LOGO!控制器在纺织厂空调系统中的应用

将西门子公司的LOGO !可编程控制器和电动机变频技术应用于纺织厂空调系统中 ,既克服了现有系统的不足 ,又提高了系统可靠性 ,降低了能耗 ,满足了各车间的工艺要求 ,保证了纺织产品的质量 ,经实际使用表明该方案是合理的 ,并可以在同类场合使用     

弯曲液面的附加压强

本文主要从球形液面内、外的压强差和任意弯曲液面内、外的压强差两个方面推导 了弯曲液面的附加压强公式。     

烹调油烟的免疫毒理学研究进展

烹调油烟是室内主要空气污染物之一，化学成分复杂，严重影响职业接触人群的健康．对烹调油烟免疫毒性的研究是全面评价其毒性作用的一个重要方面．对近几年来烹调油烟影响机体细胞免疫、体液免疫和巨噬细胞以及NK细胞功能等免疫毒性方面的研究进展作一综述．     

绿色供应链管理动力/压力影响模型实证研究

文章借鉴国外文献及国内环保专家的意见设计问卷进行调研,通过因子分析识别出中国制造企业绿色供应链管理的压力/动力和实践的主要因子.对因子进行相关分析和回归分析,根据数据结合国内外相关情况探讨动力/压力是如何影响绿色供应链管理实践,提出中国制造企业绿色供应链管理的动力/压力影响模型.     

内镜下气囊扩张治疗贲门失弛缓症的近、远期疗效

目的 :回顾气囊扩张治疗贲门失弛缓症的近、远期疗效及治疗过程中的经验。方法 :对经食管吞钡X线拍片确诊的 16例贲门失弛缓症患者 ,采用内镜下气囊扩张治疗并评价其近、远期疗效。结果 :近期疗效 :16例患者中 ,12例 (75 % )显效 ,4例 (2 5 % )有效 ,总有效率为 10 0 % ;远期疗效 :16例患者中 ,1例 2周后复发经再次扩张治疗后未复发 ,另有 1例在治疗后的半年内复发扩张治疗后 ,半年再次复发 ,经直径 4 .0cm气囊扩张后 4年未复发。结论 :气囊扩张治疗贲门失弛缓症有效、易操作、安全、并发症少及复发率低 ,但有较多的细小经验及体会值得总结 ,以便更完善和更成熟。     

Household debt and financial assets: evidence from Germany, Great Britain and the USA

Summary.  We explore the determinants of debt, financial assets and net worth at the household level by using survey data for Germany, Great Britain and the USA. To identify which households are potentially vulnerable to adverse changes in the economic environment, we also explore the determinants of a range of measures of financial pressure: the probability that a household has negative net worth; the debt-to-income ratio; mortgage income gearing; the saving-to-income ratio. Our empirical findings suggest that the poorest and the youngest households are the most vulnerable to adverse changes in their financial circumstances.     

我国中小企业面临的压力与对策

随着经济全球化的进一步发展,中国市场与国际市场逐渐融为一体,我国的中小企业将遇到更加激烈的竞争。我们必须抓住机遇,利用当前出现的国内外有利条件,制订应对挑战的策略,使中小企业在新环境里不断发展。     

论学练太极拳三要素

采用理论与实践相结合的研究方法,对学练太极拳三要素,即调形、调心、调息进行了分析和探讨,同时对学练过程中容易出现的问题,结合实例予以举证,并提出了相应的解决思路和办法,旨在提高广大太极拳爱好者的练拳质量,增强锻炼效果,促进我国太极拳运动的普及与发展。     

Nonparametric smoothing in the analysis of air pollution and respiratory illness

While most of epidemiology is observational, rather than experimental, the culture of epidemiology is still derived from agricultural experiments, rather than other observational fields, such as astronomy or economics. The mismatch is made greater as focus has turned to continue risk factors, multifactorial outcomes, and outcomes with large variation unexplainable by available risk factors. The analysis of such data is often viewed as hypothesis testing with statistical control replacing randomization. However, such approaches often test restricted forms of the hypothesis being investigated, such as the hypothesis of a linear association, when there is no prior empirical or theoretical reason to believe that if an association exists, it is linear. In combination with the large nonstochastic sources of error in such observational studies, this suggests the more flexible alternative of exploring the association. Conclusions on the possible causal nature of any discovered association will rest on the coherence and consistency of multiple studies. Nonparametric smoothing in general, and generalized additive models in particular, represent an attractive approach to such problems. This is illustrated using data examining the relationship between particulate air pollution and daily mortality in Birmingham, Alabama; between particulate air pollution, ozone, and SO₂ and daily hospital admissions for respiratory illness in Philadelphia; and between ozone and particulate air pollution and coughing episodes in children in six eastern U.S. cities. The results indicate that airborne particles and ozone are associated with adverse health outcomes at very low concentrations, and that there are likely no thresholds for these relationships.     

上海市空气污染造成人群健康经济损失的研究

文章通过对上海市空气污染季节性状况的描述 ,分析了各种污染物的污染程度和变化趋势 ,并利用对上海某市级医院的实地调查数据 ,对空气污染物与医院呼吸系统疾病患者日门诊量之间的相关关系进行研讨 ,建立了多元分析模型 ,探讨了患者健康经济损失的计量方法 ,并对由空气污染造成呼吸系统疾病患者健康经济损失进行了估算。研究表明 ,在其他条件不变的情况下 ,NOX 日指数每增长 10 % ,被调查医院呼吸系统疾病患者的日门诊人次增加 7 7人次 ,而这些疾病患者由于患病产生的年度健康经济损失为 2 11万元。据此作保守的推断估计 ,上海市一年内因NOX 超标而发生的呼吸系统疾病门诊行为造成的健康经济损失可以达到 4 2亿元。同样 ,SO2 和TSP造成门诊患者的健康经济损失分别为 1 5亿元和 0 86亿元