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all-optical motion control of metal nanoparticles powered by propulsion forces tailored in 3D trajectories

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Photonics Research 2021年第1期9卷 1-12页

作者： oséARODRIGO MERCEDES ANGULO TATIANA alIEVA Universidad Complutense de Madrid Facultad de Ciencias FisicasCiudad Universitarias/nMadrid 28040Spain

Increasing interest has been drawn to optical manipulation of metal(plasmonic)nanoparticles due to their unique response on electromagnetic radiation,prompting numerous applications in nanofabrication,photonics,sensing,*** familiar point-like laser tweezers rely on the exclusive use of optical confinement forces that allow stable trapping of a single metal nanoparticle in 3 *** all-optical(contactless)confinement and motion control of single and multiple metal nanoparticles is one of the major challenges to be *** article reports and provides guidance on mastering a sophisticated manipulation technique harnessing confinement and propulsion forces,enabling simultaneous all-optical confinement and motion control of nanoparticles along 3 D *** an example,for the first time to our knowledge,programmable transport of gold and silver nanospheres with a radius of 50 and 30 nm,respectively,along 3 D trajectories tailored on demand,is experimentally *** has been achieved by an independent design of both types of optical forces in a single-beam laser trap in the form of a reconfigurable 3 D *** controlled motion of multiple nanoparticles,far away from chamber walls,allows studying induced electrodynamic interactions between them,such as plasmonic coupling,observed in the presented *** independent control of optical confinement and propulsion forces provides enhanced flexibility to manipulate matter with light,paving the way to new applications involving the formation,sorting,delivery,and assembling of nanostructures.

关键词： motion walls silver

U-Concordant Semigroups

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algebra Colloquium 2018年第2期25卷 295-318页

作者： Xueming Ren Yanhui Wang K.P. shum Department of Mathematics Xi'an University of Architecture and Technology Xi'an 710055 China College of Mathematics and Systems Science Shandong University of Science and Technology Qingdao Shandong 266590 China Institute of Mathematics Yunnan University Kunming 650091 China

We introduce the relations L ^ U and R ^ U with respect to a subset U of idempotents. Based on L ^ U and R ^ U , we define a new class of semigroups which we name U -concordant semigroups. Our purpose is to describe U -concordant semigroups by generalized categories over a regular biordered set. We show that the category of U -concordant semigroups and admissible morphisms is isomorphic to the category of RBS generalized categories and pseudo functors. Our approach is inspired from Armstrong’s work on the connection between regular biordered sets and concordant semigroups. The significant difference in strategy is by using RBS generalized categories equipped with pre-orders, we have no need to discuss the quotient of a category factored by a congruence.

关键词：阿姆斯特朗 RBS 范畴集合

Good B-quasi-Ehresmann semigroups

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Science China Mathematics 2010年第5期53卷 308-319页

作者： He Yong shum, KarPing Wang ZhengPan Hunan Univ Sci & Technol Sch Comp Sci & Technol Inst Theories Algebra & Automaton Xiangtan 411201 Peoples R China Univ Hong Kong Dept Math Hong Kong Hong Kong Peoples R China Southwest Univ Dept Math Chongqing 400715 Peoples R China

A semigroup S with a sub-band B is called a good B-quasi-Ehresmann semigroup if it is a Bsemiabundant semigroup satisfying the congruence condition such that B((ab)+)abB((ab)*)aB(a*)B(b+)b for all a,b ∈*** show that every good B-quasi-Ehresmann semigroup has a global representation and a standard *** a special case,the structure of good quasi-adequate semigroups is described.

关键词： good B-quasi-Ehresmann semigroup global representation standard representation good quasiadequate semigroup

Characterization of housing stock for energy retrofitting purposes in Spain

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Building Simulation 2023年第6期16卷 947-962页

作者： Juan M.González-Caballín Sánchez A.Meana-Fernández J.C.Ríos-Fernández A.J.Gutiérrez Trashorras Thermal Engines and Motors Area Department of EnergyUniversity of OviedoC/Wifredo Ricart s/nGijónAsturias33204Spain

Energy saving in existing buildings is of vital *** this work,the characterization of housing stock in Spain for energy retrofitting purposes has been *** regulations in force when the existing stock was constructed(1980–2007)were considered to model the envelope and thermal systems of single-family and block *** energy consumption and CO_(2) emissions were estimated for each type of dwelling and location,ranging from 44.2 to 130.6 kWh/(m^(2)·year)(13.6–32 kg CO_(2)/(m^(2)·year))for multi-family homes,and 85.5 to 213.5 kWh/(m^(2)·year)(17.1–45.2 kg CO_(2)/(m^(2)·year))for single-family homes.A global picture of the energy performance and emissions for 13 different climate zones was obtained with a total of 504 *** of the envelope allowed the reduction of consumption and emissions from 37.7%to 58%,depending on the climate *** consumption per square meter in block housing was lower than in single-family housing;nevertheless,single-family houses responded more effectively to energy improvement ***,non-renewable primary energy savings seem a better indicator of the improvement by retrofitting than the energy *** building models designed in this work may serve as a reference for subsequent research concerning energy retrofitting and energy savings of housing stock.

关键词： housing stock characterization building retrofitting representative building climate zone simulation model

The emotional structuring of the Andean territory: Mapping embodied narratives in Coporaque, Peru

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Frontiers of Architectural Research 2023年第5期12卷 985-998页

作者： Gonzalo Ríos-Vizcarra Luis Enrique Calatayud-Rosado aleixandre Brian Duche-Perez Víctor Cano-Ciborro Faculty of Architecture and Civil and Environmental Engineering Universidad Católica de Santa MaríaArequipa 04001Peru Faculty of Social Sciences and Technologies and Humanities Universidad Católica de Santa MaríaArequipa 04001Peru The Higher Technical School of Architecture of Madrid Polytechnic University of MadridMadrid 28040Spain

This research explores the subject of territory,understood based on the life world of Andean inhabitants of the Colca Valley(Arequipa,Peru),who are descendants of ancient local Indigenous groups that,since prehistoric times,have known how to adapt to the rugged geographical reality of the *** a phenomenological approach,which assesses the subjective experience,it was possible to corroborate the existence of routine patterns of spatiality that preserve the emotional essence of past territorial conceptions,which have prevailed despite the hegemonic impositions systematically forced upon the land ever since the Spanish conquest in the 16th *** carrying out coexistence fieldwork in situ,five layers of territorial sense have been registered,which,besides being very useful in order to optimize and give coherence to their agricultural and animal husbandry tasks,are periodically represented through verbal and corporal narratives,which have been mapped in this work in order to make their dynamics of symbolization visible and to conclude in the existence of an emotional Andean territory.

关键词： Life world Territory Affection Andean Colca valley Phenomenology Narratives

On Ordered rpp Semigroups with Max-idempotents

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algebra Colloquium 2015年第1期22卷 11-22页

作者： Xiaojiang Guo Chenchen Ren K.P. shum Department of Mathematics Jiangxi Normal University Nanchang Jiangxi 330022 China Institute of Mathematics Yunnan University Kunming Yunnan 650091 China

In this paper, we establish a structure theorem of naturally ordered rpp semigroups with max-idempotents. Results on naturally ordered semigroups with max- idempotents in the literature are extended and amplified. Some previous results obtained by Blyth, McFadden, Cuo and Xie on regular and abundant ordered semigroups are ex- tended to ordered roo semigrouos.

关键词： naturally ordered semigroup rpp semigroup greatest inverse maximal idem-potent

On solubility and supersolubility of some classes of finite groups

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Science China Mathematics 2009年第2期52卷 272-286页

作者： shum Kar Ping SKIBA alexander N. Department of Mathematics University of Hong Kong Department of Mathematics Francisk Skorina Gomel State University

Let G be a finite group and H a subgroup of G. Then H is said to be S-permutable in G if HP = PH for all Sylow subgroups P of G. Let HsG be the subgroup of H generated by all those subgroups of H which are S-permutable in G. Then we say that H is S-embedded in G if G has a normal subgroup T and an S-permutable subgroup C such that T ∩ H HsG and HT = C. Our main result is the following Theorem A. A group G is supersoluble if and only if for every non-cyclic Sylow subgroup P of the generalized Fitting subgroup F*(G) of G, at least one of the following holds: (1) Every maximal subgroup of P is S-embedded in G. (2) Every cyclic subgroup H of P with prime order or order 4 (if P is a non-abelian 2-group and H Z∞(G)) is S-embedded in G.

关键词： S-permutable subgroups S-embedded subgroups saturated formations generalized Fitting subgroups supersoluble groups

Oil-mediated high-throughput generation and sorting of water-in-water droplets

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Microsystems & Nanoengineering 2020年第1期6卷 484-493页

作者： Lang Nan Yang Cao Shuai Yuan Ho Cheung shum Department of Mechanical Engineering The University of Hong KongPokfulam RoadHong KongChina Department of Electrical and Electronic Engineering The University of Hong KongPokfulam RoadHong KongChina

Aqueous two-phase system(ATPS)droplets have demonstrated superior compatibility over conventional water-in-oil droplets for various biological ***,the ultralow interfacial tension hampers efficient and stable droplet generation,limiting further development and more extensive use of such ***,we present a simple strategy to employ oil as a transient medium for ATPS droplet *** methods based on passive flow focusing and active pico-injection are demonstrated to generate water-water-oil double emulsions,achieving a high generation frequency of~2.4 *** evaporation of the oil to break the double emulsions,the aqueous core can be released to form uniform-sized water-in-water ***,this technique can be used to fabricate aqueous microgels,and the introduction of the oil medium enables integration of droplet sorting to produce single-cell-laden hydrogels with a harvest rate of over 90%.We believe that the demonstrated high-throughput generation and sorting of ATPS droplets represent an important tool to advance droplet-based tissue engineering and single-cell analyses.

关键词： limiting sized compatibility

Stochastic modeling,analysis,and simulation of the COVID-19 pandemic with explicit behavioral changes in Bogota:Acase study

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Infectious Disease Modelling 2022年第1期7卷 199-211页

作者： David Nino-Torres Andres Ríos-Gutierrez Viswanathan Arunachalam Comfort Ohajunwa Padmanabhan Seshaiyer Department of Statistics Universidad Nacional de ColombiaBogotaColombia George Mason University FairfaxVAUSA

In this paper,a stochastic epidemiological model is presented as an extension of a compartmental SEIR model with random perturbations to analyze the dynamics of the COVID-19 pandemic in the city of Bogota D.C.,*** model incorporates thespread of COVID-19 impacted by social behaviors in the population and allows for projecting the number of infected,recovered,and deceased individuals considering the mitigation measures,namely confinement and partial relaxed ***,the role of randomness using the concept of Brownian motion is emphasized to explain the behavior of the *** experiments for the stochastic model with random perturbations were performed,and the model is validated through numerical simulations for actual data from Bogota D.C.

关键词： Epidemic spread SARS-CoV-2 Compartmental modeling Stochastic perturbations Parameter estimation