检索结果-南通市图书馆

维普期刊数据库博看期刊

在线全文

学校读者我要写书评

暂无评论

提高志留系龙马溪组螺杆取心收获率技术

天然气勘探与开发 2024年第3期47卷 105-110页

作者：段绪林熊鸿照朱绍文刘书培卓云杜世轶中国石油集团川庆钻探工程有限公司川东钻探公司重庆401120

志留系下统龙马溪组页岩致密,常规取心钻速低,采用新工艺螺杆取心后,取心钻速提高50%以上,但受掉心多发以及单次取心进尺差异大影响,实际操作可行性较低,从而使螺杆配套取心技术难以发展与推广。针对高转速螺杆取心作业难点,深入分析龙... 详细信息

志留系下统龙马溪组页岩致密,常规取心钻速低,采用新工艺螺杆取心后,取心钻速提高50%以上,但受掉心多发以及单次取心进尺差异大影响,实际操作可行性较低,从而使螺杆配套取心技术难以发展与推广。针对高转速螺杆取心作业难点,深入分析龙马溪组各小层岩石特性和螺杆取心技术特点,开展螺杆选型和取心参数优化研究,形成了龙马溪组螺杆长筒取心工艺技术。研究结果表明:①优选螺杆,并分层段优化取心排量控制方法,控制岩心直径大小,防止割心环节发生岩心抽筒;②采取停泵割心并优化循环排量,防止循环过程中岩心掉井。该技术在Z301、Z221井龙马溪组现场试验,2口井共取心7筒次,取心进尺174.50 m,心长173.73 m,收获率99.56%,岩心收获率显著提升,实现了螺杆取心工艺技术突破。该技术可在页岩、砂岩、石灰岩、铝土质泥岩等可钻性较差地层推广应用,解决取心钻速低的难题。

关键词：早志留世螺杆取心收获率取心进尺机械钻速

Potential mosquito-associated melioidosis and analysis of sample processing results in Hainan, China, 2023

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2024年第5期17卷 235-236页

作者： Xun Kang shaowen Cheng Rui Zheng Hengjie zhu Qianfeng Xia NHC Key Laboratory of Tropical Disease Control School of Tropical MedicineHainan Medical UniversityHainanHaikou 571199China Department of Wound Repair the First Affiliated Hospital of Hainan Medical UniversityHainanHaikou 571199China

Burkholderia(B.)pseudomallei is a Gram-negative bacterium causing melioidosis,a tropical infection that is being recognized as a growing public health problem[1].Melioidosis,with mortality rates ranging from under 10%to 40%,is a significant concern in Southeast Asia,Australia,and beyond[2].The underdiagnosis,particularly in rural areas,emphasizes the need for improved awareness,surveillance,and management,potentially classifying melioidosis as a neglected tropical disease[3].

关键词： tropical Hainan neglected

以解剖结构为主体的视频教学在犬盲肠切除术授课中的应用

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

解剖学杂志 2024年第2期47卷 168-170页

作者：周树洋朱绍文高天宇张志欣孙瑜周潇逸钱阳阳海军军医大学基础医学院上海200433 海军军医大学第一附属医院外科学教研室上海200433 海军军医大学第一附属医院内科学教研室上海200433

犬盲肠切除术是外科手术学基础中重要的一节内容,用以模拟人体阑尾切除术,既往的教学模式通过一个课时的授课幻灯、书本理论以及操作录像对学生进行讲授后即刻在实验犬上操作。由于学生在掌握局部解剖关系时存在一定困难,加上犬盲肠和... 详细信息

犬盲肠切除术是外科手术学基础中重要的一节内容,用以模拟人体阑尾切除术,既往的教学模式通过一个课时的授课幻灯、书本理论以及操作录像对学生进行讲授后即刻在实验犬上操作。由于学生在掌握局部解剖关系时存在一定困难,加上犬盲肠和人体阑尾在结构上存在一定差异,因此导致学生对于犬盲肠局部的三维解剖结构缺乏空间认知,在寻找盲肠过程中往往花费较长时间。以往的操作录像由于局部出血、解剖遮挡,并且主要以讲解手术操作为目的,往往无法让学生清晰明了地看到盲肠周围局部解剖结构。翻转课堂将主要信息、知识的传递等大部分传授教学活动移出课堂,利用课堂时间开展积极互动和联想交流的学习活动,学生完成课前和课后任务,为课堂学习做好充分准备[1]。本研究将课题组自行录制以局部解剖结构为主体的高清教学视频,让学生以翻转课堂的形式学习犬盲肠局部解剖结构和层次,以达到帮助学生更好地完成后续手术操作的目的。

关键词：局部解剖结构阑尾切除术视频教学教学视频课后任务手术操作空间认知书本理论

Study on Thermomagnetic Treatment Fe-25.5Cr-12Co Permanent Magnetic Alloy

在线全文

学校读者我要写书评

暂无评论

材料热处理学报 2004年第5期25卷 561-563页

作者： GAORun-sheng ZHENLiang shaowen-zhu SUNXue-yin zhuDan-yang XURen-gen DepartmentofMaterialsScience HarbinInstituteofTechnologyHarbinChina TechnologyandDevelopmentCentre HangzhouPermanentMagnetGroupCo.Ltd.HangzhouChina

The magnetic properties and microstructure in a low cobalt Fe-25.5Cr-12Co alloy by different process of thermomagnetic treatment were investigated. It is found that magnetic properties are sensitive to parameters of thermo- magnetic treatment process in magnetic field, including temperature, time and applied magnetic field. There are optimized isothermal aging temperature and time in different magnetic heat treatment conditions. High magnetic field strength could improve magnetic properties. Applied magnetic field has a great effect on microstructure of the Fe-25.5Cr-12Co alloy. The finer ferromagnetic d] particles with suitable c/a ratio by high magnetic field magnetic heat treatment are attributed to improvement the magnetic properties.

关键词： Fe-25.5Cr-12Co合金热磁处理磁性显微结构永久磁铁

Exploring HONO formation and its role in driving secondary pollutants formation during winter in the North China Plain

在线全文

学校读者我要写书评

暂无评论

环境科学学报:英文版 2023年第10期132卷 83-97页

作者： Shaobin Zhang Guo Li Nan Ma Yao He shaowen zhu Xihao Pan Wenlin Dong Yanyan Zhang Qingwei Luo Jeannine Ditas Uwe Kuhn Yuxuan Zhang Bin Yuan Zelong Wang Peng Cheng Juan Hong Jiangchuan Tao Wanyun Xu Ye Kuang Qiaoqiao Wang Yele Sun Guangsheng Zhou Yafang Cheng Hang Su Institute for Environmental and Climate Research Jinan UniversityGuangzhou 511443China Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality Guangzhou 511443China Max Planck Institute for Chemistry Mainz 55128Germany School of Atmospheric Sciences Nanjing UniversityNanjing 210023China Institute of Mass Spectrometry and Atmospheric Environment Jinan UniversityGuangzhou 510632China State Key Laboratory of Severe Weather&Key Laboratory for Atmospheric Chemistry Institute of Atmospheric CompositionChinese Academy of Meteorological SciencesBeijing 100081China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Gucheng Experimental Station of Ecological and Agricultural Meteorology Chinese Academy of Meteorological SciencesBeijing 100081China

Daytime HONO photolysis is an important source of atmospheric hydroxyl radicals(OH).Knowledge of HONO formation chemistry under typical haze conditions,however,is still *** the Multiphase chemistry experiment in Fogs and Aerosols in the North China Plain in 2018,we investigated the wintertime HONO formation and its atmospheric implications at a rural site *** different episodes based on atmospheric aerosol loading levels were classified:clean periods(CPs),moderately polluted periods(MPPs)and severely polluted periods(SPPs).Correlation analysis revealed that HONO formation via *** conversion of NO_(2)was more efficient on aerosol surfaces than on ground,highlighting the important role of aerosols in promoting HONO *** HONO budget analysis indicated a large missing source(with an average production rate of 0.66±0.26,0.97±0.47 and 1.45±0.55 ppbV/hr for CPs,MPPs and SPPs,respectively),which strongly correlated with photo-enhanced reactions(NO_(2)heterogeneous reaction and particulate nitrate photolysis).Average OH formation derived from HONO photolysis reached up to(0.92±0.71),(1.75±1.26)and(1.82±1.47)ppbV/hr in CPs,MPPs and SPPs respectively,much higher than that from O3 photolysis(i.e.,(0.004±0.004),(0.006±0.007)and(0.0035±0.0034)ppbV/hr).Such high OH production rates could markedly regulate the atmospheric oxidation capacity and hence promote the formation of secondary aerosols and pollutants.

关键词： HONO North China Plain Budget analysis OH radicals

mSOAR评分对急性缺血性卒中患者不良预后风险预测价值的分析

在线全文

学校读者我要写书评

暂无评论

智慧健康 2022年第11期8卷 37-39页

作者：朱少文英德市人民医院广东英德513000

发生脑卒中是中老年人群的常见和多发的疾病,且具有发病比较高、致残比例高和出现死亡比例高等特点,SOAR(stroke subtype, oxfordshire community stroke project classification, age and prestroke modified rankin, mSOAR)评价得分对于国内发生急性发作的缺血性卒中(acute ischemic stroke,AIS)病人出现的不良预后风险得有着较好的预测价值。在工作中,通过总结分析AIS病人资料有关情况,登记病人年龄、牛津郡社区卒中项目(oxfordshire community stroke project,OCSP)分类别、卒中之前的改进型Rankin统计量表(modified rankin scale,mRS)评分,美国国家卫生研究院关于卒中量表(national Institutes of health stroke scale,NIHSS)评价得分等相关统计计算信息,在入院时以mSOAR统计量表开展评价得分。所有病人在出院时通过mRS工具进行评价得分,在出院时发生的死亡或重残表示为不良预后。mSOAR评价得分预判病人在出院时发生的不良预后等潜在风险的病人工作特点(receiver operating characteristic curve,ROC)的在坐标图中曲线下的所占面积范围(area under curve,AUC)的数值,mSOAR的评价表在预判AIS病人出院时出现不良预后的风险预测水平相对较高。

关键词： m SOAR 急性缺血性卒中不良预后风险预测分析

A biomechanical study of the recovery in spinal stability of flexion/extension and torsion after the resection of different posterior lumbar structures in a sheep model

在线全文

学校读者我要写书评

暂无评论

A biomechanical study of the recovery in spinal stability of...

A Biomechanical Study on the Recovery in Stability after Different Posterior Lumbar Structure Injury

第二十届全国中西医结合骨伤科学术研讨会、第二届中国医师协会中西医结合医师分会骨伤科学术年会、第十九届浙江省中西医结合骨伤科专业委员会学术年会

作者： Haobo Jia Xinlong Ma Jianxiong Ma shaowen zhu Department of Orthopedics Tianjin Medical University General Hospital Biomechanics labs of Orthopaedics Institute Tianjin Hospital

Posterior lumbar structures are vital for spinal stability,and many researchers thought that laminectomy and facetectomy would lead to severe spinal ***,because living organisms have compensatory repair capacities,their long-term condition after posterior lumbar structure injuries may change over *** study the changes in the lumbar biomechanical stability of flexion/extension and torsion at different time points after the resection of various posterior structures,as well as to assess the capacity for self-healing in lumbar stability,sheep that had undergone laminectomy or facetectomy were used as an experimental animal *** injured sheep models included three groups:laminectomy only,laminectomy plus left total facetectomy,and laminectomy plus bilateral *** sheep that did not undergo a surgical procedure were used as the control *** 0, 6,12,24,36 weeks after the resection of the posterior lumbar structures,the lumbar specimens were harvested for biomechanical testing based on flexion/extension and torsion movements using the Instron 8874 servohydraulic biomechanical testing *** changes in the injured lumbar spine were also analyzed through radiological *** lumbar stability in flexion/extension and torsion was severely decreased after the three types of *** six weeks,the flexion/extension mechanical parameters recovered substantially;each parameter had returned to normal levels by 12 weeks and exceeded the intact group by 24 and 36 *** stiffness also recovered gradually over *** of the injury groups demonstrated decreased intervertebral space and degeneration or even fusion in the small joints of the surgical segment or in adjacent segments based on radiological *** results indicate that the body has the ability to repair the mechanical instability to a certain extent.

关键词： Lumbar posterior structures laminectomy facetectomy stability biomechanics recovery

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

A Biomechanical Study on the Recovery in Stability after Dif...

作者： Haobo Jia Xinlong Ma Jianxiong Ma shaowen zhu Department of Orthopedics Tianjin Medical University General Hospital Biomechanics labs of Orthopaedics Institute Tianjin Hospital

Objective:To study the relationship between the extent in the posterior lumbar structures resection and postoperative lumbar stability,the repair responses to the injured and changes in stability at different post-injury time points;To assess the ability and mechanism in self-healing of ***:Small Tail Han sheep were used as experimental *** injury models include 3 groups(each group contains 20 sheep): laminectomy only—Resection of the vertebral plates,supraspinous ligament,interspinous ligament and spinous processes of L4 and L5(Group 1);laminectomy and left L4/5 total facetectomy(Group 2);laminectomy and both L4/5 facetectomies(Group 3).8 complete non-operative sheep were used as the control group(Group of intact).At 0,6,12,24,36 weeks post operation,the lumbar specimens were harvested for spiral CT scan and biomechanical testing and histology *** biomechanical testing,the authors set the range of motion of flexion /extension and bending for each 5°and the range of motion of torsion for each 2.5°.The loading frequency was 0.1 Hz,the loading speed of bending was 2°/s and the loading speed of torsion was 2°/ *** the testing process load—displacement data were *** neutral zone,the neutral zone stiffness and elastic zone stiffness in flexion/extension movement,and stiffness in lateral bending and axial rotation were calculated and compared among specimens in different time points and injury *** changes in injured lumbar spines were analyzed through radiological and pathohistologic *** CT scan was used to evaluate the changes of the vertebral canal diameter,intervertebral height,morphology and scope of scar tissue in laminectomy ***:The sheep' s lumbar stability was destroyed by the 3 types of surgery injuries, especially in flexion/extension and axial rotation(p<0.05).The extent decreases in stability was correlate with the injury severity *** 6 week,the mechanical stabilities of lu

关键词： A Biomechanical Study on the Recovery in Stability after Different Posterior Lumbar Structure Injury

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

In掺杂CdO透明导电薄膜的研究

太阳能学报 2018年第3期39卷 769-774页

作者：冯绍文刘少煜祝巍中国科学技术大学物理学院物理实验教学中心

通过磁控射频溅射的方法分别在石英玻璃基底上和硅〈111〉基底上沉积In掺杂CdO透明导电薄膜。利用XRD、紫外可见分光光度计和霍尔效应测量仪测试薄膜的结构、光学和电学性能。一定量的In掺杂可将CdO的光学吸收边从2．2eV提高至3．4eV，... 详细信息

通过磁控射频溅射的方法分别在石英玻璃基底上和硅〈111〉基底上沉积In掺杂CdO透明导电薄膜。利用XRD、紫外可见分光光度计和霍尔效应测量仪测试薄膜的结构、光学和电学性能。一定量的In掺杂可将CdO的光学吸收边从2．2eV提高至3．4eV，甚至更高。同时适量的In掺杂可明显改善CdO薄膜的电学性能，在提高其电子浓度的同时也降低电阻率，获得最低5．8×10-5Ω·cm的电阻率，同时吸收边为3．24eV的透明导电薄膜。In掺杂的CdO薄膜作为一种性能良好的薄膜材料有较好的发展前景。

关键词： CdO薄膜透明导电薄膜磁控射频溅射 XRD 霍尔效应