注凝析油开采稠油的地质工艺

在西西伯利亚俄罗斯油田开展了注凝析油开发稠油的研究，现场实验结果表明，注入25%的凝析油，可使其混合液粘度达到原高粘油粘度的1/60，以俄罗斯油田为例，探讨了注凝析油矿场试验的可行性，预测了凝析油的用量和可能产出的油量，并对原油外输提出了一系列更换工艺设备的要求。     

LCD高清晰度投影式多媒体显示器的关键技术与应用研究

本文简述了LCD液晶显示器成像显示原理，着重论述了高清晰度LCD多媒体显示器的关键技术和应用实例，同时介绍了TFF—LCD的发展状况及趋势。     

基于OSEK规范的网络管理的研究与改进

首先论述了基于OSEK规范的网络管理特点并对OSEK网络管理的工作机制进行了详细分析;在基于OSEK网络管理特点和工作机制的基础上,对OSEK网络管理在以太网上的扩展、资源占有率优化和实时性提高几个方面给出了解决方案。     

基于SPW的流星余迹极低信噪比通信系统建模与仿真*

SPW具有丰富的通信库和DSP库,且具有灵活的自定义模块能力,是一种复杂通信系统建模和仿真工具.流星余迹通信是一种特殊的通信方式,在通信领域中具有特殊的重要地位.介绍了流星余迹极低信噪比通信系统原理的基础,给出了基于SPW的流星余迹极低信噪比通信系统仿真模型及仿真结果.     

In vitro comparison of hepatic metabolism of 9cis-11 trans and 10trans-12cis isomers of CLA in the rat

Hepatic metabolism of the two main isomers of CLA (9cis-11 trans, 10trans-12cisC_18∶2) was compared to that of oleic acid (representative of the main plasma FA) in 16 rats by using the in vitro method of incubated liver slices. Liver tissue samples were incubated at 37°C for 17h under an atmosphere of 95% O₂/5%CO₂ in a medium supplemented with 0.75 mM of FA mixture (representative of circulating nonesterified FA) and with 55 μM [1-¹⁴C]9cis-11 trans C_18∶2, [1-¹⁴C]10trans-12cis C_18∶2, or [1-¹⁴C]oleate. The uptake of CLA by hepatocytes was similar for both isomers (9%) and was three times higher (P<0.01) than for oleate (2.6%). The rate of CLA isomer oxidation was two times higher (49 and 40% of incorporated amounts of 9cis-11 trans and 10trans-12 cis, respectively) than that of oleate (P<0.01). Total oxidation of oleate and CLA isomers into [¹⁴CO₂] was low (2 to 7% of total oxidized FA) compared to the partial oxidation (93 to 98%) leading to the production of [¹⁴C] acid-soluble products. CLA isoemrs escaping from catabolism were both highly desaturated (26.7 and 26.8%) into conjugated 18∶3. Oleate and CLA isomers were mainly esterified into neutral lipids (30%). They were slowly secreted as parts of VLDL particles (<0.4% of FA incorporated into cells), the extent of secretion of oleate and of 10trans-12 cis being 2.2-fold higher than that of 9cis-11 trans (P<0.02). In conclusion, this study clearly showed that both CLA isomers were highly catabolized by hepatocytes, reducing their availability for peripheral tissues. Moreover, more than 25% of CLA escaping from catabolism was converted into conjugated 18∶3, the biological properties of which remain to be elucidated.     

一种PDA智能抄表导航监控系统浅析

正1 PDA智能抄表导航监控系统背景现行抄表管理模式:人工抄表方式、IC卡表预收费方式、自动抄表方式。目前IC卡表预收费方式和自动抄表方式正处在逐步实施和推广应用阶段,但我国许多地区的抄表工作还完全依赖人工手动抄表方式。随着高科技信息技术的发展,为电力     

电能计量仪表自动化库房系统研究

正1研究背景近几年各供电公司普遍实现了智能电能表的条形码管理,在此基础上,电力营管理系统可以快捷地对电力企业的电能表等资产进行信息化、网络化管理,但是,现有电能计量表库的库房管理系统没有与网络化相适应的自动化设施作为物质基础,目前已经成为智能电能表管理