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圆台形大空心率中空夹层钢管混凝土构件压扭性能研究

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建筑结构学报 2024年第3期45卷 136-147页

作者：邓然周绪红王宇航冀卫东文浩重庆大学土木工程学院重庆400045 香港理工大学土木及环境工程学系中国香港999077 金风科创风电设备有限公司北京100176

圆台形大空心率中空夹层钢管混凝土(TLHR-CFDST)基于传统中空夹层钢管混凝土(CFDST)发展而来,在实际工程中常受到压-扭复合荷载作用。为研究TLHR-CFDST构件的压扭性能,设计了6个试件并进行静力加载试验,主要试验参数包括锥角、空心率和... 详细信息

圆台形大空心率中空夹层钢管混凝土(TLHR-CFDST)基于传统中空夹层钢管混凝土(CFDST)发展而来,在实际工程中常受到压-扭复合荷载作用。为研究TLHR-CFDST构件的压扭性能,设计了6个试件并进行静力加载试验,主要试验参数包括锥角、空心率和轴压比。在试验的基础上,建立TLHR-CFDST压扭构件的有限元模型,进一步分析其工作机理和参数影响。结果表明:在压扭荷载作用下,TLHR-CFDST构件在上部截面发生破坏;当锥角增大时,构件的抗扭刚度和受扭承载力下降,而空心率对受扭承载力影响较小;当轴压比不超过0.4时,构件表现出良好的延性,但当轴压比大于0.4后,构件的扭矩-扭转角曲线出现下降段,受扭承载力有较大程度的降低;在钢管的约束下,混凝土受扭开裂后可以继续承担荷载;构件在不同参数下的压扭承载力相关曲线基本一致。基于承载力相关方程,建立了适用于TLHR-CFDST构件的压扭承载力计算方法,该方法预测的承载力与试验及数值计算结果吻合较好。

关键词：中空夹层钢管混凝土构件锥角大空心率复合荷载作用静力试验有限元分析压扭性能

趋优变异反向学习的樽海鞘群与蝴蝶混合优化算法

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计算机应用研究 2024年第3期41卷 721-728,763页

作者：黄鑫宇马宁付伟季伟东亓文凤哈尔滨师范大学计算机科学与信息工程学院哈尔滨150025

针对蝴蝶优化算法(butterfly optimization algorithm,BOA)易陷入局部最优,且收敛速度慢和寻优精度低等问题,提出了一种趋优变异反向学习的樽海鞘群与蝴蝶混合优化算法(hybrid optimization algorithm for salp swarm and butterfly with reverse mutation towards optimization learning,OMSSBOA)。引入柯西变异对最优蝴蝶个体进行扰动,避免算法陷入局部最优;将改进的樽海鞘群优化算法(salp swarm algorithm,SSA)嵌入到BOA,平衡算法全局勘探和局部开采的比重,进而提高算法收敛速度;利用趋优变异反向学习策略扩大算法搜索范围并提升解的质量,进而提高算法的寻优精度。将改进算法在10种基准测试函数上进行仿真实验,结果表明,改进算法具有较好的寻优性能和鲁棒性。

关键词：蝴蝶优化算法樽海鞘群优化算法柯西变异趋优变异反向学习领导者策略

68.75%噁酮·锰锌水分散粒剂对柑桔黑点病的防治效果

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中国南方果树 2024年第3期53卷 43-47页

作者：蒲占湑季卫东黄振东董方圆李红叶浙江省柑橘研究所浙江台州318000 常山县农业农村局浙江常山324200 浙江省常山县同弓乡人民政府浙江常山324216 浙江大学生物技术研究所杭州310058

柑桔黑点病(由Diaporthe citri引起)是危害柑桔果实商品性最严重的病害之一,每年需要喷施4~5次杀菌剂进行防治。为明确68.75%噁酮·锰锌水分散粒剂(6.25%噁唑菌酮和62.5%代森锰锌的混剂)对柑桔果实黑点病的防治效果,分别在浙江黄岩和常... 详细信息

柑桔黑点病(由Diaporthe citri引起)是危害柑桔果实商品性最严重的病害之一,每年需要喷施4~5次杀菌剂进行防治。为明确68.75%噁酮·锰锌水分散粒剂(6.25%噁唑菌酮和62.5%代森锰锌的混剂)对柑桔果实黑点病的防治效果,分别在浙江黄岩和常山进行了田间试验。结果发现,黄岩试验点68.75%噁酮·锰锌水分散粒剂500倍液全程5次用药对黑点病的防治效果为84.79%,常山试验点800倍液全程4次用药对黑点病的防治效果为74.10%,效果不亚于常规推荐的杀菌剂代森锰锌。认为,生产中采用68.75%噁酮·锰锌水分散粒剂500~800倍液在柑桔谢花2/3进行第1次树冠喷雾,此后隔20~25 d喷1次,共喷4~5次,可有效防治柑桔黑点病。

关键词：柑桔黑点病噁酮·锰锌防治效果

维普期刊数据库博看期刊

Genome-wide association study identifies novel candidate loci or genes affecting stalk strength in maize

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The Crop Journal 2023年第1期11卷 220-227页

作者： Shuhui Xu Xiao Tang Xiaomin Zhang Houmiao Wang weidong ji Chenwu Xu Zefeng Yang Pengcheng Li jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of Plant Functional Genomics of the Ministry of Education/jiangsu Key Laboratory of Crop Genomics and Molecular Breeding Yangzhou UniversityYangzhou 225009JiangsuChina jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009JiangsuChina National Maize Improvement Center of China China Agricultural UniversityBeijing 100193China State Key Laboratory of Crop Stress Adaptation and Improvement Key Laboratory of Plant Stress BiologySchool of Life SciencesHenan UniversityKaifeng 475001HenanChina

Stalk strength increases resistance to stalk lodging,which causes maize(Zea mays L.)production losses *** genetic mechanisms regulating stalk strength remain *** this study,three stalk strength-related traits(rind penetrometer resistance,stalk crushing strength,and stalk bending strength)and four plant architecture traits(plant height,ear height,stem diameter,stem length)were measured in three field *** phenotypic variation was detected for these traits.A genome-wide association study(GWAS)was conducted using general and mixed linear models and 372,331 single-nucleotide polymorphisms(SNPs).A total of 94 quantitative trait loci including 241 SNPs were *** combining the GWAS data with public gene expression data,56 candidate genes within 50 kb of the significant SNPs were identified,including genes encoding flavonol synthase(GRMZM2G069298,ZmFLS2),nitrate reductase(GRMZM5G878558,ZmNR2),glucose-1-phosphate adenylyltransferase(GRMZM2G027955),and laccase(GRMZM2G447271).Resequencing GRMZM2G069298 and GRMZM5G878558 in all tested lines revealed respectively 47 and 2 variants associated with *** of the RPR of the zmnr2EMS mutant and the wild-type plant under high-and low-nitrogen conditions verified the GRMZM5G878558 *** findings may be useful for clarifying the genetic basis of stalk *** identified candidate genes and variants may be useful for the genetic improvement of maize lodging resistance.

关键词： Stalk strength Maize GWAS Candidate genes Lodging resistance

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海上风电中的基础冲刷低频振动监测系统分析

电子技术（上海） 2024年第3期53卷 132-133页

作者：张智伟王博伟朱子瑞冀卫东上海海湾新能风力发电有限公司上海200433 江苏金风科技有限公司江苏214000

阐述一种基于振动监测的海上风机基础冲刷监测系统,系统采用低频振动信号来反映基础冲刷的动态特性,实现对风机基础冲刷破坏的在线监测,并根据测量结果及时做出预警。

关键词：监测系统低频振动海上风电

Multi-scenario land use prediction and layout optimization in Nanjing Metropolitan Area based on the PLUS model

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Journal of Geographical Sciences 2024年第7期34卷 1415-1436页

作者： CAO ji CAO weidong CAO Yuhong WANG Xuewei ZHANG Yizhen MA jinji School of Geography and Tourism Anhui Normal UniversityWuhuAnhui241002China School of Ecology and Environment Anhui Normal UniversityWuhuAnhui241002China

The metropolitan area is a crucial spatial element in promoting new urbanization in *** possesses theoretical and empirical value in the determination of the evolutionary patterns and development trends necessary for regional integration and high-quality *** study focused on Nanjing Metropolitan Area,the first national metropolitan area in China,and established three development scenarios by combining ecological–economic spatial conflict(EESC)zones and national key ecological functional *** scenarios simulate the spatial distribution of future land use and land cover change(LUCC)using the development zone planning function of the patch generation land use simulation(PLUS)*** results show that:(1)Between 2000 and 2020,the most prominent characteristics of land use change were largely the massive expansion of built-up land and the significant decline of farmland,while changes in the area of ecological land were less evident.(2)EESC areas experienced significant changes over the past 20 years,but the overall level of conflict was *** land was the main land use type in the lowest-conflict area,while built-up land was the main land use type in the highest-conflict area.(3)From 2030 to 2050,further expansion of built-up areas is expected,with continued decrease of *** regulation of these land use changes can be achieved through different development zone *** economic development scenario had the largest built-up land area,while the ecological protection scenario had the largest farmland *** study simulates the spatial pattern changes in the metropolitan area based on spatial conflict patterns and national main functional area planning process,providing a scientific reference for future spatial planning and management.

关键词： land use change spatial conflict patch-generating simulation land use prediction Nanjing Metropolitan Area

Chlorfenapyr poisoning:mechanisms,clinical presentations,and treatment strategies

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World Journal of Emergency Medicine 2024年第3期15卷 214-219页

作者： ji Cheng Yulu Chen weidong Wang Xueqi Zhu Zhenluo jiang Peng Liu Liwen Du Emergency Department Ningbo No.2 HospitalNingbo 315010China

BACKGROUND:Chlorfenapyr is used to kill insects that are resistant to organophosphorus *** poisoning has a high mortality rate and is difficult to *** article aims to review the mechanisms,clinical presentations,and treatment strategies for chlorfenapyr *** RESOURCES:We conducted a review of the literature using PubMed,Web of Science,and SpringerLink from their beginnings to the end of October *** inclusion criteria were systematic reviews,clinical guidelines,retrospective studies,and case reports on chlorfenapyr poisoning that focused on its mechanisms,clinical presentations,and treatment *** references in the included studies were also examined to identify additional ***:We included 57 studies in this *** can be degraded into tralopyril,which is more toxic and reduces energy production by inhibiting the conversion of adenosine diphosphate to adenosine *** fever and altered mental status are characteristic clinical presentations of chlorfenapyr *** it occurs,respiratory failure occurs immediately,ultimately leading to cardiac arrest and *** poisoning is diflcult to treat,and there is no specific ***:Chlorfenapyr is a new pyrrole *** it has been identified as a moderately toxic pesticide by the World Health Organization(WHO),the mortality rate of poisoned patients is extremely *** is no specific antidote for chlorfenapyr ***,based on the literature review,future efforts to explore rapid and effective detoxification methods,reconstitute intracellular oxidative phosphorylation couplings,identify early biomarkers of chlorfenapyr poisoning,and block the conversion of chlorfenapyr to tralopyril may be helpful for emergency physicians in the diagnosis and treatment of this disease.

关键词： Chlorfenapyr poisoning Mechanism Clinical presentation Treatment

Spatial and temporal variability of colored dissolved organic matter absorption properties in the Taiwan Strait

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Acta Oceanologica Sinica 2012年第5期31卷 98-106页

作者： LIN Hui GUO weidong HU Minghui LIN Cai ji weidong College of Ocean and Earth Sciences Xiamen UniversityXiamen 361005China Third Institute of Oceanography State Oceanic AdministrationXiamen 361005China

Spatial and temporal variability of the absorption properties of colored dissolved organic matter （CDOM） in the Taiwan Strait was investigated in summer （July to August of 2006） and winter （from December 2006 to January of 2007） seasons. The CDOM absorption coefficient at 280 nm （a 280 ） showed a decreasing trend from nearshore to offshore areas while the spectral slope coefficient parameter calculated between wavelengths 275–295 nm （S 275 295 ） showed an increase, indicative of decreasing aromaticity and molecular weight of the CDOM. The average a 280 in winter （1.47 ± 0.50 m ^-1 ） was significantly higher than in summer （1.10 ± 0.41 m ^-1 ）, while the average S 275 295 in winter （26.7 ± 5.2 μm^- 1 ） was significantly lower than in summer （30.6 ± 5.5 μm^- 1 ）, demonstrating clear seasonal variation in CDOM abundance and properties in the Taiwan Strait. A three-end- member conservative mixing model showed that local terrestrial CDOM inputs from several rivers along the western coast were small （〈5%）. However, the distribution of CDOM in the Taiwan Strait is mainly controlled by water mass movement [i.e., the Zhe-min Coastal Current （ZCC） and the Kuroshio Branch Current （KBC） in winter and the South China Sea Water （SCSW） in summer]. Biological activity was also an important factor affecting the distribution of CDOM in the offshore region in summer months.

关键词： colored dissolved organic matter absorption properties seasonal variation hydrology Taiwan Strait

The Mechanism of Cortico-Striato-Thalamo-Cortical Neurocircuitry in Response Inhibition and Emotional Responding in Attention Deficit Hyperactivity Disorder with Comorbid Disruptive Behavior Disorder

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Neuroscience Bulletin 2018年第3期34卷 566-572页

作者： Yuncheng Zhu Xixi jiang weidong ji Shanghai Changning Mental Health Center Affiliated Greenland Hospital of BIO-X Institute Shanghai Jiao Tong University

The neurocircuitries that constitute the corticostriato-thalamo-cortical（CSTC） circuit provide a framework for bridging gaps between neuroscience and executive function in attention deficit hyperactivity disorder（ADHD）, but it has been difficult to identify the mechanisms for regulating emotional problems from the understanding of ADHD comorbidity with disruptive behavior disorders（DBD）. Research based on ＂cool＇＇ and ＂hot＇＇executive functional theory and the dual pathway models,which are thought of as applied response inhibition and delay aversion, respectively, within the neuropsychological view of ADHD, has shed light on emotional responding before and after decontextualized stimuli, while CSTC circuit-related domains have been suggested to explain the different emotional symptoms of ADHD with or without comorbid DBD. This review discusses the role of abnormal connections in each CSTC circuit, especially in the emotion circuit, which may be responsible for targeted executive dysfunction at the neuroscience level. Thus, the two major domains – abstract thinking（cool） and emotional trait（hot） – trigger the mechanism of onset of ADHD.

关键词： Attention deficit hyperactivity disorder Disruptive behavior disorder Emotion Executive function