SIM-MFR: Spatial interactions mechanisms based multi-feature representation for background modeling

Moving object detection is frequently used as a springboard for advanced computer vision analysis in complex scenes. Nevertheless, due to unstable changes in the background, most existing background model hardly maintain superior performance. To this concern, we propose a novel pixel-level background model that has three innovations. First, we introduce K-means to directly model the spatiotemporal dependencies between pixels. These dependencies are exploited to discover static core information in the high-frequency changing spatial domain, resulting in excellent property in dynamic backgrounds. Besides, the notion of complementarity is taken as a feature selection criterion. In multi-feature model, the ability to supervise each other between features is important in the ambiguity challenges, e.g., shadow. Finally, feature models recommend each other in the update mechanism, and the diffusion rate of effective information in each feature model can be maximized by finding the best candidate feature. By virtue of this mechanism, model can be updated efficiently when large background migration occurs, e.g., PTZ. Experimental results on some standard benchmarks show that SIM-MFR can achieve promising performance compared to some state-of-the-art approaches.     

自升式海洋平台抬升减速器的优化设计

以自升式海洋平台抬升减速器为优化对象,介绍了其特点和工作方式,并将其可靠性和质量作为目标,建立了数学模型对二者进行优化。提出了一种协调其可靠性和经济性的方法,通过改变目标函数中可靠性和质量的权重值得到不同的最优解,并拟合曲线分析如何对可靠性和质量进行权衡,使其能够具有更高的性价比,该方法可为实际中抬升减速器的优化和改良提供参考。     

Therapeutic safety evaluation of sodium glycididazole combined with ^131^I radiotherapy for differentiated thyroid carcinoma

To evaluate safety and therapeutic efficacy of sodium glycididazole (CMNa) combined with 131I radiotherapy for differentiated thyroid carcinoma (DTC),the 60 patients of DTC therapeutic protocols were selected and divided into 3 groups of the DTC 4.44 GBq 131I,DTC 3.70 GBq 131I,and combination of DTC 3.70 GBq 131I with CMNa,and the 20 patients of Graves’ Disease were selected as the control group.Peripheral blood was sampled at 131I pre-treatment of 1 day,and 131I post-treatment of 7,91,and 182 days,thus analyzing lymphocyte micronucleus scores and karyotyping profiles.Compared with the control group,the lymphocyte micronucleus and chromosome mutation rates in 131I treated DTC increased after post-treatment of 7 days,recovered after post-treatment of 91 days,and did not bounce after post-treatment of 182 days.The micronucleus and chromosome mutation rates in the combination of DTC 3.70 GBq 131I with CMNa showed less significant variation than other treated DTC groups.Our results demonstrate that micronucleus assay and karyotyping analysis are favorable to evaluate 131I radiotherapy for DTC.The combination of the CMNa with 131I radiotherapy was safe for DTC patients without affecting the long-term therapeutic outcomes.     

椰子种皮油的提取与脂肪酸组成分析

以椰子种皮为试验材料,对种皮油的提取工艺进行了优化。并对所得种皮油的理化性质和脂肪酸组成进行了分析。结果表明:椰子种皮油的最佳提取工艺为温度60℃,料液比1∶4(g/m L),时间3 h,出油率可达76.83%。所得种皮油具有一定的椰香味,为非干性油(碘值14.69 g/100 g),酸值为13.37 mg/g。月桂酸(42.28%)为其脂肪酸的主要成分,中短链脂肪酸(C8~C12)含量为51.45%,饱和脂肪酸含量达84.49%,是一种值得开发的天然饱和油脂和新型脂肪能源。     

小波变换在手持心电图机中的心电信号去噪应用

本文以小波变换为基础,介绍了小波去噪的方法和步骤,并通过具体的实例分析,说明小波去噪的效果明显优于传统的滤波效果。然后利用软硬阈值小波去噪算法对ECG信号进行消噪处理。结果表明,软阈值去噪的效果明显的优于硬阈值去噪。     

共混改性废旧聚氨酯的再生研究

采用聚甲基丙烯酸甲酯(PMMA)与热塑性聚氨酯(PUR-T)共混改性废旧聚氨酯(PUR),探讨了PMMA与PUR-T用量对PUR再生料的力学性能、加工性能的影响,并分析了树脂与CaCO3的界面相容性.结果表明,添加PMMA或PUR-T共混改性废旧PUR均能使材料的力学性能有所改善;但添加PMMA使再生料的加工性能有所下降,而添加PUR-T使再生料的加工性能提高,通过扫描电子显微镜观察发现,其共混体系中树脂与CaCO3的界面接合性要比PMMA共混体系好.     

Li_(0.97)Al_(0.01)FePO_4正极材料性能研究

选用廉价易得的Al(OH)_3为掺杂铝源,制备掺杂量为x=0.01(计量数)的Li_0.97Al_0.01FePO_4和纯LiFePO_4正极材料,并对其进行XRD、SEM分析和电化学性能测试.经过与LiFePO_4标准谱图对照,Li_0.97Al_0.01FePO_4样品的主要晶相为橄榄石结构的磷酸亚铁锂.在室温,0.1 C倍率恒电流充放电条件下,Li_0.97Al_0.01FePO_4的首次放电比容量为134.0 mAh·g~(-1),且放电容量在前15次循环中非常平稳,后略有减少.第20次循环放电比容量达到129.21 mAh·g~(-1),与未掺杂LiFePO_4材料相比,表现出更高的比容量和优良的循环性能.     

高碳硬线钢快速脱磷热力学分析

硬线钢含碳高、磷硫含量低,生产工艺要求苛刻,在冶炼中常出现碳或磷出格而改钢的情况。对转炉快速脱磷工艺的热力学和动力学进行研究,分析了影响快速脱磷效果的因素,认为快速脱磷的要点是延长熔池在低温运行的时间,造出流动性好、有一定氧化性和高碱度的炉渣,确保终点出钢碳、温度和磷的命中率。     

国内油田深部调剖技术的研究进展

严重的油层非均质性致使水驱和聚合物驱油效果差,常规堵水调剖技术已不能满足油田正常生产需求。因此,近年来提出并发展了深部调剖技术（深部液流转向技术）,在改善高含水油藏水驱和聚合物驱的开发效果方面取得了显著效果。通过全面分析我国深部调剖技术研究现状,提出了深部调剖技术的发展趋势,即在充分认识油藏现状的基础上,实现对高含水油藏和聚合物驱油藏深部水流优势通道的干预,使液流转向,从而改善高含水油藏水驱和聚合物驱效率。     

SPECIFIC HEAT MEASUREMENTS OF ZrAlNiCuCo ALLOY

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