闭式水泵振动超标原因分析及处理方法

分析闭式水泵振动的原因,根据运行及检修数据统计,提出了解决闭式水泵振动的方法以及预防措施。     

Transdisciplinary Research in Sustainable Operations – An Application to Closed‐Loop Supply Chains

This contribution provides implications for academic research and practitioners, as it identifies the lack, necessity and major benefits of transdisciplinary research and the collaboration of academics and industry in order to fulfill the goals of a sustainable supply chain. Closed‐loop supply chain management is a major contributor to implementing sustainable operations. An essential prerequisite for successful realization is the expertise and cooperation of representatives from engineering, management and natural sciences as well as practice. We identify a need for transdisciplinary collaboration within two steps. First, a literature review points out that various research disciplines as well as practice mostly operate in isolation. Second, we develop a framework that highlights the benefits of collaboration between these research areas. This paper provides an overview to better understand current trends in this complex field, which is a rich area for research that is still in its infancy. Copyright © 2013 John Wiley & Sons, Ltd and ERP Environment     

Information Structure and the Tragedy of the Commons in Resource Extraction

Synopsis This paper considers the well-known Levhari-Mirman discrete-time model of resource extraction, and investigates the effects of the information structure of the dynamic game – open-loop, Markovian or history-dependent – on the equilibrium consumption path and the overall utility of the agents. Due to the special structure of the model, the open-loop regime yields a Pareto-optimal outcome. The Markovian regime leads to the most pronounced version of the tragedy of the commons. History-dependent behavior yields an outcome set that is intermediate between the other two cases, and that may include the Pareto-optimal outcome in some cases. The level of efficiency of equilibrium behaviour is thus U-shaped as a function of the level of information the agents’ extraction strategies are based on. The analysis suggests that in environments characterized by a dynamic (and no market) externality, forcing agents to commit to open-loop behavior would constitute welfare-improving regulation.     

Cost of fractures commonly associated with osteoporosis in a managed-care population

Objective: To examine direct costs of hip, vertebral, and non-hip non-vertebral (NHNV) fractures, and to estimate the rate of osteoporosis (OA) diagnosis and treatment in the fracture population.

Methods: Subjects ≥ 45 years with a new hip, vertebral, or NHNV fragility (closed) fracture between June 30, 2002 and June 30, 2006 were studied retrospectively. All-cause and fracture-specific medical costs were calculated from medical claims in the 12-month baseline and follow-up periods. Total healthcare costs included pharmacy and medical costs. Diagnosis for OA and OA treatment were identified in both the baseline and follow-up period from diagnosis codes on medical claims for OA, and from pharmacy claims for treatment. Analyses were performed separately for commercial (COM) and Medicare Advantage (MA) populations and stratified by fracture type. Generalized linear models were estimated for total follow-up healthcare cost.

Results: The study sample included 36,521 COM and 10,160 MA subjects. Hip fracture subjects had the highest follow-up medical costs in unadjusted and adjusted analyses (COM: mean $35,898; median $22,945; MA: mean $32,919; median $26,047). Follow-up costs were much higher than baseline costs. Fracture-related costs accounted for a large proportion of follow-up medical costs. Although rates of osteoporosis diagnosis and treatment increased from baseline to follow-up, the majority of both COM and MA subjects had no evidence of osteoporosis diagnosis or treatment in either period.

Conclusions: Despite limitations of this study, including conventional generalizability issues, and sensitivity and specificity of claims-based diagnoses, results are consistent with other research and provide compelling results of substantial cost burden of fractures related to osteoporosis. Low rates of osteoporosis diagnosis and treatment among patients with costly fragility fractures underscore the opportunity for managed care organizations to initiate comprehensive disease management programs in osteoporosis.     

山东半岛近海渔业资源修复与可持续发展对策

本文以山东半岛近海渔业资源的修复与可持续发展对策为研究主题,对山东省伏季休渔的规定和做法进行了梳理,以放流品种为线索总结了增殖放流的情况,得出了其有增加经济渔业资源、改善海洋生态环境、提高渔民捕捞收益等结论。本文在分析了近海渔业资源修复工作存在的不足与问题基础上,还提出了要控制沿海排污总量、实施捕捞配额制度、设置渔业资源保护区、发展海洋生态渔业、实现近海渔业资源修复与可持续发展的对策建议。     

北美新一代合作社经验对中国林业合作社发展的启示

相比于农民专业合作社,国内学者对于林业合作社的研究还相对较少,但随着集体林权制度改革的逐步落实,越来越多的个体经营的林农会希望通过加入合作社来提高组织化程度,共同抵御市场风险,最终实现提高林业经营收益的目标。通过介绍北美新一代合作社组建、发展过程中的成功经验,初步探索适合当前中国林业合作社发展状况的合作社规范化发展措施,力图通过具体措施的实施来实现促进中国林业合作社更好更快发展的目的。     

常闭式挡车装置的设置与应用

介绍了煤矿斜巷轨道运输中挡车装置的设置和两种常闭式挡车装置的应用.     

高速公路封闭改造对周边路网通行能力的影响分析

高速公路封闭改造会对周边路网的通行能力造成影响,对相关路网进行通行能力分析是论证施工交通组织方案切实可行的依据。本文结合京台高速蚌埠至合肥段改造工程论述了对周边路网通行能力分析的几个关键点。     

运输问题出现退化解时0元添加的改进方法

运输问题表上作业法确定初始基可行解时,可能出现退化解,此时应当在适当的位置添加一个0元。本文探讨了这种情况下,如何恰当选取0元添加的位置,以减少表上作业法调整的工作量,最后提出了0元添加的改进方法。     

劣势煤炭企业实施关闭破产的障碍与对策

指出劣势煤炭企业会导致国有重点煤炭企业整体素质下降、市场竞争能力弱化、经济效益滑坡,如不对这些劣势煤炭企业实施关闭破产等退出机制,将制约我国煤炭工业的发展。阐述了煤炭企业实施关闭破产的意义,分析了劣势煤炭企业实施关闭破产存在的障碍,并提出对策与建议。