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Spatio-temporal variability of terrestrial water storage in the Yangtze River Basin: Response to climate changes

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Geodesy and Geodynamics 2023年第3期14卷 201-211页

作者： Yaoguo Wang zhaoyang sun Qiwen Wu Jun Fang Wei Jia Luoyang Urban Planning&Architecture Design Research Institute Co. Ltd.Luoyang 471000China Luoyang Polytechnic Luoyang 471000China School of Geodesy and Geomatics Wuhan UniversityWuhan 430079China The Seventh Engineering Company of CCCC Fourth Harbor Engineering Co. Ltd.Guangzhou 511455China

The Yangtze River Basin(YRB)is an important region for China's economic development.However,it has a complex terrain layout,most of which is affected by monsoon weather,and the geographical and temporal distribution of water resources is severely unbalanced.Therefore,the detailed analysis of spatio-temporal water mass changes is helpful to the development and rational utilization of water resources in the YRB.In this study,the variation of terrestrial water storage(TWS)is monitored by Gravity Recovery and Climate Experiment(GRACE)satellite gravity.We find that the University of Texas Center for Space Research(CSR)solution shows a notable difference with the Jet Propulsion Laboratory(JPL)in space,but the general trend is consistent in time series.Then the GRACE inferred water mass variation reveals that the YRB has experienced several drought and flood events over the past two decades.Global Land Data Assimilation System(GLDAS)results are similar to GRACE.Furthermore,the overall precipitation trend tends to be stable in space,but it is greatly influenced by the strong El Nino-~Southern Oscillation(ENSO),which is the response to global climate change.The upper YRB is less affected by ENSO and shows a more stable water storage signal with respect to the lower YRB.

关键词： Yangtze river basin Terrestrial water storage GRACE Time-varying gravity field

A General Strategy to Electrospin Nanofibers with Ultrahigh Molecular Chain Orientation

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Engineering 2023年第10期29卷 179-187页

作者： Xian Wen Jian Xiong zhaoyang sun Liming Wang Jianyong Yu Xiaohong Qin Key Laboratory of Textile Science and Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

The degree of polymer chain orientation is a key structural parameter that determines the mechanical and physical properties of fibers.However,understanding and significantly tuning the orientation of fiber macromolecular chains remain elusive.Herein,we propose a novel electrospinning technique that can efficiently modulate molecular chain orientation by controlling the electric field.In contrast to the typical electrospinning method,this technique can piecewise control the electric field by applying high voltage to the metal ring instead of the needle.Benefiting from this change,a new electric field distribution can be realized,leading to a non-monotonic change in the drafting force.As a result,the macromolecular chain orientation of polyethylene oxide(PEO)nanofibers was significantly improved with a recordhigh infrared dichroic ratio.This was further confirmed by the sharp decrease in the PEO jet fineness of approximately 80%and the nanofiber diameter from 298 to 114 nm.Interestingly,the crystallinity can also be adjusted,with an obvious drop from 74.9%to 31.7%,which is different from the high crystallinity caused by oriented chains in common materials.This work guides a new perspective for the preparation of advanced electrospun nanofibers with optimal orientation–crystallinity properties,a merited feature for various applications.

关键词： Molecular orientation Electrospinning Nanofibers Electric field Polyethylene oxide

Chemical oxidation of arsenic in the environment and its application in remediation: A mini review

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Pedosphere 2023年第1期33卷 185-193页

作者： Chaolei YUAN Qi LI zhaoyang sun Wenjun ZHANG Jiangrong CHEN Zheng CHEN Shuo NA Hongwen sun Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution ControlCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China The Institute of Seawater Desalination and Multipurpose Utilization Ministry of Natural ResourcesTianjin 300192China Department of Health and Environmental Sciences Xi’an Jiaotong-Liverpool UniversitySuzhou 215123China

Arsenic(As)contamination in soil and water poses a serious threat to the ecosystem health and human beings,and is of widespread concern.The main As species found in soil and water are arsenite As(Ⅲ)and arsenate As(V).Because As(Ⅲ)is more toxic and often more mobile than As(Ⅴ),many remediation strategies aim to oxidize As(Ⅲ)to As(Ⅴ).In the environment,the reduction of As(Ⅴ)under anaerobic conditions is mainly mediated by microorganisms,but the oxidation of As(Ⅲ)under aerobic conditions can be mediated primarily by chemical processes.This article first reviews the existing knowledge on chemical oxidation of As(Ⅲ)in the environment,with an emphasis on the roles of iron(Fe)and manganese(Mn)oxides.The application of Fe and Mn oxides for the remediation of As-contaminated soil and water is then summarized.The oxidation of As(Ⅲ)by oxygen is very slow in the absence of catalysts.Many Mn oxides,on the other hand,can efficiently oxidize As(Ⅲ).Although the oxidation of As(Ⅲ)by Fe(Ⅲ)is also slow,this process can be accelerated by light or Fe(Ⅱ).Iron and Mn oxides are widely used for the remediation of As-contaminated soil and water,with Fe oxides generally acting as absorbents while Mn oxides as oxidants.To better understand and regulate As transformation and transport in the environment,further study is needed on the mechanisms and influencing factors of As(Ⅲ)oxidation by Fe and Mn oxides,and the development of innovative methods and materials based on Fe and Mn oxides are desired.

关键词： As contamination iron oxide manganese oxide soil water

A gradient solid electrolyte interphase with high Li+conductivity induced by bisfluoroacetamide additive for stable lithium metal batteries

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Nano Research 2023年第6期16卷 8425-8432页

作者： zhaoyang sun Ziyue Wen Yi Chen Yue Ma Jinxiang Zhang Yuejiao Li Li Li Renjie Chen Beijing Key Laboratory of Environmental Science and Engineering School of Material Science&EngineeringBeijing Institute of TechnologyBeijing 100081China Institute of Advanced Technology Beijing Institute of TechnologyJinan 250300China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Stable Li metal anodes have become the driving factor for high-energy-density battery systems.However,uncontrolled growth of Li dendrite hinders the application of rechargeable Li metal batteries(LMBs).Here,a multifunctional electrolyte additive bisfluoroacetamide(BFA)was proposed to facilitate high-performance LMBs.The uniform and dense deposition of Li^(+) was achieved due to the reduced nucleation and plateau overpotential by the addition of BFA.Moreover,X-ray photoelectron spectroscopy(XPS)tests reveal a gradient solid electrolyte interface(SEI)structure on the Li metal surface.Cyclic voltammetry(CV)curves at different sweep speeds prove the formation of pseudocapacitance at the electrode-electrolyte interface,which accelerates the Li+transport rate and protects the electrode structure.The low activation energy also indicates the ability of rapid Li^(+) transportation in electrolyte bulk.Therefore,the Li||Li symmetric cells with 1.0 wt.%BFA electrolyte exhibit good cycling performance at 0.5 mA·cm^(−2)for over 2000 h,and Li||LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NCM622)full cells maintain a high capacity for 200 cycles at 1 C rate.

关键词： electrolytes additives solid electrolyte interphase Li dendrites Li metal batteries

Effects of natural organic matter on cadmium mobility in paddy soil: A review

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Journal of Environmental Sciences 2021年第6期33卷 204-215页

作者： Chaolei Yuan Qi Li zhaoyang sun Hongwen sun Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution ControlCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China

Cadmium(Cd) contamination in paddy soil has caused public concern. The uptake of Cd by rice plants depends on soil Cd mobility, which is in turn substantially influenced by organic matter(OM). In this review, we first summarize the fate of Cd in soil and the role of OM. We then focus on the effects of OM on Cd mobility in paddy soil and the factors influencing the remedial effectiveness of OM amendments. We further discuss the performance of straw incorporation in the remediation of Cd-contaminated paddy soils reported in laboratory and field studies. Considering the huge production of organic materials(such as straw) in agriculture, the use of natural OM for soil remediation has obvious appeal due to the environmental benefits and low cost. Although there have been successful application cases, the properties of OM amendments and soil can significantly affect the remedial performance of the OM amendments. Importantly, straw incorporation alone does not often decrease the mobility of Cd in soil or the Cd content in rice grains. Careful evaluation is required when considering natural OM amendments, and the factors and mechanisms that influence their remedial effectiveness need further investigation in paddy soil with realistic Cd concentrations.

关键词： Cadmium Mobility Organic matter Paddy soil Remediation

Emerging design principles,materials,and applications for moisture-enabled electric generation

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eScience 2022年第1期2卷 32-46页

作者： zhaoyang sun Xian Wen Liming Wang Dongxiao Ji Xiaohong Qin Jianyong Yu Seeram Ramakrishna Key Laboratory of Textile Science&Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai201620China Department of Mechanical Engineering National University of Singapore117574Singapore Innovation Center for Textile Science and Technology Donghua UniversityShanghai201620China

Smart generators that collect energy from the ambient environment are a new approach for meeting growing global energy needs.Moisture is one of the most abundant resources in the ambient environment,and using it to generate electricity has aroused great interest in recent years.In this review,we first summarize the emerging design principles of moisture power generation,including ion diffusion,streaming potential,and charged surface potential.Then,based on these fundamental principles,we systematically summarize the materials thus far known to be suitable for moisture power generation.Finally,we highlight the application of moisture energy generators in various fields,such as thermoelectricity,solar thermal evaporation,capacitors,strain sensors,and information storage,and discuss current challenges and future prospects for the development of moisture energy generators.

关键词： Energy conversion Moisture-enabled electric generator Ion diffusion Streaming potential Smart generator

Silicon nitride-based Kerr frequency combs and applications in metrology

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Advanced Photonics 2022年第6期4卷 6-22页

作者： zhaoyang sun Yang Li Benfeng Bai Zhendong Zhu Hongbo sun Tsinghua University State Key Laboratory of Precision Measurement and InstrumentsDepartment of Precision InstrumentBeijingChina National Institute of Metrology BeijingChina

Kerr frequency combs have been attracting significant interest due to their rich physics and broad applications in metrology,microwave photonics,and telecommunications.In this review,we first introduce the fundamental physics,master equations,simulation methods,and dynamic process of Kerr frequency combs.We then analyze the most promising material platform for realizing Kerr frequency combs—silicon nitride on insulator(SNOI)in comparison with other material platforms.Moreover,we discuss the fabrication methods,process optimization as well as tuning and measurement schemes of SNOI-based Kerr frequency combs.Furthermore,we highlight several emerging applications of Kerr frequency combs in metrology,including spectroscopy,ranging,and timing.Finally,we summarize this review and envision the future development of chip-scale Kerr frequency combs from the viewpoint of theory,material platforms,and tuning methods.

关键词： Kerr frequency comb silicon nitride Lgiato–Lefever equation damascene process precision measurements

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汉代生育禁忌习俗中的性别与权力

河南师范大学学报（哲学社会科学版） 2024年第2期51卷 108-113页

作者：孙朝阳焦杰陕西师范大学历史文化学院陕西西安710119

两汉社会出现了比先秦时期更为严苛的生育禁忌,人们普遍认为产妇不洁且危险,产孕异常、忌日出生的婴儿会妨害父母。因此,承担生育重任的产妇和某些“特殊婴儿”被当作禁忌对象,产妇在分娩之前必须离开日常生活的居所,到特定地点分娩,产... 详细信息

两汉社会出现了比先秦时期更为严苛的生育禁忌,人们普遍认为产妇不洁且危险,产孕异常、忌日出生的婴儿会妨害父母。因此,承担生育重任的产妇和某些“特殊婴儿”被当作禁忌对象,产妇在分娩之前必须离开日常生活的居所,到特定地点分娩,产孕异常、忌日出生的新生儿也会被弃之不育。两汉社会流行的生育禁忌观念,不仅是对产妇不洁和“特殊婴儿”妨害父母的担忧,背后还隐藏着更为深层的性别与权力关系。汉代父权制文化深入发展,丈夫在家庭中的权力不断增长,夫权不断强化,针对产妇和婴儿的一系列生育禁忌实则是权力压迫和性别歧视在家庭关系中渗透的结果。

关键词：汉代社会生育禁忌驱逐产妇生子不举性别与权力

Intracellular pH-responsive iron-catechin nanoparticles with osteogenic/anti-adipogenic and immunomodulatory effects for efficient bone repair

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Nano Research 2022年第2期15卷 1153-1161页

作者： Ying Kong Feng Liu Baojin Ma Wenhan Wang Liang Li Xiaoying Xu zhaoyang sun Hongru Yang Yuanhua Sang Dong Li Gang Li Chao Liu Shuhua Wang Hong Liu State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China Department of Periodontology School and Hospital of StomatologyCheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue RegenerationJinan 250012China Department of Pharmacology School of Basic Medical SciencesShandong UniversityJinan 250012China Department of Pathology Jinan Women and Childrens Health HospitalJinan 250000China Department of Oral and Maxillofacial Surgery Qilu Hospital of Shandong UniversityJinan 250012China Cryomedicine Laboratory Qilu Hospital of Shandong UniversityJinan 250012China Neurological Surgery Qilu Hospital of Shandong UniversityJinan 250012China Advanced Medical Research Institute Shandong UniversityJinan 250100China Institute for Advanced Interdisciplinary Research University of JinanJinan 250022China

Osteoimmunomodulation was identified as a new and important strategy to enhance osteogenic differentiation together with other osteogenic approaches.However,approaches regulating osteogenic differentiation and macrophage polarization to remodel an osteoinductive microenvironment are separate and complicated.Therefore,the design and synthesis of one biomaterial that couples the osteogenic performance and immunomodulatory ability is a major challenge for efficient bone repair.In this study,self-assembled iron-catechin nanoparticles(Fe-cat NPs)were designed based on the coordinated reaction between iron ions and catechin and synthesized via a facile one-pot strategy.Interestingly,Fe-cat NPs show intracellular pH-responsive disassembly and release catechin molecules under the low pH of lysosomes after endocytosis.This strategy delivers catechin intracellularly and then enhances the osteogenic differentiation while inhibits the adipogenic differentiation of human adipose-derived stem cells(hADSCs).More importantly,Fe-cat NPs remodel the osteogenic immune microenvironment by resisting inflammation and promoting M2 polarization of macrophages.As a promising metal-organic nanodrug,the intracellular pH-responsive Fe-cat NPs significantly enhance the therapeutic effect of bone regneration by orchestrating osteogenic differentiation and immunomodulation,which may have great potential in bone tissue engineering.

关键词： Fe-catechin nanoparticles osteogenesis adipogenesis immunomodulation intracellular pH-responsive