2002年我国猪肉产销简析

本文简要分析了今年猪肉产销形势,提出了我国猪肉外贸战略上应该考虑的几个重要问题。     

国外炼油厂含油污泥处理技术

镇海炼油化工股份有限公司研究中心　浙江省宁波市　３１５２０７ 摘要：介绍了国外炼油厂有关含油污泥处理的污泥调质和机械脱水、泥饼的热处理和解吸,污泥的生物处理和溶剂萃取以及油的回收利用等技术。对处理效果和处理成本作了分析。最后,对发展我国含油污泥处理技术提出了建议。     

发电机定冷水系统不明异物的表征和分析

为解决发电机定子线圈槽的异常升温现象,利用扫描电子显微镜、能谱仪等现代分析手段对300MW发电机定冷水系统不明异物进行了表征和分析。结果表明,定冷水箱中的不明异物是离子交换有机树脂、腐蚀产物氧化铜、氧化铁以及外部引入的硅胶和泥沙;过滤网中的不明异物是腐蚀产物氧化铁及碳酸钙等所组成的颗粒混合物。由于异物的堵塞导致发电机定子线圈槽的异常升温。提出了解决方法,为大型发电机组长期安全稳定运行提供了实用数据和科学依据。     

穿甲弹异物阻滞膛炸机理数值仿真分析

以某穿甲弹近炮口处膛炸故障为背景,针对膛内存在异物时弹体和身管动态响应进行数值仿真,探讨膛炸机理并为故障分析与归零提供依据和参考。设定了两种典型异物阻滞形式：一是 异物阻滞造成弹体速度急剧下降或卡膛;二是弹体直接高速冲击膛内沙土类异物。采用有限元分析AUTODYN软件进行了多种不同工况数值计算,得到了弹体速度急剧下降时弹底燃气流场压力特征、身管变形与破裂形态,以及弹体高速冲击沙土类异物时结构动态响应、身管变形与破裂形态。研究结果表明：弹体膛内突然受阻和速度急剧下降,导致底部燃气中形成激波和局部高压区,局部高压区的存在可造成膛炸;弹体膛内近炮口处高速冲击沙土,身管受到复杂的强动载荷作用并可造成膛炸;数值仿真结果与实际故障情况相吻合并得到了故障复现试验的验证。     

降低轧棉和纺纱工序中杂质的模块化解决方案

杂质分离器是一种有效的降低纤维杂质的工具。搭配几种灵敏感应器模块的系统能有效地检测和去除几类杂质。这样的系统也可成功地用于轧棉工序。     

Environmental Innovations,Local Networks and Internationalization

This paper investigates the forces correlated with environmental innovations (EIs) introduced by firms in local production systems (LPS). The role of inter-firm network relationships, agglomeration economies and internationalization strategies is jointly analysed for a sample of 555 firms in the Emilia–Romagna (ER) region (North-East Italy). Cooperating with a certain kind of local actors—i.e. suppliers and universities—is the most important EI driver for the investigated firms, along with their training coverage and their adoption of information and communication technologies. The role of agglomeration economies is instead less clear-cut. They spur EIs only in the presence of established LPS, with idiosyncratic sector specialization, while conversely they act as EI barriers. Networking effects and agglomeration economies are instead found to strongly promote the adoption of EIs by multinational firms, thus highlighting the importance of local–global interactions. Interesting specifications for these results are found for particular kinds of EIs, in such fields as CO₂ abatement and ISO labelling, generally extending the analysis of EI drivers by joining local and international factors. In addition, the role of regulatory sector factors confirms the induced innovation hypothesis and provides a robustness check to our results.     

Multinational firms in the world wine industry: an investigation into the determinants of most-favoured locations

The objective of the paper is to identify some of the determinants of foreign investment of the largest multinational enterprises (MNEs) operating in the wine industry. The factors that drive firms to invest abroad and those that determine the location of those investments are examined in the case of the world wine industry. The list of the largest MNEs has been compiled using financial databases and company websites. Spearman rank correlation values are calculated between the ranking of the location popularity of host countries and the ranking of the independent variables or indices for the same period. The results of this study have some important implications. They indicate that location-specific advantages of host countries do provide an explication of the internationalization of firms in some preferred countries rather than others.     

移动IP中的一种路由优化方案

为满足移动计算机用户对。Internet的接入需求，针对当前的IPv4协议不支持主机移动性的缺陷，IETF制定了移动IP协议。该协议有效地解决了上述问题，却引入了三角路由问题。首先分析了几种优化三角路由问题的方法，然后提出了一种新的方案，并作了详细分析。     

外语学习焦虑的研究

运用外语课堂焦虑量表(FLCAS)从外语学习努力、动机等方面进行调查,结果发现:(1)努力与焦虑并没有明显的相关.焦虑与学生的成绩以及满意感有显著的相关.成绩与满意感与努力又有显著的相关.(2)在外语学习动机上,趋动机高与低的学生在成绩与焦虑感上都没有显著的差异,避动机高的学生比避动机低的学生有更强的焦虑感,但他们的成绩没有显著的差异.(3)男女生在外语成绩上有显著的差异但在外语焦虑水平上没有显著的差异.(4)大二学生与大一学生的焦虑感没有显著性差异.     

外语教学中文化意识的培养

语言和化相互影响、相互制约，语言中蕴涵着丰富的化。本揭示化的基本内涵，分析外语教学中化意识的作用，列举化意识培养的内容，最后重点探讨化意识培养的途径。