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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：语音技术的前沿进展及百度产业实践
语音技术 前沿进展 百度产业实践
2023/4/28
随着深度学习和通用GPU算力的快速提升，语音技术特别是语音识别技术逐渐伴随车载语音交互、家庭智能音箱等形式走进千家万户。本次讲座首先回顾语音识别的技术进展，介绍最新的端到端语音识别技术，然后分享百度在语音技术上的一些突破。希望能够通过此次报告让大家了解语音技术的基本组成和技术路线，以及产业界在语音技术上的各类应用和进展。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Bayesian Approach to Determining the Orientation of Sound-soft Obstacles with Phaseless Data via Wasserstein Distance
Wasserstein距离 贝叶斯方法 无相数据 软声障碍物
2023/4/27
We present a Bayesian approach to inverse scattering problems of reconstructing the rotation angle in clockwise direction of an acoustically sound-soft obstacle from phaseless far-field data in two di...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Resolvent problem for linearized compressible Navier-Stokes equations with free surface
自由曲面 线性可压缩 纳维-斯托克斯方程 解问题
2023/4/28
In this talk, we will discuss the resolvent problem for the linearized one of the free surface problem of compressible, viscous and heat-conducting fluid, which is a problem in an infinite strip domai...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Markov decision process and reinforcement learning for intelligent
智能 马尔可夫 决策过程 强化学习
2023/4/28
本次讲座主要针对智能运维中的建模优化问题。首先基于前期研究，我将讨论基于马尔可夫决策过程的有限周期的视情维护策略。考虑二元件系统以及系统元件的退化过程具有随机相关性，用二元伽马过程来描述系统退化过程。系统元件服从周期性检测，当元件的退化程度超过预防性维护阈值时，其会被替换。该维护问题可以表示成马尔可夫决策过程并可用动态规划来求解。不同于无限周期的维护策略，有限周期的最优策略是动态的，其在每次检测都...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：A decoupled, linear, and unconditionally energy stable finite element method for a two-phase ferrohydrodynamics model
两相铁 流体动力学模型 无条件能量稳定 有限元方法
2023/4/28
In this talk, we present numerical approximations of a phase-field model for two-phase ferrofluids, which consists of the Navier-Stokes equations, the Cahn-Hilliard equation, the magnetostatic equatio...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Markov decision process and reinforcement learning for intelligent operation and maintenance
智能 马尔可夫 决策过程 强化学习
2023/4/28
本次讲座主要针对智能运维中的建模优化问题。首先基于前期研究，我将讨论基于马尔可夫决策过程的有限周期的视情维护策略。考虑二元件系统以及系统元件的退化过程具有随机相关性，用二元伽马过程来描述系统退化过程。系统元件服从周期性检测，当元件的退化程度超过预防性维护阈值时，其会被替换。该维护问题可以表示成马尔可夫决策过程并可用动态规划来求解。不同于无限周期的维护策略，有限周期的最优策略是动态的，其在每次检测都...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Some progress on steady Navier-Stokes system in a channel
通道 稳定 纳维-斯托克斯系统
2023/4/27
In this talk, we will discuss some recent progress on steady Navier-Stokes system in a channel, in particular, the problem posed by Leray on steady flows in channels. The existence and uniqueness of s...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Condensation in deep learning
深度学习 凝结 神经网络
2023/4/28
Why do neural networks (NN) that look so complex usually generalize well? To understand this problem, we find some simple implicit regularizations during training NNs. The first is the frequency princ...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：基于深度学习的图像修复
深度学习 图像修复 计算机图形学
2023/4/28
图像修复是计算机图形学与计算机视觉领域交叉的重要研究问题，在文物修复、数字取证、虚拟场景编辑、影视特效制作等领域具有重要的应用价值。图像修复的目标是用语义合理且视觉逼真的内容填充缺失区域，同时也与图像的剩余部分保持一致。本报告描述图像修复的研究进展，重点展示我们在图像修复问题的三个近期研究工作，以及探讨未来的研究工作。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：人工智能中的点云配准问题研究
人工智能 点云配准问题 计算机图形学
2023/4/28
点云配准是计算机图形学和计算机视觉等人工智能领域的基本重要问题，在CAD、三维重建、文物修复、自动驾驶等任务上具有广泛应用。随着传感器装置的日益普及，点云配准问题愈发受到关注。点云配准的目标是求解不同视角下传感器获取数据的最优空间变换。本报告将首先介绍我们最近基于图信号处理理论和刚体动力学提出的新型点云配准方法，然后简要介绍我们在深度点云法向估计任务上的一些探索，这将为点云配准问题提供更丰富的几何...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：A two-stage physics-informed neural network method based on conserved quantities and applications in localized wave solutions
守恒量 两阶段物理信息 神经网络方法 局部波解
2023/5/5
With the advantages of fast calculating speed and high precision, the physics-informed neural network method opens up a new approach for numerically solving nonlinear partial differential equations. B...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Dispersive estimates for the inviscid rotating stratified Boussinesq equations in the stratification-dominant three-scale limit
三尺度极限 无粘性旋转分层 Boussinesq方程 色散估计
2023/5/5
A dispersive decay estimate is proven for the linear propagator of the three-scale rotating stratified Boussinesq equations in the stratification-dominant regime. Because the phase function of that pr...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars： Dispersive estimates for the inviscid rotating stratified Boussinesq equations in the stratification-dominant three-scale limit
分层主导 三尺度极限 无粘性旋转分层 Boussinesq方程 色散估计
2023/5/5
A dispersive decay estimate is proven for the linear propagator of the three-scale rotating stratified Boussinesq equations in the stratification-dominant regime. Because the phase function of that pr...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Large scale device simulations
大规模 设备 仿真
2023/5/5
As the device size shrinks to nanosize scale, the quantum mechanical effect and atomic level fluctuations become important. The traditional TCAD based on continuous medium model will no longer work. T...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：基于高精度地震处理的综合随钻精准卡层及风险评估技术
高精度地震处理 综合随钻 精准卡层 风险评估技术
2023/5/5
随着油气勘探深度从浅层向超深层发展、勘探目标从常规构造油气藏转向复杂油气藏，导致油气藏勘探的难度越来越大。现如今超深层复杂油气藏油气勘探中存在着如下问题：钻前预测、钻中跟踪难度大以及储层评价准确度低。基于上述问题，本报告将针对如何提高钻前预测及钻中跟踪效果，介绍一些基于地震高精度处理的综合随钻卡层及风险评估技术。这些技术包括：钻前高精度地层识别技术、地震随钻预测技术以及储层精准评价技术。将这些先进...
