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This paper presents a power-efficient single-loop continuous-time (CT) third-order sigma delta (ΔΣ) modulator that achieves a SNDR of 79.6 dB over a 10 MHz signal bandwidth. The modulator uses a feedforward-feedback (CIFF-FB) architecture which incorporates a single amplifier biquad (SAB) and a passive integrator to realize a third-order noise shaping. We also propose a continuous-time complementary...
Since their introduction over a decade ago, time series motifs have become a fundamental tool for time series analytics, finding diverse uses in dozens of domains. In this work we introduce Time Series Chains, which are related to, but distinct from, time series motifs. Informally, time series chains are a temporally ordered set of subsequence patterns, such that each pattern is similar to the pattern...
Psoriasis is a chronic, recurrent, inflammatory skin disease, with varied incidence rates for various populations in different regions of the world. According to statistics, the prevalence of psoriasis in European countries is about 1% ∼ 3%, and 0.47% for China in 2008, which appears on the rise year by year. [1,2] Evidence suggests that genetic and environmental factors play important roles in the...
Image-to-image translation is a class of vision and graphics problems where the goal is to learn the mapping between an input image and an output image using a training set of aligned image pairs. However, for many tasks, paired training data will not be available. We present an approach for learning to translate an image from a source domain X to a target domain Y in the absence of paired examples...
This paper presents a calibration technique based on missing-code-detection (MCD) scheme to correct the gain error between the MSB and the LSB array in SAR ADCs with bridge-DAC structure. The MCD algorithm replaces the gain factor calculation with simple missing-codes count that significantly reduces the calibration digital overhead. It also relieves the linearity requirement of the testing signal;...
This paper describes the soft start and grid connection control strategies for high power synchronous compensator fed by low-voltage load-commutated inverters (LCI). In the start-up stage, field weakening method is used to make the motor start stably, and the back electromotive force (EMF) basically remain stable within the LCI withstand voltage at the same time. When the motor speed up to above the...
This paper studies diffraction of a plane electromagnetic wave by a uniformly moving, anisotropic impedance wedge and presents an exact solution in closed form to a class of impedance wedges based on frame hopping [1] and earlier results for diffraction by such obstacles at rest [2, 3].
Common visual recognition tasks such as classification, object detection, and semantic segmentation are rapidly reaching maturity, and given the recent rate of progress, it is not unreasonable to conjecture that techniques for many of these problems will approach human levels of performance in the next few years. In this paper we look to the future: what is the next frontier in visual recognition?...
We investigate conditional adversarial networks as a general-purpose solution to image-to-image translation problems. These networks not only learn the mapping from input image to output image, but also learn a loss function to train this mapping. This makes it possible to apply the same generic approach to problems that traditionally would require very different loss formulations. We demonstrate...
Wireless communication systems and Ethernet networks call for moderate-resolution GS/s energy-efficient ADCs. While previous work [1] shows that the multi-bit per cycle SAR ADC can achieve low power due to various hardware reduction techniques, there are still a few limitations that restrain this architecture. First, the pre-charge slows down the logic and the DAC settling, especially during the MSB...
This paper proposes dual recommendation strategies, namely changing from "learners search for resources" to "system recommend automatically" and "learners search for resources". Taking the AEHS model as reference, the design of architecture of user model, pedagogical model (knowledge model) and adaptive engine are proposed. JAVA+SQLServer technology and ontology technology...
Recently, cardiovascular disease has become the first cause of death for human health. Because of the complex etiology and long duration, the readmission rate for patients is extremely high during therapy, consuming a large amount of medical resources as well as producing expensive hospitalization costs. In order to solve this problem, this paper summarizes the current situation and problems of risk...
The all-pairs-similarity-search (or similarity join) problem has been extensively studied for text and a handful of other datatypes. However, surprisingly little progress has been made on similarity joins for time series subsequences. The lack of progress probably stems from the daunting nature of the problem. For even modest sized datasets the obvious nested-loop algorithm can take months, and the...
As social media has become increasingly popular in the modern world, people are using these platforms to express their opinions about products, businesses, and services. The need for categorizing these consumer reviews has been prominent. One effective solution is sentiment analysis (SA), which has been an active research topic. The goal of SA is to automatically extracting and classifying user opinions...
Time series motifs have been in the literature for about fifteen years, but have only recently begun to receive significant attention in the research community. This is perhaps due to the growing realization that they implicitly offer solutions to a host of time series problems, including rule discovery, anomaly detection, density estimation, semantic segmentation, etc. Recent work has improved the...
This paper presents a calibration scheme for reference error caused by signal dependent switching transient in a high speed SAR ADC. The scheme has a little hardware overhead, which is not dependent on the type of the input signal and is able to run in the background without interrupting the ADC's normal operation. The calibration along with the SAR ADC are implemented in a 65 nm CMOS and the measurement...
This paper presents a 10-bit 1GS/s 4-way time-interleaved (TI) successive approximation register (SAR) analog-to-digital converter (ADC). To reduce the time skew among the TI channels, the master clock based sampling technique is adopted that can effectively suppress the interleaving spurs to −54dB at Nyquist input. Morever, a tap-interpolating fractional delay (TIFD) filters based time skew calibration...
Usually, semi-supervised learning requires a number of prior knowledge to supervise the learning process, such as, seeds in Seeded-Kmeans, pair-wise constraints in COP-Kmeans, and labeled data for training an initial useful classifier in S3VM. Such prior knowledge is generally provided by the domain expert, so it is very expensive. In this paper, we propose a new automatical document labeling strategy...
Active attacks threat the security of communication dramatically. In this paper, we propose a secure transmission scheme based on random orthogonal pilots to detect the presence of active eavesdropping attacks on channel estimation in time-division-duplex (TDD) systems. The scheme only needs to replace some regular pilot sequences with random orthogonal pilot sequences occasionally without any prior...
This paper presents a 12b 180 MS/s partial-interleaving Pipelined-SAR analog-to-digital converter (ADC). The 1st-stage is implemented with a 2b/cycle SAR ADC for high speed, where we propose a merged-residue-DAC technique to improve the noise performance. The capacitor pre-charging in conventional 2b/cycle operation wastes settling time and switching energy, while with this design approach the switching...
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