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Evaluation of phase change materials for a light-weight building in Morocco:Effect of building’s volume,window orientation&infiltration

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Energy and Built Environment

Energy and Built Environment 2024年第6期5卷 863-877页

作者： Imad Ait Laasri Niima es-sakali Abdelkader Outzourhit Mohamed Oualid Mghazli Laboratory(LaMEE) Faculty of Sciences SemlaliaCadi Ayyad UniversityMarrakeshMorocco Laboratory(LmaID) Rabat National School of MineRabatMorocco Green Energy Park(UM6P/IResEN) km2 R206BenguerirMorocco ENTPE LTDS UMR CNRS 5513Universitéde LyonCedexVaulx-en-VelinFrance

In this study,we will model a light-weight building made of phase change materials(PcMs)to analyze the impact of the building volume,window orientation,and air infiltration on the PcM *** is done by calculating the energy savings attained by the use of PcM across all of ***’ll use the commercial Rubitherm panels with RT28Hc as a phase change material in this ***,the EnergyPlus simulation engine is chosen to perform the *** impact of building volumes is also evaluated on the PcM activation for light-weight square buildings with different side lengths of 10 m,9 m,8 m,and 7 ***,we looked at how well the PcM performed in terms of energy savings and thermal regulation at different window orientation placements(south,north,west,and east)and various air infiltration rates(0.5,1,1.5,and 3 AcH).This paper’s primary objective is to determine the energy savings for the PcM-enhanced building in Morocco,as well as the effect of building volume,window orientation,and infiltration on the PcM capabilities for stabilizing the indoor room *** results show good indoor temperature stabilization during the summer,for the light-weight square building with a south-facing window and no air *** configuration was able to achieve a total fluctuation reduction of 1303.3℃for the 10 m building in a semi-arid ***,a high energy savings percentage of 69.56%was achieved for the PcM-enhanced building with the south-oriented window and air infiltration of 0.5 air change per hour.

关键词： Building energy efficiency Phase change materials Passive thermal regulation

Tuning MXenes Towards Their Use in Photocatalytic Water splitting

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Energy & Environmental materials 2024年第6期7卷 321-331页

作者： Diego Ontiveros sergi Vela Francesc Viñes carmen sousa Departament de ciència de materials i Química Física&Institut de Química Teòrica i computacional(IQTcUB) Universitat de Barcelonac/Martíi Franquès 1-1108028 BarcelonaSpain

Finding appropriate photocatalysts for solar-driven water(H_(2)O)splitting to generate hydrogen(H_(2))fuel is a challenging task,particularly when guided by conventional trial-and-error experimental ***,density functional theory(DFT)is used to explore the MXenes photocatalytic properties,an emerging family of two-dimensional(2D)transition metal carbides and nitrides with chemical formula M_(n+1)X_(n)T_(x),known to be semiconductors when having T_(x)*** than 4,000 MXene structures have been screened,considering different compositional(M,X,T_(x),and n)and structural(stacking and termination position)factors,to find suitable MXenes with a bandgap in the visible region and band edges that align with the water-splitting half-reaction *** from bandgap analysis show how,in general,MXenes with n=1 and transition metals from group III present the most cases with bandgap and promising sizes,with c-MXenes being superior to *** band alignment calculations of candidate systems with a bandgap larger than 1.23 eV,the minimum required for a water-splitting process,sc_(2)cT_(2),Y_(2)cT_(2)(T_(x)=cl,Br,s,and se)and Y_(2)cI_(2)are highlighted as adequate photocatalysts.

关键词： Density Functional Theory MXenes Photocatalysis Water splitting

Transcranial magneto-Acoustic stimulation Attenuates synaptic Plasticity Impairment through the Activation of Piezo1 in Alzheimer’s Disease Mouse Model

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Research 2024年第1期2023卷 81-95页

作者： Fangxuan chu Ruxin Tan Xin Wang Xiaoqing Zhou Ren ma Xiaoxu ma Ying Li Ruixu Liu chunlan Zhang Xu Liu Tao Yin Zhipeng Liu Institute of Biomedical Engineering Chinese Academy of Medical Sciences and Peking Union Medical CollegeTianjin300192China Tianjin Institutes of Health science Tianjin301600China Neuroscience center Chinese Academy of Medical Science&Peking Union Medical CollegeBeijing100730China

The neuropathological features of Alzheimer’s disease include amyloid *** emerging evidence suggests that Piezo1,a mechanosensitive cation channel,plays a critical role in transforming ultrasound-related mechanical stimuli through its trimeric propeller-like structure,but the importance of Piezo1-mediated mechanotransduction in brain functions is less ***,apart from mechanical stimulation,Piezo1 channels are strongly modulated by *** assume that Piezo1 may play a role in converting mechanical and electrical signals,which could induce the phagocytosis and degradation of Aβ,and the combined effect of mechanical and electrical stimulation is superior to single mechanical ***,we design a transcranial magneto-acoustic stimulation(Tmas)system,based on transcranial ultrasound stimulation(TUs)within a magnetic field that combines a magnetoacoustic coupling effect electric field and the mechanical force of ultrasound,and applied it to test the above hypothesis in 5xFAD *** tests,in vivo electrophysiological recordings,Golgi–cox staining,enzyme-linked immunosorbent assay,immunofluorescence,immunohistochemistry,real-time quantitative PcR,Western blotting,RNA sequencing,and cerebral blood flow monitoring were used to assess whether Tmas can alleviate the symptoms of AD mouse model by activating Piezo1.

关键词： stimulation Alzheimer Piezo1

combined Effect of Outdoor Time and Other Modifiable Factors on Myopia Incidence Among children and Adolescents—9 PLADs,china,2020

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china cDc weekly 2024年第9期6卷 151-156,I0001,I0002页

作者： Panliang Zhong Yunfei Liu Ning ma Jiajia Dang Di shi shan cai Ziyue chen Yanhui Dong Peijin Hu Jun ma Patrick W.c Lau Randall s.stafford Yi song Institute of child and Adolescent Health School of Public HealthPeking UniversityNational Health Commission Key Laboratory of Reproductive HealthBeijingChina Department of sport Physical Education&HealthHong Kong Baptist UniversityKowloon TongHong Kong Special Administrative RegionChina Department of Medicine Stanford Prevention Research CenterStanford University School of MedicineStanfordCAUnited States

summary What is already known about this topic?Myopia has been identified as a significant emerging challenge and policy priority among children and adolescents in china by the Ministry of Education and seven other *** research has been conducted to investigate the collective impact of outdoor time and other modifiable factors on the incidence of myopia.

关键词： Incidence collective policy

High efficiency photothermal cyclic self-healing antibacterial coating based on in-situ dual-functional BiOI@Bi_(2)s_(3)

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Journal of materials science & Technology 2024年第6期173卷 121-136页

作者： Huimeng Feng Tong Wang Wei Wang chengcheng ma Yanan Pu shougang chen school of materials science and Engineering Ocean University of ChinaQingdao 266100China

Although extremely challenging,it is highly desirable to develop self-healing materials that exhibit high efficiency under environmental conditions for marine protection *** this work,polyurethane elastomers with hydrogen bond and dimethylglyoxime-urethane(DOU)coordination complex were combined with in-situ dual-functional BiOI@Bi_(2)s_(3) to synthesize high-efficiency photothermal cyclic self-healing antibacterial *** photothermal efficiency of BiOI@Bi_(2)s_(3) is improved by 38% through interfacial ***@Bi_(2)s_(3)/PU rapidly rises by 50.2℃ within 300 s under near-infrared(NIR)light,which can trigger the hydrogen bond of polyurethane coating and recover the barrier properties of the coating through *** functional theory was used to simulate and analyze the generation of multiple electron transfer paths after the vulcanization of BiOI,which improves the interfacial mobility of photogenerated carriers and generates more ***,molecular dynamics verified the self-healing mechanism of hydrogen bond and the photothermal lifting mechanism of the *** 5th scratches and self-healing cycle tests,the coating has a self-healing efficiency of more than 80%,which can ensure the self-healing and anticorrosion protection performance of the coating for multiple *** photocatalytic and photothermal properties of BiOI@Bi_(2)s_(3) enhance the antibacterial rate of the coating up to 99%.This work provides heuristic perspectives for the design of coatings with anti-corrosion,antibacterial and self-healing properties.

关键词： self-healing Photothermal Interfacial regulation Dual-functional BiOI@Bi_(2)s_(3) Antibacterial

A concise proof of Benford's law

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Fundamental Research 2024年第4期4卷 841-844页

作者： Luohan Wang Bo-Qiang ma school of Physics Peking UniversityBeijing 100871China center for High Energy Physics Peking UniversityBeijing 100871China collaborative Innovation center of Quantum matter Beijing 100871China

This article presents a concise proof of the famous Benford's law when the distribution has a Riemann integrable probability density function and provides a criterion to judge whether a distribution obeys the *** proof is intuitive and elegant,accessible to anyone with basic knowledge of calculus,revealing that the law originates from the basic property of human number *** criterion can bring great convenience to the field of fraud detection.

关键词： Benford's law First-digit law significant digit law Proof criterion

Human influence on the duration of extreme temperature events in Asia's hotspot regions

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Advances in climate change Research 2024年第2期15卷 312-326页

作者： Zi-Meng WANG Hong-Yun ma Wei LI Hai-shan cHEN collaborative Innovation center on Forecast and Evaluation of Meteorological Disasters(cIc-FEMD)/Key Laboratory of Meteorological Disaster Ministry of Education(KLME)Nanjing University of Information Science and TechnologyNanjing 210044China

Observations and models indicate that human activities exert a considerable impact on the frequency and intensity of extreme temperature events,which are associated with global ***,changes in the duration of extreme temperature events and their association with human influence have not been considered in most ***,the possible relationship between the observed changes in the warm and cold spell duration(WsDI and csDI)in hotspot regions during 1960-2014 and human influence was investigated based on the NcEP/NcAR reanalysis version 1 and coupled Model Inter-comparison Project Phase 6(cMIP6)*** projection based on these attribution results was also *** optimal fingerprinting technique was used to compare observed changes in WsDI and csDI to simulated changes averaged across eight cMIP6 *** show that anthropogenic(ANT)forcing contributed to the observed increase in WsDI in the three hotspot regions(West Asia,south Asia and southeast Asia),with the majority of the changes being attributed to greenhouse gas ***,a generally weak ANT signal can be observed in the decreasing trend of csDI and can be detected in south and southeast *** influence of aerosol forcing remains undetected in either WsDI or csDI,which differs from the results for frequency and intensity of extreme *** attribution results revealed that the constrained projection of WsDI is lower than the raw projection for 2015-2100 in West Asia and southeast ***,no differences in future csDI changes are found in southeast Asia between the constrained and raw projections.

关键词： Extreme temperature events Duration Detection attribution constraint projection Hotspot regions

convergence,scalarization and continuity of Minimal solutions in set Optimization

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Journal of the Operations Research society of china 2024年第3期12卷 773-793页

作者： Karuna c.s.Lalitha Department of mathematics University of DelhiDelhiDelhi110007India Department of mathematics University of Delhi South CampusNew DelhiDelhi110021India

The paper deals with the study of two different aspects of stability in the given space as well as the image space,where the solution concepts are based on a partial order relation on the family of bounded subsets of a real normed linear *** first aspect of stability deals with the topological set convergence of families of solution sets of perturbed problems in the image space and Painlevé–Kuratowski set convergence of solution sets of the perturbed problems in the given *** convergence in the given space is also established in terms of solution sets of scalarized perturbed *** second aspect of stability deals with semicontinuity of the solution set maps of parametric perturbed problems in both the spaces.

关键词： Topological convergence Painlevé-Kuratowski convergence Upper semicontinuity Lower semicontinuity stability scalarization

Hybrid-integrated 200 Gb/s REc-DML array transmitter based on photonic wire bonding technology

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chinese Optics Letters 2024年第8期22卷 64-69页

作者： Yuxin ma Jie Zhao Tongtong Yang Yipeng Mei Zhenxing sun Jun Lu shaobo Li Xiang ma Xiangfei chen Key Laboratory of Intelligent Optical sensing and manipulation of the Ministry of Education&National Laboratory of solid state Microstructures&college of Engineering and Applied sciences&Institute of Optical communication Engineering&Nanjing University-Tongding Joint Lab for Large-scale Photonic Integrated circuits Nanjing UniversityNanjing 210023China Optical communication Research and Development center 54th Research Institute of China Electronics Technology Group CorporationShijiazhuang 050081China

An 8-channel hybrid-integrated chip for 200 Gb/s(8×25 Gb/s)signal transmission has been *** channels are all within the O-band,and with a spacing of 800 *** core of this chip is a monolithic integrated multi-wavelength laser array of 8 directly-modulated distributed feedback(DFB)*** using the reconstruction equivalent chirp technique,multi-wavelength integration and asymmetric phase shift structures are achieved in the laser *** output laser beams of the array are combined by a planar light-wave circuit,which is hybrid-integrated with the laser array by photonic wire *** results of this transmitter chip show good single-mode working of each unit laser,with a sidemode suppression ratio above 50 dB,and the modulation bandwidth is above 20 *** eye diagrams are obtained in the lasers for 25 Gb/s non-return-to-zero modulation,which implies a total 200 Gb/s transmission rate for the whole chip.

关键词： direct modulation laser array reconstruction equivalent chirp photonic wire bonding hybrid integration