This document is intended to provide operational guidelines for
datacenter operators planning to deploy IPv6 in their infrastructures.
It aims to offer a reference framework for evaluating different
products and architectures, and therefore it is also addressed to
manufacturers and solution providers, so they can use it to gauge
their solutions. We believe this will translate in a smoother and
faster IPv6 transition for datacenters of these infrastuctures. The
document focuses on the DC infrastructure itself, its operation, and
the aspects related to DC interconnection through IPv6. It does not
consider the particular mechanisms for making Internet services
provided by applications hosted in the DC available through IPv6
beyond the specific aspects related to how their deployment on the
Data Center (DC) infrastructure. Apart from facilitating the
transition to IPv6, the mechanisms outlined here are intended to make
this transition as transparent as possible (if not completely
transparent) to applications and services running on the DC
infrastructure, as well as to take advantage of IPv6 features to
simplify DC operations, internally and across the Internet.
Based on the analysis of interaction law between the pantograph slipper and contract system wires,a new dual-lubricating copper-based powder metallurgic slipper is developed,combining with the theoretic argumentation and considering economic cost.After the performance test and industrial test shows that the expected goal of the slipper design has been reached and the research enriches the theory of electrical contact.
In this paper, a compact triplex-layer and low-frequency metamaterial design scheme is presented. The triplex-layer metal cell can be extended easily and allows for the construction of 5×5 unit-cell sample with dimensions of 36mm x 36mm and operating at a working frequency of 6.78MHz. Results show that using the metamaterial sample in a wireless power transfer (WPT) system results in an efficiency enhancement of 26.8% at a working distance of 15 cm. From simulations and experiments, it is found that the proposed system outperforms two-layer metamaterial-coupled WPT system in terms of efficiency, range and size.
Abstract Poly (terphenylene‐methyl piperidine‐biphenyl) was synthesized using biphenyl, terphenyl, and N‐methyl‐4‐piperidone as raw materials to prepare anion exchange membranes (AEMs). Biphenyl and terphenyl as the copolymer monomers were used to regulate the morphology and properties of the AEMs. The flexible copolymer backbone promoted efficient transport of hydroxyl ions. The obtained AEMs show a high ion conductivity of 49.16 mS/cm at 80°C. Furthermore, the stable piperidine cation and polyarylene chain contributed to the excellent alkaline stability of AEMs that showed only 0.63% deterioration in ion conductivity after soaking in 1 M KOH at 80°C for 720 h. The peak of single cell power density of 54 mW cm −2 was obtained at a load current density of 150.1 mA cm −2 using an aqueous solution containing 1 M methanol and 1 M potassium hydroxide as the anode fuel, and pure oxygen gases as the cathode fuel at 30°C.
In the future, there will be some new application appeared known as
4K/8K high quality video or VR/AR application.These application needs
high bandwidth and low lantacy.In order to meet these requirements,
the flow model of traditional MAN should be changed. This article
describes a new device using in MAN to support spliting DC's and
Internet's flow, support to build edge DC in MAN and change MAN
flow model from pipe type to umbrella type.
Multi-walled carbon nanotube (MWCNT) solar absorbers on aluminium substrates have been prepared by electrophoresis. The MWCNT absorbers exhibit a good spectral selectivity over the visible and infrared wavelengths. However, to further enhance the solar absorption, an anti-reflection coating made from porous silica was spin-coated on top of MWCNT solar absorbers. Porous silica precursor was prepared using tetraethyl orthosilicate (TEOS), and Pluronic F127 was used as a pore-forming agent. A maximum solar absorptance gain of 0.02 was achieved, which improves the spectral selectivity of MWCNT absorbers. The effect of anti-reflection layer depends on not only its thickness/refractive index but also the roughness of aluminium substrate.
Expectation-Maximization(EM) algorithm plays an important role in parameter estimation and in dealing with incomplete data.Considering the unknown parameter of the registration process,the EM algorithm is incorporated with EKF to give the simultaneous registration and track fusion.The algorithm simplifies the optimizing estimation of the maximum likelihood by making the expectation maximal.EKF and smoothing process realize the more exact estimation of the expectation.Registration is realized effectively with iterative algorithm.The simulation result shows the effectiveness of the method.
Track association is crucial to the result of track fusion.The problem of track association when there is systematic error in the radar network was studied,and coarse track association was set up based on the measured positional deviation of different radars.Least square algorithm was adopted to get the corresponding modulus of the left tracks,and the local association threshold was set up with the corresponding modulus.Simulation result shows the effectiveness of the methods.
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