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Spatiotemporal variation and hotspots of climate change in the Yangtze River Watershed during 1958-2017

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Journal of Geographical Sciences 2022年第1期32卷 141-155页

作者： CHENG Guowei LIU Yong CHEN Yan GAO Wei Institute of International Rivers and Eco-security Yunnan Key Laboratory of International Rivers and Transboundary Eco-SecurityYunnan UniversityKunming 650091China College of Environmental Science and Engineering Key Laboratory of Water and Sediment Sciences(MOE)Peking UniversityBeijing 100871China State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation Chinese Academy for Environmental PlanningBeijing 100012China Institute of Environmental and Ecological Engineering Guangdong University of TechnologyGuangzhou 510006China

The Yangtze River Watershed in China is a climate change hotspot featuring strong spatial and temporal variability;hence, it poses a certain threat to social development. Identifying the characteristics of and regions vulnerable to climate change is significantly important for formulating adaptive countermeasures. However, with regard to the Yangtze River Watershed, there is currently a lack of research on these aspects from the perspective of natural and anthropogenic factors. To address this issue, in this study, based on the temperature and precipitation records from 717 meteorological stations, the RClim Dex and random forest models were used to assess the spatiotemporal characteristics of climate change and identify mainly the natural and anthropogenic factors influencing climate change hotspots in the Yangtze River Watershed for the period 1958-2017. The results indicated a significant increasing trend in temperature, a trend of wet and dry polarization in the annual precipitation, and that the number of temperature indices with significant variations was 2.8 times greater than that of precipitation indices. Significant differences were also noted in the responses of the climate change characteristics of the sub-basins to anthropogenic and natural factors;the delta plain of the Yangtze River estuary exhibited the most significant climate changes, where 88.89% of the extreme climate indices varied considerably. Furthermore, the characteristics that were similar among the identified hotpots, including human activities(higher Gross Domestic Product and construction land proportions) and natural factors(high altitudes and large proportions of grassland and water bodies), were positively correlated with the rapid climate warming.

关键词： Yangtze River Watershed climate change RClim Dex Random Forest anthropogenic and natural factors hotspots

Bibliometric evaluation of the status of Picea research and research hotspots:comparison of China to other countries

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Journal of Forestry Research 2020年第4期31卷 1103-1114页

作者： Guozhen Duan Yu'e Bai Dongmei Ye Tao Lin Peng Peng Min Liu Shulan Bai College of Forestry Inner Mongolia Agricultural University275 Xueyuan StreetHohhot 010019People’s Republic of China

Picea *** are important components of boreal and subalpine *** have a wide geographical range in the Northern Hemisphere,extending from the Eurasian continent to North *** this study,publications on Picea species from 2002 to 2016 were identified via the Web of Science(WoS)and the China National Knowledge Infrastructure(CNKI)databases,and subjected to relationship network visualization using CiteSpace *** study represents the first such analysis of Picea and provides a reference for bibliometrics in forest tree species *** results show that the total number of publications on Picea archived in WoS was20,958 and that the number of papers published annually has increased over time,peaking at 1725 in *** studies were mainly conducted in North America,Europe and Asia;among them,Canada published the most papers and showed the strongest betweenness centrality(0.11).Among research institutions,the Swedish University of Agricultural Sciences in Uppsala had the highest publication *** research contributions of the Chinese Academy of Sciences,the Chinese Academy of Forestry,and Beijing Forestry University have improved rapidly in recent years,greatly enhancing the international impact of Chinese research in this *** research contents were grouped into five categories:forest ecosystems,pest resistance,extraction and functional analyses of active ingredients from various plant organs,nursery and afforestation techniques,and timber quality *** China,the number of papers from the CNKI database was4532,increasing at an even *** research topics on Picea included forest ecosystems,seedling and afforestation techniques,basic studies on individual species and populations,and pests and *** and outside China,hotspots in Picea research included the relationships between Picea and environmental factors,and the genomic sequences of Picea.

关键词： Picea Bibliometrics hotspots Web of science Chinese National Knowledge Infrastructure

Experimental Evaluation of Individual hotspots of a Multicore Microprocessor Using Pulsating Heat Sources

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Frontiers in Heat and Mass Transfer 2023年第1期21卷 427-442页

作者： Rodrigo Vidonscky Pinto Flávio Augusto Sanzovo Fiorelli Department of Mechanical Engineering University Centre of United Metropolitan FacultiesSao PauloBrazil Department of Mechanical Engineering University of Sao PauloSao PauloBrazil

The present work provides an experimental and numerical procedure to obtain the geometrical position of the hotspots of a microprocessor using the thermal images obtained from the transient thermal response of this processor subject to pulsating stress *** is performed by the solution of the steady inverse heat transfer problem using these thermal images,resulting in qualitative heat source distributions;these are analyzed using the mean heat source gradients to identify the elements that can be considered *** procedure identified that the processor INTEL Core 2 Quad Q8400S contains one hotspot located in the center of its left die and four hotspots located near the lower left corner of its right die,which is consistent with the thermal response obtained for both the stress test applied to each core of this processor and the stress test applied to all of its cores.

关键词： Inverse heat transfer hotspots thermal imaging

Research status and hotspots in transjugular intrahepatic portosystemic shunts based on CiteSpace bibliometric analysis

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World Journal of Gastrointestinal Surgery 2024年第9期16卷 2996-3007页

作者： Zeng-Long Que Ming-Song Wu Shu-Jie Lai Yu-Qin He Yin-Bin Zhou Shun-Ping Gui Liang-Zhi Wen Department of Gastroenterology Daping HospitalArmy Medical University(Third Military Medical University)Chongqing 400042China Department of Infectious Diseases The 960 Hospital of PLAJinan 250031Shandong ProvinceChina Department of Obstetrics The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400042China

BACKGROUND The transjugular intrahepatic portosystemic shunt(TIPS)is an important technique for treating complications related to portal hypertension in patients with cirrhosis,and the number of publications in the TIPS field continues to *** To facilitate an understanding of the research status and hotspots in the field of TIPS using CiteSpace bibliometric *** CiteSpace is a software that depicts the strength of relationships through graphics and connections with diverse functionalities and can be used to analyze the status and hotspots of areas of *** on TIPS in the Web of Science Core Collection were retrieved,and CiteSpace software was used to visualize and analyze the number of publications,journals,countries,institutions,authors,keywords,and *** A total of 985 relevant documents were included in the *** January 2013 to December 2022,the number of publications increased *** journal,institution,and author with the greatest number of publications in the field of TIPS are the Journal of Vascular and Interventional Radiology,the University of Bonn,and Jonel Trebicka,*** main keywords used in this field are“transjugular intrahepatic portosystemic shunt”,“portal hypertension”,“cirrhosis”,“management”,“stent”,“hepatic encephalopathy”,“refractory ascite”,“survival”,“risk”,and“variceal bleeding”.The greatest obstacle to TIPS placement is currently the occurrence of hepatic *** research hotspots are the mechanism,risk factors,management,and control of hepatic *** This bibliometric analysis reported the research status and hotspots of *** on postoperative hepatic encephalopathy is the research hotspot in this field.

关键词： Liver cirrhosis Transjugular intrahepatic portosystemic shunt CiteSpace Visualization hotspots

Research hotspots and trends in transcranial magnetic stimulation for cognitive impairment:A bibliometric analysis from 2014 to 2023

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World Journal of Psychiatry 2024年第10期14卷 1592-1604页

作者： Qi Zhang Peng-Peng Zhu Lun Yang Ai-Song Guo Department of Rehabilitation Medicine Center Affiliated Hospital of Nantong UniversityNantong 226001Jiangsu ProvinceChina Department of Nursing and Rehabilitation Nursing and Rehabilitation School of Nantong UniversityNantong 226001Jiangsu ProvinceChina Department of Education and Training Affiliated Hospital of Nantong UniversityNantong 226001Jiangsu ProvinceChina Department of Education and Training Medical School of Nantong UniversityNantong 226001Jiangsu ProvinceChina

BACKGROUND Cognitive impairment,which manifests as a limited deterioration of specific functions associated with a particular disease,can lead to a general deterioration of the patient’s standard of *** magnetic stimulation,a noninvasive neuromodulation technique,is frequently employed to treat cognitive impairment in neuropsychiatric *** To analyzed the state of international research on neuromodulation methods for treating cognitive impairment between 2014 and 2023,with the aim of exploring the state of research worldwide and the most recent developments in this particular *** Articles and reviews pertaining to neuromodulation methods for cognitive impairment were examined using the web of science database between January 2014 and December ***,nations,organizations,writers,journals,citations,and keywords data from the identified studies were systematically analyzed using the CiteSpace 6.3.R1 *** A total of 2371 documents with 11750 authors and 9461 institutions,with some cooccurrences,were *** quantity of yearly publications is showing an increasing *** United States and China have emerged as important *** the institutes,Harvard University had the highest number of publications,while Rossi S an author who is frequently ***,the primary keywords included human motor cortex,placebo-controlled trials,and serotonin reuptake ***,the emphasis gradually moved to substance use disorders,supplementary motor areas,neural mechanisms,and *** The use of neuromodulation techniques to treat cognitive impairment has drawn interest from academics all around the *** study revealed hotspots and new trends in the research of transcranial magnetic stimulation as a cognitive impairment rehabilitation *** findings are hold significant potential to guide further research and thus promote transcranial magnetic stimulation as a treatment

关键词： Transcranial magnetic stimulation Cognitive impairment Bibliometric analysis hotspots Research trends

The history, hotspots, and trends of electrocardiogram

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Journal of Geriatric Cardiology 2015年第4期12卷 448-456页

作者： Xiang-Lin YANG Guo-Zhen LIU Yun-Hai TONG Hong YAN Zhi XU Qi CHEN Xiang LIU Hong-Hao ZHANG Hong-Bo WANG Shao-Hua TAN Key Laboratory of Machine Perception (Ministry of Education) School of Electronics Engineering and Computer Science Peking University Beijing China State Key Laboratory of Space Medicine Fundamentals and Application China Astronaut Research and Training Center Beijing China Institute for Medical Humanities Peking University Health Science Center Beijing China Department of Geriatric Cardiology Chinese PLA General Hospital Beijing China PKU Healthcare IT Co. Ltd. Beijing China

The electrocardiogram （ECG） has broad applications in clinical diagnosis and prognosis of cardiovascular disease. Many researchers have contributed to its progressive development. To commemorate those pioneers, and to better study and promote the use of ECG, we reviewed and present here a systematic introduction about the history, hotspots, and trends of ECG. In the historical part, information including the invention, improvement, and extensive applications of ECG, such as in long QT syndrome （LQTS）, angina, and myocardial infarction （MI）, are chronologi- cally presented. New technologies and applications from the 1990s are also introduced. In the second part, we use the bibliometric analysis me- thod to analyze the hotspots in the field of ECG-related research. By using total citations and year-specific total citations as our main criteria, four key hotspots in ECG-related research were identified from 11 articles, including atrial fibrillation, LQTS, angina and MI, and heart rate variability. Recent studies in those four areas are also reported. In the final part, we discuss the future trends concerning ECG-related research. The authors believe that improvement of the ECG instrumentation, big data mining for ECG, and the accuracy of diagnosis and application will be areas of continuous concern.

关键词： Electrocardiogram History hotspots Review Trends

Genomic Tools for the Impact Assessment of 'hotspots' for Early Warning of MDR Threats

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Biomedical and Environmental Sciences 2016年第9期29卷 656-674页

作者： Nishant A Dafale Hemant J Purohit Environmental Genomic Division CSIR-National Environmental Engineering Research Institute

INTRODUCTION Antimicrobial resistance （AMR） has been a low-priority area of research in most developing countries even though it has much significant therapeutic value. The management of serious infections should include not only the treatment of patients but also the measures to ensure that microorganisms do not spread through hospital premises. Controlling the transfer of organisms among staff, patients, and the environment is important. Research related to antimicrobial use and resistance, regional variation, and intervention policies.

关键词： MDR gene Genomic Tools for the Impact Assessment of for Early Warning of MDR Threats hotspots

Spatio-temporal co-occurrence of hotspots of tuberculosis, poverty and air pollution in Lima, Peru

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Infectious Diseases of Poverty 2020年第2期9卷 84-89页

作者： Gabriel Carrasco-Escobar Alvaro Schwalb Kelly Tello-Lizarraga Percy Vega-Guerovich Cesar Ugarte-Gil Health Innovation Lab Instituto de Medicina Tropical Alexander von HumboldtUniversidad Peruana Cayetano HerediaLimaPeru Division of Infectious Diseases Department of MedicineUniversity of California San DiegoLa JollaCAUSA Instituto de Medicina Tropical Alexander von Humboldt Universidad Peruana Cayetano HerediaLimaPeru School of Public Health and Administration Universidad Peruana Cayetano HerediaLimaPeru School of Economics and Finance Universidad del PacificoLimaPeru School of Medicine Universidad Peruana Cayetano HerediaLimaPeru TB Centre London School of Hygiene and Tropical MedicineLondonUK

Growing evidence suggests pollution and other environmental factors have a role in the development of tuberculosis(TB),however,such studies have never been conducted in *** the association between air pollution and specific geographic areas,our objective was to determine the spatial distribution and clustering of TB incident cases in Lima and their co-occurrence with clusters of fine particulate matter(PM2.5)and *** found co-occurrences of clusters of elevated concentrations of air pollutants such as PM2.5,high poverty indexes,and high TB incidence in *** findings suggest an interplay of socio-economic and environmental in driving TB incidence.

关键词： Tuberculosis hotspots Air pollution

Long-Term Fate of Agent Orange and Dioxin TCDD Contaminated Soils and Sediments in Vietnam hotspots

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Open Journal of Soil Science 2019年第1期9卷 1-34页

作者： Kenneth Ray Olson Lois Wright Morton Department of NRES College of Agricultural Consumer and Environmental Sciences University of Illinois Urbana IL USA Department of Sociology College of Agriculture and Life Sciences Iowa State University Ames IA USA

The soils, tropical climate, and network of canals and rivers of southern Vietnam have created one of the most diverse tropical jungles and intensely cultivated landscapes of Southeast Asia. This paradise has a long history of numerous wars, foreign occupations, and most recently the Second Indochina War (aka the Vietnam War 1965-1972) which defoliated rain forests and ancient wetland mangroves and left behind contaminated soil and sediment hotspots. During this war, the United States (US) military sprayed 80 million liters of Agent Orange contaminated with the dioxin TCDD in a guerrilla war against communist insurgents. Agent Orange was a synthetic plant growth regulator comprised of equal amounts of two herbicides 2,4-dichloro phenoxyacetic acid C8H6Cl2O3 (2,4-D) and 2,4,5-trichlorophenoxyacetic acid C8H5Cl3O3 (2,4,5-T). TCDD, the dioxin, 2,3,7,8-tetrachlorodibenzodioxin (C12H4Cl4O2) was an unintended byproduct of the accelerated combustion process used in the manufacture of herbicides containing 2,4,5-T. Agent Orange has frequently been blamed for soil and sediment contamination and long-term human health problems;however, the true source of harm is the dioxin TCDD. Agent Orange has a short half-life of days and weeks after application to vegetation, and has not been found to persist, after 50 years, in the water or soils of southern Vietnam. However, the half-life of dioxin TCDD depends on where it is deposited and varies from 1 to 3 years on soil surfaces that have been fully exposed to sunlight, to as long as 20 to 50 years or more when buried in tropical subsoils, and more than 100 years in river and sea sediments. Dioxin TCDD was heavily concentrated in the US Air Force bases in Vietnam where the herbicides were stored, loaded on planes and helicopters for aerial spraying, and used extensively around military base perimeter fences as a security measure to prevent surprise attacks. Bien Hoa Air Force base, 40 km northeast of Ho Chi Minh City, continues to be

关键词： Soils of Vietnam Agent Orange Dioxin TCDD Herbicides Soil Contaminant Sediment Contaminant Half-Life hotspots Operation Ranch Hand US Airbases in Vietnam Vietnam War Cu Chi Soil Tunnels Guerilla Warfare Incineration