Knowledge-Based Efficient N-1 Analysis Calculation Method for Urban Distribution Networks with CIM File Data

The N-1 criterion is a critical factor for ensuring the reliable and resilient operation of electric power distribution networks.However,the increasing complexity of distribution networks and the associated growth in data size have created a significant challenge for distribution network planners.To address this issue,we propose a fast N-1 verification procedure for urban distribution networks that combines CIM file data analysis with MILP-based mathematical modeling.Our proposed method leverages the principles of CIM file analysis for distribution network N-1 analysis.We develop a mathematical model of distribution networks based on CIM data and transfer it into MILP.We also take into account the characteristics of medium voltage distribution networks after a line failure and select the feeder section at the exit of each substation with a high load rate to improve the efficiency of N-1 analysis.We validate our approach through a series of case studies and demonstrate its scalability and superiority over traditional N-1 analysis and heuristic optimization algorithms.By enabling online N-1 analysis,our approach significantly improves the work efficiency of distribution network planners.In summary,our proposed method provides a valuable tool for distribution network planners to enhance the accuracy and efficiency of their N-1 analyses.By leveraging the advantages of CIM file data analysis and MILP-based mathematical modeling,our approach contributes to the development of more resilient and reliable electric power distribution networks.

Photoluminescence and ratiometric thermo-response of Eu^(2+)and Eu^(3+)in BaAl_(2)B_(2)O_(7):Eu^(2+),Eu^(3+)phosphor materials

A novel Eu^(2+)-Eu^(3+)co-activated ratiometric thermo-sensitive phosphor was developed and synthesized by solid-state reaction.The valence state of Eu,photoluminescence and thermo-sensitive performance of the phosphor prepared either in ambient air or carbothermally were investigated and discussed.The phosphor shows high sensitivity(Sa=0.0173 K^(-1),S_(r)=0.461%/K)and superior signal discriminability(Δν∼10380 cm^(−1)).The thermo-sensitive performance is subject to the dual effects of different thermo-responses by Eu^(2+)versus Eu^(3+)combined with energy transfer from Eu^(2+)to Eu^(3+),so that the sensitivity of the phosphor in the temperature range presents a non-monotonic trend.The development of the BaAl_(2)B_(2)O_(7):Eu^(2+),Eu^(3+)phosphor is not only expected to be relevant for application in the field of temperature sensing,but also of reference significance for improving the sensitivity by means of energy transfer between co-activator ions over a wider temperature range of Eu^(2+)-Eu^(3+)co-activated ratiometric thermo-sensitive phosphors.

2种生态型芦苇RCA基因特征及表达特异性

芦苇(Phragmites australis)分布范围广,生物量巨大,环境适应性强。受芦苇多倍体基因组的限制,在基因水平上解释其独特的物种特质非常困难。利用三代测序及多种方法研究2种生态型芦苇(2n=8x)中RCA基因(编码Rubisco活化酶)的类型、结构、表达和定位模式。结果表明,芦苇基因组中有4类RCA基因,均属于RCA2β。转录水平和蛋白质水平检测以及免疫胶体金定位结果表明,芦苇RCA的基因表达模式和蛋白质定位具有明显的生态型特异性。与沼泽芦苇(SR)相比,沙丘芦苇(DR)中RCA的表达水平较低,且更倾向于产生RCA2-β2产物。通过分相的蛋白双向电泳和质谱方法,鉴定到6个高表达的RCA同型物。在DR中这些同型物高比例地分布于膜相。研究表明当芦苇处于极度恶劣的沙漠环境中, RCA转移到膜相并参与叶绿体的膜保护机制。

Recent progress in theranostic microbubbles

Ultrasonography is an important complement to clinical diagnosis,and the application of microbubbles effectively improved diagnostic accuracy in echography.In scientific research,the sizes of microbubbles range from nanometers to microns.By optimizing the fabrication process,bubble sizes and ultrasound parameters,microbubbles can also be used for drug delivery and therapeutic monitoring.In this review,we summarize the recent advances in the diagnosis and treatment of microbubbles according to their different components.Modification of microbubble shells allows for more accurate imaging and detection and the combined utilization of US-targeted MB destruction(UTMD)allows for non-invasive,precise and targeted delivery of drug molecules to pathological tissues.These features pave the way for the emerge of theranostic microbubbles by combination of functional compositions and the application of multifunctional materials.Theranostic microbubbles allow for the simultaneous process of diagnosis,visualization of drug delivery and therapeutic monitoring.Ultimately,theranostic microbubbles are promising in clinical practice and would enhance contrast-enhanced US(CEUS)to a new qualitative level.

基于结构方程模型的老年人社区临终关怀服务需求的影响因素

目的分析基于结构方程模型的老年人社区临终关怀服务需求的影响因素。方法运用多阶段抽样方法, 于2020年9—11月对北京市朝阳区4个片区40家社区卫生服务中心的564例老年人采用自行设计的问卷进行调查, 调查内容包括倾向特征、使能资源和需求因素3个维度, 应用χ2检验、秩和检验分析老年人社区临终关怀服务需求的影响因素, 同时基于安德森理论, 应用结构方程模型分析影响因素的作用路径及效应大小。结果户籍、职业、社区养老服务了解程度、社区就医便捷认同度、社区卫生服务减轻家庭负担认同度、社区卫生服务改善自身健康认同度、社区临终关怀服务了解程度、家庭平均月收入、收入满足程度、前一年自付医疗费、居住状态、社区就诊费用接受度、社区医护人员数量满意度、健康状况自评、过去2周是否患病以及患慢病种类数均是老年人社区临终关怀服务需求的影响因素(均P<0.05)。在安德森模型3个维度中, 使能资源可直接产生影响, 也可通过需求因素间接产生影响, 总效应值为0.404;需求因素可直接产生影响, 效应值为0.193;倾向特征可通过使能资源和需求因素间接产生影响, 总效应值为0.176。使能资源维度中社区卫生服务就诊费用接受度影响最大(FL=0.535), 需求因素维度中患慢病种类数影响最大(FL=1.018), 倾向特征维度中社区卫生服务减轻家庭负担认同度影响最大(FL=0.612)(均P<0.05)。结论影响老年人社区临终关怀服务需求的因素和作用路径多样, 其中社区卫生服务就诊费用接受度、患慢病种类数、社区卫生服务减轻家庭负担认同度影响较大。