Enhanced Feasible-Path Unicast Reverse Path Forwarding

2020 ◽  
Author(s):  
K. Sriram ◽  
D. Montgomery ◽  
J. Haas
Keyword(s):  
Feasible Path ◽  
Reverse Path

scholarly journals Filtering Source-Spoofed IP Traffic Using Feasible Path Reverse Path Forwarding with SDN

2016 ◽  
Vol 5 (6) ◽  
pp. 441-454
Author(s):  
Kevin Benton ◽  
◽  
L. Jean Camp ◽  
Tim Kelley ◽  
Martin Swany
Keyword(s):  
Feasible Path ◽  
Reverse Path

Filtering IP source spoofing using feasible path reverse path forwarding with SDN

2015 ◽  
Author(s):  
Kevin Benton ◽  
L. Jean Camp ◽  
Tim Kelley ◽  
Martin Swany
Keyword(s):  
Feasible Path ◽  
Reverse Path

Research on Hyperpaths in the Urban Rail Transit Network

2014 ◽  
Vol 488-489 ◽  
pp. 1439-1443
Author(s):  
Jin Hai Li ◽  
Jian Feng Liu
Keyword(s):  
Large Scale ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Transit Network ◽  
Travel Costs ◽  
Urban Rail ◽  
Distinctive Structure ◽  
Feasible Path ◽  
Definition Of ◽  
Urban Rail Transit Network

Hyperpaths enumeration is one of the basic procedures in many traffic planning issues. As a result of its distinctive structure, hyperpaths in Urban Rail Transit Network (URTN) are different from those in road network. Typically, one may never visit a station more than once and would never transfer from one line to another that has been visited in a loopless URTN, meaning that stations a hyperpath traversed cannot be repeated, neither do lines in loopless networks. This paper studies the relationships between feasible path and the shortest path in terms of travel costs. In this paper, a new definition of hyperpath in URTN is proposed and a new algorithm based on the breadth first searching (BFS) method is presented to enumerate the hyperpaths. The algorithm can safely avoid hyperpath omission and can even be applied in networks containing loops as well. The influence of parameters on hyperpaths is studied by experimentally finding hyperpaths in the subway network in Beijing. A group of suggested parameter pairs are then given. Finally, a numerical experiment is used to illustrate the validity of the proposed algorithm. The results imply the significance of the convergence of the BFS algorithm which can be used to search hyperpaths in large scale URTN even with loop.

Direct and Indirect Vibro-Acoustic Measurements for Road Noise NVH Predictions

2005 ◽  
Author(s):  
Alessandro Zanarini ◽  
Filip De Coninck ◽  
Krzysztof Mendrok ◽  
Paul Sas
Keyword(s):  
Complex Structure ◽  
Indirect Measurement ◽  
Acoustic Measurements ◽  
Road Noise ◽  
Indirect Measurements ◽  
Direct Measurements ◽  
Path Direction ◽  
Vehicle Technologies ◽  
Structure Measurement ◽  
Reverse Path

This paper describes vibro-acoustic direct and indirect measurements for road noise NVH predictions from a complete car. Attention is devoted to the dynamic response of the structure and interior pressure field toward tire patch displacement inputs. The direct measurements exploited the Team Corporation CUBE™ high frequency 6 degree-of-freedom (DOF) shaker recently installed at the KULeuven Vehicle Technologies Laboratory; the input was provided directly at the tire contact patch, while the responses were measured as accelerations and pressures on the structure. In the indirect measurements a low-mid frequency volume velocity source (LMFVVS) was used to acoustically excite the structure in the reverse path direction from the inside of the interior car cavity, while accelerations on the car and forces/torques where acquired by a 6-DOF dynamometer at the tire patch. From both types of excitations Frequency Response Functions (FRF) were calculated in the frequency range [0–500 Hz]. The non-linearity of the full car system was investigated with different direct and indirect measurement tests, in order to assess the feasibility of the reciprocity principle in such a complex structure. Measurement set-ups, results and comparisons are described and discussed in detail.

A model based approach to fault detection for the reverse path of cable television networks

1998 ◽  
Vol 44 (4) ◽  
pp. 478-487 ◽  
Author(s):  
N.P. Kourounakis ◽  
S.W. Neville ◽  
N.J. Dimopoulos
Keyword(s):  
Fault Detection ◽  
Cable Television ◽  
Model Based ◽  
Reverse Path

Nonlinear identification of base-isolated buildings by reverse path method

2009 ◽  
Author(s):  
Liyu Xie ◽  
Akira Mita
Keyword(s):  
Nonlinear Identification ◽  
Reverse Path Method ◽  
Reverse Path

A Subspace-Inclusive Sampling Method for the Computational Design of Compositionally Graded Alloys

2021 ◽  
Author(s):  
Marshall Allen ◽  
Tanner Kirk ◽  
Richard Malak ◽  
Raymundo Arroyave
Keyword(s):  
State Space ◽  
Sampling Method ◽  
Computational Design ◽  
Functionally Graded ◽  
The State ◽  
Alloying Element ◽  
Graded Materials ◽  
Composition Space ◽  
Feasible Path ◽  
Single Material

Abstract Compositionally graded alloys, a special class of functionally graded materials (FGMs), utilize localized variations in composition within a single metal part to achieve higher performance than traditional single-material parts. In previous work [1], the authors presented a computational design methodology that avoids common issues which limit a gradient alloy’s usefulness or feasibility, such as deleterious phases or properties, and also optimizes gradients for performance objectives. However, the previous methodology only samples the interior of a composition space, meaning designed gradients must include all elements in the space at every step in the gradient. Because the addition of even a small amount of an alloying element can introduce a new deleterious phase, this characteristic often neglects potentially simpler solutions to otherwise unsolvable problems and, consequently, discourages the addition of new elements to the state space. The present work improves upon the previous methodology by introducing a sampling method that includes subspaces with fewer elements in the design search. The new sampling method samples within an artificial expanded form of the state space and projects samples outside the true region to the nearest true subspace. This method is evaluated first by observing the distribution of samples in each subspace of a 2-D, 3-D, and 4-D state space. Next, a parametric study in a synthetic 2-D problem compares the performance of the new sampling scheme to the previous methodology. Lastly, the updated methodology is applied to design a gradient from stainless steel to equiatomic NiTi that has practical uses such as embedded shape memory actuation and for which the previous methodology fails to find a feasible path.

Backcasting as a strategic management tool for meeting VUCA challenges

2019 ◽  
Vol 12 (2) ◽  
pp. 298-312 ◽  
Author(s):  
Kent Thorén ◽  
Martin Vendel
Keyword(s):  
Strategic Management ◽  
Management Tool ◽  
Strategy Development ◽  
Strategy Formation ◽  
Content Type ◽  
Major Transitions ◽  
Strategy Process ◽  
Feasible Path ◽  
Core Idea ◽  
Interactive Workshop

Purpose Backcasting helps managers involve and align the organization throughout a strategy process. Its core idea is creating a logical path from a depicted future back to the present, to share, analyze and manage strategic challenges. Still its use in strategic management is under-researched. The purpose of this paper is to verify the relevance and validity of backcasting as a strategic management tool. It also analyzes and structures knowledge about backcasting and its practical application in strategic management. Design/methodology/approach This paper employs desktop research method to outline the benefits and limitations of backcasting for strategy formation under VUCA conditions. Findings Backcasting can help organizations overcome cognitive barriers and broaden the scope of options when analyzing future positions. The research provides insights regarding the potential and limitations of backcasting when addressing uncertainty and its drivers. For instance, it helps managers to assess and align visions; increase the understanding and clarity regarding complex dependencies; as well as improve strategic agility. Practical implications Backcasting is exceptionally useful for investigating possible futures and alternative paths to it. Backcasting is an interactive workshop-based method that challenges prevailing mindsets by assuming we are in the future, looking back towards today to find a feasible path when major transitions are necessary. With it, managers can deal with even the most uncertain decisions in a structured manner. Originality/value Backcasting for many reasons has a great potential as a tool for strategy development. It has been successfully applied in other fields but only to a limited extent in business. This paper formally examines its applicability in this context and demonstrates its relevance for dealing with VUCA challenges.

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