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Long-term economic sensitivity analysis of light duty underground mining vehicles by power source

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International Journal of Mining science and Technology 2017年第3期27卷 567-571页

作者： schatz Richard s. Nieto antonio Lvov serguei N. The EMs Energy Institute College of Earth and Mineral Engineering The Pennsylvania State University State College PA 16802 USA Department of Energy and Mineral Engineering College of Earth and Mineral Engineering The Pennsylvania State University State College PA 16802 USA Department of Materials science and Engineering College of Earth and Mineral Engineering The Pennsylvania State University State College PA 16802 USA

LHD's are expensive vehicles; therefore, it is important to accurately define the financial consequences associated with the investment of purchasing the mining equipment. This study concentrates on longterm incremental and sensitivity analysis to determine whether it is feasible to incorporate current battery technology into these machines. When revenue was taken into account, decreasing the amount of haulage in battery operated equipment by 5% or 200 kg per h amounts to a $4.0 × 10~4 loss of profit per year. On average it was found that using battery operated equipment generated $9.5 × 10~4 more in income annually, reducing the payback period from seven to two years to pay back the additional $1.0 × 10~5 investment of buying battery powered equipment over cheaper diesel equipment. Due to the estimated 5% increase in capital, it was observed that electric vehicles must possess a lifetime that is a minimum of one year longer than that of diesel equipment.

关键词： sensitivity analysis Underground mining vehicles Battery power Battery mining equipment Economic evaluation

Quasi-freestanding graphene on Ni（110）： A graphene/ metal contact with suppressed interface states

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Nano Research 2016年第6期9卷 1795-1800页

作者： antonio Politano Department of Physics University of Calabria via Ponte Bucci 3 I/C 1-87036 Rende (CS) Italy

Graphene/Ni（110） has been studied by time-resolved X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure. The C ls core level shows a splitting typical of periodically rippled interfaces. The analysis of the C K-edge reveals that the interface states previously observed for graphene/Ni（111） are suppressed in graphene/Ni（110）. This suppression is due to the reduced hybridization of the Dirac-cone electrons in graphene with the d-bands of the （110）-oriented nickel contacts. Our results show that, contrary to commensurate growth of graphene on Ni（111）, epitaxially grown graphene on Ni（110） behaves as a quasi-freestanding sheet, as the lattice mismatch gives rise to a moir6 reconstruction.

关键词： graphene electronic properties synchrotron radiation X-ray photoelectronspectroscopy near-edge X-rayphotoelectron spectroscopy

Influence of parameters on the microstructure of a duplex stainless steel joint welded by a GMAW welding process

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Progress in Natural science:Materials International 2022年第4期32卷 415-423页

作者： sandra Chacón-Fernández antonio Portolés García Gerardo Romaní Labanda Universidad Politécnica de Madrid Escuela Técnica Superior de Ingenieros Industriales UPM

Duplex stainless steels（Dsss） are widely used in industry for their desirable properties. Any fusion welding technique modifies the microstructure and, consequently, the properties of the material. This paper presents a parametric study of the variables that determine the energy contribution（current, voltage and welding speed） and the structural modifications produced during gas metal arc welding. The analysis comprises metallographic study,phase balance, dimensioning of the weld beads and tensile and hardness tests. The influence of the variables studied on the thermal cycles obtained（temperatures reached and cooling rate） was determined by using a finite element model. The results showed that, in addition to the indicated parameters, the parameter power transfer per volume（W/m3） and the geometry in the bead must be controlled due to their influence on the heat flow distribution and phase balance.

关键词： Welding Heat input GMAW Duplex stainless steels (Dss) Finite element model (FEM)

Elastic smart Contracts in Blockchains

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IEEE/CAA Journal of Automatica sinica 2021年第12期8卷 1901-1912页

作者： schahram Dustdar Pablo Fernández JoséMaría García antonio Ruiz-Cortés Distributed systems Group Vienna University of TechnologyWien 1040Austria smart Computer systems Research and Engineering Lab Research Institute of Computer EngineeringUniversity of SevillaSevilla 41012Spain

In this paper,we deal with questions related to blockchains in complex Internet of Things(IoT)-based *** ecosystems are typically composed of IoT devices,edge devices,cloud computing software services,as well as people,who are decision makers in scenarios such as smart *** decisions related to analytics can be based on data coming from IoT sensors,software services,and ***,they are typically based on different levels of abstraction and *** poses a number of challenges when multiple blockchains are used together with smart *** work proposes to apply our concept of elasticity to smart contracts and thereby enabling analytics in and between multiple blockchains in the context of *** propose a reference architecture for Elastic smart Contracts and evaluate the approach in a smart city scenario,discussing the benefits in terms of performance and self-adaptability of our solution.

关键词： Blockchain elasticity Internet of Things(IoT) smart cities smart contracts virtual chains

Anthropomorphism Indexes of the Kinematic Chain for Artificial Hands

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Journal of Bionic Engineering 2020年第3期17卷 501-511页

作者： Immaculada Llop-Harillo antonio Pérez-González Javier Andrés-Esperanza Grupo de Biomecdnicay Ergonomia Departamento de Ingenieria Mecdnicay Construccidny Universitat Jaume I(UJI)Castelldn 12071Spain

Anthropomorphic hands have received increasing research interest in the fields of robotics and *** it is not yet clear how to evaluate their *** in the kinematic chain is essential to achieve both functionality and cosmesis.A few previous works have addressed the definition of anthropomorphism indexes,although they have some limitations in its *** this study,three different anthropomorphism indexes have been defined to compare the kinematic chain of artificial hands with that of the human *** indexes are based on the comparison of:(I)the parameters of the kinematic chain(dimensions,type of joints,orientations and ranges of motion),(2)the reachable workspace,and(3)common grasping *** artificial hands with different degrees of anthropomorphism have been compared using the three Anthropomorphism Indexes of the Kinematic Chain(AIKC).The results show a high correlation between the first and third AIKC for the hands *** second AIKC presents much lower values than the other two,although they are higher for hands that combine abduction/adduction and flexion/extension movements in the kinematic chain of each *** indexes can be useful during the initial stage of designing artificial hands or evaluating their anthropomorphism.

关键词： anthropomorphism grasping indexes kinematics multifingered hands

Interplay between the glass and the gel transition

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science China(Physics,Mechanics & Astronomy) 2019年第10期62卷 45-50页

作者： Annalisa Fierro antonio de Candia antonio Coniglio CNR-sPIN c/o Complesso di Monte S.AngeloNapoli 80126Italy Dipartimento di Fisica"Pancini" Universita di Napoli"FedericoⅡ"Complesso di Monte S.AngeloNapoli 80126Italy

By changing the control parameters, many physical systems reach a slow dynamics regime followed by an arrested or a quasiarrested state. Examples, among others, are gels and glasses. In this paper, we discuss some experimental and theoretical results in polymer and colloidal systems, where gel and glass transitions interfere, and use models from Mode Coupling Theory（MCT）to illustrate the rich phenomenology observed. The continuous and the discontinuous transition lines, found in the MCT models,are considered suitable to describe respectively the gel and the glass transitions, so we suggest that the interplay between gel and glass may be interpreted in terms of the F13 MCT model, clarifying also the origin of logarithmic decays often observed in such systems. In particular, the theoretical predictions of the MCT in the F13 model are compared with Molecular Dynamics simulations in model systems for chemical gels and charged colloids.

关键词： glass gel and sol colloid

Effect of Noisy Fitness in Real-Time strategy Games Player Behaviour Optimisation Using Evolutionary Algorithms

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Journal of Computer science & Technology 2012年第5期27卷 1007-1023页

作者： antonio M. Mora antonio Fernndez-Ares Juan J. Merelo Pablo García-snchez Carlos M. Fernandes Computer Architecture and Technology Department University of Granada Institute for systems and Robotics Technical University of Lisbon

This paper investigates the performance and the results of an evolutionary algorithm （EA） specifically designed for evolving the decision engine of a program （which, in this context, is called bot） that plays Planet Wars. This game, which was chosen for the Google Artificial Intelligence Challenge in 2010, requires the bot to deal with multiple target planets, while achieving a certain degree of adaptability in order to defeat different opponents in different scenarios. The decision engine of the bot is initially based on a set of rules that have been defined after an empirical study, and a genetic algorithm （GA） is used for tuning the set of constants, weights and probabilities that those rules include, and therefore, the general behaviour of the bot. Then, the bot is supplied with the evolved decision engine and the results obtained when competing with other bots （a bot offered by Google as a sparring partner, and a scripted bot with a pre-established behaviour） are thoroughly analysed. The evaluation of the candidate solutions is based on the result of non-deterministic battles （and environmental interactions） against other bots, whose outcome depends on random draws as well as on the opponents＇ actions. Therefore, the proposed GA is dealing with a noisy fitness function. After analysing the effects of the noisy fitness, we conclude that tackling randomness via repeated combats and reevaluations reduces this effect and makes the GA a highly valuable approach for solving this problem.

关键词： real-time strategy game genetic algorithm noisy fitness player behaviour optimisation parameter adaptation

Nanostructural Evolution of sugarcane Rind and Pith submitted to Hydrothermal Pretreatments

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Journal of Renewable Materials 2018年第2期6卷 152-159页

作者： Marcelo M.Oliveira antonio A.s.Curvelo Carlos Driemeier Brazilian Bioethanol science and Technology Laboratory(CTBE) Brazilian Center for Research in Energy and Materials(CNPEM)Caixa Postal 619213083-970CampinasSão PauloBrasil são Carlos school of Engineering(EEsC) University of São Paulo(USP)Caixa Postal 78013560-970São CarlosSão PauloBrasil são Carlos Institute of Chemistry(IQsC) University of São Paulo(USP)Caixa Postal 78013560-970São CarlosSão PauloBrasil

Lignocellulose conversion into cellulosic ethanol and coproducts starts with a pretreatment *** current industrial plants of cellulosic ethanol use thermochemical pretreatments under hydrothermal conditions,with or without addition of acid *** pretreatments modify biomass chemistry and morphology,particularly at the *** this work,we use X-ray diffraction,dynamic vapor sorption and calorimetric thermoporometry to investigate the biomass nanostructural changes promoted by hydrothermal *** compare and differentiate the rind and pith fractions of sugarcane stalks in order to contribute to the understanding of rind-pith contrasting ***,for both cane fractions our results point consistently to cellulose co-crystallization,lignin aggregation,and opening of nanoscale pores as the main nanostructural phenomena occurring during hydrothermal treatments.

关键词： Cellulose bagasse sugarcane cellulosic ethanol pretreatment

Affinity-Based Network Interfaces for Efficient Communication on Multicore Architectures

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Journal of Computer science & Technology 2013年第3期28卷 508-524页

作者： Andrés Ortiz Julio Ortega antonio F.Díaz Alberto Prieto Department of Communications Engineering University of Málaga Department of Computer Architecture and Technology/CITIC University of Granada

Improving the network interface performance is needed by the demand of applications with high communication requirements （for example, some multimedia, real-time, and high-performance computing applications）, and the availability of network links providing multiple gigabits per second bandwidths that could require many processor cycles for communication tasks. Multicore architectures, the current trend in the microprocessor development to cope with the difficulties to further increase clock frequencies and microarchitecture efficiencies, provide new opportunities to exploit the parallelism available in the nodes for designing efficient communication architectures. Nevertheless, although present Os network stacks include multiple threads that make it possible to execute network tasks concurrently in the kernel, the implementations of packet-based or connection-based parallelism are not trivial as they have to take into account issues related with the cost of synchronization in the access to shared resources and the efficient use of caches. Therefore, a common trend in many recent researches on this topic is to assign network interrupts and the corresponding protocol and network application processing to the same core, as with this affinity scheduling it would be possible to reduce the contention for shared resources and the cache misses. In this paper we propose and analyze several configurations to distribute the network interface among the different cores available in the server. These alternatives have been devised according to the affinity of the corresponding communication tasks with the location （proximity to the memories where the different data structures are stored） and characteristics of the processing core. As this approach uses several cores to accelerate the communication path of a given connection, it can be seen as complementary to those that consider several cores to simultaneously process packets belonging to either the same or different connections.

关键词： interrupt affinity processor affinity network interface offioading, sIMICs