随机波动模型估计方法研究进展

本文对随机波动模型估计方法取得的进展进行了综述与简评，并提出了今后值得研究的一些相关问题。     

Comparison of hydrogen generation for TVSM and TVSA fuel assemblies for water water energy reactor (VVER)-1000

This paper presents the results received during investigation of hydrogen generation for both types fuel assemblies—the old modernistic type of fuel assemblies (TVSM) and recently installed new one alternative type of fuel assemblies (TVSA) in case of severe accident. There are some differences between both types FAs. They have different geometry as well as different burnable poisons. To investigate behavior of new fuel assemblies during the severe conditions it have been performed comparison of fuel behavior of old type TVSM fuel assembly to new one TVSA.To perform this investigation it has been used MELCOR “input model” for Kozloduy Nuclear Power Plant (KNPP) VVER 1000. The model was developed by Institute for Nuclear Research and Nuclear Energy-Bulgarian Academy of Sciences (INRNE-BAS) for investigation of severe accident scenarios and Probabilistic Safety Analyses (PSA) level 2. The model provides a significant analytical capability for the Bulgarian technical specialists, working in the field of the NPP safety, for analysis of core and containment damaged states and the estimation of radionuclides release outside fuel cladding.It was accepted criteria for vessel integrity about hydrogen concentration to be 8%. This criterion was based on the decision of RSK (Germany commission for reactor safety).Generally based on the received results it was made conclusion that using both types of fuel assemblies it was not disturbance safety conditions of NPP.     

智能变电站冗余数据处理方案的研究与应用

针对智能变电站过程层及间隔层数据采集设备双套配置产生的两类冗余数据如何处理的技术问题,提出由数据接收方通过数据辨识进行筛选的方案。对站控层遥测数据及过程层SV数据采用按点实时筛选的方式,对站控层遥信数据及过程层GOOSE数据采用动态筛选和静态筛选相结合的方式。理论分析和此方案在多个实际工程的应用情况表明,该方案不增加、不修改硬件设备,处理逻辑清晰,对提高智能变电站数据可靠性、方便运行检修等方面具有积极意义。     

P—SV波AVO分析

参照 Aki和 Richards的近似方法 ,本文对 Zoeppritz方程所描述的 P- SV波反射系数公式的角度项进行了泰勒展开 ,并保留了密度和速度的二阶项 ,得出一个新的反射系数近似公式。对 4个三层含气砂岩模型的定量计算表明 ,该近似公式所得出的计算结果在入射角小于 4 0°时与由 Zoeppritz方程给出的精确解吻合得很好 ,甚至优于 Aki和 Richards公式的近似效果 ,很适合大入射角的 AVO参数反演和理论研究。以新的近似公式为基础 ,文中分别从不同岩性参数表示的转换波反射系数、P- SV转换波的 AVO加权叠加方法及 P- P波和 P- SV波AVO联合反演等三个方面深入讨论了利用该近似公式进行岩性参数反演的过程     

基于PowerPC的微电网智能终端设计

详细介绍了以PowerPC为核心处理芯片的海岛微电网智能终端设计。微电网智能终端和上层控制器通信,完成一个间隔内配电变或线路的断路器操作控制和状态监视;通过过程层网络基于SV服务发送模拟量,基于GOOSE服务采集和发布状态信息,接收控制指令驱动操作回路来完成断路器的控制功能;并且具有过流保护功能,可作为变压器、低压母线和线路的后备保护,数据和命令传输满足IEC61850通讯标准要求,给出了软硬件设计和测试结果。     

220kV智能变电站过程层网络设计研究

根据220kV智能变电站过程层网络通用设计方案的特点,介绍过程层组网和交换机配置的优化方案,分析变电站220kV、110kV系统的特点和信息交换需求,论证过程层子交换机和中心交换机的配置方案,提出多台中心交换机级联时应遵守的原则。     

智能变电站用选相合闸装置的研究

智能变电站模拟量采用采样值SV报文传送,开关量采用GOOSE报文形式传递.针对这些与常规站的显著改变,就智能变电站选相合闸装置的实现,提出了3种实现模式:独立选相合闸装置模式、选相合闸和开关智能单元一体化模式、综合智能单元模式,并对比分析了3种模式的技术性和经济性.同时对智能变电站选相合闸装置研制的关键技术——智能选相...     

A Single Dose of Psilocybin Increases Synaptic Density and Decreases 5-HT2A Receptor Density in the Pig Brain

A single dose of psilocybin, a psychedelic and serotonin 2A receptor (5-HT_2AR) agonist, may be associated with antidepressant effects. The mechanism behind its antidepressive action is unknown but could be linked to increased synaptogenesis and down-regulation of cerebral 5-HT_2AR. Here, we investigate if a single psychedelic dose of psilocybin changes synaptic vesicle protein 2A (SV2A) and 5-HT_2AR density in the pig brain. Twenty-four awake pigs received either 0.08 mg/kg psilocybin or saline intravenously. Twelve pigs (n = 6/intervention) were euthanized one day post-injection, while the remaining twelve pigs were euthanized seven days post-injection (n = 6/intervention). We performed autoradiography on hippocampus and prefrontal cortex (PFC) sections with [³H]UCB-J (SV2A), [³H]MDL100907 (5-HT_2AR antagonist) and [³H]Cimbi-36 (5-HT_2AR agonist). One day post psilocybin injection, we observed 4.42% higher hippocampal SV2A density and lowered hippocampal and PFC 5-HT_2AR density (−15.21% to −50.19%). These differences were statistically significant in the hippocampus for all radioligands and in the PFC for [³H]Cimbi-36 only. Seven days post-intervention, there was still significantly higher SV2A density in the hippocampus (+9.24%) and the PFC (+6.10%), whereas there were no longer any differences in 5-HT_2AR density. Our findings suggest that psilocybin causes increased persistent synaptogenesis and an acute decrease in 5-HT_2AR density, which may play a role in psilocybin’s antidepressive effects.     

利福霉素SV高产菌株0124-8~#的选育

以现有生产菌株11#为出发菌株,进行硫酸链霉素抗性诱变。采用梯度平板及琼脂块法筛选,得到0124-8#菌株。试验结果表明,其发酵单位大幅度提高,较出发菌株提高了8.9%,并且其遗传稳定性较好。