A Cartesian Based Mesh Generator with Body Fitted Boundary Layers

Özkan, Merve
Baran, Özgür Uğraş
Aksel, Mehmet Haluk


A low-order nonlinear amplifier model with distributed delay terms
YÜZER, AHMET HAYRETTİN; Demir, Şimşek (The Scientific and Technological Research Council of Turkey, 2014-01-01)
In this paper, a novel behavioral modeling technique for the characterization of memory effects of amplifiers is proposed. This characterization utilizes asymmetric intermodulation distortion (IMD)components, which are the result of a 2-tone excitation of a nonlinear amplifier. These asymmetric IMD components are represented basically by a power series, where each term in the series has its own time delay term. These time delay terms successfully justify the presence of asymmetry in the intermodulation comp...
A Local parameter estimator based on robust LAV estimation
Özdemir, Volkan; Göl, Murat; Department of Electrical and Electronics Engineering (2015)
There are parameter errors in power system models due to the change of weather conditions, such as temperature and humidity changes, miscommunication between the control center and the transducers of circuit breakers and tap changers, etc. Because of the incorrect parameters, the state estimator may provide biased state estimates which may lead to many serious economic and operational results. In order to prevent that, one must identify and correct those parameter errors. This work proposes a local paramete...
Okman, O. Erman; Akar, Gözde (2013-05-31)
In this paper a novel fast circle detection algorithm is proposed which depends on the spatial properties of the connected components on the image. Two 1-D transforms of each connected component is obtained by taking the Radon Transform of the image for two different directions, which are in fact the integrations of the image through horizontal and vertical directions. Circles are detected using the similarities of detected peaks on the transformed functions and the characteristics of the values in between ...
A Graph Signal Filtering Based Approach for Detection of Different Edge Typeson Airborne LiDAR Data
Bayram, Eda; Vural, Elif; Alatan, Abdullah Aydın (2017-09-12)
Airborne Laser Scanning is a well-known remote sensing technology, which provides a dense and highly accurate, yet unorganized point cloud of earth surface. During the last decade, extracting information from the data generated by airborne LiDAR systems has been addressed by many studies in geo-spatial analysis and urban monitoring applications. However, the processing of LiDAR point clouds is challenging due to their irregular structure and 3D geometry. In this study, we propose a novel framework for the d...
A Robust PMU Based Three-Phase State Estimator Using Modal Decoupling
Göl, Murat (2014-09-01)
Power systems do not always operate under fully balanced conditions because of unbalanced loads and untransposed transmission lines. Under such conditions, commonly used positive sequence equivalent will no longer be valid. On the other hand, use of full three-phase model will add significant computational burden for the considered application. This paper describes a simple approach to address this issue for the specific application of state estimation. The main idea is to exploit the linearity of the estim...
Citation Formats
M. Özkan, Ö. U. Baran, and M. H. Aksel, “A Cartesian Based Mesh Generator with Body Fitted Boundary Layers,” 2018, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/78358.