检索结果-南通市图书馆

量子无标度网络在随机攻击与蓄意故障下的纠缠渗流

在线全文

学校读者我要写书评

暂无评论

量子电子学报 2017年第5期34卷 596-602页

作者：王语晗马雷华东师范大学物理与材料学院上海200241

通过在节点间建立成对纠缠态,构造了一个量子无标度网络.通过局域化纠缠交换的方式对网络中的节点进行随机攻击以及等概率地使网络中的节点发生蓄意故障,对比其纠缠渗流阈值变化。结果表明随机攻击下的阈值明显变小,蓄意故障下的阈值明... 详细信息

通过在节点间建立成对纠缠态,构造了一个量子无标度网络.通过局域化纠缠交换的方式对网络中的节点进行随机攻击以及等概率地使网络中的节点发生蓄意故障,对比其纠缠渗流阈值变化。结果表明随机攻击下的阈值明显变小,蓄意故障下的阈值明显增大,体现了量子无标度网络的鲁棒性与脆弱性;纠缠浓缩下的量子无标度网络在随机攻击与蓄意故障下仍具有鲁棒性与脆弱性,但较纠缠浓缩前的鲁棒性变弱,说明真实网络具有较好的鲁棒性。

关键词：量子信息量子无标度网络纠缠渗流鲁棒性脆弱性纠缠浓缩

在线全文

学校读者我要写书评

暂无评论

特发性颅压增高的治疗现状

中华眼科杂志 2016年第12期52卷 948-951页

作者：汪宇涵马瑾钟勇中国医学科学院北京协和医学院北京协和医院眼科 100730

特发性颅压增高（IIH）属于一种弥散性脑肿胀病变，病因多为颅内静脉循环障碍。临床上表现为颅压增高、头痛、视乳头水肿。由于IIH通常导致严重的视功能损伤，故IIH的早期诊断和治疗尤为重要。本文针对近年来有关IIH的药物治疗、减轻体... 详细信息

特发性颅压增高（IIH）属于一种弥散性脑肿胀病变，病因多为颅内静脉循环障碍。临床上表现为颅压增高、头痛、视乳头水肿。由于IIH通常导致严重的视功能损伤，故IIH的早期诊断和治疗尤为重要。本文针对近年来有关IIH的药物治疗、减轻体重治疗、手术治疗、介入治疗及支持治疗等方面的临床研究进展进行综述，以期为临床工作提供参考。

关键词：假脑瘤治疗颅内高压

Genetic and biological properties of H9N2 avian influenza viruses isolated in central China from2020 to 2022

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第8期23卷 2778-2791页

作者： Libin Liang Yaning Bai Wenyan Huang Pengfei Ren Xing Li Dou Wang yuhan Yang Zhen Gao Jiao Tang Xingchen Wu Shimin Gao Yanna Guo Mingming Hu Zhiwei Wang Zhongbing Wang Haili ma Junping Li College of Veterinary Medicine Shanxi Agricultural UniversityJinzhong 030801China Shanxi Provincial Animal Disease Prevention and Control Center Taiyuan 030000China

The H9N2 subtype of avian influenza virus(AIV)is widely prevalent in poultry and wild birds globally,and has become the predominant subtype circulating in poultry in *** H9N2 AIV can directly or indirectly(by serving as a"donor virus")infect humans,posing a significant threat to public ***,there is a lack of in-depth research on the prevalence of H9N2 viruses in Shanxi Province,central *** this study,we isolated 14 H9N2 AIVs from October 2020 to April 2022 in Shanxi Province,and genetic analysis revealed that these viruses belonged to 7 different *** study on animals revealed that the H9N2 strains we identified displayed high transmission efficiency among chicken populations,and exhibited diverse replication abilities within these *** viruses could replicate efficiently in the lungs of mice,with one strain also demonstrating the capacity to reproduce in organs like the brain and *** the cellular level,the replication ability of different H9N2 strains was evaluated using plaque formation assays and multi-step growth curve assays,revealing significant differences in the replication and proliferation efficiency of the various H9N2 viruses at the cellular *** antigenicity analysis suggested that these isolates could be classified into 2 separate antigenic *** research provides crucial data to help understand the prevalence and biological characteristics of H9N2 AIVs in central *** also highlights the necessity of enhancing the surveillance of H9N2 AIVs.

关键词： avian influenza virus H9N2 central China pathogenicity antigenicity

在线全文

学校读者我要写书评

暂无评论

接闪器对旋转风机引雷能力影响的试验研究

高电压技术 2017年第5期43卷 1628-1634页

作者：屈路文习山王羽姒天军马宇晗蓝磊武汉大学电气工程学院武汉430072

为研究接闪器对旋转风机引雷能力的影响机理,设计了典型2 MW容量风机的1:30微缩模型,考虑了叶尖部分2种典型接闪器类型,利用波形参数为-250/2 500μs的负极性操作冲击波开展了旋转风机模型的接闪放电试验。试验采用升降法获取了各工况... 详细信息

为研究接闪器对旋转风机引雷能力的影响机理,设计了典型2 MW容量风机的1:30微缩模型,考虑了叶尖部分2种典型接闪器类型,利用波形参数为-250/2 500μs的负极性操作冲击波开展了旋转风机模型的接闪放电试验。试验采用升降法获取了各工况条件下的50%放电电压,并进行了放电过程观测。试验结果表明:在长度为1 m的间隙条件下,间隙的击穿电压随着叶片转速的升高而提升,最多提升4.07%;同时,随着接闪器曲率半径的增大,间隙击穿电压降低,迎面流注的连接位置更加接近高压电极,风机的引雷能力也增强,叶片转动对风机引雷能力的影响程度减小。分析认为,接闪器的曲率半径和叶片的转动改变了叶尖区域的电荷分布,对叶尖接闪器流注的产生和发展产生影响,从而改变了风机的引雷能力。试验结果为风电机组的接闪器设计提供了参考借鉴。

关键词：风电机组接闪器旋转升降法缩比试验引雷能力

Genetic and pathogenic characterization of new infectious bronchitis virus strains in the GVI-1 and GI-19 lineages isolated in central China

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第7期23卷 2407-2420页

作者： yuhan Yang Dou Wang Yaning Bai Wenyan Huang Shimin Gao Xingchen Wu Ying Wang Jianle Ren Jinxin He Lin Jin Mingming Hu Zhiwei Wang Zhongbing Wang Haili ma Junping Li Libin Liang College of Veterinary Medicine Shanxi Agricultural UniversityJinzhong 030801China Shanxi Provincial Animal Disease Prevention and Control Center Taiyuan 030000China

Avian infectious bronchitis(IB)is a highly contagious infectious disease caused by infectious bronchitis virus(IBV),which is prevalent in many countries worldwide and causes serious harm to the poultry *** present,many commercial IBV vaccines have been used for the prevention and control of IB;however,IB outbreaks occur *** this study,two new strains of IBV,SX/2106 and SX/2204,were isolated from two flocks which were immunized with IBV H120 vaccine in central *** and recombination analysis indicated that SX/2106,which was clustered into the GI-19 lineage,may be derived from recombination events of the GI-19 and GI-7 strains and the LDT3-A *** analysis showed that SX/2204 belongs to the GVI-1 lineage,which may have originated from the recombination of the GI-13 and GVI-1 strains and the H120 *** virus cross-neutralization test showed that the antigenicity of SX/2106 and SX/2204 was different from *** experiments found that both SX/2106 and SX/2204 could replicate effectively in the lungs and kidneys of chickens and cause disease and death,and H120 immunization could not provide effective protection against the two IBV *** is noteworthy that the pathogenicity of SX/2204 has significantly increased compared to the GVI-1 strains isolated previously,with a mortality rate up to 60%.Considering the continuous mutation and recombination of the IBV genome to produce new variant strains,it is important to continuously monitor epidemic strains and develop new vaccines for the prevention and control of IBV epidemics.

关键词： infectious bronchitis virus GI-19 lineage GVI-1 lineage complete genome recombination pathogenicity

在线全文

学校读者我要写书评

暂无评论

EB病毒相关淋巴细胞增殖性疾病诊疗进展

白血病．淋巴瘤 2020年第3期29卷 141-145页

作者：周航马瑜晗桑威徐州医科大学血液病研究所徐州医科大学附属医院细胞研究和转化医学中心徐州医科大学附属医院血液科221000

EB病毒(EBV)是一种潜在的致瘤病毒,约95%的健康人感染并终生携带该病毒。EBV可以诱导宿主细胞克隆转化,约2%的肿瘤和EBV感染相关。近年来围绕EBV诱导淋巴细胞克隆转化、EBV相关淋巴细胞增殖性疾病的诊断和治疗均取得了一定的进展。

关键词：疱疹病毒4型,人淋巴瘤转化免疫治疗细胞治疗

Elasticity meets topology

在线全文

学校读者我要写书评

暂无评论

National Science Review 2024年第6期11卷 84-85页

作者： Guancong ma Department of Physics Hong Kong Baptist University

We are surrounded by environments and items that are made from solid materials in our daily life. Any physical contact with any items is a mechanical disturbance that produces mechanical *** underlines the crucial role that such vibrations play in our daily interactions,highlighting the need for a deeper understanding and improved manipulation of these fundamental phenomena.

关键词：

北京市知晓电子烟中小学生电子烟使用及影响因素分析

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中国学校卫生 2021年第12期42卷 1807-1811,1815页

作者：秦冉郭欣符筠马瑀涵北京市疾病预防控制中心学校卫生所/北京市预防医学研究中心学校卫生所 100013 首都医科大学公共卫生学院

目的了解和掌握北京市中小学生电子烟使用的现状及其有关因素,为促进学校无烟环境建设提供实证依据。方法2019年4—6月采用与规模大小成比例的概率抽样(PPS)方法在北京市范围内分别抽取小学、初中、高中和职高监测点校,各点校随机抽取班... 详细信息

目的了解和掌握北京市中小学生电子烟使用的现状及其有关因素,为促进学校无烟环境建设提供实证依据。方法2019年4—6月采用与规模大小成比例的概率抽样(PPS)方法在北京市范围内分别抽取小学、初中、高中和职高监测点校,各点校随机抽取班级,直至满足样本量,共18312名知晓电子烟的中小学生纳入统计分析,监测内容主要是电子烟使用的现状及影响因素等情况。结果在知晓电子烟的中小学生中,女生较男生使用电子烟的可能性低(OR=0.47,95%CI=0.42~0.54)。进入初二后,使用电子烟的可能性呈递增趋势。父母均不吸烟与孩子远离电子烟呈负相关(OR=0.78,95%CI=0.69~0.88)。平均每天零花钱30~<150元和≥150元的中小学生使用电子烟的可能性分别是0~<10元零花钱的1.43倍(95%CI=1.22~1.67)和2.24倍(95%CI=1.79~2.79)。没有尝试使用卷烟的中小学生使用电子烟的可能性低于已尝试卷烟的(OR=0.16,95%CI=0.14~0.19)。结论应遏制电子烟在中小学生中的流行趋势,填补或纠正儿童青少年对于电子烟认知的空白或错误,采取更具创新性的方法科学引导儿童青少年远离电子烟。

关键词：烟草健康教育认知回归分析学生

Effects of conductive agent type on lithium extraction from salt lake brine with LiFePO_(4) electrodes

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and materials 2024年第4期31卷 678-687页

作者： Zhen Zhang Pan Luo Yan Zhang yuhan Wang Li Liao Bo Yu Mingshan Wang Junchen Chen Bingshu Guo Xing Li School of New Energy and materials Southwest Petroleum UniversityChengdu 610500China Energy Storage Research Institute Southwest Petroleum UniversityChengdu 610500China

Electrochemical lithium extraction from salt lakes is an effective strategy for obtaining lithium at a low ***,the elevated Mg:Li ratio and the presence of numerous coexisting ions in salt lake brines give rise to challenges,such as prolonged lithium extraction periods,diminished lithium extraction efficiency,and considerable environmental *** this work,Li FePO4(LFP)served as the electrode material for electrochemical lithium *** conductive network in the LFP electrode was optimized by adjusting the type of conductive *** approach resulted in high lithium extraction efficiency and extended cycle *** the single conductive agent of acetylene black(AB)or multiwalled carbon nanotubes(MWCNTs)was replaced with the mixed conductive agent of AB/MWCNTs,the average diffusion coefficient of Li+in the electrode increased from 2.35×10^(-9)or 1.77×10^(-9)to 4.21×10^(-9)cm^(2)·s^(-1).At the current density of 20 ma·g^(-1),the average lithium extraction capacity per gram of LFP electrode increased from 30.36 mg with the single conductive agent(AB)to 35.62 mg with the mixed conductive agent(AB/MWCNTs).When the mixed conductive agent was used,the capacity retention of the electrode after 30 cycles reached 82.9%,which was considerably higher than the capacity retention of 65.8%obtained when the single AB was ***,the electrode with mixed conductive agent of AB/MWCNTs provided good cycling *** the conductive agent content decreased or the loading capacity increased,the electrode containing the mixed conductive agent continued to show excellent electrochemical ***,a self-designed,highly efficient,continuous lithium extraction device was *** electrode utilizing the AB/MWCNT mixed conductive agent maintained excellent adsorption capacity and cycling performance in this *** work provides a new perspective for the electrochemical extraction of lithium using LFP electrodes.

关键词： salt lake brine lithium extraction electrochemical lithium extraction conductive agent extraction efficiency adsorption capacity