检索结果-南通市图书馆

Genetic diversity and population structure of invasive and native populations of Erigeron canadensis L.

Journal of Plant Ecology 2022年第4期15卷 864-876页

作者： Saurav Bhattacharya Fernando Hernández Mariana Ferreira Alves Raquel Moura Machado Yan-Yan Sun Meng-Ru Wang Chao-Bin Zhang jian-hua hao School of Biology and Food Engineering Changshu Institute of TechnologyChangshu 215500China Departamento de Agronomía Universidad Nacional del Sur(UNS)Bahía BlancaArgentina Departamento de Biologia Vegetal Instituto de BiologiaUniversidade Estadual de CampinasSão PauloBrazil Agriculture Information and Economy Institute Shandong Academy of Agricultural SciencesJinan 250100China

Invasive alien plants threaten biodiversity across the *** canadensis(horseweed)is one of the most problematic agricultural weeds and represents a classic example of intercontinental ***,we studied the genetic diversity and population structure of invasive alien populations from the jiangsu and Zhejiang Provinces in China and native populations from Alabama,in the *** used 10 polymorphic SSR loci to genotype 312 individuals from 5 native and 5 invasive populations to estimate the genetic diversity and *** populations from jiangsu and Zhejiang Provinces showed,on average,similar genetic diversity to native populations from Alabama,indicating no severe genetic bottlenecks during the *** revealed that low population differentiation occurred,and that only two genetic groupings were detected in both native and invaded *** high diversity observed in the invasive populations suggested multiple introductions and/or the introduction of genetically diverse propagules during initial *** study provides new insights toward understanding the invasion dynamics of this globally noxious weed in Eastern *** gene flow via seed dispersal between invasive and native populations should be examined to prevent the introduction and dispersal of herbicide-resistant individuals and inform management practices.

关键词： gene flow genetic diversity invasive alien plant introduced population native population

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

Teaching Reform and Practice in Engineering Drawing Based on 3D Modeling with Computer

引用

Computer Aided Drafting,Design and Manufacturing 2011年第1期21卷 46-51页

作者： WANG jian-hua hao Yu-xin College of Mechanical Engineering and Applied Electronics Technology Beijing Information Science and Technology University Beijing 100192 China

Based on the necessity of three dimensional modeling with computer in teaching reform, this paper is the summarization of reform practice of teaching engineering drawing in our institute. The teaching reform begins with three dimensional modeling that used computer instead of board. On the basis of target of teaching reform, set of teaching content, arrangement of class hour and teaching method, the research of teaching practice have been done, and very good effects in teaching of engineering drawing have been achieved.

关键词： engineering graphics three dimensional modeling engineering drawing teaching reform and practice

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

Dorsalis pedis arterialized venous flap for hand and foot reconstruction

引用

Chinese Journal of Traumatology 2012年第1期15卷 32-35页

作者： YUGuang LEIHong-yu GUOShuang huaNG jian-hua YU hao Department of Hand and Foot Surgery Kangyi Hospital of Guyong Dongguan 523047 Guangdong ProvinceChina

Objective：To report the results of repair of skin defects in the extremities with arterialized venous flap harvested from the lateral aspect of the dorsum of the ***：Six cases of skin and soft tissue defects over the foot and hands were resurfaced by free arterialized venous flaps,including five patients with skin defects of the hands,and one with defects at the dorsum of the *** flaps were harvested from the lateral aspect of the dorsum of the foot with the sizes ranging from 2 cm×5.5 cm to 6 cm×11 *** veins at the proximal margin of the flap were retained,one of which was anastomosed to a recipient bed artery to provide arterial inflow and the other was anastomosed to a recipient bed vein for venous ***：All flaps demonstrated mild edema and survived *** appeared on four *** this technique,we achieved good functional and cosmetic results in this ***：Dorsalis pedis arterialized venous flap with rich vascular communications could enhance peripheral perfusion and decrease congestion of venous flaps,thereby improves reliability and utility for extremity reconstruction.

关键词： Surgical flaps Reconstructive surgicalprocedures Hand Foot

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

A new method to accurately measure the drift of shipborne floated gyro

引用

Journal of Marine Science and Application 2006年第2期5卷 1-5页

作者： CHENG jian-hua hao Yan-ling huaNG Wei-quan WU Lei SHAN Dan-ping College of Automation Harbin Engineering University Harbin 150001 China

Shell-feeding velocity is an important factor affecting naval gun shooting capacity. An agile shell-feeding system was designed to ensure quick implementation of the shell-feeding task. Based on composition of the agile shell-feeding system, hoist technology was studied. Working principles were discussed and the hydraulic pressure system of the hoist was constructed. The hydraulic pressure cylinder and the accumulator were analyzed and calculated. Finally, PRO/E and ADAMS were used to simulate the hoist and its hydraulic system. It was found that this type of virtuaU674.7l prototype provides a good method to actualize a physical prototype.

关键词： shell-feeding system naval gun hoist accumulator

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

基于扰动状态概念模型的饱和软粘土力学特性

引用

上海交通大学学报 2004年第6期38卷 952-955页

作者：陈锦剑吴刚王建华郝佳上海交通大学土木工程系上海200030

基于扰动状态概念(DSC)理论,定义饱和软粘土的相对完整状态、完全调整状态及扰动函数,建立了饱和软粘土应力—应变关系的DSC模型.通过三轴固结不排水剪切试验,对上海地区典型软粘土的力学特性进行了分析,得到了软粘土在不同围压下的轴... 详细信息

基于扰动状态概念(DSC)理论,定义饱和软粘土的相对完整状态、完全调整状态及扰动函数,建立了饱和软粘土应力—应变关系的DSC模型.通过三轴固结不排水剪切试验,对上海地区典型软粘土的力学特性进行了分析,得到了软粘土在不同围压下的轴向应力、应变和孔压等参数之间的关系,并应用试验结果验证了饱和软粘土的DSC本构模型.结果表明,理论与试验结果较为吻合.

关键词：粘土性土力学特性扰动状态概念本构模型三轴剪切试验

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

Clinicopathological differences between patients with schistosomal appendicitis and non schistosomal appendicitis:A retrospectively study of past ten years

引用

World Journal of Clinical Cases 2025年第2期13卷 24-32页

作者： Xiao-Yi Wang Yao hao Zi-jian Wang Xiu-Liang Xu jiang-hua Yang Department of Infectious Diseases The First Affiliated of Wannan Medical CollegeWuhu 241001Anhui ProvinceChina

BACKGROUND Chronic schistosomiasis causes multiple organ and multiple system diseases,especially the digestive *** eggs are mainly deposited in the stomach,liver and colorectal,but a few eggs are deposited in the appendix and cause *** present,there are few studies on schistosomal *** To explore the differences in epidemiological,clinical and pathological characteristics between schistosomal appendicitis and non-schistosomal appendicitis over the past decade in order to assess the impact of schistosomiasis on *** The differences of general data,clinical data and laboratory examination data of patients with appendicitis from October 2013 to October 2023 were retrospectively *** patients were divided into two groups for *** were 136 patients in schistosomal appendicitis group and 5418 patients in non-schistosomal appendicitis *** Schistosomal appendicitis accounted for 2.45%of all patients with appendicitis,and the annual proportion in the past decade was 2.2%,2.9%,1.8%,1.9%,3.4%,3.1%,1.9%,1.6%,3%,2.6%,*** prevalence of schistosomal appendicitis was middle-aged and elderly males,with an average age of 61.73±15.335 *** main population of non-schistosomal appendicitis was middle-aged men,with an average age of 35.8±24.013 years(P<0.001).The distribution of pathological types of appendicitis was different between the two groups(P<0.001).The incidence of acute suppurative appendicitis in non-schistosomal appendicitis was higher than that in schistosomal appendicitis[odds ratio(OR)=0.504;95%confidence interval(CI):0.349-0.728;P<0.001].The proportion of acute attack of chronic appendicitis in schistosomal appendicitis was higher than that in non-schistosomal appendicitis(OR=2.614;95%CI:1.815-3.763;P<0.001).The proportion of schistosomal appendicitis patients complicated with colorectal cancer was higher than that of nonschistosomal appendicitis patients(OR=5.087;95%CI:1.427-

关键词： Schistosomal appendicitis Schistosomiasis Appendix Colorectal cancer Clinicopathological characteristics

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

Effect of DPC4 Gene on Invasion and Metastasis of Colorectal Carcinoma Cells

引用

Acta Biochimica et Biophysica Sinica 2006年第12期38卷 883-892页

作者： De-Sheng XIAO Ji-Fang WEN* Jing-He LI Kuan-Song WANG Zhong-Liang HU jian-hua ZHOU Zheng-hao DENG Ying LIU Department of Pathology,Xiangya School of Medicine,Central South University,Changsha 410078,China DepartmentofPathology XiangyaSchoolofMedicineCentralSouthUniversityChangsha410078China

To investigate the effect of DPC4 gene on invasion and metastasis of colorectal carcinomacells,the expression of DPC4 was detected in sixty-three samples of colorectal tumors and seven cases ofcolorectal *** biological behavior of tumors expressing DPC4 was evaluated (including tumorstaging,differentiation degree and metastasis).pcDNA3.1-DPC4 plasmid was constructed and transferredinto HCT116 cells not expressing *** cell models (DPC4~+-HCT116) steadily expressing DPC4 *** with HCT116 and pcDNA3.1-HCT116 cells,the doubling time of DPC4~+-HCT116 cellswas lengthened obviously (P<0.01),the apoptosis rate of DPC4~+-HCT 116 cells was significantly increased(P<0.01),the cloning efficiency,cell adherency,migration and invasion ability of DPC4~+-HCT116 cells weredropped obviously (P<0.01).The number of cancer nodules was decreased significantly in abdominal cavityand liver of the nude mice inoculated with DPC4~+-HCT116 *** activity of MMP-9 and MMP-2 wasdetected by gelatin *** comparison with HCT116 and pcDNA3.1-HCT116 cells,the activity ofMMP-9 was decreased in DPC4~+-HCT116 ***,the down-regulation of DPC4 expression may beassociated with the carcinogenesis of colorectal ***4 may inhibit the proliferation of coloncancer cell by restraining growth and inducing apoptosis,and the invasion and metastasis of colorectalcarcinoma ***-9 may be one of the downstream target genes regulated by DPC4.

关键词： DPC4 colorectal carcinoma invasion metastasis MMP9

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Diagnosis and treatment of herpangina:Chinese expert consensus

引用

World Journal of Pediatrics 2020年第2期16卷 129-134页

作者： Hui Yu Xing-Wang Li Quan-Bo Liu Hui-Ling Deng Gang Liu Rong-Meng jiang Ji-Kui Deng Ying-Zi Ye jian-hua hao Ying-Hu Chen Guang-Min Nong Zhao-Bo Shen Chang-Shan Liu Ying-Xue Zou Jin-Zhun Wu Xing-Dong Wu Bi-Quan Chen Ru-Ping Luo Ai-Wei Lin Yan Chen Xiao-Dong Liu Department of Infectious Diseases Children's Hospital of Fudan UniversityShanghaiChina Infectious Disease Diagnosis and Treatment Center Beijing Ditan Hospital Capital Medical UniversityBeijingChina Department of Infectious Diseases Children's Hospital of Chongqing Medical UniversityChongqingChina Department of Infectious Diseases The Children's Hospital of Xi'anXi'anChina Department of Infectious Diseases Beijing Children's HospitalCapital Medical UniversityBeijingChina Department of Infectious Diseases Shenzhen Children's HospitalShenzhenChina Department of Internal Medicine Children's Hospital of Kaifeng CityKaifengChina Department of Infectious Diseases The Children's Hospital-Zhejiang University School of MedicineHangzhouChina Department of Pediatrics The First Affiliated Hospital of Guangxi Medical UniversityGuangxiChina Pneumology Department Henan Children's HospitalHenanChina Department of Pediatrics The Second Hospital of Tianjin Medical UniversityTianjinChina Department of Infectious Diseases Tianjin Children's HospitalTianjinChina Department of Pediatric Pneumology The First Affiliated Hospital of Xiamen UniversityXiamenChina Department of Pediatrics Xiamen Maternal and Child Health Care HospitalXiamenChina Department of Infectious Diseases Anhui Provincial Children's HospitalHefeiChina Department of Infectious Diseases Hunan Children's HospitalHunanChina Department of Infectious Diseases Qilu Children's Hospital of Shandong UniversityShandongChina Department of Pediatrics Internal Medicine Affiliated Hospital of Zunyi Medical UniversityZunyiChina

Background Herpangina is a common infectious disease in childhood caused by an *** consensus is aiming to standardize and improve herpangina prevention and clinical *** The Subspecialty Group of Infectious Diseases,the Society of Pediatric,Chinese Medical Association and Nation Medical Quality Control Center for Infectious Diseases gathered 20 experts to develop the consensus,who are specialized in diagnosis and treatment of *** The main pathogenic serotypes of herpangina include Coxsackievirus-A,Enterovirus-A and *** diagnosis can be rendered on the basis of history of epidemiology,typical symptoms,characteristic pharyngeal damage and virological *** treatment is mainly symptomatic,and incorporates topical oral spray with antiviral *** course of herpangina generally lasts 4-6 days with a good *** The consensus could provide advices and references for the diagnosis,treatment and management of herpangina in children.

关键词： Herpangina Diagnosis Treatment Consensus

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

浅析城域光传输网络的规划和设计

引用

光通信技术 2005年第4期29卷 51-53页

作者：付明磊华剑浩乐孜纯浙江工业大学信息工程学院杭州310032

介绍了城域光传输网络的基本概念和组网结构,归纳了浙江省城域光传输网的建设现状。以此为基础,简要地总结了城域光传输网从环状网络向网状网络的演进趋势以及城域光网建设的规划原则。

关键词：城域光网 SDH 环状网络网状网络组网规划原则

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

WDM网状网中基于光连接抗毁业务量疏导保护算法

引用

光通信技术 2006年第8期30卷 12-15页

作者：华剑浩乐孜纯付明磊浙江工业大学信息工程学院杭州310032

研究了WDM网状网中基于光连接(connec-tion)的抗毁业务量疏导通道(path)保护问题,以最大化网络的吞吐量为目标,提出了新的基于共享风险链路组(SharedRiskLinkGroup,SRLG)的共享保护算法和专用保护算法。并以NSFNET为仿真网络,比较说明... 详细信息

研究了WDM网状网中基于光连接(connec-tion)的抗毁业务量疏导通道(path)保护问题,以最大化网络的吞吐量为目标,提出了新的基于共享风险链路组(SharedRiskLinkGroup,SRLG)的共享保护算法和专用保护算法。并以NSFNET为仿真网络,比较说明了这两种算法在网络拥塞率和波长利用率方面的性能优劣。

关键词：波分复用抗毁业务量疏导共享风险链路组共享保护专用保护

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：