المؤلفون: Ma, Lingyu, Reisert, Marco, Burkhardt, Hans

المصدر: IEEE/ACM Transactions on Computational Biology and Bioinformatics IEEE/ACM Trans. Comput. Biol. and Bioinf. Computational Biology and Bioinformatics, IEEE/ACM Transactions on. 9(1):228-239 Jan, 2012

المؤلفون: Mahantesh P Mattada, Hansraj Guhilot

المصدر: Journal of King Saud University - Engineering Sciences. 34:418-424

مصطلحات موضوعية: Environmental Engineering, Computer science, 020209 energy, General Chemical Engineering, 0211 other engineering and technologies, 02 engineering and technology, Network topology, Catalysis, Time-to-digital converter, Least significant bit, 021105 building & construction, Hardware_INTEGRATEDCIRCUITS, 0202 electrical engineering, electronic engineering, information engineering, Hardware_ARITHMETICANDLOGICSTRUCTURES, Electrical and Electronic Engineering, Field-programmable gate array, Hardware_REGISTER-TRANSFER-LEVELIMPLEMENTATION, Civil and Structural Engineering, Virtex, business.industry, Mechanical Engineering, Resolution (electron density), General Engineering, Phase-locked loop, Clock time, business, Computer hardware

الوصف: A 13-bit Time to Digital Converter is implemented using multiphase clock technique. Xilinx’s Virtex 5 FPGA platform is used to realize the TDC architecture. One PLL within the FPGA works as a clock synthesizer to multiply the reference clock to 500 MHz. Then the combination of PLL and DLL topologies are used to generate 16 phases of the clock, separated by 11.25°. Further, 16 phases are generated by inverting the first 16 phases. A resolution of 62.5 ps has been recorded. Measured INL and DNL are within 1 LSB. The present work is suitable for many critical applications due to its PVT insensitive and robust properties.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::3f87251b58f565ccff310ca4bd55c69d
https://doi.org/10.1016/j.jksues.2021.01.007

المؤلفون: Mingfang Li, Yidong Tan, Zongren Dai, Yifan Wang, Xin Xu

المصدر: IEEE Transactions on Industrial Electronics. 69:9605-9612

مصطلحات موضوعية: Computer science, Acoustics, Resolution (electron density), Process (computing), FOS: Physical sciences, Linearity, Physics - Applied Physics, Applied Physics (physics.app-ph), Tracing, Laser, law.invention, Interferometry, law, Control and Systems Engineering, Sensitivity (control systems), Electrical and Electronic Engineering, Rotation (mathematics), Physics - Optics, Optics (physics.optics)

الوصف: In this paper, a novel optical rotary sensor based on laser self-mixing interferometry is developed for the full-circle rotation measurement. The proposed sensor is convenient to use for it does not need any contact with the target or a cooperative mirror. A prototype is fabricated and tested. The measured results demonstrate a good performance compared with other optical rotary sensors, in terms of the 0.1 μrad resolution, the 2.33×10-4 linearity and 2 μrad stability over one hour. Additionally, the repeatability error is below 14.66 mrad under 9-group full-circle tests, which exhibits the potential to be instrumentalized reliably. Error analysis and limitation discussion have been also carried out. Although the accuracy needs further improvement compared with the best rotary sensor, this method has its unique advantages of high resolution, non-cooperative target sensing and electromagnetic immunity. Hence, the proposed optical rotary sensor provides a promising alternative in precise rotation measurement, tremor tracing and nano-motion monitoring.In this paper, a novel optical rotary sensor based on laser self-mixing interferometry is developed for the full-circle rotation measurement. The proposed sensor is convenient to use for it does not need any contact with the target or a cooperative mirror. A prototype is fabricated and tested. The measured results demonstrate a good performance compared with other optical rotary sensors, in terms of the 0.1 μrad resolution, the 2.33×10-4 linearity and 2 μrad stability over one hour. Additionally, the repeatability error is below 14.66 mrad under 9-group full-circle tests, which exhibits the potential to be instrumentalized reliably. Error analysis and limitation discussion have been also carried out. Although the accuracy needs further improvement compared with the best rotary sensor, this method has its unique advantages of high resolution, non-cooperative target sensing and electromagnetic immunity. Hence, the proposed optical rotary sensor provides a promising alternative in precise rotation measurement, tremor tracing and nano-motion monitoring.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95fa3e43792f76548f26026594483a4d
https://doi.org/10.1109/tie.2021.3114705

المؤلفون: Dinesh Bhatia, Poras T. Balsara, Sameer Arora

المصدر: IEEE Journal of Emerging and Selected Topics in Power Electronics. 10:4231-4244

مصطلحات موضوعية: Direct digital synthesizer, Computer science, Resolution (electron density), Switching frequency, Electronic engineering, Energy Engineering and Power Technology, Frequency-hopping spread spectrum, Power semiconductor device, Electrical and Electronic Engineering, Converters, Pulse-width modulation, Power (physics)

الوصف: Wide band-gap semiconductor power devices are being adopted to increase efficiency and switching frequency for power converters. This requires a demand for higher resolution Digital Pulse Width Modulation (DPWM) in digitally controlled power converters. This is because, in a digitally controlled DC-DC converter, steady-state limit-cycle oscillations can exist if the resolution of DPWM is less than the ADC resolution. This paper proposes a cost-competitive, high-performance, functionally-integrated with a small package-sized, a complete Direct Digital Synthesis-based DPWM architecture to achieve a high resolution, linear, monotonic behavior, and extremely fast frequency hopping ability. The paper presents a detailed analysis of the new DPWM architecture. Simulation and experimental results are presented verifying the analysis. The paper also discusses the various advantages and numerous applications addressed by the proposed method.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::4ba4de0e2a69f25302310fc57b08bb93
https://doi.org/10.1109/jestpe.2021.3057065

المؤلفون: Tadashi Orita, Shin'ichiro Takeda, Pietro Caradonna, Shin Watanabe, Tadayuki Takahashi, Goro Yabu, Fumiki Moriyama, Hiroki Yoneda

المصدر: IEEE Transactions on Radiation and Plasma Medical Sciences. 6:592-600

مصطلحات موضوعية: Physics, Range (particle radiation), Tomographic reconstruction, business.industry, Detector, Resolution (electron density), Atomic and Molecular Physics, and Optics, Cadmium telluride photovoltaics, Full width at half maximum, Optics, Radiology, Nuclear Medicine and imaging, business, Instrumentation, Image resolution, Energy (signal processing)

الوصف: Tomographic imaging with radionuclides commonly used in nuclear medicine, such as $^{111}$In (171 and 245 keV) and $^{131}$I (364 keV), is in high demand for medical applications and small animal imaging. The Si/CdTe Compton camera with its high angular and high energy resolutions is an especially promising detector to extend the energy coverage for imaging to the range that covers gamma-ray emitted from these radionuclides. Here, we take the first steps towards short-distance imaging by conducting experiments using three-dimensional phantoms composed of multiple sphere-like solutions of $^{111}$In and $^{131}$I with a diameter of 2.7 mm, placed at a distance of 41 mm. Using simple back-projection methods, the positions of the sources are reproduced with a spatial resolution of 11.5 mm and 9.0 mm (FWHM) for $^{111}$In and $^{131}$I, respectively. We found that a LM-MLEM method gives a better resolution of 4.0 mm and 2.7 mm (FWHM). We resolve source positions of a tetrahedron structure with a source-to-source separation of 28 mm. These findings demonstrate that Compton Cameras have the potential of close-distance imaging of radioisotopes distributions in the energy range below 400 keV.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::ef1b9fd676c19b6a33e359de35d2e46d
https://doi.org/10.1109/trpms.2021.3104665

المؤلفون: Jae-Yoon Sim, Hwan-Seok Ku, Seungnam Choi

المصدر: IEEE Transactions on Circuits and Systems II: Express Briefs. 69:789-793

مصطلحات موضوعية: Computer science, Resolution (electron density), Successive approximation ADC, Hardware_PERFORMANCEANDRELIABILITY, law.invention, Capacitor, CMOS, law, Wireless sensor node, Hardware_INTEGRATEDCIRCUITS, Electronic engineering, Shaping, Electrical and Electronic Engineering, Resistor, RC circuit

الوصف: This paper presents a temperature sensor suitable for heavily duty-cycled wireless sensor node. To achieve both a fine resolution and a fast conversion time, the proposed temperature sensor embeds a RC network in a 16-bit residue-integrated successive approximation register (SAR) analog-to-digital conversion (ADC). A poly resistor is connected in series with the capacitor digital-to-analog converter (DAC) to develop a temperature-dependent ADC input. The proposed temperature sensor, implemented in 180nm CMOS, achieves a resolution of 20mK in a range of -30-to-100∘C. It shows a resolution figure-of-merit of 3pJ∙K2 while supporting a burst operation in a conversion time of 12μs after wake-up.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::39cc4b10aacf874326ad095dc883777d
https://doi.org/10.1109/tcsii.2021.3107899

المؤلفون: Drew A. Hall, Haowei Jiang, Corentin Pochet, Aditi Jain

المصدر: IEEE Transactions on Circuits and Systems II: Express Briefs. 69:704-708

مصطلحات موضوعية: Materials science, Wheatstone bridge, business.industry, Resolution (electron density), Electrical engineering, Noise (electronics), law.invention, law, Limit (music), Wireless, Electrical and Electronic Engineering, Resistor, business, Cmos process, Internet of Things

الوصف: This paper reports a high-performance, low-power temperature sensor suitable for wireless IoT devices/RFID tags. The system utilizes a mostly digital approach to achieve energy-efficient, sub-μW operation with a resistor-based temperature sensor. A sampled, incomplete-settling, switched-capacitor-based Wheatstone bridge is read out using a digital frequency-locked loop (DFLL) while harnessing the quasi-periodic limit cycles to reduce in-band noise. Implemented in a 65 nm CMOS process, it consumes 310 nW and achieves 9.8 mK resolution in a 10 ms conversion time. This results in a 297 fJ∙K2 figure-of-merit (FoM) and low energy (3.1 nJ/meas.).

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::2dd59870b9092868914874828996da80
https://doi.org/10.1109/tcsii.2021.3106265

المؤلفون: Franklin Bien, Sangwoong Shin, Seunghun Oh, Sanghyun Heo, Kyeongmin Park

المصدر: IEEE Transactions on Circuits and Systems I: Regular Papers. 69:1135-1147

مصطلحات موضوعية: Physics, Noise, Analog front-end, Capacitive sensing, Acoustics, Fingerprint (computing), Resolution (electron density), Electrical and Electronic Engineering

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::70de7449191d352013c2520ad7ddcb03
https://doi.org/10.1109/tcsi.2021.3127683

المؤلفون: Juan I. Morales, Fernando Chierchie, Eduardo E. Paolini, Pablo S. Mandolesi

المصدر: IEEE Transactions on Circuits and Systems II: Express Briefs. 69:1597-1601

مصطلحات موضوعية: Materials science, CMOS, business.industry, Resolution (electron density), Optoelectronics, Electrical and Electronic Engineering, business, Pulse-width modulation, 18-bit, Power (physics)

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::463e2bf12fd2aabc9c3865adfdfc3aa9
https://doi.org/10.1109/tcsii.2021.3115957

المؤلفون: Susanna Corti, F. Fabiano, Paolo Ghinassi

المصدر: Weather and Climate Dynamics, Vol 3, Pp 209-230 (2022)

مصطلحات موضوعية: Horizontal resolution, General Circulation Model, Climatology, Meteorology. Climatology, Metric (mathematics), Resolution (electron density), Northern Hemisphere, Rossby wave, Transient waves, QC851-999, Spatial distribution, Geology

الوصف: This work aims to assess the performance of state-of-the-art global climate models in representing the upper-tropospheric Rossby wave pattern in the Northern Hemisphere and over the European–Atlantic sector. A diagnostic based on finite-amplitude local wave activity is used as an objective metric to quantify the amplitude of Rossby waves in terms of Rossby wave activity. This diagnostic framework is applied to a set of coupled historical climate simulations at different horizontal resolutions, performed in the framework of the PRIMAVERA project and compared with observations (ERA5 reanalysis). At first, the spatio-temporal characteristics of Rossby wave activity in the Northern Hemisphere are examined in the multimodel mean of the whole PRIMAVERA set. When examining the spatial distribution of transient wave activity, only a minimal improvement is found in the high-resolution ensemble. On the other hand, when examining the temporal variability of wave activity, a higher resolution is beneficial in all models apart from one. In addition, when examining the Rossby wave activity time series, no evident trends are found in the historical simulations (at both standard and high resolutions) and in the observations. Finally, the spatial distribution of Rossby wave activity is investigated in more detail focusing on the European–Atlantic sector, examining the wave activity pattern associated with weather regimes for each model. Results show a marked inter-model variability in representing the correct spatial distribution of Rossby wave activity associated with each regime pattern, and an increased horizontal resolution improves the models' performance only for some of the models and for some of the regimes. A positive impact of an increased horizontal resolution is found only for the models in which both the atmospheric and oceanic resolution is changed, whereas in the models in which only the atmospheric resolution is increased, a worsening model performance is detected.

وصف الملف: application/pdf

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2235b4d8e637ab54138b7269d37db3c2
https://doi.org/10.5194/wcd-3-209-2022