城市轨道交通行业的职业素养,成都地铁基本情况介绍,地铁客运相关岗位职责与典型案例

“一带一路”简介，中老昆万铁路概况； 立足本质岗位，服务国家“一带一路”发展战略个人成长与工作体会

企业文化认知与实践,职业认知

A lift-and-permute scheme of alternating direction method of multipliers (ADMM) is proposed for linearly constrained convex programming. It contains not only the newly developed balanced augmented Lagrangian method and its dual-primal variation, but also the proximal ADMM and Douglas-Rachford splitting algorithm. It helps to propose accelerated algorithms with worst-case $O(1/k^2)$ convergence rates in the case that the objective function to be minimized is strongly convex.

以真实的深层学习案例为切入点，帮助教师认识深层学习，感悟身边深层学习的瞬间，研讨深层学习发生的条件，探索引导学生进行深层学习的策略。

1. 课程思政是什么？ ①《高等学校课程思政建设指导纲要》的解读； ② 基于《纲要》的课程思政实用教学设计工具讲解。 2. 课程思政怎么设计？ 运用课程思政实用教学设计工具开展教学设计的案例分析。 3. 课程思政设计如何实操？ ① 分组与教师发展师配合，开展一次课程思政教学设计实操； ② 展示并解说设计方案。 4. 课程思政如何评价？ ① 自评与互评相结合的课程思政评价体系讲解； ② 根据“评价体系”对本组上一环节设计方案进行评价； ③ 原设计方案改进。

1. Reformulations of nonsmooth nonconvex optimization for training leaky ReLU neural network 2. Penalty methods and a smoothing proximal gradient algorithm 3. Computation of subgradients in stochastic gradient algorithms for nonsmooth nonconvex finite-sum optimization 4. Automatic choroid layer segmentation from OCT images using deep Learning

In this talk, we present a critical mass phenomenon in a chemotaxis model with indirect signal production mechanism. Our first result asserts that for any suitably regular initial data, the system admits global classical solution, which is different from the classical Keller-Segel system with direct signal production mechanism. Our second result confirms that for all radially symmetric initial data smaller than the critical value, the solutions are globally bounded, while for any initial mass larger than the critical value, unbounded global solutions can be constructed.

This talk is devoted to a nonlocal dispersal logistic model with seasonal succession and free boundaries, where the free boundaries represent the expanding front and the seasonal succession accounts for the effect of two different seasons. Technically, this free boundary problem is much more difficult than the case without seasonal succession since the coefficients are all time periodic and piecewise continuous. We prove the existence and uniqueness of global solution, and then examine the long-time dynamical behaviour and the criteria that completely determine when spreading and vanishing can happen, revealing some significant differences from the model without seasonal succession. Moreover, we use a “thin-tail” condition on the kernel function to estimate the asymptotic spreading speed, which is achieved by solving the associated semi-wave problem.

光滑线性化是动力系统研究中的重要理论，它能刻画一个非线性系统的轨道结构在多大程度上被其线性部分所决定。上世纪50-60年代，Hartman- Grobman和Sternberg分别给出了C^0和C^r线性化的著名结果。然而，他们要么得到的线性化光滑度过低，要么要求的条件过高。因此，在经典结果中减弱条件，并同时提高线性化的光滑度便成为后来学者们不断追求的目标。这其中，C^1线性化具有特别重要的意义，不仅因为其有最低的光滑度，还因为其在确定特征方向和保持分岔参数等重要问题中有广泛应用。在本次报告中，我们将介绍双曲系统C1线性化的若干最新进展，包括最佳光滑性和弱谱条件等问题，以及经典结果在无穷维，随机和非自治情形中的推广。我们将涉及到不变流形、不变叶层、不变分布、Whitney扩张定理和光滑正规形等理论工具。