8,594 Results Found

In this paper, a new modified roller coaster surface according to a modified orthogonal frame is investigated in Euclidean 3-space. In this method, a new modified roller coaster surface is modeled. Both the Gaussian curvature and mean curvature of ro...

The space environment is characterized by unstructured features, sparsity, and poor lighting conditions. The difficulty in extracting features from the visual frontend of traditional SLAM methods results in poor localization and time-consuming issues...

We consider a new kind of helicoidal surface for natural numbers $(m,n)$ in the three-dimensional Euclidean space. We study a helicoidal surface of value $(m,n)$ , which is locally isometric to a rotational surface of value $(m$...

Gradually increasing power transmission voltage requires an improved high-voltage capability of polymeric insulating materials. Surface modification emerges as an easily accessible approach in enhancing breakdown and flashover performances due to the...

This work investigates the effects of the surface errors of the satellite antenna on the detection performance of the space VLBI system. First, the relationship between the surface errors and the antenna gain loss is analyzed, and then the influence...

The biomimetic surface with Space-V grooves can effectively reduce flow resistance and noise. Our investigation was in order to further enhance the drag reduction and noise reduction performance of a marine centrifugal pump with Space-V-groove-shaped...

The rapid increase of impervious surfaces and the dense development that accompanies urban growth has reduced the amount of green space in urban landscapes and increased urban surface temperatures. Accordingly, the greening of urban spaces has been p...

The present study focuses on the examination of the propagation of plane surface waves on a coated half-space, which is accompanied by the magnetic field force, and the normal mechanical loading, due to Winkler’s elastic foundation. The study i...

Considering the Weierstrass data as $(\psi ,f,g)=(2,1-z^{-m},z^n)$ , we introduce a two-parameter family of Henneberg-type minimal surface that we call ${\mathfrak{H}}_{m,n}$ for positive integers $(m,n)$ by using t...

This study investigates a typical valley city, Lanzhou, China, to reveal the nonlinear relationships and interaction mechanisms between gray–green space morphology and seasonal diurnal land surface temperature (LST) using multi-source remote se...

Urban green space (UGS) has been recognized as a key factor in enhancing the urban ecosystem balance, particularly in arid areas. It is often considered an effective means to mitigate the urban heat island (UHI) effect. In this study, the reference c...

Soil and vegetation component temperatures in non-isothermal pixels encapsulate more physical meaning and are more applicable than composite temperatures. The component temperatures however are difficult to be obtained from thermal infrared (TIR) rem...

Accurate estimation of soil surface moisture (SSM) is essential for various applications, including hydrological modeling, precision agriculture, and drought monitoring. With advancements in SAR data acquisition and modeling techniques, accurate retr...

The present manuscript focuses on the study of surface wave propagation in a rotating coated viscoelastic half-space and its response to external forces comprised of the magnetic field and gravitational forces. A celebrated normal mode analysis proce...

In this work, we further investigate the surface wave attenuation performance of elastic metasurfaces composed of in-filled pipes in a layered half-space, focusing on the dispersion relations and transmission properties. Particularly, both Rayleigh w...

Increasing trends of urbanization lead to vegetation degradation in big cities and affect the urban thermal environment. This study investigated (1) the cooling effect of urban green space spatial patterns on Land Surface Temperature (LST); (2) how t...

Estimating multiscale ocean-surface states from sparse observations is challenging because the state is high-dimensional, sampling is irregular, and posterior distributions can be strongly non-Gaussian. We develop Latent-LWETKF, a structured latent-s...

The two most common land cover types in urban areas, artificial surface (AS) and urban blue-green space (UBGS), interact with land surface temperature (LST) and exhibit competitive effects, namely, heating and cooling effects. Understanding the varia...

Urban green spaces (UGSs) are crucial for mitigating land surface temperature (LST) in the context of climate change and extremely high temperatures. Although numerous studies have explored the impact of UGSs on the LST, a systematic understanding of...

Urban green space (UGS) can be regarded as an effective approach to mitigate urban heat island (UHI) effects. Many studies have investigated the impacts of composition and configuration of UGS on land surface temperature (LST), while little attention...

We present a flexible, centimeter-scale 4 × 4 macro mirror array serving as an intelligent reflecting surface (IRS) for free-space optical communication (FSOC) links in urban environments. The realized array integrates a compact, high-precision...

Accurate and scalable extraction of geomorphic features from LiDAR-derived terrain data is important for environmental monitoring, land use planning, and geohazard assessment. Recent deep learning advances have introduced state-space models, such as...

Ku-band scatterometers lose extensive Sea Surface Vector Wind (SSVW) observations under extreme winds, heavy precipitation, or instrument anomalies, degrading forecast and assimilation skill. Traditional interpolation fails to reconstruct non-linear...

Canal surfaces are defined and divided into nine types in Minkowski 3-space ${\mathbb{E}}_1^3$ , which are obtained as the envelope of a family of pseudospheres ${\mathbb{S}}_1^2$ , pseudohyperbolic spheres ${\mathbb{H}}_0^2$ , or lightlike cones ${\mathbb{Q}}^2$ , wh...

In the present paper, we study helicoidal surfaces in the three-dimensional isotropic space $I^3$ and construct helicoidal surfaces satisfying a linear equation in terms of the Gaussian curvature and the mean curvature of the surface.

Urban greening has been widely regarded as the most effective, lasting, and economical strategy for alleviating the effects of urban heat islands (UHIs). Previous studies on the cooling effect of urban green spaces (UGSs) tend to analyze the correlat...

The purpose of this paper is to introduce a summary of known results and the definition of the time-like ruled surface with the space-like generating space in the Minkowski space IR₁ⁿ, and to present some characteristic results related with minimali...

A space-based bistatic passive radar system, typically utilizing a satellite as the illuminator of opportunity and ground or aerial platforms as receivers, offers significant advantages for wide-area maritime surveillance, robust anti-jamming perform...

In the Euclidean space the Darboux vector may be interpreted kinematically as the direction of the instantaneous axis of rotation in the moving trihedron. In this paper we mainly study the Darboux vector of ruled surfaces in pseudo-Galilean space. We...

The Galilean space ${\mathbb{G}}^3$ occupies a central position in the analysis of classical kinematics and provides the geometric framework for representing Newtonian space-time. In this paper, we concentrate on classifying dual THA-surfaces in ${\mathbb{G}}^3$ and classify sp...

Revolution surfaces with zero mean curvature in the Galilean 3-space have been extensively studied in the literature. However, revolution surfaces with non-zero constant mean curvature in this geometric setting have not yet been investigated in a sys...

This paper focuses on the study of quadric surfaces in three-dimensional Euclidean space that satisfy the finite II-type Gauss map condition, a concept introduced firstly by B.-Y. Chen in its first fundamental form; later it was applied by other rese...

This paper investigates the extrinsic differential geometry of curves lying on a spacelike surface embedded in de Sitter 3-space. By employing the de Sitter Darboux frame along such a curve, we introduce a spacelike osculating Darboux vector field sa...

By generalizing the notion of the pointwise 1-type Gauss map, the generalized 1-type Gauss map has been recently introduced. Without any assumption, we classified all possible ruled surfaces with the generalized 1-type Gauss map in a 3-dimensional Mi...

Ruled surfaces in Minkowski 3-space play a crucial role in differential geometry and have significant applications in physics and engineering. This study explores the fundamental properties of ruled surfaces via orthogonal modified frame in Minkowski...

This paper is about a problem at the intersection of differential geometry, spectral analysis and the theory of manifolds. The study of finite-type subvarieties was initiated by Chen in the 1970s, with the aim of obtaining improved estimates for the...

We propose a comprehensive rotation-minimizing (RM) Darboux framework for the study of curve theory and relativistic ruled surfaces in Minkowski three-space ${\mathbb{E}}_1^3$. The construction merges the adaptability of the classical Darboux frame to surface geome...

In this study, the split window (SW) method was applied for land surface temperature (LST) retrieval using Landsat 8 in two apple orchards (Glindow, Altlandsberg). Four images were acquired during high demand of irrigation water from July to August 2...

Rapid urbanization has intensified the urban heat island (UHI) effect in Southeast Asian megacities, necessitating effective nature-based solutions. This study evaluates the cooling capacity of diverse green spaces in Khung Bang Kachao (KBK), Thailan...

A four-quadrant low-coherence envelope detection method was proposed for measuring the surface spacing of optical components, eliminating the requirement for precise control of the delay line scanning step to generate a π/2 phase shift. The method...

Climate change affects the urban population’s health and quality of life. Urban green spaces (UGS) underpin several essential ecosystem services, amongst them climate regulation. Urban vegetation mitigates high temperatures and, thus, reduces t...

We introduced the concept of involute partner-ruled surfaces, which are formed by the involutes of spacelike curves and additional conditions ensuring the presence of definite surface normals in Minkowski three-space. First, we provided the criteria...

We evaluated 30 blue and 31 green spaces in Fuzhou using a July land surface temperature (LST) composite from four quality-controlled Landsat 8 scenes acquired during 2020–2022. A cubic temperature–distance procedure produced positive coo...

In Minkowski 3-space, we establish a geometric framework to osculate Type-II ruled surfaces by utilizing the Type-II Bishop frame in $\left({\mathbb{E}}_1^3\right)$. Our analysis extends to higher-order singularities such as butterflies and pyramids, including explicit singul...

The construction of urban subway tunnels typically induces soil settlement within a specific radius of the surrounding area. However, the accuracy of current methods for predicting ground deformation curves corresponding to the excavation of double-t...

We introduce the real minimal surfaces family by using the Weierstrass data $({\zeta }^{-m},{\zeta }^m)$ for $\zeta \in \mathbb{C}$, $m\in {\mathbb{Z}}_{\ge 2},$ then compute the irreducible algebraic surfaces of the surfaces family in three-dimensional Euclidean space ${\mathbb{E}}^3$. In...

The urban heat island (UHI) effect is a global problem that is likely to grow as a result of urban population expansion. Multiple studies conclude that green spaces and waterbodies can reduce urban heat islands. However, previous studies often treat...

Research has demonstrated that urban green spaces play a crucial role in mitigating the severe urban heat island (UHI) effect. However, existing studies often suffer from limitations such as the neglect of the cooling effect of water bodies within th...

In this paper , considering the Darboux instantaneous rotation vector of a solid perpendicular trihedron in the Minkowski 3-space R₁³, the Frenet instantaneous rotation vector was stated for the Frenet trihedron of a space -like space curve (c) with...

In this paper, appropriate $L^p$ bounds for particular classes of parabolic Marcinkiewicz integrals along surfaces of revolution on product spaces are obtained. These bounds allow us to use Yano’s extrapolation argument to obtain the $L^p$ boundednes...