Let ε > 0. We prove that there exists an operator Tε : `2 → `2such that for any polynomial P we have ‖P (Tε)‖ ≤ (1 +ε)‖P‖∞, but Tε isnot similar to a contraction, i.e. there does not exist an invertible operatorS : `2 → `2 such that‖S−1TεS‖ ≤ 1. This answers negatively a question at-tributed to Halmos after his well-known 1970 paper (“Ten problems in Hilbertspace”). ...

The paper describes an application of a genetic algorithm with a variable local search operator for load balancing in energy-intensive processing of sugar beet. The variable local search operator enables the genetic algorithm to track optima of the time-varying dynamic systems. It constitutes an adaptive tracking mechanism as it is triggered only when the running average of the best performing ...

This paper describes an innovative alternative to manual procedures for the application of carbon fiber and resin injection in concrete surfaces in tunnels. It is based on a specially designed light-weight integrated tool for automatic application of Fiber Reinforced Polymer (FRP) and epoxy resin injection. Vision and laser telemeter sensing are integrated into the tool to assure precise inspec...

This paper aims to demonstrate the application of multi-objective evolutionary optimization, namely an adaptation of NSGA-II, to simultaneously optimize the assembly sequence plan as well as selection of the type and number of assembly stations for a production shop that produces three different models of wind propelled ventilators. The decision variables, which are the assembly sequences of ea...

The demand for higher data rates and improved energy-efficiency have motivated the deployment of short-range, low-cost, consumer-deployed cellular access points, referred to as femtocells [1]. Femtocells are consumer-deployed cellular access points, which interconnect standard user equipment (UE) to the mobile operator network via the end user’s broadband access backhaul. Although femtocells ty...

Electric vehicle charging stations are essential infrastructure in developing electric vehicles. In order to construct reasonable amount of electric vehicle charging stations with proper locations, a mathematical multi-level layout planning model, which aims at minimizing the initial construction investment and the users’ charging cost simultaneously, is employed in this paper. An improved gene...

This paper discusses examples, p a r t i c u l a r l y hypo the t i ca ls , t he i r use and generat ion, in legal reasoning. It examines the use of sequences of hypo the t i ca ls .

Supply security and environmental concerns associated with oil call for an introduction of hydrogen as a transport fuel. To date, scenario studies of infrastructure build-up and sales of fuel cell vehicles (FCVs) are driven by cost estimates and technological feasibility assumptions, indicating that there is a “chicken and egg problem”: Car producers do not offer FCVs as long as there are no hy...

this paper presents characterizations of m-fuzzifying matroids bymeans of two kinds of fuzzy operators, called m-fuzzifying derived operatorsand m-fuzzifying difference derived operators.