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水利工程运行管理的安全风险评估

黄河水利职业技术学院学报 2024年第3期36卷 21-26页

作者：李忠艺罗甸县水务局贵州罗甸550199

水利工程在运行管理过程中面临着各种复杂的安全风险,适当识别、评估和有效管控这些风险,是确保水利工程安全稳定运行、维护公众利益的关键所在。从人员、组织、技术3个方面,构建了包含13个指标的水利工程运行管理安全风险评价指标体系... 详细信息

水利工程在运行管理过程中面临着各种复杂的安全风险,适当识别、评估和有效管控这些风险,是确保水利工程安全稳定运行、维护公众利益的关键所在。从人员、组织、技术3个方面,构建了包含13个指标的水利工程运行管理安全风险评价指标体系,建立了熵权-模糊综合评价模型,对马鞍山市10座小型水库的运行管理进行安全风险评价。根据评价结果,提出了相应的管理建议。

关键词：水利工程运行管理安全风险评估熵权-模糊综合评价模型指标体系权重隶属度

以系统观念构建高水平对外开放的发展格局——以辽宁为例

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辽宁行政学院学报 2024年第1期 58-64页

作者：李忠壹沈阳化工大学辽宁沈阳110142

打造对外开放新前沿是一项复杂的系统工程。要以习近平总书记关于对外开放的重要论述为根本遵循,坚持系统观念,坚持前瞻性思考、全局性谋划、整体性推进高水平对外开放,加强政策统筹,搞好战略支撑,服务发展大局,以打造对外开放新前沿实... 详细信息

打造对外开放新前沿是一项复杂的系统工程。要以习近平总书记关于对外开放的重要论述为根本遵循,坚持系统观念,坚持前瞻性思考、全局性谋划、整体性推进高水平对外开放,加强政策统筹,搞好战略支撑,服务发展大局,以打造对外开放新前沿实现辽宁全面振兴新突破。立足辽宁对外开放实践,应坚持系统观念,从构建全方位的交流协同大格局、打造高能级的对外开放新平台、积极担当东北地区的开放前沿地、服务和融入区域协调发展及打造东北亚开放合作枢纽五个方面发力,系统构建“大开放”工作格局,更好地融入和服务新发展格局,加快推动新时代辽宁全面振兴,奋力谱写中国式现代化辽宁新篇章。

关键词：系统观念对外开放新前沿辽宁全面振兴高水平对外开放高质量发展

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集成调整功能的座椅非线性悬架设计

振动与冲击 2024年第9期43卷 276-280页

作者：闫振华郭晓哲李忠燚李晓广宋嗣新吉林大学机械与航空航天工程学院长春130022 东风李尔汽车座椅有限公司技术中心武汉430000

为提高工程车辆座椅的低频隔振能力,及适应驾驶员身高、体质量参数的差异性,设计了一种集成身高和体质量调节功能的座椅非线性悬架,建立了核心设计参数与其力-位移特性间的数学模型,确定了主要设计参数。基于ADAMS软件仿真验证了座椅悬... 详细信息

为提高工程车辆座椅的低频隔振能力,及适应驾驶员身高、体质量参数的差异性,设计了一种集成身高和体质量调节功能的座椅非线性悬架,建立了核心设计参数与其力-位移特性间的数学模型,确定了主要设计参数。基于ADAMS软件仿真验证了座椅悬架的力-位移特性、调整功能,并制造了物理样机进行了试验验证。结果表明,所设计的悬架具有较好的非线性特性,高度、体质量参数可调,且参数的调整不影响悬架的低频隔振能力。

关键词：工程车辆座椅悬架非线性隔振调整机构

Two temperature-dependent 2D heterometallic Cd(Ⅱ)-Dy(Ⅲ)coordination polymers exhibiting slow magnetic relaxation and luminescence properties

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Journal of Rare Earths 2023年第4期41卷 613-620页

作者： zhongyi li Jiahui Bu Ran Zhang Chi Zhang Dongqing Wu Bin Zhai College of Chemistry and Chemical Engineering Shangqiu Normal UniversityShangqiu 476000China

Two unique two-dimensional(2D)Cd(Ⅱ)-Dy(Ⅲ)heterometallic coordination polymers,{[DyCd(HPMA)(PMA)_(2)(H_(2)O)_(4)]·2H_(2)O}_n(1)and[DyCd(PAA)(PMA)_(2)(H_(2)O)_(3)]_(n)(2,PAA^(-)=phenylacetate),were prepared successfully based on the phenylmalonic acid(H_(2)PMA).The construction of two polymers is sensitive to the reaction temperature and can be synthesized directionally at room temperature and 90℃,*** 1 and 2 display 2D layer structures that include dinuclear[Dy_(2)]cluster node and Dy(Ⅲ)-based 1D zigzag chain motif *** Dy(Ⅲ)-based units in two structures both are spaced well with the adjacent ones by the diamagnetic Cd(Ⅱ)-based *** magnetic studies reveal that 1 and 2both display slow magnetic relaxation with temperature-dependent relaxation peaks producing an effective energy barrier(Δτ)of 74.5 and 32.1 K,***,the solid-state photophysical properties of 1 and 2 show strong characteristic luminescent emissions of Dy(Ⅲ)ion in the visible region.

关键词： Heterometallic polymers Cd(Ⅱ)-Dy(Ⅲ)ions Slow magnetic relaxation Luminescence Bifunctional material Rare earths

稻秸-紫云英联合还田对水稻光合特性及产量品质的影响

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中国农业科技导报 2024年第2期26卷 171-180页

作者：李忠义唐红琴董文斌韦彩会何铁光广西农业科学院农业资源与环境研究所广西耕地保育重点试验室南宁530007

为评价稻秸-紫云英联合还田对水稻光合特性、产量及稻米品质的影响,采用田间随机试验,以不施氮肥为对照(CK),设置常规氮肥(N)、稻秸还田+常规氮肥(RN)、紫云英还田+常规氮肥(MN)、稻秸还田+紫云英还田+常规氮肥(MRN)、稻秸还田+紫云英还... 详细信息

为评价稻秸-紫云英联合还田对水稻光合特性、产量及稻米品质的影响,采用田间随机试验,以不施氮肥为对照(CK),设置常规氮肥(N)、稻秸还田+常规氮肥(RN)、紫云英还田+常规氮肥(MN)、稻秸还田+紫云英还田+常规氮肥(MRN)、稻秸还田+紫云英还田+60%氮肥(MRN60%),共计6个处理。对不同处理下的叶绿素含量(SPAD值)、净光合速率(net photosynthetic rate,Pn)、气孔导度(stomatal conductance,Gs)、胞间CO_(2)浓度(intercellular CO_(2)concentration,Ci)、蒸腾速率(transpiration rate,Tr)和干物质积累量、产量及稻米品质进行比较。结果表明,与CK相比,N、RN、MN、MRN和MRN60%处理均可显著提高水稻剑叶的SPAD值、Pn、Gs、稻谷产量及稻米糙米率、整精米率和蛋白含量,并显著降低直链淀粉含量。与N处理相比,在光合特性方面,MRN处理剑叶的SPAD值、净光合速率、气孔导度分别显著提高2.36%、5.95%、7.80%;在干物质积累量方面,MRN处理分蘖期、孕穗期、乳熟期的干物质积累量分别显著提高14.77%、3.52%、4.95%;在产量及构成因素方面,MRN处理的有效穗数、穗粒数、稻谷产量分别显著提高7.38%、3.08%、15.96%;在稻米品质方面,MRN处理的整精米率显著提高4.63%,直链淀粉含量显著降低6.54%。与N处理相比,MN处理仅净光合速率显著提高4.75%;MRN60%处理仅直链淀粉含量显著降低7.00%。相关分析结果表明,剑叶SPAD值、Pn和Gs均与有效穗数、穗粒数、产量、糙米率、整精米率呈极显著正相关,与直链淀粉含量呈极显著负相关;SPAD值和Pn与蛋白含量呈极显著正相关;Gs与蛋白含量呈显著正相关。综上,在常规施氮下,稻秸-紫云英联合还田可显著提高水稻剑叶的SPAD值、Pn、Gs等光合指标及水稻产量和蒸煮品质;在60%氮肥施用下,稻秸-紫云英联合还田有利于稳定水稻剑叶光合特性,保持水稻增产和品质特征,可应用于优质水稻生产。

关键词：稻秸紫云英光合特性产量稻米品质

Low-dimensional optoelectronic synaptic devices for neuromorphic vision sensors

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Materials Futures 2023年第3期2卷 72-89页

作者： Chengzhai Lv Fanqing Zhang Chunyang li zhongyi li Jing Zhao School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing Institute of TechnologyBeijing 100081People’s Republic of China

Neuromorphic systems represent a promising avenue for the development of the next generation of artificial intelligence *** vision,one of the cores in artificial intelligence,requires system-level support with low power consumption,low latency,and parallel *** vision sensors provide an efficient solution for machine vision by simulating the structure and function of the biological *** synapses,which use light as the main means to achieve the dual functions of photosensitivity and synapse,are the basic units of the neuromorphic vision ***,it is necessary to develop various optoelectronic synaptic devices to expand the application scenarios of neuromorphic vision *** review compares the structure and function for both biological and artificial retina systems,and introduces various optoelectronic synaptic devices based on low-dimensional materials and working *** addition,advanced applications of optoelectronic synapses as neuromorphic vision sensors are comprehensively ***,the challenges and prospects in this field are briefly discussed.

关键词： optoelectronic synaptic neuromorphic vision sensors synaptic plasticity low-dimensional visual function

直接和间接消费所引起的中国城乡空气污染相关过早死亡不平等性

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Science Bulletin 2024年第4期69卷 544-553页

作者：王旌旭林金泰刘宇吴锋倪睿婧陈璐璐任芳萱杜鸣溪李钟仪张浩雨刘正中 Frontier Science Center for Deep Ocean Multispheres and Earth System(FDOMES)and Physical Oceanography Laboratory Ocean University of ChinaQingdao 266100China College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Laboratory for Climate and Ocean-Atmosphere Studies Department of Atmospheric and Oceanic SciencesSchool of PhysicsPeking UniversityBeijing 100871China College of Urban and Environmental Sciences Peking UniversityBeijing 100871China Institute of Carbon Neutrality Peking UniversityBeijing 100871China State Key Laboratory of Resources and Environmental Information Systems Institute of Geographical Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China School of Public Policy and Administration Xi’an Jiaotong UniversityXi’an 710049China

Household consumption in China is associated with substantial PM_(2.5)pollution,through activities directly(i.e.,fuel use)and/or indirectly(i.e.,consumption of goods and services)causing pollutant *** and rural households exhibit different consumption preferences and living areas,thus their contributions to and suffering from air pollution could *** this contrast is crucial for comprehending the environmental impacts of the nation’s ongoing urbanization *** we quantify Chinese urban and rural households’contributions to ambient PM_(2.5)pollution and the health risks they suffer from,by integrating economic,atmospheric,and health models and/or *** national premature deaths related to long-term exposure to PM_(2.5)pollution contributed by total household consumption are estimated to be 1.1 million cases in 2015,among which 56%are urban households and 44%are rural *** pollution contributed indirectly,urban households,especially in developed provinces,tend to bear lower mortality risks compared with the portions of deaths or pollution they *** opposite results are true for direct *** China’s rapid urbanization process,without adequate reduction in emission intensity,the increased indirect pollution-associated premature deaths could largely offset that avoided by reduced direct pollution,and the indirect pollution-associated urban–rural inequalities might become *** pollution mitigation strategies from both production and consumption sides could help with reducing pollution-related mortality and associated urban-rural inequality.

关键词： Urban and rural households Pollution contribution Mortality risk Inequality PM_(2.5)

某工程连廊及不规则悬挑结构振动舒适度分析与控制

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建筑结构 2024年第13期54卷 99-104,50页

作者：丁海峰张金明蔡建国李仲毅叶霄鹏王洋中国铁建投资集团有限公司珠海519030 珠海铁建大厦置业有限公司珠海519030 东南大学国家预应力工程技术研究中心南京211189

针对某工程连廊及不规则悬挑结构,基于MIDAS/Gen软件建立有限元仿真分析模型,按照国内外相关规范,验算结构正常使用时各人行荷载工况下的舒适度。针对不满足要求的结构,开展基于调谐质量阻尼器(TMD)的振动控制分析,并对无控制状态及振... 详细信息

针对某工程连廊及不规则悬挑结构,基于MIDAS/Gen软件建立有限元仿真分析模型,按照国内外相关规范,验算结构正常使用时各人行荷载工况下的舒适度。针对不满足要求的结构,开展基于调谐质量阻尼器(TMD)的振动控制分析,并对无控制状态及振动控制后的计算结果进行对比。结果表明:连廊及悬挑结构在人行荷载激励下部分工况下竖向加速度响应超过规范限值,最大可达0.9839m/s^(2),采用TMD系统进行减振控制后,结构加速度响应得到有效降低;对于超限工况,TMD有效减振率在69%以上,最高减振率达90.82%,平均减率为85.59%。

关键词：大跨结构不规则悬挑结构人行荷载舒适度调谐质量阻尼器减振率

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Long-term and monthly changes in abundance,size composition and spatial distribution of the mantis shrimp Oratosquilla oratoriainthe BohaiSea

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Acta Oceanologica Sinica 2022年第12期41卷 80-86页

作者： Qiang Wu Qingpeng Han Yue Jin Tao Yang zhongyi li Xiujuan Shan Xianshi Jin Key Laboratory for Sustainable Development of Marine Fisheries Ministry of Agriculture and Rural Affairs/Shandong Provincial Key Laboratory for Fishery Resources and Eco-environmentYellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Fisheries College Ocean University of ChinaQingdao 266003China

With the decline in fish resources worldwide,the ecological dominance and economic importance of crustaceans have obviously *** crustacean species,mantis shrimps are increasingly dominant in many coastal waters of the *** China,Oratosquilla oratoria is the most widely distributed and productive species of mantis shrimp,and its relative resource density is the highest in the Bohai *** this study,we analysed the long-term and monthly population characteristics of *** in the Bohai Sea,including its relative resource density,body size and spatial *** results showed that the relative resource density of *** in the Bohai Sea increased from 3.59 kg/h in 1982 to 14.48 kg/h in 2018,and the percentage of this species that serves as a fishery resource increased from 4.22%in 1982 to 35.27%in 2018,based on the mean relative resource density in May and *** relative resource density of *** in the fishing moratorium season from May to August was significantly higher than that in the other months of fishing season,and the relative resource density decreased rapidly after the fishing moratorium *** relative resource density of *** was the highest in summer(August),followed by in autumn(October)and spring(May),and it was the lowest in winter(January).The relative resource density of *** in the western Bohai Sea was higher than that in the eastern Bohai *** mean body weight of *** in the Bohai Sea decreased from 21.95 g in 1982 to 14.34 g in 2018,based on the mean body weight in May and *** body size of *** in the fishing moratorium season was significantly higher than that in the fishing season,and the body size decreased rapidly after the fishing moratorium ***,in the context of declining resources of most fishery species,the relative resource density of *** increased due to its hardiness and adaptability,and its body size decreased under intensive fishing over t

关键词： long-term and monthly changes population dynamics mantis shrimp Oratosquilla oratoria Bohai Sea