Let C be a q-ary code of length n and size M , and C(i) = {c(i) | c = (c(1), c(2), . . . , c(n)) ∈ C} be the set of ith coordinates of C. The descendant code of a sub-code C ′ ⊆ C is defined to be C ′ (1) × C ′ (2) × · · · × C ′ (n). In this paper, we introduce a multimedia analogue of codes with the identifiable parent property (IPP), called multimedia IPP codes or t-MIPPC(n,M, q), so that giv...

Discrete-time optimal control problems arise naturally in many economic problems. Despite the rapid growth in computing power and new developments in the literature, many economic problems are still quite challenging to solve. Economists are aware of the limitations of some of these approaches for solving these problems due to memory and computational requirements. However, many of the economic...

This paper deals with the extension to sampled-data stabilization of strict feedback dynamics of the Immersion and Invariance procedure proposed in Astolfi and Ortega [2003]. A direct digital approach is developed in two steps: first the target dynamics and immersion mapping are defined for the equivalent discrete-time model; then the control law is built to drive the dynamics towards the invar...

Synthesis of robots may be decomposed into two processes: structural synthesis (determine the general arrangement of the mechanical structure such as the type and number of joints and the way they will be connected) and dimensional synthesis (determine the length of the links, the axis and location of the joints, the necessary maximal joint forces/torques,. . .). The performances that may be ob...

This paper presents experimental results of a nonlinear torqueux optimal control for induction motor drives. This controller, minimizes the stored magnetic energy and the coil losses, while satisfying torque tracking control objectives [2]. The optimal control calculates and imposes time-varying (torque-reference depending) rotor ux norms. The controller is a cascadebased scheme with tree main ...

This paper develops a novel positive model of informal contracting in which rewards and punishments are not determined by an ex ante optimal plan but instead express the ex post moral sentiments of the arbitrating party. We consider a subjective performance evaluation problem in which a principal can privately assess the contribution of an agent to the welfare of a broader group. In the absence...

Abstract—This paper deals with a variable speed device to produce electrical energy on a power network, based on a doubly-fed induction generator (DFIG) used in wind energy conversion systems. In the first place, we developed a model of the doubly fed induction machine. In order to control the power flowing between the stator of the DFIG and the power network, a control law is synthesized using...

In this work, the decentralized control law proposed in [Sabattini et al., 2011b] for multi-robot connectivity maintenance is enhanced by means of a selective action. The idea is to identify critical agents, i.e. agents for which a disconnection might cause the split of the communication graph, and limit the control action to those agents. The objective is twofold: to reduce the control effort ...

In this paper, a modular microactuator based on shape memory alloy (SMA) actuation to drive the joints of a microgripper is described. Its design is a combination of two SMA actuators installed on the links of a special mechanism : one of them drives the rotation of the joint and the other one produces the necessary force to manipulate objects. An accurate model of the thermo-mechanical behavio...

Indifference-zone-selection procedures have been widely studied and applied to determine the required sample sizes for selecting a good design from k alternatives. However, efficiency is still a key concern for application of simulation to ranking and selection problems. In this paper, we present a new approach that can further enhance the efficiency of indifferencezone-selection procedures. Ou...