总承包项目物资和设备管理浅析

目前国内越来越多的工程项目采用总承包模式(EPC)进行建设。物资管理工作是总承包项目管理工作的重要组成部分,是总承包项目顺利实施的前提。从项目现场物资管理需要的角度对物资的精细化管理进行探讨。     

城市森林固定CO2价值评估

本文利用我国第四次森林资源清样调查资料对上海市森林植被碳储量和碳密度的估算结果,结合植物的光合作用过程计算上海市森林固定CO2的能力,采用造林成本法对上海市森林固定CO2的价值进行了评估。笔者希望通过该研究激发人们保护城市森林以维持城市生态系统可持续发展的积极性,并为合理地进行城市森林管理和城市绿化提供参考。另外,利用系统连续的森林资源清样调查资料评估森林植被的固碳价值,能够对我国更好地履行《联合国气候变化框架公约(》UNFCCC),并为依据《京都议定书(》KyotoProtocol)进行环境外交提供帮助。     

财政政策与经济增长——基于内生货币框架的分析

在内生的货币金融体系下，财政作为另外一层意义上的货币政策，可以在很大程度上改变银行和企业的资产负债表，调节资本存量和收入分配，从而对经济增长的稳定发挥重要作用。结合中国宏观经济运行状况，具体考察了财政政策手段对宏观经济、企业及货币供应量的影响，发现财政政策只有和货币政策协调配合使用，才能达到存量与流量的平衡，从而保证经济的稳定增长。     

基于GIS和RS的蓄滞洪区和谐发展的技术路线

应用遥感与地理信息系统技术构建基于GIS模型的蓄滞洪区空间数据库,对蓄滞洪区内的基础地理数据进行存储、管理,并对空间数据进行可视化和空间分析等操作;运用RS技术对蓄滞洪区内的土地利用、生态环境变化等情况进行动态监测,建立蓄滞洪区发展指标体系;探求蓄滞洪区的和谐发展模式,为蓄滞洪区的可持续发展提供科学依据。     

林业收储在林权抵押贷款信用风险控制中作用研究

研究采用担保理论,通过实地考察福建省林业收储运作情况获取资料,基于控制林权抵押贷款信用风险的视角研究林业收储的作用;指出林权是林权抵押贷款关键的信用风险因素,但是,存在安全性与流动性风险等问题;介绍了林业收储运作流程并讨论了林业收储控制林权抵押贷款信用风险的路径,认为林业收储降低了抵押林权的真实性与变现性风险;指出林业收储存在过于依赖财政拨款、规模较小与缺乏合理的保值增值机制等局限性,林业收储无法从根本上化解林权抵押贷款中尚存在的抵押林权的安全性、流动性等风险;提出引入社会资本,建立政府财政收购机制,优化林权抵押贷款生态环境等建议。     

城市内涝治理系统设计要点及案例分析

城市内涝治理是一项系统性工程,在对内涝治理特征进行剖析的基础上,提出了达到治理目标的"三步法",并从源头减排、排水管渠及泵站、河湖水系、应急除险、信息化等方面总结了设计要点,从规划建设、运行维护、应急抢险等方面阐述了管理措施,介绍了几个典型城市的相关案例,为城市内涝治理提供参考和借鉴.     

The adaptive approach for storage assignment by mining data of warehouse management system for distribution centres

Among distribution centre operations, order picking has been reported to be the most labour-intensive activity. Sophisticated storage assignment policies adopted to reduce the travel distance of order picking have been explored in the literature. Unfortunately, previous research has been devoted to locating entire products from scratch. Instead, this study intends to propose an adaptive approach, a Data Mining-based Storage Assignment approach (DMSA), to find the optimal storage assignment for newly delivered products that need to be put away when there is vacant shelf space in a distribution centre. In the DMSA, a new association index (AIX) is developed to evaluate the fitness between the put away products and the unassigned storage locations by applying association rule mining. With AIX, the storage location assignment problem (SLAP) can be formulated and solved as a binary integer programming. To evaluate the performance of DMSA, a real-world order database of a distribution centre is obtained and used to compare the results from DMSA with a random assignment approach. It turns out that DMSA outperforms random assignment as the number of put away products and the proportion of put away products with high turnover rates increase.     

天然抗氧化剂茶多酚在食品贮藏保鲜中的应用

茶多酚主要由茶叶中提取而来,可用作食物贮藏和保鲜的天然抗氧化剂。由于其具有抗氧化、防癌、减脂和除臭等多项优点而受到越来越多的关注,目前,该物质已在医疗、食品和冷藏等多个领域得到广泛应用。本文主要针对茶多酚的抗氧化原理进行分析,并简单介绍其在食物保鲜方面的应用,希望为我国关于茶多酚的研究工作提供帮助。     

学习型组织之魂——团队学习

研究通过对相关文献的梳理,对建立学习型组织中最关键的团队学习的概念和特征进行了梳理。强调了团队学习必须从团队层面进行分析,不能将其与团队环境中的个人学习混为一谈。指出了团队学习的关键在于知识的获取、分享、存储和检索,并对四个环节及其相互关系进行了探讨。     

Emerging risk of autoignition and fire in underground coal storage

The risk and prevention of autoignition in underground coal storage facilities are reviewed in the light of the recent incidents of smouldering fires. Also, the opportunities are considered on the efficiency of the alternatives to prevent and extinguish closed-space fires. The complexities in avoiding and extinguishing underground fires are highlighted in the case example, describing the observations and outcome of a smouldering coal fire in the storage. The principles of self-heating and most critical factors in spontaneous combustion such as the condition and quality of coal are fairly well known, but usually only provide partial help in fire prevention. The documented cases and the case example suggest that nitrogen injection can be useful for extinguishing controllable fires. Three-phase foams and oxygen-displacing exhaust gases appear preferable against uncontrolled fires, particularly if access to the fire area is limited or impossible. Otherwise, efficient fire extinction during power plant operation can be challenging, as any air ingress tends to feed the fire and results in losses of the extinguishing agent and the heating value of coal. Methods and indicators for detecting and predicting the ignition are discussed, and improvements are suggested to enhance the storage and plant availability.