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Jiangtao Ji, Xiaofei Wang, Hao Ma, Fengxun Zheng, Yi Shi, Hongwei Cui and Shaoshuai Zhao
Chlorophyll a and b content (Cab) and leaf area index (LAI) are two key parameters of crops, and their quantitative inversions are important for growth monitoring and the field management of wheat. However, due to the close correlation between the spectr...
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Yang Chen, Kexin Liu, Sijun Jiang, Yiqun Sun and Hui Chen
The system differential response method for inverse estimation has received much attention in the hydrology literature. However, its underlying mechanisms remain largely unexplored, highlighting the need for this study. This study proposes the relation d...
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Daniele Sampietro and Martina Capponi
The bathymetry is the most superficial layer of the Earth?s crust on which it is possible to perform direct measurements. However, it is also well known that water covers more than 70% of the Earth?s surface, so an enormous expenditure of acquisition cam...
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Fedor Krasnov,Alexander Butorin
Pág. 42 - 49
This article proposes a method of estimating the dominant frequency of a wave field along a seismic trace, developed on the basis of the spectral inversion method. The basis of the proposed algorithm is the estimation of the dominant frequency from the r...
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Raúl Ulices Silva-Ávalos, Hugo Enrique Júnez-Ferreira, Julián González-Trinidad and Carlos Bautista-Capetillo
In Mexico, agriculture in semi-arid regions is highly dependent on groundwater resources, where most of the aquifers? characterization is a pending task. In particular, the depth to the basement is unknown for most of the Mexican territory. Hence, the de...
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Ernst Uzhansky, Omri Gadol, Guy Lang, Boris Katsnelson, Shelly Copel, Tom Kazaz and Yizhaq Makovsky
Seafloor geoacoustic properties are important in determining sound propagation in the marine environment, which broadly affects sub-sea activities. However, geoacoustic investigation of the deep seafloor, which is required by the recent expansion of deep...
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Xinping Wu, Minjie Xu, Guandong Gao, Baoshu Yin and Xianqing Lv
In this study, a triangular polynomial interpolation (TPI) scheme was developed to estimate the vertical eddy viscosity coefficient (VEVC) on the basis of the Ekman model with adjoint assimilation. In the twin experiments, the advantages and disadvantage...
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Doyin Pelemo-Daniels, Basil O. Nwafor and Robert R. Stewart
This article presents an in-depth study of CO2 injection monitoring in the Sleipner Field, focusing on the Utsira Formation. The research leverages advanced time-lapse inversion techniques and 4D seismic data analysis to enhance the accuracy of volume es...
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Dario Autovino, Vincenzo Alagna, Cristina Bondì and Massimo Iovino
Green roofs can be a valid solution for stormwater management in urban environments. The objective of this study was to develop a laboratory procedure for the hydraulic characterization of artificial substrates, used in the realization of green roofs, ba...
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Hongsi Gao, Xiaochun Zhang, Xiugui Wang and Yuhong Zeng
The assessment of crop water productivity (CWP) is of practical significance for improving regional agricultural water use efficiency and water conservation levels. The remote sensing method is a common method for estimating large scale CWP, and the asse...
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You Zeng, Tianlong Liang, Donglin Fan and Hongchang He
Chlorophyll a (Chla) is a crucial pigment in phytoplankton, playing a vital role in determining phytoplankton biomass and water nutrient status. However, in optically complex water bodies, Chla concentration is no longer the primary factor influencing re...
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Saeid Gharechelou, Ryutaro Tateishi, Josaphat Tetuko Sri Sumantyo and Brian Alan Johnson
Soil moisture is a critical component for Earth science studies, and Synthetic Aperture Radar (SAR) data have high potential for retrieving soil moisture using backscattering models. In this study, polarimetric SAR (PALSAR: Phased Array type L-band Synth...
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Daqiao Zhang, Xiaolong Zheng, Yangguang Xie and Xiaoxiang Hu
The controller design of hypersonic flight vehicles is a challenging task, especially when its flexible states are immeasurable. Unfortunately, the flexible states are difficult to measure directly. In this paper, an angular-accelerometer-based method fo...
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Yi-Bo Li, Ye Liu, Wei-Bo Nie and Xiao-Yi Ma
The accurate estimation of soil hydraulic parameters (?s, a, n, and Ks) of the van Genuchten?Mualem model has attracted considerable attention. In this study, we proposed a new two-step inversion method, which first estimated the hydraulic parameter ?s u...
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Liangtian Wan, Lutao Liu, Guangjie Han and Joel J. P. C. Rodrigues
Most direction-of-arrival (DOA) estimation approaches for conformal array suffer from high computational complexity, which cause high energy loss for the direction finding system. Thus, a low energy consumption DOA estimation algorithm for conformal arra...
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José Luis Infante
Los proyectos de inversión no simples sufren el efecto de Tasas Internas de Retorno Múlti-ples. El presente trabajo describe una metodología de elaboración propia para la estimación de la Tasa Interna de Retorno. A tal efecto, separa el flujo económico e...
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Xin Zhao, Zeyi Zhao, Fengnian Zhao, Jiangfan Liu, Zhaoyang Li, Xingpeng Wang and Yang Gao
Accurate nitrogen fertilizer management determines the yield and quality of fruit trees, but there is a lack of multispectral UAV-based nitrogen fertilizer monitoring technology for orchards. Therefore, in this study, a field experiment was conducted by ...
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Haoxuan Li, Zhenzhong Shen, Yiqing Sun, Yijun Wu, Liqun Xu, Yongkang Shu and Jiacheng Tan
Seepage is the primary cause of dam failures. Conducting regular seepage analysis for dams can effectively prevent accidents from occurring. Accurate and rapid determination of seepage parameters is a prerequisite for seepage calculation in hydraulic eng...
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Xinping Wu, Minjie Xu, Yanqiu Gao and Xianqing Lv
In this study, the time-varying wind stress drag coefficient in the Ekman model was inverted by the cubic spline interpolation scheme based on the adjoint method. Twin experiments were carried out to investigate the influences of several factors on inver...
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Shizhao Zhang and Shengchun Piao
In order to analyze the frequency periodicity characteristics of acoustic field interference and realize acoustic source ranging (ASR), the normal mode model is used to analyze the interference characteristics of the broadband acoustic field under the co...
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