这项工作是通过制定非负稀疏信号恢复 (SSR) 问题和开发非负稀疏贝叶斯学习 (NNSBL) 算法来解决稀疏数组的源定位问题。 1.在'NNSBL.m'中给出了所提出的算法,在'Conven_SBL.m'中给出了传统的SBL算法以进行比较。 2. 'MRA_output.m' 用于生成阵列输出数据,'Peaksearch.m' 和'peak_find.m' 用于查找空间谱中的峰值位置。 3. 'Main_Simulation.m' 用于显示空间谱。 4. 'rmse_snr.m' 用于显示 DOA 估计与 SNR 的 RMSE。 5. 'rmse_snapshot.m' 用于显示 DOA 估计的 RMSE 与快照数量的关系。
2022-06-13 10:20:35 9KB matlab
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【IEEE ICASSP 2022教程】非负矩阵分解的最新进展,266页ppt 自Paatero & Tapper(1994)和Lee & Seung(1999)的开创性著作引入非负矩阵分解(NMF)以来,已经过去了二十多年。此后,NMF在音频源分离、高光谱解混、用户推荐、文本信息检索、生物识别、网络分析等多个领域产生了重大影响。虽然更复杂的体系结构,比如神经网络,在一些有监督的情况下可以胜过因子分解模型,但是NMF是基于一种生成和可解释的模型,在许多情况下,这仍然是一种流行的选择,特别是对于不需要或只需要很少的训练数据的任务(例如:在无监督设置)。本教程旨在回顾过去十年在NMF方面的一些最重要的进展,重点关注NMF优化方面的最新进展(包括最先进的算法,如最大化-最小化,收敛特性,大规模实现,稀疏和时间正则化),NMF的模型选择(包括选择合适的拟合测度、秩估计)和最近的NMF扩展(包括存在异常值时的稳健NMF、可分离的NMF、正半定矩阵分解、基于NMF的排序模型)。本教程将针对没有NMF经验的初学者和在其更高级的材料中更有知识的从业者。
2022-05-29 12:05:01 13.57MB 文档资料
本文件是论文《Tag-Aware Personalized Recommendation Using a Deep-Semantic Similarity Model with Negative Sampling》的原文翻译,是我通过 Google 翻译及我自己的理解翻译而来的。在翻译的内容中有很多英文标记的地方,便于结合原文进行理解。感谢论文原作者的辛苦实践,/bq,如有侵权,请联系我删除,谢谢~/bq。 [摘要] With the rapid growth of social tagging systems, many efforts have been put on tag-aware personalized recommendation. However, due to uncontrolled vocabularies, social tags are usually redundant, sparse, and ambiguous. In this paper, we propose a deep neural network approach to solve this problem by mapping both the tag-based user and item profiles to an abstract deep feature space, where the deepsemantic similarities between users and their target items (resp., irrelevant items) are maximized (resp., minimized). Due to huge numbers of online items, the training of this model is usually computationally expensive in the real-world context. Therefore, we introduce negative sampling, which significantly increases the model’s training efficiency (109.6 times quicker) and ensures the scalability in practice. Experimental results show that our model can significantly outperform the state-of-the-art baselines in tag-aware personalized recommendation: e.g., its mean reciprocal rank is between 5.7 and 16.5 times better than the baselines.
2022-05-15 10:33:23 295KB 推荐系统 negative samplin
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K-SVD是一种经典的字典训练算法,依据误差最小原则,对误差项进行SVD分解,选择使误差最小的分解项作为更新的字典原子和对应的原子系数,经过不断的迭代从而得到优化的解。
2022-05-05 19:13:30 321KB ksvd 稀疏表示
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英文的词向量 GoogleNews-vectors-negative300.bin网盘 GoogleNews-vectors-negative300.bin网盘
2022-04-26 02:32:30 75B GoogleNews word_vector
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MahNMF Manhattan Non-negative Matrix Factorization code % Manhattan Non-negative Matrix Factorization. % ManhNMF: Matlab Code for Efficient Robust Manhattan NMF Solver % Reference % [1] N. Guan, D. Tao, Z. Luo, and J. Shawe-taylor, "MahNMF: Manhattan % Non-negative Matrix Factorization," arXiv:1207.3438v1, 2012. % [2] N. Guan, D. Tao, Z. Luo, and J. Shawe-taylor, "MahNMF: Manhattan % Non-negative Matrix Factorization," Submitted to Journal of Machine Learning Research, 2013. % The model is X \approx W^TH, where X, W, and H are defined as follows: % X (m x n): data matrix including n samples in m-dimensional space; % W (r x m): basis matrix including r bases in m-dimensional space; % H (r x n): coefficients matrix includeing n encodings in r-dimensional space. % Written by Naiyang Guan (ny.guan@gmail.com) % Copyright 2012-2014 by Naiyang Guan and Dacheng Tao % Modified at Jan. 28 2013 % % X : Input data matrix (m x n) % r : Target low-rank % % (Below are optional arguments: can be set by providing name-value pairs) % MAX_ITER : Maximum number of iterations. Default is 1,000. % MIN_ITER : Minimum number of iterations. Default is 10. % MAX_TIME : Maximum amount of time in seconds. Default is 100,000. % W_INIT : (m x r) initial value for W. % H_INIT : (r x n) initial value for H. % LAM_INIT : initial value of smoothness parameter. Default is 1. % MDL_TYPE : Model type (Default is 'PLAIN'), % 'PLAIN' - MahNMF (min{||X-W^T*H||_1,s.t.,W >= 0 and H >= 0}.), % 'BXC' - Box Constrained MahNMF (min{||X-W^T*H||_1,s.t.,1 >= W >= 0 and 1 >= H >= 0}.), % 'MNR' - Manifold Regularized MahNMF % (min{||X-W^T*H||_1+.5*beta*TR(H*Lp*H^T),s.t.,W >= 0 and H >= 0}.), % 'GSP' - Group Sparse MahNMF % (min{||X-W^T*H||_1+.5*beta*\sum_{g\in G}||W^[g]||_{1,p},s.t.,W >= 0 and H >= 0}.), % 'SYM' - Symmetric MahNMF (min{||X-H*H^T||_1,s.t., H >= 0}.). % ALG_TYPE : Algorithm type (Default is 'AGD'), % 'AGD' - Accelerated Gradient Descent, % 'RRI' - Rank-one Residue Iteration. % BETA : Tradeoff parameter over regularization term. Default is 1e-3. % SIM_MTX : Similarity matrix constructed by 'constructW'. % GPP_MTX : Group pattern for boundary of all groups. % TOL_INNR : Stopping tolerance of inner iterations. Default is 1e-2. % TOL_OUTR : Stopping tolerance of outer iterations. Default is 1e-3. % If you want to obtain a more accurate solution, decrease TOL_INNR or TOL_OUTR and increase MAX_ITER at the same time. % VB_OUTR : 0 (default) - No debugging information is collected. % 1 (debugging purpose) - History of computation is returned by 'HIS' variable. % 2 (debugging purpose) - History of computation is additionally printed on screen. % VB_INNR : 0 (default) - No debugging information is collected. % 1 (debugging purpose) - History of computation is returned by 'HIS' variable. % 2 (debugging purpose) - History of computation is additionally printed on screen. % % W : Obtained basis matrix (r x m). % H : Obtained coefficients matrix (r x n). % iter : Number of iterations. % elapse : CPU time in seconds. % HIS : (debugging purpose) History of computation, % niter - total iteration number spent for Nesterov's optimal % gradient method, % cpus - CPU seconds at iteration rounds, % objf - objective function values at iteration rounds, % dlta - stopping criteria of block coordinate descent. % % % >>X=rand(1000,500); % >>ManhNMF(X,10); % >>ManhNMF(X,20,'verbose',1); % >>ManhNMF(X,30,'verbose',2,'w_init',rand(r,m)); % >>ManhNMF(X,5,'verbose',2,'tol_outr',1e-5); % Note: other files 'GetStopCriterion.m', 'ApproxFunC.m', and 'wmedianf.mexw32' should be included under the same % directory as this code.
2022-03-23 20:35:03 29KB MahNMF MahNMF code
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非负矩阵分解(NMF)被证明是一种非常有效的分解方法,可用于数据分析中的降维,并且已广泛应用于计算机视觉,模式识别和信息检索中。 但是,NMF实际上是一种不受监督的方法,因为它无法利用有关数据的先验知识。 在本文中,我们提出了使用图拉普拉斯算子(CNMF-GL)进行约束的非负矩阵分解,该方法不仅利用了几何信息,而且还适当地使用了标签信息来增强NMF。 具体来说,我们期望图的正则化项能够保留原始数据的局部结构,同时具有相同标签和具有不同标签的数据点将具有相应的约束条件。 结果,学习的表示将具有更大的辨别力。 图像聚类的实验结果证明了该算法的有效性。
2022-02-27 19:53:22 282KB Non-negative matrix factorization ·
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Algorithms for Non-negative Matrix Factorization
2022-01-17 16:00:19 1.07MB NMF
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团队简介 大家好,我们是金融情报信息决定赛道的葫芦娃团队,本赛题的队伍成员均来自哈工大深圳的人类自然语言技术(HLT)小组,成员包括刘宇瀚,李嘉明,殷熔磾,刘道兴以及袁朝发。指导老师为徐睿峰教授。 方案分享 我们进行以下六点进行介绍 首先是任务简介与数据格式,具体的数据下载详见,也可以data文件夹里面的数据 整个数据存在一下的特征: 我们的整体方案流程如下: 数据集构造部分,我们按照如下形式构造,即内部实体级情感分类任务 数据预先部分我们采用如下操作: 为了更好学习到语料的信息,我们对语言模型在本数据集上又进行一次预训练 之后我们采用
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养殖环境下恢复前草鱼图像“负样本”
2021-12-16 18:37:26 157.96MB 数据集
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