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Journal articles on the topic 'Area Projection Transform'

Author: Grafiati

Published: 11 March 2023

Last updated: 31 July 2025

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1

Spectorsky, Igor. "Gradient projection: simplifying minimization area by affine transform." System research and information technologies, no. 2 (June 28, 2024): 117–36. http://dx.doi.org/10.20535/srit.2308-8893.2024.2.09.

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One of the classical problems of optimization theory in a finite-dimensional space is to find a minimum of a function on a nonempty set. Usually, finding the precise solution to this task analytically requires a lot of computational resources or is even impossible at all. So, approximate methods are used most often in practical cases. One of the simplest and the most well-known among such approximate methods for unconditional optimization is the method of gradient descent; its generalization for conditional optimization was found in 1964, the method of projected gradient. For some simple sets

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YANG, JIANWEI, LIANG ZHANG, and ZHENGDA LU. "THE MELLIN CENTRAL PROJECTION TRANSFORM." ANZIAM Journal 58, no. 3-4 (2017): 256–64. http://dx.doi.org/10.1017/s1446181116000341.

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The central projection transform can be employed to extract invariant features by combining contour-based and region-based methods. However, the central projection transform only considers the accumulation of the pixels along the radial direction. Consequently, information along the radial direction is inevitably lost. In this paper, we propose the Mellin central projection transform to extract affine invariant features. The radial factor introduced by the Mellin transform, makes up for the loss of information along the radial direction by the central projection transform. The Mellin central p

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Dorrek, Felix, and Franz E. Schuster. "Projection functions, area measures and the Alesker–Fourier transform." Journal of Functional Analysis 273, no. 6 (2017): 2026–69. http://dx.doi.org/10.1016/j.jfa.2017.06.003.

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Zhou, Xiaohui, and Baoqin Wang. "Wavelet analysis on some smooth surface with nonzero constant Gaussian curvature." International Journal of Wavelets, Multiresolution and Information Processing 16, no. 01 (2018): 1850007. http://dx.doi.org/10.1142/s0219691318500078.

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According to the theory of wavelet analysis on [Formula: see text], the wavelet analysis on a smooth surface [Formula: see text] with nonzero constant Gaussian curvature will be discussed systematically in this paper. First, a general area-preserving projection from a smooth surface to the plane will be presented by the Gaussian projection and the area-preserving projection on the sphere. Then the continuous wavelet transform and its inverse transform on a smooth surface [Formula: see text] with nonzero constant Gaussian curvature will be discussed by a general area-preserving projection, rela

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MA, Tong Yi, and Li Li Zhang. "Lp−Winterniz problem on firey projection of convex bodies." Tamkang Journal of Mathematics 45, no. 2 (2014): 179–93. http://dx.doi.org/10.5556/j.tkjm.45.2014.1017.

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For $p\geq 1$, Lutwak, Yang and Zhang introduced the concept of $p$-projection body, and Lutwak introduced the concept of $L_{p}-$ affine surface area of convex body. In this paper, we develop the Minkowski-Funk transform approach in the $L_{p}$-Brunn-Minkowski theory. We consider the question of whether $\Pi_{p}K\subseteq \Pi_{p}L$ implies $\Omega_{p}(K) \leq \Omega_{p}(L)$, where $\Pi_{p}K$ and $\Omega_{p}K$ denotes the $p-$projection body of convex body $K$ and the $L_{p}-$affine surface area of convex body $K$, respectively. We also formulate and solve a generalized $L_{p}-$Winterniz probl

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Wang, Bao Qin, Gang Wang, Xiao Hui Zhou, and Yu Su. "Wavelet analysis on developable surface base on area preserving projection." International Journal of Wavelets, Multiresolution and Information Processing 13, no. 01 (2015): 1550007. http://dx.doi.org/10.1142/s0219691315500071.

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In this paper, a simple method is given in order to construct an area preserving mapping from a developable surface M to a plane. Based on the area preserving projection, we give some important formulas on M, and define a multi-resolution analysis on L2(M). We provide the conditions to further discuss the continuous wavelet transform and discrete wavelet transform on developable surface. At the same time, we derived two-scale equations that the scaling function and wavelet function on developable surface satisfied, we also define and discuss the orthogonality, and several important theorems ar

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Giachetti, A., and C. Lovato. "Radial Symmetry Detection and Shape Characterization with the Multiscale Area Projection Transform." Computer Graphics Forum 31, no. 5 (2012): 1669–78. http://dx.doi.org/10.1111/j.1467-8659.2012.03172.x.

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Suzuki, Sodai, Yuichi Akatsuka, Wei Jiang, Motoharu Fujigaki, and Masaaki Otsu. "Development of Quick Three-Dimensional Shape Measurement Projection Mapping System Using a Whole-Space Tabulation Method." Applied Sciences 9, no. 20 (2019): 4408. http://dx.doi.org/10.3390/app9204408.

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A grating projection method is often used as a highly accurate 3D shape measurement method. A real-time 3D shape measurement system can also be applied to measure a wide and smooth curved surface, such as in sheet metal processing. In this case, operators take much effort to recognize the positions of some problem areas on an object from a measured result displayed on a monitor. This study develops a projection mapping system projecting an evaluation image, such as height, displacement, gradient, curvature factor, and area of defect, onto an object. These evaluation results are obtained from t

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Tian, Xi Jie, Jing Yu, and Chang Chun Li. "Identification of the Hook on Investment Casting Shell Line Based on Machine Vision." Applied Mechanics and Materials 220-223 (November 2012): 1356–61. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.1356.

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In this paper, the idea identify the hook on investment casting shell line based on machine vision has been proposed. According to the characteristic of the hook, we do the image acquisition and preprocessing, we adopt Hough transform to narrow the target range, and find the target area based on the method combining the level projection and vertical projection, use feature matching method SIFT to do the image matching. Finally, we get the space information of the target area of the hook.

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Yan, Jin, Tiansheng Xu, Ni Li, and Guanghong Gong. "Regression and Evaluation on a Forward Interpolated Version of the Great Circle Arcs–Based Distortion Metric of Map Projections." ISPRS International Journal of Geo-Information 10, no. 10 (2021): 649. http://dx.doi.org/10.3390/ijgi10100649.

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We studied the numerical approximation problem of distortion in map projections. Most widely used differential methods calculate area distortion and maximum angular distortion using partial derivatives of forward equations of map projections. However, in certain map projections, partial derivatives are difficult to calculate because of the complicated forms of forward equations, e.g., equations with iterations, integrations, or multi-way branches. As an alternative, the spherical great circle arcs–based metric employs the inverse equations of map projections to transform sample points from the

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Feng, Xiang, Yang-chun Song, Zhi-quan Zhou, and Yi-nan Zhao. "Designing Unimodular Waveform with Low Range Sidelobes and Stopband for Cognitive Radar via Relaxed Alternating Projection." International Journal of Antennas and Propagation 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/6280508.

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Cognitive radar could adapt the spectrum of waveforms in response to information regarding the changing environment, so as to avoid narrowband interference or electronic jamming. Besides stopband constraints, low range sidelobes and unimodular property are also desired. In this paper, we propose a Spectral Approximation Relaxed Alternating Projection (SARAP) method, to synthesize unimodular waveform with low range sidelobes and spectral power suppressed. This novel method, based on phase retrieval and relaxed alternating projection, could convert the correlation optimization into the spectrum

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Algarni, Abeer D., Ghada M. El Banby, Naglaa F. Soliman, Fathi E. Abd El-Samie, and Abdullah M. Iliyasu. "Efficient Implementation of Homomorphic and Fuzzy Transforms in Random-Projection Encryption Frameworks for Cancellable Face Recognition." Electronics 9, no. 6 (2020): 1046. http://dx.doi.org/10.3390/electronics9061046.

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To circumvent problems associated with dependence on traditional security systems on passwords, Personal Identification Numbers (PINs) and tokens, modern security systems adopt biometric traits that are inimitable to each individual for identification and verification. This study presents two different frameworks for secure person identification using cancellable face recognition (CFR) schemes. Exploiting its ability to guarantee irrevocability and rich diversity, both frameworks utilise Random Projection (RP) to encrypt the biometric traits. In the first framework, a hybrid structure combinin

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Zhang, Yinbo. "Stability analysis and evaluation of a highway slope in the high and cold mountain area and suggestions for prevention and control." Frontiers of Engineering and Scientific Research 1, no. 2 (2024): 1. http://dx.doi.org/10.56028/fesr.2.1.1.2024.

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In order to ensure the stability of a rocky slope on a highway in a high cold mountainous area, this paper evaluates the stability of the right high slope in the section from K155+320 to K155+460 using the Chi Ping projection method and the fuzzy evaluation method based on game theory-cloudified object model. Firstly, the geological, geomorphological, hydrological and other natural profile information of the slope is obtained through field investigation, and these indicators are transformed into evaluation indicators for qualitative evaluation using the Chi Ping projection method. Then, the fu

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Han, Yunhao, Bin Wang, Jingyi Yang, Fang Yin, and Linsen He. "Research on Hyperspectral Inversion of Soil Organic Carbon in Agricultural Fields of the Southern Shaanxi Mountain Area." Remote Sensing 17, no. 4 (2025): 600. https://doi.org/10.3390/rs17040600.

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Rapidly obtaining information on the content and spatial distribution of soil organic carbon (SOC) in farmland is crucial for evaluating regional soil quality, land degradation, and crop yield. This study focuses on mountain soils in various crop cultivation areas in Shangzhou District, Shangluo City, Southern Shaanxi, utilizing ZY1-02D hyperspectral satellite imagery, field-measured hyperspectral data, and field sampling data to achieve precise inversion and spatial mapping of the SOC content. First, to address spectral bias caused by environmental factors, the Spectral Space Transformation (

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Li, Hongru, Hao Wei, Jiangtao Liu, et al. "Fringe Projection Profilometry Based on Saturated Fringe Restoration in High Dynamic Range Scenes." Sensors 23, no. 6 (2023): 3133. http://dx.doi.org/10.3390/s23063133.

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In high dynamic scenes, fringe projection profilometry (FPP) may encounter fringe saturation, and the phase calculated will also be affected to produce errors. This paper proposes a saturated fringe restoration method to solve this problem, taking the four-step phase shift as an example. Firstly, according to the saturation of the fringe group, the concepts of reliable area, shallow saturated area, and deep saturated area are proposed. Then, the parameter A related to the reflectivity of the object in the reliable area is calculated to interpolate A in the shallow and deep saturated areas. The

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Wu, Xueling, Jiaxin Lu, Chaojie Lv, Liuting Qin, Rongrui Liu, and Yanjuan Zheng. "Spatiotemporal Analysis of Eco-Geological Environment Using the RAGA-PP Model in Zigui County, China." Remote Sensing 17, no. 14 (2025): 2414. https://doi.org/10.3390/rs17142414.

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The Three Gorges Reservoir Area in China presents a critical conflict between industrial development and ecological conservation. It functions as a key hub for water management, energy production, and shipping, while also serving as a vital zone for ecological and environmental protection. Focusing on Zigui County, this study developed a 16-indicator evaluation system integrating geological, ecological, and socioeconomic factors. It utilized the Analytic Hierarchy Process (AHP), coefficient of variation (CV), and the Real-Coded Accelerating Genetic Algorithm-Projection Pursuit (RAGA-PP) model

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Dorokhov, V. B., A. Runnova, O. N. Tkachenko, et al. "Analysis two types of K complexes on the human EEG based on classical continuous wavelet transform." Chaos: An Interdisciplinary Journal of Nonlinear Science 33, no. 3 (2023): 031102. http://dx.doi.org/10.1063/5.0143284.

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In our work, we compare EEG time–frequency features for two types of K-complexes detected in volunteers performing the monotonous psychomotor test with their eyes closed. Type I K-complexes preceded spontaneous awakenings, while after type II K-complexes, subjects continued to sleep at least for 10 s after. The total number of K-complexes in the group of 18 volunteers was 646, of which of which type I K-complexes was 150 and type II K-complexes was 496. Time–frequency analysis was performed using continuous wavelet transform. EEG wavelet spectral power was averaged upon several brain zones for

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Huang, Xiaoyu, Xuemei Wang, Kawuqiati Baishan, and Baisong An. "Hyperspectral Estimation of Soil Organic Carbon Content Based on Continuous Wavelet Transform and Successive Projection Algorithm in Arid Area of Xinjiang, China." Sustainability 15, no. 3 (2023): 2587. http://dx.doi.org/10.3390/su15032587.

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Soil organic carbon (SOC), an important indicator to evaluate soil fertility, is essential in agricultural production. The traditional methods of measuring SOC are time-consuming and expensive, and it is difficult for these methods to achieve large area measurements in a short time. Hyperspectral technology has obvious advantages in soil information analysis because of its high efficiency, convenience and non-polluting characteristics, which provides a new way to achieve large-scale and rapid SOC monitoring. The traditional mathematical transformation of spectral data in previous studies does

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Mane, Manisha, and Anand Bhaskar. "Visually Salient Region Detection in Omnidirectional Images Using Wavelet Textural Feature Map." Scientific Visualization 16, no. 3 (2024): 23–36. http://dx.doi.org/10.26583/sv.16.3.03.

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Salient object detection is a crucial aspect of computer vision that involves identifying the most prominent area in a 2D image. However, predicting salient regions in omnidirectional images can be challenging due to their circular field of view.To facilitate saliency detection, pre and post-processing are required, which involves converting the image into an equirectangular projection (ERP). In this study, we propose a detailed approach to saliency detection for omnidirectional images using the wavelet domain. Our proposed model utilizes a 2-D wavelet transform to decompose and reconstruct im

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Li, Lingling, Tao Gao, and Yaoquan Yang. "Direct Part Mark Bar Code Image Preprocessing." International Journal of Advanced Pervasive and Ubiquitous Computing 7, no. 3 (2015): 13–24. http://dx.doi.org/10.4018/ijapuc.2015070102.

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Due to factors such as ambient light and metal materials, the collected industrial DPM bar code images may exist uneven illumination, low contrast, color of background area is darker than bar code region and other harsh issues, while the existing 2D code recognition device can only recognize the type which bar code area color is darker than background region. Therefore, the quality of preprocessing effect is the key point to subsequent recognition algorithm. In this paper, the homomorphic filtering method is used to weaken the influence of uneven illumination firstly, which will enhance the im

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Hu, Rensu, Dong Li, Jun Wan, et al. "Integration and Detection of a Moving Target with Multiple Beams Based on Multi-Scale Sliding Windowed Phase Difference and Spatial Projection." Remote Sensing 15, no. 18 (2023): 4429. http://dx.doi.org/10.3390/rs15184429.

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Due to the fast scanning speed of the current phased-array radar and the moving characteristics of the target, the moving target usually spans multiple beams during coherent integration time, which results in severe performance loss for target focusing and parameter estimation because of the unknown entry/departure beam time within the coherent period. To solve this issue, a novel focusing and detection method based on the multi-beam phase compensation function (MBPCF), multi-scale sliding windowed phase difference (MSWPD), and spatial projection are proposed in this paper. The proposed method

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Wübbeler, Gerd, Manuel Marschall, Eckart Rühl, Bernd Kästner, and Clemens Elster. "Compressive nano-FTIR chemical mapping." Measurement Science and Technology 33, no. 3 (2021): 035402. http://dx.doi.org/10.1088/1361-6501/ac407a.

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Abstract Nano-Fourier-transform infrared spectroscopy (nano-FTIR) combines infrared spectroscopy with scanning probe microscopy (SPM) techniques and enables spectroscopic imaging of molecular and electronic properties of matter at nanometer spatial resolution. The spectroscopic imaging can be used to derive chemical mappings, i.e. the spatial distribution of concentrations of the species contained in a given sample. However, due to the sequential scanning principle underlying SPM, recording the complete spectrum over a large spatial area leads to long measurement times. Furthermore, the acquir

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Úcar, Xavier. "Exploring different perspectives of Social Pedagogy: towards a complex and integrated approach." education policy analysis archives 21 (April 30, 2013): 36. http://dx.doi.org/10.14507/epaa.v21n36.2013.

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Some characterizations describe social pedagogy as a broad, complex, ambiguous and problematic concept that applies to very different things. This is due to the simplicity of the tools used to approach such a complex area. A change of perspective to interpret social pedagogy as a hybrid and complex subject may transform the alleged deficiencies into strengths and promise. This paper provides elements that enable such a change. To this end, some misunderstandings regarding social pedagogy are presented. These misunderstandings are scenarios and factors that have contributed (1) to the generatio

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Martínez, Álvaro, Antonio Santo, Monica Ballesta, Arturo Gil, and Luis Payá. "A Method for the Calibration of a LiDAR and Fisheye Camera System." Applied Sciences 15, no. 4 (2025): 2044. https://doi.org/10.3390/app15042044.

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LiDAR and camera systems are frequently used together to gain a more complete understanding of the environment in different fields, such as mobile robotics, autonomous driving, or intelligent surveillance. Accurately calibrating the extrinsic parameters is crucial for the accurate fusion of the data captured by both systems, which is equivalent to finding the transformation between the reference systems of both sensors. Traditional calibration methods for LiDAR and camera systems are developed for pinhole cameras and are not directly applicable to fisheye cameras. This work proposes a target-b

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Lai, Zhipeng, Chengjing Chen, Jianguo Chen, Zhuo Wu, Fang Wang, and Shaoying Li. "Multi-Scenario Simulation of Land-Use Change and Delineation of Urban Growth Boundaries in County Area: A Case Study of Xinxing County, Guangdong Province." Land 11, no. 9 (2022): 1598. http://dx.doi.org/10.3390/land11091598.

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Delineating urban growth boundaries (UGBs) by combining the land-use/land-cover (LULC) change simulation method has become common in recent studies. However, few of the existing studies have integrated multi-source big data to analyze the driving factors of LULC dynamics in the simulation. Moreover, most of previous studies mainly focused on the UGBs delineation in macroscale areas rather than small-scale areas, such as the county area. In this study, taking Xinxing County of Guangdong Province as the study area, we coupled a system dynamics (SD) model and a patch-generating land-use simulatio

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Lenoir, Guillaume, and Michel Crucifix. "A general theory on frequency and time–frequency analysis of irregularly sampled time series based on projection methods – Part 2: Extension to time–frequency analysis." Nonlinear Processes in Geophysics 25, no. 1 (2018): 175–200. http://dx.doi.org/10.5194/npg-25-175-2018.

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Abstract. Geophysical time series are sometimes sampled irregularly along the time axis. The situation is particularly frequent in palaeoclimatology. Yet, there is so far no general framework for handling the continuous wavelet transform when the time sampling is irregular. Here we provide such a framework. To this end, we define the scalogram as the continuous-wavelet-transform equivalent of the extended Lomb–Scargle periodogram defined in Part 1 of this study (Lenoir and Crucifix, 2018). The signal being analysed is modelled as the sum of a locally periodic component in the time–frequency pl

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Aoyagi, Seiji, Atsushi Kohama, Yuki Inaura, Masato Suzuki, and Tomokazu Takahashi. "Image-Searching for Office Equipment Using Bag-of-Keypoints and AdaBoost." Journal of Robotics and Mechatronics 23, no. 6 (2011): 1080–90. http://dx.doi.org/10.20965/jrm.2011.p1080.

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For an indoor mobile robot’s Simultaneous Localization And Mapping (SLAM), a method of processing only one monocular image (640×480 pixel) of the environment is proposed. This method imitates a human’s ability to grasp at a glance the overall situation of a room, i.e., its layout and any objects or obstacles in it. Specific object recognition of a desk through the use of several camera angles is dealt with as one example. The proposed method has the following steps. 1) The bag-of-keypoints method is applied to the image to detect the existence of the object in the input image. 2) If the existe

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Wang, Yunxun, Hanspeter Winkler, Michael K. Reedy, Mary C. Reedy, and Kenneth A. Taylor. "Electron Tomography of Swollen Rigor Fibers of Insect Flight Muscle Reveals the S2 Fragment of Myosin." Microscopy and Microanalysis 7, S2 (2001): 98–99. http://dx.doi.org/10.1017/s1431927600026568.

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We have used electron tomography of rigorized fibers of insect flight muscle swollen by immersion in dilute buffer (†1mM MOPS, pH 6.8), to reveal the 3-D arrangement of the myosin S2 fragment for the first time. S2 is an α-helical coiled-coil structure that connects the myosin head to the thick filament backbone. It is usually invisible in electron micrographs because of its close proximity to the backbone. The increase in inter-thick filament spacing from 45 nm to 55 nm pulls the S2 away from the filament backbone making it easier to identify. A total of 4 tomograms have been calculated by ou

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Zhang, Lingzhi, Haomin Dai, Jialin Zhang, et al. "A Study on Origin Traceability of White Tea (White Peony) Based on Near-Infrared Spectroscopy and Machine Learning Algorithms." Foods 12, no. 3 (2023): 499. http://dx.doi.org/10.3390/foods12030499.

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Identifying the geographical origins of white tea is of significance because the quality and price of white tea from different production areas vary largely from different growing environment and climatic conditions. In this study, we used near-infrared spectroscopy (NIRS) with white tea (n = 579) to produce models to discriminate these origins under different conditions. Continuous wavelet transform (CWT), min-max normalization (Minmax), multiplicative scattering correction (MSC) and standard normal variables (SNV) were used to preprocess the original spectra (OS). The approaches of principal

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Zulfani, Elga, Dedi Satria, Nurul Widya, and Ifan Rivaldo. "Klasifikasi Tiga Varietas Daun Gambir (Uncaria Gambir Roxb.) Menggunakan Spektroskopi Inframerah dan Analisis Kemometrik." Menara Ilmu 19, no. 2 (2025): 536–43. https://doi.org/10.31869/mi.v19i2.6658.

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Penelitian ini bertujuan untuk mengklasifikasikan tiga varietas daun gambir (Uncaria gambir Roxb.), yaitu varietas Udang, Riau, dan Cubadak, yang tumbuh di Sumatera Barat, menggunakan metode spektroskopi Fourier Transform Infrared Spectroscopy (FTIR) dan analisis kemometrik. Spektrum inframerah diperoleh dalam rentang panjang gelombang 4000–500 cm⁻¹. Analisis kemometrik yang digunakan meliputi Principal Component Analysis (PCA), Partial Least Squares Discriminant Analysis (PLS-DA), dan Orthogonal Partial Least Squares Discriminant Analysis (OPLS-DA). Sebelum analisis kemometrik dilakukan, data

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HOMAEINEZHAD, MOHAMMAD R., MOHAMMAD AGHAEE, HAMID NAJJARAN TOOSI, ALI GHAFFARI, and REZA RAHMANI. "APPLICATION OF THE DISCRETE WAVELET TRANSFORM FOR THE ROBUST DETECTION OF THE IMPULSIVE INCIDENCES: APPLICATION TO ARTERIAL BLOOD PRESSURE CHARACTERISTIC EVENTS DETECTION–DELINEATION." International Journal of Wavelets, Multiresolution and Information Processing 09, no. 05 (2011): 813–42. http://dx.doi.org/10.1142/s0219691311004328.

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The major focus of this study is to describe the structure of a solution designed for robustly detecting and delineating the arterial blood pressure (ABP) signal events. To meet this end, first, the original ABP signal is pre-processed by application of à trous discrete wavelet transform (DWT) for extracting several dyadic scales. Then, a fixed sample size sliding window is moved on the appropriately selected scale and in each slid, six features namely as summation of the nonlinearly amplified Hilbert transform, summation of absolute first-order differentiation, summation of absolute second-or

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Zhang, Yuanmin, Zhu Jiang, and Junfeng Lu. "Research on Leakage Location of Pipeline Based on Module Maximum Denoising." Applied Sciences 13, no. 1 (2022): 340. http://dx.doi.org/10.3390/app13010340.

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Leak detection and location of water supply pipelines is an important area of research, and it is especially important to find the leakage location in time and repair them. In view of the problem, that a large amount of noise is mixed in the detection signal when the pipeline leaks, it will inevitably affect the detection and positioning effect. In this paper, a denoising algorithm based on improved module maximum is proposed. Firstly, a discrete binary wavelet transform is carried out on the noisy signal, and the module maximum point corresponding to the wavelet transform coefficients, on eac

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Cięszczyk, Sławomir, Damian Harasim, Ainur Ormanbekova, Krzysztof Skorupski, and Martyna Wawrzyk. "Methods of Projecting Mode Amplitude Changes on the Wavelength Axis in Order to Determine the Bending Radius on the Basis of TFBG Grating Spectra." Sensors 21, no. 22 (2021): 7526. http://dx.doi.org/10.3390/s21227526.

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Tilted fibre Bragg grating (TFBG) are used as sensors to determine many quantities such as refractive index, temperature, stress, rotation and bending. The TFBG spectrum contains a lot of information and various algorithms are used for its analysis. However, most of these algorithms are dedicated to the analysis of spectral changes under the influence of the refractive index. The most popular algorithm used for this purpose is to calculate the area occupied by cladding modes. Among the remaining algorithms, there are those that use the determination of the cut-off wavelength as a surrounding r

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Irfan, Muhammad, Masooma Irfan, Ani Idris, et al. "Dual Optimized Sulfonated Polyethersulfone and Functionalized Multiwall Carbon Tube Based Composites High Fouling Resistance Membrane for Protein Separation." Membranes 12, no. 3 (2022): 329. http://dx.doi.org/10.3390/membranes12030329.

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Commercial grade sulfonated-Polyethersulfone (S-PES) and functionalized multiwall carbon nanotube (f-MWCNT)/polyvinylpyrrolidone (PVP) nanocomposites (NCs) were used to enhance and optimize the antifouling, protein resistance and protein separation properties of the S-PES ultrafiltration membranes. The polarities of sulfonic groups of S-PES, carbonyl carbon of pyrrolidone, hydroxyl and carboxyl groups of f-MWCNT in the membrane composition helped to strongly bind each other through hydrogen bonding, as shown by Fourier-transform infrared spectroscopy (FTIR). These binding forces greatly reduce

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Natsiopoulos, Dimitrios A., Elisavet G. Mamagiannou, Eleftherios A. Pitenis, Georgios S. Vergos, and Ilias N. Tziavos. "GOCE Downward Continuation to the Earth’s Surface and Improvements to Local Geoid Modeling by FFT and LSC." Remote Sensing 15, no. 4 (2023): 991. http://dx.doi.org/10.3390/rs15040991.

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One of the main applications of the gravity field and steady-state Ocean Circulation Explorer (GOCE) satellite data is their combination with local gravity anomalies for geoid and gravity field modeling purposes. The aim of the present paper was the determination of an improved geoid model for the wider Hellenic area, using original GOCE SGG data filtered to retain only useful signals inside the measurement bandwidth (MBW) of the satellite. The filtered SGGs, originally at the satellite altitude, were projected to a mean orbit (MO) and then downward continued to the Earth’s surface (ES) in ord

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Zhang, Xu, Jun Zhou, Chunguang Lu, Lei Song, Fanyu Meng, and Xianbo Wang. "Non-Intrusive Load Monitoring Based on Dimensionality Reduction and Adapted Spatial Clustering." Energies 17, no. 17 (2024): 4303. http://dx.doi.org/10.3390/en17174303.

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Non-invasive load monitoring (NILM) deduces changes in energy consumption patterns and operational statuses of electrical equipment from power signals in the feed line. With the emergence of fine-grained power load distribution, the importance of utilizing this technology for implementing demand-side energy management in smart grid development has become increasingly prominent. To address the issue of low load identification accuracy stemming from complex and diverse load types, this paper introduces a NILM method based on uniform manifold approximation and projection (UMAP) reduction and enha

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Ibrahim, Elkhedr, Mohamed Arfaoui, Saad Mogren, Saleh Qaysi, Aref Lashin, and Hussain Alfaifi. "Disposition of magmatic eruptions and fault distribution in northwestern Saudi Arabia using pseudo-depth slice magnetic anomaly." Journal of Geophysics and Engineering 18, no. 4 (2021): 463–81. http://dx.doi.org/10.1093/jge/gxab028.

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Abstract This study presents the disposition of magmatic eruptions with a fault distribution in northwestern Saudi Arabia, where intensive magma invades the lithosphere. Structural and magmatic features are traced at successive depths through high-resolution magnetic anomaly pseudo-depth slices. The total horizontal gradient technique is applied to pseudo-depth slice magnetic anomalies to enhance the linear trends of faults and related magmatic activity. A comprehensive cross-section constructed from the projection of gradient horizontal maxima relative to pseudo-slices allows the visualizatio

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Strebe, Daniel “daan.” "A bevy of area-preserving transforms for map projection designers." Cartography and Geographic Information Science 46, no. 3 (2018): 260–76. http://dx.doi.org/10.1080/15230406.2018.1452632.

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Thaung, Yin, Moh Moh Than Khin, and Tun Win. "Face Recognition System using Self Organizing Feature Map and Appearance Based Approach." International Journal of Trend in Scientific Research and Development 3, no. 5 (2019): 1598–603. https://doi.org/10.5281/zenodo.3591141.

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Face Recognition has develop one of the most effective presentations of image analysis. This area of research is important not only for the applications in human computer interaction, biometric and security but also in other pattern classification problem. To improve face recognition in this system, two methods are used PCA Principal component analysis and SOM Self organizing feature Map .PCA is a subspace projection method is used compress the input face image. SOM method is used to classify DCT based feature vectors into groups to identify if the subject in the input image is "present&q

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Zhu, Zhiyuan, Yuanfei Cai, Kexing Song, Yanjun Zhou та Jiasheng Zou. "Precipitation Characteristics of the Metastable γ″ Phase in a Cu-Ni-Be Alloy". Materials 11, № 8 (2018): 1394. http://dx.doi.org/10.3390/ma11081394.

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The precipitation sequence of a Cu-Ni-Be alloy is: α-Cu supersaturated solid solution → Guinier-Preston (G.P.) zones → metastable γ″ → γ′ → stable γ (NiBe) phase. The micro-hardness and electrical conductivity during the aging process were measured. The precipitation characteristics and the distribution of the γ″ phase, under peak aging conditions, were analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area diffraction pattern (SADP), and high-resolution transmission electron microscopy (HRTEM). The results show that the orientation relationship of the γ′′ p

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Shirazi, Muhammad Ayaz, Riaz Uddin, and Min-Young Kim. "Supervised Learning Based Peripheral Vision System for Immersive Visual Experiences for Extended Display." Applied Sciences 11, no. 11 (2021): 4726. http://dx.doi.org/10.3390/app11114726.

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Video display content can be extended to the walls of the living room around the TV using projection. The problem of providing appropriate projection content is hard for the computer and we solve this problem with deep neural network. We propose the peripheral vision system that provides the immersive visual experiences to the user by extending the video content using deep learning and projecting that content around the TV screen. The user may manually create the appropriate content for the existing TV screen, but it is too expensive to create it. The PCE (Pixel context encoder) network consid

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Keung, C., J. Correia, A. Longano та ін. "DOP119 Predicting response to anti-tumour necrosis factor-alpha therapy-α in fibrostenotic Crohn’s disease using infra-red microspectroscopy". Journal of Crohn's and Colitis 19, Supplement_1 (2025): i297—i298. https://doi.org/10.1093/ecco-jcc/jjae190.0158.

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Abstract Background Fibrostenotic strictures are common in Crohn’s disease, have limited treatment options and lack validated biomarkers to predict treatment response. Fourier-transform infra-red (FTIR) spectroscopy provides reproducible biochemical information from biospecimens using a rapid, label-free, non-destructive technique via molecular vibrations. We previously completed a proof-of-concept study that identified spectral biomarkers for inflammation in a model of colitis.1 The aim of this study was to investigate whether the tissue biochemical "fingerprint" using FTIR spectroscopy can p

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Panyukovа, Yulia G., Elena S. Alexandrova, Elena N. Panina, and Lyudmila A. Makovets. "Ecopsychological Competence in Interaction with the Spatial Environment of Everyday Life: Theoretical Foundations and Practices of Development." Общество: социология, психология, педагогика, no. 12 (December 27, 2023): 2–69. http://dx.doi.org/10.24158/spp.2023.12.8.

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The author analyzes the theoretical foundations and practices of the development of ecopsychological compe-tence as the ability of the subject to determine and transform the potential of various characteristics of the spa-tial environment of everyday life into a psychological resource necessary to maintain optimal functioning. A review of theoretical approaches, the focus of which is the position of the environment “as a resource of psy-chological health” and “a resource for overcoming stress” (according to S.K. Nartova-Bochaver), allows us to conclude that there is an impressive number of the

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Bulavskaya, A. A., A. V. Batranin, E. A. Bushmina, et al. "Prospects of the multiangle scanning method for determining the transverse profile of a medical electron beam." "Radiation and Risk" Bulletin of the National Radiation and Epidemiological Registry 32, no. 2 (2023): 66–77. http://dx.doi.org/10.21870/0131-3878-2023-32-2-66-77.

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This study is aimed at assessing the applicability of the proposed method of multiangle beam scanning for determining the transverse profile of an electron beam. The application area of the proposed approach will be control of the therapeutic beams spatial and dose characteristics in order to increase the irradiation accuracy and, as a result, reduce the side effects of radiation therapy. One of the main applied problems to be solved by the proposed approach is to determine the beam characteristics during electron beam therapy. For carrying out of electron beam therapy procedures it is necessa

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Nesvidomin, Andrii, Serhii Pylypaka, Vitaliy Babka, and Iryna Hryshchenko. "SPHERICAL ANALOG OF CYCLOIDS." APPLIED GEOMETRY AND ENGINEERING GRAPHICS 1, no. 106 (2024): 192–200. https://doi.org/10.32347/0131-579x.2024.106.192-200.

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Spheres and planes have certain properties that unite them. For example, the Gaussian curvature is constant at all points: it has a positive value for the sphere, and zero for the plane. In this regard, all flat figures can slide in a plane, and spherical figures can slide on the surface of a sphere. An image built on a limited area of the sphere can approach a flat one with unlimited growth of its radius. This idea was used by the famous mechanical scientist V.V. Dobrovolsky for an analogy between flat and spherical mechanisms. Scientist-mathematician, Swiss by origin L.I. Fuss studied the pr

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Perheentupa, Viljami, Ville Mäkinen, and Juha Oksanen. "Making post-glacial uplift visible: A model based high-resolution animation of shore displacement." Abstracts of the ICA 1 (July 15, 2019): 1–2. http://dx.doi.org/10.5194/ica-abs-1-296-2019.

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<p><strong>Abstract.</strong> Glacial isostatic adjustment (GIA) is an ongoing phenomenon that characterizes the landscape of the High Coast (63°04'N, 18°22'E, Sweden) / Kvarken archipelago (63°16'N, 21°10'E, Finland) UNESCO World Heritage site. GIA occurs as the Earth’s crust that was depressed by the continental ice sheet during the last glacial period is slowly rebounding towards isostatic equilibrium. The maximum rate of land uplift in the area is more than eight millimetres per year, which &amp;ndash; along with the very different topographical reliefs of the opposit

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Nur Lina Abdullah, Norul Fadhilah Ismail, Saiful Bahri Safaron, Nurazeera Md Suder, and Nurul Wahidah Omar. "Water Overlapping Area for The Arrangement of Field’s Sprinkler Irrigation." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 88, no. 1 (2021): 140–48. http://dx.doi.org/10.37934/arfmts.88.1.140148.

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The design and arrangement of sprinkler irrigation systems are presented and discussed in this paper. The design is based on a rotating sprinkler system to irrigate the field. Information is provided concerning the components of irrigation systems and the characteristics of the system that affect water application efficiency. The mathematical model is developed to account for water overlapping area throughout a fixed sprinkler system and to evaluate the number of sprinkler irrigation for the whole field using water projection profiles from the experimental data analysis. As a result, a set of

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Senin, Nicola, Michele Moretti, and Liam A. Blunt. "Identification of individual features in areal surface topography data by means of template matching and the ring projection transform." Surface Topography: Metrology and Properties 2, no. 1 (2013): 014007. http://dx.doi.org/10.1088/2051-672x/2/1/014007.

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Ziboon, Abdul Razzak, and Israa Mohammed. "Accuracy evaluation of 2D geometric correction models: Iraq as a case study." MATEC Web of Conferences 162 (2018): 03015. http://dx.doi.org/10.1051/matecconf/201816203015.

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One of the most important preprocessing methods for remote sensing data and geometrical distrortion is the geometric correction. In this research, several mathematical models were used in two dimensions case and were compared to each other to determine the accuracy of each mathematical model when used in three different regions with different terrains. Three high-resolution satellite images of the QuickBird satellite (a flat area, a hilly area and a mountain area) of Iraq have been used in this work. The flat area is chosen in Baghdad, while the hilly and mountain areas are chosen in Irbil in

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Liu, Chun-Hsi, Chun-Yu Hsiao, Jyh-Cherng Gu, et al. "Assessment the Visual Clarity of the Projector in Classroom and Innovative Asymmetric Distribution LED Tube Applications." Applied Sciences 11, no. 23 (2021): 11153. http://dx.doi.org/10.3390/app112311153.

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The paper aims to explore the relationship between the vertical plane luminance on projection screens and human visual clarity in the classroom or meeting room. While controlling the lighting environment conditions of the classroom to create different luminous distributions and luminance on the projection screen, a survey is conducted to understand students’ visual experience about screen clarity during the field experiment. The luminance of each picture on the projection screen is measured under the specified lighting conditions of luminaires in the classroom, and the relationship is formulat

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