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图书与石油科技信息 1997年第3期11卷 17-22页

作者： f.schneider 蒋录全四川石油管理局地调处研究所南充63700

本文论述了沉积盆地模拟时,对压实作用引起的沉积物的几何变形所进行的研究。在一定的假设条件下,提出了不同压实作用下的四个地质层段(沉积柱),通过孔隙度与有效应力间的关系来定量描述压实作用机理。给出了相应的方程,最后通过与土壤... 详细信息

本文论述了沉积盆地模拟时,对压实作用引起的沉积物的几何变形所进行的研究。在一定的假设条件下,提出了不同压实作用下的四个地质层段(沉积柱),通过孔隙度与有效应力间的关系来定量描述压实作用机理。给出了相应的方程,最后通过与土壤力学,岩石力学及水文地质学中对压实作用研究结果的对比,对文中所得结论进行了讨论。

关键词：沉积盆地模拟孔隙度有效应力

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用激光分光计测量稳定氪的光学同位素位移

光学学报 1983年第5期 431-435页

作者：张诏祥,W.Makat,f.schneider 西北大学物理系西柏林自由大学西柏林自由大学

本文简单介绍用计算机程序控制的光谱范围在400～700nm的激光分光计.用此分光计测量了氪波长432nm,436nm和557nm的光学跃迁无多普勒效应的同位素位移,并用金（King）图检验实验数据.结果是十分满意的.从所测量的同位素位移值,推算出稳... 详细信息

本文简单介绍用计算机程序控制的光谱范围在400～700nm的激光分光计.用此分光计测量了氪波长432nm,436nm和557nm的光学跃迁无多普勒效应的同位素位移,并用金（King）图检验实验数据.结果是十分满意的.从所测量的同位素位移值,推算出稳定氪的平均平方核电荷半径变化δ〈γ2〉.

关键词：同位素位移跃迁同位素漂移谱线位移分光计激光光学

立方型La1-xSrxCoO3晶面电子结构及热力学稳定性的第一原理计算研究

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立方型La1-xSrxCoO3晶面电子结构及热力学稳定性的第一原理计算研...

APPROXIMATING THE STATIONARY BELLMAN EQUATION BY HIERARCHICAL TENSOR PRODUCTS

第30届全国化学与物理电源学术年会

作者：张曙光孟秀霞杨乃涛孟波谭小耀 William f.schneider 山东理工大学化工学院上海交通大学化学工程系天津工业大学化学工程系 Department of Chemical and Biomolecular Engineering University of Notre Dame

用于中温SOfCs的高反应活性阴极材料的合理设计仍是目前新能源材料研究领域的一个重大挑战。为了实现这一目标,迫切需要考察阴极材料表面催化活性与其化学组成及微观结构之间的关系。尽管多种电化学、原位实验技术已经被用来研究阴极性... 详细信息

用于中温SOfCs的高反应活性阴极材料的合理设计仍是目前新能源材料研究领域的一个重大挑战。为了实现这一目标,迫切需要考察阴极材料表面催化活性与其化学组成及微观结构之间的关系。尽管多种电化学、原位实验技术已经被用来研究阴极性能,但由于该问题的复杂性,表面氧还原反应、氧离子在阴极本体传输的详细过程仍未弄清楚。众所周知,第一原理计算可以得到诸如电子结构、几何参数、势能面、过渡态及反应

关键词：非金属阴极材料电子结构表面稳定性热力学

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Journal of Computational Mathematics 2024年第3期42卷 638-661页

作者： Mathias Oster Leon Sallandt Reinhold schneider Technische Universität Berlin Strasse des 17.Juni 13510623 BerlinGermany

We treat infinite horizon optimal control problems by solving the associated stationary Bellman equation numerically to compute the value function and an optimal feedback *** dynamical systems under consideration are spatial discretizations of non linear parabolic partial differential equations(PDE),which means that the Bellman equation suffers from the curse of *** non linearity is handled by the Policy Iteration algorithm,where the problem is reduced to a sequence of linear equations,which remain the computational bottleneck due to their high *** reformulate the linearized Bellman equations via the Koopman operator into an operator equation,that is solved using a minimal residual *** the Koopman operator we identify a preconditioner for operator equation,which deems essential in our numerical *** overcome computational infeasability we use low rank hierarchical tensor product approximation/tree-based tensor formats,in particular tensor trains(TT tensors)and multi-polynomials,together with high-dimensional quadrature,*** controlling a destabilized version of viscous Burgers and a diffusion equation with unstable reaction term numerical evidence is given.

关键词： feedback control Dynamic programming Hamilton-Jacobi-Bellman Tensor product approximation Variational Monte-Carlo

Genomic basis of evolutionary adaptation in a warm-blooded fish

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The Innovation 2022年第1期3卷 22-30页

作者： Xin Wang Meng Qu Yali Liu Ralf f.schneider Yue Song Zelin Chen Hao Zhang Yanhong Zhang Haiyan Yu Suyu Zhang Dongxu Li Geng Qin Shaobo Ma Jia Zhong Jianping Yin Shuaishuai Liu Guangyi fan Axel Meyer Dazhi Wang Qiang Lin CAS Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Marine Evolutionary Ecology GEOMAR Helmholtz Centre for Ocean Research Kiel24105 KielGermany BGI-Qingdao Qingdao 266555China State Key Laboratory of Marine Environmental Science/College of the Environment and Ecology Xiamen UniversityXiamen 361102China BGI-Shenzhen Shenzhen 518083China Department of Biology University of KonstanzKonstanz 78464Germany University of the Chinese Academy of Sciences Beijing 100101China Laboratory for Marine fisheries Science and food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

few fishes have evolved elevated body temperatures compared with ambient temperatures,and only in opah(Lampris spp)is the entire body *** understand the molecular basis of endothermy,we analyzed the opah genome and identified 23 genes with convergent amino acid substitutions across fish,birds,and mammals,including slc8b1,which encodes the mitochondrial Na+/Ca2+exchanger and is essential for heart function andmetabolic heat *** endothermic fishes,44 convergent genes with suggestive metabolic functions were identified,such as glrx3,encoding a crucial protein for hemoglobin *** genes involved in the production and retention of metabolic heat were also found to be under positive *** of opah’s unique inner-heat-producing pectoral muscle layer(PMI),an evolutionary key innovation,revealed that many proteins were co-opted from dorsal swimming muscles for thermogenesis and oxidative ***,the opah genome provides valuable resources and opportunities to uncover the genetic basis of thermal adaptations in fish.

关键词： evolutionary fish convergent

Reversible hydrogenation restores defected graphene to graphene

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Science China Chemistry 2021年第6期64卷 1047-1056页

作者： Lin Jiang Pauline MGvan Deursen Hadi Arjmandi-Tash Liubov ABelyaeva Haoyuan Qi Jiao He Vincent Kofman Longfei Wu Valery Muravev Ute Kaiser Harold Linnartz Emiel JMHensen Jan PHofmann Grégory fschneider Leiden Institute of Chemistry Leiden UniversityEinsteinweg 552333CC LeidenThe Netherlands Central facility for Electron Microscopy Electron Microscopy Group of Materials ScienceUlm UniversityAlbert-Einstein-Allee 11Ulm 89081Germany Laboratory for Astrophysics Leiden ObservatoryLeiden UniversityNiels Bohrweg 22333 CA LeidenThe Netherlands Laboratory for Inorganic Materials and Catalysis Department of Chemical Engineering and ChemistryEindhoven University of TechnologyP.O.Box 5135600 MB EindhovenThe Netherlands Center for Advancing Electronics Dresden(cfaed)and faculty of Chemistry and food Chemistry Technical University of Dresden010069 DresdenGermany

Graphene as a two-dimensional material is prone to hydrocarbon contaminations,which can significantly alter its intrinsic electrical ***,we implement a facile hydrogenation-dehydrogenation strategy to remove hydrocarbon contaminations and preserve the excellent transport properties of monolayer *** electron microscopy we quantitatively characterized the improved cleanness of hydrogenated graphene compared to untreated *** situ spectroscopic investigations revealed that the hydrogenation treatment promoted the adsorption of water at the graphene surface,resulting in a protective layer against the re-deposition of hydrocarbon ***,the further dehydrogenation of hydrogenated graphene rendered a more pristine-like basal plane with improved carrier mobility compared to untreated pristine *** findings provide a practical post-growth cleaning protocol for graphene with maintained surface cleanness and lattice integrity to systematically carry a range of surface chemistry in the form of a well-performing and reproducible transistor.

关键词： graphene reversible hydrogenation surface cleanness in situ spectroscopy transistors

Modeling displacement flow inside a full-length casing string for well cementing

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Petroleum Research 2024年第1期9卷 1-16页

作者： Hu Dai Ali Eslami Jason schneider Gefei Liu fred Schwering Pegasus Vertex Inc.USA Laval University Canada Sanjel Energy Services Canada Athabasca Oil Corporation Canada

While computer modeling of annular displacement efficiency is widely applied in cementing engineering,modeling the displacement flow inside a casing or drill string for cementing operations has received less *** predicting displacement efficiency inside a full-length pipe is desired by cementing engineers,the attempt of developing a model with both efficiency and accuracy faces *** to computer simulators for this purpose is *** with annular flow,the displacement flow inside pipe,although within a simpler geometry and without eccentricity effect,is not simpler in physics,modelling strategy and predictability,because a variety of flow patterns and flow instabilities can develop to create complicated fluid *** this paper,we present an integrated numerical model developed to simulate displacement flows inside a full-length pipe,which connects an existing annulus model to enable complete displacement simulations of cementing *** model uses three-dimensional grid to solve fluid concentrations with degrees of mixing,and incorporates flow instability detection and flow regime *** in cementing,the model accounts for effects of pumping rate,well inclination,pipe rotation,fluid densities,rheological parameters and *** computationally efficient model does not rely on high-resolution mesh as often required by conventional Computational fluid Dynamics models,thus it is suitable to be implemented in a cementing software for daily use by well cementing *** methodology of the model is discussed in detail in this *** validate the model,we examine simulation results against experimental results obtained in our laboratory tests and CfD simulations;acceptable agreement is found under different testing *** also presented two case studies of real cementing jobs with cement evaluation logs compared to simulation results,showing that the model can predict consistent displacement efficie

关键词： Inside pipe displacement Displacement efficiency Numerical model Primary cementing Displacement flow

Two-photon emission from a superlattice-based superconducting light-emitting structure

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Light(Science & Applications) 2024年第7期13卷 1331-1340页

作者： Shlomi Bouscher Dmitry Panna Ronen Jacovi fauzia Jabeen Christian schneider Sven Höfling Alex Hayat Department of Electrical Engineering TechnionHaifa 32000Israel. Technische Physik Universität WürzburgAm HublandD-97074 WürzburgGermany. Institute of Physics Carl von Ossietzky Universität OldenburgD-26111 OldenburgGermany

Superconductor-semiconductor hybrid devices can bridge the gap between solid-state-based and photonics-based quantum systems,enabling new hybrid computing schemes,offering increased scalability and *** example for a hybrid device is the superconducting light-emitting diode(SLED).SLEDs have been theoretically shown to emit polarization-entangled photon pairs by utilizing radiative recombination of Cooper ***,the twophoton nature of the emission has not been shown experimentally *** demonstrate two-photon emission in a GaAs/AlGaAs *** electroluminescence spectra reveal unique two-photon superconducting features below the critical temperature(Tc),while temperature-dependent photon-pair correlation experiments(g(2)(τ,T))demonstrate temperature-dependent time coincidences below Tc between photons emitted from the *** results pave the way for compact and efficient superconducting quantum light sources and open new directions in light-matter interaction studies.

关键词： photon quantum utilizing

femoral Access with Ultrasound-Guided Puncture and Z-Stitch Hemostasis for Adults with Congenital Heart Diseases Undergoing Electrophysiological Procedures

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Congenital Heart Disease 2024年第1期19卷 85-92页

作者： fu Guan Matthias Gass florian Berger Heiko schneider firat Duru Thomas Wolber Arrhythmia and Electrophysiology Division Department of CardiologyUniversity Heart Center ZurichZurichSwitzerland Children’s Research Center Zurich University Children’s HospitalZurichSwitzerland Center for Integrative Human Physiology University of ZurichZurichSwitzerland

Aims:Although the application of ultrasound-guided vascular puncture and Z-stitch hemostasis to manage femoral access has been widely utilized,there is limited data on this combined application in adult congenital heart disease(ACHD)patients undergoing electrophysiological(EP)*** sought to evaluate the safety and efﬁcacy of ultrasound-guided puncture and postprocedural Z-stitch hemostasis for ACHD patients under-going EP *** and Results:The population of ACHD patients undergoing transfemoral EP pro-cedures at the University of Zurich Heart Center between January 2019 and December 2022 was observed and *** the study period,femoral access(left/right,arterial/venous)was performed under real-time ultrasound *** the end of the procedure,a single Z-stitch was performed at the puncture *** eval-uated the incidence of in-hospital complications associated with femoral access puncture in this *** 101 patients who had a total of 147 previous ipsilateral vascular punctures(mean 1.5 per person),100 patients underwent successful femoral vascular access for EP *** median age of the patients was 47±15 years and 34(34%)were male.Z-stitches were performed after the procedure in 100 patients with 303 femoral vascular accesses(mean 3 punctures per person).No patient developed vascular puncture relevant inguinal hematoma,pseudo aneurysm,arteriovenousﬁstula,venous or arterial ***:In ACHD patients undergoing EP procedures,optimal femoral access management can be achieved with ultra-sound-guided puncture and postprocedural Z-stitch hemostasis.

关键词： Congenital heart disease cardiac electrophysiology cardiac catheterization femoral access hemostasis