Determinants of co-movement and of lead and lag behavior of business cycles in the Eurozone

In this paper we study business cycle correlations in the Eurozone and its determinants. Additionally, we also analyze the determinants of the lead and lag behavior of business cycles in the Eurozone. We explore the relevance, in the Eurozone context, using GDP and employment as the business cycle measures, of the determinants of business cycle synchronization identified in the literature, namely bilateral trade intensity, dissimilarity of labor market rigidity, dissimilarity in industrial structures, financial openness, and foreign direct investment relations. We estimate a simultaneous 4-equations model by Ordinary Least Squares (OLS) and three-stage least square to investigate empirically the above-mentioned determinants of business cycle correlation. Bilateral trade relations present a positive influence on business cycle correlations, while the dissimilarity of labor market rigidity presents a negative influence. The rest of the above-mentioned variables are non-significant. These results are robust to the use of the Hodrick–Prescott-filter and first differences as the de-trending methods, as well as the use of GDP as the business cycle measure, excluding the financial crisis years (2008 and 2009). Results for employment as the business cycle measure are in contrast with the previous ones, and found industrial dissimilarity to be the relevant variable to determine business cycles synchronization. In what concerns the determinants of the lead and lag behavior, results show that the member states of the Eurozone that usually lead the cycle are the ones that are wealthier, with strict employment legislation, more specialized in construction and finance sectors, and more prone to international capital movements. Differences in the determinants between contemporaneous business cycles and lead and lag behavior of business cycles are especially important for policy-makers in the Eurozone to know about, in particular if asymmetric shocks between countries are set in place.     

谈高污染人群的职业性铅中毒及其预防措施

汽车修理和驾驶人员是交通运输行业中铅的高污染人群,汽油中的铅会通过呼吸道、消化道及皮肤侵入人体,引起铅中毒。阐述了职业性铅中毒的危害,职业性铅中毒的种类、症状和临床表现,职业性铅中毒的诊断治疗;并提出了职业性铅中毒的预防措施,以引起社会有关部门的关注。     

职业铅中毒及其安全防范

根据铅的理化性质、铅化合物及职业性铅接触人群,详细介绍了铅中毒的作用机制、铅中毒的主要途径及危害、铅中毒的临床表现,同时指出了铅中毒的诊断与鉴别诊断以及职业性铅中毒的预防措施。     

An Application of a Displaced Poisson Process*

Abstract A displaced Poisson process is presented as a reasonable model in describing the stages of certain chronic diseases. Although in some respects the model is an oversimplification of the true picture its feature is that it facilitates the easy estimation of some of the important parameters that arise in this area. Among the quantities estimated are the mean lead time and the distribution function of the time spent in the preclinical state. Properties of some of the estimators are obtained.     

白河油区长8油层前置酸压裂研究

本文基于白河长8油层在勘探开发过程中的低产低效问题,在总结该地区储层的物性特征、岩矿组分以及敏感性基础上,分析了前置酸压裂技术在白河油区的可行性,建立了适用于研究区的前置酸液体系,筛选出了相应的支撑剂。通过压裂酸化软件模拟及分析,优化了前置酸压相关参数。     

小口径深孔钻探冲洗液循环阻力测算

本文对钻探冲洗循环阻力进行了概述,研究了小口径深孔钻探钻杆内压力损失计算,同时探讨了小口径深孔钻探冲洗液循环阻力测算实例,以期为小口径深孔钻探冲洗液循环阻力测算提供一些参考,有效减少小口径深孔钻探过程中冲洗液所受的循环阻力,提升小口径深孔钻探效率和钻探深度,推动我国小口径深孔钻探的不断发展。     

贵州普安铅厂尾库矿土壤污染特征及风险评价

贵州省是矿产资源最为丰富的省份之一.但不合理的矿产资源开采和矿渣堆积,导致周边土壤受到不同程度的污染,并伴生相关生态环境问题.以贵州省普安县铅厂尾库矿周围污染土壤为研究对象,通过详细的现场调查,以及对土壤进行取样测试砷、镉、铜、铅、汞、镍等元素含量,查明了研究区土壤污染源特征和分布.研究结果表明:研究区未发现危险废物,区内废渣属二类固体废物;土壤的污染途径主要包括有毒有害物质及污染物贮存、遗撒引起的扩散迁移以及干湿沉降造成的污染;土壤中砷的所有暴露途径的总致癌风险大于10-6,砷的总危害指数大于1,部分点位超过第二类用地土壤污染风险管控值,地块存在一定的风险.其研究结果可为污染土壤的改性和风险管控措施研究提供参考依据.     

深孔松动爆破技术在7213综采工作面的应用

7213综采工作面机巷处有火成岩,会对机械设备造成严重损害,同时影响工作面的推进速度。针对此难题,尝试在7213工作面机巷应用深孔松动爆破技术,在分析深孔松动爆破技术原理的基础上,详细介绍了该技术的钻孔布置方式、施工工艺及效果评价要求。尝试取得了很好的效果,有效提高工作面推进速度,极大改善综采工作面工作环境。     

民族地区地理标志战略中多元主体的作用分析

地理标志战略是民族地区实现经济社会跨越式发展的动力,针对目前民族地区地理标志保护不充分的现状,政府应该在地理标志战略的制定与实施中起主导作用,但政府也会失灵,地理标志权的私权属性也排斥政府的过度干涉,这就要求其他相关主体联动参与到地理标志战略的制定实施中。     

基于骨架模型的打孔机自顶向下设计

文章结合Pro/E骨架建模和打孔机自身结构的特点,介绍Pro/E软件下基于骨架模型的打孔机自顶向下设计方法和实用技巧。通过该设计方法,可以方便实时地对设计的产品进行结构分析和合理修改,缩短设计研发周期,降低产品生产成本,并通过对骨架模型的参数修改,实现机械产品的系列化设计。