574 research outputs found
Fan ti zi he jian ti zi du zhe zai yue du zhong de cha yi
No full textZhai, Mingjun.Thesis M.Phil. Chinese University of Hong Kong 2014.Includes bibliographical references (leaves 64-68).Abstracts also in Chinese.Title from PDF title page (viewed on 30, September, 2016).Zhai, Mingjun
Cai yong suan zi fen lie fa wei yi lan zi qi quan ding jia
No full textOr, Ming Chun = 採用算子分裂法為一籃子期權定價 / 柯銘駿.Thesis M.Phil. Chinese University of Hong Kong 2014.Includes bibliographical references (leaves 138-140).Abstracts also in Chinese.Title from PDF title page (viewed on 02, December, 2016).Or, Ming Chun = Cai yong suan zi fen lie fa wei yi lan zi qi quan ding jia / Ke Mingjun
The Tax Disadvantage Of Ordinary Income: An Event Study On The Legislative Process Of JGTRRA
No full textThe Jobs Growth and Tax ReliefReconciliation Act of 2003 (JGTRRA), signed into law by President George W.Bush, was a significant legislation in recent tax history. As the tax rates on capital gains anddividends are reduced to a historical low of 15%, U.S. stock prices haveincreased and the cost of equity capital declined after its passage. In contrast to the dividends and capital gainsthat receive preferential tax rates under JGTRRA, yields from U.S. Treasurybill remain tax-disadvantaged as ordinary income at a top marginal rate of 35%. Using an event study approach based ontwo years of Treasury yield observations, the author examines Treasury yield reactionsto major legislative events surrounding the passage of JGTRRA. The result suggests that a tax policyintentionally favoring dividends and capital gains over ordinary income may unintentionallypush up yields in the Treasury bill market, thereby affecting the cost ofgovernment borrowing
Bimetallic porphyrin PET radiotracers for Low-Dose MRI contrast enhancement
No full textIn medical imaging, concerns over the risks associated with imaging agents have been consistently raised by doctors and patients, and ongoing efforts are being made to cautiously explore safer and more efficient compounds. There is continued interest in combining the well-known imaging modalities of positron emission tomography (PET) and magnetic resonance imaging (MRI). However, there has not been reported a singlemolecule probe offering dual-modal imaging without performance degradation. We herein present a potential solution wherein the compound, PGaLGd, incorporates radioactive Ga(III) for PET imaging whilst simultaneously being able to exhibit MRI contrast through a coordinated Gd(III) ion but at low concentrations/doses. Besides
elucidating MRI enhancing mechanisms through computational chemistry techniques, our compound has proven to be a successful dual-imaging agent for both PET and MRI in mice. Additionally, we conducted comprehensive in vitro and in vivo studies, assessing biosafety and photodynamic therapeutic potential across various cell lines and organoids. We have placed importance on interlinking structures, coordinated metals, adjacent ligands, and frontier molecular orbitals in our probe design to enhance water relaxation ability and move towards the design of next-generation low-dose imaging agents
Algorithms and applications of preference based ranking for information retrieval
No full textIn this thesis, the author designed three sets of preference based ranking algorithms for information retrieval and provided the corresponsive applications for the algorithms. The main goal is to retrieve recommended, high similar and valuable ranking results to users
National systems of technology transfer of BRICS countries: features of formation
No full textThe article considers the features of creation and development of organizational systems of technology transfer in the BRICS member countries (Brazil, Russian Federation, India, China, South Africa), interaction of participants in the innovation process. The author identifies the significant role of the regional component in the formation of effective national innovation systems. The purpose of the article is to analyze the national innovation systems of the BRICS member countries, since each of these countries has gone its own way of innovative development, justified by regional characteristics. Based on the analysis of transfer systems operating in the BRICS countries, the author identifies key and most promising areas for the development of the integration of the scientific and educational, production spheres and the state in order to form special mechanisms for organizing innovative processes that ensure effective interaction between all its participants, contributing to the formation of competitive high-tech products
Pore-scale numerical simulation of spontaneous imbibition in porous media containing fractures
No full textSpontaneous imbibition is an essential mechanism for recovering oil from low-permeability fractured water-driven reservoirs. To accurately capture the migration interface of oil-water two-phase flow under these conditions, this study employs phase field theory coupled with Cahn-Hilliard and Navier-Stokes equations. We conduct a numerical pore-scale investigation on countercurrent imbibition in low-permeability fractured porous media. The results show that pore-scale spontaneous imbibition can be divided into four stages. In the first stage, oil-water film is formed when oil contacts with water, and this contact line moves under the action of capillary force. In the second stage, the oil film at the end of the oil cluster ruptures to form isolated oil droplets. In the third stage, these oil droplets are surrounded by water and gradually transported outward. In the final stage, oil droplets accumulate in the fractures and are collectively expelled from the matrix. In the process of oil droplet migration, the phenomenon of sticking occurs under the influence of water extrusion and the internal structure of the matrix, which leads to the formation of residual oil. The increased complexity of open boundary and fracture development strengthens the imbibition effect by elevating the degree of spontaneous imbibition pore utilization, thus improving the oil utilization efficiency. The above findings can provide a numerical modeling reference for the study of spontaneous imbibition in fractured porous media, and at the same time, has some guiding significance for the development of low-permeability reservoirs.Document Type: Original articleCited as: Yang, L., Jiang, X., Li, M., Gong, F., Dong, G., Li, X. Pore-scale numerical simulation of spontaneous imbibition in porous media containing fractures. Capillarity, 2024, 10(2): 48-56. https://doi.org/10.46690/capi.2024.02.0
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