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肛肠疾病合并梅毒防护策略 被引量:1
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作者 刘珊珊 熊之焰 《皮肤病与性病》 2020年第2期202-204,共3页
肛肠疾病合并梅毒患者在肛肠科临床及护理工作中对医护人员及患者家属的防护提出了更高要求,本次研究以肛肠术后梅毒患者院内、院外可能传播梅毒的途径为风险点,制定防护策略,以期降低此类患者肛肠术后的梅毒传播。
关键词 肛肠疾病合并梅毒 防护 术后传播
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Simulation and optimization for synthetic technology of 2-chloro-4,6-dinitroresorcinol based on back-propagation neural network
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作者 史瑞欣 Huang Yudong 《High Technology Letters》 EI CAS 2007年第3期283-286,共4页
Back-propagation neural network was applied to predict and optimize the synthetic technology of 2-chloro-4,6-dinitroresorcinol. A model was established based on back-propagation neural network using the experimental d... Back-propagation neural network was applied to predict and optimize the synthetic technology of 2-chloro-4,6-dinitroresorcinol. A model was established based on back-propagation neural network using the experimental data of homogeneous design as the training sample set and the technological parameters were optimized by it. The optimal technological parameters are as follows: the reaction time is 4h, the reaction temperature is 80℃, the molar ratio of NaOH to 4,6-dinitro-1,2,3-trichlorobenzene is 5.5:1, the molar ratio of methanol to 4,6-dinitro-1,2,3- trichlorobenzene is 11:1, and the molar ratio of water to 4,6-dinitro-1,2,3-trichlorobenzene is 70:1. Under the optimal conditions, three groups of experiments were performed and the average yield of 2-chloro-4,6-dinitroresorcinol is 96.64%, the absolute error of it with the predicted value is -1.07%. 展开更多
关键词 2-chlom-4 6-dinitroresorcinol synthetic technology OPTIMIZATION back-propagation neural network model constructing
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