检索结果-南通市图书馆

On the Equation n1n2= n3n4 Restricted to Factor Closed Sets

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2018年第10期34卷 1517-1530页

作者： San Ying SHI michel weber School of Mathematics Hefei University of Technology Hefei 230009 P. R. China IRMA UMR 7501 7 rue Rend Descartes 67084 Strasbourg Cedex France

We study the number of solutions N（B,F） of the diophantine equation n1n2 = n3n4,where 1 ≤ n1≤B, 1≤ n3 ≤B, n2, n4 ∈ F and F C [1, B] is a factor closed set. We study more particularly the case when F = {m = p1^... 详细信息

关键词： Diophantine equation arithmetical functions factor closed set

Validity of the French version of Catquest-9SF and use of an electronic notepad for entering patient-reported outcome measures

在线全文

学校读者我要写书评

暂无评论

Eye and Vision 2021年第1期8卷 92-100页

作者： Gregory Katz Alexandra Rouquette François Lignereux Thierry Mourgues michel weber Mats Lundström Chair of Innovation&Value in Health University of Paris School of MedicineParisFrance Value-Based Health Care Consortium ParisFrance Prom-Time ParisFrance Service de SantéPublique et d’Épidémiologie AP-HP Paris-SaclayLe Kremlin-BicêtreFrance Centre de recherche enÉpidémiologie et Santédes Populations InsermUniversitéParis-SaclayVillejuifFrance Ophtalmologie Chénieux Polyclinique de LimogesLimogesFrance Institut Ophtalmologique Sourdille-Atlantique Elsan SantéAtlantiqueNantesFrance Ophthalmology Department Centre Hospitalier-Universitaire de NantesNantesFrance Department of Clinical Sciences OphthalmologyFaculty of MedicineLund UniversityLundSweden

Background:The Catquest-9SF questionnaire is a patient reported outcome measure that quantifies the visual benefits from cataract *** purpose of this study was to translate and adapt the Catquest-9SF questionnaire for France,to assess its psychometric properties via Rasch analysis,and to assess its validity when completed using an electronic ***:The Catquest-9SF questionnaire was translated following the guidelines of the International Society for Pharmacoeconomics and Outcomes ***-9SF and clinical data were collected from patients before and after routine cataract *** questionnaire data were collected via an electronic *** analysis was performed to assess psychometric properties,and sensitivity to change was analysed for patients with complete paired pre-and post-operative ***:A complete filled-in preoperative questionnaire was obtained for 848 *** analysis showed good precision(person separation:2.32,person reliability:0.84),ordered category probability curves,no item misfit,and *** respondents were slightly more able than the level of item difficulty(targeting:−1.12 logits).Sensitivity was analysed on 211 paired questionnaires,and the postoperative questionnaires showed a clear ceiling *** effect size was *** use of an electronic notepad for completing the questionnaire worked out very well after some ***:The French version of Catquest-9SF has good psychometric properties and is suitable for use in French-speaking *** use of the Catquest-9SF questionnaire in an electronic format showed good validity.

关键词： Cataracts Patient-related outcome measures Quality of life Questionnaire Value-based health care Catquest-9SF

Spectroscopic factors of resonance states with the Gamow shell model

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(Physics,Mechanics & Astronomy) 2024年第1期67卷 38-45页

作者： Mengran Xie Jianguo Li Nicolas michel Honghui Li Wei Zuo CAS Key Laboratory of High Precision Nuclear Spectroscopy Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

We provide an investigation of the spectroscopic factor of resonance states in A=5-8 nuclei,utilizing the Gamow shell model(GSM).Within the GSM,the configuration mixing is taken into account exactly with the shell model framework,and the continuum coupling is addressed via the complex-energy Berggren ensemble,which treats bound,resonance,and non-resonant continuum single-particle states on an equal *** a result,both the configuration mixing and continuum coupling are meticulously considered in the *** first calculate the low-lying states of helium isotopes and isotones with the GSM,and the results are compared with that of ab initio no-core shell model(NCSM)*** results indicate that GSM can reproduce the low-lying resonance states more accurately than the *** this,we delve into the spectroscopic factors of the resonance states as computed through both GSM and NCSM,concurrently conducting systematic calculations of overlap functions pertinent to these resonance ***,the calculated overlap function and spectroscopic factor of6He(01+)■νp3/2→^(7)He(3/2_(1)-)with GSM are compared with the results from ab initio NCSM,variational Monte Carlo,and Green’s function Monte Carlo calculations,as well as available experimental *** results assert that wave function asymptotes can only be reproduced in GSM,where resonance and continuum coupling are precisely addressed.

关键词： spectroscopic factor overlap function resonance states continuum coupling isospin symmetry breaking

Demonstrating grating-based phase-contrast imaging of laser-driven shock waves

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第4期9卷 90-97页

作者： Leonard Wegert Stephan Schreiner Constantin Rauch Bruno Albertazzi Paulina Bleuel Eric Frojdh michel Koenig Veronika Ludwig Artem SMartynenko Pascal Meyer Aldo Mozzanica Michael Müller Paul Neumayer Markus Schneider Angelos Triantafyllidis Bernhard Zielbauer Gisela Anton Thilo michel Stefan Funk Plasma Physics Department GSI Helmholtzzentrum fur SchwerionenforschungPlanckstraBe 164291 DarmstadtGermany Erlangen Centre for Astroparticle Physics(ECAP) Friedrich-Alexander-Universität Erlangen-NurnbergNikolaus-Fiebiger-StraBe 291058 ErlangenGermany LULI-CNRS CEASorbonne UniversitésEcole PolytechniqueInstitut Polytechnique de ParisF-91120 Palaiseau CedexFrance Paul Scherrer Institut(Psi) Forschungsstrasse 1115232VilligenSwitzerland Karlsruhe Institute of Technology Institute of Microstructure TechnologyHermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany

Single-shot X-ray phase-contrast imaging is used to take high-resolution images of laser-driven strong shock *** a two-grating Talbot interferometer,we successfully acquire standard absorption,differential phase-contrast,and dark-field images of the shocked *** agreement is demonstrated between experimental data and the results of two-dimensional radiation hydrodynamics simulations of the laser-plasma *** main sources of image noise are identified through a thorough assessment of the interferometer’s *** acquired images demonstrate that grating-based phase-contrast imaging is a powerful diagnostic tool for high-energy-density *** addition,we make a novel attempt at using the dark-field image as a signal modality of Talbot interferometry to identify the microstructure of a foam target.

关键词： interaction. shock phase

堆石混凝土坝概述及下一代混凝土坝施工技术展望

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Engineering 2024年第1期32卷 99-105页

作者： Feng Jin Duruo Huang michel Lino Hu Zhou Department of Hydraulic Engineering Tsinghua UniversityBeijing 100084China ISL Ingénierie International Commission on Large DamsParis 75016France

Over the past few decades,one of the most significant advances in dam construction has been the inven-tion of the rock-filled concrete(RFC)dam,which is constructed by pouring high-performance self-compacting concrete(HSCC)to fill the voids in preplaced large *** innovative use of large rocks in dam construction provides engineers with a material that requires less cement consumption and hydration heat while enhancing construction efficiency and environmental ***,two fundamental scientific issues related to RFC need to be addressed:namely,the pouring compactness and the effect of large rocks on the mechanical and physical properties of *** article provides a timely review of fundamental research and innovations in the design,construction,and quality control of *** for next-generation concrete dams are discussed from the perspectives of envi-ronmental friendliness,intrinsic safety,and labor savings.

关键词： Rock-filled concrete dam Pouring compactness Effect of large rocks Intelligent quality control Unmanned dam construction

Using Optical Tweezers to Study the Friction of the Red Blood Cells

在线全文

学校读者我要写书评

暂无评论

Advances in Bioscience and Biotechnology 2024年第2期15卷 100-111页

作者： Edoukoua Jean michel Konin Pavel Yale Abadê Ange-Boris N’guessan Kouassi Benoit Kouakou Abaka michel Kouacou Eugene Megnassan Département des Sciences et Techniques Université Alassane Ouattara Bouaké C&#244te d’Ivoire Laboratoire d’Instrumentation Image et Spectroscopie (L2IS) Institut National Polytechnique Félix Houphou&#235t-Boigny (INPHB) Yamoussoukro C&#244te d’Ivoire Classes préparatoires aux grandes Ecoles Université de San Pedro San Pedro C&#244te d’Ivoire Laboratoire de Physique Fondamentale et Appliquée Université Nangui Abrogoua (UNA) Abidjan C&#244te d’Ivoire

In the last two decades the study of red blood cell elasticity using optical tweezers has known a rise appearing in the scientific research with regard to the various works carried out. Despite the various work done, no study has been done so far to study the influence of friction on the red blood cell indentation response using optical tweezers. In this study, we have developed a new approach to determine the coefficient of friction as well as the frictional forces of the red blood cell. This approach therefore allowed us to simultaneously carry out the indentation and traction test, which allowed us to extract the interfacial properties of the microbead red blood cell couple, among other things, the friction coefficient. This property would be extremely important to investigate the survival and mechanical features of cells, which will be of great physiological and pathological significance. But taking into account the hypothesis of friction as defined by the isotropic Coulomb law. The experiment performed for this purpose is the Brinell Hardness Test (DB).

关键词： Friction Indentation Optical Tweezers Tribology Red Blood Cells

Dissolved Organic Matter Features of Three Adjacent Eastern Mediterranean Urbanized Watersheds

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Modern Hydrology 2024年第3期14卷 153-173页

作者： Nour Abboud Elias michel Maatouk Zeinab Matar Veronique Kazpard Research and Analysis Platform for Environmental Sciences (PRASE) Doctoral School of Sciences and Technology (EDST) The Lebanese University Rafic Hariri Campus Hadat Lebanon Laboratory of Georessources Geosciences and Environment (L2GE) Faculty of Sciences The Lebanese University Fanar Lebanon Department of Earth and Life Sciences Faculty of Sciences The Lebanese University Hadat Lebanon

Landscape urbanization broadly affects ecosystems in coastal watersheds, but, until now, the influence of nonpoint source urban inputs on dissolved organic matter (DOM) amount, composition, and source is poorly understood. To understand how DOM composition varied with urbanization, fluorescence excitation-emission matrices (EEMs) were determined for urban and non-urban waters from upstream to downstream sites along three adjacent coastal watersheds that flow into the Mediterranean Sea. Two humic DOM fluorescent components (humic-like and fulvic-like peaks) and two proteinic components (tyrosine-like and tryptophane-like peaks) were identified by EEM fluorescence. The results indicated that urbanization had an important influence on DOM concentration and composition, with urban waters having a high degree of DOM variation due to different land uses surrounding each body of water. Urban waters show a higher DOM fluorescence index (FI), the highest fluorescence intensity of protein-like manifested also by BIX values, and a lower value of the humification index (HIX) than non-urban waters which were dominated by allochthonous inputs. In addition, the EEM was compared in dry and wet season where higher DOM amounts and FI appeared in summer due to autochthonous production coming from algae growth compared to allochthonous input from rainfall dominated in wet season. The concentration of DOC increased from upstream to downstream for the three rivers, especially Beirut River. The increase in DOC values was observed in both dry and wet seasons by 39 and 19 times respectively compared to upstream (0.93 - 0.91 mgC/L).

关键词： Dissolved Organic Matter DOM EEM Fluorescence Spectroscopy Autochthonous/Allochthonous DOM Urbanization Upstream/Downstream Wet/Dry Season

Human Eosinophil Cell Manipulation by Optical Tweezers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Biophysics 2024年第3期14卷 330-338页

作者： Pavel Yale Jean michel Edoukoua Konin Abadê Ange-Boris N’guessan michel Abaka Kouacou Jérémie T. Zoueu Laboratoire dInstrumentation Image et Spectroscopie (L2IS) Institut National Polytechnique Houphout-Boigny (INPHB) Yamoussoukro Cte dIvoire Laboratoire de Chimie et de Physique Appliques Sciences et Techniques Universit Alassane Ouattara Bouak Cte dIvoire

In this work, lateral deformation of human eosinophil cell during the lateral indentation by an optically trapped microbead of diameter 4.5 µm is studied. The images were captured using a CCD camera and the Boltzmann statistics method was used for force calibration. Using the Hertz model, we calculated and compared the elastic moduli resulting from the lateral force, showing that the differences are important and the force should be considered. Besides the lateral component, the setup also allows us to examine the lateral cell-bead interaction. The mean values of the properties obtained, in particular the elastic stiffness and the shear stiffness, were Eh = (37.76 ± 2.85) µN/m and Gh = (12.57 ± 0.32) µN/m. These results show that the lateral indentation can therefore be used as a routine method for cell study, because it enabled us to manipulate the cell without contact with the laser.

关键词： Optical Tweezers Human Eosinophil Cell Indentation Shear Stiffness

Modelling of a WDM Network Using Graph Theory and Dijkstra Algorithm for Traffic Redirection

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 Computer and Communications 2024年第7期12卷 78-93页

作者： Eric michel Deussom Djomadji Ebude Carine Awasume Eloundou Boris Donald Department of Electrical and Electronic Engineering College of Technology University of Buea Buea Cameroon Division of ICT National Advanced School of Post Telecommunication and ICT University of Yaounde I Yaounde Cameroon

Optical transport networks are now the basic infrastructure of modern communications systems, including the SDH and WDM backbone network of local network operators, in the case of Cameroon. Given the colossal investments required to deploy these networks, particularly related to the cost of equipment (optical fibers, transponders and multiplexers), the optimization of bandwidth and dynamic allocation of resources is essential to control operating costs and ensure continuity of service. Automatic switching technology for optical networks brings intelligence to the control plane to fully facilitate bandwidth utilization, traffic redirection, and automatic configuration of end-to-end services. This paper considers a local network operator’s WDM network without the implementation of the automatic switching technology, develops a network modeling software platform called Graphic Networks and using graph theory integrates a particularity of the automatic switching technology, which is the automatic rerouting of traffic in case of incident in the network. The incidents considered here are those links or route failures and node failures.

关键词： Graph Theory Backbone Network WDM Djikstra Algorithm