镀铜镉柱还原——重氮偶氮染色法在检测海水领域具有重要的位置,算法的不断创新优化成为海水水质检测质量的的关键。本研究以硝酸钾作为标准溶液,海水作溶剂做相关实验,并且在实际海水检测应用中得到良好的效果。通过对实验原理的分析...镀铜镉柱还原——重氮偶氮染色法在检测海水领域具有重要的位置,算法的不断创新优化成为海水水质检测质量的的关键。本研究以硝酸钾作为标准溶液,海水作溶剂做相关实验,并且在实际海水检测应用中得到良好的效果。通过对实验原理的分析及实验过程的探究,确定了本研究的最佳还原与显色条件。并采用偏最小二乘法(partial least squares regression,PLS)算法模型对实验数据进行预处理,利用浊度对其进行补偿,最终得到硝酸盐氮的最优模型。经实验结果比对,该方法确定的检测系统线性范围宽、检出限低,符合海水的快速检测要求。在此基础上设计了一套在线自动检测装置,解决了海水在线、实时监测的难题。展开更多
针对车载边缘计算环境中,边缘节点在为不同数据传输任务分配信道时产生的同信道干扰(Co-Channel Interferences,CCI)问题,本文形式化定义了车载边缘计算信道分配问题,致力于为不同数据传输任务合理分配信道,最大化数据传输任务的完成率...针对车载边缘计算环境中,边缘节点在为不同数据传输任务分配信道时产生的同信道干扰(Co-Channel Interferences,CCI)问题,本文形式化定义了车载边缘计算信道分配问题,致力于为不同数据传输任务合理分配信道,最大化数据传输任务的完成率.利用势博弈模型将全局优化的信道分配问题转化为边缘节点间的分布式信道分配博弈,并证明了信道分配博弈中纳什均衡的存在性.提出了基于激励的概率更新策略选择(Incentive-based Probability Update and Strategy Selection)算法,根据迭代中所选策略的激励值更新策略选择概率,并分析算法结果收敛至纳什均衡.最后,通过仿真实验验证了本文算法的收敛性以及收敛结果纳什均衡的有效性,且在任务完成率及信道利用效率上优于现有代表性算法.展开更多
The creep strain of conventionally treated 2195 alloy is very low,increasing the difficulty of manufacturing Al-Cu-Li alloy sheet parts by creep age forming.Therefore,finding a solution to improve the creep formabilit...The creep strain of conventionally treated 2195 alloy is very low,increasing the difficulty of manufacturing Al-Cu-Li alloy sheet parts by creep age forming.Therefore,finding a solution to improve the creep formability of Al-Cu-Li alloy is vital.A thorough comparison of the effects of cryo-deformation and ambient temperature large pre-deformation(LPD)on the creep ageing response in the 2195 alloy sheet at 160℃with different stresses has been made.The evolution of dislocations and precipitates during creep ageing of LPD alloys are revealed by X-ray diffraction and transmission electron microscopy.High-quality 2195 alloy sheet largely pre-deformed by 80%without edge-cracking is obtained by cryo-rolling at liquid nitrogen temperature,while severe edge-cracking occurs during room temperature rolling.The creep formability and strength of the 2195 alloy are both enhanced by introducing pre-existing dislocations with a density over 1.4×10^(15)m^(−2).At 160℃and 150 MPa,creep strain and creep-aged strength generally increases by 4−6 times and 30−50 MPa in the LPD sample,respectively,compared to conventional T3 alloy counterpart.The elongation of creep-aged LPD sample is low but remains relevant for application.The high-density dislocations,though existing in the form of dislocation tangles,promote the formation of refined T1 precipitates with a uniform dispersion.展开更多
文摘镀铜镉柱还原——重氮偶氮染色法在检测海水领域具有重要的位置,算法的不断创新优化成为海水水质检测质量的的关键。本研究以硝酸钾作为标准溶液,海水作溶剂做相关实验,并且在实际海水检测应用中得到良好的效果。通过对实验原理的分析及实验过程的探究,确定了本研究的最佳还原与显色条件。并采用偏最小二乘法(partial least squares regression,PLS)算法模型对实验数据进行预处理,利用浊度对其进行补偿,最终得到硝酸盐氮的最优模型。经实验结果比对,该方法确定的检测系统线性范围宽、检出限低,符合海水的快速检测要求。在此基础上设计了一套在线自动检测装置,解决了海水在线、实时监测的难题。
文摘针对车载边缘计算环境中,边缘节点在为不同数据传输任务分配信道时产生的同信道干扰(Co-Channel Interferences,CCI)问题,本文形式化定义了车载边缘计算信道分配问题,致力于为不同数据传输任务合理分配信道,最大化数据传输任务的完成率.利用势博弈模型将全局优化的信道分配问题转化为边缘节点间的分布式信道分配博弈,并证明了信道分配博弈中纳什均衡的存在性.提出了基于激励的概率更新策略选择(Incentive-based Probability Update and Strategy Selection)算法,根据迭代中所选策略的激励值更新策略选择概率,并分析算法结果收敛至纳什均衡.最后,通过仿真实验验证了本文算法的收敛性以及收敛结果纳什均衡的有效性,且在任务完成率及信道利用效率上优于现有代表性算法.
基金Project(U22A20190)supported by the National Natural Science Foundation of ChinaProject supported by the Priority Academic Program Development,Jiangsu Higher Education Institution,China。
基金Projects(52274404,52305441,U22A20190)supported by the National Natural Science Foundation of ChinaProjects(2022JJ20065,2023JJ40739)supported by the Natural Science Foundation of Hunan Province,China+2 种基金Project(2022RC1001)supported by the Science and Technology Innovation Program of Hunan Province,ChinaProject(2023ZZTS0972)supported by the Fundamental Research Funds for the Central Universities,ChinaProject(2021YFB3400903)supported by the National Key R&D Program of China。
文摘The creep strain of conventionally treated 2195 alloy is very low,increasing the difficulty of manufacturing Al-Cu-Li alloy sheet parts by creep age forming.Therefore,finding a solution to improve the creep formability of Al-Cu-Li alloy is vital.A thorough comparison of the effects of cryo-deformation and ambient temperature large pre-deformation(LPD)on the creep ageing response in the 2195 alloy sheet at 160℃with different stresses has been made.The evolution of dislocations and precipitates during creep ageing of LPD alloys are revealed by X-ray diffraction and transmission electron microscopy.High-quality 2195 alloy sheet largely pre-deformed by 80%without edge-cracking is obtained by cryo-rolling at liquid nitrogen temperature,while severe edge-cracking occurs during room temperature rolling.The creep formability and strength of the 2195 alloy are both enhanced by introducing pre-existing dislocations with a density over 1.4×10^(15)m^(−2).At 160℃and 150 MPa,creep strain and creep-aged strength generally increases by 4−6 times and 30−50 MPa in the LPD sample,respectively,compared to conventional T3 alloy counterpart.The elongation of creep-aged LPD sample is low but remains relevant for application.The high-density dislocations,though existing in the form of dislocation tangles,promote the formation of refined T1 precipitates with a uniform dispersion.
