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    • 2. 发明授权
    • Systems and methods for new time series model probabilistic ARMA
    • 新时间序列模型概率ARMA的系统和方法
    • US07580813B2
    • 2009-08-25
    • US10463145
    • 2003-06-17
    • Bo ThiessonChristopher A. MeekDavid M. ChickeringDavid E. Heckerman
    • Bo ThiessonChristopher A. MeekDavid M. ChickeringDavid E. Heckerman
    • G06F17/50G05B23/02
    • G06F17/18
    • The present invention utilizes a cross-prediction scheme to predict values of discrete and continuous time observation data, wherein conditional variance of each continuous time tube variable is fixed to a small positive value. By allowing cross-predictions in an ARMA based model, values of continuous and discrete observations in a time series are accurately predicted. The present invention accomplishes this by extending an ARMA model such that a first time series “tube” is utilized to facilitate or “cross-predict” values in a second time series tube to form an “ARMAxp” model. In general, in the ARMAxp model, the distribution of each continuous variable is a decision graph having splits only on discrete variables and having linear regressions with continuous regressors at all leaves, and the distribution of each discrete variable is a decision graph having splits only on discrete variables and having additional distributions at all leaves.
    • 本发明利用交叉预测方案来预测离散和连续时间观测数据的值,其中每个连续时间管变量的条件方差固定为小的正值。 通过在基于ARMA的模型中允许交叉预测,可以准确预测时间序列中连续和离散观测值。 本发明通过扩展ARMA模型来实现这一目的,使得第一时间序列“管”用于促进或“交叉预测”第二时间序列管中的值以形成“ARMAxp”模型。 一般来说,在ARMAxp模型中,每个连续变量的分布是仅在离散变量上分裂并具有在所有叶上具有连续回归的线性回归的决策图,并且每个离散变量的分布是仅分解为 离散变量,并在所有叶子上具有额外的分布。
    • 3. 发明授权
    • Systems and methods for discriminative density model selection
    • 用于区分密度模型选择的系统和方法
    • US07548856B2
    • 2009-06-16
    • US10441470
    • 2003-05-20
    • Bo ThiessonChristopher A. Meek
    • Bo ThiessonChristopher A. Meek
    • G10L15/06
    • G06K9/6226G06K9/6296G10L15/08
    • The present invention utilizes a discriminative density model selection method to provide an optimized density model subset employable in constructing a classifier. By allowing multiple alternative density models to be considered for each class in a multi-class classification system and then developing an optimal configuration comprised of a single density model for each class, the classifier can be tuned to exhibit a desired characteristic such as, for example, high classification accuracy, low cost, and/or a balance of both. In one instance of the present invention, error graph, junction tree, and min-sum propagation algorithms are utilized to obtain an optimization from discriminatively selected density models.
    • 本发明利用鉴别密度模型选择方法来提供可用于构建分类器的优化密度模型子集。 通过允许在多类分类系统中为每个类别考虑多个替代密度模型,然后开发由每个类别的单个密度模型组成的最佳配置,分类器可以被调谐以呈现期望的特性,例如 ,分类精度高,成本低,和/或两者的平衡。 在本发明的一个实例中,使用误差图,结树和最小和传播算法来从区分选择的密度模型中获得优化。
    • 4. 发明授权
    • Systems and methods for adaptive handwriting recognition
    • 自适应手写识别的系统和方法
    • US07460712B2
    • 2008-12-02
    • US11672458
    • 2007-02-07
    • Bo ThiessonChristopher A. Meek
    • Bo ThiessonChristopher A. Meek
    • G06K9/00G06K9/62
    • G06K9/6292G06K9/222
    • The present invention utilizes generic and user-specific features of handwriting samples to provide adaptive handwriting recognition with a minimum level of user-specific enrollment data. By allowing generic and user-specific classifiers to facilitate in a recognition process, the features of a specific user's handwriting can be exploited to quickly ascertain characteristics of handwriting characters not yet entered by the user. Thus, new characters can be recognized without requiring a user to first enter that character as enrollment or “training” data. In one instance of the present invention, processing of generic features is accomplished by a generic classifier trained on multiple users. In another instance of the present invention, a user-specific classifier is employed to modify a generic classifier's classification as required to provide user-specific handwriting recognition.
    • 本发明利用手写样本的通用和用户特定的特征来提供具有最低级别的用户特定注册数据的自适应手写识别。 通过允许通用和用户特定的分类器便于识别过程,可以利用特定用户手写的特征来快速确定用户尚未输入的手写字符的特征。 因此,可以识别新的字符,而不需要用户首先将该字符输入作为注册或“训练”数据。 在本发明的一个实例中,通用特征的处理由对多个用户进行训练的通用分类器来完成。 在本发明的另一个实例中,使用用户特定的分类器根据需要修改通用分类器的分类以提供用户特定的手写识别。
    • 7. 发明授权
    • Mixtures of Bayesian networks
    • 贝叶斯网络的混合
    • US06807537B1
    • 2004-10-19
    • US08985114
    • 1997-12-04
    • Bo ThiessonChristopher A. MeekDavid Maxwell ChickeringDavid Earl Heckerman
    • Bo ThiessonChristopher A. MeekDavid Maxwell ChickeringDavid Earl Heckerman
    • G06N302
    • G06K9/6296G06N5/025Y10S707/99945Y10S707/99948
    • One aspect of the invention is the construction of mixtures of Bayesian networks. Another aspect of the invention is the use of such mixtures of Bayesian networks to perform inferencing. A mixture of Bayesian networks (MBN) consists of plural hypothesis-specific Bayesian networks (HSBNs) having possibly hidden and observed variables. A common external hidden variable is associated with the MBN, but is not included in any of the HSBNs. The number of HSBNs in the MBN corresponds to the number of states of the common external hidden variable, and each HSBN is based upon the hypothesis that the common external hidden variable is in a corresponding one of those states. In one mode of the invention, the MBN having the highest MBN score is selected for use in performing inferencing. In another mode of the invention, some or all of the MBNs are retained as a collection of MBNs which perform inferencing in parallel, their outputs being weighted in accordance with the corresponding MBN scores and the MBN collection output being the weighted sum of all the MBN outputs. In one application of the invention, collaborative filtering may be performed by defining the observed variables to be choices made among a sample of users and the hidden variables to be the preferences of those users.
    • 本发明的一个方面是构建贝叶斯网络的混合物。 本发明的另一方面是使用贝叶斯网络的这种混合来执行推理。 贝叶斯网络(MBN)的混合由多个具有隐藏和观察变量的假设特定贝叶斯网络(HSBN)组成。 常见的外部隐藏变量与MBN相关联,但不包括在任何HSBN中。 MBN中的HSBN的数量对应于公共外部隐藏变量的状态数,并且每个HSBN基于公共外部隐藏变量在这些状态中的相应一个状态中的假设。 在本发明的一种模式中,选择具有最高MBN分数的MBN用于执行推定。 在本发明的另一模式中,一些或所有MBN被保留为并行执行推论的MBN的集合,其输出根据相应的MBN分数加权,并且MBN收集输出是所有MBN的加权和 输出。 在本发明的一个应用中,可以通过将观察到的变量定义为在用户样本中作出的选择和作为这些用户的偏好的隐藏变量来执行协同过滤。
    • 9. 发明授权
    • Efficient gradient computation for conditional Gaussian graphical models
    • 条件高斯图形模型的有效梯度计算
    • US07596475B2
    • 2009-09-29
    • US11005148
    • 2004-12-06
    • Bo ThiessonChristopher A. Meek
    • Bo ThiessonChristopher A. Meek
    • G06F17/10G06F15/18G06E3/00
    • G06K9/6296
    • The subject invention leverages standard probabilistic inference techniques to determine a log-likelihood for a conditional Gaussian graphical model of a data set with at least one continuous variable and with data not observed for at least one of the variables. This provides an efficient means to compute gradients for CG models with continuous variables and incomplete data observations. The subject invention allows gradient-based optimization processes to employ gradients to iteratively adapt parameters of models in order to improve incomplete data log-likelihoods and identify maximum likelihood estimates (MLE) and/or local maxima of the incomplete data log-likelihoods. Conditional Gaussian local gradients along with conditional multinomial local gradients determined by the subject invention can be utilized to facilitate in providing parameter gradients for full conditional Gaussian models.
    • 本发明利用标准概率推理技术来确定具有至少一个连续变量的数据集的条件高斯图形模型的对数似然,并且对于至少一个变量未观察到数据。 这为用于连续变量和不完整数据观察的CG模型计算梯度提供了有效手段。 本发明允许基于梯度的优化过程使用梯度来迭代地适应模型的参数,以便改进不完整的数据对数似然性并且识别不完全数据对数似然性的最大似然估计(MLE)和/或局部最大值。 条件高斯局部梯度以及由本发明确定的条件多项式局部梯度可以用于促进为全条件高斯模型提供参数梯度。