This paper summarises the main results of 10 years of research and development in Humanitarian Demining. The Hudem project focuses on mine detection systems and aims at provided different solutions to support the mine detection operations. Robots using different kind of locomotion systems have been designed and tested on dummy minefields. In order to control these robots, software interfaces, control algorithms, visual positioning and terrain following systems have also been developed. Typical data acquisition results obtained during trial campaigns with robots and data acquisition systems are reported. Lessons learned during the project and future work conclude this paper.
Field dependence/independence (FDI), refers to one's preferred style in perceiving one's surroundings, either analytically and individually, or globally and collectively, and has been a popular topic in recent cross- and within-culture research. Previous researchers have suggested that members of individualist and collectivist cultures differ in the degree to which they perceive objects either analytically and context-independently or holistically and context-dependently. Cross-culture variation in FDI has been thoroughly studied, whereas within-culture investigations have seldom been undertaken. We explored the within-culture variation of FDI with 593 Chinese colleague students, via administering the Embedded Figures Test. As we predicted, results showed that participants from the more individualist north China area exhibited stronger degrees of field independence than did their more collectivist southern counterparts. We have supported and extended the notion that culture affects individual experiences on a basic perceptual level with new within-culture data.
Background: Traditional manipulator requires professionals to write control programs for specific job requirements so that the end-effector of manipulator can work according to the set trajectory. However, the efficiency and automation of offline programming are not high. With the diversification of job requirements, the complexity of the work environment gradually increased, the relevant scholars focused their research on the automatic trajectory planning method of the manipulator, study an optimal trajectory without collision and with high efficiency is designed automatically under the complex environment. By adding constraint conditions, the hybrid optimal trajectory with parameters such as time, energy and impact can also be obtained. These researches are conductive to improve the degree of automation and working efficiency of manipulators, and powerfully promote the development of intelligent manufacturing. Objective: Providing references for researchers from related fields by reviewing recent advances of the manipulator trajectory planning. Methods: This paper reviews the latest patents and current representative articles related to manipulator trajectory planning. The key methods of the researches in references are introduced in several aspects of the algorithm, innovation and principle. Results: The research on manipulator trajectory planning in recent 10 years is reviewed. The differences between algorithms in latest patents and articles are introduced and analyzed. The future developments and potential problems about manipulator trajectory optimizing are discussed. Conclusion: The manipulator trajectory planning reduces complicated and hard programming tasks for operators, improves the intelligence of robots and the work efficiency. Current researches focus on collision-free, parameter-optimized and high-efficiency solution which can be used to solve the problem of the end-trajectory planning of the manipulator in the complicated space with obstacles. The aspect that need to be improved in the future include: algorithm reliability, operational security and intelligence, human-computer interaction, efficient simulation, and so on. More patents on manipulator trajectory planning should be invented.
We designed a type of acoustic waveguide supported by spoof acoustic surface waves. The effective refractive index of acoustic waveguide can be effectively tuned by tailoring the waveguide width to control the propagation of spoof acoustic surface waves. Based on the advantage of the tunable refractive index, we construct a discrete waveguide array with transverse refractive index gradients to simulate the time evolution of the probability waves of electron in a tight-binding lattice under an external electric field. Based on numerical simulations and experiments, we discuss the relationship between the spatial Bloch oscillations period and the transverse refractive index gradient. Furthermore, we also investigate the influence of the interval between waveguides on the amplitude of the Bloch oscillations. Our acoustic waveguide array maybe provides a versatile testbed to explore analogous quantum mechanical effects, such as Zener tunneling, Anderson localization, and massless Dirac dynamics in acoustic system.
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