9,931 research outputs found
Effects of transition metal additives to CoMo/?-Al2O3 on the hydrotreating reactions of atmospheric residual oil
No full textThe differentiation of mesenchymal stem cells by mechanical stress or/and co-culture system.
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Ic-B curves of the four kinds of HTS tapes in the SC design.
No full textIc-B curves of the four kinds of HTS tapes in the SC design.</p
K(IC) MODELING FOR A CRITICAL STRAIN CRITERION INVOLVING THE STRESS TRIAXIALITY EFFECT
No full textAn analytical model for predicting fracture toughness K(IC) is proposed based on a stress-modified critical strain criterion, that reflects the effect of stress triaxiality on ductile fracture. For K(IC) modelling, the notch-tip strain and stress states are given by introducing a singular field for the case of power-law-hardening materials. Notch fracture toughness is interpreted in terms of the notch-root radius (rho): K(IC) is predicted to increase with increasing rho, but has a minimum at a small rho. The microstructurally characteristic distance and the reference critical strain can be estimated by fitting the K(IC) vs rho data on the model equation. Finally, previous notch fracture-toughness data are re-analyzed with the proposed model: the current analysis explains well the interaction effect between the notch-tip strain field and the local-fracture-controlling microstructure even in the small rho range.X1123sciescopu
IC-Colorings and IC-Indices of graphs
No full textAbstractGiven a coloring f:V(G)→N of graph G and any subgraph H⊂G we define fs(H)=∑v∈V(H)f(v). In particular, we denote fs(G) by S(f). The coloring f is called an IC-coloring if for any integer k∈[1,S(f)] there is a connected subgraph H⊂G such that fs(H)=k. Also, we define the IC-index of G to beM(G)=max{S(f):f is an IC-coloring of G}.In this paper we examine some well-known classes of graphs and determine their IC-indices. In addition, several conjectures are proposed
A 1024-Channel 268 nW/pixel 36x36 μm<sup>2</sup>/ch Data-Compressive Neural Recording IC for High-Bandwidth Brain-Computer Interfaces
No full textThis paper presents a neural recording IC featuring lossy compression during digitization, thus preventing data deluge and enabling a compact active digital pixel design. The wired-OR-based compression discards unwanted baseline samples while allowing the reconstruction of spike samples. The IC features a 32x32 MEA with 36 μ m pixel pitch and consumes 268nW per pixel from a single 1V supply. It achieves 9.8 μ VRMS input-referred noise and 0.3-5kHz bandwidth, resulting in NEF/PEF of 3.7/14.1. Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Bio-Electronic
A 23-μW Keyword Spotting IC With Ring-Oscillator-Based Time-Domain Feature Extraction
No full textThis article presents the first keyword spotting (KWS) IC that uses a ring-oscillator-based time-domain processing technique for its analog feature extractor (FEx). Its extensive usage of time-encoding schemes allows the analog audio signal to be processed in a fully time-domain manner except for the voltage-to-time conversion stage of the analog front end. Benefiting from fundamental building blocks based on digital logic gates, it offers better technology scalability compared to conventional voltage-domain designs. Fabricated in a 65-nm CMOS process, the prototyped KWS IC occupies 2.03 mm 2 and dissipates 23- power consumption, including analog FEx and digital neural network classifier. The 16-channel time-domain FEx achieves a 54.89-dB dynamic range for 16-ms frame shift size while consuming 9.3 . The measurement result verifies that the proposed IC performs a 12-class KWS task on the Google Speech Command dataset (GSCD) with >86% accuracy and 12.4-ms latency. Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic
Validation of the XDS-CALUX bioassay as a screening and semi-quantitation approach in cow’s milk
No full textW-incorporated CoMo/gamma-Al2O3 hydrodesulfurization catalyst .2. Characterization
No full textSeries of W-incorporated CoMo/gamma-Al2O3 catalysts were characterized with TPR, DRS, ESR, and WS. Two series of catalysts with varying content of tungsten were prepared for characterization by changing the impregnation order of cobalt and tungsten to a base Mo/gamma-Al2O3 catalyst. The activity promotion by relatively low content of tungsten arose from the roles of tungsten in changing the Mo-oxide coordination from tetrahedral to octahedral, facilitating the reduction of Mo-oxide species, and increasing the dispersion of MoS2. By incorporation of tungsten at a content as much as 0.025 in W/(W + Mo) atomic ratio, the MoS2 dispersion of CoMo/gamma-Al2O3 catalyst was considered to be maximized without noticible detriment to the active Co-Mo-O phase, resulting in the maximum activity promotion. The formation of the Co-Mo-O phases was more favored in the catalysts prepared by impregnating W onto CoMo/gamma-Al2O3 than in those by impregnating W onto Mo/gamma-Al2O3 before impregnation of Co. The effect of tungsten on the dispersion of active phase was not discriminated between the two series of catalysts. The activity decrease observed in the catalysts containing higher content of tungsten originated from the increase in the W-oxide coverage on the surface of Mo-oxides or Co-Mo-O phases, resulting in not only impeding the reduction or sulfidation of the oxidic precursor but facilitating the formation of less active Co-W-O at the sacrifice of more active Co-Mo-O phase
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