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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Signature-based standard basis algorithm under the framework of GVW algorithm
GVW算法框架 基于签名 标准基算法
2023/11/29
The Grobner basis for a zero-dimensional polynomial ideal comprises a univariate polynomial in the least variable. The elimination process in Buchberger's algorithm unnecessarily involves the least va...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Some new algorithm developments on highly stiff stable schemes and on a SAV based approach for optimization problems
高刚性稳定方案 基于SAV 优化方法 新算法发展
2023/11/29
In the first part, I shall present a new way to construct highly stiff stable schemes. Traditional time discretization schemes are usually based on Taylor expansions at $t_{n+\beta}$ with $\beta\in [0...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：全同态加密方案及其应用研究进展
全同态 加密方案 应用研究
2023/4/13
该报告首先介绍格密码安全性分析中带来的数学问题和基于符号推导自动产生可读的分析过程。在此基础上我们初步研究了格密码方案中的参数优化问题。其次，在应用方面设计了面向基因数据的同态计算方案，将其应用于膀胱癌诊断回归模型，以及前列腺癌的神经网络模型。由于理想格上的同态计算大多归结为高次大整数的多项式乘法，我们实现了FPGA硬件上的多项式乘法加速，为将来软硬件结合的大规模隐私计算方案设计奠定了基础。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：基于位置信息的高精度滤波算法
位置信息 高精度 滤波算法
2023/4/13
针对水下攻击武器需要明确目标航向以实现最大作战性能的需求，为发挥探测装置斜距多普勒高精神感知的优势，提出基于斜距多普勒的目标航向估计方法。理论分析表明，以侧向激动和工作时间作为可辨识度衡量指标，可保证目标航向的估计精度。仿真分析结果表明，所提方法可满足交接班的使用需求。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Quantum Algorithms for High-Dimensional Sampling Problems
高维采样 量子算法 高维抽样问题
2023/4/14
High-dimensional sampling problems are ubiquitous in statistics, operations research, machine learning, etc. In this talk, I will introduce quantum algorithms for two important problems in high-dimens...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Efficient algorithms for the anisotropic dendritic crystal models
各向异性 树枝状晶体 有效算法
2023/4/14
We consider numerical approximations of the anisotropic phase-field dendritic crystal growth model. This is a highly complex coupled nonlinear system consisting of the anisotropic Allen-Cahn equation,...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：基于自监督表征学习的图像聚类算法研究
自监督表征学习 图像聚类算法 语义伪标签
2023/4/17
自监督学习可以为图像聚类算法提供良好的表征，但是当表征和聚类同步学习时会存在一些问题。具体来说，基于对比的自监督学习方法通常需要大量的负样本来使得所有样本的表征分离，但是负样本会带来类别冲突，进而影响下游的聚类性能；反之，基于非对比的自监督学习方法虽然避免了类别冲突问题，但是由于缺少负样本，与聚类任务联合优化时容易造成聚类崩溃。本报告将围绕这两个问题，分别介绍基于语义伪标签和原型对比的图像聚类算法...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Twisted generalized Reed-Solomon codes with twists
扭曲 广义 里德-所罗门代码 RS编码
2023/4/25
Twisted generalized Reed-Solomon (TGRS) codes get much attention recently. In this talk, we focus on a class of TGRS codes with general ?? twists. Conditions to be MDS or self-dual are discussed.
操作系统是计算机的核心总控软件，是计算机系统的指挥和管理中心，是计算机系统的灵魂。问世于上世纪60年代的操作系统仍然是计算机领域中最为活跃的学科之一，因而操作系统课程也是计算机专业的一门核心的专业基础课。
云南农业大学计算机导论课件Chapter7 Operating Systems.
Type Systems for Distributed Data Structures.
Parallel programming languages that let multiple processors access shared data provide a variety of sharing mechanisms and memory models. Understanding a language’s support for data sharing behavior i...
Barriers to Black-Box Constructions of Traitor Tracing Systems
two-party computation Secure Multiparty Computation
2015/12/21
Reducibility between different cryptographic primitives is a fundamental problem in modern
cryptography. As one of the primitives, traitor tracing systems help content distributors recover
the ident...
Robust Optimal Control using Polynomial Chaos and Adjoints for Systems with Uncertain Inputs
Robust Optimal Control Polynomial Chaos Adjoints Systems Uncertain Inputs
2015/7/3
The objective of this note is to show how one can combine Polynomial Chaos Expansions(PCE) and adjoint theory to efficiently obtain sensitivities for robust optimal control. A non-intrusive PCE m...
Practical Signal Quality Monitoring for Augmentation Systems
Practical Signal Quality Monitoring Augmentation Systems
2015/6/26
Signal Quality Monitoring (SQM) algorithms propose to detect anomalous GPS signal distortions primarily through the use of multicorrelator SQM receivers. However, currently no augmentation systems (e....