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An uncertainty model in the form of a linear fractional transformation (LFT) is composed of a nominal model augmented by an uncertainty description. The size of the uncertainty required to cover a given set of models depends not only on the set of models, but also on the nominal model. Thus, the size of the uncertainty can be minimized by choosing the nominal model optimally according to some metric...
Instrumentation of an environment with sensors can provide an effective and scalable localization solution for robots. Where GPS is not available, beacons that provide position estimates to a robot must be placed effectively in order to maximize a robots navigation accuracy and robustness. Sonar range-based beacons are reasonable candidates for low cost position estimate sensors. In this paper we...
Paramagnetic microparticles moving through fluids have the potential to be used in many applications, including microassembly, micromanipulation, and highly localized delivery of therapeutic agents inside the human body. Paramagnetic microparticles with diameters of approximately 100 μm can be wirelessly controlled by externally applying magnetic field gradients using electromagnets. In this paper,...
Design Structure Matrices (DSMs) are a widely extended and useful tool for structuring and analyzing complex systems. Though this is a simple yet quite powerful tool, problems arise in using them, especially during early development phases due to uncertain information and frequent changes within the original system. In this paper, the informative value of selected complexity metrics of DSMs for early...
In this work, several retrieval algorithms were implemented to retrieve soil moisture (sm) and optical depth (τ) from Aquarius/SAC-D observations. Currently used sm retrieval algorithms (H- and V-pol Single Channel Algorithm, SCAH and SCAV; Microwave Polarization Difference Algorithm, MPDA) were computed over Pampas Plains, Argentina. The methodology of a novel Bayesian algorithm developed is also...
This paper focuses on one of the earliest steps in System of Systems (SoS) design aiming to meaningfully determine stakeholders' values or preferences. It recommends the plural problem definition and dynamic construction of stakeholder's values in the front end of design process. It suggests a method based on the probability theory to embed flexibility and tolerance, and construct a basic framework...
Most of the researches in feature selection deal with homogeneous features that are with either numerical or categorical features. As discussed in [2] neighbourhood rough set model is one approach which deals with heterogeneous feature selection. The neighbourhood model is used to reduce numerical and categorical features by assigning different thresholds for different kinds of attributes. Recently...
In quantum mechanics it is well known that observables are represented by hermitian matrices (or operators). Uncertainty relations are represented as some kinds of trace inequalities satisfied by two observables and one density matrix (or operator). Now we try to release the hermitian restriction on observables. This is only a mathematical interest. In this case we give several non-hermitian extensions...
The test suite specification (TSS) provides organizations that are testing phasor measurement unit (PMU) performance with a suite of unambiguous test plans
A cooperative deployment strategy for effective exploration of unknown environments by micro-aerial vehicles with limited sensing is presented. The approach advances an exploration objective while optimizing localization quality to ensure stable and safe operation. The impact of heterogeneous vehicle mobility, environment sensing, and inter-vehicle range measurements on system performance is considered...
While enjoying the convenience of Software as a Service (SaaS), users are also at an increased risk of privacy breaches. Recent studies show that a Web-based application may be inherently vulnerable to side-channel attacks which exploit unique packet sizes to identify sensitive user inputs from encrypted traffic. Existing solutions based on packet padding or packet-size rounding generally rely on...
This study aims to present the effectiveness evaluation of job-shop scheduling based on TOC concept under demand variation using simulation technique. Two schedule performance measurements under uncertainty, schedule robustness and performance, are used in comparing the performance of schedule based on TOC and traditional method (minimizing Cmax). Simulation test scenarios are carried out by applying...
The universal multiple outlier hypothesis testing problem is studied in two settings. In the first setting, each outlier can be arbitrarily distributed, and the number of outliers is fixed and known. In the second setting, the number of outliers is unknown at the outset. Nothing is known about the typical and outlier distributions other than that they are different and have full supports. For the...
This paper proposes an online algorithm for active learning that switches between different candidate instance selection strategies (ISS) for classification in imbalanced data sets. This is important for two reasons: 1) many real-world problems have imbalanced class distributions and 2) there is no ISS that always outperforms all the other techniques. We first empirically compare the performance of...
The standard uncertainty evaluation is very important in instrumentation and measurement industry because it is used to communicate, compare and combine uncertainty generated by various components in a system. The analytical evaluation of uncertainty has been recognized to be important and carries many advantages from theoretical perspective. Due to perceived complexity and feasibility of mathematical...
We present a novel experimental setup for the analysis of solenoid actuators. Because the main purpose of the experimental setup is the identification and the modeling of different types of solenoid actuators (wide range of possible spool strokes), cost effectiveness and flexibility are key design principles. In solenoid actuators the relevant mechanical quantities are the position (velocity) of the...
Earned Value Management (EVM) is a broadly used performance management and feedback tool for project management. EVM enables depicting the progress in terms of scope cost and schedule. In simplest form, Earned Value concept shows what we have in a project at a specific time against what we spent. Based on the trends, it provides the prospective progress of the project and enables forecasting actual...
The high volatility of traffic patterns in IP networks calls for dynamic routing schemes allowing to adapt resource utilization to prevailing traffic. In this paper, we focus on the problem of link weight optimization in OSPF networks where the traffic is routed along shortest paths according to the link metrics. We propose an online approach to optimize OSPF weights, and thus the routing paths, adaptively...
In online social networks (OSNs), it is an open challenge to select proper recommenders for predicting the trustworthiness of a target. In real life, people who are close and influential to us can usually make more proper and acceptable recommendations. Based on this observation, we present the idea of recommendation-aware trust evaluation (RATE). We further model the recommender selection problem...
Modern software systems are often characterized by uncertainty and changes in the environment in which they are embedded. Hence, they must be designed as adaptive systems. We propose a framework that supports adaptation to non-functional manifestations of uncertainty. Our framework allows engineers to derive, from an initial model of the system, a finite state automaton augmented with probabilities...
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