检索结果-南通市图书馆

山东省城镇劳动者经济地位的获得路径与社会性别分析

在线全文

学校读者我要写书评

暂无评论

中国海洋大学学报（社会科学版） 2013年第6期 71-77页

作者：王忠武葛玉倩山东大学哲学与社会发展学院山东济南250100

社会性别视角下的经济地位研究关注社会资源占有和收益的性别差异,注重分析不同劳动力市场所依赖的不同资源。按照是否拥有高等教育文凭的标准将劳动力市场划分为高教育劳动群体和低教育劳动群体,由分析两类群体人员经济地位获得的不同... 详细信息

社会性别视角下的经济地位研究关注社会资源占有和收益的性别差异,注重分析不同劳动力市场所依赖的不同资源。按照是否拥有高等教育文凭的标准将劳动力市场划分为高教育劳动群体和低教育劳动群体,由分析两类群体人员经济地位获得的不同路径——对高教育群体经济地位提升起关键性作用的是"人力资本",对低教育群体经济地位提升起关键性作用的是其在单位中所处的"结构",进而进一步探究不同劳动力市场所需资源的性别差异更有意义。研究发现,低教育群体显著的性别差异来自于女性群体受到更多的结构性限制——管理职务对女性的排斥以及劳动力市场对大龄女性的歧视;高教育群体趋向于性别平等,原因在于影响该群体经济地位获得的因素——教育、年资和培训经历趋向于收益率的性别平等化。

关键词：经济地位获得路径劳动力市场分割社会性别分析

我国行业协会的发展困境与出路探索——以宁波市为例

在线全文

学校读者我要写书评

暂无评论

宁波职业技术学院学报 2017年第5期21卷 65-68页

作者：葛宇乾宁波市委党校浙江宁波315000

行业协会的改革发展,要着重解决我国行业协会前期快速发展中积累的诸多弊病和深层次矛盾,还要善于借鉴国外优秀经验,增强行业协会自身的造血功能,明确市场主体地位,完善内部法人治理结构。政府应加大扶持力度而不是干预,以政府购买服务... 详细信息

行业协会的改革发展,要着重解决我国行业协会前期快速发展中积累的诸多弊病和深层次矛盾,还要善于借鉴国外优秀经验,增强行业协会自身的造血功能,明确市场主体地位,完善内部法人治理结构。政府应加大扶持力度而不是干预,以政府购买服务为主要手段,构建新型政社关系。要稳步改革二元管理体制,积极推进"一业多会",最大限度激发行业协会活力。

关键词：困境对策行业协会

在线全文

学校读者我要写书评

暂无评论

宁波文化产业的发展问题和对策建议

宁波工程学院学报 2018年第2期30卷 67-71页

作者：葛宇乾中共宁波市委党校浙江宁波315012

文化产业生产的产品及其所提供的服务是直接用于满足人们精神文化层面的消费需求,文化产业已成为促进经济转型升级的新动能。当前宁波文化产业规模持续扩大,产业结构调整出现积极变化,同时,也存在文化产业发展速度滞后于经济发展水平、... 详细信息

文化产业生产的产品及其所提供的服务是直接用于满足人们精神文化层面的消费需求,文化产业已成为促进经济转型升级的新动能。当前宁波文化产业规模持续扩大,产业结构调整出现积极变化,同时,也存在文化产业发展速度滞后于经济发展水平、文化产业规模占GDP的比重较低、发展不平衡等问题。未来宁波文化产业发展要在推进文化管理职能转变、健全体制机制、加大扶持力度和加强引导等方面下功夫。

关键词：文化产业宁波市十三五规划规模化发展

Coupled relationships among anammox,denitrification, and dissimilatory nitrate reduction to ammonium along salinity gradients in a Chinese estuarine wetland

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2021年第8期33卷 39-46页

作者： Zijun Zhou Lei ge Yufang Huang yuqian Liu Siyang Wang Institute of Yellow River Water Resources Protection Zhengzhou 450003China Yellow River Institute of Hydraulic Research Zhengzhou 450003China

Salinization in estuarine wetlands significantly alters the balance between their nitrogen(N)removal and retention abilities but these processes have not yet been characterized *** the present study,the potential rates of sediment denitrification,anaerobic ammonium oxidation(anammox),and dissimilatory nitrate reduction to ammonium(DNRA)were mapped using N isotope tracing methods along salinity gradients across the Yellow River Delta wetland(YRDW)in *** contribution of anammox to total dissimilatory N transformations in YRDW was merely 6.8%,whereas denitrification and DNRA contributed 52.3%and 40.9%,*** potential rate of denitrification(5.82μmol/kg/h)decreased significantly along salinity gradients and markedly exceeded DNRA potential rate(2.7μmol/kg/h)in fresh wetlands,but was lower than that of DNRA in oligohaline wetlands(3.06 and 3.18μmol/kg/h,respectively).Moreover,a significantly positive relationship between salinity and DNRA/denitrification was obeserved,indicating that increased salinity may favor DNRA over ***,total sulfur(TS)content and ratio of total organic carbon to total nitrogen(C/N)increased with the salinity gradient and showed evident positive relationships with the DNRA/denitrification *** this study,we proved that increased salinization resulted in the dominance of DNRA over denitrification,possible through the addition of S and alteration of the C/N in estuarine wetlands,leading to increased N retention in estuarine wetlands during salinization,which would enhance the eutrophication potential within wetlands and in downstream ecosystems.

关键词： Denitrification Anammox DNRA Salinity C/N ratio

Short-term Load Prediction of Integrated Energy System with Wavelet Neural Network Model Based on Improved Particle Swarm Optimization and Chaos Optimization Algorithm

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2021年第6期9卷 1490-1499页

作者： Leijiao ge Yuanliang Li Jun Yan yuqian Wang Na Zhang IEEE School of Electrical and Information Engineering Tianjin University Concordia Institute for Information Systems Engineering Concordia University Sany Heavy Machinery Co. Ltd. Department of Electrical Engineering Inner Mongolia University of Technology

To improve energy efficiency and protect the environment,the integrated energy system(IES)becomes a significant direction of energy structure *** paper innovatively proposes a wavelet neural network(WNN)model optimized by the improved particle swarm optimization(IPSO)and chaos optimization algorithm(COA)for short-term load prediction of *** proposed model overcomes the disadvantages of the slow convergence and the tendency to fall into the local optimum in traditional WNN ***,the Pearson correlation coefficient is employed to select the key influencing factors of load ***,the traditional particle swarm optimization(PSO)is improved by the dynamic particle inertia *** jump out of the local optimum,the COA is employed to search for individual optimal particles in *** the iteration,the parameters of WNN are continually optimized by ***,the feedback link is added to the proposed model,where the output error is adopted to modify the prediction ***,the proposed model is employed for load *** experimental simulation verifies that the proposed model significantly improves the prediction accuracy and operation efficiency compared with the artificial neural network(ANN),WNN,and PSO-WNN.

关键词： Integrated energy system(IES) load prediction chaos optimization algorithm(COA) improved particle swarm optimization(IPSO) Pearson correlation coefficient wavelet neural network(WNN)

Broadband nonlinear optical response of graphdiyne for mid-infrared solid-state lasers

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2021年第9期64卷 67-74页

作者： MengYu Zong yuqian Zu Jia Guo Zhen Zhang JingJing Liu YanQi ge Jie Liu LiangBi Su Shandong Provincial Engineering and Technical Center of Light Manipulations&Shandong Provincial Key Laboratory of Optics and Photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan 250358China Institute of Microscale Optoelectronics Collaborative Innovation Center for Optoelectronic Science&TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro-Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen UniversityShenzhen 518060China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing

Graphdiyne(GDY),a novel all-carbon nanomaterial,is considered the most easily synthesized and stable carbon allotrope,positioning it as a promising photoelectric ***,we successfully fabricated a high-quality GDY saturable absorber and saturable absorber *** broadband nonlinear saturable absorption and ultrafast relaxation dynamic properties in midinfrared region of the GDY were *** solid-state diode-pumped short and ultrashort pulsed lasers were realized using the GDY absorber at wavelengths of 2 and 2.8μm,*** results were then theoretically *** is the first presentation of ultrashort pulsed lasers in the mid-infrared region with GDY *** results resolutely confirm that GDY could be an optional broadband SA for all solid-state mid-infrared pulsed lasers,and they evidence its promising applications in mode-locked ultrafast lasers.

关键词： graphdiyne broadband nonlinear properties all-solid-state laser

同方期刊数据库

引入含氟砌块对天然产物母核5-色酮骨架的构效解析

在线全文

学校读者我要写书评

暂无评论

徐州医科大学学报 2021年第9期41卷 646-650页

作者：徐琳琳宋畅刘景葛宇倩张雅姗路秋丽朱晓彤徐州医科大学公共卫生学院江苏徐州221004 徐州医科大学药学院

目的将极强电负性的氟原子引入2-羟基-2-三氟甲基-3-噻吩-5-色酮C_(23)H_(21)BrF_(3)NO_(3)S的芳香性结构,获得高脂溶性、高稳定的化合物。方法以对溴基苯甲醛、达咪酮、4,4,4-三氟-1-(噻吩-2-基)丁烷-1,3-二酮和醋酸铵为原料,少量的乙... 详细信息

目的将极强电负性的氟原子引入2-羟基-2-三氟甲基-3-噻吩-5-色酮C_(23)H_(21)BrF_(3)NO_(3)S的芳香性结构,获得高脂溶性、高稳定的化合物。方法以对溴基苯甲醛、达咪酮、4,4,4-三氟-1-(噻吩-2-基)丁烷-1,3-二酮和醋酸铵为原料,少量的乙醇作溶剂,多组分一锅法合成目标化合物。核磁共振谱(^(1)H-NMR和^(13)C-NMR)、红外光谱(IR)、高分辨质谱(HRMS)和X射线单晶衍射确证目标化合物的结构,并分析该结构的各平面角度。结果获得目标产物,即2-羟基-7,7-二甲基-3-(噻吩-2-羰基)-4-(对溴苯基)-2-(三氟甲基)-3,4,7,8-四氢-5(6H)-色酮。产物结构经核磁、红外和高分辨质谱确证。单晶X射线衍射分析显示,该产物的晶体结构属正交晶系,空间群Pbca。采用直接法解析该晶体结构,全矩阵最小二乘法修正的原子参数显示,最终的偏离因子为R=0.0464,wR=0.1133。该分子结构中新构筑的吡啶环为半椅式构象。结论本研究通过多组分反应将三氟甲基高效且便捷地引入到色酮骨架。

关键词：含氟砌块 5-色酮多组分一锅法反应晶体结构

微细粒锡石涡流强化浮选及CFD数值模拟研究

在线全文

学校读者我要写书评

暂无评论

矿产保护与利用 2024年第1期44卷 16-23页

作者：葛昱谦李晓恒孙志新韩鑫定张明青闫小康中国矿业大学化工学院江苏徐州221116 中国矿业大学国家煤加工与洁净化工程技术研究中心江苏徐州221116 中国矿业大学环境与测绘学院江苏徐州221116

为提高微细粒锡石矿物的浮选回收效果,采用基于湍流涡调控技术的新型涡流浮选装置对微细粒锡石(d50=16.45μm)进行了浮选实验研究,考察了涡流发生器结构及矿浆循环量对微细粒锡石浮选的影响。通过涡流矿化管内部流场CFD数值模拟,分析了... 详细信息

为提高微细粒锡石矿物的浮选回收效果,采用基于湍流涡调控技术的新型涡流浮选装置对微细粒锡石(d50=16.45μm)进行了浮选实验研究,考察了涡流发生器结构及矿浆循环量对微细粒锡石浮选的影响。通过涡流矿化管内部流场CFD数值模拟,分析了涡流矿化改善微细粒浮选效果的原因。浮选实验表明,使用矩形涡流发生器诱导方式且在循环量0.6 m3/h(Re=21 220)时锡石的回收率为92.96%,精矿锡品位为3.32%。在获得精矿锡品位几乎相同的情况下,回收率相较于光管提高了25.73个百分点;CFD模拟分析结果表明内置矩形涡流发生器的矿化管内平均湍流耗散率和平均湍流动能最高,分别是光管的13.01倍和7.03倍,碰撞概率从1.07%提高到2.32%,矩形涡流发生器能显著改善矿化管的湍流环境,增大了微细颗粒-气泡的碰撞概率,从而起到强化微细粒锡石浮选的作用。

关键词：锡矿微细粒浮选涡流发生器数值模拟

United under stress:High-speed transport network emerging at bacterial living edge

在线全文

学校读者我要写书评

暂无评论

Fundamental Research 2024年第3期4卷 563-569页

作者： Xiaodong Wen Jingjing Feng yuqian Sang Feng ge Hugues Chaté Yan He Department of Chemistry Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical BiologyTshinghua UniversityBeijing 100084China Service de Physique de l'Etat Condensé CEACNRSUniversitéParis-SaclayCEA-SaclayGif-sur-Yvette 91191France Beijing Computational Science Research Center Beijing 100094China

Individuals tend to move freely when there is enough room but would act collectively for their survival under external *** the case of living cells,for instance,when a drop of low-density flagellated bacterial solution is transferred onto the agar surface,the initially disordered movement of individual bacteria would be replaced with coordinated cell swarming after a lag phase of a few ***,we study how such cooperation is established while overcoming the disorder at the onset of the lag phase with single nanoparticle *** the spreading of the droplet,the bacteria in the solution cluster and align near the almost immobilized contact line confining the drop,forming a narrow ring of *** individual cells move in and out of the ring continuously,certain flow patterns emerge in the inter-bacterial *** reveal high-speed long-distance unidirectional flows with definite chirality along the outside of the ring,along the inside of the ring and across the *** speculate that these flows enable the fast and efficient transport,facilitating the communication and unification of the bacterial community.

关键词： Bacterial droplet Environmental stress Single particle tracking Biological edge Flow transport network