部分相干涡旋光束在湍流大气中的相干性

根据广义的惠更斯-菲涅耳原理,得到了部分相干涡旋光束在湍流大气中传输时光谱相干性的理论表达式,然后详细研究了光束在湍流介质中传输时相干性的变化规律。研究表明,部分相干涡旋光束通过湍流介质后,光束的相干性主要受到湍流扰动强弱和光束所带的拓扑电荷数多少的影响,而与光源本身的相干性无关。光源所带的拓扑电荷数越多,光束的相干性越差;湍流扰动越强,光束的相干性越好。     

论文物环境对文物保护的影响

长期以来文物保存环境一直受到人们的关注,文章着重论述了文物保存环境对文物的影响,并通过多个实例说明了文物保存环境的破坏给文物带来的种种损害,指出了整治文物保存环境和文物保护的重要性,为整治文物保存环境和文物保护提供了新的思路.     

中国大气污染防治技术综述

我国大气污染严重,污染废气排放总量处于较高水平。为控制和整治大气污染,“九五”以来,我国在污染排放控制技术等方面开展了大量研究开发工作,取得了许多新的成果,大气污染的防治也取得重要进展。     

Studying the stability of the middle atmosphere (30―60 km) over Wuhan by Rayleigh lidar

The stability of the middle atmosphere ranging from 30 km to 60 km over Wuhan is elementarily studied, according to the observational data obtained in about one year through the WlPM Rayleigh lidar. The stability parameter （buoyancy frequency squared）, which was obtained through the temperature field, shows that the middle atmosphere over Wuhan is stable all the year round, but the stability appears variable because the stability of summer and winter is lower, and that of spring and autumn is higher.     

学校组织和谐气氛的营造

和谐是当代社会的要求,是时代的主旋律,对于学校来说,如何营造学校组织和谐气氛,构建和谐学校组织,是学校重要而迫切的任务。本文从管理学、心理学、文化学的角度,对学校组织和谐的内涵、特征、功能,以及如何营造学校组织和谐气氛,实现学校组织和谐的原则、内容,作了深入的探讨。     

新建本科院校加强考风建设探究

考风建设是高等院校教学与管理的一个重要环节,是学风、教风和校风建设的重要体现.当前学生考风问题备受社会广泛关注,加强考风建设迫在眉睫.基于此,对新建本科院校考风建设的现状及主要原因进行了较为全面的分析,并提出了加强考风建设的具体举措:树立三种意识、抓好两个环节、做好三个引导.     

饮用水中有机污染物的深度处理技术

该文分析了饮用水中有机污染物的种类、危害及自来水厂处理工艺现状,在常规给水处理工艺的基础上综合论述了饮用水中有机污染物质深度处理技术.     

Applying partial correlation method to analyzing the correlation between ionospheric NmF2 and height of isobaric level in the lower atmosphere

On the basis of a multiple linear regression model performed for ionospheric NmF2, partial correlation method is first applied to investigating the relation between NmF2 and h (the height of isobaric level) in the lower atmosphere over Wuhan, China during 1957―2004. The results show that partial correlation method can eliminate the influences of solar and geomagnetic activities as well as the seasonal varia- tion factors and reveal the true correlation between NmF2 and h in the lower atmosphere. A weak posi- tive correlation between NmF2 and h is found in the middle stratosphere. In addition, by comparing the partial correlation coefficients between NmF2 and its influence factors, we find that NmF2 is mainly affected by solar activity and the seasonal variation factors, and weakly affected by geomagnetic ac- tivity, but hardly affected by h in the lower atmosphere. The study suggests that partial correlation method is a helpful tool for investigating the correlation between ionospheric parameter and its influ- ence factors.     

烟台市区大气中SO_2、NO_X及PM_(10)的时空分布规律研究

以2006—2007年烟台市区大气中SO2、NOX、PM10的监测数据为依据,分析了这3种大气污染物的时间、空间分布特征.结果表明:烟台市大气污染物浓度较低,空气质量较好.主要污染源为采暖排放、机动车排放与风沙影响.SO2、PM10污染呈明显的季节变化,SO2采暖季排放上升明显,PM10在春、秋的风沙时期保持较高的值.各污染物呈明显的区域性分布,SO2、PM10污染多集中在只楚工业区,NOX污染多集中在城市中心区域.     

持久性有机污染物的吸附研究进展

文章综述了活性炭、沸石、各种黏土矿和碳纳米管等多孔物质作为吸附剂处理水体中持久性有机污染物的研究进展,并对将来吸附材料的发展趋势做出预测.