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一起110kV变压器重瓦斯保护误跳运行线路事故分析

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山东电力高等专科学校学报 2024年第4期27卷 5-8页

作者：袁慧涛程昭龙袁文涛国网山东省电力公司菏泽供电公司山东菏泽274000 河南工学院河南新乡453003

针对一起110kV变压器重瓦斯保护动作导致运行线路跳闸的事故,结合事故前变电站运行方式、跳闸后保护动作信息及现场检查结果,分析了变压器重瓦斯保护误跳运行线路的过程,确定了事故原因,发现了在变压器保护二次电缆运维、变电站配置描... 详细信息

针对一起110kV变压器重瓦斯保护动作导致运行线路跳闸的事故,结合事故前变电站运行方式、跳闸后保护动作信息及现场检查结果,分析了变压器重瓦斯保护误跳运行线路的过程,确定了事故原因,发现了在变压器保护二次电缆运维、变电站配置描述文件、设备验收等方面存在的问题,并制定了相应的整改措施,以保证电网安全稳定运行。

关键词：变压器重瓦斯保护事故分析

Association between porpoise presence and fish choruses:implications for feeding strategies and ecosystem-based conservation of the East Asian finless porpoise

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Integrative Zoology 2023年第1期18卷 169-182页

作者： zhaolong cheng Yongtao LI Matthew Keith PINE Tao ZUO Mingxiang NIU Jun WANG Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdaoChina Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)QingdaoChina Department of Biology University of VictoriaVictoriaBritish ColumbiaCanada

The associations between feeding activities and environmental variables inform animal feeding tactics that max-imize energetic gains by minimizing energy costs while maximizing feeding *** studies in aquatic animals,particularly marine mammals,are scarce due to difﬁculties in the observation of feeding behaviors in aquatic *** data scarcity concurrently hinders ecosystem-basedﬁshery management in the context of small toothed-cetacean *** the present study,a passive acoustic monitoring station was deployed in an East Asianﬁnless porpoise habitat in Laizhou Bay to investigate potential relationships between East Asianﬁnless porpoises and their *** data revealed that porpoises were acoustically present nearly every day during the survey *** detection rates differed between spring and autumn in concert with activities ofﬁsh *** spring,ﬁsh choruses were present throughout the afternoon,and this was the time when porpoise vocalizations were the most frequently *** autumn,whenﬁsh choruses were absent,porpoise detec-tion rates decreased,and diurnal patterns were not *** close association betweenﬁsh choruses andﬁn-less porpoise activities implies an“eavesdropping”feeding strategy to maximize energetic gains,similar to other toothed cetaceans that are known to engage similar feeding *** noise pollution,particularly those maskingﬁsh choruses,could interruptﬁnless porpoises’feeding *** competing soniferousﬁshes withﬁnless porpoise could impactﬁnless porpoise viability through ecosystem disruption,in addition toﬁshing gear entanglement.

关键词： diel pattern noise andﬁshery management optimal foraging theory passive acoustic monitoring

The intestinal microbiome of an Indo-Pacific humpback dolphin(Sousa chinensis)stranded near the Pearl River Estuary,China

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Integrative Zoology 2021年第3期16卷 287-299页

作者： Xiaoling WAN Jia LI zhaolong cheng Mengxue AO Renmao TIAN Richard William MCLAUGHLIN Jinsong ZHENG Ding WANG The Key Laboratory of Aquatic Biodiversity and Conservation of the Chinese Academy of Sciences Institute of HydrobiologyChinese Academy of SciencesWuhanChina University of Chinese Academy of Sciences BeijingChina Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdaoChina Institute for Environmental Genomics Department of Microbiology and Plant BiologySchool of Civil Engineering and Environmental SciencesUniversity of OklahomaNormanOklahomaUSA Institute for Food Safety and Health Illinois Institute of TechnologyBedford ParkIllinoisUSA General Studies Gateway Technical CollegeKenoshaWisconsinUSA

The mammalian intestinal microbiome is critical for host health and disease ***,the cetacean intestinal microbiota remains relatively *** using high-throughput 16S rRNA gene sequencing,we analyzed intestinal bacterial samples from an Indo-pacific humpback dolphin(Sousa chinensis)stranded near the Pearl River Estuary in *** samples included 3 anatomical regions(foregut,midgut,and rectum)and 2 anatomical locations(content and mucus).Our analyses revealed that the dolphin intestinal bacteria contained 139 operational taxonomic units(OTUs),dominated at the phyla level by Firmicutes(47.05%in the content;94.77%in the mucus),followed by Bacteroidetes(23.63%in the content;1.58%in the mucus)and Gammaproteobacteria(14.82%in the content;2.05%in the mucus).The intestinal bacteria had a small core community(15 OTUs,accounting for 99.74%of the reads),some of which could be potentially pathogenic to both human and *** an alternative to sampling the dolphin intestinal bacteria,fecal sampling could be ***,function potentials such as,xenobiotics biodegradation,beta-lactam resistance,and human disease-related pathways,were detected in the dolphin intestinal *** findings provide the first baseline knowledge of the intestinal microbiome of the Indo-Pacific humpback dolphin,which may offer new insights into cetacean conservation by using microbial surveillance.

关键词： 16S rRNA gene high-throughput sequencing anthropogenic impact cetacean indo-pacific humpback dolphin intestinal microbiota

Mesoporous amorphous FeOOH-encapsulated BiO_(2–x) photocatalyst with harnessing broad spectrum toward activation of persulfate for tetracycline degradation

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Chinese Journal of Chemical Engineering 2024年第7期71卷 235-248页

作者： Pengfei Wu zhaolong Liu Li Wu Yingkun Zhang Bing Wang Zhanghao cheng Wenquan Cui Xiangyang Lv Qingling Liu Tianjin Key Laboratory of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin 300350China Hebei Pollution Control Technology Innovation Center of Steel and Coking Industry Department of Environmental and Chemical EngineeringHebei College of Industry and TechnologyShijiazhuang 050091China Hebei Key Laboratory of Environmental Photocatalytic and Electrocatalytic Materials College of Chemical EngineeringNorth China University of Science and TechnologyTangshan 063210China Hebei Academy of Product Quality Supervision&Inspection Shijiazhuang 050227China

With the growing concern about the water environment,the advanced oxidation process of persulfate activation assisted by photocatalysis has attracted considerable attention to decompose dissolved organic *** this work,to overcome the drawbacks of the photocatalytic activity reduction caused by the photo-corrosion of non-stoichiometric BiO_(2–x),a novel material with amorphous FeOOH in situ grown on layered BiO_(2–x) to form a core-shell structure similar to popcorn chicken-like morphology was produced in two simple and environmentally beneficial *** a series of degradation activity tests of hybrid materials under different conditions,the as-prepared materials exhibited remarkable degradation activity and stability toward tetracycline in the FeOOH@BiO_(2–x)/Vis/PS system due to the synergism of photocatalysis and persulfate *** results of XRD,SEM,TEM,XPS,FTIR,and BET show that the loading of FeOOH increases the specific surface area and active sites appreciably;the heterogeneous structure formed by FeOOH and BiO_(2–x) is more favorable to the effective separation of photogenerated *** optimal degradation conditions were at a catalyst addition of 0.7 g·L^(–1),a persulfate concentration of 1.0 g·L^(–1),and an initial pH of 4.5,at which the degradation rate could reach 94.7%after 90 *** influence of typical inorganic anions on degradation was also *** studies and radical quenching experiments revealed that·OH,SO_(4)^(-)·,and·O_(2)^(-)were the principal active species generated during the degradation of *** results of the 1,10-phenanthroline approach proved that the effect of dissolved iron ions on the tetracycline degradation was limited,and the interfacial reaction that occurs on the active sites on the material's surface was a critical *** work provides a novel method for producing efficient broad-spectrum Bismuth-based composite photocatalysts and photocatalytic-activated persulfate synerg

关键词： Amorphous FeOOH BiO_(2–x) Activated persulfate Photocatalytic Tetracycline degradation

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一种设置地下连续墙钢筋笼吊点的新方法

宁波大学学报（理工版） 2024年第3期37卷 1-12页

作者：蒋昊成徐新战侯舟洲严吉涛成朝龙曹三华王佩朱珏宁波大学压力容器与管道安全浙江省工程研究中心浙江宁波315211 浙江易通特种基础工程股份有限公司浙江宁波315800

钢筋笼吊装过程中的状态可以看作是在分布荷载和集中荷载共同作用下的多支承悬挑梁,其中支承点对应于吊点.本文基于奇异函数和拉普拉斯变换,求解了梁的挠度曲线方程,并结合遗传算法,提出了一种设置直列式钢筋笼最优吊点的新方法.通过算... 详细信息

钢筋笼吊装过程中的状态可以看作是在分布荷载和集中荷载共同作用下的多支承悬挑梁,其中支承点对应于吊点.本文基于奇异函数和拉普拉斯变换,求解了梁的挠度曲线方程,并结合遗传算法,提出了一种设置直列式钢筋笼最优吊点的新方法.通过算例和数值模拟验证了该方法的可行性.结果表明,与现有的吊点确定方法相比,该方法能更有效地控制钢筋笼在吊装过程中的变形.

关键词：钢筋笼吊装点奇异函数拉普拉斯变换遗传算法有限元模拟

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提升管出口SVQS自然旋风长度的数值模拟

化工学报 2016年第8期67卷 3347-3356页

作者：程兆龙鄂承林卢春喜中国石油大学(北京)重质油国家重点实验室北京102249

采用RNG k-ε湍流模型对一套?600 mm×4150 mm的SVQS旋流快分装置的气相流场及自然旋风长度进行了模拟研究。结果表明,SVQS旋风尾涡的截面位置与隔流筒下端面最大切向速度衰减达88%时的截面位置相吻合,并据此定义了SVQS的自然旋风长度... 详细信息

采用RNG k-ε湍流模型对一套?600 mm×4150 mm的SVQS旋流快分装置的气相流场及自然旋风长度进行了模拟研究。结果表明,SVQS旋风尾涡的截面位置与隔流筒下端面最大切向速度衰减达88%时的截面位置相吻合,并据此定义了SVQS的自然旋风长度。基于SVQS旋流快分切向速度的分布规律发现,SVQS的自然旋风长度随喷口气速的增加和汽提气速的减小而逐渐增大。参照旋风分离器自然旋风长度的计算方法,基于SVQS旋流快分的结构特点及模拟计算结果,提出了提升管出口SVQS旋流快分自然旋风长度的计算关系式。

关键词：提升管分离计算流体力学

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220 kV线路非全相运行事故分析

山东电力技术 2018年第8期45卷 41-45页

作者：孔宁程昭龙国网山东省电力公司菏泽供电公司山东菏泽274012

500 k V变电站的220 k V线路合环操作后,保护装置发"保护长期启动"信号。检查发现该线路合环后出现了非全相运行情况,但线路两侧开关、刀闸的机械和电气位置指示经检查均无异常。对220 k V乙站的线路侧刀闸进行停电检查,对刀闸机械特性... 详细信息

500 k V变电站的220 k V线路合环操作后,保护装置发"保护长期启动"信号。检查发现该线路合环后出现了非全相运行情况,但线路两侧开关、刀闸的机械和电气位置指示经检查均无异常。对220 k V乙站的线路侧刀闸进行停电检查,对刀闸机械特性及其回路电阻进行测试,对气室气体进行组分分析。结果发现该刀闸A相回路电阻偏大,C相开路,气室SF6分解产物SO2、H2S含量严重超标。对该刀闸GIS气室解体后发现C相动、静触头有烧蚀痕迹,气室内有粉尘。经分析知此次220 k V线路非全相运行事故系刀闸安装工艺问题引起的A、C相操作机构行程误差偏大导致动、静触头间接触电阻过大造成。

关键词： 220kV线路非全相运行刀闸机构行程误差事故分析

110 kV线路故障造成220 kV变压器跳闸的事故分析

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山东电力技术 2020年第11期47卷 62-66页

作者：程昭龙张亚宁国网山东省电力公司菏泽供电公司山东菏泽274000

短路容量不足易导致变压器抗短路能力大幅下降,若变压器所供下级线路出口发生永久性短路,较大的故障电流产生的电动力易造成变压器内部绕组变形,进而导致变压器跳闸。针对一起110 kV线路故障引起上级变压器跳闸事故,通过分析事故前后的... 详细信息

短路容量不足易导致变压器抗短路能力大幅下降,若变压器所供下级线路出口发生永久性短路,较大的故障电流产生的电动力易造成变压器内部绕组变形,进而导致变压器跳闸。针对一起110 kV线路故障引起上级变压器跳闸事故,通过分析事故前后的变压器运行方式、保护动作情况以及故障变压器的油色谱,并利用频率响应、短路阻抗分析法分别测量变压器直流电阻与短路阻抗。根据试验数据分析验证故障变压器绕组变形,进而证明变压器所供下级线路故障会降低变压器的抗短路能力,对变压器的设计要求、调度运行、事故处理及抗短路能力提高提供参考。

关键词：变压器短路容量抗短路频率响应分析调度运行

基于产教融合的应用型地方本科高校人才培养体系研究

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梧州学院学报 2023年第3期33卷 50-55页

作者：江成英程兆龙梧州学院食品与制药工程学院(六堡茶现代产业学院) 广西梧州543002 广西六堡茶种质创新与综合利用工程研究中心广西梧州543002 梧州学院财务处广西梧州543002

坚持产教融合是党的十九大报告明确的改革任务,是应用型地方本科高校培养对接区域经济发展人才的必由之路。产教融合为进一步深化教育改革、提升应用型地方本科高校人才培养质量提供了有效途径。文章以地方产业发展需求为导向,客观地分... 详细信息

坚持产教融合是党的十九大报告明确的改革任务,是应用型地方本科高校培养对接区域经济发展人才的必由之路。产教融合为进一步深化教育改革、提升应用型地方本科高校人才培养质量提供了有效途径。文章以地方产业发展需求为导向,客观地分析了目前应用型地方本科高校在深化产教融合、促进产学合作、实现区域经济联动等方面的现存问题。针对出现的问题,在深入剖析其原因的基础上,提出了构建基于产教融合的应用型地方本科高校对接区域经济发展的人才培养体系,旨在通过人才培养模式、专业集群及师资队伍建设、课程体系结构包括实践教学体系结构、教学内容、运行管理机制等环节的改革创新,建立起与区域产业集群紧密结合的、服务于区域经济发展的产教融合人才培养体系,培养发展区域经济建设所需的创新人才。

关键词：区域经济产教融合应用型人才地方本科高校