检索结果-南通市图书馆

Yb-and er concentration dependence of the upconversion luminescence of highly doped NaYF_(4):Yb,er/NaYF_(4):Lu core/shell nanocrystals prepared by a water-free synthesis

引用

Nano research 2022年第10期15卷 9639-9646页

作者： Christian Würth Bettina Grauel Monika Pons Florian Frenzel philipp rissiek Kerstin rücker Markus Haase Ute resch-Genger Federal Institute for Materials research and Testing(BAM) Division BiophotonicsRichard-Willstaetter-Str.1112489 BerlinGermany Institut für Chemie Neuer Materialien Fachbereich Biologie/ChemieUniversität OsnabrückBarbarastraße 749076 OsnabrückGermany

High sensitizer and activator concentrations have been increasingly examined to improve the performance of multi-color emissive upconversion(UC)nanocrystals(UCNC)like NaYF_(4):Yb,er and first strategies were reported to reduce concentration quenching in highly doped *** luminescence(UCL)is,however,controlled not only by dopant concentration,yet by an interplay of different parameters including size,crystal and shell quality,and excitation power density(P).Thus,identifying optimum dopant concentrations requires systematic studies of UCNC designed to minimize additional quenching pathways and quantitative ***,we quantify the dopant concentration dependence of the UCL quantum yield(ΦUC)of solid NaYF_(4):Yb,er/NaYF_(4):Lu upconversion core/shell nanocrystals of varying Yb3+and er3+concentrations(Yb3+series:20%‒98%Yb3+;2%er3+;er3+series:60%Yb3+;2%‒40%er3+).To circumvent other luminescence quenching processes,an elaborate synthesis yielding OH-free UCNC with recordΦUC of~9%and~25 nm core particles with a thick surface shell were *** Yb3+concentrations barely reduceΦUC from~9%(20%Yb3+)to~7%(98%Yb3+)for an er3+concentration of 2%,thereby allowing to strongly increase the particle absorption cross section and UCNC *** an increased er3+concentration reducesΦUC from~7%(2%er3+)to 1%(40%)for 60%Yb3+.Nevertheless,at very high P(>1 MW/cm^(2))used for microscopic studies,highly er3+-doped UCNC display a high brightness because of reduced *** findings underline the importance of synthesis control and will pave the road to many fundamental studies of UC materials.

关键词： highly doped upconversion nanocrystals core/shell nanoparticles upconversion luminescence efficiency NaYF_(4):Yb er concentration quenching

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

合作翻译的挑战及其对策研究——以《生育制度》第十三章和第十五章的翻译为例

合作翻译的挑战及其对策研究——以《生育制度》第十三章和第十五...

引用

作者： jan philipp Klein 北京外国语大学

学位级别：硕士

合作翻译是翻译领域一种非常中常见的现象,然而翻译界对此领域的关注较少。本论文以费孝通《生育制度》一书译成德文的翻译项目为例对于合作翻译进行研究。费孝通是中外著名的人类学家、社会学家,首次出版于1947年的《生育制度》一本书... 详细信息

合作翻译是翻译领域一种非常中常见的现象,然而翻译界对此领域的关注较少。本论文以费孝通《生育制度》一书译成德文的翻译项目为例对于合作翻译进行研究。费孝通是中外著名的人类学家、社会学家,首次出版于1947年的《生育制度》一本书属于社会学类的,这本书主要论述了当时中国各种与配偶选择、婚姻、育子女、亲戚等方面相关的问题。本论文主要针对合作翻译所带来的特殊挑战与问题进行研究,由于合作翻译中如何能做到统一是非常关键的问题,因此本篇论文以此为论述重点进行研究。对此进行研究时也会关注到笔者参与翻译项目的背景、翻译项目本身的结构与协调员对于笔者翻译质量的具体要求。另外,论文还会提到笔者与翻译项目协调员之间的沟通和翻译项目审校员工作这两方面以便分析出本次合作翻译的特殊条件。论文会先从笔者在翻译过程中所遇到的一般性的问题开始论述合作翻译统一的问题。然后会以具体的例子对于统一的问题进行分析,例子出于翻译初稿与审校完之后版本之间的比较,主要研究被更改的地方,笔者按例子更改的具体原因进行分类,然后按例子所属类型进行具体例子的分析,例子类型按照以下标准进行划分:属于该类型例子的数量、该类型例子对于译文质量的影响、该类型例子的研究意义。两种类型选最有代表性的进行分析。在结语部分笔者将总结此前分析的主要结果,阐明其意义,另外,还就如何更好地做到统一做出建议,最后笔者思考接下来还需要再研究的相关内容和本次论文对于自己作为译者的意义。通过以上分析研究,笔者认为:前后统一这个问题对于合作翻译至关重要,译者之间,译者与协调员之间的沟通合作对合作翻译有重要意义。统一在合作翻译领域中是一种较为复杂的概念,它包含多种意义上的统一,譬如遣字用词、语言风格、对原作和作者的解读、翻译策略等方面,另外还要注意到原文和译文的统一和译文里的统一这两个层次。本论文注重在遣字用词、语言风格与处理文化因素的方式上。分析具体例子时笔者发现了不少审校员没有做到完全统一的地方,这一结果就表明了真正做到统一难度极高,论文中所分析的具体例子表明了原文出现同一词意义上可能包含的多样而复杂给统一译文所带来的挑战。另外,论文也涉及到原文出现为同一词、在原文里意思也统一的词在译文中出现不同译法的现象,对其不同的理由和对统一译文的负面影响进行研究。此外,还以原文中经常使用的第一人称和这一现象在译文中的统一翻译方法为例对语言风格统一进行研究。随后还对于文化因素的处理方式进行研究,这一方面注重在正文上写出相关解释还是使用脚注的方式和这方面的不统一对译文结构影响这一方面上。最后还涉及到外文中使不使用汉字对统一译文的影响。本论文的结果作为对合作翻译进行进一步研究的基础。

关键词：合作翻译统一费孝通生育制度

来源：

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

CuSbS_(2)薄膜光阴极的电子结构及其在光电催化分解水制氢的应用

引用

中国科学:材料科学(英文版) 2023年第9期66卷 3530-3538页

作者：钱静雯赵宇赵鹏举程浩然 jan philipp Hofmann 张洪良 State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsHubei Key Laboratory of Polymer Materials(Hubei University)School of Materials Science and EngineeringHubei UniversityWuhan 430062China Surface Science Laboratory Department of Materials and Earth SciencesTechnical University of DarmstadtOtto-Berndt-Strasse 3Darmstadt 64287Germany

硫化锑铜(CuSbS_(2))是一种p型半导体,带隙为1.5 eV,同时拥有较大的光吸收系数(>105cm-1),因此在光电催化领域拥有广阔的应用前景.但是目前国内外的研究还缺乏对CuSbS_(2)电子结构以及其如何影响PEC性能的深入理解.为了进一步改善CuSbS_... 详细信息

硫化锑铜(CuSbS_(2))是一种p型半导体,带隙为1.5 eV,同时拥有较大的光吸收系数(>105cm-1),因此在光电催化领域拥有广阔的应用前景.但是目前国内外的研究还缺乏对CuSbS_(2)电子结构以及其如何影响PEC性能的深入理解.为了进一步改善CuSbS_(2)的PEC性能,对其电子结构进行一系列表征分析是非常重要的.本文中,我们利用同步辐射技术揭示了CuSbS_(2)的电子结构.结果表明,CuSbS_(2)的价带(VB)由S 3p和Cu 3d的强杂交态组成,同时Sb 5p/5s也有部分影响.基于以上理论指导,我们设计了一种高质量Cu Sb S_(2)薄膜的制备技术,并使用FTO/CuSbS_(2)/CdS/Pt光电阴极在0.0 V下实现了CuSbS_(2)基材料的高光电流密度(6.3 mA cm^(-2)).

关键词：光吸收系数光电阴极同步辐射技术光电催化光阴极硫化锑光电流密度

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

reciprocal effects of alpha-synuclein aggregation and lysosomal homeostasis in synucleinopathy models

引用

Translational Neurodegeneration 2023年第1期12卷 479-499页

作者： Alice Drobny Fanni Annamária Boros Denise Balta Susy Prieto Huarcaya Deniz Caylioglu Niyeti Qazi Julia Vandrey Yanni Schneider jan philipp Dobert Caleb Pitcairn Joseph robert Mazzulli Friederike Zunke Department of Molecular Neurology University Hospital ErlangenFriedrich-Alexander University Erlangen-Nürnberg91054 ErlangenGermany Institute of Biochemistry Christian-Albrechts-University KielKielGermany The Ken and ruth Davee Department of Neurology Northwestern University Feinberg School of MedicineChicagoIL 60611USA.

Background Lysosomal dysfunction has been implicated in a number of neurodegenerative diseases such as Parkinson’s disease(PD).Various molecular,clinical and genetic studies have highlighted a central role of lysosomal pathways and proteins in the pathogenesis of *** PD pathology the synaptic protein alpha-synuclein(αSyn)converts from a soluble monomer to oligomeric structures and insoluble amyloid *** aim of this study was to unravel the effect ofαSyn aggregates on lysosomal turnover,particularly focusing on lysosomal homeostasis and *** these enzymes have been shown to be directly involved in the lysosomal degradation ofαSyn,impairment of their enzymatic capacity has extensive *** We used patient-derived induced pluripotent stem cells and a transgenic mouse model of PD to examine the effect of intracellularαSyn conformers on cell homeostasis and lysosomal function in dopaminergic(DA)neurons by biochemical *** We found impaired lysosomal trafficking of cathepsins in patient-derived DA neurons and mouse models withαSyn aggregation,resulting in reduced proteolytic activity of cathepsins in the *** a farnesyltransferase inhibitor,which boosts hydrolase transport via activation of the SNArE protein ykt6,we enhanced the maturation and proteolytic activity of cathepsins and thereby decreasedαSyn protein *** Our findings demonstrate a strong interplay betweenαSyn aggregation pathways and function of lysosomal *** appears thatαSyn directly interferes with the enzymatic function of cathepsins,which might lead to a vicious cycle of impairedαSyn degradation.

关键词： Dopaminergic neurons iPSC-derived models Lysosome Parkinson’s disease Protein trafficking Synucleinopathy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pancreatic panniculitis and elevated serum lipase in metastasized acinar cell carcinoma of the pancreas: A case report and review of literature

引用

World Journal of Clinical Cases 2020年第21期8卷 5304-5312页

作者： rainer Christoph Miksch Tobias S Schiergens Maximilian Weniger Matthias Ilmer philipp M Kazmierczak Markus O Guba Martin K Angele Jens Werner jan G D'Haese Department of General Visceraland Transplantation SurgeryLudwig-Maximilians-University MunichMunich 81377BavariaGermany Department of General Visceral Transplantat Vasc&Thorac Surg Campus GrosshadernUniversity of MunichMunich 81377Germany Department of General Ludwig Maximilians-University(LMU)Munich 81377Germany Department of radiology Ludwig-Maximilians-University MunichMunich 81377Germany Department of Surgery University of MunichKlinikum GrosshadernMunich University HospitalMunich 81377Germany Department of General University of MunichKlinikum GrosshadernHospital of the University of MunichMunich 81377Germany Department of General Klinikum Univ MunchenKlin Allgemeine Viszeral Transplantat Gefass&ThStandort GrosshadernLudwig-Maximilians-University(LMU)Munich 81377Germany

BACKGrOUND Pancreatic panniculitis is an extremely rare condition associated with different underlying pancreatic disorders and characterized by subcutaneous fat necrosis induced by elevated serum lipase *** lesions usually affect the lower extremities and may precede abdominal symptoms of pancreatic *** cell carcinoma(ACC)of the pancreas is a rare pancreatic neoplasm,accounting for only 1%-2%of pancreatic tumors in *** present the case of a 72-year-old man with ACC of the pancreatic head and synchronous liver *** the primary tumor and liver metastases were *** lipase was elevated before surgery and decreased to normal *** serum lipase levels at follow-up led to the diagnosis of hepatic *** disease progression was then accompanied by pancreatic panniculitis,with subcutaneous fat necrosis and acute *** the best of our knowledge,only 4 cases have been reported in the literature and each showed a similar association of serum lipase levels with pancreatic panniculitis and progression of *** Clinical symptoms and progression of ACC may correlate with serum lipase levels,suggesting potential usefulness as a follow-up biomarker.

关键词： Pancreatic panniculitis Lipase Acinar cell carcinoma Pancreatic cancer Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Partial external biliary diversion in bile salt export pump deficiency: Association between outcome and mutation

引用

World Journal of Gastroenterology 2017年第29期23卷 5295-5303页

作者： philipp Ellinger jan Stindt Carola Droge Katharina Sattler Claudia Stross Stefanie Kluge Diran Herebian Sander HJ Smits Martin Burdelski Sebastian Schulz-Jürgensen Antje Ballauff jan Schulte am Esch ertan Mayatepek Dieter Haussinger ralf Kubitz Lutz Schmitt In-stitute of Biochemistry Hein-rich-Hein-e-Un-iversity Düsseldorf Medical Faculty Departmen-t of Gastroen-terology Hepatology an-d In-fectious Diseases Hein-rich-Hein-e-Un-iversity Düsseldorf Departmen-t of Gen-eral Pediatrics Neon-atology an-d Pediatric Cardiology Medical Faculty Hein-rich-Hein-e-Un-iversity Düsseldorf Departmen-t of Paediatrics Un-iversity Hospital Schleswig Holstein- Departmen-t of Paediatrics Helios Clin-ic Departmen-t of Gen-eral Surgery Hein-rich-Hein-e-Un-iversity

To investigate the relation of two different mutations to the outcome of partial external biliary diversion (PEBD) in severe bile salt export pump (BSEP) deficiency. METHODSMutations in the gene encoding BSEP leading to severe BSEP deficiency in two unrelated patients were identified by genomic sequencing. Native liver biopsies and transiently transfected human embryonic kidney (HEK) 293 cells expressing either wild-type or mutated BSEP were subjected to immunofluorescence analysis to assess BSEP transporter localization. Bile acid profiles of patient and control bile samples were generated by ultra-performance liquid chromatography-tandem mass spectrometry. Wild-type and mutant BSEP transport of [3H]-labeled taurocholate (TC) and taurochenodeoxycholate (TCDC) was assessed by vesicular transport assays. rESULTSA girl (at 2 mo) presented with pruritus, jaundice and elevated serum bile salts (BS). PEBD stabilized liver function and prevented liver transplantation. She was heterozygous for the BSEP deletion p.T919del and the nonsense mutation p.r1235X. At the age of 17 years relative amounts of conjugated BS in her bile were normal, while total BS were less than 3% as compared to controls. An unrelated boy (age 1.5 years) presenting with severe pruritus and elevated serum BS was heterozygous for the same nonsense and another missense mutation, p.G1032r. PEBD failed to alleviate pruritus, eventually necessitating liver transplantation. BS concentration in bile was about 5% of controls. BS were mainly unconjugated with an unusual low amount of chenodeoxycholate derivatives (er biopsies showed canalicular BSEP expression. Both BSEP p.T919del and p.G1032r were localized in the plasma membrane in HEK293 cells. In vitro transport assays showed drastic reduction of transport by both mutations. Using purified recombinant BSEP as quantifiable reference, per-molecule transport rates for TC and TCDC were determined to be 3 and 2 BS molecu

关键词： Familial intrahepatic cholestasis type 2 Partial external biliary diversion Bile salt export pump ATP binding cassette transporter Intrahepatic cholestasis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Direct writing of anodic oxides for plastic electronics

引用

npj Flexible Electronics 2018年第1期2卷 189-198页

作者： Christian Michael Siket Nadine Tillner Andrei Ionut Mardare Amir reuveny Carina Daniela Grill Florian Hartmann Gerald Kettlgruber richard Moser jan philipp Kollender Takao Someya Achim Walter Hassel Martin Kaltenbrunner Siegfried Bauer Soft Matter Physics Johannes Kepler University LinzAltenberger Str.694040 LinzAustria Department of Electrical Engineering University of TokyoTokyo 113-8656Japan Institute for Technology of Inorganic Materials Johannes Kepler University LinzAltenberger Str.694040 LinzAustria Christian Doppler Laboratory for Combinatorial Oxide Chemistry(COMBOX) Johannes Kepler University LinzAltenberger Str.694040 LinzAustria Linz Institute of Technology LIT Johannes Kepler University LinzAltenberger Str.694040 LinzAustria

Metal oxide thin films for soft and flexible electronics require low cost,room temperature fabrication,and structuring *** here introduce an anodic printing process to realize the essential building blocks of electronic circuitry,including resistors,capacitors,field-effect transistors,diodes,rectifiers,and memristors directly on imperceptible plastic *** independent on surface properties,we achieve high-quality,few nanometer thin dielectric and semiconducting films even on rough substrates via localized anodisation of valve metals using a scanning droplet cell *** demonstrate printing-like fabrication of 3D multilayer solid-state capacitors with a record-high areal capacity of 4μF cm−*** to the whole class of valve metals and their alloys,our method provides a versatile fabrication technique for the circuits that empower the flexible and stretchable electronics of tomorrow.

关键词： anodic printing metals

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

EQUILIBrIUM SAMPLING THrOUGH MEMBrANES(ESTM) FOr DETerMINATION OF FrEELY DISSOLVED FrACTIONS OF OrGANIC AND INOrGANIC POLLUTANTS

EQUILIBRIUM SAMPLING THROUGH MEMBRANES(ESTM) FOR DETERMINATI...

引用

第十一届北京分析测试学术报告会暨展览会(BCEIA 2005)

作者： jan Ake Jnsson Jingfu Liu philipp Mayer Analytical Chemistry Lund University State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for EcoEnvironmental SciencesChinese Academy of Sciences

Membrane assisted extraction facilitates the integration of classical liquid-liquid extraction(LLE)chemistry to automated instrumental *** shortcomings of classical LLE are overcome by the membrane separation of sampl...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

基于机器学习的人工关节置换术后医院感染预测模型的构建与评价

引用

中华医院感染学杂志 2024年第12期34卷 1826-1830页

作者：甘文思干铁儿杨西帆余旭霞杨璐李文渊浙江大学公共卫生学院大数据健康科学系(浙江大学医学院附属第二医院临床大数据与统计中心) 浙江杭州310058 温州市中西医结合医院感染管理科浙江温州325000 浙江中医药大学附属第一医院(浙江省中医院)感染管理科浙江杭州310000

目的构建一种基于机器学习的预测模型,用于人工关节置换术后医院感染的预测.方法选择浙江省杭州市某三甲医院2017年1月-2022年11月进行人工关节置换手术的1800例住院患者作为研究对象,将数据集以3:1的比例随机分成训练集(1350例)和测试... 详细信息

目的构建一种基于机器学习的预测模型,用于人工关节置换术后医院感染的预测.方法选择浙江省杭州市某三甲医院2017年1月-2022年11月进行人工关节置换手术的1800例住院患者作为研究对象,将数据集以3:1的比例随机分成训练集(1350例)和测试集(450例).在训练集中应用递归特征消除方法进行自变量筛选,通过网格搜索方法确定逻辑回归、支持向量机(SVM)、决策树(DT)、极端梯度提升(XGBoost)和随机森林(rF)等五类模型的最佳参数.使用敏感度(TPr)、阳性预测值(PPV)、特异度(TNr)、阴性预测值(NPV)、F1分数、准确度和曲线下面积(AUC)等指标来评估模型性能,确定较优机器学习模型,并采用沙普利加性解释(SHAP)方法对较优模型中的变量重要性进行解释.结果1800例参与者中102例发生感染,发生率为5.67%;逻辑回归、DT、rF、SVM和XGBoost等五个模型在训练集中的AUC值达0.92、0.89、0.98、0.70、0.98;测试集中AUC值则分别为0.85、0.78、0.86、0.63、0.88;XGBoost、rF模型为较优的机器学习模型.SHAP结果显示围手术期抗菌药物使用天数、手术时间、年龄、国家医院感染监控系统(NNIS)评分、失血量是较为重要的预测因子.结论本研究建立了基于机器学习算法的人工关节置换术后医院感染风险预测模型,并比较了多种预测模型的效能,其中XGBoost、rF模型的总体性能较优,有利于及时准确地识别人工关节置换术后医院感染高危患者并实施有效的干预措施.

关键词：人工关节置换机器学习预测模型术后医院感染

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于H_∞滤波器的红外小目标运动预测和跟踪方法

引用

红外与毫米波学报 2005年第5期24卷 366-369页

作者：凌建国刘尔琦杨杰杨磊上海交通大学图像处理与模式识别研究所上海200030 中国航天科工集团公司二院北京100854

根据H∞滤波理论,提出了基于H∞滤波预测技术的红外图像小目标运动预测和跟踪方法,为了降低模型阶数以加快图像处理速度,滤波过程被分解在水平和垂直两个方向上分别进行,即将滤波器分解为x、y方向上两个子滤波器.H∞滤波器是一种基于最... 详细信息

根据H∞滤波理论,提出了基于H∞滤波预测技术的红外图像小目标运动预测和跟踪方法,为了降低模型阶数以加快图像处理速度,滤波过程被分解在水平和垂直两个方向上分别进行,即将滤波器分解为x、y方向上两个子滤波器.H∞滤波器是一种基于最优化最坏情况下的滤波技术,它对噪声源的要求不高,能较好地应用在复杂场景下的目标运动预测与跟踪.实验证实了在噪声源不能确定或是未知的情况下,它比Kalm an滤波器对红外小目标的运动预测更加准确并具有更好抗扰动性.

关键词：红外图像目标预测 H∞滤波 Kalman滤波

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：