337,113 research outputs found
The dialogue between the author and the hero in the “Notes” of G. R. Derzhavin
No full textВ центре внимания автора статьи «Записки» Г. Р. Державина, представляющие по своей сути его автобиографию. Труд этот был создан на закате жизни, он включает все важнейшие события жизни Г. Р. Державина, поэта и государственного деятеля. Рассказ ведется от третьего лица, что придает особую атмосферу повествованию, выстраивается своеобразный диалог между автором и героем, все это и является предметом исследования автора статьи.The focus of the author of the article “Notes” G. R. Derzhavin, representing in essence his autobiography. This work was created at the end of his life; it includes all the most important events in the life of G. R. Derzhavin, poet and statesman. The story is told in a third person, which gives a special atmosphere to the story, a certain dialogue emerges between the author and the hero, all this is the subject of the author's research
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Replication Data for: "Adoption of Distributed Solar across India"
No full textThis package includes all datasets and codes (in R) to replicate all analyses and figures in "Adoption of Distributed Solar across India," a forthcoming article on Energy for Sustainable Development.
To cite the dataset: Aklin, Michaël; Cheng, Chao-yo; Urpelainen, Johannes. Replication Data for: "Adoption of Distributed Solar across India." 2017. Harvard Dataverse, V1. http://doi:10.7910/DVN/GITJQ4
Replication Data for: "Adoption of Distributed Solar across India"
No full textThis package includes all datasets and codes (in R) to replicate all analyses and figures in "Adoption of Distributed Solar across India," a forthcoming article on Energy for Sustainable Development.
To cite the dataset: Aklin, Michaël; Cheng, Chao-yo; Urpelainen, Johannes. Replication Data for: "Adoption of Distributed Solar across India." 2017. Harvard Dataverse, V1. http://doi:10.7910/DVN/GITJQ4
Regarding “Hepatitis B Surface Antigen Positivity Is an Independent Unfavorable Prognostic Factor in Diffuse Large B-Cell Lymphoma in the Rituximab Era”
No full textThis letter to the editor remarks on the article by Cheng et al., which reported results of a retrospective study that assessed 5-year progression-free and overall survival (OS) of 98 patients with hepatitis B surface antigen-seropositive patients receiving R-CHOP-21 as remission induction for diffuse large B-cell lymphoma
Diffusion Approximation to the G/G/R Queue with Balking and Reneging
No full text此篇論文透過擴散法探討含有阻礙及放棄之G/G/R/N 排隊。由受限於兩個反映屏障的Fokker-Planck 方程式得到穩態擴散方程式。在交通繁忙(heavy traffic)的條件下，也就是說，在服務的狀態下，在系統裡幾乎有顧客存在，藉由更新定理(renewal theory)的基本觀念可得到擴散方程式裡的擴散參數的近似表示式。我們可以推導顧客數的近似機率密度函數。我們執行含有阻礙及放棄之M/M/R/N之排隊正確的結果和近似擴散的結果之比較分析。另外，我們計算系統顧客數的近似期望值和近似變異數。根據比較分析，對於複雜的排隊系統，擴散近似是一個有效率且有用的方法。This thesis studies the G/G/R/N queue with balking and reneging by using diffusion approximation. The steady-state diffusion equations are obtained from the Fokker-Planck equations subject to two reflecting barriers. The approximate expressions for the diffusion parameters of the diffusion equations are obtained by applying the basic concepts of the renewal theory under the heavy traffic conditions, that is, the number of customers in the service state are almost always nonempty. The expressions for the approximate probability density functions of the number of the customers in the system are obtained. We perform a comparative analysis between exact results and diffusion approximation results to the M/M/R/N queue with balking and reneging. In addition, we compute the approximate mean and variance of the number of customers in the system. Numerical results indicate that the diffusion approximation method provides an efficient and useful method for solving complex queueing systems.Contents
1. Introduction..........1
1.1 Problem Statement..........1
1.2 Literature Review..........2
1.3Diffusion Approximation..........4
1.4 Boundary Condition..........5
1.5 Scope of the Study..........6
2. M/M/R Queue with Balking and Reneging..........8
2.1 Development of the Equations..........8
2.2 Exact Steady-state Solutions..........11
2.3 Diffusion Steady-state Solutions..........12
3. G/G/R Queue with Balking and Reneging..........20
3.1 Approximation to the G/G/R Model..........20
3.1.1 The Expectation and Variance for the G/G/R Queue Length..........21
3.1.2 Approximate Expressions for the Diffusion Parameters in the G/G/R Queue..........24
3.2 Steady-state Diffusion Equations..........26
3.3 Determination of f(x), P0, E[X], Var[X]..........28
3.4 Comparative Analysis for the M/(G,M)/R, M/(G,G)/R, G/(G,M)/R and G/(G,G)/R Queues..........29
4. Conclusions and Future Research..........36
4.1 Conclusions..........36
4.2 Future Research..........37
Appendix A..........37
References..........3
THE CHENG-YAU METRICS ON REGULAR CONVEX CONES AS HARMONIC IMMERSIONS INTO THE SYMMETRIC SPACE OF POSITIVE DEFINITE REAL SYMMETRIC MATRICES
Full text linkA Riemannian metric g on a domain Ω in R^n defines a map Fg from (Ω, g) into the symmetric space of positive definite real symmetric n×n matrices (Sym+(n), h), where h is the Cheng-Yau metric on Sym+(n). We show that the map Fg is a harmonic immersion if Ω is a regular convex cone and g is the Cheng-Yau metric on Ω. We also prove that the map Fg is totally geodesic if Ω is a homogeneous self-dual regular convex cone and g is the Cheng-Yau metric on Ω
THE CHENG-YAU METRICS ON REGULAR CONVEX CONES AS HARMONIC IMMERSIONS INTO THE SYMMETRIC SPACE OF POSITIVE DEFINITE REAL SYMMETRIC MATRICES
No full textA Riemannian metric g on a domain Ω in R^n defines a map Fg from (Ω, g) into the symmetric space of positive definite real symmetric n×n matrices (Sym+(n), h), where h is the Cheng-Yau metric on Sym+(n). We show that the map Fg is a harmonic immersion if Ω is a regular convex cone and g is the Cheng-Yau metric on Ω. We also prove that the map Fg is totally geodesic if Ω is a homogeneous self-dual regular convex cone and g is the Cheng-Yau metric on Ω
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