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50 Results Found

  • Article
  • Open Access
8 Citations
2,868 Views
45 Pages

30 March 2021

In this work, a new algorithm is proposed for a unique representation for simple and multiple joint planar kinematic chains (KCs) having any degree of freedom (DOF). This unique representation of KCs enhances the isomorphism detection during the stru...

  • Article
  • Open Access
3 Citations
4,570 Views
29 Pages

5 March 2021

Rural economic development helps reduce the income inequality in China. Existing studies show the positive effects of rural reforms, however, whether the rural credit cooperative’s shareholding reform promotes rural economic development and whether e...

  • Article
  • Open Access
6 Citations
4,736 Views
15 Pages

Effect of Inoculant Alloy Selection and Particle Size on Efficiency of Isomorphic Inoculation of Ti-Al

  • Jacob R. Kennedy,
  • Bernard Rouat,
  • Dominique Daloz,
  • Emmanuel Bouzy and
  • Julien Zollinger

25 April 2018

The process of isomorphic inoculation relies on precise selection of inoculant alloys for a given system. Three alloys, Ti-10Al-25Nb, Ti-25Al-10Ta, and Ti-47Ta (at %) were selected as potential isomorphic inoculants for a Ti-46Al alloy. The binary Ti...

  • Article
  • Open Access
1 Citations
6,430 Views
12 Pages

Metallic One-Dimensional Conductors Composed of Axially Ligated (Phthalocyanato)CoIII with Supramolecular Cations of A(EtOH)4 (A = Na and K)

  • Yasuhiro Tanaka,
  • Manabu Ishikawa,
  • Naoko Watanabe,
  • Yukihiro Takahashi,
  • Toshio Naito and
  • Tamotsu Inabe

10 July 2012

Electrolysis of Na and K salts of the anion dicyano(phthalocyaninato)cobalt(III) (Co(Pc)(CN)2) in ethanol yields one-dimensional partially oxidized salts of A[Co(Pc)(CN)2]2.4(EtOH) (A = Na and K). The cationic component is the supramolecular cation [...

  • Article
  • Open Access
9 Citations
2,431 Views
16 Pages

15 June 2021

In this work, we study links between first-order formulas and arbitrary properties for families of theories, classes of structures and their isomorphism types. Possibilities for ranks and degrees for formulas and theories with respect to the given pr...

  • Article
  • Open Access
1 Citations
1,004 Views
23 Pages

Soft modular biomimetic robots, driven by flexible actuators, are extensively used in various fields due to their excellent flexibility, environmental adaptability, and isomorphism. However, existing flexible modules typically possess no more than tw...

  • Article
  • Open Access
10 Citations
5,239 Views
17 Pages

14 April 2018

A novel topology optimization approach is proposed in this paper for the design of three rotational degree-of-freedom (DOF) spatially compliant mechanisms, combining the Jacobian isomorphic mapping matrix with the solid isotropic material with penali...

  • Article
  • Open Access
1,902 Views
23 Pages

16 October 2021

As the kinematic structure of an articulated manipulator affects the characteristics of its motion, rigidity, vibration, and force transmissibility, finding the most suitable kinematic structure for the desired task is important in the conceptual des...

  • Article
  • Open Access
16 Citations
12,046 Views
17 Pages

18 February 2013

The maximum common connected edge subgraph problem is to find a connected graph with the maximum number of edges that is isomorphic to a subgraph of each of the two input graphs, where it has applications in pattern recognition and chemistry. This pa...

  • Article
  • Open Access
1 Citations
2,052 Views
16 Pages

YAG:Ce Nanophosphors Synthesized by the Polymer–Salt Method for White LEDs with Isomorphic Substitution of Yttrium by Gadolinium

  • Dmitry V. Bulyga,
  • Diana A. Gavrilova,
  • Sergey K. Evstropiev,
  • Irina A. Arefina,
  • Maxim K. Myagkih and
  • Andrey A. Shelemanov

26 July 2023

Fine-dispersed YGdAG:Ce nanopowders with various degrees of isomorphic substitution of yttrium by gadolinium were synthesized. The structure and luminescent properties were studied by X-ray diffraction, attenuated total reflection Fourier-transform i...

  • Article
  • Open Access
23 Citations
4,743 Views
22 Pages

Bipolar Picture Fuzzy Graphs with Application

  • Waheed Ahmad Khan,
  • Babir Ali and
  • Abdelghani Taouti

4 August 2021

In this manuscript, we introduce and discuss the term bipolar picture fuzzy graphs along with some of its fundamental characteristics and applications. We also initiate the concepts of complete bipolar picture fuzzy graphs and strong bipolar picture...

  • Article
  • Open Access
34 Citations
2,706 Views
8 Pages

17 January 2022

Let G be a graph with a minimum degree δ of at least two. The inclusion chromatic index of G, denoted by χ⊂′(G), is the minimum number of colors needed to properly color the edges of G so that the set of colors incident with any v...

  • Article
  • Open Access
4 Citations
2,495 Views
15 Pages

16 April 2021

The number of actuators of an underactuated robot is less than its degree of freedom. In other words, underactuated robots can be designed with fewer actuators than fully actuated ones. Although an underactuated robot is more complex than a fully act...

  • Article
  • Open Access
1 Citations
2,369 Views
18 Pages

A New Approach to Determine the Minimal Polynomials of Binary Modified de Bruijn Sequences

  • Musthofa,
  • Indah Emilia Wijayanti,
  • Diah Junia Eksi Palupi and
  • Martianus Frederic Ezerman

25 July 2022

A binary modified de Bruijn sequence is an infinite and periodic binary sequence derived by removing a zero from the longest run of zeros in a binary de Bruijn sequence. The minimal polynomial of the modified sequence is its unique least-degree chara...

  • Feature Paper
  • Article
  • Open Access
571 Views
27 Pages

8 September 2025

Two hybrid, entropy-guided node metrics are proposed for the k-hop environment: Entropy-Weighted Redundancy (EWR) and Normalized Entropy Density (NED). The central idea is to couple local Shannon entropy with neighborhood density/redundancy so that s...

  • Article
  • Open Access
1,096 Views
19 Pages

Exhaustive Enumeration of Spatial Prime Structures

  • Takahiro Aruga and
  • Nobuyuki Iwatsuki

2 August 2024

Prime structures are link chains with 0 DoF (degrees of freedom), not including subchains with 0 or fewer DoF, which are expected to be used in systematic kinematic and dynamic analyses of link mechanisms. This paper describes the exhaustive enumerat...

  • Article
  • Open Access
7 Citations
6,317 Views
22 Pages

Copper-Containing Magnesioferrite in Vesicular Trachyandesite in a Lava Tube from the 2012–2013 Eruption of the Tolbachik Volcano, Kamchatka, Russia

  • Victor V. Sharygin,
  • Vadim S. Kamenetsky,
  • Liudmila M. Zhitova,
  • Alexander B. Belousov and
  • Adam Abersteiner

8 November 2018

Cu-rich magnesioferrite was found in vesicular basaltic trachyandesite in one of lava tubes (Duplex) that formed during the 2012–2013 eruption of the Tolbachik volcano, Kamchatka. This mineral is commonly associated with hematite, tenorite, hal...

  • Article
  • Open Access
8 Citations
3,480 Views
10 Pages

On the Metric Dimension of Arithmetic Graph of a Composite Number

  • Shahid ur Rehman,
  • Muhammad Imran and
  • Imran Javaid

11 April 2020

This paper is devoted to the study of the arithmetic graph of a composite number m, denoted by A m . It has been observed that there exist different composite numbers for which the arithmetic graphs are isomorphic. It is proved that the maximu...

  • Article
  • Open Access
2 Citations
4,735 Views
11 Pages

Solvent Dependent Disorder in M2(BzOip)2(H2O)·Solvate (M = Co or Zn)

  • Laura J. McCormick,
  • Samuel A. Morris,
  • Simon J. Teat,
  • Alexandra M.Z. Slawin and
  • Russell E. Morris

24 December 2017

Coordination polymers derived from 5-benzyloxy isophthalic acid (H2BzOip) are rare, with only three reported that do not contain additional bridging ligands, of which two M2(BzOip)2(H2O) (M = Co and Zn) are isomorphous. It was hoped that by varying t...

  • Article
  • Open Access
22 Citations
3,345 Views
31 Pages

25 December 2022

A topological index (TI) is a real number that defines the relationship between a chemical structure and its properties and remains invariant under graph isomorphism. TIs defined for chemical structures are capable of predicting physical properties,...

  • Article
  • Open Access
1,590 Views
10 Pages

24 September 2024

A vertex-degree-based topological index φ associates a real number to a graph G which is invariant under graph isomorphism. It is defined in terms of the degrees of the vertices of G and plays an important role in chemical graph theory, especiall...

  • Article
  • Open Access
6 Citations
2,708 Views
21 Pages

5 November 2020

We study the group of transformations of 4F3 hypergeometric functions evaluated at unity with one unit shift in parameters. We reveal the general form of this family of transformations and its group property. Next, we use explicitly known transformat...

  • Article
  • Open Access
1 Citations
1,566 Views
9 Pages

18 September 2023

The interplays between topology and algebraic geometry present a set of interesting properties. In this paper, we comprehensively revisit the Bézout theorem in terms of topology, and we present a topological proof of the theorem considering n-...

  • Article
  • Open Access
1,020 Views
11 Pages

21 February 2025

The generalized matrix of a graph G is defined as M(G)=A(G)−tD(G) (t∈R, and A(G) and D(G), respectively, denote the adjacency matrix and the degree matrix of G), and the generalized characteristic polynomial of G is merely the characterist...

  • Article
  • Open Access
4 Citations
2,817 Views
13 Pages

16 February 2023

In this paper, the chemical composition and spectroscopy of 38 violet-red to orange-red spinel samples were analyzed by energy dispersive X-ray fluorescence spectrometer and UV-visible spectrophotometer, based on CIE LAB color space, to explore the e...

  • Article
  • Open Access
14 Citations
2,896 Views
23 Pages

7 August 2020

Gutman and Trinajstić (1972) defined the connection-number based Zagreb indices, where connection number is degree of a vertex at distance two, in order to find the electron energy of alternant hydrocarbons. These indices remain symmetric for the iso...

  • Article
  • Open Access
19 Citations
6,682 Views
36 Pages

MultiAspect Graphs: Algebraic Representation and Algorithms

  • Klaus Wehmuth,
  • Éric Fleury and
  • Artur Ziviani

25 December 2016

We present the algebraic representation and basic algorithms for MultiAspect Graphs (MAGs). A MAG is a structure capable of representing multilayer and time-varying networks, as well as higher-order networks, while also having the property of being i...

  • Article
  • Open Access
1 Citations
949 Views
20 Pages

Electroplating Composite Coatings of Nickel with Dispersed WO3 and MoO3 on Al Substrate to Increase Wear Resistance

  • Petr Osipov,
  • Roza Shayakhmetova,
  • Danatbek Murzalinov,
  • Azamat Sagyndykov,
  • Ainur Kali,
  • Anar Mukhametzhanova,
  • Galymzhan Maldybayev and
  • Konstantin Mit

13 June 2025

Investigations of the synthesis of multicomponent coatings and their subsequent application to metal substrates to increase the wear resistance of materials is relevant for industry. Nickel compounds obtained from oxidized magnesia-iron nickel ores w...

  • Article
  • Open Access
2 Citations
1,885 Views
10 Pages

On Spectral Characterization of Two Classes of Unicycle Graphs

  • Jun Yin,
  • Haixing Zhao,
  • Xiujuan Ma and
  • Jing Liang

12 June 2022

Let G be a graph with n vertices, let A(G) be an adjacency matrix of G and let PA(G,λ) be the characteristic polynomial of A(G). The adjacency spectrum of G consists of eigenvalues of A(G). A graph G is said to be determined by its adjacency s...

  • Article
  • Open Access
28 Citations
5,248 Views
20 Pages

A Study of Regular and Irregular Neutrosophic Graphs with Real Life Applications

  • Liangsong Huang,
  • Yu Hu,
  • Yuxia Li,
  • P. K. Kishore Kumar,
  • Dipak Koley and
  • Arindam Dey

17 June 2019

Fuzzy graph theory is a useful and well-known tool to model and solve many real-life optimization problems. Since real-life problems are often uncertain due to inconsistent and indeterminate information, it is very hard for an expert to model those p...

  • Article
  • Open Access
13 Citations
4,665 Views
14 Pages

15 April 2024

Glass properties play crucial roles in ensuring the safety and reliability of electronic packaging. However, challenges, such as thermal expansion and resistance to acid corrosion, pose long-term service difficulties. This study investigated the impa...

  • Article
  • Open Access
42 Citations
5,164 Views
20 Pages

2 February 2020

In this paper, we propose a novel method to precisely match two aerial images that were obtained in different environments via a two-stream deep network. By internally augmenting the target image, the network considers the two-stream with the three i...

  • Article
  • Open Access
1 Citations
1,773 Views
14 Pages

14 January 2024

The formulations of polynomials over a topological simplex combine the elements of topology and algebraic geometry. This paper proposes the formulation of simplicial polynomials and the properties of resulting topological manifolds in two classes, no...

  • Article
  • Open Access
5 Citations
2,200 Views
9 Pages

On Trees with Given Independence Numbers with Maximum Gourava Indices

  • Ying Wang,
  • Adnan Aslam,
  • Nazeran Idrees,
  • Salma Kanwal,
  • Nabeela Iram and
  • Asima Razzaque

22 January 2023

In mathematical chemistry, molecular descriptors serve an important role, primarily in quantitative structure–property relationship (QSPR) and quantitative structure–activity relationship (QSAR) studies. A topological index of a molecular...

  • Feature Paper
  • Article
  • Open Access
1 Citations
2,013 Views
20 Pages

2 June 2024

In this work, the dynamics of a quantum walker on glued trees is revisited to understand the influence of the architecture of the graph on the efficiency of the transfer between the two roots. Instead of considering regular binary trees, we focus our...

  • Article
  • Open Access
3 Citations
3,461 Views
22 Pages

18 January 2023

In a basis of the space-time coordinate frame four quaternions discovered by Hamilton can be used. For subsequent reproduction of the coordinate frame these four quaternions are expanded to four 4 × 4 matrices with real-valued matrix coefficien...

  • Article
  • Open Access
7 Citations
2,777 Views
14 Pages

On r-Noncommuting Graph of Finite Rings

  • Rajat Kanti Nath,
  • Monalisha Sharma,
  • Parama Dutta and
  • Yilun Shang

19 September 2021

Let R be a finite ring and r∈R. The r-noncommuting graph of R, denoted by ΓRr, is a simple undirected graph whose vertex set is R and two vertices x and y are adjacent if and only if [x,y]≠r and [x,y]≠−r. In this paper, we obtain expressions for vert...

  • Article
  • Open Access
1 Citations
1,888 Views
15 Pages

A Design Methodology for Dual-Mode Electro-Mechanical Transmission Scheme Based on Jointing Characteristics

  • Xueliang Li,
  • Xinyu Kang,
  • Xin Ba,
  • Zengxiong Peng,
  • Shujun Yang and
  • Zhifu Zhao

28 July 2022

Electro-mechanical transmission is the best choice for the transmission system of military, engineering and other heavy special vehicles. The scheme design is fundamental and key to realize the original innovation of the electro-mechanical transmissi...

  • Article
  • Open Access
5 Citations
2,599 Views
26 Pages

Dynamic Evaluation of Traffic Noise through Standard and Multifractal Models

  • Alina Petrovici,
  • Jose Luis Cueto,
  • Valentin Nedeff,
  • Enrique Nava,
  • Florin Nedeff,
  • Ricardo Hernandez,
  • Carmen Bujoreanu,
  • Stefan Andrei Irimiciuc and
  • Maricel Agop

11 November 2020

Traffic microsimulation models use the movement of individual driver-vehicle-units (DVUs) and their interactions, which allows a detailed estimation of the traffic noise using Common Noise Assessment Methods (CNOSSOS). The Dynamic Traffic Noise Asses...

  • Article
  • Open Access
16 Citations
7,504 Views
25 Pages

19 November 2020

Although climate finance tools like green bonds have been gaining popularity in academia, the research has been limited to examining the financial viability and performance of this market. We explore a different research avenue related to institution...

  • Article
  • Open Access
986 Views
14 Pages

Siderite Decomposition Kinetics—Influence of Time, Temperature, and Isomorphous Impurities

  • Mariola Kądziołka-Gaweł,
  • Zdzisław Adamczyk,
  • Dariusz Łukowiec,
  • Joanna Klimontko,
  • Marcin Wojtyniak and
  • Jacek Nowak

19 April 2025

Siderite (FeCO3) is an iron-bearing carbonate mineral that is the most abundant sedimentary iron formation on Earth. The influence of time, temperature, and isomorphous impurities on the kinetics of siderite decomposition in air was studied using M&o...

  • Review
  • Open Access
1 Citations
1,977 Views
26 Pages

7 August 2021

In this review, we revisit our approach to constructing an effective theory for Abelian and Non-Abelian gauge theories in 4D. Our goal is to have an effective theory that provides a simple classical picture of the main qualitatively important feature...

  • Article
  • Open Access
7 Citations
2,299 Views
32 Pages

4 June 2023

Molecular descriptors are essential in mathematical chemistry for studying quantitative structure–property relationships (QSPRs), and topological indices are a valuable source of information about molecular properties, such as size, cyclicity,...

  • Feature Paper
  • Article
  • Open Access
389 Views
17 Pages

29 October 2025

The classical fiber product in algebraic geometry provides a powerful tool for studying loci where two morphisms to a base scheme, ϕ:X→S and ψ:Y→S, coincide exactly. This condition of strict equality, however, is insufficient for d...

  • Article
  • Open Access
637 Views
18 Pages

Study of the Process of Sorption of Iron and Copper from Sulfuric Acid in Their Joint Presence by Natural Zeolite

  • Raushan Kaiynbayeva,
  • Raissa Chernyakova,
  • Gita Sultanbayeva,
  • Nazym Kozhabekova,
  • Umirzak Jussipbekov and
  • Ersin Tussupkaliyev

22 May 2025

The most promising method for the purification of concentrated technical sulfuric acid is the purification sorption method, which is the most effective and innovative, using a natural sorbent. Study of the process of sorption of iron and copper catio...

  • Article
  • Open Access
531 Views
10 Pages

Ion Substitution Behavior and Chromatographic Study of “Ya’an Green” Seal Stone

  • Yicong Sun,
  • Yigeng Wang,
  • Zixuan Wang,
  • Zheng Zhang,
  • Mingming Xie,
  • Zhuchun Peng,
  • Bin Meng,
  • Siqi Yang and
  • Endong Zu

29 April 2025

In recent years, domestic research on the ion substitution behavior and chromaticity of the mineral composition of “Ya’an Green” remains insufficient, while there is almost no relevant research on “Ya’an Green” abr...

  • Article
  • Open Access
14 Citations
4,985 Views
40 Pages

11 March 2023

The Yana–Kolyma metallogenic belt, NE Russia, is a world-class gold belt with resources numbering ~8300 tons of gold. The belt is localized in the central part of the Verkhoyansk–Kolyma orogen, formed by a collage of diverse terranes. The...