A switching device for a high resolution multidimensional gas chromatograph and a method of supplying a constituent from a component of a sample in a gas chromatograph effluent to a mass spectrometer. A series of open-split interfaces are interposed between a series of gas chromatographs having gas chromatographic columns with different liquid phases. An inert auxiliary fluid such as helium is supplied to the interfaces for carrying the effluent through the various stages of the device. A transf...

In a system where a signal constellation is used for data communications, signal points in the signal constellation are selected to represent incoming data. The signal points, thus selected, are transmitted through a channel. The signal constellation is divided into a plurality of regions each including an equal number of signal points. A coding scheme is employed to ensure that signal points within any one region are selected equiprobably, and the probability of selecting any signal point in on...

A trellis-coded modulation system is provided in which the output of the trellis encoder is used to select a subset of a multidimensional QAM constellation. The selection process is performed such that a) the minimum square Euclidean distance between valid sequences of successive selected subsets is maximized, b) the resulting code is rotationally invariant, and c) the selected subset corresponding to a transition of the trellis encoder from a present state i to a different next state j is diffe...

A system which provides a means for reproducing stereophonic prerecorded sound which greatly improves the quality of the reproduced sound which the listener hears is disclosed. The sounds reproduced through the system of the present invention closely emulate the sounds as originally generated by the sound source, particularly with regard to the locations of the sound sources relative to one another. Through the method and apparatus of the present invention, the sounds emanating from the sound tr...

A data display system and method that provides for creation of multidimensional data displays in which the dimensions have one or more dimension elements and the display has display cells at dimension element intersections. Provisions are made for allowing rearrangement of display dimensions, reordering of display elements, and sorting within any dimension along with the maintenance of topological formulas during insertions, deletions, sorting and rearrangements. Further included is provision fo...

The disclosure relates to the recognition of sequences of multidimensional images and, notably, of image signals. The disclosed device includes, for each of said sequences to be recognized, a first circuit for the correlation of vectors representing the signal with a masking vector determined from the vectors representing the sequence to be recognized, producing a series of values corresponding to the degree of similarity of the two correlated vectors, a second circuit for the correlation of a s...

Multidimensional quantum-well arrays are made by electron-beam lithographic atterning, followed by solid-state diffusion.

The specification discloses a method and system wherein an operator interacts with an automatic data processing and display system to classify and sort subsurface reflective surfaces or segments in a multidimensional context. The technique utilizes a properly programmed general purpose digital computer in combination with a plurality of storage tube display screens. Seismic reflection data in the form of computer picked reflection segments, hereinafter referred to as seismic segment data, produc...

Retrieving multidimensional data from a data source and displaying the data in a familiar and pre-existing user interface automatically propagates user-created formulas thereby eliminating the need for users to re-enter formulas. A data representation of the multidimensional data is sent to a query processor which creates row and column structures. These structures are manipulated based on a user action, such as zoom-in, and a multidimensional data output tree showing a hierarchy of the multidim...

A method of quantizing a multidimensional sampled signal including at least one multidimensional sample of given dimension N, the sample or each sample including N components, includes the steps of, for each sample, transforming each component into a set of transformed coefficients in N known numbering bases, combining the sets of transformed coefficients and progressively quantizing the combination of the sets of transformed coefficients. For combining the sets of transformed coefficients it in...