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This paper reports a 3.0 THz detector which can detect the terahertz wave radiated by a quantum cascade laser (QCL) working at pulse mode. The detector was implemented in a 65 nm silicon CMOS process. The chip size is 1.5×l.5 mm2 including bonding pads. THz detector using FET is based on plasma wave theory proposed by Dyakonov and Shur which allows detection of THz radiations far beyond the FET devices...
In this paper, we propose a work flow for processing and analysing large-scale tracking data with spatio-temporal marks that uses an infrastructure for machine learning methods based on a meta-data representation of point patterns. The tracking log (IP address) of cyber security devices usually maps to geolocation and timestamp, such data is called spatiotemporal data. Existing spatio-temporal analysis...
Along with our country the implementation of the strategy of developing the new energy, solar energy is a kind of ideal clean energy future energy, with the power grid operation requirements of photovoltaic power generation system is increasing day by day, for the needs of the operation and control, is necessary for photovoltaic system monitoring, photovoltaic power plant key components of condition...
Here, an approach for synthesizing large-area and high-quality MoS2 flakes was developed. In addition, we made up the MoS2 photoelectric detector and studied the photocurrent response of the detector. We firstly used the ceramic pieces to control MoO3 evaporation for obtaining large-area MoS2. Our CVD reaction is hydrogen free, very simple operation, high repetition rate and cost saving. The obtained...
It is expected that there are a variety of energy resources to be jointly operated by the power system in the future. Through jointly operating all types of energy resources via the Internet, Energy Internet is a promising solution to increase energy efficiency. However, the increasing integration of energy resources inevitably imposes challenges in secure communication in the Energy Internet. Resourceful...
In this paper a high order temperature compensation current reference circuit was proposed, which is accomplished by two current source with opposite temperature coefficients (TC) to obtain a smaller TC. The proposed circuit with a simple structure designed in Global Foundries 0.18μm CMOS process, achieving a temperature coefficient of 30.7ppm/°C in the range of −50∼120°C, and the quiescent current...
A novel current mirror sensing based multi-phase current balance developed in Global Foundry 0.18μm CMOS process was presented in this paper. Different from conventional current mirror sensing method, a new bypass branch was added to make the sample signal more accurate in high switching frequency situation. The method was realized in a 2.5MHz four-phase buck converter. As the simulation result shows,...
Due to the iteration-varying initial position, it is complicated in path-tracking for the mobile service robot. Perspective dynamic system (PDS) provides a theory to formulate the system, which transmits from the apparent motion to the image plane and provides a good control theoretic framework to estimate motion problem. The proposed iterative learning control (ILC) algorithms not only consider errors...
The transition towards a cyber-physical energy system (CPES) entails an increased dependency on valid data. Simultaneously, an increasing implementation of renewable generation leads to possible control actions at individual distributed energy resources (DERs). A state estimation covering the whole system, including individual DER, is time consuming and numerically challenging. This paper presents...
To meet the demands of modern mobile devices on higher current and longer standby time, a novel high driving capability multi-phase interleaved buck converter with low standby power consumption is proposed. By transferring the control scheme from adaptive-on-time (AOT) mode to pulse-frequency-modulation (PFM) mode, the efficiency at light load could be improved. Phases can automatically shed to minimize...
The Traction Control System is the foundation to maintain the vehicle tractive performance and stability. In view of the characteristics of distributed driving electric vehicle, a traction control method is designed to control the wheel slip rate by adjusting the motor torque directly. And through reasonable correction to the target wheel speed, a balance of acceleration and stability of automobile...
This paper presents a mathematical model to predict the half-hourly load in one year based on solar energy index, holiday index and weather index. The weather index and the holiday index are taken as the eigenvalues of the Support Vector Machine (SVM), Elman neural network (Elman), and BP artificial neural network (BP neural network), and then the final optimal model is selected through a comparison...
Shanghai Astronomical Observatory is developing space mini passive hydrogen maser for future application in satellite navigation system. Study on key technologies, including miniatured cavity-bulb assembly, absorption pump and magnetic state selection system, have been carried out. Weight of physical package is controlled within 10kg and atomic signal is up to 2dB. Miniatured electronic package weight...
Building an accurate model to describe supercapacitor's dynamic characteristics is the basis for energy management strategy and system simulation analysis. This paper presents the support vector machine regression (SVMR) based modeling approach which can describe the supercapacitor's nonlinear property and dynamic characteristics during the process of charging and discharging. The concrete modeling...
Effect of nitrogen annealing on SiC/SiO2 interface properties was comparatively investigated for SiC MOS capacitors. Interface properties were characterized by normalized parallel conductance and interface state density value, and dielectric strength was evaluated by the electric-field-to-breakdown (Ebd). The results exhibited that both fast and slow states were present at the nitrogen-annealed samples'...
Ti/Al contacts deposited on p-type epilayer doped with Al at 2×1019 cm−3 are reported. The current-voltage curves of Ti/Al contacts annealed at different temperatures from 800 to 1000 °C were measured, which provided the specific contact resistances (SCRs) of 6.59×10−5 Ω/cm2 and 7.81×10−5Ω/cm2 after annealing at 900°C for 5min and 950°C for 2min, respectively. The microstructures of Ti/Al contact...
In order to improve the drying quality and reduce the energy consumption of the black agarics, the application of infrared heating technology and the convection of hot air drying technology combination in the drying process, the weigh of black agarics recorded by the first and the second weighing system and the data were compared with the final moisture drying required. In order to improve the drying...
High energy consumption limits low — temperature plasma application in terms of waste gas treatment. In order to further improve the efficiency of handling waste gas by using gliding arc plasma, it is put forward that gliding arc plasma is cooperated with photocatalyst to deal with exhaust gas. In this paper, sulfur dioxide was acted as target gas to be dealt with. The molecular sieve loading TiO2...
Link prediction is to calculate the probability of a potential link between a pair of unlinked nodes in the future. It has significance value in both theoretical and practical. The similarity of two nodes in the networks is an essential factor to determine the probability of a potential link between them. One of the important methods with the similarity of two nodes is to consider common neighbors...
Characteristic modes (CMs) provide physical insights for antenna design but it is computationally intensive. In this contribution, an interpolation scheme is proposed for frequency sweep of CMs for the first time. Orthogonality of the eigeicurrents is checked using interpolated impedance matrix. Two numerical examples are provided for verification.
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