检索结果-南通市图书馆

依势而为:政治势能何以转化为乡村治理效能?——以R村由“后进村”向“示范村”蝶变为例

在线全文

学校读者我要写书评

暂无评论

岭南学刊 2024年第4期 41-57页

作者：陈晓运刘循跃中共广东省委党校(广东行政学院)科研处广东广州510053 中共广东省委党校(广东行政学院) 广东广州510053

乡村治理是国家治理的重要方面,也是推进乡村振兴的基本保障。将“政治势能”概念引入乡村治理场域进行动态路径剖析发现,R村通过“依势而为”的行动路径推动政治势能经由“酝酿趋势—构建权势—扩大声势—明确定势—实现借势”的演进... 详细信息

乡村治理是国家治理的重要方面,也是推进乡村振兴的基本保障。将“政治势能”概念引入乡村治理场域进行动态路径剖析发现,R村通过“依势而为”的行动路径推动政治势能经由“酝酿趋势—构建权势—扩大声势—明确定势—实现借势”的演进逻辑转化为乡村治理效能,实现了由“后进村”向“示范村”的蝶变,其中的关键是“党的领导在场”,彰显了具有中国特色的“政党统合社会”制度逻辑,在理论上拓宽了“政治势能”的内涵和解释范畴,在实践上为国家治理制度优势转化提供可行进路。

关键词：依势而为政治势能乡村振兴治理效能

基于响应面法的煤体有效抽采半径多因素交互作用

在线全文

学校读者我要写书评

暂无评论

科学技术与工程 2024年第19期24卷 8036-8044页

作者：陈明义刘惠族徐飞田富超陈晓昀石家庄铁道大学安全工程与应急管理学院石家庄050043 中煤科工集团沈阳研究院有限公司煤矿安全技术国家重点实验室抚顺113122 石家庄铁道大学土木工程学院石家庄050043

钻孔有效抽采半径是煤层瓦斯抽采参数设计的重要指标。为探究煤体基础物性因素(含水率、渗透率、瓦斯压力)对钻孔有效抽采半径的影响特性,首先基于煤的基质-裂隙双重孔隙理论,考虑水分对裂隙开度及基质瓦斯吸附性能的弱化影响,构建了考... 详细信息

钻孔有效抽采半径是煤层瓦斯抽采参数设计的重要指标。为探究煤体基础物性因素(含水率、渗透率、瓦斯压力)对钻孔有效抽采半径的影响特性,首先基于煤的基质-裂隙双重孔隙理论,考虑水分对裂隙开度及基质瓦斯吸附性能的弱化影响,构建了考虑水分影响的煤体渗透率模型与固-气多场耦合模型;其次利用多物理场数值模拟方法并结合响应面分析法研究了不同因素对钻孔有效抽采半径的交互作用。研究发现钻孔有效抽采半径与初始渗透率呈正相关,而与初始瓦斯压力、含水率均为负相关;建立了瓦斯抽采半径与三个因素的二次多元响应面模型,并分析发现含水率、初始瓦斯压力、渗透率对钻孔有效抽采半径的影响显著性逐次降低,并且在一定程度上,煤体初始瓦斯压力的增加会弱化煤岩初始渗透率和含水率对钻孔有效抽采半径的影响,煤体初始渗透率和含水率也会显著改变初始瓦斯压力对钻孔有效抽采半径的影响,然而煤体初始渗透率几乎未改变含水率对钻孔有效抽采半径的影响。

关键词：有效抽采半径含水率渗透率瓦斯压力响应面法

三种粘接材料对氧化锆与牙本质粘接强度的研究

在线全文

学校读者我要写书评

暂无评论

临床口腔医学杂志 2024年第6期40卷 328-331页

作者：林艺娜陈爱国陈晓芸厦门市中医院口腔科福建厦门361009 厦门大学附属第一医院口腔科福建厦门361003

目的:研究3种不同粘接材料对氧化锆与牙本质粘接强度的影响。方法:制作60件氧化锆试件,随机分成3组(n=20),分别用树脂加强型玻璃离子水门汀、AZ-Prime联合Duo-Link树脂水门汀、BeautiCem SA树脂水门汀将氧化锆与牙本质进行粘接,依次记为... 详细信息

目的:研究3种不同粘接材料对氧化锆与牙本质粘接强度的影响。方法:制作60件氧化锆试件,随机分成3组(n=20),分别用树脂加强型玻璃离子水门汀、AZ-Prime联合Duo-Link树脂水门汀、BeautiCem SA树脂水门汀将氧化锆与牙本质进行粘接,依次记为A组、B组、C组,各组随机选取10件置于37℃恒温水浴箱24 h,记为老化前;10件置于37℃恒温水浴箱6个月用来检测粘接耐久性,记为老化后,测试粘接剪切强度,分析粘接界面断裂模式。结果:老化前,A组剪切强度小于B组、C组(P0.05)。老化后,3组间剪切强度差异具有统计学意义,A组剪切强度最低,B组次之,C组最高(P<0.05)。老化前后相比,各组的粘接剪切强度均明显降低(P<0.05)。结论:BeautiCem SA树脂水门汀能获得较高的粘接剪切强度和粘接耐久性,满足临床需要。

关键词：粘接剪切强度粘接剂氧化锆耐久性

Influence of Regular Wave and Ship Characteristics on Mooring Force Prediction by Data-Driven Model

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2020年第4期34卷 589-596页

作者： LIU Bi-jin chen xiao-yun ZHANG You-quan XIE Jing CHANG Jiang School of Civil Engineering and Architecture Xiamen University of TechnologyXiamen 361024China Fujian Marine Forecasts Fuzhou 350003China Tianjin Research Institute for Water Transport Engineering Tianjin 300456China Tianjin Survey and Design Institute for Water Transport Engineering Tianjin Key Laboratory of Surveying and Mapping for Waterway Transport EngineeringTianjin 300456China

The study of mooring forces is an important issue in marine engineering and offshore *** being widely applied in mooring system,numerical simulations suffer from difficulties in their multivariate and nonlinear ***-driven model is employed in this paper to predict the mooring forces in different lines,which is a new attempt to study the mooring *** height and period of regular wave,length of berth,ship load,draft and rolling period are considered as potential influencing *** variables are determined using mutual information(MI)and principal component analysis(PCA),and imported to an artificial neural network(NN)model for *** study case of 200 and 300 thousand tons ships experimental data obtained in Dalian University of Technology,MI is found to be more appropriate to provide effective input variables than *** the three factors regarding ship characteristics are highly correlated,it is recommended to input all of them to the NN *** accuracy of predicting aft spring line force attains as high as 91.2%.The present paper demonstrates the feasibility of MI-NN model in mapping the mooring forces and their influencing factors.

关键词： mooring force characteristics of ship neural network mutual information principal component analysis

Identification of novel nuclear localization signal within the ErbB-2 protein

在线全文

学校读者我要写书评

暂无评论

Cell Research 2005年第7期15卷 504-510页

作者： Qiao Qiao chen, xiao Ying chen, yun yun JIANG, Jing LIU*School of Life Science, University of Science and Technology of China, Hefei 230027, China School of Life Science University of Science and Technology of China Hefei China

ErbB2, a member of the receptor tyrosine kinase family, is frequently over-expressed in breast cancer. Proteolysis ofthe extracellular domain of ErbB2 results in constitutive activation of ErbB2 kinase. Recent study reported that ErbB2is found in the nucleus. Here, we showed that ErbB2 is imported into the nucleus through a nuclear localization signal(NLS)-mediated mechanism. The NLS sequence KRRQQKIRKYTMRR (aa655-668) contains three clusters of basicamino acids and it is sufficient to target GFP into the nucleus. However, mutation in any basic amino acid cluster of thisNLS sequence significantly affects its nuclear localization. Furthermore, it was found that this NLS is essential for thenuclear localization of ErbB2 since the intracellular domain of Erb2 lacking NLS completely abrogates its nucleartranslocation. Taken together, our study identified a novel nuclear localization signal and reveals a novel mechanismunderlying ErbB2 nuclear trafficking and localization.

关键词： ErbB2 NLS intracellular domain.

Waste Water Disinfection During SARS Epidemic for Microbiological and Toxicological Control

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2006年第3期19卷 173-178页

作者： CHAO chen xiao-JIAN ZHANG yun WANG LING-XIA ZHU JING LIU Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China

Objective To evaluate the disinfection of wastewater in China. Methods During the SARS epidemic occurred in Beijing, a study of different disinfection methods used in the main local wastewater plants including means of chlorine, chlorine dioxide, ozone, and ultraviolet was carried out in our laboratory. The residual coliform, bacteria and trihalomethanes, haloacetic acids were determined after disinfection. Results Chlorine had fairly better efficiency on microorganism inactivation than chlorine dioxide with the same dosage. Formation of THMs and HAAs does not exceed the drinking water standard. UV irradiation had good efficiency on microorganism inactivation and good future of application in China. Organic material and ammonia nitrogen was found to be significant on inactivation and DBPs formation. Conclusion Chlorine disinfection seems to be the best available technology for coliform and bacteria inactivation. And it is of fairly low toxicological hazard due to the transformation of monochloramine.

关键词： Wastewater disinfection Chlorine Chlorine dioxide Ozone Ultraviolet Disinfection by-products

Precision Plate Plan View Pattern Predictive Model

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2011年第11期18卷 26-30页

作者： ZHAO Yang YANG Quan HE An-rui WANG xiao-chen ZHANG yun Engineering Research Institute University of Science and Technology Beijing Beijing 100083 China

According to the rolling features of plate mill, a 3D elastic-plastic FEM （finite element model） based on full restart method of ANSYS/LS-DYNA was established to study the inhomogeneous plastic deformation of multipass plate rolling. By analyzing the simulation results, the difference of head and tail ends predictive models was found and modified. According to the numerical simulation results of 120 different kinds of conditions, precision plate plan view pattern predictive model was established. Based on these models, the sizing MAS （mizushima automatic plan view pattern control system） method was designed and used on a 2 800 mm plate mill. Comparing the rolled plates with and without PVPP （plan view pattern predictive） model, the reduced width deviation indicates that the olate !olan view Dattern predictive model is preeise.

关键词： plate plan view pattern FEM LS-DYNA full restart

脑梗死后癫痫发作诊断中视频脑电图检查的作用

在线全文

学校读者我要写书评

暂无评论

中国医疗器械信息 2024年第13期30卷 110-112页

作者：周旺侨陈晓云王美慧厦门市第三医院福建厦门361000

目的:分析脑梗死后癫痫发作诊断中视频脑电图检查的作用。方法:将2020年7月~2023年5月本院收治的80例患者作为研究对象,依据抽签法将其分为对照组与观察组,各40例,对照组实施常规脑电图检查,观察组实施视频脑电图检查,对比两组检测结果... 详细信息

目的:分析脑梗死后癫痫发作诊断中视频脑电图检查的作用。方法:将2020年7月~2023年5月本院收治的80例患者作为研究对象,依据抽签法将其分为对照组与观察组,各40例,对照组实施常规脑电图检查,观察组实施视频脑电图检查,对比两组检测结果。结果:两组暴发性癫痫样放电、局限性癫痫样放电、周期性一侧癫痫样放电、局限性慢波活动、脑电波左右不对称等指标对比,差异有统计学意义(P<0.05);观察组同步发作、深部白质区癫痫样波检出、脑叶皮质区癫痫样波检出率高于对照组,差异有统计学意义(P<0.05)。结论:视频脑电图对患者的应用可以提升暴发性癫痫样放电、局限性癫痫样放电、周期性一侧癫痫样放电、局限性慢波活动、脑电波左右不对称、背景节律慢、背景无节律的检出率,也可以促进同步发作、深部白质区有癫痫样波、脑叶皮质区癫痫样波的检出,为之后获得有效治疗提供必要支持。

关键词：脑梗死后癫痫发作视频脑电图检查诊断价值

稻纵卷叶螟对氯虫苯甲酰胺的抗性监测及其抗氯虫苯甲酰胺种群对其他双酰胺类杀虫剂的交互抗性

在线全文

学校读者我要写书评

暂无评论

昆虫学报 2024年第4期67卷 498-506页

作者：王立董蓓蓓刘思彤陈韵箫杨凤霞张帅高聪芬南京农业大学植物保护学院绿色农药创制与应用技术国家地方联合工程研究中心南京210095 云南农垦产业研究院有限公司昆明650106 全国农业技术推广服务中心北京100026

【目的】本研究旨在明确稻纵卷叶螟Cnaphalocrocis medinalis对氯虫苯甲酰胺的抗性水平、抗性稳定性及其抗氯虫苯甲酰胺种群对其他双酰胺类杀虫剂是否存在交互抗性。【方法】采用稻苗浸渍法测定我国9省(自治区)稻纵卷叶螟32个田间种群... 详细信息

【目的】本研究旨在明确稻纵卷叶螟Cnaphalocrocis medinalis对氯虫苯甲酰胺的抗性水平、抗性稳定性及其抗氯虫苯甲酰胺种群对其他双酰胺类杀虫剂是否存在交互抗性。【方法】采用稻苗浸渍法测定我国9省(自治区)稻纵卷叶螟32个田间种群对氯虫苯甲酰胺和四唑虫酰胺的抗性,并测定了两个氯虫苯甲酰胺抗性种群对其他双酰胺类杀虫剂的交互抗性,以及湖南攸县、安徽潜山、安徽庐江和广西兴安田间种群在室内不接触药剂饲养后对氯虫苯甲酰胺的抗性稳定性。【结果】2019-2022年间,稻纵卷叶螟田间种群对氯虫苯甲酰胺的抗性逐年上升,2022年首次监测到庐江、兴安、武穴、丹阳和潜山种群对氯虫苯甲酰胺达到高水平抗性(102.3~135.1倍),其他种群亦达到中等水平抗性(10.3~97.1倍);2019-2021年监测的所有田间种群对四唑虫酰胺均表现为敏感,2022年所监测种群对四唑虫酰胺达到中等水平抗性(41.9~98.0倍)。交互抗性试验结果表明,对氯虫苯甲酰胺抗性约100倍的浙江嘉兴和安徽潜山种群对氟氯虫双酰胺、四唑虫酰胺、溴氰虫酰胺、环丙虫酰胺和四氯虫酰胺也表现出31.6~100.5倍中等至高水平抗性。稻纵卷叶螟田间种群在室内不接触药剂连续饲养2~4代后,对氯虫苯甲酰胺的抗性表现出快速下降的现象。【结论】稻纵卷叶螟田间种群对氯虫苯甲酰胺和四唑虫酰胺已产生中等至高水平抗性,且对氯虫苯甲酰胺产生抗性的稻纵卷叶螟田间种群对其他5种双酰胺类药剂也存在中等至高水平的交互抗性;鉴于当前稻纵卷叶螟田间种群对氯虫苯甲酰胺的抗性尚不稳定,建议可通过限制或暂停使用该类药剂,以延缓其抗性发展和延长使用寿命。

关键词：稻纵卷叶螟抗药性监测氯虫苯甲酰胺交互抗性抗性稳定性