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先验知识与基于核函数的回归方法的融合 总被引:1,自引:0,他引:1
In some sample based regression tasks, the observed samples are quite few or not informative enough. As a result, the conflict between the number of samples and the model complexity emerges, and the regression method will confront the dilemma whether to choose a complex model or not. Incorporating the prior knowledge is a potential solution for this dilemma. In this paper, a sort of the prior knowledge is investigated and a novel method to incorporate it into the kernel based regression scheme is proposed. The proposed prior knowledge based kernel regression (PKBKR) method includes two subproblems: representing the prior knowledge in the function space, and combining this representation and the training samples to obtain the regression function. A greedy algorithm for the representing step and a weighted loss function for the incorporation step are proposed. Finally, experiments are performed to validate the proposed PKBKR method, wherein the results show that the proposed method can achieve relatively high regression performance with appropriate model complexity, especially when the number of samples is small or the observation noise is large. 相似文献
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串级浮选槽液位的稳定性直接影响浮选生产质量,但由于各槽液位变化相互影响,目前现场广泛应用的常规PID控制效果较差。对此,本文提出了一种PID控制器参数整定方法,有效减小了液位调节过程中各槽的相互影响,并辅以一种前馈控制以增加液位调节速度。工业现场试验结果证明了本文所提方法简单易用,并且具有优良的控制性能。 相似文献
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化工园区存在危险品储罐、运输车等众多安全威胁,需要实时感知园区的危险态势,及时发现并排除潜在的安全威胁。传统方法是依靠危险品储罐实时监测等单一数据源进行危险识别,难以满足目前化工园区对安全状态评估的需求。从大数据分析的角度出发,整合化工园区内危险品储罐监测传感器、危险品运输车、地理信息等数据,基于危险品泄漏呈高斯扩散的特点,提出了一种多源异构数据融合的危险识别方法,实现园区的危险态势感知,并实时展示整个化工园区内的潜在危险区域。结合某化工园区的实际数据,验证了所提方法的有效性。 相似文献
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本文针对某一激光制导的炸弹的滚动回路进行控制器设计,介绍了利用角位置,角速度及角加速度测量和反馈实现滚动回路控制的方法,并对所实现的系统,在最大动压和最小动压两个极限情况下进行了分析,结果表明,所设计的控制器具有较好的性能。 相似文献
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