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Air stable Fe nanostructures with high magnetization prepared by reductive annealing

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Journal of Materials Science & Technology 2017年第11期33卷 1334-1338页

作者： Yanhua Liu Baoru Bian Chunfeng Hu pengpeng yi Juan Du Weixing Xia Jian Zhang Aru Yan ying Li J.Ping Liu Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology & Engineering Chinese Academy of Sciences Key Laboratory of Advanced Technologies of Materials Ministry of Education School of Materials Science and Engineering Southwest Jiaotong University School of Materials Science and Engineering Shanghai University Department of Physics University of Texas at Arlington

Monodispersed Fe nanospindles and nanoparticles were successfully synthesized through environmentfriendly reductive annealing ？-Fe OOH nanorods. Effects of annealing temperature and reaction atmosphere on microstructure, phase, and magnetic property of Fe nanostructures were *** as-obtained pure Fe nanoparticles with mean size of 45 nm had a high saturation magnetization up to 207 emu/g, close to that of bulk material（218 emu/g）, which exhibited high air stability. After exposing in air for 2 and 7 days, the as synthesized Fe nanoparticles still showed high magnetization of 182 and141 emu/g, respectively.

关键词： Fe nanostructures Microstructure High saturation magnetization High air stability

热压过程对热变形钕铁硼磁体磁性能影响的研究

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稀有金属材料与工程 2009年第A1期38卷 576-578页

作者：易鹏鹏林旻王会杰闫阿儒李东中国科学院宁波材料技术与工程研究所浙江宁波315201 钢铁研究总院北京100081

介绍了利用快淬粉制备全密度、高性能、各项异性钕铁硼稀土永磁体的有效方法—热压、热变形方法。成功制备出了磁能积BHm约3.44×105T·(A/m),剩磁Br约1.352T,矫顽力Hcj约1×106A/m的热变形钕铁硼磁体。利用XRD、VSM、PPMS、SEM等材料... 详细信息

介绍了利用快淬粉制备全密度、高性能、各项异性钕铁硼稀土永磁体的有效方法—热压、热变形方法。成功制备出了磁能积BHm约3.44×105T·(A/m),剩磁Br约1.352T,矫顽力Hcj约1×106A/m的热变形钕铁硼磁体。利用XRD、VSM、PPMS、SEM等材料表征手段对样品磁性能的各项异性以及取向度进行了分析,并讨论了工艺参数对样品磁性能的影响。

关键词：热压热变形钕铁硼各项异性取向度

甲状腺弥漫性大B细胞淋巴瘤临床病理特征、基因突变谱及预后分析

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上海交通大学学报（医学版） 2024年第1期44卷 64-71页

作者：杜沚珊王玥石子旸施晴易红梅董磊王黎程澍许彭鹏赵维莅上海交通大学医学院附属瑞金医院血液科医学基因组学国家重点实验室上海血液学研究所上海200025

目的·探究甲状腺弥漫性大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)临床病理特征、基因突变谱及预后相关因素。方法·回顾性分析2003年11月—2021年12月上海交通大学医学院附属瑞金医院收治的66例初次诊断为甲状腺DLBCL患者[... 详细信息

目的·探究甲状腺弥漫性大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)临床病理特征、基因突变谱及预后相关因素。方法·回顾性分析2003年11月—2021年12月上海交通大学医学院附属瑞金医院收治的66例初次诊断为甲状腺DLBCL患者[原发甲状腺DLBCL 23例(34.8%),继发甲状腺DLBCL 43例(65.2%)]的临床病理资料,并进行生存和预后因素分析。其中40例甲状腺DLBCL患者进行了靶向测序(55个淋巴瘤相关基因)以评估基因突变情况。结果·继发甲状腺DLBCL患者Ann Arbor分期Ⅲ~Ⅳ期(P=0.000)、乳酸脱氢酶(lactate dehydrogenase,LDH)升高(P=0.043)、结外器官受累数目≥2个(P=0.000)、非生发中心来源(non-GCB)(P=0.030)、MYC和BCL2蛋白双表达(double expression,DE)(P=0.026)、国际预后指数3~5分(P=0.000)的比例高于原发甲状腺DLBCL患者,其接受甲状腺手术切除的比例(P=0.012)低于原发甲状腺DLBCL患者。原发甲状腺DLBCL患者完全缓解(complete response,CR)率高于继发患者(P=0.039)。55例患者(83%)接受以利妥昔单克隆抗体联合环磷酰胺、阿霉素、长春新碱及泼尼松(R-CHOP)为基础的一线治疗方案,其中原发甲状腺DLBCL患者预期5年无进展生存(progress free survive,PFS)率95.0%,高于继发患者的49.7%(P=0.010)。单因素分析显示:Ann ArborⅢ~Ⅳ期(HR=4.411,95%CI 1.373~14.170)、LDH升高(HR=5.500,95%CI 1.519~19.911)、non-GCB(HR=5.291,95%CI 1.667~16.788)、DE(HR=6.178,95%CI 1.813~21.058)是甲状腺DLBCL患者PFS的不良预后因素;Ann ArborⅢ~Ⅳ期(HR=7.088,95%CI 0.827~60.717)、LDH升高(HR=6.982,95%CI 0.809~60.266)、DE(HR=18.079,95%CI 1.837~177.923)是总生存(overall survival,OS)时间的不良预后因素。多因素分析显示:Ann ArborⅢ~Ⅳ期(HR=4.693,95%CI 1.218~18.081)和LDH升高(HR=5.058,95%CI 1.166~21.941)是甲状腺DLBCL患者PFS的独立不良预后因素。靶向测序结果显示,TET2(n=14,35%)、KMT2D(n=13,32%)、TP53(n=11,28%)、GNA13(n=10,25%)、KMT2C(n=9,22%)突变频率>20%,且TP53突变是甲状腺DLBCL患者PFS的不良预后因素(P=0.000)。结论·原发甲状腺DLBCL生存情况优于继发甲状腺DLBCL。Ann ArborⅢ~Ⅳ期、LDH升高、non-GCB、DE(MYC和BCL2)是影响甲状腺DLBCL患者的不良预后因素。TET2、KMT2D、TP53、GNA13、KMT2C是甲状腺DLBCL中常见的高突变基因,TP53突变的患者预后不佳。

关键词：甲状腺弥漫性大B细胞淋巴瘤临床病理特征基因突变谱预后分析

山东省长山列岛北部海域浅表层海洋灾害地质特征及成因机制分析

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山东国土资源 2024年第4期40卷 25-32页

作者：张燕挥张一勇晓宇雷雁翔张朋朋孟屹明山东省物化探勘查院山东济南250013 山东省地质勘查工程技术研究中心山东济南250013

海洋灾害地质作为影响海洋资源开发、海洋工程建设活动的重要因素,越来越受到人们的重视。通过对长山列岛北部海域多波束测量、浅地层剖面测量工作成果资料的解译研究,分析了影响海底浅表层潜在海洋灾害地质的因素,查明了主要灾害类型... 详细信息

海洋灾害地质作为影响海洋资源开发、海洋工程建设活动的重要因素,越来越受到人们的重视。通过对长山列岛北部海域多波束测量、浅地层剖面测量工作成果资料的解译研究,分析了影响海底浅表层潜在海洋灾害地质的因素,查明了主要灾害类型、埋藏特征和分布范围,编制了灾害地质分布图,分析了灾害地质的形成机制及危害性,研究区灾害类型主要有海底冲刷槽、浅层气、埋藏古河道、断层等。为研究区海洋资源的开发利用,尤其海洋牧场建设等工作提供科学依据。

关键词：灾害地质浅表层特征分析长山列岛山东省

Experimental and Modeling Study of the Regular Polygon Angle-spiral Liner in Ball Mills

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Chinese Journal of Mechanical Engineering 2017年第2期30卷 363-372页

作者： yi SUN Man LIANG Xiaohang JIN pengpeng JI Jihong SHAN College of Mechanical Engineering Zhejiang University of TechnologyHangzhou 310014China

Load behavior is one of the most critical factors affecting mills＇ energy consumption and grinding efficiency, and is greatly affected by the liner profiles. Generally, as liner profiles vary, the ball mill performances are extremely different. In order to study the performance of the ball mill with regular polygon angle-spiral liners（RPASLs）, experimental and numerical studies on three types of RPASLs, including regular quadrilateral, pentagonal and hexagonal, are carried out. For the fine product of desired size, two critical parameters are analyzed： the energy input to the mill per unit mass of the fine product, E＊, and the rate of production of the fine product, F＊. Results show that the optimal structure of RPASLs is Quadrilateral ASL with an assembled angle of 50°. Under this condition, the specific energy consumption E＊ has the minimum value of 303 J per fine product and the production rate F＊ has the maximum value of 0.323. The production rate F＊ in the experimental result is consistent with the specific collision energy intensity to total collision energy intensity ratio Es/Et in the simulation. The relations between the production rate F＊ and the specific energy consumption E＊ with collision energy intensity Es and Et are obtained. The simulation result reveals the essential reason for the experimental phenomenon and correlates the mill performance parameter to the collision energy between balls, which could guide the practical application for Quadrilateral ASL.

关键词： Load behavior Regular polygon angle-spiral liner (RPASL) Particle size distribution. Rate of production of fine product Energy consumption. Collision energy intensity

基于无人机高光谱影像数据降维的红树林种间分类

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北京测绘 2024年第5期38卷 721-726页

作者：吴献文史合印易俐娜龙光辉王芃芃王玉赵星涛广东工贸职业学院测绘遥感信息学院广东广州510510 中国矿业大学(北京)地球科学与测绘工程学院北京100083 广州南方测绘科技股份有限公司广东广州510510 北京帝信科技有限公司北京100071

选取深圳市福田自然保护区为研究区域,将无人机高光谱遥感系统应用于红树林资源遥感调查,建立红树林遥感信息提取和种间精细分类模式。首先采用基于专家知识的决策树分类方法,利用归一化植被指数(NDVI)区分出红树林与其他地物;然后对红... 详细信息

选取深圳市福田自然保护区为研究区域,将无人机高光谱遥感系统应用于红树林资源遥感调查,建立红树林遥感信息提取和种间精细分类模式。首先采用基于专家知识的决策树分类方法,利用归一化植被指数(NDVI)区分出红树林与其他地物;然后对红树林数据进行最小噪声分离(MNF)变换;再利用最佳指数因子公式(OIF)对MNF变换后的前11个波段进行分析,得到最佳组合波段;最后对最佳组合波段采用基于像元的最小距离方法和支持向量机方法进行红树林种间分类。结果表明:采用基于专家知识的决策树分类方法能够有效提取红树林分布区,采用基于像元的支持向量机方法进行种间分类效果较好,总体分类精度在99%以上。基于专家知识的红树林提取与树种分类模式适用于红树林种间分类与制图。

关键词：红树林高光谱信息提取福田自然保护区

Analysis of Clinical Characteristics and Risk Factors of Pseudomonas aeruginosa Bloodstream Infection in 55 Cases

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Yangtze Medicine 2023年第3期7卷 162-170页

作者： pengpeng Tian Shanshan Su Tian Wang Lisa Zhu Wen Fan Huawei yi Department of Laboratory Medicine of the First Affiliated Hospital of Yangtze University Jingzhou China

Objective: Pseudomonas aeruginosa bloodstream infection presents a severe challenge to hospitalized patients. To investigate the clinical characteristics, risk factors and drug resistance of Pseudomonas aeruginosa bloodstream infection. Methods: Clinical data and laboratory results of patients with Pseudomonas aeruginosa bloodstream infection in the First Affiliated Hospital of Yangtze University from January 2019 to December 2022 were retrospectively analyzed. The factors associated with infection and death were analyzed by univariate analysis. Results: A total of 55 patients were enrolled in this study, The 28-day mortality rate was 14.5%. Univariate analysis showed that high procalcitonin, low albumin, ICU admission, central venous catheterization, indwelling catheter, and mechanical ventilation were associated with death. Multivariate Logistic regression analysis showed that hypoproteinemia and central venous catheters were independent risk factors for death in patients with Pseudomonas aeruginosa bloodstream infection. Conclusions: The drug resistance of P. aeruginosa bloodstream infection is not high, but the fatality rate is high. The combination of hypoalbuminemia after the onset of the disease and the use of central vein catheters can lead to increased mortality, suggesting that clinical identification of high-risk patients as early as possible, reducing the use of catheters, preventing the occurrence of P. aeruginosa bloodstream infection and improving the prognosis.

关键词： Pseudomonas aeruginosa Bloodstream Infections Resistance Risk Factors

基于人工智能的全自动化一站式CT血流储备分数在冠心病患者中的诊断与预后价值

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Science Bulletin 2024年第10期69卷 1472-1485页

作者：郭邦俊姜孟春郭翔唐春香钟健陆梦洁刘春雨张晓蕾乔红艳周帆许棚棚薛艺郑敏文侯阳王怡宁张佳胤张波张代民徐磊胡秀华周长圣李建华杨志文毛新生卢光明张龙江 Department of Radiology Jinling HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjing 210002China Department of Radiology Affiliated Hospital of Jining Medical UniversityJining 272007China Department of Radiology Xijing HospitalFourth Military Medical UniversityXi’an 733399China Department of Radiology Shengjing Hospital of China Medical UniversityShenyang 110022China Department of Radiology Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100005China Institute of Diagnostic and Interventional Radiology and Department of CardiologyShanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200235China Department of Radiology Jiangsu Taizhou People’s HospitalTaizhou 225399China Department of Cardiology Nanjing First HospitalNanjing Medical UniversityNanjing 210012China Department of Radiology Beijing Anzhen HospitalCapital Medical UniversityBeijing 100029China Department of Radiology Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhou 310020China Department of Cardiology Jinling HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjing 210002China Shukun(Beijing)Network Technology Co. Ltd.Beijing 102200China

Currently,clinically available coronary CT angiography(CCTA)derived fractional flow reserve(CT-FFR)is time-consuming and *** propose a novel artificial intelligence-based fully-automated,on-site CT-FFR technology,which combines the automated coronary plaque segmentation and luminal extraction model with reduced order 3 dimentional(3D)computational fluid dynamics.A total of 463 consecutive patients with 600 vessels from the updated China CT-FFR study in Cohort 1 undergoing both CCTA and invasive fractional flow reserve(FFR)within 90 d were collected for diagnostic performance *** Cohort 2,a total of 901 chronic coronary syndromes patients with index CT-FFR and clinical outcomes at 3-year follow-up were retrospectively *** Cohort 3,the association between index CT-FFR from triple-rule-out CTA and major adverse cardiac events in patients with acute chest pain from the emergency department was further *** diagnostic accuracy of this CT-FFR in Cohort 1 was 0.82 with an area under the curve of 0.82 on a per-patient *** with the manually dependent CT-FFR techniques,the operation time of this technique was substantially shortened by 3 times and the number of clicks from about 60 to *** CT-FFR technique has a highly successful(>99%)calculation rate and also provides superior prediction value for major adverse cardiac events than CCTA alone both in patients with chronic coronary syndromes and acute chest ***,the novel artificial intelligencebased fully automated,on-site CT-FFR technique can function as an objective and convenient tool for coronary stenosis functional evaluation in the real-world clinical setting.

关键词： Artificial intelligence Coronary CTA CT-derived fractional flow reserve Fully-automated Outcomes

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华南云开地区幕式岩浆作用与大陆再造

地球科学 2023年第9期48卷 3205-3220页

作者：虞鹏鹏丁望曾长育柳渊周永章郑义中山大学地球科学与工程学院广东省地质过程与矿产资源探查重点实验室广东珠海519082 南宁师范大学地理科学与规划学院广西南宁530001

云开地区是华南古老基底出露的关键地带,记录了华南多期次复杂的地壳再造过程.庞西垌地区位于云开地块的南西缘,区内出露古老基底残片的云开群石英云母片岩.本研究通过详细的野外地质、岩石学和年代学分析,获得该地区花岗片麻岩、片麻... 详细信息

云开地区是华南古老基底出露的关键地带,记录了华南多期次复杂的地壳再造过程.庞西垌地区位于云开地块的南西缘,区内出露古老基底残片的云开群石英云母片岩.本研究通过详细的野外地质、岩石学和年代学分析,获得该地区花岗片麻岩、片麻状花岗岩和块状黑云母花岗岩高精度锆石U-Pb年龄分别为~450 Ma、~440 Ma和~105 Ma,指示该区经历了加里东期和燕山期幕式岩浆作用.其中,早古生代花岗质岩石中存在多组锆石年龄(~470 Ma、~450~430 Ma和~390 Ma),暗示其经历了长期、多幕次的岩浆过程.此外,在锆石边部还获得了228~219 Ma(低Th/U=0.01~0.03)和101~99 Ma(高Th/U=0.30~0.78)的年龄组,是成岩后印支期变质流体和燕山期岩浆流体的改造印迹.研究区燕山期花岗岩(~770℃)较加里东期(~740~720℃)具有更高的锆石饱和温度,可能是由于地壳经过多次熔融后易熔组分消耗、成熟度较高,发生部分熔融所需的温度更高.它们的年龄谱图与华南古老基底一致,且具有S型花岗岩特征,是缺乏幔源物质加入的古老地壳重熔改造的产物.结合区域地质、年代学和地球化学资料,华南显生宙以来至少经历了加里东期(470~390 Ma)、印支期(~248~200 Ma)和燕山期(~180~90 Ma)的大陆地壳再造/变质‒岩浆流体改造过程.加里东期和印支期主要发生古老地壳物质的部分熔融,极少幔源岩浆参与;燕山期改造过程则主要是地幔热源和物质主导的地壳重熔和壳‒幔混合的结果.

关键词：大陆再造花岗岩锆石U⁃Pb年代学加里东期云开地块岩石学地球化学