MCAI资源管理的信息化

要实现培养创造力人才的目标,教育信息化是最有效途径之一,教育信息化要从资源(包括多媒体辅助教学资源)库整合、资源管理信息化(ERM)等多方面着手,并使它们协调运行才能有效推进教育信息化进程.整合MCAI资源库,建立资源管理信息化系统的实现流程,共建共享资源,快速推进教育信息化进程.     

建立适合我国国情的饮用水水质指数

目前一般利用各指标合格率评价饮用水水质，由于指标繁杂，不利于消费者了解水质整体概况，也不利于对外发布公报。本文建议采用水质指数法来对饮用水水质进行综合评价。本文介绍了目前采用的水质指数的不同评价方法，综述了不同的水质指数的原理和计算方法，根据我国国情，对我国城市供水的饮用水水质指数进行了修正，首次在水质指数中增加了超标项目“惩罚项”。修正后的饮用水水质指数具有很强的科学性和可操作性，可以从整体上对饮用水水质进行综合评价。     

城市大气污染综合治理规划方法

以北京市2008年三种主要大气污染物PM10、SO2及NOx环境空气质量达标方案的设计为案例，从城市大气污染综合治理规划方法学角度，提出并发展了一套包括环境空气质量的模拟、城市背景浓度的确定、优化模型、传输矩阵、分区规划、等效排放、措施信息库等方法在内的城市大气污染综合治理规划问题的整体解决的技术方案，为全国其它类似城市进行大气污染综合治理规划提供一种实例与参考，同时，研究的结果对北京市2008年大气污染控制对策的制定提供了科学的依据。     

KClO3对龙眼产期的调控效应

以自行配制、主要有效成份为KClO3的龙眼产期调控剂进行田间试验．结果表明：催花土壤施用剂量以每平方米树冠面积180g效果最佳；不同品种龙眼对药物的敏感程度不同，以石硖、储良龙眼最为敏感，平均抽花率可达80％以上．不同季节和不同梢期施药，龙眼抽花率存在显著差别；药剂干施回泥后淋水、干施淋水后回泥和拌水淋施这3种土壤给药方式的促花效果差异不显著；反季节与正造栽培收获的龙眼相比，果实质量存在一定差异，春季收获的果实个大肉厚，外观较佳，但糖份含量等品质指标则较差．KClO3调控龙眼产期的效果明显，配合相应的树体管理和土壤水分养分调控措施，可实现龙眼产期的人工合理控制．表7参20     

水质在线监测中的若干问题

以环境水质自动监测子站的采样和配水系统为切入点，针对不同环节上极易出现的问题，分别提出具体的解决方案。     

徐州市生态环境质量动态评价与整治研究

应用层次分析法，系统评价了徐州市1990－1999年间的生态环境质量状况，得出了该市生态环境质量在研究时段间总体上呈现出逐渐恶化的趋势等结论，从而可为政府等相关部门的决策提供必要的参考。     

铝对茶叶叶片主要化学成分的影响

以茶树2个品种(雁荡毛峰和知仁早茶)为研究材料,采用溶液培养法,研究了铝对茶叶叶片主要化学成分(茶多酚、咖啡碱、氨基酸和维生素C)的影响。结果表明,水培下,10～100mg·L-1质量浓度的铝可显著提高茶多酚的质量分数,与对照相比,50mg·L-1质量浓度下雁荡毛峰茶多酚的质量分数提高了180%,知仁早茶提高了100.6%;10～50mg·L-1质量浓度的铝可提高咖啡碱、氨基酸的质量分数,但100mg·L-1质量浓度下显著降低了咖啡碱和氨基酸的质量分数,雁荡毛峰降低了5.3%、25.8%,知仁早茶降低了2%、7.2%;不同质量浓度的铝对维生素C的质量分数影响不大;低质量浓度的铝处理降低茶树的丙二醛质量分数,而高质量浓度的铝处理(100mg·L-1)提高了丙二醛质量分数。结果证明水培条件下,10～50mg·L-1铝可明显提高茶叶品质,100mg·L-1质量浓度会降低茶叶品质。     

昆明地区土壤重金属与农药残留分析

对昆明地区土壤中Cd、Cu、Pb、As、Cr、Hg6种重金属和六六六、DDT、甲胺磷、乐果4种农药含量进行了调查监测,并就其来源及污染状况进行了评价,结果表明:Cd、Cu、As、Hg等重金属对土壤均存在不同程度的污染,其中Cd污染最为严重,其后依次为Cu、Hg、As、Pb、Cr,土壤重金属综合评价为中度污染,土壤有机氯农药仍有部分残留,有机磷农药残留量很低。     

Pitch shifts and song structure indicate male quality in the dawn chorus of black-capped chickadees

The fee-bee song of male black-capped chickadees (Poecile atricapillus) is considered a single-type song that singers transpose up and down a continuous frequency range. While the ability to shift song pitch in this species provides a mechanism for song matching as an aversive signal in male-male territorial song contests, the functional significance of this behaviour during the solo performances of males during the dawn chorus is unclear. We analysed the dawn chorus songs and singing behaviour of males whose winter-flock dominance status we determined. We used correlation analysis to show that pitch shifts were accompanied by changes to other fine structural characteristics in song, including temporal and relative amplitude parameters. We also found that songs of socially dominant males and songs of their most subordinate flockmates could be distinguished using these methods by the way they performed a between-note frequency measure accompanying pitch shifts. That is, a ratio measure of the internote frequency interval remained constant for songs of high-ranking birds despite changes in absolute pitch, while low-ranking males sang a smaller ratio as they shifted to higher absolute pitches. These findings identify previously unrecognised variation in the songs of black-capped chickadees. More importantly, they indicate a mechanism by which pitch shifting during the dawn chorus of black-capped chickadees could provide a reliable indicator of relative male quality.Communicated by I. Hartley     

Baboon loud calls advertise male quality: acoustic features and their relation to rank,age, and exhaustion

Free-ranging adult male baboons give loud two-syllable wahoo calls during dawn choruses, interactions between groups, when chasing females, and in aggressive interactions with other males. Previous research has shown that the rate and duration of these contest wahoos are correlated with a males competitive ability: high-ranking males call more often, call at faster rates, and call for longer bouts than do low-ranking males. Here we report that acoustic features of wahoos also reveal information about male competitive ability. High-ranking males give wahoos with higher fundamental frequencies (F0) and longer hoo syllables. Within-subject analyses revealed that, as males fall in rank, the hoo syllables tend to shorten within a period of months. As males age and continue to fall in rank, F0 declines, hoo syllables shorten, and formant dispersion decreases. Independent of age and rank, within bouts of calling F0 declines and hoo syllables become shorter. Because wahoos are often given while males are running or leaping through trees, variation in these acoustic features may function as an indicator of a males stamina. The acoustic features of contest wahoos thus potentially allow listeners to assess a males competitive ability.Communicated by C. Nunn