搜索结果: 136-150 共查到“统计物理学”相关记录351条 . 查询时间(6.25 秒)
Local Warming
temperatures Local Warming seasonal variations the 11-year solar cycle and a linear trend.
2012/11/23
Using 55 years of daily average temperatures from a local weather station, I made a least-absolute-deviations (LAD) regression model that accounts for three effects: seasonal variations, the 11-year s...
Reconstructing Structured Sparse Signals from Compressive Samples via a Max-Product EM Algorithm
Belief propagation expectation maximization (EM) algorithm hidden Markovtree(HMT) max-productalgo-rithm,structured sparsity,sparse signal reconstruction.
2012/11/22
We propose a Bayesian expectation-maximization (EM) algorithm for reconstructing structured approximately sparse signals via belief propagation. The measurements follow an underdetermined linear model...
第十七届全国凝聚态理论与统计物理学术会议在兰州大学举行(图)
全国凝聚态理论与统计物理学术 会议 举行
2012/8/3
2012年7月23日至25日，“第十七届全国凝聚态理论与统计物理学术会议”在兰州大学举行。兰州大学党委副书记、纪委书记李正元出席了开幕式并致辞。来自全国各地的86家高校和研究所共计320名代表（含5位中国科学院院士）参加了会议。
Spatiotemporal correlations of handset-based service usages
Spatiotemporal correlations handset-based service usages Physics and Society
2012/4/20
We study spatiotemporal correlations and temporal inhomogeneities of handset-based service usages by analyzing a dataset collected from 124 users for over 16 months. The dataset consists of detailed i...
Atomic structure of a single large biomolecule from diffraction patterns of random orientations
X-ray free electron lasers Single particle x-ray diffraction Orientation Structure reconstruction
2012/4/20
The short and intense pulses of the new X-ray free electron lasers, now operational or under construction, may make possible diffraction experiments on single molecule-sized objects with high resoluti...
Structural Analysis of Laplacian Spectral Properties with Application to Electric Transmission Networks
Laplacian Spectral Properties Electric Transmission Networks Optimization and Control
2011/8/18
Abstract: The spectrum of the Laplacian matrix of a network plays a key role in a wide range of dynamical problems associated with the network, from transient stability analysis of power networks to d...
Empirical analysis of collective human behavior for extraordinary events in blogosphere
Empirical analysis collective human behavior extraordinary events blogosphere
2011/8/11
Abstract: To explain collective human behavior in blogosphere, we survey more than 1.8 billion entries and observe statistical properties of word appearance. We first estimate the basic properties of ...
Mandelbrot Law of Evolving Networks
Mandelbrot Law Evolving Networks Degree distributions power-law exponent
2011/8/11
Abstract: Degree distributions of many real networks are known to follow the Mandelbrot law, which can be considered as an extension of the power law that determined by not only the power-law exponent...
A method for filling gaps in solar irradiance and in solar proxy data
filling gaps solar irradiance solar proxy data
2011/8/17
Abstract: Data gaps are ubiquitous in spectral irradiance data, and yet, little effort has been put into finding robust methods for filling them. We introduce a data-adaptive and nonparametric method ...
Lognormal Distribution of Single Molecule Fluorescence Bursts in Micro/Nano-Fluidic Channels
Lognormal Distribution Single Molecule Fluorescence Burst Micro/Nano-Fluidic Channels
2011/8/5
Abstract: The width and shape of photon burst histograms pose significant limitations to the identification of single molecules in micro/nano-fluidic channels, and the nature of these histograms is no...
Three dimensional structure from intensity correlations
Three dimensional structure intensity correlations x-ray dilute ensembles
2011/8/5
Abstract: We develop the analysis of x-ray intensity correlations from dilute ensembles of identical particles in a number of ways. First, we show that the 3D particle structure can be determined if t...
How universal is the Wigner distribution?
Wigner distribution universal Statistical Mechanics
2011/8/17
Abstract: We consider Gaussian ensembles of m N x N complex matrices. We identify an enhanced symmetry in the system and the resultant closed subsector, which is naturally associated with the radial s...
Arbitrary-order Hilbert spectral analysis for time series possessing scaling statistics: a comparison study with detrended fluctuation analysis and wavelet leaders
Arbitrary-order Hilbert spectral analysis time series wavelet leaders
2011/8/5
Abstract: In this paper we present an extended version of Hilbert-Huang transform, namely arbitrary-order Hilbert spectral analysis, to characterize the scale-invariant properties of a time series dir...
Inverse Ising inference using all the data
Inverse Ising inference data logistic regression
2011/8/17
Abstract: We show that a method based on logistic regression, using all the data, solves the inverse Ising problem far better than mean-field calculations relying only on sample pairwise correlation f...
On the Zipf strategy for short-term investments in WIG20 futures
Zipf law econophysics investment strategy long memory time series complex systems futures contracts
2011/8/17
Abstract: We apply the Zipf power law to financial time series of WIG20 index daily changes (open-close). Thanks to the mapping of time series signal into the sequence of 2k+1 'spin-like' states, wher...