检索结果-南通市图书馆

Journal of Materiomics 2019年第4期5卷 663-669页

作者： En-Lai Zhao Shi-Xi Zhao Xia Wu Jing-Wei Li lu-qiang yu Ce-Wen Nan Guozhong Cao Graduate School at Shenzhen Tsinghua UniversityShenzhen518055China School of Materials Science and Engineering Tsinghua UniversityBeijing100084China Department of Materials Science and Engineering University of WashingtonSeattleWA98195-2120United States

A series of 20Li_(2)O-30V_(2)O_(5)-(50-x)SiO_(2)-xB_(2)O_(3)(mol.%)(x=10,20,30,40)glasses were prepared by the traditional melt-quenching *** amorphous nature of the glasses was determined by XRD,DSC and TEM *** measurement revealed the functional group of obtained *** EDS results confirmed the presence and uniform distribution of elements in the glasses.20Li_(2)O-30V_(2)O_(5)-40SiO_(2)-10B_(2)O_(3)(LVSB10)sample with the highest V^(4+) ratio exhibited the best cycling *** order to further improve cycling stability of LVSB10 sample,ball milling was employed to reduce the particle *** ball milled LVSB10 sample(LVSB10-b)showed an improved first discharge capacity,cycling stability and rate *** measurements showed that ball milling can effectively decrease charge transfer impedance and facilitate Li^(+) ion *** work provides a new way to explore a new type of cathode materials for lithium ion batteries.

关键词： Lithium ion battery Cathode materials Li_(2)O-V_(2)O_(5)-SiO_(2)-B_(2)O_(3)glass Electrochemical performance

Catalytic Performance of Carbon Smoke over Ag-LSCF Composite Catalysts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 30-34页

作者： GUO Guanlun HAN Ming lu Shaomin yu Jing JU Hongling 无 Hubei Key Laboratory of Advanced Technology for Automotive Components&Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of TechnologyWuhan 430070China College of Mechanical and Transportation Southwest Forestry UniversityKunming 650000China

To improve the catalytic performance of La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3)(LSCF)towards carbon soot,we utilized the impregnation method to incorporate Ag into the prepared LSCF *** conducted a series of characterization tests and evaluated the soot catalytic activity of the composite catalyst by comparing it with the LaCoO_(3) group,LaFeO_(3) group,and catalyst-free *** results indicate that the Ag-LSCF composite catalyst exhibits the highest soot catalytic activity,with the characteristic temperature values of 376.3,431.1,and 473.9℃at 10%,50%,and 90%carbon soot conversion,*** values are 24.8,20.2,and 23.1℃lower than those of the LSCF *** also shows that LSCF can improve the catalytic activity of soot after compounding with Ag,and reflects the necessity of using catalysts in soot combustion *** characterization and BET test show that Ag-LSCF has more abundant surface-adsorbed oxygen species,larger specific surface area and pore volume than LSCF,which also proves that Ag-LSCF has higher soot catalytic activity.

关键词： metallic composites carbon smoke oxidation perovskite catalyst soot

GFRF R-CNN:Object Detection Algorithm for Transmission Lines

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 1439-1458页

作者： Xunguang Yan Wenrui Wang Fanglin lu Hongyong Fan Bo Wu Jianfeng yu Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai201210China University of Chinese Academy of Sciences Beijing100049China Jingwei Textile Machinery Co. Ltd.Beijing100176China

To maintain the reliability of power systems,routine inspections using drones equipped with advanced object detection algorithms are essential for preempting power-related *** increasing resolution of drone-captured images has posed a challenge for traditional target detection methods,especially in identifying small objects in high-resolution *** study presents an enhanced object detection algorithm based on the Faster Regionbased Convolutional Neural Network(Faster R-CNN)framework,specifically tailored for detecting small-scale electrical components like insulators,shock hammers,and screws in transmission *** algorithm features an improved backbone network for Faster R-CNN,which significantly boosts the feature extraction network’s ability to detect fine *** Region Proposal Network is optimized using a method of guided feature refinement(GFR),which achieves a balance between accuracy and *** incorporation of Generalized Intersection over Union(GIOU)and Region of Interest(ROI)Align further refines themodel’s *** results demonstrate a notable improvement in mean Average Precision,reaching 89.3%,an 11.1%increase compared to the standard Faster *** highlights the effectiveness of the proposed algorithm in identifying electrical components in high-resolution aerial images.

关键词： Faster R-CNN transmission line object detection GIOU GFR

De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期 174-180页

作者： Fan-Xiao Meng Xing-yu Wang Ka lu Ju-Song Yang Fu-Min Zhang Ai-Jun Ma Bao Du Yong-qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. Furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

关键词：

同方期刊数据库

钕离子(Nd3+)的光谱性质——谱线位移与共价程度

在线全文

学校读者我要写书评

暂无评论

化学学报 1984年第7期42卷 697-700页

作者：苏锵吕玉华中国科学院长春应用化学研究所

镧系离子的4f轨道在空间上被5s~25p~6轨道所屏蔽,因此不太被配位场所影响,所以以前认为稀土化合物是属离子型化合物.但大量事实表明.屏蔽并不是完全的,配位场的作用仍不可忽略,有一些镧系化合物并不是纯离子型的,而是有一定程度的共价性... 详细信息

镧系离子的4f轨道在空间上被5s~25p~6轨道所屏蔽,因此不太被配位场所影响,所以以前认为稀土化合物是属离子型化合物.但大量事实表明.屏蔽并不是完全的,配位场的作用仍不可忽略,有一些镧系化合物并不是纯离子型的,而是有一定程度的共价性.这可从它们的f-f跃迁的光谱谱线在配位场的作用下发生位移而得到证明.在配位场的作用下,4f轨道仍有一点伸展扩大,与5d轨道混合而参与成键,从而有一定程度的共价性.由于这种电子云的扩大效应(nephelauxetic effect),使电子间的互斥减小,从而减少了多重项之间的间距,使谱线发生向长波的位移(红移).因此,可根据谱线的红移作为镧系离子与配位体之间的共价程度的测量.由于目前对气态的镧系自由离子的吸收光谱还没有做过很多工作,缺乏数据,因此,目前只能相对于镧系的水合离子来测定镧系化合物的相对谱线位移.

关键词：共价共价性谱线位移红移超灵敏跃迁 Nd 程度

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

裘昌林治疗急性脊髓炎经验

中华中医药杂志 2019年第7期34卷 3091-3094页

作者：卢裕强裘辉裘昌林浙江省立同德医院杭州310000 浙江中医药大学附属第三医院杭州310009 浙江中医药大学附属第一医院杭州310000

急性脊髓炎是神经科常见重症,归属于中医'痿证''痿蹙''癃闭''遗尿'等范畴,其截瘫、二便失禁等后遗症严重损害患者的生活质量。裘昌林教授长期从事中西医结合神经科工作,临床经验丰富,对急性脊髓炎的治疗有其独到之处。文章主要从临床角... 详细信息

急性脊髓炎是神经科常见重症,归属于中医'痿证''痿蹙''癃闭''遗尿'等范畴,其截瘫、二便失禁等后遗症严重损害患者的生活质量。裘昌林教授长期从事中西医结合神经科工作,临床经验丰富,对急性脊髓炎的治疗有其独到之处。文章主要从临床角度出发,介绍了裘教授对急性脊髓炎的分阶段辨证施治思路。同时文章也介绍了裘教授马钱子小剂量渐加量法这一独特用药技巧,重用牛膝及虫类药的用药特色,以及改善患者直肠膀胱功能障碍的用药经验。

关键词：急性脊髓炎辨证思路用药特色裘昌林马钱子牛膝虫类药

Hepatic venous outflow reconstruction in adult right lobe living donor liver transplantation without middle hepatic vein

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2007年第11期120卷 947-951页

作者： WU Hong YANG Jia-yin YAN Lü-nan LI Bo ZENG Yong WEN Tian-fu ZHAO Ji-chun WANG Wen-tao XU Ming-qing lu qiang CHEN Zhe-yu MA yu-kui LI Jin Center of Liver Transplantation West China Hospital Sichuan University Chengdu 610041 China

Background It is difficult and challenging to reconstruct hepatic venous outflow in adult right lobe living donor liver transplantation （LDLT） without the middle hepatic vein （MHV）. Excessive perfusion of the portal vein and venous outflow obstruction will lead to acute congestion of the graft, ultimately resulting in primary nonfunction. Although various reconstruction patterns have been explored in many countries, there is currently no clear consensus. In this study we describe a technique to prevent ＂chocking＂ of the graft at the outflow anastomosis with the inferior vena cava （IVC） in LDLT using right lobe graft without the MHV. Methods A retrospective analysis was conducted on clinical data from 55 recipients undergoing LDLT using right lobe grafts without the MHV or reconstruction of hepatic venous outflow. The donor＇s right hepatic vein （RHV） was anastomosed with a triangular opening of the recipient IVC; the inferior right hepatic vein （IRHV）, if large enough, was anastomosed directly to the IVC. The great saphenous vein （GSV） was used for reconstruction of significant MHV tributaries. Results No deaths occurred in any of the donors. Of the 55 recipients, complications occurred in 6, including hepatic vein stricture （1 case）, small-for-size syndrome （1）, hepatic artery thrombosis （1）, intestinal bleeding （1）, bile leakage （1）, left subphrenic abscess and pulmonary infection （1）. A total of three patients died, one from small-for-size syndrome and two from multiple system organ failure. Conclusions The multiple-opening vertical anastomosis was reconstructed with hepatic vein outflow. This technique alleviates surgical risk of living donors, ensures excellent venous drainage, and prevents vascular thromboses and primary nonfunction.

关键词： living donor liver transplantation right lobe graft living donors

在线全文

学校读者我要写书评

暂无评论

裘昌林治疗三叉神经痛常用药对采撷

中华中医药杂志 2016年第2期31卷 527-529页

作者：卢裕强裘涛裘昌林浙江中医药大学杭州310053 浙江中医药大学附属第一医院杭州310006

文章从中药药对的角度出发,整理和分析裘昌林教授治疗三叉神经痛的中医特色,总结探析了裘昌林教授治疗三叉神经痛的用药特色。裘昌林教授善于运用白芷与白芍、升麻与苍术、细辛与石膏、僵蚕与地龙、海风藤与鸡血藤、豨莶草与白毛藤等药... 详细信息

文章从中药药对的角度出发,整理和分析裘昌林教授治疗三叉神经痛的中医特色,总结探析了裘昌林教授治疗三叉神经痛的用药特色。裘昌林教授善于运用白芷与白芍、升麻与苍术、细辛与石膏、僵蚕与地龙、海风藤与鸡血藤、豨莶草与白毛藤等药对,来针对三叉神经痛的临床特点进行治疗。通过中医辨证论治及运用药对的特色配伍,取得了较好的疗效,为三叉神经痛的临床治疗提供了参考。

关键词：三叉神经痛药对用药经验裘昌林

在线全文

学校读者我要写书评

暂无评论

变电运维误操作事故的预防和控制措施

通信电源技术 2019年第2期36卷 261-262页

作者：陆郁强国网江苏省电力有限公司宜兴市供电分公司江苏宜兴214200

目前,少数变电站日常管理制度和实际工作情况不符,由于上级不能到偏远的变电站进行管理,因此日常工作没有按照制度操作。制度只是一种形式,不能在具体操作中发挥作用,导致变电运行管理混乱,经常发生一些小故障,虽然没有酿成大事故,但是... 详细信息

目前,少数变电站日常管理制度和实际工作情况不符,由于上级不能到偏远的变电站进行管理,因此日常工作没有按照制度操作。制度只是一种形式,不能在具体操作中发挥作用,导致变电运行管理混乱,经常发生一些小故障,虽然没有酿成大事故,但是也要引起站长人员的注意,及时完善制度,按照制度落实工作,保证规范化管理,降低故障的发生率。鉴于此,分析了变电运行中电气误操作事故的原因,并提出了一些防范建议和措施,以供同行业工作人员参考。

关键词：变电运行误操作防范措施

Advances in the Development of Gradient Scaffolds Made of Nano‑Micromaterials for Musculoskeletal Tissue Regeneration

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第3期17卷 455-500页

作者： Lei Fang Xiaoqi Lin Ruian Xu lu Liu yu Zhang Feng Tian Jiao Jiao Li Jiajia Xue Beijing Laboratory of Biomedical Materials Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China School of Biomedical Engineering Faculty of Engineering and ITUniversity of Technology SydneySydneyNSW 2007Australia

The intricate hierarchical structure of musculoskeletal tissues,including bone and interface tissues,necessitates the use of complex scaffold designs and material structures to serve as tissue-engineered *** has led to growing interest in the development of gradient bone scaffolds with hierarchical structures mimicking the extracellular matrix of native tissues to achieve improved therapeutic *** on the anatomical characteristics of bone and interfacial tissues,this review provides a summary of current strategies used to design and fabricate biomimetic gradient scaffolds for repairing musculoskeletal tissues,specifically focusing on methods used to construct compositional and structural gradients within the *** latest applications of gradient scaffolds for the regeneration of bone,osteochondral,and tendon-to-bone interfaces are ***,the current progress of testing gradient scaffolds in physiologically relevant animal models of skeletal repair is discussed,as well as the challenges and prospects of moving these scaffolds into clinical application for treating musculoskeletal injuries.

关键词： Gradient scaffolds Musculoskeletal tissues Advanced manufacturing Biomaterials Tissue regeneration