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This paper proposes an overall design for a smart power utilization system, and presents a realizable method based on practices in pilot districts in Chongqing. This design can effectively achieve data transmission and communication among many subsystems, while information management, monitoring, and controlling of smart power utilization districts in the subsystems are divided into different security...
In order to guarantee the power quality and the highly efficient operation of the power network, a reliable operating condition recognition system of distribution networks is necessary. To solve the problem of multi-condition recognition, an operating condition recognition system based on the workflow of decision-making tree is proposed. Big data of waveforms acquired by an online recording system...
12kV vacuum circuit breaker(VCB) is widely used in distribution system. It is important to research its state and analyze its performance changes. In this paper, several 12kV VCBs which had been in service for several years were investigated. Mechanical operate experiment was carried out on them, mechanical parameters were recorded. It was found that 7.7 percent of VCBs' closing speed was higher than...
Photoacoustic (PA) spectrum is a promising method in SF6 decomposition product detection. To develop an on-line monitoring device, a gas detection system based on PA effect was introduced. Three kinds of gases, SO2, CO2, and CF4, were chosen to test the device performance. Some experiments were conducted to get the relationship of PA signal and gas concentration. The minimum detection limit of each...
In vision-based autonomous landing, the accuracy of GPS signal and the efficiency of target tracking and detecting will affect the performance in autonomous landing system. This paper presents a method of cooperation among two aerial mobile robots at high altitude and low altitude for autonomous navigation and landing. Fully utilizing the extensive vision and high flexibility on the high-altitude...
Disasters are increased in number. No matter what the cause of the disaster is human or natural, the consequence is always hard and takes long time to deal with if only human labor is used. Robotic systems are used more and more in search and rescue mission to shorten the time as well as reduce the danger for human. Mobile robot system faced difficulties of uncertainties in sensor system, unstructured...
Over past few decades, the society has seen the stunning transformation of low birth rate and dual-earner households. As a result more and more robots are design for helping people at home. However, most of them are design for specific tasks. This paper proposed an intelligence service robot aim to cope with wide range application in home. To let the robot move freely in home environment and reach...
The autonomous navigation of the mobile robot in an unknown, unstructured and dynamic environment is one challenging problem. An intelligent behavior control system based on fuzzy logic algorithm is proposed for an autonomous mobile robot to traverse through various terrains as slope, maze, and dynamic obstacle and dock station. A hierarchical structure consists of the main high-level navigation controller...
There has been an increasing interest in remote sensing and analysis of the environment. The applications include disaster monitoring, exploration, and natural resource protection. However, the human operation is labor intensive, time consuming and hazardous. The sensors fixed on-site in the environment suffer from limited sensing coverage and still requires human's on-site installation and maintenance...
With rapidly changing of technology, there are more and more robotic applications in household security. Security patrol with human in charge is high labor cost as well as shortage of human resource. Mobile robot can solve some of these problems but it faced difficulties of uncertainties in sensor system, unstructured environments, or lack adaptive ability to situation and dynamic environments. This...
As one of the most advanced techniques in the field of underwater acoustics, synthetic aperture sonar(SAS) has a very broad application prospect. This paper studies its application based on the range Doppler algorithm(RDA) in synthetic aperture radar(SAR). Thus, this paper processes the echo signal of point targets through the three modules(range compression, range cell migration correction and azimuth...
Pattern Mining is a popular issue in biological sequence analysis. With the introduction of wildcard gaps, more interesting patterns can be mined. In this paper, we propose a new definition related to pattern frequency, under which the Apriori property holds. We define a pattern mining problem called Ming top-K Frequent Patterns (MFP), where gaps are mined instead of specified. Compared with existing...
In this paper we proposed a visual servoing system for mobile robot navigation under omnidirectional vision and used an eye-to-hand camera to do color configuration. We used only one fixed camera to provide the picture for the global path planning. The image is captured by the omnidirectional camera mounted on the ceiling followed by camera calibration, image processing, path planning and target detection...
World Health Organization estimated that over 1 billion people are living with some form of disability. Some 110 to 190 million people live with significant disabilities. The number of guide dogs is far lower than the demand and only few visually impaired have access to qualified guidance dogs. This paper present an autonomous mobile robot system aimed for the service to the blind. The system includes...
A considerate amount of literature has been published on small and low altitude aerial mobile robot navigation. The autonomous tasks include trajectory tracking, hovering, goal seeking, object approach, formation keeping and landing etc. Many algorithms have been proposed to navigate the aerial robot in the uncertain, unstructured and dynamic environment. However, how to emulate the actual aerodynamic...
The eye-in-hand and eye-to-hand visual servo configuration both have its own merit and limitation. Eye-in-hand configuration provides more precision but less sight of scene covered. Eye-to-hand configuration is on the contrary. PBVS (Position Based Visual Servo) control suffers from its high sensitivity to model inconsistencies and task conditioning. IBVS (Image Based Visual Servo) control suffers...
The time delays on the networked control system and the sensor uncertainties are the major factors affecting the performance of the autonomous mobile robot navigation in an unstructured, unknown and dynamic environment. A hierarchical, decentralized and networked control system is proposed that consists of a high-level navigation control module and a remote low-level closed-loop motion control module...
In semiconductor manufacturing, all up-to-date tool commonality analysis (TCA) algorithms for yield diagnosis are based on greedy search strategies, which are naturally poor in identifying combinational factors. When the root cause of product yield loss is tool combination instead of a single tool, the greedy-search-oriented TCA algorithm usually results in both high false and high miss identification...
Association rule-based tool commonality analysis (ARBTCA) is an effective approach to identifying tool excursions for yield enhancement in semiconductor manufacturing. However, missing values which frequently occurred will lead to high rates of false positive and false negative. Incorrect identification of root cause of yield loss will lose engineer's trust on TCA and delay the process improvement...
To detect early prostate cancer, physicians usually apply the color Doppler ultrasound imaging to visualize prostate. Since color Doppler ultrasound imaging provides blood flow information, differentiating the malignancy from benign prostate diseases by inspecting Doppler spectrum is not difficult. However, it is hand-held, time-consuming, and only limited in a small and static region, which might...
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