期刊文献+
共找到35,181篇文章
< 1 2 250 >
每页显示 20 50 100
康复机器人训练脑性瘫痪患者:改善下肢运动功能效果的Meta分析
1
作者 刘兴朝 胡通 +4 位作者 马艳 王倩 魏晓辉 常万鹏 于少泓 《中国组织工程研究》 CAS 北大核心 2025年第18期3925-3933,共9页
目的:系统评价康复机器人治疗脑性瘫痪患者下肢运动功能的临床效果,并比较不同机器人的疗效差异。方法:检索PubMed、Web of Science、Embase、Cochrane Library、中国知网、中国生物医学文献数据库、维普和万方数据库,搜集从建库至2024-... 目的:系统评价康复机器人治疗脑性瘫痪患者下肢运动功能的临床效果,并比较不同机器人的疗效差异。方法:检索PubMed、Web of Science、Embase、Cochrane Library、中国知网、中国生物医学文献数据库、维普和万方数据库,搜集从建库至2024-04-10发表的关于康复机器人治疗脑性瘫痪患者运动功能障碍的随机对照试验。主要结局指标包括肌肉力量,肌张力、平衡功能、步速、步频、步长、步行耐力、下肢运动功能、日常生活活动能力。根据《国际功能、残疾和健康分类》对上述指标进行编码,通过Meta分析评价临床疗效并比较不同机器人的疗效差异。由2名研究人员进行文献检索与筛选,使用Cochrane 5.1.0偏倚风险评估工具对纳入文献进行质量评价。采用RevMan 5.4软件和Stata 16.0软件进行Meta分析。结果:①最终纳入15篇文献,共512例患者,试验组260例、对照组252例。②Meta分析结果显示,与常规康复疗法相比,康复机器人可以提高身体结构和功能(SMD=0.41,95%CI:0.24-0.58,P<0.05)、活动(SMD=0.53,95%CI:0.41-0.65,P<0.05)和参与能力(MD=7.86,95%CI:1.54-14.18,P<0.05)。其中,康复机器人可以改善脑性瘫痪患者下肢肌力、平衡功能、步速、步行耐力、下肢粗大运动功能和日常生活活动能力,但对步频、步长和肌张力的效果不明显。③网状Meta分析结果显示,步速:Innowalkpro>Gait trainer>Lokomat>3DCalt;6MWT评分:Gait trainer>Lokomat>Lokohelp>Innowalkro;GMFM-88D区评分:Lokohelp>Lokomat>KidGo>Innowalkpro>3DCalt;GMFM-88E区评分:Lokomat>Lokohelp>KidGo>3DCalt>Innowalkpro。结论:基于《国际功能、残疾和健康分类》,康复机器人训练可以改善脑性瘫痪患者下肢运动功能和日常生活活动能力。在改善步速方面,Innowalkpro机器人效果更优;在改善6MWT评分方面,Gait trainer机器人效果更优;在改善GMFM-D区评分方面,Lokohelp机器人效果更优;在改善GMFM-E区评分方面,Lokomat机器人效果更优。 展开更多
关键词 脑性瘫痪 康复机器人 下肢运动功能 步行 步态 日常生活活动 系统评价 网状Meta分析 工程化康复
下载PDF
基于活产建立体外受精-胚胎移植精子DNA碎片指数的参考阈值及子代短期安全性
2
作者 周超 王淑娴 +2 位作者 于春梅 庾广聿 蒋月园 《中国组织工程研究》 CAS 北大核心 2025年第1期111-119,共9页
背景:精子DNA碎片指数与受精、胚胎发育潜能、胚胎植入、流产及子代安全性等存在显著的相关性。然而,其临床参考值受多种因素的影响,导致临床意义极其有限,该研究以活产为结局,通过倾向评分匹配校正其他混杂因素后,构建精子DNA碎片指数... 背景:精子DNA碎片指数与受精、胚胎发育潜能、胚胎植入、流产及子代安全性等存在显著的相关性。然而,其临床参考值受多种因素的影响,导致临床意义极其有限,该研究以活产为结局,通过倾向评分匹配校正其他混杂因素后,构建精子DNA碎片指数与活产的最佳临床截断值,并对其进行内外部验证,具有较好的预测价值及临床应用效能。目的:探讨基于活产建立体外受精-胚胎移植精子DNA碎片指数的参考阈值及子代短期安全性。方法:选取2019年5月至2021年5月于常州市妇幼保健院接受体外受精-胚胎移植患者1921例,以倾向匹配容差0.02为标准,1∶1进行倾向评分匹配,结果活产组与非活产组各成功匹配540例,以此建立模型组;通过选取同时期广西壮族自治区南溪山医院接受体外受精-胚胎移植患者135例作为外部验证组;采用受试者工作曲线探求精子DNA碎片指数对活产的临床最佳截断值,分别采用限制性立方样条曲线、标准曲线、临床决策曲线、临床影响曲线及内外部验证等方法,对该截断值的准确性及临床应用效能进行评估。结果与结论:(1)非活产组精子DNA碎片指数显著高于活产组且与活产存在显著的负相关性(r=-0.444,P<0.001);(2)受试者工作曲线结果显示,DNA碎片指数对活产的最佳截断值为24.33%,曲线下面积为0.775(0.746,0.804),特异度为72.60%,敏感度为78.90%,准确度为75.70%;(3)限制性立方样条曲线拟合Logistic回归结果显示,当精子DNA碎片指数大于24.57%时,临床非活产的风险呈趋势性增涨;(4)Logistic回归概率分析结果显示,精子DNA碎片指数为活产的危险因素[OR(95%CI)=0.916(0.904,0.928),P<0.001],且当精子DNA碎片指数大于27.78%时,临床活产发生的概率将小于50%,随着精子DNA碎片指数每增高1个单位,活产的概率下降8.4%;(5)内外部对该临床截断值的验证均显示,该截点具有一定的临床预测价值及准确性;(6)临床决策曲线与临床影响曲线显示,以该临床截断值建立的预测模型在阈概率为0.22-0.73时具有临床最大净获益值,且在该阈概率范围内损失与获益的比值始终小于1,证实该预测模型具有较好的临床应用效能;(7)精子DNA碎片指数与子代短期安全性分析结果显示,精子DNA碎片指数与出生儿早产、体质量、畸形、性别差异无显著性;(8)结果表明,精子DNA碎片指数对体外受精-胚胎移植活产的最佳临床截断值为24.33%,以此建立的临床预测模型具有较好的区分度、准确度与临床应用效能,精子DNA碎片指数对子代短期安全性影响并不显著,但仍需大样本及长期的追踪评估。 展开更多
关键词 精子DNA碎片指数 活产 体外受精-胚胎移植 子代安全性 最佳截断值
下载PDF
不同类型女性髌股关节疼痛综合征患者的下肢生物力学特征
3
作者 董友清 魏子轩 +4 位作者 吴海鸥 陈瑞兄 段鹏 陈楠 林熙凯 《中国组织工程研究》 CAS 北大核心 2025年第21期4458-4468,共11页
背景:目前国内外关于髌股关节疼痛综合征的运动学和动力学研究已经涉及到上下楼梯、行走等日常生活活动。但是不同距下关节状态的髌股关节疼痛综合征年轻女性患者的下肢生物力学特征尚未见报道。目的:探究不同距下关节功能状态的髌股关... 背景:目前国内外关于髌股关节疼痛综合征的运动学和动力学研究已经涉及到上下楼梯、行走等日常生活活动。但是不同距下关节状态的髌股关节疼痛综合征年轻女性患者的下肢生物力学特征尚未见报道。目的:探究不同距下关节功能状态的髌股关节疼痛综合征年轻女性患者的下肢生物力学特征,为临床治疗不同类型的髌股关节疼痛综合征提供理论支撑。方法:共纳入受试者33例,其中健康对照组(C组)10例,其余27例髌股关节疼痛综合征受试者根据足姿指数分组,距下关节正常组(A组,足姿指数0-6分)14例,距下关节异常组(B组,足姿指数7-12分)13例。采集各组受试者在正常速度下阶梯时的生物力学指标并进行对比,运动学指标选取初始触地时刻与支撑期屈膝角度最大时刻的髋膝三维关节角度与踝矢状面关节角度;动力学指标选取支撑期屈膝角度最大时刻的髋膝三维关节力矩与踝矢状面关节力矩;表面肌电指标选取股内侧肌、股外侧肌、股直肌、半腱半膜肌、股二头肌和臀中肌在预激活阶段和缓冲阶段的均方根振幅。结果与结论:(1)在初始触地时刻,A组相较于B组有更大的屈膝角度(P <0.05)、髋外旋角度(P <0.01)和更小的膝外旋角度(P <0.01);A组与C组相比有更大的屈膝角度和更小的屈髋角度(均为P<0.01);B组和C组相比有更大的膝外旋角度和更小的髋外旋角度、屈髋角度(均为P<0.01);(2)在屈膝角度最大时刻,A组相较于B组有更小的膝外翻角度(P<0.05)、膝外旋角度(P<0.05)和更大的屈膝角度(P<0.01);A组相较于C组有更小的膝外翻角度(P <0.05)、屈髋角度(P <0.01)和髋外旋角度(P <0.05);B组相较于C组有更小的屈膝角度、屈髋角度、髋外旋角度和更大的膝外旋角度(均为P <0.01);且A组相较于C组有更大的髋内旋力矩(P <0.05)和跖屈力矩(P <0.01);(3)在正常速度下阶梯缓冲阶段时,C组相较于A组有更大的股外侧肌(P <0.05)、股内侧肌(P <0.01)、臀中肌(P <0.01)和股二头肌(P <0.05)激活程度;C组相较于B组有更大的股内侧肌(P <0.01)、臀中肌(P <0.01)和股二头肌(P <0.05)激活程度;A组相较于B组(P <0.05)有更大的半腱半膜肌激活程度;(4)结果表明,髌股关节疼痛综合征年轻女性患者在下阶梯时,髋、膝关节缓冲机制更加僵硬,不足之处可能由踝关节缓冲来代偿;下肢肌肉激活程度低是导致年轻女性罹患髌股关节疼痛的因素;距下关节正常组的下肢生物力学特征异常可能是髋膝关节屈曲不足导致的;距下关节异常组的下肢生物力学特征异常可能是距下关节过度旋前造成的。 展开更多
关键词 距下关节 髌股关节疼痛综合征 运动学 动力学 表面肌电 日常生活活动 女性
下载PDF
The Imprint of Williams James on Gertrude Stein in Three Lives
4
作者 刘莹 《科技视界》 2013年第33期240-240,235,共2页
Gertrude Stein is regarded as one of the most remarkable writers of the twentieth century.This paper tries to analyze her early work Three Lives under the influence of Williams James from the aspect of Jamesian psycho... Gertrude Stein is regarded as one of the most remarkable writers of the twentieth century.This paper tries to analyze her early work Three Lives under the influence of Williams James from the aspect of Jamesian psychology analysis and the famous prolonged present to conclude that Gertrude Stein is undeniably unorthodox. 展开更多
关键词 斯泰因 文学作品 艺术欣赏 内容介绍 作家
下载PDF
Simple Formula of β^+-Decay Half-Lives of Nuclei Far From β-Stable Line 被引量:4
5
作者 ZHANG Xiao-Ping~1 REN Zhong-Zhou~(1,2)and ZHI Qi-Jun~1~1 Department of Physics,Nanjing University,Nanjing 210008,China~2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy-Ion Accelerator,Lanzhou 730000,China 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第12期1072-1080,共9页
We generalize the formula of β^+-decay half-lives [Phys.Rev.C 78 (2006) 014305] to include all availabledata of nuclei far from the β-stable line. Good agreement with experimental data is obtained by taking into acc... We generalize the formula of β^+-decay half-lives [Phys.Rev.C 78 (2006) 014305] to include all availabledata of nuclei far from the β-stable line. Good agreement with experimental data is obtained by taking into accountthe even-odd (e-o) effect.It is shown that the e-o effect on β^+-deeay half-life is apparent for the allowed β^+-transition,whereas it is not apparent for the first and second forbidden transitions.This demonstrates that the allowed β^+-transitionis more sensitive to the nuclear even-odd effect than the forbidden β^+-transition.The underlying physics is discussed.This formula can be used to predict the β^+-decay half-lives of the nuclei far from β-stability.It is useful to experimentalphysicists for analyzing the data of β^+-decay. 展开更多
关键词 β^+-decay half-lives FORMULA even-odd effect
下载PDF
The Time of Our Lives
6
作者 谭秀林 王花屏 《中学生英语(高中版)》 2006年第Z4期41-,共1页
关键词 The Time of Our lives
下载PDF
The African Moringa is to change the lives of millions in Ethiopia and far beyond
7
作者 Solomon Habtemariam 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2016年第4期355-356,共2页
Dear Editor,I vividly recall one of my medicinal plant collection trips in the southern regions of Ethiopia back in 1986.Besides collecting few plants of interest,we were asking the locals to show us medicinal plants ... Dear Editor,I vividly recall one of my medicinal plant collection trips in the southern regions of Ethiopia back in 1986.Besides collecting few plants of interest,we were asking the locals to show us medicinal plants of importance in the region.Within few minutes,a group of enthusiastic young men brought us branches 展开更多
关键词 Moringa AFRICAN BRANCHES lives minutes millions collection MEDICINAL usage COLLECTING
下载PDF
Prediction of Radioactive Half-Lives and Atomic Nucleus Dimensions in a Concentric Shell Model or Flocon Model
8
作者 Marc Mignonat 《Journal of Modern Physics》 CAS 2022年第8期1216-1251,共36页
Considering only the wave aspect, we determine the energy of a bond between 2 nucleons;this quantified energy is associated with a standing wave. Then, starting from the mass loss corresponding to this energy, we dete... Considering only the wave aspect, we determine the energy of a bond between 2 nucleons;this quantified energy is associated with a standing wave. Then, starting from the mass loss corresponding to this energy, we determine the number of bonds in this nucleus. The mass defect value for a link is used to determine a specific length at that link. Fixing a precise distance between nucleons makes it possible to determine a geometry of the nucleus and its dimensions. It makes it possible to understand when this bond is stronger than the electrostatic force and allows deducing a shell model built in a precise order. The calculation on the mass defect will also make it possible to determine that one or more nucleons concerned by the radioactivity will be bound by a single bond to the rest of the nucleus or, on the contrary, bound by several bonds which induce short 1/2 lives or, on the contrary, very long. The analysis of the bonds on H, He and C make it possible to write formulae which are then applied to the nuclei to find the radioactive 1/2 lives. To find by equations the radioactive 1/2 lives does not call into question the standard model since it concerns only the defect of mass of the nuclei with energies that are not used to find the main particles of the standard model. This model, which favours a geometric approach to the detriment of a mathematical approach based on differential equations, can lead to theoretical questions about the possibility of interpreting the structure of the nucleus in a more undulatory way. It is possible to explain radioactivity in a more deterministic way. 展开更多
关键词 ½ Radioactive lives Atomic Nucleus Dimensions Shell Model
下载PDF
推荐一款DirectX8.0游戏——《No One Lives Forever2》
9
作者 武峰 《微型计算机》 北大核心 2002年第23期58-58,共1页
关键词 DirectX8.0游戏 网络游戏 《No ONE lives Forever2》
下载PDF
Xiao-Ping Chen:the“Master of the Scalpel”who saves lives by entering the forbidden territory of hepatopancreatobiliary surgery
10
作者 Editorial Office of Oncology and Translational Medicine 《Oncology and Translational Medicine》 2023年第6期239-240,共2页
In his 50 years of practice,he has performed more than 20,000 hepatopancreatobiliary surgeries,being the first one to propose the concept of the“auxiliary partial orthotopic liver transplantation”internationally.Fur... In his 50 years of practice,he has performed more than 20,000 hepatopancreatobiliary surgeries,being the first one to propose the concept of the“auxiliary partial orthotopic liver transplantation”internationally.Furthermore,he developed the“Chen's inserting biliary-enteric anastomosis and pancreato-enteric anastomosis,”“Chen's hepatic vascular occlusion,”“Chen's liver double-hanging maneuver,”and“Chen's hepatic vascular occlusion without liver portal dissection.”He also popularized these theories and techniques both in China and worldwide.His name is Xiao-Ping Chen,an academician of the Chinese Academy of Sciences and honorary president of the Tongji Medical College of Huazhong University of Science and Technology. 展开更多
关键词 hepato BILIARY lives
下载PDF
SAVING LIVES
11
《China Report ASEAN》 2020年第2期24-27,共4页
When the novel coronavirus(COVID-19)broke out,Chinese health workers were called to attention and started working overtime at their posts to save lives.It’s hard to tell much about the person behind goggles and a mas... When the novel coronavirus(COVID-19)broke out,Chinese health workers were called to attention and started working overtime at their posts to save lives.It’s hard to tell much about the person behind goggles and a mask,but it’s clear who they are fighting for. 展开更多
关键词 FIGHTING lives workers
下载PDF
THE LEGEND LIVES ON……
12
《China Today》 2002年第6期23-23,共1页
Enter the Grand View Garden Hotel in Beijing and take a step backin time, to the days of splendor described in the Legendary Chineseclassic A Dream of Red Mansions. This was an era of elegant archi-tecture, exquisite ... Enter the Grand View Garden Hotel in Beijing and take a step backin time, to the days of splendor described in the Legendary Chineseclassic A Dream of Red Mansions. This was an era of elegant archi-tecture, exquisite gardens, refined cuisine and gracious service. 展开更多
关键词 BE THE LEGEND lives ON
下载PDF
Effect of Family Planning on Women's Lives in China
13
作者 Gu Baochang Xie Zhenming Karen Hardee 《China Population Today》 1999年第3期10-16,共7页
I.BackgroundFertilityhasdeclinedprecipitouslyinChinaoverthepastthreedecades,sotherearegenerationsofChinesewomenalivetodaywhohavebeenaffectedverydifferentlybyfamilyplanning.China'stotalfertilityrate(TFR)fellfrommor... I.BackgroundFertilityhasdeclinedprecipitouslyinChinaoverthepastthreedecades,sotherearegenerationsofChinesewomenalivetodaywhohavebeenaffectedverydifferentlybyfamilyplanning.China'stotalfertilityrate(TFR)fellfrommorethansixchildreninthe1950stoaroundtwo... 展开更多
关键词 TFR Effect of Family Planning on Women’s lives in China
下载PDF
WTO Changes Lives in China
14
《China Today》 2002年第5期14-21,共8页
关键词 WTO Changes lives in China NPC
下载PDF
Yang Lizhou: Finding an Art World among Folk Lives
15
《China Today》 2001年第12期60-61,共2页
关键词 World Finding an Art World among Folk lives Yang Lizhou
下载PDF
Decisive Measures--China puts people’s lives and health first in the fight against COVID-19
16
作者 Shi Yan'an 《ChinAfrica》 2020年第4期28-29,共2页
While making progress in the battle against the novel coronavirus disease(COVID-19)at home,China and the Chinese people are being stigmatized in some parts of the world.Not only Chinese but Asians in general are being... While making progress in the battle against the novel coronavirus disease(COVID-19)at home,China and the Chinese people are being stigmatized in some parts of the world.Not only Chinese but Asians in general are being discriminated against,harassed and even physically assaulted in some countries. 展开更多
关键词 COV lives FIGHT
下载PDF
Changing Lives
17
《ChinAfrica》 2023年第10期24-26,共3页
Implementation of the BRI projects has heralded positive changes in the lives of Tanzanian people Tanzania is an important Belt and Road Initiative(BRI)hub in Africa.It signed a BRI cooperation memorandum with China i... Implementation of the BRI projects has heralded positive changes in the lives of Tanzanian people Tanzania is an important Belt and Road Initiative(BRI)hub in Africa.It signed a BRI cooperation memorandum with China in 2018.Bilateral exchanges have been on the rise since then.On the occasion of the 10th anniversary of the launch of the initiative,ChinAfrica sat down with Mbelwa Kairuki,Tanzanian ambassador to China,to hear his insights on the BRI,especially the changes brought by the BRI to the local people’s lives. 展开更多
关键词 AFRICA lives CHANGING
下载PDF
宜居宜业和美乡村建设水平评价与分类施策——以重庆市璧山区七塘镇为例 被引量:4
18
作者 周婷婷 廖和平 +3 位作者 李涛 朱琳 刘亭 谢传峰 《西南大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第3期15-27,共13页
“建设宜居宜业和美乡村”是党的二十大对全面推进乡村振兴作出的战略部署.在阐释宜居宜业和美乡村科学内涵的基础上构建评价指标体系,以璧山区七塘镇为例开展实证研究,探讨建设宜居宜业和美乡村的实施路径.结果表明:(1)七塘镇宜居宜业... “建设宜居宜业和美乡村”是党的二十大对全面推进乡村振兴作出的战略部署.在阐释宜居宜业和美乡村科学内涵的基础上构建评价指标体系,以璧山区七塘镇为例开展实证研究,探讨建设宜居宜业和美乡村的实施路径.结果表明:(1)七塘镇宜居宜业和美乡村建设水平呈现“北高南低”的空间分布格局,总体建设位于中等水平,不同维度水平有差距.(2)分维度看,七塘镇生活维度水平最高,治理、人文和环境维度水平其次,产业维度水平最低.(3)分村域看,将军村、喜观村建设水平较高,四合村、阳岫村建设水平中等,盐店村、跃进村、建设村和三步梯村建设水平较低.(4)依据优势与短板,将七塘镇8个村划分为综合发展型、主导发展型、极化发展型和欠缺发展型4类,针对性地提出各类乡村建设宜居宜业和美乡村的实施路径,以期为推进宜居宜业和美乡村建设提供理论与实践指导. 展开更多
关键词 乡村振兴 宜居宜业和美乡村 指标体系 实施路径
下载PDF
Determining Optimal Strategies to Reduce Maternal and Child Mortality in Rural Areas in Western China: an Assessment Using the Lives Saved Tool
19
作者 JIANG Zhen GUO Sufang +3 位作者 Robert W.SCHERPBIER WEN Chun Mei XU Xiao Chao GUO Yan 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2015年第8期606-610,共5页
China, as a whole, is about to meet the Millennium Development Goals for reducing the maternal mortality ratio (MMR) and infant mortality rate (IMR), but the disparities between rural area and urban area still exists.... China, as a whole, is about to meet the Millennium Development Goals for reducing the maternal mortality ratio (MMR) and infant mortality rate (IMR), but the disparities between rural area and urban area still exists. This study estimated the potential effectiveness of expanding coverage with high impact interventions using the Lives Saved Tool (LiST). It was found that gestational hypertension, antepartum and postpartum hemorrhage, preterm birth, neonatal asphyxia, and neonatal childhood pneumonia and diarrhea are still the major killers of mothers and children in rural area in China. It was estimated that 30% of deaths among 0-59 month old children and 25% of maternal deaths in 2008 could be prevented in 2015 if primary health care intervention coverage expanded to a feasible level. The LiST death cause framework, compared to data from the Maternal and Child Mortality Surveillance System, represents 60%-80% of neonatal deaths, 40%-50% of deaths in 1-59 month old children and 40%-60% of maternal deaths in rural areas of western China. 展开更多
关键词 rate Li an Assessment Using the lives Saved Tool Determining Optimal Strategies to Reduce Maternal and Child Mortality in Rural Areas in Western China
下载PDF
直播电商背景下国货品牌崛起的演化机制研究 被引量:4
20
作者 付淑换 李琪书 +1 位作者 顾惠 石岿然 《经济问题》 CSSCI 北大核心 2024年第4期68-75,共8页
借助直播平台优势,通过政府扶持,实现国货品牌崛起,在当前经济形势下成为大势所趋。考虑政府、直播电商平台和国货品牌方的有限理性,构建三方演化博弈模型,研究不同环境条件下各博弈主体的策略选择。分析结果表明:在直播电商行业发展的... 借助直播平台优势,通过政府扶持,实现国货品牌崛起,在当前经济形势下成为大势所趋。考虑政府、直播电商平台和国货品牌方的有限理性,构建三方演化博弈模型,研究不同环境条件下各博弈主体的策略选择。分析结果表明:在直播电商行业发展的不同阶段,直播电商平台和政府部门的策略选择不同,在直播电商行业发展初期,直播平台违规经营动机强烈,政府创新监管动力不足,国货品牌难以突破发展瓶颈;而在条件成熟时,政府和平台合力支持国货品牌发展,实现国货品牌崛起。 展开更多
关键词 直播电商平台 协同作用 国货品牌崛起 演化博弈
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部