The Research on Part-Based Object Recognition

心理学研究表明，人类仅从物体的轮廓片段信息就可以识别出物体。国外一些学者研究也表明，计算机也同样能够在仅有物体轮廓片段信息的基础上识别物体。本文深入研究了基于轮廓片段的图像识别过程以及相关技术，并从相应实验中得到良好的识别效果。 首先要从样本图片库中获取大量的轮廓片段信息，建立一个轮廓片段库。本文提出了一种基于角点的轮廓片段获取方法。角点是二维图像亮度变化剧烈的点或图像边缘曲线上曲率极大值的点，是图像的一个重要局部特征，它集中了图像上的很多重要的形状信息来反映图像的局部特征。以角点为窗口中心，提取窗口内的轮廓信息构成轮廓片段库。由于角点的性质，决定角点周围的轮廓也是物体轮廓中最具代表性的轮廓...Psychophysical studies show that human being can recognize objects using fragments of outline contour alone. Some other scholar also found that computer can recognize objects only based on the fragments of outline contour alone too. In this paper, we do systematic, deep and comprehensive research on the whole procedure of the part-based object Recognize and the technology related. And we get quite...学位：工学硕士院系专业：信息科学与技术学院计算机科学系_计算机应用技术学号：2302006115246

小扭口藓(Barbula indica)芽胞发育特征的实验研究

在光照培养箱中人工对照培养小扭口藓(Barbulaindica(Hook. )Spreng)的芽胞,显微镜下观察并记录其发育成配子体的全过程。结果表明:小扭口藓芽胞在3 ~4d即可萌发; 10d左右开始分化出绿丝体、轴丝体及假根; 18d,轴丝体上的侧枝顶端细胞以分生缢割的方式产生单细胞或多细胞芽胞; 40d,轴丝体上开始出现配子体原始细胞;之后,配子体原始细胞发育成桑椹状的幼小配子体。还对芽胞形态发育、生理生态及配子体发生过程的特点进行了分析和讨论。，CN 23-1480/

A wide-area distributed cluster

中文摘要: 本文研究了广域网分布式集群的设计。与LVS 相比,这种集群的结构虽然复杂,但是能够克服传统集群的局限性,提供质量好,容量大,性价比高的解决方案。根据一种称之为CG 树的分布式集群的抽象模型,作者设计了自己CG 树算法。这种方案能有效的减少网络节点之间的通信开销,并能在集群系统出现故障时自动进行调整,保证了高可用性。模拟实验结果表明,该系统具有很好的性能。英文摘要：The paper studies the designs of wide-area distributed cluster. Although these kinds of cluster have more complex structure,they can overcome limitations of traditional cluster and provide resolutions with good quality, large capacity and high performance compared to LVS. Base on a model of distributed cluster, named CG tree, the author design his algorithms to manipulate CG trees. The scheme can efficiently reduce the cost of intercommunication between different networks, and can automatically adjust tree to ensure high availability when cluster faults occur. The result of simulated experiments indicates that the system has quite good performance.基金项目: 国家重点基础研究发展计划(973 计划) 项目(No.2007CB311005);国家863 计划项目(2006AA01Z129);福建省自然科学基金计划资助项目(A0710020);厦门大学985 二期信息创新平台项

第八届国际数据挖掘与应用统计研究会学术简述

第八届国际数据挖掘与应用统计研究会于2016年7月23-26日在大庆市隆重召开。本届会议由国际数据挖掘与应用统计研究会主办,东北石油大学、厦门大学数据挖掘研究中心、台北医学大学大数据研究中心和重庆允升科技大数据研究中心联合承办。会议主题为"卓越数据共享统计的理论及应用研究",来自国内外近100所高校、政府和企事业单位200多位专家学者莅临参加。大会入选论文52篇,分为大数据分

数据挖掘与应用统计现状及趋势研究——第八届国际数据挖掘与应用统计研究会年会学术综述

国际数据挖掘与应用统计研究会是我国从事数据挖掘领域研究最早的学术研究团体之一。从2006年以来,为政府、高校、研究机构以及企业界的数据挖掘专家和学者提供了一个学术交流的高端平台。2016年第八届年会的主题是"卓越数据共享统计的理论及应用研究",此次会议会聚了国内外众多专家学者,共同聚焦数据挖掘和统计应用的发展趋势

细胞毒性T 淋巴细胞相关抗原4 基因型与中国南方人群Graves ’ 病的关系

【目的】探讨细胞毒性T淋巴细胞相关抗原-4(cytotoxic T lymphocyte associated antigen 4)基因第一外显子A／G(49)多态性与中国南方汉族人群Graves′病的关系。【方法】用PCR-RFLP确定CTLA-4基因第1外显子49位点基因型，分析广东地区汉族人Graves′病患者(GD组)120例及123名正常人(对照组)CTLA-4基因多态性。并把GD患者按性别、家族史、TRAb、突眼等分别分两亚组后分析CTLA-4基因第1外显子A49G位点基因型及等位基因的频率。【结果】CTLA-4基因第1外显子49位点G等位基因频率在GD组为0.704，对照组为0.679，A等位基因频率在GD组为0.296，对照组为0.321，基因型频率GG在GD组为0.483，对照组为0.447，AA在GD组为0.089，对照组为0.075，二组间均无统计学差异，P值均＞0.05。在GD组，按性别、家族史、TRAb及突眼进行分亚组后分析，CTLA-4基因A49G位点的基因型、等位基因频率也没有表现出差异(P值均＞0.05)。【结论】CTLA-4基因第一外显子A／G(49)多态性可能不是中国南方汉族人Graves′病的主要易感因素

転移性肝腫瘍の超音波診断 第1報 リアルタイム超音波像と組織生検法による検討

The diagnostic accuracy of B-mode real-time ultrasonography on liver metastatic tumors of 1,192 patients was analysed. In parallel, ultrasound-guided fine needle aspiration cytology or needle biopsies were performed in some cases suspected for liver metastasis. The ultrasound diagnosis of liver metastasis were correct in 286 (94.7%) of 302 cases. On laparotomy, 52 cases of liver metastasis were further found from 890 patients who had shown negative findings. The overall accuracy was 94.3%, sensitivity was 94.7%, specificity was 94.2%, positive predictive value for metastatic Ca. was 84.6%, and negative predictive value was 98.1% in the diagnosis of liver metastasis. US-guided liver aspiration cytology was performed in 79 cases, malignant cells were found in 67. The overall accuracy rate was 84.8%, with a sensitivity of 85.9%, a specificity of 100%, and a positive predictive value of 100%. A histologic study of tissue fragment preparations was performed for 45 of 53 cases with 21-gauge biopsy needles by histologic examination biopsy. The overall accuracy rate of the histologic biopsy evaluation was 88.7%, with a sensitivity of 88.2%, a specificity of 100%, and a positive predictive value of 100%. False-negative results were seen in 11 cases of the cytologic, and in 6 cases of the biopsy specimens. Combined cytology and biopsy evaluations were performed in 38 cases. The histologic diagnosis were obtained in 45 cases by histologic biopsy, and in 16 cases only by aspiration cytology. There were not any false-positive result or any serious complications in either examination. The majority of liver metastases showed varied small (less than 30mm), multiple lesions in the liver. Five echoic patterns were classified in this paper. The hyperechoic pattern were 124 cases (43.4%), and hypoechoic pattern were 92 cases (32.2%). The lesions smaller than 30mm discovered by US were in 215 (75.2%) of 286 cases of liver metastases. There were 273 cases suffering multiple lesions, 87 cases in the right, 24 cases in the left lobe, and 162 cases in the whole of the liver. Fifty-four cases had single lesions, found in the left lobe in 25 (46.3%) and the right lobe in 29 (53.7%) cases. The "bull\u27s eye" sign or "target" sign is an important characteristic pattern of liver metastasis under US. Calcification or necrosis may occur in some lesions. It is difficult to find a smaller lesion in the fornix of the right liver lobe or when it is an isoechoic pattern metastasis, and when the liver is? heterogenous as when caused by bile stagnation or other etiologies. We conclude that US is very useful in the clinic to check-up or follow-up in liver metastasis, and ultrasound-guided fine needle aspiration cytology or needle biopsy are powerful arms for diagnosing hepatic tumors

多波长萤光分光光度法(二)——萤光黄、罗丹明6G和罗丹明B三组分混合物的测定

本文叙述了应用多波长萤光分光光度法测定人工样品中的萤光黄、罗丹明6G和罗丹明B_。于波长502nm直接测量萤光黄的萤光强度,罗丹明6G和罗丹明B均不干扰;罗丹明6G的测定波长λ_1为555nm,参比波长λ_2和λ_3为502nm和660nm,罗丹明B的测定波长λ_1选用585nm,参比波长λ_2、λ_4和λ_3相应为538nm、508nm和494nm,方法的相对误差一般小于6%。作者于前文叙述了多波长萤光分光光度法的原理,为了验证该原理的可靠性,特对萤光黄、罗丹明6G和罗丹明B人工混合样品进行实测。结果表明,方法原理可靠,实验操作和数据处理简便快速,三次测定平均偏差<3%

大处理液量在线除砂洗砂工艺

为减轻原油集输系统的“砂害”，研究出一种管道旋流除砂洗砂密闭工艺系统。主要除砂原理是采用涡旋离心与重力沉降相结合的分离原理。该系统主要是由分离器、除砂器、泵、污水池等组成。实际运行结果表明，平均除砂率76.7％，大于200μm砂粒的分离效率达到75％，大大减轻了采出液中含砂量大对原油集输系统的危害。并取得了很好的经济效益和社会效益