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.
Complex systems are prevalent in many fields such as finance, security and industry. A fundamental problem in system management is to perform diagnosis in case of system failure such that the causal anomalies, i.e., root causes, can be identified for system debugging and repair. Recently, invariant network has proven a powerful tool in characterizing complex system behaviors. In an invariant network,...
In this paper, a non-overlap clock (NVC) generator for high accuracy fully differential Switched Capacitor (SC) readout circuit which is applied in Micro-Electro Mechanical System (MEMS) differential sensor is proposed. Compared with traditional generator, generating a set of non-overlap clock, this circuit generates a new set of clocks which are being nested inside the primary non-overlap clocks,...
This paper considers the relative position control of the Line-of-Sight (LOS) based relative motion model, which is highly complicated and strongly coupling nonlinear with the matched disturbance. By employing a novel nonsingular fast terminal sliding mode (NFTSM) surface, the adaptive control law is designed to guarantee the bounded stability of the closed-loop error system without prior knowledge...
In order to solve the problem that the existing parallel manipulator is expensive, complicated design and complicated control, this paper designs a three-degree-of-freedom parallel manipulator with cam-driven single power input. The manipulator is cheap and widely used. And then its kinematics research. The freedom degree analysis of the manipulator is completed, and the kinematics is obtained. And...
In industrial control, there are a large number of nonlinear strongly coupled controlled objects with external disturbance. It is difficult to control the object of such a good effect with classical control theory. Aiming at the problem of disturbance rejection, decoupling and tracking control of this kind of system, PIDNN controller is adopted in this paper, and its weight correction algorithm is...
Loop closure detection is important in simultaneous localization and mapping (SLAM) systems. In this paper, Generative Adversarial Networks (GAN), an unsupervised deep architecture is employed to detect the loop closure for vision-based SLAM systems. Instead of extracting handcrafted features like SIFT, SURF or ORB. Generative Adversarial Networks are based on image features. Similar to the task about...
An equivalent circuit model for a multiple resonance reflectarray element is presents in this study. It allows predicting the broadband characteristics of the element from only a few full wave simulations. The equivalent circuit approach can provide good insight into the physical and design properties of periodic structure.
A probe-fed stacked U-slot patch antenna for satellite applications is presented. The impedance bandwidth (VSWR≤1.5) of 7.7% is achieved at the designed frequency fo. The simulated peak realized gain of the proposed antenna is about 9 dBi.
Piezoelectric ceramics(PZT)actuator has been widely used in flexure-guided nanopositioning stage because of their high resolution. However, it is quite hard to achieve high-rate precision positioning control because of the complex hysteresis nonlinearity effect of PZT actuator. Thus, an online RELM algorithm with forgetting property(FReOS-ELM) is proposed to handle this issue. Firstly, we adopt regularized...
By the rapid development of EV industry, electric safety accidents occurred sometimes, charging equipment and power battery are two main aspects. At present, the assessment of electrical safety is still in the level to meet the relevant standards and lack of complete assessment method. In this paper, according to the electric safety protection of electric vehicle charging equipment, a new method based...
With the rapid increase in the number of electric vehicles, V2G model has been widely concerned. In this paper, the three-level LLC resonant DC/DC converter applied to V2G is chosen as the research object. The charging process of the circuit is introduced from the basic principle of the circuit. Afterwards, MATLAB/Simulink is used to simulate and analyze the bifurcation phenomenon. Finally, it controls...
Super-capacitor with the features of high power density and long life is used as a new kind of energy storage methods for electric bus. State of charge (SOC) indicates the remaining power, which is very important for super-capacitor bus. In this paper, a SOC estimate method based on sliding mode observer is studied. The design of sliding mode observer is based on the “two-branch” equivalent circuit...
Motion control system is the core component of high density packaging equipment, the characteristics of its movement performance directly determines the performance and quality of the high density packaging equipment. Based on this, this paper presents a method to enhance the dynamic performance and setting performance of motion control system by means of fine tuning for the movement parameters of...
Decentralized coded caching is applicable in scenarios where the server does not have enough knowledge about the entire cache network to perform centralized coordination during prefetching, such as when the server is uninformed of the number of active users and their identities in a wireless or mobile environment. Most of known decentralized strategies use random uncoded prefetching followed by coded...
Aim at handling complicated maneuvers or other unpredicted emergencies, an estimation method of aerodynamic parameter via the Cubature Kalman Filter/Smoother (CKF/S) is proposed for maneuvering reentry vehicle (MaRV) tracking. The aerodynamic model is deduced in order to define the aerodynamic parameter at first. Secondly, the statistical properties of aerodynamic parameters are described by first-order...
A novel non-contact measurement system based on the principle of neural network function approximation is designed, which can be used for high-precision measurement of linear travel in extreme environment. The GMR (Giant Magnetoresistance) sensor is used as the sensing unit. The COMSOL software is used to obtain the distribution law of the magnetic field in space by modeling and simulating the permanent...
Model-based optimization methods and discriminative learning methods have been the two dominant strategies for solving various inverse problems in low-level vision. Typically, those two kinds of methods have their respective merits and drawbacks, e.g., model-based optimization methods are flexible for handling different inverse problems but are usually time-consuming with sophisticated priors for...
After years of development as the main force over the counter market, now the National Equities Exchange and Quotations, commonly known as the new over-the-counter market, has formed a fairly large scale. The number of enterprises grows rapidly and there have been more than 10000 enterprises in the new over-the-counter market today, bringing the trading boom. However, in the thriving new over-the-counter...
In this paper, we propose an adaptive stabilizer to solve the stability problem of single inverted pendulum system. The stabilizer, which consists of a nested saturation feedback controller and a logic-based online-tuning mechanism, is designed for a class of nonlinear feed-forward systems. The function of the online-tuning mechanism is to adjust the level of saturation in the controller according...
This paper reviews the first challenge on single image super-resolution (restoration of rich details in an low resolution image) with focus on proposed solutions and results. A new DIVerse 2K resolution image dataset (DIV2K) was employed. The challenge had 6 competitions divided into 2 tracks with 3 magnification factors each. Track 1 employed the standard bicubic downscaling setup, while Track 2...
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.