Both water balance (WB) and rating curve (RC) are methods for estimating streamflow. The first is mostly used to estimate reservoir outflows, while the second is usually adopted in hydrometeorological network streamflow gauges. While WB uses hourly collected data, the RC estimates streamflow using current water level and extrapolation techniques. The objective of this study was to analyze variations in the reservoir’s hourly outflow at Queimado Hydroelectric Power Plant (HPP Queimado) and to propose a method to evaluate whether the estimate of the daily outflows, obtained by the WB method, is similar to the flow values obtained at a conventional station. The logistic regression (LR) model was used because it is a method that adopts binary, categorically dependent variables to identify the event of interest. The results showed that the values of streamflow, obtained from an average of two daily readings, were a good representation of the flows in the region. The LR was able to identify atypical data, especially in the rainy season. This means that data consistency analysis can be faster and safer, when adequately employed and considering the proposed conditions, contributing to both management policies and the management of water resources.
数字版权管理(Digital Rights Management,DRM)中的家庭域管理使得属于同一个域的多个DRM设备可以共享DRM内容,为保证域内共享内容的安全,并实现对域以及域内设备的管理,需要建立一套完整、安全的域管理方案.本文基于OMA DRM标准,设计一套完整的域管理方案,提出入域审核机制和域内角色访问控制机制,增强了域管理的安全性. 相似文献
This review covers H-H bond cleavage of dihydrogen(H_2) mediated by structurally well-defined rareearth metal(scandium,yttrium and lanthanides) complexes,and their applications in homogenous catalysis,such as catalytic hydrogenation of unsaturated organic molecules.Depending on the mechanism of the H-H bond cleavage,this review is organized in two parts:(1) σ-bond metathesis,and(2)non-σ-metathesis H_2 activation.The latter is a new trend in this research field and is the emphasis of this review.Converting H_2 into inorganic rare-earth polyhydride complexes,albeit their potential applications as hydrogen-storage materiel,is not in the scope of this review. 相似文献
For the determination of electron temperature in plasma, this paper presents a method to measure the deionized period by optical
attenuation during afterglow. The apparatus was a tube filled to 1 mmHg helium with a probe for comparison. The results agreed
with the values measured by the probe. Due to using plasma radiation, one need not worry that the discharge space would be
disturbed and the probe would be contaminated by depositing discharge products, So it is a simple and convenient method. 相似文献