Papers by Tiến Khánh Trần
Key Economic Sectors and Their Transitions: Analysis of World Input-Output Network
In the modern society, all major economic sectors have been connected tightly in an extremely com... more In the modern society, all major economic sectors have been connected tightly in an extremely complicated global network. In this type of network, a small shock occurred at certain point can be spread instantly through the whole network and may cause catastrophe. Production systems, traditionally analyzed as almost independent national systems, are increasingly connected on a global scale. The world input-output database, only recently becoming available, is one of the first efforts to construct the global and multi-regional input-output tables. The usual way of identifying key sectors in an economy in Input-output analysis is using Leontief inverse matrix to measure the backward linkages and the forward linkages of each sector. In other words, evaluating the role of sectors is performed by means of their centrality assessment. Network analysis of the input-output tables can give valuable insights into identifying the key industries in a world-wide economy. The world input-output ta...
Buyer–Supplier Relationships, Sustainable Supplier Management, Green Design, and Firms’ Performance in Vietnam
Recent Developments in Vietnamese Business and Finance, 2021
Journal of Chemical Information and Modeling, 2015
Assessment of accurate drug binding affinity to a protein remains a challenge for in silico drug ... more Assessment of accurate drug binding affinity to a protein remains a challenge for in silico drug development. In this research, we used the smooth reaction path generation (SRPG) method to calculate binding free energies and determine potential of mean forces (PMFs) along the smoothed dissociation paths of influenza A neuraminidase and its variants with oseltamivir (Tamiflu) and zanamivir (Relenza) inhibitors. With the gained results, we found that the binding free energies of neuraminidase A/H5N1 in WT and two mutants (including H274Y and N294S) with oseltamivir and zanamivir show good agreement with experimental results. Additionally, the thermodynamic origin of the drug resistance of the mutants was also discussed from the PMF profiles.
Lecture Notes in Computer Science
This paper reports the results and experiments performed on the INEX 2006 Document Mining Challen... more This paper reports the results and experiments performed on the INEX 2006 Document Mining Challenge Corpus with the PCXSS clustering method. The PCXSS method is a progressive clustering method that computes the similarity between a new XML document and existing clusters by considering the structures within documents. We conducted the clustering task on the INEX and Wikipedia data sets.
Transient thermal tuning properties of single emitters in actively cooled high-power cm-bar arrays
SPIE Proceedings, 2004
Transient thermal properties of actively cooled InAlGaAs-based high-power diode laser arrays, so-... more Transient thermal properties of actively cooled InAlGaAs-based high-power diode laser arrays, so-called 'cm-bars', are investigated for 'low-frequency' pulsed operation with a repetition rate of 0.1-10 Hz. Under these operation conditions the devices experience almost complete thermal cycles between the temperature of the heat sink and the operation temperature typical for continuous wave operation. We analyze the thermal tuning behavior that
IEEE Transactions on Circuits and Systems, 1989
Absrract-Vector quantization (VQ) has emerged as a viable approach for coding speech and image da... more Absrract-Vector quantization (VQ) has emerged as a viable approach for coding speech and image data in the last decade. Various vector quantizers are designed and their performance evaluated during the last few years. The hardware realizations of VQ encoder systems have been designed mainly for real-time speech coding ranging from the use of "off-the-shelf" components to applying VLSI technology. Real-time image coding requires much higher throughput rate compared to speech data. In this paper, a practical high throughput architecture and its implementation for real-time coding of TV quality signals is presented. The architecture is directed towards the implementation of multi-stage VQ as our simulation results (presented in this paper) show that it is more suitable for real-time coding. However, the implementation is suitable for both single-stage and multi-stage VQ. The functional blocks of the VQ encoder system have been designed and implemented in VLSI technology. The VQ encoding scheme designed has an encoding delay of 25 clock cycles and it is independent of the codebook sue.
A High Quality Image Compression Scheme for Real-Time Applications
IEEE International Conference on Communications, 1986
Many image compression or coding techniques have been developed to reduce the amount of bits of i... more Many image compression or coding techniques have been developed to reduce the amount of bits of information needed to represent digital images. Among these, Vector Quantization (VQ) seems to have the edge; its theoretical distortion is lower than that of other block coding techniques at comparable bit rates. However, the application of Vector Quantization remains limited due to its high
Application rate and composting method affect the immediate and residual manure fertilizer value in a maize–rice–rice–maize cropping sequence on a degraded soil in northern Vietnam
Soil Science and Plant Nutrition, 2012
A field experiment was carried out in northern Vietnam to investigate the effects of adding diffe... more A field experiment was carried out in northern Vietnam to investigate the effects of adding different additives [rice (Oriza sativa L.) straw only, or rice straw with added lime, superphosphate (SSP), urea or a mixture of selected microorganism species] on nitrogen (N) losses and nutrient concentrations in manure composts. The composts and fresh manure were applied to a three-crop per
Central European Journal of Urology, 2012
A Systolic Architecture for Real-Time Composite Video Image Coding
MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's, 1986
Abstract Secure and reliable image transmission is achieved using a representation of video image... more Abstract Secure and reliable image transmission is achieved using a representation of video images in digital form and digital communication techniques. However, the digital representation results in a large increase in the transmission bandwidth required. Hence ...
Series in Machine Perception and Artificial Intelligence, 2003
This paper proposes a new way for authoring multimedia documents. It uses the concept of structur... more This paper proposes a new way for authoring multimedia documents. It uses the concept of structured media that allows to deeper access into media objects. An experiment of structuring video in our authoring and presentation environment for multimedia documents is described. It allows the author to interactively specify various audiovisual structures. A video description and structuration model is used for the composition of video elements (character, shot, scene, etc.) with other media objects (text, sound, image, etc). Such a composition allows to easily realize attractive multimedia presentations where media stuffs can be synchronized in rich and various ways (spatio-temporal synchronization, temporal links, etc.).
Fuzzy entropy semi-supervised support vector data description
The 2013 International Joint Conference on Neural Networks (IJCNN), 2013
ABSTRACT Support Vector Data Description (SVDD) is known as one of the best kernel-based methods ... more ABSTRACT Support Vector Data Description (SVDD) is known as one of the best kernel-based methods for one-class classification problems. SVDD requires fully labelled data sets. However, in reality, an abundant amount of data can be easily collected, while the labelling process is often expensive, time-consuming, and error-prone. Therefore, partially labelled data sets are popular and easy to obtain. In this paper, we propose a semi-supervised learning method, Fuzzy Entropy Semi-supervised SVDD (FS3VDD), to extend SVDD to cope with partially labelled data sets. The learning model employs fuzzy membership and fuzzy entropy to help the labelling of the unlabeled data.
Speech enhancement using combination of dereverberation and noise reduction for robust speech recognition
Proceedings of the Second Symposium on Information and Communication Technology - SoICT '11, 2011
Abstract In this paper, we describe a speech enhancement approach for robust speech recognition. ... more Abstract In this paper, we describe a speech enhancement approach for robust speech recognition. This approach consists of two stages to solve both current problems of speech recognition: reverberation and noise. Firstly, speech signal is dereveberated by ...
Speech enhancement using modified IMCRA and OMLSA methods
International Conference on Communications and Electronics 2010, 2010
In this paper we present a speech enhancement method in highly non-stationary noise environments ... more In this paper we present a speech enhancement method in highly non-stationary noise environments based on modified Improved Minimal Controlled Recursive Averaging (IMCRA) method and Optimal Modified Minimum Mean-Square Error Log-Spectral Amplitude (OMLSA) method. The original OMLSA method, the spectral gain function, which minimizes the mean-square error of the log-spectral amplitude, is obtained as a weighted geometric mean of the
Southern Medical Journal, 1997
Mixed Epithelial and Stromal Tumor of the Kidney With Elevated Serum Level of Cancer Antigen 125
Journal of the Formosan Medical Association, 2011
Mixed epithelial and stromal tumor of the kidney is a newly categorized lesion, with few reported... more Mixed epithelial and stromal tumor of the kidney is a newly categorized lesion, with few reported cases. We report a rare case of a 45-year-old woman with a palpable abdominal mass and elevated serum level of serum cancer antigen 125, who was not receiving hormones or contraceptive agents. Abdominal magnetic resonance imaging revealed a large multilocular cystic tumor that arose in the left central kidney. Nephrectomy was performed under the initial impression of cystic renal cell carcinoma; however, a diagnosis of mixed epithelial and stromal tumor was confirmed according to pathological and immunohistochemical findings. Serum level of cancer antigen 125 returned to normal after 1 month postoperatively and no recurrence was found in the following 18 months.
NGF mRNA is expressed by GABAergic but not cholinergic neurons in rat basal forebrain
The Journal of Comparative Neurology, 1995
Nerve growth factor (NGF) supports the survival and biosynthetic activities of basal forebrain ch... more Nerve growth factor (NGF) supports the survival and biosynthetic activities of basal forebrain cholinergic neurons and is expressed by neurons within lateral aspects of this system including the horizontal limb of the diagonal bands and magnocellular preoptic areas. In the present study, colormetric and isotopic in situ hybridization techniques were combined to identify the neurotransmitter phenotype of the NGF-producing cells in these two areas. Adult rat forebrain tissue was processed for the colocalization of mRNA for NGF with mRNA for either choline acetyltransferase, a cholinergic cell marker, or glutamic acid decarboxylase, a GABAergic cell marker. In both regions, many neurons were single-labeled for choline acetyltransferase mRNA, but cells containing both choline acetyltransferase and NGF mRNA were not detected. In these fields, virtually all NGF mRNA-positive neurons contained glutamic acid decarboxylase mRNA. The double-labeled cells comprised a subpopulation of GABAergic neurons; numerous cells labeled with glutamic acid decarboxylase cRNA alone were codistributed with the double-labeled neurons. These data demonstrate that in basal forebrain GABAergic neurons are the principal source of locally produced NGF.
Journal of Comparative Neurology, 1994
Studies of the trophic activities of brain‐derived neurotrophic factor and neurotrophin‐3 indicat... more Studies of the trophic activities of brain‐derived neurotrophic factor and neurotrophin‐3 indicate that both molecules support the survival of a number of different embryonic cell types in culture. We have shown that mRNAs for brain‐derived neurotrophic factor and neurotrophin‐3 are localized to specific ventral mesencephalic regions containing dopaminergic cell bodies, including the substantia nigra and ventral tegmental area. In the present study, in situ hybridization with 35S‐labeled cRNA probes for the neurotrophin mRNAs was combined with neurotoxin lesions or with immunocytochemistry for the catecholamine‐synthesizing enzyme tyrosine hydroxylase to determine whether the dopaminergic neurons, themselves, synthesize the neurotrophins in adult rat midbrain. Following unilateral destruction of the midbrain dopamine cells with 6‐hydroxydopamine, a substantial, but incomplete, depletion of brain‐derived neurotrophic factor and neurotrophin‐3 mRNA‐containing cells was observed in the...
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Papers by Tiến Khánh Trần