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特征值法在坐标测量机三维探测误差计算中的应用
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作者 李品 《价值工程》 2020年第24期242-243,共2页
坐标测量机是在现代智能制造行业中广泛应用的几何量测量设备。最大允许探测误差MPEP是评价坐标测量机测量精度的一项重要指标。在设备验收检测和复检检测工作中,设备的三维探测误差P(Probing Error)应不超过设备标明的最大允许探测误差... 坐标测量机是在现代智能制造行业中广泛应用的几何量测量设备。最大允许探测误差MPEP是评价坐标测量机测量精度的一项重要指标。在设备验收检测和复检检测工作中,设备的三维探测误差P(Probing Error)应不超过设备标明的最大允许探测误差MPEP。因此,对于三维探测误差的可靠的校准测量,以及科学高效的数据处理具有重要的意义。文章对三维探测误差的计算方法从一种新型的数学模型出发,使用特征值法来实现三维探测误差校准测量原始记录数据的计算,为三维探测误差的校准测量提供理论和实践的参考。 展开更多
关键词 三维探测误差 特征 二次型最值
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THE MAXIMUM PRINCIPLE FOR PARTIALLY OBSERVED OPTIMAL CONTROL OF FORWARD-BACKWARD STOCHASTIC SYSTEMS WITH RANDOM JUMPS 被引量:4
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作者 Hua XIAO 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2011年第6期1083-1099,共17页
This paper studies the problem of partially observed optimal control for forward-backward stochastic systems which are driven both by Brownian motions and an independent Poisson random measure. Combining forward-backw... This paper studies the problem of partially observed optimal control for forward-backward stochastic systems which are driven both by Brownian motions and an independent Poisson random measure. Combining forward-backward stochastic differential equation theory with certain classical convex variational techniques, the necessary maximum principle is proved for the partially observed optimal control, where the control domain is a nonempty convex set. Under certain convexity assumptions, the author also gives the sufficient conditions of an optimal control for the aforementioned optimal optimal problem. To illustrate the theoretical result, the author also works out an example of partial information linear-quadratic optimal control, and finds an explicit expression of the corresponding optimal control by applying the necessary and sufficient maximum principle. 展开更多
关键词 Forward-backward stochastic differential equations maximum principle partially observed optimal control random jumps.
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