It is shown how port-based modeling of lumped-parameter complex physical systems (multi-body systems, electrical circuits, electromechanical systems, ..) naturally leads to a geometrically defined class of systems, called port-Hamiltonian systems. These are Hamiltonian systems defined with respect to a power-conserving geometric structure capturing the basic interconnection laws, and a Hamilton...

Combined differential-mode and common-mode (mixedmode) scattering parameters (s-parameters) are well adapted to accurate measurements of linear networks at RF and microwave frequencies. The relationships between standard s-parameters with two-port vector network analyzer (VNA) and mixed-mode s-parameters with four-port VNA are derived in this paper. An example differential structure was measure...

With the deepening of the Supply Chain Management (SCM) thinking, the port is gradually applied the relevant theory to develop its logistics model. This paper uses the theoretical and empirical analysis method, summarizes and compares the existing development models of port logistics, and then proposes that the Supply Chain Model (SC-Model) is an important trend in the development of port logis...

Globalization and transport revolution, logistics integration, and the consequent expansion of port area and hinterland in the maritime industry have redefined the functional role of ports in supply chains and have generated a new pattern of freight distribution. This phenomenon again requires a new approach towards port development and related urban planning. Such changes have inevitably influ...

This work is devoted to a force control strategy of a class of standard mechanical systems in the port-Hamiltonian framework. First, a coordinate transformation is applied to equivalently describe the original port-Hamiltonian system in a port-Hamiltonian form which has a constant mass-inertia matrix in the Hamiltonian. Then, we show how to derive an extended port-Hamiltonian system with struct...

Personal computers can be connected to peripheral devices using ports. Each port has an address of itself that is specific to it and is only accessed when called by the CPU. Different types of ports have different data carrying capacities. The fastest port available on present day PCs is the thunderbolt port. This review paper is dedicated to the understanding of the history, structure, uses an...

A novel design of compact six-port circuit is proposed for millimeter-wave integrated system design. All the structure is based on the use of an elliptic coupler with certain geometrical characteristics. The prototype circuit occupies only 66.5 % of the size of the conventional six-port junction at the same frequency. To examine the performance of the proposed circuit, the six-port using multil...

In recent work a class of quasi port Hamiltonian system expressing the first and second principle of thermodynamics as a structural property has been defined: Irreversible port-Hamiltonian system. These systems are very much like port-Hamiltonian systems but differ in that their structure matrices are modulated by a non-linear function that precisely expresses the irreversibility of the system....