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极轻量的航空影像港口船舶目标检测器
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作者 李胜永 王超男 王孟 《计算机工程与设计》 北大核心 2023年第12期3606-3612,共7页
航空影像下的目标检测由于目标较小,属于该领域中的难点,而通过增加网络的宽度和深度增加其可检能力,会在计算量上付出巨大代价。为此,提供一种极轻量的目标检测器用于航空图像中的目标侦测。算法以港口场景船只目标为例进行仿真,模型... 航空影像下的目标检测由于目标较小,属于该领域中的难点,而通过增加网络的宽度和深度增加其可检能力,会在计算量上付出巨大代价。为此,提供一种极轻量的目标检测器用于航空图像中的目标侦测。算法以港口场景船只目标为例进行仿真,模型大小仅1.64 MB,0.75 T的移动端算力可实现25 fps的速度,同时兼顾准确率。当采用平铺感兴趣区域方式检测时,能够获得足以与超大型网络媲美的准确率。 展开更多
关键词 航空影像 港口 目标检测 实时 感兴趣区域 极轻量 嵌入式
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更轻和更暖的织物
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作者 毕鸿章 《高科技纤维与应用》 CAS 2002年第5期45-45,共1页
关键词 东丽公司 CebonnerSumlon Cebonner SumlonSuper 机织物 中空型 尼龙66短纤维 极轻量 保暖
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Exclusive Semileptonic Rare Decays B→K()(?)+(?)^- in a Top Quark Two-Higgs-Doublet Model
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作者 LV Lin-Xia XIAO Zhen-Jun 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第7期149-160,共12页
Employing improved calculations of the decay form factors from light-cone sum rules, we evaluate the invariant mass spectrum, forward-backward asymmetry, and lepton polarizations of the exclusive processes B → K^(*... Employing improved calculations of the decay form factors from light-cone sum rules, we evaluate the invariant mass spectrum, forward-backward asymmetry, and lepton polarizations of the exclusive processes B → K^(*)e+e- in the SM and T2HDM. From the recent measurements of their branching ratios, we find that these processes do provide additional bounds on the new parameters in the model considered here. After the inclusion of the new physics contributions, the large enhancement of FBA, which is unobservably small within the SM and of the lepton polarization at large tan β, may precisely test the SM or reveal new physics in forthcoming accurate experiments. 展开更多
关键词 semileptonic decay two-Higgs-doublet model POLARIZATION forward-backward asymmetry
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Mixed Quark-Gluon Condensate Beyond Chiral Limit
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作者 卢常芳 吕晓夫 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第5期893-897,共5页
Using the Dyson-Schwinger equation and perturbation theory, we calculate the mixed quark-gluon condensates in the chiral limit and in the case of nonzero quark current mass for the light quark u/d and strange quark s.... Using the Dyson-Schwinger equation and perturbation theory, we calculate the mixed quark-gluon condensates in the chiral limit and in the case of nonzero quark current mass for the light quark u/d and strange quark s. The results show that the mixed quark-gluon condensate will decrease when the quark mass increases. For the quark with zero mass, we obtain mo2 = g(qσuvGuvq)/(qq) 0.68 GeV2, which is in good agreement with the QCD sum rules estimate mo2=(0.8± 0.2) GeV2. 展开更多
关键词 quark current mass mixed quark-gluon condensates QCD sum rule Schwinger Dyson equation Feynman rules
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