检索结果-南通市图书馆

Fluorescent carbon dots synthesized in solid phase and air for application in LEDs

Nano Research 2024年第9期17卷 8495-8503页

作者： Wei-Jie Zheng Zhao-Nan Sun Yi-ming Wang Huan-ming xiong Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan UniversityShanghai 200438China

Carbon dots(CDs)have been widely adopted as optical materials because of their excellent luminescent ***,most of the reported synthetic methods are conducted in solvents,especially hydrothermal/solvothermal reactions,leading to intractable problems such as toxic and flammable solvents,complex and inseparable by-products,and dangerously high pressures and ***-phase synthesis of CDs in air is an effective solution to overcome the above issues,but solid reactions always result in uncontrolled growth and agglomeration of *** this study,some inorganic salts are selected as catalysts for synthesizing CDs in solid states and air,which also play as dispersants to hinder CDs *** the meantime,some aromatic derivatives containing hydroxyl and amino groups are chosen as carbon sources,ground with the optimized catalyst,and then heated together in *** production yields are affected by the reaction time and reactant ratio,while the graphitization degrees of the CDs are determined by the reaction *** IG/ID value of their Raman spectra increases from 0.59 to 0.85,and the particle size decreases from 2.5 to 1.4 nm when the synthesis temperature is increased from 200 to 280℃.The as-prepared CDs show emission peaks ranging from 366 to 606 nm,with the photoluminescence(PL)quantum yield up to 53%.Their emission color variation mainly results from different carbon sources,which can be ascribed to the differences in the element composition,functional groups,and graphitic nitrogen content of these *** dispersing CDs of different concentrations into polyvinyl alcohol(PVA)and combining them with blue LEDs,cold,standard,and warm white light emitting devices(WLEDs)are prepared,with a color rendering index(CRI)up to *** the as-prepared CDs have antioxidant ability at high temperature,the as-prepared WLEDs have long lifespans,remaining the effective white luminescence after 72 h continuous work.

关键词： carbon dot solid-phase synthesis white LED photoluminescence inorganic salt catalysis

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

On traceable iterated line graph and hamiltonian path index

引用

Applied Mathematics(A Journal of Chinese Universities) 2024年第2期39卷 239-252页

作者： NIU Zhao-hong xiong Li-ming YANG Wei-hua School of Mathematical Sciences Shanxi UniversityTaiyuan 030006China School of Mathematics and Statistics Beijing Key Laboratory on MCAACIBeijing Institute of TechnologyBeijing 100081China Department of Mathematics Taiyuan University of TechnologyTaiyuan 030024China

xiong and Liu[21]gave a characterization of the graphs G for which the n-iterated line graph L^(n)(G)is hamiltonian,for n≥*** this paper,we study the existence of a hamiltonian path in L^(n)(G),and give a characterization of G for which L^(n)(G)has a hamiltonian *** applications,we use this characterization to give several upper bounds on the hamiltonian path index of a graph.

关键词： iterated line graph traceable hamiltonian index hamiltonian path index

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

Performance Characterization of CR/PU Asphalt for Potential Application in Assembled Fast-Repairing Engineering

引用

Fluid Dynamics & Materials Processing 2024年第5期20卷 1063-1074页

作者： Hong Pang Ao Lu ming xiong Chen Chen Xian Cao xiong Xu Jing Wang Hubei Regional Management Headquarters CCCC Asset Management Co.Ltd.Beijing101399China School of Civil Engineering and Architecture Wuhan Institute of TechnologyWuhan430073China Hubei Provincial Engineering Research Center for Green Civil Engineering Materials and Structures Wuhan Institute of TechnologyWuhan430073China

Conventional repairing methods for asphalt pavement have some inconveniences,such as insufficient strength,and are typically *** address these issues,this study proposes a new technological method to design and prepare a high-performance assembled asphalt concrete block for fast repair of the potholes.A series of composite modified asphalt binders with 10%crumb rubber(CR)and different dosages(0%,1%,3%,5%)of polyurethane(PU)are examined to determine the optimized ***,the corresponding asphalt mixtures are prepared for further comparison and assessment of engineering properties,such as moistureinduced damage,high-temperature deformation,and low-temperature cracking *** test results show that PU can significantly improve the high-temperature performance and hardness of(crumb rubber modified asphalt)CRMA binder;3%PU contributes allowing the resistance of CRMA mixture to moisture-induced damage at higher levels,particularly under water whole immersion;as 3%PU is added,the high-temperature rutting deformation resistance of the CRMA mixture increases significantly,and the low-temperature anti-cracking properties are also improved ***,the innovatively designed high-quality assembled fast-repairing asphalt concrete block is recommended as an appropriate option for highway maintenance.

关键词： Composite modified asphalt crumb rubber polyurethane assembled fast-repairing asphalt concrete maintenance engineering

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

Physical-Rheological Properties and Performances of Rejuvenated(Styrene-Butadiene-Styrene)Asphalt with Polymerized-MDI and Aromatic Oil

引用

Fluid Dynamics & Materials Processing 2024年第7期20卷 1633-1646页

作者： Ao Lu ming xiong Chen Chen Liangjiang Li Haibei Tan xiong Xu Hubei Regional Management Headquarters CCCC Asset Management Co.Ltd.Beijing101399China School of Civil Engineering and Architecture Wuhan Institute of TechnologyWuhan430073China Hubei Provincial Engineering Research Center for Green Civil Engineering Materials and Structures Wuhan Institute of TechnologyWuhan430073China

Traditional asphalt rejuvenators,like aromatic oil(AO),are known to be effective in improving the low-temperature properties and fatigue performances of aged SBS(styrene-butadiene-styrene)modified asphalt(SBSMA)binders and ***,these rejuvenators inevitably compromise their high-temperature properties and deformation resistances because they dilute asphalt binder but do not fix the damaged structures of aged *** this study,a highly-active chemical called polymerized 4,4-diphenylmethane diisocyanate(PMDI)was used to assist the traditional AO asphalt *** physical and rheological characteristics of rejuvenated SBSMA binders and the moisture-induced damage and rut deformation performances of corresponding mixtures were comparatively *** results showed that the increasing proportion of AO compromises the hightemperature property and hardness of aged SBSMA binder,and an appropriate amount of PMDI works to compensate such losses;3%rejuvenator at mass ratio of AO:PMDI=70:30 can have a rejuvenated SBSMA binder with a high-temperature performance similar to that of fresh binder,approximately at 71.4°C;the use of AO can help reduce the viscosity of PMDI rejuvenated SBSMA binder for improving its workability;PMDI can help improve the resistance of AO rejuvenated SBSMA binder to deformation,especially at elevated temperatures,through its chemical reactions with aged SBS;moisture induction can enhance the resistance to damage of rejuvenated mixtures containing AO/PMDI or only PMDI;and the rejuvenator with a mass ratio of AO:PMDI=70:30 can lead the rejuvenated mixture to meet the application requirement,with a rut depth of only 2.973 mm,although more PMDI can result in a higher resistance of rejuvenated mixtures to high-temperature deformation.

关键词： Aged SBS modified asphalt polymerized 4,4-diphenylmethane diisocyanate aromatic oil physical properties rheological properties mixture performance

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

Effect of programmed comprehensive nursing on delirium incidence in intensive care unit children following severe cardiac surgery

引用

World Journal of Psychiatry 2024年第9期14卷 1301-1307页

作者： Qiu-Yue Wang Xiang Wang ming-xiong Li Department of Cardiothoracic Surgery Children’s Hospital of Nanjing Medical UniversityNanjing 210000Jiangsu ProvinceChina

BACKGROUND Programmed comprehensive nursing was adopted for intensive care unit(ICU)children following severe cardiac surgery to improve respiratory function and delirium *** To explore how programmed comprehensive nursing impacts respiratory func-tion and delirium incidence in ICU children post cardiac *** Between January 2022 and January 2024,180 pediatric patients from the Chil-dren’s Hospital of Nanjing were admitted to the ICU after cardiac surgery and randomly *** control group comprised 90 patients and received routine nursing *** observation group comprised 90 patients and received program-med comprehensive *** groups received continuous nursing care until *** respiratory function,incidence of delirium,and clinical outcomes were *** memory state and sleep quality of both groups were *** The incidence of delirium was 5.56%in the observation group when admitted to ICU,which was lower than that in the control group(20.00%;P<0.05).The observation group demonstrated higher peak expiratory flow rate,respiratory frequency,deep breathing volume,and tidal volume in the ICU compared with the control ***,the observation group showed higher sleep depth,sleep latency,night awakening,return to sleep,and sleep quality com-pared with the control group(P<0.05).CONCLUSION Programmed comprehensive nursing in ICU patients following severe cardiac surgery can reduce the impact on respiratory function,improve sleep quality,and alleviate postoperative delirium,showing significant promise for clinical application.

关键词： Programmed comprehensive nursing Intensive care unit Cardiac surgery Respiratory function Delirium

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

LncRNA MEG3 Inhibits the Epithelial-mesenchymal Transition of Bladder Cancer Cells through the Snail/E-cadherin Axis

引用

当代医学科学（英文） 2024年第4期44卷 726-734页

作者： Liang WANG Ping WANG Bing LIU Hui ZHANG Cheng-cheng WEI ming xiong Gang LUO Miao WANG Department of Urology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of Clinical Laboratory Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of Urology The Central Hospital of WuhanTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430014China

Objective:This study aimed to investigate the role of the long noncoding RNA(lncRNA)maternally expressed gene 3(MEG3)in the epithelial-mesenchymal transition(EMT)of bladder cancer cells and the potential ***:Cell invasion,migration,and wound healing assays were conducted to assess the effects of MEG3 on the invasive and migratory capabilities of bladder cancer *** expression levels of E-cadherin were measured using Western blotting,RT-qPCR,and dual luciferase reporter *** immunoprecipitation and pull-down assays were performed to investigate the interactions between MEG3 and its downstream ***:MEG3 suppressed the invasion and migration of bladder cancer cells and modulated the transcription of *** binding of MEG3 to the zinc finger region of the transcription factor Snail prevented its ability to transcriptionally repress ***,MEG3 suppressed the phosphorylation of extracellular regulated protein kinase(ERK),c-Jun N-terminal kinase(JNK),and P38,thereby decreasing the expression of Snail and stimulating the expression of ***:MEG3 plays a vital role in suppressing the EMT in bladder cancer cells,indicating its potential as a promising therapeutic target for the treatment of bladder cancer.

关键词： Snail bladder cancer epithelial-mesenchymal transition long noncoding RNA maternally expressed gene 3

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

Parameter estimation of Nakagami-gamma shadow fading model based on minimum KL divergence

引用

The Journal of China Universities of Posts and Telecommunications 2024年

作者： Xie Wenwu Zhou Jiachen xiong ming Ouyang Jingcheng Yu Chao School of Information Science and Engineering， Hunan Institute of Science and Technology

The Nakagami-gamma (NG) shadow decay model based on the moment-based method (MoM) generates lower tail approximation， which is inaccuracy when the gamma random variables are replaced by the lognormal random variables. The channel parameters of composite NG shadow fading based on the method of minimizing the Kullback-Leibler (KL) divergence were estimated and a closed expression for the system bit error rate (BER) was derived in this paper. The simulation results show that the KL estimated parameters solve the lower tail approximation problem， and the replacement effect of the lognormal function by the gamma function is better than the MoM when the shading parameters are around the typical value of 4-9 dB. Moreover， the KL method has a lower MSE value for the channel analysis.

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

从史体到文体:传记体的文体化与传记文的兴起——以《张巡中丞传》《张中丞传后叙》为中心的考察

引用

清华大学学报（哲学社会科学版） 2024年第5期39卷 110-122,241页

作者：熊明中国海洋大学中文系青岛266100

至德二载(757)十月,睢阳城陷,张巡等死难。作为安史之乱中的著名事件,对张巡及其坚守睢阳是非功过的讨论,成为唐王朝当时及后来相当长时期备受关注的公共事件。上元二年(761),李翰为此作《张巡中丞传》,元和二年(807),韩愈又作《张中丞... 详细信息

至德二载(757)十月,睢阳城陷,张巡等死难。作为安史之乱中的著名事件,对张巡及其坚守睢阳是非功过的讨论,成为唐王朝当时及后来相当长时期备受关注的公共事件。上元二年(761),李翰为此作《张巡中丞传》,元和二年(807),韩愈又作《张中丞传后叙》。从李翰作《张巡中丞传》到韩愈作《张中丞传后叙》,不仅跟时事政治密切相关,在文学文体层面也有着特殊的意义,体现了传统杂传向传记文的转变,传记体也在这一过程中实现了由史体向文体的拓展,以此为标志,传记文兴起并成为此后历代文学特别是古文写作的重要文体。

关键词：《张巡中丞传》《张中丞传后叙》史体文体传记文

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

Management of a Retained Epidural Catheter in a Pregnant Patient: A Case Report and Review of Literature

引用

Open Journal of Anesthesiology 2024年第8期14卷 175-183页

作者： Kevin W. Tang mingzhuo Pei Aamod George Antoine Anderson ming xiong Rutgers New Jersey Medical School Newark New Jersey USA Department of Anesthesia & Perioperative Care Rutgers New Jersey Medical School Newark New Jersey USA

Background: Epidural anesthesia is an effective intervention to treat labor pain and provide analgesia for orthopedic procedures. A rare complication of this technique is epidural catheter retention. Case Presentation: In this case report, we present an otherwise healthy 21-year-old G2P0010 woman at 39 weeks and 3 days gestation whose anesthetic management was complicated by a symptomatic retained epidural catheter fragment. Computed tomography (CT) imaging of her spine showed the fractured catheter within her paraspinal muscles and neurosurgery recommended no surgical intervention at that time. The patient reported resolution of back pain while in the postpartum unit which she continues to endorse two weeks after discharge. Conclusion: Retained epidural catheter is a medical emergency that requires immediate imaging and neurological evaluation. While magnetic resonance imaging is typically regarded as the standard imaging modality for this complication, in epidural sets that contain metallic components, we suggest using CT to avoid the risk of thermal nerve damage. In cases where the patient does not report any acute complaints, nonsurgical management may be appropriate but close follow-up is required to monitor for catheter migration.

关键词： Epidural Obstetric Anesthesia Neuraxial Anesthesia Retained Catheter Computed Tomography

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

肌巨蛋白基因新位点突变致遗传性肌病伴早期呼吸衰竭1例并文献复习

引用

解放军医学杂志 2024年第6期49卷 651-655页

作者：熊明秀张静电子科技大学医学院四川成都610054 四川省医学科学院·四川省人民医院呼吸与危重症医学科四川成都610072

目的报道1例遗传性肌病伴早期呼吸衰竭(HMERF)的临床病理特征、基因突变位点、诊断与治疗情况并进行文献复习,以提高对该病的认识。方法回顾性分析2021年4月四川省人民医院收治的以呼吸衰竭为首发表现的遗传性肌病1例的临床资料、影像... 详细信息

目的报道1例遗传性肌病伴早期呼吸衰竭(HMERF)的临床病理特征、基因突变位点、诊断与治疗情况并进行文献复习,以提高对该病的认识。方法回顾性分析2021年4月四川省人民医院收治的以呼吸衰竭为首发表现的遗传性肌病1例的临床资料、影像学检查、组织病理和基因测序结果,以及诊断与治疗情况。结合文献报道总结中国HMERF患者的临床特征。结果本病例表现为四肢无力、呼吸困难进行性加重,肌肉MRI显示小腿腓肠肌内侧头选择性脂肪浸润;肌巨蛋白(TTN)基因的两个突变位点来自双亲,分别为341外显子c.94828G>A(P.a31610t)和50外显子c.14915C>T(P.S.4972L),诊断为HMERF;采用支持性治疗措施。在PubMed数据库检索到近10年报道的诊断为HMERF的中国患者15例,发病年龄(26.1±17.0)岁,多为男性,均检出TTN基因突变,突变类型以c.95195C>T(p.P31732L)较多,其次为c.95134T>C(p.C31712R)。结论HMERF是由基因突变引起的罕见遗传性疾病,骨骼肌无力和呼吸肌无力是主要临床表现,临床症状可不典型,TTN基因的344外显子是常见突变位点。本病例突变位点位于TTN基因的341外显子c.94828G>A(P.a31610t)和50外显子c.14915C>T(P.S4972L),可能为HMERF的新遗传标记。

关键词：遗传性肌病伴早期呼吸衰竭肌巨蛋白基因突变

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：