Xem 1-20 trên 59 kết quả Density function
  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article An Iterative Soft Bit Error Rate Estimation of Any Digital Communication Systems Using a Nonparametric Probability Density Function

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Audio Query by Example Using Similarity Measures between Probability Density Functions of Features

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  • Biomedical research has entered a new era of characterizing a disease or a protein on a global scale. In the post-genomic era, Proteomics now plays an increasingly important role in dissecting molecular functions of proteins and discovering biomarkers in human diseases. Mass spectrometry, two-dimensional gel electrophoresis, and high-density antibody and protein arrays are some of the most commonly used methods in the Proteomics field.

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  • The geometries and spin densities of green tea catechin radicals are calculated using unrestricted B3LYP hydrid density functional calculations. The radicals which have the smallest value of Maximum Spin Density (MSD) are referred to the most stable radical species deriving from the absolute minimum energy of investigated compounds. In this study, we have calculated these values in gas phase and water solution.

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  • In this paper the spline approximation was applied to the empirical vertical profiles of oceanographic parameters such as temperature, salinity or density to obtain a more precise and reliable result of interpolation. Our experiments with the case of observed temperature profiles in Eastern Sea show that the cubic polynomial spline method has a higher reliability and precision in a comparison with the linear interpolation and other traditional methods. The method was realized as a subroutine in our programs for oceanographic data management and manipulation.

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  • The geometries and spin density distribution of phenolic radicals are investigated by density functional theory (DFT) at the B3LYP level. Rusults are indicated that spin density distribution of phenolic radicals is high at the O and C (para) positions.

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  • In recent years, much attention has been focused on making polyethylene degradable. The purpose of this work is to make degradable film from depolymerized tapioca starch and linear- low-density polyethylene (LLDPE) grafted with anhydride maleic (MA), using peroxide benzoyl as initiator and peanut oil as compatibilizer.

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  • Tín hiệu năng lượng: – Energy spectral density (ESD): • Tín hiệu công suất: – Power spectral density (PSD): • Quá trình ngẫu nhiên: – Power spectral density (PSD): Facuty of Electronics & Telecommunications 31 .3. Một số khái niệm Nhiễu trong hệ thống truyền thông Nhiễu nhiệt n(t) được diễn tả bởi một quá trình ngẫu nhiên Gaussian có trị trung bình bằng 0. PSD của nhiễu nhiệt thì phẳng vì vậy gọi là nhiễu trắng.

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  • For many random variables, the probability distribution is a specific bell-shaped curve, called the normal curve, or Gaussian curve. This is the most common and useful distribution in statistics. 1) Standard normal distribution The standard normal distribution has the probability density function as follows:

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  • Forests play a major role in global carbon (C) cycle, and the carbon density (CD) could reflect its ecological function of C sequestration. Study on the CD of different forest types on a community scale is crucial to characterize in depth the capacity of forest C sequestration.

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  • Area, constant a Constant B Constant b Constant C Coefficient of variation d Diameter Fi /th failure, cumulative distribution function F(JC) Cumulative distribution function corresponding to x ft Class frequency f(x) Probability density function corresponding to x h Simpson's rule interval i failure number, index LN Lognormal TV Normal n design factor, sample size, population n mean of design factor distribution P Probability, probability of failure R Reliability, probability of success or survival...

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  • Room temperature ionic liquids (RTILs) are an interesting and valuable family of compounds. Although they are all salts, their components can vary considerably, including imidazolium, pyridinium, ammonium, phosphonium, thiazolium, and triazolium cations. In general, these cations have been combined with weakly coordinating anions. Common examples include tetrafluoroborate, hexafluorophosphate, triflate, triflimide, and dicyanimide.

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  • CHAPTER 2 STATISTICAL CONSIDERATIONS Charles R. Mischke, Ph.D., RE. Professor Emeritus of Mechanical Engineering Iowa State University Ames, Iowa 2.1 INTRODUCTION / 2.2 2.2 HISTOGRAPHIC EVIDENCE / 2.3 2.3 USEFUL DISTRIBUTIONS / 2.9 2.4 RANDOM-VARIABLE ALGEBRA / 2.13 2.5 STOCHASTIC ENDURANCE LIMIT BY CORRELATION AND BY TEST / 2.16 2.6 INTERFERENCE / 2.19 2.7 NUMBERS / 2.25 REFERENCES / 2.

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  • Power Spectral Density Analysis In this chapter, general results for the power spectral density that facilitate evaluation of the power spectral density of specific random processes are given. First, the nature of the Fourier transform on the infinite interval is discussed and a criterion is given for the power spectral density to be bounded on this interval. Second, the use of an alternative power spectral density function that can be defined for the case where a signal consists of a sum of orthogonal or disjoint waveforms is discussed. ...

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  • Chapter 12 Random Walks 12.1 Random Walks in Euclidean Space In the last several chapters, we have studied sums of random variables with the goal being to describe the distribution and density functions of the sum. In this chapter, we shall look at sums of discrete random variables from a different perspective.

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  • Poklonski et al. Nanoscale Research Letters 2011, 6:216 http://www.nanoscalereslett.

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  • Assadi et al. Nanoscale Research Letters 2011, 6:357 http://www.nanoscalereslett.com/content/6/1/357 NANO REVIEW Open Access Structural and electronic properties of Eu- and Pd-doped ZnO Mohammad Hussein Naseef Assadi1,2, Yuebin Zhang2, Rong-Kun Zheng1, Simon Peter Ringer1 and Sean Li2* Abstract Doping ZnO with rare earth and 4d transition elements is a popular technique to manipulate the optical properties of ZnO systems. These systems may also possess intrinsic ferromagnetism due to their magnetic moment borne on 4f and 4d electrons.

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  • To design a team of robots which is able to perform given tasks is a great concern of many members of robotics community. There are many problems left to be solved in order to have the fully functional robot team. Robotics community is trying hard to solve such problems (navigation, task allocation, communication, adaptation, control, ...).

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  • The glass must be without optical faults, neither as far as geometry nor as far as colorimetry are concerned. The use of glass whose surface and density are treated is recommended. You have to use an extra white glass with anti-reflecting coating; this avoids any losses due to absorption of 10 % of the luminous flux. Be careful: some glasses may cause problems with 3D passive polarized light. Portholes that are installed in booths serving several auditoria have to meet the security standards,...

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  • The mathematical theory now known as Malliavin calculus was first introduced by Paul Malliavin in [157] as an infinite-dimensional integration by parts technique. The purpose of this calculus was to prove the results about the smoothness of densities of solutions of stochastic differential equations driven by Brownian motion. For several years this was the only known application. Therefore, since this theory was considered quite complicated by many, Malliavin calculus remained a relatively unknown theory also among mathematicians for some time.

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