浅析全业务运营背景下的城域网业务控制层技术

全业务竞争背景下,城域网的建设重点聚焦在业务控制层面,以满足融合业务的承载需求。针对各类业务的特征,本文主要分析了城域网的业务控制层相关技术(MPLS VPN、QoS、接入认证技术等)以及部署方式进行一定程度的探讨。     

Effect of fin type baffle on the particle hydrodynamics,separation and misplacement in a liquid solid fluidized bed separator

Use of fluidization phenomenon is increasing day by day in the mineral beneficiation. Owing to the physical properties of the mineral particles, misplacement happens during the segregation. The present study aims at understanding the effect of fin type vertical baffle along with parameters such as superficial velocity, overflow height, feed composition and Mean Particle Size Ratio (MPSR) on the particle misplacement and separation in a liquid solid fluidized bed separator. The particle misplacement was evaluated quantitatively using “Misplacement Index”. It was found that the fin type vertical baffles have negligible or no effect on the particle misplacement. Moreover, change in the superficial velocity, overflow height, feed composition and MPSR substantially affects the particle misplacement. Further, there exists a critical feed composition where the misplacement is low. In addition to this, there also exists a critical MPSR where the fluidized bed operates in a completely mixed state and the point could be considered as the starting of the layer inversion.     

A comprehensive study on the effects of alternative sulphur precursor on the material properties of chemical bath deposited CdS thin films

Chemical bath deposition (CBD) method was used to deposit CdS thin films on soda-lime glass substrates by using n-methylthiourea (NTU) as an alternative sulphur source and were compared to typical thiourea (TU) precursor. The sulphur source concentration was varied from 0.01 M to 0.1 M and the impact on the microstructural, surface morphology, optical and electrical properties of the grown films were studied. Increasing n-methylthiourea concentration in the precursor yielded thinner films that are less than 100 nm thickness, surface morphology with average surface roughness of 6.4 nm, larger granular structure, wider band gap at 2.3 eV–2.6 eV range. Raman spectroscopy revealed Raman peak at 303 cm-1. In contrast, an increase in thiourea concentration resulted in thinner amorphous films, less distinct granular structure, narrower energy band gap from 2.3 eV to 2.4 eV and a resonance Raman peak at 302 cm-1. CdS thin film deposited from n-methylthiourea precursor at higher precursor concentration of 0.1 M showed better electrical properties such as lower resistivity and higher carrier mobility compared to the thin film deposited from typical thiourea precursor.     

数字城市、智慧城市顶层设计探讨

本文简要阐述了智慧城市顶层设计的概念和重要性，对智慧城市顶层设计的方法进行了论述，然后提出顶层设计要注意的几个问题等。     

The interaction of epoxy adhesives with steel surfaces

Deformable sandwich sheet materials have the advantage to be produced as raw materials and to be formed afterwards to even complex geometries. Moreover they are cost effective and predestinated for mass production. For such systems the necessity is given for a good bonding to guarantee a good shear transfer between the single layers. Because of deformation, failures by delamination often occur at the interface between the metal and the epoxy layer. Therefore investigations at this interface were performed using Atomic Force Microscopy (AFM) and X‐ray Photoelectron Spectroscopy (XPS), to understand the basic effect of the surfaces’ bonding behavior in selected preparation steps of the system. Basic information about the adhesion mechanisms between the stainless steel 316L and the epoxy is given. The chemical interaction between the epoxy and the steel results in a significant reduction of Fe³⁺ to Fe²⁺.     

网络电视台数据中心监控平台设计构想

本文对网络电视台数据中心监控平台的设计框架进行了简要描述，并阐明了其设计目标、设计思路。同时描述了该平台的技术路线和实现方案。     

大型液晶显示用COF带的现状和未来

概述了从TAB带到COF带的转换,大型LCD用的COF带的微细线路形成技术和高可靠性技术以及COF带制造技术的未来。     

龙虎泡油田L126井区地质建模及优化水平井设计

龙虎泡油田L126井区为典型的低孔低渗油藏,经过多年开采综合含水率较高。通过对L126井区油藏三维地质建模及精细油藏描述,认为高Ⅲ3层孔隙度、渗透率、有效厚度、砂体连通性及剩余油含量均较高,适合作为水平井目的层。设计了L126-P14水平井,位于直井L124-14与L124-15之间,水平段长度440 m,水平位移787.74 m,地层倾角0.3°~0.5°,目的层标准层垂深1 699.0 m,完钻垂深1 849.6 m,钻遇层段2 067~2 503 m。油藏数值模拟结果表明,L126-P14水平井与周围直井相比产油量提升明显,验证了水平井设计的合理性。     

双电层电容器的研制与应用

本文概述了双电层电容器的原理与特征,以明电合公司研制的M—CAP系列为例,介绍双层电容器的结构与性能参数;并对M—CAP在直流电气铁道的储能装置和半导体制造设备上的应用实例予以介绍。