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基于改进YOLOv3的车辆检测算法

控制与决策 2024年第4期39卷 1151-1159页

作者：陈文玉赵怀慈刘鹏飞房建孙晖中国科学院光电信息处理重点实验室沈阳110016 中国科学院沈阳自动化研究所沈阳110016 中国科学院机器人与智能制造创新研究院沈阳110169 中国科学院大学北京100049

交通场景下的车辆检测问题存在小目标多、目标遮挡严重等情况,鉴于此,提出一种基于改进YOLOv3的车辆检测算法.由于小目标仅包含较少的像素,特征不明显,算法在空间金字塔结构中融入软池化操作,搭建Soft-SPP结构将多重感受野融合,通过软... 详细信息

交通场景下的车辆检测问题存在小目标多、目标遮挡严重等情况,鉴于此,提出一种基于改进YOLOv3的车辆检测算法.由于小目标仅包含较少的像素,特征不明显,算法在空间金字塔结构中融入软池化操作,搭建Soft-SPP结构将多重感受野融合,通过软池化操作最大程度地保留细节,有效提取小目标特征;引入坐标注意力机制,在调整每个通道特征分配权重的同时能够捕捉具有精确位置信息的远程依赖关系;提出一种新的损失函数KIoU Loss作为边界框损失函数,同时考虑边界框的关键点与长宽比使之回归更加准确.实验结果表明,改进后的算法在自动驾驶KITTI数据集上平均精度达到94.69%,相比原始YOLOv3算法精度提升4.13%,且检测速度仅下降3.16 frame·s^(-1),在保持检测速度的情况下能够明显提升检测精度.

关键词：车辆检测深度学习 YOLOv3 坐标注意力 Soft-SPP KIoU Loss

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新型涂料轧染工艺及助剂

印染 2007年第12期33卷 32-34页

作者：吴庆元孙慈忠杨永许吴晓雁上海长盛印染化工有限公司上海201203

涂料染色时,织物用增深剂处理后,纤维表面带阳电荷,可提高涂料利用率及染深性,降低能耗和污水及化学品的排放量。通过对涂料轧染工艺和助剂进行的优选,提出了新型涂料轧染工艺流程及后序整理工艺。

关键词：轧染涂料染色增深剂湿摩擦牢度

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纱线涂料染色工艺

印染 2008年第10期34卷 29-32页

作者：吴庆元孙慈忠吴晓雁杨永许上海长盛印染化工有限公司上海201203

介绍了涂料绞纱染色、纱线环状染色及后序仿旧整理和柔软整理的工艺和助剂,讨论了涂料染色中增深剂PNT和湿摩擦牢度提高剂PW及PG的性能、用量和使用效果。

关键词：纱线染色涂料增深剂湿摩擦牢度

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涡扇发动机加力燃烧室扩压器流场的数值计算

航空学报 1985年第1期 49-56页

作者：陈义良孙慈中国科技大学沈阳航空发动机研究所

本文用数值计算的方法得到了某型涡扇发动机加力燃烧室扩压器内的流场,与台架状态测得的实验数据基本吻合。研究了不同进口气流参数分布对扩压器流场的影响,计算了台架不同转速状态,不同飞行工况下扩压器内的流场。

关键词：扩压器涡扇发动机加力燃烧室流场中心锥进口涵道比数值计算

Scale effect removal and range migration correction for hypersonic target coherent detection

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Journal of Systems Engineering and Electronics 2024年第1期35卷 14-23页

作者： WU Shang sun Zhi JIANG Xingtao ZHANG Haonan DENG Jiangyun LI Xiaolong CUI Guolong School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

The detection of hypersonic targets usually confronts range migration(RM)issue before coherent integration(ci).The traditional methods aiming at correcting RM to obtain ci mainly considers the narrow-band radar ***,with the increasing requirement of far-range detection,the time bandwidth product,which is corresponding to radar’s mean power,should be promoted in actual ***,the echo signal generates the scale effect(SE)at large time bandwidth product situation,influencing the intra and inter pulse integration *** eliminate SE and correct RM,this paper proposes an effective algorithm,i.e.,scaled location rotation transform(ScLRT).The ScLRT can remove SE to obtain the matching pulse compression(PC)as well as correct RM to complete ci via the location rotation transform,being implemented by seeking the actual rotation *** to the traditional coherent detection algorithms,Sc LRT can address the SE problem to achieve better detection/estimation *** last,this paper gives several simulations to assess the viability of ScLRT.

关键词： hypersonic target detection coherent integration(ci) scale effect(SE)removal range migration(RM)correction scaled location rotation transform(ScLRT)

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氨基酸约化分类对亚线粒体蛋白定位的预测

内蒙古大学学报（自然科学版） 2011年第3期42卷 311-317页

作者：张艳孙慈项新媛左永春李前忠内蒙古大学物理科学与技术学院呼和浩特010021

在Du和Li构建的首个亚线粒体定位数据库基础上,将线粒体蛋白依据亚线粒体位置细分为四大类进行预测.对基于氨基酸的亲疏水特征、物理化学特征和结构特征的蛋白质序列约化信息做出讨论.给出在单肽组分和六类亲疏水约化情形下的蛋白质序... 详细信息

在Du和Li构建的首个亚线粒体定位数据库基础上,将线粒体蛋白依据亚线粒体位置细分为四大类进行预测.对基于氨基酸的亲疏水特征、物理化学特征和结构特征的蛋白质序列约化信息做出讨论.给出在单肽组分和六类亲疏水约化情形下的蛋白质序列最佳分割位点,结果不仅符合真实生物学现象而且范围更加精确,可为相关实验研究提供参考.提出了最佳组合参数,该参数是ω=0.10,λ=22时亲疏水残基指数值及平行相关形式的伪氨基酸组分结合全序列单肽组分,利用支持向量机算法进行预测,达到了较好的预测结果.利用本文提出的最佳组合参数对未知蛋白序列进行检验,结果显示有一定注释作用,特别是对于Inner membrane类和Matrix类的预测精度较高.

关键词：亚线粒体定位约化组分伪氨基酸组分支持向量机

Feasible Synthesis of N,O-Bidentate Difluoroboron Chromophores through Direct Functionalization of Quinoxalin-2(1H)-ones with Ketones in One Shot

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Chinese Journal of Chemistry 2024年第13期42卷 1481-1486页

作者： Shuaichen Zhang Jing Zhang Xiang Ling Yifan Zhao Yue Ma Peng sun State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs Artemisinin Research Center and Institute of Chinese Materia MedicaChina Academy of Chinese Medical SciencesBeijing 100700China Department of Pharmaceutics School of PharmacyChina Pharmaceutical UniversityState Key Laboratory of Natural MedicinesNanjingJiangsu 210009China

Organic difluoroboron complexes are a kind of potential platforms for a wide range of applications owing to their excellent photophysical ***,we have explored a simple and direct synthesis methodology for a library of N,O-bidentate difluoroboron complexes from quinoxalin-2(1H)-ones and ketones in one *** photophysical properties of the generated complexes were evaluated and the application potential of these compounds on subcellular imaging was also explored.

关键词： N,O-Bidentate difluoroboron Chromophores Quinoxalin-2(1H)-ones Ketones/Green chemistry Synthetic method C-CcouplingI Boron

Assessment of the triglyceride glucose index in adult patients with chronic diarrhea and constipation

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World Journal of Clinical Cases 2024年第6期12卷 1094-1103页

作者： Jing-Yi Zhu Mu-Yun Liu Chang sun Department of Gastroenterology The First Affiliated Hospital of Naval Medical UniversityShanghai 200433China Department of Gastroenterology Navy No.905 HospitalNaval Medical UniversityShanghai 200433China

BACKGROUND Accumulating evidence suggests that the gut microbiome is involved in the pathogenesis of insulin resistance(IR).However,the link between two of the most prevalent bowel disorders,chronic diarrhea and constipation,and the triglyceride glucose(TyG)index,a marker of IR,has not yet been *** To investigate the potential association between TyG and the incidence of chronic diarrhea and *** This cross-sectional study enrolled 2400 participants from the National Health and Nutrition Examination Survey database from *** was used as an exposure variable,with chronic diarrhea and constipation as determined by the Bristol Stool Form Scale used as the outcome variables.A demographic investigation based on TyG quartile subgroups was *** application of multivariate logistic regression models and weighted generalized additive models revealed potential correlations between TyG,chronic diarrhea,and *** analyses were performed to examine the stability of any potential *** In the chosen sample,chronic diarrhea had a prevalence of 8.00%,while chronic constipation had a prevalence of 8.04%.In multiple logistic regression,a more prominent positive association was found between TyG and chronic diarrhea,particularly in model 1(OR=1.45;95%ci:1.17-1.79,P=0.0007)and model 2(OR=1.40;95%ci:1.12-1.76,P=0.0033).No definite association was observed between the TyG levels and chronic *** weighted generalized additive model findings suggested a more substantial positive association with chronic diarrhea when TyG was less than 9.63(OR=1.89;95%ci:1.05-3.41,P=0.0344),and another positive association with chronic constipation when it was greater than 8.2(OR=1.74;95%ci:1.02-2.95,P=0.0415).The results of the subgroup analyses further strengthen the extrapolation of these results to a wide range of *** Higher TyG levels were positively associated with abnormal bowel health.

关键词： Triglyceride glucose index National Health and Nutrition Examination Survey Chronic diarrhea Chronic constipation Cross-sectional study Bowel health

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SIMPLE方法的收敛特性

工程热物理学报 1984年第3期 306-311页

作者：陈义良孙慈中国科技大学沈阳航空发动机研究所

在用SIMPLE方法计算模型加力燃烧室的流场时,发现SIMPLE方法存在不易收敛的问题.调试表明,残留误差和参数值波动是造成迭代不收敛的两个主要原因.本文提出了促进收敛的几个主要措施,同时分析了影响收敛的一些因素。

关键词：差分方程 SIMPLE 波动松弛因子网格间距迭代速度场收敛特性进口网格结点收敛速度参数值