Results 111 to 120 of about 333,530 (288)

Nondestructive Testing of Welded Composite Metal Foams

open access: yesAdvanced Engineering Materials, EarlyView.
X‐ray computed tomography (CT) is used to evaluate welded steel–steel composite metal foam (CMF) joints of two density classes. It reports variation in postweld spatial void distribution and correlates it to weld‐induced changes, mechanical performance, and failure within welded CMF panels.
Chinmaya Prerana Inguva   +2 more
wiley   +1 more source

基于杆长约束的变拓扑机构奇异性分析方法

open access: yesJixie chuandong, 2008
The classification about singularity of closed-chain variable topology mechanism is proposed and the technique for analysis of speed matrix of variable topology mechanism based on the length constraints is presented.
郭兴辉, 秦伟, 侯少毅
doaj  

A proof of Atiyah's conjecture on configurations, of four points in Euclidean three-space

open access: yes, 2001
From any configuration of finitely many points in Euclidean three-space, Atiyah constructed a determinant and conjectured that it was always non-zero. Atiyah and Sutcliffe (hep-th/0105179) amass a great deal of evidence it its favour.
Atiyah, Michael Eastwood, Paul Norbury
core   +1 more source

Exploring Dipolar Dynamics and Ionic Transport in Metal‐Organic Frameworks: Experimental and Theoretical Insights

open access: yesAdvanced Functional Materials, EarlyView.
In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund   +6 more
wiley   +1 more source

Enhancing Optoelectronic Properties in Phthalocyanine‐Based SURMOFs: Synthesis of ABAB Linkers by Avoiding Statistical Condensation with Tailored Building Blocks

open access: yesAdvanced Functional Materials, EarlyView.
A novel phthalocyanine (PC)‐based metal–organic framework (MOFs) is synthesized using ditopic PC linkers obtained through regioselective statistical condensation. The resulting MOF exhibits significant improvements in electronic absorption, thereby enhancing the material's performance in light harvesting and energy conversion.
Lukas S. Langer   +12 more
wiley   +1 more source

A Novel 24-Pulse Rectification System

open access: yesIEEE Access, 2018
A novel autotransformer configuration for 24-pulse rectification is proposed that not only maintains the desired power quality but also enables a reduction in autotransformer equivalent power capacity, therefore lowering cost, volume, and weight of the ...
Shahbaz Khan   +6 more
doaj   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

open access: yesAdvanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger   +11 more
wiley   +1 more source

Dynamic Analysis of Metamorphic Mechanisms with Impact Effects During Configuration Transformation

open access: yesChinese Journal of Mechanical Engineering
Metamorphic mechanisms have attracted considerable attention owing to their capability to switch their topology to adapt to different operational tasks.
Yang Zhou   +3 more
doaj   +1 more source

Topology of two-connected graphs and homology of spaces of knots

open access: yes, 1997
We propose a new method of computing cohomology groups of spaces of knots in $\R^n$, $n \ge 3$, based on the topology of configuration spaces and two-connected graphs, and calculate all such classes of order $\le 3.$ As a byproduct we define the higher ...
Vassiliev, Victor A.
core   +1 more source

Topology Configuration in Hybrid EPS/OCS Interconnects [PDF]

open access: yes, 2012
We consider a hybrid Electronic Packet Switched (EPS) and Optical Circuit Switched (OCS) interconnection network (IN) for future HPC and DC systems. Given the point-to-point communication graph of an application, we present a heuristic algorithm that partitions logical parallel tasks to compute resources and configures the (re-configurable) optical ...
Konstantinos Christodoulopoulos   +3 more
openaire   +1 more source

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