Techno-economic considerations for a small or medium nuclear system built within a limited time interval / Technisch-wirtschaftliche Überlegungen zu einem kleinen oder mittleren, in begrenzter Zeit zu errichtenden Kernenergie-Versorgungssystem

Kerntechnik ◽  
1989 ◽  
Vol 54 (1) ◽  
pp. 57-61
Author(s):  
V. Knapp ◽  
D. Pevec ◽  
R. Vojvodic
Keyword(s):  
Time Interval ◽  
Limited Time ◽  
Nuclear System ◽  
Economic Considerations ◽  
Limited Time Interval

scholarly journals Modelling the Structure of the Ringed Spiral NGC 4736

1996 ◽  
Vol 157 ◽  
pp. 253-255
Author(s):  
Wim van Driel ◽  
Pieter Mulder ◽  
Françoise Combes
Keyword(s):  
Mass Distribution ◽  
Spiral Structure ◽  
Optical Spectra ◽  
Spectral Lines ◽  
Time Interval ◽  
Limited Time ◽  
The Galaxy ◽  
Dynamical Simulations ◽  
Pattern Speed ◽  
Limited Time Interval

AbstractWe studied the ringed RSab(r)-type spiral NGC 4736, which has a probably slightly oval disk and a very small bar. We mapped the galaxy in the HI and Hα spectral lines and we obtained long-slit optical spectra. These data were modeled using a 2-D gas dynamical code. The 2-D potential used is axisymmetric in the inner and outer regions and oval (b/a=0.8) at intermediate radii only. The oval component rotates at a pattern speed of 40 km s–1 kpc–1, close to the observed value. Inner and outer rings, like those observed, form at the inner and outer Lindblad resonances, though they co-exist only during a limited time interval in the simulations. The morphology and kinematics of the inner ring and spiral structure as observed in neutral and ionized hydrogen can be well understood in terms of gas dynamical simulations, given the form of the (stellar) potential. What remains to be explained is the origin of the nonaxisymmetric features in the mass distribution defining the potential.

Model Based Targets Matching from Image Frames

2011 ◽  
Vol 341-342 ◽  
pp. 748-752
Author(s):  
Xin Wang ◽  
Jin Wang
Keyword(s):  
Image Sequence ◽  
Image Point ◽  
Time Interval ◽  
Limited Time ◽  
Feature Points ◽  
Model Based ◽  
Moving Platform ◽  
Limited Time Interval

We present a new algorithm to locate targets by matching image frames taken from a moving platform. We have noticed that an image point is environment sensitive, but those energy changes of grouped points have their own statistical similarities in two image frames within limited time interval. This approach analyzes correspondence of energy points around every feature points between inter-frames in image sequence in order to decide those feature points. Successful results are given for a vide frames.

Resonant Wave-Particle Interaction in Nonuniform Plasmas

1971 ◽  
Vol 26 (9) ◽  
pp. 1528-1530
Author(s):  
L. Saitta ◽  
F. Engelmann
Keyword(s):  
Particle Interaction ◽  
Time Interval ◽  
Limited Time ◽  
Linear Dynamics ◽  
Wave Particle Interaction ◽  
Resonant Wave ◽  
Parabolic Potential ◽  
Resonant Effect ◽  
Special Case ◽  
Limited Time Interval

Abstract The appearance of resonant-particle effects in the linear dynamics of electron waves in a plasma whose electrons are trapped in a potential trough is discussed and conditions for the characteristic times involved are derived. For the special case of a parabolic potential trough it is shown that, within a limited time interval, a strong resonant effect may occur, due to the interaction of a wave with all particles, which is not contained in the solutions given so far.

scholarly journals Detection of Short-Step Pulses Using Practical Test-Functions and Resonance Aspects

2008 ◽  
Vol 2008 ◽  
pp. 1-15 ◽  
Author(s):  
Alexandru Toma ◽  
Cristian Morarescu
Keyword(s):  
Second Order ◽  
Order System ◽  
Time Interval ◽  
Limited Time ◽  
Large Step ◽  
Working Frequency ◽  
Second Order Systems ◽  
Intelligent Methods ◽  
Physical Quantities ◽  
Limited Time Interval

An important aspect in modeling dynamic phenomena consists in measuring with higher accuracy some physical quantities corresponding to the dynamic system. Yet for measurements performed on limited time interval at high working frequency, certain intelligent methods should be added. The high working frequency requires that the measurement and data processing time interval should be greater than the time interval when the step input is received, so as to allow an accurate measurement. This paper will show that an intelligent processing method based on oscillating second-order systems working on limited time interval can differentiate between large step inputs (which are active on the whole limited time interval) and short step inputs (which are active on a time interval shorter than the limited working period). Some resonance aspects (appearing when the input frequency is close to the working frequency of the oscillating second-order system) will be also presented.

scholarly journals Signal Processing and Sampling Method for Obtaining Time Series Corresponding to Higher Order Derivatives

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Andreea Sterian ◽  
Alexandru Toma
Keyword(s):  
Time Series ◽  
Dynamic System ◽  
Sampling Procedure ◽  
Higher Order ◽  
Time Interval ◽  
Limited Time ◽  
Time Intervals ◽  
Oscillating Systems ◽  
Robust Computation ◽  
Derivatives Of

For modeling and controlling dynamic phenomena it is important to establish with higher accuracy some significant quantities corresponding to the dynamic system. For fast phenomena, such significant quantities are represented by the derivatives of the received signals. In case of advanced computer modeling, the received signal should be filtered and converted into a time series corresponding to the estimated values for the dynamic system through a sampling procedure. This paper will show that present-day methods for computing in a robust manner the first derivative of a received signal (using an oscillating system working on a limited time interval and a supplementary differentiation method) can be extended to the robust computation of higher order derivatives of the received signal by using a specific set of second-order oscillating systems (working also on limited time intervals) so as estimative values for higher-order derivatives are to be directly generated (avoiding the necessity of additional differentiation or amplifying procedures, which represent a source of supplementary errors in present-day methods).

scholarly journals JUSTIFICATION FOR THE EXPEDIENCY OF SHIP RECYCLING

2020 ◽  
pp. 54-59
Author(s):  
Yuri A. Kochnev ◽  
Irina B. Kochneva
Keyword(s):  
Environmental Effect ◽  
Technical Condition ◽  
Time Interval ◽  
Conditional Time ◽  
Unlimited Time ◽  
Ship Recycling ◽  
Actual Damage ◽  
And Storage ◽  
Economic Considerations ◽  
Unambiguous Conclusion

The decision of a ship recycling is usually made only on the basis of economic considerations – the possibility of selling materials and equipment for reuse. But the actual damage to the environment is not estimated, as from a disposition (emissions from cutting and storage of waste which is not a subject to further use and processing) and the ship storage on the certain territory which is either a coastline or a section of backwater, and which in most cases is not designed for this. The article considers the approach allowing to estimate the environmental effect of cutting up a ship, in comparison with its storage in a conditionally unlimited time interval. An unambiguous conclusion was obtained about the effectiveness of this type of treatment of the ship as waste. The method for determining a certain conditional time for making a decision on the method and place of recycling, applicable to a ship that is in an unsuitable technical condition is proposed.

Does Temporal Expectation Driven by Rhythmic Cues Differ From That Driven by Symbolic Cues Across the Millisecond and Second Range?

Perception ◽  
2019 ◽  
Vol 48 (6) ◽  
pp. 515-529 ◽  
Author(s):  
Yanna Ren ◽  
Zhihan Xu ◽  
Fengxia Wu ◽  
Yoshimichi Ejima ◽  
Jiajia Yang ◽  
...  
Keyword(s):  
Short Interval ◽  
Time Range ◽  
Time Interval ◽  
Ms Medium ◽  
Limited Time ◽  
Temporal Scales ◽  
Predictive Information ◽  
Temporal Expectation ◽  
Significant Difference ◽  
Symbolic Cues

Temporal expectation relies on different predictive information, such as regular rhythms and symbolic cues, to direct attention to a future moment in time to optimize behaviour. However, whether differences exist between temporal expectations driven by regular rhythms and symbolic cues has not been clearly established. In this study, 20 participants performed two temporal expectation tasks in which a rhythmic cue or a symbolic cue indicated (70% expected) that the target would appear after an interval of 500 ms (short), 1,500 ms (medium), or 2,500 ms (long). We found larger cueing effects for the rhythmic cued task than for the symbolic cued task during the short interval, indicating that rhythmic cues were more effective in improving performance. Furthermore, no significant difference was found during the longer interval, reflect that the behavioural differences between the two forms of temporal expectations were likely to diminish as the time interval increased. Thus, we speculate that the temporal expectation driven by rhythmic cues differs from that driven by symbolic cues only in the limited time range; however, the mechanisms underlying the two forms of temporal expectations trend to become more similar over increasing temporal scales.

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