Table lookup is one of the most, if not the most, important and frequently performed data processing operations. The SAS System supports this assertion with a roster of built-in searching techniques, such as merges, joins, formats, indexes, and search-specific operators and functions. It is therefore all the more surprising that until the advent of Version 9 the fastest, i.e. direct-addressing ...

The most important reef of the Mediterranean is Coralligène (Coralligenous = C), including several types calcareous algal-invertebrate build-ups growing in normal open marine conditions. We analyzed and compared two C samples from Ligurian Sea developed different environmental settings: 1) off Portofino on a rocky cliff, at depth about 40 m 2) front Bogliasco, sub-horizontal substrate 10 m. max...

Abstract The high-pressure axial piston pump is widely used in the field of coal machinery equipment due to its compact structure, high power density, and easy variable control. Failure affects performance. In this paper, sliding shoe pair plunger taken as research object, variation law oil film pressure numerically simulated by Matlab software, test bench built. full-cycle dynamic evaluation i...

This paper describes the Halo windowing system for the Angel 1, 2] operating system currently being developed at City University. The aim of this windowing system is to provide a clean parallel object-oriented design utilising the uniied resources in the single address space of Angel. Halo provides an object design for a basic window library which can then be extended (subclassed) into the GUI ...

A compact wavefront camera that allows users to quantitatively measure the intensity and wavefront at a remote object plane is reported. The camera is built from a chip-scale wavefront sensor that we previously developed. By measuring the wavefront of the image and calibrating the wavefront relationship between the image and object planes, the wavefront at the object plane can be computed and t...

As a collection of entities with common goals, supply chain (SC) has a unique system structure. Taxonomy is the mechanism for collecting, structuring, and classifying information about a system. This paper proposes taxonomy for SC system. It is built around a dynamic constraint network that describes SC relationships in time among its product, process, and resource components. SC characteristic...

This paper introduces an object recognition strategy based on the following premises: i) an object can be identified on the basis of the optical flow it induces on a stationary observer, and ii) a basis for recognition can be built on the appearance of flow corresponding to local curvilinear motion. Unlike other approaches that seek to recognize particular motions, ours focuses on the problem o...

In this paper we propose a general framework for videobased object segmentation using a new spatio-temporal Markov Random Field (MRF) model. Video-based object segmentation has the potential to improve the performance of static image segmentation by fusing information over the temporal scale. Built upon a spatio-temporal MRF model, our method offers three advantages in a unified framework. Firs...

We show how useful simulation and control applications can be built on Petri nets by adding an object-oriented transformation framework called “views”. Petri nets were integrated into the Common Lisp Object System in such a way that the usual objectoriented features, such as classes, object creation, encapsulation, and inheritance, also work for Petri nets. This modified object system allows vi...