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International Journal of Ophthalmology(English edition) 2024年第4期17卷 610-615页

作者： Jie Wang Su-Zhen Wang Xiao-Lin Qin Meng Chen Heng-Ming Zhang Xin Liu Meng-Jun Xiang Jian-bin hu Hai-Yu huang Chang-Jun Lan Aier Eye Hospital(East of Chengdu) Chengdu 610051Sichuan ProvinceChina Department of Ophthalmology Chengdu First People’s HospitalChengdu 610095Sichuan ProvinceChina School of Computer and Artificial Intelligence Southwest Jiaotong UniversityChengdu 610097Sichuan ProvinceChina Chengdu Aier Eye Hospital Chengdu 610041Sichuan ProvinceChina

AIM:To propose an algorithm for automatic detection of diabetic retinopathy(DR)lesions based on ultra-widefield scanning laser ophthalmoscopy(SLO).METHODS:The algorithm utilized the FasterRCNN(Faster Regions with CNN features)+ResNet50(Residua Network 50)+FPN(Feature Pyramid Networks)method for detecting hemorrhagic spots,cotton wool spots,exudates,and microaneurysms in DR ultra-widefield *** segmentation combined with a deeper residual network FasterRCNN+ResNet50 was employed for feature extraction to enhance intelligent learning *** fusion was carried out by the feature pyramid network FPN,which significantly improved lesion detection rates in SLO fundus ***:By analyzing 1076 ultra-widefield SLO images provided by our hospital,with a resolution of 2600×2048 dpi,the accuracy rates for hemorrhagic spots,cotton wool spots,exudates,and microaneurysms were found to be 87.23%,83.57%,86.75%,and 54.94%,***:The proposed algorithm demonstrates intelligent detection of DR lesions in ultra-widefield SLO,providing significant advantages over traditional fundus color imaging intelligent diagnosis algorithms.

关键词： diabetic retinopathy ultra-widefield scanning laser ophthalmoscopy intelligent diagnosis system

A potential giant gallium deposit hosted in the tailing dam of the Fankou Zn-Pb deposit in northern Guangdong Province, South China

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China Geology 2024年第1期7卷 157-160页

作者： Peng-peng Yu Zhao-bin hu Yi Zheng Lan-xuan Guo Shi-yuan Ouyang Gui-qiang Yuan Shang-zhou Chen Cheng-ming Wang Xi Chen School of Earth Sciences and Geological Engineering Sun Yat-sen UniversityGuangzhou 510275China Guangdong Provincial Key Lab of Geological Process and Mineral Resources Survey Sun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519000China Zhongjin Lingnan Nonfemet Co. LtdShenzhen 518000China

*** The Fankou giant zinc(Zn)-lead(Pb)deposit in Guangdong Province is well-known for its huge reserves of over 10 Mt(million ton)Zn+Pb metals and high ore-grade with Zn+Pb exceeding 15%(Guangdong Fankou Deposit Investigation Group,1980;Zhu XY et al.,2017).After 60 years of exploration and exploitation,the deposit has accumulated millions of tons of *** interesting question is that what components are hosted in these tailings,and whether some key and critical metals such as gallium and germanium are extremely enriched and worth further comprehensive *** motivated us to conduct an integrated set of field investigation,sampling,major-trace element analyses and reserve assessments about the Fankou *** this contribution,we discover that the tailings contain a variety of metal elements such as zinc,lead and gallium with comprehensive utilization *** data can act as a scientific guidance for further exploration and utilization of the Fankou tailings,and aid to enhance the utilization efficiency of the key mineral resource in *** study also provide demonstration for future green mine construction in China.

关键词： deposit comprehensive Guangdong

Impact of different interaction behavior on epidemic spreading in time-dependent social networks

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Chinese Physics B 2024年第3期33卷 190-195页

作者：黄帅陈杰李梦玉徐元昊胡茂彬 School of Engineering Science University of Science and Technology of ChinaHefei 230026China School of Mathematics Southeast UniversityNanjing 210096China

We investigate the impact of pairwise and group interactions on the spread of epidemics through an activity-driven model based on time-dependent *** effects of pairwise/group interaction proportion and pairwise/group interaction intensity are explored by extensive simulation and theoretical *** is demonstrated that altering the group interaction proportion can either hinder or enhance the spread of epidemics,depending on the relative social intensity of group and pairwise *** the group interaction proportion decreases,the impact of reducing group social intensity *** ratio of group and pairwise social intensity can affect the effect of group interaction proportion on the scale of infection.A weak heterogeneous activity distribution can raise the epidemic threshold,and reduce the scale of *** results benefit the design of epidemic control strategy.

关键词： epidemic transmission complex network time-dependent networks social interaction

政策执行模式的生成逻辑与转换机制——基于A市“老楼加梯”政策的纵向案例研究

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探索 2024年第4期 92-109页

作者：李燕胡彬中国海洋大学国际事务与公共管理学院山东青岛266000 浙江大学公共管理学院浙江杭州310000

同一政策的执行过程中往往存在着类型各异又相互转换的政策执行模式,这本质上反映了政策主体为应对外部环境动态变化而做出的适应性调整。探索其背后隐藏的发生机制,不仅有助于明确政策执行过程,更有益于解码“中国之制”和“中国之治... 详细信息

同一政策的执行过程中往往存在着类型各异又相互转换的政策执行模式,这本质上反映了政策主体为应对外部环境动态变化而做出的适应性调整。探索其背后隐藏的发生机制,不仅有助于明确政策执行过程,更有益于解码“中国之制”和“中国之治”的行动逻辑。纵向观测A市“老楼加梯”政策执行过程发现,其存有以权威统筹下的“众创试验”为核心逻辑的试验性执行、以政治激励下的“紧密协作”为核心逻辑的政治性执行、以弹性运作下的“有限合作”为核心逻辑的调适性执行和以刚性规范下的“科层稳态”为核心逻辑的行政性执行四种政策执行模式。这些执行模式的生成逻辑在于,以行动者转译为中介,“政治—社会—政策”三重情境的复合作用会引发执行共同体在“政策优先级—模糊性”两种认知上层叠组合的嬗变转换,以形塑起执行共同体的“耦合”或“解裂”形态;在联结纽带的双向调节作用下,共同体成员间的互动和博弈推动着不同执行模式的演进。其中,连续过程中的知识增长、多期协作下的能量累积是影响政策执行模式转换的关键机制。一方面,政策知识的增长源于前期政策执行的结果反馈,从而影响组织认知的形成;另一方面,以政策共识、共同荣誉、主体间默契、互动经历等为表现形式的合作能量在政策执行过程中不断积蓄,推动着主体间联结韧性的迭代升级。这一动态解释模型的构建,不仅为理解中国场景下的政策执行过程提供了有益思考,也为增进政策执行效能提供了重要理论启示。

关键词：政策执行政策情境政策过程国家治理执行共同体

A transcriptional cascade involving BBX22 and HY5 finely regulates both plant height and fruit pigmentation in citrus

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Journal of Integrative Plant Biology 2024年第8期66卷 1752-1768页

作者： Jialing Fu Li Liao Jiajing Jin Zhihao Lu Juan Sun Lizhi Song Yue huang Shengjun Liu Ding huang Yuantao Xu Jiaxian He bin hu Yiqun Zhu Fangfang Wu Xia Wang Xiuxin Deng Qiang Xu National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops College of Horticulture and Forestry SciencesHuazhong Agricultural UniversityWuhan 430070P.R.China hubei Hongshan Laboratory Wuhan 430070P.R.China Science and Technology Innovation Research Center of Majia Pomelo Shangrao 334000China

Dwarfing is a pivotal agronomic trait affecting both yield and *** species exhibit substantial variation in plant height,among which internode length is a core ***,the molecular mechanism governing internode elongation remains ***,we unveiled that the transcriptional cascade consisting of B-BOX DOMAIN PROTEIN 22(BBX22)and ELONGATED HYPOCOTYL 5(HY5)finely tunes plant height and internode elongation in ***-of-function mutations of BBX22 in an early-flowering citrus(Citrus hindsii“SJG”)promoted internode elongation and reduced pigment accumulation,whereas ectopic expression of BBX22 in SJG,sweet orange(***),pomelo(***)or heterologous expression of BBX22 in tomato(Solanum lycopersicum)significantly decreased internode ***,exogenous application of gibberellin A3(GA3)rescued the shortened internode and dwarf phenotype caused by *** experiments revealed that BBX22 played a dual role in regulation internode elongation and pigmentation in *** the one hand,it directly bound to and activated the expression of HY5,GA metabolism gene(GA2 OXIDASE 8,GA2ox8),carotenoid biosynthesis gene(PHYTOENE SYNTHASE 1,PSY1)and anthocyanin regulatory gene(Ruby1,a MYB DOMAIN PROTEIN).On the other hand,it acted as a cofactor of HY5,enhancing the ability of HY5 to regulate target genes ***,our results reveal the critical role of the transcriptional cascade consisting of BBX22 and HY5 in controlling internode elongation and pigment accumulation in *** the crosstalk regulatory mechanism between internode elongation and fruit pigmentation provides key genes for breeding of novel types with both dwarf and health-beneficial fortification in citrus.

关键词： anthocyanins BBX22 carotenoids citrus HY5 internode elongation plant height

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夹泥灰岩隧道爆破参数对超欠挖的影响研究

工程爆破 2024年第2期30卷 78-87页

作者：胡桂斌中国铁建大桥工程局集团有限公司天津300300

为了研究夹泥灰岩隧道爆破参数对超欠挖的影响,通过ANSYS/LS-DYNA有限元计算软件建立夹泥灰岩隧道周边孔爆破三维模型,以爆破超欠挖面积为评价指标,得到了周边孔的孔间距、径向不耦合系数、光爆层厚度以及装药结构4种关键参数对超欠挖... 详细信息

为了研究夹泥灰岩隧道爆破参数对超欠挖的影响,通过ANSYS/LS-DYNA有限元计算软件建立夹泥灰岩隧道周边孔爆破三维模型,以爆破超欠挖面积为评价指标,得到了周边孔的孔间距、径向不耦合系数、光爆层厚度以及装药结构4种关键参数对超欠挖的影响规律;设计了正交试验方案,得出各爆破参数的最佳取值,并将优化后的爆破方案运用到三角塘隧道中,得到优化后方案超挖面积减小5.03 m^(2),相较于原爆破方案降低了69%,隧道每延米可直接节省经济成本613.8元。

关键词：光面爆破夹泥岩体超欠挖数值模拟

Promoting interactions between cognitive science and large language models

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The Innovation 2024年第2期5卷 9-10页

作者： Youzhi Qu Penghui Du Wenxin Che Chen Wei Chi Zhang Wanli Ouyang Yatao Bian Feiyang Xu bin hu Kai Du Haiyan Wu Jia Liu Quanying Liu Department of Biomedical Engineering Southern University of Science and TechnologyShenzhen 518055China Shanghai AI Laboratory Shanghai 200232China Tencent AI Lab Shenzhen 518057China iFLYTEK AI Research Hefei 230088China School of Medical Technology Beijing Institute of TechnologyBeijing 100081China Institute for Artificial Intelligence Peking UniversityBeijing 100871China Centre for Cognitive and Brain Sciences and Department of Psychology University of MacaoMacao 999078China Department of Psychology Tsinghua UniversityBeijing 100084China

Large language models(LLMs)have made unprecedented progress,demonstrating human-like language proficiency and an extraordinary ability to encode complex *** emergence of high-level cognitive capabilities in LLMs,such as in-context learning and complex reasoning,suggests a path toward the realization of artificial general intelligence(AGI).However,we lack scientific theories and tools to assess and interpret such an emergence of the advanced intelligence of *** intelligence(AI)has been extensively applied in various areas of fundamental science to accelerate scientific research.

关键词： cognitive such language

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缩尺车轮-环轨滚动接触与磨耗特性仿真分析

浙江大学学报（工学版） 2024年第6期58卷 1275-1284页

作者：罗易飞胡彬赵鑫温泽峰西南交通大学牵引动力国家重点实验室四川成都610031

为了研究缩尺车轮-环轨滚动接触与磨耗特性,基于轮轨滚动行为(WRRB)模拟试验台参数,利用ANSYS/LS-DYNA建立瞬态滚动接触有限元模型,集成弹性蠕滑率求解程序和Tγ磨耗模型,通过试验验证模型的正确性.重点分析轮轨力、蠕滑率、接触应力和... 详细信息

为了研究缩尺车轮-环轨滚动接触与磨耗特性,基于轮轨滚动行为(WRRB)模拟试验台参数,利用ANSYS/LS-DYNA建立瞬态滚动接触有限元模型,集成弹性蠕滑率求解程序和Tγ磨耗模型,通过试验验证模型的正确性.重点分析轮轨力、蠕滑率、接触应力和钢轨磨耗深度,并考虑车轮驱动扭矩和速度的影响规律.结果表明:缩尺车轮-环轨结构的高频弹性振动造成轮轨垂向力波动;在比例载荷作用下,纵向动力学行为和钢轨磨耗深度变化趋势与服役轮轨一致;由于环轨的极小曲线半径,自由滚动工况下的横向蠕滑力/率、自旋蠕滑率、钢轨磨耗深度偏大,切向接触应力峰值出现在接触斑后沿两侧;车轮驱动扭矩和速度的影响规律可拟合为一组经验公式.研究可以为此类试验台的设计与应用工作提供理论依据.

关键词：缩尺车轮-环轨显式有限元法瞬态滚动接触蠕滑磨耗

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复杂爆炸载荷致肺损伤试验研究

兵工学报 2024年第5期45卷 1681-1691页

作者：李冈徐冰川胡滨蔡萌中国华阴兵器试验中心陕西华阴714200

为研究真实工况下人员在爆炸冲击波作用下的动态响应特性,开展某型云爆弹静爆作用下工事内仿人形装置(Anthropomorphic Test Device,ATD)和绵羊的毁伤试验研究。采用爆炸测试装置和简易假人作为研究对象,通过6发爆炸试验分析爆炸冲击波... 详细信息

为研究真实工况下人员在爆炸冲击波作用下的动态响应特性,开展某型云爆弹静爆作用下工事内仿人形装置(Anthropomorphic Test Device,ATD)和绵羊的毁伤试验研究。采用爆炸测试装置和简易假人作为研究对象,通过6发爆炸试验分析爆炸冲击波在ATD表面传播规律,开展2种人员损伤预测模型的对比分析。研究结果表明:在本试验工况下,冲击波和崩落的混凝土碎块是主要的毁伤元;爆炸冲击波在ATD表面首先发生反射,随后绕射至其他部位,压力曲线表现出非典型冲击波特征,反射叠加效应明显;在典型冲击波特征正压作用时间区间内,由于Axelsson损伤模型线性阻尼项的影响,求解的胸壁运动速度呈现出先增大至峰值后降低的现象;Axelsson损伤模型与UFC 3-340-02规范相比,在人员损伤预测方面相对保守。所得研究结果可为工程应用及毁伤评估提供参考。

关键词：复杂冲击波肺损伤爆炸测试装置人体胸部胸壁运动速度

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计及阻尼和角速度的锁相环暂态同步稳定性分析与提升方法

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电力系统自动化 2024年第13期48卷 130-137页

作者：占领胡彬王垚鑫年珩浙江大学电气工程学院浙江省杭州市310027

电力电子装置在电网中渗透率的不断提高导致电网强度和惯量降低,电网故障下暂态同步稳定问题日益突出。针对弱电网故障下并网逆变器的暂态失步问题,建立了计及锁相环阻尼和故障瞬间初始角速度的并网逆变器暂态同步模型,分析了锁相环阻... 详细信息

电力电子装置在电网中渗透率的不断提高导致电网强度和惯量降低,电网故障下暂态同步稳定问题日益突出。针对弱电网故障下并网逆变器的暂态失步问题,建立了计及锁相环阻尼和故障瞬间初始角速度的并网逆变器暂态同步模型,分析了锁相环阻尼和初始角速度变化对暂态同步稳定性的影响规律。提出了基于频率偏差反馈矫正的锁相环附加阻尼控制方法,以提升并网逆变器的暂态同步稳定性。针对不存在稳定平衡点的严重电网故障带来的暂态失步问题,提出了锁相环输出角速度动态补偿方法,实现了故障恢复后系统的稳定运行。最后,搭建硬件在环实验平台,对理论分析和控制方法进行了验证。

关键词：暂态同步稳定性锁相环并网逆变器附加阻尼