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The first ideas generation of the architectural project has traditionally been carried out through sketches. Even though in recent decades models have also gained importance, their use is still restricted due to the time required to make them and their difficulty of realization when it comes to complex forms. This research argues that the use of concept models mediated by two disruptive technologies such as Immersive Virtual Reality and 3D Printing can foster the cognitive process of the ideation and configuration of the first architectural ideas. To demonstrate the hypothesis, a pilot study was conducted with 32 architecture students; 17 students created models manually and 15 used IVR and 3DP. Two observation sheets were used to collect information. The results show that in the process of generating ideas, the group that used the two technologies developed three of the four characteristics of the cognitive process better, being an undecided and slow process, then fast and continuous, and finally perceptual for reinterpretation. Also, both technologies complemented each other and favored the development of an intense, tactile, and phenomenological experience. Finally, regarding the model as a product, a better result was found in 3D-printed models in terms of two of the three characteristics, three-dimensionality complexity and materiality. It is concluded that these two technologies ideally complement each other as mediating tools for three-dimensional architectural thinking, making it possible to use the conceptual models as the first generators of the architectural idea. [ABSTRACT FROM AUTHOR]

With the development of the society, green and sustainable manufacturing becomes an important issue. Also, the need for architectural modeling's diversity becomes more urgent. To ensure environmental protection and low cost, the five-axis hot cutting system independently designed and developed by the authors is applied to the processing of EPS model. During the fabricating process, there is an interference problem between molybdenum wire and the blank. To solve this problem, the optimized algorithm is proposed in this paper. As to equipments, advanced servo motors are used to replace the existing stepper motors to ensure effective and accurate fabrication. The research is mainly composed of four parts: first, analyzing the local topological relationship with algorithm of grouping matrix; second, obtaining section contours by defining a group of discriminant conditions and outside normal vectors; third, acquiring all the cutting paths by summing every section contour in the same direction; and finally, fabricating the 3D model by using the algorithm researched. The experimental results show that EPS can be efficiently applied to fabricate architectural model with the algorithm we proposed. [ABSTRACT FROM AUTHOR]

Recent shape retrieval and interactive modeling algorithms enable the re-use of existing models in many applications. However, most of those techniques require a pre-labeled model with some semantic information. We introduce a fully automatic approach to simultaneously segment and detect similarities within an existing 3D architectural model. Our framework approaches the segmentation problem as a weighted minimum set cover over an input triangle soup, and maximizes the repetition of similar segments to find a best set of unique component types and instances. The solution for this set-cover formulation starts with a search space reduction to eliminate unlikely combinations of triangles, and continues with a combinatorial optimization within each disjoint subspace that outputs the components and their types. We show the discovered components of a variety of architectural models obtained from public databases. We demonstrate experiments testing the robustness of our algorithm, in terms of threshold sensitivity, vertex displacement, and triangulation variations of the original model. In addition, we compare our components with those of competing approaches and evaluate our results against user-based segmentations. We have processed a database of 50 buildings, with various structures and over 200K polygons per building, with a segmentation time averaging up to 4 minutes. [ABSTRACT FROM AUTHOR]

The paper summarizes the results of research on the modeling and implementation of advanced planning and scheduling (APS) systems done in recent twenty years. It discusses the concept of APS system - how it is thought of today - and highlights the modeling and implementation challenges with which the developers of such systems should cope. Some from these challenges were identified as a result of the study of scientific literature, others - through an in-depth analysis of the experience gained during the development of real-world APS system - a Production Efficiency Navigator (PEN system). The paper contributes to APS systems theory by proposing the concept of an ensemble of collaborating algorithms. Straipsnis apibendrina pastarųjų 20 metų tyrimus moderniųjų planavimo ir tvarkaraščių sudarymo (PTS) sistemų modeliavimo ir realizavimo srityje. Jame aptariama šiuolaikinė tokių sistemų koncepcija ir išryškinamos modeliavimo ir realizavimo problemos, kurias tenka spręsti jų kūrėjams. Dalis šių problemų suformuluota analizuojant literatūrinius šaltinius, kitos - apibendrinant autorių patirtį, įgytą kuriant pramoninio pobūdžio sistemą „Gamybos efektyvumo navigatorius". Darbo mokslinis naujumas yra bendradarbiaujančių algoritmų ansamblio samprata. Tai svarbus indėlis į besiformuojančią PTS sistemų teoriją. [ABSTRACT FROM AUTHOR]

We introduce a real-time interactive visual editing paradigm for shape grammars, allowing the creation of rulebases from scratch without text file editing. In previous work, shape-grammar based procedural techniques were successfully applied to the creation of architectural models. However, those methods are text based, and may therefore be difficult to use for artists with little computer science background. Therefore the goal was to enable a visual work- flow combining the power of shape grammars with traditional modeling techniques. We extend previous shape grammar approaches by providing direct and persistent local control over the generated instances, avoiding the combinatorial explosion of grammar rules for modifications that should not affect all instances. The resulting visual editor is flexible: All elements of a complex state-of-the-art grammar can be created and modified visually. [ABSTRACT FROM AUTHOR]