检索结果-南通市图书馆

Mean-field description of heavy-ion scattering at low energies and fusion

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and techniques 2018年第12期29卷 102-111页

作者： Dao t.Khoa le Hoang Chien Do Cong cuong Nguyen Hoang Phuc Institute for Nuclear Science and technology VINATOM Department of Nuclear Physics and Nuclear Engineering Faculty of Physics and Engineering Physics University of Science VNU-HCM

the nuclear mean-field potential built up during the ^(12)C+^(12)C and ^(16)O+^(16)O collisions at low energies relevant for the carbon-and oxygen-burning processes is constructed within the double-folding model(DFM) using the realistic ground-state densities of^(12)C and^(16)O, and CDM3Yn density-dependent nucleon–nucleon(NN) interaction. the rearrangement term, indicated by the Hugenholtz–van Hove theorem for the single-particle energy in nuclear matter, is properly considered in the DFM calculation. to validate the use of the density-dependent NN interaction at low energies, an adiabatic approximation was suggested for the dinuclear overlap density. the reliability of the nucleus–nucleus potential predicted through this low-energy version of the DFM was tested in the optical model(OM) analysis of the elastic^(12)C+^(12)C and ^(16)O+^(16)O scattering data at energies below 10 MeV/*** OM results provide a consistently good description of the elastic angular distributions and 90 excitation function. the dinuclear mean-field potential predicted by the DFM is further used to determine the astrophysical S factor of the ^(12)C+^(12)C and ^(16)O+^(16)O fusions in the barrier penetration model. Without any adjustment of the potential strength, our results reproduce the non-resonant behavior of the S factor of the ^(12)C+^(12)C and ^(16)O+^(16)O fusions very well over a wide range of energies.

关键词：精力熔化散布重离子状态密度密度依赖相互作用天体物理学

SARS-CoV-2-specific t cells in infection and vaccination

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2021年第10期18卷 2307-2312页

作者： Antonio Bertoletti Nina le Bert Martin Qui Anthony t.tan Programme in Emerging Infectious Diseases Duke-NUS Medical SchoolSingaporeSingapore Singapore Immunology Network A*STARSingaporeSingapore

During viral infections,antibodies and t cells act together to prevent pathogen spread and remove virus-infected *** adaptive immunity can,however,also trigger pathological processes characterized by localized or systemic inflammatory *** protective and/or pathological role of virus-specific t cells in SARS-CoV-2 infection has been the focus of many studies in COVID-19 patients and in vaccinated ***,we review the works that have elucidated the function of SARS-CoV-2-specific t cells in patients and in vaccinated *** whether SARS-CoV-2-specific t cells are more linked to protection or pathogenesis is pivotal to define future therapeutic and prophylactic strategies to manage the current pandemic.

关键词： SARS-CoV-2 Vaccines t cells COVID-19

Building 3D CityGML models of mining industrial structures using integrated UAV and tLS point clouds

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 Coal Science & technology 2023年第5期10卷 158-177页

作者： Canh le Van cuong Xuan Cao Anh Ngoc Nguyen Chung Van Pham Long Quoc Nguyen Department of Mine Surveying Hanoi University of Mining and GeologyHanoiVietnam Viettel Group Viettel Cyberspace CenterHanoiVietnam

Mining industrial areas with anthropogenic engineering structures are one of the most distinctive features of the real world.3D models of the real world have been increasingly popular with numerous applications,such as digital twins and smart factory *** this study,3D models of mining engineering structures were built based on the CityGML *** collecting spatial data,the two most popular geospatial technologies,namely UAV-SfM and tLS were *** accuracy of the UAV survey was at the centimeter level,and it satisfied the absolute positional accuracy requirement of creat-ing all levels of detail(LoD)according to the CityGML ***,the UAV-SfM point cloud dataset was used to build LoD 2 *** addition,the comparison between the UAV-SfM and tLS sub-clouds of facades and roofs indicates that the UAV-SfM and tLS point clouds of these objects are highly consistent,therefore,point clouds with a higher level of detail and accuracy provided by the integration of UAV-SfM and tLS were used to build LoD 3 *** resulting 3D CityGML models include 39 buildings at LoD 2,and two mine shafts with hoistrooms,headframes,and sheave wheels at LoD3.

关键词： 3D modelling CityGML-Mining industry UAV terrestrial laser scanning Point cloud

Clinical validation of the early embryo viability assessment system: Analysis for the blastocyst morphology and pregnancy outcomes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian pacific Journal of Reproduction 2024年第5期13卷 219-227页

作者： Vu D Hop An M cuong Phi t t Anh Nguyen t L Huong le Hoang Nguyen V Hanh Assisted Reproductive technology Centre Tam Anh General HospitalHanoiVietnam Institute of Biotechnology Vietnam Academy of Science and TechnologyHanoiVietnam

Objective:to determine the relationship between the early embryo viability assessment(EEVA)and blastocyst morphological parameters and pregnancy ***:this retrospective cohort study was conducted on 291 intracytoplasmic sperm injection cycles including 2522 embryos with indications of prolonging embryo culture to the blastocyst stage in the Genea embryo review incubator,and 511 single vitrified-warmed blastocyst transfer cycles from January 2020 to June *** EEVA system produced an EEVA score from E1(best)to E5(worse)for the potential of blastocyst *** morphology was *** association between the EEVA score and each type of blastocyst morphology,implantation rate,clinical pregnancy,and ongoing pregnancy were assessed using generalized estimating ***:the inner cell mass A(ICM A),trophectoderm A(tE A),blastocoele expansion degree of 3,4,5,6,7 rates were higher with lower the EEVA *** adjusted odd ratio(aOR)(E5 vs E1)was 0.3 for ICM A,0.174 for tE A and 0.210 for BL3,4,5,6,7(all Pting a significant association between lower EEVA scores and improved embryo *** implantation,clinical pregnancy,and ongoing pregnancy rate were also higher with lower the EEVA *** aOR of E5 vs E1 was 0.245 for implantation,0.185 for clinical pregnancy and 0.200 for ongoing pregnancy rate(Pthere were associations between blastocyst morphology,pregnancy outcome and EEVA *** good blastocyst morphology and pregnancy outcomes are higher with lower the EEVA score.

关键词： Automated embryo assessment Blastocyst Early embryo viability assessment Genea embryo review incubator Morphology Pregnancy outcomes timelapse

Unusual switchable peroxidase-mimicking nanozyme for the determination of proteolytic biomarker

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2019年第3期12卷 509-516页

作者： Claire McVey Natasha Logan Nguyen t. K. thanh Christopher Elliott.cuong Cao Institute for Global Food Security School of Biological Sciences Queens University Belfast 18-30 Malone Road Belfast BT9 5BN UK Biophysics Group Department of Physics and Astronomy University College London London WC1E 6BT UK UCL Healthcare Biomagnetic and Nanomaterials Laboratories 21 Albemarle Street London W1S 4BS UK Material and Advanced technologies for Healthcare Queens University Belfast 18-30 Malone Road Belfast BT9 5BN UK

Detection of enzyme biomarkers originating from either bio-fluids or contaminating microorganisms is of utmost importance in clinical diagnostics and food safety. Herein, we present a simple, low-cost and easy-to-use sensing approach based on the switchable peroxidase-mimicking activity of plasmonic gold nanoparticles (AuNPs) that can catalyse for the oxidation of 3,3’,5’5-tetramethylbenzidine (tMB) for the determination of protease enzyme. the AuNP surface is modified with casein, showing dual functionalities. the first function of the coating molecule is to suppress the intrinsic peroxidase-mimicking activity of AuNPs by up to 77.1%, due to surface shielding effects. Secondly, casein also functions as recognition sites for the enzyme biomarker. In the presence of protease, the enzyme binds to and catalyses the degradation of the coating layer on the AuNP surface, resulting in the recovery of peroxidase-mimicking activity. this is shown visually in the development of a blue colored product (oxidised tMB) or spectroscopically as an increase in absorbance at 370 and 650 nm. this mechanism allows for the detection of protease at 44 ng·mL^-1 in 90 min. the nanosensor circumvents issues associated with current methods of detection in terms of ease of use, compatibility with point-of-care testing, low-cost production and short analysis time. the sensing approach has also been applied for the detection of protease spiked in ultra-heat treated (UHt) milk and synthetic human urine samples at a limit of detection of 490 and 176 ng·mL^-1, respectively, showing great potential in clinical diagnostics, food safety and quality control.

关键词： gold nano particles peroxidase-mimicking nanozyme enzyme detection biomarkers

Equidistribution for meromorphic transforms and the dd^c-method

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 Mathematics 2005年第z1期48卷 180-194页

作者： tien-cuong Dinh Nessim Sibony Mathématique-Bt.425 UMR 8628 Université Paris-Sud91405 OrsayFranceMathématique-Bt.425 UMR 8628Université Paris-Sud91405 OrsayFrance

In this paper we give an introduction to the notion of meromorphic *** describe some equidistribution problems and their solution, using the ddc-method. In particular, we give some statistical properties of the equilibrium measure for meromorphic maps on compact Kahler manifolds: K-mixing, exponential decay of correlations and central limit theorem.

关键词： meromorphic map, correspondence, compact Kahler manifold.

Stochastic framework for modeling the linear apparent behavior of complex materials:Application to random porous materials with interphases

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2013年第6期29卷 773-782页

作者： J.Guilleminot t.t.le C.Soize Universit Paris-Est Laboratoire Modlisation et Simulation Multi EchelleMSME UMR8208 CNRS5 Bd Descartes77454 Marne la ValleFrance

this paper is concerned with the modeling of randomness in multiscale analysis of heterogeneous materials. More specifically, a framework dedicated to the stochastic modeling of random properties is first introduced. A probabilistic model for matrix-valued second-order random fields with symmetry propertries, recently proposed in the literature, is further reviewed. Algorithms adapted to the Monte Carlo simulation of the proposed representation are also provided. the derivations and calibration procedure are finally exemplified through the modeling of the apparent properties associated with an elastic porous microstructure containing stochastic interphases.

关键词： Apparent properties MaxEnt Probabilistic model

On the derivation of the entropy of ideal quantum gases confined in a three-dimensional harmonic potential

在线全文

学校读者我要写书评

暂无评论

Communications in theoretical Physics 2020年第4期72卷 106-111页

作者： le tri Dat Vinh N t Pham Laboratory of Applied Physics Advanced Institute of Materials ScienceTon Duc Thang UniversityHo Chi Minh City 756636Vietnam Faculty of Applied Sciences Ton Duc Thang UniversityHo Chi Minh City 756636Vietnam Ho Chi Minh City University of Education Ho Chi Minh City 748342Vietnam

In this work,the entropy functions of ideal quantum gases in a three-dimensional harmonic trap are analytically calculated using temperature as an explicit ***,the applicability of the analytical formulas is validated by comparison with the numerical *** results illustrate that the obtained functions could be applied for the whole temperature regime with a maximum relative deviation of less than 7.5%in the vicinity of the critical temperature tcin the case of Bose ***,for Fermi gases,although the analytical formula fits well at very low-and high-temperature regimes,it cannot be applied at temperature in the range[0.3-0.5]t_F,where t_F is the Fermi *** addition,the consistency between our formulas and classical ones at significantly high temperatures is also discussed.

关键词： thermodynamic properties entropy 3D harmonic trap ideal quantum gases

Emotional Vietnamese Speech Synthesis Using Style-transfer learning

在线全文

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第2期44卷 1263-1278页

作者： thanh X.le An t.le Quang H.Nguyen School of Information and Communication technology Hanoi University of Science and TechnologyHanoi10000Vietnam

In recent years,speech synthesis systems have allowed for the produc-tion of very high-quality ***,research in this domain is now turning to the problem of integrating emotions into ***,the method of con-structing a speech synthesizer for each emotion has some ***,this method often requires an emotional-speech data set with many *** data sets are very time-intensive and labor-intensive to ***,training each of these models requires computers with large computational capabilities and a lot of effort and time for model *** addition,each model for each emotion failed to take advantage of data sets of other *** this paper,we propose a new method to synthesize emotional speech in which the latent expressions of emotions are learned from a small data set of professional actors through a Flow-tron *** addition,we provide a new method to build a speech corpus that is scalable and whose quality is easy to ***,to produce a high-quality speech synthesis model,we used this data set to train the tacotron 2 *** used it as a pre-trained model to train the Flowtron *** applied this method to synthesize Vietnamese speech with sadness and *** opi-nion score(MOS)assessment results show that MOS is 3.61 for sadness and 3.95 for *** conclusion,the proposed method proves to be more effec-tive for a high degree of automation and fast emotional sentence generation,using a small emotional-speech data set.

关键词： Emotional speech synthesis ﬂowtron speech synthesis style transfer vietnamese speech