scholarly journals Statistical Analysis of the Total Annual (Maximum, Minimum) Temperatures and Total Annual Evaporation for the Period 2011-2017 for the Governorates of Babil and Najaf

2019 ◽  
Vol 14 (7) ◽  
pp. 10098-10101
Author(s):  
Khawla Ali Abd Al-Hameed
Keyword(s):  
Statistical Analysis ◽  
Annual Maximum ◽  
Annual Evaporation ◽  
Maximum Minimum

scholarly journals Precipitation Regime and Temporal Changes in the Central Danubian Lowland Region

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Dana Halmova ◽  
Pavla Pekarova ◽  
Juraj Olbrimek ◽  
Pavol Miklanek ◽  
Jan Pekar
Keyword(s):  
Spectral Analysis ◽  
Statistical Analysis ◽  
Daily Precipitation ◽  
Point Of View ◽  
Annual Precipitation ◽  
Annual Maximum ◽  
Precipitation Regime ◽  
Initial Hypothesis ◽  
Frequency Curves

The aim of this paper is to investigate the statistical aspects of multiannual variability of precipitation at the Hurbanovo station, Slovakia, over 140 years (1872–2011). We compare the long-term variability of annual precipitation for Hurbanovo (Slovakia), Brno (Czech Republic), Vienna (Austria), and Mosonmagyarovar (Hungary) stations using autocorrelation and spectral analysis methods. From the long-term point of view, there is no consistent trend in the annual precipitation; only a multiannual variability has been detected. Consequently we identify changes in the distribution of annual maximum daily precipitation for Hurbanovo during different periods for winter-spring and summer-autumn seasons using histograms, empirical exceedance curves, and frequency curves of daily precipitation. Next, we calculate the periods of days without precipitation exceeding 29 days between 1872 and 2011. The longest period of days without precipitation was 83 days in 1947. The statistical analysis does not confirm our initial hypothesis that neither high daily precipitation (over 51.2 mm per day) nor long dry periods (more than 50 days without precipitation) would occur more frequently nowadays. We assume that the decrease in annual precipitation over the period 1942–2011 (compared to 1872–1941) is caused by the less frequent occurrence of daily precipitation between 0.4 and 25.6 mm.

scholarly journals Impact of Climate Change on Vegetation Cover at South Port Sudan Area

Climate ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 114 ◽  
Author(s):  
Pei Sun Loh ◽  
Hussien Ibrahim Mohammed Alnoor ◽  
Shuangyan He
Keyword(s):  
Climate Change ◽  
Vegetation Cover ◽  
Water Area ◽  
Vegetation Coverage ◽  
Annual Maximum ◽  
Potential Threat ◽  
Impact Of Climate Change ◽  
Year 2000 ◽  
The Impact ◽  
Maximum Minimum

Arid regions worldwide, for example, Sudan, are affected by climate change and susceptible to environmental deterioration. In this study, temperature and rainfall data from 1985 to 2015 obtained from the Sudan Meteorological Authority were compared with satellite images of vegetation coverage in southern Port Sudan. The objective of this study was to determine the impact of climate change on the vegetation cover in this area. Results showed significant increases in the annual maximum, minimum and average temperatures with time, and precipitation showed a slight but not significant decrease from 1985 to 2015. The rates of increase for the annual maximum, minimum and average temperatures were 0.08 °C/year, 0.03 °C/year and 0.06 °C/year, respectively, and precipitation decreased at a rate of 0.12 mm/year. Higher shrub abundance and greater water area in 2013, 1995 and 1990 were probably due to high rainfall in the years preceding these years. Decreased shrub abundance in the year 2000 could be due to the significantly higher temperatures after 1998. There was no decreasing trend in shrub coverage from 1985 to 2015, but the overall increase in temperature and decrease in precipitation from 1985 to 2015 indicate a potential threat to vegetation in this area in the future.

scholarly journals Statistical analysis of annual maximum daily rainfall for Nelspruit and its environs

2018 ◽  
Vol 10 (1) ◽  
Author(s):  
Eric M. Masereka ◽  
George M. Ochieng ◽  
Jacques Snyman
Keyword(s):  
Statistical Analysis ◽  
Probability Distribution ◽  
Daily Rainfall ◽  
Distribution Functions ◽  
Flood Hazards ◽  
Annual Maximum ◽  
Probability Distribution Functions ◽  
Flood Disasters ◽  
Annual Maximum Daily Rainfall ◽  
Maximum Daily Rainfall

Nelspruit and its environs frequently experience extreme high annual maximum daily rainfall (AMDR) events resulting in flood hazards. These flood hazards have caused flood disasters that have resulted in loss of property and lives. The main objective of this study was to carry out statistical analysis of extreme high AMDR events that have caused flood hazards, which in turn have caused flood disasters in Nelspruit and its environs. Empirical continuous probability distribution functions (ECPDF) and theoretical continuous probability distribution functions (TCPDF) were applied to carry out the statistical analysis of the extreme high AMDR events. Annual maximum daily rainfall event of magnitude 100 mm was identified as a threshold. Events > 100 mm were considered as extreme high events resulting in flood disasters. The results of empirical frequency analysis showed that the return period of flood disasters was 10 years. The occurrence probability of flood disaster event at least once in 1, 2, 3, 4 and 5 years was 0.10, 0.19, 0.27, 0.34 and 0.41, respectively. Generalised logistic PDF was identified as the best-fit theoretical PDF for statistical analysis of the extreme high AMDR events in Nelspruit and its environs. The results of this study contributed to the understanding of frequency and magnitude of extreme high AMDR events that could lead to flood disasters. The results could be applied in developing flood disaster management strategies in Nelspruit and its environs.

scholarly journals Análisis global de la dinámica del sistema de bicicletas compartidas de la Ciudad de Medellín "EnCicla"

2021 ◽  
Vol 9 (18) ◽  
pp. 34-46
Author(s):  
Daniel Soto Forero ◽  
Alexis Rodriguez
Keyword(s):  
Statistical Analysis ◽  
Patterns Of Behavior ◽  
Operating Policies ◽  
The City ◽  
Maximum Minimum

In this article we analyze the BSS of the city of Medellin - Colombia called “EnCicla”. The objective is to know the overall behavior of the system to be able to identify the most used hours, the most used stations and the types of behavior that occur. Data on the operation of the system has been collected, with which processing and analysis has been carried out categorized by location and time slots. With the data collected and the statistical analysis performed identified the critical stations within the system, the patterns of behavior of each of them, the peak hours, the maximum, minimum and variability of occupancy on average; which generates the challenge to model, simulate and improve the functioning of the system, as well as evaluating operating policies and its implementation.

Statistical analysis of classification

1966 ◽  
Vol 24 ◽  
pp. 188-189
Author(s):  
T. J. Deeming
Keyword(s):  
Multivariate Analysis ◽  
Statistical Analysis ◽  
Classification Scheme ◽  
Analytical Procedure ◽  
Narrow Band ◽  
Scientific Research ◽  
Maximum Amount ◽  
Amount Of Information

If we make a set of measurements, such as narrow-band or multicolour photo-electric measurements, which are designed to improve a scheme of classification, and in particular if they are designed to extend the number of dimensions of classification, i.e. the number of classification parameters, then some important problems of analytical procedure arise. First, it is important not to reproduce the errors of the classification scheme which we are trying to improve. Second, when trying to extend the number of dimensions of classification we have little or nothing with which to test the validity of the new parameters.Problems similar to these have occurred in other areas of scientific research (notably psychology and education) and the branch of Statistics called Multivariate Analysis has been developed to deal with them. The techniques of this subject are largely unknown to astronomers, but, if carefully applied, they should at the very least ensure that the astronomer gets the maximum amount of information out of his data and does not waste his time looking for information which is not there. More optimistically, these techniques are potentially capable of indicating the number of classification parameters necessary and giving specific formulas for computing them, as well as pinpointing those particular measurements which are most crucial for determining the classification parameters.

Quantitative parallel EELS spectrum imaging developed as a new tool in AEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1202-1203
Author(s):  
Gianluigi Botton ◽  
Gilles L'espérance
Keyword(s):  
Statistical Analysis ◽  
Spatial Resolution ◽  
Personal Computer ◽  
Systematic Study ◽  
Present Author ◽  
Chemical Elements ◽  
Detection Limits ◽  
Research Groups ◽  
Quantitative Performance ◽  
Spectrum Imaging

As interest for parallel EELS spectrum imaging grows in laboratories equipped with commercial spectrometers, different approaches were used in recent years by a few research groups in the development of the technique of spectrum imaging as reported in the literature. Either by controlling, with a personal computer both the microsope and the spectrometer or using more powerful workstations interfaced to conventional multichannel analysers with commercially available programs to control the microscope and the spectrometer, spectrum images can now be obtained. Work on the limits of the technique, in terms of the quantitative performance was reported, however, by the present author where a systematic study of artifacts detection limits, statistical errors as a function of desired spatial resolution and range of chemical elements to be studied in a map was carried out The aim of the present paper is to show an application of quantitative parallel EELS spectrum imaging where statistical analysis is performed at each pixel and interpretation is carried out using criteria established from the statistical analysis and variations in composition are analyzed with the help of information retreived from t/γ maps so that artifacts are avoided.

Sign in / Sign up

Export Citation Format

Share Document