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Prognostic factors and time-related changes influence results of colorectal liver metastases surgical treatment:A single-center analysis

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World Journal of Gastroenterology 2009年第21期15卷 2587-2594页

作者： josep Martí María Marta Modolo josep Fuster Jaume Comas Rebeca Cosa Joana Ferrer Victor Molina Juan Romero Constantino Fondevila Ramón Charco Juan Carlos García-Valdecasas Liver Surgery and Transplantation Unit IMDiMIDIBAPSHospital ClinicCIBERehdUniversity of Barcelona

AIM:To analyze the prognostic factors involved in survival and cancer recurrence in patients undergoing surgical treatment for colorectal liver metastases(CLM) and to describe the effects of time-related changes on survival and recurrence in these ***:From January 1994 to January 2006,236 patients with CLM underwent surgery with the aim of performing curative resection of neoplastic disease at our institution and 189(80%) of these patients underwent resection of CLM with curative ***,intraoperative and postoperative data,including primary tumor and CLM pathology results,were retrospectively *** were divided into two time periods:a first period from January 1994 to January 2000(n = 93),and a second period from February 2000 to January 2006(n = 143).RESULTS:Global survival at 1,3 and 5 years in patients undergoing hepatic resection was 91%,54% and 47%,*** with preoperative extrahepatic disease,carcinoembryonic antigen(CEA) levels over 20 ng/dL,more than four nodules or extrahepatic invasion at pathological analysis had worse *** recurrence rate at 1 year was 48.3%,being more frequent in patients with preoperative and pathological extrahepatic disease and CEA levels over 20 ng/*** patients in the second time period had more adverse prognostic factors,no differences in overall survival and recurrence were observed between the two ***:Despite advances in surgical technique and better adjuvant treatments and preoperative imaging,careful patient staging and selection is crucial to continue offering a chance of cure to patients with CLM.

关键词： Liver metastases Colorectal cancer Hepatic resection Survival Prognostic factors

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Robust Switch Selection in Radial Distribution Systems Using Combinatorial Optimization

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CSEE Journal of Power and Energy Systems 2022年第3期8卷 933-940页

作者： Hani Mavalizadeh Omid Homaee Reza Dashti josep M.Guerrero Hassan Haes Alhelou Pierluigi Siano Fanavaran Moj Khatam Tehran 16844Iran School of Electrical Engineering Iran University of Science and TechnologyTehran 16844Iran School of Advanced Technologies Iran University of Science and TechnologyTehran 16844Iran Department of Energy Technology Aalborg UniversityAalborg 9220Denmark Department of Electrical Power Engineering Faculty of Mechanical and Electrical EngineeringTishreen UniversityLattakia 2230Syria Department of Management&Innovation Systems University of SalernoFisciano 84084Italy

Selecting the best type of equipment among available switches with different prices and reliability levels is a significant challenge in distribution system *** this paper,the optimal type of switches in a radial distribution system is selected by considering the total cost and reliability criterion and using the weighted augmented epsilon constraint method and combinatorial optimization.A new index is calculated to assess the robustness of each Pareto ***,for each failure,repair time is considered based on historical *** Carlo simulations are used to consider the switch failure uncertainty and fault repair time uncertainty in the *** proposed framework is applied to an RTBS Bus-2 test ***,the model is also applied to an industrial system to verify the proposed method’s excellent performance in larger practical engineering problems.

关键词： Combinatorial optimization Monte Carlo Simulation multi-objective optimization radial distribution system reliability robustness

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Proline as a biochemical marker in relation to the ecology of two halophytic Juncus species

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Journal of Plant Ecology 2013年第2期6卷 177-186页

作者： Monica Boscaiu Cristina Lull josep Llinares Oscar Vicente Herminio Boira Instituto Agroforestal Mediterráneo(IAM UPV)Universitat Politècnica de ValènciaCamino de Vera s/n46022 ValenciaSpain RE-FOREST Departamento de Ingeniería Hidráulica y Medio AmbienteUniversitat Politècnica de ValènciaCamino de Vera s/n46022 ValenciaSpain Instituto de Investigación para la Gestión Integral de Zonas Costeras(IGIC UPV)Universitat Politècnica de ValènciaCalle Paranimf 146730 Grau de GandíaValenciaSpain Instituto de Biología Molecular y Celular de Plantas(IBMCP UPV-CSIC)Universitat Politècnica de ValènciaCamino de Vera s/n46022 ValenciaSpain

Aims osmolytes,used for maintaining osmotic balance and as‘osmoprotectants’,are synthesized in plants as a general,con-served response to abiotic stress,although their contribution to stress-tolerance mechanisms remains ***,the most common osmolyte,accumulates in many plant species in parallel with increased external salinity and is considered a reliable bio-chemical marker of salt *** have measured proline levels in two halophytic,closely related Juncus species under laboratory and field conditions to assess the possible relevance of proline biosynthesis for salt tolerance and therefore for the ecology of these two *** Proline was quantified in plants treated with increasing NaCl con-centrations and in plants sampled in two salt marshes located in the provinces of Valencia and alicante,respectively,in southeast *** conductivity,pH,Na+and Cl−concentrations were measured in soil samples collected in parallel with the plant *** Findings Treatment with NaCl inhibited growth of *** plants in a concentration-dependent manner,but only under high salt conditions for *** treatments led to proline accumulation in both species,especially in the more salt-tolerant *** results,obtained under laboratory conditions,were confirmed in plants sam-pled in the *** all the samplings,proline contents were signifi-cantly lower in *** than in the more tolerant *** growing in the same *** direct correlation between soil salinity and proline levels could be established,but seasonal variations were detected,with increased proline contents under accentuated water deficit *** results suggest that proline biosynthesis is not only an induced,general response to salt stress but also an important contributing factor in the physiological mechanisms of salt tolerance in Juncus,and that it therefore correlates with the ecology of both species.

关键词： halophytes Juncus acutus Juncus maritimus osmolytes salt stress

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Inertial PLL of Grid-connected Converter for Fast Frequency Support

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CSEE Journal of Power and Energy Systems 2023年第4期9卷 1594-1599页

作者： Xiang Guo Donghai Zhu Jiabing Hu Xudong Zou Yong Kang josep M.Guerrero State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China. Department of Energy Technology Aalborg UniversityAalborg 9220Denmark

Frequency support capability for the grid-connected converter(GCC)is one of the basic safeguards for the stability of renewables-dominated power *** this paper,analogous to the motion equation of a synchronous generator(SG),an inertial phase-locked loop(iPLL)is proposed for GCC to achieve fast frequency *** iPLL introduces the inertial and damping loops into the classic PLL structure to emulate the natural frequency regulation characteristics of a *** with the existing methods,the iPLL has a faster frequency response and is simpler in design and ***,the proposed iPLL method is validated by *** Terms-Frequency support,grid-connected converter,inertial phase-locked loop(iPLL),synchronous generation(SG).

关键词： Frequency support grid-connected converter inertial phase-locked loop(iPLL) synchronous generation(SG).

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Transient Characteristics and Quantitative Analysis of Electromotive Force for DFIG-based Wind Turbines during Grid Faults

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Chinese Journal of Electrical Engineering 2022年第2期8卷 3-12页

作者： Yumei Ma Donghai Zhu Xudong Zou Yong Kang josep M.Guerrero Key Laboratory of Power Electronics and Energy Management for Ministry of Education of China Huazhong University of Science and TechnologyWuhan 430074China Department of Energy Technology Aalborg UniversityAalborg 9220Denmark

For doubly-fed induction generator(DFIG)-based wind turbines(WTs),various advanced control schemes have been proposed to achieve the low voltage ride through(LVRT)capability,whose parameters design is significantly reliant on the rotor electromotive force(EMF)of DFIG-based ***,the influence of the rotor current on EMF is usually ignored in existing studies,which cannot fully reflect the transient characteristics of *** tackle with this issue,this study presents a comprehensive and quantitative analysis of EMF during grid faults considering various control ***,the DFIG model under grid faults is ***,the transient characteristics of EMF are analyzed under different control modes(that is,rotor open-circuit and connected to converter).Furthermore,the EMF transient eigenvolumes(that is,accessorial resistance item,transient decay time constant,and frequency offset)are quantitatively analyzed with the typical parameters of MW-level DFIG-based *** analysis results contribute to the design of the LVRT control ***,the analysis is validated by the hardware-in-the-loop experiments.

关键词： Doubly-fed induction generator(DFIG) electromotive force(EMF) quantitative analysis transient characteristics wind turbines(WTs) grid faults

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Analysis and Control of Modular Multi-terminal DC Power Flow Controller with Fault Current Limiting Function

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Journal of Modern Power Systems and Clean Energy 2021年第6期9卷 1375-1385页

作者： Qianming Xu Xinyu Huang Xu Chu Mingshen Li Zhikang Shuai Chunming Tu josep M.Guerrero College of Electrical and Information Engineering Hunan University Department of Energy Technology Aalborg University

In order to overcome the problems of power flow control and fault current limiting in multi-terminal high voltage direct current(MTDC)grids,this paper proposes a modular multi-terminal DC power flow controller(MM-DCPFC)with fault current limiting *** topology structure,operation principle,and equivalent circuit of MM-DCPFC are introduced,and such a structure has the advantages of modularity and *** power balance mechanism is studied and a hierarchical power balance control strategy is *** results show that MM-DCPFC can achieve internal power exchange,which avoids the use of external power *** fault characteristics of MM-DCPFC are analyzed,fault current limiting and self-protection methods are proposed,and the factors affecting the current limiting capability are *** simulation models are established in PLECS,and the simulation results verify the effectiveness of MM-DCPFC in power flow control,fault current limiting,and *** addition,a prototype is developed to validate the function and control method of MM-DCPFC.

关键词： Fault current limiting multi-terminal high volt-age direct current(MTDC)grid power balance DC power flow controller

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Role of seed size, phenology, oogenesis and host distribution in the specificity and genetic structure of seed weevils (Curculio spp.) in mixed forests

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Integrative Zoology 2018年第3期13卷 267-279页

作者： Harold ARIAS-LECLAIRE Raúl BONAL Daniel GARCÍA-LÓpeZ josep Maria ESpeLTA CREAF Centre for Ecological Research and Forestry ApplicationsCerdanyola del Vallès08193Spain Exact and Natural Sciences School State Distance University of Costa RicaUNEDMercedes de Montes de OcaSan JoséCosta Rica Forest Research Group INDEHESAUniversity of ExtremaduraPlasenciaSpain DITEG Research Group University of Castilla-La ManchaToledoSpain Zoology Department Autonomous University of BarcelonaCerdanyola del VallèsSpain

Synchrony between seed growth and oogenesis is suggested to largely shape trophic breadth of seed-feeding insects and ultimately to contribute to their co-existence by means of resource partitioning or in the time when infestation *** we investigated:(i)the role of seed phenology and sexual maturation of females in the host specificity of seed-feeding weevils(Curculio spp.)predating in hazel and oak mixed forests;and(ii)the consequences that trophic breadth and host distribution have in the genetic structure of the weevil *** analyses were used to establish unequivocally host specificity and to determine the population genetic *** identified 4 species with different specificity,namely Curculio nucum females matured earlier and infested a unique host(hazelnuts,Corylus avellana)while 3 species(Curculio venosus,Curculio glandium and Curculio elephas)predated upon the acorns of the 2 oaks(Quercus ilex and Quercus pubescens).The high specificity of *** coupled with a more discontinuous distribution of hazel trees resulted in a significant genetic structure among *** addition,the presence of an excess of local rare haplotypes indicated that *** populations went through genetic expansion after recent ***,these effects were not observed in the more generalist Curculio glandium predating upon ***,co-existence of weevil species in this multi-host-parasite system is influenced by both resource and time *** what extent the restriction in gene flow among *** populations may have negative consequences for their persistence in a time of increasing disturbances(*** in Mediterranean areas)deserves further research.

关键词： Corylus avellana Curculio spp. genetic structure Quercus spp. trophic breadth

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Energy Management Strategy Considering Multi-time-scale Operational Modes of Batteries for the Grid-connected Microgrids Community

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CSEE Journal of Power and Energy Systems 2020年第1期6卷 111-121页

作者： Xiaowen Xing Lili Xie Hongmin Meng Xin Guo Lei Yue josep M.Guerrero Department of Electrical Engineering Northwestern Polytechnical UniversityXi’an 710072China State Grid Information and Telecommunication Group Ltd.Co. Beijing 102211China State Grid Beijing Fengtai Electric Power Supply Company Beijing 100073China China Electric Power Research Institute Beijing 100192China Department of Energy Technology Aalborg UniversityAalborg9220Denmark

The advantages and promoting applications of the microgrids community(MGC)allows for a critical step being taken toward a smart *** energy management strategy(EMS)is essential to intelligently coordinate the operations of the *** paper presents a multi-time-scale EMS consid-ering battery operational modes for grid-connected *** proposed strategy consists of two modules:day-ahead integrated optimization and realtime distributed *** first module aims to minimize the operational cost of the MGC considering battery free-overcharging *** problem is solved by the mixed integer linear programming(MILP)sim-ulating two charging/discharging modes:limited-current mode and constant-voltage *** second module is installed in local MGs to correct the optimizing deviations of the day-ahead static scheduling,which are caused by predicting errors of renewable energy and *** main contribution of this work is integrating the advantages of global optimization of the centralized method and the fast computing speed of the distributed *** results prove the proposed EMS is feasible and *** computing time at each updating step is reduced by 75%on average,which has the potential to be adopted in engineering.

关键词： Day-ahead optimization energy management strategy forecast errors microgrids community realtime compensation strategy

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When the sum adds up:Using public procurement to avoid intersectoral cooperation barriers in lagging regions

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International Journal of Innovation Studies 2023年第4期7卷 291-300页

作者： Celia Díaz-Catalán josep Lobera Department of Sociology:Methods and Theory of the Universidad Complutense de Madrid Spain Department of Sociology Universidad Autonoma de MadridSpain

This study examined the application of an instrument that supports intersectoral collaboration in *** the strategic action field(SAF)approach,we analyze a precommercial public procurement instrument developed in Andalusia(Spain).Drawing on qualitative and quantitative data,we shed light on the dynamics of collaboration between public and private innovation *** show how a change in dynamics can generate a reduction in barriers to intersectoral *** presents an opportunity to promote the transfer of knowledge and strengthen a strategic field of action,such as the agroindustry,which is the main source of income for several people in Andalusia,a European region that is developmentally lagging.

关键词： Pre-commercial public procurement Innovation Regional innovation system Valley of death

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Geotechnical particle finite element method for modeling of soilstructure interaction under large deformation conditions

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第3期14卷 967-983页

作者： josep Maria Carbonell Lluís Monforte Matteo O.Ciantia Marcos Arroyo Antonio Gens MECAMAT Group Department of EngineeringFaculty of Science and TechnologyUniversitat de Vic-Universitat Central de Catalunya(UVic-UCC)VicSpain Centre Internacional de Mètodes Numèrics a l'Enginyeria(CIMNE) BarcelonaSpain School of Science and Engineering University of DundeeDundeeUK Universitat Politècnica de Cataluna-BarcelonaTech BarcelonaSpain

The possibilities of the particle finite element method(PFEM)for modeling geotechnical problems are increasingly *** is a numerical approach to solve large displacement and large strain continuum problems that are beyond the capabilities of classical finite element method(FEM).In PFEM,the computational domain is reconfigured for optimal solution by frequent remeshing and boundary *** inherits many concepts,such as a Lagrangian description of continuum,from classic geomechanical *** familiarity with more popular numerical methods facilitates learning and *** work focuses on G-PFEM,a code specifically developed for the use of PFEM in geotechnical *** article has two *** first is to give the reader an overview of the capabilities and main features of the current version of the G-PFEM and the second is to illustrate some of the newer developments of the code.G-PFEM can solve coupled hydro-mechanical static and dynamic problems involving the interaction of solid and/or deformable *** constitutive models for geomaterials are available,including features,such as structure and destructuration,which result in brittle *** solutions are robust,solidly underpinned by numerical technology including mixedfield formulations,robust and mesh-independent integration of elastoplastic constitutive models and a rigorous and flexible treatment of contact *** novel features presented in this work include the contact domain technique,a natural way to capture contact interactions and impose contact constraints between different continuum bodies,as well as a new simplified formulation for dynamic impact *** code performance is showcased by the simulation of several soil-structure interaction problems selected to highlight the novel code features:a rigid footing insertion in soft rock,pipeline insertion and subsequent lateral displacement on over-consolidated clay,screw-pile pull-out and the dyn

关键词： Particle finite element method(PFEM) Structured soils Nonlocal elastoplasticity Contact domain method Soil penetration problems

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