Results 161 to 170 of about 5,113,672 (306)

On the topological index of irregular surfaces

We study the topological index of some irregular surfaces that we call generalized Lagrangian. We show that under certain hypotheses on the base locus of the Lagrangian system the topological index is non-negative.
Naranjo, J. C., Pirola, Gian Pietro, Barja Yáñez, Miguel Ángel   +2 more
core  

Short and Length‐Independent Group Delay Supported by Topological Edge States in Finite‐Size Su–Schrieffer–Heeger Chains

Advanced Materials Technologies, EarlyView.
This study demonstrates short, length‐independent group delay supported by topological edge states in open Su–Schrieffer–Heeger networks. Strong boundary port coupling enables an order‐of‐magnitude latency reduction compared to bulk modes, alongside robust protection against bulk disorder.
Yu‐Han Chang, Nadia Daniela Rivera Torres, Santiago Figueroa Manrique, Raul A. Robles Robles, Vanna Chrismas Silalahi, Cen‐Shawn Wu, Gang Wang, Giulia Marcucci, Laura Pilozzi, Claudio Conti, Ray‐Kuang Lee, Watson Kuo   +11 more
wiley   +1 more source

Topological indices of cographs

, 2019
The Wiener index, the Harary index and edge-Wiener index are classic and well-known topological indices for the characterization of molecular graphs. Firstly, we give the formulae and algorithms for these topological indices of the complements of trees ...
Benediktovich, V.I., Lepin, V.V., Talmaciu, M.   +2 more
core  

Coherent Absorption Reveals Colors Hidden in a Grey Fabry–Pérot Cavity

Advanced Optical Materials, EarlyView.
A dielectric thin film shows colors depending on its thickness; this effect can be used to encode information normally accessible through single‐beam spectroscopy. We developed a method to conceal this kind of information, based on coating the dielectric with a matched conductor, that suppresses the color‐bearing thin‐film resonances.
Giuseppe E. Lio, Giulio Carotta, Lorenzo Lavista, Andrea Camposeo, Giacomo Venturi, Agnese Guernieri, Alessandro Pitanti, Simon A. R. Horsley, Giuseppe C. La Rocca, Alessandro Tredicucci, Simone Zanotto   +10 more
wiley   +1 more source

Spectral norm and energy of a digraph with respect to a VDB topological index. [PDF]

Heliyon
Espinal C, Monsalve J, Rada J.
europepmc   +1 more source

Information Transmission Strategies for Self‐Organized Robotic Aggregation

Advanced Robotics Research, EarlyView.
In this review, we discuss how information transmission influences the neighbor‐based self‐organized aggregation of swarm robots. We focus specifically on local interactions regarding information transfer and categorize previous studies based on the functions of the information exchanged.
Shu Leng, Zihan Li, Yifeng Shao, Jinhao Liu, Li Yu, Shuguang Li   +5 more
wiley   +1 more source

Enhancing topological index of calcium chloride network through feature selection methods exploration. [PDF]

Sci Rep
Javed S, Ahmad S, Sehar N, Khalid S, Siddiqui MK, Gegbe B.   +5 more
europepmc   +1 more source

Improving the Robustness of Visual Teach‐and‐Repeat Navigation Using Drift Error Correction and Event‐Based Vision for Low‐Light Environments

Advanced Robotics Research, EarlyView.
Visual teach‐and‐repeat (VTR) navigation allows robots to learn and follow routes without building a full metric map. We show that navigation accuracy for VTR can be improved by integrating a topological map with error‐drift correction based on stereo vision.
Fuhai Ling, Ze Huang, Tony J. Prescott
wiley   +1 more source

Extremal properties of connected 4-cyclic graphs of a topological index related to chemical graphs. [PDF]

Sci Prog
Rehman R, Tariq Rahim M, Muzaffar H, Hussain F.   +3 more
europepmc   +1 more source

A novel topological index for coding of alternant systems

, 2003
1295-1297Starting with the concept of T(A) graphs for alternant hydrocarbons, a novel topological index is defined. The index differentiates isomeric as well as isospectral molecules very well.
Turker, Lemi, Türker, Burhan Lemi
core