نتایج جستجو برای: quency domain

تعداد نتایج: 405943  

Journal: :فیزیک زمین و فضا 0
جلیل ناصری کارشناس ارشد ژئوفیزیک، شرکت eni حمیدرضا سیاهکوهی دانشیار، گروه فیزیک زمین، مؤسسة ژئوفیزیک دانشگاه تهران، ایران

in seismic exploration studies different types of techniques are used to recognize seismic features in terms of their temporal and spatial spectra. variations in frequency content are sensitive to subtle changes in reflection information (castro de matos et al., 2003). in this study the joint time-frequency analysis is used for seismic texture recognition. discrete wavelet transform (dwt) witho...

Journal: :روانپزشکی و روانشناسی بالینی ایران 0
محمد خدایاری فرد mohamad khodayari fard educational sciences faculty, tehran university, jalal-ai-ahmad, expressway, tehran, i,rخیابان آل احمد،رو به روی کوی نصر،دانشکده روانشناسی و علوم تربیتی دانشگاه تهران باقر غباری بناب bagher ghobari bonab خیابان آل احمد،رو به روی کوی نصر،دانشکده روانشناسی و علوم تربیتی دانشگاه تهران محسن شکوهی یکتا mohsen . shokouhi yekta خیابان آل احمد،رو به روی کوی نصر،دانشکده روانشناسی و علوم تربیتی دانشگاه تهران

the studies on psychology of religion, which began in the 19th century in the context of experimental psychology and psychoanalysis, fall into two categories those which explore the impact of religion on various individuals and social dimensions, and those which concentrate on the methodology of religion. the present paper deals with the former category. few studies have so far shown a positive...

An integral domain $D$ is called a emph{locally GCD domain} if $D_{M}$ is aGCD domain for every maximal ideal $M$ of $D$. We study somering-theoretic properties of locally GCD domains. E.g., we show that $%D$ is a locally GCD domain if and only if $aDcap bD$ is locally principalfor all $0neq a,bin D$, and flat overrings of a locally GCD domain arelocally GCD. We also show that the t-class group...

Journal: :آب و خاک 0
داوود نامدار خجسته مهدی شرفا محمود فاضلی سنگانی

abstract time domain reflectometry (tdr) is a widely used method for measuring the dielectric constant (ka) and bulk electrical conductivity (σa) in soils. the tdr-measured σa and ka can be used to calculate the soil solution electrical conductivity, (σp). a theoretical model describing a linear relationship between bulk electrical conductivity, σa, and dielectric constant, ka, in moist soil wa...

Domain adaptation is a powerful technique given a wide amount of labeled data from similar attributes in different domains. In real-world applications, there is a huge number of data but almost more of them are unlabeled. It is effective in image classification where it is expensive and time-consuming to obtain adequate label data. We propose a novel method named DALRRL, which consists of deep ...

Journal: :Radio physics and radio astronomy 2023

Subject and Purpose. Results are presented of the solar corona investigations performed with world famous Ukrainian radio telescopes. The work has been aimed at offering a consistent review recent achievements in observations variety low-frequency emissions from Sun. Methods Methodology. studies quiet (thermal) sporadic (burst-like) Sun have car- ried out decameter-wavelength telescopes UTR-2, ...

Journal: : 2023

The Integrated Energy System (IES) of Ukraine functions as part the European Union (EU) electric power system ENTSO-E. Each country whose IES operates in ENTSO-E structure must ensure presence a full-fledged fre-quency and automatic control (AFPCS, AFPC system) national IES. only exception is Ukraine, because its inclusion happened during martial law absence herewith system. It violates corners...

ژورنال: کنترل 2019

This paper presents a new approach to estimate and to enlarge the domain of attraction for a planar continuous-time piecewise affine system. Various continuous Lyapunov functions have been proposed to estimate and to enlarge the system’s domain of attraction. In the proposed method with a new vision and with the aids of a discontinuous piecewise quadratic Lyapunov function, the domain of attrac...

Journal: :bulletin of the iranian mathematical society 2012
wu zhaojun chen yuxian

this paper uses the tsuji’s characteristic to investigate the uniqueness of transcen- dental meromorphic function with shared values in an angular domain dealing with the multiple values which improve a result of j. zheng.

P. Sahandi

Let $D$ be an integral domain and $star$ a semistar operation stable and of finite type on it. We define the semistar dimension (inequality) formula and discover their relations with $star$-universally catenarian domains and $star$-stably strong S-domains. As an application, we give new characterizations of $star$-quasi-Pr"{u}fer domains and UM$t$ domains in terms of dimension inequal...

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