Should auld acquaintance be forgot? the reverse transfer of knowledge through mobility ties

While mobility's effect on knowledge transfer to firms that hire mobile employees is well demonstrated, we choose to explore mobility's effect on knowledge transfer to firms that lose these employees. Focusing on this ‘outbound mobility’ allows us to isolate effects of social mechanisms associated with mobility. We find that semiconductor firms losing employees are more likely to subsequently cite patents of firms hiring these employees, suggesting that mobility‐driven knowledge flows are bidirectional. In addition, the outbound mobility effect is pronounced when mobility occurs between geographically distant firms, but attenuates for geographically proximate firms since other redundant knowledge channels exist within regions. Copyright © 2009 John Wiley & Sons, Ltd.     

International,intra-national and inter-firm knowledge diffusion and technological catch-up: the USA,Japan, Korea and Taiwan in the memory chip industry

Using data on US patent citations, this paper investigates the pattern of international, intranational and interfirm knowledge diffusion in the process of technological catch-up by Japanese, Korean and Taiwanese firms in the memory chip industry. First, regarding international diffusion, this paper finds that the ordering of citations is exactly the same as the order of entry into the industry: Taiwanese firms tend to cite Korean firms, Korean firms tend to cite Japanese firms and Japanese firms tend to cite US firms. Second, the degree of intranational knowledge diffusion is proportional to the level of technological capability or order of entry, although it is also affected by organisational differences among the firms. Third, the difference in patterns of interfirm knowledge reflects difference across organisations, such that big Korean group firms are less oriented toward interfirm knowledge diffusion compared with their Taiwanese small and medium enterprise (SME) counterparts. To explain such difference, the role of government research institutions has been highlighted, especially since the Industrial Technology Research Institute (ITRI) accounts for the lion's share of Taiwanese-held patents and in the spin-offs of many firms in the industry.     

330MW机组氢气泄漏问题的分析及处理

氢冷发电机组的漏氢量大小直接影响到发电机组的安全稳定运行,是发电机安评的一个重要指标。文章介绍了大唐桂冠合山发电有限公司(以下简称合山发电公司)的北重产330MW机组漏氢量超标的原因分析及在检修中对#2机组漏氢分析、处理的经验,对火力发电厂同类型机组处理漏氢问题具有一定的借鉴意义。     

330MW机组氢气泄漏问题的分析及处理

氢冷发电机组的漏氢量大小直接影响到发电机组的安全稳定运行,是发电机安评的一个重要指标。文章介绍了大唐桂冠合山发电有限公司（以下简称合山发电公司）的＂北重＂产330MW机组漏氢量超标的原因分析及在检修中对#2机组漏氢分析、处理的经验,对火力发电厂同类型机组处理漏氢问题具有一定的借鉴意义。     

一个半导体PN结从未提及的问题的探讨

PN结是半导体技术的关键所在,它又称为内电场,具有一定的电位差,但为什么做成二极管后在它的两端却没有电压呢?这个问题在所有的模电书籍上都未提及。本文针对这个问题进行分析探讨。     

过氧化物增白牙齿技术概述

随着人们对口腔卫生的日益关注，增白牙齿技术变得越来越重要。由于过氧化物在预防口腔病症中的具有重要作用及其增白作用，研究过氧化物增白牙齿产品成为一个重要课题。本文介绍了近十余年来过氧化物增白牙齿产品中的增白剂、增稠剂、磨擦剂、保温剂等方面的研究情况，并且提出了需要进一步改进的方面。     

离子液体在净化CO2,SO2,H2S方面的研究进展

离子液体作为一种绿色溶剂已开始应用到空气污染治理中,对CO2,SO2,H2S具有良好的溶解性能,作为气体吸收剂具有效率高、适用范围广、可循环利用等优点,因而受到人们关注.介绍了离子液体作为气体吸收剂的一些特点和吸收CO2,SO2,H2S的应用研究进展,展望了离子液体今后的研究方向.     

硫化亚铁自燃在检修中的危害及预防

普光气田为高含硫气田,自投产以来,检维修单位经常接触到各种涉硫作业,这给作业人员安全带来一定的影响,本文通过对硫化亚铁自燃产生的危害及采取预防措施进行了分析,最终成功保证了作业期间的安全。     

新一代灵活型加氢裂化催化剂FC-32的研制

FC-32加氢裂化催化剂是中国石化抚顺石油化工研究院开发的新一代灵活型加氢裂化催化剂。该催化剂采用新技术制备,酸性组分和加氢组分可在催化剂中均匀分布,具有适宜的加氢裂化活性、很高的开环选择性、良好的稳定性、较强的温度敏感性和优先裂解重组能力,可用于生产高芳潜重石脑油,高十六烷值清洁柴油以及低BMCI（芳烃指数）值、富含链烷烃、T90点和干点较原料油显著降低的加氢裂化尾油产品。     

利用闲置设备生产甲醇的经济可行性分析

通过对目前制氢装置供氢平衡分析，提出利用停用的制氢B系列装置，来生产以天然气为原料的甲醇产品。文章分析了甲醇市场价格走势与生产甲醇的可行性。认为投资生产甲醇，提高了制氢装置利用率。并具有较高的投资间报。