检索结果-南通市图书馆

Molecular phylogeny and taxonomy of Phlomoides(Lamiaceae subfamily Lamioideae)in China:Insights from molecular and morphological data

引用

Plant Diversity 2024年第4期46卷 462-475页

作者： Yue Zhao Ya-Ping Chen Bryan T.Drew fei Zhao Maryam Almasi Orzimat T.Turginov jin-fei xiao Abdul G.Karimi Yasaman Salmaki Xiang-Qin Yu Chun-Lei Xiang CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201YunnanChina Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau&Inner Mongolia Key Laboratory of Grassland Ecology School of Ecology and EnvironmentInner Mongolia UniversityHohhot 010000Inner MongoliaChina Department of Biology University of Nebraska at KearneyKearneyNE 68849USA CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization&Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province Chinese Academy of SciencesChengdu Institute of BiologyChengdu 610042SichuanChina Center of Excellence in Phylogeny of Living Organisms Department of Plant ScienceCollege of ScienceUniversity of TehranP.O.Box 14155-6455TehranIran Institute of Botany Academy of Sciences of the Republic of UzbekistanTashkent 100047Uzbekistan Faculty of Biology Department of Botany and Plant PhysiologyNational University of Uzbekistan named after Mirzo UlugbekTashkent 100174Uzbekistan Faculty of Pharmacy Kabul University1006 KabulAfghanistan

Phlomoides,with 150-170 species,is the second largest and perhaps most taxonomically challenging genus within the subfamily Lamioideae(Lamiaceae).With about 60 species,China is one of three major biodiversity centers of *** some Phlomoides species from China have been included in previous molecular phylogenetic studies,a robust and broad phylogeny of this lineage has yet to be ***,given the myriad new additions to the genus,the existing infrageneric classification needs to be evaluated and ***,we combine molecular and morphological data to investigate relationships within Phlomoides,with a focus on Chinese *** observed that plastid DNA sequences can resolve relationships within Phlomoides better than nuclear ribosomal internal and external transcribed spacer regions(nrITS and nrETS).Molecular phylogenetic analyses confirm the monophyly of Phlomoides,but most previously defined infrageneric groups are not *** addition,morphological analysis demonstrates the significant taxonomic value of eight characters to the *** on our molecular phylogenetic analyses and morphological data,we establish a novel section Notochaete within Phlomoides,and propose three new combinations as well as three new *** study presents the first molecular phylogenetic analyses of Phlomoides in which taxa representative of the entire genus are included,and highlights the phylogenetic and taxonomic value of several morphological characters from species of Phlomoides from *** study suggests that a taxonomic revision and reclassification for the entire genus is necessary in the future.

关键词： Lamioideae Molecular phylogenetics Morphology Phlomideae Taxonomy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于YOLOv7算法的易涝区积水快速识别方法研究

引用

中国给水排水 2024年第9期40卷 123-128页

作者：金晓飞郭帅黄琼袁伟合肥工业大学土木与水利工程学院安徽合肥230009 安徽省职业技术学院智能制造学院安徽合肥230011 合肥市测绘设计研究院有限公司安徽合肥230061

为了能够高效便捷地监测识别城市易涝区积水情况,利用深度学习技术,提出了一种基于YOLOv7算法的快速识别积水方法。采用传统数据增强和Mosaic数据增强方法对训练集图像进行扩充,构建了YOLOv7积水检测模型,并与其他主流目标检测模型Faste... 详细信息

为了能够高效便捷地监测识别城市易涝区积水情况,利用深度学习技术,提出了一种基于YOLOv7算法的快速识别积水方法。采用传统数据增强和Mosaic数据增强方法对训练集图像进行扩充,构建了YOLOv7积水检测模型,并与其他主流目标检测模型Faster R-CNN和YOLOv5m进行了对比分析。结果表明,YOLOv7模型取得了最好的效果,其精度、召回率、平均精度、F_(1)分数分别达到了92.9%、83.4%、88.8%和87.9%,且单张图片推理时间仅约为0.025 s。该方法在城市内涝积水识别与预警方面具有良好的应用前景。

关键词：城市内涝积水识别目标检测 YOLOv7算法深度学习

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

“秩边透水道”针法对早发性卵巢功能不全大鼠SIRT1/PGC-1α/Nrf2信号通路的影响

引用

针刺研究 2024年第9期49卷 933-942页

作者：殷陆芸冯慧敏邱芳闫婧金晓飞山西中医药大学第二临床学院山西晋中030619

目的:观察“秩边透水道”针法对早发性卵巢功能不全(POI)大鼠沉默信息调节因子1(SIRT1)/过氧化物酶体增殖物激活受体-γ辅激活因子1α(PGC-1α)/核因子E2相关因子2(Nrf2)信号通路的影响,探讨“秩边透水道”针法治疗POI的氧化应激机制。... 详细信息

目的:观察“秩边透水道”针法对早发性卵巢功能不全(POI)大鼠沉默信息调节因子1(SIRT1)/过氧化物酶体增殖物激活受体-γ辅激活因子1α(PGC-1α)/核因子E2相关因子2(Nrf2)信号通路的影响,探讨“秩边透水道”针法治疗POI的氧化应激机制。方法:随机将48只SD雌性大鼠平均分为空白组、模型组、浅刺组和秩边透水道组,每组12只。采用腹腔注射环磷酰胺制备POI大鼠模型。模型建立后,浅刺组采用0.20 mm×13 mm不锈钢毫针针刺大鼠双侧“秩边”,秩边透水道组采用0.20 mm×25 mm不锈钢毫针针刺大鼠双侧“秩边”并透向同侧“水道”,均每次30 min,每日1次,6次/周,连续4周。治疗结束后,ELISA法检测大鼠血清促卵泡激素(FSH)、黄体生成素(LH)、雌二醇(E2)和抗米勒管激素(AMH)含量;采用比色法检测卵巢组织超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、丙二醛(MDA)含量;HE染色法观察大鼠卵巢组织形态的变化并计算卵泡数目;免疫组织化学法、Western blot法检测大鼠卵巢组织SIRT1、PGC-1α、Nrf2蛋白表达;实时荧光定量PCR法检测大鼠卵巢组织中SIRT1、PGC-1α、Nrf2 mRNA表达。结果:造模结束后,除空白组外,其余大鼠动情周期均紊乱,且FSH、LH含量较空白组升高(P<0.01),E2含量降低(P<0.01),提示造模成功。干预后,与空白组比较,模型组大鼠血清FSH、LH含量升高(P<0.01),E2、AMH含量降低(P<0.01),卵巢组织SOD、CAT活性降低(P<0.01),MDA含量升高(P<0.01),生长卵泡数目减少(P<0.01),闭锁卵泡数目增加(P<0.01),SIRT1、PGC-1α、Nrf2蛋白和mRNA表达水平均降低(P<0.01,P<0.05)。相较于模型组,两针刺组大鼠血清FSH、LH含量降低(P<0.01),E2、AMH含量升高(P<0.01);秩边透水道组卵巢组织SOD、CAT活性上升(P<0.05)、MDA含量下降(P<0.01),生长卵泡数目增加(P<0.01),闭锁卵泡数目减少(P<0.01),SIRT1、PGC-1α、Nrf2蛋白及mRNA表达水平均上升(P<0.01,P<0.05)。与浅刺组比较,秩边透水道组大鼠血清AMH含量升高(P<0.01),卵巢组织SOD、CAT活性上升(P<0.05),MDA含量下降(P<0.05),生长卵泡数目增加(P<0.05),闭锁卵泡数目减少(P<0.05),SIRT1、PGC-1α、Nrf2蛋白及mRNA表达水平均升高(P<0.05)。结论:“秩边透水道”针法可以改善POI大鼠血清性激素水平及卵巢氧化应激水平,进而改善POI大鼠卵巢功能,其作用机制可能与SIRT1/PGC-1α/Nrf2信号通路的激活有关。

关键词：早发性卵巢功能不全秩边透水道氧化应激 SIRT1/PGC-1α/Nrf2信号通路

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

补阳还五汤对脑缺血再灌注大鼠线粒体氧化损伤和PKCε-Nampt通路的影响

引用

中成药 2024年第1期46卷 79-86页

作者：尹美娟刘真一靳晓飞周晓红高钰赵月眸高维娟河北中医学院河北省心脑血管病中医药防治研究重点实验室河北石家庄050091

目的探讨补阳还五汤对脑缺血再灌注(I/R)大鼠线粒体氧化损伤及PKCε-Nampt通路的影响。方法大鼠随机分为假手术组、模型组、补阳还五汤组(14.3 g/kg)和依达拉奉组(3 mg/kg),除假手术组外均采用MCAO法建立脑I/R损伤模型,术后24 h各组给... 详细信息

目的探讨补阳还五汤对脑缺血再灌注(I/R)大鼠线粒体氧化损伤及PKCε-Nampt通路的影响。方法大鼠随机分为假手术组、模型组、补阳还五汤组(14.3 g/kg)和依达拉奉组(3 mg/kg),除假手术组外均采用MCAO法建立脑I/R损伤模型,术后24 h各组给予相应剂量药物,给药7 d后通过神经功能评分评估神经功能缺损情况,免疫荧光检测神经元标志物MAP-2表达,观察神经元损伤情况,检测ROS、MDA水平和SOD活性评价氧化损伤情况,荧光探针JC-1检测线粒体膜电位变化,修饰酶循环法检测NAD^(+)/NADH比值,Western blot法检测PKCε、p-PKCε、Nampt蛋白表达,免疫组化法检测p-PKCε、Nampt蛋白阳性表达。结果与模型组比较,补阳还五汤组脑梗死体积、神经功能评分降低(P<0.05),脑组织MAP-2荧光强度增强(P<0.05),神经元损伤减轻,脑组织ROS、MDA水平降低(P<0.05),SOD活性、线粒体膜电位、NAD^(+)/NADH比值升高(P<0.05),p-PKCε、Nampt蛋白表达升高(P<0.05)。结论补阳还五汤可通过激活PKCε-Nampt信号通路、提高线粒体功能来减轻大鼠脑I/R损伤。

关键词：补阳还五汤脑缺血再灌注损伤线粒体 PKCε Nampt

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

防己有效成分通过抑制氧化应激反应减轻大鼠蛛网膜下腔出血后早期脑损伤的研究

引用

河北中医药学报 2024年第3期39卷 1-5,16页

作者：冯智丽靳晓飞高维娟钱涛承德医学院河北承德067000 河北中医药大学石家庄050091 河北省人民医院石家庄050061

目的:探讨中药防己有效成分—粉防己碱(tetrandrine,Tet)改善大鼠蛛网膜下腔出血(subarachnoid hemorrhage,SAH)后早期脑损伤(early brain injury,EBI)的氧化应激反应的作用机制。方法:36只雄性SD大鼠随机分为假手术组(Sham组)、模型组(... 详细信息

目的:探讨中药防己有效成分—粉防己碱(tetrandrine,Tet)改善大鼠蛛网膜下腔出血(subarachnoid hemorrhage,SAH)后早期脑损伤(early brain injury,EBI)的氧化应激反应的作用机制。方法:36只雄性SD大鼠随机分为假手术组(Sham组)、模型组(Model组)、粉防己碱组(Tet组),颅内血管内穿刺法建立SAH模型,Tet组术后腹腔注射Tet(20 mg/kg)。测定各组SAH出血量评分、神经功能缺陷评分和脑含水量。尼氏染色和HE染色观察脑皮质区神经元的形态和数量,透射电镜观察脑组织线粒体结构变化。生化法检测活性氧(ROS)、丙二醛(MDA)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)的含量。结果:与Sham组相比,Model组镜下脑组织损伤加重,脑含水量、ROS和MDA水平升高,神经功能缺陷评分、SOD、GSH-Px水平降低(P<0.05);相较Model组,Tet组镜下脑组织损伤减轻,脑含水量、ROS和MDA水平降低,神经功能缺陷评分、SOD、GSH-Px水平升高(P<0.05)。结论:中药防己有效成分—Tet可以抑制氧化应激反应,对大鼠SAH后早期脑损伤发挥保护作用。

关键词：防己粉防己碱氧化应激早期脑损伤蛛网膜下腔出血

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Surface Polarization Effects on Collapse Transition of Polyelectrolyte Brushes

引用

Chinese Journal of Polymer Science 2024年第9期42卷 1313-1320,I0006页

作者： xiao-fei Xu State Key Laboratory of Chemical Engineering and School of Chemical Engineering East China University of Science and TechnologyShanghai200237China

Polyelectrolyte brushes(PEBs)are commonly used to modify surface that have attracted great research *** dielectric permittivity of the grafted surface is typically significantly different from that of solution,which results in surface polarization(SP)effect with a jump of electric *** is thus important to study how SP alters the PEB’s structure and *** this work,the SP effects on PEB structure was studied using a statistical thermodynamic *** free energy functional to describe SP effect was constructed by using the image-charge ***,the electrostatic potential was solved from a modified Poisson-Boltzmann equation taking the ion solvation effect into *** the absence of SP,the thickness of PEB exhibited a continuous collapse transition when decreasing the solvent *** the presence of SP,the collapse became a jump-like *** energy analysis showed that the long-range Coulombic interaction dominated the transition because of the enhanced counterion condensation in the presence of *** theory provides an effective tool to study SP effect on PEBs,and the results explain the underlying physics in PEB collapse transition.

关键词： Surface polarization Polyelectrolyte brush Image charge Ion solvation Polyelectrolyte collapse transition

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Even Search in a Promising Region for Constrained Multi-Objective Optimization

引用

IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 474-486页

作者： fei Ming Wenyin Gong Yaochu jin School of Computer Science China University of GeosciencesWuhan 430074China IEEE Faculty of Technology Bielefeld UniversityNorth Rhine-Westphalia 33619Germany School of Engineering Westlake UniversityHangzhou 310030China

In recent years, a large number of approaches to constrained multi-objective optimization problems(CMOPs) have been proposed, focusing on developing tweaked strategies and techniques for handling constraints. However, an overly finetuned strategy or technique might overfit some problem types,resulting in a lack of versatility. In this article, we propose a generic search strategy that performs an even search in a promising region. The promising region, determined by obtained feasible non-dominated solutions, possesses two general ***, the constrained Pareto front(CPF) is included in the promising region. Second, as the number of feasible solutions increases or the convergence performance(i.e., approximation to the CPF) of these solutions improves, the promising region shrinks. Then we develop a new strategy named even search,which utilizes the non-dominated solutions to accelerate convergence and escape from local optima, and the feasible solutions under a constraint relaxation condition to exploit and detect feasible regions. Finally, a diversity measure is adopted to make sure that the individuals in the population evenly cover the valuable areas in the promising region. Experimental results on 45 instances from four benchmark test suites and 14 real-world CMOPs have demonstrated that searching evenly in the promising region can achieve competitive performance and excellent versatility compared to 11 most state-of-the-art methods tailored for CMOPs.

关键词： Constrained multi-objective optimization even search evolutionary algorithms promising region real-world problems

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Solidification behaviour and hot cracking susceptibility of a novel Ni-based superalloy

引用

Journal of Iron and Steel Research International 2024年第4期31卷 956-966页

作者： Yue Chen Shao-min Lv Xing-fei Xie xiao-can Wen Jng-long Qu jin-hui Du High-Temperature Materials Institute China Iron and Steel Research Institute Group Co.Ltd.Beijing 100081China Beijing GAONA Materials and Technology Co. Ltd.Beijing 100081China Sichuan CISRI-GAONA Forging Co. Ltd.Deyang 610000SichuanChina

A novel Ni-based superalloy GH4151,with a γ′ volume fraction of about 55%and a service temperature capability up to 8oo oC,was *** to the different cooling conditions of various regions during the solidification of ingots,significant cooling rate variations may lead to the occurrence of hot *** scanning laser microscope was utilised to investigate the solidification process and phase precipitation behaviour of the GH4151 under wide range cooling *** characteristics of L→γ transformation were analysed,and the growth rates of at each stage were *** segregation behaviour was predicted using the Scheil equation,and the predicted results match well with the experimental *** sensitivity coefficient for hot cracking was modified,and cracking sensitivity coefficient values for the alloy under different cooling rates were computed,revealing that the alloy is most susceptible to hot cracking at 10℃/min cooling ***,controlling the cooling rate can reduce the possibility of hot cracking in ingot.

关键词： Ni-based superalloy Solidification behaviour In-situ observation Clyne and Davies's criterion:Hot cracking susceptibility

来源：

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

Acoustic characterization of hydrate formation and decomposition in clay-bearing sediments

引用

Petroleum Science 2024年第4期21卷 2830-2838页

作者： Yi-Jian Zhu xiao-Mei Yang Xing Huang Hao Li xiao-Hui Wang Yi-fei Sun Peng xiao Chang-Yu Sun Guang-jin Chen State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and Environment China University of Petroleum

Understanding the acoustic characteristics of hydrates in various sediments is crucial for hydrate resource detection and safe and efficient exploitation, as hydrate occurrence patterns vary greatly in different sediments. In this work, sediments with different bentonite contents, water saturations, and types were prepared to investigate the characteristics of P-wave velocity(reflecting the magnitude of hydrate saturation in the sediment) and amplitude(reflecting the degree of hydrate-sediment cementation) during hydrate formation and depressurization. During hydrate formation, the P-wave velocity and amplitude have similar trends. As clay content increases, the P-wave velocity increase rates quickened. On the other hand, the increased rate of P-wave velocity slows down with the increase of water saturation in the clay-bearing sediments. Comparing various types of sediment shows that the water absorption and swelling of bentonite reduce the pore space, speeding up the cementation of the hydrate with the sediment and increasing P-wave velocity at a faster rate. Correspondence between P-wave velocity and hydrate saturation is strongly related to sediment type, clay content, and water *** rapidly decreasing amplitude in the early stage of hydrate depressurization indicates that hydrate in clay-bearing sediments is weakly cemented to the sediments, which is prone to stratigraphic *** findings of this study offer guidance for hydrate resource assessments in clay-bearing sediments as well as geologic risk estimations during hydrate mining.

关键词： Gas hydrate Bentonite Illite P-wave velocity Amplitude

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

An efficient parallel algorithm of variational nodal method for heterogeneous neutron transport problems

引用

Nuclear Science and Techniques 2024年第4期35卷 29-45页

作者： Han Yin xiao-jing Liu Teng-fei Zhang School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 2002040China

The heterogeneous variational nodal method(HVNM)has emerged as a potential approach for solving high-fidelity neutron transport ***,achieving accurate results with HVNM in large-scale problems using high-fidelity models has been challenging due to the prohibitive computational *** paper presents an efficient parallel algorithm tailored for HVNM based on the Message Passing Interface *** algorithm evenly distributes the response matrix sets among processors during the matrix formation process,thus enabling independent construction without *** the formation tasks are completed,a collective operation merges and shares the matrix sets among the *** the solution process,the problem domain is decomposed into subdomains assigned to specific processors,and the red-black Gauss-Seidel iteration is employed within each subdomain to solve the response matrix ***-to-point communication is conducted between adjacent subdomains to exchange data along the *** accuracy and efficiency of the parallel algorithm are verified using the KAIST and JRR-3 test *** results obtained with multiple processors agree well with those obtained from Monte Carlo *** parallelization of HVNM results in eigenvalue errors of 31 pcm/-90 pcm and fission rate RMS errors of 1.22%/0.66%,respectively,for the 3D KAIST problem and the 3D JRR-3 *** addition,the parallel algorithm significantly reduces computation time,with an efficiency of 68.51% using 36 processors in the KAIST problem and 77.14% using 144 processors in the JRR-3 problem.

关键词： Neutron transport Variational nodal method Parallelization KAIST JRR-3

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：