检索结果-南通市图书馆

北京市麻醉科住院医师规范化培训临床实践能力结业考核成绩与考生自评成绩比较分析

在线全文

学校读者我要写书评

暂无评论

中华医学教育杂志 2024年第6期44卷 467-470页

作者：霍飞鞠辉冯艺常连芳北京大学人民医院麻醉科北京100044 北京市卫生健康人力资源发展中心北京100034

目的对北京市麻醉科住院医师规范化培训(简称住培)临床实践能力考核成绩与住院医师自评成绩进行比较,探讨住培过程中的问题。方法采用全样本调查方法,以2022年6月参加北京市住培临床实践能力结业考核的193名麻醉科住院医师为研究对象,... 详细信息

目的对北京市麻醉科住院医师规范化培训(简称住培)临床实践能力考核成绩与住院医师自评成绩进行比较,探讨住培过程中的问题。方法采用全样本调查方法,以2022年6月参加北京市住培临床实践能力结业考核的193名麻醉科住院医师为研究对象,以其操作考核视频和考核成绩为资料来源,并通过问卷调查获取考生对麻醉操作考核的自评成绩。采用t检验或配对t检验比较考生的自评成绩和考核成绩。结果考生的腰麻操作自评成绩与考核成绩差异无统计学意义[(28.39±1.32)分比(28.26±1.32)分,P=0.317];考生在动脉穿刺置管、气管插管、中心静脉置管、心肺复苏和电除颤等方面的自评成绩均高于考核成绩[(28.99±1.32)分比(27.95±1.33)分,(29.06±1.30)分比(28.28±1.29)分,(29.07±1.30)分比(28.37±1.35)分,(59.44±1.95)分比(57.78±1.42)分,均P<0.05]。其中,考生在操作规范、无菌操作、模拟器相关、非技能操作相关的自我评分均高于考核成绩[如:确定气管插管位置并固定:(1.93±0.19)分比(1.75±0.29)分;腰麻操作过程中的无菌原则:(1.98±0.13)分比(1.86±0.27)分;穿中血管后判断是否为中心静脉:(2.94±0.24)分比(2.66±0.70)分;在电除颤后清洁患者皮肤,清洁电极板并归位:(1.85±0.33)分比(0.98±0.94)分,均P<0.05]。结论麻醉科住院医师在动脉穿刺置管、气管插管、中心静脉置管、心肺复苏和电除颤等方面的自我认知存在偏差,在技能培训中,住院医师需加强临床操作规范、无菌原则的学习,强化其非操作技能的培养。

关键词：麻醉住院医师规范化培训临床实践能力考核差异性评分

Method for calculating non-point source pollution distribution in plain rivers

在线全文

学校读者我要写书评

暂无评论

Water Science and Engineering 2011年第1期4卷 83-91页

作者： Long-xi HAN fei huo Juan SUN State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Nanjing 210098 P. R. China Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education Hohai University Nanjing 210098 P. R. China College of Environmental Science and Engineering Hohai University Nanjing 210098 P. R. China

The land area in a river network is divided into certain-scale square cells for the sake of precision, and, based on the physical mechanisms of rainfall-runoff processes and runoff pollution, the non-point source pollution from cells is estimated using the export coefficients of different land use types. The non-point source pollution from a land cell should all go into the closest fiver reach, so it is distributed according to the terrain of the plain river network area and the positions of land cells and river network reaches. A relationship between a single land cell and its pollution-receiving reach can be determined using this system. In view of the above, a spatial distribution model of the rainfall runoff and non-point source pollution in reaches of a plain river network area was established. This model can provide technological support for further research on the dynamic effects of non-point source pollution on water quality.

关键词： non-point source pollution pollution loads, export coefficients plain river network

Surgery for sinus of Valsalva aneurysm： 33-year of a single center experience

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2014年第23期127卷 4066-4070页

作者： Yan fei Murat Abudureheman huo Qiang Askaer Shabiti Zhu Tao Liu Zhen Department of Cardiac Surgery First Affiliated Hospital of Xinjiang Medical University Urumqi Xinjiang 830011 China

Background Sinus of Valsalva aneurysm （SVA） is a rare anomaly and few large or long-term series are well *** study was designed to review 33-year surgical experience of SVA in one *** From August 1980 to December 2013,patients with SVA underwent surgical repair were retrospectively *** A total of 160 patients were identified with mean age of （30±12） years and 112 （70％） of them were *** right coronary sinus origin of SVA was found in 108 patients （67.5％）,the non-coronary sinus in 51 patients （31.9％）,and the left coronary sinus in one patient （0.6％）.The rupture of 3VA into the right ventricle was identified in 89 （55.6％） cases,the right atrium in 61 （38.1％）,the left ventricle in 2 （1.3％） and no rupture in 8 （5.0％）.Ventricular septal defect （VSD） and aortic regurgitation （AR） were found in 59 （37％） and 45 （28％） patients *** approach via the involved chamber was used in 86 patients （54％）,aortotomy in 8 （5％）,and a combined approach in 66 （41％）.Either direct suture （56,35％） or patch （104,65％） closure were used to repair the *** VSD was closed with a patch （44/59,75％） or direct suture （15/59,25％）.aortic valve replacement （AVR） was performed in 23/45 （51％） and aortic valvuloplasty （AVP） in 9/45 （20％） patients combined with *** were 3 hospital deaths （1.9％） and 2 late deaths and 84％ of the patients were followed up for （17.6±4.2） *** York Heart Association functional class improved significantly after surgery （P＜0.01）.Actuarial survival was 94％ at 10 years,and 88％ at 20 *** Surgical treatment of SVA is safe and effective,ruptured SVA or unruptured SVA with VSD and/or AR should be repaired surgically as early as ***,late progressive AR is still a risk during long-term follow-up,and early aggressive measures are *** include more use of a combined approach to achieve optimal evaluation of lesions,more patch repairs to reduce the chance of recurrence,and more AVR in pati

关键词： sinus of Valsalva aortic regurgitation ventricular septal defect cardiac surgical procedures

Synthesis,crystal structures and complexing ability of difunctionalized copillar[5]arene Schiff bases

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2017年第2期28卷 431-436页

作者： Chang-Bo Yin Ying Han Gui-fei huo Jing Sun Chao-Guo Yan College of Chemistry & Chemical Engineering Yangzhou University Yangzhou 225002 China

An efficient method for the synthesis of some difunctionalized copillar[5]arene Schiff bases from condensation of salicylaldehyde and its 5-chloro,5-bromo,3,5-di（t-butyl） substituted derivatives with corresponding diamino-functionalized copillar[5]arene,which were prepared by Gabriel reaction according to the reported ***-crystals of six copillar[5]arenes were determined by X-ray *** ORTEP of compounds showed that the two chains units of Schiff base exist in the outside of the cavity of pillar[5]***,the complexing ability of these Schiff bases to transition metal ions were investigated by UV and fluorescence spectroscopy.

关键词： Pillararene Schiff base Metal complex Single crystal structure Fluorescence

Tight Carbonate Microstructure and its Controls: A Case Study of Lower Jurassic Da'anzhai Member, Central Sichuan Basin

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2020年第2期94卷 305-321页

作者： LI Bo WANG Xingzhi LIU Hongqi WANG Yongjun TIAN Jie huo fei GAO Zhaolong State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu 610500China School of Geoscience and Technology Southw est Petroleum UniversityChengdu 610500 China Research Institute of Petroleum Exploration&Development Beijing 100083China The Institute of Exploration and Development of Southwest Oil and Gas Field Branch.PetroChina.Chengdu 610059 China

Cast thin section observation, scanning electron microscopy(SEM), high-pressure mercury injection(HPMI), and nuclear magnetic resonance(NMR) were used to examine the microstructure of tight carbonate reservoirs in the Lower Jurassic Da’anzhai Member, the central Sichuan Basin. The pore space in the Da’anzhai Member is classified into 2 types and 17 subtypes, with nano-scale pore throats of ‘O’, ‘S’, ‘Z’, and ‘I’ shapes. Poorly sorted pore throats vary greatly in diameter;thus, it is difficult for fluid flow to pass through these pore throats. There are three classes of pore throats in carbonate reservoirs, i.e. isolated pores, pores coexisting with fractures, and large pores and fractures. Isolated pores may provide some pore space, but the permeability is low. Pores and fractures coexisting in the reservoir may have a great impact on porosity and permeability;they are the major pore space in the reservoir. Large pores and fractures have a great impact on reservoir properties, but they only account for a limited proportion of total pore space. The microstructure of Da’anzhai reservoirs, which dominates fluid mobility, is dependent on sedimentary environment, diagenesis, and tectonic process. Pore structure is related to sedimentary environment. The occurrence of microfractures, which may improve reservoir properties, is dependent on tectonic process. Diageneses are of utmost importance to pore evolution, cementation and growth of minerals have played an important role in destroying reservoir microstructure.

关键词： tight carbonate rocks microscopic pore structure diagenesis Da'anzhai Member Lower Jurassic Sichuan Basin

职业卫生领域科技期刊特色化、专业化和精准化发展的思考

在线全文

学校读者我要写书评

暂无评论

天津科技 2024年第1期51卷 100-102,105页

作者：吴雪霍飞李津邓利红徐佳惠天津市疾病预防控制中心(天津市预防医学科学院)预防医学杂志社《中华劳动卫生职业病杂志》编辑部天津300011

科技期刊是科技成果展示和传播的平台,也是科技强国的重要推手。基于2020年9月11日习近平总书记提出的“四个面向”要求,对职业卫生领域科技期刊特色化、专业化和精准化发展路径进行思考,以期为我国科技期刊高质量发展、助力科技创新事... 详细信息

科技期刊是科技成果展示和传播的平台,也是科技强国的重要推手。基于2020年9月11日习近平总书记提出的“四个面向”要求,对职业卫生领域科技期刊特色化、专业化和精准化发展路径进行思考,以期为我国科技期刊高质量发展、助力科技创新事业提供参考。

关键词：科技期刊职业卫生职业医学科技创新精准发展

Synthesis and Optical Properties of Hyperbranched PAEKs Containing Porphyrin and Its Metal Derivatives

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2014年第1期32卷 73-83页

作者： Xu Jiang Yin-long Du Chuan Liu Peng-fei huo Zhi Geng Shu-ling Zhang 王贵宾 College of Chemistry Engineering Research Center of High Performance Plastics Ministry of Education Jilin University

Novel functional hyperbranched poly（aryl ether ketone）s （HPAEKs） bonded with nonlinear optical chromophores （meso-tetrakis（4-hydroxyphenyl） porphyrin, THPP and its metal derivatives） were synthesized and characterized by IH-NMR and UV-Vis absorption spectra. The incorporation of chromophores into HPAEKs endowed HPAEKs novel NLO and OL properties. Indeed, dendritic architecture allowed for maximum dispersion of the chromophores, avoided aggregation, more optical limiting property was obtained. Simultaneously, they retained the excellent properties of the materials, particularly in thermal stability. Their optical properties were evaluated by nonlinear optical analyses and optical limiting. The results showed that these polymers possessed good optical limiting （OL） property and large nonlinear optical （NLO） susceptibilities （ca. 10-12 esu）. All polymers containing chromophores presented excellent thermal stability （DT5 〉 524.17 ℃）.

关键词： Porphyrin Poly(aryl ether ketone)s Hyperbranched Optical limiting.

Design and fabrication of a low modulus β-type Ti-Nb-Zr alloy by controlling martensitic transformation

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2018年第9期37卷 789-794页

作者： Qing-Kun Meng Yu-fei huo Wen Ma Yan-Wei Sui Jin-Yong Zhang Shun Guo Xin-Qing Zhao School of Materials Science and Engineering China University of Mining and Technology GRINM Bohan (Beijing) Publisher Co. Ltd.GRINM Group Co.Ltd. School of Materials Science and Engineering Jiangsu University School of Materials Science and Engineering Beihang University

In this paper, high density of dislocations, grain boundaries and nanometer-scale α precipitates were intro- duced to a metastable Ti-36Nb-5Zr alloy （wt%） through a thermo-mechanical approach including severe cold rolling and short-time annealing treatment. The martensitic trans- formation was retarded, and the β phase with low content of β stabilizers was retained at room temperature after the thermo-mechanical treatment. As a result, both low mod- ulus （57 GPa） and high strength （950 MPa） are obtained. The results indicate that it is a feasible strategy to control martensitic transformation start temperature through microstructure optimization instead of composition design, with the aim of fabricating low modulus β-type Ti alloy.

关键词： Biomedical Ti alloys Martensitictransformation Low modulus Short-time annealing

基于三维小波变换的视频水印嵌入与盲提取算法

在线全文

学校读者我要写书评

暂无评论

电子与信息学报 2007年第2期29卷 447-450页

作者：霍菲菲高新波西安电子科技大学电子工程学院西安710071

为了寻求有效的数字媒体保护方法,该文提出了一种在三维小波变换域内基于二值运算的数字视频水印嵌入算法。为了实现水印的获取,提出了一种相应的水印盲提取算法。水印的嵌入与提取算法每次只对4帧图像进行小波分解,不仅充分利用了小波... 详细信息

为了寻求有效的数字媒体保护方法,该文提出了一种在三维小波变换域内基于二值运算的数字视频水印嵌入算法。为了实现水印的获取,提出了一种相应的水印盲提取算法。水印的嵌入与提取算法每次只对4帧图像进行小波分解,不仅充分利用了小波变换良好的空时多分辨特性,而且占用内存空间少、时延低,适合视频流的在线水印嵌入和提取,并易于硬件的实时实现。实验结果表明,该文所提出的视频水印算法对高斯噪声、MPEG编码、帧平均、帧抽取和帧置乱具有良好的鲁棒性。

关键词：数字视频水印三维小波变换实时嵌入盲检测