检索结果-南通市图书馆

自发性颅内低压并发脑静脉窦血栓形成的血管内治疗:1例报道并文献复习

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国际脑血管病杂志 2024年第3期32卷 237-240页

作者：张真怡于江华张松李伟业赵家华王健闫世浩河北医科大学第二医院神经内科石家庄050000

自发性颅内低压(spontaneous intracranial hypotension,SIH)是一种无特殊诱因,以脑脊液容量低于正常为特征的疾病[1]。研究表明,SIH的发病率约为5/10万,男女性别比约为1∶2,发病高峰期在40岁左右,儿童和老年人也可受累[2]。SIH通常由1... 详细信息

自发性颅内低压(spontaneous intracranial hypotension,SIH)是一种无特殊诱因,以脑脊液容量低于正常为特征的疾病[1]。研究表明,SIH的发病率约为5/10万,男女性别比约为1∶2,发病高峰期在40岁左右,儿童和老年人也可受累[2]。SIH通常由1处或多处硬脊膜漏出脑脊液引起,相关研究证实其与遗传性结缔组织病相关[1]。其临床症状复杂多样,以直立性头痛为典型表现,但也可能伴发蛛网膜下腔出血、硬膜下血肿、脑静脉窦血栓形成(cerebral venous sinus thrombosis,CVST)、脑神经麻痹(如外展神经麻痹引起的复视)等非典型表现,甚至可同时出现多种并发症[3]。普通人群的CVST发生率仅为0.0005%[4],而SIH患者合并CVST的发生率则高达1%~2%[5],患者可出现持续性剧烈头痛、呕吐、癫痫发作以及意识障碍等非特异性症状[6]。既往对二者发生的先后顺序并不明确,近年来随着影像学技术的进步,多项研究已证实SIH先于并导致CVST的发生[7,8,9]。虽然大多数患者转归良好[10],但临床上SIH伴发CVST的患者常因诊断出CVST而被误诊为颅内高压综合征,导致误治,耽误病情[11]。现报道1例接受血管内治疗的SIH并发CVST病例,并探讨此病的诊断和治疗。

关键词：血管内治疗脑静脉窦血栓形成外展神经麻痹硬膜下血肿剧烈头痛意识障碍男女性别比脑神经麻痹

FRCR资格考试解剖模块对我国放射科住院医师规范化培训影像解剖教学的启示

在线全文

学校读者我要写书评

暂无评论

中国毕业后医学教育 2022年第4期6卷 326-329页

作者：彭娴婧张振怡段莹星龙学颖廖伟华杨帅中南大学湘雅医院放射科湖南长沙410008

目的借鉴英国皇家放射医师学会会员(Fellowship of the Royal College of Radiologists,FRCR)资格考试解剖模块的形式与内容,初步探讨如何从多方面训练放射科住院医师形成正确的影像解剖思维。方法以FRCR资格考试第一轮解剖部分及相应... 详细信息

目的借鉴英国皇家放射医师学会会员(Fellowship of the Royal College of Radiologists,FRCR)资格考试解剖模块的形式与内容,初步探讨如何从多方面训练放射科住院医师形成正确的影像解剖思维。方法以FRCR资格考试第一轮解剖部分及相应考试复习材料为范本,从题目设计、涵盖内容、考核重点三个方面总结放射科住院医师规范化培训(简称住培)的影像解剖教学中应重视的关键点和侧重方面。结果FRCR资格考试解剖部分的内容为影像解剖教学内容和教学方法提供了诸多启示与经验,包括提高对日常容易忽视的教学内容的重视,重视利用后处理技术及网络贮存与传输系统进行影像解剖教学。结论FRCR资格考试解剖模块为优化放射科住培影像解剖教学的内容与教学方法提供了思路,有利于培养住院医师在培训早期形成正确的影像解剖思维。

关键词：住院医师规范化培训放射科住院医师影像解剖教学

聚乙烯电线电缆专用高效复合抗氧剂配方设计及应用研究

在线全文

学校读者我要写书评

暂无评论

塑料助剂 2021年第4期 15-18页

作者：付建英张忠东赵伟李鑫张珍一于方波郑兴邦李雪冰山东省临沂市三丰化工有限公司临沂276034 山东省临沂市河东区人力资源和社会保障局临沂276034

研究分析了聚乙烯电线电缆专用料的物化性质、产品质量指标要求等特性,设计了一系列聚乙烯电线电缆专用高效复合抗氧剂配方,并对其进行了应用效果研究,获得了突出的应用效果,其中B配方已经在多个电线电缆专用料生产厂家批量供货,所生产... 详细信息

研究分析了聚乙烯电线电缆专用料的物化性质、产品质量指标要求等特性,设计了一系列聚乙烯电线电缆专用高效复合抗氧剂配方,并对其进行了应用效果研究,获得了突出的应用效果,其中B配方已经在多个电线电缆专用料生产厂家批量供货,所生产的聚乙烯电线电缆料产品各项指标优良,加工客户普遍反馈解决了长期以来常规抗氧剂抗氧化性能不足、添加量大、析出严重等难题。

关键词：聚乙烯电线电缆专用料专用高效复合抗氧剂

Confusing Object Detection:A Survey

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第9期80卷 3421-3461页

作者： Kunkun Tong Guchu Zou Xin Tan Jingyu Gong zhenyi Qi Zhizhong zhang Yuan Xie Lizhuang Ma School of Computer Science and Technology East China Normal UniversityShanghai200062China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai200050China

Confusing object detection(COD),such as glass,mirrors,and camouflaged objects,represents a burgeoning visual detection task centered on pinpointing and distinguishing concealed targets within intricate backgrounds,leveraging deep learning *** garnering increasing attention in computer vision,the focus of most existing works leans toward formulating task-specific solutions rather than delving into in-depth analyses of methodological *** of now,there is a notable absence of a comprehensive systematic review that focuses on recently proposed deep learning-based models for these specific *** fill this gap,our study presents a pioneering review that covers both themodels and the publicly available benchmark datasets,while also identifying potential directions for future research in this *** current dataset primarily focuses on single confusing object detection at the image level,with some studies extending to video-level *** conduct an in-depth analysis of deep learning architectures,revealing that the current state-of-the-art(SOTA)COD methods demonstrate promising performance in single object *** also compile and provide detailed descriptions ofwidely used datasets relevant to these detection *** endeavor extends to discussing the limitations observed in current methodologies,alongside proposed solutions aimed at enhancing detection ***,we deliberate on relevant applications and outline future research trajectories,aiming to catalyze advancements in the field of glass,mirror,and camouflaged object detection.

关键词： Confusing object detection mirror detection glass detection camouflaged object detection deep learning

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高温状态下ZSM-5分子筛的结构

燃料化学学报 1985年第2期 106-113页

作者：刘振义张婉静林炳雄于勤魏国祥朱伟北京大学化学系南京炼油厂研究所南京炼油厂研究所北京南京

用多晶X-射线衍射法研究丁在500℃高温状态下水蒸汽处理后的ZSM-5结构。发现高温下晶体的对称性由常温状态下的C2h5—P21/n变为C2v9—P21/n,但结构的形貌未变,尤其是三个与择形性能相关的结构参数,即两个通道的开口形状和大小及“Z”字... 详细信息

用多晶X-射线衍射法研究丁在500℃高温状态下水蒸汽处理后的ZSM-5结构。发现高温下晶体的对称性由常温状态下的C2h5—P21/n变为C2v9—P21/n,但结构的形貌未变,尤其是三个与择形性能相关的结构参数,即两个通道的开口形状和大小及“Z”字形通道的折角,高温状态下的也与常温时的基本一致。因此,不存在国外一些文献所报导的、孔道的动力学半径随温度升高可增大约1A的现象。就ZSM-5本身的结构而言,不论在高温和常温状态时,对不同形状的分子进入孔道的空间阻碍效应或“势垒”是一样的,即不受制度影响。而择形性能随温度上升而下降,是由于异构烷烃分子随温度升高活化分子增多,以致能克服空间阻碍效应,进入孔道的分子数目增加。当样品从500℃冷至室温时,晶体的对称性又恢复为C2h5—P21/n。

关键词： ZSM-5 水蒸汽处理分子筛合成泡沸石

Simulating androgen receptor selection in designer yeast

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Synthetic and Systems Biotechnology 2022年第4期7卷 1108-1116页

作者： Haoran zhang Lu zhang Yipeng Xu Shaoyong Chen zhenyi Ma Mingdong Yao Fangyin Li Bo Li Yingjin Yuan Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(Ministry of Education) Tianjin UniversityTianjin300072PR China School of Chemical Engineering and Technology Tianjin UniversityTianjin300072PR China Department of Urology The Cancer Hospital of the University of Chinese Academy of Sciences(Zhejiang Cancer Hospital)HangzhouChina Hematology-Oncology Division Department of MedicineBeth Israel Deaconess Medical Center and Harvard Medical SchoolBostonMA02215USA School of Basic Medical Sciences Tianjin Medical UniversityTianjin300070PR China

Androgen receptor(AR)mutation is closely associated with prostate cancer(PCa)and is one of the mechanisms of resistance to PCa therapies such as AR *** sequencing technologies like next-generation sequencing(NGS)contributes to the high-throughput and precise detection of AR mutations carried by PCa patients,the lack of interpretations of these clinical genetic variants has still been a roadblock for PCa-targeted precision ***,we established a designer yeast reporter assay to simulate natural androgen receptor(AR)selection using AR *** HIS3 gene transactivation was associated with the ligand-induced recruitment of steroid receptor coactivator-1(SRC-1)by AR mutants,where yeast growth in histidine-free medium was determined as the *** assay is applicable to determine a wide range of clinical AR mutants including those with loss of function relating to androgen insensitivity syndrome(AIS),and those associated with PCa conferring resistance to AR antagonists such as enzalutamide(ENZ),bicalutamide(BIC),and cyproterone acetate(CPA).One clinical AR mutant previously reported to confer ENZ-resistance,F877L,was found to confer partial resistance to CPA as well using designer *** simple and efficient assay can enable precise one-pot screening of AR mutants,providing a reference for tailored medicine.

关键词： Androgen receptor mutations Androgen receptor antagonists Prostate cancer Saccharomyces cerevisiae

Vertical Distribution Characteristics of PM2.5 Observed by a Mobile Vehicle Lidar in Tianjin, China in 2016

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Meteorological Research 2018年第1期32卷 60-68页

作者： Lihui LYU Yunsheng DONG Tianshu zhang Cheng LIU Wenqing LIU Zhouqing XIE Yan XIANG Yi zhang zhenyi CHEN Guangqiang FAN Leibo zhang Yang LIU Yuchen SHI Xiaowen SHU Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Hefei 230031 University of Science and Technology of China Hefei 230026 Tianjin Academy of Environmental Sciences Tianjin 300191 Chinese Academy of Sciences Wuxi Photonics Co. Ltd. Wuxi 214135 The AirForce Military Representative's Office in Beijing Beijing 100086

We present mobile vehicle lidar observations in Tianjin, China during the spring, summer, and winter of 2016. Mobile observations were carried out along the city border road of Tianjin to obtain the vertical distribution characteristics of PM2.5. Hygroscopic growth was not considered since relative humidity was less than 60% during the observation experiments. PM2.5 profile was obtained with the linear regression equation between the particle extinction coefficient and PM2.5 mass concentration. In spring, the vertical distribution of PM2.5 exhibited a hierarchical structure. In addition to a layer of particles that gathered near the ground, a portion of particles floated at 0.6–2.5-km height. In summer and winter, the fine particles basically gathered below 1 km near the ground. In spring and summer, the concentration of fine particles in the south was higher than that in the north because of the influence of south wind. In winter, the distribution of fine particles was opposite to that measured during spring and summer. High concentrations of PM2.5 were observed in the rural areas of North Tianjin with a maximum of 350 μg m^–3 on 13 December2016. It is shown that industrial and ship emissions in spring and summer and coal combustion in winter were the major sources of fine particles that polluted Tianjin. The results provide insights into the mechanisms of haze formation and the effects of meteorological conditions during haze–fog pollution episodes in the Tianjin area.

关键词： mobile vehicle lidar vertical concentration profile fine particle

Perpendicular magnetization switching by large spin-orbit torques from sputtered Bi2Te3

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第7期29卷 215-220页

作者： zhenyi Zheng Yue zhang Daoqian Zhu Kun zhang Xueqiang Feng Yu He Lei Chen Zhizhong zhang Dijun Liu Youguang zhang Pedram Khalili Amiri Weisheng Zhao Fert Beijing Research Institute BDBCSchool of MicroelectronicsBeihang UniversityBeijing 100191China School of Electronics and Information Engineering Beihang UniversityBeijing 100191China Department of Electrical and Computer Engineering Northwestern UniversityEvanstonIllinois 60208USA

Spin-orbit torque(SOT)effect is considered as an efficient way to switch the magnetization and can inspire various high-performance spintronic ***,topological insulators(TIs)have gained extensive attention,as they are demonstrated to maintain a large effective spin Hall angle(θeff SH),even at room ***,molecular beam epitaxy(MBE),as a precise deposition method,is required to guarantee favorable surface states of TIs,which hinders the prospect of TIs towards industrial *** this paper,we demonstrate that Bi2Te3 films grown by magnetron sputtering can provide a notable SOT effect in the heterostructure with perpendicular magnetic anisotropy CoTb ferrimagnetic *** harmonic Hall measurement,a high SOT efficiency(8.7±0.9 Oe/(10^9 A/m^2))and a largeθ^eff SH(3.3±0.3)are obtained at room ***,we also observe an ultra-low critical switching current density(9.7×10^9 A/m^2).Moreover,the low-power characteristic of the sputtered Bi2Te3 film is investigated by drawing a comparison with different sputtered SOT *** work may provide an alternative to leverage chalcogenides as a realistic and efficient SOT source in future spintronic devices.

关键词： spin-orbit torque sputtered topological insulator ferrimagnet magnetization switching

GDSL esterase/lipases OsGELP34 and OsGELP110/OsGELP115 are essential for rice pollen development

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2020年第10期62卷 1574-1593页

作者： Huihui zhang Menglong Wang Yiqi Li Wei Yan zhenyi Chang Haoling Ni Zhufeng Chen Jianxin Wu Chunjue Xu Xing Wang Deng Xiaoyan Tang Guangdong Provincial Key Laboratory of Biotechnology for Plant Development School of Life SciencesSouth China Normal UniversityGuangzhou 510631China Shenzhen Institute of Molecular Crop Design Shenzhen 518107China School of Life Sciences Capital Normal UniversityBeijing 100048China School of Life Sciences Southern University of Science and TechnologyShenzhen 518055China

Pollen exine contains complex biopolymers of aliphatic lipids and *** development of pollen exine often leads to plant *** mechanisms regulating exine formation have been studied extensively but remain *** we report the analyses of three GDSL esterase/lipase protein genes,OsGELP34,OsGELP110,and OsGELP115,for rice exine ***34 was identified by cloning of a male sterile mutant ***34 encodes an endoplasmic reticulum protein and was mainly expressed in anthers during pollen exine ***34 mutant displayed abnormal exine and altered expression of a number of key genes required for pollen ***110 was previously identified as a gene differentially expressed in meiotic ***110 was most homologous to OsGELP115,and the two genes showed similar gene expression *** OsGELP110 and OsGELP115 proteins were localized in *** knockout of OsGELP110 and OsGELP115 did not affect the plant fertility,but double knockout of both genes altered the exine structure and rendered the plant male ***34 is distant from OsGELP110 and OsGELP115 in sequence,and osgelp34 and osgelp110/osgelp115 mutants were different in anther morphology despite both were male *** results suggested that OsGELP34 and OsGELP110/OsGELP115 catalyze different compounds for pollen exine development.

关键词： development. sterile render