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2,339 Results Found

  • Article
  • Open Access
155 Citations
7,508 Views
10 Pages

Double Controlled Metric Type Spaces and Some Fixed Point Results

  • Thabet Abdeljawad,
  • Nabil Mlaiki,
  • Hassen Aydi and
  • Nizar Souayah

12 December 2018

In this article, in the sequel of extending b-metric spaces, we modify controlled metric type spaces via two control functions α ( x , y ) and μ ( x , y ) on the right-hand side of the b - triangle inequality, that is,...

  • Article
  • Open Access
3 Citations
1,636 Views
12 Pages

13 March 2023

We introduce the novel concept of (α-ψ)-fuzzy contractive mappings on fuzzy double-controlled metric spaces and demonstrate some fixed-point results. The theorems presented generalize some intriguing findings in the literature. Thus, we pro...

  • Article
  • Open Access
2 Citations
1,949 Views
12 Pages

24 April 2022

In this paper, we present a new type of rational contraction in double controlled metric-like spaces and improve recent results of such spaces. Moreover, there is an example to verify the correctness of our results. Finally, we also obtain some new f...

  • Article
  • Open Access
25 Citations
7,133 Views
16 Pages

20 June 2012

In this paper, a double-linear approximation algorithm (DLAA) to achieve maximum-power-point tracking (MPPT) for photovoltaic (PV) arrays is proposed. The DLAA is based on the approximation that the maximum power point varies linearly with irradiatio...

  • Article
  • Open Access
7 Citations
2,910 Views
19 Pages

This paper introduces a control method suitable for AUVs to transmit underwater radio energy that improves the stability of AUV charging under water based on double LCC compensation. The coupling coefficient decreases with the rise of the coil offset...

  • Article
  • Open Access
12 Citations
2,378 Views
17 Pages

24 November 2023

This paper proposes a sliding mode synchronous control approach to enhance the position synchronization performance and anti-interference capability of a double lifting point hydraulic hoist. Building upon the cross-coupling synchronous control metho...

  • Article
  • Open Access
6 Citations
4,451 Views
14 Pages

Introduction of the Double-Differenced Ambiguity Resolution into Precise Point Positioning

  • Haojun Li,
  • Jingxin Xiao,
  • Shoujian Zhang,
  • Jin Zhou and
  • Jiexian Wang

9 November 2018

According to the advantages of the precise point positioning (PPP) and the double-differenced (DD) model based algorithm, a new method for the integration of DD integer ambiguity resolution into PPP is presented. This method uses the undifferenced am...

  • Article
  • Open Access
3 Citations
2,539 Views
10 Pages

Optimization of Spot Efficiency of Double-Helix Point Spread Function and Its Application in Intracellular Imaging

  • Jun Yang,
  • Hanliang Du,
  • Zhenhao Chai,
  • Lei Zhang,
  • Ben Q. Li,
  • Jianlei Cui and
  • Xuesong Mei

9 February 2022

The nano-scale spatial positioning of nanoparticles in tumor cells can be achieved through the double-helix point spread functions (DH-PSF). Nevertheless, certain issues such as low light intensity concentration of the main lobes, the influence of th...

  • Article
  • Open Access
1 Citations
4,884 Views
12 Pages

A New Maximum Power Point Estimator Control Strategy to Maximize Output Power of the Double Stator Permanent Magnet Generator

  • Norhisam Misron,
  • Chockalingam Aravind Vaithilingam,
  • Nashiren Farzilah Mailah,
  • Kudo Masaya and
  • Tsuyoshi Hanamoto

17 August 2016

A new control estimator to maximize the power generated with a maximum power point estimator is introduced. The power mapping characteristics from the double-stator generator are modeled as a mathematical equation which is used to develop the estimat...

  • Article
  • Open Access
627 Views
11 Pages

31 August 2025

This paper proposes an approach to identify interacting objects (IOs) and determine their interaction losses (ILs) using point cloud data from wide-band double-directional channel sounding data. The scattering points (SPs) were identified using the m...

  • Article
  • Open Access
531 Views
18 Pages

15 August 2025

Hydraulic concrete is prone to cracking and interactive propagation under complex stress, threatening its structural integrity and service life. To address limitations of traditional numerical methods (e.g., mesh dependency in FEM) and imprecision of...

  • Feature Paper
  • Article
  • Open Access
178 Views
26 Pages

27 November 2025

We study the Hilbert function of a union of a fixed set of double points and a prescribed number of general double points. Our main results are for double points of Veronese varieties and of Segre–Veronese varieties. Among the Segre–Veron...

  • Article
  • Open Access
423 Views
18 Pages

16 October 2025

Exceptional points (EPs), as spectral singularities unique to non-Hermitian systems, have been extensively studied in PT-symmetric frameworks. This work constructs a non-PT-symmetric coupled waveguide array, successfully observes multiple EPs and rev...

  • Article
  • Open Access
680 Views
24 Pages

3 July 2025

Starting from the basic form of GN-authenticated key agreement (GN-AK), the current research proposes an improved protocol by integrating a new scalar multiplication technique based on a dual-base chain representation with bases 1/2 and 3. This repre...

  • Article
  • Open Access
8 Citations
4,907 Views
15 Pages

30 December 2020

The microstructural origin of the double yield points of metallocene linear low-density polyethylene (mLLDPE) precursor films has been studied with the assistance of the synchrotron radiation small- and wide-angle X-ray scattering (SAXS/WAXS). It has...

  • Article
  • Open Access
2,567 Views
16 Pages

6 December 2021

We prove a base point freeness result for linear systems of forms vanishing at general double points of the projective plane. For tensors we study the uniqueness problem for the representation of a tensor as a sum of terms corresponding to points and...

  • Article
  • Open Access
2 Citations
2,331 Views
29 Pages

17 January 2022

In this article, we addressed the question of whether the Gospel’s double antisymmetry can be found in reality as such and especially in Western society, which has obviously made developments in its history. Based on the conceptual analysis of...

  • Article
  • Open Access
2 Citations
1,506 Views
16 Pages

Common Fixed Point Results on a Double-Controlled Metric Space for Generalized Rational-Type Contractions with Application

  • Khaleel Ahmad,
  • Ghulam Murtaza,
  • Salha Alshaikey,
  • Umar Ishtiaq and
  • Ioannis K. Argyros

30 September 2023

In this manuscript, we prove several common fixed point theorems for generalized rational-type contraction mappings under several conditions in the context of double-controlled metric spaces. Further, we utilize a double-controlled metric space equip...

  • Article
  • Open Access
8 Citations
5,322 Views
15 Pages

8 August 2019

Embankments are usually constructed along rivers as a defense structure against flooding. Overtopping failure can cause devastating and fatal consequences to life and property of surrounding areas. This motivates researchers to study the formation, p...

  • Article
  • Open Access
39 Citations
4,215 Views
17 Pages

14 November 2019

The present article is devoted to examine the significance of double stratification in third grade stagnation point flow towards a radiative stretching cylinder. The stagnation point is discussed categorically. Analysis is scrutinized in the presence...

  • Article
  • Open Access
6 Citations
2,596 Views
15 Pages

27 September 2022

The present paper makes use of the efficient double decomposition method to propose a method for solving two-point boundary-value problems, featuring second- and higher-order nonlinear ordinary differential equations. The efficacy of the proposed met...

  • Article
  • Open Access
19 Citations
2,085 Views
18 Pages

Graphical Views of Intuitionistic Fuzzy Double-Controlled Metric-Like Spaces and Certain Fixed-Point Results with Application

  • Umar Ishtiaq,
  • Naeem Saleem,
  • Fahim Uddin,
  • Salvatore Sessa,
  • Khaleel Ahmad and
  • Ferdinando di Martino

9 November 2022

In this article, we establish the concept of intuitionistic fuzzy double-controlled metric-like spaces by “assuming that the self-distance may not be zero”; if the value of the metric is zero, then it has to be “a self-distance&rdqu...

  • Communication
  • Open Access
2 Citations
3,848 Views
13 Pages

7 November 2023

The precise point positioning (PPP) technique generally takes tens of minutes to converge, severely limiting its use. This longer convergence time is mainly due to the slower variation of satellite geometry in space and the stronger correlation of un...

  • Article
  • Open Access
10 Citations
6,102 Views
10 Pages

Biological Evaluation of Double Point Modified Analogues of 1,25-Dihydroxyvitamin D2 as Potential Anti-Leukemic Agents

  • Aoife Corcoran,
  • Sharmin Nadkarni,
  • Kaori Yasuda,
  • Toshiyuki Sakaki,
  • Geoffrey Brown,
  • Andrzej Kutner and
  • Ewa Marcinkowska

Structurally similar double-point modified analogues of 1,25-dihydroxyvitamin D2 (1,25D2) were screened in vitro for their pro-differentiating activity against the promyeloid cell line HL60. Their affinities towards human full length vitamin D recept...

  • Article
  • Open Access
16 Citations
3,514 Views
15 Pages

Crop density estimation ahead of the combine harvester provides a valuable reference for operators to keep the feeding amount stable in agriculture production, and, as a consequence, guaranteeing the working stability and improving the operation effi...

  • Article
  • Open Access
2 Citations
6,407 Views
11 Pages

Improving Woody Biomass Estimation Efficiency Using Double Sampling

  • David L. Parrott,
  • John M. Lhotka,
  • Songlin Fei and
  • B. Scott Shouse

3 May 2012

Although double sampling has been shown to be an effective method to estimate timber volume in forest inventories, only a limited body of research has tested the effectiveness of double sampling on forest biomass estimation. From forest biomass inven...

  • Article
  • Open Access
12 Citations
2,269 Views
17 Pages

20 October 2022

In this manuscript, we defined (α, F)-contractions in the context of double-controlled metric spaces and partially ordered double-controlled metric spaces. We established new fixed-point results and defined the notion of double-controlled metri...

  • Article
  • Open Access
26 Citations
6,359 Views
16 Pages

Antiproliferative Activity of Double Point Modified Analogs of 1,25-Dihydroxyvitamin D2 Against Human Malignant Melanoma Cell Lines

  • Anna Piotrowska,
  • Justyna Wierzbicka,
  • Sharmin Nadkarni,
  • Geoffrey Brown,
  • Andrzej Kutner and
  • Michał A. Żmijewski

Vitamin D is a lipid soluble steroid hormone with pleiotropic biological properties, including regulation of cell proliferation, differentiation and apoptosis. As to these desirable anticancer actions, 1,25-dihydroxyvitamins D and analogs have been r...

  • Article
  • Open Access
5 Citations
2,103 Views
14 Pages

30 August 2022

Entire surface point clouds in complex objects cannot be captured in a single direction by using noncontact measurement methods, such as machine vision; therefore, different direction point clouds should be obtained and registered. However, high effi...

  • Article
  • Open Access
2,349 Views
19 Pages

15 July 2022

This paper studies the grey target evaluation model of science and technology talents by drawing on the ‘dominant-implicit’ double reference point. Input and output perspectives are adopted and developed to establish a dominant reference...

  • Feature Paper
  • Article
  • Open Access
1 Citations
996 Views
16 Pages

Transmitting Double-D Coil to Wirelessly Recharge the Battery of a Drone with a Receiving Coil Integrated in the Landing Gear

  • Wassim Boumerdassi,
  • Tommaso Campi,
  • Silvano Cruciani,
  • Francesca Maradei and
  • Mauro Feliziani

16 May 2025

The aim of this work is the design of a 200 W transmitting coil for a high-power wireless power transfer (WPT) system based on magnetic resonant coupling (MRC) to charge the battery of a drone in 1 h equipped with a WPT receiving coil integrated into...

  • Article
  • Open Access
5 Citations
2,297 Views
21 Pages

Revealing the interface effect on lubrication is great significance for designing high performance water-based lubricating friction pairs. In this study, a new thin film lubrication numerical model considering the electrical double layer (EDL) effect...

  • Article
  • Open Access
2 Citations
2,322 Views
14 Pages

30 April 2025

This study introduces a cutting-edge, aptamer-based, planar electric, double-layer field-effect transistor (FET) system that offers both high sensitivity and specificity for the detection of troponin I (TnI). The proposed sensing platform leverages t...

  • Article
  • Open Access
2 Citations
574 Views
12 Pages

14 April 2025

This study explores the existence and multiplicity of weak solutions for a double-phase elliptic problem with nonlocal interactions, formulated as a Dirichlet boundary value problem. The associated differential operator exhibits two distinct phases g...

  • Article
  • Open Access
13 Citations
5,297 Views
30 Pages

5 April 2022

Low signal-to-noise ratio (SNR) infrared point target detection and tracking is crucial to study regarding infrared remote sensing. In the low-SNR images, the intensive noise will submerge targets. In this letter, a saliency-guided double-stage parti...

  • Feature Paper
  • Article
  • Open Access
820 Views
20 Pages

30 July 2025

In this article, we study a double-phase variable-exponent Kirchhoff problem and show the existence of at least three solutions. The proposed model, as a generalization of the Kirchhoff equation, is interesting since it is driven by a double-phase op...

  • Article
  • Open Access
4 Citations
3,721 Views
11 Pages

18 October 2021

This study compares the absolute and relative stabilities of a novel hybrid dorsal double plating (HDDP) to the often-used dorsal double plating (DDP) under distal radius fracture. The “Y” shape profile with 1.6 mm HDDP thickness was obtained by comb...

  • Article
  • Open Access
7 Citations
4,003 Views
22 Pages

Improved Oriented Object Detection in Remote Sensing Images Based on a Three-Point Regression Method

  • Falin Wu,
  • Jiaqi He,
  • Guopeng Zhou,
  • Haolun Li,
  • Yushuang Liu and
  • Xiaohong Sui

10 November 2021

Object detection in remote sensing images plays an important role in both military and civilian remote sensing applications. Objects in remote sensing images are different from those in natural images. They have the characteristics of scale diversity...

  • Article
  • Open Access
3 Citations
2,920 Views
16 Pages

Lookup Table-Based Design of Scalar Multiplication for Elliptic Curve Cryptography

  • Yan-Duan Ning,
  • Yan-Haw Chen,
  • Cheng-Sin Shih and
  • Shao-I Chu

This paper is aimed at using a lookup table method to improve the scalar multiplication performance of elliptic curve cryptography. The lookup table must be divided into two polynomials and requires two iterations of point doubling operation, for whi...

  • Article
  • Open Access
1 Citations
1,845 Views
19 Pages

Double-Controlled Quasi M-Metric Spaces

  • Irshad Ayoob,
  • Ng Zhen Chuan and
  • Nabil Mlaiki

10 April 2023

One of the well-studied generalizations of a metric space is known as a partial metric space. The partial metric space was further generalized to the so-called M-metric space. In this paper, we introduce the Double-Controlled Quasi M-metric space as...

  • Article
  • Open Access
540 Views
20 Pages

A Double Inertial Mann-Type Method for Two Nonexpansive Mappings with Application to Urinary Tract Infection Diagnosis

  • Krittin Naravejsakul,
  • Pasa Sukson,
  • Waragunt Waratamrongpatai,
  • Phatcharapon Udomluck,
  • Mallika Khwanmuang,
  • Watcharaporn Cholamjiak and
  • Watcharapon Yajai

23 July 2025

This study proposes a double inertial technique integrated with the Mann algorithm to address the fixed-point problem. Our method is further employed to tackle the split-equilibrium problem and perform classification using a urinary tract infection d...

  • Review
  • Open Access
31 Citations
8,768 Views
22 Pages

Progress in Gene-Editing Technology of Zebrafish

  • Yanling Li,
  • Zhipeng Jia,
  • Shuchao Zhang and
  • Xiaozhen He

1 September 2021

As a vertebrate model, zebrafish (Danio rerio) plays a vital role in the field of life sciences. Recently, gene-editing technology has become increasingly innovative, significantly promoting scientific research on zebrafish. However, the implementati...

  • Article
  • Open Access
712 Views
23 Pages

Pulsed CO2 Laser-Fabricated Cascades of Double Resonance Long Period Gratings for Sensing Applications

  • Tinko Eftimov,
  • Sanaz Shoar Ghaffari,
  • Georgi Dyankov,
  • Veselin Vladev and
  • Alla Arapova

20 August 2025

We present a detailed theoretical and experimental study of cascaded double resonance long period gratings (C DR LPGs) for fabricated sensing applications. The matrix description of cascaded LPGs is presented, and several important particular cases a...

  • Article
  • Open Access
4 Citations
1,990 Views
31 Pages

4 November 2024

Fracture tests are a necessary means to obtain the fracture properties of concrete, which are crucial material parameters for the fracture analysis of concrete structures. This study aims to fill the gap of insufficient test results on the fracture t...

  • Article
  • Open Access
3 Citations
4,398 Views
8 Pages

Development and Testing of a Compact Autorefractor Based on Double-Pass Imaging

  • Linus Emmerich,
  • Arne Ohlendorf,
  • Alexander Leube,
  • Nikolai Suchkov and
  • Siegfried Wahl

29 December 2022

Autorefraction is an objective way to determine the refractive error of the eye, without the need for feedback by the patient or a well-educated practitioner. To make refractive measurements more accessible in the background of the growing prevalence...

  • Article
  • Open Access
5 Citations
4,785 Views
22 Pages

1 January 2023

As an effective solution for data visualization and analysis, the large-scale high-resolution display wall system has been widely used in various scientific research fields. On the basis of investigating existing system cases and research results, th...

  • Communication
  • Open Access
4 Citations
4,906 Views
11 Pages

31 October 2023

Computing-in-Memory (CIM) is a novel computing architecture that enormously improves energy efficiency and reduces computing latency by avoiding frequent data movement between the computation and memory units. Currently, digital CIM is regarded as mo...

  • Article
  • Open Access
8 Citations
5,414 Views
14 Pages

Effect of Gibberellic Acid on Growing-Point Development of Non-Vernalized Wheat Plants under Long-Day Conditions

  • Milan Skalicky,
  • Jan Kubes,
  • Pavla Vachova,
  • Shokoofeh Hajihashemi,
  • Jaroslava Martinkova and
  • Vaclav Hejnak

9 December 2020

The goal of this study was to determine whether the application of gibberellic acid (GA3) to seeds of common wheat varieties with different vernalization and photoperiod requirements affects the transition from vegetative to generative stage. Three v...

  • Article
  • Open Access
7 Citations
2,592 Views
12 Pages

DC Aging Mechanism of Co2O3-Doped ZnO Varistors

  • Xia Zhao,
  • Haibin Shen,
  • Men Guo,
  • Ziming He,
  • Yupeng Li and
  • Ran Wen

3 July 2021

Lowered power loss and asymmetrically electrical parameters are reported in the DC aging of Co2O3-doped ZnO varistors in this paper. Based on the frequency domain dielectric responses of the pristine and degraded samples, the present study explores t...

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