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Spatial data mining mainly includes the process of extracting implicit knowledge, spatial relationships and the meaningful features or patterns from spatial database. The operation and management of power system consist of a large amount of spatial information, and the spatial data mining provides a powerful tool to process the massive spatial data. This paper discusses the spatial data mining technology,...
The importance of regression testing in assuring the integrity of a program after changes is well recognized. One major obstacle in practicing regression testing is in maintaining tests that become obsolete due to evolved program behavior or specification. For mobile apps, the problem of maintaining obsolete GUI test scripts for regression testing is even more pressing. Mobile apps rely heavily on...
A repairable system model which is consisted of two redundant robots and one safety unit is established in this paper. We are devoted to discussing the unique existence of the solution and the stability of the studied system by analyzing the spectrum distribution of the system operator in detail. Thus we can obtain stability analysis of the studied repairable system. Finally, some reliability indices...
Distributed storage systems provide large-scale reliable data storage services by spreading redundancy across a large group of storage nodes. In such big systems, node failures take place on a regular basis. When a node fails or leaves the system, to maintain the same level of redundancy, it is expected to regenerate the redundant data at a replacement node as soon as possible. Previous studies aim...
At present, many equipment maintenance support information management systems have been developed. Most of information management systems are developed by different departments. This paper puts forward the method based on domain ontology for eliminating conflict in different departments, different systems and different applications. Authors analyze the problem in the field of Equipment Maintenance...
Distributed storage systems (DSS) play an important role in data storage applications, since they provide high reliability for huge data storage requirement. As node failures are frequent in a large distributed storage system, the performance of repairing node failure causes many researchers' interests. In this paper, we propose a distributed storage code to minimize the coding complexity during the...
Based on the definition of spare parts deployment efficiency, factors influencing of deployment efficiency were analyzed; spare parts fill rate and utilization rate were introduced for measuring spare parts deployment efficiency. Spare parts utilization rate was calculated using Closed Jackson Queuing networks, while spare fill rate was figured out using Dynamic equilibrium equation of Logistics....
In order to analyze the impact of multi-functional support equipment failure, tasks of multi-functional support equipment during maintenance process were described, and maintenance plan of multi-functional support equipment was taken into consideration. Maintenance support process model considering multi-functional support equipment failure was put forward, and thereafter a simulation model was built...
Analysis on materiel support process considering failure of support equipment was presented. Basing on queuing system of priority, a virtual costumer which has a priority in service was created representing support equipment failure. Maintenance process model considering support equipment failure was established. Comparing to traditional models, the impact of support equipment failure was revealed...
With improving the living level, the consumers start to care more about "quality" than "quantity" of agricultural products. To investigate 491 farmers in Sichuan Province, the paper analyzes comparatively training content, fixed-point samples, different areas and training influence. The training content focuses on pesticide purchase, label reading, personal protection, container...
The popular mathematical and simulation methods both have some shortage in evaluating the stationary operational availability. The former assumes that the item demand is independent of the operating systems, which can introduce a serious underestimation of the operational availability. The latter in order to get acceptable confidence level requires a large of trials under the pre-assigned scenario...
A boiler maintenance robot which is equipped many kinds of operation devices is proposed. This robot has compact size and can be used to do works of ash cleaning, slag purging, thickness measurement and symbol marking for boiler water-cooling tubes maintenance in one work cycle. The robot can move smoothly on the tube-wall using double magnetic tracked mechanism which is designed specially. In this...
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