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For analyzing the effects of the uncertainties of the fuzzy failure criterion and the input variables on fuzzy failure probability, the moment-independence importance measure (MIIM) model on the fuzzy failure probability for the fuzzy state structural system is proposed. Firstly, according to the fuzzy random theory, the fuzzy failure criterion is transformed into the equivalent additional random...
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...
In the paper invariant method of evaluation of the functional (output) characteristics when designing devices is discussed and recommended to use. The method is particularly useful in the development of electronic devices for various purposes.
The estimation of environmental contours of extreme sea states characterized by significant wave height and energy period for the purposes of reliability-based offshore design is a problem that has been tackled in many different ways. Many of the methods used to generate such contours rely on parametric approaches that require an a priori assumption of the relationship between the variables of interest...
In recent years, LEDs are widely adopted as a new light source in various applications. Among the many advantages of LEDs over traditional light sources, one key advantage is its long lifespan which substantially reduces the overall maintenance cost. Nevertheless, such characteristic causes various difficulties in the prediction of lifespan and reliability assessment. The lifespan of LEDs can be predicted...
We show that the existing variants of marginal participation approach may not be truly efficient in cost-allocation. In some approaches cost-causality is compromised, while in the other approaches, economic slack bus selection is not fair. This could lead to aberrations like price volatility, negative nodal prices, price signals that do not promote usage of lightly loaded sub-networks (and vice-versa),...
In this paper, we propose a Skyline service selection approach based on QoS prediction. We first consider the QoS history records as time series and predict the QoS values by using Autoregressive Integrated Moving Average (ARIMA) model to provide more accurate QoS attributes values. And then we calculate the uncertainty of the prediction result by adopting an improved Coefficient of Variation. In...
Real-time actuation of scheduled reserve capacity in power system operations with high penetration of wind power is prone to failure on account of unexpected shortcomings in network transfer capability. In this paper, a graph partitioning-based reserve zoning method is incorporated into the security-constrained unit commitment to improve the deliverability of operating reserves in a reserve zone and...
In the present scenario of restructured power system, there is necessity for accurate quantification of Available transfer capability (ATC). ATC can be determined appropriately by exact calculation of marginal components of Total transfer capability (TTC). One of the margins we are concerned with is Transmission reliability margin (TRM). Accurate estimation of TRM ensures reliable power transactions...
Visual Background Extractor (ViBe) is a video moving object detection method with simple implementation and fast speed. ViBe uses a detection threshold (neighborhood size) to judge whether a pixel belongs to the background or the foreground. However, in some complicated scenes, the belongingness of the pixels is ambiguous. One cannot well perform the object detection using the ViBe with a single threshold,...
Automated riving is becoming the focus of various research institutions and companies. In this context, road estimation is one of the most important tasks. Many works propose to realize this task by employing one or multiple of the following orthogonal information sources: road markings from optical lane recognition, leading vehicle, digital map. etc. Each of them has its own strength and drawbacks...
Estimation of bus travel time is one of crucial issues for passengers to let them know their departure time and arrival time at the destination, and to reduce their waiting time at the bus stop. Furthermore, it can also help to promote the development of city public transportation. To estimate bus travel time, it is worth of knowing whether target routes for passenger's travel is unstable or not,...
Text-based information from human sources contains not just content, but also clues to where the information originated from as well as how strongly the writer believes in that information. That is, the actual content of HUMINT may be from direct observation by the writer or derived through inference by the writer, or the writer may be passing on information which has come from another source. Along...
This paper describes a reasoning approach to decision making with uncertain heterogeneous (soft and hard) information of variable reliability based on belief-based argumentation. Arguments are built to support or refute a set of hypotheses about the situation of interest. Beliefs in the arguments are fused and used for decision making. The fusion process is complicated by different models used for...
Spinning reserve (SR) allocation problem is of vital importance in maintaining power systems security and reliability. Considering forecast uncertainties, unit commitment problem and contingencies on the failure of transmission lines, a general probabilistic model for expected total cost is established and its corresponding solution for optimal SR allocation strategy is proposed. The objective function...
There are various undergoing efforts by system operators to set up an electricity market at the distribution level to enable a rapid and widespread deployment of distributed energy resources (DERs) and microgrids. This paper follows the previous work of the authors in implementing the distribution market operator (DMO) concept, and focuses on investigating the clearing and settlement processes performed...
Supplier selection is a process in which one supplier is selected out of given suppliers on the basis of certain features such as reliability, maintainence, delivery performance, quality etc. Nowadays, supplier selection problem is a big issue because selection of the best supplier is a multi-criteria decision making (MCDM) problem under many combating criteria. The knowledge of the decision makers...
Multidisciplinary design optimization (MDO) under uncertainty is increasingly being recognized in improving the performance, safety, and reliability of aerospace vehicles. However, the solution process is still challenging, especially in multi-objective optimizations. In this study, a multi-objective alliance algorithm (MOAA) is employed and corresponding computational heuristics are presented, including...
The electric power industry heavily relies on software tools for planning and operation. Some of these tools are widely adopted by utilities. It is foreseen that the industry will continue to use these tools until the next generation of grid analytical tools becomes available and mature. These tools, however, were usually designed to perform deterministic studies or limited probabilistic analyses...
Traditional transmission planning for electric power systems involves analyzing certain system conditions for a number of contingency events based on deterministic criteria. This paper discusses the motivations for ERCOT to explore probabilistic approaches in transmission planning and presents the potential applications of probabilistic planning methods that ERCOT is currently investigating. It also...
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