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First-principles calculations of the dissolution and coalescence properties of Pt nanoparticle ORR catalysts： The effect of nanoparticle shape

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Nano Research 2015年第5期8卷 1689-1697页

作者： mary Clare Sison Escano Graduate School of Engineering University of Fukui 3-9-1 Bunkyo Fukui 910-8507 Japan

The degradation of Pt nanoparticles （NPs） in fuel cell cathodes leads to the loss of the precious metal catalyst. While the effect of NP size on Pt dissolution has been studied extensively, the influence of NP shape is largely unexplored. Because of the recent development of experimental methods to control the shape of metal NPs, rational guidelines/insights on the shape effects on NP stability are imperative. In this study, first-principles calculations based on density functional theory were conducted to determine the stability of 1-2 nm Pt NPs against Pt dissolution and coalescence with respect to NP shape. Toward dissolution, the stability of the Pt NPs increases in the following order： Hexagonal close-packed 〈 icosahedral 〈 cuboctahedral 〈 truncated octahedral. This trend is attributed to the synergy of the oxygen adsorption strength and the local coordination of the Pt atoms. With respect to coalescence, the size of a NP is related to its propensity to coalesce or detach/migrate to form larger particles. The stability of the Pt NPs was found to increase in the following order： Hexagonal close-packed 〈 truncated octahedral 〈 cuboctahedral 〈 icosahedral, and was correlated with the cohesive energies of the particles. By combining the characteristic stabilities of the shapes, new ＂metal-interfaced＂ Pt-based coreshell architectures were proposed that should be more stable than pure Pt nanoparticles with respect to both dissolution and coalescence.

关键词： Pt nanoparticle ORRcatalyst density functional theory shape dissolution coalescence stability

Extended Evolutionary Fast Learn-to-Walk Approach for Four-Legged Robots

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Journal of Bionic Engineering 2007年第4期4卷 255-263页

作者： Muh. Anshar mary-Anne Williams Innovation and Technology Research Laboratory Faculty of Information Technology University of Technology Sydney City Campus 15 Broadway Ultimo NSW 2007 Australia

Robot locomotion is an active research area. In this paper we focus on the locomotion of quadruped robots. An effective walking gait of quadruped robots is mainly concerned with two key aspects, namely speed and stability. The large search space of potential parameter settings for leg joints means that hand tuning is not feasible in general. As a result walking parameters are typically determined using machine learning techniques. A major shortcoming of using machine learning techniques is the significant wear and tear of robots since many parameter combinations need to be evaluated before an optimal solution is found. This paper proposes a direct walking gait learning approach, which is specifically designed to reduce wear and tear of robot motors, joints and other hardware. In essence we provide an effective learning mechanism that leads to a solution in a faster convergence time than previous algorithms. The results demonstrate that the new learning algorithm obtains a faster convergence to the best solutions in a short run. This approach is significant in obtaining faster walking gaits which will be useful for a wide range of applications where speed and stability are important. Future work will extend our methods so that the faster convergence algorithm can be applied to a two legged humanoid and lead to less wear and tear whilst still developing a fast and stable gait.

关键词： legged-robots locomotion learning genetic convergence walking gaits

Annus mirabilis : 1905, Albert Einstein, and the theory of relativity / John Gribbin and mary Gribbin.

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Use of metaphors when treating unexplained medical symptoms

2005年

作者： John Gribbin and mary Gribbin.

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World Journal of Clinical Cases 2023年第2期11卷 332-341页

作者： mary V Seeman Department of Psychiatry University of TorontoToronto M5S 1A1OntarioCanada

The words one chooses to describe personal pain mirror current usage, but may also hold echoes of an individual’s lived experience. They may provide clues to the origin of physical symptoms that are medically hard to explain. The aim of this commentary is to propose, on the basis of the available literature, that verbal metaphors can prove effective in the psychotherapy of such conditions. I provide a case history of a 45 year old woman referred to psychiatry because of extreme ‘burning’ pain in her mouth and tongue. She had been to numerous doctors, had undergone a variety of tests, had tried many medical treatments, and had been prescribed a number of different pharmaceutical agents. She had changed her diet, done her daily dental mouth exercises, drunk a lot of water, but the burning continued and interfered, with her job(she was a teacher), her friendships, and her everyday life. This made her angry and recalcitrant to therapy, but the metaphor ‘burning with rage,’ as applicable to her pain, worked to establish a good alliance that led to a decrease of symptoms. Burning Mouth Syndrome is a medically unexplained condition of complex etiology that psychotherapy alone cannot reverse. The literature bears out, however, that the use of metaphors can help to open avenues of psychological exploration that accelerate adaptation to pain and improve quality life.

关键词： Alexithymia Burning mouth syndrome Idioms of distress Menopause Metaphors Pain

Efficient Approach for Resource Allocation in WPCN Using Hybrid Optimization

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Computers, Materials & Continua 2022年第7期72卷 1275-1291页

作者： Richu mary Thomas Malarvizhi Subramani Department of Electronics and Communication Engineering SRMISTKattankulathur603203India

The recent aggrandizement of radio frequency(RF)signals in wireless power transmission combined with energy harvesting methods have led to the replacement of traditional battery-powered wireless networks since the blooming RF technology provides energy renewal of wireless devices with the quality of service(QoS).In addition,it does not require any unnecessary alterations on the transmission hardware side.A hybridized global optimization technique uniting Global best and Local best(GL)based particle swarm optimization(PSO)and ant colony optimization(ACO)is proposed in this paper to optimally allocate resources in wireless powered communication networks(WPCN)through coordinated operation of communication groups,in which the wireless energy transfer and information sharing take place concomitantly by the aid of a cooperative relay positioned in between the communicating *** designed algorithm assists in minimizing power consumption and maximizes the weighted sum rate at the end-user *** the principal target of the system is coordinated optimization of energy beamforming along with time and energy allocation to reduce the total energy consumed combined with assured information rates of the communication *** outputs are presented to manifest the proposed system’s performance to verify the analytical results via simulations.

关键词： Wireless powered communication networks cooperative communication relay hybrid optimization technique ant colony optimization particle swarm optimization

Prognostic factors for a favorable outcome after varicocele repair in adolescents and adults

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Asian Journal of Andrology 2016年第2期18卷 217-221,J0004页

作者： mary K Samplaski Keith A Jarvi Institute of Urology University of Southern California Los Angeles CA USA Division of Urology Department of Surgery Mount Sinai Hospital University of TorontoToronto Ontario Canada.

The effect of varicocele repair on male fertility remains controversial. It would be helpful to determined which men would benefit most from varicocele repair, and target repair efforts at those individuals. A detailed review of the literature on prognostic factors for varicocele repair was performed using the PubMed NLM database. We found that the best predictor of postvaricocelectomy semen parameters is the preoperative semen parameters. The greatest improvements in semen parameters were found in men with larger varicoceles. While there is controversy, higher testosterone, younger age and larger testis size, in some studies predict for improvements in semen parameters postvaricocelectomy. A nomogram has been developed to predict the postvaricocelectomy semen parameters based on the preoperative semen parameters, varicocele grade and the age of the man （***. com）. Limited data consistently demonstrates the greatest improvements in DNA fragmentation rates in men with higher baseline DNA fragmentation rates. With respect to reproductive outcomes, higher baseline sperm density consistently predicts for natural pregnancy or assisted reproductive technology （ART） pregnancy rates. In addition, varicocele repair does seem to reduce the need for more invasive modalities of ART. In conclusion, we can now start to use specific parameters such as baseline semen quality, varicocele grade and patient age to predict post-repair semen oualitv and fertility potential following varicocelectomy.

关键词： prediction prognosis varicocelectomy varicoceles

Outlier detection in neutrosophic sets by using rough entropy based weighted density method

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CAAI Transactions on Intelligence Technology 2020年第2期5卷 121-127页

作者： Tamilarasu Sangeetha Geetha mary Amalanathan SCOPE Vellore Institute of TechnologyVelloreIndia

Neutrosophy is the study of neutralities,which is an extension of discussing the truth of *** logic can be applied to any field,to provide the solution for indeterminacy *** of the real-world data have a problem of inconsistency,indeterminacy and *** sets provide a solution for uncertainties,and intuitionistic fuzzy sets handle incomplete information,but both concepts failed to handle indeterminate *** handle this complicated situation,researchers require a powerful mathematical tool,naming,neutrosophic sets,which is a generalised concept of fuzzy and intuitionistic fuzzy *** sets provide a solution for both incomplete and indeterminate *** has mainly three degrees of membership such as truth,indeterminacy and *** values are obtained from the three degrees of membership by cut relation *** items which contrast from other objects by their qualities are *** weighted density outlier detection method based on rough entropy calculates weights of each object and *** the obtained weighted values,the threshold value is fixed to determine *** analysis of the proposed method has been carried out with neutrosophic movie dataset to detect outliers and also compared with existing methods to prove its performance.

关键词： method. entropy incomplete

The Impact of the Inclusion of MgO Nano-Fillers in a Polyethylene Matrix on Dielectric Strength and Resistance to Partial Discharges

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Avoid Suspicious Route of Blackhole Nodes in MANET’s:Using A Cooperative Trapping

Open Journal of Applied Sciences（应用科学） 2024年第3期 626页

作者： Virginie Griseri Dominique mary David Malec Eric David

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Computer Systems Science & Engineering 2023年第5期45卷 1901-1915页

作者： Abdllkader Esaid mary Agoyi Department of Computer Engineering Faculty of EngineeringCyprus International UniversityNicosiaCyprus Information Technology Department School of Applied SciencesCyprus International UniversityNicosiaCyprus

Mobile Ad hoc Network(MANET)is decentralized wireless network and can communicate without existing infrastructure in many *** is vulnerable to various attacks that affect its performance such as blackhole *** attacker,inject fault routing information to persuade the source node to select the path with malicious node as the shortest *** eliminate malicious nodes from launching any collaborative attack.A cooperative Trapping Approach(CTA)was proposed based on modifying Ad-hoc On-demand Distance Vector(AODV)routing protocol and trapping the malicious nodes by responding to the trap request *** approach aims to eliminate and rule out both single and collaborative malicious blackhole nodes from any *** approach realizes a backward tracking mechanism to perform the elimination *** proposed algorithm(CTA)was executed using NS-2 network *** performance metrics that has been considered to evaluate the performance of the proposed algorithm such as throughput,end to end delay,packet delivery ratio,and consuming *** experimental results have shown the performance metrics of the proposed approach outperformed other state of at algorithms.

关键词： AODV Blackhole MANET Malicious node