移动机器人视觉导航系统的设计与实现

实时、准确的提取道路信息和控制机器人的运动状态是机器人视觉导航系统的关键,针对这两点提出了一套基于ARM处理器的解决方案和控制算法,并着重研究了坐标几何校正算法和最小曲率半径算法.实践结果表明,该套算法简便有效、实时性好、可靠性高,适用于简易机器人的视觉导航.     

基于单目视觉的装配机器人研究及应用

针对传统工业机器人灵活性和环境适应能力差的缺点,对视觉机器人的关键技术进行了研究,提出了一套完整的识别定位抓取算法。首先,对于视觉机器人的目标识别跟踪问题,设计并实现了基于改进型Camshift的动态目标识别跟踪算法;其次,为了使机械臂精确抓取目标工件,采用单目视觉测距和视觉导航的原理对于目标工件的三维位置进行获取;最后,采用改进D-H参数法对机械臂进行运动建模,利用正逆运动学分析确定了机械臂控制方案。测试结果表明,识别算法识别成功率达到100%,定位算法测量坐标与实际坐标之间的相对误差小于5%,整体装配成功率达到96.7%,最终达到了基于单目视觉装配机器人研究的应用目标。     

机器人单目视觉定位模型及其参数辨识

从机器人运动控制的需要出发,在分析视觉坐标系和机器人坐标系的映射关系基础上,建立了机器人单目视觉定位的数学模型.提出了基于遗传算法的参数辩识方法.该算法直接利用建立的视觉定位数学模型和一组特征点实测结果,通过遗传算法得到包括摄像机参数在内的所有参数.比较了直接测量法、待定系数法、基于遗传算法3种计算方法在实际ROBOCUP全自主机器人平台的运用结果,实验证实提出的算法可以得到更好的实际效果.     

机器人视觉中的信息处理技术的应用

在研究智能机器人的过程中,自主机器人的运动是主要方面,其中使用视觉进行导航占了很大一个比重,因为相比于使用其他的传感器来进行导航有很大的优点,因此人们在研究移动机器人的过程中,都倾向于研究视觉导航功能。而对于机器人来说,在视觉导航方面无疑会用到信息处理技术,而信息处理技术作为重要一项,扮演了非常重要的角色。本文通过研究视觉理论,研究了机器人的视觉图像处理算法以及运动追踪算法,对信息处理技术在机器人视觉中的应用进行了探讨和研究。     

机器人手臂控制系统的设计与研究

机器人在工业上已经取得了非常大的进步,尤其是视觉传感器的应用对于机器人的智能化有很大的帮助。基于DMC5480运动控制卡,通过视觉处理系统实现了RS232串行通信,设计了一套可识别机器人手臂的精准定位系统,详细研究了控制系统硬件,规划了控制系统控制策略,编写了上位机操作软件。最后设计了一套带视觉识别的象棋机器人手臂。实验结果表明,机器人手臂可以代替人手功能在工作区域内沿任意轨迹运动。     

机器视觉算法在码垛机器人中的应用

机器视觉是机器人应用的一个重要方向,码垛机器人已经越来越多的应用在物流生产线的各个方面,但是普通的码垛机器人无法适应现代物流仓储种类多、位置偏差大的特点。介绍了一种应用机器视觉实现柔性生产的码垛机器人系统,该系统主要由机器人系统、机器视觉系统、夹手工具、传输线、工控机系统、位置传感器等组成,关键技术包括码垛机器人码垛算法和机器视觉系统标定算法的实现,并编写了相应的算法程序和控制程序,经过严格测试可适应传输线上不同种类、不同位置的货物类型,并实现对这些货物的自动判断,适应货物位置自动调整并实现自动抓取货物。目前该系统已经在学校的物流实训室得到了应用,满足了学校教学的要求,对工业生产有一定的指导作用。     

机器人视觉系统处理方法及相关理论

本文主要介绍了机器人视觉系统的基本组成,并在此基础给出了在构建一个实际的视觉系统所涉及到的主要算法。从机器人视觉系统的彩色图像预处理、彩色图像分割、图像识别等视觉处理方面进行了理论性的论述。     

基于机器视觉的目标跟随六足机器人

针对智能机器人控制领域的机器视觉中的目标跟踪问题与机器人运动控制方法研究,设计实现了一款基于机器视觉的目标跟随六足机器人,该系统的机器视觉目标跟踪算法为TLD(tracking-learning-detection)算法,采用stm32嵌入式处理器驱动32路舵机控制板控制机器人运动,并设计实现了一种小型自动火控装置用于锁定目标后的定位打击.该系统融合了六足机器人运动学和机器视觉目标跟踪技术,对六足机器人步态进行研究,根据目标视觉导航,精确锁定目标,对目标进行瞄准打击做出了详细的设计实现工作.     

机器人足球视觉系统研究与实现

在机器人足球比赛这项综合性的高技术对抗活动中,快速准确地识别足球和机器人是决策系统的基础.提出一套机器人足球视觉软件系统的设计实现方案.采用直接TUV颜色模型输出,目标阈值建立采用手动和自动方式.利用颜色标志设计的对称性,改进累加取平均算法和旋转搜索算法,采用改进跟踪搜索算法进行目标搜索,提出智能组合算法思想.实验测试系统达到30帧/s处理速度,目标搜索准确性达到95%以上.     

机器人足球视觉系统研究与实现

在机器人足球比赛这项综合性的高技术对抗活动中,快速准确地识别足球和机器人是决策系统的基础.提出一套机器人足球视觉软件系统的设计实现方案.采用直接TUV颜色模型输出,目标阈值建立采用手动和自动方式.利用颜色标志设计的对称性,改进累加取平均算法和旋转搜索算法,采用改进跟踪搜索算法进行目标搜索,提出智能组合算法思想.实验测试系统达到30帧/s处理速度,目标搜索准确性达到95%以上.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…