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Isotropic or anisotropic screening in black phosphorous: Can doping tip the balance?

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Frontiers of physics 2020年第5期15卷 103-109页

作者： Zhi-Min Liu Ye Yang Yue Shao zheng Qin-Jun Chen Ye-Xin feng hunan Provincial Key Laboratory of Low-Dimensional Structural Physics&Devices School of Physics and ElectronicsHunan UniversityChangsha410082China

Black phosphorus(BP),a layered van der Waals(vdW)crystal,has umique in-plane band anisotropy and many resulting anisotropy properties such as the ffective mass,electron mobility,optical absorp-tion,thermal conductivity and plasmonie ***,whether anisotropic or isotropic charge screening exist in BP remains a controversial *** on first-principles calculations,we study the screening properties in both of single-layer and bulk BP,especially conoerning the role of *** charge doping,the single-layer and bulk phase BP show slight anisotropic *** and hole doping can increase the charge screening of BP and significantly change the relative static dielectric tensor elements along two different in-plane *** further study the charge density change induced by potassium(K)adatom near the BP surface,under different levels of charge *** calculated two-dimensional(2D)charge redlistribution patterns also confirm that doping can greatly ffect the screening feature and tip the balance between isotropic and anisotropice *** corroborate that screening in BP exhibits slight intrinsic anisotropy and doping has significant influenoe on its screening property.

关键词： first-principles calculation charge screening black phosphorus dielectric function doping

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淮阴抽水站进出水流道性能CFD分析

海河水利 2024年第5期 66-70页

作者：郭赞赞任轶昌魏胡雪枫江苏省灌溉总渠管理处江苏淮安223200 江苏省水利科教中心江苏南京210000

为充分了解淮阴抽水站进出水内部流态,满足抽水站加固改造设计要求,采用计算流体动力学方法(CFD),对淮阴抽水站进出水流道内部流场进行数值优化水力计算分析。结果表明,淮阴抽水站现有流道可获得较为理想的水力性能,虽然水力性能略低于... 详细信息

为充分了解淮阴抽水站进出水内部流态,满足抽水站加固改造设计要求,采用计算流体动力学方法(CFD),对淮阴抽水站进出水流道内部流场进行数值优化水力计算分析。结果表明,淮阴抽水站现有流道可获得较为理想的水力性能,虽然水力性能略低于同等泵站,但差异不大,本次加固改造可不进行进出水流道改造。

关键词：淮阴抽水站 CFD 流道流道损失

1例遗传性凝血因子Ⅶ缺乏症合并气胸患儿的护理

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医药高职教育与现代护理 2024年第4期7卷 334-336页

作者：张建胡波王津津邵帅薛峰中国医学科学院血液病医院/中国医学科学院血液学研究所/实验血液学国家重点实验室/国家血液系统疾病临床医学研究中心/细胞生态海河实验室重症医学诊疗中心天津300020 中国医学科学院血液病医院/中国医学科学院血液学研究所/实验血液学国家重点实验室/国家血液系统疾病临床医学研究中心/细胞生态海河实验室血栓止血诊疗中心天津300020

遗传性凝血因子Ⅶ缺乏症是一种罕见的遗传性出血性疾病,低龄患儿在凝血因子Ⅶ缺乏合并气胸的情况下如处理不当,则严重危及生命。该文总结了1例遗传性凝血因子Ⅶ缺乏症合并气胸的低龄患儿的护理体会。护理要点:密切观察病情、胸腔闭式引... 详细信息

遗传性凝血因子Ⅶ缺乏症是一种罕见的遗传性出血性疾病,低龄患儿在凝血因子Ⅶ缺乏合并气胸的情况下如处理不当,则严重危及生命。该文总结了1例遗传性凝血因子Ⅶ缺乏症合并气胸的低龄患儿的护理体会。护理要点:密切观察病情、胸腔闭式引流护理、外周静脉通路建立与维护、凝血因子治疗的用药护理、凝血功能监测、预防血栓及感染、心理护理、出院健康指导。经过积极治疗和精心护理,该患儿病情稳定,好转出院。

关键词：凝血因子Ⅶ缺乏症气胸患儿护理

Structures and hydrogen storage properties of RE-Mg-Ni-Mn-based AB2-type alloys prepared by casting and melt spinning

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Rare Metals 2019年第11期38卷 1086-1096页

作者： Yang-huan Zhang Zhong-hui Hou Ying Cai feng hu Yan Qi Dong-Liang Zhao Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010China Department of Functional Material Research Central Iron and Steel Research InstituteBeijing 100081China

To ameliorate the electrochemical hydrogen storage properties of RE-Mg-Ni-Mn-based AB2-type electrode alloys,La element was partially substituted by Ce,and La1-xCexMgNi3.5Mn0.5(x=0,0.1,0.2,0.3,0.4)alloys were fabricated by casting and melt *** effects of Ce content on structures and electrochemical hydrogen storage properties of prepared alloys were studied in *** show that the experimental alloys consist of LaMgNi4 and LaNi5 *** variation of Ce content,instead of changing phase composition,results in an obvious phase abundance change in the alloys,namely the amount of LaMgNi4 and LaNi5 phases,respectively,increases and decreases with Ce content ***,the partial substitution of Ce for La leads to that the lattice keeps constant,cell volumes clearly decreases and the alloy grains are markedly *** electrochemical measurements reveal that the as-cast and as-spun alloys obtain the maximum discharge capacities at the first cycling without any activation *** Ce content increasing,the discharge capacity of as-cast alloys visibly *** contrast,the as-spun alloys have the maximum discharge capacity *** substitution of Ce for La dramatically promotes the cycle ***,the electrochemical kinetic performances of as-cast and asspun alloys first increase and then decrease with Ce content increasing.

关键词： AB2-type alloy Ce substitution for La Melt spinning Electrochemical properties

Two factors affecting the success rate of the second non-invasive prenatal screening after initial no-call result: experience from a single tertiary center in China

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Chinese Medical Journal 2021年第12期134卷 1416-1421页

作者： Ying Lin Dong Liang Hang Li Chun-Yu Luo Ping hu zheng-feng Xu Department of Prenatal Diagnosis Women's Hospital of Nanjing Medical UniversityNanjing Maternity and Child Health Care HospitalNanjingJiangsu 210004China Center of Genetic Medicine Women's Hospital of Nanjing Medical UniversityNanjing Maternity and Child Health Care HospitalNanjingJiangsu 210004China

Background:One inevitable shortcoming of non-invasive prenatal screening(NIPS)/cell-free DNA(cfDNA)sequencing is the uninterpretable(“no-call”)result,which is mainly caused by an insufficient fetal *** study was performed to investigate the factors associated with a successful second NIPS in these cases and determine the optimal management for women with initial no-call ***:We retrospectively analyzed the data of women who underwent NIPS with initial no-call results due to an insufficient fetal fraction from 2017 to 2019 in our *** compared these women's maternal and pregnancy information with the data of women who had attained a successful second NIPS result and women who had received no-call results for a second ***:Among the 33,684 women who underwent NIPS,137 with a no-call result underwent a *** between the 87(63.50%)women with a successful retest and the other 50(36.50%)women showed a significant difference in both the initial fetal fraction and maternal body mass index(BMI),whereas the other factors showed no significant *** addition,with an initial fetal fraction of<2.00%,the retest success rate was very ***:We identified two major factors associated with a successful NIPS retest:the initial fetal fraction and the maternal *** findings suggest the need for specialized management for this subset of women and would be instructional for the counseling for these women.

关键词： Non-invasive prenatal screening Cell-free DNA No-call results Maternal body mass index Initial fetal fraction

不同湿度下番茄潜夜蛾的年龄-龄期两性生命表

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昆虫学报 2024年第1期67卷 78-89页

作者：张博晨许双叶吴梓情张蕊郑卫峰李娅郝赤庾琴山西农业大学植物保护学院太原030031 山西省植物保护检疫总站太原030031

【目的】明确湿度变化对番茄潜夜蛾Tuta absoluta生长发育和繁殖的影响。【方法】在室内相对湿度15%,35%,55%,75%和95%下测定番茄潜夜蛾发育历期、产卵前期、世代周期、幼虫存活率、成虫存活率和单雌产卵量等,制定其年龄-龄期两性生命表... 详细信息

【目的】明确湿度变化对番茄潜夜蛾Tuta absoluta生长发育和繁殖的影响。【方法】在室内相对湿度15%,35%,55%,75%和95%下测定番茄潜夜蛾发育历期、产卵前期、世代周期、幼虫存活率、成虫存活率和单雌产卵量等,制定其年龄-龄期两性生命表,利用年龄-龄期两性生命表计算其种群存活率、繁殖力、寿命期望值、繁殖值等种群参数。【结果】在相对湿度15%~95%范围内,相对湿度15%和95%下番茄潜夜蛾卵历期均显著长于相对湿度35%,55%和75%下的;4龄幼虫期随相对湿度升高先缩短后延长;雄成虫寿命随相对湿度升高而增加,相对湿度95%时雄成虫历期最长;雌成虫寿命在相对湿度75%时达到最大值;相对湿度95%下世代周期显著长于其他相对湿度下的;单雌产卵量随相对湿度升高而增加。相对湿度影响了雌成虫初产卵时间,相对湿度15%,35%,55%,75%和95%下其初产卵时间分别为31,27,27,27和31 d;种群年龄-特征净繁殖率和年龄-龄期-特征繁殖值均随相对湿度升高而增加,在95%时达最大值;内禀增长率和周限增长率随相对湿度升高先增后降,净增殖率随相对湿度升高而增加,平均世代周期随相对湿度升高先减后增。根据种群生命表参数预测未来60 d内种群动态结果表明,相对湿度95%条件下有利于番茄潜叶蛾种群数量的增加,相对湿度15%和95%度条件不利于种群世代的增加。通过线性拟合,不同相对湿度对卵和幼虫的存活率影响显著。【结论】实验设置相对湿度范围内,番茄潜夜蛾生长发育最适相对湿度为55%和75%,繁殖最适宜相对湿度为95%。

关键词：番茄潜夜蛾相对湿度年龄-龄期两性生命表生长发育繁殖

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献血者归队成功率与再献血率相关因素研究

全科医学临床与教育 2024年第8期22卷 751-753,758页

作者：胡军路冯慧慧李迪锋徐楠王燕宁波市中心血站业务发展科浙江宁波315010 宁波市中心血站献血服务二科浙江宁波315010

近年来,为了保障血液质量安全,提高了检测试剂的灵敏度,但此举措也增加了检测结果假阳性的发生,导致部分献血者被永久性屏蔽,无法继续献血[1,2]。宁波市中心血站自2017年始根据相关规定开展血液筛查反应性献血者的归队工作,使部分献血... 详细信息

近年来,为了保障血液质量安全,提高了检测试剂的灵敏度,但此举措也增加了检测结果假阳性的发生,导致部分献血者被永久性屏蔽,无法继续献血[1,2]。宁波市中心血站自2017年始根据相关规定开展血液筛查反应性献血者的归队工作,使部分献血者成功归队。现收集2017~2023年在我站进入归队程序的献血者的相关资料进行分析。现报道如下。

关键词：血液筛查献血假阳性反应性献血者血液质量安全相关因素研究检测试剂归队

Using video imagery to reconstruct the 3D intertidal terrain along a beach with multiple cusps

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Acta Oceanologica Sinica 2023年第7期42卷 1-9页

作者： feng Cai Hang Yin Hongshuai Qi Jixiang zheng Yuwu Jiang Zhubin Cao Yanyu He Laboratory of Ocean and Coast Geology Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China College of Ocean and Earth Sciences Xiamen UniversityXiamen 361104China College of Harbour Coastal and Offshore EngineeringHohai UniversityNanjing 210098China

A high-frequency,high-resolution shore-based video monitoring system(VMS)was installed on a macrotidal(tidal amplitude>4 m)beach with multiple cusps along the Quanzhou coast,***,we propose a video imagery-based method that is coupled with waterline and water level observations to reconstruct the terrain of the intertidal zone over one tidal ***,the beach cusp system(BCS)was precisely processed and embedded into the digital elevation model(DEM)to more effectively express the microrelief and detailed characteristics of the intertidal *** a field experiment conducted in January 2022,the reconstructed DEM was deemed *** DEM was verified by RTK-GPS and had an average vertical root mean square error along corresponding RTK-GPS-derived intertidal profiles and corresponding BCS points of 0.134 m and 0.065 m,*** results suggest that VMSs are an effective tool for investigating coastal geomorphic processes.

关键词： intertidal terrain beach cusp video monitoring system waterline method feature embedment

钙离子转运ATP酶B2杂合突变导致小鼠渐进性前庭功能障碍

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上海交通大学学报（医学版） 2024年第6期44卷 723-732页

作者：刘祎晴金晨曦冯宝怡成桢哲孙怡琳郑晓飞董庭婷吴皓陶永上海交通大学医学院附属第九人民医院耳鼻咽喉头颈外科上海200011 上海交通大学医学院耳科学研究所上海200125 上海市耳鼻疾病转化医学重点实验室上海200125 上海交通大学医学院附属第九人民医院样本库上海200125

目的·研究不同月龄钙离子转运ATP酶B2(ATPase plasma membrane Ca^(2+)transporting 2,ATP2B2)Oblivion杂合突变小鼠前庭毛细胞结构和前庭功能的变化。方法·选取2月龄及8月龄Atp2b2 Oblivion杂合突变雄性小鼠各10只,以同龄C57BL/6J野生型雄性小鼠作为对照。通过免疫荧光实验观察不同月龄2组小鼠前庭毛细胞ATP2B2表达情况,并对微纹区及纹外区毛细胞数量进行统计;通过扫描电子显微镜(电镜)观察小鼠前庭毛细胞纤毛形态;通过透射电镜观察小鼠前庭毛细胞带状突触和线粒体;采用前庭诱发电位(vestibular evoked potential,VsEP)、前庭肌源性诱发电位(vestibular evoked myogenic potential,VEMP),及转棒、平衡木实验检测小鼠的前庭功能。结果·2组小鼠ATP2B2均主要表达于前庭毛细胞纤毛,2月龄及8月龄Atp2b2 Oblivion杂合突变小鼠微纹区及纹外区毛细胞数量与野生型小鼠均无明显差异。扫描电镜下,2月龄及8月龄杂合突变小鼠椭圆囊毛细胞纤毛无明显结构异常。透射电镜下,2月龄杂合突变小鼠前庭毛细胞表皮板与神经连接部位附近的线粒体结构无异常,突触结构无异常;8月龄杂合突变小鼠前庭毛细胞表皮板附近线粒体出现空泡样变性,神经连接部位附近的线粒体及突触结构无异常。2月龄及8月龄杂合突变小鼠VsEP及VEMP阈值均较野生型小鼠显著上升,VsEP波形分析显示杂合突变小鼠P1潜伏期延长,P1N1波幅降低(均P<0.05)。2月龄杂合突变小鼠转棒、平衡木实验结果未见明显改变,但8月龄杂合突变小鼠完成转棒、平衡木能力较野生型小鼠显著下降(均P<0.05)。结论·Atp2b2 Oblivion杂合突变小鼠2月龄时前庭电生理功能下降,8月龄时出现前庭相关行为学异常,Atp2b2 Oblivion杂合突变小鼠呈渐进性前庭功能障碍。

关键词：钙离子转运ATP酶B2 前庭功能障碍前庭毛细胞纤毛