检索结果-南通市图书馆

创新拓展班“大学化学”自适应拓展教学的探索

在线全文

学校读者我要写书评

暂无评论

山东化工 2017年第7期46卷 179-180,182页

作者：楚增勇李效东李义和王孝杰王春华国防科学技术大学理学院湖南长沙410073

拔尖创新人才是指具有厚实的专业基础、宽广的国际视野和超强的实践动手能力的厚博精深型人才。针对国防科学技术大学钱学森创新拓展班学员深厚的知识功底与强化拓展培养的需求,借鉴自适应教学这种典型的因材施教、以学习者为中心的教... 详细信息

拔尖创新人才是指具有厚实的专业基础、宽广的国际视野和超强的实践动手能力的厚博精深型人才。针对国防科学技术大学钱学森创新拓展班学员深厚的知识功底与强化拓展培养的需求,借鉴自适应教学这种典型的因材施教、以学习者为中心的教学活动,在"大学化学"教学过程中进行了教学内容、学习内容、考试内容等自适应拓展教学的探索。

关键词：钱学森创新拓展班拔尖创新人才自适应教学拓展教学

海绵城市建设对土壤污染物的削减效应研究——以四川省遂宁市海绵城市试点建设区为例

在线全文

学校读者我要写书评

暂无评论

城市地质 2020年第1期15卷 34-39页

作者：方宏宇冯文凯黎一禾魏昌利成都理工大学地质灾害防治与地质环境保护国家重点试验室四川成都610059 四川省地质调查院四川成都610081

本文以全国首批海绵城市试点建设区--四川省遂宁市为研究对象,进行土壤重金属污染的跟踪调查研究,通过对比海绵城市建设前后7种常见土壤重金属Sn、Cu、Zn、Cd、Pb、As、Hg的ICP-MS法和原子荧光法检测结果,探究海绵城市建设对区内土壤重... 详细信息

本文以全国首批海绵城市试点建设区--四川省遂宁市为研究对象,进行土壤重金属污染的跟踪调查研究,通过对比海绵城市建设前后7种常见土壤重金属Sn、Cu、Zn、Cd、Pb、As、Hg的ICP-MS法和原子荧光法检测结果,探究海绵城市建设对区内土壤重金属污染的削减情况以及各重金属离子表现出的敏感性。结果表明:建设完成后区内土壤重金属含量明显低于建设前,重金属污染程度降低且削减效应明显,典型海绵结构的生物修复净化功能和渗透排水功能使得土壤中的重金属污染物含量减少;同时所检测的7种常见重金属Sn、Cu、Zn、Cd、Pb、As、Hg分别对污染物的削减效应表现出不同的敏感性,其中金属汞(Hg)最高,金属铜(Cu)敏感性最低;最后结合相应原则给出了土壤重金属污染的防治建议和措施。

关键词：海绵城市海绵城市建设污染物土壤重金属

新型捕收剂DWD-3用于司家营一期混磁精反浮选脱硅

在线全文

学校读者我要写书评

暂无评论

金属矿山 2016年第12期45卷 105-108页

作者：郭文达朱一民韩跃新王鹏魏以和李艳军东北大学资源与土木工程学院辽宁沈阳110819 武汉工程大学资源与土木工程学院湖北武汉430073

铁矿选矿厂使用脂肪酸类阴离子捕收剂反浮选铁矿物,存在捕收剂用量大、所需浮选温度高、浮选指标差等问题。东北大学研发了一种新型酰胺基羧酸捕收剂DWD-3,并应用于司家营混磁精反浮选脱硅。实验室试验结果表明,在浮选温度为25℃,粗选矿... 详细信息

铁矿选矿厂使用脂肪酸类阴离子捕收剂反浮选铁矿物,存在捕收剂用量大、所需浮选温度高、浮选指标差等问题。东北大学研发了一种新型酰胺基羧酸捕收剂DWD-3,并应用于司家营混磁精反浮选脱硅。实验室试验结果表明,在浮选温度为25℃,粗选矿浆pH=11.5、DWD-3用量为400 g/t、CaCl_2用量为400 g/t、玉米淀粉用量为1 000 g/t时,经1粗1精3扫闭路反浮选,能获得精矿铁品位66.48%、回收率80.32%,尾矿铁品位16.35%的指标。以捕收剂DWD-3代替现场捕收剂GK-68可使浮选温度由40℃降至25℃,并且精矿铁品位提高了0.39个百分点、回收率提高了2.23个百分点,尾矿铁品位降低了1.57个百分点。对浮选产品分析表明,精矿中存在20μm以下的紧密连生体;尾矿中有大量较大颗粒连生体,且连生体中铁矿物与脉石部分相互浸染连生,是尾矿铁品位较高的原因。

关键词：捕收剂DWD-3 混磁精反浮选

Phosphorus-doped Ni–Co sulfides connected by carbon nanotubes for flexible hybrid supercapacitor

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2023年第5期17卷 491-503页

作者： Shengwang Su li Sun Feng Xie Jialong Qian yihe Zhang Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastesNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China

As promising electrode materials for supercapacitors,nickel-cobalt bimetallic sulfides render the advantages of abundant redox reactions and inherently high ***,in general,unsatisfactory performance of low specific capacity,low rate capability,and fast capacity loss exist in Ni–Co sulfide ***,we rationally regulate phosphorus-doped nickel–cobalt sulfides(P-NCS)to enhance the electrochemical performance by gas–solid ***,carbon nanotubes(CNTs)as conductive additives are added to improve the cycle stability and conductivity and form the composite P-NCS/C/*** to density functional theory,more electrons near the Fermi surface of P-NCS are demonstrated notionally than those of simple *** results manifest that P-NCS/C/CNT exhibits superior electrochemical performance,e.g.,high specific capacity(932.0 C·g^(-1)at 1 A·g^(-1)),remarkable rate capability(capacity retention ratio of 69.1%at 20 A·g^(-1)),and lower charge transfer *** importantly,the flexible hybrid asymmetric supercapacitor is assembled using P-NCS/C/CNT and activated carbon,which renders an energy density of 34.875 W·h∙kg^(-1)at a power density of 375 W∙kg^(-1).These results show that as-prepared P-NCS/C/CNT demonstrates incredible possibility as a battery-type electrode for high-performance supercapacitors.

关键词： cobalt nickel sulfide phosphorus-doping hybrid supercapacitor carbon nanotube density functional theory

Recent advances in 2D semiconductor nanomaterials for photocatalytic CO_(2)reduction

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第7期16卷 8542-8569页

作者： Tong li Hongwei Huang Shuobo Wang Yan Mi yihe Zhang Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China Goods and Material Department of CASIC Tertiary Research Institute China Aerospace Science and Industrial CorporationBeijing 100074China Key Laboratory of Chemistry and Engineering of Forest Products State Ethnic Affairs CommissionGuangxi Key Laboratory of Chemistry and Engineering of Forest ProductsGuangxi Collaborative Innovation Center for Chemistry and Engineering of Forest ProductsGuangxi Minzu UniversityNanning 530006China

For decades,global warming and energy shortages have been two urgent problems in human *** solar-driven photocatalytic conversion of carbon dioxide(CO_(2))into hydrocarbon fuels is expected to become a technology to solve these ***-dimensional(2D)materials shine in the field of photocatalytic CO_(2)due to their layered structure,larger specific surface area,more active sites,and larger charge transfer *** article reviews the progress of CO_(2)reduction by several types of 2D materials in recent ***,the reduction of CO_(2)is difficult in terms of kinetics and thermodynamics,but it is found through theoretical calculations and experiments that 2D materials have certain advantages in the reduction of CO_(2).Then the preparation methods of 2D materials are summarized and a variety of 2D materials are discussed and ***,an outlook on the development trend of 2D materials is *** review aims to provide systematic and concise guidance for the design of 2D nanomaterials for photocatalytic CO_(2)reduction.

关键词： two-dimensional(2D)materials photocatalysis CO_(2)reduction charge separation reactive sites

Amorphous red phosphorus anchored on carbon nanotubes as high performance electrodes for lithium ion batteries

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

Nano Research 2018年第5期11卷 2733-2745页

作者： li Sun Yu Zhang Deyang Zhang Jingang liu yihe Zhang Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences Beijing 100083 China

Red phosphorus-carbon nanotube （P@CNT） composites were synthesized as anodes for advanced lithium ion batteries via a facile solution-based method at room temperature. In these composites, the entangled P@CNT nanostructure reduced the aggregation of both components and allowed their complete utilization in a synergetic manner. The highly conductive and porous CNT framework, along with the nanoscale red P particles intimately anchored on the CNT surface, conferred the composite with excellent ion/electron transport properties. Volume expansion within the red P particles was mitigated by their amorphous and nanoscale features, which can be well buffered by the soft CNTs, therefore maintaining an integrated electrode structure during cycling. When used as an anode in lithium ion batteries, the composite exhibited a reversible capacity of 960 mAh·g^-1 （based on the overall weight of the composite） after 120 cycles at 200 mA·g^-1. The composite also delivered excellent high-rate capability with capacities of 886, 847, and 784 mAh·g^-1 at current densities of 2,000, 4,000, and 10,000 mA·g^-1 respectively, which reveals its potential as a high performance anode for lithium ion batteries.

关键词： red phosphorus carbon nanotubes anode lithium ion battery

中医体质辨识护理配合温针灸治疗对中风患者后遗症的影响

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

中国社区医师 2021年第26期37卷 112-113页

作者：杨永江刘蕾盘雪娇李一鹤昆明市中医医院云南昆明650000

目的:分析中医体质辨识护理配合温针灸治疗中风患者后遗症的临床效果。方法:2018年1月-2020年1月收治中风后遗症患者70例,随机分为两组,各35例。对照组给予常规治疗;观察组给予中医体质辨识护理配合温针灸治疗。比较两组临床效果。结果... 详细信息

目的:分析中医体质辨识护理配合温针灸治疗中风患者后遗症的临床效果。方法:2018年1月-2020年1月收治中风后遗症患者70例,随机分为两组,各35例。对照组给予常规治疗;观察组给予中医体质辨识护理配合温针灸治疗。比较两组临床效果。结果:观察组治疗总有效率高于对照组,差异有统计学意义(P<0.05);观察组护理后日常生活能力(BI指数)评分显著高于对照组,且神经功能缺损(NIHSS)评分显著低于对照组,差异均有统计学意义(P<0.05)。结论:中医体质辨识护理配合温针灸治疗中风后遗症患者的疗效显著。

关键词：中医体质辨识护理温针灸中风患者后遗症临床效果

在线全文

学校读者我要写书评

暂无评论

不同降雨条件下典型海绵城市渗流场特征研究

成都大学学报（自然科学版） 2019年第4期38卷 442-446页

作者：黎一禾冯文凯白慧林魏昌利成都理工大学地质灾害防治与地质环境保护国家重点实验室四川成都610059 四川省地质调查院四川成都610081

利用有限元软件Geo-slope,以遂宁市河东新区海绵城市建设试点区内多级别音乐公园与透水停车场为研究对象建立非饱和二维剖面模型,对不同降雨强度、降雨持时下海绵结构渗流场变化特征进行数值模拟计算分析,发现不同降雨工况下地表各处仍... 详细信息

利用有限元软件Geo-slope,以遂宁市河东新区海绵城市建设试点区内多级别音乐公园与透水停车场为研究对象建立非饱和二维剖面模型,对不同降雨强度、降雨持时下海绵结构渗流场变化特征进行数值模拟计算分析,发现不同降雨工况下地表各处仍出现暂态饱和区,即不同类型海绵结构能有效缓解城市道路积水、内涝灾害;海绵设施以及附近区块降雨汇集、下渗量较大,促使地表以及地下水位附近的孔隙水压力增长速率加快(-50 kPa^5 kPa),但超过一定深度以后的孔隙水压力几无变化.

关键词：海绵城市渗流场孔隙水压力

Bimetallic NiCo2S4 Nanoneedles Anchored on Mesocarbon Microbeads as Advanced Electrodes for Asymmetric Supercapacitors

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2019年第2期11卷 229-243页

作者： Yu Zhang yihe Zhang Yuanxing Zhang Haochen Si li Sun Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences

Bimetallic Ni–Co sulfides are outstanding pseudocapacitive materials with high electrochemical activity and excellent energy storage performance as electrodes for high-performance *** this study,a novel urchin-like NiCo2S4@mesocarbon microbead(NCS@MCMB) composite with a core–shell structure was prepared by a facile two-step hydrothermal *** highly conductive MCMBs offered abundant adsorption sites for the growth of NCS nanoneedles,which allowed each nanoneedle to fully unfold without aggregation,resulting in improved NCS utilization and efficient electron/ion transferin the *** applied as an electrode material for supercapacitors,the composite exhibited a maximum specific capacitance of 936 Fg-1 at 1 Ag-1 and a capacitance retention of 94% after 3000 cycles at 5 Ag-1,because of the synergistic effect of MCMB and ***,we fabricated an asymmetric supercapacitor based on the NCS@MCMB composite,which exhibited enlarged voltage windows and could power a light-emitting diode device for several minutes,further demonstrating the exceptional electrochemical performance of the NCS@MCMB composite.

关键词： Bimetallic sulfides NiCo2S4 Nanoneedles Mesocarbon microbeads Asymmetric supercapacitor