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{1012}twin–twin intersection-induced lattice rotation and dynamic recrystallization in Mg–6Al–3Sn–2Zn alloy

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Journal of Magnesium and Alloys 2024年第4期12卷 1529-1539页

作者： Bin-Jiang Lv Sen Wang Fu-Hao Gao ning cui Yi-Nan Li Tie-Wei Xu Feng Guo School of Mechanical and Automotive Engineering Qingdao University of Technology266520China Key Lab of industrial Fluid Energy Conservation and Pollution Control Qingdao University of Technology266520China

This study investigated the formation mechanism of new grains due to twin–twin intersections in a coarse-grained Mg–6Al–3Sn–2Zn alloy during different strain rates of an isothermal *** results of electron backscattered diffraction investigations showed that the activated twins were primarily{1012}tension twins,and 60°boundaries formed due to twin–twin intersections under different strain *** twin variants with 60°boundaries transformed into new grains through lattice rotations at a low strain rate(0.01 s^(−1)).At a high strain rate(10 s^(−1)),the regions surrounded by subgrain boundaries through high-density dislocation arrangement and the 60°boundaries transformed into new grains via dynamic recrystallization.

关键词： Mg alloy Twin-twin intersection Lattice rotation Dynamic recrystallization

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Alpha-gal syndrome

Chinese Medical Journal 2024年第10期137卷 1234-1236页

作者： Mengyuan Zhan Shaohui Chen Tengda Xu Jia Yin Hao Li Zhouxian Pan ning cui Liping Wen Department of Allergy Peking Union Medical College HospitalPeking Union Medical CollegeChinese Academy of Medical SciencesBeijing 100730China State Key Laboratory of Complex Severe and Rare Diseases Beijing 100730China National Clinical Research Center for Dermatologic and Immunologic Diseases(NCRC-DID) Beijing 100730China Department of Health Care Peking Union Medical College HospitalChinese Academy of Medical SciencesBeijing 100730China Department of Anesthesiology Chinese Academy of Medical College and Peking Union Medical College HospitalBeijing 100730China State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and EpidemiologyBeijing Key Laboratory of Vector Borne and Natural Focus Infectious DiseasesBeijing 100071China The No.154 Hospital XinyangHenan 464000China

To the Editor:Meat is an important source of protein and could be roughly classied into red and white *** meat,which encompasses poultry,seafood such assh and shrimp,and reptiles,etc.,is characterized by its pale color when *** meat is basically mammalian meat,including domestic animal meats,such as pork,beef,lamb,and wild animal meat in certain regions,such as kangaroos,seals,and *** mammalian meat appears red due to the presence of myoglobin in skeletal *** clinical presentations of mammalian meat allergy comprise two types of allergic reactions,immediatetype and delayed-type,although both are mediated by immunoglobulin E(IgE).The immediate-type hypersensitivity manifests as allergic symptoms occurring shortly after ingestion of red meat and is primarily triggered by serum albumin and immunoglobulin which are the major allergenic *** is the classic pattern of food *** delayed-type hypersensitivity is characterized by delayed onset of allergic symptoms 2-6 h after red meat ingestion and is mediated by oligosaccharideα-gal-specic IgE which is a recently discoveried pattern of food allergy.

关键词： allergic Alpha pattern

Unconventional photon blockade in the two-photon Jaynes–Cummings model with two-frequency cavity drivings and atom driving

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Chinese Physics B 2024年第2期33卷 164-168页

作者：刘欣田梦雨崔晓宁张馨鹤 School of Physics and Technology University of JinanJinan 250022China Marketing Service Center(Center of Metrology) State Grid ShanDong Electric Power CompanyJinan 250001China

In a two-frequency cavity driving and atom driving atom-cavity system,we find the photon blockade *** a truncated eigenstates space,we calculate the zero-delay second-order correlation function of the cavity mode analytically and obtain an optimal condition for the photon *** including three transition pathways,we find that higher excitations of the cavity mode can be further suppressed and the zero-delay second-order correlation function can be reduced *** on the master equation,we simulate the system evolution and find that the analytical solutions match well with the numerical *** scheme is robust with small fluctuations of parameters and may be used as a new type of single photon source.

关键词： photon blockade single photon source quantum interference

基于NSGA-Ⅲ的机载雷达空空射频隐身探测参数设计

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系统工程与电子技术 2024年第1期46卷 97-104页

作者：刘俊崔宁谢佳昕行坤中国科学院空天信息创新研究院北京100094 中国科学院大学电子电气与通信工程学院北京100049

目标探测任务要求雷达具备较大的发射功率,但这又会增大其辐射特征,从而降低射频(radio frequency,RF)隐身性能,因此如何权衡RF隐身与探测性能成为机载雷达RF隐身探测的难点问题。为此,本文提出一种用于机载雷达空中运动目标RF隐身探测... 详细信息

目标探测任务要求雷达具备较大的发射功率,但这又会增大其辐射特征,从而降低射频(radio frequency,RF)隐身性能,因此如何权衡RF隐身与探测性能成为机载雷达RF隐身探测的难点问题。为此,本文提出一种用于机载雷达空中运动目标RF隐身探测的多目标优化参数设计方法。所提方法首先建立空中运动目标射频隐身探测多目标优化模型;然后利用非支配排序遗传算法Ⅲ(non-dominated sorting genetic algorithmⅢ,NSGA-Ⅲ)对该模型求解,获得帕累托最优解集;最后采用层次分析逼近理想解排序法对候选解集进行多属性决策获得最终方案。数值实验结果表明所提方法可有效应用于空中运动目标射频隐身探测参数设计。

关键词：机载雷达空中运动目标探测射频隐身多目标优化

Photoinduced palladium-catalyzed 1,3-diene-selective fluoroalkylamination compounds as potential bactericidal agent against Xanthomonas oryzae ***

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Chinese Chemical Letters 2024年第1期35卷 401-405页

作者： Yu Shi Zhao-Sheng Zhang Jiang Shao Chen Fu Lan-Tu Xiong Zhao-Dong Li Zi-ning cui National Key Laboratory of Green Pesticide Integrative Microbiology Research CentreGuangdong Province Key Laboratory of Microbial Signals and Disease ControlCollege of Plant ProtectionSouth China Agricultural UniversityGuangzhou 510642China Henry Fok School of Biology and Agriculture Shaoguan UniversityShaoguan 512005China College of Materials and Energy South China Agricultural UniversityGuangzhou 510642China

A series of photoinduced palladium-catalyzed 1,3-diene-selective fluoroalkylamination derivatives was rationally synthesized based on diversity-oriented synthesis via cross coupling of 1,3-dienes,amines and fluoroalkyl *** reaction featured good function group tolerance and a broad substrate scope,which could be extended to the late-stage modification of bioactive *** activity of all the compounds against Xanthomonas oryzae ***(Xoo)was *** them,compound E14 showed significant activity against Xanthomonas oryzae ***(Xoo)with half maximal effective concentration(EC50)value of 6.61μmol/*** pot experiments,the results showed that E14 could control rice bacterial blight with protective and curative efficiencies of 37.5%and 63.2%at 200μg/mL,***,a plausible mechanism for antibacterial behavior of E14 was proposed by electron microscopy,flow cytometry,reactive oxygen species detection,and biofilm *** current work,it can promote the development of photoinduced palladium-catalyzed 1,3-diene-selective fluoroalkyl amination compounds as prospective antibacterial agent bearing an intriguing mode of action.

关键词： 1,3-Diene-selective fluoroalkylamination derivatives Xanthomonas oryzae pv.oryzae Antibacterial activity Electron microscopy Reactive oxygen Flow cytometry

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煤矿带式输送机运输系统智能化监控分析

能源与节能 2024年第9期 95-97,101页

作者：崔宁山西汾西矿业(集团)有限责任公司灵北煤矿山西晋中031302

对山西汾西A矿3308综采工作面带式输送机监控系统布置情况、存在问题进行分析,发现带式输送机监控系统主要存在转载点堵塞无法及时检测、输送带撕裂故障检测效率低、运行感知不完善等问题。在现有的监控系统基础上,提出通过引进先进的A... 详细信息

对山西汾西A矿3308综采工作面带式输送机监控系统布置情况、存在问题进行分析,发现带式输送机监控系统主要存在转载点堵塞无法及时检测、输送带撕裂故障检测效率低、运行感知不完善等问题。在现有的监控系统基础上,提出通过引进先进的AI技术、巡检机器人、感温光纤及运行控制技术等用于监控系统感知增强、故障诊断及智能巡检、环境参数监测及运行控制。工程应用后,构建的智能化监控系统可实现对带式输送机运行的实时监测、故障及时预警及沿线环境监控,在提高带式输送机运行可靠性及运行感知能力等方面效果显著,为后续矿井构建智能化运输系统创造了良好条件。

关键词：带式输送机智能监控智能巡检增强感知载荷检测故障诊断

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积灰性质对光伏组件输出性能影响研究

太阳能学报 2024年第1期45卷 11-19页

作者：陈宇翔崔凝李斌李庆哲马凯华北电力大学能源动力与机械工程学院保定071003

该文针对光伏电站现场的灰成分,进行不同粒径和不同成分积灰对光伏组件输出性能影响实验,基于实验数据建立积灰密度、太阳辐照度与光伏组件输出功率以及工作电流的拟合模型。实验结果表明,光伏组件开路电压和最佳工作电压受积灰性质波... 详细信息

该文针对光伏电站现场的灰成分,进行不同粒径和不同成分积灰对光伏组件输出性能影响实验,基于实验数据建立积灰密度、太阳辐照度与光伏组件输出功率以及工作电流的拟合模型。实验结果表明,光伏组件开路电压和最佳工作电压受积灰性质波动较小,光伏组件最佳工作电流受积灰性质影响较大,光伏组件最大输出功率衰减主要是受到光伏组件最佳工作电流降低的影响,积灰粒径分布对光伏组件最大输出功率和最佳工作电流的影响远大于积灰成分的影响。

关键词：光伏组件输出功率积灰性质工作电流

副结核分枝杆菌免疫原蛋白的筛选及免疫保护效果评价

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中国农业科学 2024年第6期57卷 1204-1214页

作者：陈凡若张嘉俊鹿萍崔宁崔莹莹崔子寅党光辉刘思国中国农业科学院哈尔滨兽医研究所/动物疫病防控全国重点实验室

【背景】副结核病(paratuberculosis,PTB)是由副结核分枝杆菌(Mycobacterium avium subsp. paratuberculosis,MAP)主要引起反刍动物的一种慢性消耗性传染病。患病动物表现为肉芽肿性肠炎和肠道的功能失调、顽固性腹泻、渐进性消瘦、营... 详细信息

【背景】副结核病(paratuberculosis,PTB)是由副结核分枝杆菌(Mycobacterium avium subsp. paratuberculosis,MAP)主要引起反刍动物的一种慢性消耗性传染病。患病动物表现为肉芽肿性肠炎和肠道的功能失调、顽固性腹泻、渐进性消瘦、营养不良、贫血、嗜睡甚至死亡。PTB给畜牧业造成巨大的经济损失，并且严重威胁公共卫生安全。由于目前临床上对于PTB的检测和控制手段不够完善，现有的PTB疫苗保护效果不佳，并且干扰牛结核病的诊断，因此亟需研发免疫原性强、保护效果佳的疫苗以用于PTB的防控。【目的】通过筛选MAP免疫原蛋白，并对其免疫保护效果进行评价，为PTB的防控提供数据支持。【方法】根据MAP的p22、map1272c、map3531c、map3783、map3701c以及map3527这6个基因，分别构建5种重组质粒，在获得5种重组蛋白基础上，联合MONTANIDE ISA 61 VG佐剂皮下多点注射免疫小鼠，通过IFN-γ ELISPOT试验筛选出最佳免疫原；随后将最佳免疫原和已报道的66NC融合蛋白混合，经皮下多点注射免疫小鼠，在二免3周后用1×108CFU的MAP K-10菌株腹腔感染小鼠。通过IFN-γ ELISPOT试验，抗体监测和细胞因子检测，分析感染后小鼠的体重、肝脏病理学和组织病理学变化及其荷菌数差异，综合评价候选亚单位疫苗的免疫原性和免疫保护效果。【结果】以MAP p22、map1272c、map3531c、map3783以及map3701c为基础成功构建和表达了5种融合蛋白58F、62F、69F、46F和52F，其中免疫58F后产生的IFN-γ水平最高，是更具潜力的候选免疫原，且以融合蛋白组合66NC+58F诱导持久高滴度的IgG、IgM、IgG1和IgG2a水平，诱导特异性的IFN-γ、TNF-α和IL-17A的释放；在保护效果评价中，融合蛋白组合66NC+58F抵抗MAP感染造成的体重下降，显著减轻肝脏的病理损伤，降低MAP在肝脏中的定植。【结论】融合蛋白组合66NC+58F诱导小鼠产生Th1和Th17型免疫反应，对MAP感染有着一定免疫保护作用，是PTB重要的候选亚单位疫苗。

关键词：副结核分枝杆菌亚单位疫苗 58F蛋白免疫评价

暂堵剂用聚乳酸/聚乙醇酸复合纤维的制备及降解性能研究

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材料导报 2024年第13期38卷 266-271页

作者：吴鹏飞崔华帅朱金唐史贤宁崔宁李杰黄庆中国纺织科学研究院有限公司生物源纤维制造技术国家重点实验室北京100025

暂堵剂是石油气开采中增产的重要材料,随着环保要求的提高,可降解暂堵剂材料已成为当前石油气开采中的首选材料。聚乙醇酸作为降解速率最快且最简单的线性脂肪族聚酯,由其制成的可降解暂堵绳结已在石油气开采中得到应用。但聚乙醇酸存... 详细信息

暂堵剂是石油气开采中增产的重要材料,随着环保要求的提高,可降解暂堵剂材料已成为当前石油气开采中的首选材料。聚乙醇酸作为降解速率最快且最简单的线性脂肪族聚酯,由其制成的可降解暂堵绳结已在石油气开采中得到应用。但聚乙醇酸存在降解速率快、货架期短等问题,大大限制了其产品的推广使用。本工作采用复合熔融纺丝法制备了以聚乳酸为皮层、聚乙醇酸为芯层的圆形截面皮芯复合纤维,研究了不同皮芯比例聚乳酸/聚乙醇酸复合纤维的形貌、降解性能、热性能和结晶性。结果表明:复合纤维在70℃下的溶解率“转折点”出现在降解6 h时,降解前6 h内,复合纤维的溶解率都在3%(质量分数)以内;降解6 h后,复合纤维的溶解率几乎呈线性升高,皮芯比例为20/80的复合纤维降解24 h后,溶解率可以达到23.2%。扫描电镜照片显示,复合纤维降解24 h后,聚乳酸层厚度越小,纤维降解程度越高,在皮芯比例为20/80的复合纤维中,聚乳酸层大量开裂,造成芯层的聚乙醇酸沿纤维轴向降解断裂成小段。热性能结果显示,聚乳酸结晶度随降解时间延长而增大,而聚乙醇酸结晶度随降解时间延长先增大后减小。广角X射线衍射结果显示,复合纤维中聚乙醇酸晶粒尺寸较小,尤其是c轴长度仅为约34 nm。纤维强度保持率和降解液的pH值都与皮层厚度成正比。本工作为暂堵剂制备提供了新途径。

关键词：聚乳酸聚乙醇酸(PGA) 皮芯复合纤维暂堵剂降解性能