Results 251 to 260 of about 15,227,697 (301)

Strength-ductility synergy of Al0.1CoCrFeNi high-entropy alloys with gradient hierarchical structures

Scripta Materialia, 2019
A new strategy for strengthening Al0.1CoCrFeNi high-entropy alloys (HEAs) is introduced by architecting the gradient hierarchical structures (GHS). The GHS sheets show a dramatic enhancement in tensile yielding strength and acceptable tensile ductility ...
G. Chen, J. Qiao, Z. Jiao, D. Zhao, T. Zhang, Shufang Ma, Z. Wang   +6 more
semanticscholar   +1 more source

Bursty and hierarchical structure in streams

Proceedings of the eighth ACM SIGKDD international conference on Knowledge discovery and data mining, 2002
A fundamental problem in text data mining is to extract meaningful structure from document streams that arrive continuously over time. E-mail and news articles are two natural examples of such streams, each characterized by topics that appear, grow in intensity for a period of time, and then fade away.
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Porous organic polymers for drug delivery: hierarchical pore structures, variable morphologies, and biological properties.

Biomaterials Science, 2022
Porous organic polymers have received considerable attention in recent years because of their applicability as biomaterials. In particular, their hierarchical pore structures, variable morphologies, and tunable biological properties make them suitable as
Yunxin Tang, Anuraj Varyambath, Yuancheng Ding, Bailiang Chen, Xinyi Huang, Yu Zhang, Deng‐Guang Yu, Il-Joong Kim, Wenliang Song   +8 more
semanticscholar   +1 more source

Hierarchical structuring of superposed GSPNs

Proceedings of the Seventh International Workshop on Petri Nets and Performance Models, 1999
Superposed generalized stochastic Petri nets (SGSPNs) and stochastic automata networks (SANs) are formalisms to describe Markovian models as a collection of synchronously communicating components. Both formalisms allow a compact representation of the generator matrix of the Markov chain, which can be exploited for very space efficient analysis ...
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Impact of frying conditions on hierarchical structures and oil absorption of normal maize starch

, 2019
Knowledge about oil absorption during frying is crucial for the design and production of healthier reduced-fat food products. For this reason, we systematically investigated the structural changes and oil absorption of normal maize starch (NMS) during ...
Long Chen, Long Chen, Rongrong Ma, Zipei Zhang, D. Mcclements, Lizhong Qiu, Zhengyu Jin, Yaoqi Tian   +7 more
semanticscholar   +1 more source

Crashworthiness of bionic fractal hierarchical structures

Materials & Design (1980-2015), 2018
This paper presents a fractal hierarchical hexagon structure inspired by bionic structures, such as spider webs, as a novel lightweight energy absorber.
Yong Zhang, Jin Wang, Chunhui Wang, Yijia Zeng, Tengteng Chen   +4 more
semanticscholar   +1 more source

Controllable synthesis of CuS hollow microflowers hierarchical structures for asymmetric supercapacitors

Applications of Surface Science, 2018
One of the major challenges of high-performance asymmetric supercapacitors is engineering electrode materials with high capacitance and good cycling stability.
Yanxia Liu, Zhaoxi Zhou, Shengping Zhang, Wenhao Luo, Guofeng Zhang   +4 more
semanticscholar   +1 more source

Synthesis and gas sensing properties of NiO/SnO2 hierarchical structures toward ppb-level acetone detection

Materials research bulletin, 2018
We have synthesized pristine SnO 2 and NiO/SnO 2 hierarchical structures by a facile hydrothermal method. Structural and morphological characterizations of the obtained NiO/SnO 2 samples were systematically studied using XRD, SEM, TEM and XPS. Meanwhile,
Jie Hu, Jie Yang, Wenda Wang, Yan Xue, Yongjiao Sun, Pengwei Li, K. Lian, Wendong Zhang, Lin Chen, Jian Shi, Yong Chen   +10 more
semanticscholar   +1 more source

Detecting hierarchical structure in networks

2012 3rd International Workshop on Cognitive Information Processing (CIP), 2012
Many real-world networks exhibit hierarchical organization. Previous models of hierarchies within relational data has focused on binary trees; however, for many networks it is unknown whether there is hierarchical structure, and if there is, a binary tree might not account well for it.
Tue Herlau, Morten Mørup, Mikkel N. Schmidt, Lars Kai Hansen   +3 more
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On Designing a Reliable Hierarchical Structure

SIAM Journal on Applied Mathematics, 1977
This paper considers the design and analysis of a class of managerial structures which are perhaps best illustrated by a spy network. The problem is formulated as a reliability problem on organizational trees, and two probabilistic performance measures are studied.
Goodman, S., Shier, D.
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