检索结果-南通市图书馆

Stabilizing surface chemistry and texture of single-crystal Ni-rich cathodes for Li-ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第30期125卷 192-197页

作者： Zhaofeng Yang Ling Chen Huawei Zhu Yihua Zhu Hao Jiang Chunzhong Li Shanghai engineering research center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

The single-crystalline Ni-rich cathodes are believed to help improve the safety of Li-ion batteries(LIBs),however,the ion-diffusion limits their high-rate performance owing to large single-crystal ***,a dual-modification strategy of surface Li_(2)TiO_(3)-coating and bulk Ti-doping has been performed to achieve high-rate single crystal LiNi_(0.83)Co_(0.12)Mn_(0.05)O_(2)(NCM)*** Li-ion conductive Li_(2)TiO_(3) coating layer facilitates the Li-ion transfer and prevents the electrolyte ***,the robust Ti-O bonds stabilize the cubic close-packed oxygen framework and mitigate the Li/Ni *** synergy endows the dual-modified NCM with enhanced de-/lithiation reaction kinetics and stable surface chemistry.A high specific capacity of 128 mAh g^(-1) is delivered even at 10 C with an extended cycle *** finding is reckoned to pave the way for developing high energy density LIBs for long-range electric vehicles.

关键词： NCM811 Single-crystal Dual-modification Specific capacity Li-ion batteries

Light-responsive color switching of self-doped TiO_(2-x)/WO_(3)·0.33H_(2)O hetero-nanoparticles for highly efficient rewritable paper

在线全文

学校读者我要写书评

暂无评论

Nano research 2021年第1期14卷 165-171页

作者： Jingmei Zhao Luntao Liu Yun Zhang Zhenyu Feng Feifei Zhao Wenshou Wang national engineering research center for Colloidal Materials and School of Chemistry and Chemical engineering Shandong UniversityJinan 250100China

Smart materials that reversibly change color upon light illumination are widely explored for diverse appealing ***,light-responsive color switching materials are mainly limited to organic *** synthesis of inorganic counterparts has remained a significant challenge because of their slow light response and poor ***,we report a seeded growth strategy for the synthesis of TiO_(2-x)/WO_(3)·0.33H_(2)Ohetero-nanoparticles(HNPs)with networked wire-like structure of〜10 nm in diameters that enable the highly reversible light-responsive color switching *** the TiO_(2-x)/WO_(3)·0.33H_(2)OHNPs,T P species self-doped in TiO_(2-x)nanoparticles(NPs)act as efficient sacrificial electron donors(SEDs)and Ti-O-W linkages formed between TiO2-x and WO30.33H2O NPs ensure the nanoscale interfacial contact,endowing the HNPs enhanced photoreductive activity and efficient interfacial charge transfer upon ultraviolet(UV)illumination to achieve highly efficient color *** TiO_(2-x)/WO_(3)·0.33H_(2)OHNPs exhibits rapid light response(180 times).We further demonstrate the applications of TiO_(2-x)/WO_(3)·0.33H_(2)O HNPs in ink-free,light-printable rewritable paper that can be written on freehand or printed on through a photomask using UV *** work opens an avenue for designing inorganic light-responsive color switching nanomaterials and their smart applications.

关键词： light-response color switching self-doping hetero-nanoparticles rewritable paper

The Multiple Modification Road of Li-Rich Manganese-Based Cathode Materials

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 Journal of Structural Chemistry 2022年第9期41卷 45-55页

作者： Yuming Liu Jingyi Li Feixiang Wu Yunjao Li Junchao Zheng Zhenjiang He Schoolof Metallurgy and Environment Central South UniversityChangsha 410083China national engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals Central South UniversityChangsha 410083China engineering research center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083China

Li-rich manganese-based cathode materials(LR) are considered as excellent cathode materials for a new generation of lithium-ion batteries causes their outstanding electrochemical performance, friendly price, and environmental friendliness. But defects such as rapid voltage decay and loss of lattice oxygen limit their applications. The electrochemical performance of LR has to be improved by means of modification. The previous single modification methods like element doping, surface coating, structure design, etc. can only optimize the electrochemical performance of LR from one aspect. Recently, multiple modifications,which can combine the advantages of multiple modifications, have been favored by researchers. Here, we comprehensively review the recent progress of multiple modification of LR based on the combination of different modification means. The review and summary of the multiple modification of LR will play a guiding role in its development in the future.

关键词： lithium-ion batteries Li-rich manganese-based high energy density multiple modification

Dendrocalamus latiflorus and its component rutin exhibit glucose-lowering activities by inhibiting hepatic glucose production via AKT activation

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2022年第5期12卷 2239-2251页

作者： Kun Luo Wenting Huang Liansheng Qiao Xiaoling Zhang Di Yan Zhiyu Ning Chengmei Ma Honglei Dang Dong Wang Hongyan Guo Lan Xie Jing Cheng State Key Laboratory of Membrane Biology School of MedicineTsinghua UniversityBeijing 100084China Medical Systems Biology research center School of MedicineTsinghua UniversityBeijing 100084China national engineering research center for Beijing Biochip Technology Beijing 102206China School of Basic Medical Sciences Chengdu University of Traditional Chinese MedicineChengdu 611137China

The potential medicinal value of Ma bamboo(Dendrocalamus latiflorus), one of the most popular and economically important bamboo species in China, has been underestimated. In the present study, we found that D. latiflorus leaf extract(DLE) reduced fasting blood glucose levels, body weight,and low-density lipoprotein cholesterol with low liver toxicity in db/db mice. In addition, gene expression profiling was performed and pathway enrichment analysis showed that DLE affected metabolic ***, DLE activated the AKT signaling pathway and reduced glucose production by downregulating glucose-6-phosphatase(G6 PC) and phosphoenolpyruvate carboxykinase 1(PCK1) expression. Moreover, network pharmacology analysis identified rutin as an active component in DLE through targeting insulin growth factor 1 receptor(IGF1 R), an upstream signaling transducer of AKT. Due to its hypoglycemic effects and low toxicity, DLE may be considered an adjuvant treatment option for type 2 diabetes patients.

关键词： Dendrocalamus latiflorus leaf extract Type 2 diabetes mellitus FOXO1 AKT Rutin IGF1R Gene expression profiling Network pharmacology

In Situ Electron Backscatter Diff raction Analysis for Microstructure Evolution and Deformation Models of Mg–Ce Alloy During Uniaxial Loading

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2019年第2期32卷 263-268页

作者： Fang-Wei Jiao Li Jin Jie Dong Feng-Hua Wang national engineering research center of Light Alloys Net Forming School of Material Sciences and Engineering Shanghai Jiaotong University

Previous studies showed that signifi cant increases in elongation in Mg–Ce alloys due to the Ce addition and the solute drag eff ect by Ce addition were ascribed to the non-basal dislocation slip activating and the texture altering. The microstructure evolution and deformation models of extruded Mg-0.5 wt%Ce alloy rods under uniaxial tension have been studied using in situ electron backscatter diff raction. The basal and non-basal slips were characterized by using slip line trace analysis. The results provide evidence for that pyramidal slip activated during deformation, besides basal slip and extension twinning, which contributes to the texture weakening and ductility increasing in Mg-0.5 wt%Ce alloy.

关键词： Texture Non-basal slip Twinning In situ electron backscattered diff raction(EBSD) Trace analysis

Visualization for Explanation of Deep Learning-Based Defect Detection Model Using Class Activation Map

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第6期75卷 4753-4766页

作者： Hyunkyu Shin Yonghan Ahn Mihwa Song Heungbae Gil Jungsik Choi Sanghyo Lee center for AI Technology in Construction Hanyang University ERICAAnsan15588Korea School of Architecture and Architectural engineering Hanyang University ERICAAnsan15588Korea ICT Convergence research Division Korea Expressway Corporation Research InstituteHwaseong18489Korea Department of Architecture College of EngineeringKangwon National UniversitySamcheok25913Korea Division of Smart Convergence engineering Hanyang University ERICAAnsan15588Korea

Recently,convolutional neural network(CNN)-based visual inspec-tion has been developed to detect defects on building surfaces *** CNN model demonstrates remarkable accuracy in image data analysis;however,the predicted results have uncertainty in providing accurate informa-tion to users because of the“black box”problem in the deep learning ***,this study proposes a visual explanation method to overcome the uncertainty limitation of CNN-based defect *** visual repre-sentative gradient-weights class activation mapping(Grad-CAM)method is adopted to provide visually explainable information.A visualizing evaluation index is proposed to quantitatively analyze visual representations;this index reflects a rough estimate of the concordance rate between the visualized heat map and intended *** addition,an ablation study,adopting three-branch combinations with the VGG16,is implemented to identify perfor-mance variations by visualizing predicted *** reveal that the proposed model,combined with hybrid pooling,batch normalization,and multi-attention modules,achieves the best performance with an accuracy of 97.77%,corresponding to an improvement of 2.49%compared with the baseline ***,this study demonstrates that reliable results from an automatic defect classification model can be provided to an inspector through the visual representation of the predicted results using CNN models.

关键词： Defect detection visualization class activation map deep learning explanation visualizing evaluation index

Comparison of DUS testing and SNP fingerprinting for variety identification in cucumber

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

Horticultural Plant Journal 2022年第5期8卷 575-582页

作者： Jian Zhang Jingjing Yang Shenzao Fu Jun Ren XiaoFei Zhang Changxuan Xia Hong Zhao Kun Yang Changlong Wen Beijing Vegetable research center(BVRC) Beijing Academy of Agricultural and Forestry SciencesNational Engineering Research Center for VegetablesBeijing 100097China Beijing Key Laboratory of Vegetable Germplasms Improvement Beijing 100097China Institute of Vegetables and Flowers Chinese Academy of Agricultural SciencesBeijing 100081China State Key Laboratory of Vegetable Germplasm Innovation Tianjin 300192China

Variety identification plays an important role in protecting the intellectual property of varieties,ensuring seed quality,and encouraging breeding ***,morphological evaluation in the field,such as distinctness,uniformity,and stability(DUS)testing,and DNA fingerprinting in the laboratory using molecular markers are two dominant methods used for variety *** studies have compared the results of these approaches,and the relationship between the two methods is *** this study,134 dominant cucumber varieties were evaluated using 50 DUS testing traits and genotyped by 40 single nucleotide polymorphisms(SNPs).The 40 SNPs were developed in our previous study and arewell suited for variety *** the DUS testing,significant positive or negative correlations among 50 DUS traits were observed,and 20 core traits,including 15 fruit traits,were further selected to increase field inspection *** suggested that fruit shape plays an important role in variety *** ratio of fruit length/diameter was themost important trait,explaining 9.2%of the phenotypic *** the DNA fingerprinting test,the 40 SNPs were highly polymorphic and could distinguish all of the 134 cucumber varieties,and 14 core SNPs were selected to improve the identification ***,the population structure analysis of 134 cucumber varieties by phenotypic data in the DUS test was in accordance with the genotypic data from the DNA fingerprinting,indicating that all varieties could be divided into the same four subgroups:European type,North China type,South China type,and hybrids of the North China and South China ***,linear correlativity of distinguishment for each pair of varieties was observed between the DUS test and the DNA *** results indicated that these two methods have good application in future research,especially for the scaled-up analysis of hundreds of varieties.

关键词： Cucumber DUS test SNP fingerprinting Variety identification

Corrosion characteristics of single-phase Mg-3Zn alloy thin film for biodegradable electronics

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第9期11卷 3241-3254页

作者： Ji-Woo Gu Jae-Young Bae Guangzhe Li Hae Won Hwang So-Hyeon Lee Sung-Geun Choi Ju-Young Kim Myoung-Ryul Ok Yu-Chan Kim Seung-Kyun Kang Department of Materials Science and engineering Seoul National University(SNU)Seoul 08826Republic of Korea research Institute of Advanced Materials(RIAM) Seoul National UniversitySeoul 08826Republic of Korea Soft Foundry Nano Systems Institute(NSI) Seoul National UniversitySeoul 08826Republic of Korea Biomaterials research center Biomedical Research DivisionKorea Institute of Science and Technology(KIST)Seoul 34141Republic of Korea Division of Bio-Medical Science and Technology KIST SchoolKorea University of Science and TechnologySeoul 02792Republic of Korea Department of Materials Science and engineering Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea

Biodegradable metals as electrodes, interconnectors, and device conductors are essential components in the emergence of transient electronics, either for passive implants or active electronic devices, especially in the fields of biomedical electronics. Magnesium and its alloys are strong candidates for biodegradable and implantable conducting materials because of their high conductivity and biocompatibility, in addition to their well-understood dissolution behavior. One critical drawback of Mg and its alloys is their considerably high dissolution rates originating from their low anodic potential, which disturbs the compatibility to biomedical applications. Herein, we introduce a single-phase thin film of a Mg-Zn binary alloy formed by sputtering, which enhances the corrosion resistance of the device electrode, and verify its applicability in biodegradable electronics. The formation of a homogeneous solid solution of single-phase Mg-3Zn was confirmed through X-ray diffraction and transmission electron microscopy. In addition, the dissolution behavior and chemistry was also investigated in various biological fluids by considering the effect of different ion species. Micro-tensile tests showed that the Mg-3Zn alloy electrode exhibited an enhanced yield strain and elongation in relation to a pure Mg electrode. Cell viability test revealed the high biocompatibility rate of the Mg-3Zn binary alloy thin film. Finally, the fabrication of a wireless heater demonstrated the integrability of biodegradable electrodes and highlighted the ability to prolong the lifecycle of thermotherapy-relevant electronics by enhancing the dissolution resistance of the Mg alloy.

关键词： Biodegradable alloy Mg-3Zn binary alloy Solid-solution thin film electrode Biodegradable conductor Transient electronics

Borana rangeland of southern Ethiopia:Estimating biomass production and carrying capacity using field and remote sensing data

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2022年第6期44卷 598-606页

作者： Yeneayehu Fenetahun You Yuan Xin-Wen Xu Yong-Dong Wang national engineering Technology research center for Desert-Oasis Ecological Construction Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences818 South Beijing RoadUrumqi 830011XinjiangChina University of Chinese Academy of Sciences Beijing100049China

Assessing rangeland productivity is critical to reduce ecological degradation and promote sustainable livestock ***,we estimated biomass productivity and carrying capacity dynamics in the Borana rangeland of southern Ethiopia by using field-based data and remote sensing data(i.e.,normalized difference vegetation index(NDVI)).Data was collected from both rainy and dry seasons when biomass production was high and low *** of linear regression showed that both biomass production(R^(2)_(adj)=0.672)and NDVI value(R^(2)_(adj)=0.471)were significantly decreased from 1990 to *** data and NDVI values for mean annual biomass showed a significant linear *** model accuracy in the annual relationship between the observed and predicted biomass values was strong(R^(2)_(adj)=0.986)but with high standard error,indicating that the observed biomass production in the rangeland area was not in good condition as compared with the predicted *** study suggests that,using NDVI data and field-based data in combined way has high potential to estimate rangeland biomass and carrying capacity dynamics at extensively grazed arid and semi-arid *** to use for estimating stoking rates and predicting future management techniques for decision making.

关键词： NDVI Biomass Carrying capacity Rangeland Borana Season