检索结果-南通市图书馆

Chinese Journal of Chemistry 2020年第12期38卷 1629-1634页

作者： Zhong-Bo Zheng wen-fu cheng Lijia Wang Jun Zhu Xiu-Li Sun Yong Tang The State Key Laboratory of Orgonometallic Chemistry Shanghai Institute of Organic ChemistryCASUniversity of Chinese Academy of Sciences345 Lingling LuShanghai 200032China Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development Department of ChemistryEast China Normal University3663 North Zhongshan RoadShanghai 200062China

of main observation and conclusion A copper catalyzed enantioselective[3+2]annulation of donor-acceptor cyclopropanes with cyclic ketones has been developed,providing a concise protocol to enantioenriched l-oxaspiro[4.5]decanes in up to 98%yield with up to>99/1 dr and up to 92%*** addition,this method also provides a facile access to the enantioselective desymmetrisation of various 4-substituted *** resulting products were easily converted to the core structures of two natural products Heliespirones A and halogenated sesquiterpene isolated from L saitoi.

关键词： spiro Catalytic substituted

Research progress on narrative education in clinical nursing education

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

Chinese Nursing Research 2016年第4期3卷 151-153页

作者： wen-fu cheng Ti-Yu Zhao Yue Guo Operation Room Affiliated Tongji HospitalTongji Medical College of Huazhong University of Science and Technology

This article introduces the concept and mode of narrative education in addition to the application of narrative education in clinical nursing education. A summary is presented of the application of narrative education in this clinical nursing context from several aspects, including providing a display platform and various other teaching forms for the teachers＇ use, promoting the professional quality of teachers and students, and facilitating the teaching of abstract concepts.

关键词： Narrative educationClinical nursing educationHumanistic careResearch progressEducation method

耦合低温热源的亚临界有机朗肯循环系统参数优化

在线全文

学校读者我要写书评

暂无评论

工程热物理学报 2017年第9期38卷 1837-1843页

作者：张超付经伦付文成王志刚天津市先进机电系统设计与智能控制实验室天津300384 机电工程国家级实验教学示范中心(天津理工大学) 天津300384 中国科学院工程热物理研究所北京100190

以亚临界有机朗肯简单循环为研究对象,理论分析得到影响系统性能的独立变量:膨胀机进口温度、进口压力、冷凝温度和热源出口温度。当给定冷凝温度且以蒸发器窄点温差为约束变量时,独立变量减少为膨胀机进口温度和进口压力。在此基础上,... 详细信息

以亚临界有机朗肯简单循环为研究对象,理论分析得到影响系统性能的独立变量:膨胀机进口温度、进口压力、冷凝温度和热源出口温度。当给定冷凝温度且以蒸发器窄点温差为约束变量时,独立变量减少为膨胀机进口温度和进口压力。在此基础上,以耦合低温热源时的系统热效率作为评价指标,对8种常用有机工质的亚临界简单系统性能的变化规律进行分析,得到循环系统全局最优性能的运行参数。结果表明:系统热效率由循环热效率和热源效率共同决定,采用有机工质R236fa、R123和R236ea的循环热效率相对较高;由于热源的耦合作用,采用有机工质R236fa、RC318和R236ea的系统热效率相对较高。

关键词：有机朗肯循环亚临界简单循环窄点温差性能优化

在线全文

学校读者我要写书评

暂无评论

带式输送机启动时间和带负荷启动的验算

起重运输机械 2007年第2期 35-37页

作者：温富成唐山德伯特机械有限公司河北唐山市缸窑路2号063000

带式输送机启动时产生的动张力将使各部件的负荷显著增大,安全系数降低,从而影响启动时的平稳性。目前大功率、长距离、高强度带式输送机,对启动时的稳定性要求越来越高。本文给出了启动时间和电机功率的验算方法。

关键词：带式输送机启动时间功率验算

Advancements and Challenges in Organic–Inorganic Composite Solid Electrolytes for All‑Solid‑State Lithium Batteries

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 46-97页

作者： Xueyan Zhang Shichao cheng Chuankai fu Geping Yin Liguang Wang Yongmin Wu Hua Huo State Key Laboratory of Space Power‑Sources School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310058People’s Republic of China State Key Laboratory of Space Power-Sources 2965 Dongchuan RoadMinhang DistrictShanghai 200240People’s Republic of China

To address the limitations of contemporary lithium-ion batteries,particularly their low energy density and safety concerns,all-solid-state lithium batteries equipped with solid-state electrolytes have been identified as an up-and-coming *** the various SEs,organic–inorganic composite solid electrolytes(OICSEs)that combine the advantages of both polymer and inorganic materials demonstrate promising potential for large-scale ***,OICSEs still face many challenges in practical applications,such as low ionic conductivity and poor interfacial stability,which severely limit their *** review provides a comprehensive overview of recent research advancements in ***,the influence of inorganic fillers on the main functional parameters of OICSEs,including ionic conductivity,Li+transfer number,mechanical strength,electrochemical stability,electronic conductivity,and thermal stability are systematically *** lithium-ion conduction mechanism of OICSE is thoroughly analyzed and concluded from the microscopic ***,the classic inorganic filler types,including both inert and active fillers,are categorized with special emphasis on the relationship between inorganic filler structure design and the electrochemical performance of ***,the advanced characterization techniques relevant to OICSEs are summarized,and the challenges and perspectives on the future development of OICSEs are also highlighted for constructing superior ASSLBs.

关键词： Composite solid electrolytes Inorganic filler Interfacial stability Li-ion conduction mechanism Characterization techniques

Gradient‑Layered MXene/Hollow Lignin Nanospheres Architecture Design for Flexible and Stretchable Supercapacitors

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 447-462页

作者： Haonan Zhang cheng Hao Tongtong fu Dian Yu Jane Howe Kaiwen Chen Ning Yan Hao Ren Huamin Zhai Jiangsu Provincial Key Lab of Sustainable Pulp and Paper Technology and Biomass Materials NanJing Forestry UniversityNanjing 210037People’s Republic of China Department of Chemical Engineering and Applied Chemistry University of Toronto200 College StreetTorontoON M5S 3E5Canada Department of Materials Science and Engineering University of Toronto184 College StreetTorontoON M5S 3E4Canada College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037People’s Republic of China

With the rapid development of flexible wearable electronics,the demand for stretchable energy storage devices has *** this work,a novel gradient-layered architecture was design based on single-pore hollow lignin nanospheres(HLNPs)-intercalated two-dimensional transition metal carbide(Ti_(3)C_(2)T_(x) MXene)for fabricating highly stretchable and durable *** depositing and inserting HLNPs in the MXene layers with a bottom-up decreasing gradient,a multilayered porous MXene structure with smooth ion channels was constructed by reducing the overstacking of MXene ***,the micro-chamber architecture of thin-walled lignin nanospheres effectively extended the contact area between lignin and MXene to improve ion and electron accessibility,thus better utilizing the pseudocapacitive property of *** these strategies effectively enhanced the capacitive performance of the *** addition,HLNPs,which acted as a protective phase for MXene layer,enhanced mechanical properties of the wrinkled stretchable electrodes by releasing stress through slip and deformation during the stretch-release cycling and greatly improved the structural integrity and capacitive stability of the *** electrodes and symmetric flexible all-solid-state supercapacitors capable of enduring 600%uniaxial tensile strain were developed with high specific capacitances of 1273 mF cm^(−2)(241 F g^(−1))and 514 mF cm^(−2)(95 F g^(−1)),***,their capacitances were well preserved after 1000 times of 600%stretch-release *** study showcased new possibilities of incorporating biobased lignin nanospheres in energy storage devices to fabricate stretchable devices leveraging synergies among various two-dimensional nanomaterials.

关键词： Hollow lignin nanospheres MXene Gradient-layered architecture Wrinkled electrodes Stretchable supercapacitors

Moment Redistribution Effect of the Continuous Glass Fiber Reinforced Polymer-Concrete Composite Slabs Based on Static Loading Experiment

在线全文

学校读者我要写书评

暂无评论

Structural Durability & Health Monitoring 2025年第1期19卷 105-123页

作者： Zhao-Jun Zhang wen-Wei Wang Jing-Shui Zhen Bo-cheng Li De-cheng Cai Yang-Yang Du Hui Huang Offshore Oil Engineering Co.Ltd. Tianjin300461China Department of Bridge Engineering School of TransportationSoutheast UniversityNanjing211189China

This study aimed to investigate the moment redistribution in continuous glass fiber reinforced polymer(GFRP)-concrete composite slabs caused by concrete cracking and steel bar yielding in the negative bending moment *** experimental bending moment redistribution test was conducted on continuous GFRP-concrete composite slabs,and a calculation method based on the conjugate beam method was *** composite slabs were formed by combining GFRP profiles with a concrete layer and supported on steel beams to create two-span continuous composite slab *** methods,epoxy resin bonding,and stud connection,were used to connect the composite slabs with the steel *** experimental findings showed that the specimen connected with epoxy resin exhibited two moments redistribution phenomena during the loading process:concrete cracking and steel bar yielding at the internal *** contrast,the composite slab connected with steel beams by studs exhibited only one-moment redistribution phenomenon throughout the loading *** the concrete at the internal support cracked,the bending moment decreased in the internal support section and increased in the midspan *** the steel bars yielded,the bending moment further decreased in the internal support section and increased in the mid-span *** GFRP profiles do not experience cracking,there was no significant decrease in the bending moment of the mid-span *** test specimens experienced compressive failure of concrete at the mid-span *** results showed good agreement between the calculated and experimental values of bending moments in the mid-span section and internal support *** proposed model can effectively predict the moment redistribution behavior of continuous GFRP-concrete composite slabs.

关键词： Moment redistribution GFRP-concrete composite slabs bending moment experimental study analysis model

大比例尺土壤数据库的组织与设计研究——以安徽宣城样区为例

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

土壤通报 2004年第2期35卷 122-125页

作者：吕成文沈德福陈云丰安徽师范大学国土资源与旅游学院安徽芜湖241000

以安徽宣城样区为例,就大比例尺土壤数据库的组织与设计进行了系统地研究。分析了大比例尺土壤数据库的特点及组织原则,在此基础上,进一步就大比例尺土壤数据库空间制图单元构建及其属性数据的采集、组织、管理等问题作了详细地探讨,并... 详细信息

以安徽宣城样区为例,就大比例尺土壤数据库的组织与设计进行了系统地研究。分析了大比例尺土壤数据库的特点及组织原则,在此基础上,进一步就大比例尺土壤数据库空间制图单元构建及其属性数据的采集、组织、管理等问题作了详细地探讨,并在GIS软件支持下完成了样区土壤数据库设计。

关键词：大比例尺土壤数据库安徽宣城样区田间管理设计

在线全文

学校读者我要写书评

暂无评论

电缆在5G网络的应用

价值工程 2020年第22期39卷 188-189页

作者：文承福天津职业技术学院天津300000

随着5G通信网络应用的不断发展,如何有效的在特殊的空间对通信信号进行覆盖建设,成为人们关注的重点问题,利用电缆可以有效的解决5G信号的覆盖问题。通过对5G通信电缆的特征与关键技术进行分析,探讨了5G通信电缆在室内5G信号覆盖、电梯... 详细信息

随着5G通信网络应用的不断发展,如何有效的在特殊的空间对通信信号进行覆盖建设,成为人们关注的重点问题,利用电缆可以有效的解决5G信号的覆盖问题。通过对5G通信电缆的特征与关键技术进行分析,探讨了5G通信电缆在室内5G信号覆盖、电梯高层空间中的应用覆盖方法,并对比了5G电缆在通信网络建设的优势。

关键词： 5G 通信网络电缆

Improving postoperative outcomes in patients with pancreatic cancer:Inflammatory and nutritional biomarkers

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Oncology 2025年第1期16卷 59-64页

作者： Chun-Han cheng wen-Rui Hao Tzu-Hurng cheng Department of Medical Education Linkou Chang Gung Memorial HospitalTaoyuan 33305Taiwan Division of Cardiology Department of Internal MedicineShuang Ho HospitalMinistry of Health and WelfareTaipei Medical UniversityNew Taipei 23561Taiwan Division of Cardiology Department of Internal MedicineSchool of MedicineCollege of MedicineTaipei Medical UniversityTaipei 11002Taiwan Department of Biochemistry School of MedicineCollege of MedicineChina Medical UniversityTaichung 404328Taiwan

This editorial assesses the prognostic value of preoperative inflammatory and nutritional biomarkers in patients undergoing surgical resection for pancreatic *** et al evaluated the ability of seven biomarkers to predict postoperative recovery and long-term *** biomarkers were albumin-to-globulin ratio,prognostic nutritional index(PNI),systemic immune-inflammation index,neutrophil-to-lymphocyte ratio,platelet-to-lymphocyte ratio,nutritional risk index,and geriatric nutritional risk *** PNI was found to be a strong predictor of both overall and recurrence-free survival,underscoring its clinical relevance in managing patients with pancreatic cancer.

关键词： Pancreatic cancer Prognostic nutritional index Systemic immune-inflammation index Postoperative recovery Prognosis