基于存储区域网的Fiber Channel技术

Fiber Channel是为了适应存储区域网发展需要而兴起的一门新技术，系统分析了光纤通道的结构及特点，比较了Fiber Channel网与传统的以太网在技术上的差异，并通过实例说明了FC-SAN技术的实际应用。     

GC–MS法测定ABS,SAN中残留苯乙烯和丙烯腈单体

建立了气相色谱–质谱法同时测定ABS(丙烯腈–丁二烯–苯乙烯)及SAN(苯乙烯–丙烯腈共聚物)塑料中2种残留单体丙烯腈和苯乙烯的方法。用N,N-二甲基甲酰胺(DMF)萃取,用甲醇将高聚物进行沉淀,分离后取上清液进样分析。丙烯腈及苯乙烯的线性范围为1~500 mg/L,相关系数分别为0.959 7和0.992 9。加标回收率为82.3%~102.2%,测定结果的相对标准偏差为0.74%~2.67%(n=6),检出限(S/N=3)为1.0 mg/kg。该方法灵敏度、准确度高,适合于ABS和SAN中丙烯腈和苯乙烯的检测。     

非线性网络应用结构及发展趋势

本文概述了当前非线性编辑网络中常用的一些结构和这种网络结构中的一些关键技术,以及非线性编辑网络的发展趋势.     

广播音频资料的存储与容灾设计

本文从广播节目存储方式的演变说起,介绍广播电台数字音频资料存储网络建设情况,并结合未来技术发展和应用需求,阐述SAN以及FC和iSCSI等技术在数字音频资料存储领域系统扩充、存储安全、数据迁移、容灾设计等方面的重要作用。     

Interfacial thickness in bilayers of poly(phenylene oxide) and styrenic copolymers

Estimates for the thickness of the interface between poly (2,6-dimethyl-1,4-phenylene oxide) (PPO) and copolymers of styrene–acrylonitrile (SAN) and styrene–maleic anhydride (SMA) based on the theory of Helfand and Tagami are compared to neutron reflectivity (NR) measurements. Good agreement is found between the NR measurements and theoretical predictions that make use of a mean field binary interaction model and previously reported binary interaction energies. The techniques outlined in this work may be used to understand relationships between the mechanical properties of multiphase polymer blends and the fundamental thermodynamics of polymer interactions. © 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 3115–3125, 1998     

基于NAS的机房网络存储系统微探

当今NAS作为主要的网络存储技术之一,越来越受到人们的关注,本文通过对三种外挂存储的比较,提出适用于实验室的NAS存储方案,有效解决传统数据存储及共享中存在的问题。     

Modeling of thermodynamic behavior of PVT properties and cloud point temperatures of polymer blends and polymer blend + carbon dioxide systems using non-cubic equations of state

In recent years, many factors influencing phase behavior of polymer blends have been studied because of their widely technological importance, as a simple method of formulating new materials with tailored properties which make them suitable for a variety of applications. This work has three main goals which were reached by using the Perturbed Chain Statistical Associating Fluid Theory (PC-SAFT) and the Sanchez–Lacombe (SL) non-cubic equations of state (EoS), which in previous works have shown their ability to handle long chain and associating interactions. First, both equations of state were tested with the correlation of the specific volumes of pure blends (PBD/PS, PPO/PS, PVME/PS, PEO/PES) and the prediction of the specific volumes for blends; second, the modeling of blend miscibilities in the liquid–liquid equilibria (LLE) of PBD/PS, PPG/PEGE, PVME/PS, PEO/PES, and PnPMA/PS blends; third, the modeling of the phase behavior of PS/PVME blends at various compositions in the presence of CO₂. PC-SAFT and SL pure-component parameters were regressed by fitting pure-component data of real substances (liquid pressure–volume–temperature, PVT, data for polymers and vapor pressure and saturated liquid molar volume for CO₂) and the fluid phase behavior of blend systems were simulated fitting one binary interaction parameter (k_ij) by regression of experimental data using the modified likelihood maximum method. Results were compared with experimental data obtained from literature and an excellent agreement was obtained with both EoS, which were also capable of predicting the fluid phase behavior corresponding to the critical solution temperatures (LCST: lower critical solution temperature, UCST: upper critical solution temperature) of blends.     

Morphology and Physical Properties of ABS/NBR: The Effect of Melt Viscosity of SAN and the Content of NBR

In several acrylonitrile-butadiene-styrene (ABS) copolymers, some amounts of polybutadiene (PB) laTeX grafted with styrene-acrylonitrile (SAN) copolymer were replaced by acrylonitrile-butadiene rubber (NBR) copolymer, and the variations of morphology, mechanical properties, and rheological properties were examined. The impact strength of ABS, with a bimodal distribution of rubber size, was improved by the presence of the NBR, which distributes coarsely in the SAN matrix. Yield behavior in the rheological response due to the presence of rubber particles in the SAN matrix was enhanced by the coarser NBR particles, especially at high temperature.     

基于FCP的交换结构研究

FCP是在存储区域网中用FC协议承载SCSI数据的一种通信方式．它不同于一般的面向无连接的IP通信．也与通常的专线连接有区别。另外，在通信过程中存在控制信息和投据信息两种数据包，即长包和短包。它不是定长分组，但它又与传统的变长分蛆有区别。由于FCP通信的特殊性，需要研究哪种交换结构最适合其要求。通过对VOQ＋Crossbar．共享缓存和一种政平面交换结构的仿真分析表明，双平面交换结构在性能上有一定的优势。