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This paper proposes a non-symmetrical permanent-magnet linear motor traction system (PMLMTS), in which the primary permanent-magnet linear motor (PMLM) is employed. Four movers are mounted with same phase angles. There are nine legs, including eight independent legs and one common leg. All legs have same normal voltage but different normal currents. The normal current of the common leg is four times...
In this paper, we develop and investigate a model for the reliability and availability of multi-state degraded system with the system states represented as interval-valued numbers. That is, the system in a certain interval-valued state can provide arbitrary value of performance between the lower bound and the upper bound. The status of the system is considered to degrade with use and we consider the...
The widespread installation of distributed generation system is increasing challenges because of the potential cost and benefits. Although the cost of distributed generation is high, it can improve the reliability of power supply, reduce environmental pollution and bring more economic benefits to the society. Firstly, the impact of distributed generation on economy and reliability of distribution...
At present, the optical fiber differential protection is widely used in high voltage power grid. However, due to the limitation of technology and equipment, there are still some reasons for the normal operation of optical fiber protection. In this paper, according to the actual operation of the optical fiber differential protection, the impact of optical fiber differential protection is analysed and...
Field Programmable Gate Array (FPGA) system is widely used in deep learning application and cloud system for acceleration. Quality and reliability of IP block is essential to the successful development of today's complex hardware acceleration design. In this paper, we discuss the important issues of quality and reliability of digital soft IP, and propose a qualification measurement system that can...
JointCloud provides a large-scale, flexible, and elastic computing resource platform. Big data systems such as MapReduce and Spark are widely deployed on this platform for big data processing. How to choose a cloud platform in accordance with the need of customers is a problem. Current performance benchmarking suites can choose suitable cloud platforms for customers. However, they do not consider...
This research investigates a k-out-of-n system in which the lifetime of operational and standby components, the repair time follow continuous phase-type (PH) distribution, instead of exponential distribution or others typical distributions. The proposed paper provides an analytic reliability model that is more suitable to characterize the real situation. The stationary distribution is built by using...
With the application of a variety of high-tech, life cycle cost of aviation equipment increased substantially. For the life cycle cost of aviation equipment, the costs of using phase account for more than 50% of total costs. Therefore, the development of aviation industry call for a method to evaluate and predict the use phase affordability of aviation equipment. This paper defines the definition...
The reliability of the product is designed, manufactured and managed. Now, there are many research about product reliability in the stage of design, while the research on product reliability in the stage of manufacturing process is less. The reliability requirements determined at the design stage need to realize through the manufacturing process. So, it is an urgent matter to ensure the reliability...
Aiming at requirements of quantitative risk assessment of space utilization payloads in China's space station program, a reliability assessment approach based on probabilistic risk assessment is proposed for the high microgravity science experiment system of a payload, and a closed-loop event chain model facing task processes is given according to the process of high microgravity scientific experiment...
As a part of automatic control system of rock roadheaders, the dynamic load identification is of great significance to improve the intelligent level and increase lifetime of roadheaders. In order to solve the problems of rock roadheaders such as complicated operating conditions, difficult dynamic load real-time identification, a recognition method based on multi-neural network and evidence theory...
For piecewise planar scene modeling, many challenging issues still persist, in particular, how to generate sufficient candidate planes and how to assign an optimal plane for each spatial patch. To address these issues, we present a novel multi-view piecewise planar stereo method for the complete reconstruction. In our method, reconstruction is formulated as an energy-based plane labeling problem,...
Distribution network reconfiguration is a multi- objective and discrete nonlinear combinatory optimization problem. In this paper, a novel multi-object distribution network reconfiguration method is proposed based on system homogeneity. Firstly, the relationship between power loss and reliability of systems with different homogeneity is analyzed. Then, to enhance system reliability and homogeneity,...
Objective: To revise the autonomous learning scale that developed by Michigan State University for its applicability in Chinese, and to explore the relationship between self-efficacy and autonomous learning of medical undergraduates. Methods: The general self-efficacy scale and autonomous learning scale are used to measure the medical undergraduates. Results: (1) The scale revised of autonomic learning...
The dual-stator brushless doubly-fed induction generator-based wind energy conversion system (DSBDFIG-WECS) is promising in future wind energy development due to the merits of compact structure, low cost and high reliability. This paper makes the first attempt to compare the performance of vector control (VC) and direct torque control (DTC) based on the DSBDFIG-WECS. The comprehensive comparison results...
Retention error has been recognized as the most dominant error in MLC (multi-level cell) flash. In this paper, we propose a new approach called PISO (Programming Initial Step Only) to reduce its number. Unlike a normal programming operation, a PISO operation only carries out the first programming-and-verifying step on a programmed cell. As a result, a number of electrons are injected into the cell...
In this work, reliable electric interconnection for MEMS/NEMS devices was realized by Au/a-Si (amorphous Si) and Au/c-Si (single-crystal Si) eutectic reaction in anodic wafer bonding process. We measured different resistances of di fferent bonding areas under different bonding temperature. When bonding temperature is under 370 °C, the resistance of the different areas (from 200 µm2 to 1000 µm2) fluctuate...
Due to the unavoidable battery replacement or replenishment, diverse energy harvesting techniques have been integrated with Wireless Sensor Networks (WSNs) to overcome limited battery power and extend the network lifetime. However, variable transmission power levels based on non-uniform energy harvesting rates can incur asymmetric links. In this paper, we propose light-weight forwarding protocols...
Manufacturers are continuously pushing NAND flash memory into smaller geometries and enforce each cell to store multiple bits in order to largely reduce its cost. Unfortunately, these scaling down techniques inherently degrade the endurance and reliability of flash memory. As a result, permanent errors such as block or die failures could occur with a higher possibility. While most transient errors...
Due to the data diversity and complexity in industrial system, the accuracy of data-based modeling might be largely affected by such a series of issues. Aiming at the energy system in steel industry, this study proposes a fuzzy modeling based on Gaussian membership expression. First, in the stage of sample selection, the industrial data set is divided into a number of clusters, from which the representative...
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