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多孔介质中含溶解反应的互溶驱替过程格子Boltzmann研究
多孔介质 互溶驱替 溶解反应 格子Boltzmann方法
2022/3/30
为了研究粗糙岩体裂隙渗流–溶解耦合作用机制,根据分段线性法构建粗糙裂隙面,并采用分形维数对其粗糙程度进行表征。基于格子Boltzmann方法,采用双分布函数分别模拟速度场和浓度场的演化过程,假定裂隙表面处的溶解作用满足一阶动力学反应模型,建立基于岩体裂隙表面反应的格子Boltzmann渗流–溶解耦合模型,并结合2个经典算例验证其有效性。最后,讨论分形维数、Pe数和Da数等因素对粗糙裂隙渗流–溶解耦...
结合页岩扫描电镜图像,提出页岩气藏物理模型,采用表征单元体积(representative elementaryvolume, REV) 尺度格子Boltzmann 方法,考虑滑脱效应,模拟页岩气在页岩气藏中的流动. 模拟结果表明,页岩气主要沿着天然裂缝窜进,但在有机质和无机质中也存在缓慢的流动,且有机质中的流速要略大于无机质中的流速. 通过改变地层压力,研究地层压力对页岩气渗流特性的影响. 研究...
Sentiment-Aspect Extraction based on Restricted Boltzmann Machines
Sentiment-Aspect Extraction Restricted Boltzmann Machines
2016/1/22
Aspect extraction and sentiment analysis of reviews are both important tasks in opinion mining. We propose a novel senti-mentandaspectextractionmodelbasedon Restricted Boltzmann Machines to jointly ad...
相分离过程的离散Boltzmann方法研究进展
相分离 离散Boltzmann方法 非平衡效应 相畴增长
2016/11/1
概述相分离过程的离散Boltzmann方法研究进展.这部分研究内容,根据系统的成分,可分为单介质的两相分离和多介质的相分离;根据物理建模,可分为基于传统流体模型的LBM(lattice Boltzmannmethod)数值模拟和相分离系统的动理学建模与模拟;根据研究的侧重点,可分为方法(模型)研究和相分离过程研究.离散Boltzmann模拟所提供的非平衡行为特征为区分相分离的两个不同阶段提供了一个...
A FAST SPECTRAL ALGORITHM FOR THE QUANTUM BOLTZMANN COLLISION OPERATOR
Quantum Boltzmann equation fast spectral method
2015/7/14
This paper introduces a fast spectral algorithm for the quantum Boltzmann collision operator. In the usual spectral framework, one of the terms in the operator cannot be evaluatedefficiently. The new ...
A FAST ALGORITHM FOR THE ENERGY SPACE BOSON BOLTZMANN COLLISION OPERATOR
Quantum Boltzmann equation energy space boson Boltzmann equation recursive domain decomposition double convolution fast Fourier transform
2015/7/14
This paper introduces a fast algorithm for the energy space boson Boltzmann collision operator. Compared to the direct O(N3) calculation and the previous O(N2 log N) method [Markowich and Pareschi, 20...
Calculating the effective permeability of sandstone with multiscale lattice Boltzmann/finite element simulations
Finite elements Lattice Boltzmann Multiscale simulation Porous media Synchrotron microtomography Upscaling
2015/7/1
The lattice Boltzmann (LB) method is an efficient technique for simulating fluid flow through individual pores of complex porous media. The ease with which the LB method handles complex boundary condi...
基于格子Boltzmann方法的页岩气微观流动模拟
格子Boltzmann方法 页岩气 纳米孔隙 微尺度效应 非理想气体
2015/11/16
页岩中的主要孔隙类型是纳米孔隙,气体在纳米孔隙中的流动不同于在常规孔隙中的流动,其存在微尺度效应,因此基于连续介质假设的达西方程不再适用。由于页岩气藏一般处于高压环境,气体比较稠密,理想气体状态方程也不再适用。而格子Boltzmann方法是一种介观流动模拟方法,其不基于连续介质假设,适用于从滑移区到过渡区的气体流动模拟,并且能够考虑气体稠密性和非理想气体状态方程的影响。基于考虑努森层影响和微尺度效...
Boltzmann and the art of flying.
Resource Configurable Spoken Query Detection Using Deep Boltzmann Machines
spoken query detection posteriorgram
2015/3/9
Resource Configurable Spoken Query Detection Using Deep Boltzmann Machines.
First Attempt of Boltzmann Machines for Speaker Verification
Boltzmann Machines Speaker Verification
2015/3/9
Frequently organized by NIST1
, Speaker Recognition
evaluations (SRE) show high accuracy rates. This
demonstrates that this field of research is mature. The
latest progresses came from the prop...
Landau damping of spin waves in trapped Boltzmann gases
Ultracold gas boltzmann spatial dependence
2014/12/20
A semiclassical method is used to study Landau damping of transverse pseudo-spin waves in harmonically trapped ultracold gases in the collisionless Boltzmann limit. In this approach, the time evolutio...