14 research outputs found

    Automatic Matching Method for 2D Animation Character and Its Computing Implementation

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    目前二维动画制作一般采用基于关键帧的方法,其主要步骤包括关键帧绘制,中间帧绘制以及着色等。这些步骤枯燥繁琐,且制作效率低,是制约动画发展的瓶颈。随着相关技术的发展,二维动画制作过程中的很多工作和任务已经可以由计算机辅助完成。但是,因二维动画制作流程的特殊性,目前的计算机辅助动画主要还是指动画的后期制作阶段。其主要的中间帧绘制及着色,由于无法实现关键帧中动画角色的自动匹配,需要由动画师手动建立匹配关系,使得新动画的制作效率极低。另一方面,由于错误匹配的存在,动画师对已有的成品和半成品二维动画,无法进行有效的自动检索和复用。因此,实现关键帧中动画角色的“语义理解”,对传统的动画制作及整个动画产业具...In conventional cartoon production, users conduct the procedures of inbetweening and coloring to generate inbetween frames and fill colors in them based on the given key frames. These procedures are the most tedious and time consuming parts for an industrial production due to the huge numbers of inbetween frames are required to create smooth motions. With the rapid development of computer animatio...学位:理学博士院系专业:信息科学与技术学院_人工智能基础学号:3152010015406

    类泛素蛋白及其中文命名

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    泛素家族包括泛素及类泛素蛋白,约20种成员蛋白.近年来,泛素家族领域取得了迅猛发展,并已与生物学及医学研究的各个领域相互交叉.泛素家族介导的蛋白质降解和细胞自噬机制的发现分别于2004和2016年获得诺贝尔奖.但是,类泛素蛋白并没有统一规范的中文译名. 2018年4月9日在苏州召开的《泛素家族介导的蛋白质降解和细胞自噬》专著的编委会上,部分作者讨论了类泛素蛋白的中文命名问题,并在随后的\"泛素家族、自噬与疾病\"(Ubiquitinfamily,autophagy anddiseases)苏州会议上提出了类泛素蛋白中文翻译草案,此草案在参加该会议的国内学者及海外华人学者间取得了高度共识.冷泉港亚洲\"泛素家族、自噬与疾病\"苏州会议是由美国冷泉港实验室主办、两年一度、面向全球的英文会议.该会议在海内外华人学者中具有广泛影响,因此,参会华人学者的意见具有一定的代表性.本文介绍了10个类别的类泛素蛋白的中文命名,系统总结了它们的结构特点,并比较了参与各种类泛素化修饰的酶和它们的生物学功能.文章由45名从事该领域研究的专家合作撰写,其中包括中国工程院院士1名,相关学者4名,长江学者3名,国家杰出青年科学基金获得者18名和美国知名高校华人教授4名.他们绝大多数是参加编写即将由科学出版社出版的专著《泛素家族介导的蛋白质降解和细胞自噬》的专家

    Curve-Skeleton Extraction Using Appropriate Threshold Optimization

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    该文根据骨架定义及优秀骨架的性质,提出一种图像处理方法。该方法对图像的物体像素点进行检测,评测每个像素点成为骨架点的可能性大小,然后以一个阈值对像素点进行分类,以便确定后续进行骨架提取的像素点,并通过选取适当的阈值,来获取视觉主骨架。实验表明:该方法与传统骨架提取方法相结合,所获取骨架较好地保存了目标的主要拓扑结构,在骨架的拐角更加圆滑、自然,能够有效减少骨架毛刺,并且处理所需时间有效减少。The curve-skeleton of an object is an important abstract geometrical and topological representation of its shape,which is extremely useful for pattern recognition and computer vision applications involving in shape analysis.In this paper,we propose an effective algorithm for extracting curve skeleton based on the definition and properties of curve skeleton from pixel cloud,which integrates the advantages of the visual main parts’reliability for object recognition and the skeleton’s reduced-dimension for object representation.This algorithm can detect each pixel of the image,and find the salience value of each pixel;the salience value is the possibility of the pixel being a skeleton point.Then an appropriate threshold is selected to pruning the skeleton and to get the curve skeleton.In this way,the algorithm can be effective in reducing the number of non-skeleton pixels,and reduce the overall time of extracting skeleton.The experiments show that the skeleton keeps the topology of the target.And the corners of the skeleton are smoother and more natural.In additionally,it can effectively reduce redundant branches of skeleton

    不同补水方式对白星花金龟水分平衡的影响

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    为研究水分散失和水分补充对新疆新害虫白星花金龟Potosia brevitarsis Lewis的影响,在30℃恒温条件下,采用重量法测定白星花金龟脱水过程以及不同补水方式下(补蒸馏水;补盐水;补糖水)体内水分含量的变化,并与步甲、拟步甲的水分代谢进行比较。结果表明,白星花金龟的脱水与拟步甲科的网目拟地甲Opatrum subaratum Fald相似,在10h内脱水率均约为5%,而斑步甲Anisodactylus signatus 10h内脱水率约为20%。不同补水处理后,白星花金龟体内含水量迅速增加,随后继续脱水;脱水10d后,补蒸馏水、补盐水和补糖水处理的白星花金龟脱水率分别为28%,27%和21%,而未补水白星花金龟的脱水率为34%;未补水处理的甲虫脱水率和补蒸馏水和补盐水处理之间无显著性差异,而和补糖水处理之间存在显著性差异。未补水、补蒸馏水、补盐水和补糖水处理的LT50分别约为9,12,13和17d,补糖水能有效延长甲虫的存活时间。糖能有效地增加白星花金龟体内含水量,对维持其体内水分平衡起重要作用

    Effect of the Bypass Dead Volume on the Recovery of the Five-zone and Six-zone Cascade Simulated Moving Beds

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    五区串联模拟移动床(SIMulATEd MOVIng bEd,SMb)可以分离出三组分混合物的中间保留组分,但在实际应用中由于存在支路死体积和返混引起被分离的中间保留组分浓度波的滞后,从而导致一定的回收率损失.对核桃油乙酯分离的实验表明:在相同操作条件下,0.8和1.6Ml的支路死体积对应的中间保留组分(亚油酸乙酯)回收率分别为95%和80%;因此较小的支路死体积会明显增加被分离的中间保留组分的回收率.基于此,本研究提出了六区串联SMb工艺,设计的工艺形式使得它面对不同的支路死体积,仍能保持高回收率.对核桃油乙酯分离结果表明:在保证被分离的中间保留组分高纯度情况下,即使支路死体积较大,也有高的回收率,达到99%.因此,该新的串联SMb工艺具有很好的实际应用价值.The five-zone cascade simulated moving bed(SMB)is able to separate the medium-retained component in a ternary mixture.However the concentration wave of the medium-retained component could be delayed due to the effect of the bypass dead volume,leading to the loss of recovery in practical use.In this work,a case study on the separation of walnut oil ethyl ester revealed that larger dead volume caused lower recovery of the medium-retained component at the same operation conditions:the recovery was 80%with the bypass dead volume of 1.6 mL,while it reached 95% with 0.8 mL of the dead volume.Consequently,a six-zone cascade SMB was proposed and applied to eliminate the effect of the bypass dead volume.The implement of the novel SMB showed that a high recovery(99%)of the medium-retained component with high purity was achieved even with relatively large bypass dead volumes,indicating that the proposed six-zone SMB is a practically useful technique.海洋公益性专项(201105029-2); 国家重大科学仪器设备开发专项(2013YQ17052508

    Indocyanine Green Loaded Magnetic Carbon Nanoparticles for Near Infrared Fluorescence/Magnetic Resonance Dual-Modal Imaging and Photothermal Therapy of Tumor

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    Malignant tumor incidences have been rapidly rising recently and are becoming a serious threat to human health. Herein, a multifunctional cancer targeted theranostic nanoplatform is developed by in situ growth of iron oxide magnetic nanoparticles on carbon nanoparticles, and then loaded with fluorescent dye indocyanine green (ICG@MCNPs). The loading of ICG on the nanoplatform significantly improves its photostability, and hence facilitates long-term near-infrared fluorescence (NIRF) imaging and efficient photothermal therapy (PTT) of tumor. The in vivo NIRF imaging reveals that ICG@MCNPs can be targeted to the tumor site. Moreover, in vivo magnetic resonance imaging also confirmed the efficient accumulation of ICG@MCNPs in the tumor site. Inspiringly, the subsequent PTT of tumor-bearing mice is achieved, as evidenced by the complete ablation of the tumor and the recovery of the physiological indexes to normal levels. Benefitting from its low-cost, simple preparation, and excellent dual-modal imaging and therapy, the ICG@MCNPs-based theranostic nanoplatform holds great promise in tumor-targeted nanomedicine

    成都城区PM_(2.5)季节污染特征及来源解析

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    于2009&mdash;2010年各季节典型月在成都城区采集了大气PM_(2.5)样品,对PM_(2.5)的质量浓度及其主要化学成分(含碳组分、水溶性无机离子和元素)进行了测定. 结果显示:成都城区PM_(2.5)平均质量浓度高达(165.1&plusmn;85.1)&mu;g&middot;m~(-3),是国家环境空气质量标准年均PM_(2.5)限值的4.7倍. OC、EC和水溶性二次离子(SO_4~(2-),NO_3~-和NH_4~+)的平均浓度分别为(22.6&plusmn;10.2)&mu;g&middot;m~(-3),(9.0&plusmn;5.4)&mu;g&middot;m~(-3)和(62.8&plusmn;44.3)&mu;g&middot;m~(-3),分别占PM_(2.5)浓度的13.7%、5.5%和38.0%. PM_(2.5)及其主要化学成分浓度季节特征明显,即秋冬季高于春夏季. 利用正交矩阵因子分析(PMF)对成都城区PM_(2.5)的来源进行解析,结果表明,土壤尘及扬尘、生物质燃烧、机动车源和二次硝酸盐/硫酸盐的贡献率分别为14.3%、28.0%、24.0%和31.3%. 就季节变化而言,生物质燃烧源贡献率在四个季节均维持在较高水平;土壤尘及扬尘的贡献率在春季显著提高;机动车源的贡献率在夏季中表现突出;而二次硝酸盐/硫酸盐的贡献率在秋冬季中则最为显著.</p

    电导法研究紫外光预辐照对核孔膜径迹蚀刻的影响

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    利用紫外光辐照聚碳酸酯(PC)离子径迹膜,研究光辐照对于核孔膜蚀刻过程的影响。实验结果显示,紫外光照射对核孔膜的蚀刻有着重要的作用,它可以有效地增加径迹的蚀刻速率,并且径迹蚀刻速率随紫外光照时间的增加呈线性增长关系,此现象是由于光降解作用引起的。本文还介绍了用于监测核孔膜蚀刻过程的电导测量方法,利用此方法可以得出核孔膜径迹蚀刻速率、孔径随蚀刻时间变化等关系

    基于激光雷达的自然资源三维动态监测现状与展望

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    激光雷达作为一种主动的三维遥感观测技术,在不同尺度的土地、矿产、森林、草原、湿地、水、海洋等自然资源的三维动态监测中发挥着越来越重要的作用。本文将在简要介绍激光雷达技术发展现状的基础上,重点阐述激光雷达技术在各类自然资源三维动态监测中的应用现状,同时对激光雷达在自然资源调查中的应用潜力和局限性进行综合分析,最后探讨以激光雷达技术为基础的自然资源三维动态监测的未来发展趋势和方向。随着激光雷达技术和平台的不断发展以及激光雷达信息的深入挖掘,将不断促进激光雷达技术在自然资源三维动态监测应用中的纵深发展。然而单一激光雷达数据由于其本身存在的局限性,难以满足自然资源全要素、全流程、全覆盖、高精度、高效率的现代化动态监测的要求,如何将多源、多尺度、多平台遥感数据与人工智能相结合,构建"天—空—地"一体化的自然资源调查监测技术体系,是未来自然资源三维动态监测的发展方向
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