62,723 research outputs found
Estimating value-at-risk for portfolios: skewed-EWMA forecasting via copula
No full textWith the increasing complexity of risks, how to estimate the risk of portfolios with complex dependencies is challenging. Recently, Lu and Huang (2007) proposed a skewed-b WMA procedure to calculate value-at-risk (VaR) for individual financial assets, which is derived from an asymmetric Laplace distribution and takes into account both skewness and heavy tails of the return distribution that are adaptive to the time-varying nature in practice by adjusting shape parameter in the distribution. In this paper, we extend the skewed-EWMA procedure to estimating the risk of complex portfolios with dependencies modelled via copula. Monte Carlo simulation procedure that combines copula techniques with skewed-EWMA forecasting is developed. The empirical backtesting evaluation of the VaR forecasting demonstrates that the proposed method can be a useful tool in estimating extreme risks of some complex portfolios
Ksavers Andermanis – LU Akadēmiskās nozīmītes meta autors
No full textRaksts tapis kā turpinājums 2024. gada septembra mēneša priekšmetam par Latvijas Universitātes (LU) Akadēmisko nozīmīti, kur uzmanība pievērsta LU Akadēmiskās nozīmītes meta autoram, LU Arhitektūras fakultātes studentam un novadpētniekam, vācbaltietim Ksaveram Andermanim. K. Andermanis ne tikai ir sniedzis ieguldījumu Latvijas etnogrāfijas pētniecībā, bet arī LU simbolu izgatavošanā, kas mūsdienās saglabā savu unikalitāti un vērtību. Meta autora piederība pie LU saimes sakņojusies jau viņa ģimenē, jo viņa tēvs ir absolvējis Rīgas Politehnisko institūtu, LU priekšteci starpkaru periodā, un strādājis LU Saimniecības padomē par inspektoru.The article is a continuation of the September 2024 Museum Object on the Academic Badge of the University of Latvia (UL), which focuses on the author of the UL Academic Badge design, the student of the Faculty of Architecture and local historian, the Baltic German Ksavers Andermanis. K. Andermanis has not only contributed to the research of Latvian ethnography, but also to the production of symbols of the UL, which today retain their uniqueness and value. The author's belonging to the UL family is rooted in his family, as his father graduated from the Riga Polytechnic Institute, the predecessor of UL during the interwar period, and worked as an inspector at the UL Economical council
Hyphocapnodia Z. H. Lu & Maharachch. 2022, gen. nov.
No full textHyphocapnodia Z. H. Lu & Maharachch., gen. nov. MycoBank number: MB 845348 Etymology: The name reflects the hyphomycetous morph phylogenetically related to Capnodium Saprobic on living and decaying branches. Sexual morph: not observed. Asexual morph: on the natural substrate, colonies effuse, hairy, black. Mycelium immersed and superficial, forming dark brown conidiomata. Conidiomata synnematous, erect, subcylindrical, dark brown to black, with conidiogenous cells distributed mostly laterally, mainly towards the upper half of the synnemata. Conidiophores macronematous, simple, dark brown. Conidiogenous cells monoblastic, cylindrical, integrated, determinate, and smooth. Conidia subcylindrical to fusiform, brown, transversely septate, conidial secession schizolytic. Type species: Hyphocapnodia sichuanensis Z. H. Lu, Wanas., Madrid & Maharachch., sp. nov.Published as part of Lu, Zheng-Hua, Wanasinghe, Dhanushka N., Madrid, Hugo & Maharachchikumbura, Sajeewa S. N., 2022, Hyphocapnodia sichuanensis gen. et sp. nov. (Capnodiaceae), a novel hyphomycete from Sichuan Province, China, pp. 84-94 in Phytotaxa 564 (1) on page 90, DOI: 10.11646/phytotaxa.564.1.6, http://zenodo.org/record/707786
Heterogeneous Liquidity Providers and Night-minus-day Return Predictability
No full textReplication package for "Heterogeneous Liquidity Providers and Night-minus-day Return Predictability" by Lu, Malliaris, and Qi
Figure 3 from: Lu Z, Sun Y (2019) Rhamnella brachycarpa (Rhamnaceae), a new species from Hainan Island, China. PhytoKeys 132: 19-29. https://doi.org/10.3897/phytokeys.132.36776
No full textFigure 3 Rhamnella brachycarpa Z. Qiang Lu & Y. Shuai Sun, sp. nov., drawn from the tree of Z.Q. Lu 2018HN3001
Lu Xun's Revolution : Writing in a Time of Violence /
No full textRecognized as modern China’s preeminent man of letters, Lu Xun (1881–1936) is revered as the nation’s conscience, a writer comparable to Shakespeare or Tolstoy. Gloria Davies’s vivid portrait gives readers a better sense of this influential author by situating the man Mao Zedong hailed as "the sage of modern China" in his turbulent time and place.Widely recognized as modern China’s preeminent man of letters, Lu Xun (1881–1936) is revered as the voice of a nation’s conscience, a writer comparable to Shakespeare and Tolstoy in stature and influence. Gloria Davies’s portrait now gives readers a better sense of this influential author by situating the man Mao Zedong hailed as "the sage of modern China" in his turbulent time and place. In Davies’s vivid rendering, we encounter a writer passionately engaged with the heady arguments and intrigues of a country on the eve of revolution. She traces political tensions in Lu Xun’s works which reflect the larger conflict in modern Chinese thought between egalitarian and authoritarian impulses. During the last phase of Lu Xun’s career, the so-called "years on the left," we see how fiercely he defended a literature in which the people would speak for themselves, and we come to understand why Lu Xun continues to inspire the debates shaping China today. Although Lu Xun was never a Communist, his legacy was fully enlisted to support the Party in the decades following his death. Far from the apologist of political violence portrayed by Maoist interpreters, however, Lu Xun emerges here as an energetic opponent of despotism, a humanist for whom empathy, not ideological zeal, was the key to achieving revolutionary ends. Limned with precision and insight, Lu Xun’s Revolution is a major contribution to the ongoing reappraisal of this foundational figure.Recognized as modern China’s preeminent man of letters, Lu Xun (1881–1936) is revered as the nation’s conscience, a writer comparable to Shakespeare or Tolstoy. Gloria Davies’s vivid portrait gives readers a better sense of this influential author by situating the man Mao Zedong hailed as "the sage of modern China" in his turbulent time and place.Widely recognized as modern China’s preeminent man of letters, Lu Xun (1881–1936) is revered as the voice of a nation’s conscience, a writer comparable to Shakespeare and Tolstoy in stature and influence. Gloria Davies’s portrait now gives readers a better sense of this influential author by situating the man Mao Zedong hailed as "the sage of modern China" in his turbulent time and place. In Davies’s vivid rendering, we encounter a writer passionately engaged with the heady arguments and intrigues of a country on the eve of revolution. She traces political tensions in Lu Xun’s works which reflect the larger conflict in modern Chinese thought between egalitarian and authoritarian impulses. During the last phase of Lu Xun’s career, the so-called "years on the left," we see how fiercely he defended a literature in which the people would speak for themselves, and we come to understand why Lu Xun continues to inspire the debates shaping China today. Although Lu Xun was never a Communist, his legacy was fully enlisted to support the Party in the decades following his death. Far from the apologist of political violence portrayed by Maoist interpreters, however, Lu Xun emerges here as an energetic opponent of despotism, a humanist for whom empathy, not ideological zeal, was the key to achieving revolutionary ends. Limned with precision and insight, Lu Xun’s Revolution is a major contribution to the ongoing reappraisal of this foundational figure.Electronic reproduction. :Mode of access: Internet via World Wide Web.DaviesGloria: Gloria Davies is a literary scholar and historian of China at Monash University in Australia. She is also Adjunct Director of the Australian Centre on China in the World at the Australian National University.Description based on online resource; title from PDF title page (publisher’s Web site, viewed May 26, 2011
Figure 1 from: Lu Z (2020) Carpinus gigabracteatus, a new species from southeast Yunnan, China. PhytoKeys 145: 47-56. https://doi.org/10.3897/phytokeys.145.49488
No full textFigure 1 Carpinus gigabracteatus Z. Qiang Lu A the whole plant, habitat and location B branches with infructescences and leaves C infructescences D leaf E bracts F nutlet
Figure 1 from: Lu Z (2020) Carpinus gigabracteatus, a new species from southeast Yunnan, China. PhytoKeys 145: 47-56. https://doi.org/10.3897/phytokeys.145.49488
No full textFigure 1 Carpinus gigabracteatus Z. Qiang Lu A the whole plant, habitat and location B branches with infructescences and leaves C infructescences D leaf E bracts F nutlet
Lu Xun zaoqi wenyan lunwen li suo tansuo de xin wenhua (The 'New Culture' formulated in Lu Xun's early classical-style essays)
No full textThis article links a number of the main themes expressed in Lu Xun's early wenyan essays, written in Japan in 1906-1908, with the concerns of the New Culture Movement, which emerged later (circa 1919) in China. The author argues that these book-length theses written in dense classical language were in fact intellectual precursors to the New Culture Movement and its aftermath. It delineates a partial outcome of the author's Australian Research Council (ARC) project on the early Lu Xun and his formative period in Japan
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