检索结果-南通市图书馆

Density of states characterization of Tio_(2) films deposited by pulsed laser deposition for heterojunction solar cells

引用

nano Research 2022年第5期15卷 4048-4057页

作者： Daniele Scire Roberto Macaluso Mauro Mosca Maria Pia Casaletto Olindo Isabella Miro Zeman Isodiana crupi Department of Engineering University of PalermoViale delle ScienzeEd.9Palermo 90128Italy Institute of nanostructured Materials(ISMN) National Research Council(CNR)Via Ugo La Malfa 153Palermo 90146Italy Photovoltaic Materials and Devices Group Delft University of TechnologyMekelweg 4Delft 2628CDthe Netherlands

The application of titanium dioxide(Tio_(2))in the photovoltaic(PV)field is gaining traction as this material can be deployed in doping-free heterojunction solar cells with the role of electron selective *** modeling-based optimization of such contact,knowledge of the titanium oxide defect density of states(DOS)is *** this paper,we report a method to extract the defect density through nondestructive optical measures,including the contribution given by small polaron optical *** presence of both related to oxygen-vacancy defects and polarons is supported by the results of optical characterizations and the evaluation of previous observations resulting in a defect band fixed at 1 eV below the conduction band edge of the *** cells employing pulsed laser deposited-Tio_(2)electron selective contacts were fabricated and *** J-V curve of these cells showed,however,an S-shape,then a detailed analysis of the reasons for such behavior was carried *** use a model involving the series of a standard cell equivalent circuit with a Schottky junction in order to explain these atypical performances.A good matching between the experimental measurements and the adopted theoretical model was *** extracted parameters are listed and analyzed to shed light on the reasons behind the low-performance cells.

关键词： solar cell heterojunction photovoltaic(PV) defect density small polaron pulsed laser deposition(PLD) titanium dioxide(Tio_(2)) defects

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

肾外夹角对外生型肾乏脂肪血管平滑肌脂肪瘤与肾透明细胞癌的鉴别诊断价值

引用

临床放射学杂志 2025年第1期44卷 133-137页

作者：张小梅李娜赵艳王滔乐山市人民医院放射医学科 614000

目的探讨肾外夹角对外生型肾乏脂肪血管平滑肌脂肪瘤(AMLmf)与肾透明细胞癌(ccRCC)的鉴别诊断价值。方法回顾性分析经手术和病理证实的ccRCC患者55例共56个病灶,AMLmf患者20例共22个病灶,通过形态学分析两组肿瘤差异,测量肿瘤的肾外夹... 详细信息

目的探讨肾外夹角对外生型肾乏脂肪血管平滑肌脂肪瘤(AMLmf)与肾透明细胞癌(ccRCC)的鉴别诊断价值。方法回顾性分析经手术和病理证实的ccRCC患者55例共56个病灶,AMLmf患者20例共22个病灶,通过形态学分析两组肿瘤差异,测量肿瘤的肾外夹角并定量分析两组间的差异。结果假包膜、劈裂征及“冰激凌蛋筒征”对AMLmf与ccRCC的鉴别有统计学差异(P<0.05);两组肿瘤的肾外较大夹角及较小夹角值间差异有统计学意义。受试者工作特征(ROC)曲线分析显示肾外较大夹角、肾外较小夹角、劈裂征、“冰激凌蛋筒征”及假包膜鉴别AMLmf与ccRCC的曲线下面积(AUC)值分别为0.925、0.983、0.638、0.727、0.731,五种指标联合的AUC值为0.996,明显高于单一指标。结论肾外夹角、假包膜、劈裂征及“冰激凌蛋筒征”有助于AMLmf与ccRCC的鉴别诊断,联合五种影像学特征的诊断效能更高。

关键词：体层摄影术 X线计算机肾外夹角肾乏脂肪血管平滑肌脂肪瘤肾透明细胞癌

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

基于共享度的上海郊区社区居民活动空间隔离及其影响因素

引用

地理学报 2020年第4期75卷 849-859页

作者：塔娜申悦华东师范大学地理信息科学教育部重点实验室上海200241 华东师范大学地理科学学院上海200241 华东师范大学中国行政区划研究中心上海200062 华东师范大学中国现代城市研究中心上海200062

在流动性不断增强与居民活动模式日益多样化的背景下,城市社会空间分异与隔离的内涵不断扩展,居民在日常生活中面临的空间隔离受到关注。以活动空间为基础的社会空间分异研究快速兴起,以期从更加动态的视角理解城市社会空间。基于上海... 详细信息

在流动性不断增强与居民活动模式日益多样化的背景下,城市社会空间分异与隔离的内涵不断扩展,居民在日常生活中面临的空间隔离受到关注。以活动空间为基础的社会空间分异研究快速兴起,以期从更加动态的视角理解城市社会空间。基于上海市郊区问卷调查数据,构建活动空间共享度指标,建立个体尺度的活动空间分异指数和孤立指数,刻画社区内不同收入群体的活动空间隔离状况,并建立活动空间共享度的多层模型分析活动空间隔离的影响因素。研究发现居住在同一社区的不同收入居民之间存在活动空间隔离,居民更愿意与其社会经济属性相似的人共享活动空间。活动空间隔离程度受到个体社会经济属性、社区设施状况、社区周边环境、社区人口密度和社会混合程度等因素的影响,居住在人口密度高、社会混合度高、社区商业配置良好、公共空间充足的开放社区能提高居民的活动空间共享度,增加不同群体社会接触的可能性。

关键词：行为地理学社会空间活动空间隔离上海

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

Trace elements in tree rings and their environmental effects: A case study in Xi’an City

引用

Science China Earth Sciences 2009年第4期52卷 504-510页

作者： LIU Yu ta WeiYuan BAO TingYi YANG ZengYue SONG HuiMing LIU na WANG WeiPing ZHANG HongYi ZHANG Wei AN ZhiSheng School of Human Settlement and Civil Engineering Xi’an JiaoTong UniversityXi’an 710049China The Institute of Environment and Reproduction Department of UrologyThe Fourth Military Medical UniversityXi’an 710038China Institute of Earth Environment Chinese Academy of SciencesXi’an 710075China

Using wet digested method and ICP mass spectrometer, we analyzed the concentration of five trace elements (Cd, Mn, P, Zn and Pb) for the tree rings from both urban and suburbs of Xi'an. At the urban sampling site, one Chinese mahogany (Toona sinensis) disc and one phoenix tree (Firmiana simplex) disc were sampled from a steelworks in Xi'an City. At the suburb site, a Chinese mahogany disc was collected from a village in the south of the City. In addition, some soils near the roots of the sampled trees were collected. The analysis results indicate that the concentration of each of the five elements in annual rings has a positive correlation with the production of the steelworks. Statistical calculations show that Pb and Mn elements were stable without lag effects. That means these two elements do not move between rings. Cd displayed one year moving, P two years and Zn three years. These results are quite similar to those found by other methods.

关键词： Xi’an tree rings element concentration environmental contaminants

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

脂肪间充质干细胞治疗急性肝损伤的分子机制

引用

中国组织工程研究 2025年第23期29卷 5041-5050页

作者：杨娜刘杨郝慧琴山西中医药大学中西医结合基础实验室山西省晋中市030619

背景:急性肝损伤是由多种病因诱发的肝脏损害,如未及时治疗则会发展成急性肝衰竭,严重影响患者的生命安全。由于肝脏是人体最大的免疫器官和代谢器官,目前治疗急性肝损伤尚无最优方案。脂肪间充质干细胞因具有多向分化潜能和免疫调节活... 详细信息

背景:急性肝损伤是由多种病因诱发的肝脏损害,如未及时治疗则会发展成急性肝衰竭,严重影响患者的生命安全。由于肝脏是人体最大的免疫器官和代谢器官,目前治疗急性肝损伤尚无最优方案。脂肪间充质干细胞因具有多向分化潜能和免疫调节活性已逐渐成为治疗急性肝损伤的有效工具。目的:综述目前脂肪间充质干细胞及其经不同方式修饰后治疗急性肝损伤的进展和分子机制。方法:从PubMed、Web of Science与中国知网数据库中检索2000-2023年发表的相关文献,以“Acute liver injury,liver injury,Adipose tissue-derived mesenchymal stem cell,liver Injury Repair,stem cell transplantation,stem cell repair,Cell surface engineering,stem cell modification”为英文检索词,以“急性肝损伤,肝损伤,脂肪间充质干细胞,肝损伤修复,干细胞移植,干细胞修复,干细胞修饰”为中文检索词,最终检索筛选出该领域最新研究进展的62篇文献进行归纳分析。结果与结论:(1)脂肪间充质干细胞作为一种具有多向分化潜能的干细胞治疗急性肝损伤具有生物学优势,较其他两种主要间充质干细胞类型——骨髓间充质干细胞和脐带间充质干细胞具有来源丰富、获取便捷、医学伦理问题少的特点,且较骨髓间充质干细胞的自我更新能力强。(2)脂肪间充质干细胞可以通过降低免疫反应、分化为肝细胞、分泌生长因子和外泌体等多种途径,降低血清炎症因子表达,减少肝脏组织炎性细胞浸润,抑制细胞焦亡和自噬,发挥抗凋亡作用,促进肝窦内皮细胞和肝细胞再生等分子机制改善肝损伤;目前尚无研究表明何种机制为脂肪间充质干细胞治疗急性肝损伤的最佳机制,多数观点认为这些分子机制之间相互影响相互作用协同发挥治疗作用。(3)生物材料修饰和药物预处理等方式可以提升脂肪间充质干细胞治疗急性肝损伤的疗效:一方面,生物材料和药物修饰可以提升脂肪间充质干细胞自身的功能,如提高增殖迁移能力,上调其分泌的生长因子水平,增强抗炎能力等,从而促进脂肪间充质干细胞在损伤部位存活;另一方面,生物材料和药物修饰可以抑制损伤部位炎性细胞活化,促进血管生长,改善损伤部位环境从而提高移植成功率。(4)总之,脂肪间充质干细胞可以通过分泌生长因子和外泌体、发挥免疫调节作用及促进肝脏再生等途径在治疗急性肝损伤中发挥重要作用。随着科学技术的发展,生物材料与药物修饰可以提升脂肪间充质干细胞的自我更新能力,改善急性肝损伤的局部微环境,为进一步促进脂肪间充质干细胞治疗急性肝损伤的临床应用提供新的思路。

关键词：急性肝损伤脂肪间充质干细胞肝脏脂肪组织细胞移植细胞修饰细胞工程损伤修复

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

The lubrication performance of water lubricated bearing with consideration of wall slip and inertial force

引用

Journal of Hydrodynamics 2017年第1期29卷 52-60页

作者：解忠良塔娜饶柱石 Laboratory of Vibration Shock and NoiseShanghai Jiao Tong UniversityShanghai 200240China

The lubrication mechanism and the performance parameters with consideration of wall slip and inertial force are studied in this paper. Based on the modified Reynolds equation, the finite difference method is used to study the lubrication mechanism and the performance. Effects of the wall slip and the inertial force on the performance parameters are obtained, and found in good agreement with the results of FLUENT. It is shown that the wall slip and the inertial force do not significantly change the distribution of the pressure, the load capacity and the friction force. The inertial force slightly increases the pressure and the load capacity by 1.2% and 4.8%, while the wall slip reduces them by 8.0% and 17.85%. The wall slip and the inertial force increase the friction by about 15.98%, 2.33%, respectively. Compared with the wall slip, the inertial force is smaller, but cannot be neglected.

关键词： Water lubricated bearing wall slip inertial force effect lubrication performance

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

Chung＇s Law of the Iterated Logarithm for Subfractional Brownian Motion

引用

Acta Mathematica Sinica,English Series 2017年第6期33卷 839-850页

作者： na na LUAN School of Insurance and Economics University of International Business and Economics Beijing 100029 P. R. China

Let XH = {xH（t）,t ∈ R＋} be a subfractional Brownian motion in Rd. We provide asufficient condition for a self-similar Gaussian process to be strongly locally nondeterministic and show that XH has the property of strong local nondeterminism. Applying this property and a stochastic integral representation of XH, we establish Chung＇s law of the iterated logarithm for XH.

关键词： Subfractional Brownian motion self-similar Gaussian processes small ball probability,Chung's law of the iterated logarithm

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

Prevalence and clinical application of TMPRSS2-ERG fusion in Asian prostate cancer patients: a large-sample study in Chinese people and a systematic review

引用

Asian Journal of Andrology 2020年第2期22卷 200-207页

作者： De-Pei Kong Rui Chen Chun-Lei Zhang Wei Zhang Guang-An Xiao Fu-Bo Wang na ta Xu Gao Ying-Hao Sun Department of Urology Shanghai Changhai HospitalSecond Military Medical UniversityShanghai 200433China Department of Pathology Shanghai Changhai HospitalSecond Military Medical UniversityShanghai 200433China

Fusion between the transmembrane protease serine 2 and v-ets erythroblastosis virus E26 oncogene homolog(TMPRSS2-ERG fusion)is a common genetic alteration in prostate cancer among Western populations and has been suggested as playing a role in tumorigenesis and progression of prostate ***,the prevalence of TMPRSS2-ERG fusion differs among different ethnic groups,and contradictory results have been reported in Asian *** aim to evaluate the prevalence and significance of TMPRSS2-ERG fusion as a molecular subtyping and prognosis indicator of prostate cancer in *** identified the fusion status in 669 samples from prostate biopsy and radical prostatectomy by fluorescence in situ hybridization and/or immunohistochemistry in *** examined the association of TMPRSS2-ERG fusion with clinicopathological characteristics and biochemical recurrence by Chi-square test and Kaplan–Meier ***,a systematic review was performed to investigate the positive rate of the fusion in Asian prostate cancer ***’s test was employed to compare the positive rates of TMPRSS2-ERG fusion detected using different *** positive rates of TMPRSS2-ERG fusion were 16%in our samples and 27%in Asian *** our samples,9.4%and 19.3%of cases were recognized as fusion positive by fluorescence in situ hybridization and immunohistochemistry,*** significant association between the fusion and clinical parameters was ***2-ERG fusion is not a frequent genomic alteration among Asian prostate cancer patients and has limited significance in clinical practices in *** ethnic difference,detection methods potentially influence the results showing a positive rate of TMPRSS2-ERG fusion.

关键词： Asian Chinese prostate cancer systematic review TMPRSS2-ERG

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

circT P63-N suppresses the proliferation and metastasis of nasopharyngeal carcinoma via engaging with HSP90AB1 to modulate the YAP1/Hippo signaling pathway

引用

Science China Life Sciences 2025年

作者： Dan Wang Sicheng Zuo Junshang Ge Hongke Qu Jie Wu na Yi Lei Shi Yumin Wang Yongzhen Mo Chunmei Fan Yi He Pan Chen Ming Zhou Bo Xiang Wei Xiong Wenjia Guo Zhaoyang Zeng Can Guo NHC Key Laboratory of Carcinogenesis and Hunan Key Laboratory of Cancer Metabolism Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine Central South University Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education Cancer Research Institute and School of Basic Medicine Sciences Central South University Furong Laboratory Cancer Research Institute Affiliated Cancer Hospital of Xinjiang Medical University Xinjiang Key Laboratory of Translational Biomedical Engineering

Circular Rnas(circRnas) play pivotal roles in the development and progression of various diseases, including malignant tumors. However,the biological functions and the underlying mechanisms of many circRnas remain elusive. In this study, we identified a novel circRna,circTP63-N, generated through the splicing of exons 2–4 of the TP63 gene in nasopharyngeal carcinoma(NPC). circTP63-N was found to be downregulated in clinical samples of NPC. Both in vitro and in vivo experiments unequivocally demonstrated that circTP63-N inhibits the proliferation and metastasis of NPC cells. Further investigations revealed that circTP63-N interacted with the HSP90AB1 protein, leading to the recruitment of LATS/YAP1 proteins. This, in turn, induced phosphorylation and ubiquitination-dependent degradation of YAP1, resulting in reduced nuclear translocation of YAP1 and inhibition of the transcriptional activation of downstream oncogenic genes, including INHBA, MMP3, and CCNE2. Our findings highlight the identification of circTP63-N, a novel circRna encoded by an important tumor-relevant gene TP63 and elucidate its molecular mechanism as a tumor suppressor in NPC. These insights offer novel potential molecular markers and therapeutic targets for the clinical diagnosis and treatment of NPC.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

基于岭估计方法的多谐波源责任划分

引用

电力系统自动化 2015年第21期39卷 87-92页

作者：贾秀芳岳娜新能源电力系统国家重点实验室华北电力大学河北省保定市071003

电网中受关注母线处的谐波电压是系统中所有谐波源共同作用的结果。在主要谐波源已知的情况下,量化这些谐波源在受关注母线处产生的谐波影响是划分谐波污染责任的前提。首先建立了多谐波源谐波责任划分的多元线性回归模型,考虑到系数矩... 详细信息

电网中受关注母线处的谐波电压是系统中所有谐波源共同作用的结果。在主要谐波源已知的情况下,量化这些谐波源在受关注母线处产生的谐波影响是划分谐波污染责任的前提。首先建立了多谐波源谐波责任划分的多元线性回归模型,考虑到系数矩阵病态情况下传统最小二乘估计无法得出正确结果,因此研究应用了岭估计方法。当谐波电流数据异常或者存在一定相关性时,岭估计方法避免了模型病态导致的错误结果。仿真算例验证了所述方法的有效性以及在系数矩阵病态时相对于传统最小二乘估计的优越性。

关键词：电能质量多谐波源谐波责任最小二乘估计岭估计

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：