检索结果-南通市图书馆

基于自研ASIC芯片HEPS中硅微条探测器读出电子学原型系统设计与测试

在线全文

学校读者我要写书评

暂无评论

核电子学与探测技术 2024年第1期44卷 51-60页

作者：杨宗信李航旭胡创业周杨帆陈一鸣郑波南华大学核科学与技术学院衡阳421001 先进核能技术设计与安全教育部重点实验室衡阳421001 中国科学院高能物理研究所北京100049

时间分辨X射线粉末衍射技术是探测物质晶体结构及其演变的重要手段。单光子计数型硅微条探测器因其灵敏度高和死时间低,在高能同步辐射光源(HEPS)的X射线粉末衍射实验中发挥着重要作用。研制适用于单光子计数型一维硅微条探测器的专用A... 详细信息

时间分辨X射线粉末衍射技术是探测物质晶体结构及其演变的重要手段。单光子计数型硅微条探测器因其灵敏度高和死时间低,在高能同步辐射光源(HEPS)的X射线粉末衍射实验中发挥着重要作用。研制适用于单光子计数型一维硅微条探测器的专用ASIC读出芯片(SSDROC)及其读出电子学系统,并采用一种新标定方法解决了SSDROC各通道对同一输入输出响应不一致的问题,该方法可显著提高各通道数据一致性并减小衍射实验数据的统计误差。探测器完成各项性能测试,结果表明整体系统线性优秀、能量分辨能力强、噪声低以及计数率高,为将来大覆盖角度一维硅微条探测器系统研制奠定坚实基础。

关键词：单光子计数硅微条探测器 ASIC芯片读出电子学二次阈值标定

在线全文

学校读者我要写书评

暂无评论

一类Nehari函数的偏差性质

数学年刊（A辑） 2007年第6期28卷 781-790页

作者：杨宗信江西师范大学数学与信息科学学院南昌330022

研究了一族由Pokornyi单叶性判据所确定的Nehari函数的偏差性质,得到了这类函数的导数增长和球面度量偏差,并研究了与John区域有着密切的关系的一个函数的特征.

关键词：单叶函数 Schwarz导数 Nehari函数族偏差性质

SOME RESULTS OF A NEHARI FAMILY

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2005年第1期26卷 57-66页

作者： ZHUHUACHENG yangzongxin CHENJIXIU InstituteofMathematics LaboratoryofMathematicsforNonlinearSciencesFudanUniversityShanghai200433China InstituteofMathematics，LaboratoryofMathematicsforNonlinearSciences，FudanUniversity Shanghai200433China

The authors study the Nehari family Nb and obtain some important properties for this family.

关键词： Schwarzian derivative Nehari family

Clinical significance of inflammatory cytokine and chemokine expression in hand foot and mouth disease

在线全文

学校读者我要写书评

暂无评论

Clinical significance of inflammatory cytokine and chemokine...

浙江省免疫学会第十次学术大会

作者： Ping Shao Xiaoxin Wu Hongbo Li Zhigang Wu zongxin yang Hangping Yao Department of Infectious Diseases First Affiliated HospitalZhejiang University School of Medicine State Key Laboratory for Diagnosis and Treatment of Infectious Diseases Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases First Affiliated HospitalZhejiang University School of Medicine Hangzhou Sixth People's Hospital

Purpose:To determine the relationship of cytokine/chemokine expression with the clinical presentation of hand,foot and mouth disease(HFMD).Methods:This study involved 28 mild HFMD patients,44 severe HFMD patients and26 healthy *** blood was tested for cytokines(IL-4,IL-12,IL-18,TNF-α,IFN-γ) and chemokines(IL-8,RANTES,MCP-1,IP-10).Stool samples from the patients were tested for EV71 nucleic acid using reverse transcription polymerase chain ***:All cytokine/chemokine levels were higher in severe HFMD patients than in mild HFMD patients or controls(P < 0.01).RANTES,MCP-1,IL-4,IL-12 and IL-18 levels were higher in mild HFMD patients than in the controls(P < 0.05).In severe HFMD,all levels(except IL-8 and IL-4) were higher in patients with encephalitis plus pulmonary edema than in those with encephalitis alone(P < 0.05).All levels(except IL-8) were higher in EV71-positive patients than in EV71-negative patients(P < 0.05).In mild HFMD,all levels(except IL-8 and IL-4) were higher in EV71-positive patients than in EV71-negative patients(P < 0.05).In severe HFMD,only RANTES,IP-10 and IFN-γ levels were higher in EV71-positive patients than in EV71-negative patients(P < 0.05).In the EV71-negative group,all levels were higher in severe HFMD than in mild HFMD(P < 0.01).In the EV71-positive group,all levels(except IL-8) were higher in severe HFMD than in mild HFMD(P< 0.01).Conclusion:Cytokines/chemokines participate in HFMD pathogenesis,and may be useful to monitor disease progression and predict prognosis.

关键词： Hand foot and mouth disease enterovirus 71 inflammatory cytokines chemokines

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

John区域的等价条件

数学年刊（A辑） 2008年第6期29卷 873-878页

作者：黄春红杨宗信扛西师范大学数学与信息科学学院南昌330022

讨论了单位圆盘D内的局部单叶的解析函数f在其Schwarz导数满足条件|Sf(z)|≤2α[1+ (1-α)|z|~2](1-|z|~2)^(-2)(1≤α≤2)时的映射性质,得到了f(D)为John区域的两个等价命题,并给出了f(D)为John区域的一个必要条件.

关键词： John区域 Schwarz导数共形映射

一种可光聚合的氧杂环丁烷基硅烷偶联剂的合成与性能研究

在线全文

学校读者我要写书评

暂无评论

北京化工大学学报（自然科学版） 2020年第2期47卷 17-23页

作者：杨宗鑫马浩钦孙芳北京化工大学化学学院北京100029

以3-羟甲基-3-乙基-氧杂环丁烷、烯丙基溴和三乙氧基硅烷为主要原料合成了一种氧杂环丁烷基硅烷偶联剂,即三乙氧基-(3-乙基-3-丙基甲氧基氧杂环丁烷)硅烷(ETPO),研究了ETPO的光聚合活性及其对3,4-环氧环己基甲基3,4-环氧环己基甲酸酯(E4... 详细信息

以3-羟甲基-3-乙基-氧杂环丁烷、烯丙基溴和三乙氧基硅烷为主要原料合成了一种氧杂环丁烷基硅烷偶联剂,即三乙氧基-(3-乙基-3-丙基甲氧基氧杂环丁烷)硅烷(ETPO),研究了ETPO的光聚合活性及其对3,4-环氧环己基甲基3,4-环氧环己基甲酸酯(E4221)环氧阳离子光聚合体系的光聚合动力学,光固化膜的拉伸性能、表面性能及附着力的影响。结果表明,ETPO可以促进E4221体系光聚合转化率的提高,改善固化膜的拉伸性能、附着力和表面拒水性;含有ETPO的E4221固化膜的拉伸强度可达到15.9 MPa,断裂伸长率达到21.4%,在PVC上的附着力最高可为5B,最大表面水接触角为85.3°。

关键词：光聚合硅烷偶联剂氧杂环丁烷

在线全文

学校读者我要写书评

暂无评论

平面区域的对数导数单叶性内径

中山大学学报（自然科学版） 2017年第2期56卷 53-56页

作者：刘浔冰刘雅萍杨宗信江西师范大学数学与信息科学学院江西南昌330022

研究了对数导数意义下平面区域的单叶性内径,讨论了对数导数意义下单叶性内径的相关性质,得到了角域的对数导数单叶性内径的上界估计。

关键词：对数导数单叶性内径万有Teichmüller空间

Vibration properties of Paulownia wood for Ruan sound quality using machine learning methods

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2024年第5期35卷 216-222页

作者： yang yang College of Art and Design Harbin UniversityHarbin 150076People’s Republic of China College of Mechanical and Electrical Engineering Northeast Forestry UniversityHarbin 150040People’s Republic of China

As an important material for manufacturing resonant components of musical instruments,Paulownia has an important influence on the sound quality of *** this paper,a model for evaluating the sound quality of Ruan based on the vibration characteristics of wood is developed using machine learning ***,the selection of materials for Ruan manufacturing relies primarily on manually weighing,observing,striking,and listening by the instrument *** in scientific theory have hindered the quality of the finished *** this study,nine Ruans were manufactured,and a prediction model of Ruan sound quality was proposed based on the raw material information of *** of a total of 180 data sets,145 and 45 sets were chosen for training and validation,*** this paper,typical correlation analysis was used to determine the correlation between two single indicators in two adjacent pairwise combinations of the measured objects in each stage of the production process in *** vibra-tion characteristics of the wood were tested,and a model for predicting the evaluation of Ruan’s acoustic qualities was developed by measuring the vibration characteristics of the resonating plate *** acoustic quality of the Ruan sound board wood was evaluated and predicted using machine learning model generalized regression neural *** results show that the prediction of Ruan sound quality can be achieved using Matlab simulation based on the vibration characteristics of the soundboard *** the model-predicted values were compared with the tradi-tional predicted results,it was found that the generalized regression neural network had good performance,achieving an accuracy of 93.8%which was highly consistent with the experimental *** was concluded that the model can accurately predict the acoustic quality of the Ruan based on the vibration performance of the soundboards.

关键词： Sound quality Wood vibration performance Paulownia wood Machine learning methods

在线全文

学校读者我要写书评

暂无评论

新冠疫情前后机场加权网络抗毁性分析

中国安全科学学报 2022年第8期32卷 91-97页

作者：郭九霞杨宗鑫夏正洪唐卫贞中国民用航空飞行学院空中交通管理学院四川广汉618307

为提升机场网络应对突发事件的能力,基于复杂网络,分析新冠疫情(COVID-19)前后我国机场网络的拓扑特性;利用节点强度加权处理机场网络,识别不同攻击策略下加权网络特征指标损失拟合曲线拐点,提出网络抗毁性评估方法。结果表明:疫情前后... 详细信息

为提升机场网络应对突发事件的能力,基于复杂网络,分析新冠疫情(COVID-19)前后我国机场网络的拓扑特性;利用节点强度加权处理机场网络,识别不同攻击策略下加权网络特征指标损失拟合曲线拐点,提出网络抗毁性评估方法。结果表明:疫情前后机场加权网络拓扑结构未发生明显变化,但连通程度略显稀疏;我国机场网络在不同蓄意攻击策略下抗毁性较差,当攻击比例达8.6%时,出现损失拟合曲线拐点,全局网络效率相对损失达24.39%,最大联通子图缩减率达14.67%,平均度相对损失达76.87%,平均聚类系数相对损失达68.84%;拐点之后,网络效率、最大联通子图缩减损失均加快,网络处于瘫痪状态。

关键词：新冠疫情(COVID-19) 机场加权网络抗毁性损失曲线拐点