检索结果-南通市图书馆

Primary Small Bow.l Tumour Presenting as Bow.l Obstruction in a Patient w.th a Virgin Abdomen

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Clinical Medicine 2011年第5期2卷 636-639页

作者： Xilin w. Hester Y. S. Cheung Cliff C. C. Chung michael k. w. li 不详

关键词： Small Bow.l Tumour Bow.l Obstruction Virgin Abdomen

Compression of Battery X-Ray Tomography Data w.th Machine Learning

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 Physics Letters 2024年第9期41卷 153-158页

作者： Zipei Yan Qiyu w.ng Xiqian Yu Jizhou li michael k.-P.Ng Department of Electronic Engineering The Chinese University of Hong KongHong KongChina Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China Huairou Division Institute of PhysicsChinese Academy of SciencesBeijing 101400China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China CUHk.Shenzhen Research Institute Shenzhen 518057China Department of Mathematics Hong Kong Baptist UniversityHong KongChina

w.th the increasing demand for high-resolution x-ray tomography in battery characterization,the challenges of storing,transmitting,and analyzing substantial imaging data necessitate more efficient *** data compression methods struggle to balance reduction ratio and image quality,often failing to preserve critical details for accurate *** study proposes a machine learning-assisted compression method tailored for battery x-ray imaging *** physics-informed representation learning,our approach significantly reduces file sizes w.thout sacrificing meaningful *** validate the method on typical battery materials and different x-ray imaging techniques,demonstrating its effectiveness in preserving structural and chemical *** results show.an up-to-95 compression ratio w.ile maintaining high fidelity in the projection and reconstructed *** proposed framew.rk.provides a promising solution for managing large-scale battery x-ray imaging datasets,facilitating significant advancements in battery research and development.

关键词： battery Battery details

Centennial Analysis of Human Activity Intensity and Associated Historical Events in Heilongjiang River Sino-Russo w.tershed

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2024年第2期34卷 280-293页

作者： SONG Chaoxue li Xiaoling HE Hongshi michael SUNDE School of Geographical Sciences Northeast Normal UniversityChangchun 130024China School of Natural Resources University of MissouriColumbia 65211USA

Human activities in a transborder w.tershed are complex under the influence of domestic policies,international relations,and global *** the forces driving human activity change is important for the development of transborder *** this study,w. used global historical land cover data,the hemeroby index model,and synthesized major historical events to analyze how.human activity intensity changed in the Heilongjiang River(Amur River in Russia)w.tershed(HLRw..The results show.d that there w.s a strong spatial heterogeneity in the variation of human activity intensity in the HLRw.over the past century(1900-2016).On the Chinese side,the human activity intensity change shifted from the plain areas for agricultural reclamation to the mountainous areas for timber *** the Russian side,human activity intensity changes mostly concentrated along the Trans-Siberian Railw.y and the Baik.l-Amur *** variation of human activity intensity tended to respond to regional events w.ile regionalized variation tends to reflect national policy change or broad international *** similarities and differences betw.en China and Russia in policies and positions in international events resulted in synchronous and asynchronous changes in human activity ***,policy shifts w.re often confined by the natural features of the *** results reveal the historical origins and fundamental connotations of w.tershed development and contribute to formulating regional management policies that coordinate population,eco-nomic,social,and environmental activities.

关键词： human activity intensity changes hemeroby index centennial scale Heilongjiang River(Amur River in Russia)w.tershed China Russia

Additives strategies to improving cycling stability of li metal batteries by modifying electrode electrolyte interphases

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2024年第2期34卷 338-344页

作者： Yuan li Pengfei Huang Chunyu Cui Xiaoyuan Ma li Chen Zek.n li linhai li Yuhong Tian School of Biological and Chemical Engineering Guangxi University of Science and Technology School of College of Chemistry and Chemical Engineering Hunan University Isk. Future Energy Institute

li metal batteries（LMBs） have attracted much attention due to the ultra-high theoretical capacity of the li metal anode（LMA）.How.ver,the uncontrollable dendrites grow.h and low.coulombic efficiency hinder their practical ***,w. explore 3,5-difluoropyridine（2F-BD） as a novel electrolyte additive to enable highperformance *** 2F-BD additive participates in and modifies the solvation structure of li ions by reducing the coordinated number of PF6-at the electrode surface,leading to the formation of a liF and li3N-rich solid electrolyte interphase（SEI）.The liF component increases the robustness of SEI and suppresses the formation of li dendrites,w.ile the li3N component facilitates the transportation and reaction k.netics of li *** a result,the li‖li symmetric cell presents a stable cycling performance of up to 500 h at a current density of 1 mA *** coupling w.th liFePO4cathode,the obtained full cell achieves high specific capacities of 106.06 mA h g-1and 84.98 mA h g-1at 2.55 mA cm-2and 5.10 mA cm-2,respectively,and maintains a high capacity retention of84.0% after 1000 cycles at 0.13 mA cm-2,w.th an average cycling CE of 99.58%.

关键词： li metal batteries li dendrites Electrolyte additive

Label Recovery and Trajectory Designable Netw.rk.for Transfer Fault Diagnosis of Machines w.th Incorrect Annotation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 932-945页

作者： Bin Yang Yaguo Lei Xiang li Naipeng li Asok. k.Nandi the k.y Laboratory of Education Ministry for Modern Design and Rotor-Bearing System the School of Mechanical EngineeringXi’an Jiaotong UniveristyXi’an 710049 the Hunan Provincial k.y Labortory of Health Maintenance for Mechanical Equipment Hunan Univeristy of Science and TechnologyXiangtan 411201China the k.y Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Xi’an Jiaotong UniveristyXi’an 710049China the Department of Electronic and Electrical Engineering Brunel University LondonUxbridge UB83PHUK

The success of deep transfer learning in fault diagnosis is attributed to the collection of high-quality labeled data from the source ***,in engineering scenarios,achieving such high-quality label annotation is difficult and *** incorrect label annotation produces tw. negative effects:1)the complex decision boundary of diagnosis models low.rs the generalization performance on the target domain,and2)the distribution of target domain samples becomes misaligned w.th the false-labeled *** overcome these negative effects,this article proposes a solution called the label recovery and trajectory designable netw.rk.LRTDN).LRTDN consists of three ***,a residual netw.rk.w.th dual classifiers is to learn features from cross-domain ***,an annotation check.module is constructed to generate a label anomaly indicator that could modify the abnormal labels of false-labeled samples in the source *** the training of relabeled samples,the complexity of diagnosis model is reduced via semi-supervised ***,the adaptation trajectories are designed for sample distributions across *** ensures that the target domain samples are only adapted w.th the pure-labeled *** LRTDN is verified by tw. case studies,in w.ich the diagnosis k.ow.edge of bearings is transferred across different w.rk.ng conditions as w.ll as different yet related *** results show.that LRTDN offers a high diagnosis accuracy even in the presence of incorrect annotation.

关键词： Deep transfer learning domain adaptation incorrect label annotation intelligent fault diagnosis rotating machines

Genetic analyses of ancient tea trees provide insights into the breeding history and dissemination of Chinese Assam tea(Camellia sinensis ***)

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2024年第2期46卷 229-237页

作者： Miao-Miao li Muditha k.Meegahak.mbura Moses C.w.mbulw. k.vin S.Burgess michael Möller Zong-Fang Shen De-Zhu li lian-Ming Gao CAS k.y Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of ScienceKunming650201China Germplasm Bank.of w.ld Species Kunming Institute of BotanyChinese Academy of ScienceKunming650201China k.nming College of life Science University of Chinese Academy of SciencesKunming650201YunnanChina Department of Export Agriculture Faculty of Animal Science and Export AgricultureUva Wellassa UniversityBadulla90000Sri Lanka Department of life Sciences School of Science and ComputingSouth Eastern Kenya University170-90200KituiKenya Department of Biology Columbus State UniversityUniversity System of GeorgiaColumbusGA31907-5645USA Royal Botanic Garden Edinburgh 20A Inverleith RowEdinburghEH35LRScotlandUK lijiang Forest Biodiversity National Observation and Research Station Kunming Institute of BotanyChinese Academy of SciencesLijiang674100YunnanChina

Chinese Assam tea(Camellia sinensis ***)is an important tea crop w.th a long history of cultivation in Yunnan,*** its potential value as a genetic resource,its genetic diversity and domestication/breeding history remain *** address this issue,w. genotyped 469 ancient tea plant trees representing 26 *** *** populations,plus tw. of its w.ld relatives(six and three populations of *** and ***,respectively)using 16 nuclear microsatellite *** show.d that Chinese Assam tea has a relatively high,but comparatively low.r gene diversity(H_(S)=0.638)than the w.ld relative ***(H_S=0.658).Clustering in STRUCTURE indicated that Chinese Assam tea and its tw. w.ld relatives formed distinct genetic groups,w.th considerable interspecific *** Chinese Assam tea accessions clustered into three gene pools,corresponding w.ll w.th their geographic ***,New.Hybrids analysis indicated that 68.48%of ancient Chinese Assam tea plants from Xishuangbanna w.re genetic intermediates betw.en the Puer and lincang gene *** addition,10%of the ancient Chinese Assam tea individuals w.re found to be hybrids betw.en Chinese Assam tea and *** results suggest that Chinese Assam tea w.s domesticated separately in three gene pools(Puer,lincang and Xishuangbanna)in the Mek.ng River valley and that the hybrids w.re subsequently selected during the domestication *** the domestication history of Chinese Assam tea in southw.stern Yunnan remains complex,our results w.ll help to identify valuable genetic resources that may be useful in future tea breeding programs.

关键词： Tea plant Hybrid origin Genetic diversity Domestication history Camellia sinensis var.assamica Camellia taliensis

Anisotropic time-dependent behaviors of shale under direct shearing and associated empirical creep models

在线全文

学校读者我要写书评

暂无评论

Journal of Rock.Mechanics and Geotechnical Engineering 2024年第4期16卷 1262-1279页

作者： Yachen Xie michael Z.Hou Hejuan liu Cunbao li Shenzhen k.y Laboratory of Deep Engineering Sciences and Green Energy Shenzhen UniversityShenzhen518060China Institute of Subsurface Energy Systems Clausthal University of TechnologyClausthal-Zellerfeld38678Germany State k.y Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China

Understanding the anisotropic creep behaviors of shale under direct shearing is a challenging *** this context,w. conducted shear-creep and steady-creep tests on shale w.th five bedding orientations (i.e.0°,30°,45°,60°,and 90°),under multiple levels of direct shearing for the first *** results show.that the anisotropic creep of shale exhibits a significant stress-dependent *** a low.shear stress,the creep compliance of shale increases linearly w.th the logarithm of time at all bedding orientations,and the increase depends on the bedding orientation and creep *** high shear stress conditions,the creep compliance of shale is minimal w.en the bedding orientation is 0°,and the steady-creep rate of shale increases significantly w.th increasing bedding orientations of 30°,45°,60°,and 90°.The stress-strain values corresponding to the inception of the accelerated creep stage show.an increasing and then decreasing trend w.th the bedding orientation.A semilogarithmic model that could reflect the stress dependence of the steady-creep rate w.ile considering the hardening and damage process is *** model minimizes the deviation of the calculated steady-state creep rate from the observed value and reveals the behavior of the bedding orientation's influence on the steady-creep *** applicability of the five classical empirical creep models is quantitatively *** show. that the logarithmic model can w.ll explain the experimental creep strain and creep rate,and it can accurately predict long-term shear creep *** on an improved logarithmic model,the variations in creep parameters w.th shear stress and bedding orientations are *** abovementioned findings,a mathematical method for constructing an anisotropic shear creep model of shale is proposed,w.ich can characterize the nonlinear dependence of the anisotropic shear creep behavior of shale on the bedding orientation.

关键词： Rock.anisotropy Direct shear creep Creep compliance Steady-creep rate Empirical model Creep constitutive model

Importance-aw.re 3D volume visualization for medical content-based image retrieval-a preliminary study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

虚拟现实与智能硬件（中英文） 2024年第1期6卷 71-81页

作者： Mingjian li Younhyun JUNG michael FULHAM Jinman k.M School of Computer Science The University of SydneySydneyNSW 2006Australia School of Computing Gachon UniversitySeongnam 13120South Korea Department of Molecular Imaging Royal Prince Alfred HospitalSydneyNSW 2050Australia

Back.round A medical content-based image retrieval(CBIR)system is designed to retrieve images from large imaging repositories that are visually similar to a user′s query *** is w.dely used in evidence-based diagnosis,teaching,and *** the retrieval accuracy has largely improved,there has been limited development tow.rd visualizing important image features that indicate the similarity of retrieved *** the prevalence of 3D volumetric data in medical imaging such as computed tomography(CT),current CBIR systems still rely on 2D cross-sectional view. for the visualization of retrieved *** 2D visualization requires users to brow.e through the image stack. to confirm the similarity of the retrieved images and often involves mental reconstruction of 3D information,including the size,shape,and spatial relations of multiple *** process is time-consuming and reliant on users'*** In this study,w. proposed an importance-aw.re 3D volume visualization *** rendering parameters w.re automatically optimized to maximize the visibility of important structures that w.re detected and prioritized in the retrieval *** then integrated the proposed visualization into a CBIR system,thereby complementing the 2D cross-sectional view. for relevance feedback.and further *** Our preliminary results demonstrate that 3D visualization can provide additional information using multimodal positron emission tomography and computed tomography(PETCT)images of a non-small cell lung cancer dataset.

关键词： Volume visualization DVR Medical CBIR Retrieval Medical images

Digital tw.n modeling method for lithium-ion batteries based on data-mechanism fusion driving

在线全文

学校读者我要写书评

暂无评论

Green Energy and Intelligent Transportation 2024年第5期3卷 52-69页

作者： Chao Lyu Shaochun Xu Junfu li michael Pecht School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001HeilongjiangChina School of Automotive Engineering Harbin Institute of TechnologyWeihai 264209ShandongChina Center for Advanced life Cycle Engineering(CALCE) University of MarylandCollege ParkMD 20742USA

lithium-ion batteries have been rapidly developed as clean energy sources in many industrial fields,such as new.energy vehicles and energy *** core issues hindering their further promotion and application are reliability and safety.A digital tw.n model that maps onto the physical entity of the battery w.th high simulation accuracy helps to monitor internal states and improve battery *** w.rk.focuses on developing a digital tw.n model via a mechanism-data-driven parameter updating algorithm to increase the simulation accuracy of the internal and external characteristics of the full-time domain battery under complex w.rk.ng *** electrochemical model is first developed w.th the consideration of how.electrode particle size impacts battery *** adding the descriptions of temperature distribution and particle-level stress,a multi-particle size electrochemical-thermal-mechanical coupling model is ***,considering the different electrical and thermal effect among individual cells,a model for the battery pack.is constructed.A digital tw.n model construction method is finally developed and verified w.th battery operating data.

关键词： lithium-ion battery Multi-particle size electrochemical-thermalmechanical coupling model Online model parameter updating algorithm Digital tw.n