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Journal of Energy Chemistry 2019年第3期28卷 162-169页

作者： Enrico Catizzone massimo Migliori Antonio Purita Girolamo Giordano Department of Environmental and Chemical Engineering University of Calabria

The catalytic conversion of methanol to dimethyl ether(DME) over a series of home-made FER-type zeolites having different acidities and commercial γ-Al_2O_3 has been studied with the aim to understand the impact of adding water in the reactant stream on the catalytic behavior on investigated materials. Cofeeding water with methanol, the alcohol conversion was slightly reduced over the investigated zeolites while the catalytic activity of γ-Al_2O_3, the traditional catalyst of MeOH-to-DME conversion, was strongly inhibited. It was also found that, for the investigated zeolites, both the amount and the initial deposition rate of the coke formed during the reaction were reduced when water was co-fed with methanol while no significant effects on both methanol conversion and DME selectivity were observed under the investigated conditions.

关键词： Ferrierite Zeolites Methanol dehydration Dimethyl ether Coke

The effect of FER zeolite acid sites in methanol-to-dimethyl-ether catalytic dehydration

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Journal of Energy Chemistry 2017年第3期26卷 406-415页

作者： Enrico Catizzone Alfredo Aloise massimo Migliori Girolamo Giordano Department of Environmental and Chemical Engineering University of CalabriaVia P.BucciCubo 42aI-87036 RendeCSItaly

In this paper, the effect of acidity of zeolites with FER framework was studied in the methanol dehydration to dimethyl ether reaction, by comparing catalysts with different Si/Al ratios(namely 8, 30 and60). The aim of this work was to investigate how the acid sites concentration, strength, distribution and typology(Br?nsted and Lewis) affect methanol conversion, DME selectivity and coke formation. It was found that the aluminium content affects slightly acid sites strength whilst a relevant effect on acid sites concentration and distribution(Br?nsted/Lewis) was observed as 24% of Lewis sites were found on Alrichest samples, whilst less than 10% of Lewis acid sites were observed on FER at higher Si/Al ratio. All the investigated catalyst samples showed a selectivity toward DME always greater than 0.9 and samples with the lowest Si/Al ratio exhibit the best performances in terms of methanol conversion, approaching the theoretical equilibrium value(around 0.85) at temperatures below 200 °C. Turnover-frequency analysis suggests that this result seems to be related not only to the higher amount of acid sites but also that the presence of Lewis acid sites may play a significant role in converting methanol. On the other hand, the presence of Lewis acid sites, combined with a high acidity, promote the formation of by-products(mainly methane) and coke deposition during the reaction. As final evidence, all the investigated catalysts exhibit very high resistance to deactivation by coke deposition, over 60 h continuous test, and a GC–MS analysis of the coke deposited on the catalyst surface reveals tetra-methyl benzene as main component.

关键词： Methanol dehydration Dimethyl ether Lewis acid sites FER zeolite Coke formation

Survivals after liver transplantation for hepatocellular carcinoma:Granular data for a better allocation process?

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Hepatobiliary & Pancreatic Diseases International 2018年第4期17卷 374-375页

作者： Quirino Lai massimo Rossi Hepato-bilio-pancreatic and Liver Transplant Unit Department of SurgerySapienza University of Rome

To the Editor:A large international study has been recently published focusing on the combination of morphological aspects and alpha-fetoprotein(AFP)as predictors of survival in patients with hepatocellular cancer(HCC)treated with liver transplantation(LT)[1].As a matter of fact,morphology and biology represent the two sides of the same

关键词： AFP HCC Survivals after liver transplantation for hepatocellular carcinoma:Granular data for a better allocation process

The Death of the Reader： Meaning in the Era of Digital Narcissism

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Language and Semiotic Studies 2018年第3期4卷 72-83页

作者： massimo Leone University of Turin Italy

Roland Barthes' s famous essay on the "Death of the Author" inaugurated an intense reflection on the progressive dwindling of the importance of the traditional biographic idea of "author" in the activity of receiving and interpreting a text, especially a literary one. In the new epistemic era favored by the emergence and affirmation of structuralism, the meaning of a text was, indeed, no longer seen as stemming from an individual agency but from the social dimensions of language and culture. As digital communication is progressively supplanting many forms of non-digital meaning transmission, though, present-day semiospheres are confronted with a different scenario: on the one hand, "empirical" authors are actually becoming more and more prominent, meaning that audiences are starving for non-digital and "auratic" experiences of encounter with meaning, minding more meeting with authors, for instance, than reading their novels; on the other hand, given the easiness of meaning production with digital technology, the same cultures are going through a progressive "agony of the reader": individuals are so intent in creating new particles of meaning, with impatient and daily frenzy, that they never become patient readers of other people's meaning creations, especially if these challenge the instantaneousness that characterizes the contemporary digital communication. The shortness of present-day meaning creation and its lack of audience is bound to change the entire semiosphere. The essay aims at foreseeing some of these changes, pinpointing one of the main features of Narcissism in the digital era.

关键词： semiotics author reader work digital communication

The main tasks of a semiotics of artificial intelligence

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Language and Semiotic Studies 2023年第1期9卷 1-13页

作者： massimo Leone University of Turin TurinItaly Shanghai University ShanghaiChina University of Cambridge CambridgeEngland and Bruno Kessler Foundation TrentoItaly

The article indicates the essential tasks of a semiotics of artificial intelligence:studying the way it simulates the expression of intelligence;the way it produces content that is creatively endowed;the ideological assumptions of artificial intelligence within the culture that produces *** intelligence is,from a semiotic point of view,the predominant technology of fakery in the current *** the strength of its studies on the false,semiotics can therefore also be applied to the analysis of the fake that,in increasingly sophisticated forms,is produced through artificial intelligence and through the deep learning of neural *** article focuses on the adversarial ones,trying to highlight their ideological assumptions and cultural developments,which seem to indicate the entry of human societies and cultures into the‘realm of the absolute fake'.

关键词： fake generative adversarial networks simulation undecidability of the digital fake

Li Bai and Modernity: Drinking with Tao Qian

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Journal of Foreign Languages and Cultures 2020年第2期4卷 122-133页

作者： massimo Verdicchio University of Alberta

In this essay I examine Li Bai’s relationship with Tao Qian/Yuanming,his poetic ancestor,through their poems on drinking and on the Double Nine *** Bai's invitation to share wine with Tao takes the form of emulating his *** also shows its impossibility,which is expressed in the form of unfulfilled *** awareness is what defines the modernity of Li Bai's poetry.

关键词： Paula Varsano Tao Yuanming/Tao Li Bai Double Nine Festival

Face-to-Face:The Semiotics of Online Teaching(or,in Praise of the Classroom)

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Language and Semiotic Studies 2021年第1期7卷 34-56页

作者： massimo Leone the Department of Philosophy and Educational Sciences University of TurinItaly Department of Chinese Language and Literature Shanghai UniversityChina

The paper consists in an in-depth semiotic analysis of the spatiality of present-day online teaching as compared with that of the traditional *** spatiality,the paper contends,cannot be properly digitalized,because it is strictly dependent on *** embodied spatiality of a classroom,it is argued,is nevertheless fundamental to bring about the ritual transfiguration that underpins the didactic experience and its socio-cultural ***,the urgent need to rethink digital teaching environments in relation to these crucial lacks,which only semiotics,with its specific attention to non-verbal elements of communication—including spatiality—is fully equipped to detect.

关键词： online teaching classroom spatiality temporality edusemiotics COVID-19 digitalization

Current status of first-line therapy,anti-angiogenic therapy and its combinations of other agents for unresectable hepatocellular carcinoma

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World Journal of Gastrointestinal Oncology 2021年第12期13卷 2038-2049页

作者： Saleh A Alqahtani massimo G Colombo Division of Gastroenterology and Hepatology Johns Hopkins UniversityBaltimoreMD 21287United States Liver Transplant Center and BiostatisticsEpidemiologyand Scientific Computing DepartmentKing Faisal Specialist Hospital&Research CenterRiyadh 11564Saudi Arabia Liver Center IRCCS San Raffaele HospitalMilan 20132Italy

Globally,hepatocellular carcinoma(HCC)is a frequently diagnosed malignancy with rapidly increasing incidence and mortality ***,many of these patients are diagnosed in the advanced stages when locoregional treatments are not *** 2008,no effective drug treatments existed to prolong survival,until the breakthrough multi-tyrosine kinase inhibitor(TKI)sorafenib was *** remained the standard treatment option for advanced HCC for 10 years,with a battery of other candidate drugs in clinical trials failing to produce similar efficacy *** 2018,the REFLECT trial introduced another multi-TKI,lenvatinib,which has non-inferior overall survival compared with ***,offering patients and their treating physicians two effective treatment ***,immunotherapy-based drugs,such as atezolizumab and bevacizumab,have shown promising results in patients with unresectable *** review summarizes clinical trial and real-world data studies of sorafenib and lenvatinib in patients with unresectable *** offer guidance on the optimal choice between the two treatments and discuss the potential of immunotherapy-based combination;when more data become available,this will likely make the choice between sorafenib and lenvatinib somewhat obsolete.

关键词： Hepatocellular carcinoma Immune checkpoint inhibitor Lenvatinib Multityrosine kinase inhibitor Sorafenib

Improved Parameterization of Snow Albedo in WRF+Noah:Methodology Based on a Severe Snow Event on the Tibetan Plateau

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Advances in Atmospheric Sciences 2022年第7期39卷 1079-1102页

作者： Lian LIU massimo MENENTI Yaoming MA Weiqiang MA Land-Atmosphere Interaction and its Climatic Effects Group State Key Laboratory of Tibetan Plateau Earth SystemResources and Environment(TPESRE)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Remote Sensing Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100094China Delft University of Technology Delft 2600AANetherlands College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China College of Atmospheric Science Lanzhou UniversityLanzhou 730000China National Observation and Research Station for Qomolongma Special Atmospheric Processes and Environmental Changes Dingri 858200China Kathmandu Center of Research and Education Chinese Academy of SciencesBeijing 100101China China-Pakistan Joint Research Center on Earth Sciences Chinese Academy of SciencesIslamabad 45320Pakistan

Snowfall and the subsequent evolution of the snowpack have a large effect on the surface energy balance and water cycle of the Tibetan Plateau(TP).The effects of snow cover can be represented by the WRF coupled with a land surface *** widely used Noah scheme is computationally efficient,but its poor representation of albedo needs considerable *** this study,an improved albedo scheme is developed using a satellite-retrieved albedo that takes snow depth and age into *** experiments were then conducted to simulate a severe snow event in March *** performance of the coupled WRF/Noah model,which implemented the improved albedo scheme,is compared against the model’s performance using the default Noah albedo scheme and against the coupled WRF/CLM that applied CLM albedo *** the improved albedo scheme is implemented,the albedo overestimation in the southeastern TP is reduced,reducing the RMSE of the air temperature by 0.7°*** improved albedo scheme also attains the highest correlation between the satellite-derived and the model-estimated albedo,which provides for a realistic representation of both the snow water equivalent(SWE)spatial distribution in the heavy snowbelt(SWE>6 mm)and the maximum SWE in the eastern *** underestimated albedo in the coupled WRF/CLM leads to underestimating the regional maximum SWE and a consequent failure to estimate SWE in the heavy snowbelt *** study demonstrates the feasibility of improving the Noah albedo scheme and provides a theoretical reference for researchers aiming to improve albedo schemes further.

关键词： WRF MODIS severe snowfall albedo scheme SWE Tibetan Plateau

Excavation compensation and bolt support for a deep mine drift

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3206-3220页

作者： Longji Guo Zhigang Tao Manchao He massimo Coli State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing100083China School of Mechanics&Civil Engineering China University of Mining and Technology(Beijing)Beijing100083China Department of Earth Sciences University of FlorenceFirenze50121Italy

To overcome large deformation of deep phosphate rock roadways and pillar damage,a new type of constant-resistance large-deformation negative Poisson’s ratio(NPR)bolt that can withstand a high prestress of at least 130 KN was *** the conducted tests,the amount of deformation was 200-2000 mm,the breaking force reached 350 KN,and a high constant-resistance pre-stress was maintained during the deformation process.A stress compensation theory of phosphate rock excavation based on NPR bolts is proposed together with a balance system for bolt compensation of the time-space effect and high NPR *** split-set rock bolts are unable to maintain the stability of roadway roofs and *** verify the support effect of the proposed bolt,field tests were conducted using both the proposed NPR bolts and split-set rock bolts as support systems on the same mining *** addition,the stress compensation mechanism of roadway mining was simulated using the particle flow code in three dimensions(PFC^(3D))-fast Lagrangian analysis of continua(FLAC^(3D))particle-flow coupling numerical ***-site monitoring and numerical simulations showed that the NPR excavation compensation support scheme effectively improves the stress state of the bolts and reduces the deformation of the surrounding *** to the original support scheme,the final deformation of the surrounding rock was reduced by approximately 70%.These results significantly contribute to domestic and foreign research on phosphate-rock NPR compensation support technology,theoretical systems,and engineering practices,and further promote technological innovation in the phosphate rock mining industry.

关键词： Deep phosphate rock NPR bolt Split-set rock bolt PFC3D-FLAC3D Compensation support