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基于皮尔逊相关系数法的盾构掘进参数对地表沉降影响分析

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施工技术（中英文） 2024年第1期53卷 116-123页

作者：董立朋聂清浩孙晓坤曹伍富寇鼎涛白志强杨陕南中铁隧道集团有限公司广东广州511458 中国矿业大学(北京) 北京100083 北京市轨道交通建设管理有限公司北京100068

为研究盾构掘进参数对地表沉降的影响,结合北京地铁19号线某盾构工程的现场监测结果,运用皮尔逊相关系数法对盾构掘进参数对地表沉降影响进行线性回归的相关性分析,检验了线性相关的显著性水平,并针对盾构掘进参数的波动范围和造成的地... 详细信息

为研究盾构掘进参数对地表沉降的影响,结合北京地铁19号线某盾构工程的现场监测结果,运用皮尔逊相关系数法对盾构掘进参数对地表沉降影响进行线性回归的相关性分析,检验了线性相关的显著性水平,并针对盾构掘进参数的波动范围和造成的地表沉降规律进行统计分析,继而通过控制参数来实现地表沉降的精细化控制。结果表明:皮尔逊相关系数法在本工程中应用是可靠的,影响地表沉降的两个关键控制参数为同步注浆量、土压力,相关系数分别为0.52和0.41,其他参数与地表沉降表现为极弱相关;右线盾构的掘进参数较左线进行了更加精细化的控制,最优参数控制范围为平均值95%置信区间,最终使右线上方地表沉降较左线大幅度减小,稳定在6mm以内,通过参数精细化控制取得了良好的沉降控制效果。

关键词：隧道盾构地表沉降相关性线性回归控制

Reduced function and disassembled microtubules of cultured cardiomyocytes in spaceflight

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Chinese Science Bulletin 2008年第8期53卷 1185-1192页

作者： YANG Fen LI YingHui DING bai nie JieLin WANG HongHui ZHANG XiaoYou WANG ChunYan LING ShuKuan NI ChengZhi DAI ZhongQuan TAN YingJun WAN YuMin Laboratory of Space Cell and Molecular Biology China Astronaut Research and Training Center Beijing 100094 China

Lack of gravity during spaceflight has profound effects on cardiovascular system, but little is known about how the cardiomyocytes respond to microgravity. In the present study, the effects of spaceflight on the structure and function of cultured cardiomyocytes were reported. The primary cultures of neo- natal rat cardiomyocytes were carried on Shenzhou-6 spacecraft and activated at 4 h in orbit. 8 samples were fixed respectively at 4, 48 and 96 h after launching for immunofluorescence of cytoskeleton, and 2 samples remained unfixed to analyze contractile and secretory functions of the cultures. Ground sam- ples were treated in our laboratory in parallel. After 115 h spaceflight, video recordings displayed that the number of spontaneous beating sites in flown samples decreased significantly, and the cells in the beating aggregate contracted in fast frequency without synchrony. Radioimmunoassay of the medium showed that the atrial natriuretic peptide secreted from flown cells reduced by 59.6%. Confocal images demonstrated the time-dependant disassembly of mirotubules versus unchanged distribution and or- ganization of microfilaments. In conclusion, above results indicate reduced function and disorganized cytoskeleton of cardiomyocytes in spaceflight, which might provide some cellular basis for further investigations to probe into the mechanisms underlying space cardiovascular dysfunction.

关键词：细胞骨架尿钠排泄肽航天飞行心脏

Effect of Ticagrelor on Coronary Blood Flow and Prognosis in Patients with Acute Myocardial Infarction Undergoing Primary Percutaneous Coronary Intervention in Real World

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Chinese Medical Journal 2018年第21期131卷 2634-2636页

作者： Yan-Yan Jin Rong bai Hui Ai Shao-Pin nie Emergency and Critical Care Center Beijing Anzhen Hospital Capital Medical University Beijing 100029 China Department of Cardiology Beijing Anzhen Hospital Capital Medical University Beijing 100029 China

To the Editor： Current treatment guidelines for patients with acute coronary syndrome （ACS） undergoing percutaneous coronary intervention （PCI） recommend dual antiplatelet therapy, a combination of aspirin and a P2YI2 inhibitor （i.e., clopidogrel, prasugrel, and ticagrelor） for a minimum of 12 months. Ticagrelor, an oral reversibly binding platelet P2Y 12 receptor inhibitor, generates a greater and more consistent inhibitory effect with rapid onset of action as compared to clopidogrel.

关键词： CLINICAL-OUTCOMES NO-REFLOW ADENOSINE CLOPIDOGREL REGISTRY

Regional brain structural abnormality in ischemic stroke patients:a voxel-based morphometry study

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Neural Regeneration Research 2016年第9期11卷 1424-1430页

作者： Ping Wu Yu-mei Zhou Fang Zeng Zheng-jie Li Lu Luo Yong-xin Li Wei Fan Li-hua Qiu Wei Qin Lin Chen Lin bai Juan nie San Zhang Yan Xiong Yu bai Can-xin Yin Fan-rong Liang Acupuncture and Tuina School/Third Teaching Hospital Chengdu University of Traditional Chinese Medicine China Academy of Chinese Medical Sciences World Federation of Acupuncture-Moxibustion Societies Institute of Clinical Anatomy School of Basic Medical SciencesSouthern Medical University Radiology Department West China Hospital of Sichuan University Life Sciences Research Center School of Life Sciences and TechnologyXidian University

Our previous study used regional homogeneity analysis and found that activity in some brain areas of patients with ischemic stroke changed significantly. In the current study, we examined structural changes in these brain regions by taking structural magnetic resonance imaging scans of 11 ischemic stroke patients and 15 healthy participants, and analyzing the data using voxel-based morphometry. Compared with healthy participants, patients exhibited higher gray matter density in the left inferior occipital gyrus and right anterior white matter tract. In contrast, gray matter density in the right cerebellum, left precentral gyrus, right middle frontal gyrus, and left middle temporal gyrus was less in ischemic stroke patients. The changes of gray matter density in the middle frontal gyrus were negatively associated with the clin- ical rating scales of the Fugl-Meyer Motor Assessment （r = -0.609, P = 0.047） and the left middle temporal gyrus was negatively correlated with the clinical rating scales of the nervous functional deficiency scale （r = -0.737, P = 0.010）. Our findings call objectively identify the functional abnormality in some brain regions of ischemic stroke patients.

关键词： nerve regeneration ischemic stroke brain structure abnormality Junctional magnetic resonance imaging gray matter density voxel-based morphometry Fugl-Meyer Motor Assessment nervous fi^nctional deficiency scale functional deficiency neuroplasticity neuralreorganization neural regeneration

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矿井通风系统CAD技术研究

辽宁工程技术大学学报（自然科学版） 2005年第6期24卷 797-800页

作者：李钢陈开岩聂百胜中国矿业大学(北京)资源学院北京100083 中国矿业大学资源学院江苏徐州221008

为了能快捷地绘制矿井通风系统图,并使通风系统网络分析可视化,利用面向对象的技术,设计了实现各种功能的图形基类及各图形类之间的层次关系,提出了巷道的自动绘制算法,以Visual C++6．0为编程环境,开发了矿井通风系统CAD软件,具有图元... 详细信息

为了能快捷地绘制矿井通风系统图,并使通风系统网络分析可视化,利用面向对象的技术,设计了实现各种功能的图形基类及各图形类之间的层次关系,提出了巷道的自动绘制算法,以Visual C++6．0为编程环境,开发了矿井通风系统CAD软件,具有图元拾取与属性标注、工作面推进动态模拟等功能。利用该软件对孔庄矿局部通风系统进行了自动绘制,绘制效果好,速度快,并对某回采工作面推进进行了动态模拟,得出了工作面未来的通风状况,通风技术人员可以由模拟的结果来预测通风系统未来的状态,从而超前制定相应的计划,对于防止事故发生,保障安全生产具有重要的意义。

关键词：矿并通风系统CAD 绘制算法设计图形拾取与属性标注工作面推进动态模拟

Introgression of QTL from Aegilops tauschii enhances yield-related traits in common wheat

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作物学报:英文版 2023年第5期11卷 1521-1532页

作者： Feifei Ma Ranzhe Li Guanghui Guo Fang nie Lele Zhu Wenjuan Liu Linlin Lyu shenglong bai Xinpeng Zhao Zheng Li Dale Zhang Hao Li Suoping Li Yun Zhou Chun-Peng Song State Key Laboratory of Crop Stress Adaptation and Improvement College of AgricultureSchool of Life SciencesHenan UniversityKaifeng 475004HenanChina

To break the narrow diversity bottleneck of the wheat D genome, a set of Aegilops tauschii-wheat introgression(A-WI) lines was developed by crossing Ae. tauschii accession T015 with common wheat elite cultivar Zhoumai 18(Zhou18). A high-density genetic map was constructed based on Single Nucleotide Polymorphism(SNP) markers and 15 yield-related traits were evaluated in 11 environments for detecting quantitative trait loci(QTL). A total of 27 environmentally stable QTL were identified in at least five environments, 20 of which were derived from Ae. tauschii T015, explaining up to 24.27% of the phenotypic variations. The major QTL for kernel length(KL), QKl-2D.5, was delimited to a physical interval of approximately 2.6 Mb harboring 52 candidate genes. Three Kompetitive Allele Specific PCR(KASP)markers were successfully developed based on nonsynonymous nucleotide mutations of candidate gene AetT093_2Dv1G100900.1 and showed that A-WI lines with the T015 haplotype had significantly longer KL than the Zhou18 haplotype across all 11 environments. Four primary valuable A-WIs with good trait performance and carrying yield-related QTL were selected for breeding improvement. The results will facilitate the efficient transfer of beneficial genes from Ae. tauschii into wheat cultivars to improve wheat yield and other traits.

关键词： A-WI Aegilops tauschii Wheat QTL mapping Yield-related traits

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盐湖资源开发利用进展

无机化学学报 2011年第5期27卷 801-815页

作者：宋彭生李武孙柏乜贞卜令忠王云生中国科学院青海盐湖研究所西宁810008 国土资源部盐湖资源与环境重点开放实验室北京100037 中国地质科学院矿产资源研究所北京100037

本世纪头十年里,国际上再度掀起盐湖资源开发热潮。这很大程度上是由于锂的开发热带动的,同时也是和钾肥的广泛施用、价格一路走高有关。南美安第斯高原地区盐湖蕴藏世界70%以上的锂资源,且卤水锂、钾、硼浓度高。该地区极度干旱,少雨多... 详细信息

本世纪头十年里,国际上再度掀起盐湖资源开发热潮。这很大程度上是由于锂的开发热带动的,同时也是和钾肥的广泛施用、价格一路走高有关。南美安第斯高原地区盐湖蕴藏世界70%以上的锂资源,且卤水锂、钾、硼浓度高。该地区极度干旱,少雨多风,非常适合采用卤水盐田蒸发的节能浓缩工艺技术。老的盐湖开发企业则在钾肥需求的带动下,稳步发展。在我国,新疆罗布泊和青海柴达木盆地盐湖则钾锂镁硼产品多元化,经营多元化取得长足进步。本文对近十年来,国内外盐湖开发的新动向做了概括介绍,特别着重于南美"锂三角"地区这一新的生长点。

关键词：盐湖资源盐湖综合利用锂盐开发卤水钾肥生产

Theoretical and experimental study of proportional adding equipment of mine-used dust-fall agent

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Theoretical and experimental study of proportional adding eq...

沟灌肥液入渗硝态氮运移特性数值模拟及影响因素分析

第一届液压技术与矿山装备国际学术会议

作者： nie bai-sheng HU Wei-xi ZHOU Yi-fan GUO Jian-hua HU Shou-tao China University of Mining ＆ Technology

In order to research the dust removal process of dust agent in coal working face,we design the proportional adding equipment of mine-used dust-fall agent for static pressure pipes in coal working face and establish the calculation model of process parameters of this equipment combining with pipe flow theory of fluid mechanics,and theoretically analyze the selection rules of components such as the high pressure piston pump and pneumatic motor power and using CFD software simulate the flow of fluid inside pipes when the equipment *** addition,the proportional adding equipment has been applied to coal working *** the results of the application,this equipment for reducing dust concentration in coal working face（especially PM2.5） has the obvious effect.

关键词： proportional adding equipment high pressure axial piston pump pneumatic motor dust removal proportional adder

来源： cnki会议评论

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农业工程学报 2019年第17期35卷 128-139页

作者：聂坤堃聂卫波白清俊西安理工大学水利水电学院

为探明沟灌肥液(硝酸钾,KNO3)入渗特性,选取杨凌区砂壤土和黏壤土作为供试土壤,以室内试验资料为基础,对不同肥液浓度条件下的土壤水力特性参数与溶质运移参数进行了反演,并模拟分析了不同因素对沟灌肥液入渗过程中硝态氮(NO3^--N)的运... 详细信息

为探明沟灌肥液(硝酸钾,KNO3)入渗特性,选取杨凌区砂壤土和黏壤土作为供试土壤,以室内试验资料为基础,对不同肥液浓度条件下的土壤水力特性参数与溶质运移参数进行了反演,并模拟分析了不同因素对沟灌肥液入渗过程中硝态氮(NO3^--N)的运移规律。结果表明:肥液浓度变化对土壤水力特性参数有一定的影响,其中土壤饱和含水率θs、形状系数n、饱和导水率Ks随肥液浓度的增大呈增加趋势,但进气吸力倒数a值则呈现减小趋势;采用反演所得参数对沟灌肥液入渗过程进行了模拟,其中不同位置处土壤水分和NO3^--N模拟值与实测值相对误差绝对值均值最高分别为6.52%和11.49%,说明反演所得土壤水力特性参数和溶质运移参数是可靠的;土壤初始含水率和肥液浓度对NO3^--N分布的影响较显著,其中NO3^--N分布范围随着土壤初始含水率和肥液浓度的增大而增大;沟中水深和沟底宽对NO3^--N竖直向分布影响较小,但对水平向分布影响较大,其水平向分布范围随着沟中水深和沟底宽的增大而增大。研究结果可为农田沟灌施肥系统的设计与管理提供理论依据。

关键词：肥料灌溉入渗数值反演溶质运移