نتایج جستجو برای: box or log normal distribution

تعداد نتایج: 4369375  

2016
Kwasi A. Darkwah Ezekiel N. N. Nortey Anani Lotsi

[This corrects the article DOI: 10.1186/s40064-016-2868-z.].

2008
Ehud Nakar Tsvi Piran

We analyze a sample of bright long bursts and find that the pulses duration have a lognormal distribution while the intervals between pulses have an excess of long intervals (relative to lognormal distribution). This excess can be explained by the existence of quiescent times, long periods with no signal above the background. The lognormal distribution of the intervals (excluding the quiescent ...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2002
R Y Yang R P Zou A B Yu

The packing of uniform fine spherical particles ranging from 1 to 1000 microm has been simulated by means of discrete particle simulation. The packing structure is analyzed, facilitated by the well established Voronoi tessellation. The topological and metric properties of Voronoi polyhedra are quantified as a function of particle size and packing density. The results show that as particle size ...

Journal: :Environmental pollution 2006
H H Zhang H X Yuan Y G Hu Z F Wu L A Zhu L Zhu F B Li D Q Li

Total of 260 soil profiles were reported to investigate the arsenic spatial distribution and vertical variation in Guangdong province. The arsenic concentration followed an approximately lognormal distribution. The arsenic geometric mean concentration of 10.4 mg/kg is higher than that of China. An upper baseline concentration of 23.4 mg/kg was estimated for surface soils. The influence of soil ...

Journal: :Physical review. E 2017
Bálint Korbuly Tamás Pusztai Hervé Henry Mathis Plapp Markus Apel László Gránásy

In the literature, contradictory results have been published regarding the form of the limiting (long-time) grain size distribution (LGSD) that characterizes the late stage grain coarsening in two-dimensional and quasi-two-dimensional polycrystalline systems. While experiments and the phase-field crystal (PFC) model (a simple dynamical density functional theory) indicate a log-normal distributi...

2008
Ehud Nakar Tsvi Piran

We show that according to the GRB internal shock model the pulse duration and the interval between neighboring pulses are correlated and have a similar distribution. We analyze a sample of bright long bursts and find that the pulses duration have a lognormal distribution while the intervals has an excess of long intervals (relative to lognormal distribution). This excess can be explained by the...

2009
Ananda Kusuma Arief Rufiyanto Satriyo Dharmanto Bambang Heru Tjahjono

Radio propagation measurement is carried out in Jakarta, Indonesia, in anticipation of digital TV implementation in the country. Measurements are made using a fixed, portable receiver outdoors and indoors. Spatial variations of the received power, both large-scale and small-scale, are measured in these locations. Results show that the largescale path loss variation characteristics, as described...

Journal: :Ecology 2010
Carlos M Herrera Roger Jovani

Individual variance in lifetime fecundity within populations is a life-history parameter of crucial evolutionary and ecological significance. However, knowledge of its magnitude and underlying mechanisms in natural populations is biased toward short-lived taxa. This paper summarizes results of a 23-year study on a population of the Mediterranean shrub Lavandula latifolia. We document the within...

1997
I. GULTEPE G. A. ISAAC

The vertical distribution of liquid water content (LWC) and its relationship with temperature (T) strongly affect the heat budget of the atmosphere. Some large-scale models of the atmosphere use a relationship between LWC and T to diagnostically obtain LWC from T under saturated conditions. Airborne observations conducted within clouds over northeastern North America during the 1984–93 time per...

Journal: :Communications in Statistics - Theory and Methods 2019

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