منابع مشابه
Time-delay Measurement for the Quadruple Lens Rx J1131−1231
We have measured the three time delays for the quadruple gravitational lens RX J1131−1231 using two seasons of monitoring data. The short delays between cusp images are A–B = 11.98 −1.27 days and A–C = 9.61 −1.57 days. The long A–D delay for the counter image is not as precisely determined because of the season gaps, but the data suggest a delay of −87±8 days. The short delays are difficult to ...
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هدف اصلی از این تحقیق به دست آوردن و مقایسه حق بیمه باورمندی در مدل های شمارشی گزارش نشده برای داده های طولی می باشد. در این تحقیق حق بیمه های پبش گویی بر اساس توابع ضرر مربع خطا و نمایی محاسبه شده و با هم مقایسه می شود. تمایل به گرفتن پاداش و جایزه یکی از دلایل مهم برای گزارش ندادن تصادفات می باشد و افراد برای استفاده از تخفیف اغلب از گزارش تصادفات با هزینه پائین خودداری می کنند، در این تحقیق ...
15 صفحه اولA New Method for Time-Delay Compensation in Control Systems
In this paper a new method is introduced and investigated for removing the destabilizing effects of time-delay parameter in control loops. The concept of the method is taken from the knowledge concerning the dynamic behaviour of irrational transfer functions (Ir-TF), which is discussed and investigated elswhere in frequency response domain and is explained briefly here. Ir-TFs, which are we...
متن کاملSome New Methods for Prediction of Time Series by Wavelets
Extended Abstract. Forecasting is one of the most important purposes of time series analysis. For many years, classical methods were used for this aim. But these methods do not give good performance results for real time series due to non-linearity and non-stationarity of these data sets. On one hand, most of real world time series data display a time-varying second order structure. On th...
متن کاملRx for Semantics∗
A constructive framework of recent work in the semantics of programming languages is offered. The criticism is directed not so much at the techniques and results obtained as at the use to which they are put. The fact that denotational (or “mathematical”) semantics plays on the whole a passive (“descriptive”) rôle, while operational semantics plays on the whole an active (“prescriptive”) rôle, i...
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ژورنال
عنوان ژورنال: Science
سال: 2014
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.1252603