Showing 1-25 of 162 resultsfor "Index Terms":Cyan Curve
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Preserving Monotonicity of Ball Curve and it's Curvature Profile
2021 6th IEEE International Conference on Recent Advances and Innovations in Engineering (ICRAIE)
Year: 2021 | Conference Paper |
Preserving the properties of real data is crucial especially to maintain the information and original shape of the data. This paper proposes a rational cubic Ball function that can interpolate real data as well as preserving the monotonicity of the data. Four shape parameters are proposed and sufficient conditions are imposed to the function. Some numerical results are presented together with comp...Show More
Geodesic Cutting and Grinding curve
2010 IEEE 11th International Conference on Computer-Aided Industrial Design & Conceptual Design 1
Year: 2010 | Conference Paper |
An algorithm to compute a geodesic path over an arbitrary topological mesh was presented. Given two points over an arbitrary topological mesh, an initial approximation of discrete geodesic between two points is obtained by using Fast Marching Method. Initial approximation is iteratively corrected by getting the intersection point of two space straight lines. Thus a discrete geodesic between two po...Show More
Investigation of a Digital Non-Foster RC Circuit Using Pade and Prony Approximations
Sunny Arokia Swamy Bellary;Nelyadi S. Shetty;Ryan C. Hill;Thomas P. Weldon;James M. Conrad
SoutheastCon 2018
Year: 2018 | Conference Paper |
Non-Foster circuits can be used to improve the performance and bandwidth of existing applications, and to enable new technologies such as acoustic cloaking. Although analog approaches for the implementation of non-Foster circuits have existed for some time, digital discrete-time implementations of non-Foster circuits have recently been introduced. Previous digital discrete-time implementations of ...Show More
The mass budget of planet-forming discs: isolating the epoch of planetesimal formation
The high rate of planet detection among solar-type stars argues that planet formation is common. It is also generally assumed that planets form in protoplanetary discs like those observed in nearby star-forming regions. On what time-scale does the transformation from discs to planets occur? Here, we show that current inventories of planets and protoplanetary discs are sensitive enough to place bas...Show More
An exploration of double diffusive convection in Jupiter as a result of hydrogen–helium phase separation
Jupiter's atmosphere has been observed to be depleted in helium (Yatm ∼ 0.24), suggesting active helium sedimentation in the interior. This is accounted for in standard Jupiter structure and evolution models through the assumption of an outer, He-depleted envelope that is separated from the He-enriched deep interior by a sharp boundary. Here we aim to develop a model for Jupiter's inhomogeneous th...Show More
Nearly optimal non-Gaussian codes for the Gaussian interference channel
2015 49th Asilomar Conference on Signals, Systems and Computers
Year: 2015 | Conference Paper |
Recent work demonstrated that for the two-user Gaussian Interference Channel (G-IC) sub-optimal point-to-point codes can outperform optimal (Gaussian) point-to-point codes. However, it is not clear how far from capacity such sub-optimal codes operate. This work demonstrates a family of sub-optimal codes, generated from a mixture of Gaussian and discrete random variables, that is optimal up to an a...Show More
Comparison of fault currents in multiterminal HVDC grids with different grounding schemes
2014 IEEE PES General Meeting | Conference & Exposition
Year: 2014 | Conference Paper |
The requirements of dc circuit breakers used to protect multiterminal HVDC networks are specified by the prospective fault current. The fault current, however, strongly depends on the grounding scheme of the network. Low-ohmic and high-impedance earthing practices with different grounding points are presented and compared with each other in terms of fault currents and overvoltages during a pole-to...Show More
A re-examination of galactic conformity and a comparison with semi-analytic models of galaxy formation
The observed correlation between star formation in central galaxies and in their neighbours (a phenomenon dubbed ‘galactic conformity’) is in need of a convincing physical explanation. To gain further insight, we use a volume-limited sample of galaxies with redshifts less than 0.03 drawn from the Sloan Digital Sky Survey Data Release 7 to investigate the scale dependence of the effect and how it c...Show More
Perturbation theory and excursion set estimates of the probability distribution function of dark matter, and a method for reconstructing the initial distribution function
Non-linear evolution is sometimes modelled by assuming there is a deterministic mapping from initial to final values of the locally smoothed overdensity. However, if an underdense region is embedded in a denser one, then it is possible that its evolution is determined by its surroundings, so the mapping between initial and final overdensities is not as ‘local’ as one might have assumed. If this so...Show More
Radio pulsar glitches as a state-dependent Poisson process
Gross–Pitaevskii simulations of vortex avalanches in a neutron star superfluid are limited computationally to ≲102 vortices and ≲102 avalanches, making it hard to study the long-term statistics of radio pulsar glitches in realistically sized systems. Here, an idealized, mean-field model of the observed Gross–Pitaevskii dynamics is presented, in which vortex unpinning is approximated as a state-dep...Show More
Implementation of the Gamma (γ) Line System Similar to Non-linear Gamma Curve with 2bit Error(LSB)
Wonwoo Jang;Hyunsik Kim;Sungmok Lee;Jooyoung Ha;Bongsoon Kang
APCCAS 2006 - 2006 IEEE Asia Pacific Conference on Circuits and Systems
Year: 2006 | Conference Paper |
Cited by: Papers (2)
Gamma correction is an essential function in every display device such as CRT, plasma TV, and TFT LCD. (Po-Ming Lee, 2005) proposed gamma (γ) correction systems are developed to reduce the difference between non-linear gamma curve produced by a typical formula and result produced by the proposed algorithm. The proposed algorithms and systems are based on the specific gamma value such as 2.2, namel...Show More
Black hole mass estimate for a sample of radio-loud narrow-line Seyfert 1 galaxies
We discuss the relationship between a standard Shakura & Sunyaev accretion disc model and the big blue bump (BBB) observed in Type 1 active galactic nuclei. Given the similarity between the BBB and the predicted disc spectrum, we propose a new method to estimate black hole masses which relies on the modelling of both optical and UV data with a Shakura & Sunyaev disc spectrum. We apply this method ...Show More
The dynamical phase transitions of stellar systems and the corresponding kinematics
External fields in Milgromian dynamics (MD or MOND) break the Strong Equivalence Principle (SEP) and change the dynamics of self-bound stellar systems moving in space-varying background gravitational fields. We study two kinds of re-virialization of the stellar systems: the violent phase transition and the adiabatic phase transition for systems moving on radial orbits, where the external field evo...Show More
We review methods for determining the fractal dimensions of earthquake epicentres and hypocentres, paying special attention to the problem of errors, biases and systematic effects. Among effects considered are earthquake location errors, boundary effects, inhomogeneity of depth distribution and temporal dependence. In particular, the correlation dimension of earthquake spatial distribution is disc...Show More
Lithographic Source and Mask Optimization With Low Aberration Sensitivity
Source and mask optimization (SMO) is an important lithographic resolution enhancement technology. Recently, some research indicate that the lithography performance is sensitive to the errors of an actual lithography system, such as thermal aberration, thick mask effects, and mask uncertainties. Most of the errors would result in uncertain wavefront aberration, so the reduction of aberration sensi...Show More
Influence of voltage feed-forward control on small-signal stability of grid-tied inverters
2015 IEEE Applied Power Electronics Conference and Exposition (APEC)
Year: 2015 | Conference Paper |
Cited by: Papers (8)
In balanced three-phase systems, source impedance and load admittance matrices in the synchronous rotating (d-q) frame can be used to determine system small-signal stability based on the Generalized Nyquist stability Criterion (GNC). For grid-tied inverters, voltage feed-forward control (VFFC) is widely used due to its fast transient dynamics. Through modeling the d-q frame admittances of three-ph...Show More
Noise-based ballistic wave passive seismic monitoring – Part 2: surface waves
Geophysical Journal International
Cited by: Papers (1)
We develop a new method to monitor and locate seismic velocity changes in the subsurface using seismic noise interferometry. Contrary to most ambient noise monitoring techniques, we use the ballistic Rayleigh waves computed from 30 d records on a dense nodal array located above the Groningen gas field (the Netherlands), instead of their coda waves. We infer the daily relative phase velocity disper...Show More
Compensation of frequency dependent parasitic resistance in a CMOS linvill negative inductor
Varun S. Kshatri;John M. C. Covington;Thomas P. Weldon;Ryan S. Adams
This paper presents an effective approach for reducing parasitic resistance of a CMOS negative inductor with a single compensating resistor. A compensating resistor is used to mitigate the effect of parasitic resistance with quadratic frequency dependence. The undesired parasitic effect is induced by the inevitable finite drain-source resistance of the input CMOS transistor of the most common Linv...Show More
On the distribution of small-scale roughness at the edges of monomolecular surface films
MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)
Year: 2001 | Conference Paper |
The authors have carried out wind-wave tank measurements of wave slopes, radar backscattering, and video image intensity, while the water surface was covered with small patches of surface-active material. Their results show that, at low wind speed, the slick patches consist of regions of different damping behavior caused by the freshly spread slick. By analyzing the radar Doppler shifts they could...Show More
Jet contributions to the broad-band spectrum of Cyg X-1 in the hard state
We apply the jet model developed in the preceding paper of Zdziarski et al. to the hard-state emission spectra of Cyg X-1. We augment the model for the analytical treatment of the particle evolution beyond the energy dissipation region, and allow for various forms of the acceleration rate. We calculate the resulting electron and emission spectra as functions of the jet height, along with the emiss...Show More
Modified Modulation Techniques for Quasi-Z-Source Cascaded H-Bridge Inverters
IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society
Year: 2018 | Conference Paper |
Cited by: Papers (11)
Quasi-Z-source cascaded H-bridge (qZS-CHB) inverters are one promising solution for high power photovoltaic (PV) systems. This type of topologies inherits the advantages of cascaded converters (i.e., multilevel outputs) and impedance-source inverters (i.e., high conversion ratios). In addition, it allows increasing the inverter reliability (with high redundancy). However, the modulation and contro...Show More
Gate Driver Design for 1.2 kV SiC Module with PCB Integrated Rogowski Coil Protection Circuit
Marco Stecca;Panagiotis Tiftikidis;Thiago Batista Soeiro;Pavol Bauer
2021 IEEE Energy Conversion Congress and Exposition (ECCE)
Year: 2021 | Conference Paper |
Cited by: Papers (8)
Wide band-gap materials, e.g., Silicon Carbide (SiC), allow the realization of power semiconductor with superior performance with respect to the traditional Si-based counterparts. On the other hand they require more stringent short-circuit or over-current clearing time to safeguard the device lifetime. This paper focuses on the analysis, design guidelines and practical implementation of a gate dri...Show More
Downlink coverage probability with spatially non-uniform user distribution around social attractors
2017 24th International Conference on Telecommunications (ICT)
Year: 2017 | Conference Paper |
Cited by: Papers (3)
Heterogeneity is one of the most significant features of next generation (5G) wireless networks. The spatial distribution of users in heterogeneous networks (HetNets) impacts the system performance. Currently it is often assumed that spatial users are uniformly distributed, i.e. Poisson point process (PPP). A more realistic user distribution model is a Poisson cluster process (PCP) because current...Show More
Trajectory planning is the core module of autonomous driving system and its main challenges lie in the decisions in non-convex space and the trade-off between safety, comfort and efficiency performances. This paper presents a noval framework that combines trapezoidal cell decomposition and convex optimization to generate optimal trajectories for autonomous vehicles in structured environment. The a...Show More
Homotopy analysis of the Lippmann–Schwinger equation for seismic wavefield modelling in strongly scattering media
Geophysical Journal International
Cited by: Papers (1)
We present an application of the homotopy analysis method for solving the integral equations of the Lippmann–Schwinger type, which occurs frequently in acoustic and seismic scattering theory. In this method, a series solution is created which is guaranteed to converge independent of the scattering potential. This series solution differs from the conventional Born series because it contains two aux...Show More
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