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Fast spreading of surface ozone in both temporal and spatial scale in Pearl River Delta

Journal of Environmental Sciences 2024年第3期137卷 540-552页

作者： Tianhui Cao haichao wang Lei Li Xiao Lu Yiming Liu Shaojia Fan School of Atmospheric Sciences Sun Yat-sen University and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary Key Laboratory of Tropical Atmosphere-Ocean SystemMinistry of EducationZhuhai 519082China

Surface ozone(O_(3))is a major air pollutant and draw increasing attention in the Pearl River Delta(PRD),China.Here,we characterize the spatial-temporal variability of ozone based on a dataset obtained from 57 national monitoring sites during 2013-2019.Our results show that:(1)the seasonal difference of ozone distribution in the inland and coastal areas was significant,which was largely affected by the wind pattern reversals related to the East Asian monsoon,and local ozone production and destruction;(2)the daily maximum 8hr average(MDA8 O_(3))showed an overall upward trend by 1.11 ppbv/year.While the trends in the nine cities varied differently by ranging from-0.12 to 2.51 ppbv/year.The hot spots of ozone were spreading to southwestern areas from the central areas since 2016.And ozone is becoming a year-round air pollution problem with the pollution season extending to winter and spring in PRD region.(3)at the central and southwestern PRD cities,the percentage of exceedance days from the continuous type(defined as≥3 days)was increasing.Furthermore,the ozone concentration of continuous type was much higher than that of scattered exceedance type(<3 days).In addition,although the occurrence of continuous type starts to decline since2017,the total number of exceedance days during the continuous type is increasing.These results indicate that it is more difficult to eliminate the continuous exceedance than the scatter pollution days and highlight the great challenge in mitigation of O_(3)pollution in these cities.

关键词： Surface ozone pollution Ozone trend Spatial and temporal variability Pearl River Delta Pollution mitigation

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Research Progress on Economic Forest Water Stress Based on Bibliometrics and Knowledge Graph

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Phyton-International Journal of Experimental Botany 2024年第5期93卷 843-858页

作者： Xin Yin Shuai wang Chunguang wang haichao wang Zheying Zong Zeyu Ban College of Mechanical and Electrical Engineering Inner Mongolia Agricultural UniversityHohhot010018China College of Energy and Traffic Engineering Inner Mongolia Agricultural UniversityHohhot010018China Key Laboratory of Biopesticide Creation and Resource Utilization of Universities Inner Mongolia Agricultural UniversityHohhotChina

This study employed the bibliometric software CiteSpace 6.1.R6 to analyze the correlation between thermal infrared,spectral remote sensing technology,and the estimation of economic forest water stress.It aimed to review the development and current status of this field,as well as to identify future research trends.A search was conducted on the China National Knowledge Infrastructure(CNKI)database using the keyword“water stress”for relevant studies from 2003 to 2023.The visual analysis function of CNKI was used to generate the distribution of annual publication volume,and CiteSpace 6.1.R6 was utilized to create network maps illustrating collaboration among authors and institutions.The study also analyzed the hotspots and frontiers of economic forest water stress.As a result,a total of 6664 academic journal articles related to water stress were retrieved.Considerable collaboration networks were observed among scholars and institutions,with a focus on using crown temperature monitoring to diagnose crop water stress.Based on the research findings,it was evident that the primary research trend involved the use of thermal infrared and spectral remote sensing technology for estimating water stress,making it a future research hotspot.

关键词： Water stress thermal infrared spectral visual analysis knowledge map CiteSpace

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Sustainability Evaluation of Modern Photovoltaic Agriculture Based on Interval Type-2 Fuzzy AHP-TOPSIS and Least Squares Support Vector Machine Optimized by Fireworks Algorithm

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Energy Engineering 2022年第1期119卷 163-188页

作者： Yi Liang haichao wang Wei-Chiang Hong School of Management Hebei GEO UniversityShijiazhuang050031China Strategy and Management Base of Mineral Resources in Hebei Province Hebei GEO UniversityShijiazhuang050031China Long Yuan(Beijing)Wind Power Engineering&Consulting Co. Ltd.Beijing100034China Department of Information Management Oriental Institute of TechnologyNew TaipeiTaiwanChina

Photovoltaics(PV)has been combined with many other industries,such as agriculture.But there are many problems for the sustainability of PV agriculture.Timely and accurate sustainability evaluation of modern photovoltaic agriculture is of great significance for accelerating the sustainable development of modern photovoltaic agriculture.In order to improve the timeliness and accuracy of evaluation,this paper proposes an evaluation model based on interval type-2 Fuzzy AHP-TOPSIS and least squares support vector machine optimized by fireworks algorithm.Firstly,the criteria system of modern photovoltaic agriculture sustainability is constructed from three dimensions including technology sustainability,economic sustainability and social sustainability.Then,analytic hierarchy process(AHP)and technique for order preference by similarity to an ideal solution(TOPSIS)methods are improved by using interval type-2 fuzzy theory,and the traditional evaluation model based on interval type-2 Fuzzy AHP-TOPSIS is obtained,and the improved model is used for comprehensive evaluation.After that,the optimal parameters of least squares support vector machine(LSSVM)model are obtained by Fireworks algorithm(FWA)training,and the intelligent evaluationmodel for the sustainability of modern photovoltaic agriculture is constructed to realize fast and intelligent calculation.Finally,an empirical analysis is conducted to demonstrate the scientificity and accuracy of the proposed model.This study is conducive to the comprehensive evaluation of the sustainability of modern photovoltaic agriculture,and can provide decision-making support for more reasonable development model in the future of modern photovoltaic agriculture.

关键词： Modern photovoltaic agriculture sustainability evaluation interval type-2 fuzzy numbers AHP TOPSIS FWA LSSVM

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Formation mechanism and control strategy for particulate nitrate in China

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Journal of Environmental Sciences 2023年第1期123卷 476-486页

作者： haichao wang Keding Lu Zhaofeng Tan Xiaorui Chen Yuhan Liu Yuanhang Zhang School of Atmospheric Sciences Sun Yat-sen UniversityGuangzhou 510275China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Institute of Energy and Climate Research IEK-8:TroposphereForschungszentrum Jülich GmbHJülich 52428Germany Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China China Institute of Atomic Energy Beijing 100193China

Over the past decade,fine particulate matter(PM)pollution in China has been abated significantly,benefiting from strict emission control measures,but particulate nitrate continues to rise.Here,we review the progress in particulate nitrate(p NO3-)pollution characterization,nitrate formation mechanisms,and the proposed control strategies in China.The spatial and temporal distributions of p NO3-are summarized.The current status of knowledge on the chemical mechanism is updated,and the significance of its formation pathways is assessed by various approaches such as field observation and modelling of nitrate production rate,as well as isotopic analysis.The factors impacting p NO3-formation and the corresponding pollution regulation strategies are discussed,in which the importance of atmospheric oxidation capacity and ammonia are addressed.Finally,the challenges and open questions in p NO3-pollution control in China are outlined.

关键词： Particulate nitrate Reactive nitrogen Particulate matter Formation mechanism Air pollution control

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Sustainability Intelligent Evaluation of Regional Microgrid Interconnection System Based on Combination Entropy Weight Rank Order-TOPSIS and NILA-KELM

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Energy Engineering 2022年第3期119卷 1075-1101页

作者： haichao wang Yingying Fan Weigao Meng Qiaoran Yang Long Yuan(Beijing)Wind Power Engineering&Consulting Co. Ltd.Beijing100034China School of Art Hebei GEO UniversityShijiazhuang050031China Strategy and Management Base of Mineral Resources in Hebei Province Hebei GEO UniversityShijiazhuang050031China School of Urban Geology and Engineering Hebei GEO UniversityShijiazhuang050031China School of Management Hebei GEO UniversityShijiazhuang050031China

Sustainability evaluation of regional microgrid interconnection system is conducive to a profound and comprehensive understanding of the impact of interconnection system projects.In order to realize the comprehensive and scientific intelligent evaluation of the system,this paper proposes an evaluation model based on combination entropy weight rank order-technique for order preference by similarity to an ideal solution(TOPSIS)and Niche Immune Lion Algorithm-Extreme Learning Machine with Kernel(NILAKELM).Firstly,the sustainability evaluation indicator system of the regional microgrid interconnection system is constructed fromfour aspects of economic,environmental,social,and technical characteristics,and the evaluation indicators are explained.Then,the classical evaluationmodel based on TOPSIS is constructed,and the entropy weight method and rank order method(RO)are coupled to obtain the indicator weight.The niche immune algorithm is used to improve the lion algorithm,and the improved lion algorithm is used to optimize the parameters of KELM,and the intelligent evaluation model based on NILA-KELM is obtained to realize fast real-time calculation.Finally,the scientificity and accuracy of themodel proposed in this paper are verified.The model proposed in this paper has the lowest RMSE,MAE and RE values,indicating that its intelligent evaluation results are the most accurate.This study is conducive to the horizontal comparison of the overall performance of regional microgrid interconnection system projects,helps investors to choose the most promising project scheme,and helps the government to find feasible project.

关键词： Regional microgrid interconnection system intelligent evaluation of sustainability combination entropy weight rank order TOPSIS NILA KELM

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Increased mtDNA mutation frequency in oocytes causes epigenetic alterations and embryonic defects

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National Science Review 2022年第10期9卷 67-81页

作者： Longsen Han Yujia Chen Ling Li Chao Ren haichao wang Xinghan Wu Juan Ge Wenjie Shu Minjian Chen Qiang wang State Key Laboratory of Reproductive Medicine Suzhou Municipal Hospital Nanjing Medical University Department of Human Anatomy and Histoembryology Nanjing University of Chinese Medicine Beijing Institute of Microbiology and Epidemiology Key Laboratory of Modern Toxicology of Ministry of Education School of Public Health Nanjing Medical University Center for Global Health School of Public Health Nanjing Medical University

Mitochondria are essential for female reproductive processes,yet the function of mitochondrial D NA(mtDNA) mutation in oocytes remains elusive.By employing an mtDNA mutator(Polgm) mouse model,we found the fetal growth retardation and placental dysfunction in post-implantation embryos derived from Polgm oocytes.Remarkably,Polgm oocytes displayed the global loss of DNA methylation;following fertilization,zygotic genome experienced insufficient demethylation,along with dysregulation of gene expression.Spindle-chromosome exchange experiment reve aled that cytoplasmic factors in Polgm oocytes are responsible for such a deficient epigenetic remodeling.Moreover,metabolomic profiling identified a significant reduction in the a-ketoglutarate(aKG) level in oocytes from Polgm mice.Importantly,aKG supplement restored both D NA methylation state and transcriptional activity in Polgmembryos,conse quently preventing the developmental defects.Our findings uncover the important role of oocyte mtDNA mutation in controlling epigenetic reprogramming and gene expression during embryogenesis.a KG deserves further evaluation as a potential drug for treating mitochondrial dysfunction-related fertility decline.

关键词： mtDNA metabolism oocyte embryo epigenetics

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Cognitive J^(2)SAC:Joint Jamming,Sensing,and Communication Under Antagonistic Environment

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中国通信:英文版 2023年第9期20卷 78-95页

作者： Jiangchun Gu Guoru Ding Yizhen Yin haichao wang Yitao Xu Yehui Song College of Communications Engineering Army Engineering UniversityNanjing 210007China College of Joint Design and Innovation Xi’an Jiaotong UniversityXi’an 710049China

Integrated sensing and communication(ISAC)is regarded as a recent advanced technology,which is expected to realize the dual functions of sensing and communication simultaneously in one system.Nevertheless,it still faces the challenges of the information security and transmission robustness caused by the openness of wireless channel,especially under antagonistic environment.Hence,this article develops a generalized framework,named cognitive joint jamming,sensing and communication(cognitive J2SAC),to empower the current sensing/communication/jamming system with a“brain”for realizing precise sensing,reliable communication and effective jamming under antagonistic environment.Three kinds of gains can be captured by cognitive J2SAC,including integrated gain,cooperative gain and cognitive gain.Moreover,we highlight the enabling mechanism among jamming,sensing,and communication,as well as illustrating several typical use cases of cognitive J2SAC.Furthermore,several key enabled technologies are analyzed and a typical sensing enhance integrated communication and jamming case study is discussed to verify the effectiveness of the proposed method.Last but not the least,the future directions are listed before concluding this article.Integrated sensing and communication(ISAC)is regarded as a recent advanced technology,which is expected to realize the dual functions of sensing and communication simultaneously in one system.Nevertheless,it still faces the challenges of the information security and transmission robustness caused by the openness of wireless channel,especially under antagonistic environment.Hence,this article develops a generalized framework,named cognitive joint jamming,sensing and communication(cognitive J2SAC),to empower the current sensing/communication/jamming system with a“brain”for realizing precise sensing,reliable communication and effective jamming under antagonistic environment.Three kinds of gains can be captured by cognitive J2SAC,including integrated gain,cooperative gain and cognitive gain.Moreover,we

关键词： integrated sensing and communication(ISAC) information security joint jamming,sensing and communication(J2SAC) cognition theory

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Anthropogenic monoterpenes aggravating ozone pollution

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National Science Review 2022年第9期9卷 178-185页

作者： haichao wang Xuefei Ma Zhaofeng Tan Hongli wang Xiaorui Chen Shiyi Chen Yaqin Gao Ying Liu Yuhan Liu Xinping Yang Bin Yuan Limin Zeng Cheng Huang Keding Lu Yuanhang Zhang State Key Joint Laboratory of Environmental Simulation and Pollution Control State Environmental Protection Key Laboratory of Atmospheric Ozone Pollution ControlCollege of Environmental Sciences and Engineering Peking University School of Atmospheric Sciences Sun Yat-sen University Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary Key Laboratory of Tropical Atmosphere–Ocean System Ministry of Education Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Institute of Energy and Climate Research IEK-8:TroposphereForschungszentrum Jülich Gmb H State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Complex Shanghai Academy of Environmental Sciences Institute for Environmental and Climate Research Jinan University

Monoterpenes have been known to have a critical influence on air quality and climate change through their impact on the formation of fine particles.Here we present field evidence that monoterpene oxidations largely enhanced local ozone production in a regional site in eastern China.The observed monoterpene was most likely from biomass burning rather than biogenic emissions,as indicated by the high correlation with CO at night-time,and the observed ratio of these two species was consistent with previously determined values from biomass burning experiments.Fast monoterpene oxidations were determined experimentally based on direct radical measurements,leading to a daily ozone enhancement of 4-18 parts per billion by volume(ppb),which was 6%-16% of the total ozone production,depending on the speciation of monoterpenes.It demonstrates that the previously overlo oked anthropogenic monoterpenes make an important contribution to 03 production in eastern China.The role could possibly be important at similar locations across China and other parts of the world that are characterized by massive emissions,especially where there are high NOxlevels.Our results highlight that anthropogenic monoterpenes should be taken into account when proceeding with the coordinated mitigation of O3and particulate matter pollution.

关键词： anthropogenic emissions biomass burning monoterpenes ozone pollution radical chemistry

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Betaine affects muscle lipid metabolism via regulating the fatty acid uptake and oxidation in finishing pig

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Journal of Animal Science and Biotechnology 2018年第1期9卷 187-195页

作者： Sisi Li haichao wang Xinxia wang Yizhen wang Jie Feng Key Laboratory of Animal Nutrition & Feed Zhejiang Province College of Animal Science Zhejiang University

Background： Betaine affects fat metabolism in animals, but the specific mechanism is still not clear. The purpose of this study was to investigate possible mechanisms of betaine in altering lipid metabolism in muscle tissue in finishing pigs.Methods： A total of 120 crossbred gilts（Landrace × Yorkshire × Duroc） with an average initial body weight of 70.1 kg were randomly allotted to three dietary treatments. The treatments included a corn–soybean meal basal diet supplemented with 0, 1250 or 2500 mg/kg betaine. The feeding experiment lasted 42 d.Results： Betaine addition to the diet significantly increased the concentration of free fatty acids（FFA） in muscle（P 〈 0.05）. Furthermore, the levels of serum cholesterol and high-density lipoprotein cholesterol were decreased（P 〈 0.05） and total cholesterol content was increased in muscle（P 〈 0.05） of betaine fed pigs. Experiments on genes involved in fatty acid transport showed that betaine increased expression of lipoprotein lipase（LPL）, fatty acid translocase/cluster of differentiation（FAT/CD36）, fatty acid binding protein（FABP3） and fatty acid transport protein（FATP1）（P 〈 0.05）. The abundance of fatty acid transport protein and fatty acid binding protein were also increased by betaine（P 〈 0.05）. As for the key factors involved in fatty acid oxidation, although betaine supplementation didn＇t affect the level of carnitine and malonyl-CoA, betaine increased mR NA and protein abundance of carnitine palmitransferase-1（CPT1）and phosphorylated-AMPK（P 〈 0.05）.Conclusions： The results suggested that betaine may promoted muscle fatty acid uptake via up-regulating the genes related to fatty acid transporter including FAT/CD36, FATP1 and FABP3. On the other hand, betaine activated AMPK and up-regulated genes related to fatty acid oxidation including PPARα and CPT1. The underlying mechanism regulating fatty acid metabolism in pigs supplemented with betaine is associated with the up-regulation of genes involved in fatty acid transport and fatty acid oxidation.

关键词： Betaine Fatty acid intake Fatty acid oxidation Muscle Pig

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HF Communications: Past, Present, and Future

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China Communications 2018年第9期15卷 1-9页

作者： Jinlong wang Guoru Ding haichao wang College of Communications Engineering Army Engineering University of PLA National Mobile Communications Research Laboratory Southeast University

High frequency(HF) communication, commonly covering frequency range between 3 and 30 MHz, is an important wireless communication paradigm to offer over-thehorizon or even global communications with ranges up to thousands of kilometers via skywave propagation with ionospheric refraction. It has widespread applications in fields such as emergency communications in disaster areas, remote communications with aircrafts or ships and non-light-of-the-sight military operations. This tutorial article overviews the history of HF communication, demystifies the recent advances, and provides a preview of the next few years, which the authors believe will see fruitful outputs towards wideband, intelligent and integrated HF communications. Specifically, we first present brief preliminaries on the unique features of HF communications to facilitate general readers in the communication community. Then, we provide a historical review to show the technical evolution on the three generations of HF communication systems. Further, we highlight the key challenges and research directions. We hope that this article will stimulate more interests in addressing the technical challenges on the research and development of future HF radio communication systems.

关键词：无线通讯 HF 技术进化通讯系统频率范围应用程序紧急情况高频率

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