The characterization of NDE transducers involves an assessment of the bidirectional acoustoelectric conversion between electrical and acoustic terminals and an evaluation of the near and farfield radiation patterns. The internal details of the transducer are largely unknown and, consequently, the traditional techniques for analyzing the structures cannot be applied. Instead, the transducer may ...

Irreversible port Hamiltonian systems are a class of pseudo Hamiltonian systems that expresses both the conservation of energy and the irreversible entropy production as a structural property. These systems encompass a large class of irreversible themordynamic systems, such as heat exchangers and chemical reactors, and also multi-energy systems such as coupled mechanicthermodynamic systems. In ...

This paper presents an alternative approach for dynamic partial self-reconfiguration that enables a Field Programmable Gate Array (FPGA) to reconfigure itself dynamically and partially through a parallel configuration access port (PCAP) under the control of the stand alone PCAP core within the FPGA instead of using an embedded processor. The reconfiguration process is accomplished without an in...

A three-dimensional (3D) geometry model of twin screw expander has been developed in this paper to measure and analyze geometric parameters such as groove volume, suction port area, and leakage area, which can be described as functions of rotation angle of male rotor. Taking the suction loss, leakage loss, and real gas effect into consideration, a thermodynamic model is developed using continui...

In this paper we consider the problem of designing a container liner shipping feeder network. The designer has to choose which port to serve during many rotations that start and end at a central hub. Many operational characteristics are considered, such as variable leg-by-leg speeds and cargo transit times. Realistic instances are generated from the LinerLib benchmark suite. The problem is solv...

Recent work has demonstrated numerous benefits of functionally partitioning a behavioral process into mutually-exclusive sub-processes before synthesizing each process into a custom digital-hardware processor. A key problem during partitioning is minimizing the input/output pins or wires between processors. The traditional structural partitioning approach is strongly restricted by such I/O. We ...

Recent work has demonstrated numerous benefits of functionally partitioning a behavioral process into mutually exclusive subprocesses before synthesizing each process into a custom digital-hardware processor. A key problem during partitioning is minimizing the input/output (I/O) pins or wires between processors. The traditional structural partitioning approach is strongly restricted by such I/O...

This letter proposes a combined inputand crosspoint-queued (CIC) switch in which virtual output queuing (VOQ) is used at each input port. This CIC switch has a large buffer at each input port and a small buffer at each crosspoint. It does not require high-speed memory access or high-speed internal cell transmission lines. Since the performance of the CIC switch depends on the scheduling algorit...

It is shown that a theorem on essential gyrators presented by Rosenberg (1) and used in (2) claims too much and that the internal structure ofthe multiport elements ofthe system must be studied in order to be able to decide whether a gyrator is essentially contained in the system or not. Bond graph terminology is used (3H6) an d a new theorem is formulated, which provides un algorithm to decide...

The Exergetic Port-Hamiltonian Systems modeling language combines a graphical syntax inspired by bond graphs with port-Hamiltonian semantics akin to the GENERIC formalism. enables modular and hierarchical specification of composition pattern lumped distributed-parameter models. reflects first second law thermodynamics as structural properties. Interconnected hierarchically defined models multip...