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Nano Research 2024年第8期17卷 7013-7019页

作者： Haoran Wang Rongbo Sun Peigen Liu haohui hu Chen Ling Xiao Han Yi Shi Xusheng Zheng Geng Wu Xun Hong Center of Advanced Nanocatalysis(CAN) Department of Applied ChemistryHefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Sinochem Holdings Co Ltd Xiongan New AreaHebei 071700China National Synchrotron Radiation Laboratory(NSRL) University of Science and Technology of ChinaHefei 230029China

The electrochemical CO_(2) reduction reaction(CO_(2)RR)holds significant promise in advancing carbon *** catalysts for the electrochemical CO_(2)RR to multi-carbon(C_(2+))products(e.g.,C_(2)H_(4))under industrial-level current density is urgently needed and ***,we report the Cu_(2)O nanoparticles doped with interstitial carbon atoms(denoted as C-Cu_(2)O NPs)for the conversion of CO_(2) to C_(2+)*** interstitial carbon promotes the C-Cu_(2)O NPs to possess abundant unsaturated Cu–O bonds,leading to a high-density Cu^(δ+)(0<δ<1)*** obtained C-Cu_(2)O NPs exhibited significant Faradic efficiency(FE)of C_(2+) products approaching 76.9%and a partial current density reaching 615.2 mA·cm^(–2)under an industrial-level current density of 800 mA·cm^(–2).Furthermore,the efficient electrosynthesis of C_(2)H_(4) achieved an FE of 57.4%with a partial current density of 459.2 mA·cm^(–2).In situ electrochemical attenuated total reflection Fourier transform infrared spectroscopy and in situ Raman spectroscopy analyses revealed that C-Cu_(2)O NPs stabilized the intermediate*CO and facilitated C–C coupling,leading to increased selectivity towards C_(2+) products.

关键词： CO_(2) electroreduction C-C coupling interstitial carbon *CO coverage industrial-level current density

六旋翼无人机旋翼转动对测风准确性的影响研究

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实验流体力学 2019年第6期33卷 7-14页

作者：李正农胡昊辉沈义俊湖南大学建筑安全与节能教育部重点实验室长沙410082 华南理工大学土木与交通学院广州510641

旋翼无人机可以代替桅杆实现风场的定点或多点同时测量,但是旋翼转动引起的扰流会对测风的准确性产生影响。利用不同高度的支架,在六旋翼无人机上搭载超声波风速仪进行风洞试验,探究旋翼转动对无人机中心上方各高度处风场的影响以及不... 详细信息

旋翼无人机可以代替桅杆实现风场的定点或多点同时测量,但是旋翼转动引起的扰流会对测风的准确性产生影响。利用不同高度的支架,在六旋翼无人机上搭载超声波风速仪进行风洞试验,探究旋翼转动对无人机中心上方各高度处风场的影响以及不同风向角和机身倾斜对测量准确性的影响。结果表明:除个别工况外,旋翼转动均会引起较大的风速相对误差;旋翼转动引起的风速误差随高度呈先增大后减小的趋势;机身水平时,随高度增加,各工况下的风速绝对误差趋于一致,且控制风速大于6 m/s时,风速相对误差随风速增大而减小;旋翼转动对风向角测量基本没有影响。研究结果可为多旋翼无人机搭载测风仪器直接测风的实际应用提供参考。

关键词：旋翼无人机超声波风速仪风洞试验风向角

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基于无人机的复杂地貌上空风场实测研究

实验流体力学 2021年第2期35卷 92-103页

作者：吴红华张亮冯豪胡昊辉李正农湖南大学建筑安全与节能教育部重点实验室长沙410082

本文研究了利用多旋翼无人机搭载风速风向测量设备对不同地貌上空平面风场实测分析的方法。以北京市延庆区某试验基地内的测风塔为参考,首先对无人机测风准确性进行研究,其次取相同时间段内测风塔与不同测点位置无人机的实测风速风向数... 详细信息

本文研究了利用多旋翼无人机搭载风速风向测量设备对不同地貌上空平面风场实测分析的方法。以北京市延庆区某试验基地内的测风塔为参考,首先对无人机测风准确性进行研究,其次取相同时间段内测风塔与不同测点位置无人机的实测风速风向数据进行正交分解处理,分析得到无人机和测风塔风速、湍流度的相互比值关系,通过测风塔数据和比值关系,可以推知空中不同测点的风速和风向数据,进而获得复杂地貌影响下的上空风场状况。实测结果表明:修正后无人机平均风速、平均风向与测风塔相比误差较小,无人机测量得到湍流度较测风塔更大,通过滑动平均法可以一定程度上减小无人机测得的湍流度;空中平面风场状况受地貌影响较大,复杂地貌上空风场波动更大。通过现场实测,初步验证了应用多旋翼无人机搭载风速仪在不同地貌上空实现空中平面风场测量的可行性,可为局部区域风场测量、风电场微观选址等提供新思路和新方法。

关键词：多旋翼无人机风速风向风场现场实测复杂地貌

Hyperelastic model for polyacrylamide‑gelatin double network shape‑memory hydrogels

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Acta Mechanica Sinica 2021年第5期37卷 748-756,I0001页

作者： Yifu Chen haohui Zhang Jiehao Chen Guozheng Kang Yuhang hu George W Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlantaGA 30332USA Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and EngineeringSouthwest Jiaotong UniversityChengdu 610031China School of Chemical and Biomolecular Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

A shape-memory double network hydrogel consists of two polymer networks:a chemically crosslinked primary network that is responsible for the permanent shape and a physically crosslinked secondary network that is used to fix the temporary *** formation/melting transition of the secondary network serves as an effective mechanism for the double network hydrogel’s shape-memory *** the crosslinks in the secondary network are dissociated by applying an external stimulus,only the primary network is left to support the *** the secondary network is re-formed by removing the stimulus,both the primary and secondary networks support the *** the past,models have been developed for the constitutive behaviors of double network hydrogels,but the model of shape-memory double network hydrogels is still *** work aims to build a constitutive model for the polyacrylamide-gelatin double network shape-memory hydrogel developed in our previous *** model is first calibrated by experimental data of the double network shape-memory hydrogel under uniaxial loading and then employed to predict the shape-fixing performance of the *** model is also implemented into a three-dimension finite element code and utilized to simulate the shape-memory behavior of the double network hydrogel with inhomogeneous deformations related to applications.

关键词： Shape-memory hydrogel Double network Constitutive model Finite element simulation

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质子交换膜燃料电池平行流场可视化研究

江苏科技信息 2017年第3期34卷 52-54页

作者：黄浩晖章建波胡天恩陈大键邱成宁波海天驱动有限公司浙江宁波315800

文章设计了一种可视化的质子交换膜燃料电池平行流场,实验研究电池阴极侧的反应气体的流量、电池操作温度对电池性能和流场内排水情况的影响,实验得出:在60℃时,阴极侧的空气流量为600 m L/min,阳极侧氢气流量为800 m L/min时电池的排... 详细信息

文章设计了一种可视化的质子交换膜燃料电池平行流场,实验研究电池阴极侧的反应气体的流量、电池操作温度对电池性能和流场内排水情况的影响,实验得出:在60℃时,阴极侧的空气流量为600 m L/min,阳极侧氢气流量为800 m L/min时电池的排水效果最好,电池的性能也达到最好。

关键词：质子交换膜燃料电池可视化平行流场

Research activity does not affect nest predation rates of the Silver-throated Tit,a passerine bird building domed nests

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Avian Research 2020年第3期11卷 326-335页

作者： Qian hu Ye Wen Gaoyang Yu Jiangnan Yin haohui Guan Lei Lv Pengcheng Wang Jiliang Xu Yong Wang Zhengwang Zhang Jianqiang Li School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing 100083China School of Life Sciences Sun Yat-sen UniversityGuangzhou 510275China Key Laboratory of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China Department of Biological and Environmental Science College of AgriculturalLife and Natural SciencesAlabama A&M UniversityNormalAL 35762USA Ministry of Education Key Laboratory for Biodiversity Sciences and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijing 100875China

Background:Research activities have often been thought to potentially influence avian nesting success by increasing nest predation *** recent studies of species building open nests and cavity nests suggest that research disturbance does not generally induce nest predation,whether it is also the case in species building domednests remains *** birds,domed-nest species exist in about half of the passerine families,and research disturbance to the domed nests may differ from that to the nests of other types for their different nest ***:We investigated if research activities affected nest predation rate by analyzing the relationships of the daily nest survival rate with the research activities at the egg and nestling stages of a domed-nest species,the Silverthroated Tit(Aegithalos glaucogularis).Results:Our results showed that nest daily survival rate was significantly affected by the laying date and nest age during the egg stage,and by the hatching date only during the nestling *** contrast,there were no significant effects of research activities,in terms of visiting nests and filming nests,on the nest survival of the Silver-throated Tit at both the egg and nestling ***:Our results coincide with the findings in species building other types of nests that research activities do not always have negative effects on avian nesting success.

关键词： Aegithalos glaucogularis Nest filming Nest predation Nest survival Nest visit Research disturbance

CTA技术在心肌桥-壁冠脉血管形态学诊断中的应用价值

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临床医学工程 2024年第8期31卷 901-902页

作者：胡舸帆詹浩辉曹阿丹宋敏仝向莎宋丹刘刚河南科技大学第二附属医院影像中心河南洛阳471000

目的探讨螺旋CT血管造影(CTA)诊断心肌桥-壁冠状动脉(MB-MCA)血管形态学的价值。方法200例疑似MB-MCA患者均进行CTA和冠状动脉造影(CAG)检查,分析CTA技术对MB-MCA的诊断价值,对比CTA与CAG对浅在型、深在型MB-MCA心肌桥长度、壁冠脉狭窄... 详细信息

目的探讨螺旋CT血管造影(CTA)诊断心肌桥-壁冠状动脉(MB-MCA)血管形态学的价值。方法200例疑似MB-MCA患者均进行CTA和冠状动脉造影(CAG)检查,分析CTA技术对MB-MCA的诊断价值,对比CTA与CAG对浅在型、深在型MB-MCA心肌桥长度、壁冠脉狭窄程度的检查结果。结果CTA诊断MB-MCA的灵敏度为98.14%,特异度为89.74%,准确率为96.50%。CTA显示的浅在型与深在型MB-MCA患者的心肌桥长度均高于CAG(P0.05)。结论CTA诊断MB-MCA的灵敏度、特异度及准确率均较高,能够从多个角度对壁冠脉血管、管腔形态以及结构进行观察,明确心肌桥长度、壁冠脉狭窄程度等指标。

关键词：螺旋CT血管造影心肌桥-壁冠状动脉血管形态学诊断价值

High expression of BCL6 inhibits the differentiation and development of hematopoietic stem cells and affects the growth and development of chickens

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Journal of Animal Science and Biotechnology 2021年第3期12卷 904-916页

作者： Hongmei Li Bowen hu Shang hu Wen Luo Donglei Sun Minmin Yang Zhiying Liao haohui Wei Changbin Zhao Dajian Li Meiqing Shi Qingbin Luo Dexiang Zhang Qinghua Nie Xiquan Zhang Department of Animal Genetics Breeding and ReproductionCollege of Animal ScienceSouth China Agricultural UniversityGuangzhou 510642Guangdong ProvinceChina Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding and Key Lab of Chicken Genetics Breeding and ReproductionMinistry of AgricultureGuangzhou 510642GuangdongChina State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources South China Agricultural UniversityGuangzhou 510642GuangdongChina Division of Immunology Virginia-Maryland College of Veterinary MedicineUniversity of MarylandCollege ParkMDUSA

Background:B-cell CLL/lymphoma 6(BCL6)is a transcriptional master regulator that represses more than 1200 potential target *** previous study showed that a decline in blood production in runting and stunting syndrome(RSS)affected sex-linked dwarf(SLD)chickens compared to SLD ***,the association between BCL6 gene and hematopoietic function remains unknown in ***:In this study,we used RSS affected SLD(RSS-SLD)chickens,SLD chickens and normal chickens as research object and overexpression of BCL6 in hematopoietic stem cells(HSCs),to investigate the effect of the BCL6 on differentiation and development of ***:The results showed that comparison of RSS-SLD chickens with SLD chickens,the BCL6 was highly expressed in RSS-SLD chickens bone *** bone marrow of RSS-SLD chickens was exhausted and red bone marrow was largely replaced by yellow bone marrow,bone density was reduced,and the levels of immature erythrocytes in peripheral blood were *** the same time,the hematopoietic function of HSCs decreased in RSS-SLD chickens,which was manifested by a decrease in the hematopoietic growth factors(HGFs)EPO,SCF,TPO,and IL-3,as well as hemoglobinα1 and hemoglobinβ***,mitochondrial function in the HSCs of RSS-SLD chickens was damaged,including an increase in ROS production,decrease in ATP concentration,and decrease in mitochondrial membrane potential(ΔΨm).The same results were also observed in SLD chickens compared with normal chickens;however,the symptoms were more serious in RSS-SLD ***,after overexpression of the BCL6 in primary HSCs,the secretion of HGFs(EPO,SCF,TPO and IL-3)was inhibited and the expression of hemoglobinα1 and hemoglobinβwas ***,cell proliferation was accelerated,apoptosis was inhibited,and the HSCs entered a cancerous *** function of mitochondria was also abnormal,ROS production was decreased,and ATP concentration andΔΨm were increased,which was related t

关键词： BCL6 Hematopoietic stem cells Mitochondrial function Runting and stunting syndrome Sex-linked dwarf chickens

YSO coded aperture camera based on depth of interaction for location correction

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Radiation Detection Technology and Methods 2023年第4期7卷 589-598页

作者： Yiding Han Xiaopan Jiang haohui Tang Xiuzuo Liang Xuanhou hu Xianchao huang Zhiming Zhang Lei Shuai Jing Guo Long Wei Beijing Engineering Research Center of Radiographic Techniques and Equipment Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing100049China Jinan Laboratory of Applied Nuclear Science Jinan250131China CAEA Center of Excellence on Nuclear Technology Applications for Nuclear Detection and Imaging TaiyuanChina

Purpose Coded aperture imaging was a widely used imaging method for radiation ***,the traditional gamma camera based on two-dimensional projection information for coded aperture imaging ignored the influence of the interaction depth of particles and detectors on the projection information,which reduced the imaging quality of the camera to some ***,a method of correcting the coded gamma camera based on the interaction depth of particles and detectors is proposed to improve the location accuracy of *** The camera developed in this work uses a 7×7 YSO crystal array coupled with two 7×7 Si-PM *** crystal is evenly divided into 11 parts in the depth direction,with a voxel size of 3×3×3 *** coded mask is a 13×13 array,which is a mosaic of two cycles of 7×7 modified uniformly redundant array *** depth resolution of the detector is obtained via the subsurface laser engraving dual-end readout *** obtaining the three-dimensional position information of the interaction point the projection information obtained by the detector is layered,and the image is *** to the spatial position information of the detector and the coded mask,the corresponding field of view of each layer of the detector is calculated,and the reconstructed image of each layer is amplified and superimposed according to the ratio of the field of view to obtain the reconstructed image combined with the depth *** and conclusion According to Monte Carlo simulation and radiation source imaging experiment results,this method can effectively improve the positioning ability of the *** the experimental scenario mentioned in the paper,the location accuracy can be improved by up to 1.54°.

关键词： Depth of interaction Coded aperture gamma camera YSO detector Location accuracy

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车载锂离子动力电池组环境特性分析

环境化学 2022年第2期41卷 600-608页

作者：薛冰娅胡宇辰吴昊慧郁亚娟北京理工大学材料学院能源与环境材料系北京100081

虽然电动汽车在行驶阶段不直接排放温室气体,但是车载锂离子动力电池组在生产阶段的环境影响不容忽视.本研究以11个不同的车载锂离子电池组作为研究对象,将环境特性指标引入动力电池组的综合环境评价领域.结合生命周期评价框架,总结出... 详细信息

虽然电动汽车在行驶阶段不直接排放温室气体,但是车载锂离子动力电池组在生产阶段的环境影响不容忽视.本研究以11个不同的车载锂离子电池组作为研究对象,将环境特性指标引入动力电池组的综合环境评价领域.结合生命周期评价框架,总结出包含足迹家族类指标、资源耗竭类指标和毒性损害类指标的评价体系.采取灰色关联和熵权组合赋权法计算权重.详细分析了锂离子电池不同成分在生产阶段的综合环境影响.结果表明,对于综合环境评价中的足迹家族指标,FeS_(2)SS电池组在碳足迹和生态足迹的环境潜值最小;对于资源耗竭指标,FeS_(2)SS在酸化潜势、富营养化潜势和光化学氧化方面的环境潜值最小,而在非生物性耗竭和臭氧层损耗方面的潜值也较小;对于毒性损害指标,FeS_(2)SS在人类非致癌毒性和生态毒性方面的潜值最小,其人类致癌毒性仅高于Li-S电池.对于环境特性指标,FeS_(2)SS电池组得分最高,表明其在生产阶段更为绿色环保.

关键词：电动汽车锂离子电池组生命周期评价环境特性指数