VDI Verlag eLibrary

Bauingenieur

Browse Volumes: Bauingenieur

Bauingenieur Volume 98 (2023) Issue 06 ISSN Online: 0005-6650

Results in this title

Marjan Pipenbaher Pelješac bridge, Croatia – Part 2: Construction and Assembly/Pelješac-Brücke, Kroatien – Teil 2: Ausführung und Montage S. 188-196

„… ):• Parameters describing the current state of the structure (tem-perature of the superstructure, stay cables and …” „… corrosion of steel superstructure, condition of steel wires of stay cables, …).2 Construction of the …” „… concrete. This method is used for shorter piles on the approach parts of the bridge where the layers of …”

doi.org/10.37544/0005-6650-2023-06

No access

Select for citation download

Baudynamik 2018

VDI Wissensforum GmbH (ed.)

Series: VDI-Berichte

Volume 2321 2018

Results in this title

F. Pospischil, Effectiveness of Under-Sleeper-Pads – Recent S. 137-148

„… superstructure, Under-Sleeper-Pads (USP) are primarily used for ballast protection and therefore to improve the …” „… , reduce the formation of hollowness beneath sleepers, and lower superstructure settlements. However …” „… high quality superstructure system. Continue with the basis of vibration measurement interpretation and …”

doi.org/10.51202/9783181023211

Partial access

Select for citation download

Reactor network synthesis with guaranteed robust performance

Xiao Zhao

Series: Verfahrenstechnik

Volume 952 2017

Results in this title

Introduction S. 1-16

„… method with numerical optimization. Superstructure approach. The superstructure approach for reactor …” „… superstructure approach using static or dynamic optimization. The first presentation of the superstructure …” „… approach, a superstructure of a reactor network containing different candidates of connection patterns of …”

Titelei/Inhaltsverzeichnis S. I-XIV

„… , Integration of process and control system design, Superstructure approach, Eigenvalue constraints …” „… presented. The work is based on the superstructure approach and aims to find an optimal process flowsheet …” „… process design. The superstructure approach results in an optimal process flowsheet with determined …”

Case study of allyl chloride production S. 107-132

„… steady-state operating point. 6.1.1 Problem setting The superstructure shown in Fig. 3.1 is used, which …” „… consists of both PFR and CSTR. For comparison, we consider superstructures with different numbers of N PFR …” „… and CSTR. When N is an even number, the superstructure contains an equal number of CSTR and PFR. When …”

Open-loop reactor network synthesis S. 30-46

„… eigenvalue-based dynamic properties for the design of open-loop reactor networks. A structured modeling approach …” „… superstructure as a separate subsystem and then builds the flow connections to form a connected network. 30 3.1 …” „… reactor network models Fig. 3.1 shows an open-loop superstructure of a N -reactor network [87], which will …”

Summary and outlook S. 133-140

„… in the reactor network superstructure. A structured modeling procedure is proposed to formulate the …” „… open-loop model of the reactor network. Each reactor in the reactor network superstructure is modeled by a …” „… by applying the normal vector approach, which guarantees robust dynamic properties. A great advantage …”

Bibliography S. 158-176

„… ] L. Achenie and L. Biegler. A superstructure based approach to chemical reactor network synthesis …” „… programming approaches to mathematical programs with complementarity constraints. SIAM Journal on Optimization …” „… . Constructive targeting approaches for the synthesis of chemical ractor networks. Industrial & Engineering …”

Simultaneous design of reactor network and its decentralized control system S. 47-59

„… parameters in an integrated step. The advantages of using a simultaneous design approach have been discussed …” „… network superstructure are degrees of freedom of the design problem. This chapter is organized in a …” „… flowsheet structure without the need for integers as in the established synthesis approaches. 1In this case …”

Appendices S. 141-157

„… , the proposed synthesis method can be applied straightforwardly to reactor network superstructures …” „… including CSTR and PFR. Assume that the i-th reactor in a reactor network superstructure, Fig. 3.1, is a PFR …” „… , k → 0, and hence, yk is a sequence approaching y∗. Also, for any q∗, qk can be selected so that all …”

doi.org/10.51202/9783186952035

Partial access

Select for citation download

Bauingenieur

Browse Volumes: Bauingenieur

Bauingenieur Volume 95 (2020) Issue 11 ISSN Online: 0005-6650

Results in this title

H. D. B. Aji, M. B. Basnet, Frank Wuttke A numerical study on the influences of underlying soil and backfill characteristics on the dynamic behaviour of typical integral bridges S. S 2-S 11

„… transfer between the soil and the superstructure. The results also show that the degree of influence of …” „… [19], [22]. The integral concept is realized by building monolithically the superstructure with its …” „… , especially in the case of short span or high stiffness superstructure. From the standpoint of …”

doi.org/10.37544/0005-6650-2020-11

No access

Select for citation download

Systematic and Optimization-Based Synthesis and Design of Chemical Processes

Sebastian Recker

Series: Verfahrenstechnik

Volume 951 2017

Results in this title

Introduction S. 1-10

„… expert-knowledge and heuristics involving problem decomposition. Examples are the hierarchical approach to …” „… approaches to conceptual process design deal only with one of these specific subproblems. A recent database …” „… region concepts, dynamic optimization, and superstructure optimization. Reactor selection heuristics can …”

A unifying framework for conceptual process design S. 11-54

„… reactor feed concentration, which is often not known in the early design phase. Superstructure approaches …” „… Nj,i N0,i Ni,out Ni,j Vi , zi Figure 2.2: State-space representation of the superstructure formulation …” „… RD, xR, bR,n RB, yB, bB,n Ln, xnVn+1, yn+1 F, zF, bF,nF, zF B, xB D, xD Figure 2.5: Superstructure …”

Conclusions and final thoughts S. 95-98

„… methods for the optimization-based process design by means of superstructure optimization. Marquardt et al …” „… optimization procedure integrate existing and new approaches. After all of these advancements, the process …” „… alternatives and as such the approach is not completely systematic. Especially for catalytic processes, the …”

Titelei/Inhaltsverzeichnis S. I-XIV

„… . Various industrial case studies illustrate the application of the novel approaches and highlight their …” „… . . . . . . . . . . . . . . . . . . . . 39 2.4.4 Optimization of a process superstructure with shortcut models . . . 41 V Contents 2.4.5 …” „… superstructure optimization. Marquardt, Kossack and Kraemer (2008) proposed a framework for an optimization-based …”

Bibliography S. 99-114

„… Engineering 81, 218 – 244. Balakrishna, S. and Biegler, L. (1993): A unified approach for the simultaneous …” „… Fair, J. R. (1990): Separation system synthesis: a knowledge-based approach. 1. Liquid mixture …” „… ): Separation system synthesis: a knowledgebased approach. 2. Gas/vapor mixtures, Industrial & Engineering …”

Systematic design of a butadiene telomerization process S. 63-94

„… heuristic approach described in Chapter 3, in the following alternative flowsheet variants for a …” „… than TPP ligand, cost likely to be higher. Alternative immobilization approaches for metal-ligand based …” „… approach to immobilization) to be used to select viable immobilization options based on expert knowledge …”

doi.org/10.51202/9783186951038

Partial access

Select for citation download

Bauingenieur

Browse Volumes: Bauingenieur

Bauingenieur Volume 98 (2023) Issue 05 ISSN Online: 0005-6650

Results in this title

Marjan Pipenbaher Pelješac bridge, Croatia – Part 1: Concept and Design/Pelješac-Brücke, Kroatien – Teil 1: Konzept und Planung S. 147-155

„… superstructure, a two-way crossfall of 2.5 % was adopted on the straight part of the bridge and at the parts in …” „… . Bridge superstructure with traffic lanes Source: Pipenbaher Consulting Engineers archiveBild 6 …” „… superstructure consists of a box girder with 13 spans, which rests on 12 piers and two end supports – abut-ments …”

doi.org/10.37544/0005-6650-2023-05

No access

Select for citation download

Backprojection Autofocus of Large Ships with Arbitrary Motion for Synthetic Aperture Radar

Aron Sommer

Series: Informatik/ Kommunikation

Volume 867 2020

Results in this title

Conclusions S. 112-116

„… range profiles. This approach leads to a huge improvement of the computational costs in comparison to …” „… using a long CPI for all sea states robustly. In this thesis, we proposed an extended autofocus approach …” „… GBP algorithm such that a perfectly focused SAR image can be reconstructed. However, superstructures …”

Autofocus of Large Ships with Arbitrary Motion S. 75-111

„… distances between the aperture positions and all subimages by maximizing subimage sharpness. This approach …” „… ship, which is the main part, is perfectly focused. Only the superstructures, i.e., the driver’s cabin …” „… , which lies on a plane except their superstructure, can be reconstructed perfectly. However, the range …”

doi.org/10.51202/9783186867100

Partial access

Select for citation download

Pinch-based Methods for Absorption and Extraction Process and Solvent Screening

Christian Redepenning

Series: Verfahrenstechnik

Volume 955 2018

Results in this title

Bibliography S. 173-198

„… , S. D., & Fair, J. R. (1990). Separation system synthesis: A knowledge-based approach. 1. liquid …” „… . R. (1992). Separation system synthesis: A knowledge-based approach. 2. gas/vapor mixtures …” „… ). Superstructures for the mixed integer optimization of nonideal and azeotropic distillation processes. Computers …”

Introduction S. 1-20

„… synthesis of a novel process (cf. Klatt & Marquardt (2009)). Figure 1.2 illustrates the design approach for …” „… process analysis, which starts based on the actual chemical plant, and the inverse design approach for …” „… chemicals analysis synthesis Figure 1.2.: Design approach for process analysis and process synthesis …”

Pinch-based solvent screening for absorption and extraction processes S. 90-136

„… superstructure optimization with rigorous models (Douglas, 1988; Kossack et al., 2008; Marquardt et al., 2008 …” „… complex superstructure optimization problem could be simplified by ignoring any structural choices and …” „… separation columns by superstructure optimization, a low and fixed number of separation stages can be assumed …”

Recommendations for further research S. 143-156

„… covered byMESH equations, are more difficult to solve than the pinch-based shortcut approaches, where MESH …” „… regarding the number of stages by MINLP superstructure tech- 1GAMS: General Algebraic Modeling System …” „… presents a unique approach to determine not only an upper value for the required number of stages, but also …”

Pinch-based shortcut method for the design of adiabatic absorption columns S. 21-58

„… absorption process. Superstructure optimization, where a mixed-integer non-linear programming (MINLP) problem …” „… (Dowling & Biegler, 2015; Trespalacios & Grossmann, 2014). However, large superstructures are still …” „… ). This approach can be computationally demanding when many stages are necessary and mixtures with many …”

doi.org/10.51202/9783186955036

Partial access

Select for citation download

Nutzfahrzeuge 2017 – Commercial Vehicles 2017

VDI Wissensforum GmbH (ed.)

Series: VDI-Berichte

Volume 2298 2017

Results in this title

S. Schönherr, S. Kopp, M. Hellmold The NEOPLAN Tourliner – leading the way in CO2 reduction through aerodynamically optimised design – Optimised consumption with consideration to various vehicle requirements S. 115-124

„… approaches and implemented this meticulously in the area at the front of the bus, the front roof dome, the …” „… systems and compliance with directive ECE R66.02 on the strength of superstructures • Modular design …” „… with the applicable directive ECE R66.02 on the strength of superstructures. For this, the framework …”

doi.org/10.51202/9783181022986

Partial access

Select for citation download

Reaction Network Generation and Evaluation for the Design of Biofuel Value Chains

Juan José Wilhelm Victoria Villeda

Series: Verfahrenstechnik

Volume 950 2017

Results in this title

Introduction S. 1-10

„… previous superstructure approaches on 5 1 Introduction biomass to fuel (Kim et al., 2013), microalgae to …” „… bioethanol (Bjerre et al., 1996). Novel approaches also propose to use algae as lignocellulosic feedstock for …” „… process design need to be combined to form an integrated approach to the design of value chains. Isolated …”

doi.org/10.51202/9783186950031

Partial access

Select for citation download

Bauingenieur

Browse Volumes: Bauingenieur

Bauingenieur Volume 98 (2023) Issue 10 ISSN Online: 0005-6650

Results in this title

Manfred Curbach, Iurii Vakaliuk, Marc Koschemann Die CarboLight Bridge im Deutschen Museum – Ein Beispiel für hybride Betonbauweise/The CarboLight bridge in the Deutsches Museum – A hybride concrete structure S. 311-319

„… two gently in-clined V-shaped columns, a three-sectional superstructure and a construction weight of …” „… only 2.1 t. The force-flow-optimized shape and the sandwich structure of the superstructure play a …” „… motivation and the design approaches, up to the assembly of the exhibition bridge in the “Deutsches Museum …”

doi.org/10.37544/0005-6650-2023-10

No access

Select for citation download

Detection of Moving Objects for Aerial Surveillance of Arbitrary Terrain

Marco Munderloh

Series: Informatik/ Kommunikation

Volume 847 2016

Results in this title

Experiments S. 73-92

„… approach, using either a planar (homographybased) single plane background motion model of Chapter 2.5 or a …” „… F-matrix conformance test (Chapter 2.4), competes against the proposed cluster filter approach of Chapter …” „… (homography-based) single-plane global motion compensation, introduced in Chapter 3. As the mesh-based approach …”

doi.org/10.51202/9783186847102

Partial access

Select for citation download

Bauingenieur

Browse Volumes: Bauingenieur

Bauingenieur Volume 96 (2021) Issue 09 ISSN Online: 0005-6650

Results in this title

Lara Bettinelli, Andreas Stollwitzer, Josef Fink Einfluss der Lastverteilung auf die dynamische Tragwerksantwort von Eisenbahnbrücken bei Hochgeschwindigkeitsverkehr/Influence of load distribution on the dynamic response of railway bridges under high-speed traffic S. 285-295

„… the load distribution through the ballasted superstructure for the dynamic calculation of railway …” „… . 1. Possibilities for bridge superstructure models: a) Bernoulli-Euler beam with properties of the …” „… bridge including superstructure, b) multi-body system consisting of track and supporting structure …”

doi.org/10.37544/0005-6650-2021-09

No access

Select for citation download

Optimierung in der Energiewirtschaft

VDI Wissensforum GmbH (ed.)

Series: VDI-Berichte

Volume 2303 2017

Results in this title

S. Kirschbaum, B. Bahl, A. Bardow Multifunktionale Modelle zur Optimierung von industriellen Energiesystemen – Dispatching, Backtesting und Design S. 97-104

„… , S. 485-501. [7] Voll, P., Klaffke, C., Hennen, M., Bardow, A. 2013. ‘Automated superstructure …” „… , P., Bardow, A. 2017. ‘TRusT: A Two-stage Robustness Trade-off approach for the design of …”

doi.org/10.51202/9783181023037

Partial access

Select for citation download

Bauingenieur

Browse Volumes: Bauingenieur

Bauingenieur Volume 99 (2024) Issue 05 ISSN Online: 0005-6650

Results in this title

Christian Moormann, Patrik Buhmann, Barbara Boesen MacAulay Gründungsoptimierung für die neue 4,0 km lange Storstrømsbroen in Dänemark – Herausforderungen bei der Bemessung hoch belasteter Caisson-Gründungen im ´Danish Glacial Till´/Foundation optimisation for the new 4.0 km long Storstrømsbroen in Denmark – Challenges in the design of highly loaded caisson foundations in ‚Danish Glacial Till‘ S. 139-155

„… double-track high-speed railway line with a road on a common superstructure cross-section and will connect the …” „… foundations in the over-consolidated ‚Danish Glacial Till‘. In the process, approaches that go far bey-ond the …” „… gegenüberliegende Approach Viaduct übertragen, was es erforderlich macht, die ge-samte Brücke für die Bemessung …”

doi.org/10.37544/0005-6650-2024-05

No access

Select for citation download

Results (28)