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1.
能力风暴机器人AS-UⅡ一般是通过一种或者两种自身携带的传感器实现目标搜索,但目标位置确定比较粗糙。通过综合应用多种传感器,采用粗搜索和精搜索相结合的方法,建立随机漫游轨迹算法实现粗搜索,建立方向和位置误差算法以实现精搜索,最后设计了目标搜索程序进行了模拟仿真和实际应用试验。结果表明:搜索目标可行,目标位置确定准确,其误差与一般搜索方法相比,大大降低,达到满意效果。  相似文献   

2.
胡波 《计算机应用》2011,31(4):1047-1049
提出一种采用Bhattacharyya系数最大化并联合时空域信息的视频目标跟踪方法。时域通过卡尔曼滤波预测目标的运动信息,空域用Camshift算法精确匹配视频目标。由于运动目标机动性比较强,卡尔曼滤波预测的位置和真实位置存在较大的误差,容易导致下一步跟踪失败。采用基于Bhattacharyya系数的由粗到精的核匹配搜索方法,在卡尔曼滤波预测的位置基础上适当扩大搜索范围,通过Bhattacharyya系数最大化确定初始匹配窗口,再用Camshift算法精确匹配视频目标。实验证明该方法对机动快速运动目标具有很高的跟踪精度。  相似文献   

3.
苟平章  孙现超 《传感技术学报》2021,34(12):1676-1683
针对无线传感器网络中目标区域仅部署静态节点和移动节点时,分别存在覆盖率低和成本高的问题,提出一种基于改进萤火虫算法的覆盖优化方法。首先,将静态和移动传感器节点随机部署在目标区域内,改进位置公式和步长因子,提高全局搜索能力,加快搜索速度;其次,利用改进萤火虫算法初步确定移动传感器节点的候选目标位置;最后,通过目标位置优化方法得到节点的最佳目标位置,从而完成覆盖优化。仿真结果表明,与基于PSO算法和CS算法等启发式算法的覆盖优化相比,该优化方法能够缩短平均移动距离,提高网络覆盖率,节省节点能量,延长网络生命周期。  相似文献   

4.
未知环境下移动机器人自主搜索技术研究   总被引:1,自引:0,他引:1  
肖潇  方勇纯  贺锋  马博军 《机器人》2007,29(3):224-229
将全区域搜索技术与基于动态模板匹配的目标识别方法相结合,提出了一种适用于未知环境的目标物体自主搜索方法,实现了移动机器人在陌生环境下的目标搜索任务.具体而言,移动机器人利用声纳和全景摄像头作为传感器来感知周围环境,并利用模糊逻辑方法来进行局部路径规划,在此基础上通过全区域搜索技术实现对空间的遍历,并采用动态模板匹配方法来实现目标物体的识别及其方位的确定.本文所提出的目标物体自主搜索方法可以从任意位置开始进行,算法对于陌生环境具有良好的适应性.论文最后通过实验结果证实了算法的良好性能.  相似文献   

5.
捣固车在对有砟铁轨进行捣固时,需要提前确定下镐位置,提出了一种通过磁力传感信号来定位道钉的峰值检测算法,以准确确定下镐位置,该算法分别采用了下采样、滑动窗口、阈值分类和二次搜索等方法来实现峰值检测,并重点讨论了滑动窗口长度、下采样频率和二次搜索窗口长度等参数对算法性能的影响。实验中,采用了一组实测的磁力传感器信号来评测该算法,通过对传统方法的对比。本文算法可以将峰值检测的假阳和漏检数降为0,而最大的道钉定位误差却不会超过1cm。  相似文献   

6.
针对双目视觉系统定位精度较低的问题,提出一种基于粗-精立体匹配的双目视觉目标定位方法。该方法采用粗-精匹配策略:在粗匹配阶段使用基于Canny-Harris特征点的随机蕨算法对左右图中的目标进行识别,提取目标矩形区域的中心点,实现中心匹配;在精匹配阶段建立一种基于图像梯度信息的二值特征描述子,将中心匹配得到的右中心点作为估计值,设定像素搜索范围,于该区域中找出左中心点的最佳匹配点。最后,将得到的中心点匹配对代入平行双目视觉的数学模型中,实现目标定位。实验结果表明,在500 mm距离范围内,所提出定位方法的定位误差控制在7 mm内,平均相对定位误差为2.53%,相比其他方法具有定位精度高、运行时间短的优点。  相似文献   

7.
文章磁目标跟踪系统选用霍尼韦尔HMC1043磁传感器阵列来采集永磁体的磁场信息,并实现定位。由于磁场传感器阵列的各传感器位置、方向和灵敏度直接影响系统定位的精确度,所以要求对这些磁传感器参数进行准确的标定。文章针对磁传感器阵列的标定问题提出了目标误差函数和优化计算方法。通过对所有参数的迭代计算和优化更新使目标误差函数达到最小,完成对磁传感器的位置、方向和灵敏度等参数的标定。文章方法已对实际传感器系统实施应用。在MATLAB环境下,PC机采集目标磁体的磁场信号,通过算法计算确定所有磁传感器的位置、方向和灵敏度,完成标定。通过文章方法的标定,系统定位精度有明显的提高,本方法的可行性和合理性也因此得到验证。  相似文献   

8.
对含有障碍区域的无线传感器网络(WSNs)节点部署问题进行研究。建立节点探测模型和网络覆盖率评价方法,基于概率传感器模型提出一种部署方式,即对障碍区域进行随机布撒节点,确定区域采用量子遗传算法(QGA)寻找最优节点部署位置,实现对同构WSNs节点构成的目标区域的高效覆盖。仿真结果与GA,QGA相比:改进QGA有效提高了算法整体的搜索能力和收敛速度。  相似文献   

9.
在增强现实应用中实现对运动目标的准确跟踪是一个具有挑战性的任务。基于混合跟踪通过对多传感器信息的融合通常比单一传感器跟踪算法更为优越的特性,提出了一种新的紧耦合混合跟踪算法实现视觉与惯性传感器信息的实时融合。该算法基于多频率的测量数据同步,通过强跟踪滤波器引入时变衰减因子自适应调整滤波预测误差协方差,实现对运动目标位置数据的准确估计。通过标示物被遮挡状态下的跟踪实验结果表明,该方法能有效改善基于扩展卡尔曼滤波器的混合跟踪算法对运动目标位置信息预测估计的准确性,提高跟踪快速移动目标的稳定性,适用于大范围移动条件下的增强现实系统。  相似文献   

10.
图像传感器受到环境、镜头畸变等因素影响,采集数据存在一定误差,为了改善图像传感器采集效果,提出了基于深度学习算法的图像传感器误差自动校正方法。首先分析图像传感器误差校正的研究进展,分析图像传感器误差的影响因素,然后利用支持向量机对图像传感器偏移角度进行补偿,并采用深度学习算法根据影响因素建立误差自动校正模型,最后通过粗标定机制对传感器的响应参数进行拟合,实现图像传感器误差自动校正。实验结果表明深度学习算法可以提高图像传感器数据精度,校正后误差较小,校正速度较快,具有一定的实际应用价值。  相似文献   

11.
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.  相似文献   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.  相似文献   

13.
融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。  相似文献   

14.
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.  相似文献   

15.
This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.  相似文献   

16.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008  相似文献   

17.
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.  相似文献   

18.
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.  相似文献   

19.
《计算机科学》2007,34(4):148-148
Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.  相似文献   

20.
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.  相似文献   

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