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Drying Kinetics and Energy Consumption in Vacuum Drying Process with Microwave and Radiant Heating

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Chinese Journal of Chemical Engineering 2004年第6期12卷 809-813页

作者： M.Kamel J.I.Lombrana C.de Elvira R.Rodríguez Department of Chemical Engineering Facultad de Ciencias Universidad del Pais Vasco. Apdo. 644 48080 Bilbao SpainDepartment of Chemical Engineering Facultad de Ciencias Universidad del Pais Vasco. Apdo. 644 48080 Bilbao SpainInstituto del Frio (CSIC) Ciudad Universitaria. 28040 Madrid SpainDepartment of Chemical Engineering Facultad de Ciencias Universidad del Pais Vasco. Apdo. 644 48080 Bilbao Spain

The general objective of this work is to analyze energy input in a vacuum process with the incorporation of microwave heating. Thus, necessary criteria for designing an efficient freeze-drying operation are considered through the analysis of strategies based on the combination of different intensities of radiant and microwave *** other aim of this research topic is to study the kinetics of drying in relation to mass transfer *** freeze-drying strategies using both heating systems were used. Consequently, energy input could be related to diffusivity coefficients, temperature and pressure profiles during dehydration of the product and analyzed in comparison to a conventional freeze-drying process.

关键词：食品干燥微波辐射真空微波干燥干燥动力学能量扩散率

Production of the X(4014)as the Spin-2 Partner of X(3872)in e^(+)e^(-)Collisions

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Chinese Physics Letters 2024年第3期41卷 30-36页

作者： Pan-Pan Shi Vadim Baru Feng-Kun Guo Christoph Hanhart Alexey Nefediev CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Departamento de F′ısica Te′orica and IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigaci′on de PaternaAptdo.2208546071 ValenciaSpain Institut fur Theoretische Physik II Ruhr-Universitat BochumD-44780 BochumGermany Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China Institute for Advanced Simulation Institut fur Kernphysik and Julich Center for Hadron PhysicsForschungszentrum JulichD-52425 JulichGermany Jozef Stefan Institute Jamova 391000LjubljanaSlovenia CeFEMA Center of Physics and Engineering of Advanced MaterialsInstituto Superior T′ecnicoAvenida Rovisco Pais 11049-001 LisboaPortugal

In 2021,the Belle collaboration reported the first observation of a new structure in theψ(2S)γfinal state produced in the two-photon fusion *** the hadronic molecule picture,this new structure can be associatedwith the shallow isoscalar D*D* bound state and as such is an excellent candidate for the spin-2 partner of the X(3872)with the quantum numbers J^(PC)=2^(++)conventionally named X_(2).

关键词： process X(3872) Collisions

Engineering magnetic nanostructures with inverse hysteresis loops

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Nano Research 2016年第8期9卷 2347-2353页

作者： Beatriz Mora Nastassia Soriano Carolina Redondo Alberto Arteche David Navas Rafael Morales Dpto. de Quimica-Fisica Universidad del Pais Vasco UPWEHU 48940 Leioa Spain IFIMUP-IN and Dept. Fisica e Astronomia Universidade do Porto 4169007 Porto Portugal Dpto. de Qulmica-Ffsica & BCMaterials Universidad del Pals Vasco UPV/EHU 48940 Leioa Spain IKERBASQUE Basque Foundation for Science 48011 Bilbao Spain

Top-down lithography techniques allow the fabrication of nanostructured elements with novel spin configurations, which provide a new route to engineer and manipulate the magnetic response of sensors and electronic devices and understand the role of fundamental interactions in materials science. In this study, shallow nanostructure-patterned thin films were designed to present inverse magnetization curves, i.e., an anomalous magnetic mechanism characterized by a negative coercivity and negative remanence. This procedure involved a method for manipulating the spin configuration that yielded a negative coercivity after the patterning of a single material layer. Patterned NiFe thin films with trench depths between 15%-25% of the total film thickness exhibited inverse hysteresis loops for a wide angular range of the applied field and the trench axis. A model based on two exchange-coupled subsystems accounts for the experimental results and thus predicts the conditions for the appearance of this magnetic behavior. The findings of the study not only advance our understanding of patterning effects and confined magnetic systems but also enable the local design and control of the magnetic response of thin materials with potential use in sensor engineering.

关键词： magnetic nanostructures magnetic patterning effects inverted loops negative coercivity negative remanence

AN ALGEBRAIC METHOD FOR POLE PLACEMENT IN MULTIVARIABLE SYSTEMS

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Analysis in Theory and Applications 2001年第2期17卷 64-85页

作者： M. de la Sen (universidad del pais Vasco, spain) universidad del pais Vasco Spain

This paper considers the pole placement in multivariable systems involving known delays by using dynamic controllers subject to multirate sampling. The controller parameterizations are calculated from algebraic equations which are solved by using the Kronecker product of matrices. It is pointed out that the sampling periods can be selected in a convenient way for the solvability of such equations under rather weak conditions provided that the continuous plant is spectrally controllable. Some overview about the use of nonuniform sampling is also given in order to improve the system's performance.

关键词： AN ALGEBRAIC METHOD FOR POLE PLACEMENT IN MULTIVARIABLE SYSTEMS

Optimal thermoelectric figure of merit of Si/Ge core-shell nanowires

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纳米研究：英文版 2015年第8期8卷 2611-2619页

作者： Kaike Yang Andres Cantarero Angel Rubio Roberto D'Agosta Nano-Bio Spectroscopy Group and ETSF Scientific Development Center Departamento de Fisica de Materiales Universidad del Pais Vasco UPV/EHU San Sebastian 20018 Spain Instituto de Ciencia de Materiales Universidad de Valencia Valencia 46071 Spain Ikerbasque Basque foundation for Science Bilbao 48013 Spain

我们调查 Si 和 Ge nanowires 的热电的精力变换效率，并且特别地， Si/Ge 核心壳 nanowires 的。我们显示出 Si 核心 nanowire 上的薄 Ge 壳的存在怎么增加优点的全面数字。我们发现 Ge 壳的最佳的厚度为设备提供优点的最大的数字。我... 详细信息

我们调查 Si 和 Ge nanowires 的热电的精力变换效率，并且特别地， Si/Ge 核心壳 nanowires 的。我们显示出 Si 核心 nanowire 上的薄 Ge 壳的存在怎么增加优点的全面数字。我们发现 Ge 壳的最佳的厚度为设备提供优点的最大的数字。我们也认为 Ge core/Si 是壳 nanowires，并且证明 Si 壳的最佳的厚度不存在，自从优点的数字是 nanowire 的半径的 monotonically 减少的功能。最后，我们验证联系电子精力差距到最大化设备的效率的最佳的工作温度的实验法律。

关键词：热电系数纳米线硅锗核壳能量转换效率单调递减函数最佳工作温度最佳厚度

A PREDICTOR MODIFICATION TO THE EBDF METHOD FOR STIFF SYSTEMS

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Journal of Computational Mathematics 2011年第2期29卷 199-214页

作者： Elisabete Alberdi Juan Jose Anza Lea Artibai Ikastetxea Xemein Avenue 19 48270 Markina-Xemein (Vizcaya) Spain Department of Applied Mathematics ETS de Ingenieria de Bilbao Universidad del Pais Vasco Alameda de Urquijo s/n 48013 Bilbao Spain

In this paper we modify the EBDF method using the NDFs as predictors instead of BDFs. This modification, that we call ENDF, implies the local truncation error being smaller than in the EBDF method without losing too much stability. We will also introduce two more changes, called ENBDF and EBNDF methods. In the first one, the NDF method is used as the first predictor and the BDF as the second predictor. In the EBNDF, the BDF is the first predictor and the NDF is the second one. In both modifications the local truncation error is smaller than in the EBDF. Moreover, the EBNDF method has a larger stability region than the EBDF.

关键词： Backward differentiation formula (BDF) EBDF Predictor Stability Stiff Systems.

Interlayer Coupling in Co/Ti/（Gd-Co）/Ti Artificial Layered Ferrimagnet

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Chinese Physics Letters 2005年第12期22卷 3169-3172页

作者： A. V. Svalov A. Fernández V. O. Vas'kovskiy M. Tejedor R. Lopez Anton J. M. Barandiarán G. V. Kurlyandskaya Institute of Physics and Applied Mathematics Ural State University Lenin Avenue 51 620083 Ekaterinburg Russia Departamento de Fisica Universidad de Oviedo Avenida Calvo Sotelo s/n 33007 Oviedo Asturias Spain Departamento de Electricidad y Electronica Facultad de Ciencia y Tecnologia Universidad del Pais Vasco UPV/EHU PO Box 644 48080 Bilbao Spain

The magnetic properties and the structure of [Co/Ti/Gd0.36 Co0.64/Ti]4/Co multilayers are investigated by means of torque magnetometer, vibrating sample magnetometer and transverse magneto-optic Kerr effect （TMOKE） measurements and the atomic force microscopy. Due to interlayer exchange interaction, Co and Gd-Co layers form a macroscopic ferrimagnetic system. The change in the sign of the TMOKE hysteresis loops near the compensation temperature and field induced magnetic phase transitions are found. The latter can be characterized by a critical field which shows a linear variation with the temperature. The magnetic properties of these multilayers from many points of view are similar to those of bulk ferrimagnets.

关键词： THIN-FILMS MULTILAYERS

Tight-binding models for ultracold atoms in optical lattices：general formulation and applications

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Science China(Physics,Mechanics & Astronomy) 2016年第6期59卷 1-23页

作者： Michele Modugno Julen Ibanez-Azpiroz Giulio Pettini Departamento de Fisica Teorica e Historia de la Ciencia Universidad del Pais Vasco UPV/EHU Bilbao 48080 Spain IKERBASQUE Basque Foundation for Science Bilbao 48011 Spain Peter Griinberg Institute and Institute for Advanced Simulation Forschungszentrum Jiilich & JARA Jiilich D-52425 Germany Dipartimento di Fisica e Astronomia Universita di Firenze and INFN Sesto Fiorentino 50019 Italy

Tight-binding models for ultracold atoms in optical lattices can be properly defined by using the concept of maximally localized Wannier functions for composite bands. The basic principles of this approach are reviewed here, along with different applications to lattice potentials with two minima per unit cell, in one and two spatial dimensions. Two independent methods for computing the tight-binding coefficients—one ab initio, based on the maximally localized Wannier functions, the other through analytic expressions in terms of the energy spectrum—are considered. In the one dimensional case, where the tight-binding coefficients can be obtained by designing a specific gauge transformation, we consider both the case of quasi resonance between the two lowest bands, and that between s and p orbitals. In the latter case, the role of the Wannier functions in the derivation of an effective Dirac equation is also reviewed. Then, we consider the case of a two dimensional honeycomb potential, with particular emphasis on the Haldane model, its phase diagram, and the breakdown of the Peierls substitution. Tunable honeycomb lattices, characterized by movable Dirac points, are also considered. Finally, general considerations for dealing with the interaction terms are presented.

关键词：紧束缚模型超冷原子应用程序光晶格狄拉克方程公式通用解析表达式

POLE PLACEMENT CONTROLLERS FOR LINEAR TIME-delAY SYSTEMS WITH COMMENSURATE POINT delAYS

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Analysis in Theory and Applications 2004年第4期20卷 358-372页

作者： M. de la Sen Department of Systems Engineering and Automatic Control Instituto de Investigaction y Desarrollo de Procesos. IIDP Facultad de Ciencias. universidad del pais Vasco Leioa (Bizkaia). Aptdo. 644 de Bilbao 48080-Bilbao spain

This paper investigates the exact and approximate spectrum assignment properties associated with realizable output-feedback pole-placement type controllers for single-input single-output linear time-invariant time-delay systems with commensurate point delays. The controller synthesis problem is discussed through the solvability of a set of coupled diophantine equations of polynomials. An extra complexity is incorporated to the above design to cancel extra unsuitable dynamics being generated when solving the above diophantine equations. Thus, the complete controller tracks any arbitrary prefixed (either finite or delay-dependent) closed-loop spectrum. However, if the controller is simplified by deleting the above mentioned extra complexity, then the robust stability and approximated spectrum assignment are still achievable for a certain sufficiently small amount of delayed dynamics. Finally, the approximate spectrum assignment and robust stability problems are revisited under plant disturbances if the nominal controller is maintained. In the current approach, the finite spectrum assignment is only considered as a particular case to the designer's choice of a (delay-dependent) arbitrary spectrum assignment objective.

关键词： pole placement controller linear time-delay system controller synthesis problem