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Trọng Phụng Đỗ

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University of California, Santa Barbara

University of British Columbia

University College Cork

Kansas State University

Ucla

Kati (Katalin) Prajda

University of Vienna

Roshan Chitrakar

Nepal College of Information Technology

Graduate Center of the City University of New York

State University of Tetova

Viacheslav Kuleshov

Stockholm University

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Papers by Trọng Phụng Đỗ

Admission Control for Assuring Communication Quality in VANETs integrated with Wireless LAN Mesh Networks

IEICE Technical Report; IEICE Tech. Rep., Mar 1, 2012

ABSTRACT

A Combined Differential Navigation and Communication Scheme for Unmanned Arial Vehicles for Supporting Search and Rescue Activities at High-rise Buildings

IEICE Technical Report; IEICE Tech. Rep., Nov 25, 2013

Gradience and parametric variation

Proceedings of International Conferences of Experimental Linguistics, 2019

The paper assesses the consequences of gradience for approaches to variation based on the Princip... more The paper assesses the consequences of gradience for approaches to variation based on the Principles and Parameters model. In particular, the discussion focuses on recent crosslinguistic results obtained through magnitude estimation, a methodology particularly suited to the study of gradient acceptability/grammaticality. Results on superiority and relativised minimality effects in questions are discussed in the light of current theoretical assumptions regarding the locus of crosslinguistic variation.

Proceedings of the 9th International Workshop on Tree Adjoining Grammars and Related Formalisms

Intro to Bayesian Data Analysis & Cognitive Modeling

Research and Implementation a Short-Wave Transceiver System using FPGA/DSP based on SDR Technology

International Journal of Computer Applications, 2018

In this paper, a model of radio transceiver for HF communication with Amplitude Modulation (DSBSC... more In this paper, a model of radio transceiver for HF communication with Amplitude Modulation (DSBSC/SSBSC) using FPGA based on Software Defined Radio (SDR) technique is proposed. Due to the advantages of SDR technique, the transceiver can process directly and flexibly HF signal in digital domain and integrate with data processing software using standardized protocols. The results of transceiver's operational test with real-time voice signals which are analyzed based on experimental measurements demonstrate feasibility and scalability with customizable features for practical applications.

An Imitation Learning Approach to Unsupervised Parsing

Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics, 2019

Recently, there has been an increasing interest in unsupervised parsers that optimize semanticall... more Recently, there has been an increasing interest in unsupervised parsers that optimize semantically oriented objectives, typically using reinforcement learning. Unfortunately, the learned trees often do not match actual syntax trees well. Shen et al. (2018) propose a structured attention mechanism for language modeling (PRPN), which induces better syntactic structures but relies on ad hoc heuristics. Also, their model lacks interpretability as it is not grounded in parsing actions. In our work, we propose an imitation learning approach to unsupervised parsing, where we transfer the syntactic knowledge induced by the PRPN to a Tree-LSTM model with discrete parsing actions. Its policy is then refined by Gumbel-Softmax training towards a semantically oriented objective. We evaluate our approach on the All Natural Language Inference dataset and show that it achieves a new state of the art in terms of parsing F-score, outperforming our base models, including the PRPN. 1

Unsupervised Visual Sense Disambiguation for Verbs using Multimodal Embeddings

Proceedings of the 2016 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, 2016

We introduce a new task, visual sense disambiguation for verbs: given an image and a verb, assign... more We introduce a new task, visual sense disambiguation for verbs: given an image and a verb, assign the correct sense of the verb, i.e., the one that describes the action depicted in the image. Just as textual word sense disambiguation is useful for a wide range of NLP tasks, visual sense disambiguation can be useful for multimodal tasks such as image retrieval, image description, and text illustration. We introduce VerSe, a new dataset that augments existing multimodal datasets (COCO and TUHOI) with sense labels. We propose an unsupervised algorithm based on Lesk which performs visual sense disambiguation using textual, visual, or multimodal embeddings. We find that textual embeddings perform well when goldstandard textual annotations (object labels and image descriptions) are available, while multimodal embeddings perform well on unannotated images. We also verify our findings by using the textual and multimodal embeddings as features in a supervised setting and analyse the performance of visual sense disambiguation task. VerSe is made publicly available and can be downloaded at: https://github. com/spandanagella/verse.

A Combined Differential Navigation and Communication Scheme for Unmanned Arial Vehicles for Supporting Search and Rescue Activities at High-rise Buildings (Space, Aeronautical and Navigational Electronics)

電子情報通信学会技術研究報告 Ieice Technical Report 信学技報, Dec 2, 2013

Analyse structurelle de réseaux de capteurs pour la commande et l'observation

Http Www Theses Fr, Sep 23, 2011

Bibliographie Annexe Le premier problème que nous considérons dans cette thèse est le problème du... more Bibliographie Annexe Le premier problème que nous considérons dans cette thèse est le problème du rejet de perturbations par retour de mesure. Les systèmes dynamiques sont souvent affectés par des perturbations. Pour assurer certaines performances du système, il faut donc éliminer ou réduire si possible l'effet des perturbation. Certaines approches permettent de minimiser la norme de la matrice de transfert entre les perturbations et les sorties à réguler [Vidyasagar, 1987]. Dans notre travail, nous nous intéressons au problème du rejet de perturbation exact par retour de mesure. Ce problème consiste à commander un système, à l'aide d'un retour dynamique de sortie mesurée, pour que la matrice de transfert entre les perturbations et les sorties à réguler soit nulle. Le retour dynamique est

Admission Control for Assuring Communication Quality in VANETs integrated with Wireless LAN Mesh Networks

ABSTRACT

Designing a Real-time Image Monitoring System over 3G Mobile Networks

ABSTRACT

New computational modeling for solving higher order ODE based on FPGA

2009 2nd International Workshop on Nonlinear Dynamics and Synchronization, 2009

In this paper we propose a method for solving complex higher order ordinary differential equation... more In this paper we propose a method for solving complex higher order ordinary differential equations (ODE) based on an emulation of the analog computing paradigm on digital hardware platforms. In this case, we mimic real analog system elements by digital discretized models. Due to the flexibility and reconfigurability of FPGA and also the possibility of system behavioral modeling through hardware description languages (HDL), we are able to create all fundamental elements that are necessary to both simulating complex systems and the modeling of any ordinary differential equations (ODE) or a system simulation based on ODEs. We therefore propose a novel methodology of solving systems and higher order ODEs. This technique is similar to the analog computing but with the key difference that we possess more flexibility and are able to control at will the precision level wanted/needed. Further features are values scaling of both the results and internal variables.

A novel method for computing the minimum spanning tree and solution based on Cellular Neural Networks implemented on digital platforms

2009 2nd International Workshop on Nonlinear Dynamics and Synchronization, 2009

A probabilistic corpus-based model of parallelism

Pointing error effects on performance of free-space optical communication systems using SC-QAM signals over atmospheric turbulence channels

AEU - International Journal of Electronics and Communications, 2014

In this paper, we theoretically analyze pointing error effects on performance of free-space optic... more In this paper, we theoretically analyze pointing error effects on performance of free-space optical (FSO) communication systems using subcarrier intensity quadrature amplitude modulation (SC-QAM) signals over atmospheric turbulence channels. Unlike previous studies, we take into account both atmospheric turbulence channels and the pointing error effect. In order to model atmospheric turbulence channels, we employ a log-normal distribution for weak-to-moderate turbulent condition and a gamma-gamma distribution for strong turbulent condition. Moreover, we study the pointing error effect by taking into account the influence of beamwidth, aperture size and jitter variance. In addition, we use a combination of these models to analyze the combined effect of atmospheric turbulence and pointing error to FSO/SC-QAM systems. Finally, we derive analytical expressions to evaluate the average symbol error rate (ASER) performance of such systems. Numerical results present the impact of pointing error on the performance of FSO/SC-QAM systems and how we use proper values of aperture size and beamwidth to improve the performance of such systems. In addition, simulation results of FSO/SC-QAM performance over strong atmospheric turbulence and pointing errors show that the closed-form expression can provide a precision for evaluating ASER of such systems.

Effect of the Intrawall Microporosity on the Diffusion Characterization of Bi-Porous SBA-15 Materials

NATO Science Series II: Mathematics Physics and Chemistry

In our recent study [1], a series of synthesized SBA-15 materials were characterized by nitrogen ... more In our recent study [1], a series of synthesized SBA-15 materials were characterized by nitrogen adsorption/desorption isotherms at 77K, and four of them (MMS-1-RT, MMS-1-60, MMS-1-80 and MMS-5-80) were investigated by the ZLC technique involving n-heptane diffusion at a low concentration level. SBA-15 materials proved to have a broad pore size distribution within the micropore/small-mesopore range in the walls of

A load-balanced and mobility-aware routing protocol for vehicular ad-hoc networks

The 2011 International Conference on Advanced Technologies for Communications (ATC 2011), 2011

VANET (Vehicular Ad-hoc NETwork) is comprised of devices that are installed inside vehicles and o... more VANET (Vehicular Ad-hoc NETwork) is comprised of devices that are installed inside vehicles and on road sides. Since vehicles can move randomly and at various velocities, the network topology is highly dynamic. Consequently, links between network nodes could be broken at anytime and communications from vehicle to vehicle could be corrupted. For this reason, a routing protocol independent of the

A Service-Oriented Design for Controlling Multimedia Sessions over Stand-Alone MANETs

2010 6th World Congress on Services, 2010

Efficient delivery of monitoring data in networked fishing boats

International Conference on Communications and Electronics 2010, 2010

This paper describes a novel comprehensive framework for transporting data over mobile ad hoc net... more This paper describes a novel comprehensive framework for transporting data over mobile ad hoc networks supporting seamen of fishing boats. Data representing boat status, urgent signals, announcement, etc are generated and delivered to the monitoring stations within a predefined time interval. We design a cross-layer architecture respecting both time constraint on data delivery and communication efficiency. Sending and deliberate retransmissions

Admission Control for Assuring Communication Quality in VANETs integrated with Wireless LAN Mesh Networks

IEICE Technical Report; IEICE Tech. Rep., Mar 1, 2012

ABSTRACT

A Combined Differential Navigation and Communication Scheme for Unmanned Arial Vehicles for Supporting Search and Rescue Activities at High-rise Buildings

IEICE Technical Report; IEICE Tech. Rep., Nov 25, 2013

Gradience and parametric variation

Proceedings of International Conferences of Experimental Linguistics, 2019

The paper assesses the consequences of gradience for approaches to variation based on the Princip... more The paper assesses the consequences of gradience for approaches to variation based on the Principles and Parameters model. In particular, the discussion focuses on recent crosslinguistic results obtained through magnitude estimation, a methodology particularly suited to the study of gradient acceptability/grammaticality. Results on superiority and relativised minimality effects in questions are discussed in the light of current theoretical assumptions regarding the locus of crosslinguistic variation.

Proceedings of the 9th International Workshop on Tree Adjoining Grammars and Related Formalisms

Intro to Bayesian Data Analysis & Cognitive Modeling

Research and Implementation a Short-Wave Transceiver System using FPGA/DSP based on SDR Technology

International Journal of Computer Applications, 2018

In this paper, a model of radio transceiver for HF communication with Amplitude Modulation (DSBSC... more In this paper, a model of radio transceiver for HF communication with Amplitude Modulation (DSBSC/SSBSC) using FPGA based on Software Defined Radio (SDR) technique is proposed. Due to the advantages of SDR technique, the transceiver can process directly and flexibly HF signal in digital domain and integrate with data processing software using standardized protocols. The results of transceiver's operational test with real-time voice signals which are analyzed based on experimental measurements demonstrate feasibility and scalability with customizable features for practical applications.

An Imitation Learning Approach to Unsupervised Parsing

Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics, 2019

Recently, there has been an increasing interest in unsupervised parsers that optimize semanticall... more Recently, there has been an increasing interest in unsupervised parsers that optimize semantically oriented objectives, typically using reinforcement learning. Unfortunately, the learned trees often do not match actual syntax trees well. Shen et al. (2018) propose a structured attention mechanism for language modeling (PRPN), which induces better syntactic structures but relies on ad hoc heuristics. Also, their model lacks interpretability as it is not grounded in parsing actions. In our work, we propose an imitation learning approach to unsupervised parsing, where we transfer the syntactic knowledge induced by the PRPN to a Tree-LSTM model with discrete parsing actions. Its policy is then refined by Gumbel-Softmax training towards a semantically oriented objective. We evaluate our approach on the All Natural Language Inference dataset and show that it achieves a new state of the art in terms of parsing F-score, outperforming our base models, including the PRPN. 1

Unsupervised Visual Sense Disambiguation for Verbs using Multimodal Embeddings

Proceedings of the 2016 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, 2016

We introduce a new task, visual sense disambiguation for verbs: given an image and a verb, assign... more We introduce a new task, visual sense disambiguation for verbs: given an image and a verb, assign the correct sense of the verb, i.e., the one that describes the action depicted in the image. Just as textual word sense disambiguation is useful for a wide range of NLP tasks, visual sense disambiguation can be useful for multimodal tasks such as image retrieval, image description, and text illustration. We introduce VerSe, a new dataset that augments existing multimodal datasets (COCO and TUHOI) with sense labels. We propose an unsupervised algorithm based on Lesk which performs visual sense disambiguation using textual, visual, or multimodal embeddings. We find that textual embeddings perform well when goldstandard textual annotations (object labels and image descriptions) are available, while multimodal embeddings perform well on unannotated images. We also verify our findings by using the textual and multimodal embeddings as features in a supervised setting and analyse the performance of visual sense disambiguation task. VerSe is made publicly available and can be downloaded at: https://github. com/spandanagella/verse.

A Combined Differential Navigation and Communication Scheme for Unmanned Arial Vehicles for Supporting Search and Rescue Activities at High-rise Buildings (Space, Aeronautical and Navigational Electronics)

電子情報通信学会技術研究報告 Ieice Technical Report 信学技報, Dec 2, 2013

Analyse structurelle de réseaux de capteurs pour la commande et l'observation

Http Www Theses Fr, Sep 23, 2011

Bibliographie Annexe Le premier problème que nous considérons dans cette thèse est le problème du... more Bibliographie Annexe Le premier problème que nous considérons dans cette thèse est le problème du rejet de perturbations par retour de mesure. Les systèmes dynamiques sont souvent affectés par des perturbations. Pour assurer certaines performances du système, il faut donc éliminer ou réduire si possible l'effet des perturbation. Certaines approches permettent de minimiser la norme de la matrice de transfert entre les perturbations et les sorties à réguler [Vidyasagar, 1987]. Dans notre travail, nous nous intéressons au problème du rejet de perturbation exact par retour de mesure. Ce problème consiste à commander un système, à l'aide d'un retour dynamique de sortie mesurée, pour que la matrice de transfert entre les perturbations et les sorties à réguler soit nulle. Le retour dynamique est

Admission Control for Assuring Communication Quality in VANETs integrated with Wireless LAN Mesh Networks

ABSTRACT

Designing a Real-time Image Monitoring System over 3G Mobile Networks

ABSTRACT

New computational modeling for solving higher order ODE based on FPGA

2009 2nd International Workshop on Nonlinear Dynamics and Synchronization, 2009

In this paper we propose a method for solving complex higher order ordinary differential equation... more In this paper we propose a method for solving complex higher order ordinary differential equations (ODE) based on an emulation of the analog computing paradigm on digital hardware platforms. In this case, we mimic real analog system elements by digital discretized models. Due to the flexibility and reconfigurability of FPGA and also the possibility of system behavioral modeling through hardware description languages (HDL), we are able to create all fundamental elements that are necessary to both simulating complex systems and the modeling of any ordinary differential equations (ODE) or a system simulation based on ODEs. We therefore propose a novel methodology of solving systems and higher order ODEs. This technique is similar to the analog computing but with the key difference that we possess more flexibility and are able to control at will the precision level wanted/needed. Further features are values scaling of both the results and internal variables.

A novel method for computing the minimum spanning tree and solution based on Cellular Neural Networks implemented on digital platforms

2009 2nd International Workshop on Nonlinear Dynamics and Synchronization, 2009

A probabilistic corpus-based model of parallelism

Pointing error effects on performance of free-space optical communication systems using SC-QAM signals over atmospheric turbulence channels

AEU - International Journal of Electronics and Communications, 2014

In this paper, we theoretically analyze pointing error effects on performance of free-space optic... more In this paper, we theoretically analyze pointing error effects on performance of free-space optical (FSO) communication systems using subcarrier intensity quadrature amplitude modulation (SC-QAM) signals over atmospheric turbulence channels. Unlike previous studies, we take into account both atmospheric turbulence channels and the pointing error effect. In order to model atmospheric turbulence channels, we employ a log-normal distribution for weak-to-moderate turbulent condition and a gamma-gamma distribution for strong turbulent condition. Moreover, we study the pointing error effect by taking into account the influence of beamwidth, aperture size and jitter variance. In addition, we use a combination of these models to analyze the combined effect of atmospheric turbulence and pointing error to FSO/SC-QAM systems. Finally, we derive analytical expressions to evaluate the average symbol error rate (ASER) performance of such systems. Numerical results present the impact of pointing error on the performance of FSO/SC-QAM systems and how we use proper values of aperture size and beamwidth to improve the performance of such systems. In addition, simulation results of FSO/SC-QAM performance over strong atmospheric turbulence and pointing errors show that the closed-form expression can provide a precision for evaluating ASER of such systems.

Effect of the Intrawall Microporosity on the Diffusion Characterization of Bi-Porous SBA-15 Materials

NATO Science Series II: Mathematics Physics and Chemistry

In our recent study [1], a series of synthesized SBA-15 materials were characterized by nitrogen ... more In our recent study [1], a series of synthesized SBA-15 materials were characterized by nitrogen adsorption/desorption isotherms at 77K, and four of them (MMS-1-RT, MMS-1-60, MMS-1-80 and MMS-5-80) were investigated by the ZLC technique involving n-heptane diffusion at a low concentration level. SBA-15 materials proved to have a broad pore size distribution within the micropore/small-mesopore range in the walls of

A load-balanced and mobility-aware routing protocol for vehicular ad-hoc networks

The 2011 International Conference on Advanced Technologies for Communications (ATC 2011), 2011

VANET (Vehicular Ad-hoc NETwork) is comprised of devices that are installed inside vehicles and o... more VANET (Vehicular Ad-hoc NETwork) is comprised of devices that are installed inside vehicles and on road sides. Since vehicles can move randomly and at various velocities, the network topology is highly dynamic. Consequently, links between network nodes could be broken at anytime and communications from vehicle to vehicle could be corrupted. For this reason, a routing protocol independent of the

A Service-Oriented Design for Controlling Multimedia Sessions over Stand-Alone MANETs

2010 6th World Congress on Services, 2010

Efficient delivery of monitoring data in networked fishing boats

International Conference on Communications and Electronics 2010, 2010

This paper describes a novel comprehensive framework for transporting data over mobile ad hoc net... more This paper describes a novel comprehensive framework for transporting data over mobile ad hoc networks supporting seamen of fishing boats. Data representing boat status, urgent signals, announcement, etc are generated and delivered to the monitoring stations within a predefined time interval. We design a cross-layer architecture respecting both time constraint on data delivery and communication efficiency. Sending and deliberate retransmissions