检索结果-南通市图书馆

Experimental Study on Ratio and Performance of Coal Gangue/Bottom Ash Geopolymer Double-Liquid Grouting Material

在线全文

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2023年第7期11卷 3073-3089页

作者： Wenqi Zhao Wenbin Sun Zhenbo Cao jianbang hao College of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao266590China State Key Laboratory of Coal Mining and Clean Utilization China Coal Research InstituteBeijing100013China College of Earth and Mineral Sciences Pennsylvania State University—University ParkState CollegePA 16801USA

Mine grouting reinforcement and water plugging projects often require large amounts of grouting *** reduce the carbon emission of grouting material production,improve the utilization of solid waste from mining enterprises,and meet the needs of mine reinforcement and seepage control,a double-liquid grouting material containing a high admixture of coal gangue powder/bottom ash geopolymer was *** setting time,fluidity,bleeding rate,and mechanical properties of grouting materials were studied through laboratory tests,and SEM analyzed the microstructure of the *** results show that the total mixture of calcined gangue does not exceed 60%.And the proportion of bottom ash replacing cement should be within 30%.At the same time,the volume mixture of sodium silicate is 20%.And the water-solid ratio does not exceed *** stability of the slurry prepared under this ratio is *** microstructure of the stone body is dense,and its strength can meet the requirements of rock reinforcement and seepage *** economic and environmental benefits are more significant than the traditional cement-silicate double-liquid grouting material.

关键词： Coal gangue municipal solid waste sodium silicate double liquid grouting material

渐进式与探索式复合教学模式在大学物理实验教学中的实践

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

物理通报 2024年第10期 5-8页

作者：杨颢李东郑建邦西北工业大学物理科学与技术学院光场调控与信息感知工业和信息化部重点实验室陕西省光学信息技术重点实验室超常条件材料物理与化学教育部重点实验室陕西西安710129

探索渐进式教学内容体系和分组探索式教学模式改革对学生物理实验技能及创新能力的影响.结合近代物理拓展实验以及物理实验技能竞赛,研究对比了改革试点班级与非试点班级在物理实验技能方面的表现差异,并通过数据分析初步验证了改革措... 详细信息

探索渐进式教学内容体系和分组探索式教学模式改革对学生物理实验技能及创新能力的影响.结合近代物理拓展实验以及物理实验技能竞赛,研究对比了改革试点班级与非试点班级在物理实验技能方面的表现差异,并通过数据分析初步验证了改革措施的有效性.研究结果可为我国创新实践型人才培养模式改革提供新的思路.

关键词：大学物理实验创新能力培养教学模式改革渐进式与探索式

Characterization of time-and size-dependent particle emissions and decay from cooking oil fumes in residence:Impacts of various intervention measures

在线全文

学校读者我要写书评

暂无评论

Building Simulation 2023年第7期16卷 1149-1158页

作者： jianbang Xiang Linmin Hu Jiayuan hao Siqing Wu Jianping Cao Edmund Seto School of Public Health(Shenzhen) Sun Yat-sen UniversityShenzhenGuangdong 518107China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Division of Environmental Health University of Southern CaliforniaLos AngelesCA 90032USA School of Medicine Sun Yat-sen UniversityShenzhenGuangdong 518107China School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhouGuangdong 510006China Department of Environmental and Occupational Health Sciences University of WashingtonSeattleWA 98195USA

The dynamic characteristics of cooking-related particle size distributions in real-world settings are not fully *** a real-world campaign in a naturally-ventilated apartment in the northwest US,this study investigates the temporal profiles of size-resolved particle number concentrations(PNCs)ranging from 0.3 to 10µm from frying cooking *** cooking scenarios included various combinations of window ventilation,venting range hood(VRH)use,and portable air cleaner(PAC)*** a standardized pan-frying protocol throughout seven scenarios,real-time PNCs of 16-size bins were measured in the *** PNCs were empirically compared among size bins,periods,and *** most abundant size ranges of cooking-related particles were 0.3–0.579µm in number(45%–71%of the total)and 2.685–5.182µm in mass(48%–57%of the total).Compared with the scenario without any cooking-fume mitigating measures,keeping the kitchen windows open reduced the mean PNCs during and within 1-h after cooking for PM_(0.3-2.5),PM_(2.5-10),and PM_(0.3-10)by 78%,92%,and 79%,*** contrast,utilizing a VRH during cooking reduced the corresponding levels by 21%,69%,and 25%,*** with running the VRH,using a PAC in the kitchen led to additional reductions of 84%,88%,and 84%,***,the removal efficiencies of the three strategies generally increased with particle sizes.

关键词： cooking oil fumes size-resolved particles venting range hood window ventilation portable air cleaner

基于VARTM的碳纤维单向与三维编织混杂织物树脂灌注工艺

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

工程塑料应用 2024年第2期52卷 57-65页

作者：户迎灿张联合崔健谢金路王晓明任浩张健榜查一斌秦成张辉倪宇峰中车青岛四方机车车辆股份有限公司山东青岛266111 东华大学材料科学与工程学院纤维材料改性国家重点实验室上海201620 东华大学机械工程学院上海201620

为探究碳纤维单向与三维编织混杂增强环氧树脂基复合材料地铁转向架侧梁的树脂灌注成型工艺,首先基于渗透率理论模型采用非饱和径向流法分别测试得到碳纤维单向与三维编织织物的渗透率。通过数值模拟的方法对典型复合材料方形管结构进... 详细信息

为探究碳纤维单向与三维编织混杂增强环氧树脂基复合材料地铁转向架侧梁的树脂灌注成型工艺,首先基于渗透率理论模型采用非饱和径向流法分别测试得到碳纤维单向与三维编织织物的渗透率。通过数值模拟的方法对典型复合材料方形管结构进行缩比建模与网格划分,并利用PAM-RTM软件对树脂灌注成型过程进行仿真分析,预测了制备复合材料方管所需的灌注时间、灌注压力以及树脂流动过程缺陷的产生。最后根据模拟的灌注方案通过真空辅助树脂传递模塑(VARTM)成型工艺制备了碳纤维单向和三维编织混杂织物增强环氧树脂复合材料方管结构件。结果表明,通过PAM-RTM模拟VARTM工艺制备复合材料方管时树脂的流动,预测得到灌注时间为3897 s,VARTM工艺实际制备复合材料方管的灌注时间为4052 s,误差约为3.8%,在合理误差范围内。方管内部灌注压力随着与注胶口距离的增加而逐渐减小。模拟与实验的误差可能是由于实际铺层和灌注过程中树脂流动引起织物的剪切变形以及真空度的差异导致渗透性能产生变化。仿真模拟和实际制备复合材料方管均无明显缺陷产生,证明径向法织物渗透率的理论模型计算测试和仿真结果具有可靠性。

关键词：碳纤维复合材料真空辅助树脂传递模塑成型混杂织物树脂流动模拟

在线全文

学校读者我要写书评

暂无评论

麻杏石甘汤临床应用近况

河南中医 2024年第7期44卷 1000-1005页

作者：王丽军郝哲段立鸣张建帮王晓燕张中华中国人民解放军联勤保障部队第九八八医院河南郑州450042

麻杏石甘汤首载于《伤寒论》,具有辛凉疏表、清肺平喘之功,无论有汗、无汗均可使用。现已广泛应用于新型冠状病毒感染、肺炎、慢性阻塞性肺病、哮喘及荨麻疹等疾病,临床疗效较为确切,且安全性好,不良反应少。目前,虽然关于麻杏石甘汤单... 详细信息

麻杏石甘汤首载于《伤寒论》,具有辛凉疏表、清肺平喘之功,无论有汗、无汗均可使用。现已广泛应用于新型冠状病毒感染、肺炎、慢性阻塞性肺病、哮喘及荨麻疹等疾病,临床疗效较为确切,且安全性好,不良反应少。目前,虽然关于麻杏石甘汤单味药物的化学成分及药理作用研究较多,但对于整方的化学成分作用机制研究鲜有报道,整方化学成分作用的发挥与煎煮工艺、各组分剂量大小、不同产地药材质量等因素等有关。今后,可以将全方的药效物质基础及作用机制、体内代谢过程、起效成分之间配伍作用及质量控制标准等作为研究目标;其次,关于麻杏石甘汤临床试验的样本量较少,缺乏大样本试验数据,下一步应增加样本量,确证疗效的可信度与实效性;除此之外,还需针对不同病证作用机制进行研究,阐明中药通过多靶点参与其关键病理生理进程的机制,再依据异病同治的治法,按照方证相应理论,灵活加减配伍以与病证相适应,为拓展临床应用范围及相关制剂开发提供一定的理论依据。

关键词：麻杏石甘汤新型冠状病毒感染支气管炎肺炎慢性阻塞性肺疾病哮喘荨麻疹《伤寒论》张仲景

同方期刊数据库

益生元的功能性质及在抑制幽门螺杆菌中的应用研究

在线全文

学校读者我要写书评

暂无评论

中国食品添加剂 2024年第8期35卷 172-177页

作者：陈又铭李宁高学秀曹建帮宁占国赵战利郭浩刘梦璐山东星光首创生物科技有限公司德州253600

幽门螺杆菌感染是人类最常见的慢性感染病之一,与其相关的胃部疾病、肠道疾病如胃(肠)炎、胃溃疡、胃癌等均较为常见,对人体健康不利,目前已引起广泛关注。本文综述了益生元的功能性质、幽门螺杆菌的发展、危害以及益生菌与益生元在抑... 详细信息

幽门螺杆菌感染是人类最常见的慢性感染病之一,与其相关的胃部疾病、肠道疾病如胃(肠)炎、胃溃疡、胃癌等均较为常见,对人体健康不利,目前已引起广泛关注。本文综述了益生元的功能性质、幽门螺杆菌的发展、危害以及益生菌与益生元在抑制幽门螺杆菌的研究进展,为今后幽门螺杆菌抑制研究等方面奠定了理论基础。

关键词：益生菌益生元功能性质幽门螺杆菌

同方期刊数据库

Recent progress in the uncooled mid-infrared lead selenide polycrystalline photodetector

在线全文

学校读者我要写书评

暂无评论

Recent progress in the uncooled mid-infrared lead selenide p...

2015年（第七届）西部光子学学术会议

作者： hao Yang Lei Chen Ting Mei jianbang Zheng Shaanxi Key Laboratory of Optical Information Technology School of ScienceNorthwestern Polytechnical University

Currently, the uncooled Pb Se photodetectors in the mid-infrared range(2-5μm) with sensitization technology extract more photoelectric response than traditional ones, and enable the room temperature(300K) photo-detection with high detectivity, which have attracted wide attentions in many fields. This technology generally contains the film fabrication with vapor phase deposition(VPD) and a sensitizing process with doping of oxygen and iodine. Many works presented in the recent years almost provide and high temperature activation method with oxygen/iodine vapor diffusion, which reveal that oxygen or iodine plays an important role in the sensitization of Pb Se material. In this paper, we provide our latest experimental results and discussions in the stoichiometry of oxygen and iodine and its influence on the polycrystalline structure and photo-response. The experimental results revealed that crystal orientation was transformed from(200) to(420) by sensitization, and the responsivity of 5.42 A/W was gained by the optimal stoichiometry of oxygen and iodine with molecular density of I2 of .51×1012 mm-3 and oxygen pressure of Mpa. We verified that I2 plays a role in transporting oxygen into the lattice of crystal, which is actually not its major role. It is revealed that samples sensitized with iodine transform atomic proportion of Pb from 34.5% to 25.0% compared with samples without iodine from XPS data, which result in the proportion of about 1:1 between Pb and Se atoms by sublimation of Pb I2 during sensitization process, and Pb/Se atomic proportion is controlled by I/O atomic proportion in the polycrystalline grains, which is very an important factor for improving responsivity of unlooed Pb Se photodetector. Moreover, a novel sensitization and dopant activation method is proposed using oxygen ion implantation with low ion energy of <500eV and beam current of 20μA/cm2. These results may be helpful to understanding the sensitization mechanism of polycrystalline lead salt

关键词： polycrystalline Pb Se sensitization transport stoichiometry

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

多层有机薄膜太阳电池的结构优化

太阳能学报 2014年第3期35卷 516-521页

作者：王春锋郑建邦郝娟姜冰一曹崇德西北工业大学理学院陕西省光信息技术重点实验室西安710072

针对由CuPc/PTCDA/C60组成的3层有机薄膜太阳电池结构,基于光学干涉效应以及激子扩散理论,研究光波在多层薄膜中的传输特性,深入分析限制有机光伏效率的光吸收和激子扩散两个主要过程。利用Matlab软件从理论上对该结构中各层有机薄膜的... 详细信息

针对由CuPc/PTCDA/C60组成的3层有机薄膜太阳电池结构,基于光学干涉效应以及激子扩散理论,研究光波在多层薄膜中的传输特性,深入分析限制有机光伏效率的光吸收和激子扩散两个主要过程。利用Matlab软件从理论上对该结构中各层有机薄膜的厚度进行优化,从而可提高电池的外量子效率和光生电流密度,得到CuPc(4 nm)/PTCDA(23 nm)/C60(67 nm)的最佳膜厚组合,使得外量子效率达到34.67%,光生电流密度为0.1417 A/m2,稳态激子浓度分布显著增加,而未经优化的电池结构的外量子效率为9.7%,光生电流密度为0.1291 A/m2。

关键词：多层薄膜厚度外量子效率结构优化

在线全文

学校读者我要写书评

暂无评论

微波功率放大器发展概述

强激光与粒子束 2020年第7期32卷 66-73页

作者：李建兵林鹏飞郝保良孙建邦战略支援部队信息工程大学信息系统工程学院郑州450001 中国电子科技集团公司第十二研究所北京100015

微波功率放大器分为真空和固态两类,分别分析了两类器件的原理和特点,然后介绍了它们的发展历史、当前的技术研究状况和未来发展趋势。重点介绍了两种器件相结合的产物—微波功率模块,包括微波功率模块的产生过程和当前国内外的发展状况... 详细信息

微波功率放大器分为真空和固态两类,分别分析了两类器件的原理和特点,然后介绍了它们的发展历史、当前的技术研究状况和未来发展趋势。重点介绍了两种器件相结合的产物—微波功率模块,包括微波功率模块的产生过程和当前国内外的发展状况,并对未来的发展趋势进行了分析和预测。

关键词：微波功率放大器真空器件固态器件微波功率模块