Research on Prediction Analysis Method about the Taxi Demand of Tourist City with Seasonal Fluctuation

2013 ◽  
Vol 361-363 ◽  
pp. 2025-2029 ◽  
Author(s):  
Yan Li Jiao ◽  
Meng Ge
Keyword(s):  
Seasonal Changes ◽  
Supply And Demand ◽  
Seasonal Fluctuation ◽  
Balance Method ◽  
Ratio Method ◽  
Analysis Method ◽  
Seasonal Fluctuations ◽  
Prediction Analysis ◽  
Advantages And Disadvantages

The determination of taxi demand in tourist city is affected by seasonal changes. It presents peaks and troughs so it is difficult to be predicted. On the basis of analyzing the advantages and disadvantages of existing forecast methods, this paper puts forward modified supply and demand balance method and ratio method to forecast taxi demand and then discusses the methods of dealing with seasonal fluctuations.

Spectroscopic Determination of Aspirin and Omeprazole by Absorbance Ratio and Multicomponent Mode Method

2017 ◽  
Vol 10 (6) ◽  
pp. 3900-3905
Author(s):  
Hajera Khan ◽  
Swapna S Bandewar ◽  
Mohammad Zameeruddin ◽  
Vishvanath B Bharkad
Keyword(s):  
Accurate Method ◽  
Analysis Data ◽  
Spectroscopic Determination ◽  
Ratio Method ◽  
Analysis Method ◽  
Isobestic Point ◽  
Absorbance Ratio ◽  
Ich Guidelines ◽  
Mode Method

Here we describe a simple, rapid and accurate method for simultaneous assay of aspirin and omeprazole. The first method was Absorbance ratio method (Method 1) and second method was multi component mode method of analysis (Method 2).  Methanol: water (8:2) was used as solvent for both methods, using 293 nm as isobestic point for absorbance ratio method. The wavelength ranges 275.80 nm for aspirin and 302.20 nm for omeprazole for method 2, which represents the absorbance maxima of both drugs respectively. Beer’s law was applied in the concentration ranges of 2-14μg/mL and 2-18 μg/mL for aspirin and omeprazole, respectively, in absorbance ratio methods. The percentage assay was found to be in the range 99.74 to 100 % for aspirin and 99.69 to 99.9 % for omeprazole for both the methods. Recovery was found in the range of 99.74 –100.14 % for aspirin and omeprazole for both methods. The analysis data has been validated statistically and recovery studies confirmed the accuracy and reproducibility of the proposed methods, which were carried out according to the ICH guidelines.     

Determination of Diffusion Coefficients with Quantitative X-Ray Microanalysis at High - Spatial Resolution

2012 ◽  
Vol 323-325 ◽  
pp. 61-67 ◽  
Author(s):  
Raynald Gauvin ◽  
Nicolas Brodusch ◽  
Pierre Michaud
Keyword(s):  
Diffusion Coefficient ◽  
Diffusion Coefficients ◽  
Beam Energy ◽  
High Spatial Resolution ◽  
Ratio Method ◽  
Concentration Profiles ◽  
X Ray ◽  
Advantages And Disadvantages ◽  
Scanning Electron

This paper present the determination of concentration profiles of an Mg Al diffusion couple that was obtained with a high resolution field emission scanning electron microscope, the Hitachi SU-8000 equipped with a SDD EDS detector. From these concentration profiles, the inter-diffusion coefficient is determined with the Boltzmann-Matano technique. The advantages and disadvantages of working at high and low beam energy for quantitative x-ray microanalysis are highlighted. The f ratio method is used in this work to convert the x-ray intensities into composition.

scholarly journals Seasonal fluctuations in the advance of a tidewater glacier and potential causes: Hubbard Glacier, Alaska, USA

2008 ◽  
Vol 54 (186) ◽  
pp. 401-411 ◽  
Author(s):  
J. Brent Ritchie ◽  
Craig S. Lingle ◽  
Roman J. Motyka ◽  
Martin Truffer
Keyword(s):  
Satellite Imagery ◽  
Seasonal Changes ◽  
Sea Water ◽  
Seasonal Fluctuation ◽  
Narrow Gap ◽  
Seasonal Fluctuations ◽  
Time Period ◽  
Tidewater Glacier ◽  
Forcing Mechanisms ◽  
Surface Ice

AbstractSatellite imagery has been used to acquire seasonal terminus positions of tidewater Hubbard Glacier, Alaska, USA, from 1992 to 2006. During this 15 year time period, the width-averaged advance of the entire terminus has been ∼620 m at a mean rate of 35 m a−1. Seasonal fluctuation of the terminus ranges from 150 to 200 m on average and varies spatially. A section of the terminus, near a narrow gap where the glacier has now twice closed off 40 km long Russell Fiord, exhibited little to no mean advance during this time period but displayed seasonal fluctuations of 300–500 m. Seasonal variability in surface ice speeds and surface sea-water temperatures was also observed; both are potential forcing mechanisms for terminus fluctuations. Seasonal changes in sea-water temperature of 10–12°C, as well as seasonal changes in subglacial freshwater discharge, are inferred to influence calving and submarine melting at the terminus, driving seasonal variations. Displacements of the medial moraine separating Hubbard and Valerie Glaciers at the terminus suggest surge-like pulses of the latter, with a periodicity of several years. The timing of these pulses suggests they may influence the Hubbard terminus near Gilbert Point and have implications for future closures of Russell Fiord.

Groundwater Hydrograph Patterns in North China Plain during 1982-1986 Interpreted Using Principal Component Analysis

2011 ◽  
Vol 356-360 ◽  
pp. 2320-2324
Author(s):  
Rui Gang Zhang
Keyword(s):  
Principal Component Analysis ◽  
North China Plain ◽  
North China ◽  
Seasonal Fluctuation ◽  
Principal Component ◽  
Component Analysis ◽  
Analysis Method ◽  
Seasonal Fluctuations ◽  
Increasing Trend ◽  
Taihang Mountain

The groundwater table depths from 1982 to 1986 of 58 unconfined wells in North China Plain(NCP) were analyzed using principal component analysis method. Results showed there were mainly three hydrograph patterns over the area: increasing trend with steady moderate seasonal fluctuations in Taihang Mountain piedmont area; decreasing trend with large seasonal fluctuation magnitudes in central plain of NCP; increasing-decreasing trend with large variance of fluctuation magnitude in piedmont of Yan Mountain piedmont.The distribution of precipitation, irrigating abstraction, and water table depths were the main factors determining the hydrograph patterns and their distribution.

Extractive Spectrophotometric Method for the Determination of Glibenclamide by Ion-Pair Complex in Pure Form and Pharmaceutical Formulation

2019 ◽  
Vol 9 (o3) ◽  
Author(s):  
RUAA MUAYAD MAHMOOD ◽  
HAMSA MUNAM YASSEN ◽  
SAMAR , NAJWA ISSAC ABDULLA AHMED DARWEESH ◽  
NAJWA ISSAC ABDULLA
Keyword(s):  
Spectrophotometric Method ◽  
Molar Absorptivity ◽  
Ion Pair ◽  
Pharmaceutical Formulation ◽  
Ratio Method ◽  
Colored Complex ◽  
Colored Product ◽  
Method Of Continuous Variation ◽  
Job's Method

Simple, rapid and sensitive extractive spectrophotometric method is presented for the determination of glibenclamide (Glb) based on the formation of ion-pair complex between the Glb and anionic dye, methyl orange (MO) at pH 4. The yellow colored complex formed was quantitatively extracted into dichloromethane and measured at 426 nm. The colored product obeyed Beer’s law in the concentration range of (0.5-40) μg.ml-1. The value of molar absorptivity obtained from Beer’s data was found to be 31122 L.mol-1.cm-1, Sandell’s sensitivity value was calculated to be 0.0159 μg.cm-2, while the limits of detection (LOD) and quantification (LOQ) were found to be 0.1086 and 0.3292 μg.ml-1, respectively. The stoichiometry of the complex created between the Glb and MO was 1:1 as determined via Job’s method of continuous variation and mole ratio method. The method was successfully applied for the analysis of pharmaceutical formulation.

Adaptive changes of the hair coat of the horses of zabaykalsky aborigenous breed

2019 ◽  
Vol 49 (4) ◽  
pp. 101-105 ◽  
Author(s):  
G. M. Shkyratova ◽  
B. Z. Bazaron ◽  
T. N. Khamiruev ◽  
S. M. Dashinimaev
Keyword(s):  
Seasonal Changes ◽  
Climatic Conditions ◽  
Skin Thickness ◽  
Summer Period ◽  
Hair Coat ◽  
Skin Fold ◽  
Winter Grazing ◽  
Shoulder Blade ◽  
Quantitative Indicators

The seasonal changes in the skin thickness and structure of the horses’ coat, as signs of adaptation to environmental factors, were studied. The experiment was carried out with the livestock kept in a herd using winter-grazing technology without additional feedings in the climatic conditions of the Trans-Baikal Territory. The objects of the research were adult mares of Zabaikalsky breed of horses of the same age, class and fatness. The studies were carried out in the middle of each season (May, July, October, February). The length of the coat was measured with a caliper, the coat itself with the determination of the ratio of hair (fl uffy hair, heterotype hair and coarse hair) and the thickness of the skin fold were measured in accordance with the approved methodological recommendations. The minimum skin thickness in winter was detected in mares on the back and shoulder blade – 4.3 and 4.4 mm, the maximum – on the side and thigh – 4.5 4.6 mm. When compared with the summer period, the increase on the side was 0.8 mm, whereas on the back, shoulder blade and thigh – 0.4 mm (p ≤ 0,001). In spring, thickening of the skin was noted within 0.1-0.3 mm in the same topographic areas, compared to autumn. The quantitative indicators of the coat changed depending on the season of the year. In winter, the coat contained more fl uffy hair (23.10%), and less coarse hair (68.24%), in summer there was a lower content of fl uffy hair (4.33%), but more coarse hair (94.01%.) Sharp seasonal changes were noted with regard to the length of the hair. The longest hair was found in winter and spring – 4.96 and 4.26 cm, whereas the shortest – in summer and autumn – 0.94 and 1.90 cm, respectively.

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