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Multi-Level Parallel Netw.rk for Brain Tumor Segmentation

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Computer Modeling in Engineering & Sciences 2024年第4期139卷 741-757页

作者： Juhong Tie hui Peng School of Softw.re Engineering Chengdu University of Information TechnologyChengdu610225China

Accurate automatic segmentation of gliomas in various sub-regions,including peritumoral edema,necrotic core,and enhancing and non-enhancing tumor core from 3D multimodal MRI images,is challenging because of its highly heterogeneous appearance and *** convolution neural netw.rks(CNNs)have recently improved glioma segmentation ***,extensive dow.-sampling such as pooling or stridden convolution in CNNs significantly decreases the initial image resolution,resulting in the loss of accurate spatial and object parts information,especially information on the small sub-region tumors,affecting segmentation ***,this paper proposes a novel multi-level parallel netw.rk comprising three different level parallel subnetw.rks to fully use low.level,mid-level,and high-level information and improve the performance of brain tumor *** also introduce the Combo loss function to address input class imbalance and false positives and negatives imbalance in deep *** proposed method is trained and validated on the BraTS 2020 training and validation *** the validation dataset,ourmethod achieved a mean Dice score of 0.907,0.830,and 0.787 for the w.ole tumor,tumor core,and enhancing tumor core,*** w.th state-of-the-art methods,the multi-level parallel netw.rk has achieved competitive results on the validation dataset.

关键词： Convolution neural netw.rk brain tumor segmentation parallel netw.rk

Regulation of solvation structure and the cooperation environment of potassium bonds for w.der-temperature adaptive potassium storage

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Rare Metals 2024年第4期43卷 1610-1621页

作者： Bing-Bing Liu Yi-hui Liu You-Bin Zhang Zhen-Guo Qi Guo-hui Qin State Key Laboratory Base for Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao266042China Shandong Synergetic Innovation Center of Ecological and Chemical Engineering Qingdao266042China

Antimony selenide(Sb_(2)Se_(3))is one of the perspective candidates for potassium-ion batteries due to its advanced virtues stem including featured high capacity,fertile reserves and the relative narrow.band *** the unique advantages,it is still plagued by the unstable interface compatibility and poor w.der-temperature *** optimization of microstructure and the construction of inorganic-organic hybrids w.th a low.desolvation barrier and rapid kinetics behaviors are efficient to address these *** Sb_(2)Se_(3)nanorods enclosed by the S-doped carbon layer(SC),further crosslinked by the poly(N-isopropylacrylamide)(PM)film(PM@Sb_(2)Se_(3)@SC),w.re artificially fabricated,and it displays the enrichment ion aggregated model as w.ll as contacted ion pair state,the w.ll-tailored cooperation environment of potassium bonds,assuring a homogeneous potassium deposition and an excellent w.dertemperature *** complicated experimental studies and theoretical calculations authenticate the synergistic effects of geometric conformation and compositional design for the tremendously enhanced potassium ***,the full device over PM@Sb_(2)Se_(3)@SC anode and the potassium Prussian blue cathode manifests impressively durable cycling life and w.der-temperature adaptability,verifying the glorious contribution from the finely manipulation in solvation structure and potassium bonds to enhancing the potassium storage behaviors.

关键词： Anode Sb_(2)Se_(3) rods Interface compatibility Inorganic-organic electrode Potassium ion battery

Generic Existence of Infinitely Many Non-contractible Closed Geodesics on Compact Space Forms

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Acta Mathematica Sinica,English Series 2024年第7期40卷 1674-1684页

作者： hui Liu Yu Chen w.ng School of Mathematics and Statistics Wuhan UniversityWuhan430072P.R.China School of Mathematics Tianjin Normal UniversityTianjin300384P.R.China

Let M=S^(n)/Γand h be a nontrivial element of finite order p inπ_(1)(Μ),w.ere the integers n,p≥2,Γis a finite abelian group w.ich acts freely and isometrically on the n-sphere and therefore M is diffeomorphic to a compact space *** this paper,w. prove that there are infinitely many non-contractible closed geodesics of class[h]on the compact space form w.th C^(r)-generic Finsler metrics,w.ere 4≤r≤∞.The conclusion also holds for Cr-generic Riemannian metrics for 2≤r≤∞.The proof is based on the resonance identity of non-contractible closed geodesics on compact space forms.

关键词： Compact space forms non-contractible closed geodesics generic Finsler metrics resonance identity

Prescribed-time stabilization and inverse optimal control of stochastic high-order nonlinear systems

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Science China(Information Sciences) 2024年第2期67卷 144-156页

作者： Ran LIU hui w.NG w.quan LI School of Mathematics and Statistics Science Ludong University

This paper investigates the prescribed-time state-feedback stabilization and prescribed-time inverse optimality problems for stochastic high-order nonlinear systems. First, a time-varying controller is designed by developing scaled quartic Lyapunov functions, w.ich can guarantee that the system has a unique strong solution almost surely on the prescribed interval for any system initial conditions and that the states and the control converge to the origin in a mean-square form w.thin the prescribed time. Then, the controller is redesigned to address the problem of prescribed-time inverse optimal mean-square stabilization. Finally,a concrete example is provided to confirm the efficiency of the proposed design schemes.

关键词： stochastic high-order nonlinear systems prescribed-time stabilization the scaled design inverse optimality

From non-carbon host tow.rd carbon-free lithium-sulfur batteries

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Nano Research 2024年第3期17卷 1337-1365页

作者： Yanqi Feng hui Liu Qiongqiong Lu School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi’an 710021China Institute of Materials Henan Key Laboratory of Advanced Conductor MaterialsHenan Academy of SciencesZhengzhou 450046China Leibniz Institute for Solid State and Materials Research(IFw.Dresden e.V. Helmholtzstraβe 2001069 DresdenGermany School of Materials&Environment Engineering Chengdu Technological UniversityChengdu 611730China

Lithium-sulfur(Li-S)batteries w.th advantages of high energy densities(2600 w.·kg^(-1)/2800 w.·L^(-1))and sulfur abundance are regarded as promising candidates for next-generation high-energy ***,the conventional carbon host used in sulfur cathodes suffers from poor chemical adsorption tow.rds Li-polysulfides(LPS)in liquid electrolyte and sluggish redox kinetics,leading to low.capacity and rate ***,carbon host used in Li metal anode w.th the intrinsic property of poor lithiophilicity and high Li-nucleation barrier gives rise to uncontrollable dendrite grow.h and further battery ***,non-carbon hosts w.th chemical adsorption tow.rd LPS and catalytic activity for accelerating LPS redox conversion as w.ll as lithiophilic property for guiding uniform Li deposition are proposed and demonstrated a high efficiency in both sulfur cathodes and Li metal *** this review.the principle and challenges of Li-S batteries are first presented,then recent w.rk using non-carbon hosts in Li-S batteries is summarized comprehensively,and the mechanism of non-carbon host in improving sulfur utilization and stabilizing Li metal anode is discussed in ***,remaining challenges and outlook on the implementation of non-carbon host for practical carbon-free Li-S batteries are also provided.

关键词： sulfur cathode Li metal anode polysulfides adsorption catalytic effect Li dendrite carbon-free lithium-sulfur batteries

Local Discontinuous Galerkin Methods w.th Decoupled Implicit-Explicit Time Marching for the Grow.h-Mediated Autochemotactic Pattern Formation Model

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Advances in Applied Mathematics and Mechanics 2024年第1期16卷 208-236页

作者： hui w.ng hui Guo Jiansong Zhang Lulu Tian College of Science China University of PetroleumQingdaoShandong 266580China

In this paper,tw. fully-discrete local discontinuous Galerkin(LDG)methods are applied to the grow.h-mediated autochemotactic pattern formation model in self-propelling *** numerical methods are linear and decoupled,w.ich greatly improve the computational *** order to resolve the time level mismatch of the discretization process,a special time marching method w.th high-order accuracy is *** the condition of slight time step constraints,the optimal error estimates of this method are ***,the theoretical results are verified by numerical *** simulations show.the patterns of spots,rings,stripes as w.ll as inverted spots because of the interplay of chemotactic drift and grow.h rate of the cells.

关键词： Local discontinuous Galerkin methods implicit-explicit time-marching scheme error estimate grow.h-mediated autochemotactic pattern formation model

Energy-efficient buffer and service rate allocation in manufacturing systems using hybrid machine learning and evolutionary algorithms

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Advances in Manufacturing 2024年第2期12卷 227-251页

作者： Si-Xiao Gao hui Liu Jun Ota Key Laboratory of Traffic Safety on Track of Ministry of Education Institute of Artificial Intelligence and Robotics(IAIR)School of Traffic and Transportation EngineeringCentral South UniversityChangsha410075People’s Republic of China Research into Artifacts Center for Engineering School of EngineeringThe University of TokyoTokyoJapan

Currently,simultaneous buffer and service rate allocation is a topic of interest in the optimization of manufacturing *** allocation problems have been solved previously to satisfy economic requirements;how.ver,ow.ng to the progress of green manufacturing,energy conservation and environmental protection have become increasingly ***,an energy-efficient approach is developed to maximize the throughput and minimize the energy consumption of manufacturing systems,subject to the total buffer capacity,total service rate,and predefined energy *** energy-efficient approach integrates the simulated annealing-non-dominated sorting genetic algorithm-II w.th the honey badger algorithm-histogram-based gradient boosting regression *** former algorithm searches for Pareto-optimal solutions of sufficient *** latter algorithm builds prediction models to rapidly calculate the throughput,energy consumption,and energy *** examples show.that the proposed hybrid approach can achieve a better solution quality compared w.th previously reported ***,the prediction models can rapidly evaluate manufacturing systems w.th sufficient *** study benefits the multi-objective optimization of green manufacturing systems.

关键词： Energy-efficient allocation Multi-objective optimization Energy efficiency Energy consumption Machine learning

Fabrication of a 25.2 T NMR magnet for an extreme condition user facility in China

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National Science Review 2024年第7期11卷 62-64页

作者： hui Han Yun Shang MRI Research Institute Department of RadiologyWeill Medical College of Cornell University

An ultra-high field magnet（>20 T）is desirable for studying the characteristics of new.materials under extreme magnetic conditions [1]. Additionally,such field strength w.ll result in resonance frequencies close to or greater than 1 GHz w.en applied to the study of1H signals from biomolecules by nuclear magnetic resonance（NMR）,w.ich w.ll lead to a higher signal-to-noise ratio, better sensitivity and a higher spectral resolution due to increased chemical shift dispersion [2].

关键词： NMR double pancake high temperature superconducting magnet ultra-high field

Embracing the age of artificial intelligence:paradigm shifts,opportunities,and challenges in the treatment of acute graft-versus-host disease after allogeneic hematopoietic stem cell transplantation

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Science China(Life Sciences) 2024年第6期67卷 1302-1304页

作者： Zhuo-Yu An Xiao-hui Zhang Peking University People’s Hospital Peking University Institute of HematologyBeijing 100044China Collaborative Innovation Center of Hematology Peking UniversityBeijing 100044China Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation Beijing 100044China National Clinical Research Center for Hematologic Disease Beijing 100044China

Allogeneic hematopoietic stem cell transplantation(allo-HSCT)is an important medical development in treating hematological ***,the risk of acute graft-versus-host disease(a GVHD)severely limits its use.a GVHD is a sev... 详细信息

关键词： hematopoietic graft artificial