1,721,733 research outputs found
IULA Spanish LSP Treebank
No full textThis treebank consists of a number of sentences syntactically analyzed. The sentences have been choosed from the IULA LSP corpus, automatically annotated with POS information and manually annotated with syntactical information using the DELPH-IN environment. The resulting syntactic analysis is automatically converted to dependencies and delivered using the CONLL format
Tibidabo Treebank and IULA Spanish LSP Treebank Train and Test Partitions
No full textThis package contains a partition of the Iula Spanish LSP Treebank into train and test sets to perform Machine Learning experiments. In that way the same partitions can be used by different researchers and their results can be directly compared./n/nIn this package we also deliver the Tibidabo Treebank (Marimon 2010) which /ncontains a set of sentences extracted from Ancora corpus annotated in the /nsame way than the Iula Treebank. Tibidabo Treebank is a very good test set /nfor models trained with Iula Spanish LSP Treebank since the sentences that /nform it from a very different domain than those of the Iula Spanish LSP /nTreebank
10 anys del Corpus de l'IULA
No full textEn aquest paper, es presenten els criteris de treball que s'han seguit durant els 10 anys en què s'ha anat constituint el corpus de l'IULA. S'exposa l'estat de les dades del corpus, els recursos lèxics utilitzats per al tractament de les dades (diccionaris i etiquetaris) i les eines constituïdes o adaptades. Es dedica especial atenció a la documentació de la cadena de treball de processament del corpus, des de l'adquisició dels textos en format electrònic fins a la seva incorporació definitiva al corpus
IULA Penn Treebank
No full textThis treebank consists of a number of Spanish and English sentences that has been manually annotated with syntactical information. The sentences have been choosed from the Penn TreeBank corpus, a resource containing texts from Wall Street Journal and originally compiled by the University of Pennsylvania./nIt contains 805 sentences that have been human translated to Spanish. The original English and the translated Spanish sentences share the same identification number. Sentences in both languages have been processed using the DELPH-IN environment (http://www.delph-in.net/)
IULA Spanish-English Technical Corpus
No full textThe corpus consists of a number of specialized texts (Law, Economics, Medicine, Environment and Computer Science domains) available in both Spanish and English languages. This LSP corpus has been compiled with articles from specialized Publications, PhD theses, etc./nIt contains about a total of about 2,1 M words in 127 documents in each language
Optimization and evaluation of a biometric recognition technique based on 3D Ultrasound Palm Vein
No full textBiometric systems based on ultrasound images are becoming more and more common and are exploiting different characteristics like fingerprint, palmprint, hand geometry and palm vein patterns. In this work, a previously proposed method for extracting 3D palm vein patterns from volumetric ultrasound images has been optimized and experimentally evaluated by using a home-made database composed on 55 volumetric images captured from 23 different volunteers. If compared with recent works, recognition results seems encouraging. Further possible improvements of the proposed technique are finally discussed
Ultrasound Systems for Biometric Recognition
No full textBiometric recognition systems are finding applications in more and more civilian fields because they proved to be reliable and accurate. Among the other technologies, ultrasound has the main merit of acquiring 3D images, which allows it to provide more distinctive features and gives it a high resistance to spoof attacks. This work reviews main research activities devoted to the study and development of ultrasound sensors and systems for biometric recognition purposes. Several transducer technologies and different ultrasound techniques have been experimented on for imaging biometric characteristics like fingerprints, hand vein pattern, palmprint, and hand geometry. In the paper, basic concepts on ultrasound imaging techniques and technologies are briefly recalled and, subsequently, research studies are classified according to the kind of technique used for collecting the ultrasound image. Overall, the overview demonstrates that ultrasound may compete with other technologies in the expanding market of biometrics, as the different commercial fingerprint sensors integrated in portable electronic devices like smartphones or tablets demonstrate
Aspect ratio optimization of piezoceramic disks for maximizing electromechanical energy conversion in energy harvesting applications
No full textA wide variety of devices based on piezoceramic elements, vibrating in several modes, have been proposed and developed for energy harvesting applications. The evaluation of the capability of converting mechanical energy into electric energy is a main issue in the device design. In this work, the dependence of the piezoceramic element performances on the aspect ratio, i.e., the ratio between thickness and diameter, is analyzed with the aim of maximizing the energy conversion. To the end, the effective electromechanic coupling factor (keff), which is a parameter that can be easily measured, is the investigated parameter. Results obtained with analytical and FE models have shown that the higher keff value is obtained when the thickness and the diameter of the piezoceramic element are comparable. A first experimental validation of simulation results is finally provided
Tibidabo Treebank and IULA Spanish LSP Treebank Train and Test Partitions
No full textThis package contains a partition of the Iula Spanish LSP Treebank into train and test sets to perform Machine Learning experiments. In that way the same partitions can be used by different researchers and their results can be directly compared. In this package we also deliver the Tibidabo Treebank (Marimon 2010) which contains a set of sentences extracted from Ancora corpus annotated in the same way than the Iula Treebank. Tibidabo Treebank is a very good test set for models trained with Iula Spanish LSP Treebank since the sentences that form it from a very different domain than those of the Iula Spanish LSP Treebank
A high-power traveling wave ultrasonic motor
No full textIn the present work, a traveling wave ultrasonic motor (TWUSM) is proposed. It is composed of an annular-shaped stator and two cone-shaped rotors that are pressed in contact to the borders of the inner surface of the stator. A rotating traveling wave has been generated in the stator by using as vibration generators two bolted Langevin transducers (BLT) opportunely shifted in space and in time. The vibrational behavior of the stator as well as the traveling wave generation has been simulated with the finite-element method (FEM) software. A prototype of the motor has been manufactured and experimentally characterized. It exhibits a static torque of about 0.8 N-m and a maximum angular speed of about 300 rpm. Possible variations of the present design aimed to increase output torque or minimize encumbrance are described and discussed
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