Results 31 to 40 of about 175,962 (155)
The extremal spectral radii of $k$-uniform supertrees
, 2014 In this paper, we study some extremal problems of three kinds of spectral radii of $k$-uniform hypergraphs (the adjacency spectral radius, the signless Laplacian spectral radius and the incidence $Q$-spectral radius). We call a connected and acyclic $k$
Li, Honghai, Qi, Liqun, Shao, Jiayu
core +1 more source
On Maximum Signless Laplacian Estrada Indices of Graphs with Given Parameters [PDF]
, 2014 Signless Laplacian Estrada index of a graph $G$, defined as $SLEE(G)=\sum^{n}_{i=1}e^{q_i}$, where $q_1, q_2, \cdots, q_n$ are the eigenvalues of the matrix $\mathbf{Q}(G)=\mathbf{D}(G)+\mathbf{A}(G)$. We determine the unique graphs with maximum signless
Ellahi, H. R. +3 more
core
Generalizations of Wiener polarity index and terminal Wiener index
, 2012 In theoretical chemistry, distance-based molecular structure descriptors are used for modeling physical, pharmacologic, biological and other properties of chemical compounds.
Ilic, Aleksandar, Ilic, Milovan
core +1 more source
The Maximum Packing and Minimum Covering Designs for the Join Graph of K1 and C4 with a Pendent Edge
DEStech Transactions on Engineering and Technology Research, 2018 A G-design of λKv is a pair(X, B), where X is the vertex set Kv and B is a collection of subgraphs of Kv, such that each block is isomorphic to G and any two distinct vertices in K are joined in exact (at most, at least) λ blocks of B . In this paper, we
Qi Wang, Xiaoshan Liu
semanticscholar +1 more source
Advanced Healthcare Materials, EarlyView.Norbornene‐functionalized alginate is crosslinked with a di‐thiolated peptide sequence cleavable by cell‐secreted matrix metalloproteinases and decorated with cell‐adhesion peptides upon exposure to UV. Thyroid follicles, endometrial and intestinal organoids are encapsulated in a gentle manner with high cell viability and correct phenotype ...
Julia Fernández‐Pérez +8 more
wiley +1 more source
Vat Photopolymerized HEMA/HEA Hydrogels for Solvent‐Responsive Transparency and Optical Encryption
Advanced Optical Materials, EarlyView.Vat‐photopolymerized HEMA/HEA hydrogels exhibit reversible transparency‐opacity switching via hydration‐induced microphase separation and solvent exchange. The printed materials enable hydration sensing, optical encryption, and information storage, while maintaining high ductility and reversible rheology.
Murad Ali +4 more
wiley +1 more source
Eccentric connectivity index [PDF]
, 2010 The eccentric connectivity index $\xi^c$ is a novel distance--based molecular structure descriptor that was recently used for mathematical modeling of biological activities of diverse nature. It is defined as $\xi^c (G) = \sum_{v \in V (G)} deg (v) \cdot
Ilić, Aleksandar
core
American Journal of Botany, EarlyView.Abstract Premise Flowers that present their anthers and stigma in close proximity can achieve precise animal‐mediated pollen transfer, but risk self‐pollination. One evolutionary solution is reciprocal herkogamy. Reciprocity of anther and style positions among different plants (i.e., a genetic dimorphism) is common in distylous plants, but very rare in
Steven D. Johnson +5 more
wiley +1 more source
Potential eventual positivity of sign patterns with the underlying broom graph
Arab Journal of Mathematical Sciences, 2017 A sign pattern is a matrix whose entries belong to the set {+,−,0}. An n-by-nsign pattern A is said to allow an eventually positive matrix or be potentially eventually positive if there exist at least one real matrix A with the same sign pattern as A and
Ber-Lin Yu +3 more
doaj +1 more source
American Journal of Botany, EarlyView.Abstract Premise High‐latitude plants initiate flower primordia at least 1 year before flowering. While impacts of rising temperatures on phenology in the flowering year are well studied, the effects of warmer temperatures in the initiation year (IY; the year before flowering) are virtually unknown.
Christa P. H. Mulder +2 more
wiley +1 more source