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基于改进地形重构的SSPE传播预测方法 被引量:1
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作者 高颖 陈局非 +1 位作者 郭淑霞 耿鑫 《电波科学学报》 CSCD 北大核心 2021年第2期247-255,共9页
针对复杂环境下电波传播预测分析难的问题,提出了一种基于地形重构的分步抛物方程(split-step parabolic equation,SSPE)传播预测方法.该方法采用具有广角传播因子且步长可变的双向SSPE解法,并利用基于改进地形重构的SSPE传播预测方法... 针对复杂环境下电波传播预测分析难的问题,提出了一种基于地形重构的分步抛物方程(split-step parabolic equation,SSPE)传播预测方法.该方法采用具有广角传播因子且步长可变的双向SSPE解法,并利用基于改进地形重构的SSPE传播预测方法对真实地形的电波传播特性进行仿真分析和试验验证.与现有的电波传播预测方法相比,该方法结合了真实地形,通过改进重构算法对地形建模效果进行完善,并利用变步长双向SSPE解法进行传播损耗的预测.仿真试验结果表明,此预测方法6 dB以内的精度满足了高精度电波传播模型的要求,表明该方法具有实际意义与推广价值. 展开更多
关键词 地形重构 预测分析方法 变步长双向分步抛物方程(sspe)解法 重构算法
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Role of Routine Benzodiazepin in Eliciting Classical Electroencephalogram (EEG) Response in Suspected Sub-Acute Sclerosing Panencephalitis (SSPE) Cases
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作者 Yamin Shahriar Chowdhury Narayan Chandra Saha +4 位作者 M. Abdullah Yusuf Ariful Islam S. K. Azimul Hoque Rajib Nayan Chowdhury M. Enayet Hussain 《World Journal of Neuroscience》 2017年第1期32-37,共6页
Background: EEG could be normal or atypical in spite of suggestive clinical features and positive measles Ab of SSPE cases which could have typical EEG pattern after Benzodiazepine. Objectives: The purpose of the pres... Background: EEG could be normal or atypical in spite of suggestive clinical features and positive measles Ab of SSPE cases which could have typical EEG pattern after Benzodiazepine. Objectives: The purpose of the present study was to find out the necessity of administration of benzodiazepine during EEG recording of SSPE cases as well as to compare the efficacy of diazepam and midazolam in eliciting EEG pattern. Methodology: This double blind, parallel, single centered, non-randomized clinical trial was conducted in the Department of Pediatric Neurology at National Institute of Neurosciences, Dhaka, Bangladesh from July 2014 to June 2015 for a period of 1 (one) year. All the clinical and investigational suspected cases of sub-acute Sclerosing Panencephalitis (SSPE) children in both sexes were included as study population. Others neurodegenerative diseases including Wilson’s disease were excluded from this study. Patients were divided into two groups named as group A who were given diazepam and the other group B was given midazolam in IV during EEG recording. The clinical outcomes were measured and were recorded in a pre-designed data sheet. Result: The characteristic typical periodic slow wave complex (PSWC) was found only in 8 (30.8%) patients among the 26 (100.0%) before intervention with benzodiazepines. The remaining 18 (69.2%) had non-typical PSWC of which 10 (38.5%) were normal, 3 (11.5%) with atypical PSWC and 5 (19.2%) were with other EEG findings. After intervention with benzodiazepines, 23 (88.5%) had shown typical PSWC and only 3 (11.5%) had non-typical PSWC. Among the typical PSWC cases after intervention, 8 (30.8%) had normal EEG initially, 5 (19.2%) had other EEG finding, 2 (7.7%) had non-typical PSWC and 8 (30.8%) had typical PSWC from the beginning. Of the 3 (11.5%) of the non-typical PSWC of intervention group, 2 (7.7%) had shown no changes in EEG from the beginning and 1 (3.8%) had shown other EEG finding. The difference between before and after intervention was actually statistically extremely significant (p 0.05). Conclusion: The role of benzodiazepine is very obvious in eliciting the typical EEG pattern in SSPE patients which has shown the characteristic PSWC in EEG in most cases. 展开更多
关键词 Sub-Acute SCLEROSING Panencephalitis (sspe) EEG DIAZEPAM Midazolam
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亚急性硬化性全脑炎的临床特点分析 被引量:1
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作者 张凡 李久伟 +3 位作者 石秀玉 王红梅 胡琳燕 邹丽萍 《北京医学》 CAS 2020年第11期1066-1069,1074,共5页
目的总结亚急性硬化性全脑炎(subacute sclerosing panencephalitis,SSPE)患儿的临床病程特点,发现早期诊断线索,增加早期干预机会。方法选取2016年1月1日至2018年12月31日解放军总医院第一医学中心小儿内科和首都医科大学附属北京儿童... 目的总结亚急性硬化性全脑炎(subacute sclerosing panencephalitis,SSPE)患儿的临床病程特点,发现早期诊断线索,增加早期干预机会。方法选取2016年1月1日至2018年12月31日解放军总医院第一医学中心小儿内科和首都医科大学附属北京儿童医院神经内科确诊为SSPE并住院治疗的患儿6例,均随访至2019年12月31日或疾病终点。结果3例学龄期患儿以智力减退或夜间遗尿为Ⅰ期首发症状,其他3例学龄前期患儿无明显Ⅰ期症状。不同治疗方案均未能阻止疾病进展,3例在随访阶段进入了Ⅲ期,其中1例在Ⅲ期因重症肺炎死亡,没有患儿在随访阶段进入Ⅳ期。结论SSPE患儿临床表现多样,治疗困难。当学龄期患儿出现智力减退或遗尿时应注意麻疹感染史。通过对麻疹感染家庭针对性的医学教育可以提高SSPE的早期确诊率,增加早期干预的机会。 展开更多
关键词 亚急性硬化性全脑炎 临床特征 早期诊断 治疗
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一例亚急性硬化性全脑炎患儿的护理 被引量:1
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作者 李翠柳 《护士进修杂志》 北大核心 2010年第11期1019-1021,共3页
关键词 亚急性硬化性全脑炎 患儿 护理
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亚急性硬化性全脑炎研究进展
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作者 侯存军 邵志英 赵晓 《中华实验和临床感染病杂志(电子版)》 CAS 2017年第3期209-212,共4页
亚急性硬化性全脑炎为一种严重的少见疾病,多由婴幼儿麻疹患者发展而来,麻疹疫苗接种会大大降低其发病率;发病与自身免疫系统不完善和病毒变异有关。若麻疹病毒(MV)在脑内不能及时清除,则会对中枢神经系统造成不可逆损伤,表现为智力减... 亚急性硬化性全脑炎为一种严重的少见疾病,多由婴幼儿麻疹患者发展而来,麻疹疫苗接种会大大降低其发病率;发病与自身免疫系统不完善和病毒变异有关。若麻疹病毒(MV)在脑内不能及时清除,则会对中枢神经系统造成不可逆损伤,表现为智力减退、语言障碍和癫痫等,可出现脑电图和影像学异常表现,脑脊液抗-MV升高。治疗以抗病毒、提高免疫力和对症治疗为主,虽然新的治疗方法仍在探索中,但目前尚无满意疗法。 展开更多
关键词 亚急性硬化性全脑炎 麻疹病毒 免疫缺陷 病毒变异
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