空气自动站监测与传统监测方法测定值的对比分析

为保证不同监测方法下监测数据的连续性、可比性以及正确判断环境空气变化规律，通过自动监测与传统的连续监测、五日法监测方法进行实验对比分析，找出传统方法与自动监测定值之间的偏差，探讨产生偏差的原因。     

海湾战争的特点和启示

本文阐述海湾战争的特点和启示,着重分析了现代空袭模式和防空面临的问题。     

Effects of atmospheric pollution on human health

Most air pollutants do not lead to specific diseases. Depending on the pollutant, the concentration and the duration of exposure, some organs are more affected than others. The most frequent disorders are those caused by irritant gases and particulates on the mucous membranes and respiratory organs. The consequences are eye, nose and throat inflammations, diminished lung function, increased susceptability to respiratory infection and a higher incidence of chronic bronchitis. These disorders and diseases are, of course, influenced by other factors as well, such as immune deficiency, allergies, occupational exposure to pollutants, and particularly smoking. The effects of air pollutants are, therefore, multifactorially conditioned and nonspecific disorders are placed in the foreground. Evidence for an association of air pollution with adverse effects on human health is drawn from three sources: animal experiments, experimental human exposures, and epidemiologic studies of exposed human populations. The burden of atmospheric pollution must be reduced to protect human health by an adequate safety margin. In particular, the increased sensitivity of sick and aged people as well as children should be taken into account. In defining the maximum emmission levels, preventive aspects should have priority so as to keep the risk of damage to health and the harmful influences on the environment to a minimum.This article Effects of atmospheric pollution on human health by H. U. Wanner is a revised version of the same article that was first published in the Proceedings of the 1990 European Aerosol Conference; special issue of the J. Aerosol Sci., Vol. 21, Suppl. 1 (1990) 389–396.Reprinted with kind permission from Pergamon Press Ltd, Headington Hill Hall, Oxford OX3 0BW, Great Britain.     

模糊聚类分析在大气环境质量评价中的应用

目前,对大气环境质量评价一般采用国颁《环境空气质量标准》将大气中某种污染物的浓度值与国颁标准 值进行比较来分类,其不足之处是没有考虑不同等级的多种污染物对分类的共同影响。本文以模糊聚类 分析理论为基础,结合郑州市1989年的大气环境监测数据进行分类评价,克服了上述的不足,获得比较客 观的结果。     

采用出口空气再循环的流化床谷物干燥系统模拟

建立了采用出口空气再循环的流化床谷物干燥系统数学模型，以大麦为物料分别计算了各种不同工况下采用出口空气循环时谷物干燥的能耗及费用等，并就各种计算结果进行了比较与讨论，所得结果对流化床谷物干燥系统参数的确定具有参考价值。     

航空运输可持续发展理论的分析和应用

针对航空运输的可持续发展问题进行了分析 ,讨论了航空运输发展的可持续现象 ,强调建设可持续发展的航空运输必须转变思想 ,平衡航空资源、社会需求和航空运输经济利益的关系 ,避免短期行为 ;经营上保持创新的活力 ,以有限的资源支持更大的航空运输需求。     

不安抗辩权制度评析

不安抗辩权制度是我国新合同法确立的一项重要法律制度，它的设立是我国立法的一大进步，其对合同的正确履行和社会经济生活、市场交换秩序都有重要的意义，但在实践中不安抗辩权制度仍然存在一定的缺陷，对此本文提出探讨性的意见及对策。     

黑龙江省伊春市五营国家森林公园负离子研究

根据伊春市五营国家森林公园中的空气负氧离子浓度的实测资料,利用空气离子单极系数及空气离子评价系数进行了评价和研究.结果表明,该森林公园中空气负离子含量达到国际旅游度假区一级标准,空气清洁度属于A级“最清洁”;在动态水周围的一定范围内随着与动态水的距离的逐渐增大,空气离子单极系数大致呈线性增加趋势;空气离子评价系数值大致呈线性减小趋势.而在这个范围之外,两个值都将趋于平缓;在分别以红松、冷杉和白桦三种树种为主体的纯林中,空气清洁度均在早晚时比较高,在中午时出现低谷.     

基于专家系统的防空火力分配模型

利用人工智能的原理,模拟军事专家的思维活动,建立基于专家系统的防空火力分配模型.该模型具有自学习功能,可自动获取和修改知识库中的知识,具有很好的实用性,可随时与用户进行交互.用产生式规则和原型表示可拦截条件及多目标优化分配原则等知识,采用了虚拟飞行时间作为综合威胁判断准则和可调整的分配始线和分配终线,能较好地满足实际需要.     

You are what you eat: native versus exotic Crotalaria species (Fabaceae) as host plants of the Ornate Bella Moth,Utetheisa ornatrix (Lepidoptera: Erebidae: Arctiinae)

Crotalaria plants and Utetheisa ornatrix are closely linked to each other: the larvae destroy the seeds, while the moth depends on hostplants for alkaloids. To better understand the ongoing co-evolution, the present study examines how native hostplants compare to exotic ones. Leaf-feeding on Crotalaria pumila, C. rotundifolia, and C. incana, native to the moth’s range, led to faster larval development than on the exotic C. lanceolata, C. spectabilis, and C. pallida. Seed-feeding on all species of Crotalaria led to accelerated larval development and a resultant larger adult moth, and correlates with a higher nitrogen content in the plant tissues. These results add a novel dimension to the previous studies of reproductive biology of this model organism. In controlled settings, mature larvae showed preference for leaves of C. spectabilis over those of other species, perhaps due to the higher alkaloid content. Differences in morphology and phenology of Crotalaria determine the ecology of U. ornatrix populations in Florida. The introduction of novel hostplants, on which U. ornatrix can have a significant negative effect and which are of concern to humans as invasive toxic weeds, has greatly expanded the niche occupied by this moth. Possible co-evolution of Utetheisa sensu lato and plant defences in the genus Crotalaria is discussed.