉、超细碳酸钙粉等密度时,大多采用李氏密度瓶法和甘氏密度瓶法.其主要测定原理都是测定一定质量的固体加重剂排开煤油液体的体积数,从而计算出钻井液用固体加重剂的密度.     

Management earnings forecasts and the quality of analysts’ forecasts: The moderating effect of audit committees

This study investigates whether effective audit committees influence the association between management earnings forecasts and the properties of analysts’ forecasts. We posit that this influence on the part of an audit committee would likely result from increased responsibility for monitoring voluntary disclosure. Using the four attributes that the Blue Ribbon Committee (1999) and prior research suggest as being indicative of audit committee effectiveness, we find that analysts’ forecasts exhibit higher accuracy and lower dispersion with the issuance of management forecasts for those firms employing audit committees that are composed exclusively of independent directors, include an accounting expert, and act with due diligence. We also find that effective audit committees strengthen the association between management and analyst forecast accuracy. Our evidence, therefore, supports the notion that effective corporate governance influences the reliability of voluntary disclosure, and thereby benefits the users of financial information.     

能源系统动力学应用研究综述

对系统动力学理论在国内外的发展过程以及其在不同领域的广泛应用进行研究,概括了能源系统动力学的实质是系统动力学理论与SD模型在分析各类能源问题的实证研究与应用,报告了能源系统动力学国内外研究现状,总结了系统动力学在能源领域的应用以及其对环境保护、经济发展、社会进步等方面的贡献,并在此基础上展望了能源系统动力学在大数据时代与数据挖掘及GIS等理论结合研究的方向.     

基于专业质量保障体系的德育为先与创新策略——以高职专业人才培养为例

党的教育方针把德育放在学生全面发展的领先地位,"德育为先"在理论与实践中被证明是正确的。针对传统德育工作存在的淡化僵化等不足,必须重点推行"三个转变",构建"全体性、全程化、全方位"德育为先体系,在坚持高职专业质量"德育为先"原则的同时,更应重视德育思路与方式的创新。     

制度创新与经济增长——一个理论分析框架及实证检验

任何经济增长过程都是在一定的制度环境中进行的，有必要将制度因素纳入经济增长理论当中。在新古典经济学框架下，本文通过理论模型分析，认为稳态下的经济增长率跟制度创新有着紧密的正向关的关系。在理论分析的基础上，本文基于1978～2012年的省际面板数据，利用半参数估计和线性回归估计方法，实证分析结果表明：国家财政干预的增强、国有经济的强化和垄断作用加强从整体上抑制了我国以及不同地区的经济增长，提高市场开放度和对产权的保护程度则对经济增长产生了积极的正向促进作用，制度差异是引起我国区域经济增长差异的重要因素之一，制度创新仍是当前我国经济增长的关键。     

Firm resources,competitive actions and performance: investigating a mediated model with evidence from the in‐vitro diagnostics industry

Building on the resource‐based view (RBV) and competitive dynamics literatures, this paper proposes that considering resources or actions independently offers an incomplete understanding of the drivers of superior performance. Instead, we hypothesize that resources enable competitive actions and that when these actions leverage the firm's resources, superior performance results. We tested these hypotheses with panelized data on the technological resources and competitive actions of firms in the in‐vitro medical diagnostic substance manufacturing industry. The results provide substantial support for our hypotheses, specifically with respect to mediation. Our theory and results underscore how the integration of the competitive dynamics and RBV literatures can significantly improve our understanding of firm performance. Copyright © 2011 John Wiley & Sons, Ltd.     

我国农村普惠金融发展的现状及思考

本文首先介绍了普惠金融以及农村普惠金融的相关概念,然后简要介绍了我国农村普惠金融已取得的阶段性成就,分析了存在的问题,并提出了改革建议。希望通过对现状的分析,厘清进一步深化改革的思路,进而为我国农村普惠金融的可持续发展提供借鉴。     

浅谈价值工程在地下管线探测项目设计方案评价中的应用

价值工程作为一种将功能与成本、技术与经济相结合而进行技术经济评价的方法,又称为价值分析。本文通过结合地下管线探测项目的具体实例,探讨了在具体的施工过程中,为了在降低工程成本的同时能够有效的保证施工工程的质量和进度,如何采用价值工程的方法选择以及优化施工组织设计的方案。实践证明,在施工项目中应用价值工程的方法不仅能够完善施工方案,还能有效确保施工进度并且能够有效提高利润,最重要的是还能够很好的保证施工质量。