Results 131 to 140 of about 306,832 (290)

Mechanical Behavior and Response Characteristics of Overlying Strata in Remining Longwall Top‐Coal Caving Working Face

open access: yesEnergy Science &Engineering, EarlyView.
ABSTRACT In the remining working face of thick coal seams, the instability of coal pillars near abandoned roadways can lead to advance fractures in the main roof, posing a significant threat to production safety. This study classifies roof collapse characteristics into four types and analyses the pillar instability mechanism using the Bieniawski ...
Defu Zhu   +3 more
wiley   +1 more source

Evolutionary Game Analysis of Joint Emission Reduction of Prefabricated Building Supply Chain Considering Government Rewards and Punishments

open access: yesEnergy Science &Engineering, EarlyView.
ABSTRACT Achieving carbon emission reduction of prefabricated building supply chain (PBSC) has become an effective means to achieve low‐carbon economic development in many countries. However, the current carbon emission reduction of PBSC lacks coordination among enterprises in the supply chain, making it difficult to realize the effects of the policy ...
Qianliang Yin   +3 more
wiley   +1 more source

Li16Sr6Ge6N, Li16Sr6Ge6.5 and related lithium alkaline‐earth metal tetrelides: Alternative filling of voids by nitride or tetrelide ions

open access: yesZeitschrift für anorganische und allgemeine Chemie, Volume 648, Issue 23, December 13, 2022., 2022
Abstract Large black single crystals with a metallic luster of Li16Sr6Ge6N and several other representatives of the series Li16Ae6Tt6N and Li16Ae6Tt6.5 (Ae=Ca, Sr; Tt=Si, Ge, Sn, Pb) were grown from mixtures of the respective elements with addition of binary alkaline‐earth metal nitrides or lithium nitride in the case of the nitrides. For the synthesis
Peter Höhn   +8 more
wiley   +1 more source

Convergence Analysis of Stochastic Saddle Point Mirror Descent Algorithm -- A Projected Dynamical View Point [PDF]

open access: yesarXiv
Saddle point problems, ubiquitous in optimization, extend beyond game theory to diverse domains like power networks and reinforcement learning. This paper presents novel approaches to tackle saddle point problem, with a focus on continuous-time contexts.
arxiv  

Generalized Iterative Methods for Solving Double Saddle Point Problem

open access: yesپژوهش‌های ریاضی, 2019
In this paper, we develop some stationary iterative schemes in block forms for solving double saddle point problem. To this end, we first generalize the Jacobi iterative method and study its convergence under certain condition.
Michele Benzi   +3 more
doaj  

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