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Due to the high variability in tumor morphology and the low signal-to-noise ratio inherent to mammography, manual classification of mammogram yields a significant number of patients being called back, and subsequent large number of biopsies performed to reduce the risk of missing cancer. The convolutional neural network (CNN) is a popular deep-learning construct used in image classification. This...
A 25–28Gb/s full-rate reference-less CDR is presented and designed in a standard 0.13μm SiGe BiCMOS process, which can be applicable to nearly all classical 100G communication protocols by multi-channel configuration. It consists mainly of a full-rate phase frequency detector, a quadrature voltage control oscillator and two voltage to current convertors with loop filters. A dual-loop topology is adopted...
In this paper a 12bit 10GSps current-steering digital-to-analog converter (DAC) in 280GHz fT 0.7um InP HBT technology is presented. The DAC core works in a double-sampling way, which reduces the maximum clock frequency by half. The double-sampling switch is separated to reduce the inter-symbol-interference. An improved current steer switch architecture is adopted to enhance high frequency dynamic...
The reliability aspect study of Modular Multilevel Converter (MMC) is of great interest in industry applications, such as offshore wind. Lifetime prediction of key components is an important tool to design MMC with fulfilled reliability specifications. While many efforts have been made to the lifetime prediction of IGBT modules in renewable energy applications by considering long-term varying operation...
The junction temperature fluctuation of an Insulated Gate Bipolar Transistor (IGBT) is the most important factor of its aging failure, and smoothing the fluctuation is an effective way to improve the life of an IGBT. The existing method of smoothing the fluctuation is not yet ready wide application, and exploring the different approaches to active junction temperature control is a hot topic. This...
Power cycling in semiconductor modules contributes to repetitive thermal-mechanical stresses, which in return accumulate as fatigue on the devices, and challenge the lifetime. Typically, lifetime models are expressed in number-of-cycles, within which the device can operate without failures under predefined conditions. In these lifetime models, thermal stresses (e.g., junction temperature variations)...
This paper proposes a supervisory optimal control structure for the micro-gas-turbine based combined cooling heating and power (MGT-CCHP) system. In the upper layer of the structure, a dynamic optimal reference governor is developed to calculate the optimal operating points according to the given economic performance indexes, and in the lower layer of the structure, model predictive control is utilized...
Nowadays, with the development of navigation and location, many kinds of outdoor locating methods are surveyed and used, such as Global Position System (GPS) and LTE fingerprint-based positioning system. However, as the most compelling focus, the localization accuracies of these systems are limited by the location systems themselves. Therefore, in order to improve the localization accuracy, we should...
The traditional Sobel operator has low edge localization accuracy, poor noise and edge detection continuity. In order to solve these problems, this paper proposes an image fusion algorithm combining fusion improved Sobel operator, Canny operator and LoG operator to optimize edge detection results. First, we use the Morphological smoothing to preprocess the image of the cigarette packet, and keep the...
In order to reduce high frequency electromagnetic interference (EMI) noise for SiC devices, this paper presents a hybrid structure SiC power module with low parasitic inductance and low ground capacitance that can suppress EMI efficiently. To certify the improvement on EMI, two buck converters, using the same power loop and gate drive, are built for experiment. Two converters use the proposed power...
In the paper, we consider the dynamic, elastic and flexible task scheduling problem in hybrid clouds. Tasks are linearly dependent, compute-intensive, stochastic, deadline-constrained and executed on elastic and distributed cloud resources. The objective is to finish all jobs before their deadlines with renting virtual machines as less as possible. Firstly, we propose two simple and fast dispatching...
A novel switching power loss estimation method for modular multilevel converters (MMCs) with the nearest level modulation (NLM) is introduced in this paper. It focuses on the switching actions caused only by change of the inserted submodule (SM) number per arm, named as the essential switching transitions. Every essential switching action can be identified under the assumption of ideal sinusoidal...
Recently, the performance evaluation of V2X(Vehicle to Vehicle, Infrastructure, Pedestrian and so on, or namely Vehicle to Everything) Communication System becomes more and more imperative because of the rapid development and urgently-needed deployment of Intelligent Transportation System. 802.11p and LTE-V are the main communication technologies which would be used in V2X system. Performance evaluation...
This paper studies the minimum control node set (MCNS) which can make a unified controllability of Energy Internet (EI) considering electrical, natural gas, and district heating networks all together. The important reasons of such a view are the increasing energy types and scales which make control difficulties and costs higher. Note that the maximum matching algorithm treats the nodes in the network...
This paper presents a densely packed MIMO antenna array with high isolation. A compact resonator as a band-gap filter is designed between the two patch antennas to enhance the isolation. Thanks to this compact resonator, the isolation between two patches can reach 30dB, nearly 20dB higher than the MIMO antenna array without using decoupling network. Furthermore, he bandwidth and radiation pattern...
Security attacks on medical devices have been shown to have potential safety concerns. Because of this, stakeholders (device makers, regulators, users, etc.) have increasing interest in enhancing security in medical devices. An effective means to approach this objective is to integrate systematic security requirements elicitation and analysis into the design and evaluation of medical device software...
This paper presents a traffic signal scheduling strategy with consideration of both pedestrians and vehicles in the urban traffic system. Firstly, a novel mathematical model consisting of several logic constraints is proposed to describe the pedestrian flow in the urban traffic network and its dynamics are developed based on the crossing rules. Secondly, a mathematical model about the vehicle traffic...
An urban traffic system is a heterogeneous system, which consists of different types of intersections and dynamics. In this paper, we focus on one type of heterogeneous traffic network, which consists of signalized intersections and non-signalized ones, where in the latter case vehicles usually follow the first-come-first-serve (FCFS) principle. We propose a novel model describing the dynamic behaviors...
In order to meet the wide-range load tracking requirement and overcome unknown disturbance issues of ultra-supercritical (USC) boiler-turbine unit, an extended state observer based fuzzy model predictive controller is proposed using the techniques of fuzzy scheduling, model predictive control and extended state observer. Local state-space models are established on the basis of nonlinearity analysis...
The short-time high capacity reactive power output and quick dynamic response performance are two key performances of new large synchronous condenser. In this paper, the effect of load condition on transient response capability of synchronous condenser by finite element analysis (FEa) model. A 300/-150Mvar prototype synchronous condenser is provided for modeling analysis at a group of different steady...
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