检索结果-南通市图书馆

Manipulating Nanowires in Interconnecting Layer for Efficient Tandem Organic Photovoltaics

Chinese Journal of Chemistry 2024年第4期42卷 377-383页

作者： Yanjie Tang Jiaming Fu Hao li Du Hyeon Ryu Won Suk Shin Jianqi Zhang Yi Yang Yiming Yang deyuan li Zhong Zheng Shaoqing Zhang Jianhui Hou School of Chemistry and Biology Engineering University of Science and Technology Beijing(USTB)Beijing100083 China State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of Sciences(ICCAS)Beijing100190 China Energy Materials Research Center Korea Research Institute of Chemical Technology(KRICT)Advanced Materials&Chemical EngineeringUniversity of Science&Technology(UST)Korea The National Center for Nanoscience and Technology(NCNST) Beijing100190 China University of Chinese Academy of Sciences Beijing(UCAS) Beijing100049 China China Railway Resources Group Survey and Design Co.Ltd. LangfangHebei065000 China

Owing to the function of manipulating light absorption distribution,tandem organic solar cells containing multiple sub-cells exhibit high power conversion efficiencies.However,there is a substantial challenge in precisely controlling the inter-subcells carrier migration which determines the balance of charge transport across the entire device.The conductivity of"nanowires"-like conducting channel in interconnecting layer between sub-cells should be improved which calls for fine engineering on the morphology of polyelectrolyte in interconnecting layer.Here,we develop a simple method to effectively manipulating the domains of conductive components in commercially available polyelectrolyte PEDOT:PSs.The use of poor solvent could effectively modify the configuration of polystyrene sulfonic acid and thus the space for conductive components.Based on our strategy,the insulated shells wrapping conductive domains are thinned and the efficiencies of tandem organic solar cells are improved.We believe our method might provide guidance for the manufacture of tandem organic solar cells.

关键词： Tandem organic solar cells Power conversion efficiency interconnecting layer Tunneling junction Interfacial layers Conformationanalysis π-πstacking Donor-acceptorsystems

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

Energy mechanism of bolt supporting effect to fissured rock under static and dynamic loads in deep coal mines

引用

International Journal of Mining Science and Technology 2024年第3期34卷 371-384页

作者： deyuan Fan Xuesheng liu Yunliang Tan Xuebin li Shenglong Yang College of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Mining Disaster Prevention and Control Shandong University of Science and TechnologyQingdao 266590China National Energy Group Ningxia Coal Industry Co. Ltd.Yinchuan 753001China

The stability control of fissured rock is difficult,especially under static and dynamic loads in deep coal mines.In this paper,the dynamic mechanical properties,strain rate evolution and energy dissipation of fissured and anchored rocks were respectively obtained by SHPB tests.It was found that bolt can provide supporting efficiency-improving effect for fissured rock against dynamic disturbance,and this effect increased quadratically with decrease in anchoring angles.Then,the energy dissipation mechanism of anchored rock was obtained by slipping model.Furthermore,bolt energy-absorbing mechanism by instantaneous tensile-shear deformation was expressed based on material mechanics,which was the larger the anchoring angle,the smaller the energy absorption,and the less the contribution to supporting efficiency improvement.On this basis,the functional relationship between energy dissipation of anchored rock and energy absorption of bolt was established.Taking the coal-gangue separation system of Longgu coal mine as an example,the optimal anchoring angle can be determined as 57.5°–67.5°.Field monitoring showed fissured rock with the optimal anchoring angle,can not only effectively control the deformation,but also fully exert the energy-absorbing and efficiency-improving effect of bolt itself.This study provides guidance to the stability control and supporting design for deep engineering under the same or similar conditions.

关键词： Static and dynamic loads Anchored rock Energy absorption Anchoring angle Engineering verification

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

RIOK1 synergizes with TRIP13 by regulating the E2F-Rb signaling pathway to promote the proliferation of esophageal cancer cells

引用

Genes & Diseases 2024年第3期11卷 55-58页

作者： Chengyu li deyuan Pan Wan lin Danxia Deng Yingxin Zhou Hui Zhao Feng Pan liyan Xu Enmin li lin Long The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area Department of Biochemistry and Molecular BiologyShantou University Medical CollegeShantouGuangdong 515041China Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology Institute of Oncologic PathologyShantou University Medical CollegeShantouGuangdong 515041China Institute of Basic Medical Science Cancer Research CenterShantou University Medical CollegeShantouGuangdong 515041China Clinical Research Center Shantou Central HospitalShantouGuangdong 515041China

Esophageal cancer is one of the leading causes of cancer death in the world,with approximately half of the new cases occurring in China every year.^(1)Esophageal squamous cell carcinoma(ESCC)is the main subtype,accounting for more than 90%,and the five-year survival rate is less than 10%.Using large-scale genome analysis,many driver mutations and key pathways associated with ESCC have been identified.However,these genomic signatures have not improved the clinical management of EscC patients,or established effective targeted therapy.^(2)Esophageal cancer still lacks representative molecular markers.

关键词： cancer esophageal Esophageal

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

Bronchoalveolar lavage fluid metagenomic next-generation sequencing assay for identifying pathogens in lung cancer patients

引用

BIOCELL 2024年第4期48卷 623-637页

作者： JIYU WANG HUIXIA li deyuan ZHOU liHONG BAI KEJING TANG Division of Pulmonary and Critical Care Medicine The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina Institute of Pulmonary Diseases Sun Yat-sen UniversityGuangzhouChina Department of Pharmacy The First Affiliated HospitalSun Yat-sen UniversityGuangzhouChina

Background:For patients with lung cancer,timely identiﬁcation of new lung lesions as infectious or non-infectious,and accurate identiﬁcation of pathogens is very important in improving OS of patients.As a new auxiliary examination,metagenomic next-generation sequencing(mNGS)is believed to be more accurate in diagnosing infectious diseases in patients without underlying diseases,compared with conventional microbial tests(CMTs).We designed this study toﬁnd out whether mNGS has better performance in distinguishing infectious and non-infectious diseases in lung cancer patients using bronchoalveolar lavageﬂuid(BALF).Materials and Methods:This study was a real-world retrospective review based on electronic medical records of lung cancer patients with bronchoalveolar lavage(BAL)and BALF commercial mNGS testing as part of clinical care from 1 April 2019 through 30 April 2022 at The First Afﬁliated Hospital of Sun Yat-sen University.164 patients were included in this study.Patients were categorized into the pulmonary non-infectious disease(PNID)group(n=64)and the pulmonary infectious disease(PID)group(n=100)groups based onﬁnal diagnoses.Results:BALF mNGS increased the sensitivity rate by 60%compared to CMTs(81%vs.21%,p0.1).Among the patients with PID,bacteria were the most common cause of infection.Fungal infections occurred in 32%of patients,and Pneumocystis Yersini was most common.Patients with Tyrosine kinase inhibitors(TKIs)therapy possess longer overall survival(OS)than other anti-cancer agents,the difference between TKIs and immuno-checkpoint inhibitors(ICIs)was insigniﬁcant(median OS TKIs vs.ICIs vs.Anti-angiogenic vs.Chemo vs.Radiotherapy=76 vs.84 vs.61 vs.58 vs.60).Conclusions:our study indicates that BALF mNGS can add value by improving overall sensitivity in lung cancer patients with potential pulmonary infection,and was outstanding in identifying Pneumocystis infection.It could be able to help physicians adjust the follow-up treatmen

关键词： Lung cancer Bronchoalveolar lavage fluid Metagenomic next-generation sequencing Infectious diseases

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

Jackknife empirical likelihood test for the equality of degrees of freedom in t-copulas

引用

Science China Mathematics 2020年第4期63卷 789-822页

作者： Yanxi Hou deyuan li Aiai liu liang Peng School of Data Science Fudan UniversityShanghai 200433China School of Management Fudan UniversityShanghai 200433China Department of Mathematics Tongji UniversityShanghai 200092China Department of Risk Management and Insurance Georgia State UniversityAtlantaGA 30303USA

It has been argued that fitting a t-copula to financial data is superior to a normal copula. To overcome the shortcoming that a t-copula only has one parameter for the degrees of freedom, the t-copula with multiple parameters of degrees of freedom has been proposed in the literature, which generalizes both the t-copulas and the grouped t-copulas. like the inference for a t-copula, a computationally efficient inference procedure is to first estimate the correlation matrix via Kendall's τ and then to estimate the parameters of degrees of freedom via pseudo maximum likelihood estimation. This paper proposes a jackknife empirical likelihood test for testing the equality of some parameters of degrees of freedom based on this two-step inference procedure, and shows that the Wilks theorem holds.

关键词： jackknife empirical likelihood t-Copula

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

不同加热环境下钛表面Ni/Al涂层制备与高温氧化性

引用

表面技术 2024年第1期53卷 192-201页

作者：李光全李德元张楠楠范喜宁沈阳工业大学沈阳110870

目的研究大气与真空加热处理后Ni/Al涂层的金属间化合物析出规律,以及扩散层的生长速度,从而确定涂层的抗氧化性能。方法分别采用电弧喷涂技术和等离子喷涂技术在纯钛基体表面制备Ni/Al涂层。将样品分别在大气条件和真空条件下进行加... 详细信息

目的研究大气与真空加热处理后Ni/Al涂层的金属间化合物析出规律,以及扩散层的生长速度,从而确定涂层的抗氧化性能。方法分别采用电弧喷涂技术和等离子喷涂技术在纯钛基体表面制备Ni/Al涂层。将样品分别在大气条件和真空条件下进行加热处理,使Ni/Al涂层原位反应生成Ni-Al金属间化合物,并进行涂层抗氧化性试验。结果 Ni/Al涂层在大气环境700℃加热处理后,形成以Al_(2)O_(3)、Ni2Al3和富Al相NiAl3相为主的扩散层;在真空环境700℃加热处理后,形成以Ni2Al3、NiAl3相为主的扩散层。通过扩散反应动力学分析发现,真空热处理比大气热处理后Ni和Al之间的反应扩散系数更高,扩散系数为89.731μm2/h。氧化增重试验表明,真空处理后,Ni/Al涂层由于金属间化合物层较厚,且具有大量的高熔点的Ni2Al3相,并且经过800℃下氧化200h后,涂层未发生失效。结论真空环境下加热处理原位反应后,Ni/Al复合涂层的扩散速率更高,更容易形成Ni-Al金属间化合物,获得更厚的金属间化合物层。与大气热处理相比,经过真空热处理后的涂层有更良好的抗高温氧化能力。

关键词： Ni/Al涂层等离子喷涂电弧喷涂 Ni-Al金属间化合物高温氧化热处理

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

Application of autoregressive tail-index model to China’s stock market

引用

Statistical Theory and Related Fields 2021年第1期5卷 31-34页

作者： Jingyu Ji deyuan li School of Data Science Fudan UniversityShanghaiPeople’s Republic of China School of Management Fudan UniversityShanghaiPeople’s Republic of China

We congratulate Professor Zhengjun Zhang for a topnotch contribution to the literature and thank the editor for the invitation to participate in the discussion of the excellent review paper.Zhang(2020)provides an informative summary ofmodelling systematic riskwith nonlinear time seriesmodels and tail dependencemeasures based on extreme observations.In the current era,where risk management is becoming more and more important,this review paper is timely and will provide the impetus for future research in this and broader areas.

关键词： editor becoming extreme

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

不锈钢表面Al/Cu涂层制备与第一性原理计算

引用

沈阳工业大学学报 2024年第2期46卷 165-171页

作者：李德元李光全张楠楠沈阳工业大学材料科学与工程学院辽宁沈阳110870

为了研究Al/Cu涂层中金属间化合物的生成顺序和形成机理,在304不锈钢基体表面制备了Al/Cu涂层。对试样进行热处理使得Al/Cu涂层原位反应生成金属间化合物,随后测试了涂层的高温抗氧化性能。采用第一性原理计算Al-Cu金属间化合物的焓、... 详细信息

为了研究Al/Cu涂层中金属间化合物的生成顺序和形成机理,在304不锈钢基体表面制备了Al/Cu涂层。对试样进行热处理使得Al/Cu涂层原位反应生成金属间化合物,随后测试了涂层的高温抗氧化性能。采用第一性原理计算Al-Cu金属间化合物的焓、熵、吉布斯自由能和热容等数据。将热力学和扩散动力学相结合,提出有效生成自由能模型来预测化合物在Al/Cu界面的生成顺序。结果表明:Al/Cu涂层中首先形成Al_(2)Cu相,在Al/Cu界面处出现了AlCu相,加热时间增加至20 h后出现了富Cu的Al_(4)Cu_(9)相。由第一性原理计算得出,Al-Cu金属间化合物的形成顺序为Al_(2)Cu→AlCu→Al_(4)Cu_(9),与实验结果一致。此外,氧化实验结果表明,涂层具有良好高温抗氧化性能。

关键词： Al/Cu涂层 304不锈钢电弧喷涂等离子喷涂第一性原理计算金属间化合物抗高温氧化热处理

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

Impact of hot alkali modification conditions on secondary structure of peanut protein and embedding rate of curcumin

引用

Food Science and Human Wellness 2019年第3期8卷 283-291页

作者： Wei li Shugang li Yong Hu Mengzhou Zhou Chao Wang Dongsheng li deyuan li Hubei University of Technology Wuhan430068China Hubei Cooperative Innovation Center for Industrial Fermentation Wuhan430068China Function Food Engineering Center of Hubei province Hubei University of Chinese MedicineWuhan430068China

This study aimed to modify isolated and extracted peanut protein with hot alkali to study the impact of pH,heating temperature,processing time and other alkali liquor conditions on the molecular structure of the peanut.Curcumin was loaded in modified peanut protein.The results of the study are as follows:Within the alkaline range of 8lices andβ-sheets gradually decreased with increasing pH,while that of random coils gradually increased with increasing pH,reaching a maximum 11.24±0.87%when the pH was 11(plices and AAR gradually decreased with increasing heating temperature;they remained unchanged when the heating temperature was 90℃,and then decreased to(10.41±1.18%;plices decreased from 11.83±1.04%to 10.75±2.34%with increased heating time(pli modification of peanut protein as followed:heating temperature of 90℃,heating time of 20 min and a pH of alkali liquor of 11.Under these optimum conditions,the embedding rate of curcumin by the modified protein can reach 88.32±1.29%.

关键词： Curcumin Embedding rate Hot alkali modification Peanut protein Secondary structure

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

Creep behavior and effect factors of a TiAl–Nb alloy at high temperature

引用

Progress in Natural Science:Materials International 2021年第3期31卷 477-485页

作者： Shunke Zhang Sugui Tian Gengyu li Ning Tian Fangwei Jin Huichen Yu Xiaoxia Lv Guangyan Wang deyuan li Shenyang University of Technology Guizhou University of Engineering Science Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation Science and Technology on Advanced High Temperature Structural Materials Laboratory AVIC Beijing Institute of Aeronautical Materials

The effect of solution treatment on the microstructure and creep properties of forged TiAl-Nb alloys was investigated.The results showed that the microstructure of forged alloy mainly consisted of γ/αlamellar colonies and fine equiaxed recrystallized γ/αgrains.During the solution treatment the microstructure of the alloy transformed into a fully lamellar structure due to the lamellar colonies growth by consuming equiaxed grains.Compared with the forged alloy the creep life of the solution treated alloy at 800℃/220 MPa increased from 116 h to 339 h.The better creep resistance may be attributed to the transform of fine equiaxed γ/αgrain to the lamellar colonies with serrated grain boundaries due to the solution treatment.The deformation mechanism of the solution treated alloy during creep is considered to be dislocation slipping within the lamellar γ/αphases,and the dislocation movement may be hindered by the γ/αinterface and the formation of dislocation tangles.The interaction of the dislocations with the tangles may increase the resistance of the dislocation motion and hence improve the creep resistance of the alloy.It was found that during the creep of the forged alloys the cracks mainly initiated at the equiaxed grain,and in the solution treated alloy the cracks initiated at the grain boundaries.As creep continued the cracks propagated and connected to each other,leading to the damage and rupture of the forged and solution treated alloys.

关键词： Forged TiAl–Nb alloy Solution treatment Microstructure Creep Deformation and damage

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

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：