检索结果-南通市图书馆

基于改进神经网络的小型鱼塘水质检测仪设计与实现

在线全文

学校读者我要写书评

暂无评论

自动化与仪器仪表 2024年第4期 235-238,243页

作者：田崇峰陆红飞田恺潘维李国晓江苏农林职业技术学院江苏句容212400 中通服咨询设计研究院有限公司南京210019

为提高小型鱼塘水质分析的准确率,提出一种基于BP神经网络的水质分析方法。该方法首先根据淡水养殖生物在不同水质的水体中的生长状况制定了水质等级评定标准,再利用LM算法改进的BP神经网络进行水质等级分析,并通过高斯隶属度衡量不同... 详细信息

为提高小型鱼塘水质分析的准确率,提出一种基于BP神经网络的水质分析方法。该方法首先根据淡水养殖生物在不同水质的水体中的生长状况制定了水质等级评定标准,再利用LM算法改进的BP神经网络进行水质等级分析,并通过高斯隶属度衡量不同样本水质间的相似度,降低水质状况的模糊性和不确定性对水质等级评定的影响。仿真实验证明,改进BP神经网络的水质分类准确率可达99.3%,网络训练时长仅为4.967 s,具有较快的训练速度和等级分类性能;搭建水质硬件分析系统及应用表明,该方法对小型鱼塘水体水质的等级评定结果整体偏优,基本满足小型鱼塘水质状况的初步分析需求。

关键词： LM算法 BP神经网络水质分析

Spatial-temporal shifting patterns and in situ conservation of spotted seal(Phoca largha)populations in the Yellow Sea ecoregion

在线全文

学校读者我要写书评

暂无评论

Integrative Zoology 2024年第2期19卷 307-318页

作者： hongfei ZHUANG Fei SHAO Chao ZHANG Wancai XIA Shouqiang WANG Fangyuan QU Zongling WANG Zhichuang lu Linlin ZHAO Zhaohui ZHANG First Institute of Oceanography Ministry of Natural ResourcesQingdaoChina Department of Natural Resources of Shandong Province Shandong Forestry Protection and Development Service CenterJinanChina National Park(Protected Areas)Development Center National Forestry and Grassland AdministrationBeijingChina College of Life Science China West Normal UniversityNanchongChina Liaoning Ocean and Fisheries Science Research Institute DalianChina

Understanding the habitat shifting pattern is a prerequisite for implementing in situ conservation of migratory *** seals(Phoca largha)inhabiting the Yellow Sea ecoregion(YSE)comprise a small population with independent genes and represent a charismatic flagship species in this ***,this population has declined by 80%since the 1940s,and increased support from the countries around the YSE is urgently needed to address the potential local extinction risk.A time-series niche model and life-history weighted systematic conservation planning were designed on the basis of a satellite beacon tracking survey(2010–2020)of the YSE *** results showed clustering and spreading shifting patterns during the breeding and migratory seasons,*** closed-loop migration route formed in the YSE indicated that this population might be geographically isolated from populations in other breeding areas around the *** conservation priority area(CPA),with an area of 19632 km^(2)(3.58%of the total YSE area),was the most effective response to the potential in situ ***,nearly 80%of the CPA was exposed outside the existing marine protected areas(MPAs).Future establishment of MPAs in China should strategically consider the conservation gap identified herein,and it is recommended for Korea’s closed fishing season to be spatially set in the western Korean Peninsula from May to *** study also exemplified that the lack of temporal information would lead to the dislocation of niche modeling for migratory species represented by spotted *** should be paid to protecting small and migratory populations in marine biodiversity conservation planning.

关键词： conservation priority area marine protected area migration seasonal management spotted seal

Boosting the cycling stability of all-solid-state lithium metal batteries through MOF-based polymeric protective layers

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第8期95卷 511-518,I0011页

作者： hongfei Bao Diancheng Chen Jiaqi Cao Pengfeng Jiang Kaili Li Runtao Liu Yuling Zhao Yichun Zheng Beiqi Liao Yaming Zhang Xia lu Yang Sun School of Materials Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107GuangdongChina

Solid-state electrolytes(SSEs)play a pivotal role in advancing next-generation lithium metal battery ***,they commonly encounter substantial interfacial resistance and poor stability when interfacing with lithium metal,hindering practical ***,we introduce a flexible metal-organic framework(MOF:NUS-6)-incorporated polymeric layer,denoted as NP,designed to protect the sodium superionic conductor(NASICON)-type Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP)electrolyte from Li metal *** NP matrix establishes a soft interface with the LATP surface,effectively reducing voids and gaps that may arise between the LATP electrolyte and Li ***,the MOF component in NP enhances ionic conductivity,offers abundant Li^(+)transport sites,and provides hierarchical ion channels,ensuring a homogeneous Li^(+)flow and thus effectively inhibiting Li dendrite *** NP,we fabricate Li symmetrical cells cycled for over 1600 h at 0.2 mA cm^(-2)and all-solid-state LiINP-LATPI LiFePO_(4)batteries,achieving a remarkable 99.3%capacity retention after 200 cycles at 0.2 *** work outlines a general strategy for designing long-lasting and stable solid-state Li metal batteries.

关键词： All-solid-state Li metal battery MOF-based polymeric layer Li dendrite Interfacial contact LATP electrolyte stability

Efficacy of glyphosate applications for control of an invasive weed, Eupatorium adenoporum

在线全文

学校读者我要写书评

暂无评论

Efficacy of glyphosate applications for control of an invasi...

基于嘌呤席夫碱荧光探针检测Al^(3+)及细胞实验应用

生态文明建设中的植物学：现在与未来——中国植物学会第十五届会员代表大会暨八十周年学术年会

作者： Bo JIANG Jianli HUANG Zonggen SHEN hongfei lu College of Life science Zhejiang Sci-Tech University College of Biology and Food Engineering Changshu Institute of Technology

Eupatorium adenoporum, a worldwide noxious invasive weed, is an erect perennial herb native to Mexico and Costa Rica of Central America. Because of its stress tolerance, large number of cypselas and marked ability to regenerate from stems and roots;it has spread over large areas of the world. The study showed that glyphosate application has severe and progressive effect on E. adenoporum. depending on the concentration and time of application. The analysis of chlorophyll fluorescence and photosynthesis revealed that glyphosate significantly decreased the chlorophyll content, P N , Yield, ETR, qP and NPQ. The SOD activity increased at first time and then decreased with the glyphosate concentration increased. The shikimic acid content of this weed witch treated with different concentrations of glyphosate increased with the increase of glyphosate concentration, the tryptophan content has the reversed tends. Our results showed that the glyphosate influence the shikimic acid pathway of plant. It is proposed that an herbicide concentration largely exceeding the recommended field concentration was used to effectively control this invasive weed.

关键词： Eupatorium adenoporum. glyphosate photosynthesis, chlorophyll fluorescence, proline, shikimic acid, tryptophan content

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

有机化学 2022年第6期42卷 1706-1712页

作者：鞠立鑫邵琦陆临川陆鸿飞江苏科技大学环境与化学工程学院江苏镇江212100

基于嘌呤母体的席夫碱,设计合成并评价了一种新型的检测Al^(3+)的开启式荧光探针(E)-2-((2-(8,9-二(萘-1-基)-9H-嘌呤-6-基)腙)甲基)-5-(二乙氨基)苯酚(DNHP).DNHP在MeOH/H_(2)O(V∶V=9∶1,pH=7.4)中对Al^(3+)表现出显著的选择性和快速响应,并且伴随着从淡黄色到亮蓝色的荧光颜色变化.DNHP的发射强度与Al^(3+)的浓度(2~6μmol/L)之间存在良好的线性关系(R^(2)=0.98367),最低检出限为588.0 nmol/L.利用Job’s plot、1H NMR和密度泛函理论(DFT)研究证明了DNHP对Al^(3+)的传感机理.更重要的是,DNHP表现出细胞渗透性,并被成功应用于存活的HepG-2细胞内对铝离子的检测.

关键词：荧光传感器嘌呤铝实际应用

在线全文

学校读者我要写书评

暂无评论

旱涝交替胁迫对水稻分蘖期根解剖结构的影响

农业工程学报 2015年第9期31卷 107-113页

作者：甄博郭相平陆红飞中国农业科学院农田灌溉研究所新乡453002 河海大学水利水电学院南京210098

通过盆栽试验,研究了水稻分蘖期旱-涝-旱交替胁迫对根解剖结构的影响。本试验主要通过不同程度的旱胁迫(重旱,A1和轻旱,A2)和重涝胁迫(保持15 cm水层,B)分3个阶段交替进行,分析各个阶段水稻根的中柱、通气组织、根外层细胞发育及根外层... 详细信息

通过盆栽试验,研究了水稻分蘖期旱-涝-旱交替胁迫对根解剖结构的影响。本试验主要通过不同程度的旱胁迫(重旱,A1和轻旱,A2)和重涝胁迫(保持15 cm水层,B)分3个阶段交替进行,分析各个阶段水稻根的中柱、通气组织、根外层细胞发育及根外层厚度与常规灌溉之间的差异,探讨旱-涝-旱交替胁迫对水稻抗涝性的影响。结果表明,第Ⅰ阶段干旱胁迫(A1和A2处理)能促使根形成发达的通气组织,且形成时间早于常规灌溉(C),A1和A2处理根外层厚度显著高于C处理。第Ⅰ阶段重旱胁迫对第Ⅱ阶段涝胁迫(重旱-重涝处理,A1B)根解剖结构产生明显的影响,A1B处理通气组织较早形成,其导管直径、总面积和中柱面积分别较常规灌溉(CC)增加了43.3%、52.8%、76.5%,而第Ⅱ阶段淹涝条件下(常规灌溉-重涝处理,CB)根仅形成了少量的通气组织。第Ⅲ阶段涝胁迫后再经历旱胁迫(重旱-重涝-重旱处理,A1BA1和轻旱-重涝-轻旱处理,A2BA2),根解剖结构表现与第Ⅰ阶段旱胁迫相似。可见,短期旱胁迫可促进根系通气组织的发育,而不会造成水稻耐涝能力的降低。该研究可为水稻蓄水控灌技术提供理论依据。

关键词：胁迫干旱细胞水稻旱涝交替胁迫分蘖期根解剖结构

Ultrastructure of the Multicellular Nodules in Hypericum perforatum Leaves

在线全文

学校读者我要写书评

暂无评论

Acta Botanica Sinica 2002年第6期44卷 649-656页

作者：刘文哲吕洪飞胡正海西北大学生命科学学院西安710069

With the development of the multicellular nodules in the leaves of Hypericum per plastids increased both in number and volume, and some plastids degenerated and were surrounded by dark tubular elements and vesicles. Some vesicles fused with vacuoles and secreted substances into vacuoles. There are many multivesicles, multimembrane structures and osmiophilic droplets in vacuoles of nodule cells. Meanwhile, dictyosome secreted vesicles into the vacuoles. However, there is a large central vacuole completely filled with secretory materials (hypericin) in matured multicellular nodules. This suggests that the osmiophilic droplets may be a precursor of hypericin originated from the degenerated plastids. There were abundant endoplasmic reticulums and dictyosomes between the plastids and osmiophilic droplets, suggesting that they may be involved in the synthesis and/or transport of the precursor of hypericin.

关键词： Hypericum perforatum multicellular nodules ultrastructure hypericin

在线全文

学校读者我要写书评

暂无评论

突变理论在深水钻井安全状态分析中的应用

中国科技论文 2018年第21期13卷 2424-2429页

作者：刘刚王航卢鸿飞中国石油大学(华东)石油工程学院山东青岛266580

本文将深水钻井施工过程作为一个系统,利用突变理论分析深水钻井过程的安全状态。首先建立深水钻井系统安全状态的评价指标体系,然后分析深水钻井系统的安全状态在2个控制变量的共同作用下由安全向风险和事故状态的演化过程,最后使用突... 详细信息

本文将深水钻井施工过程作为一个系统,利用突变理论分析深水钻井过程的安全状态。首先建立深水钻井系统安全状态的评价指标体系,然后分析深水钻井系统的安全状态在2个控制变量的共同作用下由安全向风险和事故状态的演化过程,最后使用突变级数评价法对南海某海域钻井作业的安全状态进行分析。结果表明,底层风险是层层向上传递的,并提出了改进该井安全状态的措施,验证了突变理论应用于深水钻井安全状态分析的可行性。

关键词：突变理论风险演化深水钻井安全分析

氨基脲催化下碳亲核试剂和氮亲核试剂对查尔酮的Michael加成反应

在线全文

学校读者我要写书评

暂无评论

有机化学 2014年第10期34卷 2083-2089页

作者：程贺龙高玉华聂士鹏陆鸿飞江苏科技大学生物与化学工程学院镇江212003

以查尔酮、丙二酸酯、丙二腈、苯胺为原料,水为溶剂,苯丙氨酸脲化合物为催化剂,三氟甲磺酸为助剂60℃下反应,高产率得到Michael加成产物.该方法具有催化剂合成简单、环境友好等优点.

关键词：查尔酮丙二酸酯苯丙氨酸脲化合物 Michael加成