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Asymptotic Inference in the Random Coefficient Autoregressive Model with Time-functional Variance Noises

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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 320-346页

作者： En-wen ZHU Zi-wei DENG Han-jun ZHANG Jun CAO Xiao-hui LIU Department of Mathematics and Statistics Changsha University of Science and TechnologyChangsha 410114China School of Mathematics and Computational science Xiangtan UniversityXiangtan 411105China School of Statistics and Data science and Key Laboratory of Data Science in Finance and EconomicsJiangxi University of Finance and EconomicsNanchang 330013China

This paper considers the random coefficient autoregressive model with time-functional variance noises,hereafter the RCA-TFV *** first establish the consistency and asymptotic normality of the conditional least squares estimator for the constant *** semiparametric least squares estimator for the variance of the random coefficient and the nonparametric estimator for the variance function are constructed,and their asymptotic results are reported.A simulation study is presented along with an analysis of real data to assess the performance of our method in finite samples.

关键词： random coefficient autoregressive model time-functional variance conditional least squares semiparametric least squares

Regulate electric double layer for one-step synthesize and modulate the morphology of(oxy)hydroxides

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Nano Research 2024年第5期17卷 3675-3683页

作者： Jiaxin Liu Yue Shi Yanli Gu Zheng Lv Liang Zhao Yu Yang Tianrong Zhan Jianping Lai Lei Wang State Key Laboratory Base of Eco-Chemical Engineering International Science and Technology Cooperation Base of Eco-chemical Engineering and Green ManufacturingCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China

FeOOH have received considerable attention due to their natural abundance and *** the significant progress achieved,the one-step synthesis of integrated FeOOH is still a major ***,the current research on FeOOH catalyst still suffers from the unclear mechanism of controlling ***,density functional theory(DFT)calculations and X-ray photoelectron spectroscopy(XPS)demonstrated the strong electron-capturing and hydrogen absorption ability of Co in FeOOH,which further promotes the formation and stabilization of *** used a one-step electrodeposition method to synthesize Co introduced FeOOH integrated electrocatalyst and propose to introduce ions with different valence states to regulate the morphology of FeOOH by precise modulation of electric double layer(EDL)composition and *** prepared Co-FeOOH-K^(+)has a larger electrochemically active surface area(ECSA)(325 cm^(2))and turnover frequency(TOF)value(0.75 s^(-1)).In the electrochemical experiments of an alkaline anion exchange membrane electrolyzer,Co-FeOOH-K^(+)shows better oxygen evolution performance than commercial RuO_(2) under industrial production conditions and has good industrial application prospects.

关键词： integrated(oxy)hydroxides electrodeposition electric double layer(EDL) oxygen evolution reaction(OER) morphology regulation

Polysulfide modified PtCu intermetallic nanocatalyst with enrichment realizes efficient electrooxidation ethanol to CO_(2)

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Nano Research 2024年第4期17卷 2320-2327页

作者： Shuanglong Zhou Zheng Lv Liang Zhao Dan Zhang Zuocao Wang Yu Dai Bin Li Olga Starostenko Jianping Lai Lei Wang Key Laboratory of Eco-chemical Engineering Ministry of EducationTaishan scholar advantage and characteristic discipline team of Eco-chemical process and technologyLaboratory of Inorganic Synthesis and Applied ChemistryCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Foreign Languages Qingdao City UniversityQingdao 266106China College of Materials science and Engineering Qingdao University of Science and TechnologyQingdao 266042China Institute of Macromolecular Chemistry of the National Academy of sciences of Ukraine Kyiv 02160Ukraine Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China

The main problem faced by ethanol oxidation reaction(EOR)includes low activity,poor selectivity,and *** the study,we found that polysulfide modified on the surface of PtCu intermetallic(IM)/C can simultaneously enrich hydroxyl and ethanol,which could effectively improve the catalytic activity,CO_(2) selectivity,and durability of *** mass activity and the specific activity of the product in 1 M KOH electrolyte reached 17.83 A·mgPt^(-1) and 24.67 mA·cm^(-2).The CO_(2) selectivity of polysulfide modified product achieved 93.5%,which was 30 folds higher than Pt/*** addition,the catalyst showed high catalytic *** mechanism study demonstrates that the surface modified polysulfide could significantly boost the enrichment effect of ethanol and hydroxyl species,accelerating C–C bond cleavage and CO oxidation.

关键词： Pt CO_(2) selectivity enrichment effect ethanol oxidation reaction(EOR) electrocatalyst

菊花挥发油的药理作用及其机制研究进展（英文）

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Acupuncture and Herbal Medicine 2024年第1期 79-91页

作者：张婧苏炜强 Filipczak Nina 罗莹万安平何瑶颜士娟李翔杨明江西中医药大学现代中药制剂教育部重点实验室美国东北大学药物生物技术和纳米医学中心江西中医药大学中药固体制剂制造技术国家工程研究中心

挥发油（VO）是菊科常用植物的主要化学成分，具有抑菌、抗氧化、抗肿瘤、抗炎、解热、镇痛、抗骨质疏松、降压、镇静、催眠等多种药理活性。迄今为止，对菊花提取物中有效成分的研究主要集中在黄酮类成分，而关于VO成分的化学组成和潜... 详细信息

挥发油（VO）是菊科常用植物的主要化学成分，具有抑菌、抗氧化、抗肿瘤、抗炎、解热、镇痛、抗骨质疏松、降压、镇静、催眠等多种药理活性。迄今为止，对菊花提取物中有效成分的研究主要集中在黄酮类成分，而关于VO成分的化学组成和潜在作用机制的数据有限。本文对菊花挥发油的药理活性和作用机制进行了较为全面的综述，以期为其在药用、芳香疗法和食疗等方面应用的进一步发展奠定基础。

关键词：作用机制菊花药理活性挥发油

Responses of intra-annual runoff to forest recovery patterns in subtropical China

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Journal of Forestry Research 2021年第4期32卷 1479-1488页

作者： Zhipeng Xu Wenfei Liu Qiang Li Jianping Wu Honglang Duan Guomin Huang Yizao Ge jiangxi Province Key Laboratory for Restoration of Degraded Ecosystems&Watershed Ecohydrology Nanchang Institute of TechnologyNanchang 330099People’s Republic of China Department of Civil Engineering University of Victoria3800 Finnerty RoadVictoriaBC V8P 5C2Canada Yunnan Key Laboratory of Plant Reproductive Adaption and Evolutionary Ecology Yunnan UniversityKunming 650500People’s Republic of China

Forest recovery plays a critical role in regulating eco-hydrological processes in forested ***,characteristics of the intra-annual runoff variation associated with different forest recovery patterns remain poorly *** this study,three forest change periods were identified,the baseline period(1961-1985),reforestation period(1986-2000)and fruit tree planting period(2001-2016).We selected the magnitude of seasonal runoff(wet and dry seasons)and distribution characteristics,i.e.,non-uniformity coefficient(C_(v)),complete accommodation coefficient(C_(r)),concentration ratio(C_(n)),concentration period(C_(d)),absolute variation ratio(ΔR)and relative variation ratio(C_(max)).The pair-wise approach evaluated the intra-annual runoff variation characteristics between forest change *** indicate that reforestation decreased wet season runoff and increased dry season *** contrast,fruit tree planting increased wet season runoff and had no significant effect on dry season *** intra-annual runoff distribution characteristics,reforestation significantly reduced the C_(v),C_(r),C_(n)and C_(max).Distribution of the intra-annual runoff in the fruit tree planting period was not significantly different from the *** concluded that reforestation reduced the occurance of extreme water conditions in wet and dry seasons and effectively increased the stability of the intra-annual *** contrast,fruit tree planting increased instability and fluctuation of the intra-annual runoff after *** characteristics of the intra-annual runoff to fruit tree planting was similar to those of the ***,adopting fruit tree planting practices to regulate intra-annual runoff characteristics may not be a practical approach,and impacts of different reforestation practices should be ascertained in our study *** implications of this study should guide regional land-water management,and this study adds to the understanding o

关键词： Intra-annual runoff variation Seasonal runoff Forest recovery Reforestation Fruit tree planting

Graphdiyne scaffold anchored highly dispersed ruthenium nanoparticles as an efficient cathode catalyst for rechargeable Li-CO_(2) battery

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Chinese Chemical Letters 2024年第1期35卷 552-557页

作者： Yiru Ma Huiqi Qu Wenna Wang Ziyang Guo Yueqin Yu Feng Liu Bin Yu Minge Tian Zhenjiang Li Bin Li Lei Wang College of Chemistry and Molecular Engineering State Key Laboratory Base of Eco-Chemical EngineeringInternational Science and Technology Cooperation Base of Eco-Chemical Engineering and Green ManufacturingQingdao University of Science and TechnologyQingdao 266042China College of Materials science and Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China Biomedical Sensing Engineering technology Research Center Shandong UniversityJi'nan 250100China Scientific Green(Shandong)Environmental technology Co. Ltd.Jining Economic Development ZoneJining 272499China

Lithium (Li)-CO_(2) battery is rising as an attractive energy-storage system with the competence of CO_(2) conversion/fixation. However, its practical development is seriously hindered by the high overpotential. Herein, a rational design on a highly catalytic Li-CO_(2) battery electrode built by graphdiyne powder as a multi-functional laminar scaffold with anchored highly dispersed Ru nanoparticles is explored. The strong interaction between the abundant acetylenic bond sites of graphdiyne scaffold and Ru nanoparticles can effectively promote the electrochemical progress and reduce the voltage polarization. The unique channels architecture of the cathodic catalyst with enough space not only accelerates CO_(2) diffusion and electrons/Li+ transport, but also allows a large amount of accommodation for discharged product (Li2CO3) to assure an advanced capacity. The corresponding Li-CO_(2) battery displays an advanced discharged capacity of 15,030 mAh/g at 500 mA/g, great capacity retention of 8873 mAh/g at 2 A/g, high coulombic efficiency of 97.6% at 500 mA/g and superior life span for 120 cycles with voltage gap of 1.67 V under a restricted capacity of 1000 mAh/g at 500 mA/g. Ex/in-situ studies prove that synergy between Ru nanoparticles and acetylene bonds of GDY can boost the round-trip CO_(2)RR and CO_(2)ER kinetics.

关键词： Nanopores Li-CO_(2)battery Anchored Ru nanoparticles Graphdiyne Synergistic effect

The decoupling between gas exchange and water potential of Cinnamomum camphora seedlings during drought recovery and its relation to ABA accumulation in leaves

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Journal of Plant Ecology 2020年第6期13卷 683-692页

作者： Honglang Duan Defu Wang Xiaohua Wei Guomin Huang Houbao Fan Shuangxi Zhou Jianping Wu Wenfei Liu David TTissue Songze Wan Institute for Forest Resources&Environment of Guizhou Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou ProvinceCollege of ForestryGuizhou UniversityGuiyang 550025China jiangxi Provincial Key Laboratory for Restoration of Degraded Ecosystems&Watershed Ecohydrology Nanchang Institute of TechnologyNanchang 330099China Department of Earth Environmental and Geographic SciencesUniversity of British Columbia OkanaganKelownaBC V1V 1V7Canada The New Zealand Institute for Plant and Food Research Ltd. Hawke’s BayNew Zealand Laboratory of Ecology and Evolutionary Biology Yunnan UniversityKunming 650500China Hawkesbury Institute for the Environment Hawkesbury CampusWestern Sydney UniversityLocked Bag 1797PenrithNSW 2751Australia College of Forestry Jiangxi Agricultural UniversityNanchang 330045China

Aims Drought stress and the degree of drought severity are predicted to rise under highly variable patterns of precipitation due to climate change,while the capacity of trees to cope with drought recovery through physiological and biochemical adjustment remains *** aimed to examine the coupling of physiology and biochemistry in trees during drought and the following *** Potted seedlings of Cinnamomum camphora were grown under well watered conditions prior to the experimental drought stress,which was initiated by withholding *** were rewatered following attainment of two drought severities:mild drought(stomatal closure)and moderate drought(ψxylem=−1.5 MPa).We measured leaf-level water potential,gas exchange(photosynthesis and stomatal conductance),abscisic acid(ABA),proline and non-structural carbohydrates(NSCs)concentrations in seedlings of *** during drought and a 4-day *** Findings We found that drought severity largely determined physiological and biochemical responses and affected the rate of *** closure occurred at the mild drought stress,accompanied with ABA accumulation in leaves and decline in water potential,while leaf proline accumulation and variable NSC were evident at the moderate drought *** severe drought stress led to delayed recovery of gas exchange,but it did not have significant effect on water potential *** relationships of water potential and gas exchange differed during drought stress and post-drought *** was tight coupling between water potential and gas exchange during drought,but not during rewatering due to high ABA accumulation in leaves,thereby delaying recovery of stomatal *** results demonstrate that ABA could be an important factor in delaying the recovery of stomatal conductance following rewatering and after water potential recovery of ***,greater drought severity had significant impacts on the rate of recove

关键词： drought recovery gas exchange ABA NSC proline

Roadmap for rechargeable batteries:present and beyond

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science China Chemistry 2024年第1期67卷 13-42页

作者： Sen Xin Xu Zhang Lin Wang Haijun Yu Xin Chang Yu-Ming Zhao Qinghai Meng Pan Xu Chen-Zi Zhao Jiahang Chen Huichao Lu Xirui Kong Jiulin Wang Kai Chen Gang Huang Xinbo Zhang Yu Su Yao Xiao Shu-Lei Chou Shilin Zhang Zaiping Guo Aobing Du Guanglei Cui Gaojing Yang Qing Zhao Liubing Dong Dong Zhou Feiyu Kang Hu Hong Chunyi Zhi Zhizhang Yuan Xianfeng Li Yifei Mo Yizhou Zhu Dongfang Yu Xincheng Lei Jianxiong Zhao Jiayi Wang Dong Su Yu-Guo Guo Qiang Zhang Jun Chen Li-Jun Wan CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China University of Chinese Academy of sciences.Beijing 100049 China Institute of Advanced Battery Materials and Devices Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China Beijing Key Laboratory of Green Chemical Reaction Engineering and technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830046China Department of Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChangchun 130022China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaide 5000Australia Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Frontiers science Center for New Organic Matter Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China College of Chemistry and Materials science Jinan UniversityGuangzhou 511443China Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China Department of Materials science and Engineering City University of Hong KongHong Kong 999077China Division of Energy Storage Dalian National Laboratory for Clean Energy(DNL)Dalian Institute of Chem

Rechargeable batteries currently hold the largest share of the electrochemical energy storage market,and they play a major role in the sustainable energy transition and industrial decarbonization to respond to global climate *** to the increased popularity of consumer electronics and electric vehicles,lithium-ion batteries have quickly become the most successful rechargeable batteries in the past three decades,yet growing demands in diversified application scenarios call for new types of rechargeable *** efforts are made to developing the next-generation post-Li-ion rechargeable batteries,which include,but are not limited to solid-state batteries,lithium–sulfur batteries,sodium-/potassium-ion batteries,organic batteries,magnesium-/zinc-ion batteries,aqueous batteries and flow *** the great achievements,challenges persist in precise understandings about the electrochemical reaction and charge transfer process,and optimal design of key materials and interfaces in a *** roadmap tends to provide an overview about the current research progress,key challenges and future prospects of various types of rechargeable *** computational methods for materials development,and characterization techniques will also be discussed as they play an important role in battery research.

关键词： energy storage rechargeable batteries battery materials electrochemistry

Hybrid π-conjugated polymers from dibenzo pentacyclic centers：precursor design,electrosynthesis and electrochromics

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science China Chemistry 2017年第1期60卷 38-53页

作者： Kaiwen Lin Shuai Chen Baoyang Lu Jingkun Xu School of Pharmacy Jiangxi Science & Technology Normal University Nanchang 330013 China

π-Conjugated polymers(CPs)represent one of the quite important and rapidly growing branches of flexible electrochromic *** hybrid CPs employing dibenzo pentacycles(fluorenes,carbazoles,dibenzothiophenes,and dibenzofuran)as the backbones have received considerable attention owing to their special structures and interesting electrochromic *** studies show that polymers from these structures exhibit decent contrast ratios,favorable coloration efficiencies,low switching voltages,fast response time,excellent stability,and color ***,their electrochromic properties significantly depend on fine-tailoring of precursor monomer structures,and polymerization techniques and *** review devotes to showing a clear picture of the research progress of dibenzo pentacycle-centered CPs via electrochemical polymerization,including fluorenes,carbazoles,dibenzothiophenes,and dibenzofuran-based hybrid electrochromic *** influences of the tailored precursor structures on their electropolymerization and resultant polymer performances are highlighted,aiming at providing an insight for the development of novel fused ring-based polymer electrochromic materials.

关键词： fluorenes carbazoles dibenzothiophenes dibenzofuran polymer synthesis electrochemistry electrochromism