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The Dynamic Phase Transition for Decoding Algorithms
Error correction coding the random structure random graph random arrangement
2015/8/21
The state-of-the-art error correcting codes are based on large random constructions (random graphs, random permutations, . . . ) and are decoded by linear-time iterative algorithms. Because of these f...
Tight bounds for LDPC and LDGM codes under MAP decoding
Conditional entropy Low Density Parity Check Codes Maximum A Posteriori probability decoding Spin glasses Statistical physics
2015/8/21
A new method for analyzing low density parity check (LDPC) codes and low density generator matrix (LDGM) codes under bit maximum a posteriori probability (MAP) decoding is introduced. The method is ba...
Approximate analysis of search algorithms with “physical” methods
Statistical physics analysis of algorithms stochastic input the physical concept
2015/8/20
An overview of some methods of statistical physics applied to the analysis of algorithms for optimization problems (satisfiability of Boolean constraints, vertex cover of graphs, decoding, ...) with d...
What can we see from Investment Simulation based on Generalized (m,2)-Zipf law?
eneralized Zipf law time series fluctuations investment
2015/8/5
The paper revisits the investment simulation based on strategies exhibited by Generalized (m,2)-Zipf law to present an interesting characterization of the wildness in financial time series. The invest...
PREDICTION OF BIODIVERSITY - CORRELATION OF REMOTE SENSING DATA WITH LICHEN FIELD SAMPLES
Orthoimage Modelling Land Cover Prediction Correlation High resolution Segmentation Environment
2015/7/29
The objective of the present study was to develop a model to predict lichen species richness for six test sites in the Swiss Pre-Alps
following a gradient of land use intensity combining airborne re...
Review of the Book “Quantum Enigma - Physics Encounters Consciousness”
quantum enigma consciousness measurement problem
2015/7/29
By explicitly discussing the connections between quantum mechanics and consciousness and bravely using the book containing these discussions as course material for students, the authors show the reade...
Physical vs. numerical dispersion in nonhydrostatic ocean modeling
Dispersion Nonhydrostatic effects Internal waves Ocean modeling Grid resolution requirements Leptic ratio Lepticity
2015/6/30
Many large-scale simulations of internal waves are computed with ocean models solving the primitive (hydrostatic) equations. Under certain circumstances, however, internal waves can represent a dynami...
弯曲通道长度及倾斜角度对雷电电磁场影响研究
雷电电磁场 弯曲放电通道 地表电磁场 脉冲函数
2017/1/17
为了得到弯曲通道雷电电磁脉冲场的分布特性，将电流微源偶极子进行水平分解和垂直分解，利用偶极子法对弯曲通道产生电磁场的表达式进行了推导.在此基础上就底部回击通道长度以及上部回击通道倾斜角度对地表电磁场的影响规律进行了相关研究.研究结果表明，弯曲通道的电磁场峰值主要取决于底部放电通道的长度，在中间场和远场区底部通道越长对应的电磁场幅值越小；而倾斜角度对近场区电磁场影响极小，在中间场和远场区电磁场幅值会...
分离压对波状基底上活性剂液滴铺展过程的影响
活性剂液滴 铺展 分离压 不平整基底
2018/12/27
针对波状基底上含不溶性活性剂液滴的铺展过程,引入受活性剂浓度影响的分离压模型,应用润滑理论建立了液滴高度和活性剂浓度演化方程组,通过数值计算方法得到了分离压作用下含活性剂液滴过程的演化特征. 研究表明:分离压作用下的液滴演化时间显著缩短,铺展速率加快,铺展前沿处衍生出的子波结构明显减少,铺展更加稳定;分离压对液滴铺展稳定性的影响与活性剂关联强度密切相关,减小引力强度系数α1有利于促进液滴的铺展,而...
文章涉及现代物理学一些前沿而基础性问题，主要是针对相对论而展开的物理理论探索。在质疑相对论的同时，在经典物理理论的基础上构建了新的物理理论体系，并用新理论对一些著名的且在科学发展史上具有重大影响的实验观测计行分析和计算，结果理论计算值与资料公布的实验观测值高度吻合，如新理论用光速可变观计算出的GPS卫星上的原子钟比地面上的原子钟每天快38.6微秒,与资料公布的实验值完全一致.新理论还对牛顿理论进行...
ELECTROWEAK CORRECTIONS TO PARITY-VIOLATING NEUTRAL CURRENT SCATTERING
Resonance weak neutral axis vector transitional form axial vector electroweak radiation elastic electron scattering
2014/12/23
We analyze the degree to which parity-violating (PV) electroexcitation of the Δ(1232) resonance may be used to extract the weak neutral axial vector transition form factors. We find that the axial vec...
We investigate the possibility of having horizons inside various classical field configurations. Using the implicit function theorem, we show that models satisfying a certian set of criteria allow for...
Cosmological multi-black-hole solutions
Einstein Maxwell equation the charged black holes time and space actively the cosmological constant a black hole
2014/12/23
We present simple, analytic solutions to the Einstein-Maxwell equation, which describe an arbitrary number of charged black holes in a spacetime with a positive cosmological constant Λ. In the limit Λ...
Chiral Symmetry and Electroweak pi,K, n Processes
Chiral perturbation theory the low energy electroweak symmetry goldstone boson
2014/12/23
Recently the development of chiral perturbation theory has allowed the generation of rigorous low-energy theorems for various hadronic processes based only on the chiral invariance of the underlying Q...
PHOTON-PHOTON SCATTERING, PION POLARIZABILITY, AND CHIRAL-SYMMETRY
Meson polarizability dispersion relations chiral perturbation theory expert at low amplitude decentralized processing
2014/12/23
Recent attempts to detect the pion polarizability via analysis of γγ→ππ measurements are examined. The connection between calculations based on dispersion relations and on chiral perturbation theory i...