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new device for hot-line sweeping of post insulators in substations is introduced. The installation is composed of a sweeping actuator, an insulated transmission mechanism, a steering mechanism, a hydraulic driving device, anti dropping device, hydraulic mechanical arm, telescopic arm and a moving chassis insulation‥ And can complete the sweeping work of insulator under the condition of hot-line.
In this paper, a broad angle reflectarray is designed which can scatter the normal incident wave to a large angle (up to 60°) from the normal direction of the planar reflectarray to eliminate the blind areas of the base station in wireless communication scenarios. In our research, a novel individual element which is composed of a dipole with interdigital gap structure printed on a single-layer substrate...
In this paper a system level analysis and implementation of two-layer mobile wireless sensor network architecture is proposed for tracking and environmental supervision applications. It uses a mobile Master Sensor Node (MSN) that collects information inside a Sensor Area Network (SAN) where many semi-passive Slave Sensor Nodes (SSN) are deployed. The collected information is sent through a Wireless...
In large-scale object tracking wireless sensor networks, multiple mobile nodes will bring large amount of communication overheads in maintaining the accuracy of localization tracking, which would possibly affect the collection and dissemination of the tracking data, seriously. Existing seminar works purely focus on achieving optimal tracking accuracy and suffer from large amount of protocol overhead,...
This paper proposes a novel dual frequency selective reflectarray that can control reflected beams independently at dual frequencies using two different polarizations. The reflectarray improves propagation by controlling the scattered beams to achieve high speed in broadband wireless mobile communication systems at a high frequency. The reflectarray comprises cross-dipole arrays and double square...
According to the requirement of characteristics of large-scale 3D coordinates on-line measurement system, a method of mobile 3D coordinates measurement camera internal parameters self-calibration was presented in this paper. Through measurements of multiple stations, sufficient pictures of coded targets and un-coded ones were obtained. And a bundle adjustment calibration method based on collinear...
Traffic forecasting is an important task which is required by overload warning and capacity planning for mobile networks. Based on analysis of real data collected by China Mobile Communications Corporation (CMCC) Heilongjiang Co. Ltd, this paper proposes to use the multiplicative seasonal ARIMA models for mobile communication traffic forecasting. Experiments and test results show that the whole solution...
With the evolution of mobile communication networks, three-dimensional graphics applications and services are fast developing fields in mobile graphics and wireless networks. While the data size of 3D meshes is increasing, the available bandwidth of wireless networks and the weak resources of mobile devices have become relatively limited. The transmission of graphics multimedia over wireless networks...
This paper proposed a scheme of using rail-free multifunctional robot in onsite repair of hydraulic turbine blade for large-scale axial-flow and Francis runners. The robot processes such functions as profile detection and measurement, air-gouging cleaning, grinding, welding and so on. The robot's main body is composed of an all-position rail-free mobile platform and a multiple degree-of-freedom (DOF)...
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