致密砂岩气藏高渗透带与古构造关系探讨—以川中川南过渡带内江—大足地区上三叠统须二段致密砂岩气藏为例

通过对川中川南过渡带内江—大足地区上三叠统须二段低渗透致密砂岩气藏的研究,指出:该区高产井呈带状分布并与古构造有密切的关系;沉积作用中古构造带顶部及两翼为水体的高能带,沉积了成熟度较高的粗颗粒,并且在成岩过程中由差异压实作用形成了裂缝,使古构造带顶部及两翼变为有利的油气聚集区带;远离古构造带翼部的沉积成岩条件相对较差,储层物性变差,于是在古构造带上就形成了岩性油气藏.     

GSM网络短信增值业务实现方案

本文介绍了短信增值业务的业务属性和种类,通过分析GSM网络中短信业务的流程,提出了多种实现方案,并对各种方案的优缺点进行分析,为进行短信增值业务平台建设提供参考借鉴。     

泛在、移动互联网的体系结构

文章针对现有互联网由于原始设计模式方面的不足,难以满足泛在、移动用户的多元化网络服务需求的问题,创造性地提出全新的泛在、移动互联网体系理论与总体框架;创建一种。基础设施层。模型与理论,解决用户在任何地点、任何时间、以任何方式接入到互联网的问题;建立一种。普适服务层”模型与理论,实现对普适服务的支持;并提出新网络体系下的移动性管理机制。新的网络体系结构可克服现有互联网存在的弊端,有效满足泛在、移动方面的多元化网络服务需求。     

使用OBSAI协议搭建多模基站的基带射频接口

开放基站架构协议（OBSAI）特有的帧结构可以很方便地传输不同无线标准的数据,以它为基础搭建多模基站的基带射频接口可以有效地隔离不同无线标准对数据传输链路的影响,真正实现在一个硬件平台上同时支持各种无线标准。使用OBSAI协议搭建多模基站的基带射频接口,只需更换基带单元和射频单元即可支持新的无线标准,只要光接口速率没有改变,其他单元的软件、硬件和逻辑都无需改动。     

号码携带现场试验业务管理相关问题的研究

主要介绍了我国实施号码携带业务现场试验时,所确定的号码携带业务管理相关方面的规定,以及我国对管理相关问题的分析和考虑。     

下一代互联网研究方向与趋势

"业务综合"和"网络融合"是通信界多年来努力的目标。IP网络具有承载包括语音、数据和视频等多种业务应用能力,这使业界将全IP网络看作是未来融合网络的雏形。但目前的IP网络无法保证实时业务的服务质量以及网络和业务的安全性。为了在下一代互联网发展方面处于领先地位,全球各国都在不断投入力量进行下一代互联网的研究工作。本文主要介绍IP网络和业务的发展情况、目前IP网络存在的问题以及全球在发展下一代互联网方面所做的努力。     

Analysis and Comparison of Location Strategies for Reducing Registration Cost in PCS Networks

In mobile environments, a personal communication service (PCS) network must keep track of the location of each mobile user in order to correctly deliver calls. A basic scheme used in the standard IS-41 and GSM protocols is to always update the location of a mobile user whenever the mobile user moves to a new location. The problem with this approach is that the cost of location update operations is very high especially when the mobile user moves frequently. In recent years, various location management strategies for reducing the location update cost have been proposed. However, the performance issue of these proposed algorithms remains to be investigated. In this paper, we develop two Markov chains to analyze and compare the performance of two promising location update strategies, i.e., the two location algorithm (TLA) and the forwarding and resetting algorithm (FRA). By utilizing the Markov chain, we are able to quickly answer what-if questions regarding the performance of PCS networks under various workload conditions and also identify conditions under which one strategy can perform better than the others. Using the cost due to location update and search operations between two successive calls to a mobile user as a performance measure, we show that when the mobile user exhibits a high degree of locality and the mobile user's call-to-mobility ratio (CMR) is low, TLA can significantly outperform both FRA and IS-41. On the other hand, when CMR is high, FRA is the winner. Furthermore, unlike TLA which may perform worse than IS-41 at high CMR values, FRA at identified optimal conditions can always perform at least as good as IS-41, suggesting that FRA over TLA should be used as a generic scheme in reducing the location cost in the PCS network to cover all possible per-user CMR values.     

Influence of the distance between target and substrate on the properties of transparent conducting Al-Zr co-doped zinc oxide thin films

Highly transparent and conducting Al-Zr co-doped zinc oxide (ZAZO) thin films were successfully prepared on glass substrate by direct current (DC) magnetron sputtering at room temperature.The distance between target and substrate was varied from 45 to 70 mm.All the deposited films are polycrystalline with a hexagonal structure and have a preferred orientation along the c-axis perpendicular to the substrate.The crystallinity increases obviously and the electrical resistivity decreases when the distance betwe...     

Web服务技术-大数据抓取及存储的研究与实现

简述web服务的关键技术以及其发展的过程,并对一些关键技术进行阐述,web服务是有自己独特的体系,拥有自己的一套架构,并且在这套架构上,web服务拥有自己的核心技术,当单个的web服务难以满足需求的时候,这时候web服务组合就出现了,它能够很好的解决单个web所不能解决的问题,这个很好的满足了现代社会的需求,最后提出web服务技术的未来,其中重点是说明web服务的核心技术。随着网络的兴起,web服务技术被广泛应用于大数据的海洋抓取,比如代购网站中,就需要用到数据的海洋抓取和存储。     

关于IP数字电视前端的新思考

三网融合促进广电运营商由单向广播业务向双向互动业务转变,广电运营商与电信运营商在业务上同质化发展,形成交叉和竞争,业务内容的相近和相同驱使双方在网络结构上相互渗透。近几年来广电运营商根据新业务的需求,在网内引入互联网技术,使传统ASI前端向IP化前端过渡,以打破ASI前端在业务拓展方面的限制,不断探索IP前端下增值业务的发展,并不断挖掘IP前端在新的市场环境中所能起到的作用,阐述IP前端在技术上的优势并讨论其对广电运营商平台建设和对新业务的有力支撑。