Results 91 to 100 of about 302,192 (337)

Monotonic and Logarithmically Convex Properties of a Function Involving Gamma Functions

Journal of Inequalities and Applications, 2009
Using the series-expansion of digamma functions and other techniques, some monotonicity and logarithmical concavity involving the ratio of gamma function are obtained, which is to give a partially affirmative answer to an open problem posed by B.-N.Guo ...
Tie-Hong Zhao, Yu-Ming Chu, Yue-Ping Jiang   +2 more
doaj   +2 more sources

Some properties of the k-Gamma function

Le Matematiche, 2013
We give completely monotonicity properties and inequalities for functions involving the Γ_k functions and their logarithmic derivatives ψ_k functions.
Chrysi G. Kokologiannaki, Valmir Krasniqi   +1 more
doaj  

Weibull-Fréchet distribution: A new lifetime distribution with application to gastric cancer data [PDF]

ITM Web of Conferences
Lifetime data is a type of data that consists of waiting time until an event occurs. Some of the events of lifetime data are deaths, occurrence of a disease, or failure of a machine. The distribution usually used for modeling lifetime data is the Weibull
Chindranata Marko, Nurrohmah Siti, Fithriani Ida   +2 more
doaj   +1 more source

Some completely monotonic functions involving the $q$-gamma function [PDF]

, 2010
We present some completely monotonic functions involving the $q$-gamma function that are inspired by their analogues involving the gamma function.Comment: 8 ...
Gao, Peng
core  

Compositing Effect Leads to Extraordinary Performance in GeSe‐Based Thermoelectrics

Advanced Functional Materials, EarlyView.
Rhombohedral GeSe is rationally designed with (GeSe)0.9(AgBiTe2)0.1‐1.5 mol.% SnSe, achieving a peak ZT of 1.31 at 623 K. Forming a composite with SnSe establishes interfaces with strong phonon scattering and weak electron scattering. Multiscale defects lead to an ultra‐low lattice thermal conductivity (0.26 W m−1 K−1), approaching the amorphous limit.
Min Zhang, Xiao‐Lei Shi, Siqi Liu, Raza Moshwan, Tianyi Cao, Wenyi Chen, Yongqi Chen, Meng Li, Chenyang Zhang, Nanhai Li, Boxuan Hu, Wanyu Lyu, Wei‐Di Liu, Guihua Tang, Zhi‐Gang Chen   +14 more
wiley   +1 more source

Obstruction enhances the diffusivity of self-propelled rod-like particles

, 2015
Diffusion of self-propelled particles in the presence of randomly distributed obstacles in three dimensions is studied using molecular dynamics simulations. It is found that depending on the magnitude of the propelling force and the particle aspect ratio,
Fazli, Hossein, Khalilian, Hamidreza
core   +1 more source

Integration of Perovskite/Low‐Dimensional Material Heterostructures for Optoelectronics and Artificial Visual Systems

Advanced Functional Materials, EarlyView.
Heterojunctions combining halide perovskites with low‐dimensional materials enhance optoelectronic devices by enabling precise charge control and improving efficiency, stability, and speed. These synergies advance flexible electronics, wearable sensors, and neuromorphic computing, mimicking biological vision for real‐time image analysis and intelligent
Yu‐Jin Du, Junjie Yang, Ziyu Lv, Yongbiao Zhai, Zezhuang Yi, Yuhui Xie, Ming‐Lin Zheng, Xiangyu Ma, Guodong Gong, Yan Wang, Ye Zhou, Su‐Ting Han   +11 more
wiley   +1 more source

Structural properties of limitwise monotonic reducibility of sequences of sets

Учёные записки Казанского университета: Серия Физико-математические науки, 2018
The paper is devoted to the study of limitwise monotonic sets, as well as to the investigation of the main structural properties of limitwise monotonic reducibility (lm-reducibility) between set and sequence of sets.
D.Kh. Zainetdinov
doaj  

Single Atom‐Particle Tandem Catalysis Enables Enhanced Desolvation Kinetics for Low‐Temperature Li‐S Batteries

Advanced Functional Materials, EarlyView.
In this work, the tandem catalyst consisted of single Fe atom and Fe3C nanoparticles on porous carbon sheet is initially proposed and developed to facilitate the dissociation of Li(solvent)x+ to release more isolated Li+ to participate in the subsequent polysulfide redox conversions by decreasing the related barriers, contributing to fast kinetics of ...
Yuhang Lin, Jian Wang, Xin Zhang, Xiaomin Cheng, Quan Zhuang, Jing Zhang, Qinghua Guan, Yanli Wang, Chunyin Shen, Hongzhen Lin, Liang Zhan, Licheng Ling, Yongzheng Zhang   +12 more
wiley   +1 more source

Logarithmically completely monotonic functions involving the Generalized Gamma Function

Le Matematiche, 2010
By a simple approach, two classes of functions involving generalization Euler's gamma function and originating from certain  problems of traffic flow are proved to be logarithmically  completely monotonic and a class of functions involving the psi ...
Faton Merovci, Valmir Krasniqi
doaj