检索结果-南通市图书馆

Effects of β-Glucan Supplementation on Repairing of Phenol-Induced Vaginal Mucosal Epithelium Damage in Rats

Open Journal of Obstetrics and Gynecology 2024年第4期14卷 535-546页

作者： Song Fei Weidong Wu Ying wang Dan Li Bo jin Department of Thoracic and Cardiovascular Surgery Guangzhou Red Cross Hospital of Jinan University Guangzhou China Guangzhou Xiaomanyao Medical Equipment Co. Ltd. Guangzhou China

Objective: To investigate the effects of different concentrations of β-glucan on the repair of damaged vaginal mucosa, the expression of vascular endothelial growth factor (VEGF), and the inflammatory factor-6 (IL-6) in vaginal tissues. Methods: Thirty-six adult female specific pathogen free (SPF)-grade Wistar rats were randomly divided into 3 phase groups with 12 rats each. Vaginal inflammation rat models were established by injecting phenol gel into the vagina of each rat at a dose of 0.1 ml/100g body weight. After modeling, rats were divided into 4 groups based on different concentrations of the test agent. The control group was injected with 0.5 ml of saline, experimental group A was injected with 0.375 ml saline 0.125 ml β-glucan, experimental group B was injected with 0.25 ml saline 0.25 ml β-glucan, and experimental group C was injected with 0.50 ml β-glucan. The injection sites were selected at the 3 o’clock and 9 o’clock positions of the vagina. Rats were sacrificed at 7-, 14-, and 28-days post-injection, and tissue samples were collected from the injection sites and prepared for histological analysis. New blood vessels and fibroblast numbers in the tissues were observed after Hematoxylin-eosin (HE) staining. The expression levels of VEGF and IL-6 in the tissues were measured using quantificational reverse transcription polymerase chain reaction (qRT-PCR). Results: Histological examination of vaginal tissue specimens at 7-, 14-, and 28-days post-injection showed that on day 7, there were no significant changes in the experimental groups compared to the control group. However, on days 14 and 28, the experimental groups showed more new blood vessels, macrophages, and fibroblasts with increased activity compared to the control group. The expression levels of VEGF in vaginal tissues were elevated on days 14 and 28 in the experimental groups. The comparison of IL-6 levels in vaginal tissues on day 28 showed that serum IL-6 levels returned to normal, and there wa

关键词： β-Glucan Vaginal Mucosa Damage Repair

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

基于图卷积网络和注意力机制的谣言检测方法

引用

数据分析与知识发现 2024年第4期8卷 125-136页

作者：凤丽洲刘馥榕王友卫天津财经大学统计学院天津300222 中央财经大学信息学院北京100081

【目的】针对目前的谣言检测方法未能充分考虑评论间的转发关系特征和文本语义特征,提出一种基于图卷积网络和注意力机制的谣言检测方法。【方法】首先,对评论间转发和回复关系特征进行分析,构建评论关系特征图,充分挖掘评论间的关联特... 详细信息

【目的】针对目前的谣言检测方法未能充分考虑评论间的转发关系特征和文本语义特征,提出一种基于图卷积网络和注意力机制的谣言检测方法。【方法】首先,对评论间转发和回复关系特征进行分析,构建评论关系特征图,充分挖掘评论间的关联特性。然后,根据评论间的文本语义相似性,使用BERT模型生成句子的向量化表示并通过计算余弦相似度构建评论的语义特征图,充分提取评论的语义相关性。最后,基于图卷积网络完成不同节点之间的信息传递,并在各节点信息传输过程中使用注意力机制区分源评论和其他评论对谣言检测的影响,进而得到评论节点的准确表示。【结果】在公开数据集上进行实验,结果显示所提方法在Twitter15和Twitter16数据集上的准确率分别达到0.860和0.870,F1均值分别为0.858和0.866。与BiGCN方法相比,准确率分别提升了5.1%和1.5%,F1均值分别提升了5.0%和1.9%。【局限】仅使用文本数据进行谣言检测,未结合图片、用户属性及时间属性等特征。【结论】在公开数据集上进行应用,验证了所提方法可以有效地提升谣言检测性能,为谣言识别与检测任务提供有价值的参考。

关键词：图卷积网络注意力机制谣言检测 BERT模型

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

Recent progress and strategies of cathodes toward polysulfides shuttle restriction for lithium-sulfur batteries

引用

Rare Metals 2024年第9期43卷 4132-4161页

作者： Xing-You Rao Shuang-Fei Xiang Jian Zhou Zhen Zhang Xiang-Yu Xu Yuan-Yuan Xu Xin-Chi Zhou Zheng-Dao Pan Su-Chong Tan Shi-Xing dong Zhou-Lu wang Yu-Tong Wu Yun-Lei Zhou Xiang liu Yi Zhang Shan Jiang School of Energy Sciences and Engineering Nanjing Tech UniversityNanjing 211816China School of Materials Science and Engineering and Institute of Smart Fiber Materials Zhejiang Sci-Tech UniversityHangzhou 310018China JiangSu Sailboat Petrochemical Co. LtdLianyungang 222000China Hangzhou Institute of Technology Xidian UniversityHangzhou 311200China

Lithium-sulfur batteries(LSBs)have already developed into one of the most promising new-generation high-energy density electrochemical energy storage systems with outstanding features including high-energy density,low cost,and environmental ***,the development and commercialization path of LSBs still presents significant limitations and challenges,particularly the notorious shuttle effect triggered by soluble longchain lithium polysulfides(LiPSs),which inevitably leads to low utilization of cathode active sulfur and high battery capacity degradation,short cycle life,*** research efforts have been conducted to develop various sulfur host materials capable of effectively restricting the shuttle *** review firstly introduces the fundamental electrochemical aspects of LSBs,followed by a comprehensive analysis of the mechanism underlying the shuttle effect in Li–S batteries and its profound influence on various battery components as well as the overall battery ***,recent advances and strategies are systematically reviewed,including physical confinement,chemisorption,and catalytic conversion of sulfur hosts for restricting LiPSs shuttle *** interplay mechanisms of sulfur hosts and LiPSs are discussed in detail and the structural advantages of different host materials are ***,key insights for the rational design of advanced host materials for LSBs are provided,and the upcoming challenges and the prospects for sulfur host materials in lithium-sulfur batteries are also explored.

关键词： Lithium-sulfur batteries Polysulfides Shuttle effect Host

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

岛状多年冻土区高速铁路路基热状态及工程措施效果分析

引用

铁道学报 2024年第3期46卷 145-154页

作者：刘晓贺蔡德钩闫宏业张先军王斌刘浩中国铁道科学研究院研究生部北京100081 中国铁道科学研究院集团有限公司铁道建筑研究所北京100081 中国国家铁路集团有限公司工程管理中心北京100844 黑龙江铁路发展集团有限公司黑龙江哈尔滨150000

为揭示岛状多年冻土区高速铁路路基热状态,提出合理有效的制冷结构,在新建哈尔滨至伊春高速铁路某车站试验段开展现场监测,获得岛状多年冻土的地温数据;基于实测地温数据,采用冻土水热耦合理论,对将在试验段实施的两侧双排普通热棒路基... 详细信息

为揭示岛状多年冻土区高速铁路路基热状态,提出合理有效的制冷结构,在新建哈尔滨至伊春高速铁路某车站试验段开展现场监测,获得岛状多年冻土的地温数据;基于实测地温数据,采用冻土水热耦合理论,对将在试验段实施的两侧双排普通热棒路基、两侧双排+中心单排全季热棒路基、两侧单排+基底横向通铺全季热棒路基3种制冷路基结构进行数值模拟,对比了3种制冷路基结构的地温分布特征及对下伏岛状多年冻土的降温效果。研究结果表明:铁力地区年均气温和降水呈增大趋势,天然场地岛状多年冻土地温在-0.3℃左右,属于高温极不稳定多年冻土。3种制冷路基结构中,两侧单排+基底横向通铺全季热棒对岛状多年冻土保护及降温效果最优,两侧双排普通热棒最差。普通热棒路基的多年冻土上限呈“两侧凸,中间凹”形态,抬升不明显;全季热棒路基的多年冻土上限呈“上凸缓斜平顶”形态,抬升显著。研究成果可对多年冻土区高速铁路路基建设和结构优化提供技术支撑。

关键词：寒区铁路路基岛状多年冻土普通热棒全季热棒冻土上限

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

胺液净化中离子交换树脂的失效与再生研究

引用

现代化工 2024年第10期44卷 99-103页

作者：刘艳艳王立达刘贵昌李河金郝安峰王华大连理工大学化工学院辽宁大连116024 山东京博控股集团有限公司山东滨州256500

离子交换法常被应用于胺液净化领域,但是在低碱液浓度下部分离子交换树脂难以再生,存在失效的问题。利用SEM、EDS、FT-IR和XPS等手段对树脂的失效原因进行分析,并利用电再生的方法对失效树脂的再生进行了探究。实验结果显示,树脂净化胺... 详细信息

离子交换法常被应用于胺液净化领域,但是在低碱液浓度下部分离子交换树脂难以再生,存在失效的问题。利用SEM、EDS、FT-IR和XPS等手段对树脂的失效原因进行分析,并利用电再生的方法对失效树脂的再生进行了探究。实验结果显示,树脂净化胺液前后的骨架和功能基团并未改变,但是硫元素的质量分数显著提升,结合S 2p光谱存在162.2 eV和163.4 eV 2个分裂峰,说明树脂失效的主要原因是吸附的硫离子难以解吸;对失效树脂施加电再生时树脂的交换容量提升了3.6倍,吸附的硫元素质量分数下降了57.5%,表明电再生的方式可以提高树脂的交换容量和树脂内硫离子的解吸程度。

关键词：离子交换树脂胺液净化树脂失效失效树脂再生

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

Lymphovenous anastomosis and complex decongestive therapy for severe deformed lymphedema with recurrent infection:A case report

引用

World Journal of Clinical Cases 2024年第22期12卷 5159-5167页

作者： He-Jun wang Qing-Qing He Chang-rui liu Ying-Ying wang Xun-Wei liu Department of Thyroid and Breast Surgery The 960th Hospital of People’s Liberation ArmyJinan 250000Shandong ProvinceChina Department of Oncology The 960th Hospital of People’s Liberation ArmyJinan 250000Shandong ProvinceChina

BACKGROUND Lower extremity lymphedema is a common complication following treatment for gynecological *** incidence rate can reach up to 70%,affecting~20 million people ***,specialized treatment centers are scarce,and there is a lack of consensus on treatment ***,there are even fewer reports on the systematic and effective treatment of severe lymphedema with *** management of this condition remains a significant challenge for *** SUMMARY A 40-year-old woman developed bilateral leg swelling 6 years after receiving treatment for endometrial *** August 2018,she experienced>30 episodes of *** presentation,she exhibited bilateral leg swelling and deformation,with four large swellings in the posterior thigh that impeded movement,and pain in the *** manifestations included lichenoid lesions and features of deep *** lymphoscintigraphy confirmed the diagnosis of lower limb *** 6 mo of complex decongestive therapy(CDT)and three lymphaticovenous anastomosis(LVA)treatments,the patient lost 49 kg in *** also experienced a maximum circumference reduction of 35.2 cm in the left lower limb and 37.5 cm in the right lower *** leg pain disappeared,her swelling significantly decreased,and she regained the ability to walk,cycle,and run *** The combined application of CDT and LVA therapy demonstrates significant positive effects in the treatment of severe,deformed stage III lymphedema.

关键词： Lower extremity lymphedema Endometrial cancer Lymphaticovenous anastomosis Complex decongestive therapy Gynecological malignancies Recurrent infection Case report

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

高熵陶瓷材料研究进展及挑战

引用

材料工程 2024年第1期52卷 83-100页

作者：王云平刘世民董闯大连交通大学材料科学与工程学院辽宁大连116028 大连大学辽宁大连116622 大连理工大学三束材料改性教育部重点实验室辽宁大连116024

高熵作为全新的材料体系,得益于巨大的组分空间、独特的微观结构以及较大的构型熵所赋予其独特且可调的优异性能,已成为材料领域的研究热点。高熵陶瓷的研究目前还处于探索阶段,尤其在精准的成分设计理论、高纯高产率粉体制备、新型烧... 详细信息

高熵作为全新的材料体系,得益于巨大的组分空间、独特的微观结构以及较大的构型熵所赋予其独特且可调的优异性能,已成为材料领域的研究热点。高熵陶瓷的研究目前还处于探索阶段,尤其在精准的成分设计理论、高纯高产率粉体制备、新型烧结工艺等方面,亟待深入研究。因此,本文针对高熵陶瓷的五大高熵效应、新的设计理论、粉体制备方法、新型烧结工艺以及综合性能与实际应用进行了梳理归纳,并通过团簇加连接原子模型(CPGA)对高熵陶瓷(HEC)成分设计进行解析,深入挖掘了HEC的组元和微结构以及性能之间的关系。未来HEC的重点发展方向仍然为基础理论设计,尤其是针对非氧化物HEC成分结构。同时,在样品制备上要在学科交叉领域寻找突破,如采用人工智能机器学习与3D打印进行制备。最后,要寻找结构、热障耐腐涂层、机械、工程光学和磁性等方面实际应用并对探究工况环境下的强化、失效机制深入探究分析。

关键词：高熵陶瓷成分设计团簇加连接原子模型(CPGA) 制备工艺性能应用

来源：

维普期刊数据库博看期刊

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

On-Surface Synthesis of Electron-Deficient Bisanthene Tetraimide

引用

CCS Chemistry 2024年第3期6卷 672-681页

作者： Ye liu Liangliang Chen hailong Li Xi-Sha Zhang Qigang Zhong Zhengming Hao Minghui Wu yan-Ying Huang Lina wang Minchong Sheng Miao Xie haiming Zhang Deqing Zhang Lifeng Chi Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano&Soft Materials(FUNSOM)Soochow UniversitySuzhouJiangsu 215123 CAS Key Laboratory for Organic Solids Institute of ChemistryChinese Academy of SciencesBeijing 100190 Institute of Applied Physics Justus Liebig University GiessenGiessen 35392

Imide-based conjugated molecules have emerged as a highly promising class of building blocks for constructing n-type semiconducting materials with lowlying lowest unoccupied molecular orbitals and exceptional *** imides,such as naphthalene diimides,perylene diimides and their lateral fused analogs,have been synthesized extensively,the design and synthesis of largerπ-extended molecules incorporating more than two imide groups are desirable but still very ***,we report the synthesis of an unprecedented electron-deficient bisanthene tetraimide(ATI)containing a bisantheneconjugated core and four five-membered imide groups,which was successfully achieved via a combined approach of solution and on-surface *** chemical structures,electronic states,formation mechanism and aromaticity of ATI were systematically investigated by scanning tunneling microscopy,noncontact atomic force microscopy,scanning tunneling spectroscopy,and density functional theory calculations.

关键词： on-surface synthesis electron-deficient bisanthene tetraimide dehydrocyclization low lowest unoccupied molecular orbital level

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

基于STM32的牡蛎重量分级机控制系统设计

引用

中国农机化学报 2024年第5期45卷 111-115页

作者：杨进王萌孙成波王昊冯博刘长卿江苏海洋大学机械工程学院江苏连云港222005 广东海洋大学水产学院广东湛江524000 江苏科技大学船舶与海洋学院江苏镇江212000 江苏海洋大学海洋工程学院江苏连云港222005

为提高牡蛎自动化加工水平,基于STM32单片机设计牡蛎重量分级控制系统。该控制系统由数据采集模块、分级控制模块、驱动模块和人机交互模块组成,以牡蛎重量为分级标准,称重托盘重量和位置信息为主要控制条件,采用遗传算法优化神经网络(G... 详细信息

为提高牡蛎自动化加工水平,基于STM32单片机设计牡蛎重量分级控制系统。该控制系统由数据采集模块、分级控制模块、驱动模块和人机交互模块组成,以牡蛎重量为分级标准,称重托盘重量和位置信息为主要控制条件,采用遗传算法优化神经网络(GA-BP)动态称重模型和动态追踪定位方式,准确获得牡蛎重量和称重托盘位置,使用触摸屏进行人机交互,可实现称重分级一体化。试验结果表明,该控制系统的称重误差最大为0.8 g,在最大运行速度下,分级准确率达到95%,较好地实现牡蛎快速称重分级。

关键词：牡蛎重量分级 GA-BP算法动态称重控制系统

来源：

维普期刊数据库博看期刊

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

Exploring hidden-charm and hidden-strange hexaquark states from lattice QCD

引用

Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 30-37页

作者： Hang liu jinchen He liuming liu Peng Sun Wei wang Yi-Bo yang Qi-An Zhang INPAC Key Laboratory for Particle Astrophysics and Cosmology(MOE)Shanghai Key Laboratory for Particle Physics and CosmologySchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Maryland Center for Fundamental Physics Department of PhysicsUniversity of MarylandCollege ParkMaryland 20742USA Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Department of Physics and Institute of Theoretical Physics Nanjing Normal UniversityNanjing 210023China Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou 310024China International Centre for Theoretical Physics Asia-Pacific Beijing 100049/Hangzhou 310024China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Physics Beihang UniversityBeijing 102206China

Based on five different ensembles of newly generated(2+1)-flavor configurations with pion mass of approximately mπ■(140-310)MeV,we present a lattice analysis of hidden-charm and hidden-strange hexaquarks with the quark content■.The correlation matrices of two types of operators with JPC=0++,0-+,1++and 1--are simulated to extract the masses of the hexaquark candidates,which are subsequently extrapolated to the physical pion mass and continuum *** results indicate that ground state masses are below the■threshold and provide a characteristic signal for the experimental discovery of hexaquark candidates,which may enrich the versatile structure of multiquarks;moreover,it is an indispensable step to decipher the nonperturbative nature of the fundamental interactions of quarks and gluons.

关键词： quantum chromodynamics lattice QCD multiquark states

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：