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Improved Double Deep Q Network-Based Task Scheduling Algorithm in Edge Computing for Makespan Optimization

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Tsinghua Science and Technology 2024年第3期29卷 806-817页

作者： Lei Zeng qi liu Shigen Shen Xiaodong liu School of Computer Science Nanjing University of Information Science and TechnologyNanjing 210044China School of Software Nanjing University of Information Science and TechnologyNanjing 210044China School of Information Engineering Huzhou UniversityHuzhou 313000China School of Computing Edinburgh Napier UniversityEdinburghEH105DTUK

Edge computing nodes undertake an increasing number of tasks with the rise of business ***,how to efficiently allocate large-scale and dynamic workloads to edge computing resources has become a critical *** study proposes an edge task scheduling approach based on an improved Double Deep Q Network(DQN),which is adopted to separate the calculations of target Q values and the selection of the action in two networks.A new reward function is designed,and a control unit is added to the experience replay unit of the *** management of experience data are also modified to fully utilize its value and improve learning *** learning agents usually learn from an ignorant state,which is *** such,this study proposes a novel particle swarm optimization algorithm with an improved fitness function,which can generate optimal solutions for task *** optimized solutions are provided for the agent to pre-train network parameters to obtain a better cognition *** proposed algorithm is compared with six other methods in simulation *** show that the proposed algorithm outperforms other benchmark methods regarding makespan.

关键词： edge computing task scheduling reinforcement learning makespan Double Deep Q Network(DQN)

Two sandwich-type uranyl-containing polytungstates catalyze aerobic synthesis of benzimidazoles

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Rare Metals 2024年第3期43卷 1316-1322页

作者： Yu-feng liu qi-Long Hu Xue-Jiao Chen Ke Li Pei Luo Guo-Ping Yang School of Chemistry and Material Science Jiangxi Province Key Laboratory of Synthetic ChemistryJiangxi Key Laboratory for Mass Spectrometry and InstrumentationEast China University of TechnologyNanchang330013China School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen518055China

Diversified synthetic strategies are extremely important for the structural diversity of uranium-containing polyoxometalates(U-POMs)and their functional ***,two sandwich-type U-POMs were reported,which are Na_(5.6)K_(6.4)[(UO_(2))(H_(2)O)(TeW_(9)O_(33))]_(2)·21H_(2)O(UTeW_(9))and Na_(8.9)K_(2.7)H_(1.19)[K_(0.79)(UO_(2))_(2.21)(PW_(9)O_(34))_(2)]·12H_(2)O(UPW_9)using in-situ strategy and lacunary precursor strategy,***_9 shows a typical Keggin-typeopen or half-sandwich configuration.

关键词： configuration expansion sandwich

Enantioselective Synthesis of Benzimidazole Atropisomers Featuring a N-N Axis

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Chinese Journal of Chemistry 2024年第7期42卷 711-718页

作者： Fang-Bei Ge qi-Kun Yin Chuan-Jun Lu Xuan Xuan Jia feng Ren-Rong liu College of Chemistry and Chemical Engineering Qingdao UniversityQingdaoShandong 266071China School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug EvaluationMinistry of EducationYantai UniversityYantaiShandong 264005China

Atroposelective synthesis of N-N atropisomers is an emerging area but remains underexplored;in particular,the synthesis of N-N benzimidazole atropisomers is still ***,the first enantioselective synthesis of N-N benzimidazole atropisomers via the palladium-catalyzed de novo construction of benzimidazole skeleton is *** readily available palladium catalyst and biphosphine ligand,a broad range of nonbiaryl benzimidazole and indole-benzimidazole atropisomers were conveniently ac-cessed in high yields and with excellent ***,these N-N benzimidazole atropisomers showed great anti-tumor activity and selectivity to breast cancer MCF-7 *** simple catalytic system,broad substrate scope,high enantioselectivi-ty,and good bioactivity make this approach highly attractive.

关键词： Asymmetric synthesis Atropisomerism Palladium Benzimidazole Antitumor

经皮冠状动脉腔内冲击波球囊导管成形术在血管内超声指导下对左主干重度钙化治疗的有效性和安全性分析

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中国介入心脏病学杂志 2024年第7期32卷 383-389页

作者：刘丰齐鲍骏李拜红陈翀昊高长征过云峰顾鑫顾建斌王晓彦江南大学附属医院心内科江苏无锡214000 惠山区第二人民医院心内科江苏无锡214000

目的探讨经皮冠状动脉腔内冲击波球囊导管成形术或称血管内碎石术(IVL)在血管内超声(IVUS)指导下治疗左主干(LM)重度钙化病变的有效性和安全性。方法纳入2022年10月至2024年4月期间江南大学附属医院收治的26例LM(口部、体部、分叉)重度... 详细信息

目的探讨经皮冠状动脉腔内冲击波球囊导管成形术或称血管内碎石术(IVL)在血管内超声(IVUS)指导下治疗左主干(LM)重度钙化病变的有效性和安全性。方法纳入2022年10月至2024年4月期间江南大学附属医院收治的26例LM(口部、体部、分叉)重度钙化患者,年龄72.0(61.8,75.4)岁。在IVUS指导下应用IVL对钙化病变进行预处理,再行经皮冠状动脉介入治疗(PCI)置入支架/药物球囊。所有患者均在应用IVL前后、PCI术后使用IVUS进行评估,并比较治疗前后IVUS腔内相关数据[斑块负荷(PB)、最小管腔面积(MLA)、最小管腔直径(MLD)]以及钙化断裂数、最小支架面积(MSA)、支架膨胀系数(EXP)等。结果26例患者(2例开口病变、7例体部病变、17例主干末端分叉病变)中稳定型心绞痛(SAP)7例,不稳定型心绞痛(UA)10例,急性ST段抬高型心肌梗死(STEMI)4例和非ST段抬高型心肌梗死(NSTEMI)5例。钙化最严重部位处PB在IVL后减小[79.50(76.00,83.75)%比80.00(76.00,83.75)%,P=0.001],MLA在IVL后增大[3.39(3.14,3.68)mm2比3.38(3.14,3.67)mm2,P=0.039],MLD在IVL后增大[3.21(3.07,3.30)mm比3.20(3.07,3.30)mm,P=0.024],100%有钙化环断裂(2例1个,9例2个,15例≥3个),100%成功置入支架/药物球囊,EXP高达(89.15±4.42)%,MSA 7.20(6.46,7.45)mm2。术后随访3个月均无心绞痛、复发性心肌梗死和死亡等不良事件发生。结论LM重度钙化病变经IVUS评估经IVL预处理后成功完成PCI术,IVL可作为LM重度钙化治疗的选择。

关键词：血管内碎石术左主干冠状动脉钙化血管内超声

Cosmological Constraints on Neutrino Masses in Light of JWST Red and Massive Candidate Galaxies

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Research in Astronomy and Astrophysics 2024年第4期24卷 7-12页

作者： Jian-qi liu Zhi-qi Huang Yan Su School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China CSST Science Center for the Guangdong-Hong Kong-Macao Greater Bay Area Zhuhai 519082China

The overabundance of the red and massive candidate galaxies observed by the James Webb Space Telescope(JWST)implies efficient structure formation or large star formation efficiency at high redshift z~*** the scenario of a low or moderate star formation efficiency,because massive neutrinos tend to suppress the growth of structure of the universe,the JWST observation tightens the upper bound of the neutrino *** A cold dark matter cosmology and a star formation efficiency∈[0.05,0.3](flat prior),we perform joint analyses of Planck+JWST and Planck+BAO+JWST,and obtain improved constraints∑m_(ν)<0.196 eV and ∑m_(ν)+<0.111 eV at 95% confidence level,*** on the above assumptions,the inverted mass ordering,which implies ∑m_(ν)≥0.1 eV,is excluded by Planck+BAO+JWST at 92.7% confidence level.

关键词： (cosmology:)cosmological parameters galaxies:abundances galaxies:formation neutrinos

Unraveling the modulation essence of p bands in Co-based oxide stability on acidic oxygen evolution reaction

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Nano Research 2024年第7期17卷 5922-5929页

作者： Yafei Yang Yihao Xu Haiquan liu qi Zhang Boling liu Menghua Yang Huan Dai Zunjian Ke Dong He Xiaobo feng Xiangheng Xiao Department of Physics Zhongnan Hospital of Wuhan UniversityWuhan UniversityWuhan 430072China School of Physics and Electronic Information Yunnan Normal UniversityKunming 650500China Yunnan Key Laboratory of Opto-electronic Information Technology Kunming 650500China

The oxygen evolution reaction(OER)electrocatalysts,which can keep active for a long time in acidic media,are of great significance to proton exchange membrane water ***,Ru-Co_(3)O_(4)electrocatalysts with transition metal oxide Co_(3)O_(4)as matrix and the noble metal Ru as doping element have been prepared through an ion exchange–pyrolysis process mediated by metal-organic framework,in which Ru atoms occupy the octahedral sites of Co_(3)O_(4).Experimental and theoretical studies show that introduced Ru atoms have a passivation effect on lattice *** strong coupling between Ru and O causes a negative shift in the energy position of the O p-band ***,the bonding activity of oxygen in the adsorbed state to the lattice oxygen is greatly passivated during the OER process,thus improving the stability of matrix *** addition,benefiting from the modulating effect of the introduced Ru atoms on the metal active sites,the thermodynamic and kinetic barriers have been significantly reduced,which greatly enhances both the catalytic stability and reaction efficiency of Co_(3)O_(4).

关键词： p-band modulation oxygen evolution reaction stability acidic oxygen evolution reaction(OER)

Haploids can be induced in knockout mutants of OsPLA1,but not OsDMP3 or OsDMP6,in rice

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The Crop Journal 2024年第1期12卷 213-221页

作者： Zongkai liu Yu Zhong Xiaolong qi Tai An Shuwei Guo Dong Wang Yuwen Wang Bin feng Zuofeng Zhu Shaojiang Chen Chenxu liu National Maize Improvement Center Engineering Research Center of Ministry of EducationChina Agricultural UniversityBeijing 100193China National Center for Evaluation of Agricultural Wild Plants(Rice) Department of Plant Genetics and BreedingChina Agricultural UniversityBeijing 100193China

Doubled haploid(DH)technology is an important tool in crop breeding because it can significantly accelerate the breeding ***1/MATL/NLD and ZmDMP are two key genes controlling haploid induction(HI)in maize,exhibiting a synergistic ***,it is unknown whether knock out of ZmDMP orthologs can stimulate HI in *** this study,a ZmPLA1 ortholog(OsPLA1)and two ZmDMP orthologs(OsDMP3 and OsDMP6)were identified in *** three genes encode plasma membrane-localized proteins and were highly expressed in mature *** of OsPLA1 in both Minghui 63 and Nipponbare resulted in reduced seed setting rate(SSR)and caused *** osdmp3,osdmp6 and the double mutant failed to trigger HI independently,nor increased the haploid induction rate(HIR)when combined with *** pollinations operations of QX654A with the ospla1 mutant significantly improve SSR,while reducing ***-seq profiling of mature ospla1 mutant anthers indicated that a large number of differentially expressed genes(DEGs)were enriched in redox homeostasis and lipid metabolic GO terms,plant hormone signal transduction,and MAPK signaling *** findings provide important insights towards construction of an efficient DH breeding technology and study of the molecular mechanism of HI in rice.

关键词： Doubled haploid breeding Haploid induction Mutation anlaysis Rice

Effect of Interface Bond Type on the Structure of InAs/GaSb Superlattices Grown by Metalorganic Chemical Vapor Deposition

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Chinese Physics Letters 2011年第11期28卷 194-197页

作者： LI Li-Gong liu Shu-Man LUO Shuai YANG Tao WANG Li-Jun liu feng-qi YE Xiao-Ling XU Bo WANG Zhan-Guo Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083 Department of Physics Tsinghua UniversityBeijing 100084

InAs/GaSb type-II superlattices were grown on(100)GaSb substrates by metalorganic chemical vapor *** scattering spectroscopy reveals that it is possible to grow superlattices with almost pure GaAs-like and mixed-like(plane of mixed As and Sb atoms that connect the GaSb and InAs layers)*** the InSb-like interface results in nanopipes and As contamination of the GaSb layers.X-ray diffraction and atomic force microscopy demonstrate that the superlattices with a mixed-like interface have better morphology and crystalline quality.

关键词： InAs/GaSb scattering GaSb

Metalorganic Chemical Vapor Deposition Growth of InAs/GaSb Superlattices on GaAs Substrates and Doping Studies of P-GaSb and N-InAs

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Chinese Physics Letters 2012年第7期29卷 207-209页

InAs/GaSb type-Ⅱ superlattices (SLs),Zn-doped GaSh and Si-doped InAs were grown on semi-insulating (001) GaAs substrates by metalorganic chemical vapor deposition.X-ray diffraction reveals that complete strain compensation between the SLs and the GaSb buffer layer is achieved in our SL *** relationship between the hole concentration p in GaSb and the diethylzinc (DEZn) flow rate is poc[DEZn]*** electron concentration in InAs does not show good linearity with the SiH4 flow *** growth rate of the p-GaSb epilayer is decreased as the DEZn mole fraction increases,while the growth rate of the n-InAs epilayer is weakly dependent on the SiH4 flow rate.

关键词： InAs/GaSb GaSb deposition