Results 81 to 90 of about 5,511,845 (178)

Symmetric Tridiagonal Inverse Quadratic Eigenvalue Problems with Partial Eigendata [PDF]

, 2007
In this paper we concern the inverse problem of constructing the n-by-n real symmetric tridiagonal matrices C and K so that the monic quadratic pencil Q(¸) := ¸2I + ¸C + K (where I is the identity matrix) possesses the given partial eigendata.
白正简, Zheng-Jian Bai
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Legacy of non-ferrous metallurgy driving heavy metal-induced geochemical transformation of urban soils

Frontiers in Soil Science
IntroductionUrban soils in long-established mining and metallurgical cities represent persistent reservoirs of potentially toxic elements (PTEs), posing long-term ecological and human health risks. Ust-Kamenogorsk (Oskemen), one of Kazakhstan’s major non-
Dias Daurov, Zhanar Abilda, Zhanar Abilda, Kabyl Zhambakin, Ainash Daurova, Ainash Daurova, Zagipa Sapakhova, Zagipa Sapakhova, Maxat Toishimanov, Iskander Isgandarov, Almas Mukhametov, Rakhim Kanat, Rakhim Kanat, Murat Otynshiev, Dmitriy Volkov, Malika Shamekova, Malika Shamekova   +16 more
doaj   +1 more source

Accurate Inversion of Rice LAI Using UAV-Based Hyperspectral Data: Integrating Days After Transplanting and Meteorological Factors

Agriculture
The leaf area index (LAI) is a key physiological parameter characterizing rice canopy structure and growth status. To face the limits of traditional destructive sampling, which is time-consuming, labor-intensive, and difficult to achieve large-scale dynamic detection, this study proposes a precise UAV-based hyperspectral inversion method for rice LAI ...
Nan Wang, Shilong Li, Xin Qi, Meihan Liu, Jiayi Yang, Jiulin Zhou, Lihong Yu, Fenghua Yu, Chunling Chen, Yonghuan Wang   +9 more
openaire   +1 more source

Stochastic moving load identification driven by multi-point deflection responses: an AR(1)-Tikhonov-SVD framework and robustness verification

Advances in Bridge Engineering
In the field of bridge health monitoring, the accurate identification of moving loads is critical for structural safety assessment. To address the prevalent challenges in the existing methods, including improving the modeling of temporal correlations in ...
Jiaqiang Zhang, Yuefei Liu, Xueping Fan
doaj   +1 more source

Soluble urokinase receptor is a kidney-specific vasoconstrictorResearch in context

EBioMedicine
Summary: Background: Soluble urokinase plasminogen activator receptor (suPAR) is an innate immune system-derived risk factor for acute and chronic kidney diseases.
Sebastian Buhl Rasmussen, Rasmus Bo Lindhardt, Georgina Gyarmati, Kirsten Madsen, Claus Bistrup, Lars Lund, Sisse Rye Ostrowski, Changli Wei, Janos Peti-Peterdi, Per Svenningsen, Jochen Reiser, Hanne Berg Ravn   +11 more
doaj   +1 more source

The impact of dam management and rainfall patterns on flooding in the Niger Delta: using Sentinel-1 SAR data

Discover Water
This study explored how dam operation and rainfall patterns interact to influence flooding in the Niger Delta, Nigeria. This study utilizes Sentinel-1 Synthetic Aperture Radar (SAR) data to analyze the flood events from 2018 to 2022, focusing on key ...
Desmond Rowland Eteh, Francis Emeka Egobueze, Moses Paaru, Anslem Otutu, Ifunanya Osondu   +4 more
doaj   +1 more source

Gender-specific protective effects of dietary index for gut microbiota on cardiovascular disease: insights from NHANES 2007–2020

BMC Cardiovascular Disorders
Background Cardiovascular disease (CVD) represents a significant global health burden. The gut microbiome, as a potential regulatory factor, and its synergistic interaction with dietary patterns remains underexplored. The dietary index for gut microbiota
Hui Liu, Xin Xu, Ruoyan Wang, Jialu Kang, Yongqing Shen, Wei Liu   +5 more
doaj   +1 more source

Approaching topographic wetness index calculation by combining the triangular facet network with FPN approaching TWI calculation by combining the TFN with FPN

Open Geosciences
The topographic wetness index (TWI) is a common factor for describing the control of the relative soil moisture spatial distribution. However, the application accuracy of the TWI remains unfavorable. Thus, this study aimed to enhance the precision of the
Wu Qianjiao, Xie Lihang, Xie Huaming, Zhang Ting, Wu Jiadong, Xian Yuyang   +5 more
doaj   +1 more source

Inverse problems in mantle convection : models, algorithms, and applications [PDF]

, 2013
textMantle convection is the principal control on the thermal and geological evolution of the earth, including the motion of the tectonic plates, which in turn influences earthquakes, tsunamis, and volcanic eruptions.
Worthen, Jennifer Anne
core  

A LINEAR INVERSE DEMAND SYSTEM [PDF]

We present an inverse demand that can be estimated in a linear form. The model is derived from a specification of the distance function which is parametrically similar to the cost function underlying the Almost Ideal Demand System.
Vissa, Anuradha, Moschini, GianCarlo
core