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Relevant bibliographies by topics / Improved Accumulation Area Ratio method

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Journal articles

Academic literature on the topic 'Improved Accumulation Area Ratio method'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Improved Accumulation Area Ratio method"

1

Yang, Shengying, Huibin Qin, Xiaolin Liang, and Thomas Gulliver. "An Improved Unauthorized Unmanned Aerial Vehicle Detection Algorithm Using Radiofrequency-Based Statistical Fingerprint Analysis." Sensors 19, no. 2 (2019): 274. http://dx.doi.org/10.3390/s19020274.

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Unmanned aerial vehicles (UAVs) are now readily available worldwide and users can easily fly them remotely using smart controllers. This has created the problem of keeping unauthorized UAVs away from private or sensitive areas where they can be a personal or public threat. This paper proposes an improved radio frequency (RF)-based method to detect UAVs. The clutter (interference) is eliminated using a background filtering method. Then singular value decomposition (SVD) and average filtering are used to reduce the noise and improve the signal to noise ratio (SNR). Spectrum accumulation (SA) and

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2

Ma, Qinghua, Lin Chen, Manyi Du, Yongan Zhang, and Yaoxiang Zhang. "Localized and Moderate Phosphorus Application Improves Plant Growth and Phosphorus Accumulation in Rosa multiflora Thunb. ex Murr. via Efficient Root System Development." Forests 11, no. 5 (2020): 570. http://dx.doi.org/10.3390/f11050570.

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Roots have high plasticity with the ability to adapt to heterogeneous nutrient distribution, but little is known about the effects of phosphorus (P) supply methods and levels on Rosa multiflora Thunb. ex Murr. root growth and nutrient accumulation. A pot study was conducted with two P supply methods (mixed and localized application) and three levels (P-deficient, P-moderate and P-adequate). The results showed that with localized application, P-deficient and P-moderate treatments significantly improved total root length, total surface area, total length of fine roots, shoot DW and total P accum

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3

Chatterjee, Kaushik, C. S. Singh, A. K. Singh, Ashok Kr Singh, and S. K. Singh. "Performance of wheat cultivars at varying fertility levels under system of wheat intensification and conventional method of wheat production system." Journal of Applied and Natural Science 8, no. 3 (2016): 1427–33. http://dx.doi.org/10.31018/jans.v8i3.977.

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A field experiment was conducted during rabi season of 2009-10 at Ranchi, Jharkhand to evaluate the performance of wheat cultivars at varying fertility levels under system of wheat intensification and conventional method of cultivation. The morpho-physiological analysis of growth and yield in wheat revealed that system of wheatintensification manifested higher total tillers m-2, leaf area index, dry matter accumulation, crop growth rate, number of spikes m-2, grains per spike and 1000-grain weight resulting in higher grain and straw yield over conventional method of cultivation. The net return

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4

He, Z. H., J. Parajka, F. Q. Tian, and G. Blöschl. "Estimating degree day factors from MODIS for snowmelt runoff modeling." Hydrology and Earth System Sciences Discussions 11, no. 7 (2014): 8697–735. http://dx.doi.org/10.5194/hessd-11-8697-2014.

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Abstract. Degree-day factors are widely used to estimate snowmelt runoff in operational hydrological models. Usually, they are calibrated on observed runoff, and sometimes on satellite snow cover data. In this paper, we propose a new method for estimating the snowmelt degree-day factor (DDFS) directly from MODIS snow covered area (SCA) and ground based snow depth data without calibration. Subcatchment snow volume is estimated by combining SCA and snow depths. Snow density is estimated as the ratio of observed precipitation and changes in the snow volume for days with snow accumulation. Finally

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5

He, Z. H., J. Parajka, F. Q. Tian, and G. Blöschl. "Estimating degree-day factors from MODIS for snowmelt runoff modeling." Hydrology and Earth System Sciences 18, no. 12 (2014): 4773–89. http://dx.doi.org/10.5194/hess-18-4773-2014.

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Abstract. Degree-day factors are widely used to estimate snowmelt runoff in operational hydrological models. Usually, they are calibrated on observed runoff, and sometimes on satellite snow cover data. In this paper, we propose a new method for estimating the snowmelt degree-day factor (DDFS) directly from MODIS snow covered area (SCA) and ground-based snow depth data without calibration. Subcatchment snow volume is estimated by combining SCA and snow depths. Snow density is estimated to be the ratio between observed precipitation and changes in the snow volume for days with snow accumulation.

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6

Zhu, Zijuan, Zengxiang Zhang, Lijun Zuo, et al. "Study on the Classification and Change Detection Methods of Drylands in Arid and Semi-Arid Regions." Remote Sensing 14, no. 5 (2022): 1256. http://dx.doi.org/10.3390/rs14051256.

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The aim of this study was to clarify the distribution of irrigated drylands in arid and semi-arid areas, where complex terrain, diverse crops and staggered cultivated lands exist. This paper studied the classification methods of irrigated drylands based on temperature, precipitation, Normalized Difference Vegetation Index (NDVI) and Normalized Difference Water Index (NDWI) from Landsat data in the one-harvest area of the northern Loess Plateau of China by using the Google Earth Engine (GEE) platform. An extraction method was proposed for irrigated drylands in arid and semi-arid regions of nort

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7

Wang, Zhi, Jiajia Zhou, Linjian Song, and Long Li. "Experimental Study of Low Cycle Fatigue Properties for Epoxy Resins with Dibutyl Phthalate (Dbp)." Archives of Civil Engineering 64, no. 2 (2018): 147–59. http://dx.doi.org/10.2478/ace-2018-0021.

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AbstractIn order to improve the toughness of traditional epoxy resin, dibutyl phthalate (DBP) was introduced into the epoxy resin. The static mechanical performance of plasticized and unplasticized epoxy resin was evaluated. The test results showed that the DBP modified epoxy resin can obtain a higher toughness than conventional epoxy resin, but the elastic modulus and the tensile strength were slightly reduced. The low cycle fatigue test results indicated that the stress ratio and the stress level were two critical factors of fatigue life, which was increased with the growth of stress ratio.

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8

Tawde, Sayli Atul, Anil V. Kulkarni, and Govindasamy Bala. "An estimate of glacier mass balance for the Chandra basin, western Himalaya, for the period 1984–2012." Annals of Glaciology 58, no. 75pt2 (2017): 99–109. http://dx.doi.org/10.1017/aog.2017.18.

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ABSTRACTAn improved understanding of fresh water stored in the Himalaya is crucial for water resource management in South Asia and can be inferred from glacier mass-balance estimates. However, field investigations in the rugged Himalaya are limited to a few individual glaciers and short duration. Therefore, we have recently developed an approach that combines satellite-derived snowlines, a temperature-index melt model and the accumulation-area ratio method to estimate annual mass balance of glaciers at basin scale and for a long period. In this investigation, the mass balance of 146 glaciers i

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9

Sun, Yongshuai, Xinyan Zhong, Jianguo Lv, and Guihe Wang. "Experimental Study on Silt Soil Improved by Microbial Solidification with the Use of Lignin." Microorganisms 11, no. 2 (2023): 281. http://dx.doi.org/10.3390/microorganisms11020281.

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At present, in the field of geotechnical engineering and agricultural production, with increasingly serious pollution an environmentally friendly and efficient means is urgently needed to improve the soil mass. This paper mainly studied the microbial induced calcium carbonate precipitation (MICP) technology and the combined effect of MICP technology and lignin on the improvement of silt in the Beijing area. Through unconfined compressive strength and dynamic triaxial test methods, samples improved by microorganisms were studied to obtain the optimal values of cement concentration and lignin un

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10

Yao, Lili, Qing Wang, Jinbo Yang, et al. "UAV-Borne Dual-Band Sensor Method for Monitoring Physiological Crop Status." Sensors 19, no. 4 (2019): 816. http://dx.doi.org/10.3390/s19040816.

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Unmanned aerial vehicles (UAVs) equipped with dual-band crop-growth sensors can achieve high-throughput acquisition of crop-growth information. However, the downwash airflow field of the UAV disturbs the crop canopy during sensor measurements. To resolve this issue, we used computational fluid dynamics (CFD), numerical simulation, and three-dimensional airflow field testers to study the UAV-borne multispectral-sensor method for monitoring crop growth. The results show that when the flying height of the UAV is 1 m from the crop canopy, the generated airflow field on the surface of the crop cano

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