简析提高混凝土在工程中应用质量控制

混凝土广泛用于各种工程建设项目,是目前用量最大的建筑结构材料。现就混凝土工程中容易出现的质量问题、发生的原因及施工中应注意的事项进行分析和阐述。     

证券相关关系度量方法的实证研究

为了更精准地度量证券相关关系,本文借鉴了证券技术分析中的趋势分析,提出了一种基于证券趋势的证券相关关系度量方法.该方法可以避免短期波动对证券相关关系度量的影响,且具有较强的可操作性.本文简要介绍了目前常见的基于证券价格的相关关系和基于证券波动的相关关系度量方法的特点及缺陷,提出了基于证券趋势相关关系的度量方法,并通过实...     

基坑支护设想

常用的支护形式有放坡喷面支护、桩锚支护、土层锚杆支护。地下水的处理主要有深层水泥搅拌桩或粉喷桩、旋喷桩止水和轻型井点及管井降水。具体要依据水文地质条件、工程地质条件、基坑周边环境及安全等级进行结构设计,并进行技术经济分析及基坑监测。     

重量法测定钻井液用褐煤树脂水分含量不确定度分析

测量不确定度是当前国际上表示检测结果约定的做法,一个完整的测量结果,除了应给出被测量的最佳估计值外,还应同时给出测量结果的不确定度。对重量法测定钻井液用褐煤树脂水分含量的不确定度进行了分析评估,找出了影响不确定度的因素。当褐煤树脂水分含量为10.32%时,测量结果的扩展不确定度为0.19%（k=2）。     

2010年后中国以及上海的经济社会发展战略策略

中国社会发展存在的主要矛盾与潜在的经济、社会和环境危机,未来社会发展变化的趋势与内在逻辑;自然资源、地球环境的承载力,已经接近极限,只有绿色经济与绿色社会才有未来;公平分配的内涵、原则、方法与传导机理;货币价值与传导机制,利率、汇率变化关系问题,中国建设国际金融中心的目标与策略手段;绿色经济与自然生活远景;未来上海经济社会发展的方向问题等。     

西学东渐与清末民初安徽传统社会观念风气变化

社会观念、社会风气的转变是社会变迁的一个重要方面。清末民初安徽传统的“重义理，轻艺事”观念、“重农轻商”“重儒轻商”观念的动摇，男女平等观念开始出现端倪，旧的生活方式和政治生活方式的些许变化及读新书、阅报刊、学外语、出国留学等新风气的出现，表明清末民初安徽传统的社会观念、社会风气在一定程度上、一定范围内有了异于传统的变化。这些变化，既是外力冲击的结果，也是安徽自身为适应时代的变化而不断自我调整的结果。但这些变化主要是发生在城市、城镇及社会上层，广大农村及社会下层的观念、风气还是较为保守的，对安徽社会来说，要使变化从点发展到面，从上延伸到下，还需要一段路程要走。     

When to Use Loose or Tight Alliance Networks for Innovation? Empirical Evidence

This study examines the impact of different degrees of organizational coupling among the members of innovation alliance project networks on the commercial performance of collaborative innovations. Specifically, we study how type of innovation (modular vs. architectural innovation) moderates this relationship. Using data from 664 product innovation networks from five different industries in the United States, we find that the degree of organizational coupling among innovation network members significantly affects the commercial performance of collaborative innovations and that the type of innovation has a significant moderating effect. More specifically, the impact on commercial innovation performance of organizational coupling is positive for modular innovations and negative for architectural innovations.     

Procedural volume,cost, and reimbursement of outpatient incisional hernia repair: implications for payers and providers

Objective: This analysis aimed to evaluate trends in volumes and costs of primary elective incisional ventral hernia repairs (IVHRs) and investigated potential cost implications of moving procedures from inpatient to outpatient settings.

Methods: A time series study was conducted using the Premier Hospital Perspective^® Database (Premier database) for elective IVHR identified by International Classification of Diseases, Ninth revision, Clinical Modification codes. IVHR procedure volumes and costs were determined for inpatient, outpatient, minimally invasive surgery (MIS), and open procedures from January 2008–June 2015. Initial visit costs were inflation-adjusted to 2015?US dollars. Median costs were used to analyze variation by site of care and payer. Quantile regression on median costs was conducted in covariate-adjusted models. Cost impact of potential outpatient migration was estimated from a Medicare perspective.

Results: During the study period, the trend for outpatient procedures in obese and non-obese populations increased. Inpatient and outpatient MIS procedures experienced a steady growth in adoption over their open counterparts. Overall median costs increased over time, and inpatient costs were often double outpatient costs. An economic model demonstrated that a 5% shift of inpatient procedures to outpatient MIS procedures can have a cost surplus of?～?US $1.8 million for provider or a cost-saving impact of US $1.7 million from the Centers for Medicare &; Medicaid Services perspective.

Limitations: The study was limited by information in the Premier database. No data were available for IVHR cases performed in free-standing ambulatory surgery centers or federal healthcare facilities.

Conclusion: Volumes and costs of outpatient IVHRs and MIS procedures increased from January 2008–June 2015. Median costs were significantly higher for inpatients than outpatients, and the difference was particularly evident for obese patients. A substantial cost difference between inpatient and outpatient MIS cases indicated a financial benefit for shifting from inpatient to outpatient MIS.     

城市轨道交通项目社会评价探讨——以哈尔滨建设轨道交通体系为例

城市轨道交通由于投资规模大,社会影响深远,越来越为国家所重视。本文以哈尔滨建设轨道交通一号线为分析个案,不难发现哈尔滨在建设轨道交通一号线中体现出的对可持续发展和公众利益的考虑及措施。但由于城市轨道交通项目的评价研究还刚刚起步,有些方面还不完善,因此,有必要对城市轨道交通项目社会评价评价体系进行更加深入的研究。以确保哈尔滨轨道交通项目的顺利实施。     

V型墩刚构桥合拢段施工技术

宜春明月大桥工程采用V型墩与连续箱梁刚性连接形成V型墩刚构桥。该连续刚构桥构造复杂,且受施工环境因素制约,增加了该桥施工难度。本文结合宜春明月大桥实例,详细阐述V墩刚构箱梁合拢段的施工工艺和技术要点。