摘要：提出在基于电压源换流器的高压直流输电(VSC-HVDC)中采用多通道变参数的次同步附加阻尼控制(SSDC)来抑制次同步振荡的方法。在PSCAD/EMTDC中搭建了并联VSC-HVDC的IEEE次同步谐振第一标准测试系统,通过测试信号法得到在不同工况下发电机电磁转矩对调制功率的相位滞后特性,据此选择合理参数设计多通道变参数的SSDC。对并联VSC-HVDC的IEEE次同步谐振第一标准测试系统进行仿真表明,VSC加装多通道变参数SSDC后对次同步振荡有很好的抑制作用,并具有一定的鲁棒性。

摘要：为保证现有电子阅览室设备在IPv4/IPv6过渡时期的正常运转,提出一种采用开源软件搭建的模块化安全网关系统设计方案,并详细阐述设计步骤。运行测试表明该系统性能良好、工作稳定。

摘要：采用液中干燥法制备多柔比星聚酯微球,使用星点设计-效应面法优化制备工艺。以药物与药物和聚β-羟基丁酸酯(PHB)总量的重量比、有机相中PHB浓度和水相中聚乙烯醇(PVA)浓度为自变量,载药量、包封率、粒径和跨距为因变量,分别进行多元线性回归和二次多项式拟合。结果表明,4个方程均采用二次多项式拟合的效果较好。根据因变量效应面选择的较佳工艺条件为药物与药物和PHB总量之比6%、PHB浓度50mg/ml、PVA浓度6.5%,按优化工艺制得的微球形态圆整,载药量、包封率、平均粒径和跨距分别为1.0%、16.8%、43.1μm和1.45,体外释放60d累积释放65%。

摘要：首先应用层次分析模型构建"基本公共文化服务水平评价指标体系",进而利用空间统计学分析我国基本公共文化服务水平省区差异及空间分布格局。研究发现:我国基本公共文化服务水平由东向西逐渐降低;空间分布在地理呈现集聚格局,东部沿海经济发达的7个省区市形成H-H热点集聚区,中部服务水平较高的四川省成为一个极地,其余省区不显著。最后分析其原因并提出有针对性的政策建议。

摘要：目的探讨基于51单片机为嵌入式系统内核的智能医疗器械远程升级模块的实现原理和具体实现方法。方法利用SST89E58RD2单片机的BLOCK0与BLOCK1 FLASH存储块,通过单片机的IAP接口,配合上位机软件实现远程升级功能。结果通过实际运行测试,此方案可行。结论利用本方案可实现远程升级功能,并且造价低廉,通用性强,适用于小型智能医疗器械。

摘要：目的通过手机APP实现远程控制汽车驾乘装备,并且具备个性化设置功能。方法将微控制器、无线传输模块、车身通讯线路以及包含霍尔传感器的电机控制系统连接到一起,实现控制系统的整体架构。结果实现整车CAN信号捕获,建立一种可以根据人体体态参数自动调节驾乘装备位姿的个性化设置模型,完成整体系统的低功耗设计。结论结果表明该系统能够实现在驾乘装备个性化设置方面人、车、手机的互联互通。

摘要：Ahn To develop a high resolution HPLC method for the determination of ondansetron in human plasma and to study the pharmacokinetics of ondansetron in orally disintegrating tablets. Methods HPLC determination involved liquid-liquid extraction, separation on a CN column and ultraviolet detection at 310 ran with granisetron as an internal standard. Pharmacokinetics and bioequivalence of ondansetron in orally disintegrating tablets by direct compression and conventional 8 mg tablets were evaluated and compared in 20 healthy human male volunteers after a single oral dose in a randomized cross-over study. Results The limit of quantification was 0.25 ng· mL^-1. The recovery was about 85 % or over for ondan setron and about 90% for internal standard. Linearity was good within the concentration range of 0.5 - 50 ng·mL^-1 with r^2 ranging from 0.997 1 to 0.999 9. Intra- and inter-assay coefficients of variation ranged from 1.78% to 2.38% and 3.88% -5.19%, respectively. Accuracies for spiked concentrations of 2.0, 10.0, and 30.0 ng·mL^-1 were 104.7% ±4.4%, 102.2% ± 1.1%, and99.51% ±2.34%, respectively. Pharmacokinetic parameters of AUCo-t, AUCo-∞ , Cmax, Tmax, and T1/2 were 230.2 ± 78.0 ng·h·L^-1 , 265.2± 101.5 ng·h·mL^-1, 35.67 ± 8.94 ng·mL^-l, 1.51 ±0.79 h, and 5.00± 1.41 h for orally disintegrating tablets, respectively. The analysis of variance did not show any significant difference between orally disintegrating tablets and conventional tablets, and 90% confidence intervals fell within the acceptable range for bioequivalence. Conclusion High resolution HPLC method has been set up and applied in pharmacokinetic evaluation of ondansetron in orally disintegrating tablets.