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Facile fabrication of CdIn_(2)S_(4)/TiO_(2)heterojunction for enhanced solar light efficient CO_(2)reduction

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Frontiers of Chemical Science and Engineering 2024年第9期18卷 101-112页

作者： Xiaoyu Ma Longlong Wang Houde She Yu Zhou Lei Wang jingwei huang Qizhao Wang College of Chemistry and Chemical Engineering Northwest Normal UniversityLanzhou 730070China School of Environment Science and Engineering Chang’an UniversityXi’an 710064China

Photocatalytic CO_(2)reduction is a promising solution to simultaneously provide renewable chemical fuels and address the greenhouse ***,designing practical photocatalysts with advanced architectures remains ***,we report the preparation of a novel CdIn_(2)S_(4)/TiO_(2)binary heterojunction via an in situ solvothermal approach,which exhibits superior photocatalytic activity for sunlight-driven CO_(2)*** CdIn_(2)S_(4)/TiO_(2)composites exhibit significantly enhanced photocatalytic performance for CO_(2)reduction compared to unmodified TiO_(2).Among them,the 3%CdIn_(2)S_(4)/TiO_(2)composite has optimal CO and CH_(4) evolution rates of 18.32 and 1.03μmol·g–1·h–1,*** yield of CO is 4.7 times higher than that of pristine TiO_(2).This improved photocatalytic activity of the CdIn_(2)S_(4)/TiO_(2)heterostructure can be attributed to its large surface area,extended light absorption range and high separation efficiency of photogenerated electron-hole pairs,which are supported by the results of photoluminescence spectroscopy and the photoelectrochemical ***,the photocatalytic mechanism based on the binary CdIn_(2)S_(4)/TiO_(2)heterojunction is proposed and separation process of photogenerated electron-hole pairs is *** brief,we aim to provide insights into the application of TiO_(2)in energy conversion processes through the construction of heterogeneous junctions.

关键词： TiiO_(2) CdIn_(2)S_(4) heterojunction photocatalytic CiO_(2)reduction

Silicon Mitigates Aluminum Toxicity of Tartary Buckwheat by Regulating Antioxidant Systems

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Phyton-International Journal of Experimental Botany 2024年第1期93卷 1-13页

作者： Anyin Qi Xiaonan Yan Yuqing Liu Qingchen Zeng Hang Yuan huange huang Chenggang Liang Dabing Xiang Liang Zou Lianxin Peng Gang Zhao jingwei huang Yan Wan Key Laboratory of Coarse Cereal Processing Ministry of Agriculture and Rural AffairsSichuan Engineering&Technology Research Center of Coarse Cereal IndustrializationCollege of Food and Biological EngineeringChengdu UniversityChengdu610106China Research Center of Buckwheat Industry Technology School of Life SciencesGuizhou Normal UniversityGuiyang550001China

Aluminum (Al) toxicity is a considerable factor limiting crop yield and biomass in acidic soil. Tartary buckwheatgrowing in acidic soil may suffer from Al poisoning. Here, we investigated the influence of Al stress on the growthof tartary buckwheat seedling roots, and the alleviation of Al stress by silicon (Si), as has been demonstrated inmany crops. Under Al stress, root growth (total root length, primary root length, root tips, root surface area, androot volume) was significantly inhibited, and Al and malondialdehyde (MDA) accumulated in the root tips. At thesame time, catalase (CAT) and ascorbate peroxidase activities, polyphenols, flavonoids, and 1,1-diphenyl-2-picrylhydrazyl(DPPH) and 2,2′-azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS) free-radical scavenging abilitywere significantly decreased. After the application of Si, root growth, Al accumulation, and oxidative damage wereimproved. Compared to Al-treated seedlings, the contents of ·O2− and MDA decreased by 29.39% and 25.22%,respectively. This was associated with Si-induced increases in peroxidase and CAT enzyme activity, flavonoidcompounds, and free-radical scavenging (DPPH and ABTS). The application of Si therefore has positive effectson Al toxicity in tartary buckwheat roots by reducing Al accumulation in the roots and maintaining oxidationhomeostasis.

关键词： Tartary buckwheat aluminum stress silicon root growth oxidative stress

重建“附近”:社会工作机构参与农村养老服务的在地化路径

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浙江学刊 2024年第4期 146-152页

作者：张翠娥黄经纬华中农业大学文法学院武汉4430070

在推进实施积极应对人口老龄化战略和共同富裕进程中,中国农村养老服务面临着社会化的在地困境,需要专业社会力量参与。社会工作机构有效参与农村养老服务的在地化实践路径是在“人在场境”的行动框架下重建“附近”,在人和场境的弱连... 详细信息

在推进实施积极应对人口老龄化战略和共同富裕进程中,中国农村养老服务面临着社会化的在地困境,需要专业社会力量参与。社会工作机构有效参与农村养老服务的在地化实践路径是在“人在场境”的行动框架下重建“附近”,在人和场境的弱连接处开展服务治理:一是兼顾农村老人的差序性需求,激活“附近”的能动主体;二是建设多主体联动的半熟人社区,找回“附近”的社会资本;三是建构“合作型经纪”角色,重建“附近”的生态联结。

关键词：社会工作机构农村养老人在场境社会资本

欧盟社会性科学议题开放教学资源的设计与应用——以ENGAGE科学教育项目为例

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比较教育学报 2024年第1期 164-175页

作者：邴杰黄镜玮刘恩山北京师范大学生命科学学院北京100875 湖南省长沙市雅礼洋湖实验中学生物组长沙410036

创新驱动发展是21世纪科学教育面临的重要挑战之一。欧洲教育委员会在“负责任的研究与创新”的价值引领下,开展了一系列基于社会性科学议题教学的相关项目研究,其中ENGAGE项目的影响力最为深远,该项目聚焦6-8年级阶段学生认知,开发了... 详细信息

创新驱动发展是21世纪科学教育面临的重要挑战之一。欧洲教育委员会在“负责任的研究与创新”的价值引领下,开展了一系列基于社会性科学议题教学的相关项目研究,其中ENGAGE项目的影响力最为深远,该项目聚焦6-8年级阶段学生认知,开发了覆盖物理、化学、地理和生物等领域的30个教学案例,结合5E教学模式,关注多维目标整合;重视负责任的科学研究与创新,基于探究实践、论证推理等科学实践活动组织教学内容;在评价上注重学生学习过程的评价。针对我国科学教育义务教育阶段课程标准的要求,在开发社会性科学议题教学资源时需锚定新兴领域,主题筛选聚焦社会性科学议题内涵特征;围绕课程需要制定教学目标,关注大概念和多维探究技能融合;要基于学生认知规律和科学探究组织灵活性、可行性的教学内容;实时做好追踪记录,侧重学生的学习过程评价。同时在借鉴国外开放教学资源时,要根据本土实际作出适合与我国社会主义核心价值体系相一致的调整,有选择性地筛选并能结合本土案例的适宜主题,围绕课程和教学要求制定教学目标和教学策略,合理规划教学实践活动并及时反思改进教学案例。

关键词：社会性科学议题教学科学教育开放资源教学案例

双流制牵引供电系统在市域(郊)铁路中应用探讨

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电气化铁道 2024年第4期35卷 91-94页

作者：王昶黄经纬中铁华铁工程设计集团有限公司

双流制牵引供电系统在市域(郊)铁路中应用,标志着干线铁路、城际铁路、市域(郊)铁路和城市轨道交通的“四网融合”。本文通过对双流制牵引供电系统特点、双流制列车牵引传动系统工作原理、双流制列车通过中性段切换原理、双流制牵引供... 详细信息

双流制牵引供电系统在市域(郊)铁路中应用,标志着干线铁路、城际铁路、市域(郊)铁路和城市轨道交通的“四网融合”。本文通过对双流制牵引供电系统特点、双流制列车牵引传动系统工作原理、双流制列车通过中性段切换原理、双流制牵引供电系统中性段处弓网故障及列车中性段切换故障原因进行分析,采用静态、动态、交直流切换检测试验,预防双流制列车在中性段发生故障,提高双流制牵引供电系统运行安全性和可靠性。

关键词：双流制牵引供电系统牵引传动系统中性段市域(郊)铁路

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融合特征加权注意力的火焰检测

安全与环境学报 2024年第1期24卷 159-168页

作者：杨国亮龚志鹏杨浩李林森黄经纬江西理工大学电气工程与自动化学院江西赣州341000

针对基于图像处理的火焰检测方法检测精度不高,存在误检和漏检等问题,提出一种融合目标提取和特征加权注意力的火焰检测算法。首先,通过YCrCb色彩空间色度分离算法将火焰及火焰颜色相似物提取,滤除无关背景信息,减少模型训练时间,加快... 详细信息

针对基于图像处理的火焰检测方法检测精度不高,存在误检和漏检等问题,提出一种融合目标提取和特征加权注意力的火焰检测算法。首先,通过YCrCb色彩空间色度分离算法将火焰及火焰颜色相似物提取,滤除无关背景信息,减少模型训练时间,加快网络收敛;其次,在空间域上构建火焰颜色特征加权注意力机制(Flame Color-weighted Attention, FCA),使模型更加关注火焰目标,提高网络检测精度;最后,使用计算量更为经济的幻影卷积(Ghost Convolution)替换原有普通卷积,以降低网络计算量,减小模型参数量。试验结果显示,改进算法的精确率和平均精确率比原算法分别提高1.4百分点和0.9百分点,参数量比原模型减少了17.24%。此外,改进后的检测模型在不同场景下的实际检测效果较原模型有所改善,检测速度可满足实时性要求,能更好地应用于火灾防控任务。

关键词：公共安全目标检测目标提取注意力机制 YOLOv5s算法

疑诊原发性甲状旁腺功能亢进症的患者术前^(99m)Tc-MIBI SPECT/CT显像结果的影响因素分析

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首都医科大学学报 2024年第1期45卷 31-35页

作者：郭月红黄京伟张腾杨敏福首都医科大学附属北京朝阳医院核医学科北京100020

目的探讨疑诊原发性甲状旁腺功能亢进症(primary hyperparathyroidism,PHPT)的患者术前^(99m)Tc-甲氧基异丁基异腈(methoxyisobutylisonitrile,MIBI)单光子发射计算机断层扫描/计算机断层扫描(single-photon emission computed tomography/computed tomography,SPECT/CT)(以下简称MIBI SPECT/CT)显像结果的影响因素。方法将2019年1月至2023年8月于首都医科大学附属北京朝阳医院疑诊PHPT并在术前完善甲状旁腺MIBI SPECT/CT显像的257例患者作为研究对象。比较MIBI SPECT/CT显像阳性组和阴性组的实验室检查、病理特征及影像特征。采用多因素Logistic回归分析MIBI SPECT/CT显像结果的影响因素。结果单因素分析显示,与阴性组相比,血清总钙、血清甲状旁腺激素(parathyroid hormone,PTH)、碱性磷酸酶(alkaline phosphatase,ALP)水平在阳性组显著升高(P<0.05);病灶的病理类型、最大径、体积及位置在两组间差异有统计学意义(P<0.05)。多因素Logistic回归分析显示,术前血清PTH水平、病灶病理类型、位置及最大径与MIBI SPECT/CT显像结果阳性显著相关(P<0.05)。结论疑诊PHPT患者术前MIBI SPECT/CT显像结果受多重因素影响,术前血清PTH水平、病灶病理类型、位置及最大径是MIBI SPECT/CT显像结果的独立影响因素。

关键词：原发性甲状旁腺功能亢进症(PHPT) ^(99m)Tc-甲氧基异丁基异腈(MIBI) SPECT/CT

A Comparative Study on the Microstructure and Properties of ITO Targets and Thin Films Prepared from Two Different Powders

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Acta Metallurgica Sinica(English Letters) 2021年第5期34卷 675-693页

作者： Fangsheng Mei Tiechui Yuan Ruidi Li jingwei huang Powder Metallurgy Research Institute Central South UniversityChangsha410083China Science and Technology on High Strength Structural Materials Laboratory Central South UniversityChangsha410083China

With the rapid development of indium tin oxide(ITO)in the electronic display industry,choosing which raw powders to prepare high-quality ITO targets has always been a controversial *** the work,in order to clearly understand the effect of the raw powders on the microstructure and properties of ITO targets and thin films,tin-doped indium oxide(dITO)and In_(2)O_3-SnO_(2)mixed(mITO)powders were chosen to prepare ITO targets for depositing the films and a comparative study on their microstructure and properties was *** is found that,(1)dITO targets possess a higher solid solubility of tin in indium oxide and more uniform elemental distribution,while there are a higher density,a finer grain size and a higher mass ratio of In_(2)O_3 to SnO_(2)for the mITO targets;(2)dITO films with more coarser columnar grains and a rougher surface prefer to grow along the[100]direction in an Ar atmosphere;(3)the conductive property of ITO films only depends on the doping amount of tin and is independent of the raw powders and the preparation process of the target source;(4)dITO films possess the superior optical property and narrower optical band gap;(5)the etching property of mITO films is superior to that of dITO films due to the lower solid solubility of tin in indium oxide.

关键词： Tin-doped indium oxide In_(2)O_3-SnO_(2) mixed powder Solid solubility of tin in indium oxide Photoelectric property Etching property

Construction of ternary CuO/CuFe_(2)O_(4)/g-C_(3)N_(4)composite and its enhanced photocatalytic degradation of tetracycline hydrochloride with persulfate under simulated sunlight

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Journal of Environmental Sciences 2022年第2期34卷 59-70页

作者： Lei Wang Xiaolei Ma Guofang huang Rui Lian jingwei huang Houde She Qizhao Wang Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials College of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China School of Environmental Science and Engineering Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of EducationChang'an UniversityXi'an 710054China

In this study,a graphitic carbon nitride(g-C_(3)N_(4))based ternary catalyst Cu O/Cu Fe_(2)O_(4)/gC_(3)N_(4)(CCCN)is successfully prepared thorough calcination *** confirming the structure and composition of CCCN,the as-synthesized composites are utilized to activate persulfate(PS)for the degradation of organic *** using tetracycline hydrochloride(TC)as pollutant surrogate,the effects of initial p H,PS and catalyst concentration on the degradation rate are systematically *** the optimized reaction condition,CCCN/PS is able to give 99%degradation extent and 74%chemical oxygen demand removal in assistance of simulated solar light,both of which are apparently greater than that of either Cu O/Cu Fe_(2)O_(4)and pristine g-C_(3)N_(4).The great improvement in degradation can be assignable to the effective separation of photoinduced carriers thanks to the integration between Cu O/Cu Fe_(2)O_(4)and g-C_(3)N_(4),as well as the increased reaction sites given by the g-C_(3)N_(4)***,the scavenging trials imply that the major oxidative matters involved in the decomposition are hydroxyl radicals(·OH),superoxide radicals(·O_(2)^(-))and photo-induced holes(h^(+)).

关键词： Copper ferrite Graphitic carbon nitride Heterojunction photocatalyst Peroxydisulfate Tetracycline hydrochloride