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19th International Multidisciplinary Scientific Geoconference, SGEM 2019

作者： rădulescu, delia Mihaela Meghea, Irina rădulescu, Marius Lazaroiu, Gheorghe National Institute for R&D in Informatics Bucharest Romania University Politehnica of Bucharest Department of Energy Production and Use Bucharest Romania Institute of Mathematical Statistics and Applied Mathematics Bucharest Romania

ISBN: (纸本)9786197408768

Last decades witnessed a significant increasing in energy consumption in data centers and server rooms. More powerful equipment and more complex IT services have been driving to more power demand. Since infrastructure and energy costs in data centers have become a central factor in IT management, a range of technologies has been developed to increase energy efficiency. New hardware and power management options support energy saving strategies. An appropriate procurement plan is essential for building an efficient data center. With the rapid changing of technology and limited IT budgets, the procurement of data center equipment can be a difficult and costly task. data center managers have to take into account that the server running costs depend on the energy consumption of servers. In order to perform a sustainable equipment procurement in a data center the managers should take into account the costs of equipment provided by different suppliers, the performance assessed by various criteria and the amount of money available for their purchase. However, the compromise between the cost and performance of equipment is an active domain of research. In the present paper, an optimization model for equipment procurement in a cloud data center is formulated. The model considers several types of equipment for data centers provided by different suppliers and manufacturing firms, their performances and their costs. The equipment performances are evaluated by several experts across several criteria. As a result a matrix of performances is built. A performance optimization model with budget constraints and limits for suppliers offer is formulated. A numerical example is studied. © SGEM 2019.

关键词： Managers

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Time series model applied to predict the wind power energy production 19

Time series model applied to predict the wind power energy p...

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19th International Multidisciplinary Scientific Geoconference, SGEM 2019

作者： Meghea, Irina Mihai, Mihaela rădulescu, delia Mihaela University POLITEHNICA of Bucharest Faculty of Applied Sciences Department of Mathematical Methods and Models Bucharest Romania University POLITEHNICA of Bucharest Faculty of Applied Chemistry and Materials Sciences Department of Chemical Engineering Bucharest Romania National Institute of R&D in Informatics Bucharest Romania

ISBN: (纸本)9786197408768

Wind power, via wind turbine, transforms mechanical energy to electrical energy. It is an alternative to burning fossil fuels, it is plentiful, renewable, widely distributed, clean, produces no greenhouse gas emissions during operation, consumes no water, and uses little surface of land. The net effects on the environment are far less problematic than those of fossil fuel sources. This paper proposes a forecasting model based on time series technique for wind power energy generation. The increasing use of renewable energy from solar and wind sources has gained acceptance and is being increasingly used. The main problems with these energies sources are the dependence of power output on the environmental parameters and the circadian variation. In order to obtain a continuous time series, average daily specific power records, W/m2, are used and moving average and exponential smoothing were tested to evidence the trend and seasonal patterns. The resulting data were correlated in mathematical models which were in good agreement with data collected from a romanian wind power energy plant. © 2019, International Multidisciplinary Scientific Geoconference. All rights received.

关键词： Wind power

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Mucin-mediated mucosal retention via end-terminal modified Pluronic F127-based hydrogel to increase drug accumulation in the lungs

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Biomaterials Advances 2024年 156卷 213722页

作者： Wu, Tsung-Yun Huang, Chun-Chiang Tsai, Hsieh-Chih Lin, Tzu-Kai Chen, Pei-Yu darge, Haile Fentahun Hong, Zhen-Xiang Harn, Horng-Jyh Lin, Shinn-Zong Lai, Juin-Yih Chen, Yu-Shuan Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei106 Taiwan Taiwan Instrument Research Institute National Applied Research Laboratories Hsinchu302 Taiwan Advanced Membrane Materials Center National Taiwan University of Science and Technology Taipei106 Taiwan R&D Center for Membrane Technology Chung Yuan Christian University Taoyuan Chungli320 Taiwan Department of Dermatology Skin Institute Hualien Tzu Chi Hospital Buddhist Tzu Chi Medical Foundation Hualien970 Taiwan Department of Dermatology School of Medicine Tzu Chi University Hualien970 Taiwan Bioinnovation Center Buddhist Tzu Chi Medical Foundation Hualien970 Taiwan School of Optometry and Vision Science University of Waterloo 200 University Avenue West WaterlooONN2L 3G1 Canada Department of Pathology Hualien Tzu Chi Hospital Tzu Chi University Buddhist Tzu Chi Medical Foundation Hualien970 Taiwan Department of Neurosurgery Hualien Tzu Chi Hospital Buddhist Tzu Chi Medical Foundation Hualien970 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan Chungli320 Taiwan Department of Medical Research Hualien Tzu Chi Hospital Buddhist Tzu Chi Medical Foundation Hualien970 Taiwan Tzu Chi University of Science and Technology Hualien970 Taiwan

Noninvasive lung drug delivery is critical for treating respiratory diseases. Pluronic-based copolymers have been used as multifunctional materials for medical and biological applications. However, the Pluronic F127-based hydrogel is rapidly degraded, adversely affecting the mechanical stability for prolonged drug release. Therefore, this study designed two thermosensitive copolymers by modifying the Pluronic F127 terminal groups with carboxyl (AdF127) or amine groups (EdF127) to improve the viscosity and storage modulus of drug formulations. β-alanine and ethylenediamine were conjugated at the terminal of Pluronic F127 using a two-step acetylation process, and the final copolymers were characterized using 1H nuclear magnetic resonance (1H NMr) and Fourier-transform infrared spectra. According to the 1H NMr spectra, Pluronic F127 was functionalized to form AdF127 and EdF127 with 85 % and 71 % functionalization degrees, respectively. rheological studies revealed that the AdF127 (15 wt%) and EdF127 (15 wt%) viscosities increased from 1480 Pa.s (Pluronic F127) to 1700 Pa.s and 1800 Pa.s, respectively. Furthermore, the elastic modulus of AdF127 and EdF127 increased, compared with that of native Pluronic F127 with the addition of 5 % mucin, particularly for AdF127, thereby signifying the stronger adhesive nature of AdF127 and EdF127 with mucin. Additionally, AdF127 and EdF127 exhibited a decreased gelation temperature, decreasing from 33 °C (Pluronic F127 at 15 wt%) to 24 °C. Notably, the in vitro AdF127 and EdF127 drug release was prolonged (95 %;48 h) by the hydrogel encapsulation of the liposome–Bdph combined with mucin, and the intermolecular hydrogen bonding between the mucin and the hydrogel increased the retention time and stiffness of the hydrogels. Furthermore, AdF127 and EdF127 incubated with NIH-3T3 cells exhibited biocompatibility within 2 mg/mL, compared with Pluronic F127. The nasal administration method was used to examine the biodistribution of the modifi

关键词： Hydrogels

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Quantum channel decomposition with pre- and post-selection

arXiv

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arXiv 2023年

作者： Nagai, ryo Kanno, Shu Sato, Yuki Yamamoto, Naoki Center for Exploratory Research Research and Development Group Hitachi Ltd. Kokubunji Tokyo185-8601 Japan Quantum Computing Center Keio University 3-14-1 Hiyoshi Kohoku-ku Kanagawa Yokohama223-8522 Japan Mitsubishi Chemical Corporation Science & Innovation Center Yokohama227-8502 Japan Toyota Central R&D Labs. Inc. 1-4-14 Koraku Bunkyo-ku Tokyo112-0004 Japan Department of Applied Physics and Physico-Informatics Keio University 3-14-1 Hiyoshi Kohoku-ku Yokohama223-8522 Japan

The quantum channel decomposition techniques, which contain the so-called probabilistic error cancellation and gate/wire cutting, are powerful approach for simulating a hard-to-implement (or an ideal) unitary operation by concurrently executing relatively easy-to-implement (or noisy) quantum channels. However, such virtual simulation necessitates an exponentially large number of decompositions, thereby significantly limiting their practical applicability. This paper proposes a channel decomposition method for target unitaries that have their input and output conditioned on specific quantum states, namely unitaries with pre- and post-selection. Specifically, we explicitly determine the requisite number of decomposing channels, which could be significantly smaller than the selection-free scenario. Furthermore, we elucidate the structure of the resulting decomposed unitary. We demonstrate an application of this approach to the quantum linear solver algorithm, highlighting the efficacy of the proposed method. Copyright © 2023, The Authors. All rights reserved.

关键词： Communication channels (information theory)

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Study of CO₂ solubility in bicyclic ionic liquids by thermodynamic properties and FT-Ir spectroscopic analysis at T=(303.15 and 313.15) K

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Chemical Thermodynamics and Thermal Analysis 2021年 3-4卷

作者： Losetty, Venkatramana Yadav, C. Hazarathaiah Wilfred, Cecilia devi Gardas, ramesh L. Department of Chemistry VelTech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Avadi Chennai 600062 India Faculty of Fundamental and Applied Science Universiti Teknologi PETRONAS Bandar Seri Iskandar Perak 32610 Malaysia Department of Chemistry Indian Institute of Technology Madras Chennai 600 036 India

Ionic liquids (ILs) are alternative substances for post-combustion CO2 captures because of their tunable properties are modified in terms of cation and anion alteration. The basicity and fluorination of either cation ... 详细信息

Ionic liquids (ILs) are alternative substances for post-combustion CO₂ captures because of their tunable properties are modified in terms of cation and anion alteration. The basicity and fluorination of either cation or anion of the ILs may increases the CO₂ sorption affinity. In this study, four 1,8-diazabicyclo[5.4.0]undec‑7-ene (dBU) based ILs, namely [dBUAc], [dBUTFA], [dBUMSA] and [dBUTFMSA] were used to study the CO₂ solubility at various pressures and temperatures. From the pressure-concentration-temperature data, Henry's constant (K_H) was predicted to calculate the sorption efficiency of studied ILs. The sign and magnitude of thermodynamic properties such as Henry's constant (K_H), Gibbs free energy (ΔG^o), enthalpy (ΔH^o) and entropy (ΔS^o) are reveals that the efficiency of CO₂ sorption in ILs. The sorption of CO₂ significantly influenced by the temperature and pressure, [dBUAc] showed highest CO₂ sorption efficiency (0.7992 mol/mol IL). The experimental and thermodynamic results are confirmed that the solubility efficiency of CO₂ as follows: [dBUAc] > [dBUTFAc] > [dBUTFMSA] > [dBUMSA]. Finally, FTIr and COSMO-rS analysis were performed to determine the CO₂ sorption efficiency in ILs. © 2021

关键词： CO2 solubility COSMO-rS study FTIr analysis Ionic liquid Thermodynamic function

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Novel Pluronic Polymer-Coated Carbon Black Nanoparticles as Highly Stable and Safe Biocompatible Black Tattoo Pigments

SSRN

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SSrN 2024年

作者： Oh, Hyeryeon Lee, Jin Sil Son, Panmo ryu, Hyeonyeol Kim, On Beol Choi, Won Il Center for Bio-Healthcare Materials Bio-Convergence Materials R&D Division Korea Institute of Ceramic Engineering and Technology 202 Osongsaengmyeong 1-ro Osong-eup Heungdeok-gu Chungbuk Cheongju28160 Korea Republic of School of Materials Science and Engineering Gwangju Institute of Science and Technology 123 Cheomdan-gwagiro Buk-gu Gwangju61005 Korea Republic of Department of Applied Bioengineering Graduate School of Convergence Science and Technology Seoul National University Seoul08826 Korea Republic of Korea Conformity Laboratories 8 Gaetbeol-ro 145 beon-gil Yeonsu-gu Incheon21999 Korea Republic of Gbionic Corp. 101-1204 Harmony-ro Yeonsu-gu Incheon144 Korea Republic of

The tattoo industry has evolved in recent decades with the increasing prevalence of tattooing. However, developing ink components, specifically pigments with adequate stability and biocompatibility under physiological conditions, remains challenging. In this study, to develop safe pigments for tattoo inks, carbon black (CB) has been stabilized with different types of Pluronic polymers and characterized in vitro and in vivo. The effects of the polymer templates on the preparation, morphology, and properties of Pluronic-coated carbon black nanoparticles (CB/Plu NPs) have been investigated and optimized using various analytical techniques. In particular, CB/Plu NPs with PF127 at a weight ratio of 1:5 exhibit a high coating yield and dispersion stability. CB/Plu NPs with PF127 have a spherical morphology with uniform sizes of 158 nm and do not cause any cytotoxic effect, cellular morphological changes, or oxidative stress in vitro. Intradermally injected CB/Plu NPs maintain an intense black color for 16 weeks without causing histological changes in the isolated dorsal skin of rats. Our results suggest that aqueous dispersions of CB/Plu NPs can be used as black tattoo inks exhibiting enhanced stability and safety. © 2024, The Authors. All rights reserved.

关键词： Nanoparticles

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ZnO-based thin-film transparent contacts for applications in perovskite solar cells

ZnO-based thin-film transparent contacts for applications in...

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International Conference on Transparent Optical Networks

作者： P. Plóciennik A. Zawadzka Ismail Elouedghiri Idrissi Zouhair Sofiani K. Wiśniewski A. Laouid A. Marjanowska Z. Łukasiak Institute of Engineering and Technology Faculty of Physics Astronomy and Informatics Nicolaus Copernicus University in Toruń Grudziadzka 5 87-100 Toruń Poland Centre for Modern Interdisciplinary Technologies Nicolaus Copernicus University in Torun Wilenska 4 87-100 Torun Poland National School of Applied Sciences Engineering Science for Energy Laboratory Chouaib Doukkali University of El Jadida El Jadida Morocco Institute of Physics Faculty of Physics Astronomy and Informatics Nicolaus Copernicus University in Toruń Grudziadzka 5 87-100 Toruń Poland Faculty of Science and Technologies (FST) University of Hassan II Casablanca Mohammedia Morocco R&D Department Polna 133 PL 87-100 Archimedes Sp. z o.o Torun Poland

ISBN: (数字)9798350377323

ISBN: (纸本)9798350377330

The paper presents research on the fabrication and electrical characterization of transparent contacts based on ZnO. Contact layers were manufactured in the process of physical vapor deposition (PVd) by the codeposition method, which allowed to obtain thin layers with various compositions and parameters. The evaporation unit NANO36 (Kurt&Lesker) allows real-time control of such parameters as the rate of layer growth, the composition of the obtained structure and its resultant *** tests of the current-voltage characteristics were performed by typical source measure unit KEITHLEY 4200-scs system. Surface analysis was performed using an AFM microscope. The structures can be used in thin-film cells and are an alternative to ITO contacts.

关键词： II-VI semiconductor materials Surface resistance Photovoltaic cells Current measurement Contacts Physical vapor deposition Optical fiber networks

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Loosening Behavior of ripped Nuts Based on the Fastener Tightening Strategy and Plate Hardness

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Procedia Structural Integrity 2020年 28卷 1267-1275页

作者： Barış Tanrıkulu Sezgin Yurtdaş M. Burak Toparli Cenk Kılıçaslan Umut İnce Norm Cıvata R&D Center Norm Cıvata San ve Tic A.Ş. A.O.S.B. Izmır Turkey The Graduate School of Natural and Applied Science Dokuz Eylul University Izmir Turkey Mechanical Engineering Department Katip Çelebi University Izmır Turkey

Within the scope of this study, loosening behavior under vibration was investigated depending on the plate hardness, clamp length and tightening strategy of M8x1.25 10.9 quality nuts with rip form under flange. Two different plate hardness were used and two different types of tightening strategy, i.e. application of torque to either from bolt head or nut, were carried out by using bolts with 29 mm and 40 mm clamp length. during tightening, the effects created by rips on the plate were examined. A parametric study was also carried out to understand loosening behavior of fasteners depending on the plate hardness. Based on the experimental study, it was shown that plate hardness, clamp length and tightening strategy played a key role on the loosening behavior of fasteners. To decrease the loosening rate of the assembly on softer plate, nut with rip form should be tightened from the bolt element. However, for harder plates the selection of tightening strategy was less significant compared to that of softer plate.

关键词： Fastener Loosening Vibration ripped Nut Tightening strategy

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Modulating structural oxygen/crystallinity enables ambient cascade photo-upgrading of biomass saccharides to lactic acid

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Carbon Energy 2025年第03期 96-114页

作者： Jinshu Huang Yan ding Jie Li Zhao Hu Shunmugavel Saravanamurugan Junqi Wang Yaqiong Su Song Yang Hu Li State Key Laboratory of Green Pesticide Key Laboratory of Green Pesticide & Agricultural Bioengineering Ministry of Education State-Local Joint Laboratory for Comprehensive Utilization of Biomass Center for R&D of Fine Chemicals Guizhou University Laboratory of Bioproduct Chemistry Centre of Innovative and Applied Bioprocessing (CIAB) Department of Earth and Environmental Science School of Human Settlements and Civil Engineering Xi'an Jiaotong University School of Chemistry Engineering Research Center of Energy Storage Materials and Devices of Ministry of Education National Innovation Platform(Center) for Industry-Education Integration of Energy Storage Technology Xi'an Jiaotong University

Photocatalytic transformation of biomass into biofuels and value-added chemicals is of great significance for carbon neutrality. Metal-free carbon nitride has extensive applications but with almost no absorption and utilization of near-infrared light, accounting for 50% of sunlight. Here, a molten salt-assisted in-plane “stitching” and interlayer “cutting” protocol is developed for constructing a highly crystalline carbon nitride catalyst containing structural oxygen（HC-CN）. HC-CN is highly efficient for the photothermal cascade transformation of biomass-derived glucose into lactic acid（LA） with an unprecedented yield（94.3%） at 25°C under full-spectrum light irradiation within 50 min, which is also applicable to quantitatively photo-upgrading various saccharides. Theoretical calculations expound that the light-induced glucose-to-catalyst charge transfer can activate the Cβ–H bond to promote the rate-determining step of intramolecular hydrogen shift in glucose-to-fructose isomerization. Meanwhile, the introduced structural oxygen in HC-CN can not only facilitate the local electric field formation to achieve rapid charge transport/separation and regulate selective ·O2-generation for oriented C3–C4 bond cleavage of fructose but also narrow the energy band gap to broaden the light absorption range of HC-CN, contributing to enhanced LA production without exogenous heating. Moreover, HC-CN is highly recyclable and exhibits negligible environmental burden and low energy consumption, as disclosed by the life cycle assessment. Tailored construction of full-spectrum light adsorption and versatile reaction sites provides a reference for implementing multi-step biomass and organic conversion processes under mild conditions.

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Toward Accurate Post-Born-Oppenheimer Molecular Simulations on Quantum Computers: An Adaptive Variational Eigensolver with Nuclear-Electronic Frozen Natural Orbitals

arXiv

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arXiv 2023年

作者： Nykänen, Anton Miller, Aaron Talarico, Walter Knecht, Stefan Kovyrshin, Arseny Skogh, Mårten Tornberg, Lars Broo, Anders Mensa, Stefano Symons, Benjamin C.B. Sahin, Emre Crain, Jason Tavernelli, Ivano Pavošević, Fabijan Algorithmiq Ltd. Kanavakatu 3C HelsinkiFI-00160 Finland School of Physics Trinity College Dublin College Green Dublin 2 Ireland Department of Applied Physics QTF Centre of Excellence Center for Quantum Engineering Aalto University School of Science AaltoFIN-00076 Finland ETH Zürich Department of Chemistry and Applied Life Sciences Vladimir-Prelog-Weg 1-5/10 Zürich8093 Switzerland Data Science and Modelling Pharmaceutical Sciences R&D AstraZeneca Gothenburg Pepparedsleden 1 MolndalSE-431 83 Sweden Department of Chemistry and Chemical Engineering Chalmers University of Technology Gothenburg Sweden The Hartree Centre STFC Sci-Tech Daresbury WarringtonWA4 4AD United Kingdom IBM Research Europe Hartree Centre STFC Laboratory Sci-Tech Daresbury WarringtonWA4 4AD United Kingdom Department of Biochemistry University of Oxford OxfordOX1 3QU United Kingdom IBM Quantum IBM Research - Zürich Rüschlikon8803 Switzerland

Nuclear quantum effects such as zero-point energy and hydrogen tunnelling play a central role in many biological and chemical processes. The nuclear-electronic orbital (NEO) approach captures these effects by treating selected nuclei quantum mechanically on the same footing as electrons. On classical computers, the resources required for an exact solution of NEO-based models grow exponentially with system size. By contrast, quantum computers offer a means of solving this problem with polynomial scaling. However, due to the limitations of current quantum devices, NEO simulations are confined to the smallest systems described by minimal basis sets whereas realistic simulations beyond the Born-Oppenheimer approximation require more sophisticated basis sets. For this purpose, we herein extend a hardware-efficient AdAPT-VQE method to the NEO framework in the frozen natural orbital (FNO) basis. We demonstrate on H2 and d2 molecules that the NEO-FNO-AdAPT-VQE method reduces the CNOT count by a several orders of magnitude relative to the NEO unitary coupled cluster method with singles and doubles (NEO-UCCSd) while maintaining the desired accuracy. This extreme reduction in the CNOT gate count is sufficient to permit practical computations employing the NEO method - an important step toward accurate simulations involving non-classical nuclei and non-Born-Oppenheimer effects on near-term quantum devices. We further show that the method can capture isotope effects and we demonstrate that inclusion of correlation energy systematically improves the prediction of ∆ZPE. Copyright © 2023, The Authors. All rights reserved.

关键词： Numerical methods

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