The sensor element of an imaging system should be mounted into its housing in such a way that the scene can be prop­ erly focused onto the sensor element’s focal plane over the active area. Operational imaging requirements are forcing increasingly smaller tolerances on sensor alignment, and manufacturing systems must improve alignment capability to keep pace. Imaging system designs include refe...

AGlobal Vertical Datum (GVD) is naturally defined by the geoid, and there is a well-established consensus to adopt Gauss-Bessel-Listing's definition of the geoid (i.e. as being the level surface of the Earth's gravity field that best fits the undisturbed sea level). Themain problem in defining the geoid is therefore to fix its constant geopotential (W0). Nevertheless, this definition can be int...

This paper is concerned with the control problem of networked control systems (NCSs) with piecewise constant generalized sampled-data hold function (PCGSHF). A new hybrid nonlinear NCSs model based on the PCGSHF is constructed, in which both the network-induced delay and the packet dropouts are considered in the transmission. By using a novel multi-datum point parameter method, the obtained NCS...

National Oceanic and Atmospheric Administration’s National Ocean Service uses observations, hydrodynamic models and interpolation techniques to develop many of its products and services. We examine how two projects, computation of tidal datums for vertical datum transformation and the estimation of tidal characteristics for hydrographic surveys, are being developed in Alaska and how they may be...

The measurement and assembly of the aero-engine rotor are separated from each other, which makes it difficult to keep datum consistent with datum; existence error will cause characteristic matrix fail truly reflect geometric state itself model be inaccurate, then ultimately affect accuracy prediction. Combined fact that characteristics parts/components not related datum, elimination method has ...

Pattern matching is a key concept for rule-based expert systems. Simple pattern interpreters appear in nearly every book on Lisp. Pattern matching is also a useful tool for case analyses as provided by functional languages such as ML or Miranda TM. These two uses are somewhat diierent since functional languages emphasize a discrimination based on types while Lisp, or Plasma, make use of S-expre...