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Open Data Protocol
Published in Giovanni Bartolomeo, Tatiana Kováčiková, Identification and Management of Distributed Data: NGN, Content-Centric Networks and the Web, 2016
Giovanni Bartolomeo, Tatiana Kováčiková
The PUT method is used for a full replacement; that is, it overwrites a resource with a complete new body. To support differential updates, the HTTP PATCH method, proposed in RFC 5789 (Dusseault and Snell 2010), and the new HTTP MERGE (proposed in the OData specifications) method may be used instead. In these methods, only properties defined in the request body are updated, while other properties are left unchanged. With PATCH, the value of each property is updated to the one specified in the request body exactly. This implies that complex typed properties must be accurately specified component by component. With MERGE, however, updates happen on a component basis, and complex typed properties need to be specified only partially.
Models and Tools for Complex Embedded Software and Systems
Published in Luciano Lavagno, Igor L. Markov, Grant Martin, Louis K. Scheffer, Electronic Design Automation for IC System Design, Verification, and Testing, 2017
For managing model versions, EMF Compare provides generic support to compare and merge models constructed according to any type of EMF-supported (MOF) metamodel. EMF Diff/Merge is another diff/merge tool for models. The plug-in can be used as a utility for tools that need to merge models based on consistency rules. Typical usage includes model refactoring, iterative model transformations, bridges between models or modeling tools, collaborative modeling environments, or versioning systems.
Hybrid 3D Modelling of Parts
Published in Ionuţ Gabriel Ghionea, Cristian Ioan Tarbă, Saša Ćuković, CATIA v5, 2023
Ionuţ Gabriel Ghionea, Cristian Ioan Tarbă, Saša Ćuković
In order to recreate the solid, the user must merge all these surfaces into one unique patch using the Join tool. In the dialog box in Figure 3.442, the surfaces are selected using a selection window with the mouse. This method is recommended when the number of surfaces is relatively large. If the first entity selected in the Join Definition box is a surface, then only this entity type is still allowed to be selected (not for, e.g., combining with lines).
Design of a wideband patch antenna and performance enhancement using an AMC reflector surface for on-body communication at 2.45 GHz
Published in International Journal of Electronics, 2023
Anupma Gupta, Ankush Kansal, Paras Chawla
It is well known that multiple harmonic radiation generation is the inherent feature of patch antenna. To overcome this effect, width of patch is modified to merge the two resonance modes in antenna4 (Chaturvedi & Raghavan, 2018; Xu et al., 2018). This modification plays prominent role in antenna performance by tuning resonance at desired ISM band and achieving wider bandwidth. Reflection coefficient value of antenna3 at 2.45 GHz is below 0 dB. Thus, to increase the resistance of antenna, width is modified in antenna4. Decreasing width of radiator has enhanced real impedance and tuned the antenna to resonate at desired band. In addition to this higher order resonance modes of the radiating patch merged, which widen impedance bandwidth of antenna. Reflection coefficient plot for varying ‘W’ is shown in Figure 6. Desired resonance is obtained at 7 mm width with wide impedance bandwidth of 1.07 GHz (1.76–2.83 GHz).
A Design of Bandwidth-Enhanced Conformal Antenna for Aircraft Applications
Published in IETE Journal of Research, 2023
The third observation in Figure 6 is obtained by sweeping the width of the bottom patch (WL). Usually the change in width alters the input impedance and thus the impedance bandwidth. The change in the first resonant point (F1) is insignificant. But, the change in WL moves the second resonant point (F2) greatly towards F1. At one point, the F1 and F2 merge together and provide two times the bandwidth of a single patch. It is because the energy transferred to the top patch decreases as the bottom patch width decreases. Also, this parameter moves the third resonant point (F3) slightly towards the lower frequency. But, the S11 value of F3 increases above – 10 dB after certain (WL), as given in Figure 5. This effect explains the fact that the F3 comes into existence only when there is an extended edge between the top and bottom patches. Reducing the width of the bottom patch has a similar effect by increasing the width of upper patch but in opposite sides of the frequency spectrum.
Design of Asymmetrical Antenna Using Slotted Mirror Image Ground Aperture Coupling for Multiband Application
Published in IETE Journal of Research, 2022
Sanjay Vivekanand Khobragade, Sanjay Laxmikant Nalbalwar, Anil Bapusa Nandgaonkar, Abhay Eknath Wagh
The design is simulated for three stages. The first stage is the design of a fractal tree antenna with a simple ground plane of size 70 × 106 mm, FR4 substrate (dielectric constant of 4.4 and loss tangent of 0.019) with a substrate height of 1.6 mm. In the second stage, ground is designed using two circular patches merge with a rectangular patch. An additional patch is inserted for the smooth feeding between the main patch and ground plane. The size of the additional patch in the ground plane is 18 × 9 mm. In the third stage, this design is further modified with one more additional substrate as substrate 2. The dimension and specification of both the substrates are the same as mentioned in Table 1. Now a ground plane is used as feed for aperture-coupling antenna and mirror image ground with an additional patch inserted in between two substrates. The size of the patch is 14 × 7 mm.