提高检测数据准确性 促进选钼生产稳定高效

本文从6个方面对选钼2个作业段的取样方式进行了校验,通过对检测数据的比对分析,找出了选钼2个作业段数据存在矛盾的原因,并针对原因采取了有效的措施,保证了检测数据的准确性,促进了选钼生产的稳定高效。     

视频概要的分类与综合评价方法*

针对视频摘要产生过程,从结果、信息源、特征化级别和粒度四个方面,提出了一种分类方法,给出了若干实例进行综合评价,侧重反映不同视频概要所处的技术层次与水平。在此基础上,分析了研究现状,给出了进一步研究的方向。     

Lakes in the Finnish Eurowaternet: status and trends

The Eurowaternet is a monitoring network designed to cover all European countries, with the overall objective of obtaining timely, quantitative and comparative information on the status of inland waters so that their key environmental problems can be defined, quantified and monitored. Finland launched the Eurowaternet for lakes in 2000. The network was set up according to guidelines of the European Environment Agency (EEA) and was based on national, regional and local monitoring programmes. It includes 253 lake sites, divided into the following groups by, for example, their loading background and size: (i) reference sites, (ii) point-source loading (impact) sites, (iii) agricultural sites, (iv) representative sites, i.e. lakes <100 km(2) with typical water quality in the catchment and (v) lake deep sites in large lakes (>100 km(2)). We examined the water quality and its development during 1976-2001 in these groups, using data from surface and near-bottom water layers at summer and winter stagnation. In addition, the representativeness of the network was evaluated. Summer mean concentrations of total P (TP) during 1990-2001 in surface water were (i) 6.8+/-1.8 microg 1(-1) in reference lakes, (ii) 24+/-5 microg 1(-1) in lakes affected by point loading, (iii) 58+/-32 microg l(-1) in agricultural lakes, (iv) 14+/-2.2 microg l(-1) in representative lakes and (v) 11+/-2.1 microg l(-1) in large lakes. Comparison with reference lakes revealed major impact of human activities on TP and total N (TN)-and consequently on chlorophyll a (a-chl) and transparency-in all other groups, especially agricultural lakes. Decreasing TP and increasing O(2) trends were found at impact sites, reflecting water protection measures taken in pulp and paper mills and municipalities. More surprisingly, we found increasing alkalinity trends in all but agricultural sites and decreasing NO(2)-N+NO(3)-N (NO(x)-N) trends particularly in pelagic areas of large lakes. Comparison of water quality in Eurowaternet lakes with those in randomly sampled lakes (Finnish Lake Survey) revealed that the Eurowaternet covers the entire range of concentrations of TP, TN and conductivity in Finnish lakes, but <1-km(2), eutrophic and/or brown water lakes are underrepresented. Only 0.2% of a total of 13114 small lakes (0.1-1 km(2)) are included in the annual monitoring program of the Eurowaternet.     

大亚湾地区三次环境γ辐射剂量率调查测量结果比较分析

由于相继建设广东大亚湾核电站(GNPS)和岭澳核电站(LAPS)，大亚湾地区自1988年至2000年先后进行了三次环境γ辐射剂量率调查。比较分析三次测量结果，大亚湾地区原野和室内的γ辐射水平总体上保持不变，道路的γ辐射水平则略有上升。本文还分析了不同时间特定区域γ辐射水平调查结果差异的原因，说明在环境γ辐射剂量率测量中，测点的代表性直接影响测量结果的可比性。     

冬期混凝土同条件试块检测方法的探讨

就同条件养护试块运用散热系数的原理解决同步代表性问题 ,提出一种新方法     

视频概要的分类与综合评价方法

针对视频摘要产生过程，从结果、信息源、特征化级别和粒度四个方面，提出了一种分类方法，给出了若干实例进行综合评价，侧重反映不同视频概要所处的技术层次与水平。在此基础上，分析了研究现状，给出了进一步研究的方向。     

正确采取煤芯煤样合理利用煤炭资源

阐述了煤芯煤样的代表性，煤质化验项目的合理选取及化验结果的审定，决定着勘探区煤炭资源的利用价值与正确评估。     

安全级仪控系统设备鉴定样机代表性分析

安全级仪控系统是核电站的中枢神经,是核电厂安全运行必不可少的系统设备.为了确定安全级仪控系统的可靠性和安全性,设备鉴定成为其主要技术手段.受成本和时间等因素限制,设备鉴定通常使用具有一定代表性的鉴定样机来完成相关试验.因此,核电厂安全级仪控系统鉴定样机的代表性是鉴定结论能否适用于工程产品的关键.NB/T 20344和I...     

Exploring perceptions of online sport commentary: A test of disposition effects hypothesis

This study aimed at examining whether exposure to the positive/negative commentaries on the win/loss of readers’ favorite team would activate their dispositions toward the favorite team and whether such disposition effects would lead reader’s perceptions of online sport commentary. A two (the win of favorite team versus the loss of favorite team) by two (the positive commentary versus the negative commentary) within-subjects repeated measures experiment examined readers’ perceptions in terms of quality, credibility, representativeness. Results showed that the positive/negative commentaries on readers’ favorite team would be a stronger factor influencing readers’ quality and credibility perceptions than the win/loss of readers’ favorite team. However, the positive/negative commentaries and the win/loss of the favorite team both did not lead readers’ representativeness perceptions.