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Safety control strategy for vertebral lamina milling task 被引量:4
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作者 Luping Fan Peng Gao +5 位作者 Baoliang Zhao Yu Sun xiaoxiao xin Ying Hu Shoubin Liu Jianwei Zhang 《CAAI Transactions on Intelligence Technology》 2016年第3期249-258,共10页
Vertebral lamina milling task is one of the high-risk operations in spinal surgeries. The operation is to remove part of vertebral lamina and release the pressure on the spinal nerve. Because many important vessels an... Vertebral lamina milling task is one of the high-risk operations in spinal surgeries. The operation is to remove part of vertebral lamina and release the pressure on the spinal nerve. Because many important vessels and nerves are under the vertebral lamina, any incorrect operation may cause irreparable damage to patients. To improve the safety of lamina milling task, a fuzzy force control strategy is proposed in this paper. Primary experiments have been conducted on bone samples from different animals. The results show that, with the fuzzy force control strategy, the bone milling system can recognize all surgery states and halt the tool at the proper location, achieving satisfactory surgery performance. 展开更多
关键词 Safety control Force feedback Fuzzy logic control Vertebral lamina milling Spinal surgery
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随机利率和随机波动率框架下的鲁棒最优投资组合(英文) 被引量:1
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作者 周杰明 郑箫箫 +1 位作者 张鑫 黄娅 《南开大学学报(自然科学版)》 CAS CSCD 北大核心 2016年第5期102-111,共10页
研究了一个随机利率和随机波动率框架下的鲁棒最优投资组合问题.假设投资者具有模糊厌恶性,且可以将其资金投资在包含银行账户,零息债券及股票的金融市场中.进一步假定利率服从CIR模型,股票价格服从Heston模型.通过求解该随机控制问题... 研究了一个随机利率和随机波动率框架下的鲁棒最优投资组合问题.假设投资者具有模糊厌恶性,且可以将其资金投资在包含银行账户,零息债券及股票的金融市场中.进一步假定利率服从CIR模型,股票价格服从Heston模型.通过求解该随机控制问题及证明验证定理,给出了最优投资策略及值函数的解析表达式. 展开更多
关键词 鲁棒控制 HJBI方程 随机利率 效用最大化 Heston模型 CIR模型
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