尿素下游产品的开发应用

面对严峻的市场形势,各尿素厂积极开发尿素下游产品并提高其技术含量。从开发尿素下游产品出发,对过氧化尿素、尿囊素等10余种尿素下游产品的生产情况和应用领域进行了阐述,指出以市场、科技为导向,把节能降耗、降低成本、提高竞争力作为目标,积极发展前景好、技术含量高、可以进一步向下游延伸的产品。     

二甲基亚砜的国内外市场分析

叙述了二甲基亚砜的内外市场概况，国内的产业现状，消费状况，近期价格变化及技术经济指标，提出存在的问题及发展建议等。     

低氢钠型药皮高铬铸铁焊条(D667)堆焊

磨损是设备失效之一,为解决磨损问题,提高设备运转率,通过焊接修复来提高工件的耐磨性能是目前国内外研究的重点。国外发达国家在20世纪90年代中后推广了硬面堆焊修复技术,近年来主要采用的堆焊修复方法,但是中国在这方面的研究正处于起步阶段。复合耐磨材料的堆焊研究具有很好的现实应用价值。堆焊过程中,工艺参数正确与否对堆焊质量的影响是至关重要的。本文研究是在Q235钢板上用低氢钠型药皮高铬铸铁焊条(D667)进行堆焊的研究。     

Integrating Suppliers into Green Product Innovation Development: an Empirical Case Study in the Semiconductor Industry

Green innovation has been recognized as one of the key factors to achieve environmental and economic success in markets. Understanding green product innovation development as a result of suppliers' involvement has become a strategic priority for academics and practitioners. This paper aims to explore and understand the role of suppliers in enhancing the manufacturer's ability to successfully carry out green innovation in product development. As a research methodology, a case study approach is employed. Primary data were collected through site visits and extensive interviews with corporate and plant management in Korea. Based on the Korean study, the paper presents following outcomes. First, there is a strong linkage between environmental compliance and green new product developments. Second, there is a strategically close relationship of environmental collaboration between suppliers and the buying company through technological integration. Finally, involving key suppliers in green new product development for environmentally demanding customers and markets can bring both environmental and commercial success. This research provides new insights on supplier involvement and green product innovation development in supply chain management. Copyright © 2011 John Wiley & Sons, Ltd and ERP Environment.     

日韩贸易摩擦的原因、影响及趋势分析

日本对出口韩国的生产半导体零部件的3种核心原材料采取管制措施,其根本目的在于掌握半导体乃至高技术领域的主导权。出口管制实施后,部分日本企业试图通过拓展其他国家市场来弥补因对韩出口管制造成的损失,也有些企业计划在海外设厂以便避开政府管制向韩国供应原材料。出口管制还导致日本产品在韩遭到抵制、韩国赴日游客锐减等。韩国通过半导体核心部件国产化、进口来源地多元化等对策,在一定程度上减少了贸易制裁对半导体行业的负面影响,使日本被迫放宽出口管制。由于日韩处于半导体全球价值链分工不同环节中,存在紧密的"一荣俱荣,一损俱损"的依存关系,因此,日韩贸易摩擦的缓和存在内在必然性。另外,RCEP签署以及中日韩自贸区谈判等外部因素会进一步促进日韩贸易关系改善。     

加氢装置高压临氢管道施工浅谈

通过对柴油加氢装置生产工艺特点的综合分析,结合工程设计及相关标准规范资料的研究,参与此类工程建设的经历,从原材料检验、质量管理、密封材料缺陷检查、处理、试压等方面展开研究,并提出了明确的预防、操作及管理方法和措施。     

有色金属循环利用技术进展

随着社会的发展,资源、能源、环境问题日益突出,资源循环利用越来越受到人们的关注.分析了我国有色金属循环利用领域的现状及存在问题,对当前有色金属循环利用领域最新发展趋势进行了讨论,并提出了建议.     

The prospects for a hydrogen economy (1): hydrogen futures

Common to all discussions and projections of ‘a hydrogen economy’ is the widespread use of hydrogen as an energy carrier. Such use requires the development and application of a range of different technologies, some similar to and some quite different from those in common use in current energy systems. This paper starts by briefly introducing and describing the physical characteristics, economics and functionality of these technologies, before discussing some of the hydrogen futures that have been proposed, and the great improvements to the technologies which will be required before they become competitive with alternative means of delivering the same energy service. Technology cost estimates are then used to explore through the use of formal modelling techniques some of the futures scenarios.     

Public Preferences for Hydrogen Buses: Comparing Interval Data, OLS and Quantile Regression Approaches

We use a quantile regression (QR) approach to analyse contingent valuation estimates of public willingness to pay (WTP) for the air and noise pollution reductions associated with the introduction of hydrogen buses in London. QR results show that variables that were not significant in interval regression or ordinary least squares regression become significant at certain quantiles along the WTP distribution. In addition, the determinants of WTP at the lower tail of the distribution differ from those at the higher end of the distribution. Our findings illustrate the usefulness of quantile regression methods for analysing contingent valuation data, enhancing our understanding of the determinants of willingness to pay.     

食品中油脂提取及过氧化值检测方法的优化

虽然目前可通过过氧化值检测方法对食品中油脂的过氧化值进行测定,并根据测定值来准确判断油脂中过氧化物的含量,但相关检测方法在应用过程中仍存在较多问题和不足,影响了检测的准确性和有效性.本文阐述了食品中油脂的提取方法、食品中油脂的过氧化值检测方法及检测方法应用中存在的问题,并提出优化过氧化值检测方法的应用策略,为食品中油脂过氧化值的测定提供参考.