نتایج جستجو برای: hourly analysis

تعداد نتایج: 2830884  

2004
XINXIAN ZHANG A. DAVID MCGUIRE ROGER W. RUESS

A major challenge confronting the scientific community is to understand both patterns of and controls over spatial and temporal variability of carbon exchange between boreal forest ecosystems and the atmosphere. An understanding of the sources of variability of carbon processes at fine scales and how these contribute to uncertainties in estimating carbon fluxes is relevant to representing these...

Journal: :Marine pollution bulletin 2011
Andrew J Titmus K David Hyrenbach

While many surface foraging seabirds ingest plastic, the spatial overlap of these far-ranging predators with debris aggregations at-sea is poorly understood. We surveyed concurrent distributions of marine birds and debris along a 4400 km cruise track within a debris accumulation area in the North East Pacific Ocean using line and strip transect methods. Analysis of debris and bird distributions...

2017
Stephen Blenkinsop Elizabeth Lewis Steven C. Chan Hayley J. Fowler

Sub-daily rainfall extremes may be associated with flash flooding, particularly in urban areas but, compared with extremes on daily timescales, have been relatively little studied in many regions. This paper describes a new, hourly rainfall dataset for the UK based on ∼1600 rain gauges from three different data sources. This includes tipping bucket rain gauge data from the UK Environment Agency...

Journal: :Environmental Modelling and Software 2014
Ann Kretzschmar Wlodek Tych Nick A. Chappell

A novel solution to the estimation of catchment rainfall at a sub-hourly resolution from measured streamflow is introduced and evaluated for two basins with markedly different flow pathways and rainfall regimes. It combines a continuous-time transfer function model with regularised derivative estimates obtained using a recursive method with capacity for handling missing data. The method has gen...

2009
Qingrong Liu

In this paper, in order to investigate the effects of photovoltaic system introduction to detached houses in Japan, two kinds of works were done. Firstly, the hourly generation amount of a 4.2kW photovoltaic system were simulated in 46 cities to investigate the potential of the system in different regions in Japan using a simulation model of photovoltaic system. Secondly, based on the simulated...

2001
Ernst Müller

The application of building simulation for the thermal improvement of buildings in developing countries is limited by the scarcity of hourly climate data and test reference years. Therefore a generally applicable method was developed to select and combine monthly periods of hourly data, that correspond best to long-time mean values and assure representative mean temperatures and global radiatio...

2008
Yiping Dou

This paper presents a dynamic linear model for modeling hourly ozone concentrations over the eastern United States. That model, which is developed within an Bayesian hierarchical framework, inherits the important feature of such models that its coefficients, treated as states of the process, can change with time. Thus the model includes a time–varying site invariant mean field as well as time v...

Journal: :The Journal of antimicrobial chemotherapy 1996
A Shah J Lettieri R Blum S Millikin D Sica A H Heller

The pharmacokinetics of intravenous ciprofloxacin and its metabolites were characterized in 42 subjects with various degrees of renal function (group 1, Clcr (mL/min/1.73 m2) > 90, n = 10; group 2, Clcr 61-90, n = 11; group 3, Clcr 31-60, n = 11; group 4, Clcr < or = 30, n = 10). The dosage regimens were-groups 1 and 2: 400 mg i.v. at 8 hourly intervals; group 3: 400 mg i.v. at 12 hourly interv...

2010
J. J. Love V. C. Tsai J. L. Gannon

A time and frequency-domain analysis is made of the effects of averaging and sampling methods used for constructing magnetic-observatory hourly data values. Using 1min data as a proxy for continuous, geomagnetic variation, we construct synthetic hourly values of two standard types: instantaneous “spot” measurements and simple 1-h “boxcar” averages. We compare these average-sample types with oth...

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