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554 Results Found

  • Article
  • Open Access
2 Citations
2,258 Views
13 Pages

Quadratic Curve Fitting-Based Image Edge Line Segment Detection: A Novel Methodology

  • Rui Qiao,
  • Guili Xu,
  • Ping Wang,
  • Yuehua Cheng and
  • Wende Dong

27 July 2023

In the field of computer vision, edge line segment detection in images is widely used in tasks such as 3D reconstruction and simultaneous localization and mapping. Currently, there are many algorithms that primarily focus on detecting straight line s...

  • Article
  • Open Access
675 Views
11 Pages

25 October 2025

Objective: The purpose of this study is to present a kyphosis measurement method based on quadratic spline fitting through three key vertebral landmarks: T12, T8 and T4. This approach aims to capture thoracic spine curvature more continuously and acc...

  • Article
  • Open Access
28 Citations
4,492 Views
12 Pages

Brillouin Frequency Shift of Fiber Distributed Sensors Extracted from Noisy Signals by Quadratic Fitting

  • Hanrong Zheng,
  • Zujie Fang,
  • Zhaoyong Wang,
  • Bin Lu,
  • Yulong Cao,
  • Qing Ye,
  • Ronghui Qu and
  • Haiwen Cai

31 January 2018

It is a basic task in Brillouin distributed fiber sensors to extract the peak frequency of the scattering spectrum, since the peak frequency shift gives information on the fiber temperature and strain changes. Because of high-level noise, quadratic f...

  • Article
  • Open Access
9 Citations
4,879 Views
17 Pages

8 February 2022

Digital image correlation techniques are well known for motion extraction from video images. Following a two-stage approach, the pixel-level displacement is first estimated by maximizing the cross-correlation between two images, then the estimation i...

  • Article
  • Open Access
3 Citations
3,492 Views
20 Pages

Sparsity-Aware Noise Subspace Fitting for DOA Estimation

  • Chundi Zheng,
  • Huihui Chen and
  • Aiguo Wang

21 December 2019

We propose a sparsity-aware noise subspace fitting (SANSF) algorithm for direction-of-arrival (DOA) estimation using an array of sensors. The proposed SANSF algorithm is developed from the optimally weighted noise subspace fitting criterion. Our form...

  • Article
  • Open Access
17 Citations
2,902 Views
25 Pages

7 May 2022

Since the 1930s, due to the rapid development of the city and the increase of population, the demand from Beijing residents for water resources has gradually increased. Land deformation in the Beijing Plain is a serious issue. In order to warn of, an...

  • Article
  • Open Access
6 Citations
5,585 Views
21 Pages

29 April 2017

Reconstruction of 3D structures from multiple 2D images has wide applications in such fields as computer vision, cultural heritage preservation, etc. This paper presents a novel multi-view stereo algorithm based on homogeneous direct spatial expansio...

  • Article
  • Open Access
19 Citations
7,769 Views
19 Pages

Vision-Based Leader Vehicle Trajectory Tracking for Multiple Agricultural Vehicles

  • Linhuan Zhang,
  • Tofael Ahamed,
  • Yan Zhang,
  • Pengbo Gao and
  • Tomohiro Takigawa

22 April 2016

The aim of this study was to design a navigation system composed of a human-controlled leader vehicle and a follower vehicle. The follower vehicle automatically tracks the leader vehicle. With such a system, a human driver can control two vehicles ef...

  • Article
  • Open Access
88 Citations
8,341 Views
19 Pages

Winter Wheat Yield Assessment from Landsat 8 and Sentinel-2 Data: Incorporating Surface Reflectance, Through Phenological Fitting, into Regression Yield Models

  • Sergii Skakun,
  • Eric Vermote,
  • Belen Franch,
  • Jean-Claude Roger,
  • Nataliia Kussul,
  • Junchang Ju and
  • Jeffrey Masek

27 July 2019

A combination of Landsat 8 and Sentinel-2 offers a high frequency of observations (3–5 days) at moderate spatial resolution (10–30 m), which is essential for crop yield studies. Existing methods traditionally apply vegetation indices (VIs...

  • Article
  • Open Access
4 Citations
10,685 Views
16 Pages

24 September 2009

By a “covering” we mean a Gaussian mixture model fit to observed data. Approximations of the Bayes factor can be availed of to judge model fit to the data within a given Gaussian mixture model. Between families of Gaussian mixture models, we propose...

  • Communication
  • Open Access
8 Citations
4,071 Views
11 Pages

Electromyography–Force Relation and Muscle Fiber Conduction Velocity Affected by Spinal Cord Injury

  • Le Li,
  • Huijing Hu,
  • Bo Yao,
  • Chengjun Huang,
  • Zhiyuan Lu,
  • Cliff S. Klein and
  • Ping Zhou

A surface electromyography (EMG) analysis was performed in this study to examine central neural and peripheral muscle changes after a spinal cord injury (SCI). A linear electrode array was used to record surface EMG signals from the biceps brachii (B...

  • Article
  • Open Access
10 Citations
4,876 Views
22 Pages

The computation of the relative biological effectiveness (RBE) is a fundamental step in the planning of cancer radiotherapy treatments with accelerated ions. Numerical parameters derived analyzing the dose response of the chosen cell line after irrad...

  • Article
  • Open Access
1 Citations
2,417 Views
15 Pages

Establishment of Fitted Models for Topographical Factors and Coexisting Plants Influencing Distribution of Natural Wild Jujube

  • Yansheng Wu,
  • Yanchao Wang,
  • Weitao Niu,
  • Pengfei Zhang,
  • Lina Wu,
  • Huan Li and
  • Senghu Wang

21 February 2023

Fitting mathematical models to describe the influence of topographic factors and coexisting plants on wild jujube distribution was performed to provide a scientific basis for wild jujube forestation. Investigation quadrats, with straight-line distanc...

  • Article
  • Open Access
10 Citations
4,094 Views
20 Pages

A Quadratic–Exponential Model of Variogram Based on Knowing the Maximal Variability: Application to a Rainfall Time Series

  • Francisco Gerardo Benavides-Bravo,
  • Roberto Soto-Villalobos,
  • José Roberto Cantú-González,
  • Mario A. Aguirre-López and
  • Ángela Gabriela Benavides-Ríos

3 October 2021

Variogram models are a valuable tool used to analyze the variability of a time series; such variability usually entails a spherical or exponential behavior, and so, models based on such functions are commonly used to fit and explain a time series. Va...

  • Article
  • Open Access
15 Citations
4,639 Views
14 Pages

12 November 2020

The purpose of this study was to develop a formulation of Sunsik with improved health benefits by adding germinated wheat (GW) and herbal plant extract (HPE) using a response surface methodology (RSM). The central composite experimental design (CCD)...

  • Article
  • Open Access
5 Citations
4,121 Views
26 Pages

Statistics Learning Network Based on the Quadratic Form for SAR Image Classification

  • Chu He,
  • Bokun He,
  • Xinlong Liu,
  • Chenyao Kang and
  • Mingsheng Liao

1 February 2019

The convolutional neural network (CNN) has shown great potential in many fields; however, transferring this potential to synthetic aperture radar (SAR) image interpretation is still a challenging task. The coherent imaging mechanism causes the SAR si...

  • Article
  • Open Access
1 Citations
2,353 Views
13 Pages

29 August 2022

A hyphenated pressurized hot water—aqueous two-phase extraction (PHW-ATPE) method was applied to extract solasodine from Solanum mauritianum (S. mauritianum). A central composite design (CCD) was applied to determine the optimal conditions for...

  • Article
  • Open Access
309 Views
13 Pages

A large number of transits have been observed by TESS from the rapidly orbiting exoplanet 55 Cancri e. This amount of transit data, combined with the relatively high frequency of TESS observations, allows for a direct measurement of not only the plan...

  • Article
  • Open Access
5 Citations
2,202 Views
13 Pages

18 July 2023

The purpose of this work was to investigate the response of prostate cancer to different radiotherapy schedules, including hypofractionation, to evaluate potential departures from the linear–quadratic (LQ) response, to obtain the best-fitting p...

  • Article
  • Open Access
2,558 Views
17 Pages

19 September 2023

General linear modeling (GLM) has been widely employed to estimate the hemodynamic changes observed by functional near infrared spectroscopy (fNIRS) technology, which are found to be nonlinear rather than linear, however. Therefore, GLM might not be...

  • Feature Paper
  • Article
  • Open Access
4 Citations
2,247 Views
15 Pages

Envisaging the Intrinsic Departure from Zipf’s Law as an Indicator of Economic Concentration along Urban–Rural Gradients

  • Adele Sateriano,
  • Giovanni Quaranta,
  • Rosanna Salvia,
  • Francisco Escrivà Saneugenio,
  • Alvaro Marucci,
  • Luca Salvati,
  • Barbara Zagaglia and
  • Francesco Chelli

24 March 2024

A rank-size rule following Zipf’s law was tested along a complete urban–rural hierarchy in Greece using 2021 census data released at different administrative levels. Testing five econometric specifications (linear, quadratic, and cubic fo...

  • Article
  • Open Access
1 Citations
2,439 Views
13 Pages

Agronomic Behavior of Mexican Roselle Cultivars Produced under Protected Agricultural Conditions

  • Jeny Hinojosa-Gómez,
  • César San Martín-Hernández,
  • Tomás Osuna-Enciso,
  • José B. Heredia,
  • Josefina León-Félix and
  • María D. Muy-Rangel

19 October 2022

Growth dynamics and morphological traits are used to define the characteristics of roselle cultivars Hibiscus sabdariffa. The morpho–agronomic variability of plants was evaluated, as well as the concentration of macro and micronutrients in leav...

  • Article
  • Open Access
22 Citations
4,126 Views
15 Pages

Some Physical Properties and Mass Modelling of Pepper Berries (Piper nigrum L.), Variety Kuching, at Different Maturity Levels

  • Puteri Nurain Megat Ahmad Azman,
  • Rosnah Shamsudin,
  • Hasfalina Che Man and
  • Mohammad Effendy Ya’acob

19 October 2020

Pepper berry (Piper nigrum L.) is known as the king of spices and has sharp, pungent flavour and aroma. In this study, the physical properties (weight, dimensions, sphericity, volume, surface area, and projected area) were measured, and the mass of p...

  • Article
  • Open Access
10 Citations
3,645 Views
15 Pages

10 August 2021

This paper examines the dynamics of circulating hormone changes connected with reproduction in geese during the annual period related to gonad morphometry. One hundred geese were examined. The levels of prolactin (PRL), triiodothyronine (T3), thyroxi...

  • Article
  • Open Access
5 Citations
5,570 Views
10 Pages

Walkability and Fitness Center Prices, Opening Hours, and Extra Services: The Case of Madrid, Spain

  • Jairo León-Quismondo,
  • José Bonal,
  • Pablo Burillo and
  • Álvaro Fernández-Luna

Walkability has been associated with urban development and political plans, contributing to more connected cities with improvements in communication, shopping, and pedestrian base. Among these services, fitness centers are becoming important elements...

  • Article
  • Open Access
6 Citations
1,792 Views
19 Pages

23 October 2023

In order to investigate the influence of ambient temperature on the temperature field of coal gangue dumps governed by heat pipes (HPs), using self-developed heat pipe and intelligent cloud monitoring software, a 1-year field test was conducted in th...

  • Article
  • Open Access
3 Citations
2,162 Views
11 Pages

ZIF-8 as Potential Pesticide Adsorbent Medium for Wastewater Treatment: The Case Study of Model Linuron Extraction Conditions Optimization via Design of Experiment

  • Nicola di Nicola,
  • Mariacristina Di Pelino,
  • Martina Foschi,
  • Rosalba Passalacqua,
  • Andrea Lazzarini and
  • Fabrizio Ruggieri

The increasing presence of pesticide residues in aquatic environments poses a significant threat to ecosystems and human health, necessitating the development of effective removal technologies. In this study, Zeolitic Imidazolate Framework-8 (ZIF-8)...

  • Article
  • Open Access
1 Citations
1,679 Views
15 Pages

Vibrational Analysis of Natural Rhodochrosites by Raman Spectroscopy

  • Julliana F. Alves,
  • Linus Pauling F. Peixoto and
  • Luiz Fernando C. de Oliveira

11 July 2024

This study investigates an unusual behavior observed in the Raman spectra of natural rhodochrosites under ambient conditions and varying temperature and pressure. While the typical MnCO3 spectrum is maintained, the relative intensities of libration (...

  • Article
  • Open Access
1 Citations
1,604 Views
14 Pages

CSAPSO-BPNN-Based Modeling of End Airbag Stiffness of Nursing Transfer Robot

  • Teng Liu,
  • Xinlong Li,
  • Kaicheng Qi,
  • Zhong Zhang,
  • Yunxuan Xiao and
  • Shijie Guo

The use of nursing transfer robots is a vital solution to the problem of daily mobility difficulties for semi-disabilities. However, the fact that care-receivers have different physical characteristics leads to force concentration during human–...

  • Article
  • Open Access
4 Citations
3,996 Views
16 Pages

Information-Geometric Optimization with Natural Selection

  • Jakub Otwinowski,
  • Colin H. LaMont and
  • Armita Nourmohammad

31 August 2020

Evolutionary algorithms, inspired by natural evolution, aim to optimize difficult objective functions without computing derivatives. Here we detail the relationship between classical population genetics of quantitative traits and evolutionary optimiz...

  • Article
  • Open Access
2 Citations
1,898 Views
20 Pages

24 June 2023

To achieve river channel detection in SAR (synthetic aperture radar) images, we developed a level-set-based model (LSBM) guided by a designed data-fitting energy which is called the SoDEF (sum of dual exponential functions)-fitting energy. Firstly, w...

  • Article
  • Open Access
1 Citations
1,822 Views
11 Pages

25 March 2023

Adequate estimation of water demand in cattle production feed yards is of high importance, especially due to reduced water availability because of changes in rain precipitation patterns and amounts. The pen surface in feed yards receives and reflects...

  • Article
  • Open Access
4 Citations
3,992 Views
15 Pages

The contribution of this paper is to present an automatic emergency braking (AEB) optimized algorithm based on time to collision (TTC) and a professional driver fitting (PDF) braking pattern. When the TTC value is less than the given threshold, the P...

  • Communication
  • Open Access
2 Citations
2,209 Views
8 Pages

Implications of Experimental Design on Predicting Economic Optimum Nitrogen Rates in Rice

  • Richard Lee Atwill,
  • Larry Jason Krutz,
  • Gene Dave Spencer,
  • Jason A. Bond,
  • Kambham Raja Reddy,
  • Jeffrey Gore,
  • Timothy W. Walker and
  • Debbie Boykin

12 November 2021

Nitrogen (N) response studies in rice (Oryza sativa L.) are conducted to provide grower recommendations with economically optimum N rates (EONRs). This study was conducted to determine if experimental design alters the predicted EONR for rice. The ef...

  • Article
  • Open Access
2 Citations
3,989 Views
12 Pages

Hierarchical Transmuted Log-Logistic Model: A Subjective Bayesian Analysis

  • Carlos A. Dos Santos,
  • Daniele C. T. Granzotto,
  • Vera L. D. Tomazella and
  • Francisco Louzada

In this study, we propose to apply the transmuted log-logistic (TLL) model which is a generalization of log-logistic model, in a Bayesian context. The log-logistic model has been used it is simple and has a unimodal hazard rate, important characteris...

  • Article
  • Open Access
31 Citations
6,854 Views
14 Pages

Assessing Seasonality Variation with Harmonic Regression: Accommodations for Sharp Peaks

  • Kavitha Ramanathan,
  • Mani Thenmozhi,
  • Sebastian George,
  • Shalini Anandan,
  • Balaji Veeraraghavan,
  • Elena N. Naumova and
  • Lakshmanan Jeyaseelan

The use of the harmonic regression model is well accepted in the epidemiological and biostatistical communities as a standard procedure to examine seasonal patterns in disease occurrence. While these models may provide good fit to periodic patterns w...

  • Article
  • Open Access
427 Views
18 Pages

10 November 2025

Replicating runs in designed experiments is essential for unbiased error variance estimation, particularly when the fitted model may not account for all active effects. Definitive screening designs (DSDs), while offering orthogonality between main ef...

  • Article
  • Open Access
2,101 Views
15 Pages

16 April 2025

Background/Objectives: Clinical studies have shown a marked reduction in tumor control in prostate cancer treated with radically hypofractionated high-dose-rate brachytherapy (HDR-BT). The purpose of this study was to analyze the dose–response...

  • Article
  • Open Access
14 Citations
3,734 Views
13 Pages

Performance and Exhaust Emission Optimization of a Dual Fuel Engine by Response Surface Methodology

  • Raj Kumar Kamaraj,
  • Jinu Gowthami Thankachi Raghuvaran,
  • Arul Franco Panimayam and
  • Haiter Lenin Allasi

16 December 2018

A central composite face-centered design (CCFD) was employed to examine the optimal conditions for the compression ratio of the Sardine Fish Oil Methyl Ester (SFOME) blend to the Thermal cracked Cashew Shell Nut Liquid T-CSNL blend by simultaneously...

  • Proceeding Paper
  • Open Access
1,667 Views
7 Pages

Alternative models for the respiration rate (RR) of ready-to-eat strawberries were evaluated as a function of O2 and CO2 concentration and temperature. The effect of the gaseous atmosphere and temperature on RR was determined in a total factorial exp...

  • Article
  • Open Access
3 Citations
2,278 Views
21 Pages

To address the problems of the complex structure and single packing trajectory of a packing machine, a hybrid-driven, five-bar packing machine for same-point pickup and different points of release in unmanned plant factories was designed, and a GRA-C...

  • Article
  • Open Access
49 Citations
7,139 Views
21 Pages

10 September 2018

In order to exploit plants as environmental biosensors, previous researches have been focused on the electrical signal response of the plants to different environmental stimuli. One of the important outcomes of those researches has been the extractio...

  • Article
  • Open Access
4 Citations
3,491 Views
18 Pages

5 August 2022

Understanding the nonlinear dynamic characteristics of engineering structures is challenging, especially for the systems that exhibit asymmetric nonlinear behavior. This paper compared four parameter identification methods for asymmetric nonlinear sy...

  • Article
  • Open Access
18 Citations
2,393 Views
13 Pages

15 February 2022

We show that upon applying Palatini f(R), characterized by an αR2 term, within a scenario motivated by a temporal variation of strong coupling constant, then one obtains a quadratic kinetic energy. We do not drop this term, but rather study two...

  • Article
  • Open Access
31 Citations
4,464 Views
16 Pages

Prostate Cancer Incidence in U.S. Counties and Low Levels of Arsenic in Drinking Water

  • Jaeil Ahn,
  • Isabella J. Boroje,
  • Hamid Ferdosi,
  • Zachary J. Kramer and
  • Steven H. Lamm

Background: Although inorganic arsenic in drinking water at high levels (100s–1000s μg/L [ppb]) increases cancer risk (skin, bladder, lung, and possibly prostate), the evidence at lower levels is limited. Methods: We conducted an ecologic an...

  • Article
  • Open Access
15 Citations
3,872 Views
20 Pages

Optimization Method of the Solvothermal Parameters Using Box–Behnken Experimental Design—The Case Study of ZnO Structural and Catalytic Tailoring

  • Zoltán Kovács,
  • Csanád Molnár,
  • Urška Lavrenčič Štangar,
  • Vasile-Mircea Cristea,
  • Zsolt Pap,
  • Klara Hernadi and
  • Lucian Baia

ZnO photocatalysts were synthesized via solvothermal method and a reduced experimental design (Box–Behnken) was applied to investigate the influence of four parameters (temperature, duration, composition of the reaction mixture) upon the photocatalyt...

  • Article
  • Open Access
9 Citations
8,821 Views
14 Pages

31 December 2004

Valence topological charge-transfer (CT) indices are applied to the calculationof dipole moments. The algebraic and vector semisum CT indices are defined. Thecombination of CT indices allows the estimation of the dipole moments. The model isgeneraliz...

  • Article
  • Open Access
59 Citations
9,727 Views
18 Pages

High levels (> 200 µg/L) of inorganic arsenic in drinking water are known to be a cause of human lung cancer, but the evidence at lower levels is uncertain. We have sought the epidemiological studies that have examined the dose-response relationsh...

  • Article
  • Open Access
2,695 Views
11 Pages

Anaerobic Acidogenic Fermentation of Cellobiose by Immobilized Cells: Prediction of Organic Acids Production by Response Surface Methodology

  • Panagiota Tsafrakidou,
  • Konstantina Tsigkou,
  • Argyro Bekatorou,
  • Maria Kanellaki and
  • Athanasios A. Koutinas

19 August 2021

Response surface methodology was used to derive a prediction model for organic acids production by anaerobic acidogenic fermentation of cellobiose, using a mixed culture immobilized on γ-alumina. Three parameters (substrate concentration, temperature...

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