The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
An AUV can be utilized to harvest data from sensor nodes on the seafloor by an optical link. This paper addresses issues that related the vehicle motion to the optical communication quality between the vehicle and the sensor node. Channel characterization of the optical communications is simulated by a Monte Carlo method. The Henyey-Greenstein model is used to compute the distribution of scattering...
Recent years have seen rapid growth in data-driven distributed systems such as Hadoop MapReduce, Spark, and Dryad. However, the counterparts for high-performance or compute-intensive applications including large-scale optimizations, modeling, and simulations are still nascent. In this paper, we introduce DtCraft, a modern C+,+,17-based distributed execution engine that efficiently supports a new powerful...
We report on the development of a tunable microresonator-based sub-kHz extended cavity diode laser (ECDL) for frequency stabilization to an ultrastable high finesse super-cavity. The relative spectral linewidth after the stabilization is ∼ 1 Hz limited by the super-cavity.
Enabled by atomically thickness control (0.26 nm/min) and loss engineering (0.28 dB/cm/min) of graphene oxide (GO) integrated silicon waveguide via ozone treatment, a low-loss (∼5dB/cm) and narrowband (1.1-nm) GO/silicon hybrid waveguide Bragg reflector is demonstrated.
We study experimentally and theoretically the use of photonic crystal nano-cavity to generate a broad range of waveforms, mediating by Drude electron-hole plasma in silicon, and coming from the dynamical states at varying operating conditions.
We report efficient on-chip Turing pattern formation, uniquely enabled by mode-hybridization induced phase matching. Destabilization of Turing pattern is circumvented, thereby achieving unprecedented pump depletion and record high external pump-to-comb conversion efficiency of 45%.
A guided-mode-resonance filter based on continuously-chirped gratings is realized by a modified Lloyd's mirror interferometer to provide a sharp transmission dip at the resonant wavelength that can be gradually swept across the visible spectral region.
We report chip-scale Turing frequency comb with narrow linewidth of 9 kHz and long term stability of 160 kHz on THz carriers. The Turing comb is transferred onto a plasmonic photomixer, achieving 600 μW terahertz radiation with high 1.1% optical-to-terahertz power conversion at room temperature.
This study is to optimize the cell voltage and arm current in double-star modular multilevel converters (DSMMCs) based on Lagrange multiplier of energy cost function and arm current tracking control law. DSMMCs have been widely applied to high-voltage grid power injection, direct-current transmission, back-to-back power transfer, and energy storage systems. The size of capacitors and the rating of...
We analyze the noise characteristics and system performance for image sensor communication with mixed signal dependent Gaussian noise. Moreover, the channel capacity is achievable by a discrete input distribution of finite number of probability mass points.
We demonstrate a new type of microresonator frequency comb where the momentum conservation law is fulfilled by azimuthal modulation of the waveguide dispersion, mathematically equivalent to the formation of Faraday instability. The concept expands the parametric range in which a microresonator frequency comb is obtained.
To successfully increase athletes' or exercisers' fitness and endurance, the factors of physiological signal, emotion, or the level of fatigue should be considered during the training program. Many clinical decision support systems can assist to monitor the exercisers by some wearable devices. And, the questionnaire should also be taken into account to produce a report. Such process is cumbersome,...
Malware is a widespread problem and despite the common use of anti-virus software, the diversity of malware is still increasing. A major challenge facing the anti-virus industry is how to effectively detect thousands of malware samples that are received every day. In this paper, a novel approach based Run Length Encoding (RLE) algorithm and n-gram are proposed to improve malware detect on dynamic...
The integrated starter generator (ISG) is one of the key components of hybrid electric vehicles. However, with the significant difference in power range between the two operation modes of the starter and generator, it is difficult for the generator to exhibit excellent behaviors in both modes. To solve this problem, a dual air-gap permanent magnet ISG is investigated in this paper. Torque characteristics...
To develop key design metrics for guidance control system of air to surface SAR missile, the relationship between guidance control parameters and measuring errors is analyzed. According to the non-linear model between guidance control parameters and measured motion parameters in the algorithm of optimal guidance law, linearization method is employed to build the relationship expression between guidance...
Unparalleled growth in the sharing of media via networks has prompted a great deal of research into issues pertaining to image retrieval. The training and verification of image retrieval systems requires a large number of labelled images with ground truth; however, most researchers employ synthetic datasets for their experiments. In this study, we developed a system based on a mobile phone App for...
The rising of social media services causes Sentiment Analysis is becoming a critical research issue in recent years. Using the prediction of future opinion trends to adjust current business strategies is the most valuable application of emotion discovery. The major drawback of the previously proposed language model, CCLM, used to produce a larger number of terms in corpus causes the emotion classifier...
In this paper, a review of microwatt low-noise amplifier (LNA) is presented. To achieve gain improvement and noise figure reduction simultaneously, a gain-boosting technique using transformer feedback is adopted in this LNA design. By employing current-reused, and forward-body-bias techniques, LNA can operate at a reduced supply voltage with micro-watt dc power consumption while maintaining good gain...
This study explores the spatial-temporal patterns of particulate matter (PM) in Taiwan. Probability map of PM and daily patterns are discussed in this study. Data mining provides more detailed spatial-temporal information for PM variations and trends. The proposed model will show that data mining provides a relatively high goodness of fit and sufficient space-time explanatory power, particularly air...
Being an advanced application of SEM based Nanoprobing tool, Electron Beam Current (EBC) is commonly applied for detecting test-key failure or LBIST scan failure. In this paper, EBC is employed with TIVA (Thermal Induced Voltage Alteration) to diagnose the chip level Pin high resistance failure related issue.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.