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Development and Validation of an Automatic Ultrawide-Field Fundus Imaging Enhancement System for Facilitating clinical Diagnosis:A cross-Sectional Multicenter Study

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engineering 2024年第10期41卷 179-188页

作者： Qiaoling Wei Zhuoyao Gu Weimin Tan Hongyu Kong Hao Fu qin Jiang Wenjuan Zhuang Shaochi Zhang Lixia feng yong Liu Suyan Li Bing qin Peirong Lu Jiangyue Zhao Zhigang Li Songtao Yuan Hong Yan Shujie Zhang Xiangjia Zhu Jiaxu Hong chen Zhao Bo Yan Department of Ophthalmology Eye&ENT Hospital of Fudan UniversityShanghai 200231China School of computer Science Shanghai Key Laboratory of Intelligent Information ProcessingFudan UniversityShanghai 200433China The Affiliated Eye Hospital of Nanjing Medical University Nanjing 210029China Ningxia Eye Hospital People’s Hospital of Ningxia Hui Autonomous RegionThird Clinical Medical College of Ningxia Medical UniversityYinchuan 750002China Department of Ophthalmology The First Affiliated Hospital of Anhui Medical UniversityHefei 230022China Southwest Hospital/Southwest Eye Hospital Third Military Medical University(Army Medical University)Chongqing 400038China Key Lab of Visual Damage and Regeneration Restoration of chongqing Chongqing 400038China Department of Ophthalmology The Affiliated Xuzhou Municipal Hospital of Xuzhou Medical UniversityXuzhou 221000China Department of Ophthalmology Suqian First Hospital of Jiangsu Province HospitalSuqian 223800China Department of Ophthalmology The First Affiliated Hospital of Soochow UniversitySuzhou 215006China Department of Ophthalmology The Fourth Affiliated Hospital of China Medical UniversityEye Hospital of China Medical UniversityShenyang 110000China Department of Ophthalmology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Department of Ophthalmology Jiangsu Province HospitalNanjing 210029China Shaanxi Eye Hospital Xi’an People’s Hospital(Xi’an Fourth Hospital)The Affiliated People’s Hospital of Northwest UniversityXi’an 710004China

In ophthalmology,the quality of fundus images is critical for accurate diagnosis,both in clinical practice and in artificial intelligence(AI)-assisted *** the broad view provided by ultrawide-field(UWF)imaging,pseudocolor images may conceal critical lesions necessary for precise *** address this,we introduce UWF-Net,a sophisticated image enhancement algorithm that takes disease characteristics into *** the Fudan University ultra-wide-field image(FDUWI)dataset,which includes 11294 Optos pseudocolor and 2415 Zeiss true-color UWF images,each of which is rigorously annotated,UWF-Net combines global style modeling with feature-level lesion *** consistency loss is also applied to maintain fundus feature integrity,significantly improving image *** and qualitative evaluations demonstrated that UWF-Net outperforms existing methods such as contrast limited adaptive histogram equalization(cLAHE)and structure and illumination constrained generative adversarial network(StillGAN),delivering superior retinal image quality,higher quality scores,and preserved feature details after *** disease classification tasks,images enhanced by UWF-Net showed notable improvements when processed with existing classification systems over those enhanced by StillGAN,demonstrating a 4.62%increase in sensitivity(SEN)and a 3.97%increase in accuracy(Acc).In a multicenter clinical setting,UWF-Net-enhanced images were preferred by ophthalmologic technicians and doctors,and yielded a significant reduction in diagnostic time((13.17±8.40)s for UWF-Net enhanced images vs(19.54±12.40)s for original images)and an increase in diagnostic accuracy(87.71%for UWF-Net enhanced images vs 80.40%for original images).Our research verifies that UWF-Net markedly improves the quality of UWF imaging,facilitating better clinical outcomes and more reliable AI-assisted disease *** clinical integration of UWF-Net holds great

关键词： Ultrawide-field imaging Fundus photography Image enhancement algorithm Artificial intelligence Multicenter study Artificial intelligence-assisted diagnostics Diagnostic accuracy

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子午线轮胎有限元分析平台的开发

轮胎工业 2024年第8期44卷 451-457页

作者：冯强李淼王传铸雍占福青岛科技大学高分子科学与工程学院山东青岛266042 泰凯英(青岛)专用轮胎技术研究开发有限公司山东青岛266100

使用Python编程语言编写脚本,对轮胎在Abaqus软件中的有限元建模过程进行二次开发,搭建子午线轮胎有限元分析平台,将复杂的有限元建模过程参数化,并以11.00R20载重子午线轮胎为例对有限元建模过程进行验证。结果表明,二次开发的有限元... 详细信息

使用Python编程语言编写脚本,对轮胎在Abaqus软件中的有限元建模过程进行二次开发,搭建子午线轮胎有限元分析平台,将复杂的有限元建模过程参数化,并以11.00R20载重子午线轮胎为例对有限元建模过程进行验证。结果表明,二次开发的有限元分析平台在保证仿真精度的前提下,将原来需要1~2 h才能完成的轮胎有限元建模过程缩短至2 min左右即可完成,极大地提高了工作效率。有限元分析平台的搭建对于有限元分析在轮胎行业中应用的推广和轮胎性能的优化有着十分重要的意义。

关键词：子午线轮胎有限元分析平台 Python编程语言 Abaqus软件二次开发

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Recovery of valuable metals from waste diamond cutters through ammonia–ammonium sulfate leaching

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International Journal of Minerals,Metallurgy and Materials 2017年第12期24卷 1352-1360页

作者： Ping Xue Guang-qiang Li yong-xiang Yang qin-wei qin Ming-xing Wei Key Laboratory for Ferrous Metallurgy and Resource Utilization of Ministry of Education Wuhan University of Science and Technology School of Electromechanical and Architectural engineering Jianghan University Department of Materials Science and engineering Delft University of Technology

copper and zinc were recovered from waste diamond cutters through leaching with an ammonia–ammonium sulfate system and air as an oxidant. The effects of experimental parameters on the leaching process were investigated, and the potential–pH(E–pH) diagrams of cu–NH_3–SO_4^(2-)–H_2O and Zn–NH_3–SO_4^(-2)–H_2O at 25°c were drawn. Results showed that the optimal parameters for the leaching reaction are as follows: reaction temperature, 45°c; leaching duration, 3 h; liquid-to-solid ratio, 50:1(mL/g); stirring speed, 200 r/min; ammonia concentration, 4.0 mol/L; ammonium sulfate concentration, 1.0 mol/L; and air flow rate, 0.2 L/min. The results of the kinetics study indicated that the leaching is controlled by the surface chemical reaction at temperatures below 35°c, and the leaching is controlled by diffusion through the product layer at temperatures above 35°c.

关键词： recovery waste diamond cutters renewable resources ammonia–ammonium sulfate leaching kinetics

Effect of microstructure and passive film on corrosion resistance of 2507 super duplex stainless steel prepared by different cooling methods in simulated marine environment

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International Journal of Minerals,Metallurgy and Materials 2020年第8期27卷 1100-1114页

作者： Min Zhu qiang Zhang yong-feng Yuan Shao-yi Guo School of Mechanical engineering&Automation Zhejiang Sci-Tech UniversityHangzhou 310018China National and Local Joint engineering Research center of Reliability Analysis and Testing for Mechanical and Electrical Products Zhejiang Sci-Tech UniversityHangzhou 310018China

The effect of microstructure and passive film on the corrosion resistance of 2507 super duplex stainless steel(SDSS)in simulated marine environment was investigated by electrochemical measurements,periodic wet–dry cyclic corrosion test,scanning Kelvin probe force microscopy,atomic force microscopy,and X-ray photoelectron *** results show that the occupation ratio ofγphase increases with the decrease in cooling rate,whereas the content ofαphase reduces *** addition,theσprecipitated phase only emerges in the annealed *** pitting sensitivity and corrosion rate of 2507 SDSS reduce first and then increase as the cooling rate ***σprecipitated phase drastically reduces the protective ability of the passive film and facilitates micro-galvanic corrosion of the annealed *** various microstructures,the pits are preferentially distributed within theσandγ*** corrosion resistance of 2507 SDSS prepared by different cooling methods is closely related to the microstructure and structure(stability and homogeneity)of the passive *** steel shows an optimal corrosion resistance,followed by the quenched and annealed steels.

关键词： stainless steel microstructure corrosion resistance passive film

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金矿采矿工程中采矿技术的应用剖析

世界有色金属 2024年第5期 61-63页

作者：冯玉石李永芹临朐县自然资源和规划局山东潍坊262600 临朐县综合行政执法局山东潍坊262600

金矿采矿工程是资源开采的重要领域,其采矿技术的选择与运用直接关系到矿石的产量、质量和经济效益。随着科技的不断发展,金矿开采技术也日新月异,对于提高金矿资源的开采效率、降低开采成本以及保障矿工安全等方面都具有不可替代的作... 详细信息

金矿采矿工程是资源开采的重要领域,其采矿技术的选择与运用直接关系到矿石的产量、质量和经济效益。随着科技的不断发展,金矿开采技术也日新月异,对于提高金矿资源的开采效率、降低开采成本以及保障矿工安全等方面都具有不可替代的作用。本文探讨了我国金矿采矿技术的发展历程,明确了金矿采矿工程的特征,阐述了采矿技术的具体应用,并提出了采矿技术在金矿采矿工程中的应用策略,希望能够为金矿采矿工程的创新与发展提供一定支持。

关键词：金矿采矿工程采矿技术应用

Improving Ocean Data Services with Semantics and Quick Index

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Journal of computer Science & Technology 2021年第5期36卷 963-984页

作者： Xiao-Li Ren Kai-Jun Ren Zi-chen Xu Xiao-yong Li Ao-Long Zhou Jun-qiang Song Ke-feng deng college of computer Science and Technology National University of Defense TechnologyChangsha 410073China college of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China college of computer Science and Technology Nanchang UniversityNanchang 330031China

Massive ocean data acquired by various observing platforms and sensors poses new challenges to data management and ***,it is difficult to find the desired data from the large amount of datasets efficiently and *** of existing methods for data discovery are based on the keyword retrieval or direct semantic reasoning,and they are either limited in data access rate or do not take the time cost into *** this paper,we creatively design and implement a novel system to alleviate the problem by introducing semantics with ontologies,which is referred to as Data Ontology and List-Based Publishing(DOLP).Specifically,we mainly improve the ocean data services in the following three ***,we propose a unified semantic model called OEDO(Ocean Environmental Data Ontology)to represent heterogeneous ocean data by metadata and to be published as data ***,we propose an optimized quick service query list(QSQL)data structure for storing the pre-inferred semantically related services,and reducing the service querying ***,we propose two algorithms for optimizing QSQL hierarchically and horizontally,respectively,which aim to extend the semantics relationships of the data service and improve the data access *** results prove that DOLP outperforms the benchmark ***,our QSQL-based data discovery methods obtain a higher recall rate than the keyword-based method,and are faster than the traditional semantic method based on direct ***,DOLP can handle more complex semantic relationships than the existing methods.

关键词： data service ocean data ontology semantic representation

煤-热协同开采导水断层岩体热-流-固耦合试验研究

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采矿与安全工程学报 2024年第2期41卷 352-361页

作者：马丹侯文涛孔赛博张吉雄李樯周楠高富强汪锋刘勇中国矿业大学矿业工程学院深部煤炭资源开采教育部重点实验室江苏徐州221116 广州市城市规划勘测设计研究院广东广州510060 山东科技大学能源与矿业工程学院山东青岛266590

导水断层岩体的高渗透性为煤炭-水热型地热能高效协同开采提供了新思路,研究深部热-流-固耦合条件下断层岩体的渗透性演变规律是实现煤-热协同开采的重要前提。自主研制了热-流-固耦合三轴试验系统,开展了导水断层岩体热-流-固耦合特性... 详细信息

导水断层岩体的高渗透性为煤炭-水热型地热能高效协同开采提供了新思路,研究深部热-流-固耦合条件下断层岩体的渗透性演变规律是实现煤-热协同开采的重要前提。自主研制了热-流-固耦合三轴试验系统,开展了导水断层岩体热-流-固耦合特性试验。试验结果表明,热-流-固耦合作用下破碎岩体的渗透过程可以划分为冲蚀增透阶段及体缩抑流阶段,其中,冲蚀增透阶段发生在试验初期,岩体的渗透性参数(孔隙率、流速及渗透率)在该阶段迅速增长,进入体缩抑流阶段后保持小幅波动。高温下岩石颗粒的热膨胀效应抑制了岩体孔隙空间扩展,导致渗透参数在冲蚀增透阶段增长缓慢;水压越高,渗透参数在冲蚀增透阶段增幅越大,表明高水压的冲蚀效应更显著;加载轴压与围压均会促进岩体的体缩效应,抑制渗透压力的冲蚀效果,导致试样渗透特性降低。文章丰富了导水断层岩体热-流-固耦合特性研究,为煤-热高效协同开采提供了试验基础。

关键词：煤-热协同开采断层岩体热-流-固耦合特性冲蚀效应

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基于时域积分的温差流量传感器仿真与试验

石油机械 2024年第4期52卷 110-119页

作者：冯爽魏勇杜雪梅李冰刘杰陈强林斯长江大学电子信息与电气工程学院中国石油集团测井有限公司长庆分公司中国石油集团测井有限公司测井技术研究院

目前对于温差流量传感器的研究处于摸索阶段,传感器温度场与流量关系不明确,开展传感器的模拟仿真和试验有助于进一步提高传感器的分辨率和稳定性。为此,通过cOMSOL仿真软件对测速传感器温度场进行了仿真分析和试验研究,探究了流量和持... 详细信息

目前对于温差流量传感器的研究处于摸索阶段,传感器温度场与流量关系不明确,开展传感器的模拟仿真和试验有助于进一步提高传感器的分辨率和稳定性。为此,通过cOMSOL仿真软件对测速传感器温度场进行了仿真分析和试验研究,探究了流量和持水率对测速传感器温度场的影响规律,明确了流量和持水率与时域积分结果的关系。试验结果表明:流量和持水率与积分结果均呈单调递减关系,与仿真结果一致,且在流量0~30 m^(3)/d,持水率0~100%的条件下,测速传感器的分辨率达到了1 m^(3)/d。所得结论可为温差流量检测方法的应用提供理论参考。

关键词：低产液油井温差流量传感器时域积分流量检测测速传感器仿真持水率

Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at cSNS Back-n

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Nuclear Science and Techniques 2024年第1期35卷 178-187页

作者： Sheng-Da Tang yong-Hao chen Jing-Yu Tang Rui-Rui Fan qiang Li Gong Li Dong Liu Zheng-Yao Jin Xing-Zhu cui Tian-Xiang chen Yi-Wei Yang Rong Liu Han Yi Yang Li Zhen Yang Qi An Hao-Fan Bai Jiang-Bo Bai Jie Bao Ping cao Qi-Ping chen Zhen chen Zeng-Qi cui An-chuan Fan chang-qing feng Fan-Zhen feng Ke-qing Gao Min-Hao Gu chang-cai Han Zi-Jie Han Guo-Zhu He yong-cheng He Yang Hong Yi-Wei Hu Han-Xiong Huang Wei-Hua Jia Hao-yu Jiang Wei Jiang Zhi-jie Jiang Ling Kang Bo Li chao Li Jia-Wen Li Xiao Li Jie Liu Shu-Bin Liu Guang-Yuan Luan chang-Jun Ning Bin-Bin Qi Jie Ren Zhi-Zhou Ren Xi-chao Ruan Zhao-Hui Song Kang Sun Zhi-Xin Tan Li-Jiao Wang Peng-cheng Wang Zhao-Hui Wang Zhong-Wei Wen Xiao-Guang Wu Xuan Wu Li-Kun Xie yong-Ji Yu Guo-Hui Zhang Lin-Hao Zhang Mo-Han Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang Yue Zhang Zhi-yong Zhang Mao-Yuan Zhao Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu Sino-French Institute of Nuclear engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Institute of High-Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science center Dongguan 523803China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China USTc Archaeometry Laboratory University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and chemistry China Academy of Engineering PhysicsMianyang 621900China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Northwest Institute of Nuclear Technology Xi’an 710024China University of chinese Academy of Sciences Beijing 100049China

Nondestructive and noninvasive neutron assays are essential applications of neutron *** resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an *** back-streaming neutron line(Back-n)is a newly built time-of-flight facility at the china Spallation Neutron Source(cSNS)that provides neutrons in the eV to 300 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the cSNS Back-n via two test *** results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at *** study reveals its potential future applications.

关键词： cSNS White neutron beam NRTA Nuclide identification Nondestructive method