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TinyML-Based Fall Detection for Connected Personal Mobility Vehicles

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Computers, Materials & Continua 2022年第5期71卷 3869-3885页

作者： ramon Sanchez-Iborra Luis Bernal-Escobedo jose Santa Antonio Skarmeta University Center of Defense General Air Force AcademySan Javier30720Spain University of Murcia Murcia30100Spain Technical University of Cartagena Cartagena30202Spain

A new wave of electric vehicles for personal mobility is currently crowding public spaces.They offer a sustainable and efficient way of getting around in urban environments,however,these devices bring additional safety issues,including serious accidents for riders.Thereby,taking advantage of a connected personal mobility vehicle,we present a novel on-device Machine Learning(ML)-based fall detection system that analyzes data captured from a range of sensors integrated on an on-board unit(OBU)prototype.Given the typical processing limitations of these elements,we exploit the potential of the TinyML paradigm,which enables embedding powerful ML algorithms in constrained units.We have generated and publicly released a large dataset,including real riding measurements and realistically simulated falling events,which has been employed to produce different TinyML models.The attained results show the good operation of the system to detect falls efficiently using embedded OBUs.The considered algorithms have been successfully tested on mass-market low-power units,implying reduced energy consumption,flash footprints and running times,enabling new possibilities for this kind of vehicles.

关键词： Personal mobility machine learning on-board unit C-ITS IoT

Machine Learning-Based Radio Access Technology Selection in the Internet of Moving Things

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China Communications 2021年第7期18卷 13-24页

作者： ramon Sanchez-Iborra Luis Bernal-Escobedo jose Santa Dept.Engineering and Applied Techniques University Centre of Defence at the Spanish Air Force Academy30729 San JavierSpain Dept.Information and Communication Engineering University of Murcia30100 MurciaSpain Dept.of Electronics Computing Technology and ProjectsTechnical University of Cartagena30202 CartagenaSpain

The Internet of Moving Things(IoMT)takes a step further with respect to traditional static IoT deployments.In this line,the integration of new eco-friendly mobility devices such as scooters or bicycles within the Cooperative-Intelligent Transportation Systems(C-ITS)and smart city ecosystems is crucial to provide novel services.To this end,a range of communication technologies is available,such as cellular,vehicular WiFi or Low-Power Wide-Area Network(LPWAN);however,none of them can fully cover energy consumption and Quality of Service(QoS)requirements.Thus,we propose a Decision Support System(DSS),based on supervised Machine Learning(ML)classification,for selecting the most adequate transmission interface to send a certain message in a multi-Radio Access Technology(RAT)set up.Different ML algorithms have been explored taking into account computing and energy constraints of IoMT enddevices and traffic type.Besides,a real implementation of a decision tree-based DSS for micro-controller units is presented and evaluated.The attained results demonstrate the validity of the proposal,saving energy in communication tasks as well as satisfying QoS requirements of certain urgent messages.The footprint of the real implementation on an Arduino Uno is 444 bytes and it can be executed in around 50µs.

关键词： internet of moving things multi-RAT CITS classification personal mobility

Genome editing for plant research and crop improvement

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Journal of Integrative Plant Biology 2021年第1期63卷 3-33页

作者： Xiangqiang Zhan Yuming Lu Jian-Kang Zhu jose ramon Botella State Key Laboratory of Crop Stress Biology for Arid Areas and College of Horticuture Northwest A&F UniversityXianyang 712100 Shanghai Center for Plant Stress Biology CAS Center of Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032China Department of Horticulture and Landscape Architecture Purdue UniversityWest LafayetteIndiana 47907USA School of Agriculture and Food Sciences University of QueenslandBrisbaneQueensland 4072Australia

The advent of clustered regularly interspaced short palindromic repeat(CRISPR) has had a profound impact on plant biology, and crop improvement. In this review, we summarize the state-of-the-art development of CRISPR technologies and their applications in plants, from the initial introduction of random small indel(insertion or deletion) mutations at target genomic loci to precision editing such as base editing, prime editing and gene targeting. We describe advances in the use of class 2, types II, V, and VI systems for gene disruption as well as for precise sequence alterations, gene transcription, and epigenome control.

关键词： CRISPR/Cas crop improvement genome editing plant research

Gene editing in plants:progress and challenges

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National Science Review 2019年第3期6卷 421-437页

作者： Yanfei Mao jose ramon Botella Yaoguang Liu Jian-Kang Zhu Shanghai Center for Plant Stress Biology CAS Center of Excellence in Molecular Plant Sciences Chinese Academy of Sciences School of Agriculture and Food Sciences University of Queensland State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources College of Life Sciences South China Agricultural University Department of Horticulture and Landscape Architecture Purdue University

The clustered regularly interspaced short palindromic repeat(CRISPR)-associated protein 9(Cas9)genome editing system is a powerful tool for targeted gene modifications in a wide range of species,including plants. Over the last few years, this system has revolutionized the way scientists perform genetic studies and crop breeding, due to its simplicity, flexibility, consistency and high efficiency. Considerable progress has been made in optimizing CRISPR/Cas9 systems in plants, particularly for targeted gene mutagenesis. However, there are still a number of important challenges ahead, including methods for the efficient delivery of CRISPR and other editing tools to most plants, and more effective strategies for sequence knock-ins and replacements. We provide our viewpoint on the goals, potential concerns and future challenges for the development and application of plant genome editing tools.

关键词： CRISPR Cas9 genome editing base editing gene targeting crop breeding

NUMERICAL ANALYSIS OF A PROBLEM INVOLVING A VISCOELASTIC BODY WITH DOUBLE POROSITY

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Journal of Computational Mathematics 2022年第3期40卷 415-436页

作者： Noelia Bazarra jose R.Fernandez MariCarme Leseduarte Antonio Magana ramon Quintanilla Departamento de Matematica Aplicada I Universidade de VigoETSI TelecomunicacionCampus As Lagoas Marcosende s/n36310 VigoSpain Departamento de Matematicas E.S.E.I.A.A.T.-U.P.C.Colom 1108222 TerrassaBarcelonaSpain

We study from a numerical point of view a multidimensional problem involving a viscoelastic body with two porous structures.The mechanical problem leads to a linear system of three coupled hyperbolic partial differential equations.Its corresponding variational formulation gives rise to three coupled parabolic linear equations.An existence and uniqueness result,and an energy decay property,are recalled.Then,fully discrete approximations are introduced using the finite element method and the implicit Euler scheme.A discrete stability property and a priori error estimates are proved,from which the linear convergence of the algorithm is derived under suitable additional regularity conditions.Finally,some numerical simulations are performed in one and two dimensions to show the accuracy of the approximation and the behaviour of the solution.

关键词： Viscoelasticity with double porosity Finite elements A priori estimates Numerical simulations

Some Comments on Zonal Polynomials and Their Expected Values with respect to Elliptical.Distributions

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Acta Mathematicae Applicatae Sinica 2017年第3期33卷 567-574页

作者： jose A.Diaz-Garcia ramon Gutierrez-Jaimez Department of Statistics and Computation Universidad Autonoma Agraria Antonio Narro25350 BuenavistaSaltilloCoahuilaMexico Department of Statistics and O.R University of GranadaGranada 18071Spain

In this paper, we give alternative proofs of some results in [15] （Li R.,1997） about the expected value of zonal polynomials.

关键词： elliptical matrix distributions random matrices zonal polynomials generalised Wishart distribution

A Sufficient Degree Condition for a Graph to Contain All Trees of Size k

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Acta Mathematica Sinica,English Series 2011年第1期27卷 135-140页

作者： Camino BALBUENA Alberto MARQUEZ jose ramon PORTILLO Departament de Matemhtica Aplicada III Universitat Politecnica de Catalunya C/ Jordi Girona 1-3 (Edifici C2 Despatx 302) 08034 Barcelona Spain Departamento de Matemdtica Aplicada I Universidad de SeviUaE.T.S. de Informdtica Avda. Reina Mercedes s//n 41012 SeviUa Spain

The Erdos-Sos conjecture says that a graph G on n vertices and number of edges e（G）〉 n（k - 1）/2 contains all trees of size k. In this paper we prove a sufficient condition for a graph to contain every tree of size k formulated in terms of the minimum edge degree ξ（G） of a graph G defined as {（G） = min{d（u）＋ d（v） - 2 ： uv ∈ E（G）}. More precisely, we show that a connected graph G with maximum degree △（G） ≥ k and minimum edge degree {（G）〉 2k - 4 contains every tree of k edges if dG（x）＋ dG（y） ≥ 2k - 4 for all pairs x, y of nonadjacent neighbors of a vertex u of dG（u） ≥ k.

关键词： Erdos-Sos conjecture

Simultaneous optimization of even flow and land and timber value in forest planning:a continuous approach

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Forest Ecosystems 2021年第4期8卷 645-658页

作者： jose M.Gonzalez-Gonzalez Miguel E.Vazquez-Mendez Ulises Dieguez-aranda Departamento de Enxenaria Agroforestal Universidade de Santiago de Compostela.Escola Politecnica Superior de EnxenariaR/Benigno Ledo27002 LugoSpain Departamento de Matematica Aplicada Instituto de MatematicasUniversidade de Santiago de Compostela.Escola Politecnica Superior de EnxenariaR/Benigno Ledo27002 LugoSpain

Background:Forest management planning involves deciding which silvicultural treatment should be applied to each stand and at what time to best meet the objectives established for the forest.For this,many mathematical formulations have been proposed,both within the linear and non-linear programming frameworks,in the latter case generally considering integer variables in a combinatorial manner.We present a novel approach for planning the management of forests comprising single-species,even-aged stands,using a continuous,multi-objective formulation(considering economic and even flow)which can be solved with gradient-type methods.Results:The continuous formulation has proved robust in forest with different structures and different number of stands.The results obtained show a clear advantage of the gradient-type methods over heuristics to solve the problems,both in terms of computational time(efficiency)and in the solution obtained(effectiveness).Their improvement increases drastically with the dimension of the problem(number of stands).Conclusions:It is advisable to rigorously analyze the mathematical properties of the objective functions involved in forest management planning models.The continuous bi-objective model proposed in this paper works with smooth enough functions and can be efficiently solved by using gradient-type techniques.The advantages of the new methodology are summarized as:it does not require to set management prescriptions in advance,it avoids the division of the planning horizon into periods,and it provides better solutions than the traditional combinatorial formulations.Additionally,the graphical display of trade-off information allows an a posteriori articulation of preferences in an intuitive way,therefore being a very interesting tool for the decision-making process in forest planning.

关键词： Even-aged forest management Forest-level optimization Continuous optimization Gradient-type algorithms

低温条件下提高重油天然裂缝储层采收率的空气／溶剂驱技术——该技术提高采收率的关键要素：充注时间、操作条件、充注气体的先后顺序，其中优化参数选择至关重要

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世界石油工业 2017年第6期24卷 52-60页

作者： jose ramon Mayorquin-Ruiz 墨西哥石油公司

对低温条件下提高重油天然裂缝储层采收率的空气／溶剂驱技术进行研究，结果表明：75℃条件下，空气-C3作为驱替剂提高采收率的效果最佳，但是在该温度下，最终气体混合物中含有较高的O2。在高温条件下，由于O2被消耗，所以实验结果优... 详细信息

对低温条件下提高重油天然裂缝储层采收率的空气／溶剂驱技术进行研究，结果表明：75℃条件下，空气-C3作为驱替剂提高采收率的效果最佳，但是在该温度下，最终气体混合物中含有较高的O2。在高温条件下，由于O2被消耗，所以实验结果优于低温条件；碳氧化物可能是低温氧化反应的最终产物，也可能与放热反应有关。随着温度的提高，氧化物对采收率的影响减小，空气驱与空气-C3驱的效果接近，但是C3浓度越高采收率提高效果越明显。提高采收率的关键要素包括充注时间、操作条件、充注气体的先后顺序，优化参数选择至关重要。未来对于注气驱油的研究重点将集中在针对不同基质及裂缝大小，量化C3／空气值。

关键词：低温条件空气/溶剂驱技术提高采收率关键要素 C3/空气值