3,962,921 research outputs found
Liu shi yu dan si ji
No full text劉鳳著.綫裝, 1函.框20.1x13.6公分, 9行18字. 白口, 左右雙邊, 單黑魚尾. 版心上鐫"澹思集", 中鐫卷次, 下鐫葉次及"劉漙卿刻"書名及版式據卷三.書根題"劉侍御澹思集", 每冊書根題後分別錄"樂", "御", "書", "數"見《香港中文大學圖書館古籍善本書錄》(2001, p. 244)鈐有"天一閣", "沈氏鳴野山房圖籍印"Library's copy: 館存卷三至五, 卷九至十六, 共四冊 ; 缺卷一至二[v.1], 卷六至八[v.3]Xian zhuang, 1 han.Kuang 20.1 x 13.6 gong fen, 9 hang 18 zi. Bai kou, zuo you shuang bian, dan hei yu wei. Ban xin shang juan "Dan si ji", zhong juan juan ci, xia juan ye ci ji "Liu Tuanqing ke"Shu ming ji ban shi ju juan san.Shu gen ti "Liu shi yu dan si ji", mei ce shu gen ti hou fen bie lu "Yue", "Yu", "Shu", "Shu"Jian "Xianggang Zhong wen da xue tu shu guan gu ji shan ben shu lu" (2001, p. 244)Liu Feng zhu.Qian you "Tian yi ge", "Shen shi Ming ye shan fang tu ji yin"Library's copy: guan cun juan san zhi wu, juan jiu zhi shi liu, gong si ce ; que juan yi zhi er [v.1], juan liu zhi ba [v.3
Sen-Sen
No full textTrade card/ink blotter advertising Sen-Sen, a breath freshener manufactured by the Sen-Sen Chiclet Co., New York, N.Y
Liu Kang
No full textLiu Kang: Essays on Art and Culture is a testament to the inexorable passion of an artist who knew no boundaries. This collection of essays, which Liu Kang wrote over 44 years, offers an insight into the artist’s myriad interests as well as his contributions as a first generation Nanyang artist and art educator. Translated into English for this volume, Liu Kang’s essays are accompanied by commentaries and photographs of the artist-author and his subjects
Perfil académico del Profesor Sen
No full textEl profesor Sen, tiene una amplia Trayectoria academica; con unos reconocimientos y disticiones profesionales, empleos, nombramientos, libros. nacido en 1993. India<br />
Sen-Lab-LMS/Senescence_nuclear_features: Publication_version_2.0
No full text<p>Author checklist.</p>
New Liu Estimators for the Poisson Regression Model: Method and Application
No full textA new shrinkage estimator for the Poisson model is introduced in this paper. This method is a generalization of the Liu (1993) estimator originally developed for the linear regression model and will be generalised here to be used instead of the classical maximum likelihood (ML) method in the presence of multicollinearity since the mean squared error (MSE) of ML becomes inflated in that situation. Furthermore, this paper derives the optimal value of the shrinkage parameter and based on this value some methods of how the shrinkage parameter should be estimated are suggested. Using Monte Carlo simulation where the MSE and mean absolute error (MAE) are calculated it is shown that when the Liu estimator is applied with these proposed estimators of the shrinkage parameter it always outperforms the ML. Finally, an empirical application has been considered to illustrate the usefulness of the new Liu estimators.Estimation; MSE; MAE; Multicollinearity; Poisson; Liu; Simulation
Amartya Sen, premio nobel de economía 1998
No full text<p>Entrevista</p><p>El economista Amartya Sen, de 64 años, fue galardonado el pasado miércoles con el Premio Nobel de Economía por sus trabajos sobre el hambre en el mundo y su relación entre la democracia y la satisfacción de las necesidades básicas de los seres humanos. Casado en terceras nupcias, Sen ha sido profesor en universidades de Asia, América del Norte y Europa. Actualmente enseña en el Trinity College, de la Universidad de Cambridge, en el Reino Unido.</p>
Scalar wave equation modeling with timespace domain dispersion-relation-based staggered-grid finite-difference schemes
No full textAbstract The staggered-grid finite-difference (SFD) method is widely used in numerical modeling of wave equations. Conventional SFD stencils for spatial deriva-tives are usually designed in the space domain. However, when they are used to solve wave equations, it becomes difficult to satisfy the dispersion relations exactly. Liu and Sen (2009c) proposed anewSFDscheme for one-dimensional (1D) scalarwaveequation based on the time–space domain dispersion relation and plane wave theory, which is made to satisfy the exact dispersion relation. This new SFD scheme has greater accuracy and better stability than a conventional scheme under the same discretizations. In this paper, we develop this new SFD scheme further for numerical solution of 2D and 3D scalarwave equations.Wedemonstrate that themodeling accuracy is secondorderwhen the conventional 2M-th-order space-domain SFD and the second order time-domain finite-difference stencils are directly used to solve the scalar wave equation. However, under the same discretization, our 1D scheme can reach 2M-th-order accuracy and is always stable; 2D and 3D schemes can reach 2M-th-order accuracy along 8 and 48 di-rections, respectively, and have better stability. The advantages of the new schemes are also demonstrated with dispersion analysis, stability analysis, and numerical modeling
Permeability of bituminous coal to CH4 and CO2 under fixed volume and stress boundary conditions: Effects of sorption
No full textWe report permeability data of a cylindrical sample of high volatile bituminous coal (25mm in diameter) with a clearly visible cleat system, to CH4 and CO2, performed under (near) fixed volume versus fixed stress conditions. To isolate the effect of sorption on permeability evolution, helium (non-sorbing gas) was used as a control fluid. All flow-through tests reported here were conducted under conditions of single-phase flow at 40℃, employing Terzaghi effective stresses of 14-35MPa. This experimental study aimed to gain a better understanding of the effects of fully coupled stress-strain-sorption-diffusion behaviour on permeability evolution in coal reservoirs during CO2-Enhanced Coalbed Methane (ECBM) recovery. Our results obtained permeability evolution versus changes in effective stress under both fixed volume and fixed stress conditions, showing an exponential correlation. Importantly, permeability (κ) obtained at similar effective stresses showed κ_helium > κ_(CH_4 ) >> κ_(CO_2 ), and κ measured at fixed volume is higher than fixed stress. This all demonstrates that permeability to CH4 and CO2, under in-situ boundary conditions, is strongly influenced by the coupled effects of a) self-stress generated by swelling, b) the change in effective stress coefficient upon sorption, c) sorption-induced closure of transport paths independently of poro-elastic effect, and d) heterogeneous gas penetration and equilibration, dependent on diffusion. Our results also show that the Walsh permeability model offers a promising basis for relating permeability evolution to in-situ stress evolution, using appropriate parameter values corrected for the effects of stress-strain-sorption-diffusion. These data are supplementary to:
Liu, J., Spiers, C.J., 2022. Permeability of bituminous coal to CH4 and CO2 under fixed volume and stress boundary conditions: Effects of sorption. Submitted to Frontiers in Earth Sciences
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