A streams-based communications subsystem in turing plus for protocol development

The Homogeneous Multiprocessor (HM) has a linear-array topology, with interprocessor communications achieved by the sharing of memory between nearest neighbours, by adjacent-processor signalling, and through a high-speed network (the H-Network). The operating system nucleus (the HM-Nucleus) for the HM contains a communications subsystem that provides low-overhead communications, both for user processes and for the rest of the HM-Nucleus, using the shared memory, the signalling capability, and the H-Network. The design for the communications subsystem provides uniformity of access to the three mechanisms by following the IEEE 802.2/802.3 LLC/MAC specifications. Flexibility of access is achieved by adopting the STREAMS facility from System V UNIX. A new implementation of STREAMS has been built using Turing Plus for both the programming and the simulation/testing, with no need to access the actual hardware until final test. Completion of the STREAMS framework has made it possible subsequently to code an 802.2 LLC module and an 802.3-based shared memory driver very quickly. The STREAMS framework has also made it feasible to cast some algorithms used by other parts of the HM-Nucleus as protocols, and implement them as STREAMS modules, resulting in considerable simplification in the design process. Since the framework was designed to be completely independent of the host processor, it provides a very general vehicle for protocol development.     

Correlation of H2S solubility in aqueous MDEA solutions using electrolyte-modified Peng-Robinson plus association equation of state

In this survey, we use the emPR-CPA equation of state to model a ternary system of H₂S solubility in MDEA aqueous solution at different solution compositions, temperatures, pressures, and acid gas loadings. For electrolyte part of the model, MSA theory and the Born term were used. There were 302 experimental data used in this work. To model a ternary system, at first pure components, then binary subsystems, and finally ternary system were modeled using a reactive bubble point pressure calculation method. An overall absolute average deviation percentage equal to 20.85 was achieved so that show the model efficiency for correlation of such systems.     

砂岩渗透性能微观图像分形分析

砂岩渗透性能一般都通过实验室或野外试验测试确定。本文基于岩石微观空隙分形特点．确立了岩石渗透率与分形维数的定量关系,实现了直接利用岩芯电镜扫描微观图像分形技术测定岩石宏观渗透性能的目标。为了精确统计SEM图像中不规则孔的面积、周长、半径、个数等参数,解决获取切片孔喉分形维数这一难题,应用Imagepro plus专业图像软件处理扫描电镜切片图像。将岩石渗透率理论值与实验室渗透率测定结果对比,结果表明：宏观渗透率与微观分形参数D的理论关系式成立,具有工程应用推广价值。     

基于Image-ProPlus环境的数字心电图波形测量处理

介绍了在Image-Pro Plus环境中测量数字心电图机波形数据的方法。将波形图纸数字化,再测量其波形的幅度、频率等参数。应用实践表明,该方法简便有效。     

预测汽油分子组成的MTHS分子矩阵模型

针对MTHS分子矩阵的分子表征优化模型进行改进,提出了一种通过工业常用的物性参数估计汽油分子组成的方法。使用蒸馏曲线和密度等工业常用参数,由相关性公式计算得到其他整体性质,以各项性质实测值与预测值的残差平方和为目标函数建立优化模型,并利用遗传算法对模型进行优化求解,得到预测的汽油馏分分子组成。由Aspen Plus模拟软件计算9组已知组成的汽油试样的整体性质,并应用改进模型对9组汽油试样进行分子组成预测。实验结果表明,改进模型较原始模型的精度更高,可用来近似估计汽油馏分的分子组成。     

萃取精馏分离甲基环己烷和甲苯工艺过程的模拟

利用Aspen Plus流程模拟软件,采用双塔流程,以苯酚为萃取剂,对萃取精馏分离甲基环己烷(MC)和甲苯(MB)的过程进行模拟计算,并用实验验证。考察了萃取精馏塔的萃取剂进料位置、原料进料位置、萃取剂与原料的摩尔比(溶剂比)和回流比等因素对分离效果的影响。在满足MC产品的纯度和收率均达到99%的条件下,模拟优化的结果为:理论塔板数为24块,原料在第17块板进料,萃取剂在第5块板进料,溶剂比3.08,回流比5。模拟结果与实验数据吻合较好,说明采用的模拟方法适用于MC和MB混合物萃取精馏过程的模拟。     

Aspen Plus软件在浓硝酸制备工艺上的应用

介绍了在浓硝酸制备工艺过程中使用Aspen Plus软件开发包括热力学在内的全流程模拟模型及其应用情况。测试了硝酸质量浓度为68．4％时，硝酸与水存在共沸现象，通过加入硝酸镁溶液打破共沸，模拟出浓硝酸的质量浓度超过了90％。在硝酸装置的模拟计算中，采用了Wilson活度系数模型计算方法，其模拟结果与装置标定数据基本吻合。     

聚丙烯装置建模过程分析及应用

应用Polymers Plus和Aspen Dynamics软件建立聚丙烯装置稳态及动态模型．详细介绍了建立稳态模型的主要步骤，对建模过程的难点和影响模型准确程度的因素进行了分析。指出聚丙烯装置建模过程的关键在于确定物性参数及应该包含的反应；难点在于多牌号单活性中心稳态模型的优化。