Bibliographies thématiques / CO2RR

Littérature scientifique sur le sujet « CO2RR »

Auteur : Grafiati
Publié le 14 mars 2023
Mis à jour le 1 avril 2023

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Articles de revues sur le sujet "CO2RR"

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Zhao, Shuangyang, Aihua Liu, Yonghe Li, Yanyan Wen, Xiaoqian Gao et Qiaoli Chen. « Boosting the Electrocatalytic CO2 Reduction Reaction by Nanostructured Metal Materials via Defects Engineering ». Nanomaterials 12, no 14 (13 juillet 2022) : 2389. http://dx.doi.org/10.3390/nano12142389.

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Electrocatalytic CO2 reduction reaction (CO2RR) is one of the most effective methods to convert CO2 into useful fuels. Introducing defects into metal nanostructures can effectively improve the catalytic activity and selectivity towards CO2RR. This review provides the recent progress on the use of metal nanomaterials with defects towards electrochemical CO2RR and defects engineering methods. Accompanying these ideas, we introduce the structure of defects characterized by electron microscopy techniques as the characterization and analysis of defects are relatively difficult. Subsequently, we present the intrinsic mechanism of how the defects affect CO2RR performance. Finally, to promote a wide and deep study in this field, the perspectives and challenges concerning defects engineering in metal nanomaterials towards CO2RR are put forward.
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Kang, Mavis, Manuel Kolb, Federico Calle-Vallejo et Boon Siang Jason Yeo. « Tandem Electrochemical Conversion of CO2 to Liquid Fuels and Chemical Feedstocks ». ECS Meeting Abstracts MA2022-01, no 36 (7 juillet 2022) : 1615. http://dx.doi.org/10.1149/ma2022-01361615mtgabs.

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Increasing demand for energy has led to a high dependence on fossil fuels, which are limited and have been closely associated with major environmental issues such as groundwater pollution and imbalances in the carbon cycle. A more sustainable and cleaner method of producing chemicals and fuels is the electrochemical CO2 reduction reaction (CO2RR). When coupled with renewable electricity, CO2 can be converted to high energy density fuels and commodity chemicals, such as ethanol, propanol, and ethylene, in an environmentally friendly way. Recently, the use of CO feedstocks, instead of CO2, was shown to enhance the selectivity toward multi-carbon products on copper-based electrocatalysts. Technoeconomic analyses have also demonstrated that CO can be produced from CO2RR cost-effectively. This has led to increased efforts in developing tandem electrocatalytic systems. However, state-of-the-art CO2-to-CO electrocatalysts are based on expensive noble metals such as Ag and Au, while earth-abundant Zn displays relatively poorer selectivity and activity. Herein, we show that oxide-derived Zn with high surface area can reduce CO2 to CO with a Faradaic efficiency of 86% and a partial current density (j CO) of −201 mA cm-2. While oxygen vacancies were previously implicated for CO2RR to CO, we pinpointed by detailed experiments and density functional theory calculations that highly undercoordinated Zn sites provide even higher activity, in view of their nearly optimal *COOH adsorption energies. These findings indicate that suitably engineered ZnO-derived materials can potentially be an alternative to the more costly Ag and Au electrocatalysts, and that the main guideline for their design is to increase the undercoordination of the catalytic sites. We also investigate the electrochemical CO reduction reaction (CORR) to liquid fuels and industrial feedstocks on copper-based and mixed copper-silver catalysts. To further enhance the CORR activity and product selectivities, a systematic optimization of the experimental environment, such as the use of various supports, catalyst binder and electrolytes, was done. We develop a set of experimental conditions for optimal CORR performance to value-added products.
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Guo, Gengzhan, Tianyang Wang et Yuzhe Wang. « Utilizing Metal-Organic Frameworks to Achieve High-Efficiency CO2 Electroreduction ». Journal of Physics : Conference Series 2254, no 1 (1 avril 2022) : 012025. http://dx.doi.org/10.1088/1742-6596/2254/1/012025.

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Abstract Electrochemical CO2 reduction reaction (CO2RR) is the key part of clean energy generation and utilization, which has great potential to help the world to reach the carbon-neutral energy cycle in the future. In line with the development of metal-organic frameworks (MOFs) with the large specific area and considerable porosity in the past two decades, some of the MOF-based electrocatalysts have shown superior ability to accelerate CO2RR. However, regarding such a significant CO2RR process, some critical disadvantages, including inferior robustness, low yield and selectivity, and idealistic working environment, are still required to be concentrated on. Herein, a comprehensive outline of the reaction mechanism of CO2 conversion and rational synthesis of the state-of-the-art pristine MOFs is given. Further, recent progress of pristine MOF-based electrocatalysts in CO2RR is systematically summarized. Lastly, the major limitations and future opportunities in MOF electrocatalysis for CO2RR are presented.
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Lu, Qingqing, Kamel Eid et Wenpeng Li. « Heteroatom-Doped Porous Carbon-Based Nanostructures for Electrochemical CO2 Reduction ». Nanomaterials 12, no 14 (12 juillet 2022) : 2379. http://dx.doi.org/10.3390/nano12142379.

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The continual rise of the CO2 concentration in the Earth’s atmosphere is the foremost reason for environmental concerns such as global warming, ocean acidification, rising sea levels, and the extinction of various species. The electrochemical CO2 reduction (CO2RR) is a promising green and efficient approach for converting CO2 to high-value-added products such as alcohols, acids, and chemicals. Developing efficient and low-cost electrocatalysts is the main barrier to scaling up CO2RR for large-scale applications. Heteroatom-doped porous carbon-based (HA-PCs) catalysts are deemed as green, efficient, low-cost, and durable electrocatalysts for the CO2RR due to their great physiochemical and catalytic merits (i.e., great surface area, electrical conductivity, rich electrical density, active sites, inferior H2 evolution activity, tailorable structures, and chemical–physical–thermal stability). They are also easily synthesized in a high yield from inexpensive and earth-abundant resources that meet sustainability and large-scale requirements. This review emphasizes the rational synthesis of HA-PCs for the CO2RR rooting from the engineering methods of HA-PCs to the effect of mono, binary, and ternary dopants (i.e., N, S, F, or B) on the CO2RR activity and durability. The effect of CO2 on the environment and human health, in addition to the recent advances in CO2RR fundamental pathways and mechanisms, are also discussed. Finally, the evolving challenges and future perspectives on the development of heteroatom-doped porous carbon-based nanocatalysts for the CO2RR are underlined.
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Zhang, Yaping, Jixiang Xu, Lei Wang et Banglin Chen. « Multiple roles of metal–organic framework-based catalysts in photocatalytic CO2 reduction ». Chemical Physics Reviews 3, no 4 (décembre 2022) : 041306. http://dx.doi.org/10.1063/5.0099758.

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Photocatalytic CO2 reduction is one of the ideal means to realize the carbon cycle. Metal–organic frameworks (MOFs) have received great attention as catalysts for photocatalytic CO2RR in recent years. The adjustable metal nodes and organic ligands in MOFs make them multifunctional catalysts. Therefore, they can participate in photocatalytic CO2RR in different roles. MOFs can be used as primary photocatalysts or be coupled with other active species to form composite materials. They can also act as co-catalysts to cooperate with photosensitizers. Moreover, MOFs can be used as precursors or templates for the preparation of derived nanomaterials. These derivatives are also promising candidates in photocatalytic CO2RR. This review aims to outline multiple roles of MOFs and their derivatives in photocatalytic CO2RR. Meanwhile, the corresponding modification strategies are summarized. At the end of the manuscript, the present problems of MOFs applied in photocatalytic CO2RR are summarized and the future development and challenges are also proposed.
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Wang, Zhonghao, Rui Shi, Siyu Lu, Kan Zhang et Tierui Zhang. « Atom manufacturing of photocatalyst towards solar CO2 reduction ». Reports on Progress in Physics 85, no 2 (1 février 2022) : 026501. http://dx.doi.org/10.1088/1361-6633/ac4d88.

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Abstract Photocatalytic CO2 reduction reaction (CO2RR) is believed to be a promising remedy to simultaneously lessen CO2 emission and obtain high value-added products, but suffers from the thwarted activity of photocatalyst and poor selectivity of product. Over the past decade, aided by the significant advances in nanotechnology, the atom manufacturing of photocatalyst, including vacancies, dopants, single-atom catalysts, strains, have emerged as efficient approaches to precisely mediate the reaction intermediates and processes, which push forward in the rapid development of highly efficient and selective photocatalytic CO2RR. In this review, we summarize the recent developments in highly efficient and/or selective photocatalysts toward CO2RR with the special focus on various atom manufacturing. The mechanisms of these atom manufacturing from active sites creation, light absorbability, and electronic structure modulation are comprehensively and scientifically discussed. In addition, we attempt to establish the structure–activity relationship between active sites and photocatalytic CO2RR capability by integrating theoretical simulations and experimental results, which will be helpful for insights into mechanism pathways of CO2RR over defective photocatalysts. Finally, the remaining challenges and prospects in this field to improve the photocatalytic CO2RR performances are proposed, which can shed some light on designing more potential photocatalysts through atomic regulations toward CO2 conversion.
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Luévano-Hipólito, Edith, Oscar L. Quintero-Lizárraga et Leticia M. Torres-Martínez. « A Critical Review of the Use of Bismuth Halide Perovskites for CO2 Photoreduction : Stability Challenges and Strategies Implemented ». Catalysts 12, no 11 (11 novembre 2022) : 1410. http://dx.doi.org/10.3390/catal12111410.

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Inspired by natural photosynthesis, the photocatalytic CO2 reduction reaction (CO2RR) stands as a viable strategy for the production of solar fuels to mitigate the high dependence on highly polluting fossil fuels, as well as to decrease the CO2 concentration in the atmosphere. The design of photocatalytic materials is crucial to ensure high efficiency of the CO2RR process. So far, perovskite materials have shown high efficiency and selectivity in CO2RR to generate different solar fuels. Particularly, bismuth halide perovskites have gained much attention due to their higher absorption coefficients, their more efficient charge transfer (compared to oxide perovskites), and their required thermodynamic potential for CO2RR. Moreover, these materials represent a promising alternative to the highly polluting lead halide perovskites. However, despite all the remarkable advantages of bismuth halide perovskites, their use has been limited, owing to instability concerns. As a consequence, recent reports have offered solutions to obtain structures highly stable against oxygen, water, and light, promoting the formation of solar fuels with promising efficiency for CO2RR. Thus, this review analyzes the current state of the art in this field, particularly studies about stability strategies from intrinsic and extrinsic standpoints. Lastly, we discuss the challenges and opportunities in designing stable bismuth halide perovskites, which open new opportunities for scaling up the CO2RR.
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Li, Sanxiu, Yufei Kang, Chenyang Mo, Yage Peng, Haijun Ma et Juan Peng. « Nitrogen-Doped Bismuth Nanosheet as an Efficient Electrocatalyst to CO2 Reduction for Production of Formate ». International Journal of Molecular Sciences 23, no 22 (21 novembre 2022) : 14485. http://dx.doi.org/10.3390/ijms232214485.

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Electrochemical CO2 reduction (CO2RR) to produce high value-added chemicals or fuels is a promising technology to address the greenhouse effect and energy challenges. Formate is a desirable product of CO2RR with great economic value. Here, nitrogen-doped bismuth nanosheets (N-BiNSs) were prepared by a facile one-step method. The N-BiNSs were used as efficient electrocatalysts for CO2RR with selective formate production. The N-BiNSs exhibited a high formate Faradic efficiency (FEformate) of 95.25% at −0.95 V (vs. RHE) with a stable current density of 33.63 mA cm−2 in 0.5 M KHCO3. Moreover, the N-BiNSs for CO2RR yielded a large current density (300 mA cm−2) for formate production in a flow-cell measurement, achieving the commercial requirement. The FEformate of 90% can maintain stability for 14 h of electrolysis. Nitrogen doping could induce charge transfer from the N atom to the Bi atom, thus modulating the electronic structure of N-Bi nanosheets. DFT results demonstrated the N-BiNSs reduced the adsorption energy of the *OCHO intermediate and promoted the mass transfer of charges, thereby improving the CO2RR with high FEformate. This study provides a valuable strategy to enhance the catalytic performance of bismuth-based catalysts for CO2RR by using a nitrogen-doping strategy.
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Iwase, Kazuyuki, Takayuki Kojima, Naoto Todoroki et Itaru Honma. « Activity switching of Sn and In species in Heusler alloys for electrochemical CO2 reduction ». Chemical Communications 58, no 31 (2022) : 4865–68. http://dx.doi.org/10.1039/d2cc00754a.

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Oh, Hyung-Suk, et Chulwan Lim. « Ag Dendrites on W/C as Enhanced Active and Stable Electrocatalysts for Scalable Solar-Driven CO2rr ». ECS Meeting Abstracts MA2022-02, no 48 (9 octobre 2022) : 1866. http://dx.doi.org/10.1149/ma2022-02481866mtgabs.

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The electrochemical conversion of solar energy into competent chemicals is the most efficient technique to ensure clean and sustainable energy source for society in the future. In fact, solar cells can electrochemically produce electricity without pollution by converting CO2 into a variety of chemicals. The carbon dioxide reduction reaction (CO2RR) is an environmentally friendly approach to produce useful hydrocarbons such as carbon monoxide (CO), methane, ethylene, formates, etc and alcohols and remove exhausted CO2, which is a greenhouse gas. Conventionally, studies on the CO2RR have been conducted by using liquid-phase H-cells and a CO2-saturated electrolyte. However, it resulted in a low current density because the low solubility of CO2 in the liquid electrolyte occurs mass transfer limitation. To improve of the current density related to the CO2RR, two types of gas-fed CO2RR electrolyzers containing gas diffusion layer (GDL) electrodes have been proposed. The first type of CO2RR devices use a liquid electrolyte, the electrolyte increases CO2RR performance through controlling the cathode conditions, such as pH and anion concentration. The second type of CO2RR devices is zero-gap electrolyzers that use an anion exchange membrane (AEM) and humidified CO2 gas. AEM transmits carbonate and hydroxide ion, inducing favorable environmental for CO2RR. These zero-gap CO2 electrolyzers are attracting attention as the most promising system owing to several advantages such as extremely low ohmic resistance, scalable and stackable configuration, and commercial applicability, as affirmed by using a system consisting of a fuel cell and water electrolyzer. Among the products of the CO2RR, CO is particularly attractive as aspect of its economic benefits and large demand. Ag-based materials exhibit the most electrochemical performance for producing CO. and high selectivity. To enhance the catalytic activity of Ag-based catalysts, various approaches have been studied to change the surface electronic structure of Ag such as alloy formation, anion-based modification, shape control, near-surface structure and engineering. However, catalyst designs that do not consider the gas phase reactions cannot enough utilize their catalytic activity although recent progress has made in the development of Ag-based catalysts for the CO2RR. Therefore, considerable efforts must be preoccupied with the development of highly active, stable, and gas-transferable structured catalysts for gas-fed CO2RR electrolyzers with incoporating a GDL. Additionally, aming for the realization of clean technology for producing CO, we demonstrate the practicalbility of sunlight-driven CO2RR on a large scale using commercial silicon-based solar cells and zero-gap electrolyzers. Silicon-based solar cells are still the preferred commercially applicapable options for producing large amounts of electrical power from solar energy because of their scalability. In this study, we report a 3D silver dendrite on W/C (as denoted WC@AgD) catalyst with abundant nanograin boundaries that show enhanced CO2RR performance and stability. WC@AgD exhibited marked catalytic activity with a maximum CO partial current density of 400 mA cm-2 and durability for 100 h at 150 mA cm-2. We also fabricated an solar-to-CO (STC) conversion device combined with a silicon-based solar cell of 120 cm2 area and a zero-gap CO2 electrolyzer with an area of 10 cm2. The stand-alone photovoltaic-electrochemical system achieved a solar-to-CO efficiency (ηSTC) of 12.1 % at 1A under AM 1.5 G illumination and realistic outdoor conditions. The device design and electrode configuration extended viable route for implementing large-scale installations for solar-driven production of chemicals. Figure 1
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Thèses sur le sujet "CO2RR"

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SASSONE, DANIELE. « Single metal atom catalysts for the electrochemical reduction of CO2 ». Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2971997.

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Cansian, Fernanda Colombi. « Abordagem fitoquímica, avaliação farmacológica e atividades biológicas de Tynanthus micranthus Corr. Mello ex Schum. (Bignoniaceae) ». reponame:Repositório Institucional da UFPR, 2014. http://hdl.handle.net/1884/37019.

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Orientadora : Profª. Drª. Marilis Dallarmi Miguel
Co-orientador : Prof. Dr. Obdulio Gomes Miguel
Tese (doutorado) - Universidade Federal do Paraná, Setor de Ciências da Saúde, Programa de Pós-Graduação em Ciências Farmacêuticas. Defesa: Curitiba, 30/10/2014
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Área de concentração: Insumos, medicamentos e correlatos
Resumo: O presente trabalho teve como objetivo, ampliar os conhecimentos a respeito da constituição química e atividades biológicas da espécie Tynanthus micranthus Corr. Mello ex Schum. (Bignoniaceae), além de verificar através de ensaios farmacológicos, a atividade afrodisíaca desta planta, conforme sua utilização popular. Após o preparo dos extratos brutos e frações: isolou-se por cromatografia em coluna da fração hexânica das folhas o Dotriacontane e verificou-se sua atividade imunológica através do ensaio com nitroazul de tetrazólio; avaliou-se a atividade hemolítica dos extratos brutos e frações frente hemácias de carneiro; analisou-se a atividade antioxidante das frações hidroalcoólicas remanescentes através de ensaios enzimáticos; e avaliou-se a influência do extrato bruto do caule e folhas sobre o comportamento sexual de camundongos machos adultos. A substância dotriacontane, identificada por Ressonância Magnética Nuclear, demonstrou ativar neutrófilos em todas as concentrações testadas. A fração hexânica do caule apresentou atividade hemolítica sobre hemácias de carneiro, resultado estatisticamente igual ao controle positivo. A fração hidroalcoólica das folhas protegeu os eritrócitos contra o estresse oxidativo, mantendo o nível das enzimas oxidativas em condições normais na análise antioxidante. Na avaliação da atividade afrodisíaca, os animais tratados com os extratos apresentaram uma diminuição sobre a latência de monta, aumento da frequência de monta e melhora na decisão de monta. Os resultados obtidos confirmam a importância em se aprofundar os estudos sobre esta espécie, pouco estudada, além de agregar indícios para a comprovação de sua utilização como planta afrodisíaca. Palavras chave: Cipó cravo, Atividade afrodisíaca, Dotriacontane, Atividade antioxidante, Atividade imunológica, Atividade hemolítica.
Abstract: This work aimed to expand knowledge about the chemical constitution and biological activity of the species Tynanthus micranthus Corr. Mello ex Schum. (Bignoniaceae), and verify through pharmacological tests, the aphrodisiac activity of this plant, as its popular use. After preparation of the crude extracts and fractions: from the hexane extract of the leaves was isolated by column chromatography the dotriacontane, which was tested for its immune activity by testing with nitroblue tetrazolium; the hemolytic activity of extracts and fractions was evaluated against sheep erythrocytes; the antioxidant activity of the remaining hydroalcoholic fractions was analyzed by enzymatic assays; and it was evaluated the influence of the crude extract of the stem and leaves on the sexual behavior of adult male mice. The dotriacontane substance, identified by Nuclear Magnetic Resonance, demonstrated activate neutrophils at all concentrations tested. The hexane extract of the stem showed hemolytic activity on sheep erythrocytes statistically equal to the positive control. The hydroalcoholic fraction of leaves protected the erythrocytes against oxidative stress maintaining the level of oxidative enzymes normal in antioxidant analysis. In assessing the aphrodisiac activity, animals treated with the extracts showed a decrease on the latency of mounts, increased frequency of mounts and improvement at the decision of mount. The results confirm the importance of deepening the studies on this species, little studied, as well as adding evidence to corroborate its use as an aphrodisiac. Keywords: Clove vine, Aphrodisiac activity, Dotriacontane, Antioxidant activity, Immune activity, Hemolytic activity.
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Vaugier, Loig. « Mat��riaux Corr��l��s et Structure Electronique ab initio : interaction de Hubbard et couplage de Hund ». Phd thesis, Ecole Polytechnique X, 2011. http://tel.archives-ouvertes.fr/tel-00730341.

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Cette th��se propose une nouvelle impl��mentation de "l'approximation de la phase al��atoire avec polarisation contrainte" (constrained Random Phase Approximation, cRPA). Notre impl��mentation repose sur la th��orie de la fonctionnelle de la densit��, d��velopp��e dans une base d'ondes planes augment��es (linearized augmented plane wave, LAPW). Cette m��thode, appliqu��e �� des mat��riaux fortement corr��l��s, permet de calculer de facon r��aliste la matrice d'interaction coulombienne effective, qui pourra ��tre trait��e par la suite au moyen de l'approche �� N-corps souhait��e. En particulier, les valeurs de l'interaction de Hubbard, U , et de l'��change de Hund, J, sont d��termin��es de mani��re ab initio, ainsi que leur d��pendance en fr��quence qui r��sulte des effets dynamiques de l'��crantage. Comme dans la th��orie du groupe de renormalisation de Wilson, l'interaction coulombienne effective d��pend du choix du sous-espace corr��l�� pour lequel est construit un Hamiltonien effectif de basse ��nergie, alors que les valeurs des observables physiques n'en d��pendent pas. Afin de g��n��raliser la cRPA aux mat��riaux dont la structure ��lectronique exhibe des or- bitales corr��l��es et itin��rantes intriqu��es, une m��thode bas��e sur la projection sur le sous-espace corr��l�� est ��galement introduite. Diff��rentes classes de mat��riaux sont envisag��es comme applications : i) pnictures �� base de fer, LaOFeAs et BaFe2As2, et chalcog��nides, FeSe (Chapitre 6), ii) m��taux de transition 3d afin de valider notre m��thode de projection (Chapitre 6), iii) oxydes de m��taux de transition p��rovskites, SrMO3 (M = V, Cr, Mn, Nb, Mo, Tc), et p��rovskites en couches, Sr2MO4 (M = Mo, Tc, Ru, Rh) (Chapitre 7). L'Hamiltonien d'interaction cRPA est ��galement coupl�� �� la th��orie du champ moyen dynamique (LDA+cRPA+DMFT) afin de d��crire l'isolant de Mott induit par le couplage spin-orbite, Sr2IrO4, et le pigment �� base de terre rare, CeSF (Chapitre 8).
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Wang, Yun, et Wenxuan Jiang. « Statistical Processing of IEEE 802.15.4 Data Collected in Industrial Environment ». Thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-19619.

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Wireless sensor network, which is constitute of autonomous sensors, is used for monitoring physical or environmental conditions like temperature, sound, pressure, and so on. The dispersed sensors or nodes will respectively pass their data through the network to the main location. Currently, several standards are ratified or in developing for wireless sensor network, like Wireless Hart, ISA, 100.11a, WIA-PAA, IEEE 802.15.4, etc. Among the standards, Zigbee is often used in industrial applications that require short-range and low-rate wireless transfer. In the research, all the data is collected under industrial environment using IEEE 802.15.4 compliant physical layer, some packets are interfered only by multi-path fading while others are also interfered by Wi-Fi interference. The goal of the thesis is to find out the dependence between the received power (RSS), correlation value (CORR) and bit error rate (BER) of the received message, and their distribution in situations both when the packet is lost or not. Besides, the performance of bit error rate such as the distribution and the features of burst error length under Wi-Fi interference or not will also be tested. All of them are based on a precise statistical processing.
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Sa, Ting. « Object Similarity through Correlated Third-Party Objects ». Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1219284798.

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Verret, Simon. « Couplage interplan et comp??tition de phases dans le mod??le de Hubbard des cuprates ». Mémoire, Universit? ? de Sherbrooke, 2014. http://savoirs.usherbrooke.ca/handle/11143/79.

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Il y a presque trente ans, un des probl??mes les plus difficiles de la physique moderne voyait le jour: la supraconductivit?? ?? haute temp??rature critique dans les cuprates. Depuis, l'hypoth??se nomm??e mod??le Hubbard est rapidement devenu un des candidats les plus prometteurs ?? en d??tenir la solution. Dans ce contexte, ce m??moire pr??sente des travaux de calculs num??riques sur les phases de la mati??re pr??dites par le mod??le de Hubbard. Le projet poursuit notamment deux objectifs. En premier lieu, on consid??re un couplage interplan dans le mod??le, ce qui le rend plus r??aliste que sa version 2D habituelle. Et en deuxi??me lieu, on laisse les phases antiferromagn??tique et supraconductrice coexister avec en plus une autre phase supraconductrice de type pi-triplet. Plus de d??tails sur le contexte et ces deux objectifs sont pr??sent??s au chapitre 1 et le mod??le de Hubbard est d??taill?? au chapitre 2. Pour obtenir des solutions num??riques au mod??le, les m??thodes utilis??es sont la th??orie de champ moyen dynamique sur amas (CDMFT) et l'approximation de l'amas variationnel (VCA). Ces m??thodes ainsi que le formalisme n??cessaire pour les aborder sont pr??sent??s au chapitre trois. Notons qu'on utilise ces m??thodes pour amas avec des m??thodes de diagonalisation exacte qui ne feront pas partie de la discussion. Enfin, le dernier chapitre pr??sente tous les r??sultats obtenus avec ce projet, qui m??nent ?? deux conclusions principales. Premi??rement, le couplage tridimensionnel tel qu'ajout?? n'a pas fait ressortir de tendance nette dans les r??sultats. Cela indique une de deux choses: soit les effets interplans sont n??gligeables dans le mod??le de Hubbard, soit il faudra les inclure d'une fa??on plus compl??te dans le futur. Deuxi??mement, on observe que la phase pi-triplet appara??t lorsqu'il y a coexistence entre l'antiferromagn??tisme et la supraconductivit?? dans le mod??le mais que ces deux derni??res phases se nuisent fortement l'une ?? l'autre, confirmant qu'il y a comp??tition de phases.
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Tran, Thanh Tung. « Mod elisation Hybride RANS/LES d' ecoulements massivement d ecoll es en r egime turbulent. Etude des corr elations pression/vitesse et confrontation a l'exp erimentation ». Phd thesis, 2012. http://tel.archives-ouvertes.fr/tel-00671130.

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Cette thèse, qui s'inscrit dans le contexte du projet ANR DIB, vise à la simulation par méthode hybride (DDES) de l'écoulement turbulent autour d'une plaque épaisse (Re = 80000), à une confrontation détaillée du mouvement instationnaire prédit avec une base de données expérimentale, et à l'étude des mécanismes à l'origine des fluctuations de pression à la paroi. L'écoulement présente successivement un fort décollement associé à l^acher tourbillonnaire en forte interaction avec la paroi, un recollement moyen puis un lent rétablissement vers une couche limite développée. L'attention est portée sur la région en aval du recollement. Les caractéristiques moyennes et instationnaires de l'écoulement sont étudiées au moyen d'outils statistiques classiques, ainsi que d'analyses de type moyenne conditionnelle, POD, LSE et Extended POD, dans leur version multi-temps. Un bon accord calcul/expérience est obtenu, et l'évolution des structures de grande échelle en aval du recollement est bien reproduite par la simulation. L'analyse est ensuite prolongée, notamment en ce qui concerne la tridimensionnalité de l'écoulement, ainsi que l'étude des différentes contributions à la pression pariétale fluctuante (termes source linéaire et non linéaire). Les analyses de type LSE basées sur la pression mettent en évidence des structures de type rouleaux portant une faible énergie, alors qu'on obtient des structures de type \hairpin" quand celles-ci sont basées sur la vitesse. Un résultat important de l'étude des termes contribuant à la pression est la dominance du terme non-linéaire, qui explique la faible énergie portée par les structures estimées à partir de la pression par des outils linéaires.
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Corr, Brian. « Immersive Experience : Evoking the Elements of Contemplative Space in Japanese Architecture ». Phd thesis, 2018. http://hdl.handle.net/1885/148884.

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This research project investigates the creation of immersive contemplative viewing experiences within my visual arts practice by identifying and adapting the fundamental elements of Japanese contemplative space into my aesthetic and conceptual lexicon. Contemplative experience is an intrinsic aspect of the human experience which has become increasingly scarce in this age of perpetual overstimulation and increasing secularisation. The primary goal of the research project is to provide a significant opportunity for new audiences to engage in meaningful contemplative experience informed by the centuries-old principles of yūgen 幽玄, ma 間, and hikari to kage 光と影 within Japanese architecture. The studio-based research first explores the creation of contemplative objects constructed with glass, followed by a series of maquettes of potential immersive contemplative environments. The research culminates with the immersive installation, Lux Mandala, which utilises the material characteristics of glass microspheres to synthesise the ephemeral optical phenomenon of the “glory” into a meditative encounter with light, shadow, space, transience and profundity. By aesthetically locating the viewer at the centre of this phenomenon, the viewer’s presence and perceptual mechanisms complete a participatory loop, allowing the phenomenon to enter into existence while enabling the viewer to reflect upon its nature, notions of perception and transience, and the significance of their own presence within this evanescent tableau. The outcomes of this research project represent a significant new nexus between visual arts practice, immersive experience, and the essence of Japanese contemplative space.
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Livres sur le sujet "CO2RR"

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Rogers, Garry F. Corr Syl the warrior. [Place of publication not identified] : [CreateSpace], 2013.

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Corr, Christopher. Christopher Corr : Recent paintings from India. London : Berkeley Square Gallery, 1989.

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Xavier, Francis. Corr espondance, 1535-1662 : Lettres et documents. Paris : Desclée de Brouwer, 1987.

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Komar, Melanie. Sadako and the thousand paper cranes by Eleanor Coerr : A multicultural novel study. Whitby, ON : S & S Learning Materials, 1997.

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Corr, Christopher. Christopher Corr : Recent paintings from travels in Australia, China, Guatemala, India, Mexico and the USSR. London : Berkeley Square Gallery, 1989.

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United States. Office of Juvenile Justice and Delinquency Prevention., dir. SCHEDULE OF TRAINING SERVICES... FOR JUVENILE CORR. & DETENTION PRACTITIONERS... U.S. DEPT. OF JUSTICE... NATIONAL INSTITUE OF CORRECTIONS.. [S.l : s.n., 1998.

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United Nations. General Assembly. Resolution adopted by the General Assembly, on the report of the Third Committee (A/44/736 and Corr.1)) 44/25 : Convention on the Rights of the Child. [New York] : United Nations, 1989.

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Fortescue, Sir John. Corr. King George Vl6. Taylor & Francis Group, 2012.

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Fisher, Margaret E., David T. Austern et Edward L. O'Brien. Prac Law Corr Pers. West Publishing Company, 1997.

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Speech Corr Thru Listening. Not Avail, 1996.

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Chapitres de livres sur le sujet "CO2RR"

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Corr, Philip. « Corr, Philip ». Dans Encyclopedia of Personality and Individual Differences, 914–15. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-24612-3_410.

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Corr, Philip. « Corr, Philip ». Dans Encyclopedia of Personality and Individual Differences, 1–2. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-28099-8_410-1.

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Azimova, Shakhnoza S., et Anna I. Glushenkova. « Feronia elephantum Corr. » Dans Lipids, Lipophilic Components and Essential Oils from Plant Sources, 836. London : Springer London, 2012. http://dx.doi.org/10.1007/978-0-85729-323-7_2703.

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Hossain, M., R. Islam et O. I. Joarder. « Micropropagation of Aegle marmelos Corr. (Bael) ». Dans Biotechnology in Agriculture and Forestry, 275–85. Berlin, Heidelberg : Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-07774-0_18.

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Pati, Rajesh, et M. Muthukumar. « Genetic Transformation of Bael (Aegle marmelos Corr.) ». Dans Biotechnology of Neglected and Underutilized Crops, 343–65. Dordrecht : Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-5500-0_14.

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Venkatachalam, Karthikeyan. « Bioactive Compounds of Longkong Fruit (Lansium domesticum Corr.) ». Dans Reference Series in Phytochemistry, 107–22. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-30182-8_11.

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Venkatachalam, Karthikeyan. « Bioactive Compounds of Longkong Fruit (Lansium domesticum Corr.) ». Dans Reference Series in Phytochemistry, 1–16. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-06120-3_11-1.

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Arumugam, S., et M. V. Rao. « Somatic Embryogenesis in Aegle Marmelos (L) Corr., A Medicinal Tree ». Dans Somatic Embryogenesis in Woody Plants, 605–55. Dordrecht : Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-017-3030-3_22.

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Arumugam, S., A. S. Rao et M. V. Rao. « In vitro propagation of Aegle marmelos (L.) Corr., a medicinal tree ». Dans Micropropagation of Woody Trees and Fruits, 269–315. Dordrecht : Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0125-0_10.

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de Paula, Wilson B. M., John F. Allen et Mark van der Giezen. « Mitochondria, Hydrogenosomes and Mitosomes in Relation to the CoRR Hypothesis for Genome Function and Evolution ». Dans Organelle Genetics, 105–19. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22380-8_5.

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Actes de conférences sur le sujet "CO2RR"

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Lorenzutti, Francesca, et Sophia Haussener. « Pore-level structural characterization of morphologically complex CO2RR electrodes ». Dans nanoGe Fall Meeting 2021. València : Fundació Scito, 2021. http://dx.doi.org/10.29363/nanoge.nfm.2021.141.

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Hod, Idan. « A MOF-Based Membrane that Provides Molecular-Level Control Over Heterogeneous CO2RR ». Dans International Conference on Frontiers in Electrocatalytic Transformations. València : Fundació Scito, 2021. http://dx.doi.org/10.29363/nanoge.interect.2021.001.

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Vavra, Jan. « Revealing dissolution and reprecipitation process of CO2RR catalyst during its activation by in-situ TEM ». Dans European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.311.

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Hoh, Baik, Seyhan Ucar, Pratham Oza, Chinmaya Patnayak et Kentaro Oguchi. « CORR : Collaborative On-Road Reputation ». Dans 2020 IEEE 3rd Connected and Automated Vehicles Symposium (CAVS). IEEE, 2020. http://dx.doi.org/10.1109/cavs51000.2020.9334679.

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Sharara, H. S., et M. A. Ismail. « αCORR : a novel algorithm for clustering gene expression data ». Dans 7th IEEE International Conference on Bioinformatics and Bioengineering. IEEE, 2007. http://dx.doi.org/10.1109/bibe.2007.4375676.

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Cai, Wanyong, Saiqiang Xia, Renliang Sun, Hao Chen, Xiaohan Zhang et Wenfeng Chen. « A Micro-Motion Feature Extraction Method Based on CORR-OMP ». Dans 2021 IEEE 4th International Conference on Electronics Technology (ICET). IEEE, 2021. http://dx.doi.org/10.1109/icet51757.2021.9451048.

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Dusia, Ayush, Ram Ramanathan et Adarshpal S. Sethi. « CORR : Centralized Opportunistic Reactive Routing for Mobile Multi-Hop Wireless Networks ». Dans 2019 28th International Conference on Computer Communication and Networks (ICCCN). IEEE, 2019. http://dx.doi.org/10.1109/icccn.2019.8847047.

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Vargas, João F., Bruno Lopez, Marco Panesi et Mario Lino Da Silva. « Refitting of detailed CO2IR databases to vibrationally specific databases tailored for aerothermodynamic flows ». Dans 2018 Joint Thermophysics and Heat Transfer Conference. Reston, Virginia : American Institute of Aeronautics and Astronautics, 2018. http://dx.doi.org/10.2514/6.2018-4177.

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Öztürk, Büşra, Zehra Büyüker, Ebru Taşkaya, Gökçen Bombar et António Heleno Cardoso. « Simetrik Akarsu Kavşağında Elde Edilmiş Hız Zaman Serisinin İstatistiksel Analizi ». Dans 6th International Students Science Congress. Izmir International Guest Student Association, 2022. http://dx.doi.org/10.52460/issc.2022.013.

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Bu deneysel çalışma, birbirine 90° açı ile bağlanan iki yan koldan oluşan bir simetrik akarsu kavşağında yapılmış noktasal hız ölçümleri sonucu elde edilen akım yönü, yanal yön ve düşey yöndeki hız bileşenlerine ait zaman serisi üzerinde istatistiksel analizin gerçekleştirilmesini amaçlamaktadır. Ana kanal üzerinde seçilmiş üç farklı noktada akustik yöntem ile çalışan Vectrino kullanılarak elde edilmiş anlık hız verileri, korelasyon (CORR) ve SNR (Signal to Noise Ratio) değerleri dikkate alınarak gürültüden arındırılmıştır. Ayıklanmış anlık hız değerlerinin ortalaması alınarak ortalama hız değerleri hesaplanmıştır. Anlık hız değerlerinden ortalama hız değerleri çıkarılarak çalkantılı hız bileşenleri ve ardından türbülans kinetik enerjisi, türbülans şiddeti, Reynolds gerilmeleri, korelasyon, çarpıklık ve basıklık katsayıları elde edilmiş uygun dağılımlar incelenmiş ve mevcut literatür ışığında yorumlanmıştır.
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Qiushi Chen, Qiushi Chen, Qiang Yang Qiang Yang et Weibo Deng Weibo Deng. « CS-CORR range super-resolution method for stepped frequency HF radar system ». Dans IET International Radar Conference 2015. Institution of Engineering and Technology, 2015. http://dx.doi.org/10.1049/cp.2015.1257.

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