检索结果-南通市图书馆

Characteristics of bone tunnel changes after anterior cruciate ligament reconstruction using Ligament Advanced Reinforcement System artificial ligament

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2012年第22期125卷 3961-3965页

作者： HUANG Jian-ming liu hao-yuan CHEN Feng-rong JIAN Guo-jian CHEN Qi WANG Zi-min KANG Yi-fan Second Mil Med Univ Shanghai Changhai Hosp Dept Orthoped Shanghai 200433 Peoples R China Xiamen Univ Chenggong Hosp Dept Orthoped Hosp Peoples Liberat Army 174 Xiamen 361003 Fujian Peoples R China

Background There are different materials used for anterior cruciate ligament （ACL） reconstruction. It has been reported that both autologous grafts and allografts used in ACL reconstruction can cause bone tunnel enlargement. This study aimed to observe the characteristics of bone tunnel changes and possible causative factors following ACL reconstruction using Ligament Advanced Reinforcement System （LARS） artificial ligament. Methods Forty-three patients underwent ACL reconstruction using LARS artificial ligament and were followed up for 3 years. X-ray and CT examinations were performed at 1,3, 6, 12, 24, and 36 months after surgery, to measure the width of tibial and femoral tunnels. Knee function was evaluated according to the Lysholm scoring system. The anterior and posterior stability of the knee was measured using the KT-1000 arthrometer. Results According to the Peyrache grading method, grade 1 femoral bone tunnel enlargement was observed in three cases six months after surgery. No grade 2 or grade 3 bone tunnel enlargement was found. The bone tunnel enlargement in the three cases was close to the articular surface with an average tunnel enlargement of （2.5＋0.3） mm. Forty cases were evaluated as grade 0. The average tibial and femoral tunnel enlargements at the last follow-up were （0.8＋0.3） and （1.1＋0.3） mm, respectively. There was no statistically significant difference in bone tunnel width changes at different time points （P 〉0.05）. X-ray and CT measurements were consistent. Conclusions There was no marked bone tunnel enlargement immediately following ACL reconstruction using LARS artificial ligament. Such enlargement may, however, result from varying grafting factors involving the LARS artificial ligament or from different fixation methods.

关键词： anterior cruciate ligament arthroscopy artificial ligament Ligament Advanced Reinforcement System

高温冻土区U型块石路基长期降温效果及变形特征研究

在线全文

学校读者我要写书评

暂无评论

岩土力学 2017年第11期38卷 3304-3310页

作者：刘明浩牛富俊林战举罗京中国科学院西北生态环境资源研究院冻土工程国家重点实验室甘肃兰州730000

U型块石路基作为块石护坡与块石基底两种结构路基的组合,同时也作为青藏铁路的一种主要补强措施,其在高温冻土区的长期降温效果备受关注。基于长期的现场监测资料,对青藏铁路楚玛尔河高温冻土区一处U型块石路基的长期降温过程、降温机... 详细信息

U型块石路基作为块石护坡与块石基底两种结构路基的组合,同时也作为青藏铁路的一种主要补强措施,其在高温冻土区的长期降温效果备受关注。基于长期的现场监测资料,对青藏铁路楚玛尔河高温冻土区一处U型块石路基的长期降温过程、降温机制以及变形特征进行了研究。结果表明:U型块石路基表现出持续稳定的降温效果,路基下部多年冻土上限附近降温明显,上限抬升迅速,且进入稳定状态。基底块石层底、顶板温差存在明显冷暖季差异。阴坡侧块石层每年1月至3月初为相对强烈自然对流期,阳坡侧相对缩短半个月时间。受工程热扰动影响,深层的多年冻土在经历2~3年升温过程后,呈现显著的降温过程。路基变形整体表现为较小的沉降量,变形主要来源于早期路基下部高温冻土层的压缩变形。总之,U型块石路基在高温冻土区表现出长期有效的降温效果,变形量有限且已趋于稳定,路基整体稳定性可以得到保证。

关键词： U型块石路基青藏铁路高温冻土降温效果路基变形

The role of axon guidance molecules in the pathogenesis of epilepsy

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第5期20卷 1244-1257页

作者： Zheng liu Chunhua Pan hao Huang Department of Neurology Affiliated Hospital of Zunyi Medical UniversityZunyiGuizhou ProvinceChina

Current treatments for epilepsy can only manage the symptoms of the condition but cannot alter the initial onset or halt the progression of the disease. Consequently, it is crucial to identify drugs that can target novel cellular and molecular mechanisms and mechanisms of action. Increasing evidence suggests that axon guidance molecules play a role in the structural and functional modifications of neural networks and that the dysregulation of these molecules is associated with epilepsy susceptibility. In this review, we discuss the essential role of axon guidance molecules in neuronal activity in patients with epilepsy as well as the impact of these molecules on synaptic plasticity and brain tissue remodeling. Furthermore, we examine the relationship between axon guidance molecules and neuroinflammation, as well as the structural changes in specific brain regions that contribute to the development of epilepsy. Ample evidence indicates that axon guidance molecules, including semaphorins and ephrins, play a fundamental role in guiding axon growth and the establishment of synaptic connections. Deviations in their expression or function can disrupt neuronal connections, ultimately leading to epileptic seizures. The remodeling of neural networks is a significant characteristic of epilepsy, with axon guidance molecules playing a role in the dynamic reorganization of neural circuits. This, in turn, affects synapse formation and elimination. Dysregulation of these molecules can upset the delicate balance between excitation and inhibition within a neural network, thereby increasing the risk of overexcitation and the development of epilepsy. Inflammatory signals can regulate the expression and function of axon guidance molecules, thus influencing axonal growth, axon orientation, and synaptic plasticity. The dysregulation of neuroinflammation can intensify neuronal dysfunction and contribute to the occurrence of epilepsy. This review delves into the mechanisms associated with

关键词： axon guidance drug-resistant epilepsy epilepsy nerve regeneration nervous system diseases neural pathways neuroinflammatory diseases neuronal plasticity neurons synaptic remodeling

在线全文

学校读者我要写书评

暂无评论

重庆市国有储备土地需求预测

经济地理 2007年第3期27卷 476-479,488页

作者：刘明皓邱道持西南大学资源和环境学院

土地供求分析是建立适度的土地储备规模,促进城市健康发展的必要条件。对储备用地的适度规模进行预测可以建立在经营性用地需求和经营性用地的供给分析基础上,文章首先对重庆市都市圈房地产用地的需求进行了分析;接着依据供给制约需求... 详细信息

土地供求分析是建立适度的土地储备规模,促进城市健康发展的必要条件。对储备用地的适度规模进行预测可以建立在经营性用地需求和经营性用地的供给分析基础上,文章首先对重庆市都市圈房地产用地的需求进行了分析;接着依据供给制约需求的原则,对重庆市都市圈城市用地的可供性进行了评价,在此基础上提出了土地储备适度规模的计算模型。最后,对储备用地供应计划制定及农用地转用指标分解方法进行了探讨。研究所探讨的建立土地适度储备规模的原理与方法对指导储备用地的需求预测、制定土地储备计划和农用地转用计划具有理论和实践指导价值。

关键词：土地储备需求分析适度规模居住用地

财政竞争、引资竞争与土地约束性指标管控政策执行偏差

在线全文

学校读者我要写书评

暂无评论

中国人口·资源与环境 2018年第5期28卷 123-131页

作者：张绍阳刘琼欧名豪南京农业大学公共管理学院江苏南京210095

约束性指标管控是我国土地管理领域的一项重要公共政策,但其实际执行过程却偏离原定政策目标。传统"央地纵向委托代理困境"视角的解释认为,地方政府追求土地财政和土地引资的动机是导致产生政策执行偏差的根源,但其忽略了地方政府行为... 详细信息

约束性指标管控是我国土地管理领域的一项重要公共政策,但其实际执行过程却偏离原定政策目标。传统"央地纵向委托代理困境"视角的解释认为,地方政府追求土地财政和土地引资的动机是导致产生政策执行偏差的根源,但其忽略了地方政府行为所具有的空间关联性而存在解释力不足的缺陷。为此,本文立足于地方政府横向竞争的视角,分析了地方政府间的财政竞争、引资竞争对土地约束性指标管控政策执行的影响;在此基础上,通过2010—2014年间的省级面板数据,构建空间杜宾模型对相应理论假说进行了检验。研究发现:(1)地方政府的土地财政、土地引资行为会加剧本地区的政策执行偏差程度。(2)地方政府间存在"相互模仿"的土地财政和土地引资竞争策略,这使其土地财政和土地引资行为会产生正向的空间溢出,即在加剧本地区政策执行偏差程度的同时,还会同步加剧相邻地区的政策执行偏差程度。(3)土地引资的直接效应和间接效应无论在范围上还是强度上都要强于土地财政,这表明地方政府间的土地引资竞争是导致政策执行偏差的更重要因素。本研究的政策启示在于,为了促进土地约束性指标管控政策的良好执行,不仅要通过财税体制改革来弱化地方政府间的土地财政竞争,更要通过政府绩效考核改革来遏制它们之间的土地引资竞争。

关键词：土地约束性指标执行偏差土地财政竞争土地引资竞争空间杜宾模型

如何控制中低强度粉煤灰泵送混凝土板面塑性收缩裂缝

在线全文

学校读者我要写书评

暂无评论

混凝土 2005年第5期 57-58,68页

作者：刘名好吴义明深圳市富通混凝土有限公司广东深圳518102

本文针对施工方都是初次使用预拌混凝土的特点,使用42.5R水泥配制中低强度粉煤灰泵送混凝土,如何从原材料、配合比、施工工艺、天气等因素入手,进行一系列的试验,找出了影响板面塑性收缩裂缝的主要因素。

关键词：中低强度粉煤灰泵送混凝土塑性收缩裂缝多次抹面天气

基于遗传算法的UPFC模糊阻尼控制器参数优化及与梯度下降法的比较

在线全文

学校读者我要写书评

暂无评论

电力自动化设备 2005年第11期25卷 5-10页

作者：刘皓明 MOKTK 李扬倪以信东南大学电气工程系香港大学电机电子工程系清华港大深圳电力系统研究所广东深圳518055

设计了一种统一潮流控制器(UPFC)模糊辅助控制器,能够阻尼互联系统之间功率低频振荡,分别使用遗传算法和梯度下降法实现了模糊阻尼控制器(FDC)的参数优化。建立了UPFC的频域模型,给出了主控制和辅助控制的框图,推导了模糊阻尼控制器参... 详细信息

设计了一种统一潮流控制器(UPFC)模糊辅助控制器,能够阻尼互联系统之间功率低频振荡,分别使用遗传算法和梯度下降法实现了模糊阻尼控制器(FDC)的参数优化。建立了UPFC的频域模型,给出了主控制和辅助控制的框图,推导了模糊阻尼控制器参数优化的公式。互联多机系统算例显示了2种优化方法都具有很好的收敛性,且结果吻合,同时由这2种方法优化的阻尼控制器能够很好地阻尼系统的功率振荡,且比传统的基于线性系统设计的辅助控制器在不同的系统运行方式和振荡模式下具有更好的鲁棒性。

关键词：统一潮流控制器辅助控制器模糊逻辑梯度下降法遗传算法

Return to work in young and middle-aged colorectal cancer survivors:Factors influencing self-efficacy,fear,resilience,and financial toxicity

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2025年第1期31卷 79-92页

作者： Dan Hu Yue Li Hua Zhang Lian-Lian Wang Wen-Wen liu Xin Yang ming-Zhao Xiao hao-Ling Zhang Juan Li Department of Nursing The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Nursing National Clinical Research Center for Child Health and DisordersMinistry of Education Key Laboratory of Child Development and DisordersChildren’s Hospital of Chongqing Medical UniversityChongqing 400014China Department of Gastrointestinal Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Biomedical Science Advanced Medical and Dental InstituteUniversity Sains MalaysiaPenang 13200Malaysia Academic Affairs Office The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China

BACKGROUND Return to work(RTW)serves as an indication for young and middle-aged colorectal cancer(CRC)survivors to resume their normal social ***,these survivors encounter significant challenges during their RTW ***,scientific research is necessary to explore the barriers and facilitating factors of returning to work for young and middle-aged CRC *** To examine the current RTW status among young and middle-aged CRC survivors and to analyze the impact of RTW self-efficacy(RTW-SE),fear of progression(FoP),eHealth literacy(eHL),family resilience(FR),and financial toxicity(FT)on their RTW *** A cross-sectional investigation was adopted in this *** September 2022 to February 2023,a total of 209 participants were recruited through a convenience sampling method from the gastrointestinal surgery department of a class A tertiary hospital in *** investigation utilized a general information questionnaire alongside scales assessing RTW-SE,FoP,eHL,FR,and *** analyze the factors that influence RTW outcomes among young and middle-aged CRC survivors,Cox regression modeling and Kaplan-Meier survival analysis were *** A total of 43.54%of the participants successfully returned to work,with an average RTW time of 100 *** regression univariate analysis revealed that RTW-SE,FoP,eHL,FR,and FT were significantly different between the non-RTW and RTW groups(P<0.05).Furthermore,Cox regression multivariate analysis identified per capita family monthly income,job type,RTW-SE,and FR as independent influencing factors for RTW(P<0.05).CONCLUSION The RTW rate requires further *** levels of RTW-SE and FR were found to significantly increase RTW among young and middle-aged CRC *** professionals should focus on modifiable factors,such as RTW-SE and FR,to design targeted RTW support programs,thereby facilitating their timely reintegration into mainstream society.

关键词： Return to work Colorectal neoplasms Return-to-work self-efficacy Fear of progression Family resilience Financial toxicity

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

配电网故障区间判断的通用矩阵算法

电力系统保护与控制 2009年第5期37卷 14-17页

作者：马强张利民刘皓明河海大学电气工程学院江苏南京210098

根据配电网的各种故障情况提出了一种分区分层判断故障的通用矩阵算法。首先采用分区的思想以常开型联络开关为界将配电网络分成许多小区,根据故障信息粗略判断出发生故障的小区。充分利用配电网的结构特点,在馈线终端单元(FTU)装置中... 详细信息

根据配电网的各种故障情况提出了一种分区分层判断故障的通用矩阵算法。首先采用分区的思想以常开型联络开关为界将配电网络分成许多小区,根据故障信息粗略判断出发生故障的小区。充分利用配电网的结构特点,在馈线终端单元(FTU)装置中设置三种工作模式。针对发生故障的小区形成网络描述矩阵,根据不同工作模式下的故障信息对网络描述矩阵进行修正形成故障判断矩阵,根据故障判断矩阵中的元素特征就可判断故障发生区间。此算法能够解决像馈线末端故障、环网故障、多电源环网多重故障这些在其它算法中不能全部解决的问题,而且计算量小。

关键词：配电网络馈线自动化故障定位故障小区故障判断矩阵