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Spatial and temporal variation of water clarity in typical reservoirs in the Beijing-Tianjin-Hebei region observed by GF 1-WFV satellite data

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Journal of Oceanology and Limnology 2024年第4期42卷 1048-1060页

作者： chang cao Junsheng LI Xiaodong JIA Shenglei WANG Bo WAN Liaoning Earthquake Agency Shenyang 11000China Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100094China International Research Center of Big Data for Sustainable Development Goals Beijing 100094China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

Rapidly monitoring regional water quality and the changing trend is of great practical and scientific significance,especially for the Beijing-Tianjin-Hebei(BTH)region of China where water resources are relatively scarce and inland water bodies are generally *** remote sensing data of the GF 1 satellite launched in 2013 have characteristics of high spatial and temporal resolution,which can be used for the dynamic monitoring of the water environment in small lakes and ***,the water quality remote sensing monitoring model based on the GF 1 satellite data for lakes and reservoirs in BTH is still lacking because of the considerable differences in the optical characteristics of the lakes and *** this paper,the typical reservoirs in BTH-Guanting Reservoir,Yuqiao Reservoir,Panjiakou Reservoir,and Daheiting Reservoir are taken as the study *** the atmospheric correction of GF 1-WFV,the relative radiation normalized atmospheric correction was adopted after comparing it with other methods,such as 6 S and *** the water clarity retrieval,a water color hue angle based model was proposed and outperformed other available published models,with the R 2 of 0.74 and MRE of 31.7%.The clarity products of the four typical reservoirs in the BTH region in 2013-2019 were produced using the GF 1-WFV *** on the products,temporal and spatial changes in clarity were analyzed,and the main influencing factors for each water body were *** was found that the clarity of Guanting,Daheiting,and Panjiakou reservoirs showed an upward trend during this period,while that of Yuqiao Reservoir showed a downward *** the influencing factors,the water level of the water bodies can be an important factor related to the water clarity changes in this region.

关键词： GF 1 satellite atmospheric correction clarity Beijing-Tianjin-Hebei spatial and temporal change analysis

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Factors Influencing the Spatial Variability of Air Temperature Urban Heat Island Intensity in Chinese Cities

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Advances in Atmospheric Sciences 2024年第5期41卷 817-829页

作者： Heng LYU Wei WANG Keer ZHANG chang cao Wei XIAO Xuhui LEE Key Laboratory of Meteorological Disaster Ministry of Education(KLME)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Key Laboratory of Ecosystem Carbon Source and SinkChina Meteorological Administration(ECSS-CMA)/Jiangsu Key Laboratory of Agricultural MeteorologyNanjing University of Information Science&TechnologyNanjing 210044China Key Laboratory of Urban Meteorology China Meteorological AdministrationBeijing 100089China School of the Environment Yale UniversityNew HavenCT 06511USA

Few studies have investigated the spatial patterns of the air temperature urban heat island(AUHI)and its controlling *** this study,the data generated by an urban climate model were used to investigate the spatial variations of the AUHI across China and the underlying climate and ecological drivers.A total of 355 urban clusters were *** performed an attribution analysis of the AUHI to elucidate the mechanisms underlying its *** results show that the midday AUHI is negatively correlated with climate wetness(humid:0.34 K;semi-humid:0.50 K;semi-arid:0.73 K).The annual mean midnight AUHI does not show discernible spatial patterns,but is generally stronger than the midday *** urban–rural difference in convection efficiency is the largest contributor to the midday AUHI in the humid(0.32±0.09 K)and the semi-arid(0.36±0.11 K)climate *** release of anthropogenic heat from urban land is the dominant contributor to the midnight AUHI in all three climate *** rural vegetation density is the most important driver of the daytime and nighttime AUHI spatial variations.A spatial covariance analysis revealed that this vegetation influence is manifested mainly through its regulation of heat storage in rural land.

关键词： air temperature urban heat island spatial variations biophysical drivers Chinese cities climate model

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Efficacy and safety of perioperative therapy for locally resectable gastric cancer:A network meta-analysis of randomized clinical trials

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World Journal of Gastrointestinal Oncology 2024年第3期16卷 1046-1058页

作者： Zi-Yu Kuang Qian-Hui Sun Lu-chang cao Xin-Yi Ma Jia-Xi Wang Ke-Xin Liu Jie Li Graduate College Beijing University of Traditional Chinese MedicineBeijing 100029China Oncology Department Guang’anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China

BACKGROUND Gastric cancer(GC)is the fifth most commonly diagnosed malignancy worldwide,with over 1 million new cases per year,and the third leading cause of cancer-related *** To determine the optimal perioperative treatment regimen for patients with locally resectable *** A comprehensive literature search was conducted,focusing on phase II/III randomized controlled trials(RCTs)assessing perioperative chemotherapy and chemoradiotherapy in treating locally resectable *** R0 resection rate,overall survival(OS),disease-free survival(DFS),and incidence of grade 3 or higher nonsurgical severe adverse events(SAEs)associated with various perioperative regimens were analyzed.A Bayesian network meta-analysis was performed to compare treatment regimens and rank their *** Thirty RCTs involving 8346 patients were included in this *** XELOX plus neoadjuvant radiotherapy and neoadjuvant CF were found to significantly improve the R0 resection rate compared with surgery alone,and the former had the highest probability of being the most effective option in this *** plus adjuvant FLOT was associated with the highest probability of being the best regimen for improving *** to limited data,no definitive ranking could be determined for *** nonsurgical SAEs,FLO has emerged as the safest treatment *** This study provides valuable insights for clinicians when selecting perioperative treatment regimens for patients with locally resectable *** studies are required to validate these findings.

关键词： Gastric cancer Perioperative treatment Network meta-analysis Efficacy and safety

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Comparative studies on Fenton-like reactions catalyzed by Fe_(3)O_(4) loaded inside and outside halloysite nanotubes for the removal of organic pollutants

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Frontiers of Materials Science 2024年第1期18卷 15-28页

作者： Yang Li Jia-Qi Zhou Huan-Yan Xu Li-Min Dong Mao-chang cao Lian-Wei Shan Li-Guo Jin Xiu-Lan He Shu-Yan Qi Heilongjiang Provincial Key Laboratory of CO_(2) Resource Utilization and Energy Catalytic Materials School of Materials Science and Chemical EngineeringHarbin University of Science and TechnologyHarbin 150040China

In this work,Fe_(3)O_(4) nanoparticles(NPs)loaded inside and outside halloysite nanotubes(HNTs)were prepared and developed as the heterogeneous Fenton-like catalysts for the removal of representative organic *** results indicated that the samples with Fe_(3)O_(4) NPs loaded outside the HNTs lumen(Fe_(3)O_(4)/HNTs)and inside the HNTs lumen(Fe_(3)O_(4)@HNTs)were successfully *** samples had typical magnetic hysteresis loops,while Fe_(3)O_(4)@HNTs exhibited higher magnetization *** comparative experiments showed that Fe_(3)O_(4)@HNTs had better Fenton-like catalytic ability than that of Fe_(3)O_(4)/HNTs in the degradation of various organic *** Rhodamine B(RhB)as an example,the adsorption thermodynamics and kinetics of RhB onto Fe_(3)O_(4)/HNTs and Fe_(3)O_(4)@HNTs were also *** comparative results demonstrated that the adsorption ability of Fe_(3)O_(4)/HNTs was better than that of Fe_(3)O_(4)@***,the dissolved concentration of Fe^(2+)and production amount of hydroxyl radical(·OH)in the Fe_(3)O_(4)@HNTs-H_(2)O_(2) system were significantly higher than those in the Fe_(3)O_(4)/HNTs-H_(2)O_(2) *** on aforementioned comparison,the nano-confinement effect in the Fe_(3)O_(4)@HNTs-H_(2)O_(2) system was *** work provides meaningful guidance for the cheap and convenient design of nanoreactors for Fenton-like applications.

关键词： Fe_(3)O_(4) halloysite nanotube adsorption Fenton-like reaction mechanism

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政府采购与“专精特新”中小企业创新——基于产业链供应链现代化视角

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数量经济技术经济研究 2024年第7期41卷 113-133页

作者：武威曹畅王馨竹首都经济贸易大学财政税务学院

立足产业链供应链现代化发展需求,利用政府采购来促进“专精特新”中小企业创新具有显著的需求侧政策功能优势。本文以2015~2021年度国家认定的“专精特新”中小企业作为研究对象,对政府采购支持“专精特新”中小企业创新的政策效果进... 详细信息

立足产业链供应链现代化发展需求,利用政府采购来促进“专精特新”中小企业创新具有显著的需求侧政策功能优势。本文以2015~2021年度国家认定的“专精特新”中小企业作为研究对象,对政府采购支持“专精特新”中小企业创新的政策效果进行检验。研究发现:政府采购可以显著促进“专精特新”中小企业创新,激励效果在实质性创新与策略性创新中均有体现,政策作用机制主要表现为提升扩张发展效率及降低违规经营风险。聚焦直接的产业链供应链互动关系特征影响,供需互动周期越长、供需关系稳定性越强、供需活动透明度越高,则政府采购对“专精特新”中小企业创新的政策支持效果越突出。考虑间接的产业链供应链政策传导效果,政府采购对“专精特新”中小企业的上游供应商及下游客户的创新水平都产生了显著的溢出性促进效果,但产业链供应链政策支持及传导影响主要在本地政府采购中得到体现。挖掘政策制约因素,财政透明度可以有效改善政府采购对“专精特新”中小企业的实质性创新激励效果,且金融科技政策与政府采购创新政策支持整体上存在显著替代关系。应逐步完善政府采购支持“专精特新”中小企业创新发展的制度要求,持续优化区域及营商发展环境,建立健全有助于产业链供应链现代化发展的政府采购政策体系。

关键词：政府采购 “专精特新”中小企业创新产业链供应链

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中华优秀传统文化融入高校师德研究述评--基于CiteSpace文献计量分析

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长江师范学院学报 2024年第5期40卷 97-106页

作者：曹长雷徐少明魏星山东师范大学教育学部山东济南250014 长江师范学院教师工作部重庆408100 淮南师范学院高教研究所安徽淮南232038 山西工商学院教务处山西太原030001

基于2000-2023年中国知网学术文献,运用CiteSpace文献计量分析软件,开展关键词共词分析、聚类分析和突现分析,获取中华优秀传统文化融入高校师德研究的热点、演变进程和研究展望。研究结果显示:中华优秀传统文化融入高校师德研究关键词... 详细信息

基于2000-2023年中国知网学术文献,运用CiteSpace文献计量分析软件,开展关键词共词分析、聚类分析和突现分析,获取中华优秀传统文化融入高校师德研究的热点、演变进程和研究展望。研究结果显示:中华优秀传统文化融入高校师德研究关键词聚类效果较好,形成8个研究聚类;15个研究主题成为研究热点;研究历史经历三次变迁,包括早期探索阶段(2000-2011年)、波动提升阶段(2012-2017年)和平稳发展阶段(2018年至今),各阶段发展特征不同,整体上形成在波动中平稳向上的发展轨迹;未来研究重点关注在中华优秀传统文化内涵价值的持续挖掘和融入高校师德实施路径等方面。

关键词：中华优秀传统文化高校师德计量分析

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复材零件成型工装快速设计方法研究

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现代制造技术与装备 2024年第8期60卷 40-42页

作者：曹畅武杰仵向龙中航西安飞机工业集团股份有限公司西安710089

随着复合材料在飞机零部件中的广泛应用,提高复材零件成型工装设计效率成为保证飞机研制阶段产品按节点交付的关键手段。根据薄壁框架类复材成型工装的几何特征,总结出一种针对此类工装的通用建模方法,并在此基础上开发出快速设计软件,... 详细信息

随着复合材料在飞机零部件中的广泛应用,提高复材零件成型工装设计效率成为保证飞机研制阶段产品按节点交付的关键手段。根据薄壁框架类复材成型工装的几何特征,总结出一种针对此类工装的通用建模方法,并在此基础上开发出快速设计软件,能够实现工装的自动化设计,大幅提升效率。

关键词：复合材料工装快速设计

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Combinatorial pooled sequencing： experiment design and decoding

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Frontiers of Electrical and Electronic Engineering in China 2016年第1期4卷 36-46页

作者： chang-chang cao Xiao Sun State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Nanjing210096 China

Owing to rapid advances in the next-generation sequencing technology, the cost of DNA sequencing has been reduced by over several orders of magnitude. However, genomic sequencing of individuals at the population scale is still restricted to a few model species due to the huge challenge of constructing libraries for thousands of samples. Meanwhile, pooled sequencing provides a cost-effective alternative to sequencing individuals separately, which could vastly reduce the time and cost for DNA library preparation. Technological improvements, together with the broad range of biological research questions that require large sample sizes, mean that pooled sequencing will continue to complement the sequencing of individual genomes and become increasingly important in the foreseeable future. However, simply mixing samples together for sequencing makes it impossible to identify reads that belongs to each sample. Barcoding technology could help to solve this problem, nonetheless, currently, barcoding every sample is costly especially for large-scale samples. An alternative to barcoding is combinatorial pooled sequencing which employs pooling pattern rather than short DNA barcodes to encode each sample. In combinatorial pooled sequencing, samples are mixed into few pools according to a carefully designed pooling strategy which allows the sequencing data to be decoded to identify the reads that belongs to the sample that are unique or rare in the population. In this review, we mainly survey the experiment design and decoding procedure for the combinatorial pooled sequencing applied in rare variant and rare haplotype carriers screening, complex genome assembling and single individual haplotyping.

关键词： combinatorial pooled sequencing experiment design decoding

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数字经济时代企业管理的创新策略探究

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汉江师范学院学报 2024年第3期44卷 28-33页

作者：曹长芳陈永强安徽信息工程学院管理工程学院安徽芜湖241000

基于数字经济探讨企业的创新管理,即现代企业适应信息环境变化的管理模式转型.换言之,数字经济时代下的创新管理,考验的是企业的“适应性管理”能力.对此,以“跨体系数字化转型”为理论支撑,以特定企业的适应性管理转型实例为视角,如从... 详细信息

基于数字经济探讨企业的创新管理,即现代企业适应信息环境变化的管理模式转型.换言之,数字经济时代下的创新管理,考验的是企业的“适应性管理”能力.对此,以“跨体系数字化转型”为理论支撑,以特定企业的适应性管理转型实例为视角,如从KPI到OKR的转型,是研究企业管理模式创新的必要路径.其中,企业文化、组织结构、技术平台是企业创新管理或适应性管理的主要转型环节,如文化的创新性、组织的内驱性、平台的协同性等,最终构建起适应数字经济的适应性管理模式.

关键词：数字经济企业管理适应性管理企业转型

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IPv6+技术的安全风险与安全机制

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邮电设计技术 2024年第4期 32-38页

作者：佟恬赵菁庞冉曹畅中国联通研究院北京100048

IPv6/IPv6+适用于更多的场景、更多样的用户需求以及更复杂的安全环境,在全面推进IPv6商用部署和IPv6+创新研究的过程中,网络安全问题也被更加重视。然而IPv6+新技术尚在研究和试点中,其安全威胁还未充分暴露,需要结合国内外最新标准研... 详细信息

IPv6/IPv6+适用于更多的场景、更多样的用户需求以及更复杂的安全环境,在全面推进IPv6商用部署和IPv6+创新研究的过程中,网络安全问题也被更加重视。然而IPv6+新技术尚在研究和试点中,其安全威胁还未充分暴露,需要结合国内外最新标准研究进展和试点应用经验来分析IPv6+新协议、新技术、新地址编码可能会带来的安全风险和问题,强化IPv6+技术安全管理和防护手段,以做到安全保护措施与IPv6网络改造同步规划、同步建设、同步使用,为构建IPv6/IPv6+下一代网络安全防护体系开展前瞻布局研究。

关键词： IPv6+ 网络安全安全风险安全机制

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