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Machine learning-based zero-touch network and service management:a survey

Digital Communications and Networks 2022年第2期8卷 105-123页

作者： Jorge Gallego-Madrid Ramon sanchez-Iborra pedro M.Ruiz Antonio F.Skarmeta Department of Information and Communication Engineering University of Murcia30100MurciaSpain Department of Engineering and Applied Techniques University Center of Defense30729San Javier Air Force BaseSpain

The exponential growth of mobile applications and services during the last years has challenged the existing network infrastructures.Consequently,the arrival of multiple management solutions to cope with this explosion along the end-to-end network chain has increased the complexity in the coordinated orchestration of different segments composing the whole infrastructure.The Zero-touch Network and Service Management(ZSM)concept has recently emerged to automatically orchestrate and manage network resources while assuring the Quality of Experience(QoE)demanded by users.Machine Learning(ML)is one of the key enabling technologies that many ZSM frameworks are adopting to bring intelligent decision making to the network management system.This paper presents a comprehensive survey of the state-of-the-art application of ML-based techniques to improve ZSM performance.To this end,the main related standardization activities and the aligned international projects and research efforts are deeply examined.From this dissection,the skyrocketing growth of the ZSM paradigm can be observed.Concretely,different standardization bodies have already designed reference architectures to set the foundations of novel automatic network management functions and resource orchestration.Aligned with these advances,diverse ML techniques are being currently exploited to build further ZSM developments in different aspects,including multi-tenancy management,traffic monitoring,and architecture coordination,among others.However,different challenges,such as the complexity,scalability,and security of ML mechanisms,are also identified,and future research guidelines are provided to accomplish a firm development of the ZSM ecosystem.

关键词： Zero-touch network and service management(ZSM) Next generation networks(NGN) Artificial intelligence(AI) Machine learning(ML)

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Prevalence of meeting 24-Hour Movement Guidelines from pre-school to adolescence: A systematic review and meta-analysis including 387,437 participants and 23 countries

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Journal of Sport and Health Science 2022年第4期11卷 427-437页

作者： Miguel Angel Tapia-Serrano Javier Sevil-Serrano pedro Antonio sanchez-Miguel Jose Francisco Lopez-Gil Mark STremblay Antonio Garcıa-Hermoso Department of Didactics of Musical Plastic and Body ExpressionFaculty of Teaching TrainingUniversity of ExtremaduraAvenida de la UniversidadS/NCaceres 10071Spain Department of Physical Activity and Sport Faculty of Sport ScienceUniversity of Murcia(UM)San Javier 30720Spain Healthy Active Living and Obesity Research Group Children’s Hospital of Eastern Ontario(CHEO)Research InstituteOttawaON K1H 8L1Canada Navarrabiomed Public University of Navarra(UPNA)Health Research Institute of Navarra(IdiSNA)Navarra Hospital Complex(CHN)Pamplona 310008Spaia

Background:Meeting the 24-Hour Movement Guidelines(physical activity,screen time,and sleep duration) has been associated with positive health indicators.However,there are no previous meta-analyses that have examined the overall adherence to the 24-Hour Movement Guidelines from pre-school to adolescence across the world.Therefore,the main purpose of this systematic review and meta-analysis was to examine the overall(non)adherence to the 24-Hour Movement Guidelines among preschoolers,children,and adolescents worldwide.Methods:Four electronic databases(MEDLINE,Scopus,Web of Science,and Cochrane Database of Systematic Reviews) were searched for quantitative studies published in Spanish and English between January 2016 and May 2021.Studies that were conducted with apparently healthy participants and reported the overall(non)adherence to the 24-Hour Movement Guidelines in preschoolers and/or children and/or adolescents were included.Results:Sixty-three studies comprising 387,437 individuals(51% girls) aged 3-18 years from 23 countries were included.Overall,7.12%(95%confidence interval(95%CI):6.45%-7.78%) of youth met all three 24-Hour Movement Guidelines,and 19.21%(95%CI:16.73%-21.69%)met none of the 3 recommendations.Concerning sex,adherence to all recommendations was significantly lower in girls(3.75%,95%CI:3.23%-4.27%) than in boys(6.89%,95%CI:5.89%-7.89%)(p <0.001).However,there were no sex differences regarding adherence to any of the 3 individual recommendations(girls,15.66%,95%CI:8.40%-22.92%;boys,12.95%,95%CI:6.57%-19.33%).In terms of age group,adherence to the 3 recommendations was 11.26%(95%CI:8.68%-13.84%),10.31%(95%CI:7.49%-13.12%),and 2.68%(95%CI:1.78%-3.58%) in preschoolers,children,and adolescents,respectively.Conversely,8.81%(95%CI:5.97%-11.64%) of preschoolers,15.57%(95%CI:11.60%-19.54%) of children,and 28.59%(95%CI:22.42%-34.75%) of adolescents did not meet any of the recommendations.South America was the region with the lowest adherence(all:2.93%;none:31.72%).Overall adherence to the 24-Hour Movement

关键词： Exercise Lifestyle Movement behaviors Sedentary behaviors Youth

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High-Efficiency DC-DC Converter for Large Input-Voltage Fluctuations in Solar Applications

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Chinese Journal of Electronics 2015年第3期24卷 502-507页

作者： AGUILLON-GARCIA Jacobo BANUELOS-sanchez pedro SIST Sun Yat-sen University

In the solar energy systems the solar irradiance variation is partially engaged, limiting the converter’s transformation rate for a certain input amount and leaving the rest of energy unconverted. In order to utilize at its maximum the energy provided from a Photovoltaic(PVP) system, this manuscript proposed a topology that can cope with marginal input voltage variations from 60V(DC) up to 1050V(DC) for a steady output voltage of 700V(DC). This output voltage value is suitable for any interlink post-regulation architecture. Based on previous observations, this paper presents a wide-input voltage high-efficiency non-isolated single-control topology. Analysis, operating stages, simulations and experimental results for a 3k W prototype are presented.

关键词： DC-DC power converters Energy conversion Photovoltaic system Power conditioning Solar generation

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The road to opportunities： landscape change promotes body-size divergence in a highly mobile species

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Current Zoology 2016年第1期62卷 7-14页

作者： Carlos CAMACHO pedro SAEZ Sonia sanchez Sebastian PALACIOS Carlos MOLINA Jaime POTTI Department of Evolutionary Ecology Estacion Biologica de Donana--CSIC Av. Americo Vespucio 41092 SevilleSpain Department of Environmental Biology and Public Health. University of Huelva. Av. Andalucia 21071 HuelvaSpain Department of Conservation Biology Estacion Biologica de Donana--CSlC Av. Americo Vespucio 41092Seville Spain Sociedad Espafiola de Ornitologia. Centro Ornitologico Francisco Bernis. Paseo Marismeno sn 21750 Huelva Spain

Landscape change provides a suitable framework for investigating population-level responses to novel ecological pressures. However, relatively little attention has been paid to examine the potential influence of landscape change on the geographic scale of population differentiation. Here, we tested for morphological differentiation of red-necked nightjars breeding in a managed property and a natural reserve situated less than 10 km apart. At both sites, we also estimated site fidelity over 5 years and quantified the potential foraging opportunities for nightjars. Breeding birds in the managed habitat were significantly larger in size-as indexed by keel length-than those in the natural one. However, there were no significant differences in wing or tail length. Immigration from neighboring areas was almost negligible and, furthermore, no individual (out of 1130 captures overall) exchanged habitats between years, indicating strong site fidelity. Food supply for nightjars was equally abundant in both habitats, but the availability of foraging sites was remarkably higher in the managed property. As a result, nightjars-particularly fledglings-in the latter habitat benefited from increased foraging opportunities in relation to those in the natural site. It seems likely that the fine-scale variation in nightjar morphology reflects a phenotypic response to unequal local conditions, since non-random dispersal or differential mortality had been determined not to be influential. High site fidelity appears to contribute to the maintenance of body-size differences between the two habitats. Results from this nightjar population highlight the potential of human-induced landscape change to promote population-level responses at exceedingly small geographic scales.

关键词：动物学演化发展动物分类学

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Nodal involvement and p16-staining in upper alveolar ridge and hard palate cancer

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Journal of Cancer Metastasis and Treatment 2018年第1期4卷 186-198页

作者： Edgar Salas pedro sanchez Juan Postigo Carlos A.Castaneda Miluska Castillo Valeria Villegas Luis Cano Sandro Casavilca Luis A.Bernabe Carolina Belmar Maria R.Villa-Robles Raul Mantilla Henry Guerra Head&Neck Surgery Department Instituto Nacional de Enfermedades NeoplasicasLima 15038Peru Research Department Instituto Nacional de Enfermedades NeoplasicasLima 15038Peru Faculty of Medicine Universidad Peruana San Juan BautistaLima 15067Peru Pathology Department Instituto Nacional de Enfermedades NeoplasicasLima 15038Peru

Aim:Upper alveolar ridge and hard palate squamous cancer is an infrequent malignancy.We evaluated factors associated with neck involvement and with p16-staining.Methods:Head and neck squamous-cell carcinoma(SCC)patients who went to Head and Neck Department between 1997 and 2011 were screened,and 73 resected upper alveolar ridge and 5 hard palate SCC were selected.Tumors with available tissue were stained with p16 immunohistochemistry.Results:Median age was 64.4 years,55.1%were female,and 73.1%were in clinical stage IV.Neck dissections were performed in 24 and pathologically confirmed node metastases were found in 19(24.3%).Cervical recurrence was found in 18 patients(23.1%)and was associated with histological grade(P=0.037).Three(7.3%)of 41 lesions were positive for p16 and tended to be younger(P=0.067).Lymphovascular invasion was associated with shorter disease-free survival(DFS)(P=0.026)and overall survival(OS)(P=0.021).Larger cT(P=0.019),perineural invasion(P=0.039)and neck dissection(P=0.010)were associated with shorter OS.Neck node involvement tended to have shorter DFS(31%vs.48.7%,P=0.278)and OS(25.1%vs.48.5%,P=0.340),and neck recurrence tended to have shorter OS(9.3%vs.52.3%,P=0.064).Conclusion:Neck involvement and recurrence are frequent in this location.P16-positive cases were present in 7.3%and tended to be associated with younger age.

关键词： P16 head neck maxilla prognosis survival

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Simulation of an Ultrasonic Transducer for Medical Applications Using the Finite Element Method

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材料科学与工程（中英文B版） 2015年第7期5卷 293-297页

作者： pedro Acevedo Israel sanchez Domingue Universidad Nacional Aut6noma de Mdxico Institutito de Investigaciones en Matematicas Aplicadas yen Sistemas Mexico D. F.Mdxico Universidad Nacional Autonoma de Mexico lnstitutito de lnvestigaciones en Matematicas Aplicadas yen Sistemas-UnidadAcademica de Ciencias y Tecnologia de la UNAM en Yucatan Merida Merida Yucatan Mexico

This paper presents the simulation of a PIC255 commercial piezoelectric ceramic which was used in the design of an 8 MHz ultrasonic transducer, as a novelty a biocompatible material known as rexolite was incorporated as acoustic matching. The FEM (Finite element method) was used in the simulation. This work shows that it is feasible to predict the response of the ceramic in each one of the stages generating with this a significant saving in time and human resources. Frequency responses are presented in addition to the stress and strain responses of the ceramic.

关键词：有限元模拟超声换能器医用压电陶瓷有限元法人力资源频率响应应变响应

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Optimization of Resource in the Industry of Construction

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Journal of Civil Engineering and Architecture 2014年第9期8卷 1145-1150页

作者： Francisco Javier Gutierrez Garcia pedro Perez Diaz pedro sanchez Luis Department of Construction Engineering University of La Laguna Tenerife 38204 Spain

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Comparison between type-2 and type-1 myocardial infarction：clinical features, treatment strategies and outcomes

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Journal of Geriatric Cardiology 2016年第1期13卷 15-22页

作者： Angel Lopez-Cuenca Miriam Gomez-Molina pedro J Flores-Blanco Marianela sanchez-Martinez Andrea Garcia-Narbon Ignacio De Las Heras-Gomez Maria J Sainchez-Galian Esther Guerrero-Perez Mariano Valdes Sergio Manzano-Femandez Department of Internal Medicine Hospital de la Vega Lorenzo Guirao Cieza Spain Division of Cardiology University Hospital Virgen de la Arrixaca School of Medicine IMIB Murcia Spain Department of Biochemistry University Hospital Virgen de la Arrixaca School of Medicine IMIB Murcia Spain Department of lnternal Medicine University of Murcia Murcia Spain

ObjectiveTo 与尖锐心肌的梗塞(AMI ).MethodsWe 包括了的 type-2 对 type-1 在病人在发生，临床的特征，当前的治疗策略和结果估计差别有 type-1 或 type-2 AMI 的诊断的 824 个连续病人。在索引住院期间，临床的特征和治疗策略详细被... 详细信息

ObjectiveTo 与尖锐心肌的梗塞(AMI ).MethodsWe 包括了的 type-2 对 type-1 在病人在发生，临床的特征，当前的治疗策略和结果估计差别有 type-1 或 type-2 AMI 的诊断的 824 个连续病人。在索引住院期间，临床的特征和治疗策略详细被收集。在 1 年的后续，死亡，击，流血的非致命的心肌的梗塞和专业是 recorded.ResultsType-1 AMI 在 707 是在场的(86%) 盒子当(14%) 117 作为 type-2 被分类时。有 type-2 AMI 的病人更经常是象糖尿病那样的女、有的更高的合作病态，以前的非圣片断举起急性冠的症候群，损害肾的功能，贫血症， atrial 纤维性颤动和恶意。然而，保存了左室的喷射部分，正常冠的动脉是经常看见的更多，侵略治疗是不太普通的，并且反血小板药， statins 和 beta-blockers 是在有 type-2 AMI 的病人规定的更少。在 1 年的后续， type-2 AMI 与更高粗略的死亡风险被联系(HR：1.75， 95% CI：1.14-2.68；P = 0.001 ) ，但是这个协会没在 multivariable 调整以后仍然保持重要(P = 0.785 ) 。而且，我们没发现 type-2 AMI 与另外的临床的 outcomes.ConclusionsIn 被联系这张真实人口与 type-1 相比， type-2 AMI 是主要女人们并且有更多的合作病态。侵略治疗策略和 cardioprotective 药是在 type-2 使用的更少，当 1 年的临床的结果是类似的时。

关键词：冠的容器后续学习心肌的梗塞

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Construction and Characterization of an Ultrasonic Array Using Different Backing Materials to Evaluate Crosstalk

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材料科学与工程（中英文B版） 2013年第8期3卷 493-497页

作者： Israel sanchez Dominguez pedro Acevedo Contla Polytechnic University of Madrid School of lndustrial Engineering Madrid 28001 Spain National Autonomous University of Mexico Institute of Research in Applied Mathematics and Systems Mexico City 04510Mexico

The construction and characterization of an ultrasonic array using different backing materials are presented. In the construction of these arrays PZT piezoelectric elements are used as sensors. The objective of this paper is to evaluate the propagation of crosstalk in different materials to find an optimum material to be used in the construction of the array. Rexolite, copper and brass were the materials used in this work due to their ideal propagation characteristics and taking into account the geometry and dimensions of the array, these three different materials were studied to verify which one of them offered the best option to determine the propagation of the phenomenon of crosstalk. Simulations made using a finite elements software (COMSOL) showed that the various modes of response of the array can be determined, and using frequency generators, drivers and digital oscilloscopes is possible to validate the simulations presented in this work.

关键词：衬底材料串扰特性声阵列评估超声波传播特性频率发生器数字示波器

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Multivariate Statistical Analysis of Phyllite Samples Based on Chemical(XRF)and Mineralogical Data by XRD

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American Journal of Analytical Chemistry 2012年第5期3卷 347-363页

作者： Eduardo Garzon Garzon Antonio Ruiz-Conde pedro Jose sanchez-Soto Department of Rural Engineering University of AlmeriaLa Canada de San UrbanoSpain Instituto de Ciencia de Materiales Centro Mixto C.S.I.C.—US.Avda.Americo VespuccioSevillaSpain

It is presented the results obtained of a multivariate statistical analysis concerning the chemical and phase composition, as a characterization purpose, carried out with 52 rock phyllite samples selected from the provinces of Almería and Granada (SE Spain). Chemical analysis was performed by X-ray fluorescence (XRF). Crystalline phase analysis was performed by X-ray powder diffraction (XRD) and the mineralogical composition was then deduced. Quantification of weight loss (100? and 1000?C) was carried out by thermal analysis. The aims of this investigation were to analyze and compare the chemical and mineralogical composition of all these samples and to find similarities and differences between them to allow a classification. Several correlations between results of the characterization techniques have been also investigated. All the data have been processed using the multivariate statistical analysis method. The XRF macro-elements (10) and microelements (39) data generate one macrogroup with two new subgroups (1 and 2), and an isolated sample. In subgroup 1 of macroelements, a positive correlation was found between XRF results and geographic location characterized by lower MgO content, which is associated to its geological origins. When multivariate statistical analysis is applied to results obtained by XRD, two groups appear: the first one with a sample with zero percentage of iron oxide and the second one with the rest of the samples, which is classified in two groups. A correlation is observed between the alkaline content (XRF) and illite (XRD), CaO and MgO with dolomite and indirectly between the weight loss after heating at 1000?C and the contents of phase minerals that lose structural water (illite + chlorite) or carbon dioxide (dolomite). The present investigation has interest and implications for geochemistry and analytical chemistry concerning earth rocks and silicate raw materials.

关键词： Selection Multivariate Phyllites XRF XRD

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