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Exponential Continuous Non-Parametric Neural Identifier With Predefined Convergence Velocity

IEEE/CAA Journal of Automatica Sinica 2022年第6期9卷 1049-1060页

作者： mariana ballesteros Rita Q.Fuentes-Aguilar Isaac Chairez Instituto Politécnico Nacional Centro de Innovación y Desarrollo Tecnológico en Cómputo Unidad Profesional Interdisciplinaria de Biotecnología 07340Mexico CityMexico Tecnológico de Monterrey School of Engineering and SciencesZapopanJalisco 45138Mexico Department of Bioprocesses UPIBIInstituto Politécnico Nacional07340Mexico City

This paper addresses the design of an exponential function-based learning law for artificial neural networks(ANNs)with continuous *** ANN structure is used to obtain a non-parametric model of systems with uncertainties,which are described by a set of nonlinear ordinary differential *** novel adaptive algorithms with predefined exponential convergence rate adjust the weights of the *** first algorithm includes an adaptive gain depending on the identification error which accelerated the convergence of the weights and promotes a faster convergence between the states of the uncertain system and the trajectories of the neural *** second approach uses a time-dependent sigmoidal gain that forces the convergence of the identification error to an invariant set characterized by an *** generalized volume of this ellipsoid depends on the upper bounds of uncertainties,perturbations and modeling *** application of the invariant ellipsoid method yields to obtain an algorithm to reduce the volume of the convergence region for the identification *** adaptive algorithms are derived from the application of a non-standard exponential dependent function and an associated controlled Lyapunov *** examples demonstrate the improvements enforced by the algorithms introduced in this study by comparing the convergence settings concerning classical schemes with non-exponential continuous learning *** proposed identifiers overcome the results of the classical identifier achieving a faster convergence to an invariant set of smaller dimensions.

关键词： Exponential Lyapunov functions learning laws non-parametric identifier predefined convergence rate

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Output Second-order Sliding-mode Control for a Gecko Biomimetic Climbing Robot

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Journal of Bionic Engineering 2019年第4期16卷 633-646页

作者： David Cruz-Ortiz mariana ballesteros-Escamilla Isaac Chairez Alberto Luviano SEPl UPIITAInstitute Politecnico NationalAv.Institute Politecnico National 258007340Mexico Bioprocesses Department UPIBIInstitute Politecnico NationalAv.Acueducto 55007340Mexico

The aim of this study is to propose the output controller to solve the execution of the gait sequence for Gecko Bio-inspired Robotic Devices (GBRDs).The Twisting Controller (TC) serves as basis of the tracking trajectory designed *** TC uses both the tracking error and its estimated derivative,which is calculated by a set of distributed Super-Twisting Algorithms (STAs).Each STA is implemented as a robust and exact *** output-based controller structure corresponds to a sort of decentralized form for robotic ***,each articulation is controlled by an independent TC.A set of proposed references trajectories reproduce the gait cycle of a Real Gecko-Lizard (RG-L).The reference trajectories are proposed as the superposition of sigmoid functions ful-filling the conditions of the Bezzier *** simulations evaluate the GBRD movement enforced by the suggested controller in the horizontal as well as the vertical *** own 3D printed GBRD is the experimental platform aimed to test the distributed *** controlled vacuum pumps are used to adhere the GBRD to the wall surfaces.A set of experimental validations confirm the robustness and the reliability of the proposed controller when its performance is compared with classical output feedback controllers.

关键词： gecko robot biomimetic output-based controller twisting controller Super-Twisting Algorithm(STA)

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Reconstruction of debris-flow activity in a temperate mountain forest catchment of central Mexico

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Journal of Mountain Science 2019年第9期16卷 2096-2109页

作者： Osvaldo FRANCO-RAMOS Markus STOFFEL Juan Antonio ballesteros-CANOVAS Instituto de Geografia. Universidad NacionalAutonoma de Mexico Ciudad Universitaria Coyoacan 04510 Mexico Dendrolab.ch Department of Earth Sciences University of Geneva 13 rue des Maraichers CH-1205 Geneva Switzerland Climate Change Impacts and Risks in the Anthropocene (C-CIA) Institute for Environmental Sciences University of Geneva 66 Boulevard Carl-Vogt CH-1205 Geneva Switzerland Department F.-A. Forelfor Environmental and Aquatic Sciences University of Geneva 66 Boulevard Carl-Vogt CH- 1205 Geneva Switzerland

The use of dendrochronology to study and date geomorphic processes in volcanic environments is still incipient, even more so on the volcanic slopes covered by temperate forests in central Mexico. Mass movements, such as debris flows, often impact forest stands where they cause damage to individual trees, thereby generating growth disturbances(GD) in the tree-ring records. The identification and dating of GD enables reconstruction of the age of trees colonizing bare surfaces after major events, but also allows the assessment of the frequency or spatial distribution of past geomorphic process activity. Here we used increment cores from 65 Pinus leiophylla, Abies religiosa, and Alnus jorullensis trees growing in the Axal gorge, on the southern slopes of La Malinche volcano, to unravel past debris-flow activity both temporally and spatially. Based on the combination of GD records, a weighted tree response index(Wit), field evidence and hydrometeorological records, we reconstructed 23 debris flows since ***, almost two-thirds of the reconstructed years with debris-flow activity in Axal gorge match with events recorded in Axaltzintle gorge located on the NE slopes of La Malinche. These findings suggest a regional triggering mechanism, most likely related to the occurrence of hurricanes. This research could be useful for disaster risk management of the La Malinche National Park.

关键词： Debris flows La Malinche volcano Dendrogeomorphology Temperate forest Hydrometeorological phenomena

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Banach Upper Density Recurrent Points of C^0-flows

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Acta Mathematica Sinica,English Series 2016年第11期32卷 1312-1322页

作者： Qi YAN Jian Dong YIN ballesteros MARNELLIE Wei Ling WU Department of Mathematics Nanchang University

Let X denote a compact metric space with distance d and F ： X×R→ X or Ft ： X→X denote a C0-flow. From the point of view of ergodic theory, all important dynamical behaviors take place on a full measure set. The aim of this paper is to introduce the notion of Banach upper density recurrent points and to show that the closure of the set of all Banach upper density recurrent points equals the measure center or the minimal center of attraction for a C0-flow. Moreover, we give an example to show that the set of quasi-weakly almost periodic points can be included properly in the set of Banach upper density recurrent points, and point out that the set of Banach upper density recurrent points can be included properly in the set of recurrent points.

关键词： C0-flow measure centre weakly almost periodic point quasi-weakly almost periodicpoint Banach upper density recurrent point

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Chylous Ascites:A Review of Pathogenesis,Diagnosis and Treatment

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Journal of Clinical and Translational Hepatology 2018年第1期6卷 105-113页

作者： Richa Bhardwaj Haleh Vaziri Arun Gautam Enrique ballesteros David Karimeddini George Y. Wu Department of Medicine Division of Gastroenterology-HepatologyUCONN HealthFarmingtonCTUSA Department of Pathology and Lab Medicine UCONN HealthFarmingtonCTUSA Department of Diagnostic Imaging and Therapeutics UCONN HealthFarmingtonCTUSA Department of Medicine Division of Gastroenterology-HepatologyUCONN HealthFarmingtonCT 06030USA

Chylous ascites(CA)is a rare form of ascites that results from the leakage of lipid-rich lymph into the peritoneal *** usually occurs due to trauma and rupture of the lymphatics or increased peritoneal lymphatic pressure secondary to *** underlying etiologies for CA have been classified as traumatic,congenital,infectious,neoplastic,postoperative,cirrhotic or *** malignancy and cirrhosis account for about two-thirds of all the cases of CA in Western countries,in this article we have attempted to reclassify CA based on portal and non-portal *** diagnosis of CA is based on the distinct characteristic of the ascitic fluid which includes a milky appearance and a triglyceride level of>200 mg/*** management consists of identifying and treating the underlying disease process,dietary modification,and *** studies have also supported the use of agents such as orlistat,somatostatin,octreotide and *** and surgical interventions in the form of transjugular intrahepatic portosystemic shunt(commonly known as TIPS),peritoneal shunt,angiography with embolization of a leaking vessel,and laparotomy remain as treatment options for cases refractory to medical management.

关键词： Chylous ascites Portal hypertension Cirrhosis Ascitic fluid Lymphatic system

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保留的跨通道启动与老化:对于近期观点的总结(英文)

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心理学报 2009年第11期41卷 1063-1074页

作者： Soledad ballesteros Julia Mayas Cognitive Aging Laboratory Department of Basic Psychology ⅡUniversidad Nacional de Educación a DistanciaMadridSpain

通道内重复启动的研究提示老年人内隐记忆未受损,这不只体现在视觉通道上还包括其他感觉通道(例如触觉、听觉和嗅觉)。然而很少有研究考察启动任务是否具有通道特异性。在以年轻人为被试的研究中发现跨通道迁移(视觉到触觉和触觉到视觉... 详细信息

通道内重复启动的研究提示老年人内隐记忆未受损,这不只体现在视觉通道上还包括其他感觉通道(例如触觉、听觉和嗅觉)。然而很少有研究考察启动任务是否具有通道特异性。在以年轻人为被试的研究中发现跨通道迁移(视觉到触觉和触觉到视觉)和通道内迁移(视觉到视觉,触觉到触觉)具有相似性。一项最近的研究进一步探索老年人在跨通道启动任务上是否受损。结果显示视觉和触觉间的跨通道启动在年轻被试和老年被试上都是保留的且具有对称性。并且,对于自然声响、图片的通道内和跨通道启动任务随着年老化发展仍旧保留。这些行为结果和其它最近神经科学结果显示跨通道启动发生于枕叶后纹状皮层区,而这一区域在老年人中未损坏。这一领域未来的研究方向包括利用不同知觉通道间、利用熟悉的和新异的刺激并结合行为的和脑成像的方法,通过设计完善的跨通道启动来研究正常老人与阿尔兹海默病人,还包括将设计得完善的启动任务包括在用于改善老年人记忆功能的项目中。

关键词：年老化跨通道启动外显记忆内隐记忆侧枕叶(LOC) 通道内启动

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Plant species with extremely small populations(PSESP) in China:A seed and spore biology perspective

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Plant Diversity 2016年第5期38卷 209-220页

作者： Ellie Merrett Wade Jayanthi Nadarajan Xiangyun Yang Daniel ballesteros Weibang Sun Hugh W.Pritchard Royal Botanic Gardens KewWellcome Trust Millennium Building The Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of Sciences Kunming Botanical Garden Kunming Institute of BotanyChinese Academy of Sciences

Approximately one fifth of the world's plants are at risk of *** these,a significant number exist as populations of few individuals,with limited distribution ranges and under enormous pressure due to habitat *** China,these most-at-risk species are described as 'plant species with extremely small populations'(PSESP).Implementing conservation action for such listed species is *** seeds is one of the main means of ex situ conservation for flowering *** storage could provide a simple and economical method for fern ex situ *** and spore germination in nature is a critical step in species regeneration and thus in situ *** what is known about the seed and spore biology(storage and germination) of at-risk species? We have used China's PSESP(the first group listing) as a case study to understand the gaps in knowledge on propagule biology of threatened plant *** found that whilst germination information is available for 28 species(23%of PSESP),storage characteristics are only known for 8%of PSESP(10 species).Moreover,we estimate that 60%of the listed species may require cryopreservation for long-term *** conclude that comparative biology studies are urgently needed on the world's most threatened taxa so that conservation action can progress beyond species listing.

关键词： Threatened species Orchids Storage characteristics Cryopreservation ex situ conservation

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Long-term reconstruction of flash floods in the Qilian Mountains,China,based on dendrogeomorphic methods

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Journal of Mountain Science 2022年第11期19卷 3163-3177页

作者： QIE Jia-zhi ZHANG Yong TRAPPMANN Daniel ZHONG Yi-hua ballesteros-CÁNOVAS Juan Antonio FAVILLIER Adrien STOFFEL Markus Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Climate Change Impacts and Risks in the Anthropocene(C-CIA) Institute for Environmental SciencesUniversity of GenevaGeneva CH-1205Switzerland Dendrolab.ch Department of Earth SciencesUniversity of GenevaGeneva CH-1205Switzerland National Museum of Natural Sciences MNCN-CSICC/Serrano 115bis28006MadridSpain Department F.-A.Forel for Environmental and Aquatic Sciences University of GenevaGeneva CH-1205Switzerland

In China,flash floods are one of the main natural disasters causing loss of life and damage to *** threat of flash floods is exacerbated with climate change and increased human activities,such that the number of disasters has shown a clear upward trend in recent ***,due to the scarcity of instrumental data or overly short timeseries,we are still lacking critical data to understand spatio-temporal patterns and driving factors of extreme flash *** missing knowledge is however crucial for a proper management of these hazards,especially in remote mountain *** forested catchments,dendrogeomorphology allows the reconstruction of past process activity based on growth disturbances(GDs)in trees that have been affected by past flash ***,in our study,for the first time,we reconstruct past flash floods in the Qilian Mountains,northeast Tibetan Plateau,over past *** this end,we sampled 99 Qinghai spruce(Picea crassifolia)trees affected by flash floods,with a total of 194increment cores,and identified 302 GDs induced by past flash *** GDs have been caused by at least 21 flash floods that we are able to reconstruct over the last 170 *** position of GDs within tree rings and the intra-seasonal dating of past events also allowed discussion of the likely synoptic situations that may have led to the triggering of flash floods in the *** regression analysis confirms that significant correlation exists between cumulative maximum 5-day August-September precipitation and reconstructed flash floods,which is corresponding to the majority of scars and related tangential rows of traumatic resin ducts(TRDs)found in the latewood portion of growth *** results support the idea that abundant precipitation occurring at the end of the summer season and early fall is the key factor driving flash floods in our study *** research not only fills the gaps regarding historical flash flood histories in

关键词： Tree ring Dendrogeomorphology Flash floods Qinghai spruce Qilian Mountains

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Emerging bisphenol a replacements(colour developers)in indoor dust from Spain

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Emerging Contaminants 2019年第1期5卷 168-172页

作者： María Jesús Duenas-Mas Ana ballesteros-Gomez Soledad Rubio Department of Analytical Chemistry Institute of Fine Chemistry and NanochemistryMarie Curie Building AnnexCampus of RabanalesUniversity of Cordoba14071CordobaSpain

Bisphenol A(BPA)and replacements,such as bisphenol S(BPS)and F(BPF)and other substitutes(BPSMAE,D-8 and TGSA)have been recently reported in thermal *** this study,BPA,BPS,BPF;BPS-MAE,D-8 and TGSA were analysed in indoor dust collected in Spain from different microenvironments(living rooms,bedrooms,cars and offices).Levels were compared with those reported in our previous study(shops and other public microenvironments,where frequent use of thermal paper is expected).We investigated the differences between microenvironments,possible correlations between compounds and estimated the ingestion ***-MAE,D-8 and TGSA were present at levels up to 529,128 and 356 ng g^-1,respectively,in all the *** highest levels were measured in cars.

关键词： Bisphenol A Bisphenol F Bisphenol S BPS-MAE D-8 TGSA Indoor dust

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Synthesis and Characterization of WS_(2) Inorganic Nanotubes with Encapsulated/Intercalated CsI

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Nano Research 2010年第3期3卷 170-173页

作者： Sung You Hong Ronit Popovitz-Biro Gerard Tobias Belén ballesteros Benjamin G.Davis Malcolm L.H.Green Reshef Tenne Department of Chemistry Chemistry Research LaboratoryUniversity of OxfordMansfield RoadOxfordOX13TAUK Electron Microscopy Unit Weizmann Institute of ScienceRehovot 76100Israel Inorganic Chemistry Laboratory University of OxfordSouth Parks RoadOxfordOX13QRUK Department of Materials and Interfaces Weizmann Institute of ScienceRehovot 76100Israel

WS2 nanotubes have been filled and intercalated by molten phase caesium *** presence of caesium iodide inside the WS_(2) nanotubes has been determined using high-resolution transmission electron microscopy(HRTEM)coupled with electron energy-loss spectroscopy(EELS)and energy-dispersive X-ray spectroscopy(EDS).Noticeably,a Moirépattern was observed due to the interference between encapsulated CsI and WS_(2) *** intercalation of CsI into the host concentric WS2 lattices resulted in an increase in the interplanar spacing.

关键词： Inorganic nanotubes transmission electron microscopy intercalation encapsulation

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