Study on Preparation and Dielectric Properties of Nano Ni/SiC Composite Particles

2012 ◽  
Vol 151 ◽  
pp. 218-221
Author(s):  
Hui Xu ◽  
Guo Xing Wang ◽  
Xi Chun Yu ◽  
Mao Sheng Cao
Keyword(s):  
Dielectric Constant ◽  
Magnetic Permeability ◽  
Composite Particles ◽  
High Quality ◽  
Chemical Plating ◽  
Sic Particles ◽  
Plating Method ◽  
Core Shell Structure ◽  
And Performance ◽  
Quality Surface

In order to alleviate the glomeration of nanometer (SiC)p and improve its compatibility and performance, the chemical plating method was applied to get high-quality surface modification, and achieve the Ni/SiC composite particles. The dielectric and absorbing properties of the Ni/SiC particles were studied. The results showed that the modified SiC particles is nearly spherical, homogeneous morphology, and has a distinct core and shell parts. The different contrast of the shell indicated that more Ni is deposited on the (SiC)p surface, and the silicon carbide-nickel core-shell structure is formed. The dielectric constant, dielectric loss and magnetic permeability of the Ni/SiC composite particles have significant improvements compared with those of the original one. The dielectric constant rises about 24%, and R reaches -25.15dB when magnetic permeability up to 16.11GHz.

Preparation and Characterization of Copper-Coated Alumina Powders

2007 ◽  
Vol 336-338 ◽  
pp. 1403-1405
Author(s):  
G. Zhao ◽  
Z.M. Shi
Keyword(s):  
Phase Composition ◽  
Surface Morphology ◽  
Room Temperature ◽  
Processing Parameters ◽  
Experimental Results ◽  
High Quality ◽  
Chemical Plating ◽  
Plating Method ◽  
Plating Solution

Copper-coated alumina powders were prepared by a chemical plating method. The processing parameters such as compositions of plating solution, dispersants and passivants were optimized to obtain high-quality Cu-coated alumina powders. The phase composition, surface morphology and granularity of the coated powders were analyzed. Experimental results showed that the alumina powders coated with copper can be successfully prepared by the chemical plating method at room temperature, and the additions of dispersant and passivant can sufficiently improve the dispersity of powders and can depress the oxidation of copper layers precipitated from the plating solution. The granularity of alumina powders is increased by about 60 nm after being coated with the copper layer.

scholarly journals Emotion Recognition on Edge Devices: Training and Deployment

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4496
Author(s):  
Vlad Pandelea ◽  
Edoardo Ragusa ◽  
Tommaso Apicella ◽  
Paolo Gastaldo ◽  
Erik Cambria
Keyword(s):  
Emotion Recognition ◽  
Language Processing ◽  
Computational Cost ◽  
Sequential Learning ◽  
High Quality ◽  
Fast Training ◽  
Online Sequential Learning ◽  
And Performance ◽  
Resource Constrained Devices ◽  
Constrained Devices

Emotion recognition, among other natural language processing tasks, has greatly benefited from the use of large transformer models. Deploying these models on resource-constrained devices, however, is a major challenge due to their computational cost. In this paper, we show that the combination of large transformers, as high-quality feature extractors, and simple hardware-friendly classifiers based on linear separators can achieve competitive performance while allowing real-time inference and fast training. Various solutions including batch and Online Sequential Learning are analyzed. Additionally, our experiments show that latency and performance can be further improved via dimensionality reduction and pre-training, respectively. The resulting system is implemented on two types of edge device, namely an edge accelerator and two smartphones.

scholarly journals Large-Scale and Deep-Seated Gravitational Slope Deformations on Mars: A Review

Geosciences ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 174
Author(s):  
Marco Emanuele Discenza ◽  
Carlo Esposito ◽  
Goro Komatsu ◽  
Enrico Miccadei
Keyword(s):  
Large Scale ◽  
High Quality ◽  
Surface Data ◽  
Geomorphological Processes ◽  
Gravitational Processes ◽  
Quality Surface ◽  
High Quality Surface ◽  
Mars Missions

The availability of high-quality surface data acquired by recent Mars missions and the development of increasingly accurate methods for analysis have made it possible to identify, describe, and analyze many geological and geomorphological processes previously unknown or unstudied on Mars. Among these, the slow and large-scale slope deformational phenomena, generally known as Deep-Seated Gravitational Slope Deformations (DSGSDs), are of particular interest. Since the early 2000s, several studies were conducted in order to identify and analyze Martian large-scale gravitational processes. Similar to what happens on Earth, these phenomena apparently occur in diverse morpho-structural conditions on Mars. Nevertheless, the difficulty of directly studying geological, structural, and geomorphological characteristics of the planet makes the analysis of these phenomena particularly complex, leaving numerous questions to be answered. This paper reports a synthesis of all the known studies conducted on large-scale deformational processes on Mars to date, in order to provide a complete and exhaustive picture of the phenomena. After the synthesis of the literature studies, the specific characteristics of the phenomena are analyzed, and the remaining main open issued are described.

Construction of MOFs-Shell Porous Materials and Performance Study in Selective Adsorption and Separation of Benzene Pollutants

2021 ◽  
Author(s):  
Yu Qiao ◽  
Na Lv ◽  
Dong Li ◽  
Hongji Li ◽  
Xiangxin Xue ◽  
...  
Keyword(s):  
Porous Materials ◽  
Shell Structure ◽  
Selective Adsorption ◽  
Core Shell ◽  
Architecture Design ◽  
Performance Study ◽  
The Core ◽  
Core Shell Structure ◽  
And Performance ◽  
Sacrificial Agent

Metastable Cu2O is an attractive material for the architecture design of integrated nanomaterials. In this context, Cu2O was used as the sacrificial agent to form the core-shell structure of Cu2O@HKUST-1...

Erratum: Structure and performance of dielectric films based on self-assembled nanocrystals with a high dielectric constant

2013 ◽  
Vol 24 (49) ◽  
pp. 499601 ◽  
Author(s):  
Limin Huang ◽  
Shuangyi Liu ◽  
Barry J Van Tassell ◽  
Xiaohua Liu ◽  
Andrew Byro ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
High Dielectric Constant ◽  
Dielectric Films ◽  
Self Assembled ◽  
And Performance ◽  
High Dielectric

Smart‐Cut® : The Basic Fabrication Process for Unibond® Soi Wafers

1996 ◽  
Vol 446 ◽  
Author(s):  
A.J. Auberton‐Hervé ◽  
T. Barge ◽  
F. Metral ◽  
M. Bruel ◽  
B. Aspar ◽  
...  
Keyword(s):  
Wafer Bonding ◽  
Low Cost ◽  
Bulk Silicon ◽  
High Quality ◽  
Thin Film Thickness ◽  
Hydrogen Implantation ◽  
Electric Behavior ◽  
Bonding Technology ◽  
Good Uniformity ◽  
Quality Surface

AbstractThe advantage of SOI wafers for device manufacture has been widely studied. To be a real challenger to bulk silicon, SOI producers have to offer SOI wafers in large volume and at low cost. The new Smart‐Cut® SOI process used for the manufacture of the Unibond® SOI wafers answers most of the SOI wafer manufacturability issues. The use of Hydrogen implantation and wafer bonding technology is the best combination to get good uniformity and high quality for both the SOI and buried oxide layer. In this paper, the Smart‐Cut® process is described in detail and material characteristics of Unibond® wafers such as crystalline quality, surface roughness, thin film thickness homogeneity, and electric behavior.

Characterization of Fe3O4@CS@NMDP magnetic nanoparticles with core–shell structure prepared by chemical cross-linking method

2017 ◽  
Vol 10 (05) ◽  
pp. 1750056 ◽  
Author(s):  
Huiping Shao ◽  
Jiangcong Qi ◽  
Tao Lin ◽  
Yuling Zhou ◽  
Fucheng Yu
Keyword(s):  
Magnetic Nanoparticles ◽  
Shell Structure ◽  
High Performance ◽  
Cross Linking ◽  
Composite Particles ◽  
Core Shell ◽  
The Core ◽  
Targeting Delivery ◽  
Core Shell Structure ◽  
Chemical Cross Linking

The core–shell structure composite magnetic nanoparticles (NPs), Fe3O4@chitosan@nimodipine (Fe3O4@CS@NMDP), were successfully synthesized by a chemical cross-linking method in this paper. NMDP is widely used for cardiovascular and cerebrovascular disease prevention and treatment, while CS is of biocompatibility. The composite particles were characterized by an X-ray diffractometer (XRD), a Fourier transform infrared spectroscopy (FT-IR), a transmission electron microscopy (TEM), a vibrating sample magnetometers (VSM) and a high performance liquid chromatography (HPLC). The results show that the size of the core–shell structure composite particles is ranging from 12[Formula: see text]nm to 20[Formula: see text]nm and the coating thickness of NMDP is about 2[Formula: see text]nm. The saturation magnetization of core–shell composite NPs is 46.7[Formula: see text]emu/g, which indicates a good potential application for treating cancer by magnetic target delivery. The release percentage of the NMDP can reach 57.6% in a short time of 20[Formula: see text]min in the PBS, and to 100% in a time of 60[Formula: see text]min, which indicates the availability of Fe3O4@CS@NMDP composite NPs for targeting delivery treatment.

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