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Local Climate Change Induced by Urbanization on a South China Sea Island

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Journal of Tropical Meteorology 2024年第1期30卷 11-19页

作者：郝宇李磊陈柏纬孙伟戴永久 School of Atmospheric Sciences Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Sun Yatsen UniversityZhuhaiGuangdong 519082 China Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary ZhuhaiGuangdong 519082 China Key Laboratory of Tropical Atmosphere-Ocean System Ministry of EducationSun Yat-sen UniversityZhuhaiGuangdong 519082 China Guangdong Provincial Marine Meteorology Science Data Center Guangzhou 510640 China Hong Kong Observatory KowloonHongkong 999077 China Meteorological Bureau of Sansha City SanshaHainan 573199 China

The South China Sea is a hotspot for regional climate research.Over the past 40 years,considerable improvement has been made in the development and utilization of the islands in the South China Sea,leading to a substantial change in the land-use of the islands.However,research on the impact of human development on the local climate of these islands is lacking.This study analyzed the characteristics of local climate changes on the islands in the South China Sea based on data from the Yongxing Island Observation Station and ERA5 re-analysis.Furthermore,the influence of urbanization on the local climate of the South China Sea islands was explored in this study.The findings revealed that the 10-year average temperature in Yongxing Island increased by approximately 1.11℃from 1961 to 2020,and the contribution of island development and urbanization to the local warming rate over 60 years was approximately 36.2%.The linear increasing trend of the annual hot days from 1961–2020 was approximately 14.84 days per decade.The diurnal temperature range exhibited an increasing trend of 0.05℃per decade,whereas the number of cold days decreased by 1.06days per decade.The rapid increase in construction on Yongxing Island from 2005 to 2021 led to a decrease in observed surface wind speed by 0.32 m s^(-1)per decade.Consequently,the number of days with strong winds decreased,whereas the number of days with weak winds increased.Additionally,relative humidity exhibited a rapid decline from 2001 to 2016 and then rebounded.The study also found substantial differences between the ERA5 re-analysis and observation data,particularly in wind speed and relative humidity,indicating that the use of re-analysis data for climate resource assessment and climate change evaluation on island areas may not be feasible.

关键词： local climate climate change Yongxing Island a South China Sea island climate change induced by urbanization

界面电子结构对核壳量子点/聚乙烯纳米复合绝缘电导与空间电荷特性的影响

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物理学报 2024年第12期73卷 11-24页

作者：王赫宇李忠磊杜伯学天津大学电气自动化与信息工程学院智能电网教育部重点实验室天津300072

为研究核壳量子点的界面电子结构对聚乙烯绝缘电导与空间电荷特性的影响,分别制备了CdSe@ZnS/LDPE,ZnSe@ZnS/LDPE两种核壳量子点纳米复合绝缘,研究了复合绝缘的直流电导和空间电荷的演变规律,并分析了核壳量子点的界面电子结构对电荷陷... 详细信息

为研究核壳量子点的界面电子结构对聚乙烯绝缘电导与空间电荷特性的影响,分别制备了CdSe@ZnS/LDPE,ZnSe@ZnS/LDPE两种核壳量子点纳米复合绝缘,研究了复合绝缘的直流电导和空间电荷的演变规律,并分析了核壳量子点的界面电子结构对电荷陷阱分布特性的影响机理.研究发现,相比于LDPE绝缘,ZnSe@ZnS/LDPE复合绝缘在高温强场条件下直流电导率可降低47.2%,空间电荷积累量降低了40.3%,且陷阱能级增大,表现出对载流子更强的捕获作用.基于密度泛函理论,计算了核壳量子点与聚乙烯绝缘的能带特征.结果表明,核壳纳米量子点的核层-壳层界面、壳层-绝缘界面的能带偏移导致导带底与价带顶发生突变,分别对电子和空穴具有限域作用,且限域效应随着量子点核层与壳层带隙差异增大而逐渐增强,从而限制高温强场下载流子迁移、抑制空间电荷积聚.

关键词：纳米复合绝缘核壳量子点空间电荷载流子迁移

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污泥-生活垃圾混合填埋体降解过程试验研究

人民长江 2024年第4期55卷 81-86页

作者：王佩李磊安徽省·水利部淮河水利委员会水利科学研究院安徽合肥230000 河海大学地球科学与工程学院江苏南京210098

污泥中含有大量的微生物和易降解有机质,向垃圾填埋场中混入污泥会对生活垃圾的生化降解过程产生一定的影响,从而影响填埋场的稳定化进程。针对这种问题,开展污泥-生活垃圾混合填埋体室内模拟生化降解试验研究,从渗滤液的pH、化学需氧量... 详细信息

污泥中含有大量的微生物和易降解有机质,向垃圾填埋场中混入污泥会对生活垃圾的生化降解过程产生一定的影响,从而影响填埋场的稳定化进程。针对这种问题,开展污泥-生活垃圾混合填埋体室内模拟生化降解试验研究,从渗滤液的pH、化学需氧量COD、氨氮浓度以及产气规律等角度研究混合填埋体降解过程变化规律。结果表明:生化降解初期,填埋体渗滤液的COD浓度和氨氮浓度逐渐增大,当生化降解进入稳定阶段后,填埋体渗滤液的COD浓度和氨氮浓度逐渐减小;有机质降解产生的有机酸等小分子有机质在渗滤液中积累导致COD浓度增加;随着污泥掺入量的增加,累计产气量逐渐增大,但是当污泥掺入量超过30%后,累计产气量逐渐减少;垃圾中掺入污泥可以促进垃圾的生化降解过程,但污泥的掺入量并不是越多越好,污泥掺入量超过30%时,反而会抑制生化降解过程。

关键词：污泥生活垃圾混合填埋体渗滤液产气规律最佳掺入量生化降解

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Java Language for Numerical Control Simulation System Research

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国际设备工程与管理:英文版 2023年第3期28卷 166-179页

作者： li lei li Hongmei ZHOU Huiqiang Zhengzhou Technical College Zhengzhou 450121China

Java language is widely used in a variety of development platforms to develop all kinds of application software for its simple and efficient.The programming language owning platform independent is adopted to solve the image flicker,sound loading and other issues by the threading technology,multimedia technology,graphics and point by point comparison techniques.Dynamic real⁃time process simulation is implemented and a two⁃dimensional network of CNC machining simulation system is developed while Java applet application is as a carrier.The simulation results show that the system has a friendly interface and fast calculation speed,and platform portability has a certain practicality and application value.

关键词： network numerical control(NC) Java language by⁃point comparison interpolation simulation

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发动机高速滚动轴承磨损故障信号特征识别

机械设计与制造 2024年第1期395卷 265-269页

作者：李深磊李鹏郑州商学院信息与机电工程学院河南巩义451200 桂林电子科技大学海洋工程学院广西北海536000

发动机高速滚动轴承在恶劣的工作环境下长时间使用,会导致其出现磨损故障,严重影响发动机的正常运行,且故障类型多样,每种故障类型都有其独特的特征,使得故障信号特征识别困难。为了有效解决这一问题,提出了一种发动机高速滚动轴承磨损... 详细信息

发动机高速滚动轴承在恶劣的工作环境下长时间使用,会导致其出现磨损故障,严重影响发动机的正常运行,且故障类型多样,每种故障类型都有其独特的特征,使得故障信号特征识别困难。为了有效解决这一问题,提出了一种发动机高速滚动轴承磨损故障信号特征识别方法。通过对发动机高速滚动轴承的振动信号进行EEMD分解和重建,获得其固有振动模态函数IMF,根据所得的IMF构建Hankel矩阵,获得拼接的奇异值样本特征矢量。通过划分样本空间和设置迭代阈值的方式,采用模糊聚类算法对故障样本聚类,计算出每个样本在不同聚类中的隶属度,以获得其贴近程度和故障特征。通过实验证明,所提算法能够较好的判别机械故障,准确性高,误报错报概率小,可确保设备的安全运行。

关键词： EEMD算法 FCM算法发动机高速滚动轴承轴承机械故障特征向量提取

某三甲医院科研人员科研诚信现状调查及对策探讨

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中国医学伦理学 2024年第5期37卷 526-534页

作者：邵晶晶李蕾首都医科大学附属北京同仁医院科技处北京100730 首都医科大学附属北京同仁医院眼科北京100730

目的通过调研科研人员科研诚信认知情况、对科研诚信的行为态度、科研诚信发生的原因等,找出关键影响因素和风险点,从而提出有针对性的科研诚信建设管理思路。方法采用网络调查问卷的方式对某三级甲等医院临床科研人员进行科研诚信政策... 详细信息

目的通过调研科研人员科研诚信认知情况、对科研诚信的行为态度、科研诚信发生的原因等,找出关键影响因素和风险点,从而提出有针对性的科研诚信建设管理思路。方法采用网络调查问卷的方式对某三级甲等医院临床科研人员进行科研诚信政策认知、科研失信行为做法态度及失信原因等调查。结果共回收问卷1385份,有效问卷1253份,男性246人,女性1007人,年龄在20~60岁之间,平均年龄(37.98±8.97)岁。科研诚信相关政策平均知晓率为39.44%。科研人员认为科研失信行为风险点前三位为论文投稿、委托第三方服务、科研经费使用的问题。根据不同调查对象涉及的科研工作不同,将违反科研行为规范态度调查内容根据基本资料中人员属性设定应答人群,共分为四组。科研诚信政策认知情况与第一组和第三组中的科研失信行为态度呈负相关关系;发表SCI论文情况、科研诚信政策认知情况与第二组科研失信行为态度均呈负相关关系;年龄、发表SCI论文情况与第四组中的科研失信行为态度有关,其中与发表SCI论文情况呈负相关,与年龄呈正相关。结论科研诚信学习培训及政策知晓率不高,应进一步提高科研诚信政策认知度;科研活动关键环节仍存在风险和问题,需加强科研活动全流程的诚信管理;应树立科研人员正确的科学价值观,完善科研评价体系,营造良好的科研环境。

关键词：科研人员科研诚信科研活动科研评价体系

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Establishment and validation of psoriasis evaluation models

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Fundamental Research 2022年第1期2卷 166-176页

作者： Yibo Hu ling Jiang li lei liping Luo Haoran Guo Ying Zhou Jinhua Huang Jing Chen Qinghai Zeng Department of Dermatology Third Xiangya Hospital Central South UniversityNo.138 Tongzipo RoadChangshaHunan 410013China

Psoriasis is a common inflammatory skin disease that seriously affects the patient's quality of life.The diagnosis of psoriasis is mainly based on clinical and pathological features,and the assessment depends on the psoriasis area and severity index(PASI).However,there are few reliable and accurate evaluation methods to assess lesion severity and therapeutic effects.This work identified 17 model genes from GEO datasets and established 6 psoriasis evaluation models by LASSO regression,linear regression,and random forest separately.Models were trained and evaluated in different GEO datasets.All 6 models accurately classified psoriatic lesions and non-lesional skin in training and testing data,and showed good AUC.In biologics-treated samples,the model scores were positively correlated with the severity of lesions and negatively correlated with treatment length.Thus,models have the potential to assess the therapeutic effects.In addition,the expression of model genes was examined in keratinocytes,skin of IMQ-induced psoriatic mice,and lesions of psoriasis patients.The RNA and protein levels of model genes increased in cytokine-stimulated keratinocytes and psoriatic lesions as expected.This work provides new methods to assess the lesion severity and therapeutic effects of biologies in psoriasis.

关键词： Psoriasis Accurate evaluation Biologies Evaluation model

基于事实核查平台的信息甄别学习资源调研与启示

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图书情报工作 2024年第12期68卷 56-69页

作者：黄崑李鸿赵晨李蕾北京师范大学政府管理学院北京100875

[目的/意义]通过调查事实核查平台的信息甄别学习资源,为国内信息甄别学习资源建设提供参考和借鉴。[方法/过程]以国际事实核查网络(IFCN)认证平台和国内代表性辟谣平台为数据来源,搜集整理信息甄别相关学习资源,采用内容分析法从形式... 详细信息

[目的/意义]通过调查事实核查平台的信息甄别学习资源,为国内信息甄别学习资源建设提供参考和借鉴。[方法/过程]以国际事实核查网络(IFCN)认证平台和国内代表性辟谣平台为数据来源,搜集整理信息甄别相关学习资源,采用内容分析法从形式特征和内容特征角度进行编码与分析。[结果/结论]信息甄别学习资源包含文本、视频、课程、游戏等多种类型,以文本和视频为主。信息甄别学习资源覆盖基本概念、方法技巧、识别工具、伦理规范及典型案例五大主题,以基本概念和方法技巧为主。平台面向青少年、老年人、大学生、新闻工作者、医护工作者和教育工作者等多元主体提供相关学习资源。最后,从辟谣平台和图书馆角度提出相关对策和建议。

关键词：信息甄别事实核查媒介素养信息素养学习资源事实核查平台

Staging of liver fibrosis in chronic hepatitis B patients with a composite predictive model:A comparative study

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World Journal of Gastroenterology 2010年第4期16卷 501-507页

作者： Wu, Sheng-Di Wang, Ji-Yao li, lei Fudan Univ Zhongshan Hosp Dept Internal Med Div Gastroenterol & Hepatol Shanghai 200032 Peoples R China

AIM:To evaluate the efficacy of 6 noninvasive liver fibrosis models and to identify the most valuable model for the prediction of liver fibrosis stage in chronic hepatitis B(CHB) patients.METHODS:Seventy-eight CHB patients were consecutively enrolled in this study.liver biopsy was performed and blood serum was obtained at admission.Histological diagnosis was made according to the METAVIR system.Significant fibrosis was defined as stage score ≥ 2,severe fibrosis as stage score ≥ 3.The diagnostic accuracy of 6 noninvasive liver fibrosis models,including serum aspartate aminotransferase(AST) to platelet ratio index(APRI),FIB-4,Forn's index,Fibrometer,Hepascore,and Shanghai liver Fibrosis Group's index(SLFG),was investigated.RESULTS:The APRI,FIB-4 and Forn's index under receiver operating characteristic curve(AUROC) for sig-nificant fibrosis were 0.71,0.75 and 0.79,respectively,with a diagnosis accuracy of 67%,77% and 80%,respectively,and 0.80,0.87 and 0.86,respectively,under the AUROC for severe fibrosis.The Hepascore,SLFG,and Fibrometer were 0.80,0.83 and 0.85,respectively under the AUROC for significant fibrosis(P < 0.01).The diagnosis accuracy of Hepascore and SLFG was 86% and 88%,respectively.The Hepascore,SLFG,and Fibrometer were 0.95,0.93,and 0.94,respectively,under the AUROC for severe fibrosis(P < 0.01).CONCLUSION:The models containing direct serum markers have a better diagnostic value than those not containing direct serum markers.

关键词： Chronic hepatitis B liver fibrosis Serum marker Noninvasive model Receiver operating curve