The oriented strip packing problem is very important to manufacturing industries: given a strip of xed width and a set of many (> 100) nonconvex polygons with 1, 2, 4, or 8 orientations permitted for each polygon, nd a set of translations and orientations for the polygons that places them without overlapping into the strip of minimum length. Heuristics are given for two versions of strip packin...

In this paper a three-dimensional reconstruction of flow field in a tunnel with the Hump profile is presented. The reconstruction is always performed for pair of 2D vector maps obtained by 3D PIV with two cameras which record measurement area from different locations. Three-dimensional reconstruction can be obtained in various ways. This paper summarizes two: the reconstruction based on the kno...

The contribution of this paper is a comparison of the state-of-the-art of academic research on and commercial software for modelling and solving vehicle routing problems. To this end, the paper presents a compact review of vehicle routing literature and an overview of the results of a recent study of commercial vehicle routing software systems with respect to the problem features these systems ...

This document contains additional comparisons of our approach and commercial software [1] on large real-world datasets. 1 Additional ExperimentsSection 2.3 of the paper introduced commercial software [1] as a state-of-the-art technique of pipe-run reconstruction. We purchased a license and used theirautomatical pipeline to reconstruct pipe-runs from the same dataset in Figure11 ...

Three dimensional digital model of a representative human kidney is needed for a surgical simulator that is capable of simulating a laparoscopic surgery involving kidney. Buying a three dimensional computer model of a representative human kidney, or reconstructing a human kidney from an image sequence using commercial software, both involve (sometimes significant amount of) money. In this paper...

The purpose of this article is to introduce possibilities of assembling process by using special virtual tools from scientific field named augmented reality (AR) and their implementation on the real examples. After the introduction which sketch basic information about this mentioned scientific area, the first point quickly provides view on the current situation in AR of assembling processes. Th...

A model is built when the complexity of something we are building exceeds our ability to internalize it. Most commercial software products fit that definition. A number of modeling languages have emerged to support software development methods that are guided mainly by models of the product being built. In this issue of Strategic Software Engineering I will consider some of these languages, but...

Despite the fact that iterative solution techniques are recently gaining recognition among practitioners and finding their way into commercial software arena, the current state of the art in iterative methods remains unsatisfactory in many respects. Users of large production codes such as ANSYS, NASTRAN, ALGOR, SDRC, EMRC and ANSYS often observe many “bad” cases resulting from poorly conditione...

To study the water entry ballistic trajectory of a torpedo, the wind tunnel experiment has been done based on the similarity principle. Then the drag coefficient of the torpedo is got when it enters the water, which is amended by the introduction of continuous supercavitation factor and local cavity effect factor. The vertical plane motion equations are established to get the torpedo’s trajecto...

The paper briefly summarizes the theoretical derivation of the objective stress rates that are work-conjugate to various finite strain tensors, and then briefly reviews several practical examples demonstrating large errors that can be used by energy inconsistent stress rates. It is concluded that the software makers should switch to the Truesdell objective stress rate, which is work-conjugate t...