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Machine Learning for Cataract Classification/Grading on Ophthalmic Imaging Modalities:A Survey

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Machine Intelligence Research 2022年第3期19卷 184-208页

作者： Xiao-Qing Zhang Yan Hu zun-Jie Xiao Jian-Sheng Fang Risa Higashita Jiang liu Research Institute of Trustworthy Autonomous Systems Southern University of Science and TechnologyShenzhen 518055China Department of Computer Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Tomey Corporation Nagoya 4510051Japan Cixi Institute of Biomedical Engineering Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315300China Guangdong Provincial Key Laboratory of Brain-inspired Intelligent Computation Southern University of Science and TechnologyShenzhen 518055China

Cataracts are the leading cause of visual impairment and blindness *** the years,researchers have achieved significant progress in developing state-of-the-art machine learning techniques for automatic cataract classification and grading,aiming to prevent cataracts early and improve clinicians′diagnosis *** survey provides a comprehensive survey of recent advances in machine learning techniques for cataract classification/grading based on ophthalmic *** summarize existing literature from two research directions:conventional machine learning methods and deep learning *** survey also provides insights into existing works of both merits and *** addition,we discuss several challenges of automatic cataract classification/grading based on machine learning techniques and present possible solutions to these challenges for future research.

关键词： Cataract classification and grading ophthalmic image machine learning deep learning

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利伐沙班在犬和猫临床应用的研究进展

动物医学进展 2025年第1期46卷 97-102页

作者：王炜江蓝路心怡付诗懿刘亦婷韦力煣俞峰刘波中国农业大学动物医学院北京100193 中国农业大学教学动物医院北京100193

血栓栓塞是犬、猫临床上多种疾病的并发症,可累及动脉或静脉,预后较差。目前兽医临床防治血栓栓塞可用的抗血栓药物种类有限,影响临床诊疗水平,引入新药具有实际意义。利伐沙班是一种新型非维生素K拮抗剂类口服抗凝药物,研究证明其能够... 详细信息

血栓栓塞是犬、猫临床上多种疾病的并发症,可累及动脉或静脉,预后较差。目前兽医临床防治血栓栓塞可用的抗血栓药物种类有限,影响临床诊疗水平,引入新药具有实际意义。利伐沙班是一种新型非维生素K拮抗剂类口服抗凝药物,研究证明其能够特异性抑制活性凝血因子X从而抑制血栓形成。近年来人医领域对利伐沙班的相关临床研究逐渐丰富,涉及单用利伐沙班或使用双通路抑制疗法防治不同类型的动、静脉血栓栓塞,可为其应用于兽医临床提供据。犬、猫临床使用利伐沙班的研究正相继开展,论文就犬、猫血栓栓塞疾病发病情况、防治现状,利伐沙班的药理学特性及其在人医、兽医领域的临床试验研究进展进行综述,以期为兽医临床上利伐沙班的进一步研究提供参考。

关键词：新型口服抗凝药利伐沙班血栓栓塞犬猫

Nonlinear multifunctional sensor signal reconstruction based on least squares support vector machines and total least squares algorithm

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第4期10卷 497-503页

作者： Xin liu Guo wei Jin-wei SUN Dan liu Department of Automatic Measurement and Control Harbin Institute of Technology Harbin 150001 China

Least squares support vector machines (LS-SVMs) are modified support vector machines (SVMs) that involve equality constraints and work with a least squares cost function, which simplifies the optimization procedure. In this paper, a novel training algorithm based on total least squares (TLS) for an LS-SVM is presented and applied to multifunctional sensor signal reconstruction. For three different nonlinearities of a multifunctional sensor model, the reconstruction accuracies of input signals are 0.001 36%, 0.031 84% and 0.504 80%, respectively. The experimental results demonstrate the higher reliability and accuracy of the proposed method for multifunctional sensor signal reconstruction than the original LS-SVM training algorithm, and verify the feasibility and stability of the proposed method.

关键词： Least squares support vector machine Total least squares Multifunctional sensor Signal reconstruction

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三七土壤参数测定及挖掘铲优化研究

农机化研究 2025年第1期47卷 165-172页

作者：刘梦飞周伟李西兴湖北工业大学机械工程学院武汉430068

针对三七挖掘过程中挖掘铲所受阻力过大的问题,对传统的平面三七挖掘铲进行了优化。首先,对三七土壤参数进行了试验测定,并通过离散元仿真得到了土壤的堆积角,经试验验证所选土壤参数的准确性;其次,采用离散元软件EDEM建立了挖掘铲的仿... 详细信息

针对三七挖掘过程中挖掘铲所受阻力过大的问题,对传统的平面三七挖掘铲进行了优化。首先,对三七土壤参数进行了试验测定,并通过离散元仿真得到了土壤的堆积角,经试验验证所选土壤参数的准确性;其次,采用离散元软件EDEM建立了挖掘铲的仿真模型,计算了其在挖掘过程中所受到的阻力,通过与平面铲对比验证了该结构可以降低挖掘铲在行驶过程中所受到的阻力;再次,以行进过程中所受阻力为指标对挖掘铲进行优化,分析挖掘铲的铲面弧度、铲尖角度、铲的间距和入土角度等参数对挖掘阻力的影响,结果表明:铲面弧度为116°、铲尖角度为120°、铲的间距为86 mm、入土角度为12°时,挖掘阻力最小,相较于传统挖掘铲阻力降低了23.6%;最后,对优化后的挖掘铲进行了试验验证,结果表明:平均误差为2.78%,在5%以内,满足设计需求。研究结果可为块茎类农作物挖掘铲的设计提供参考。

关键词：挖掘铲三七阻力离散元

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基于干涉和实时前馈实现三个量子节点的纠缠

原子与分子物理学报 2025年第4期42卷 113-120页

作者：刘艳红陈伟李雁翔太原师范学院物理系晋中030619 太原师范学院计算机科学与技术学院晋中030619 山西北方机械制造有限责任公司太原030009

纠缠多个空间分离的远程量子节点是构建量子信息网络的基础,不仅如此,多量子节点间的纠缠亦可应用于分布式量子计算和量子精密测量等,实现更高纠缠度的多量子节点间纠缠势在必行.文中基于干涉和实时前馈,借助于腔增强通过采用受激拉曼... 详细信息

纠缠多个空间分离的远程量子节点是构建量子信息网络的基础,不仅如此,多量子节点间的纠缠亦可应用于分布式量子计算和量子精密测量等,实现更高纠缠度的多量子节点间纠缠势在必行.文中基于干涉和实时前馈,借助于腔增强通过采用受激拉曼散射机制实现三个远距离原子系综的纠缠.该方案中只需要三套腔增强原子系统,光学谐振腔增强了光和原子之间的相互作用,使得通过受激拉曼散射产生的斯托克斯光场和反斯托克斯光场的效率得到提高,实现了高纠缠度的光与原子纠缠.在此前提下,基于斯托克斯光场的干涉和实时前馈实现三个远程原子节点间的纠缠.这种方法可以扩展到更大规模,甚至更加复杂的量子信息网络中,从而在量子信息科学中具有潜在的应用.

关键词：原子系综纠缠干涉实时前馈受激拉曼散射

Lipschitz Estimates for Commutators of N-dimensional Fractional Hardy Operators

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Communications in Mathematical Research 2009年第3期25卷 241-245页

作者： ZHENG QING-YU Fu zun-wei Department of Mathematics Linyi Normal University Linyi Shandong 276005

In this paper, it is proved that the commutator Hβ,b which is generated by the n-dimensional fractional Hardy operator Hβ and b ∈λα （R^n） is bounded from L^p（R^n） to L^q（R^n）, where 0 〈 α 〈 1, 1 〈 p, q 〈 ∞ and 1/P - 1/q = （α＋β）/n. Furthermore, the boundedness of Hβ,b on the homogenous Herz space Kq^α,p（R^n） is obtained.

关键词： commutator n-dimensional fractional Hardy operator Lipschitz function Herz space

Probabilistic synthesis against GR(1) winning condition

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Frontiers of Computer Science 2022年第2期16卷 17-25页

作者： wei ZHAO Rui LI Wanwei liu wei DONG Zhiming liu College of Computer Science&Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China College of Computer&Information Science Southwest UniversityChongqing 400715China School of Computer National University of Defense TechnologyChangsha 410073China

Reactive synthesis is a technique for automatic generation of a reactive system from a high level *** system is reactive in the sense that it reacts to the inputs from the *** specification is in general given as a linear temporal logic(LTL)*** behaviour of the system interacting with the environment can be represented as a game in which the system plays against the ***,a problem of reactive synthesis is commonly treated as solving such a game with the specification as the winning *** synthesis has been thoroughly investigated for more two decades.A well-known challenge is to deal with the complex uncertainty of the *** understand that a major issue is due to the lack of a sufficient treatment of probabilistic properties in the traditional *** example,a two-player game defined by a standard Kriple structure does not consider probabilistic transitions in reaction to the uncertain physical environment;and a Markov Decision Process(MDP)in general does not explicitly separate the system from its environment and it does not describe the interaction between system and the *** this paper,we propose a new and more general model which combines the two-player game and the ***,we study probabilistic reactive synthesis for the games of General Reactivity of Rank 1(i.e.,GR(1))defined in this *** specifically,we present an algorithm,which for given model,a location and a GR(1)specification,determines the strategy for each player how to maximize/minimize the probabilities of the satisfaction of at *** use an example to describe the model of probabilistic games and demonstrate our algorithm.

关键词： reactive system probabilistic synthesis GR(1)

Transformation of nanoscale inclusions in 316L stainless steel processed by laser beam powder bed fusion during isothermal heating

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Journal of Iron and Steel Research International 2023年第4期30卷 795-807页

作者： Cheng-song liu wei liu Hua Zhang Hong-wei Ni The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking Wuhan University of Science and TechnologyWuhan 430081HubeiChina

Transformation mechanisms and reaction kinetics for formation of nanoscale inclusions in as-built 316L stainless steel produced by laser beam powder bed fusion(LB-PBF)during subsequent isothermal heating process were investigated and clarified experimentally and *** resulting changes in morphologies,size distributions,number densities,and chemical compositions of the inclusions were measured and discussed,along with microstructure and texture of the *** results showed that with increasing isothermal heating time and temperature,the columnar grains in the as-built LB-PBF 316L stainless steel transformed into equiaxed grains,which grew gradually and exhibited a large number of twins in the FCC *** isothermal heating,the reaction of Si in the steel with MnO–Cr_(2)O_(3)in the nanoscale inclusion resulted in a transformation from the homogeneous oxide MnO–SiO_(2)–Cr_(2)O_(3)to an inclusion with an obvious core–shell structure,and the core part was eventually rich in Si and the shell part was predominantly rich in Mn and Si,depending on the heating temperature and *** Ostwald ripening model used for predicting the growth of nanoscale inclusions during isothermal heating verified that the observed effects of isothermal heating time and temperature were predicted for Si diffusion control.

关键词： 316L stainless steel Laser beam powder bed fusion Nanoscale inclusion Isothermal heating Transformation

Stochastic Volatility Model and Technical Analysis of Stock Price

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Acta Mathematica Sinica,English Series 2011年第7期27卷 1283-1296页

作者： wei liu wei An ZHENG Department of Statistics Shanghai Finance University Shanghai 201209 P. R. China Department of Statistics East China Normal University Shanghai 200062 P. R. China

In the stock market, some popular technical analysis indicators （e.g. Bollinger Bands, RSI, ROC, ...） are widely used by traders. They use the daily （hourly, weekly, ...） stock prices as samples of certain statistics and use the observed relative frequency to show the validity of those well-known indicators. However, those samples are not independent, so the classical sample survey theory does not apply. In earlier research, we discussed the law of large numbers related to those observations when one assumes Black-Scholes＇ stock price model. In this paper, we extend the above results to the more popular stochastic volatility model.

关键词： Stochastic volatility model asymptotic stationary process law of large numbers convergence rate technical analysis indicators