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.
This paper presents a novel programmable biquadratic filter structure using a network of operational transconductance amplifier(OTA). A new hierarchical design methodology of programmable higher order analog filter using the proposed biquadratic function as the basic building block has been discussed. The proposed biquadratic structure offers multifunction property, better programmability, low sensitivity...
Matched circuit components are widely used in logic circuits including resistors, capacitors and transistors. Any variations in those components could cause mismatch in circuit performance. In advanced technology nodes, double patterning (litho/etch/litho/etch) process has been introduced to pattern BEOL metal and via levels. Two patterning steps (litho/etch/litho/etch) with two sets of masks for...
An approach to video stabilization for small unmanned aerial vehicles (UAVs) using computer vision techniques is proposed. As gimbals (mechanical video camera stabilizer) cannot be installed on UAVs with small payload, captured videos can be shaky. A development of ‘software image stabilizer’ has been suggested by a military institute to alleviate such adverse effect. We, similarly to other researchers,...
The electric potential drop technique is an effective crack monitoring method, especially in harsh environment conditions. With this method, the calibration curve, the relationship between potential drop across the crack and the crack sizes, is needed. This work applied a cell-centered finite volume discretisation with unstructured quadrilateral mesh to simulate the potential drop within cracked specimens...
New technologies are changing the world of communication networks and even more so their management. Cloud computing and predictive analytics have removed the need for specialized compute hardware and created products that continuously search for and find insights in management data. Virtualization of networks and network functions, SDN and NFV, are beginning to be mature enough for production networks...
Modern IT systems often produce large volumes of event logs, and event pattern discovery is an important log management task. For this purpose, data mining methods have been suggested in many previous works. In this paper, we present the LogCluster algorithm which implements data clustering and line pattern mining for textual event logs. The paper also describes an open source implementation of LogCluster.
In this report we summarize computational models for convective and diffusive drug transport within small blood vessels (capillaries) and tissue. The presented methodology is primarily focused on drug transport via micro-nanoparticles designed for nanotherapeutics in cancer. Our original multiscale hierarchical models couple nanoscale molecular dynamics (MD) and macroscale continuum finite element...
This research proposes the design and implementation of an automatic landing assistant system of fixed-wing unmanned aerial vehicle (UAV) using computer vision. In our research, the system was designed when radar or other sensing devices could not be used. For example, GPS-based guiding would be in effective in warfare. The procedure relies on a camera and an orientation sensor, combined with existing...
In this paper, we give a new definition of fuzzy contours in mammographic images and we propose an approach to get them. This approach starts from region of interest images with initial contours delimiting masses provided by an expert radiologist, and then it involves three major stages: mass segmentation using geometric deformable models, contour representation and finally definition of fuzzy contours...
Accuracy and efficiency are two important objectives of modeling ground penetrating radar (GPR) signal. Achieving both together is a driving factor for advanced research in the state of art for GPR community. Full wave model (FWM) promises great accuracy to detect layered media. However time efficiency of FWM is poor compared to other simplified models. This work presents a new plane wave model (PWM)...
The flexible operation modes of microgrid result in an extreme challenge for the protection and control of microgrid. Therefore, this paper proposed a centralized protection and control scheme for microgrid. To identify the faulted region conveniently, the microgrid is divided into several zones in advance. Intelligent circuit breakers communicate with each other, then send real-time information by...
In this paper, an energy harvesting system composed by a flexible thermoelectric generator (TEG) with a DC — DC converter is shown. The proposed generator has been produced by screen printing technology on 80μm thick common paper and thin Kapton foil and integrates about 280 thermocouples, for an output voltage of about 75mV with 5K of the thermal gradient, useful for wearable — oriented applications...
High dimensional data can lead to low accuracy of classification and take a long time to calculate because it contains irrelevant features and redundant features. To overcome this problem, dimension of data has to be reduced. Causal feature selection is one of methods for feature reduction but it cannot identify redundant features. This paper presents Parent-Children based for Causal Redundant Feature...
The ultimate goal of this study is to develop a robot that can play an alto recorder so that it sounds like a human is playing it. We have used unsteady flow rate measurements and control techniques in our research. It is particularly difficult for a robot to perform special musical effects, such as vibrato, tremolo, and tonguing. We present a method that models eight elements of the flow rate data...
This paper presents guidelines for component design of the three-level three-phase T-source inverter with continuous input current under maximum boost control proposed recently. Steady state analysis under low-frequency current and voltage ripples in the dc side was made. Component sizes for both with and without low-frequency ripples are estimated and compared. Simulation results have confirmed most...
This paper purposes a global optimization method that could be applied in parameter estimation of wind generation unit model. When complex nonlinear models, like a wind generation unit model are used, the parameter estimation based on local optimization methods, such as nonlinear least squares method or Newton's method, may not be able to find parameter values with acceptable accuracy. The global...
In this paper, a power system with an automatic generation control (AGC) in two contiguous areas are studied to demonstrate speed deviation of a generator due to photovoltaic (PV) power fluctuation in both time and frequency domains. The system is linearized and modeled in state-space representation. The change of the PV power is defined as the input of the system, and the change of speed deviation...
The correlation among wind velocity, light intensity and load is not considered in generation capacity configuration in microgrid. This paper proposes a combined sampling method which can consider the correlation based on Copula theory. It analyzes the law of data, then chooses the best Copula function of every segment to sample and combines all sampling result together. A mathematical model of capacity...
As is well known, the anti-peaking characteristic of wind generation leads to evident curtailments of wind farms. With high energy density and flexible installation position, the battery energy storage system (BESS) can provide a new routine to relax the bottleneck of the peak-load regulation, conducive to the absorption of wind power and the economy of system operation. Therefore, with taking account...
The mitigation of power quality issues by means of customized power conditioning systems are of growing interest in recent years. The electricity supply is exposed to more frequent power quality problems, especially due to the steadily increasing integration of decentralized power generation, penetration of renewable energy, and deployment of non-linear converter-based loads. Active power filters...
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.