检索结果-南通市图书馆

Advances in Polar science 2024年

作者： sergio sOTO ACU?A alexander O.VARGAs Jonatan KALUZA Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Red Paleontológica U-Chile，Departamento de Biología， Facultad de Ciencias， Universidad de Chile Fundación de Historia Natural Félix de Azara， Universidad Maimónides Escuela de Geología，Facultad de Ciencias， Ingeniería y Tecnología， Universidad Mayor， Providencia

The first dinosaur discovered in the Antarctic continent was the ankylosaur Antarctopelta oliveroi in the 1980s. Nevertheless， since then several hypotheses of phylogenetical relationships have been proposed because these have been depended on how the skeletal remains have been interpreted. The main obstacle for clarifying its phylogenetic position is that many portions of the skeleton remain unknown， in addition to the presence of unknown characters in typical ankylosaurs. Considered an ankylosaurid， nodosaurid， or even a chimaera， a recent proposal based on mostly complete material of a new ankylosaur from Chilean Patagonia provided support for a novel phylogenetic hypothesis: Antarctopelta and other southern ankylosaurs are an early branching clade， the Parankylosauria， whose origin probably dates to the Late Jurassic. In the light of this new view， a redescription of the available skeletal remains is provided together with a new reconstruction of the first Antarctic dinosaur known to the science community.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

What slowdown?

ChinAfrica 2024年第7期16卷 44-45页

作者： alexander AYERTEY ODONKOR 不详

China remains a key source of growth and profits for many multinationals In March,Apple opened its largest retail store on the Chinese mainland in shanghai-the company’s second-largest flagship store after its Fifth Avenue outlet in New *** new addition brings Apple’s store tally in shanghai and the Chinese market to eight and 57,respectively,a significant milestone for the company,which opened its first store in China in 2008.

关键词： store retail Avenue

Why the‘Next China’Is still China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Beijing Review 2024年第20期67卷 24-25页

作者： alexander Ayertey Odonkor 不详

In March,Apple opened its largest retail store on the Chinese mainland in shanghai-the company's second largest flagship store after its Fifth Avenue outlet in New York City,the *** new addition brings Apple's store tally in shanghai and the Chinese market to eight and 57,respectively-a significant milestone for the company,which opened its first store in China in 2008.

关键词： store retail Avenue

Correction method for moderate and severe degrees of hallux valgus associated with transfer metatarsalgia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Orthopedics 2024年第3期15卷 238-246页

作者： Amangasy Zhanaspayev Nurlan Bokembayev Marat Zhanaspayev Aidos Tlemissov sabina Aubakirova alexander Prokazyuk Department of Traumatology and Orthopaedics The National Scientific Center of Traumatology and Orthopaedics Named after Academician Batpenov NDAstana 010000Kazakhstan Department of Traumatology and Paediatric surgery Non-Commercial Joint-Stock Company“Semey Medical University”Semey 071400Kazakhstan Department of Habilitation and Rehabilitation Center of Habilitation and Rehabilitation of Persons with Disabilities of the Abai RegionSemey 071400Kazakhstan Department of Anaesthesiology and Resuscitation Center of Nuclear Medicine and OncologySemey 071400Kazakhstan

BACKGROUND Hallux valgus(HV)is a common foot deformity that manifests with increasing age,especially in *** associated foot pain causes impaired gait and decreases quality of *** and severe HV is a deformity that is charac-terized by the involvement of lesser rays and requires complex surgical *** this study,we attempted to develop a procedure for this *** To analyse the treatment results of patients who underwent simultaneous surgical correction of all parts of a static forefoot *** We conducted a prospective clinical trial between 2016 and 2021 in which 30 feet with moderate or severe HV associated with Tailor’s bunion and metatarsalgia were surgically treated via a new method involving surgical correction of all associated *** method included a modified Lapidus procedure,M2M3 tarsometatarsal arthrodesis,intermetatarsal fusion of the M4 and M5 bases,and the use of an original external fixation apparatus to enhance correction ***,postoperative,and final follow-up radiographic data and American Orthopaedic Foot and Ankle society(AOFAs)scores were compared,and P valuessidered to indicate statistical *** The study included 28 females(93.3%)and 2 males feet(6.7%),20(66.7%)of whom had a moderate degree of HV and 10(33.3%)of whom had severe deformity.M2 and M3 metatarsalgia was observed in 21 feet,and 9 feet experienced pain only at *** mean follow-up duration was 11 *** patients had good correction of the HV angle[preoperative median,36.5 degrees,interquartile range(IQR):30-45;postoperative median,10 degrees,IQR:8.8-10;follow-up median,11.5 degrees,IQR:10-14;Psalgia was resolved in most patients(30 vs 5).There was a clinically negligible decrease in the corrected angles at the final follow-up,and the overall AOFAs score was significantly better(median,65 points,IQR:53.8-70;vs 80 points,IQR:75-85;PsION The developed me

关键词： Hallux valgus Metatarsalgia Tailor’s bunion Lapidus procedure Proximal metatarsal osteotomy splayfoot

Determination of Thermal Properties of Unsmooth si Nanowires

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1期41卷 51-56页

作者：刘世贤 alexander A.Barinov 訚菲 Vladimir I.Khvesyuk Department of Thermophysics Bauman Moscow State Technical UniversityMoscow 105005Russian Federation

We estimate the thermal properties of unsmooth si nanowires,considering key factors such as size(diameter),surface texture(roughness)and quantum size effects(phonon states)at different *** nanowires with a diameter of less than 20 nm,we highlight the importance of quantum size effects in heat capacity calculations,using dispersion relations derived from the modified frequency equation for the elasticity of a *** thermal conductivities of nanowires with diameters of 37,56,and 115nm are predicted using the Fuchs–sondheimer model and soffer’s specular ***,the roughness parameters are chosen to reflect the technological characteristics of the real *** findings reveal that surface texture plays a significant role in thermal conductivity,particularly in the realm of ballistic heat transfer within *** study provides practical recommendations for developing new thermal management materials.

关键词： nanowires roughness size

Deformation,structure and potential hazard of a landslide based on InsAR in Banbar county,Xizang(Tibet)

在线全文

学校读者我要写书评

暂无评论

China Geology 2024年第2期7卷 203-221页

作者： Guan-hua Zhao Heng-xing Lan Hui-yong Yin Lang-ping Li alexander strom Wei-feng sun Chao-yang Tian College of Earth science and Engineering Shandong University of Science and TechnologyQingdao 266590China state Key Laboratory of Resources and Environmental Information system Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China school of Geological Engineering and Geomatics Chang’an UniversityXi’an 710054China Key Laboratory of Ecological Geology and Disaster Prevention Ministry of Natural ResourcesXi’an 710054China University of Chinese Academy of sciences Beijing 100049China JsC“Hydroproject Institute” Moscow 125993Russia

The Tibetan Plateau is characterized by complex geological conditions and a relatively fragile ecological *** recent years,there has been continuous development and increased human activity in the Tibetan Plateau region,leading to a rising risk of *** landslide in Banbar County,Xizang(Tibet),have been perturbed by ongoing disturbances from human engineering activities,making it susceptible to instability and displaying distinct *** this study,small baseline subset synthetic aperture radar interferometry(sBAs-InsAR)technology is used to obtain the Line of sight(LOs)deformation velocity field in the study area,and then the slope-orientation deformation field of the landslide is obtained according to the spatial geometric relationship between the satellite’s LOs direction and the ***,the landslide thickness is inverted by applying the mass conservation *** results show that the movement area of the landslide is about 6.57×10^(4)m^(2),and the landslide volume is about 1.45×10^(6)m^(3).The maximum estimated thickness and average thickness of the landslide are 39 m and 22 m,*** thickness estimation results align with the findings from on-site investigation,indicating the applicability of this method to large-scale earth *** deformation rate of the landslide exhibits a notable correlation with temperature variations,with rainfall playing a supportive role in the deformation process and displaying a certain *** activities exert the most substantial influence on the spatial heterogeneity of landslide deformation,leading to the direct impact of several prominent deformation areas due to human ***,utilizing the long short-term memory(LsTM)model to predict landslide displacement,and the forecast results demonstrate the effectiveness of the LsTM model in predicting landslides that are in a continuous development and movement *** landslide is still active,and based

关键词： Landslide InsAR Human activity Deformation structure LsTM model Engineering construction Thickness Neural network Machine learning Prediction and prevention Tibetan Plateau Geological hazards survey engineering

Interstitial Doping of snO_(2) Film with Li for Indium-Free Transparent Conductor

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2024年第3期41卷 140-145页

作者：陈兴谦李昊臻陈伟梅增霞 alexander Azarov Andrej Kuznetsov 杜小龙 Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China songshan Lake Materials Laboratory Dongguan 523808China Department of Physics Centre for Materials Science and NanotechnologyUniversity of OsloP.O.Box 1048BlindernN-0316 OsloNorway Guangdong sinoPrime Technology Co. Ltd.Dongguan 523808China school of Physical sciences University of Chinese Academy of SciencesBeijing 100049China

snO_(2)films exhibit significant potential as cost-effective and high electron mobility substitutes for In_(2)O_(3)*** this study,Li is incorporated into the interstitial site of the snO_(2)lattice resulting in an exceptionally low resistivity of 2.028×10^(-3)Ω·cm along with a high carrier concentration of 1.398×10^(20)cm^(-3)and carrier mobility of 22.02 cm^(2)/V·s.

关键词： exceptional resistivity substitute

Improved training framework in a neural network model for disruption prediction and its application on EXL-50

在线全文

学校读者我要写书评

暂无评论

Plasma science and Technology 2024年第5期26卷 29-39页

作者：蔡剑青梁云峰 alexander KNIEPs 齐东凯王二辉向皓明廖亮黄杰阳杰黄佳刘建文 Philipp DREWs 徐帅顾翔高轶琛罗宇李直 the EXL-50 Team Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China Forschungszentrum Jülich GmbH Institut für Energie-und Klimaforschung-PlasmaphysikPartner of the Trilateral Cluster(TEC)Jülich 52425Germany ENN science and Technology Development Co. LtdLangfang 065001People’s Republic of China

A neural network model with a classical annotation method has been used on the EXL-50tokamak to predict impending ***,the results revealed issues of overfitting and overconfidence in predictions caused by inaccurate *** mitigate these issues,an improved training framework has been *** this approach,soft labels from previous training serve as teachers to supervise the further learning process;this has lead to a significant improvement in predictive model ***,this enhancement is primarily attributed to the coupling effect of the soft labels and correction *** improved training framework introduces an instance-specific label smoothing method,which reflects a more nuanced model assessment on the likelihood of a *** presents a possible solution to effectively address the challenges associated with accurate labeling across different machines.

关键词： neural network disruption soft label EXL-50 tokamak

Cluster Analysis of the Roma-BZCAT Blazars

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第5期24卷 117-139页

作者： Dmitry O.Kudryavtsev Yulia V.sotnikova Vladislav A.stolyarov Timur V.Mufakharov Valery V.Vlasyuk Margarita L.Khabibullina alexander G.Mikhailov Yulia V.Cherepkova special Astrophysical Observatory of the Russian Academy of sciences Nizhny Arkhyz 369167Russia Astrophysics Group Cavendish LaboratoryUniversity of CambridgeCambridge CB3 OHEUK Kazan Federal University 18 Kremlyovskaya StKazan 420008Russia

Based on the collected multiwavelength data, namely in the radio(NVss, FIRsT, RATAN-600), IR(WIsE),optical(Pan-sTARRs), UV(GALEX), and X-ray(ROsAT, swift-XRT) ranges, we have performed a cluster analysis for the blazars of the Roma-BZCAT catalog. Using two machine learning methods, namely a combination of PCA with k-means clustering and Kohonen's self-organizing maps(sOMs), we have constructed an independent classification of the blazars(five classes) and compared the classes with the known Roma-BZCAT classification(FsRQs, BL Lacs, galaxy-dominated BL Lacs, and blazars of an uncertain type) as well as with the high synchrotron peaked(HsP) blazars from the 3HsP catalog and blazars from the TeVCat catalog. The obtained groups demonstrate concordance with the BL Lac/FsRQ classification along with a continuous character of the change in the properties. The group of HsP blazars stands out against the overall distribution. We examine the characteristics of the five groups and demonstrate distinctions in their spectral energy distribution shapes. The effectiveness of the clustering technique for objective analysis of multiparametric arrays of experimental data is demonstrated.

关键词： methods data analysis-galaxies active-(galaxies:)BL Lacertae objects general

Nonlinear Rydberg exciton-polaritons in Cu2O microcavities

在线全文

学校读者我要写书评

暂无评论

Light(science & Applications) 2024年第4期13卷 619-627页

作者： Maxim Makhonin Anthonin Delphan Kok Wee song Paul Walker Tommi Isoniemi Peter Claronino Konstantinos Orfanakis sai Kiran Rajendran Hamid Ohadi Julian Heckötter Marc Assmann Manfred Bayer alexander Tartakovskii Maurice skolnick Oleksandr Kyriienko Dmitry Krizhanovskii Department of Physics and Astronomy University of SheffieldSheffield S37RHUK. Department of Physics and Astronomy University of ExeterStocker RoadExeter EX44PYUK. sUPA School of Physics and AstronomyUniversity of St AndrewsSt Andrews KY169SSUK. Fakultät Physik TU DortmundAugust-Schmidt-Straße 444227 DortmundGermany

Rydberg excitons(analogues of Rydberg atoms in condensed matter systems)are highly excited bound electron-hole states with large Bohr *** interaction between them as well as exciton coupling to light may lead to strong optical nonlinearity,with applications in sensing and quantum information ***,we achieve strong effective photon–photon interactions(Kerr-like optical nonlinearity)via the Rydberg blockade phenomenon and the hybridisation of excitons and photons forming polaritons in a Cu2O-filled *** pulsed resonant excitation polariton resonance frequencies are renormalised due to the reduction of the photon-exciton coupling with increasing exciton *** analysis shows that the Rydberg blockade plays a major role in the experimentally observed scaling of the polariton nonlinearity coefficient as∝n4.4±1.8 for principal quantum numbers up to n=*** high principal quantum numbers studied in a polariton system for the first time are essential for realisation of high Rydberg optical nonlinearities,which paves the way towards quantum optical applications and fundamental studies of strongly correlated photonic(polaritonic)states in a solid state system.

关键词： density Rydberg polar