Hotspots and trends of risk factors in gastric cancer: A visualization and bibliometric analysis

BACKGROUND The lack of specific symptoms of gastric cancer(GC)causes great challenges in its early diagnosis.Thus it is essential to identify the risk factors for early diagnosis and treatment of GC and to improve the survival rates.AIM To assist physicians in identifying changes in the output of publications and research hotspots related to risk factors for GC,constructing a list of key risk factors,and providing a reference for early identification of patients at high risk for GC.METHODS Research articles on risk factors for GC were searched in the Web of Science core collection,and relevant information was extracted after screening.The literature was analyzed using Microsoft Excel 2019,CiteSpace V,and VOSviewer 1.6.18.RESULTS A total of 2514 papers from 72 countries and 2507 research institutions were retrieved.China(n=1061),National Cancer Center(n=138),and Shoichiro Tsugane(n=36)were the most productive country,institution,or author,respectively.The research hotspots in the study of risk factors for GC are summarized in four areas,namely:Helicobacter pylori(H.pylori)infection,single nucleotide polymorphism,bio-diagnostic markers,and GC risk prediction models.CONCLUSION In this study,we found that H.pylori infection is the most significant risk factor for GC;single-nucleotide polymorphism(SNP)is the most dominant genetic factor for GC;bio-diagnostic markers are the most promising diagnostic modality for GC.GC risk prediction models are the latest current research hotspot.We conclude that the most important risk factors for the development of GC are H.pylori infection,SNP,smoking,diet,and alcohol.

Global patterns of taxonomic and phylogenetic diversity of flowering plants: Biodiversity hotspots and coldspots

Species diversity of angiosperms(flowering plants) varies greatly among regions.Geographic patterns of variation in species diversity are shaped by the interplay of ecological and evolutionary processes.Here,using a comprehensive data set for regional angiosperm floras across the world,we show geographic patterns of taxonomic(species) diversity,phylogenetic diversity,phylogenetic dispersion,and phylogenetic deviation(i.e.,phylogenetic diversity after accounting for taxonomic diversity) across the world.Phylogenetic diversity is strongly and positively correlated with taxonomic diversity;as a result,geographic patterns of taxonomic and phylogenetic diversity across the world are highly similar.Areas with high taxonomic and phylogenetic diversity are located in tropical regions whereas areas with low taxonomic and phylogenetic diversity are located in temperate regions,particularly in Eurasia and North America,and in northern Africa.Similarly,phylogenetic dispersion is,in general,higher in tropical regions and lower in temperate regions.However,the geographic pattern of phylogenetic deviation differs substantially from those of taxonomic and phylogenetic diversity and phylogenetic dispersion.As a result,hotspots and coldspots of angiosperm diversity identified based on taxonomic and phylogenetic diversity and phylogenetic dispersion are incongruent with those identified based on phylogenetic deviations.Each of these metrics may be considered when selecting areas to be protected for their biodiversity.

Monitoring Hotspots Using Thermal Sensors on MODIS Aqua/Terra Satellite System: A Case Study of National Park Areas in Northern Thailand

This research presents the remote sensing data on hotspots in four national parks located in Chiang Mai province, Thailand: Sri Lanna National Park, Huai Nam Dang National Park, Doi Pahom Pok National Park, and Doi Inthanon National Park. To mitigate the devastating impacts of these wildfires, effective monitoring and management strategies are necessary. Remote sensing technology provides a promising approach for mapping burnt areas and understanding fire regimes at a regional scale. The primary focus of this research is to employ the MODIS Aqua/Terra satellite system for obtaining historical remote sensing data on hotspots. The advantages of remote sensing include accurate identification and mapping of burnt areas, regular monitoring, rapid data acquisition, and historical data analysis. The MODIS sensor, specifically designed for fire monitoring, offers enhanced fire detection and diagnosis, multiple channels for qualitative and quantitative analysis, and precision positioning capabilities. The research results presented in the analysis contribute to the understanding of fire incidents and hotspot occurrences within the four national parks studied. This paper suggests the optimization of early detection of forest and land fires through the utilization of Artificial Intelligence (AI), presenting it as a recommendation for future endeavors. The research emphasizes the significance of implementing efficient policies and management strategies to effectively tackle the challenges associated with fires in these ecologically significant areas.

Visual Analysis of Research Hotspots and Trends of Benefit Finding in China Based on Citespace

[Objectives]Based on the related literature of benefit finding in China National Knowledge Infrastructure(CNKI),this paper analyzes the research status,hot spots and trends in this field.[Methods]To search for the related literature on benefit finding in China National Knowledge Infrastructure(CNKI),and use Citespace software to visually analyze the number of papers,authors,institutions and keywords.[Results]A total of 204 related papers were obtained,and the annual number of published papers showed a gradual increasing trend.The authors of published papers were represented by Zhang Fenglan,Liu Zhunzhun and Zhang Ting,and the Nursing College of Anhui Medical University published the most papers.The research focus was on social support,coping method and other influencing factors,and qualitative research was the main research type.The key population was breast cancer,stroke patients and their caregivers,and the development trend focused on reliability and validity test and correlation analysis.[Conclusions]The field of benefit finding in China is in the initial exploration stage,and there is little cooperation and exchange between authors and institutions.In the future,academic exchanges and multidisciplinary assistance should be strengthened to promote the rapid development of this field.

Erosion hotspot identified along the sandy coast of Shanwei: characteristics and origin

Based on the measured beach profile data of Sanzhou Bay from 2015 to 2019,an erosion hotspot was identified along the Shanwei coastline of eastern Guangdong,where the maximum retreat distance of the shoreline exceeded 80 m and the erosion rate was more than 20 m/a.To determine the time at which the erosion hotspot started and the potential causes of its formation,this study used 63 Landsat satellite images from 1986 to 2019 to construct a time series of shoreline positions over the past 30 years by extracting their high-tide shorelines.Next,the M-K trend test method was introduced to evaluate the non-linear shoreline behavior based on the single-transect method.The results showed that the time of approximately 2013 marked the start of the erosion hotspot,the erosion hotspot was characterized by erosion rates of more than 2 m/a(a maximum rate of 31.6 m/a),and the affected shoreline more than 4.3 km from 2013 to 2019.Furthermore,this erosion hotspot was proved to be caused by artificial sand mining in the nearshore zone,which destroyed the original beach’s morphodynamic equilibrium.With the aid of storm events,soil cliffs composed of loose sediment on the backshore were sacrificed to achieve a new equilibrium,resulting in an extremely significant retreat parallel to the coast on the west side of the study area,which reflects the combined effect of human and natural processes.This study provides a concrete example of the rapid response of shorelines to artificial sand mining activities,and the associated finding is a stark warning about the cautious development and utilization of coastal zones and the strict regulation of human activities.

Detection and Mapping of Violent Crime Hotspots in Southwestern Nigeria

The increasing rate of insecurity in Nigeria, especially the southwest requires a paradigm shift from popular approach to crime hotspots detection. This study employed geospatial technologies to integrate spatio-temporal crime, social media and field observation data from the communities in all the six states in the southwest to develop crime hotspots that can serve as preliminary information to assist in allocating resources for crime control and prevention. Historical crime data from January 1972 to April, 2021 were compiled and updated with rigorous field survey in September, 2021. The field data were encoded, input to the SPSS 17 and analyzed using descriptive statistics and multivariate analysis. A total 936 crime locations data were geolocated and exported to ArcGIS 10.5 for spatial mapping using point map operation and further imported to e-Spatial web-based and QGIS for the generation of hotspot map using heatmap tool. The results revealed that armed robbery, assassination and cultism were more pronounced in Lagos and Ogun States. Similarly, high incidences of farmers/herdsmen conflicts are observed in Oyo and Osun States. Increasing incidences of kidnapping are common in all the south-western states but very prominent in Ondo, Lagos and Oyo States. Most of the violent crime incidents took place along the highways, with forests being their hideouts. Violent crimes are dominantly caused by high rate of unemployment while farmer/herdsmen conflicts were majorly triggered by the scarcity of grazing fields and destruction of arable crops. The conflicts have resulted in the increasing cases of rape and disruption of social group, intake of hard drugs, cult-related activities, low income and revenue generation, and displacement of farmers and infrastructural damages. The study advocates regular retraining and equipping of security agents, establishment of cattle ranch, and installation of sophisticated IP Camera at the crime hotspots to assist in real-time crime monitoring and management.

国外儿童正念研究热点与前沿的可视化分析

为了解正念在儿童群体中的研究热点和前沿动态,研究者以ISI Web of Science数据库中2007—2021年的1900篇文献为原始数据,应用CiteSpace知识图谱软件,绘制与儿童正念研究相关的知识图谱,挖掘国外儿童正念的发表文献时间分布、研究热点与研究前沿。研究结果发现:国外儿童正念研究发文量近五年呈明显上升趋势,研究热点涉及正念疗法及其效果、儿童心理问题与行为问题、正念干预使用率、正念教养等领域,研究前沿主要包括正念干预的科学性、儿童社会情绪能力培养以及师生关系等研究主题。

Predicting the Potential Invasion Hotspots of Chromolaena odorata under Current and Future Climate Change Scenarios in Heterogeneous Ecological Landscapes of Mizoram,India

Recent trends in globalization,human mobility surge and global trade aggravated the expansion of alien species introduction leading to invasion by alien plants compounded by climate change.The ability to predict the spread of invasive species within the context of climate change holds significance for accurately identifying vulnerable regions and formulating strategies to contain their wide proliferation and invasion.Anthropogenic activities and recent climate change scenarios increased the risk of Chromolaena odorata invasion and habitat expansion in Mizoram.To forecast its current distribution and habitat suitability amidst climatic alterations in Mizoram,a MaxEnt-driven habitat suitability model was deployed using the default parameters.The resultant model exhibited that the current spatial range of C.odorata occupies 15.37%of geographical areas deemed suitable for varying degrees of invasion.Projections for 2050 and 2070 anticipated an expansion of suitable habitats up to 34.37%of the geographical area of Mizoram,specifically under RCP 2.6 in 2070 in comparison with its present distribution.Currently,the distributional range of C.odorata in Mizoram spans from lower(450 m)to mid elevational ranges up to 1700 meters,with limited presence at higher altitudes.However,the habitat suitability model extrapolates that climate changes will elevate the invasion risk posed by C.odorata across Mizoram,particularly in the North-Western and Central regions.The projection of further territorial expansion and an upward shift in altitudinal range in the future underscores the urgency of instating robust management measures to pre-empt the impact of C.odorata invasion.This study recommends the imperative nature of effective C.odorata management,particularly during the initial stages of invasion.

江苏省4类主要秸秆和畜禽粪便空间分布及综合利用潜力研究

为明晰江苏省农业废弃物资源分布格局并进行利用潜力评估,推进农业废弃物资源化利用,助力农业全面绿色转型,本研究借助GIS构建数据批处理模型,测算各区县水稻、小麦、玉米和油菜4种作物的秸秆和猪、牛、羊、家禽4种畜禽的粪便产生量,及其在肥料化、能源化方面的利用潜力理论值,并结合热点分析结果为江苏省农业废弃物综合利用提供政策建议。结果表明:2020年江苏省4种主要作物秸秆可收集总量高达3972.00万t,以水稻和小麦秸秆为主,集中分布在江苏北部和中部。分析其肥料化利用潜力,理论上相当于1511.89万t有机碳、12.04万t N、1.59万t P、24.49万t K,能源化理论上相当于1617.52万t标准煤或6.5×10^(9)m^(3)沼气;江苏省4种主要畜禽粪便产生总量为4560.77万t,家禽粪便与猪粪最多,主要分布在东部边界和西北部地区。分析其肥料化利用潜力,理论计算相当于737.00万t有机碳、31.15万t N、29.86万t P和26.89万t K,能源化利用可折算成1036.95万t标准煤或4.9×10^(9)m^(3)沼气;99%置信度下,江苏省有10个秸秆产生热点县、7个畜禽粪便产生热点县和5个秸秆-畜禽粪便双热点县。秸秆产生热点县应根据主要秸秆种类选择直接还田、制作饲料、生产农副产品和食用菌等合适的利用方向。畜禽粪便产生热点县适于开展以粪污处理为核心的循环利用模式。秸秆-畜禽粪便双热点县则具有利用种养结合构建多层次、多元化、综合化利用格局的重要优势。此外,江苏省应根据资源聚集情况,分层、分类布设资源收集处理中心,并同步优化全省的收储运网络。

2023中国教育治理研究热点与未来前瞻

2023年,中国教育治理研究成果丰富、重点和特点突出,回应了中国教育的时代问题,体现了教育治理研究的学术特色和优势。通过系统梳理和分析教育治理研究文献,文章发现:2023年的教育治理研究密切关注党的二十大报告作出的重大战略部署,主要内容是基础教育治理、高等教育治理、教师教育治理、全球教育治理;形成了中国式现代化进程中的教育治理、以教育数字化开启教育现代化、生成式人工智能赋能教育治理、“双减”政策落地两周年省思、乡村振兴视域下的乡村教育治理等学术热点;聚焦教育治理概念厘定、教育治理学科建设、教育法体系化与法典化等研究前沿,深化了教育治理热点研究。从未来发展趋势来看,今后将进一步推进教育治理理论研究与学科体系建设,注重教育治理政策与立法研究,加强教育治理比较研究,深化教育治理实践研究,以深入推进教育治理体系与治理能力现代化。

基于CiteSpace的自体动静脉内瘘研究热点挖掘及分析

【目的】目的 分析自体动静脉内瘘(arteriovenous fistula,AVF)研究现状,挖掘研究热点及学科前沿。方法 以CiteSpace文献分析软件对Web of Science核心数据库中近20年发表的相关文献进行分析、归纳、总结。结果 共纳入相关文献1460篇,AVF主题发文量呈缓慢上升趋势;研究热点包括AVF围手术期管理、AVF失功病理生理机制、AVF狭窄的处理、AVF穿刺以及AVF并发症。研究前沿以AVF狭窄的血管内成形术相关的多中心合作为主。结论 维持性血液透析患者AVF领域的研究整体处于蓬勃发展阶段,血管通路方向的研究者们可拓宽研究思路,多维度积极探索,为AVF围手术期管理、日常维护等学科发展及临床实践提供高质量证据支持。

国外应急管理研究热点与演进--基于2001—2023年Web of Science数据库知识图谱分析

为探究国外应急管理领域的研究热点与演进,选取2001—2023年Web of Science数据库(WoS)收录的1724篇应急管理文献,基于CiteSpace文献计量软件从发文量趋势、机构、国家及作者合作网络、共被引文献、关键词共现及聚类特征进行可视化分析。研究结果表明:国外应急管理领域的年发文量呈现稳步增长的趋势,研究主题演进可分为3个阶段:(1)2001—2010年,应急预案与决策成为研究热点;(2)2011—2018年,疏散、社区脆弱性、社区韧性成为高突现强度关键词;(3)2019—2023年,智慧应急成为研究热点。随着大数据、人工智能等新型互联网技术在数字中国建设中的发展与应用,智慧应急将成为新时期应急管理内涵建设的重要方向之一。研究结果可为我国应急管理新理论与新技术发展提供参考。

基于CiteSpace护理经济效力研究热点及发展趋势的可视化分析

目的从国际视角探讨护理经济效力的研究热点及发展脉络,为重塑公众观念,改进对护理的战略投资,以增进护理学科的经济及社会效益提供参考。方法检索并分析PubMed建库至2024年3月16日收录的护理经济效力相关文献,应用CiteSpace进行分析,剖析护理经济效力研究的前沿热点及发展趋势。结果共纳入1630篇护理经济效力相关文献,年度发文量呈先缓慢后快速的增长趋势;发达国家间合作较多;机构合作网络相对分散;作者间合作密切;研究热点主要集中在生活质量、卫生经济、基础保健、经济评价,研究场所以养老院为核心。护理经济效力研究形成9个主题聚类,代表了国内公立医院高质量发展的9个热点。突变词图谱显示,护理经济效力研究呈现由基础服务、患者安全到成本效益演变的特征。结论护理经济效力领域的研究热点从传统的健康服务组织与管理逐步向老龄化、人文性方向发展,呈现出与护理学科发展历程一致的演变路径,智慧化是未来新方向,以机器学习等为手段通过护理经济效力促进人类健康进而驱动经济健康发展。

含孔洞炸药晶体HMX冲击响应的分子动力学模拟

动载荷下炸药晶体缺陷与热点形成的关联是当前含能材料领域的研究热点之一,理解热点形成机制及其对炸药起爆和感度的影响对于炸药安全性评估和研制安全弹药至关重要。本研究采用ReaxFF反应力场和分子动力学方法,对含圆柱形孔洞的炸药单晶奥克托金(HMX)在冲击载荷下的动态响应进行了研究,并探究了孔洞尺寸和双孔洞的影响。结果表明,冲击载荷下孔洞的塌缩过程分为3个阶段,即孔洞上游的塑性变形、上游原子向孔洞中心和下游运动形成流动原子、流动原子与下游碰撞。热点形成的主要机制是流动原子与下游碰撞使得动能转换为热能导致温度快速升高。热点的高温诱发了局部化学反应,HMX分子中N─NO2键断裂生成NO2是主要的初始反应机制。圆柱形孔洞的塌缩过程和热点形成机制与球形孔洞是相似的,但圆柱形孔洞的汇聚效应更弱、形成的流动原子速度更低,导致热点温度显著降低、化学反应更弱。此外,圆柱形孔洞在塌缩过程中在其周围形成了剪切带,这在球形孔洞中没有出现。随着孔洞尺寸的增大,流动原子的速度提高、剪切带变宽、热点温度升高且面积增大,进而引发了更剧烈的化学反应。对于沿冲击方向排布相距一个孔洞半径的双孔洞,孔洞塌缩过程与单孔洞是类似的,但由于冲击波在传过上游孔洞后压力有所降低,导致下游孔洞在塌缩过程中形成的流动原子速度更小、热点温度更低。本研究有助于深入理解晶体缺陷对炸药热点形成与起爆机理的作用,为宏观理论建模提供物理机制与规律认识。

基于科学知识图谱的劈裂注浆研究热点与发展态势分析

针对传统建筑科学分析方法对工程领域研究存在的局限性,引入科学知识图谱及大数据计量等人工智能方法,借助可视化软件Citespace,检索Web of Science(WOS)核心合集数据库,得到2007~2022年主题为劈裂注浆的文献709篇,对发文总量、学科归属、期刊分布、核心作者、区域合作、关键词和被引文献等方面做科学知识图谱分析。通过区域合作关系图谱的寻径,理清现阶段国际合作的格局,指出中国未来国际合作的主要任务。依据成果数量和突现时间,评析贡献较大的代表性作者。提取318个研究关键词,以发文频次和中心性为导向,筛选精炼了现阶段研究热点。从10个聚类的特性分组出发,展示了理论研究、应用实践和数值模拟的发展脉络,明确了研究的前沿方向。排列10条聚类发展时间线,精炼了注浆效率和封堵效率两条热门主线,同时提示了较难取得研究成果的线路。通过聚焦关键词的时区分布态势,总结热点演进的两个规律,并预测今后两年新热点与2017年研究成果之间的潜在关联。根据文献共被引关系发生的时间,对比4组年度切片的变化,评价了学科知识基础的发展脉络和未来走向。结果表明:科学知识图谱作为人工智能分析方法,能总结分析劈裂注浆近年来的研究热点,并可以预测劈裂注浆在未来阶段的学术研究发展态势。

高校大型仪器开放共享研究热点与趋势分析

为了更好地把握国内高校大型仪器开放共享的研究热点和发展趋势,对中国知网建库以来收录的该领域研究进行文献计量学分析。结果表明,关于大型仪器开放共享的文献多集中于实验类核心期刊,并形成了一定数量的核心作者,发文机构集中在“双一流”建设高校,国家级项目资助比重较大。关键词共现分析表明,基于“现状—问题—对策”范式的管理对策研究、共享信息服务平台的技术支撑体系研究和国内外大型仪器共享管理经验总结是当前的研究热点。随着研究前沿不断发展,持续深入开展管理体制机制建设、细化和完善评价考核体系、引入市场化机制和聚焦用户体验可能成为未来的研究重点。

中医外治法治疗痛风性关节炎研究文献可视化分析

目的 分析中医外治法治疗痛风性关节炎相关文献,了解该领域研究现状、研究热点和发展趋势,为该领域后续研究提供研究思路。方法 检索中国知识资源总库(CNKI)、中国学术期刊数据库(万方数据)、中文科技期刊数据库(VIP)2000年1月1日-2022年11月30日收录的中医外治法治疗痛风性关节炎研究文献,利用NoteExpress3.6.0软件对文献进行人工筛选,借助Excel2019绘制发文趋势图和期刊分布图;采用VOSviewer1.6.18软件绘制核心作者合作网络、机构合作密度视图和关键词共现图谱,使用CiteSpace6.1.R4软件绘制关键词聚类分析图、时间线图及关键词突现图谱,并对以上内容进行分析。结果 共纳入1 304篇文献,发文量总体呈增长态势;纳入文献涉及318本期刊、2 890位作者,发文量最多的是广州中医药大学;分析得出文献关键词1 181个,形成12个有意义的聚类,并展现出了湿热蕴结型、炎性因子、中医药疗法等20个突现词。结论 中医外治法治疗痛风性关节炎的研究热点主要集中于中药内服外敷、临床疗效观察及中药外敷、针刺、刺血疗法、电针、火针、针刀等中医外治法,备受关注的中医证型是湿热蕴结型。

基于CiteSpace的林木腐烂病研究现状与趋势分析

为全面系统了解林木腐烂病国内外研究现状和进展情况,检索Web of Science(WOS)核心集和中国知网(CNKI)1990—2022年收录的林木腐烂病相关研究文献,运用CiteSpace 5.8.R3软件对纳入文献的国家、机构、作者共现、关键词聚类及突现等数据进行可视化分析。经筛选,共纳入WOS文献621篇、CNKI文献1886篇。国际上林木腐烂病研究热度总体呈上升趋势,研究国家以中、美为主,研究机构以高校为主,国内机构和学者非常活跃,合作较多,国家之间合作不足。目前较活跃的高频关键词聚类为taxonomy(分类)、antifungal activity(抗真菌活性)、mycovirus(真菌病毒)和病虫害等。国际上林木腐烂病研究热点及趋势在维度上不断发展,聚焦bark(树皮)、purification(纯化)、lectin(凝集素)、diversity(多样性)等热点问题,国内研究集中于福美砷、木质部、树势、桥接等传统角度,并逐渐关注孢子角、发病规律、抑菌活性等主题的中国国情下的研究。

水肥一体研究的热点问题和可视化分析

水肥一体化近年来在农业施肥领域得到快速发展,是目前提高农作物肥效的重要途径。采用文献计量学方法,对水肥一体相关文献进行分析。利用中国CNKI数据库,选取2010-2023年的文献为研究对象,通过对中国知网核心数据库中216篇与“水肥一体”相关中文文献的文献数量、年代分布、期刊分布、发文机构分布、著者信息、研究内容及热点等进行客观、系统地分析,得出结果:自2010-2023年来,国内共发表水肥一体相关文章216篇,数据库内中国最早关于水肥一体方面的文献发表于2010年,发表的文章数量随着年份的增长呈波动式上升;就发表的论文、作者、发文机构等方面而言,有关“水肥一体”的论文主要发表在农业农林学等相关专业刊物上;水肥一体的发文机构是以中国的北京市、山东省、宁夏回族自治区的高等院校和科研院所等机构为重点,其具有雄厚的农业研究实力和较强的学术影响力;研究水肥一体这一领域的核心作者目前尚未形成稳定的群体且数量较少;从研究内容上看,目前中国的水肥一体技术研究重点集中在产量、物联网、控制系统以及滴灌等领域。结果可以客观地反映2010-2023年国内水肥一体相关课题的研究动态,为该领域的研究人员提供数据参考。

国内生物质气化研究热点、演进与趋势分析

为客观全面地分析我国生物质气化领域的发展脉络及研究动态,以近30年关于“生物质气化”的1722篇文献作为数据源,利用知识图谱软件对发文量、机构及关键词等进行文献计量与内容分析,解析该领域的前沿热点和发展趋势。研究表明:生物质气化发文量可分为初出萌芽期、蓬勃发展期和小幅下降期;我国生物质气化研究的热点集中在拓展生物质气化原料选择范围及优化气化技术、提高气化产物效率等方面,从重产率转向重社会效益。未来我国生物质气化的研究趋势为生物质原料外扩、气化反应机理、气化反应过程和气化产物高值化利用等方向。