2,811 research outputs found
Yves-Heng Lim
No full textYves-Heng Lim est enseignant-chercheur au Département d’Etudes de Sécurité et de Criminologie de l’Université Macquarie, Sydney. Il est l’auteur de China’s Naval Power: An Offensive Realist Approach (Ashgate, 2014). Yves-Heng Lim is a lecturer at the Department of Security Studies and Criminology, Macquarie University. He is the author of China’s Naval Power: An Offensive Realist Approach (Ashgate, 2014)
Nesterov acceleration of the Griffin-Lim Algorithm for phase recovery
No full textLAUREA MAGISTRALEIl problema della ricostruzione di fase consiste nella ricostruzione di un segnale ignoto dalla sola ampiezza della sua trasformata di Fourier ed è un punto cruciale nelle applicazioni di elaborazione dei segnali, comprese la sintesi audio, la sintesi vocale, la separazione di sorgenti e il trasferimento del timbro. L'algoritmo di Griffin-Lim, pubblicato nel 1984, è tuttora quello di riferimento in questo contesto. Nella presente tesi si dimostra che questo celebre metodo, noto come di doppia proiezione, è l'algoritmo di discesa del gradiente di una misura di distanza spettrale con gradiente lipschitziano e, seguendo il fondamentale risultato matematico di Nesterov, ne viene proposto un metodo accelerato convergente che chiamiamo Nesterov accelerated Griffin-Lim algorithm. Esso fa uso di una successione di momenti inerziali variabile col numero i delle iterazioni. Come corollario del risultato teorico principale, applicando la teoria della convessità locale, si dimostra che la velocità di convergenza dell'algoritmo di Griffin-Lim ad un minimo locale della misura di distanza spettrale è O(1/i) mentre quella del metodo proposto si dimostra essere O(1/i^2). La valutazione dell'algoritmo qui introdotto avviene attraverso il confronto con quello inerziale a momento costante di Fast Griffin-Lim che è l'accelerazione più usata del metodo originale. I risultati sperimentali mostrano che nei casi esaminati il metodo proposto è più performante in termini di rapporto segnale rumore spettrale in dB. Questo vale sia inizializzando gli algoritmi con fasi random che attraverso fasi con informazioni a priori sul segnale, portando a divari piu' grandi nel secondo caso.Phase recovery refers to the problem of retrieving an unknown time-domain signal from the sole magnitude of its Short-Time Fourier Transform and is a crucial point in signal processing applications including audio synthesis, text to speech synthesis, source separation and timbre transfer. The Griffin-Lim algorithm, published in 1984, is still a key reference to this field. In this thesis we prove that this celebrated method, known as a double projection procedure, is the gradient descent algorithm for a suitable L-Smooth spectral distance measure, and, following the fundamental mathematical result by Nesterov, we then propose a converging accelerated version of it, which we call Nesterov accelerated Griffin-Lim algorithm. This is based on a variable sequence of inertial momenta depending on the number i of iterations. As a corollary of our main theoretical result, applying the locally convex theory, we prove that the rate of convergence to a local minimum value of the spectral distance measure is O(1/i) for the Griffin-Lim algorithm, improved to O(1/i^2) by the proposed method. We compare our Nesterov accelerated Griffin-Lim algorithm with the inertial with constant momentum fast Griffin-Lim algorithm, which is the mostly used enhancement of the original method. Experimental results for the considered signals show that our algorithm obtains higher values in dB of Spectral Signal Noise Ratio. This is valid for initialization of the methods with both random phases and phases with prior signal knowledge, leading to wider gaps in the latter case
The Asia-Pacific Clinical Practice Guidelines for the management of frailty
No full textAbstract not availableElsa Dent, Christopher Lien, Wee Shiong Lim, Wei Chin Wong, Chek Hooi Wong, Tze Pin Ng, Jean Woo, Birong Dong, Shelley de la Vega, Philip Jun Hua Poi, Shahrul Bahyah Binti Kamaruzzaman, Chang Won, Liang-Kung Chen, Kenneth Rockwood, Hidenori Arai, Leocadio Rodriguez-Mañas, Li Cao, Matteo Cesari, Piu Chan, Edward Leung , Francesco Landi, Linda P. Fried, John E. Morley, Bruno Vellas, Leon Flicke
Professional attachment report [with] Chio Lim & Associates.
No full textThis report serves as a summary of the professional attachment. Besides touching on author experiences working with Chio Lim & Associates (CLA), it wil also touch on other issues before, during and after the program
Lim-inf convergence and its compactness
No full textAbstract- We describe the Mizar formalization of the proof of compactness of lim-inf convergence given in [W33] according to [CCL]. Lim-inf convergence formalized in [W28] is a Moore-Smith convergence investigated in [Y6] and involves the concept of nets. The proof is based on the equivalence of two approaches to convergence in topological spaces: filter convergence and Moore-Smith (net) convergence. The equivalence is worked out in [Y19] and different characterizations of compactness are also given there. These efforts are a continuation of the international project of formalizing the theory of continuous lattices headed by the first author
“Survival – to keep writing”: An interview with Shirley Geok-lin Lim
No full textIn this e-mail interview conducted in 2016, author and scholar Shirley Geok-lin Lim addresses the changing social and political conditions in the United States. Lim discusses the affective relationship between aesthetics and politics in her work, the anxiety of multilingual stylistics, and the in-between nature of the transnation. She also reflects on the academic marginalization she has experienced as a result of her immigrant designation and subjectivity, as well as the indirect influence of China and Chineseness on her writing. Commenting on her memoir Among the White Moon Faces, Lim notes the difficulty of titling, and addresses the impact of anglophone literature upon her during her colonial Malaysian upbringing
Majelis Ta’lim Sebagai Alternatif Pusat Pendidikan Islam (Studi Kasus pada Majelis Ta’lim Se Kecamatan Natar Lampung Selatan)
No full textIn the public, living we see routine activities what is done. The routine activities are religious and non religious. Usually, religious activities are done in majelis ta’lim. Majelis ta’lim that grow in the community can to became alternative for central of islamic education if the managed well. Therefore, the author want to discuss about this issue with expectation to know of factors that cause the failure religious building in majelis ta’lim especially in Natar, so to know activities that required to done so as really became alternative for central of Islamic education. This research is quantitative research with collecting data from majelis ta’lim which became this research object. The collecting data is done with instruments: as observation, interview, and documentation. From this research, we can know that style and methode is done by the teacher is principal key to success in majelis ta’lim. Therefore, the inovation is required in majelis ta’lim activities so that can interest of more pilgrims and make him the alternative for central of Islamic education
Interactions between LHX3-And ISL1-family LIM-homeodomain transcription factors are conserved in Caenorhabditis elegans
No full text© 2017 The Author(s). LIM-Homeodomain (LIM-HD) transcription factors are highly conserved in animals where they are thought to act in a transcriptional 'LIM code' that specifies cell types, particularly in the central nervous system. In chick and mammals the interaction between two LIM-HD proteins, LHX3 and Islet1 (ISL1), is essential for the development of motor neurons. Using yeast two-hybrid analysis we showed that the Caenorhabditis elegans orthologs of LHX3 and ISL1, CEH-14 and LIM-7 can physically interact. Structural characterisation of a complex comprising the LIM domains from CEH-14 and a LIM-interaction domain from LIM-7 showed that these nematode proteins assemble to form a structure that closely resembles that of their vertebrate counterparts. However, mutagenic analysis across the interface indicates some differences in the mechanisms of binding. We also demonstrate, using fluorescent reporter constructs, that the two C. elegans proteins are co-expressed in a small subset of neurons. These data show that the propensity for LHX3 and Islet proteins to interact is conserved from C. elegans to mammals, raising the possibility that orthologous cell specific LIM-HD-containing transcription factor complexes play similar roles in the development of neuronal cells across diverse species
“Survival -- to keep writing”: an interview with Shirley Geok-lin Lim
No full textIn this e-mail interview conducted in 2016, author and scholar Shirley Geok-lin Lim addresses the changing social and political conditions in the United States. Lim discusses the affective relationship between aesthetics and politics in her work, the anxiety of multilingual stylistics, and the in-between nature of the transnation. She also reflects on the academic marginalization she has experienced as a result of her immigrant designation and subjectivity, as well as the indirect influence of China and Chineseness on her writing. Commenting on her memoir Among the White Moon Faces, Lim notes the difficulty of titling, and addresses the impact of anglophone literature upon her during her colonial Malaysian upbringing
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