检索结果-南通市图书馆

Diagnosis and Management of 60 Children with Congenital Vascular Rings： A 10-year Experience

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2015年第12期128卷 1689-1692页

作者： Guo-Qing Fang jing Li Feng Xu Yue-Qiang fu Ying-fu Chen Xiao-Juan Ji He-Lin Zheng Si-Si Chen Department of PICU Children's Hospital of Chongqing Medical University Chongqing 400014 China Department of Pediatrics The Ninth People's Hospital of Chongqing Chongqing 400700 China Department of Cardiology Children's Hospital of Chongqing Medical University Chongqing 400014 China Department of Radiology Children's Hospital of Chongqing Medical University Chongqing 400014 China Department of Respiratory Children's Hospital of Chongqing Medical University Chongqing 400014 China

INTRODUCTION Congenital vascular rings （VRs） are a group of rare cardiovascular anomalies that result from abnormal embryonic development of the paired aortic arches or branching pulmonary arteries. Clinical present... 详细信息

关键词： Airway Constriction Congenital Heart Disease Vascular Rings

Probing the fractional topological charge of a vortex light beam by using dynamic angular double slits

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2016年第5期4卷 187-190页

作者： jing Zhu Pei Zhang Dongzhi fu Dongxu Chen Ruifeng Liu Yingnan Zhou Hong Gao fuli Li Laboratory of Quantum Information and Quantum Optoelectronic Devices Shaanxi ProvinceXian Jiaotong University Key Laboratory of Quantum Information University of Science and Technology of ChinaChinese Academy of Science

Vortex beams with fractional topological charge(FTC) have many special characteristics and novel ***, one of the obstacles for their application is the difficulty of precisely determining the FTC of fractional vortex beams. We find that when a vortex beam with an FTC illuminates a dynamic angular double slit(ADS), the far-field interference patterns that include the information of the FTC of the beam at the angular bisector direction of the ADS vary periodically. Based on this property, a simple dynamic ADS device and data fitting method can be used to precisely measure the FTC of a vortex light beam with an error of less than 5%.

关键词： Probing the fractional topological charge of a vortex light beam by using dynamic angular double slits

在线全文

学校读者我要写书评

暂无评论

陕西地区花椒主要病害的生防菌筛选与鉴定

干旱地区农业研究 2024年第2期42卷 222-230,244页

作者：符晓丁俊园焦嘉卉钟思雨孙孟娇付家佳唐光辉李培琴西北农林科技大学林学院/西部森林生物灾害治理国家林业和草原局重点实验室陕西杨凌712100

为开发针对陕西地区花椒主要病害的生防菌资源,对陕西省宝鸡市凤县花椒根际土壤微生物进行分离培养,并测定了其对花椒的4种靶标病原菌,即干腐病菌(fusarium zanthoxyli)、黑胫病菌(Phytophthora citrophthora)、根腐病菌(***)和落叶病菌... 详细信息

为开发针对陕西地区花椒主要病害的生防菌资源,对陕西省宝鸡市凤县花椒根际土壤微生物进行分离培养,并测定了其对花椒的4种靶标病原菌,即干腐病菌(fusarium zanthoxyli)、黑胫病菌(Phytophthora citrophthora)、根腐病菌(***)和落叶病菌(Marssonina sp.)的抑菌活性。结果显示:从花椒根际土壤中共分离到297个微生物菌株,其中105个为真菌,192个为细菌。通过初筛,获得了20个对3种及以上靶标病原菌均具有显著拮抗作用的细菌菌株,经形态学和16S rDNA序列分析,将其中7个鉴定为贝莱斯芽孢杆菌(Bacillus velezensis),5个鉴定为解淀粉芽孢杆菌(***),3个鉴定为伯克霍尔德氏菌属(Burkholderia)的不同种,2个鉴定为安徽黄杆菌(Flavobacterium anhuiense),3个为其他种。经复筛和验证,发现贝莱斯芽孢杆菌P87的生防潜力最强,可以作为花椒病害生物防治的备选菌种。

关键词：花椒根际土壤生防菌筛选鉴定抑菌活性

在线全文

学校读者我要写书评

暂无评论

中国主栽葡萄芽变品种及其性状特点

落叶果树 2024年第1期56卷 43-46页

作者：刘文徐文清付广清上官凌飞房经贵南京农业大学园艺学院/江苏省果树品种改良与种苗繁育工程中心江苏南京210095 江苏省农业农村厅农技推广站江苏南京210036 江苏农业科学院园艺所江苏南京210014

芽变选种是一种简便易行、经济有效、周期短和进程快的育种方法。中国通过芽变选种选育的葡萄品种较多,对夏黑、巨峰等主栽品种的芽变品种及其性状表现进行了总结分析。

关键词：葡萄主栽品种芽变芽变性状

维普期刊数据库博看期刊

The microstructural evolution and wear properties of Ni60/high-aluminum bronze composite coatings with directional structure

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第4期40卷 952-960页

作者： Xiao-Tian Yang Xiu-Qian Li Qiang-Bin Yang Jun-Ling Duan Xiao-Yue fu Heng-Li Wei wen-Sheng Li College of Materials Science and Engineering State Key Laboratory of Advanced Processing and Recycling of Nonferrous MetalsLanzhou University of TechnologyLanzhou 730050China wenzhou Engineering Institute of Pump&Valve Lanzhou University of TechnologyWenzhou 325105China Chongqing Key Laboratory of Environmental Materials&Remediation Technologies College of Chemistry&Environmental EngineeringChongqing University of Arts and SciencesChongqing 402160China Department of Material and Chemical Engineering College of Technology and EngineeringLanzhou University of TechnologyLanzhou 730050China

The directional structure of Ni60/high-aluminum bronze composite coating was formed using induction remelting and forced *** microstructural evolution and the characteristics of interface growth were *** results showed that the remelted coating formed metallurgical bonding with the *** micros tructures changed from plane crystal to dendrite,cellular dendrite,fine cellular dendrite,and then to dendrite again with the increase in the cooling *** crystal grew along the heat flow direction and had(111) and(200)preferred orientations when the cooling rate was 1.886 ml-min^(-1).mm^(-2).The plane crystal,dendrite and cellular dendrite were mainly composed of compounds and solid solutions with Ni,Fe and Cu,and they were surrounded by strengthening phases composed of Cr,C and *** grain boundary of directional structure coatings showed the characteristic of regular eutectic growth,but grain boundary of remelted coating presented characteristic of divorced eutectic *** wear resistance of directional structure coatings is better than that of remelted coating.

关键词： Aluminum bronze composite coating Induction remelting Directional structure Grain boundaries Preferred orientation

在线全文

学校读者我要写书评

暂无评论

建筑消防电气工程施工质量控制研究

现代工程科技 2024年第18期3卷 125-128页

作者：付国猛深圳市南油消防安全工程有限公司广东深圳518000

对于现代建筑来说,消防电气工程的建设极为重要,其施工质量更是决定了消防电气工程的功能效果与使用寿命。简述了建筑消防电气工程的施工质量控制原则,分析了施工质量控制难点,指出了常见的施工质量控制问题,从准备、制度、人员、设备... 详细信息

对于现代建筑来说,消防电气工程的建设极为重要,其施工质量更是决定了消防电气工程的功能效果与使用寿命。简述了建筑消防电气工程的施工质量控制原则,分析了施工质量控制难点,指出了常见的施工质量控制问题,从准备、制度、人员、设备、环境、调试、竣工等角度出发,阐述了施工质量控制要点,并提出了几点施工质量控制建议措施。从施工质量控制效果来看,通过细化建筑消防电气工程施工要点并落实质量强化措施,进一步提高了建筑消防电气工程的施工质量,有效保证了其使用期间的功能效果。

关键词：建筑消防电气工程施工质量控制

Research on the Influence of Equity Structure on Corporate Performance

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

Proceedings of Business and Economic Studies 2024年第1期7卷 127-132页

作者： Limei fu Hainan Vocational University of Science and Technology Haikou 571126Hainan ProvinceChina

Equity structure constitutes a crucial component of corporate internal governance.A scientifically and reasonably structured equity system aids in enhancing the level and efficiency of corporate *** empirical analysis of data spanning from 2013 to 2022,the study aims to verify the influence mechanism of equity structure on corporate *** results indicate that enhancing equity concentration and balance positively impacts corporate performance,with this effect persisting over ***,optimizing the degree of equity concentration,shareholder types,and the board of directors’structure can assist enterprises in maximizing long-term value.

关键词： Equity structure Corporate performance Corporate governance

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

虚拟现实技术在旅游业中的应用研究

承德石油高等专科学校学报 2024年第2期26卷 78-80页

作者：柴赋河北省承德避暑山庄博物院河北承德067000

综述了虚拟旅游、跨越时空限制的旅游、虚拟开发、保护旅游资源等的需要、文物的展示、旅游规划、旅游营销与宣传、旅游区域影响评价等方面虚拟现实技术在旅游业中的应用。

关键词：虚拟现实技术虚拟旅游旅游规划

Improving microstructure and mechanical properties of Ti43Al5Nb0.1B alloy by addition of Fe

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2019年第11期38卷 1024-1032页

作者： Yong Yang Rui-Run Chen Hong-Ze Fang jing-Jie Guo Hong-Sheng Ding Yan-Qing Su Heng-Zhi fu School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Department of Materials Engineering Baotou Vocational&Technical CollegeBaotou 014030China

Alloying additions of 0 at%-1.1 at% Fe were added into Ti43A1Nb0.1B alloys for increasing the roomtemperature strength and ductility,and the microstructure and mechanical properties were systematically *** results show that the lattice tetragonality(c/a) of γ phase and the average width of columnar grains of alloys decrease with Fe content *** addition brings about the formation of Fe-rich B2 phase both in the dendrites and in interdendritic regions,and its content increases with Fe contents ***,Fe addition aggravates the Al segregations in the interdendritic *** alloy with 0.7 at% Fe exhibits higher combined mechanical properties with the ultimate compression strength and fracture strain of 1958.4 MPa and 29.8%,*** grain refinement strengthening and solid-solution strengthening of Fe are responsible for the improvement in the strength and the ***,excessive Fe addition results in the decrease in the strength and strain,which is attributed to the severe A1 segregations in the interdendritic regions that cause the premature fracture during compression.

关键词： TiAl Fe B2 phase Microstructure Mechanical properties