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Ileo-right hemi-colonic cervical pull-up on a non-supercharged ileocolic arterial pedicle: A technical and case report
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作者 Andreas RR Weiss Christina Hackl +2 位作者 Yorick Soeder Hans J Schlitt Marc-H Dahlke 《World Journal of Gastroenterology》 SCIE CAS 2016年第14期3869-3874,共6页
Esophageal reconstruction can be challenging when stomach and colon are not anatomically intact and their use as esophageal substitutes is therefore limited. Innovative individual approaches are then necessary to rest... Esophageal reconstruction can be challenging when stomach and colon are not anatomically intact and their use as esophageal substitutes is therefore limited. Innovative individual approaches are then necessary to restore the intestinal passage. We describe a technique in which a short stump of the right hemicolon and 25 cm of ileum on a long, non-supercharged, fully mobilized ileocolic arterial pedicle were used for esophageal reconstruction to the neck. In this case, a 65 year-old male patient had accidentally indigested hydrochloric acid which caused necrosis of his upper digestive tract. An emergency esophagectomy, gastrectomy, duodenectomy, pancreatectomy and splenectomy had been performed in an outside hospital. A cervical esophagostomy and a biliodigestive anastomosis had been created and a jejunal catheter for enteral feeding had been placed. After the patient had recovered, a reconstruction of his food passage via the left and transverse colon failed for technical reasons due to an intraoperative necrotic demarcation of the colon. Our team then faced the situation that only a short stump of the right hemi-colon was left in situ when the patient was referred to our center. After intensified nutritional therapy, we reconstructed this patient's food passage with the right hemicolonapproach described herein. After treatment of a postoperative pneumonia, the patient was discharged from hospital on the 26 th postoperative day in a good clinical condition on an oral-only diet. In conclusion, individual approaches for long-segment reconstruction of the esophagus can be technically feasible in experienced hands. They do not always require arterial supercharging or free intestinal transplantation. 展开更多
关键词 ESOPHAGEAL cancer ESOPHAGEAL TRAUMA ESOPHAGEAL reconstruction Gastric pull-up COLONIC INTERPOSITION
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Successful management of therapy-refractory pseudoachalasia after Ivor Lewis esophagectomy by bypassing colonic pull-up:A case report
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作者 Sven Flemming Johan F Lock +4 位作者 Mohammed Hankir Stanislaus Reimer Bernhard Petritsch Christoph-ThomasGermer Florian Seyfried 《World Journal of Clinical Cases》 SCIE 2021年第16期3971-3978,共8页
BACKGROUND Gastric pull-up after esophagectomy is still a demanding surgical procedure and associated with considerable morbidity such as anastomotic leaks,fistulas or stenoses.These complications are usually managed ... BACKGROUND Gastric pull-up after esophagectomy is still a demanding surgical procedure and associated with considerable morbidity such as anastomotic leaks,fistulas or stenoses.These complications are usually managed by endoscopy,but in extreme cases multidisciplinary management including reoperations may be necessary.Here,we report managing therapy-refractory pseudoachalasia after Ivor Lewis esophagectomy by bypassing colonic pull-up.CASE SUMMARY A 70-year-old male with dysphagia and regurgitation after esophagectomy with gastric pull-up reconstruction was transferred to our tertiary hospital.Since endoscopic approaches including balloon dilatation and stenting failed,retrosternal colonic pull-up with Roux-en-Y reconstruction was performed with no subsequent adverse events.CONCLUSION Secondary colonic pull-up is a demanding but successful surgical procedure in patients suffering from therapy-refractory complaints after esophagectomy with gastric pull-up reconstruction. 展开更多
关键词 PSEUDOACHALASIA Ivor Lewis esophagectomy Dysphagia Colonic pull-up Esophageal stenting Case report
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Local random flaps for cervical circumferential defect or tracheoesophageal fistula reconstruction after failed gastric pull-up: Two case reports
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作者 Ye Zhang Yang Liu +2 位作者 Yu Sun Meng Xu Xiao-Lei Wang 《World Journal of Clinical Cases》 SCIE 2021年第33期10328-10336,共9页
BACKGROUND Total pharyngo-laryngo-esophagectomy with a reconstruction of gastric pull-up is the most common treatment method for patients with multiple primary upper digestive tract carcinomas,such as hypopharyngeal c... BACKGROUND Total pharyngo-laryngo-esophagectomy with a reconstruction of gastric pull-up is the most common treatment method for patients with multiple primary upper digestive tract carcinomas,such as hypopharyngeal carcinoma with thoracic esophageal carcinoma.However,neck circumferential defect and tracheoesophageal fistula after gastric necrosis are still challenging problems for surgeons and patients.CASE SUMMARY This case report presents 2 patients who underwent reconstructive surgeries using 4 local random flaps with a split thickness skin graft in the first case,and 6 local random flaps in the second case to close the circumferential defect and tracheoesophageal fistula after failed gastric pull-up.Both patients achieved good swallowing function and could take solid diet without dysphagia postoperatively.CONCLUSION For selected patients,local random flaps(with a split thickness skin graft)can be a simple and reliable solution for reconstructing tracheoesophageal fistula or cervical circumferential defect after gastric necrosis,especially when the necrosis extends below the thoracic inlet. 展开更多
关键词 Local random flap Cervical circumferential defect reconstruction Tracheoesophageal fistula reconstruction Failed gastric pull-up Total pharyngo-laryngoesophagectomy Case report
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对Pull-up效应革的认识
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作者 曹龙根 《中国皮革》 CAS 1991年第11期25-27,共3页
笔者根据近几年外国化工公司来沪交流的情况,以及笔者从事新产品项目研究的实践经验,重点阐述Pull—up效应革的特征、特点、变色机理、Pull—up油的特性、坯革、涂层的剖析、产品企业标准的制定。
关键词 pull-up皮革 油浸变色革 生活用革
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一种高频单片GaN DC-DC降压转换器设计
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作者 何凡 沈红伟 +1 位作者 来龙坤 罗卫军 《微电子学》 CAS 北大核心 2024年第3期417-423,共7页
基于全耗尽型(D-mode)0.25μm硅基氮化镓(GaN-on-Si)工艺,设计了一款高频单片GaN DC-DC降压转换器芯片。该芯片集成了驱动电路和半桥功率级电路,驱动电路中电平放大功能通过有源上拉结构实现,在100~200 MHz频率范围内,单片GaN DC-DC降... 基于全耗尽型(D-mode)0.25μm硅基氮化镓(GaN-on-Si)工艺,设计了一款高频单片GaN DC-DC降压转换器芯片。该芯片集成了驱动电路和半桥功率级电路,驱动电路中电平放大功能通过有源上拉结构实现,在100~200 MHz频率范围内,单片GaN DC-DC降压转换器可直接被0.7 V的高速脉冲信号控制,无需片外模块,其峰值功率级效率达到92.2%,峰值总效率达到84.24%,峰值功率为7.7 W。相较于前期工作,芯片工作范围从100 MHz提升至200 MHz,在保证芯片效率性能的情况下,实现了对工作频率的大幅提升。 展开更多
关键词 GaN DC-DC降压转换器 单片电路 驱动电路 有源上拉结构
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临近空间球载飞行器投放控制关键技术综述
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作者 户艳鹏 郭金 +3 位作者 贾瑞龙 冯慧 蒙文跃 刘萍 《控制理论与应用》 EI CAS CSCD 北大核心 2024年第2期210-220,共11页
临近空间作为地球新的认知领域和重要的国家安全空间逐渐受到世界主要大国的重视.临近空间飞行器球载投放起飞方式能够使飞行器快速达到期望的飞行高度,同时减少因穿越对流层稠密大气所需的能源消耗,因而受到广泛关注并迅速发展成为临... 临近空间作为地球新的认知领域和重要的国家安全空间逐渐受到世界主要大国的重视.临近空间飞行器球载投放起飞方式能够使飞行器快速达到期望的飞行高度,同时减少因穿越对流层稠密大气所需的能源消耗,因而受到广泛关注并迅速发展成为临近空间飞行器起飞的一种重要方式.独特的球载投放起飞方式对高空气球及被投放飞行器的多项控制关键技术提出了较高的要求,高空低密度的飞行环境使得低速飞行具有明显的低雷诺数特性,随高度剧烈变化的风场增加了球载平台定点区域驻空的难度,载球系统上升过程的旋转运动给投放控制带来巨大的干扰,投放时刻的判断与拉起控制给大翼展柔性飞行器带来了新挑战.本文梳理了临近空间球载飞行器投放控制的关键技术及其研究现状,并对其未来的应用进行了展望. 展开更多
关键词 投放飞行器 低雷诺数特性 动力学模型 定点驻空控制 反转控制 拉起控制
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表面肌电监测在引体向上教学训练中的应用研究
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作者 翟明明 师正辉 +3 位作者 李远辙 张晨旭 罗二平 汤池 《空军军医大学学报》 CAS 2024年第11期1257-1261,共5页
目的针对军队男性文职人员体能考核引体向上科目及格率较低、训练效果不理想的问题,基于人因工程学表面肌电监测方法对受试者引体向上运动进行分析,探究表面肌电信号辅助引体向上教学训练是否可行。方法随机选取5名男性社会招聘文职人员... 目的针对军队男性文职人员体能考核引体向上科目及格率较低、训练效果不理想的问题,基于人因工程学表面肌电监测方法对受试者引体向上运动进行分析,探究表面肌电信号辅助引体向上教学训练是否可行。方法随机选取5名男性社会招聘文职人员,通过监测其引体向上运动过程中肱桡肌、肱二头肌、三角肌后束、斜方肌和背阔肌电信号,选用肌肉激活强度、贡献率和激活时序3个参数分析受试者技术动作特性。结果肌电监测数据显示,受试者肌肉激活强度、贡献率和肌肉激活时序等与标准引体向上存在差异。受试者主发力肌群为肱桡肌和肱二头肌,斜方肌与背阔肌激活不足,导致三角肌后束与肱二头肌代偿发力,作为辅助肌群的三角肌后束贡献率高于背阔肌。结论表面肌电监测可将视觉无法观察到的内在肌肉动作以肌电信号形式呈现,辅助教员及时分析受试者的技术动作特性,为后续进行针对性训练指导提供参考。 展开更多
关键词 表面肌电 引体向上 体能训练 体育教学
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免缝拉合技术在山区门诊术后延迟愈合伤口护理中的应用价值
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作者 骆传丽 陈倩倩 《临床医学研究与实践》 2024年第1期173-176,共4页
目的探究免缝拉合技术在山区门诊术后延迟愈合伤口护理中的应用价值。方法选取2018年8月至2020年8月在本院门诊就诊、接受过外科手术治疗的80例伤口延迟愈合患者为研究对象,根据就诊时间将其分为对照组(39例)和研究组(41例)。对照组采... 目的探究免缝拉合技术在山区门诊术后延迟愈合伤口护理中的应用价值。方法选取2018年8月至2020年8月在本院门诊就诊、接受过外科手术治疗的80例伤口延迟愈合患者为研究对象,根据就诊时间将其分为对照组(39例)和研究组(41例)。对照组采用常规护理,研究组采用免缝拉合技术。比较两组的干预效果。结果研究组的治疗总有效率高于对照组(P<0.05)。干预2、4周后,两组的创面面积均小于干预前,且研究组小于对照组(P<0.05);研究组的温哥华瘢痕量表(VSS)评分、换药费用低于对照组(P<0.05)。干预4周后,两组的伤口面积、渗液量及创面组织类型评分均低于干预前,且研究组低于对照组(P<0.05)。结论免缝拉合技术应用于山区门诊术后延迟愈合伤口患者中,具有简单、方便等优势,可以减少瘢痕,缩短伤口愈合时间,降低医疗费用。 展开更多
关键词 免缝拉合技术 山区门诊 延迟愈合伤口 PICC透明贴
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Partial gastric pull-up in the treatment of patients with long-gap esophageal atresia
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作者 Marc Reismann Tina Granholm Henrik Ehrén 《World Journal of Pediatrics》 SCIE CSCD 2015年第3期267-271,共5页
Background:This study was to analyze outcomes of long-gap esophageal atresia(LGEA)treated with partial gastric pull-up(PGP)into the thorax.Methods:The medical records of all children who had undergone PGP for LGEA fro... Background:This study was to analyze outcomes of long-gap esophageal atresia(LGEA)treated with partial gastric pull-up(PGP)into the thorax.Methods:The medical records of all children who had undergone PGP for LGEA from 1999 to 2012 were reviewed.Preoperative data,initial postoperative course,complications,time to full oral nutrition,follow-up diagnostics and nutritional status were assessed.Results:Nine children who had undergone PGP were followed up for a mean period of 6.2±3.1 years.Their median gestational age was 37+2 weeks,and mean birth weight 2462±658 g.Eight children were primarily treated with a gastrostomy,their mean age at PGP was 11.4+10.9 weeks and mean weight was 4484+1966 g.Their mean operation time was 199+51 minutes.Leakage was an early postoperative complication in three children,one of whom had a consecutive stricture resection.Late complications were stenosis(n=7)and gastro-esophageal reflux(n=5).The general status of the children was judged as"good"or"very good"on the last presentation.The median percentile of the body-mass-index was 25.Gastroscopy at 3.7±3.2 years after the operation revealed a grade I esophagitis in two children.There was no death in this group of children.Conclusions:Because of its high complication rate,partial gastric pull-up cannot be recommended as an alternative for the treatment of LGEA at present.A final judgment could be made on the basis of a comparative study. 展开更多
关键词 early childhood esophageal atresia gastric pull-up
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Improvement of Physical Fitness Test Assessment Criteria Based on fNIRS Technology:Taking Pull-Up as an Example
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作者 Gong Bin Yu Xianghua +4 位作者 Fang Yu Wang Zheng Yang Hao Chen Guodong LÜNa 《Journal of Shanghai Jiaotong university(Science)》 EI 2022年第2期219-225,共7页
Pull-up,as an important physical fitness test event of the“National Student Physical Health Standard”,is known as a difficult physical fitness test event.To improve the assessment criteria of pull-ups,this paper use... Pull-up,as an important physical fitness test event of the“National Student Physical Health Standard”,is known as a difficult physical fitness test event.To improve the assessment criteria of pull-ups,this paper uses the functional near-infrared spectroscopy(fNIRS)to monitor the changes and activation of oxyhemoglobin(HbO)signals in the brain motor cortex of people with different body mass indexes(BMIs)during the pullup assessment.Then the relationship between BMIs and evaluation criteria is discussed.After collecting and analyzing experimental data of 18 recruited college students,it is found that the number of pull-ups performed by people with different BMIs is different when they reach the peak state of brain activation.The results of the study indicate that different assessment criteria should be adopted for different BMI groups.It is suggested that the BMI should be introduced as one of the test indexes in the examination of pull-ups event in“National Student Physical Health Standard”. 展开更多
关键词 functional near-infrared spectroscopy(fNIRS) body mass index(BMI) pull-up brain activation
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新能源汽车进气风箱面盖注塑模具的创新设计
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作者 马小伟 张维合 《塑料工业》 CAS CSCD 北大核心 2024年第6期97-101,共5页
根据某款新能源汽车进气风箱面盖的结构特点和技术要求,设计了一副复杂侧向抽芯机构注塑模具。通过采用1个斜向滑块成型和2个不同方向侧向倒扣的复合侧向抽芯机构,有效地解决了模具在生产过程中侧向抽芯容易发生卡滞故障的问题。通过采... 根据某款新能源汽车进气风箱面盖的结构特点和技术要求,设计了一副复杂侧向抽芯机构注塑模具。通过采用1个斜向滑块成型和2个不同方向侧向倒扣的复合侧向抽芯机构,有效地解决了模具在生产过程中侧向抽芯容易发生卡滞故障的问题。通过采用11组“直通式冷却水管+隔片式冷却水井”组合式随形水路的冷却系统,有效地解决了成型塑件变形及尺寸精度较差的问题。模具结构先进合理,投产后运行平稳顺利,成型周期降低了约12%,成型塑件尺寸精度提高了一级,达到了MT3(GB/T 14486—2008)。 展开更多
关键词 汽车进气风箱面盖 注塑模具 抽芯机构 随形冷却水路 温度控制系统
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自升式钻井平台插拔桩技术发展现状及趋势
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作者 谭瑞龙 段梦兰 +1 位作者 徐斌 陈栎达 《船舶与海洋工程》 2024年第2期1-6,共6页
针对自升式钻井平台在插桩和拔桩过程中面临的土工问题,系统地梳理插桩和拔桩涉及的关键技术。分析插桩过程中的土工试验技术、土体破坏机理、上硬下软地层承载力和桩脚滑移问题;阐述拔桩过程中的拔桩阻力计算方法和减小拔桩阻力方法的... 针对自升式钻井平台在插桩和拔桩过程中面临的土工问题,系统地梳理插桩和拔桩涉及的关键技术。分析插桩过程中的土工试验技术、土体破坏机理、上硬下软地层承载力和桩脚滑移问题;阐述拔桩过程中的拔桩阻力计算方法和减小拔桩阻力方法的研究进展情况。在此基础上,根据目前面临的新挑战,提出今后自升式钻井平台插拔桩技术研究的重点,并预测其发展趋势。 展开更多
关键词 自升式钻井平台 插桩 拔桩 穿刺 拔桩阻力
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AFA3G燃料组件拉棒机爪头收爪工艺分析与改进
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作者 宗奔阳 王雨浓 《现代制造技术与装备》 2024年第7期151-153,共3页
分析AFA3G燃料组件拉棒机拉杆爪头收爪工艺的原理及存在的问题,提出有针对性的改进措施,包括爪头和卡管的材质、尺寸、表面处理等方面的优化。通过定性和定量对比分析,改进后的收爪工艺的可靠性明显提升,有效避免了燃料组件产品的质量... 分析AFA3G燃料组件拉棒机拉杆爪头收爪工艺的原理及存在的问题,提出有针对性的改进措施,包括爪头和卡管的材质、尺寸、表面处理等方面的优化。通过定性和定量对比分析,改进后的收爪工艺的可靠性明显提升,有效避免了燃料组件产品的质量隐患。 展开更多
关键词 拉棒机 爪头 收爪工艺 卡管 燃料组件
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黏土中海上风电三筒基础上拔阻力特性研究 被引量:1
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作者 张浦阳 信连硕 +1 位作者 乐丛欢 丁红岩 《新能源进展》 CSCD 2023年第6期506-511,共6页
通过数值仿真的方式对黏土中三筒导管架基础上拔阻力特性进行研究,明确吸力筒直径与筒高对三筒基础上拔阻力曲线的影响与上拔过程中吸力筒所受摩擦力的分布特征。结果表明:三筒导管架上拔阻力随基础位移呈现快速升高后逐渐回落的特点;... 通过数值仿真的方式对黏土中三筒导管架基础上拔阻力特性进行研究,明确吸力筒直径与筒高对三筒基础上拔阻力曲线的影响与上拔过程中吸力筒所受摩擦力的分布特征。结果表明:三筒导管架上拔阻力随基础位移呈现快速升高后逐渐回落的特点;最大上拔阻力随着吸力筒直径的增大而近似线性增大,最大上拔阻力对应的基础位移稳定在吸力筒筒高的2%左右;在上拔过程中,筒壁摩擦力从向上转为向下,吸力筒下部摩擦力与吸力筒外侧摩擦力都表现出了更快的响应速度;仅自重作用下基础吸力筒摩擦力分布与破土时刻吸力筒摩擦力分布规律相似、大小相近、方向相反;吸力筒内壁摩擦力相较于吸力筒外壁摩擦力沿圆周分布更加均匀。 展开更多
关键词 三筒导管架基础 上拔阻力 摩擦力 黏土 海上风电
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Graft dilatation and Barrett’s esophagus in adults after gastric pullup and jejunal interposition for long-gap esophageal atresia
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作者 Eleonora Sofie van Tuyll van Serooskerken Gabriele Gallo +10 位作者 Bas L Weusten Jessie Westerhof Lodewijk AA Brosens Sander Zwaveling Jetske Ruiterkamp Jan BF Hulscher Hubertus GM Arets Arnold JN Bittermann David C van der Zee Stefaan HAJ Tytgat Maud YA Lindeboom 《World Journal of Gastrointestinal Endoscopy》 2023年第9期553-563,共11页
BACKGROUND Esophageal replacement(ER)with gastric pull-up(GPU)or jejunal interposition(JI)used to be the standard treatment for long-gap esophageal atresia(LGEA).Changes of the ER grafts on a macro-and microscopic lev... BACKGROUND Esophageal replacement(ER)with gastric pull-up(GPU)or jejunal interposition(JI)used to be the standard treatment for long-gap esophageal atresia(LGEA).Changes of the ER grafts on a macro-and microscopic level however,are unknown.AIM To evaluate long-term clinical symptoms and anatomical and mucosal changes in adolescents and adults after ER for LGEA.METHODS A cohort study was conducted including all LGEA patients≥16 years who had undergone GPU or JI between 1985-2003 at two tertiary referral centers in the Netherlands.Patients underwent clinical assessment,contrast study and endoscopy with biopsy.Data was collected prospectively.Group differences between JI and GPU patients,and associations between different outcome measures were assessed using the Fisher’s exact test for bivariate variables and the Mann-Whitney U-test for continuous variables.Differences with a P-value<0.05 were considered statistically significant.RESULTS Nine GPU patients and eleven JI patients were included.Median age at follow-up was 21.5 years and 24.4 years,respectively.Reflux was reported in six GPU patients(67%)vs four JI patients(36%)(P=0.37).Dysphagia symptoms were reported in 64%of JI patients,compared to 22%of GPU patients(P=0.09).Contrast studies showed dilatation of the jejunal graft in six patients(55%)and graft lengthening in four of these six patients.Endoscopy revealed columnar-lined esophagus in three GPU patients(33%)and intestinal metaplasia was histologically confirmed in two patients(22%).No association was found between reflux symptoms and macroscopic anomalies or intestinal metaplasia.Three GPU patients(33%)experienced severe feeding problems vs none in the JI group.The median body mass index of JI patients was 20.9 kg/m^(2) vs 19.5 kg/m^(2) in GPU patients(P=0.08).CONCLUSION The majority of GPU patients had reflux and intestinal metaplasia in 22%.The majority of JI patients had dysphagia and a dilated graft.Follow-up after ER for LGEA is essential. 展开更多
关键词 Long-gap esophageal atresia Jejunal interposition Gastric pull-up Barrett’s esophagus Intestinal metaplasia Esophageal replacement
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单桩抗拔试验最大试验荷载取值分析 被引量:2
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作者 邹飞虎 《建筑技术开发》 2023年第1期152-154,共3页
为研究抗拔试验最大试验荷载取值的合理性,归纳抗拔桩的设计原则,对比不同检测标准中抗拔桩的试验要求,通过理论分析,总结出抗拔试验最大试验荷载取值可能存在的问题。提出统一设计抗拔承载力特征值定义,建立具有明确理论意义的抗拔最... 为研究抗拔试验最大试验荷载取值的合理性,归纳抗拔桩的设计原则,对比不同检测标准中抗拔桩的试验要求,通过理论分析,总结出抗拔试验最大试验荷载取值可能存在的问题。提出统一设计抗拔承载力特征值定义,建立具有明确理论意义的抗拔最大试验荷载取值等建议。 展开更多
关键词 抗拔桩 静载试验 抗拔最大试验荷载 抗拔承载力特征值
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悬挑脚手架材料创新及节点优化的研究与应用 被引量:1
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作者 施洪飞 《工程质量》 2023年第S01期126-129,共4页
传统花篮螺栓悬挑脚手架施工过程中,主梁在飘窗、花池位置处的上拉杆无法采用常规的外拉方式,且内拉由于拉杆弯曲受剪导致其安全性与稳定性无法得到有效的保障,因此本文对于飘窗和花池处悬挑脚手架上拉杆的优化及材料创新进行了研究讨论。
关键词 悬挑脚手架 上拉体系 加长钢板 新型拉杆
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循环流化床锅炉屏式过热器拉裂原因分析及预防 被引量:3
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作者 陈永生 《中国特种设备安全》 2023年第2期66-70,共5页
某电厂2台循环流化床锅炉短时间内集中出现屏式过热器管拉裂,电厂组织分析了管子拉裂的原因并进行相应整改。为彻底解决拉裂问题,通过对屏式过热器结构检查、与屏式再热器特性比对、锅炉运行工况及管屏交变应力作用分析等,全面梳理设备... 某电厂2台循环流化床锅炉短时间内集中出现屏式过热器管拉裂,电厂组织分析了管子拉裂的原因并进行相应整改。为彻底解决拉裂问题,通过对屏式过热器结构检查、与屏式再热器特性比对、锅炉运行工况及管屏交变应力作用分析等,全面梳理设备存在的问题,提出下一步的防范措施。从而指导电厂全方位做好屏式过热器拉裂治理,提高机组深度调峰适应能力。 展开更多
关键词 循环流化床 锅炉 屏式过热器 拉裂 深度调峰
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老炼试验中上下拉电阻实例分析 被引量:2
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作者 周杰 周蕾 成锡军 《电子质量》 2023年第1期87-90,共4页
在芯片正常运行过程中,需要对特定的IO烧录口进行电平钳制,即保持在高/低电平。为了达到这样的目的,在设计硬件时,需要给烧录口进行上下拉电阻的匹配。从实际中的一个具体项目出发解释了正确使用上下拉电阻对芯片信号的影响和作用。通... 在芯片正常运行过程中,需要对特定的IO烧录口进行电平钳制,即保持在高/低电平。为了达到这样的目的,在设计硬件时,需要给烧录口进行上下拉电阻的匹配。从实际中的一个具体项目出发解释了正确使用上下拉电阻对芯片信号的影响和作用。通过查阅相关资料,并结合本次项目试验和经验总结,阐述了上下拉电阻的使用和选择方法,以期能够提高信号稳定性并为硬件设计工程师提供一些帮助或灵感。 展开更多
关键词 IO 上/下拉电阻 信号 稳定性 电平钳制
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基于图像视觉的引体向上智能检测技术
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作者 严晓波 潘凤 +1 位作者 张艳莎 王杰 《工业控制计算机》 2023年第6期46-47,49,共3页
引体向上作为高校大学生体质检测的必测项目,评价标准需客观、公正,通过人工计数的测评考核方式存在错判、漏判的问题,且在大规模测试时易出现疲劳、效率低等情况。为此,将计算机图像处理应用到体测项目里,通过视频实时对引体向上体测... 引体向上作为高校大学生体质检测的必测项目,评价标准需客观、公正,通过人工计数的测评考核方式存在错判、漏判的问题,且在大规模测试时易出现疲劳、效率低等情况。为此,将计算机图像处理应用到体测项目里,通过视频实时对引体向上体测项目进行动作标准检测并自动计数。在实际运动场现场实验,精准测出引体向上标准动作成绩,对体育器材改造具有实用价值。 展开更多
关键词 引体向上 图像处理 自动计数
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