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Epidemic modeling for the resurgence of COVID-19 in Chinese local communities

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Journal of Safety Science and Resilience 2022年第3期3卷 229-234页

作者： Min Peng Jianing Zhang jingrui Gong Xingqi Ran Jvlu Liu Lin Zhang School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China

COVID-19 is a constantly challenging global health issue due to its strong intensity,rapid mutation and high *** new Delta and Omicron variants have triggered massive outbreaks *** China,which has done a good job in outbreak prevention,is still heavily affected by the *** long-term fight against multiple COVID-19 outbreaks is *** this study,we propose an SEIQR model that considers the incubation period and quarantine *** verified our model using actual outbreak data from four Chinese *** simulations show that a five-day delay results in a double resurgence *** model can be used as a tool to understand the spread of the virus quantitatively and provide a reference for policymaking accordingly.

关键词： COVID-19 Mutation Resurgence SEIQR model Quarantine

Impact of SF_(6) Decomposition Products on Epoxy Resin Chemical Stability and Doping-nano-Al_(2)O_(3)-based Enhancement Using the ReaxFF-MD Method

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CSEE Journal of Power and Energy Systems 2023年第2期9卷 779-789页

作者： jingrui Wang Qingmin Li heng Liu Jian Wang Yanan Chang Qi Hu Manu A.Haddad State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Advanced High Voltage Engineering Research Centre School of EngineeringCardiff UniversityThe ParadeCardiff CF243AAUK

Chemically active by-products formed by corona discharge in SF_(6) gas are prone to damaging the exposed epoxy resin,or even leading to an entire insulation failure of the operational GIS/GIL power *** this proposed research,reactive force field molecular dynamic simulation methodology is applied to investigate the chemical reaction kinetics of epoxy polymer under the impact of highly energetic particles(F,S,SOF,SF,OH and O)so as to explain the degradation *** all cases,SF particle-impacted epoxy resin suffers the most serious surface erosion with the lowest remnant mass of 9%and deepest damage penetration of 32.6Å,to which the S particle-caused damage showed similar *** to high reactivity of the S atom,it can merge into the epoxy molecules to promote long chain breaking,causing a six-membered ring opening and further dissociation of short carbon chains,which makes the epoxy resin molecules undergo faster spontaneous dissociation with increased *** changes of small molecular gas products,such as CO_(2),H_(2)O and CH_(2)O,as well as that of the characteristic products,such as HF,CS_(2),SO and H_(2)S,are also evaluated under the impact of different *** presented research indicates that enhancing the resistance strength of epoxy polymer against S and SF particles'corrosion is the key approach to improving chemical stability in the SF_(6) *** studies were implemented to optimize the concentration and diameter of nano-Al_(2)O_(3) doped in the *** to this paper,aluminum nanoparticle with a diameter of 1nm could significantly reduce the erosion caused by SF and S *** micro-scale mechanism lies primarily within two aspects:the nanoparticles improve the surface heat transfer efficiency as to reduce temperature rise,and also provide an effective protection area by balancing distribution and self-exposing,which finally slows down the pyrolysis process of epoxy resin,as well as the re

关键词： Al_(2)O_(3)nanoparticle corona discharge in SF_(6) epoxy resin molecular dynamics particle impact reactive force field

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煤炭地下气化开发利用现状与发展趋势

中国煤炭 2024年第2期50卷 13-23页

作者：陈井瑞杨瑞召韩枫涛许超孙梦迪张昊中国矿业大学〈北京〉地球科学与测绘工程学院北京市海淀区100083

煤炭地下气化(UCG)作为一种可以将固体煤转化为气体燃料的技术,将煤炭在地下进行气化反应,可以缓解由于在地上燃烧煤炭而产生的大气污染,助力碳减排社会效益,对于实现低碳发展具有重要作用。以建立“清洁、低碳、安全、高效”的能源获... 详细信息

煤炭地下气化(UCG)作为一种可以将固体煤转化为气体燃料的技术,将煤炭在地下进行气化反应,可以缓解由于在地上燃烧煤炭而产生的大气污染,助力碳减排社会效益,对于实现低碳发展具有重要作用。以建立“清洁、低碳、安全、高效”的能源获取方式为出发点,介绍了我国煤炭地下气化的研究历程、发展目标和政策方针,对我国发布的关于煤炭资源利用和煤炭地下气化技术的相关政策进行了分析解读。分别从经济、环境、社会效益3个维度对煤炭地下气化的开发利用价值进行分析,指出煤炭地下气化技术的开发利用可以为我国煤炭行业带来一定的效益。同时,在推动煤炭地下气化技术的发展过程中,还要注重环境保护和管理措施,确保技术实施的安全性和可持续性。基于PESTEL模型从政治、经济、社会、技术、环境、法律5个方面对煤炭地下气化技术的开发进行全面、系统的分析,并阐述了我国煤炭地下气化技术发展的不利因素。最后根据PESTEL模型分析结果,从技术、政策和环境3个方面对我国煤炭地下气化的发展提出了相应的解决方案和政策性建议。结果表明,煤炭地下气化技术具有潜在的经济和环境优势,需加强国内高校、企业与能源公司的协同合作,扩大国际合作范围,并制定和执行环境保护措施,以推动煤炭地下气化技术的发展,实现可持续能源开发和环境保护的双赢。

关键词：煤炭地下气化煤炭开发利用 PESTEL模型 “双碳”目标

基于Snyder希望理论的心理干预对肺癌患者化疗不良反应、心理弹性、希望水平的影响

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癌症进展 2024年第7期22卷 796-799页

作者：李珍珍赵广慧杨静蕊平煤神马医疗集团总医院肿瘤内科河南平顶山4670000

目的探究基于Snyder希望理论的心理干预对肺癌患者化疗不良反应、心理弹性、希望水平的影响。方法将122例肺癌化疗患者按干预方式的不同分为对照组和研究组,每组61例。对照组患者接受常规干预,研究组患者在对照组的基础上接受基于Snyde... 详细信息

目的探究基于Snyder希望理论的心理干预对肺癌患者化疗不良反应、心理弹性、希望水平的影响。方法将122例肺癌化疗患者按干预方式的不同分为对照组和研究组,每组61例。对照组患者接受常规干预,研究组患者在对照组的基础上接受基于Snyder希望理论的心理干预。比较两组患者的心理弹性[心理弹性量表简化版(CD-RISC10)]、希望水平[herth希望量表(HHI)]、肺功能指标、不良反应及治疗依从性。结果干预后,研究组患者CD-RISC10和HHI量表评分均明显高于对照组,差异均有统计学意义(P﹤0.01)。干预后,研究组患者肺总量、肺活量、一氧化碳弥散量均明显高于对照组,差异均有统计学意义(P﹤0.01)。研究组患者不良反应总发生率低于对照组,治疗依从率高于对照组,差异均有统计学意义(P﹤0.05)。结论基于Snyder希望理论的心理干预能有效提高肺癌患者的心理弹性和希望水平,改善肺功能,降低不良反应发生率,提高治疗依从性。

关键词： Snyder希望理论心理干预肺癌化疗希望水平心理弹性

An Indirect Prediction Method of Remaining Life Based on Glowworm Swarm Optimization and Extreme Learning Machine for Lithium Battery

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An Indirect Prediction Method of Remaining Life Based on Glo...

Early development,life history and ecological habits of Grateloupia constricata Li et Ding

第36届中国控制会议

作者： jingrui Wu Jinxue Xu Xiaoling Huang Dalian Maritime University

ISBN: (纸本)9781538629185

Aiming at the problem that the capacity of lithium battery is difficult to monitor on-line,an indirect health factor method based on time interval to equal discharging voltage difference is *** correlation coefficient analysis method is used to prove strong correlation between actual capacity and time interval to equal discharging voltage *** swarm optimization algorithm is employed to optimize extreme learning machine,meanwhile a model based on glowworm swarm optimization and extreme learning machine is built in order to realize the indirect prediction of remaining useful life for lithium *** set of NASA B5 lithium battery is taken as a research object to evaluate the remaining useful *** results show that the algorithm can inherit the advantage of fast learning speed of extreme learning machine,and be of better accuracy and stability compared with extreme learning machine.

关键词： Lithium battery remaining life prediction indirect health factor extreme learning machine glowworm swarm optimization

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Acta Oceanologica Sinica 2020年第10期39卷 155-161页

作者： Yuanyuan Ding Yao Bian Huina Wang Jing Liu jingrui Li Hongwei Wang College of Life Sciences Liaoning Normal UniversityDalian 116000China

As the largest genus of Halymeniaceae,Grateloupia has been widely ***,we observed the life history and early development of Grateloupia constricata Li et Ding and investigated the effects of temperature,irradiance,and photoperiod on the discoid crust and sporeling development of *** under laboratory *** observed that the type of carpospore development was“mediate discal type”.The life history included homotypic gametophyte(haploid),carposporophyte(diploid),and tetrasporophyte(diploid),with typical isomorphic alternation of *** results of double factorial analysis showed that both single factorial effects and interaction among temperature,photoperiod,and irradiance were obviously significant on the discoid crust and sporeling ***,we found that the optimum combination of condition for the early growth and development of *** was temperature 20°C,irradiance 80μmol photons/(m^2·s)and photoperiod 16L:*** study provides the theoretical basis and technical support for the conservation of the Grateloupia germplasm,artificial breeding,large-scale cultivation and sustainable development.

关键词： carpospore life history alternation of generations temperature irradiance photoperiod

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创新城市——AI带给城市规划的巨大变化

中外建筑 2024年第1期 14-20页

作者：肖哲涛寿新民杨赟澎曹景睿华北水利水电大学建筑学院华北水利水电大学珠海科技学院美术与设计学院新纪元大学学院

随着AI的飞速进步,城市规划领域正面临前所未有的变革,其在城市规划中的创新应用亦成为关注的焦点。通过深入剖析AI对城市规划的深远影响及独特优势,从多维度探讨AI与城市设计的研究趋势,特别关注AI在城市规划中的创新融合。研究表明,A... 详细信息

随着AI的飞速进步,城市规划领域正面临前所未有的变革,其在城市规划中的创新应用亦成为关注的焦点。通过深入剖析AI对城市规划的深远影响及独特优势,从多维度探讨AI与城市设计的研究趋势,特别关注AI在城市规划中的创新融合。研究表明,AI的应用为城市规划带来了前所未有的突破与挑战,从感知、认知到行动与决策,AI均是未来发展的重要路径。然而,AI终究只是城市规划师的实用工具,应审慎权衡其技术利弊,确保其在服务城市居民的同时,不会加剧社会分化,而是推动城市向包容性和可持续性发展。

关键词：人工智能(AI) 城市规划城市设计 AI生成辅助决策

LEO Mega Constellations:Review of Development,Impact,Surveillance,and Governance

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Space(Science & Technology) 2022年第1期2022卷 472-488页

作者： jingrui Zhang Yifan Cai Chenbao Xue Zhirun Xue Han Cai School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China

The rapid development of Low Earth Orbit(LEO)mega constellations has significantly contributed to several aspects of human scientific progress,such as communication,navigation,and remote ***,unrestrained deployment of constellations has also strained orbital resources and increased spacecraft congestion in LEO,which seriously affects the safety of in-orbit operations of many space *** the long-term and sustainable development of space activities in LEO regions,space environment stability must be maintained using more rational surveillance and governance *** review contributes to the research gap and facilitates the development of LEO mega ***,the current development of typical LEO mega constellations is reviewed,followed by the analysis of the impact of LEO mega constellations in terms of astronomical observation,spacecraft safety in orbit,and space environment ***,two main solutions to conduct the challenges raised by LEO mage constellations are elaborated:one is to ensure the safety operation of spacecraft using space surveillance infrastructures and space situational awareness technologies,and the other is to accelerate the deorbit of constellation satellites at the end of life based on postmission disposal and active removal ***,the future development and potential research directions of LEO mega constellations are prospected.

关键词： Impact restrained maintained

船用微引燃甲醇发动机喷油器参数对燃烧和排放特性的影响

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中国舰船研究 2024年第4期19卷 131-138页

作者：吴德杨温华兵徐昌春李敬瑞沈建华靖海国江苏科技大学能源与动力学院江苏镇江212114 镇江中船动力有限公司江苏镇江212002

[目的]为改善大功率船用发动机燃烧、性能及排放,采用柴油微喷引燃甲醇喷射方式,研究发动机缸内燃烧和排放特性。[方法]基于一台大缸径船用ACD320中速柴油机,建立柴油微喷引燃甲醇发动机三维仿真模型,研究喷油器参数(喷孔数与甲醇喷雾... 详细信息

[目的]为改善大功率船用发动机燃烧、性能及排放,采用柴油微喷引燃甲醇喷射方式,研究发动机缸内燃烧和排放特性。[方法]基于一台大缸径船用ACD320中速柴油机,建立柴油微喷引燃甲醇发动机三维仿真模型,研究喷油器参数(喷孔数与甲醇喷雾夹角γ)对大缸径船用甲醇发动机燃烧性能与排放特性的影响。[结果]研究结果表明:随着喷孔数的增加,缸内甲醇雾化效果较好,使缸内工质混合较充分,CA50提前,燃烧持续期缩短,获得了较高的指示热效率和较好的燃油消耗率,并有助于降低碳烟排放,但会导致NO_(x)排放量升高。但随着甲醇喷雾夹角的增大,指示热效率增大,能够获得较好的燃油经济性和较低碳烟排放量。当甲醇喷雾夹角位于柴油喷雾夹角时(γ>60°),缸内火焰传播速度较快,指示热效率较大,燃料燃烧较充分,获得碳烟最低排放量和最优燃油消耗率。[结论]分析结果可为发动机喷油器布置提供了理论依据。

关键词：甲醇微喷引燃缸内直喷甲醇喷雾夹角排放