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digital measuring the ocular morphological parameters of guinea pig eye in vivo with Python

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International Journal of Ophthalmology(English edition) 2024年第2期17卷 239-246页

作者： Yue di Zhong-Bao Qiao Hai-Yun Ye Xin-Yue Li Wen-Ting Luo Wang-Yi fang Tong Qiao Department of Ophthalmology Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200062China

AIM:To quantitatively measure ocular morphological parameters of guinea pig with Python ***:Thirty-six eyeballs of eighteen 3-weekold guinea pigs were measured with keratometer and photographed to obtain the horizontal,coronal,and sagittal planes *** corresponding photo pixels-actual length ratio was acquired by a proportional *** edge coordinates were identified artificially by ginput *** and conic curve fitting were applied to fit the contour of the eyeball in the sagittal,coronal and horizontal *** curvature,curvature radius,eccentricity,tilt angle,corneal diameter,and binocular separation angle were calculated according to the geometric ***,the eyeballs were removed,canny edge detection was applied to identify the contour of eyeball in *** results were compared between in vivo and in ***:Regarding the corneal curvature and curvature radius on the horizontal and sagittal planes,no significant differences were observed among results in vivo,in vitro,and the *** horizontal and vertical binocular separation angles were 130.6°±6.39°and 129.8°±9.58°*** the corneal curvature radius and eccentricity in vivo,significant differences were observed between horizontal and vertical ***:The Graphical interface window of Python makes up the deficiency of edge detection,which requires too much definition in *** are significant differences between guinea pig and human beings,such as exotropic eye position,oblique oval eyeball,and obvious discrepancy of *** study helps evaluate objectively the ocular morphological parameters of small experimental animals in emmetropization research.

关键词： ocular morphological parameters guinea pig digital measurement Python

A methodology for laser tool setters calibration and its precise mathematical model

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Chinese Journal of Aeronautics 2024年第7期37卷 564-581页

作者： Tao fang Zixi fang Ze Zhong CHEN Zhiyong CHANG School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an 710072China Gina Cody School of Engineering and Computer Science Concordia UniversityMontrealQuebec H3G 1M8Canada Changsha Optimum CNC Corporation Changsha 410221China Institute for Aero-engine Smart Assembly of Shaanxi Province Xi’an 710072China

On-machine tool setting is a pivotal approach in achieving intelligent manufacturing,and laser tool setters have become a crucial component of smart machine *** tool setters play a crucial role in precisely measuring the dimensions of cutting tools during the part machining process,focusing on tool length and *** a measuring instrument,the positions of the laser axis of the laser tool setter need to be accurately calibrated before ***,in actual calibration scenarios,traditional calibration methods face challenges due to installation errors in the tool setter and geometric errors in the measuring *** address this issue,this study proposes a novel calibration ***,the calibration mechanism of the laser beam axis is *** on the accurate mathematical model of the laser beam and the measuring rod,and using the polygon clipping algorithm,the mathematical mechanism of the laser tool setter’s work is ***,a novel method is introduced to calculate the compensation distance between the laser beam reference point and the rod bottom center point at each moment during ***,by utilizing the kinematic chain of the tool setter calibration system,a new calibration method is developed to accurately calibrate the position of the laser beam axis in the machine tool coordinate ***,the accuracy of the calibration method is verified through simulation experiments and calibration *** method improves the calibration accuracy of the tool setter,and the mathematical model of the laser tool setter can be extended to the measurement of tools,thereby improving the precision of tool *** research significantly improves the efficient production performance of smart machine tools.

关键词： On-machine tool setting Smart machine tools Mathematical model Calibration method Laser tool sette

Preparation of Copper Phthalocyanine Crystals Using Solvothermal Synthesis

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Chemical Research in Chinese Universities 2008年第4期24卷 407-410页

作者： XIA Dao-cheng LI Wan-cheng WANG Xu YU Shu-kun FAN Cui-xiang MA Chun-yu CHENG Chuan-hui FAN Zhao-qi DU Guo-tong CONG fang-di DU Xi-guang State Key Laboratory of Materials Modification by Laser Ion and Electron Beams Dalian University of Technology Dalian 116023 P R. China Chemistry Depatment of Yuncheng University Yuncheng 044000 P R. China State Key Laboratory on Integrated Optoelectronics Jilin University Changchun 130012 P R. China State Key Laboratory for Superamolecular Structure and Materials Jilin University Changchun 130012 P R. China Faculty of Chemistry Northeast Normal University Changchun 130024 P. R. China

A novel solvothermal synthesis method for the direct growth of B-form crystals of copper phthalocyanine（CuPc） is presented in this article. With quinoline as solvent, crystals were grown after cooling the reaction mixture of 1,3-diiminoisoindoline and copper oxide, heated for 9 h at 270 ℃, to room temperature in an autoclave. These high quality crystals were suitable for characterization measurements. The single-crystal diffraction data show a monoclinic system unit cell： a=1.4668（3） nm, b=0.48109（10） nm, c=1.9515（7） nm, a=90°, B=121.04（2）°, r=90°, where the corresponding cell volume is 1.17991 nm^3. Needle-like single crystals of CuPc up to 10.5 mm in length were obtained. The influences of different temperatures, reaction time and solvent volume on the crystal yields were also discussed. Optimum reaction conditions were 10 mL of quinoline, at 270 ℃ for 8 h.

关键词： Solvothermal synthesis Single crystal CuPc Quinoline Solvent Autoclave

Use of a tissue clearing technique combined with retrograde trans-synaptic viral tracing to evaluate changes in mouse retinorecipient brain regions following optic nerve crush

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Neural Regeneration Research 2023年第4期18卷 913-921页

作者： Zong-Yi Zhan Yi-Ru Huang Lu-Wei Zhao Ya-Dan Quan Zi-Jing Li di-fang Sun Ya-Li Wu Hao-Yuan Wu Zi-Tian Liu Kai-Li Wu Yu-Qing Lan Min-Bin Yu Department of Ophthalmology Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene RegulationSun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Light Innovation Technology Ltd. Hong Kong Special Administrative RegionChina Department of Ophthalmology&Visual Science Shanghai Medical CollegeFudan UniversityShanghaiChina Department of Ophthalmology Eye&ENT HospitalFudan UniversityShanghaiChina Department of Ophthalmology The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina

Successful establishment of reconnection between retinal ganglion cells and retinorecipient regions in the brain is critical to optic nerve ***,morphological assessments of retinorecipient regions are limited by the opacity of brain *** this study,we used an innovative tissue cleaning technique combined with retrograde trans-synaptic viral tracing to observe changes in retinorecipient regions connected to retinal ganglion cells in mice after optic nerve ***,we performed light-sheet imaging of whole brain tissue after a clearing *** found that pseudorabies virus 724(PRV724)mostly infected retinal ganglion cells,and that we could use it to retrogradely trace the retinorecipient regions in whole tissue-cleared ***,PRV724-traced neurons were more widely distributed compared with data from previous *** found that optic nerve injury could selectively modify projections from retinal ganglion cells in the hypothalamic paraventricular nucleus,intergeniculate leaflet,ventral lateral geniculate nucleus,central amygdala,basolateral amygdala,Edinger-Westphal nucleus,and oculomotor nucleus,but not the superior vestibular nucleus,red nucleus,locus coeruleus,gigantocellular reticular nucleus,or facial nerve *** findings demonstrate that the tissue clearing technique,combined with retrograde trans-synaptic viral tracing,can be used to objectively and comprehensively evaluate changes in mouse retinorecipient regions that receive projections from retinal ganglion cells after optic nerve ***,our approach may be useful for future estimations of optic nerve injury and regeneration.

关键词： histology image analysis light-sheet imaging optic nerve crush pseudorabies virus retinal ganglion cells three-dimensional imaging tissue clearing viral tracing whole brain study

终极控制权结构下上市公司实际控制人治理行为

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系统工程理论与实践 2008年第12期28卷 1-18页

作者：贾明张喆万迪武汉大学经济与管理学院武汉430072 西安交通大学管理学院西安710049

在终极控制权结构下以中国实践为背景,将控制权私人收益及声誉机制有机融合,以一个统一的模型分析框架研究实际控制人的侵占、监督和支持三种治理行为产生的条件和影响因素,指出终极所有权结构决定实际控制人治理行为进而影响企业绩效,... 详细信息

在终极控制权结构下以中国实践为背景,将控制权私人收益及声誉机制有机融合,以一个统一的模型分析框架研究实际控制人的侵占、监督和支持三种治理行为产生的条件和影响因素,指出终极所有权结构决定实际控制人治理行为进而影响企业绩效,从而弥补终极所有权结构与公司绩效之间跳跃的逻辑关系.

关键词：现金流量权控制权侵占行为监督行为支持行为

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固定翼无人机自动着陆的一体化制导控制

控制理论与应用 2015年第11期32卷 1487-1497页

作者：张聪吴云洁方迪北京航空航天大学虚拟现实技术与系统国家重点实验室北京100191 北京航空航天大学自动化科学与电气工程学院北京100191 北京航空航天大学飞行器控制一体化技术重点实验室北京100191

本文基于制导控制一体化方法的思想,将滑模变结构控制和自抗扰控制技术结合于动态面控制结构中,提出一种固定翼无人机自动着陆方法.在建立六自由度无人机模型、无人机和目标点间的相对视线角度模型的基础上,在动态面控制框架下加入滑模... 详细信息

本文基于制导控制一体化方法的思想,将滑模变结构控制和自抗扰控制技术结合于动态面控制结构中,提出一种固定翼无人机自动着陆方法.在建立六自由度无人机模型、无人机和目标点间的相对视线角度模型的基础上,在动态面控制框架下加入滑模变结构控制来设计制导控制一体化方法.在此过程中加入自抗扰控制技术,提高了系统对未建模部分、参数的不确定性和外界干扰的鲁棒性,并抑制了滑模变结构控制的抖振.该方法使得无人机在平稳地飞向目标点的同时能够满足着陆视线角度的约束.文中详细论述设计思想和设计方法,最后通过仿真验证说明本文方法的有效性.

关键词：无人机倾转弯制导控制一体化动态面控制滑模变结构控制自抗扰控制

Microspace Revitalization Design around Xihuangcun Railway Station from the Perspective of Urban Renewal

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Journal of Landscape Research 2024年第1期16卷 31-34页

作者： WU di XU fang North China University of Technology Beijing 100144China

Railways within the city carry the historical memory of urban development and are important industrial heritage ***,with urban development and changes in transportation functions,railways lose their original application value and are gradually left unused or even abandoned,affecting the vitality of the *** the space around Xihuangcun Railway Station as the research object,the public activity space on both sides of the railway is reshaped through five strategies:function revitalization,traffic revitalization,heritage revitalization,spatial revitalization,and landscape revitalization,and the grey area of the city is transformed into a vibrant development zone of the city.

关键词： Urban renewal Heritage rejuvenation Abandoned railway Microspace

Evolution of soil DOM during thermal remediation below 100℃:concentration,spectral characteristics and complexation ability

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Frontiers of Environmental Science & Engineering 2024年第8期18卷 31-41页

作者： Wan Huang Ziren Wan di Zheng Lifeng Cao Guanghe Li fang Zhang State Key Joint Laboratory of Environment Simulation and Pollution Control State Environment Protection Key Laboratory of Microorganism Application and Risk ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China National Engineering Laboratory for Site Remediation Technologies Beijing 100015China

The impact of thermal remediation on soil function has drawn increasing *** far,as the most active fraction of soil organic matter,the evolution of dissolved organic matter(DOM)during the thermal remediation lacks in-depth investigation,especially for the temperatures value below 100℃.In this study,a series of soil thermal treatment experiments was conducted at 30,60,and 90℃ during a 90-d period,where soil DOM concentration increased with heating temperature and *** molecular weight,functional groups content and aromaticity of DOM all decreased during the thermal *** excitation-emission matrices(EEM)results suggested that humic acid-like substances transformed into fulvic acid-like substances(FIII/FV increased from 0.27 to 0.44)during the heating process,and five DOM components were further identified by *** change of DOM structures and components indicated the decline of DOM stability and hydrophilicity,and can potentially change the bioavailability and *** temperature also resulted in the decline of DOM complexation ability,which may be caused by the loss of binding sites due to the decrease of polar function groups,aromatic structures and hydrophilic *** study provides valuable information about the evolution of DOM during thermal remediation,which would potentially change the fate of metal ions and the effectiveness of the post-treatment technologies in the treated region.

关键词： Thermal remediation below 100℃ Heating temperature Soil DOM concentration DOM spectral characteristics Excitation-emission matrices(EEM) Complexation ability

Triangle-free Graphs with Three Positive Eigenvalues

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Algebra Colloquium 2024年第3期31卷 525-540页

作者： fang Duan School of Mathematical Sciences Xinjiang Normal UniversityUrumqi 830017China

A graph G is called triangle-free if G does not contain any triangle as its induced *** G_(n)be the set of triangle-free graphs of order n each of which has three positive *** this paper,we find 20 specific graphs in G_(n),each of which has nullity no more than 2,and we show that in terms of three graph transformations all the other graphs of G_(n)can be constructed from these 20 specific ***,we completely characterize the triangle-free graphs with exactly three positive eigenvalues.

关键词： positive(negative)inertia index nullity triangle-free graph