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运动模型学习结合局部二值相似模式的间歇性测量目标跟踪方法
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作者 刘娜 强薇 代明慧 《中文科技期刊数据库(全文版)自然科学》 2021年第9期168-171,共4页
针对摄像机的有限视野导致测量可能只是间歇性可用的问题,提出了一种运动模型学习结合局部二值相似模式的间歇性测量目标跟踪方法。首先,开发了一种新型估计器和预测器,实现同时学习运动模型;其次,利用局部二值相似模式编码判断每个像... 针对摄像机的有限视野导致测量可能只是间歇性可用的问题,提出了一种运动模型学习结合局部二值相似模式的间歇性测量目标跟踪方法。首先,开发了一种新型估计器和预测器,实现同时学习运动模型;其次,利用局部二值相似模式编码判断每个像素点属于背景还是运动目标,从而实现像素级别的运动目标检测;然后,从运动的摄像机来估计运动目标的位姿,提供稳定性分析以证明位姿估计和函数近似的收敛,而不需要限制性持续激励条件。最后,实验结果证明了所提方法可以有效地追踪多个目标状态的可行性并且对估计器增益不敏感。 展开更多
关键词 间歇性测量 局部二值相似模式 运动目标检测 运动模型学习 误差估计
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Evaluation of solvent-mediated phase transformation of glycine using oleic acid: Morphology and characterization study 被引量:1
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作者 Sevgi Polat Perviz Sayan 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第9期1829-1836,共8页
The polymorphic phase transformation of β-glycine to α-glycine was carried out both in the absence and presence of various concentrations of oleic acid used as additive at 25 ℃ in a water/ethanol medium. The effect... The polymorphic phase transformation of β-glycine to α-glycine was carried out both in the absence and presence of various concentrations of oleic acid used as additive at 25 ℃ in a water/ethanol medium. The effects of oleic acid and its concentration on phase transformation time were determined by continuously measuring the ultrasonic velocity. The crystals obtained by the completion of the phase transformation were characterized by XRD, SEM, and TG/DTG. The XRD and SEM results indicated that oleic acid significantly impacted phase transformation time and the morphological characteristics of the crystals. In addition to SEM analysis, detailed crystal shape analysis was performed and the circularity, elongation, and convexity parameters were determined quantitatively. TG/DTG analyses were performed to investigate thermal decomposition behavior and to calculate the activation energies based on different kinetic models such as FWO, KAS, Starink, and Tang kinetic models. With the addition of oleic acid to the medium, the calculated activation energy values increased from 89.63–90.63 to153.8–155.4 kJ·mol^(-1). The activation energy values showed that oleic acid was adsorbed on the crystal surface;this result was supported by FTIR, elemental, and Kjeldahl analyses. 展开更多
关键词 GLYCINE Oleic acid CRYSTALLIZATION Isoconversional methods Phase transformation
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