LaLaRAND: Flexible Layer-by-Layer CPU/GPU Scheduling for Real-Time DNN Tasks

In electro discharge machining (EDM) for 3D micro structures, the electrode wear is serious and it needs to be compensated in process. To obtain a better balance of the machining accuracy and efficiency, a servo scanning EDM method is proposed for 3D micro structures, in which the electrode wear is compensated on real-time by controlling the discharge gap constant. It is supposed reasonably that the machining depth of each layer in servo scanning EDM is consistent if discharge gap is kept preferably. The servo scanning EDM strategies include the model design by Pro/Engineer (Pro/E), the plan and simulation of scanning path, and the machining process. The 3D micro structures are machined by scanning layer-by-layer under servo control of the electrode with monitoring discharge gap signal. The CAM, gap servo control, and real-time electrode wear compensating are integrated into the machining system. The evaluation experiments of servo scanning EDM and the typical machining experiments of 3D micro structures have been carried out. The machining results show that the electro discharge in the servo scanning EDM is more stable. Servo scanning micro EDM is propitious to improve machining accuracy and efficiency in 3D micro structures.

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Real-Time Viewing Of Dynamic Processes On Cdte Surfaces At Elevated Temperature

MRS Proceedings ◽

10.1557/proc-295-133 ◽

1992 ◽

Vol 295 ◽

Author(s):

David J. Smith ◽

R. Vogl ◽

Ping Lu

Keyword(s):

Real Time ◽

Video Recording ◽

Online Video ◽

Layer By Layer ◽

Resolution Electron ◽

Different Types ◽

Imaging Mode ◽

High Resolution Electron Microscope ◽

Ledge Mechanism ◽

Reversible Phase

AbstractOnline video recording with a high-resolution electron microscope has been used to study real-time atomic events occurring at cadmium telluride surfaces over a range of temperatures from 27°C to 500°C. Using the profile imaging mode of observation, different types of surface activity have been documented on (001), (111) and (110) surfaces. For example, the (001) surfaces displayed reversible phase transformations between 2× 1 and 3×1 reconstructions at a transition temperature of about 200°C. The (111) surfaces exhibited sublimation by a ledge mechanism that depended upon the terminating surface: layer-by-layer removal invariably occurred for (110) surface terminations whereas bilayer removal was usually seen for terminations by (100) surfaces. Finally, the (110) surface rearranged by a hopping mechanism, but no substantial loss of material was observed.

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On the in situ elimination of pores during laser powder bed fusion of a titanium alloy

10.21203/rs.3.rs-386269/v1 ◽

2021 ◽

Author(s):

ling zhang ◽

Wenhe Liao ◽

Tingting Liu ◽

Huiliang Wei ◽

Changchun Zhang

Keyword(s):

Titanium Alloy ◽

Real Time ◽

Laser Power ◽

Layer By Layer ◽

Powder Bed Fusion ◽

Laser Powder Bed Fusion ◽

Powder Bed ◽

Printing Quality ◽

High Laser

Abstract The printing quality of the laser powder bed fusion (LPBF) components largely depends on the presence of various defects such as massive porosity. Thus, the efficient elimination of pores is an important factor to the production of a sound LPBF product. In this work, the efficacy of two in situ laser remelting approaches on the elimination of pores during LPBF of a titanium alloy Ti-6.5Al-3.5Mo-l.5Zr-0.3Si (TC11) were assessed using both experimental and computational methods. These two remelting methods are the surface remelting, and the layer-by-layer printing and remelting. A multi-track and multi-layer phenomenological model was established to compute the evolution of pores with the temperature and velocity fields. The results showed that surface remelting with a high laser power such as 180 W laser can effectively eliminate pores within three deposited layers. However, such a remelting cannot reach defects in deeper regions. Alternatively, the layer-by-layer remelting with a laser power of 180 W can effectively eliminate the pores formed in the previous layer in real time. The results obtained from this work can provide useful guidance for the in situ control of printing defects supported by the real time monitoring, feedback and operation systems of the intelligent LPBF equipment.

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Balancing Energy Efficiency and Real-Time Performance in GPU Scheduling

10.1109/rtss52674.2021.00021 ◽

2021 ◽

Author(s):

Yidi Wang ◽

Mohsen Karimi ◽

Yecheng Xiang ◽

Hyoseung Kim

Keyword(s):

Energy Efficiency ◽

Real Time ◽

Time Performance ◽

Balancing Energy ◽

Gpu Scheduling

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