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Universal insertion of molecules in ionic compounds under pressure

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National Science Review 2024年第1期11卷 120-128页

作者： Feng Peng Yanming Ma chris J.Pickard Hanyu Liu Maosheng Miao College of Physics and Electronic Information Luoyang Normal University Department of Chemistry and Biochemistry California State University Northridge State Key Laboratory of Superhard Materials & Key Laboratory of Material Simulation Methods and Software of Ministry of Education College of Physics Jilin University International Center of Future Science Jilin University Department of Materials Science & Metallurgy University of Cambridge Advanced Institute for Materials Research Tohoku University Department of Earth Science University of California Santa Barbara

Using first-principles calculations and crystal structure search methods, we found that many covalently bonded molecules such as H2, N2, CO2, NH3, H2O and CH4may react with NaC l, a prototype ionic solid,and form stable compounds under pressure while retaining their molecular structure. These molecules,despite whether they are homonuclear or heteronuclear, polar or non-polar, small or large, do not show strong chemical interactions with surrounding Na and Cl ions. In contrast, the most stable molecule among all examples, N2, is found to transform into cyclo-N5-anions while reacting with NaC l under high pressures. It provides a new route to synthesize pentazolates, which are promising green energy materials with high energy density. Our work demonstrates a unique and universal hybridization propensity of covalently bonded molecules and solid compounds under pressure. This surprising miscibility suggests possible mixing regions between the molecular and rock layers in the interiors of large planets.

关键词： molecule-solid hybrid materials high-pressure crystal structure prediction density functional theory planet interior

Combined peakreductionandself-consumptionusingproximalpolicy optimisation

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Energy and AI 2024年第2期16卷 24-31页

作者： Thijs Peirelinck chris Hermans Fred Spiessens Geert Deconinck ESAT KU LeuvenKasteelpark Arenberg 10 bus 24453001 LeuvenBelgium AMO Flemish Institute for Technological Research(VITO)Boeretang 2002400 Mol Belgium AMO EnergyVilleThor Park 83103600 GenkBelgium

Residential demand response programs aim to activate demand flexibility at the household *** recent years,reinforcement learning(RL)has gained significant attention for these type of applications.A major challenge of RL algorithms is data *** RL algorithms,such as proximal policy optimisation(PPO),have tried to increase data *** tionally,combining RL with transfer learning has been proposed in an effort to mitigate this *** this work,we further improve upon state-of-the-art transfer learning performance by incorporating demand response domain knowledge into the learning *** evaluate our approach on a demand response use case where peak shaving and self-consumption is incentivised by means of a capacity *** show our adapted version of PPO,combined with transfer learming,reduces cost by 14.51%compared to a regular hysteresis controller and by 6.68%compared to traditional PPO.

关键词： Demand response Reinforcement learning Electric water heater Peak shaving Transfer learning

Experimental and analytical investigation on friction resistance force between buried coated pressurized steel pipes and soil

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Frontiers of Structural and Civil Engineering 2024年第4期18卷 615-629页

作者： Shaurav ALAM Tanvir MANZUR John MATTHEWS chris BARTLETT Erez ALLOUCHE Brent KEIL John KRAFT Department of Civil Engineering and Construction Engineering Technology Louisiana Tech UniversityRustonLA 71270USA Department of Civil Engineering Bangladesh University of Engineering and TechnologyDhaka 1000Bangladesh Georgia Tech Research Institute AtlantaGA 30332USA Stantec Inc. Edmonton T5J0K4Canada North West Pipe Company VancouverWA 98684USA

This paper presents an analytical approach for estimating frictional resistance to pipe movement at soil and external pipe surface of buried coated pressurized steel pipes relative to the internal thrust *** proposed analytical method was developed based on 36 experiments,which involved three coating types(cement mortar(CM),polyurethane type-I(PT-I),prefabricated plastic tape(PPT))on pipes’surfaces,three different soils(pea-gravel(PG),sand(S),silty-clay(SC)),and four simulated over burden depths above the pipe’s *** showed frictional resistance decreased with increasing over burden depth above the pipe’s *** degree of frictional resistance at the pipe-soil interface was found to be in the order of PG>SC>S for all coating variations and overburden *** coated pipe buried in all three types of soil produced significantly higher frictional resistance as compared to other coating *** on experimental data,the developed analytical introduced a dimensionless factor“Z”,which included effects of types of coatings,soil,and overburden depths for simplified rapid *** showed that the method provided a better prediction of frictional resistance forces,in comparison to previous analytical methods,which were barely close in predicting friction resistance for different coating variations,soil types,and overburden *** resistance force values reported herein could be considered conservative.

关键词： friction resistance force thrust force coated pressurized steel pipe soil type overburden depth

弗吉尼亚邦联大学当代艺术学院美国弗吉尼亚州,里士满

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世界建筑导报 2020年第5期35卷 14-17页

作者： Steven Holl chris mcvoy Dominik Sigg Dimitra Tsachrelia Garrick Ambrose Rychiee Espinosa Scott Fredricks Gary He Martin Kropac JongSeo Lee Yasmin Vobis christina Yessios 史蒂文·霍尔建筑师事务所

该项目是位于弗吉尼亚州首府里士满,弗吉尼亚联邦大学校园边的新当代艺术院,它将周围社区与大学连接起来。坐落于里士满最繁华的Broad和Belvidere大街十字路口,该建筑以一种迷人的开放感成为进入大学的大门。主入口在表演空间和广场的... 详细信息

该项目是位于弗吉尼亚州首府里士满,弗吉尼亚联邦大学校园边的新当代艺术院,它将周围社区与大学连接起来。坐落于里士满最繁华的Broad和Belvidere大街十字路口,该建筑以一种迷人的开放感成为进入大学的大门。主入口在表演空间和广场的交叉路口,在“X-Y”的轴线上增加了一个垂直的“Z”方向元素。

关键词：弗吉尼亚州交叉路口里士满主入口当代艺术弗吉尼亚联邦大学表演空间十字路口

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休斯顿艺术博物馆美国德克萨斯州,休斯顿

世界建筑导报 2020年第5期35卷 10-13页

作者： Steven Holl chris mcvoy Olaf Schmidt Rychiee Espinosa Yiqing Zhao Filipe Taboada Xi Chen Suk Lee Maki Matsubayashi Elise Riley christopher Rotman Alfonso Simeo Yasmin Vobis 史蒂文·霍尔建筑师事务所

1)建筑采用“L”形,定义了校园空间的几何形状。它与整个校园相连,并提供了通往校园俯瞰平台的斜面。2)结构:所用的预制混凝土构件在德克萨斯州韦科制造而成,它们与主斜面的角度相结合支撑起地板并对外部进行定义。同时,还与野口勇(Isam... 详细信息

1)建筑采用“L”形,定义了校园空间的几何形状。它与整个校园相连,并提供了通往校园俯瞰平台的斜面。2)结构:所用的预制混凝土构件在德克萨斯州韦科制造而成,它们与主斜面的角度相结合支撑起地板并对外部进行定义。同时,还与野口勇(Isamo Noguchi)设计的雕塑花园墙壁相互呼应。3)“L”形建筑的入口位于主要内角处,通过结构的分解可以定义为:一个开放的空间设置了内旋的公共展览空间,可以垂直攀爬到屋顶的俯瞰平台上。

关键词：预制混凝土构件艺术博物馆德克萨斯州空间设置几何形状展览空间校园空间野口勇

Predictive modeling for post operative delirium in elderly

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World Journal of Gastrointestinal Oncology 2024年第9期16卷 3761-3764页

作者： chris B Lamprecht Abeer Dagra Brandon Lucke-Wold Lillian S.Wells Department of Neurosurgery University of FloridaGainevilleFL 32610United States

Delirium,a complex neurocognitive syndrome,frequently emerges following surgery,presenting diverse manifestations and considerable obstacles,especially among the *** editorial delves into the intricate phenomenon of postoperative delirium(POD),shedding light on a study that explores POD in elderly individuals undergoing abdominal malignancy *** study examines pathophysiology and predictive determinants,offering valuable insights into this challenging clinical *** the synthetic minority oversampling technique,a predictive model is developed,incorporating critical risk factors such as comorbidity index,anesthesia grade,and surgical *** is an urgent need for accurate risk factor identification to mitigate POD *** specific to elderly patients with abdominal malignancies,the findings contribute significantly to understanding delirium pathophysiology and *** research is warranted to establish standardized predictive for enhanced generalizability.

关键词： Post-operative delirium Elderly delirium Neurocognitive syndrome Neurotransmitters Abdominal malignancy Predictive model Synthetic minority oversampling technique

Proliferating Satellite Constellations Pose Astronomical and Environmental Challenges

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Engineering 2024年第5期36卷 9-11页

作者： chris Palmer Senior Technology Writer

On 6 October 2023,Amazon(Seattle,WA,USA)launched two prototype satellites into low-Earth orbit[1],the inaugural orbiters of Project Kuiper,a constellation of 3236 satellites that will work together to eventually deliver internet to tens of millions of customers *** Kuiper,named for the belt of ice,rock,and dwarf planets beyond Neptune,is smaller in number than the so-called mega-constellations built by SpaceX(Hawthorne,CA,USA),OneWeb(London,UK),and others,Amazon plans to loft its Kuiper satellites into orbit at a historic pace over the next few years.

关键词： Amazon eventually planet

Unprecedented JWST Observations Contest Cosmological Canons

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Engineering 2024年第6期37卷 6-9页

作者： chris Palmer Senior Technology Writer

After more than 18 months of nearly flawless operation,the James Webb Space Telescope(JWST)continues to deliver amazement,making unexpected discoveries,adding new wrinkles to known phenomena,and calling into question long-held theories of how the universe works.“The instruments are working amazingly well,in essentially all cases better than expected,”said Garth Illingworth,professor emeritus of astronomy and astrophysics at the University of California,Santa Cruz(CA,USA),and one of the three originators of the mission over three decades ago.“It has exceeded every one of its performance requirements,which is truly amazing when you think about how complex it is.”That complexity has included three decades of planning,design,and construction,followed by launch and maneuvering 1.5106 km from Earth to its second Lagrange(L2)orbit,unfolding and locking into position the 18 segments of its 6.5 m diameter main mirror,and deploying 8 motors,90 cables,and some 400 pulleys to unfurl its fragile sunshield[1,2].

关键词： universe Observation Cosmo

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对臭氧层造成破坏的违禁化学物质仍在增加

Engineering 2024年第4期35卷 7-9页

作者： chris Palmer Senior Technology Writer

As reported in a study published in April 2023,some of the globally banned chemicals that decimated the Earth’s ozone layer are still finding their way into the atmosphere[1].While unlikely to greatly impact global ozone levels,the continuing pollution has scientists concerned for two reasons:The chemicals,called chlorofluorocarbons(CFCs),are potent greenhouse gases,and,perhaps more worrying,the sources of the surprising emissions remain unidentified.

关键词： pollution ozone globally