Results 1 to 10 of about 5,659 (119)
Se pu = Chinese journal of chromatography, 2023 槐糖脂具有良好的抗菌、抗病毒等生物学活性以及温和、低毒、环境友好的特点,是目前最具有市场前景的生物表面活性剂之一。但其组成成分复杂,尚缺乏有效的质量评价方法。针对槐糖脂无紫外吸收的特点,该研究选择了灵敏度高、重现性好、适用于无紫外吸收或弱紫外吸收物质检测的电雾式检测器(CAD),建立了槐糖脂的超高效液相色谱(UHPLC)指纹图谱。槐糖脂样品采用80%乙醇水溶液为提取溶剂,在液固比10∶1(mL/g)条件下超声提取10 min,利用Thermo Fisher Scientific Hypersil ...
Qi Cao +6 more
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智能城市应用, 2023 鉴于国内监控系统较为广泛地使用，使用视频鉴定交通事故已经成为了最主要的鉴定方法之一，一般采用的是结合车辆事故车辆和路面上的特征长度来求解车辆的点车速或连续车速。目前我国交通事故视频鉴定方法是通过人工鉴定，存在计算量大、复杂度高、效率低、计算结果误差大等不足，因此采用改进的时间插值算法、OpenCV、Deepsort、交通事故视频及改进的YOLOv5网络导入到所开发的交通事故视频鉴定系统中，用改进的YOLOv5进行目标车辆检测，对视频中车辆进行了标号，并利用Deepsort神经网络进行目标追踪 ...
佳佳 王 +3 more
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Nailfold capillaroscopy and deep learning in diabetes 甲襞毛细血管镜检测与深度学习在糖尿病中的应用
Journal of Diabetes, Volume 15, Issue 2, Page 145-151, February 2023., 2023 Highlights Nailfold capillary images were obtained by performing nailfold video capillaroscopy in 120 adult patients with and without diabetes. Over 5000 photographs were analyzed using machine‐learning approaches, and these models were clearly able to distinguish people based on diabetes status.
Reema Shah +6 more
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Hereditary renal glycosuria, diabetes and responses to SGLT2 inhibitor 遗传性肾性糖尿和糖尿病对SGLT2抑制剂的反应
Journal of Diabetes, Volume 14, Issue 3, Page 216-220, March 2022., 2022 Highlights Genetic renal glycosuria could not protect individuals completely from developing diabetes. However, Patients with SGLT2 gene mutations are still responsive to the SGLT2 inhibitor treatment. Abstract Aims To present the clinical features of two rare cases with hereditary renal glycosuria and diabetes, explore their responses to sodium ...
Qian Ren +3 more
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Journal of Applied Ecology, Volume 58, Issue 11, Page 2566-2578, November 2021., 2021 The development of fungicide resistance greatly threatens food security and ecological sustainability, and it is urgent need to develop agricultural practices which can ameliorate this problem. Our results show that potato crop with a genetic diversity is associated with a late blight pathogen of higher fungicide sensitivity and lower potential of ...
Li‐Na Yang +8 more
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Ultrasound in Obstetrics &Gynecology, Volume 58, Issue 2, Page 293-302, August 2021., 2021 ABSTRACT Objectives Preterm birth (PTB) accounts for two‐thirds of deaths of structurally normal babies and is associated with substantial lifetime healthcare costs. Prevention of PTB remains limited by the modest accuracy of prediction methods, namely transvaginal ultrasound (TVS) cervical length (CL) measurement and quantitative cervicovaginal fetal ...
D. O. C. Anumba +4 more
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固相萃取-高效液相色谱-串联质谱法同时测定环境水样中22种抗生素
Se pu = Chinese journal of chromatography, 2023 抗生素作为环境介质中一种典型的新污染物,在各类环境水样中检出频率高且浓度低。为快速、灵敏、准确地分析各类水体中的抗生素,建立了固相萃取-高效液相色谱-串联质谱法(SPE-HPLC-MS/MS)同时测定环境水样中4种青霉素类、12种喹诺酮类和6种大环内酯类共22种抗生素的分析方法。针对抗生素特性和样品基质特点优化前处理方法,重点优化固相萃取柱、水样pH值、水样中乙二胺四乙酸二钠(Na2EDTA)加入量。在200 mL水样中加入0.5 g Na2EDTA,并调节水样的pH值至3,经HLB固相萃取柱富集净化 ...
Jin Wang +7 more
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Gaoya dianqi, 2021 利用特高频局部放电检测方法及时发现并处理气体绝缘金属封闭开关设备（GIS）内部固体绝缘缺陷,是GIS设备运维的重要手段。目前将异常特高频信号与现行标准、规范和典型模拟缺陷图谱进行比对从而诊断缺陷类型及严重程度的方法,因现场情况复杂、设备结构各异,准确性有待进一步提升。因此文中针对现场检测中发现的GIS固体绝缘表面放电缺陷和内部气隙放电缺陷,研究该类缺陷所激发特高频局部放电信号的PRPS统计图谱特征,并利用傅里叶变换和连续小波变换分析单次特高频原始脉冲的频谱特征和时频特征 ...
周电波 +6 more
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Developmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019 目的 本国际临床指南由欧洲残疾儿童学会（the European Academy of Childhood Disability，EACD）牵头制定，旨在解决发育性协调障碍（developmental coordination disorder，DCD）的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题，通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础，以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类，最终转化为指南建议。并由国际 ...
Jing Hua +6 more
wiley +1 more source
Gaoya dianqi, 2020 针对机械性能进行检测是当前高压开关特性检测的主要方法,例如动特性仪、示波器和电秒表,此类方法无法在线进行检测,且检测周期长。针对当前高压开关特性检测中的不足,文中研究射频法在高压开关特性的现场检测与评估的应用。首先对射频法与传统机械特性测试结果的等效性进行了仿真分析,然后基于射频法在现场对某高压开关的性能进行非接触测量与评估。实验结果表明,射频法与传统检测方法检测结果等效性较好,当射频不同期时间大于5 ms时,可以认为高压开关合闸性能不合格,当射频分闸不同期时间大于3 ms ...
牛博 +5 more
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