检索结果-南通市图书馆

论农村孤儿抚育的变迁——从宏观社会结构与农村社会微观变动视角考察

在线全文

学校读者我要写书评

暂无评论

中南民族大学学报（人文社会科学版） 2010年第3期30卷 104-108页

作者：杨生勇华中师范大学社会学学院湖北武汉430079

农村孤儿抚育是农村孤儿福利甚或农村社会福利的一个重要缩影。农村孤儿抚育问题探讨的不仅是某一特殊群体和某一类特殊性论题,作为一项社会事实更牵涉到社会结构的多个层面和领域,故需要探讨国家宏观层面整体性的社会政治变迁和微观层... 详细信息

农村孤儿抚育是农村孤儿福利甚或农村社会福利的一个重要缩影。农村孤儿抚育问题探讨的不仅是某一特殊群体和某一类特殊性论题,作为一项社会事实更牵涉到社会结构的多个层面和领域,故需要探讨国家宏观层面整体性的社会政治变迁和微观层面农村社会自身的社会政治变迁对农村孤儿抚育问题的总体性影响,并将之置于现代化、市场化和城市化大背景下,关注农村政策变动下孤儿抚育所体现的国家与社会之间的关系形态与互动过程。

关键词：农村孤儿抚育社会变迁社会福利

在线全文

学校读者我要写书评

暂无评论

施工企业周转材料及小型机具管理探讨

筑路机械与施工机械化 2016年第7期33卷 109-111页

作者：阳永升中铁三局集团有限公司山西太原030001

针对道路工程中周转材料及小型机具重复使用的特点,概述了施工企业对周转材料及小型机具的管理现状及普遍存在的问题,并在此基础上探讨了周转材料和小型机具的管理模式和周转效率,最后提出严格管理合同、认真梳理资产、有效盘活资产、... 详细信息

针对道路工程中周转材料及小型机具重复使用的特点,概述了施工企业对周转材料及小型机具的管理现状及普遍存在的问题,并在此基础上探讨了周转材料和小型机具的管理模式和周转效率,最后提出严格管理合同、认真梳理资产、有效盘活资产、加强索赔管理等切实可行的强化管理对策和对相关问题的解决办法,可为施工企业的资产管理提供有益的参考。

关键词：施工企业周转材料机具管理

One-step calcination synthesis of interface-coherent crystallized and surface-passivated LiNi_(0.5)Mn_(1.5)O_(4) for high-voltage lithium-ion battery

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第5期17卷 4192-4202页

作者： Min Xu Bifu sheng yong Cheng Junjie Lu Minfeng Chen Peng Wang Bo Liu Jizhang Chen Xiang Han Ming-sheng Wang Siqi Shi College of Materials Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjing 210037China State Key Laboratory of Physical Chemistry of Solid Surfaces College of MaterialsXiamen UniversityXiamen 361005China College of Mathematics and Physics Jinggangshan UniversityJi’an 343009China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Western Digital Corporation 951 Sandisk DrMilpitasCA 95035USA

LiNi_(0.5)Mn_(1.5)O_(4)(LNMO)with a spinel crystal structure presents a compelling avenue towards the development of economic cobalt-free and high voltage(~5 V)lithium-ion ***,the elevated operational voltage of LNMO gives rise to pronounced interfacial interactions between the distorted surface lattices characterized by Jahn-Teller(J-T)distortions and the electrolyte ***,a localized crystallized coherent LaNiO_(3) and surface passivated Li_(3)PO_(4) layer is deposited on LNMO via a one-step calcination *** evidenced by transmission electron microscopy(TEM),time-of-flight secondary ion mass spectrometry(ToF-SIMS)and density functional theory(DFT)calculation,the epitaxial growth of LaNiO_(3) along the LNMO lattice can effectively stabilize the structure and inhibit irreversible phase transitions,and the Li_(3)PO_(4) surface coating can prevent the chemical reaction between HF and transition metals without sacrificing the electrochemical *** addition,the ionic conductive Li_(3)PO_(4) and atomic wetting inter-layer enables fast charge transfer transport ***,the LNMO material enabled by the lattice bonding and surface passivating features,demonstrates high performance at high current densities and good capacity retention during long-term *** rational design of interface coherent engineering and surface coating layers of the LNMO cathode material offers a new perspective for the practical application of high-voltage lithium-ion batteries.

关键词： high-voltage cathode interface-coherent surface passivating electrochemical performance

Investigating the Mechanism of Qu Du Qiang Fei 1 Hao Fang Formula against Coronavirus Disease 2019 Based on Network Pharmacology Method

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

World Journal of Traditional Chinese Medicine 2024年第1期10卷 93-103页

作者： Yuan-Hua Wang He-yang Zhou Jin-Yun Ma Gui-Qing Ding Hua Yu yong-sheng Jin Xiao-Dong Cheng Institute of Clinical Immunology Yue-Yang Hospital of Integrative MedicineShanghai University of Traditional Chinese MedicineShanghaiChina School of Pharmacy Naval Medical UniversityShanghaiChina

Objective:Qu Du Qiang Fei 1 Hao Fang(QDQF1)is a novel Chinese herbal medicine formula used to treat coronavirus disease 2019(COVID-19).However,the pharmacological mechanisms of action of QDQF1 remain *** objective of this study was to identify the effective ingredients and biological targets of QDQF1 for COVID-19 *** and Methods:The effective ingredients and mechanisms of action of QDQF1 were analyzed by using network pharmacology methods,which included an analysis of the effective ingredients and corresponding targets,COVID-19-related target acquisition,compound-target network analyses,protein-protein interaction network analysis,Kyoto Encyclopedia of Genes and Genomes(KEGG)and Gene Ontology(GO)enrichment analyses,and molecular docking ***:In total,288 effective QDQF1 ingredients were *** identified 51 core targets from the 148 targets through an overlap between putative QDQF1 targets and COVID-19-related *** key components,including formononetin,kaempferol,luteolin,naringenin,quercetin,and wogonin were identified through component-target network *** functional enrichment analysis of the core targets revealed 1296 items,while KEGG pathway enrichment analysis identified 148 signaling *** central targets(CCL2,CXCL8,IL1B,IL6,MAPK1,MAPK3,MAPK8,STAT3,and TNF)related to the COVID-19 pathway were identified in the KEGG pathway enrichment ***,molecular docking analysis suggested that the docking scores of the six key components to the nine central targets were better than those to ***:QDQF1 may regulate multiple immune-and inflammation-related targets to inhibit the progression of severe acute respiratory syndrome coronavirus 2,and thus,may be suitable for the treatment of COVID-19.

关键词： Coronavirus disease 2019 molecular docking molecular mechanism network pharmacology Qu Du Qiang Fei 1 Hao Fang formula

在线全文

学校读者我要写书评

暂无评论

喷水推进泵空化特征联合分类识别

上海交通大学学报 2011年第9期45卷 1322-1326,1331页

作者：段向阳王永生苏永生海军工程大学船舶与动力学院武汉430033

在无空化区、空化Ⅰ区和空化Ⅱ区3种工况条件下,利用安装在实船喷水推进泵检查孔内的水听器和布置在泵壳上的加速度传感器获取喷水推进泵的声压和振动信号.通过二阶导数分析发现,空化前后声压和振动信号的二阶导数均具有显著的差别,空... 详细信息

在无空化区、空化Ⅰ区和空化Ⅱ区3种工况条件下,利用安装在实船喷水推进泵检查孔内的水听器和布置在泵壳上的加速度传感器获取喷水推进泵的声压和振动信号.通过二阶导数分析发现,空化前后声压和振动信号的二阶导数均具有显著的差别,空化后声压信号在8~25 kHz、振动信号在3~12 kHz频段上出现了明显的峰值.以该特征频段上二阶导数的峰值序列为基础,构造特征集并进行特征联合分类识别.结果表明：利用特征联合分类识别可以区分无空化区、空化Ⅰ区和空化Ⅱ区的信号,多传感器特征联合分类识别的效果优于单传感器特征联合分类,尤其是基于二阶导数的多传感器特征联合分类识别的效果较为理想.

关键词：喷水推进泵空化特征集联合分类识别

在线全文

学校读者我要写书评

暂无评论

供应商管理库存的分销系统利润模型及其算法

交通运输工程学报 2008年第3期8卷 122-126页

作者：刘诚阳永生中南大学数学科学与计算技术学院湖南长沙410075 长沙民政职业技术学院文法系湖南长沙410004

为了进一步提高分销系统的利润,针对拓扑结构为一个分销商或供应商与若干个零售商的分销网络,研究了在产品具有随机价格弹性需求时的系统优化问题,采用各零售商处采用周期盘点的库存控制策略与供应商管理库存模式,建立了分销系统利润优... 详细信息

为了进一步提高分销系统的利润,针对拓扑结构为一个分销商或供应商与若干个零售商的分销网络,研究了在产品具有随机价格弹性需求时的系统优化问题,采用各零售商处采用周期盘点的库存控制策略与供应商管理库存模式,建立了分销系统利润优化模型,设计了相应的求解算法。计算结果表明:供货价格与正常批发价格的比值对模型最优解不产生影响,随着商品零售价格的增加,销售总量下降,供应商的利润下降,但是零售商的利润却上升了,因此,在确保系统总利润最大的前提下,可通过合约的形式确定供货价格与正常批发价格的比值,将零售商一定比例的利润转让给供应商,从而激发供应商的积极性。

关键词：供应链管理供应商管理库存利润优化模型分销系统库存控制策略

Fracture geometry and breakdown pressure of radial borehole fracturing in multiple layers

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第1期21卷 430-444页

作者： Yu-Ning yong Zhao-Quan Guo Shou-Ceng Tian Lu-Yao Ma Tian-Yu Wang Mao sheng National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China Beijing Petroleum Machinery Company Limited CNPC Engineering Technology R&D Company LimitedBeijing102206China Smart Energy Co. LtdChina Xiongan GroupXiong’an New Area071000HebeiChina

Radial borehole fracturing that combines radial boreholes with hydraulic fracturing is anticipated to improve the output of tight oil and gas *** paper aims to investigate fracture propagation and pressure characteristics of radial borehole fracturing in multiple layers.A series of laboratory experiments with artificial rock samples(395 mm×395 mm×395 mm)was conducted using a true triaxial fracturing *** crucial factors corresponding to the vertical distance of adjacent radial borehole layers(vertical distance),the azimuth and diameter of the radial borehole are *** results show that radial borehole fracturing in multiple layers generates diverse fracture *** types of fractures are identified based on the connectivity between hydraulic fractures and radial *** vertical distance significantly influences fracture propagation perpendicular to the radial borehole *** increase in the vertical distance impedes fracture connection across multiple radial borehole layers and reduces the fracture propagation distance along the radial borehole *** azimuth also influences fracture propagation along the radial borehole *** the azimuth reduces the guiding ability of radial boreholes,which makes the fracture quickly curve to the maximum horizontal stress *** breakdown pressure correlates with diverse fracture geometries *** the fractures connect multi-layer radial boreholes,increasing the vertical distance decreases the breakdown *** the azimuth and increasing the diameter also decrease the breakdown *** extrusion force exists between the adjacent fractures generated in radial boreholes in multiple rows,which plays a crucial role in enhancing the guiding ability of radial boreholes and results in higher breakdown *** research provides valuable theoretical insights for the field application of radial borehole fracturing technology in tight oil and g

关键词： Multi-layer radial boreholes Hydraulic fracturing Fracture propagation Pressure characteristic

在线全文

学校读者我要写书评

暂无评论

一种自适应调节粒子群优化算法的研究

西安科技大学学报 2011年第3期31卷 356-362页

作者：杨永生西安交通大学轴承所陕西西安710049 陕西省行政学院计算机系陕西西安710068

针对粒子群优化算法容易出现早熟收敛和稳定性低的现象,提出一种自适应调节的粒子群算法。算法中通过自适应调节适应度值的均匀分布保持种群的多样性,该策略能够提高算法的全局搜索能力,同时可避免阈值对算法稳定性的影响。另外采用自... 详细信息

针对粒子群优化算法容易出现早熟收敛和稳定性低的现象,提出一种自适应调节的粒子群算法。算法中通过自适应调节适应度值的均匀分布保持种群的多样性,该策略能够提高算法的全局搜索能力,同时可避免阈值对算法稳定性的影响。另外采用自适应周期性变异的惯性权重对粒子的速度进行更新,可改善算法的局部搜索能力和稳定性。使用多维标准函数对改进的算法进行仿真试验,结果表明,算法具有较好的全局搜索精度和稳定性,避免了早熟收敛。

关键词：粒子群优化多样性均匀分布周期性变异

Transient diabetes mellitus with ABCC8 variant successfully treated with sulfonylurea:Two case reports and review of literature

在线全文

学校读者我要写书评

暂无评论

World Journal of Diabetes 2024年第8期15卷 1811-1819页

作者： Ling-Hua Shen Yan Cui Dong-Xia Fu Wei yang sheng-Nan Wu Hui-Zhen Wang Hai-Hua yang yong-Xing Chen Hai-Yan Wei Department of Endocrinology and Metabolism Henan Key Laboratory of Children's Genetics and Metabolic DiseasesChildren's Hospital Affiliated to Zhengzhou UniversityHenan Children's Hospital Zhengzhou Children's HospitalZhengzhou 450018Henan ProvinceChina

BACKGROUND Transient neonatal diabetes mellitus(TNDM)is a rare form of diabetes mellitus that usually presents within the first 6 mo of *** often enter remission within several months,although relapse can occur later in *** in the ABCC8 gene,which encodes the sulfonylurea receptor 1 of the ATP-sensitive potassium channel in pancreatic beta cells,are associated with TNDM and permanent neonatal *** study describes a novel de novo c.3880C>T heterozygous ABCC8 variant that causes TNDM and can be treated with sulfonylurea *** SUMMARY We retrospectively analyzed 2 Chinese patients with TNDM who were diagnosed,treated,or referred for follow-up between September 2017 and September *** patients were tested for mutations using targeted next-generation *** with neonatal diabetes mellitus caused by a c.3880C>T heterozygous missense variant in the ABCC8 gene have not been reported *** children had an onset of post-infectious diabetic ketoacidosis,which is worth *** a follow-up visit after discontinuing insulin injection,oral glyburide was found to be effective with no adverse *** Early genetic testing of neonatal diabetes mellitus aids in accurate diagnosis and treatment and helps avoid daily insulin injections that may cause pain.

关键词： Neonatal diabetes mellitus ABCC8 Sulfonylurea receptors 1 KATP channels Sulfonylurea Glyburide Insulinulin Case report