检索结果-南通市图书馆

Inhibition of cathepsin B protects pancreatic acinar cells against apoptosis in early pancreatic trauma in rats

Emergency and Critical Care Medicine 2022年第1期2卷 7-11页

作者： Cong Feng Lili Wang jingyang peng Xiang Cui Xuan Zhou Department of Emergency First Medical Center of Chinese PLA General HospitalBeijingChina Department of General Medicine First Medical Center of Chinese PLA General HospitalBeijingChina Department of Radiology First Medical CenterGeneral Hospital of the PLABeijingChina Department of Orthopedics Fourth Medical CenterGeneral Hospital of the PLABeijingChina Department of Emergency Hainan Hospital of Chinese PLA General HospitalSanyaChina

Objectives:To observe the protective effect of cathepsin B inhibition against apoptosis of acinar cells in the early management of pancreatic contusion and laceration in rats,which would provide evidence of a potential early therapeutic for pancreatic contusion and ***:Twenty-four rats were assigned to 2 groups:1)Model(n=12)with an induced pancreatic injury of severity I-II and 2)CA074-V(n=12):an induced pancreatic injury,severity I-II treated with the cathepsin B inhibitor CA074-me(0.01mg/g)by intravenous administration through the caudal vein at 5minutes post model *** mice in these two groups were further randomly divided into 4 subgroups containing 3 rats each that were sacrificed for quantitation of apoptosis,immunohistochemistry of cathepsin B,and serum amylase and lipase measurements at different time points after model establishment(0,3,6,and 12hours).Results:The percentage of apoptotic pancreatic acinar cells collected from the injured tissues were much lower in the CA074-V group than the Model group at 3hours[9.25±3.94%vs.64.76±26.47%,P<0.10]and 6hours[14.71±8.22%vs.66.60±13.54%,P<0.10]post model *** percentage of cathepsin B-positive pancreatic acinar cells were much lower in the CA074-V group than in the Model group at 3hours[31.07±12.02%vs.69.16±5.71%,P<0.10],6hours[24.84±0.93%vs.47.06±0.91%,P<0.10],and 12hours[28.33±9.14%vs.52.72±1.25%,P<0.10]post model ***:Early cathepsin B inhibition effectively blocked acinar cell apoptosis in an experimental rat model of pancreatic contusion and laceration.

关键词： Acinar cell Apoptosis Cathepsin B inhibition Pancreatic contusion and laceration

来源：

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

A Survey of Modeling and Control of Piezoelectric Actuators

引用

Modern Mechanical Engineering 2013年第1期3卷 1-20页

作者： jingyang peng Xiongbiao Chen Department of Mechanical Engineering University of Saskatchewan Saskatoon Canada

Piezoelectric actuators (PEAs) have been widely used in micro- and nanopositioning applications due to their fine resolution, fast responses, and large actuating forces. However, the existence of nonlinearities such as hysteresis makes modeling and control of PEAs challenging. This paper reviews the recent achievements in modeling and control of piezoelectric actuators. Specifically, various methods for modeling linear and nonlinear behaviors of PEAs, including vibration dynamics, hysteresis, and creep, are examined;and the issues involved are identified. In the control of PEAs as applied to positioning, a review of various control schemes of both model-based and non-model-based is presented along with their limitations. The challenges associated with the control problem are also discussed. This paper is concluded with the emerging issues identified in modeling and control of PEAs for future research.

关键词： Piezoelectric Actuators Modeling Control

来源：

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

Modeling of Piezoelectric Actuators Based on a New Rate-Independent Hysteresis Model

引用

Modern Mechanical Engineering 2011年第2期1卷 25-30页

作者： jingyang peng Xiongbiao Chen 不详

Accurate model representatives of piezoelectric actuators (PEAs) are important for both understanding the dynamic behaviors of PEAs and control scheme development. However, among the existing models, the most widely used classical Preisach hysteresis model are incapable of representing the commonly-encountered one-sided (non-negative voltage input range) hysteresis behaviors of PEAs. To solve this problem, a new rate-independent hysteresis model was developed for the one-sided hysteresis and then integrated with the models representative of creep and dynamics to form a single model for the PEAs. Experiments were carried out to validate the developed models.

关键词： Piezoelectric Actuator Hysteresis

来源：

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

Theoretical studies of two-dimensional structure design and topological electronic properties of organic Dirac materials

ChemPhysMater

引用

ChemPhysMater 2024年第3期3卷 241-251页

作者： Aizhu Wang Wei Tan Hongbo Zhao Hongguang Wang Na Ren Longhua Ding Xin Yu jingyang peng Institute for Advanced Interdisciplinary Research University of JinanJinan 250022China Institute of Photonic Chips University of Shanghai for Science and TechnologyShanghai 200093China

Owing to the significant development in graphene,an increasing number of studies have been conducted to identify novel two-dimensional(2D)organic materials with Dirac cones and topological *** a series of toy models based on specific lattice patterns has been proposed and demonstrated to possess a Dirac cone,realistic materials corresponding to the lattice models must be identified to achieve excellent properties for practical *** understand factors contributing to the rarity of 2D organic Dirac materials and provide guidance for identifying novel organic Dirac systems,we review recent theoretical studies pertaining to various 2D Dirac models and their corresponding organic Dirac materials,including the Haldane,Kagome,Libe,linecentered honeycomb,and Cairo pentagonal ***,the corresponding structural and topological electronic properties are ***,we investigate the relationship between the existence of Dirac cones and their structural features,as well as the manner by which Dirac points emerge and propagate in these systems.

关键词： Two-dimensional Dirac models Organic Dirac materials Covalent-organic frameworks Metal-organic frameworks Topological electronic properties

来源：

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

Correlation Analysis between Well-cellar Early Transplanting of Robust Seedlings and Diseases in Shiyan Tobacco-growing Area

引用

Plant Diseases and Pests 2024年第4期15卷 21-24,36页

作者： Dingjun WANG Aihua LI Liguang CHAI Dan LIU Yixia LIU Minggang LI jingyang peng Hubei Tobacco Company Shiya Company Shiyan 442012China Shiyan Meteorological Bureau Shiyan 442012China

[Objectives]The paper was to investigate the relationship between the well-cellar early transplanting of robust seedlings and the prevalence of diseases in the Shiyan tobacco-growing area.[Methods]The relationship between disease occurrence and meteorological factors during the field growth period was examined by analyzing the prevalence of flue-cured tobacco virus diseases,brown spot,and total disease in the Shiyan tobacco-growing area before(2013-2017)and after(2018-2022)the well-cellar early transplanting of robust tobacco seedlings.[Results]The implementation of a well-cellar early transplanting technique of robust seedlings resulted in a reduction in the average incidence of tobacco virus disease,brown spot,and total disease by 0.83%,8.85%,and 7.91%,respectively,in comparison to the incidence observed prior to early *** findings suggest that early transplanting can significantly reduce the incidence of flue-cured tobacco *** to the well-cellar early transplanting of robust tobacco seedlings,there was a significant(including highly significant)positive correlation between the incidence of brown spot and total disease and precipitation in August and *** incidence of brown spot and total disease in tobacco plants was found to be significantly positively correlated with May precipitation and significantly negatively correlated with May sunshine hours following the well-cellar early transplanting of robust *** advancement of the transplanting period by 20 d resulted in a reduction in the growing period of tobacco plants in the field under autumn rains(late August to November)in western *** effectively circumvented the suitable conditions for disease occurrence and can reduce the incidence of disease.[Conclusions]This study offers a framework for enhancing the quality and efficiency of flue-cured tobacco production in the northwest tobacco-growing area of Hubei.

关键词： Tobacco disease Well-cellar early transplanting of robust seedlings Meteorological factor Correlation analysis Shiyan tobacco-growing area

来源：

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

改善涤纶针刺地毯防滑性的研究

引用

产业用纺织品 2010年第1期28卷 15-18页

作者：彭景洋刘亚天津工业大学纺织学院天津300160

针对针刺地毯在应用过程中防滑性不够的问题,通过与PVC板材的复合减少滑动性,并通过黏合剂的选择与合适的处理方法来增强产品的层间黏合强力,减少使用时的分层现象,以提高针刺地毯的防滑性。

关键词：针刺地毯防滑性黏合剂复合

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

历史地理视角下长安城曲江池的嬗变

引用

三门峡职业技术学院学报 2018年第2期17卷 25-31页

作者：彭静杨北京大学城市与环境学院历史地理研究中心北京100871

曲江池是具有上千年历史的重要文化景观,也是能够凸显当代西安城文化与个性的最佳名片。作为自然景观与文化景观和谐统一之景,曲江池体现着人地关系的动态平衡,对其进行研究无疑具有重要的现实意义。从历史地理学的视角对相关概念及曲... 详细信息

曲江池是具有上千年历史的重要文化景观,也是能够凸显当代西安城文化与个性的最佳名片。作为自然景观与文化景观和谐统一之景,曲江池体现着人地关系的动态平衡,对其进行研究无疑具有重要的现实意义。从历史地理学的视角对相关概念及曲江池的历史沿革进行梳理,同时分析了曲江池在历史时期重要的功能和价值,以期对当下如何更好地构建城市和谐的人地关系、彰显城市独特文化价值提供思路与建议。

关键词：曲江池长安城人地关系环境变迁文化景观

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

电子凸轮驱动多杆机构的轨迹规划方法研究

引用

机械传动 2016年第12期40卷 1-5页

作者：彭景阳王文格湖南大学机械与运载工程学院湖南长沙410082

采用多轴同步伺服驱动技术替代传统机械传动技术是复杂包装机械的一个发展趋势,针对包装过程中执行端高速往复的运动要求,提出了一种利用电子凸轮驱动多杆机构的设计方法。重点论述了电子凸轮的曲线规划方法,采用NURBS曲线方法建立凸轮... 详细信息

采用多轴同步伺服驱动技术替代传统机械传动技术是复杂包装机械的一个发展趋势,针对包装过程中执行端高速往复的运动要求,提出了一种利用电子凸轮驱动多杆机构的设计方法。重点论述了电子凸轮的曲线规划方法,采用NURBS曲线方法建立凸轮运动的数学模型,得到平滑的凸轮运动曲线。仿真及实验表明,采用NURBS曲线拟合方法满足速度、加速度以及多轴同步要求,保证推送运动平稳无冲击,同时提高输出柔性。

关键词：电子凸轮 NURBS曲线同步控制

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

明清至民国时期地方志所见的苏州茶与文化

引用

农业考古 2019年第5期 197-201页

作者：彭静杨北京大学城市与环境学院

苏州自古就是我国重要的茶产地之一,明清时期,更是我国茶叶生产和技术中心。明清至民国时期,苏州地区的方志数量繁多、记载系统,对茶的记录内容丰富、角度多样,这给我们研究苏州的茶与文化提供了丰富而宝贵的材料。从这些文献可以看到,... 详细信息

苏州自古就是我国重要的茶产地之一,明清时期,更是我国茶叶生产和技术中心。明清至民国时期,苏州地区的方志数量繁多、记载系统,对茶的记录内容丰富、角度多样,这给我们研究苏州的茶与文化提供了丰富而宝贵的材料。从这些文献可以看到,苏州茶具有如下特点:茶质较好、名茶辈出、种植广泛、产区集中、生产技术先进、茶叶贸易繁荣、好水配好茶、茶文化浓郁。此外,种茶也加重了百姓的负担。

关键词：茶茶文化苏州地方志明清至民国时期

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

北京最早的公立体育学校——北平市立体育专科学校

引用

兰台世界 2019年第12期 137-139页

作者：彭静杨北京大学城市与环境学院

1934年,以图强复兴、造就更多合格的体育师资为目的,北平市立体育专科学校正式创建,这是北京最早的公立体育学校。北平市立体育专科学校课程设置先进,体育设施完备。在1934—1952年不到20年的生命历程中,共培养了超过300名合格的体育师... 详细信息

1934年,以图强复兴、造就更多合格的体育师资为目的,北平市立体育专科学校正式创建,这是北京最早的公立体育学校。北平市立体育专科学校课程设置先进,体育设施完备。在1934—1952年不到20年的生命历程中,共培养了超过300名合格的体育师资人才,对北京乃至中国体育师资的培养和体育事业的发展都起到了深远的推动作用。

关键词：北京体育体育教育体育学校体育史

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：