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71.
问答系统是信息检索的高级形式,也是该领域的研究重点和热点。该文首先给出问答系统的定义,然后对现有各类问答系统进行了介绍,并对其核心技术、测评标准进行了分析,最后对问答系统的发展方向进行了展望。 相似文献
72.
73.
王小伟 《机器人技术与应用》2010,(3):39-42
策略在机器鱼水球比赛中起着至关重要的作用,本文以策略的编写为出发点,通过对机器鱼在水球比赛中路径的分析,结合机器鱼在比赛中的可能出现的实际情况,提出了一种新的策略,即"非精确"策略,接着对该策略进行了介绍,与其他策略进行了比较,并阐述了其优点。 相似文献
74.
75.
76.
环境建模技术是移动机器人自主导航研究中的一个关键问题。本文给出一种基于多传感器信息融合的环境建模方法。实验结果表明该方法有效地克服了传感器的累计误差,有效地提高了环境建模的准确性。此方法的可行性和有效性通过Pioneer3-DX移动机器人得到了实验验证。 相似文献
77.
This paper presents the development of the planar bipedal robot ERNIE as well as numerical and experimental studies of the
influence of parallel knee joint compliance on the energetic efficiency of walking in ERNIE. ERNIE has 5 links—a torso, two
femurs and two tibias—and is configured to walk on a treadmill so that it can walk indefinitely in a confined space. Springs
can be attached across the knee joints in parallel with the knee actuators. The hybrid zero dynamics framework serves as the
basis for control of ERNIE’s walking. In the investigation of the effects of compliance on the energetic efficiency of walking,
four cases were studied: one without springs and three with springs of different stiffnesses and preloads. It was found that
for low-speed walking, the addition of soft springs may be used to increase energetic efficiency, while stiffer springs decrease
the energetic efficiency. For high-speed walking, the addition of either soft or stiff springs increases the energetic efficiency
of walking, while stiffer springs improve the energetic efficiency more than do softer springs.
Electronic Supplementary Material The online version of this article () contains supplementary material, which is available to authorized users.
相似文献
R. A. BockbraderEmail: |
78.
Achieving robot autonomy is a fundamental objective in Mobile Robotics. However in order to realize this goal, a robot must
be aware of its location within an environment. Therefore, the localization problem (i.e.,the problem of determining robot
pose relative to a map of its environment) must be addressed. This paper proposes a new biology-inspired approach to this
problem. It takes advantage of models of species reproduction to provide a suitable framework for maintaining the multi-hypothesis.
In addition, various strategies to track robot pose are proposed and investigated through statistical comparisons.
The Bacterial Colony Growth Algorithm (BCGA) provides two different levels of modeling: a background level that carries on the multi-hypothesis and a foreground level that identifies the best hypotheses according to an exchangeable strategy. Experiments, carried out on the robot ATRV-Jr
manufactured by iRobot, show the effectiveness of the proposed BCGA.
相似文献
Mattia ProsperiEmail: |
79.
So far, most of the applications of robotic technology to education have mainly focused on supporting the teaching of subjects
that are closely related to the Robotics field, such as robot programming, robot construction, or mechatronics. Moreover,
most of the applications have used the robot as an end or a passive tool of the learning activity, where the robot has been
constructed or programmed. In this paper, we present a novel application of robotic technologies to education, where we use
the real world situatedness of a robot to teach non-robotic related subjects, such as math and physics. Furthermore, we also
provide the robot with a suitable degree of autonomy to actively guide and mediate in the development of the educational activity.
We present our approach as an educational framework based on a collaborative and constructivist learning environment, where
the robot is able to act as an interaction mediator capable of managing the interactions occurring among the working students.
We illustrate the use of this framework by a 4-step methodology that is used to implement two educational activities. These
activities were tested at local schools with encouraging results. Accordingly, the main contributions of this work are: i) A
novel use of a mobile robot to illustrate and teach relevant concepts and properties of the real world; ii) A novel use of
robots as mediators that autonomously guide an educational activity using a collaborative and constructivist learning approach;
iii) The implementation and testing of these ideas in a real scenario, working with students at local schools.
相似文献
Alvaro Soto (Corresponding author)Email: |
80.
一种有腿机器人步态轨迹生成算法 总被引:2,自引:0,他引:2
目前存在一类有腿机器人,由于其底层动力学控制参数难于获取,行走设计无法使用已有的控制方法,现有的基于建模的步态存在缺乏完善规划,固定规划步态与实际步态相差较大的问题,针对这个问题,提出一种使用曲线拟合生成步态轨迹的想法,通过引入遗传算法,让机器人能自主的搜索良好的行走步态轨迹,在四足步行机器人平台上取得了良好的实验结果. 相似文献