Thematische Bibliographien / Liu index

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  2. Dissertationen
  3. Bücher
  4. Buchteile
  5. Konferenzberichte
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Auswahl der wissenschaftlichen Literatur zum Thema „Liu index“

Autor: Grafiati
Veröffentlicht am 25. Juni 2021
Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Liu index"

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Kumar, Deepak, Janak Raj Sharma und Lorentz Jăntschi. „A Novel Family of Efficient Weighted-Newton Multiple Root Iterations“. Symmetry 12, Nr. 9 (10.09.2020): 1494. http://dx.doi.org/10.3390/sym12091494.

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We propose a novel family of seventh-order iterative methods for computing multiple zeros of a nonlinear function. The algorithm consists of three steps, of which the first two are the steps of recently developed Liu–Zhou fourth-order method, whereas the third step is based on a Newton-like step. The efficiency index of the proposed scheme is 1.627, which is better than the efficiency index 1.587 of the basic Liu–Zhou fourth-order method. In this sense, the proposed iteration is the modification over the Liu–Zhou iteration. Theoretical results are fully studied including the main theorem of local convergence analysis. Moreover, convergence domains are also assessed using the graphical tool, namely, basins of attraction which are symmetrical through the fractal like boundaries. Accuracy and computational efficiency are demonstrated by implementing the algorithms on different numerical problems. Comparison of numerical experiments shows that the new methods have an edge over the existing methods.
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Chen, Yin, Baoyindureng Wu und Xinhui An. „Wiener Index of Graphs with Radius Two“. ISRN Combinatorics 2013 (03.03.2013): 1–5. http://dx.doi.org/10.1155/2013/906756.

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The Wiener index of a graph is the sum of the distances between all pairs of vertices. It has been one of main descriptors that correlate a chemical compound's molecular graph with experimentally gathered data regarding the compound's characteristics. We characterize graphs with the maximum Wiener index among all graphs of order . with radius two. In addition, we pose a conjecture concerning the minimum Wiener index of graphs with given radius. If this conjecture is true, it will be able to answer an open question by You and Liu (2011).
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Hausken, John, Kjersti Lønning, Linda Johnsen, Pål-Dag Line, Kristian Heldal und Karsten Midtvedt. „FP745 LIU COMORBIDITY INDEX PREDICTS ICU ADMISSION AND SURVIVAL POST KIDNEY TRANSPLANTATION“. Nephrology Dialysis Transplantation 33, suppl_1 (01.05.2018): i297. http://dx.doi.org/10.1093/ndt/gfy104.fp745.

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Mu, Yi, Andrew I. Chin, Abhijit V. Kshirsagar, Yi Zhang und Heejung Bang. „Regional and Temporal Variations in Comorbidity Among US Dialysis Patients: A Longitudinal Study of Medicare Claims Data“. INQUIRY: The Journal of Health Care Organization, Provision, and Financing 55 (01.01.2018): 004695801877116. http://dx.doi.org/10.1177/0046958018771163.

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Medicare claims data are commonly used to query comorbidities for case-mix adjustment in research of patients with end-stage renal disease (ESRD) in the United States. These adjustments may affect reimbursement and quality rating through comparative profiling and ranking of dialysis facilities. We studied regional and temporal variations in comorbidity from claims data in the United States Renal Data System. Patients with a previous 1-year Medicare history who initiated dialysis therapy between 2006 and 2009 were examined with a follow-up period until 2012. By linking pre- and post-ESRD Medicare claims with the Dartmouth Atlas, we carried out a longitudinal data analysis with multivariable adjustment to investigate regional and temporal variations in the Liu comorbidity index. We identified 23 336 incident hemodialysis patients who were covered by Medicare the year prior to dialysis initiation and had survived with complete 3 years of follow-up data. With the United States divided into 4 geographic regions, the Western region was found to have the lowest Liu index over all 3 follow-up years, compared with the respective years in the other regions (Midwest, Northeast, and South). In comparison with the first year, the Liu index dropped significantly during the second and third years of follow-up across all 4 regions. Significant regional and temporal variations observed in the comorbidity index cannot be explained by differences in reimbursement (average per state) or predialysis comorbidity. Based on our exploratory study, future studies should focus on identifying the factors and reasons for these variations which have the potential to affect health care policy and research.
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Yu, Guihai, Lihua Feng und Aleksandar Ilic. „The largest n - 1 Hosoya indices of unicyclic graphs“. Filomat 30, Nr. 9 (2016): 2573–81. http://dx.doi.org/10.2298/fil1609573y.

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The Hosoya index Z(G) of a graph G is defined as the total number of edge independent sets of G. In this paper, we extend the research of [J. Ou, On extremal unicyclic molecular graphs with maximal Hosoya index, Discrete Appl. Math. 157 (2009) 391-397.] and [Y. Ye, X. Pan, H. Liu, Ordering unicyclic graphs with respect to Hosoya indices and Merrifield-Simmons indices, MATCH Commun. Math. Comput. Chem. 59 (2008) 191-202.] and order the largest n - 1 unicyclic graphs with respect to the Hosoya index.
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Tuğcu, Murat, Umut Kasapoğlu, Gülizar Şahin und Süheyla Apaydın. „The Factors Affecting Survival in Geriatric Hemodialysis Patients“. International Journal of Nephrology 2018 (10.07.2018): 1–4. http://dx.doi.org/10.1155/2018/5769762.

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Introduction. The number of geriatric patients is increasing in hemodialysis population over the years and mortality is higher in this group of patients. This study evaluated the factors affecting geriatric hemodialysis patient survival. Materials and Methods. This retrospective cohort study enrolled patients discharged from our nephrology clinic from 2009 to 2014. Data collected included demographics, Eastern Cooperative Oncology Group-Performance Status, vascular access type, and metabolic parameters. Comorbidity was quantified using the modified Liu comorbidity index. The outcome measure was mortality. Results. The study enrolled 99 elderly dialysis patients (42.4% women (n = 42); mean age 75 ± 7 years). The mean follow-up duration was 19.7 ± 11 months. The mortality rate over the four years was 47.5% (n = 46). The modified Liu comorbidity index score, patient age, and Eastern Cooperative Oncology Group-Performance Status were significantly related to mortality in univariate and multivariate analyses. Conclusion. The present study revealed that comorbidities and low performance status at the onset of dialysis had shortened the survival time in the geriatric hemodialysis patient group.
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Brown, I. David. „A redetermination of the structure of poly[[μ4-(R)-2-ammonio-3-sulfonatopropanoato]aquasodium], originally reported as poly[[μ7-L-cysteato(2−)]disodium]“. Acta Crystallographica Section E Structure Reports Online 68, Nr. 4 (10.03.2012): m393. http://dx.doi.org/10.1107/s1600536812009683.

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The structure originally reported as poly[[μ7-L-cysteato(2−)]disodium], [Na2(C3H5NO5S)]n[Liu (2002).Acta Cryst. E67, m1346–m1347], has been redetermined with one of the sodium atoms replaced with a water molecule and an additional proton attached to the amine group, resulting in the revised formula [Na{CO2CH(CH2SO3)NH3}(H2O)]n. The agreement index,wR, has been reduced from 0.159 to 0.087 and the global instability index from 0.56 vu (valence units) to the acceptable value of 0.11 vu.
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Liu, Chin, und Yi Shi-Gong. „Chin Liu strain rate sensitivity index–strain equation of superplasticity and influence of specimen geometry“. Materials Science and Technology 6, Nr. 2 (Februar 1990): 141–45. http://dx.doi.org/10.1179/mst.1990.6.2.141.

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9

Qu, Huimin, und Jie Han. „Driving Factors for the Change of Fertilizer Use Intensity in China and Its Six Major Regions“. International Business Research 14, Nr. 10 (08.09.2021): 71. http://dx.doi.org/10.5539/ibr.v14n10p71.

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China has invested excessive amounts of fertilizer on limited farmland, which poses a threat to human health and agro-ecological environment. While a plethora of studies have explored how to reduce the total amount of chemical fertilizer, and scant attention has been paid to how to reduce the chemical fertilizer use intensity (FUI). This paper aims to explore the driving factors for the change of FUI to answer this question. It uses the official statistics of China from 1997 to 2017, as well as index decomposition analysis (IDA) and Laspeyres index decomposition method to obtain the following results. The change of fertilizer use intensity can be affected by three factors: input-output ratio of fertilizer (IOR), unit labor output (ULO) and labor input per unit sown area (LIU). At the national level, IOR is the most important factor in reducing the use of chemical fertilizers, while ULO is the most important factor in increasing. The factor of LIU can not only reduce the intensity of fertilizer use, but also increase the intensity.  On a regional level, the fertilizer use intensity in Central-South China is the strongest, while that in the Southwest China is the smallest. Compared with other regions, the factors of ULO in Northwest China and IOR in East China have the greatest impact on fertilizer use intensity. In addition, LIU mainly reduces the intensity of fertilizer use in Northeast China, while this factor in North China is to increase the intensity. Our findings suggest that farmers should not increase labor productivity by investing chemical fertilizer. Improving the efficiency of fertilizer use and transferring rural labor force can reduce the fertilizer use intensity in China.
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Li, Xu, Maqsood Ahmad, Muhammad Javaid, Muhammad Saeed und Jia-Bao Liu. „Bounds on General Randić Index for F-Sum Graphs“. Journal of Mathematics 2020 (30.08.2020): 1–17. http://dx.doi.org/10.1155/2020/9129365.

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A topological invariant is a numerical parameter associated with molecular graph and plays an imperative role in the study and analysis of quantitative structure activity/property relationships (QSAR/QSPR). The correlation between the entire π-electron energy and the structure of a molecular graph was explored and understood by the first Zagreb index. Recently, Liu et al. (2019) calculated the first general Zagreb index of the F-sum graphs. In the same paper, they also proposed the open problem to compute the general Randić index RαΓ=∑uv∈EΓdΓu×dΓvα of the F-sum graphs, where α∈R and dΓu denote the valency of the vertex u in the molecular graph Γ. Aim of this paper is to compute the lower and upper bounds of the general Randić index for the F-sum graphs when α∈N. We present numerous examples to support and check the reliability as well as validity of our bounds. Furthermore, the results acquired are the generalization of the results offered by Deng et al. (2016), who studied the general Randić index for exactly α=1.
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Dissertationen zum Thema "Liu index"

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Rodríguez, Alzza Efraín. „Entrevista a Rocío Liu Arévalo : modificaciones a la Ley del Impuesto a la Renta 2012“. IUS ET VERITAS, 2015. http://repositorio.pucp.edu.pe/index/handle/123456789/123680.

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Charraud, Jocelyn, und Saez Adrian Garcia. „Bankruptcy prediction models on Swedish companies“. Thesis, Umeå universitet, Företagsekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-185143.

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Bankruptcies have been a sensitive topic all around the world for over 50 years. From their research, the authors have found that only a few bankruptcy studies have been conducted in Sweden and even less on the topic of bankruptcy prediction models. This thesis investigates the performance of the Altman, Ohlson and Zmijewski bankruptcy prediction models. This research investigates all Swedish companies during the years 2017 and 2018.  This study has the intention to shed light on some of the most famous bankruptcy prediction models. It is interesting to explore the predictive abilities and usability of those three models in Sweden. The second purpose of this study is to create two models from the most significant variable out of the three models studied and to test its prediction power with the aim to create two models designed for Swedish companies.  We identified a research gap in terms of Sweden, where bankruptcy prediction models have been rather unexplored and especially with those three models. Furthermore, we have identified a second research gap regarding the time period of the research. Only a few studies have been conducted on the topic of bankruptcy prediction models post the financial crisis of 2007/08.  We have conducted a quantitative study in order to achieve the purpose of the study. The data used was secondary data gathered from the Serrano database. This research followed an abductive approach with a positive paradigm. This research has studied all active Swedish companies between the years 2017 and 2018. Finally, this contributed to the current field of knowledge on the topic through the analysis of the results of the models on Swedish companies, using the liquidity theory, solvency and insolvency theory, the pecking order theory, the profitability theory, the cash flow theory, and the contagion effect. The results aligned with the liquidity theory, the solvency and insolvency theory and the profitability theory. Moreover, from this research we have found that the Altman model has the lowest performance out of the three models, followed by the Ohlson model that shows some mixed results depending on the statistical analysis. Lastly, the Zmijewski model has the best performance out of the three models. Regarding the performance and the prediction power of the two new models were significantly higher than the three models studied.
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Cortiñas, Guillermo. „Cuantización y teorema de Poincaré-Birkhoff-Witt“. Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/95761.

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Jinaprabha, Sūri Chojnacki Christine. „Vividhatīrthakalpaḥ : regards sur le lieu saint jaïna /“. Pondichéry (Inde) : [Paris] : Institut français de Pondichéry ; École française d'Extrême-Orient, 1995. http://catalogue.bnf.fr/ark:/12148/cb358263542.

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Figueroa, Serrudo Christian Bernardo. „Superficies en el grupo de Heisenberg“. Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/97335.

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Ayala, V., und Hacibekiroglu A. Kara. „Examples of linear control systems on Lie groups“. Pontificia Universidad Católica del Perú, 2013. http://repositorio.pucp.edu.pe/index/handle/123456789/95402.

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Gül, Erdal. „Controllability of linear systems on non-abelian compact lie groups“. Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/96429.

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In this paper, we shall deal with a linear control system ∑ defined on a Lie group G with Lie algebra L(G). We prove that, if G is a compact connected Lie group, then the vector fields associated to dynamic of ∑ are conservative, and that if G is also non-Abelian then, by using Poincare Theorem, ∑ is transitive if and only if it is controllable.
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Pham, Khoa. „Trace Formulas, Invariant Bilinear Forms and Dynkin Indices of Lie Algebra Representations Over Rings“. Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31502.

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The trace form gives a connection between the representation ring and the space of invariant bilinear forms of a Lie algebra $L$. This thesis reviews the definition of the trace of an endomorphism of a finitely generated projective module over a commutative ring $R$. We then use this to look at the trace form of a finitely generated projective representation of a Lie algebra $L$ over $R$ and its representation ring. While doing so, we prove a few trace formulas which are useful in the theory of the Dynkin index, an invariant introduced by Dynkin in 1952 to study homomorphisms between simple Lie algebras.
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Nhangumbe, Clarinda Vitorino. „Lie Analysis for Partial Differential Equations in Finance“. Master's thesis, Faculty of Science, 2019. https://hdl.handle.net/11427/31817.

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Weather derivatives are financial tools used to manage the risks related to changes in the weather and are priced considering weather variables such as rainfall, temperature, humidity and wind as the underlying asset. Some recent researches suggest to model the amount of rainfall by considering the mean reverting processes. As an example, the Ornstein Uhlenbeck process was proposed by Allen [3] to model yearly rainfall and by Unami et al. [52] to model the irregularity of rainfall intensity as well as duration of dry spells. By using the Feynman-Kac theorem and the rainfall indexes we derive the partial differential equations (PDEs) that governs the price of an European option. We apply the Lie analysis theory to solve the PDEs, we provide the group classification and use it to find the invariant analytical solutions, particularly the ones compatible with the terminal conditions.
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Kuney, Clark G. „Sample quantity production of ultra-high refractive index distributions of glass microspheres“. Online version, 2003. http://www.uwstout.edu/lib/thesis/2003/2003kuneyc.pdf.

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Bücher zum Thema "Liu index"

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Han Wei Liu chao bei ke jiao zhu: Zong mu ti yao. Beijing shi: Xian zhuang shu ju, 2008.

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Yang, Shoubiao. Zhongguo ge zhong yao cheng shi ling shou wu jia zhi shu zhuan kan: Minguo er shi liu nian qi yue zhi san shi nian liu yue = Index number of retail prices in leading cities of China : july 1937 - june 1941. [Beijing: Beijing zhong xian tuo fang ke ji fa zhan you xian gong si, 2012.

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Saqqāf, ʻAlawī. Fahāris Mukhtaṣar al-ʻulūw lil-Dhahabi, Makhyakhat Ibn Ṭuhmān li-Ibrāhīm ibn Ṭuhmān, al-Tamhīd li-Ibn ʻAbd al-Barr. al-Dammām, al-Mamlakah al-ʻArabīyah al-Saʻūdīyah: Dār al-Hijrah lil-Nashr wa-al-Tawzīʻ, 1989.

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Cheng shi xing fu gan: Lai zi liu ge sheng hui cheng shi de xing fu zhi shu bao gao = Subjective well-being of Chinese citizens : report on well-being index from six provincial capitals. Beijing: She hui ke xue wen xian chu ban she, 2008.

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Collamore, Lila. The Bamberg antiphoner: Staatsbibliothek, lit 25 : printouts from an index in machine-readable form. Washington, DC: Projects CANTUS, Benjamin T. Rome School of Music, Catholic University of America, 1990.

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Zui xin Lin Yutang Han Ying ci dian zeng bian pin yin suo yin: Supplementary pinyin index to the new Lin Yutang Chinese- Englishi dictionary. Xianggang: Da sheng chu ban you xian gong si, 1987.

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Zui xin Lin Yutang Han Ying ci dian zeng bian pin yin suo yin: Supplementary pinyin index to the new Lin Yutang Chinese- Englishi dictionary. Xianggang: Da sheng chu ban you xian gong si, 1987.

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Maalouf, Amin. C ʹivisi c ʹ♯łkm♯łs ʹ du nya: Uygarl♯łg ♯łm♯łz tu kendig inde. I stanbul: Yap♯ł Kredi Yay♯łnlar♯ł, 2009.

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Doran, Robert S., Richard V. Kadison und Efton Park. Operator algebras and their applications: A tribute to Richard V. Kadison : AMS Special Session, Janaury 10-11, 2015, San Antonio, Texas. Providence, Rhode Island: American Mathematical Society, 2016.

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Steven, Rosenberg, und Clara L. Aldana. Analysis, geometry, and quantum field theory: International conference in honor of Steve Rosenberg's 60th birthday, September 26-30, 2011, Potsdam University, Potsdam, Germany. Providence, Rhode Island: American Mathematical Society, 2012.

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Buchteile zum Thema "Liu index"

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Debord, Claire, und Georges Skandalis. „Lie groupoids, pseudodifferential calculus, and index theory“. In Advances in Noncommutative Geometry, 245–89. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-29597-4_4.

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Deveaud, Romain, Florian Boudin und Patrice Bellot. „LIA at INEX 2010 Book Track“. In Lecture Notes in Computer Science, 118–27. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23577-1_10.

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Paradan, Paul-`Emile, und Mich`ele Vergne. „Equivariant Index of Twisted Dirac Operators and Semi-classical Limits“. In Lie Groups, Geometry, and Representation Theory, 419–58. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02191-7_15.

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Dubson, Alberto S. „Local Multiplicity of the Intersection of Lagrangian Cycles and the Index of Holonomic Modules“. In New Developments in Lie Theory and Their Applications, 207–25. Boston, MA: Birkhäuser Boston, 1992. http://dx.doi.org/10.1007/978-1-4612-2978-0_14.

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„Index“. In Liu Kang, 250–56. National Gallery Singapore, 2011. http://dx.doi.org/10.2307/j.ctvk3gncv.48.

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„INDEX“. In Liu Kang, 295. National Gallery Singapore, 2011. http://dx.doi.org/10.2307/j.ctv1hm8j5m.14.

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„Index“. In Hidden and Visible Realms, 211–39. Columbia University Press, 2018. http://dx.doi.org/10.7312/liu-18716-017.

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„Index“. In To the End of Revolution, 385–401. Columbia University Press, 2019. http://dx.doi.org/10.7312/liu-19526-013.

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„Index“. In The Sage Learning of Liu Zhi, 645–78. BRILL, 2009. http://dx.doi.org/10.1163/9781684170494_019.

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„Index“. In Liu, Volpe, and Galetta's Neuro-Ophthalmology, 685–707. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-323-34044-1.00028-6.

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Konferenzberichte zum Thema "Liu index"

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Huang, Jing, Xiangyun Wu, Zhiyong Zhang und Han Yan. „Notice of Retraction: Evaluation of Water Quality Pollution and Identification Index for the Liu River, Zhangwu County, China“. In 2011 5th International Conference on Bioinformatics and Biomedical Engineering. IEEE, 2011. http://dx.doi.org/10.1109/icbbe.2011.5780816.

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Ibañez, Manuel, William A. Beckman und Sanford A. Klein. „Frequency Distributions for Hourly and Daily Clearness Indices“. In ASME 2001 Solar Engineering: International Solar Energy Conference (FORUM 2001: Solar Energy — The Power to Choose). American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/sed2001-130.

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Abstract The clearness index for hourly and daily radiation is an important parameter in describing solar radiation. Liu and Jordan demonstrated that the monthly average daily clearness index could be used to predict the long-term distribution of daily solar radiation in a month. This paper reviews recent literature on the prediction of hourly and daily frequency distributions and cumulative frequency distributions of clearness indices. Ten years of measured weather data for six cities in the US are used to investigate the nature of the hourly and daily frequency distributions. A second set of ten years of data for six cities is used to verify the predictions. A bi-exponential probability density function is proposed that fits the observed bimodal nature of the data better than existing models. A case is made for the function being universal.
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Liu, Xiaofeng, und Joseph Katz. „A Comparison of Cavitation Inception Index Measurements to the Spatial Pressure Distribution Within a 2D Cavity Shear Flow“. In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37090.

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Direct cavitation inception index measurements and observation on occurrence of cavitation are compared to results of novel spatial pressure distribution measurements in a 2D cavity shear flow. This non-intrusive technique utilizes four-exposure PIV to measure the distribution of material acceleration, and integrating it by means of omni-directional virtual boundary integration algorithm to obtain the pressure distribution (Liu and Katz, 2006). Consequently, it provides the instantaneous spatial distributions of velocity, material acceleration and pressure over a sample area along with their statistics. The present Reynolds numbers based on the cavity length vary from 1.7×105 to 3.4×105. High-speed imaging of cavitation inception, recorded at 30,000 fps, indicates that for this 2D cavity flow, the onset of cavitation always occurs on the top of the cavity trailing edge, regardless of the free stream speed. With decreasing pressure cavitation intermittently expand to the region located just in front of the cavity. The time-averaged spatial pressure distribution has a minimum just above the trailing edge due to the interaction of the impinging shear layer with the trailing wall. Around the cavity trailing edge, the mean flow first decelerates due to the impingement, but then accelerates right above the trailing edge, creating a local pressure minimum there. RMS values and PDFs of pressure fluctuations show that the highest fluctuations occur around the cavity trailing edge, and that the pressure peaks are consistent with the measured cavitation inception indices. There is also agreement between pressure statistics and conditions of appearance of cavitation in front of the trailing edge. The paper also provides the first directly measured experimental data on pressure-velocity correlation and pressure diffusion terms that appear in the evolution equation for turbulent kinetic energy. Results compared to other terms that act as sources and sinks in the turbulent kinetic energy balance. It is evident that near the trailing edge of the cavity, the contribution of pressure diffusion is comparable to that of turbulent kinetic energy production rate, and is much larger than the turbulent diffusion rate. Trends and spatial distribution of pressure diffusion also differs from those of turbulence diffusion.
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Chen, Yuecong, und Zongqi Liu. „The H-index and First-author H-index of Chinese Scholars in LIS“. In 2016 6th International Conference on Mechatronics, Computer and Education Informationization (MCEI 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/mcei-16.2016.233.

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Müller, Andreas, und Zdravko Terze. „A Constraint Stabilization Method for Time Integration of Constrained Multibody Systems in Lie Group Setting“. In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34899.

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The stabilization of geometric constraints is vital for an accurate numerical solution of the differential-algebraic equations (DAE) governing the dynamics of constrained multibody systems (MBS). Although this has been a central topic in numerical MBS dynamics using classical vector space formulations, it has not yet been sufficiently addressed when using Lie group formulations. A straightforward approach is to impose constraints directly on the Lie group elements that represent the MBS motion, which requires additional constraints accounting for the invariants of the Lie group. On the other hand, most numerical Lie group integration schemes introduce local coordinates within the integration step, and it is natural to perform the stabilization in terms of these local coordinates. Such a formulation is presented in this paper for index 1 formulation. The stabilization method is applicable to general coordinate mappings (canonical coordinates, Cayley-Rodriguez, Study) on the MBS configuration space Lie group. The stabilization scheme resembles the well-known vectors space projection and pseudo-inverse method consisting in an iterative procedure. A numerical example is presented and it is shown that the Lie group stabilization scheme converges normally within one iteration step, like the scheme in the vector space formulation.
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Bartlett, F. Michael. „Reliability of Structures that Pass Imperfect Proof Load Tests“. In IABSE Congress, New York, New York 2019: The Evolving Metropolis. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.0570.

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<p>Proof load tests have the potential to confirm the structural safety of a component suspected of being substandard. Methodologies are available to revise the reliability index of the suspect component, after it passes a proof load test, that essentially assume that the probability that the actual resistance is less than the proof load is zero. There is some sense among practitioners, however, that “you can always pass a proof load test” and so the current methodologies for updating the reliability index may be unconservative.</p> <p>This paper presents the development of rational criteria for including proof load testing into the safety assessment that account for imperfect repeatability of the test result. The necessary mathematical formulation requires the following steps:</p> <ol> <li>Define the likelihood that a particular proof load test can be successfully repeated, i.e., (100-&alpha;)%;</li> <li>Partially truncate the lower tail of the resistance distribution such that the cumulative probability corresponding to the load test magnitude equals the probability that the load test will not be successfully repeated, i.e., &alpha;%; and,</li> <li>Carry out reliability analyses using the partially truncated resistance distribution.</li></ol> <p>Preliminary findings are presented assuming the load and original resistance distributions are normal. Two example calculations demonstrate the applicability of the method, and indicate ist potential value in determining the necessary test load magnitude to achieve a desired reliability index.</p>
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Li, Jiangyun, Wang Sheng, Qing Chang und Yi Zhou. „Application of LID Attribute Index Evaluation Method in the Design of Urban Stormwater Control“. In International Low Impact Development Conference China 2016. Reston, VA: American Society of Civil Engineers, 2017. http://dx.doi.org/10.1061/9780784481042.007.

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Li, Xing, Sichao Tan, Zhengpeng Mi, Peiyao Qi und Yunlong Huang. „Flow and Temperature Fields Measurement Inside Rod Bundle by the Combined Use of PIV and LIF Technique“. In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81526.

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Thermal hydraulic research of reactor core is important in nuclear energy applications, the flow and heat transfer characteristics of coolant in reactor fuel assembly has a great influence on the performance and safety of nuclear power plants. Particle image velocimetry (PIV) and Laser induced fluorescence (LIF) are the instantaneous, non-intrusive, whole-field fluid mechanics measuring method. In this study, the simultaneous measurement of flow field and temperature field for a rod bundle was conducted using PIV and LIF technique. A facility system, utilizing the matching index of refraction approach, has been designed and constructed for the measurement of velocity and temperature in the rod bundle. In order for further study on complex heat and mass transfer characteristic of rod bundle, the single-phase experiments on the heating conditions are performed. One of unique characteristics of the velocity and temperature distribution downstream the spacer grid was obtained. The experimental results show that the combined use of PIV and LIF technique is applied to the measurement of multi-physical field in a rod bundle is feasible, the measuring characteristics of non-intrusive ensured accuracy of whole field data. The whole field experimental data obtained in rod bundle benefits the design of spacer grid geometry.
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Chiamenti, Ismael, und Hypolito José Kalinowski. „Estimate of Refractive Index Changes of Optical Waveguides Recorded by Femtosecond Laser in LiF Crystal“. In Latin America Optics and Photonics Conference. Washington, D.C.: OSA, 2012. http://dx.doi.org/10.1364/laop.2012.lt4b.3.

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Li, Botong, Liancun Zheng und Xinxin Zhang. „Unsteady Forced Convection Heat Transfer for Power Law Fluids in a Pipe“. In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22150.

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This paper studied the problem of forced convection heat transfer for power law fluids in a pipe which was affected by the varying inlet temperature. The fluid flow was hydrodynamically fully-developed and laminar while the effects of viscous dissipation and the power law kinematic viscosity on heat transfer were considered. A control volume technique based on the finite difference model coupled with the LU decomposition method was adopted and the least squares polynomial was introduced to approximate the non-linear items. The results show that the heat transfer behaviors are strongly depending on the value of the power law index. It is found that the thermal wave of the inlet temperature has less penetration with the increasing axial coordinate, and the effect of heat transfer is dominant away from the wall. The temperature profile is flatter as the power law index increases, which is implies that the shear-thickening non-Newtonian flows are affected easier by the inlet temperature than the shear-thinning fluids.
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Berichte der Organisationen zum Thema "Liu index"

1

Nahmer, Thomas. Die Investition in Fine Wine unter Diversifikations- und Kostengesichtspunkten. Sonderforschungsgruppe Institutionenanalyse, 2018. http://dx.doi.org/10.46850/sofia.9783941627710.

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Dieses Papier untersucht die Sinnhaftigkeit von Fine Wine als Alternatives Investment unter besonderer Berücksichtigung der Kosten eines Fine Wine Investments. Ist Fine Wine zur weiteren Diversifizierung und damit zur Verbesserung des Risikio-Return-Profils von global in Aktien und Anleihen investierenden Portfolios geeignet? Die Analyse erfolgt in einem ersten Schritt auf Indexbasis und in einem zweiten Schritt auf Basis von realen Investitions-möglichkeiten. Die Referenzwährungen sind der US-Dollar und der Euro. Für die Indexbetrachtung werden auf der Aktienseite der MSCI-World-Index und für die Anleihen der JPM-World-Government-Bond-Index verwendet. Bei den Daten für die Investition in Fine Wine liegt der Fokus auf dem Liv-ex-50-Index der im Jahre 1999 gegründeten Londoner Weinbörse Liv-ex. Bei der realen Investition werden für die Datenanalyse bei Aktien und Anleihen Indexfonds verwendet. Da es für die Investition in Fine Wine keinen Indexfonds gibt, wird der Liv-ex-50-Index inklusive aller Kosten einer realen Investition berechnet. Es werden verschiedene Portfoliozusammensetzungen verglichen. Zum einen wird ein Portfolio aus 50% Aktien und 50% Anleihen einem Portfolio aus 45% Aktien, 45% Anleihen und 10% Fine Wine gegenübergestellt. Zum an-deren wird ein Portfolio aus 25% Aktien und 75% Anleihen gegen ein Portfolio aus 20% Aktien, 70% Anleihen und 10% Fine Wine gemessen. Als Vergleichsmaßstab werden die annualisierte Rendite, die Standardabweichung sowie das Sharpe-Ratio der jeweiligen Portfolios berechnet. Die Ergebnisse für die genannten Zeiträume sind ernüchternd. Die Beimischung von Fine Wine führt auf Indexebene lediglich zu einer leichten Verbesserung der annualisierten Rendite aber zu einer markanten Erhöhung des Risi-kos. Bei der Betrachtung der realen Investition kommen die hohen Kosten eines Investments in Fine Wine zum Tragen. Die annualisierte Rendite ist im Vergleich zu den Portfolios ohne Beimischung von Fine Wine niedriger bei gleichzeitig höheren Risikowerten. Lediglich bei der Betrachtung auf Indexbasis in Euro kann bei einem Portfolio eine leichte Verbesserung der Sharpe-Ratio verzeichnet werden. Bei der Betrachtung nach Kosten führt in allen Fällen die Beimischung von Fine Wine zu einer Verschlechterung der Sharpe-Ratios.
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Wraight, Sarah, Julia Hofmann, Justine Allpress und Brooks Depro. Environmental justice concerns and the proposed Atlantic Coast Pipeline route in North Carolina. RTI Press, März 2018. http://dx.doi.org/10.3768/rtipress.2018.mr.0037.1803.

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This report describes publicly available data sets and quantitative analysis that local communities can use to evaluate environmental justice concerns associated with pipeline projects. We applied these data and analytical methods to two counties in North Carolina (Northampton and Robeson counties) that would be affected by the proposed Atlantic Coast Pipeline (ACP). We compared demographic and vulnerability characteristics of census blocks, census block groups, and census tracts that lie within 1 mile of the proposed pipeline route with corresponding census geographies that lie outside of the 1-mile zone. Finally, we present results of a county-level analysis of race and ethnicity data for the entire North Carolina segment of the proposed ACP route. Statistical analyses of race and ethnicity data (US Census Bureau) and Social Vulnerability Index scores (University of South Carolina’s Hazards & Vulnerability Research Institute) yielded evidence of significant differences between the areas crossed by the pipeline and reference geographies. No significant differences were found in our analyses of household income and cancer risk data.
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