The reseaech for an improved meanshift tracking algorithm

运动目标跟踪包括对视频序列中的运动目标进行实时监测、分析、提取、跟踪以及行为描述等过程，是一门综合性技术，融合了图像处理、模式识别、人工智能等众多学科技术，在民用和军事应用中均有着广泛的用途。本文在运动目标跟踪中的主要理论方法的基础上进行总结，针对其不足进行适当改善以提高算法的跟踪性能。 特征的提取在基于图像的目标跟踪技术研究中发挥着重要的作用，由于角点特征算子在特征匹配中表现出了良好的鲁棒性，而且广泛应用于目标跟踪的meanshift算法在非线性、非高斯系统的状态估计中具有优越性，因此将meanshift与角点特征相结合用于复杂场景的目标跟踪具有重要的研究价值。本文介绍了两种典型的角点特征...Moving target tracking include video sequence of moving targets real-time monitoring, analysis, extraction, tracking, and behavioral description of the process,is a comprehensive technology integration of image processing, pattern recognition, artificial intelligence, many disciplines in the civilwide range of applications and military applications. On the basis of the moving target tracking in th...学位：工学硕士院系专业：信息科学与技术学院通信工程系_通信与信息系统学号：2332008115327

The Design of Web Server based on SOPC and uC/OS-II

信息化时代使得互联网快速的渗透到世界的各个角落，通过网络控制设备的时代也逐渐来临。嵌入式设备因为结构紧凑、性能功耗比大、稳定性强、低成本的优势使得它被广泛应用。信息化时代的信息交互意味着将设备接入互联网的迫切要求，嵌入式系统接入互联网也是大势所趋。 互联网有着一整套非常严密的组织架构，遵守着虚拟世界的法律：互联网协议。要将物理世界的嵌入式设备接入互联网，就必须遵守互联网的协议。TCP/IP协议是设备接入互联网的基础，SOPC是嵌入式设备系统发展的趋势，基于以上的分析考虑，最后选用了Altera公司的CycloneIVEP4CE115FPGA芯片。后利用开发工具NiosII建立整个SOPC系统...The internet exists in the every corner of the world as we live in the information age,when the embedded device can be controlled via ethernet.The embedded device is widely used because of its compact structure,the good performance per watt, strong stability and the low cost. And the Information exchange means it’s the trend and it’s urgentto connect the embedded device to Internet. Internet co...学位：理学硕士院系专业：物理与机电工程学院物理学系_凝聚态物理学号：1982009115252

一种surf自适应滤波算法在智能交通中的应用

为满足智能交通中对车辆跟踪准确性较高的要求本文提出一种结合Surf特征算子的粒子滤波算法。通过提取Surf特征集合,进行特征匹配、模板更新,减少粒子滤波过程中的粒子数,以满足车辆跟踪过程中的实时、准确。实验结果表明:此算法可以较好地实现交通中运动目标的跟踪,并且改进后的算法具有良好的实时性和鲁棒性

Software Design of the PMSM Servo System Ba sed on theμC /OS2Ⅱ

摘要: 对以TMS320LF2407为基础, 如何在μC /OS - Ⅱ实时多任务内核的环境下建立永磁同步 电动机伺服系统的位置环、速度环和电流环进行了阐述; 通过运用μC /OS2Ⅱ来调度任务, 提高 了系统的稳定性、可靠性和安全性, 缩短了软件设计的周期和难度, 提高了程序的可读性和可维护性。ABSTRACT: Using the TMS320LF2407A as the microp rocessor, the paper p resents how to design the software the three kinds of position, speed and current closed loop controlmodels in the PMSM servo sys2 tem which usingμC /OS2Ⅱ real2time multitask kernel. UsingμC /OS2Ⅱ to attemper the task, can im2 p roved stability、reliability and security, shorten the period and difficulty of the software designing, im2 p roved the readability and maintainability of p rocedure

基于μ C/OS-Ⅱ的永磁同步电动机伺服控制系统软件设计

以TMS320LF2407芯片为微处理器的基础之上,在μC/OS-Ⅱ实时多任务内核的环境下建立永磁同步电动机伺服系统的位置环、速度环、电流环三闭环。通过运用μC/OS-Ⅱ来调度任务,提高了系统的稳定性、可靠性和安全性,缩短了软件设计的周期和难度,提高了程序的可读性和可维护性

PWM strategy with virtual switching time for five-phase inverter

针对五相电压源型逆变器的脉冲宽度调制控制技术,提出一种基于虚拟开关时间的电压调制方法。该方法利用虚拟开关时间的概念推导出一个时间自由度与逆变器各相实际开关时间的关系。在一个开关周期内,通过对该自由度及各相开关时间的合理安排,可以有效的提高系统的调制系数。该方法既简单易懂,又容易数字化实现,无需进行扇区和目标矢量位置的判断,避免了计算量大的问题;通过一个额外自由度的运用,可以方便地在各种类型的脉冲宽度调制间实现无缝切换,并且在一定程度上也揭示了载波型脉冲宽度调制和空间矢量脉冲宽度调制的内在联系。仿真结果验证了该方法的有效性。The pulse width modulation(PWM)approach for five-phase voltage source inverter(VSI) is presented in this paper based on the concept of virtual switching time with a detailed explanation.The relationship between time degree of freedom and the actual inverter switching time of each phase is derived by using this concept.Through reasonable arrangement of the degree of freedom and switching time of each phase,the modulation factor in one switching cycle can be improved effectively.Various PWM schemes can be implemented with lower computational burden through this approach,as it's easy to be understood and realized,and furthermore,a seamless change from one modulation scheme to another becomes feasible.And to some extent,the internal relations of carrier-based PWM and space vector pulse width modulation(SVPWM) are also revealed.The proposed modulation strategy is proved to be effective through using numerical simulations.国家985工程建设项目(0630X13400

Research on Salt Tolerance of Rice Transformed by mangrin Gene

以转MAngrIn基因水稻的阳性植株(11#,59#,86#)和阴性植株为材料,在0,100,150,200 MMOl/l的nACl溶液中经盐胁迫7 d后,测定叶片相对含水量、质膜透性、超氧化物歧化酶(SOd)活性和脯氨酸含量4项耐盐指标。结果表明:盐胁迫下,转基因植株的叶片相对含水量、脯氨酸含量、SOd活性明显高于阴性植株,叶片电导率则低于阴性植株。对转基因植株和阴性植株的耐盐性综合评定结果是11#>59#>86#>阴性植株。Plants transformed by mangrin gene(11#,59#,86#) and negatives were tested using several salt tolerance indices,including related water content,cell membrane permeability,SOD activity and proline content,which were conducted under the NaCl concentration of 0,100,150,200 mmol/L after 7 days.The results indicated that the transgenic rice plants accumulated more RWC,proline content and SOD activity than ck under salt stress conditions,yet cell membrane permeability decreased less than ck.According to physiological target in synthetically evaluation,the result is 11#> 59#> 86#> Negatives.福建省青年人才基金项目(2006F3022);福建省自然科学基金项目(2007J0250

Toxicity Study of VOSO_4 Using NMR-based Metabonomics

通讯作者：陈忠 E-mail: [email protected][中文文摘]采用基于核磁共振(NMR)的代谢组学方法,结合生化指标分析及组织病理学检测,研究了具有类胰岛素活性的硫酸氧钒(VOSO4)对Wistar大鼠的毒性作用.通过不同剂量的VOSO4对Wistar大鼠连续灌胃给药16d,收集大鼠的血清和尿液,并采集样品的1H NMR谱进行多变量数据统计分析来辨识其特征代谢物,然后采用TICL(a web Tool for automatic Interpretation of Compound List)方法建立特征代谢物的代谢网络模型,分析受影响的主要代谢途径及其相互关系.研究结果表明:高剂量组(45mg/kg)和低剂量组(15mg/kg)的特征代谢物含量与对照组存在明显的差异;与对照组相比,高剂量和低剂量组血清中乳酸、肌氨酸酐以及牛磺酸等代谢物的含量增加,尿液中氧化三甲胺(TMAO)、肌酐、牛磺酸和甘氨酸等代谢物的含量增加,并呈现显著的剂量依赖关系;给药组中乙酸和琥珀酸的含量都降低.这些结果说明VOSO4可能影响大鼠体内的糖代谢、脂类代谢及肠道菌群代谢等多个代谢系统,高剂量的VOSO4会导致肝脏毒性和肾脏损伤.[英文文摘]NMR-Based metabonomics combined with clinical biochemical analysis and histopathological examination was applied to investigate the toxicity effects of vanadyl sulfate with insulin-like activity in male Wistar rats. Male Wistar rats were administrated with VOSO4 at doses of 15 and 45 mg/kg body weight by intragastric administration for 16 d. Urine and serum samples were collected and analyzed by 1H NMR experiment. Multivariate analyses were employed to identify the characteristic metabolites for the toxicity effects of vanadyl sulfate.Then the metabolic networks of these characteristic metabolites were built up using TICL (a web Tool for automatic Interpretation of Compound List). The relationship between the characteristic metabolites and the main matebolic pathways perturbed were analyzed and discussed. The differences of metabolic profiles were examined among high-dose (45 mg/kg), low-dose (15 mg/kg) of VOSO4 and control groups. Compared to the control group, increased levels of lactate, creatinine and taurine in serum and increased excretion of trymethylamine-N2-oxide, creatinine, taurine and glycine in urine were found in both high- and low-dose groups which showed an obvious dose-dependent relationship. On the other hand, the concentration of acetate and succinate were decreased in both serum and urine samples of dosed groups. These results indicate that VOSO4 have disturbed the carbohydrate metabolism, lipid metabolism and gut microflora and the high-dosage of VOSO4 may cause liver and kidney injury.卫生部科学研究基金-福建省卫生教育联合攻关计划(No.WKJ2008-2-36);福建省自然科学基金(No.2009J01299)资助项

乳腺癌患者配偶焦虑抑郁状况的调查及相关因素分析

目的:评估乳腺癌患者配偶的焦虑抑郁状况,分析影响焦虑抑郁的相关因素。方法:采用问卷方式,调查蚌埠医学院第一附属医院肿瘤外科110名乳腺癌患者配偶。该问卷由焦虑自评量表(SAS)、抑郁自评量表(SDS)和人口社会学资料组成。结果:乳腺癌患者配偶焦虑和抑郁的发生率分别为43.36%和40.91%。SAS、SDS评分与国内常模比较差异均有统计学意义(P<0.01)。乳腺癌患者配偶常见焦虑、抑郁情绪的相关因素为年龄、文化程度、付费形式、家庭月收入、肿瘤分期等。结论:乳腺癌患者配偶焦虑、抑郁的发生率较高,临床护理中要加强对配偶的心理干预

代谢组学数据分析方法及在糖尿病研究中的应用

对NMR波谱数据的统计分析是基于NMR代谢组学研究的关键问题之一.鉴于NMR波谱信号可以近似为样品中各种成分谱信号的线性叠加,本文将非负矩阵分解(NMF)方法引入基于NMR代谢组学的数据处理中,并与代谢组学中常用的统计方法——主成分分析(PCA)进行比较.通过NMF和PCA两种方法对健康志愿者与2型糖尿患者血液和尿液的NMR谱图的统计分析,对所获取的特征代谢物进行比较和验证,并探讨了PCA方法可能存在的不足之处及其原因;阐明了NMF方法是基于NMR的代谢组学研究中较理想的数据分析方法.最后,讨论了基于NMR代谢组学在糖尿病研究中的前景