Numerical simulation of pool boiling of a Lennard-Jones liquid

We performed a numerical simulation of pool boiling by a molecular dynamics model. In the simulation, a liquid composed of Lennard-Jones particles in a uniform gravitational field is heated by a heat source at the bottom of the system. The model successfully reproduces the change in regimes of boiling from nucleate boiling to film boiling with the increase of the heat source temperature. We present the pool boiling curve by the model, whose general behavior is consistent with those observed in experiments of pool boiling.     

中国联通音乐基地“云化”改造方案研究

文章结合中国联通当前的音乐平台现状,根据其新的功能需求及基地云化改造的具体要求,基于"沃云"的技术架构,对音乐基地底层服务器资源池的"云化"、云存储建设和业务平台的迁移进行详细设计和说明,为音乐基地的云化实现提供了一套由底至上,分步实施、平稳过渡、切实可行的解决方案。     

融合通信时代业务网发展策略研究

融合通信带来新通话、新消息和新联系的全新体验,为实现和现有业务的无缝过渡,需对现有业务系统进行相应改造。同时为更广的应用融合通信,对业务网的发展策略进行了研究。     

深化核心网IP演进的分析和探讨

中国移动All IP演进已在核心网范围内展开。对TDM/IP混合组网下的主要问题进行深入分析,探讨了如何深化核心网IP演进,促进核心网网络结构进一步清晰、简化。     

MSC Pool改造问题总结

文章主要介绍了在株洲TD—SCDMA网络进行MSC Pool改造过程中发现的相关f引题及其分析与解决,如改造后中终端无法从GSM重选回TD—SCDMA网络、RNC与MSC Server挂接变更导致统计指标数据下降等,为MSC Pool技术改造积累经验。     

SGSN Pool组网设计及演进趋势分析

针对传统的SGSN组网方式存在容灾能力差、分地域分时段负载不均衡等问题,以四川移动SGSNPool规划建设为背景,对SGSNPool技术原理及特点进行了分析和阐述,并结合现网实际情况,总结了SGSNPool规划应遵循的基本原则,提出了详细网络规划方案、创新的参数设计方法,就规划建设中需注意的问题进行了说明。此外,还对SGSNPool与EPC的关系、技术演进趋势进行了分析。     

MSC Pool定向迁移技术研究及应用

本文针对MSC Pool技术在移动网络中大规模应用后产生的跨局呼叫量剧增导致的呼叫时延增加和语音编解码次数增多的问题,进行了深入的分析并提出了有效的解决方案,利用自主发明的技术专利"一种定向迁移的方法"建立了一套定向迁移系统,该系统可以将跨局呼叫变为局内呼叫,从而从根源上解决MSC Pool技术带来的天然缺陷。     

池组(Pool)化技术在EPC核心网中的应用探讨

MME Pool技术作为EPC核心网络安全保障的一个重要手段,能够有效的帮助移动运营商解决LTE核心网络中存在的负载均衡和容灾备份问题,最大化网络资源价值,为客户提供更好的服务质量。文章首先对池组化在EPC核心网的应用进行了介绍,通过对MME Pool技术的负载均衡和容灾备份应用分析,总结出MME Pool的组网规划原则,为MME Pool的部署和应用提供了参考。     

Critical heat flux and nucleate boiling on several heterogeneous wetting surfaces: Controlled hydrophobic patterns on a hydrophilic substrate

We used a heating surface composed of a hydrophilic substrate with hydrophobic dots to characterize the effect of spatially-different surface characteristics on critical heat flux (CHF) and nucleate boiling. To ascertain important surface factors that control CHF and boiling on heterogeneous wetting surfaces, we adjusted the hydrophobic dot diameter and the relative pitch between adjacent dots. Based on the dynamics of bubbles on hydrophobic dots, we analyze the trend of CHF on differently-fabricated heterogeneous wetting surfaces. CHFs on heterogeneous wetting surfaces were strongly dependent on ratio R of the area covered by hydrophobic dots to the heated area, but independent on the diameter of hydrophobic dots and the pitch distance. The improvement of boiling heat transfer (BHT) varied according to the conditions, and appeared to be related to the diameter, pitch distance and the number of hydrophobic dots, but the effect of R on BHT was negligible. Based on this study, we propose optimized conditions of a hydrophobic patterned surface. To sustain high CHF of a hydrophilic surface and high BHT of a hydrophobic surface, numerous micron-size hydrophobic dots should be fabricated with small R.