Hitachi (Canada)

Worldwide, more and more sectors are decarbonizing via electrification paired with renewable generation and energy efficiency. Within the transportation sector, the replacement of fossil-fuel vehicles, especially buses, with electric ones is posing new challenges not only related to the long-term infrastructure planning but also to the short-term management and control. This paper presents a simulation platform, based on the Monte-Carlo approach aimed at simulating the electric vehicles depot and analyzing the impact of short-term uncertainties on the daily energy management of the fleet. The main principles and functionalities of the platform are tested and shown considering a public transportation bus fleet as a case study.

This paper discusses how Silicon Valley Power (SVP) has addressed numerous constraints during rebuilding SCADA for its decades-old substations. SVP has leveraged diverse SCADA hardware offerings to achieve its goals of retrofitting SCADA for existing substations. SVP used distributed architecture of Remote Terminal Units (RTUs) to address aging wires and limited conduit space by introducing a communication-based distributed system and added Web-based Human Machine Interface (HMI) to replace annunciators and provide complete stations visibility from anywhere in SVP system. SVP innovations include the use of existing wires as communication media, and placement of measurement devices close to data sources. SVP upgrades were completed transparently to operation and without lifting a single control wire to eliminate re-commissioning.

Journal Article Collection Efficiency of the Twin EDS Detectors for Quantitative X-ray Analysis on A New Probe-Corrected TEM/STEM Get access Jane Y Howe, Jane Y Howe Hitachi High-Technologies America Inc., Clarksburg, USA Search for other works by this author on: Oxford Academic Google Scholar Tarunika Ramprasad, Tarunika Ramprasad Department of Materials Science and Engineering, University of Arizona, USA Search for other works by this author on: Oxford Academic Google Scholar Akinari Hanawa, Akinari Hanawa Hitachi High Technologies Co., Hitachinaka, Japan Search for other works by this author on: Oxford Academic Google Scholar Hiromi Inada, Hiromi Inada Hitachi High Technologies Co., Hitachinaka, Japan Search for other works by this author on: Oxford Academic Google Scholar Jose Jimenez, Jose Jimenez Hitachi High-Technologies America Inc., Clarksburg, USA Search for other works by this author on: Oxford Academic Google Scholar David Hoyle, David Hoyle Hitachi High Technologies Canada Inc., Toronto, Canada Search for other works by this author on: Oxford Academic Google Scholar Edgar Voelkl, Edgar Voelkl Hitachi High-Technologies America Inc., Clarksburg, USA Search for other works by this author on: Oxford Academic Google Scholar Thomas J Zega Thomas J Zega Department of Materials Science and Engineering, University of Arizona, USALunar and Planetary Laboratory, University of Arizona, USA Search for other works by this author on: Oxford Academic Google Scholar Microscopy and Microanalysis, Volume 23, Issue S1, 1 July 2017, Pages 520–521, https://doi.org/10.1017/S1431927617003282 Published: 04 August 2017

Graphene oxide (GO) is a layered material comprised of hierarchical features which possess vastly differing characteristic dimensions. GO nanosheets represent the critical hierarchical structure which bridges the length-scale of monolayer and bulk material architectures. In this study, the strength and fracture behavior of GO nanosheets were examined. Under uniaxial loading, the tensile strength of the nanosheets was measured to be as high as 12 ± 4 GPa, which approaches the intrinsic strength of monolayer GO and is orders of magnitude higher than that of bulk GO materials. During mechanical failure, brittle fracture was observed in a highly localized region through the cross-section of the nanosheets without interlayer pull-out. This transition in the failure behavior from interplanar fracture, common for bulk GO, to intraplanar fracture, which dominates failure in monolayer GO, is responsible for the high strength measured in the nanosheets. Molecular dynamics simulations indicate that the elastic release from the propagation of intraplanar cracks initiates global fracture due to interlayer load transmission through hydrogen bond networks within the gallery space of the GO nanosheets. Furthermore, the GO nanosheet strength and stiffness were found to be strongly correlated to the effective volume and thickness of the samples, respectively. These findings help to bridge the understanding of the mechanical behavior of hierarchical GO materials and will ultimately guide the application of this intermediate scale material.

Journal Article Detecting Localized Variation of Chemistry via Atomic-Resolution Secondary Electron Imaging Get access Jane Howe, Jane Howe Hitachi High-Technologies Canada Inc, Toronto, Canada Search for other works by this author on: Oxford Academic Google Scholar Yoichiro Hashimoto, Yoichiro Hashimoto Science System Design Division, Hitachi High-Technologies Co., Hitachinaka, Ibaraki, Japan Search for other works by this author on: Oxford Academic Google Scholar Xue Wang, Xue Wang The School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, USA Search for other works by this author on: Oxford Academic Google Scholar Madeline Vara, Madeline Vara The School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, USA Search for other works by this author on: Oxford Academic Google Scholar David Hoyle, David Hoyle Hitachi High-Technologies Canada Inc, Toronto, Canada Search for other works by this author on: Oxford Academic Google Scholar Tom Schamp, Tom Schamp Hitachi High-Technologies America Inc, Gaithersburg, USA Search for other works by this author on: Oxford Academic Google Scholar Younan Xia, Younan Xia The School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, USA Search for other works by this author on: Oxford Academic Google Scholar David Joy David Joy Department of Materials Science and Engineering, University of Tennessee, Knoxville, USACenter for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, USA Search for other works by this author on: Oxford Academic Google Scholar Microscopy and Microanalysis, Volume 21, Issue S3, 1 August 2015, Pages 1265–1266, https://doi.org/10.1017/S1431927615007114 Published: 23 September 2015

Journal Article X-ray Quantitative Microanalysis Maps across Interfaces of a Cu-Al Roll Bonded Laminate with an Annular Silicon Drift Detector Get access Hendrix Demers, Hendrix Demers Department of Mining and Materials Engineering, McGill University, Montreal, Quebec, Canada Search for other works by this author on: Oxford Academic Google Scholar Nicolas Brodusch, Nicolas Brodusch Department of Mining and Materials Engineering, McGill University, Montreal, Quebec, Canada Search for other works by this author on: Oxford Academic Google Scholar Richard Wuhrer, Richard Wuhrer Advanced Materials Characterisation Facility, University of Western, Sydney, NSW, Australia Search for other works by this author on: Oxford Academic Google Scholar Ken Moran, Ken Moran Moran Scientific Pty Ltd, Bungonia, NSW, Australia Search for other works by this author on: Oxford Academic Google Scholar Patrick Woo, Patrick Woo Hitachi High-Technologies Canada Inc., Toronto, Canada Search for other works by this author on: Oxford Academic Google Scholar Raynald Gauvin Raynald Gauvin Department of Mining and Materials Engineering, McGill University, Montreal, Quebec, Canada Search for other works by this author on: Oxford Academic Google Scholar Microscopy and Microanalysis, Volume 20, Issue S3, 1 August 2014, Pages 676–677, https://doi.org/10.1017/S1431927614005108 Published: 27 August 2014

The effect of post weld heat treating and stress relieving on the fatigue strength of AISI 8630 cast steel, weld repaired with different filler materials, is the primary objective of the study. To determine the material properties, experiments included monotonic tensile tests, load-controlled fatigue tests as well as hardness tests. Moreover, specimens were micro-etched to examine the morphology of the fracture surface. The results of the fatigue tests are presented in the form of S-N charts. The test findings are then employed in a generalized numerical solution to predict the fatigue behavior of similar components. Finite element models are used to calculate stresses in tested samples, stress concentrations, and in fatigue life comparisons. Stress-life predictions were performed using the modified Goodman criterion to account for the mean stress effects caused by the stress ratio R = 0.1 loading. Predictions based off of finite element analysis and analytical solution for fatigue life provided reasonable estimates which are confirmed by the experimental results.

Nanomanipulation inside a scanning electron microscope (SEM) has been employed to maneuver and characterize nanomaterials. Despite recent efforts toward automated nanomanipulation, it is still largely conducted manually. In this paper, we demonstrate automated nanomanipulation inside an SEM for a well-structured nanomanipulation task via visual servo control and a vision-based contact detection method using SEM as a vision sensor. Four-point probe measurement of individual nanowires is achieved automatically by controlling four nanomanipulators with SEM visual feedback. A feed-forward controller is incorporated into the control system to improve response time. This technique represents an advance in nanomanipulation inside SEM and can be extended to other nanomanipulation tasks.