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DiriNet:An Estimation Network for Spectral Response Function and Point Spread Function

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Journal of Beijing Institute of Technology 2024年第4期33卷 287-297页

作者： Ting Hu Siyuan Cheng chang Liu Beijing Key Laboratory of Computa-tional Intelligence and Intelligent System Faculty of Infor-mation TechnologyBeijing University of TechnologyBei-jing 100124China Space Star Technology Co. LtdBeijing 100086China Research Institute of Intelligent Wire-less Communication Network Technology Faculty of Infor-mation TechnologyBeijing University of TechnologyBei-jing 100124China.

Hyper-and multi-spectral image fusion is an important technology to produce hyper-spectral and hyper-resolution images,which always depends on the spectral response function andthe point spread ***,few works have been payed on the estimation of the two degra-dation *** learn the two functions from image pairs to be fused,we propose a Dirichletnetwork,where both functions are properly ***,the spatial response function isconstrained with positivity,while the Dirichlet distribution along with a total variation is imposedon the point spread *** the best of our knowledge,the neural network and the Dirichlet regularization are exclusively investigated,for the first time,to estimate the degradation *** image degradation and fusion experiments demonstrate the effectiveness and superiority of theproposed Dirichlet network.

关键词： Dirichlet network point spread function spectral response function hyper-spectralimage multi-spectral image

Nonlinear Registration of Brain Magnetic Resonance Images with Cross Constraints of Intensity and Structure

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Computers, Materials & Continua 2024年第5期79卷 2295-2313页

作者： Han Zhou HongtaoXu Xinyue chang Wei Zhang Heng Dong Digital Fujian Research Institute of Big Data forAgriculture and Forestry Fujian Agriculture and Forestry UniversityFuzhou350002China College of Computer and Information Science Fujian Agriculture and Forestry UniversityFuzhou350002China

Many deep learning-based registration methods rely on a single-stream encoder-decoder network for computing deformation fields between 3D ***,these methods often lack constraint information and overlook semantic consistency,limiting their *** address these issues,we present a novel approach for medical image registration called theDual-VoxelMorph,featuring a dual-channel cross-constraint *** innovative network utilizes both intensity and segmentation images,which share identical semantic information and feature *** encoder-decoder structures calculate deformation fields for intensity and segmentation images,as generated by the dual-channel cross-constraint *** design facilitates bidirectional communication between grayscale and segmentation information,enabling the model to better learn the corresponding grayscale and segmentation details of the same anatomical *** ensure semantic and directional consistency,we introduce constraints and apply the cosine similarity function to enhance semantic *** on four public datasets demonstrates superior performance compared to the baselinemethod,achieving Dice scores of 79.9%,64.5%,69.9%,and 63.5%for OASIS-1,OASIS-3,LPBA40,and ADNI,respectively.

关键词： Medical image registration cross constraint semantic consistency directional consistency dual-channel

鹰嘴豆源性鹰嘴豆芽素A对运动性疲劳大鼠的能量代谢调控作用

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分子植物育种 2024年第5期22卷 1625-1635页

作者：李明常永丽长治学院长治046011 长治医学院长治046000

本研究探讨了鹰嘴豆芽素A(Biochanin A,Bio-A)的抗运动性疲劳(EIF)作用和能量代谢调控作用。本研究通过负重力竭游泳运动诱导了EIF大鼠模型。运动过程中对大鼠灌胃3个剂量(10,20和40 mg·kg^(-1)·d^(-1))的鹰嘴豆芽素A,同时腹腔注射0.5... 详细信息

本研究探讨了鹰嘴豆芽素A(Biochanin A,Bio-A)的抗运动性疲劳(EIF)作用和能量代谢调控作用。本研究通过负重力竭游泳运动诱导了EIF大鼠模型。运动过程中对大鼠灌胃3个剂量(10,20和40 mg·kg^(-1)·d^(-1))的鹰嘴豆芽素A,同时腹腔注射0.5 mg·kg^(-1)·d^(-1)Compound C(AMPK抑制剂)。共运动或给药4周。分别检测大鼠的力竭时间、血清有害代谢物指标、能量代谢指标和骨骼肌氧化应激指标水平。通过RT-qPCR检测骨骼肌能量代谢基因转录水平。通过Western blot检测骨骼肌AMPKα的磷酸化水平。结果显示,鹰嘴豆芽素A剂量依赖性地升高了EIF大鼠的力竭时间,降低了LDH、CK和cTnI水平,升高了肝糖原、肌糖原和Glu水平,降低了LA和BUN水平,升高了SOD和CAT水平,降低了MDA水平,升高了PGC-1α、HK2、GLUT-4、CS的mRNA相对表达量,降低了PDK4的m RNA相对表达量,升高了AMPKα的相对磷酸化水平(P<0.05)。Compound C减弱了鹰嘴豆芽素A的抗疲劳作用(P<0.05)。总之,鹰嘴豆芽素A通过激活AMPK通路改善运动性疲劳大鼠的能量代谢,发挥抗疲劳作用,这一发现可能有助于进一步研究鹰嘴豆芽素A作为一种潜在的天然药物来预防和减轻运动性疲劳。

关键词：鹰嘴豆芽素A 运动性疲劳能量代谢 AMP活化蛋白激酶抗氧化

Spatial and temporal variation of water clarity in typical reservoirs in the Beijing-Tianjin-Hebei region observed by GF 1-WFV satellite data

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Journal of Oceanology and Limnology 2024年第4期42卷 1048-1060页

作者： chang CAO Junsheng LI Xiaodong JIA Shenglei WANG Bo WAN Liaoning Earthquake Agency Shenyang 11000China Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100094China International Research Center of Big Data for Sustainable Development Goals Beijing 100094China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

Rapidly monitoring regional water quality and the changing trend is of great practical and scientific significance,especially for the Beijing-Tianjin-Hebei(BTH)region of China where water resources are relatively scarce and inland water bodies are generally *** remote sensing data of the GF 1 satellite launched in 2013 have characteristics of high spatial and temporal resolution,which can be used for the dynamic monitoring of the water environment in small lakes and ***,the water quality remote sensing monitoring model based on the GF 1 satellite data for lakes and reservoirs in BTH is still lacking because of the considerable differences in the optical characteristics of the lakes and *** this paper,the typical reservoirs in BTH-Guanting Reservoir,Yuqiao Reservoir,Panjiakou Reservoir,and Daheiting Reservoir are taken as the study *** the atmospheric correction of GF 1-WFV,the relative radiation normalized atmospheric correction was adopted after comparing it with other methods,such as 6 S and *** the water clarity retrieval,a water color hue angle based model was proposed and outperformed other available published models,with the R 2 of 0.74 and MRE of 31.7%.The clarity products of the four typical reservoirs in the BTH region in 2013-2019 were produced using the GF 1-WFV *** on the products,temporal and spatial changes in clarity were analyzed,and the main influencing factors for each water body were *** was found that the clarity of Guanting,Daheiting,and Panjiakou reservoirs showed an upward trend during this period,while that of Yuqiao Reservoir showed a downward *** the influencing factors,the water level of the water bodies can be an important factor related to the water clarity changes in this region.

关键词： GF 1 satellite atmospheric correction clarity Beijing-Tianjin-Hebei spatial and temporal change analysis

A triboelectric nanogenerator based on a spiral rotating shaft for efficient marine energy harvesting of the hydrostatic pressure differential

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Materials Reports(Energy) 2024年第3期4卷 69-76页

作者： Xuemei Song Yuan Chao Pan chang Bao Han chang Xin Liu Yaxiaer Yalikun Hui Yan Yang Yang Key Laboratory of Advanced Functional Materials(Beijing University of Technology) Ministry of EducationBeijing Key Lab of Microstructure and Property of Advanced MaterialsBeijing University of TechnologyBeijing100124PR China Institute of Deep-Sea Science and Engineering Chinese Academy of SciencesSanya572000PR China Division of Materials Science Nara Institute of Science and Technology8916-5 Takayama-choIkomaNara630-0192Japan

Equipment used in underwater sensing and exploration typically relies on cables or batteries for energy supply,resulting in a limited and inconvenient energy supply and marine environmental pollution that hinder the sustainable development of distributed ocean sensing ***,we design a deep-sea differential-pressure triboelectric nanogenerator(DP-TENG)based on a spiral shaft drive using modified polymer materials to harness the hydrostatic pressure gradient energy at varying ocean depths to power underwater *** spiral shaft structure converts a single compression into multiple rotations of the TENG rotor,achieving efficient conversion of differential pressure *** multi-pair electrode design enables the DP-TENG to generate a peak current of 61.7μA,the instantaneous current density can reach 0.69μA cm^(-2),and the output performance can be improved by optimizing the spiral angle of the *** DP-TENG can charge a 33μF capacitor to 17.5 V within five working *** can also power a digital calculator and light up 116 commercial power light-emitting diodes,demonstrating excellent output *** its simple structure,low production cost,and small form factor,the DP-TENG can be seamlessly integrated with underwater *** results hold broad prospects for underwater blue energy harvesting and are expected to contribute to the development of self-powered equipment toward emerging“smart ocean”and blue economy applications.

关键词： Triboelectric nanogenerators Blue energy Energy harvesting Differential pressure energy Self-power sensor

A modular approach to efficient thermally activated delayed fluorescence from metal-perturbed intraligand charge-transfer excited state of Au(I) complexes

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Science China Chemistry 2024年

作者： Jian-Gong Yang Xingyu Feng Guohua Xie Nengquan Li Jiayu Li Xiu-Fang Song ming-De Li Jingling Zhang Xiaoyong chang Kai Li Shenzhen Key Laboratory of New Information Display and Storage Materials Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and Engineering Shenzhen University Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing Department of Chemistry and Chemical EngineeringWuhan Textile University The Institute of Flexible Electronics (Future Technologies) Xiamen University Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Department of ChemistryShantou University Department of Chemistry Southern University of Science and Technology

The efficient harvesting of triplet excitons is crucial to the realization of high-performance organic light-emitting diodes（OLEDs）.Herein,we show that coordination of donor-acceptor （D-A） type molecules to a metal atom in a monodentate fashion can lead to thermally activated delayed fluorescence （TADF） emissions with wide color tunability only through varying the noncoordinating acceptor moiety.A panel of TADF gold（I） complexes with emission maxima (λmax) of 545–645 nm from metal perturbed intraligand charge-transfer （MPICT） excited states have been *** effects of heavy atom-induced spin-orbit coupling （SOC）,steric-induced donor-acceptor twisting and suppressed intramolecular motions lead to high emission efficiencies of 65%?85% in doped films with delayed fluorescence lifetime of as short as 2.0μ*** absorption spectroscopic studies on selected complexes determined the kISCto be 6.5×10～*** calculations confirmed the participation of minor d orbital into the lowest excited state,which led to an SOC value of 5.19 cm-1between the lowest-lying singlet and triplet excited *** yellow to deep red solution-processed OLEDs based on the new gold（I） complexes incorporated with various D-A ligands demonstrated promising *** study validates a modular design for TADF metal complexes,which will broaden the choices of metal centers and allow for facile color tuning via simple ligand synthesis.

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Fucoxanthin promotes the chain lengthening reaction of polyunsaturated fatty acids in vivo by enhancing FADS2 enzyme activity

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Food Science and Human Wellness 2024年

作者： Xiao-Yue Li Tian-Xin Yang Ying-Cai Zhao Cheng-Cheng Wang chang-Hu Xue Teruyoshi Yanagita Yu-ming Wang Tian-Tian Zhang SKL of Marine Food Processing & Safety Control College of Food Science and Engineering Ocean University of China Laboratory of Nutrition Biochemistry Department of Applied Biochemistry and Food Science Saga University

Alpha-linolenic acid (ALA) is capable of synthesizing EPA and DHA in vivo， but the conversion rate is hard to meet the body's need for rapid DHA supplementation. Studies have shown that fucoxanthin can increase DHA content in the liver of mice， but the mechanism is not clear. Moreover， the effect of fucoxanthin and its metabolite fucoxanthinol on the chain lengthening reaction of n-6 polyunsaturated fatty acids (PUFAs) is little studied. In this study， the effects of fucoxanthin and fucoxanthinol on the chain elongation of n-3 and n-6 series PUFAs were investigated in mice. Results showed that fucoxanthin and fucoxanthinol significantly increased the conversion of n-3 series ALA to DHA and n-6 series LA to AA in the serum， liver， small intestine， and heart of mice. In addition， fucoxanthin accelerated the rate of DHA supplementation by ALA in the brain. Further mechanistic studies revealed that the role of fucoxanthin in promoting PUFAs conversion was not regulated at transcriptional level， but by increasing the activity of fatty acid desaturase 2 (FADS2)， a key enzyme of chain elongation reaction of n-3 and n-6 PUFAs. This study fundamentally provided theoretical bases for a new strategy of dietary supplementation of n-3 and n-6 PUFAs.

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Advances in depressants for flotation separation of Cu–Fe sulfide minerals at low alkalinity:A critical review

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 1-17页

作者： Qicheng Feng Wenhang Yang Maohan chang Shuming Wen Dianwen Liu Guang Han State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Land Resource EngineeringKunming University of Science and TechnologyKunming 650093China Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Mineral Resources Kunming University of Science and TechnologyKunming 650093China

The flotation separation of Cu–Fe sulfide minerals at low alkalinity can be achieved using selective *** the flotation system of Cu–Fe sulfide minerals,depressants usually preferentially interact with the pyrite surface to render the mineral surface hydrophilic and hinder the adsorption of the *** review summarizes the advances in depressants for the flotation separation of Cu–Fe sulfide minerals at low *** advances include use of inorganic depressants (oxidants and sulfur–oxygen compounds),natural polysaccharides (starch,dextrin,konjac glucomannan,and galactomannan),modified polymers (carboxymethyl cellulose,polyacrylamide,lignosulfonate,and tricarboxylate sodium starch),organic acids (polyglutamic acid,sodium humate,tannic acid,pyrogallic acid,salicylic acid,and lactic acid),sodium dimethyl dithiocarbamate,and *** potential application of specific inorganic and organic depressants in the flotation separation of Cu–Fe sulfide minerals at low alkalinity is *** advances in the use of organic depressants with respect to the flotation separation of Cu–Fe sulfide minerals are comprehensively ***,the depression performances and mechanisms of different types of organic depressants on mineral surfaces are ***,several perspectives on depressants vis-à-vis flotation separation of Cu–Fe sulfide minerals at low alkalinity are proposed.

关键词： Cu–Fe sulfide minerals flotation separation selective depressants depression mechanism

Unraveling the complex roles of macrophages in obese adipose tissue:an overview

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Frontiers of Medicine 2024年第2期18卷 205-236页

作者： chang Peng Jun Chen Rui Wu Haowen Jiang Jia Li Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou310000China State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai201203China University of Chinese Academy of Sciences Beijing100049China Department of Prosthodontics Shanghai Engineering Research Center of Advanced Dental Technology and MaterialsShanghai Key Laboratory of Stomatology&Shanghai Research Institute of StomatologyNational Clinical Research Center for Oral DiseasesShanghai Ninth People’s HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghai200011China

Macrophages,a heterogeneous population of innate immune cells,exhibit remarkable plasticity and play pivotal roles in coordinating immune responses and maintaining tissue homeostasis within the context of metabolic *** activation of inflammatory macrophages in obese adipose tissue leads to detrimental effects,inducing insulin resistance through increased inflammation,impaired thermogenesis,and adipose tissue ***,adipose tissue macrophages also play a beneficial role in maintaining adipose tissue homeostasis by regulating angiogenesis,facilitating the clearance of dead adipocytes,and promoting mitochondrial *** the heterogeneity of macrophages in obese adipose tissue is crucial for unraveling the pathogenesis of obesity and holds significant potential for targeted therapeutic ***,the dual effects and some potential regulatory mechanisms of macrophages in adipose tissue have been elucidated using single-cell *** this review,we present a comprehensive overview of the intricate activation mechanisms and diverse functions of macrophages in adipose tissue during obesity,as well as explore the potential of drug delivery systems targeting macrophages,aiming to enhance the understanding of current regulatory mechanisms that may be potentially targeted for treating obesity or metabolic diseases.

关键词： obesity inflammation adipose tissue macrophages adipose tissue homeostasis