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水下工程平面定位控制系统

水利水电科技进展 2007年第6期27卷 37-40页

作者：李涛章刘雨泉吴永新陈云武王建龙南京市长江河道管理处江苏南京210036 南京市水利局江苏南京210008

针对大江大河水流环境下的水下工程平面精确定位难题,进行水下工程平面测量定位系统应用性研究。将水下电视技术和多阵元基阵的短基线水声定位技术相结合,解决了传统水声定位精度低的问题。采用多基元短基线定位方法进行快速定位检测,... 详细信息

针对大江大河水流环境下的水下工程平面精确定位难题,进行水下工程平面测量定位系统应用性研究。将水下电视技术和多阵元基阵的短基线水声定位技术相结合,解决了传统水声定位精度低的问题。采用多基元短基线定位方法进行快速定位检测,搜寻并确认目标,处理、记录、显示成果,获得了满足工程精度要求的水下平面定位系统,保证了水下工程的质量。

关键词：水下工程多阵元基阵水声定位平面定位系统

大脑中动脉M1段分支的显微解剖研究及临床意义

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内蒙古中医药 2010年第8期29卷 36-37页

作者：谢静义赵宏祥刘玉泉江苏省常州市武进中医医院 213161

目的:研究大脑中动脉M1段分支的显微解剖结构为临床工作提供参考。方法:显微解剖15具湿性成人尸头标本,观测M1段中央支和皮质支的支数及走向。结果:M1段发出的中央支支数为左侧:8.27±2.49支,右侧:7.67±2.35支(P=0.420),共有21支近端... 详细信息

目的:研究大脑中动脉M1段分支的显微解剖结构为临床工作提供参考。方法:显微解剖15具湿性成人尸头标本,观测M1段中央支和皮质支的支数及走向。结果:M1段发出的中央支支数为左侧:8.27±2.49支,右侧:7.67±2.35支(P=0.420),共有21支近端皮质分支,走向复杂。结论:M1段的分支复杂而多变,术中应仔细观察避免损伤。

关键词：大脑中动脉显微解剖

大容量全肺灌洗治疗尘肺合并慢性阻塞性肺疾病

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郧阳医学院学报 2008年第4期27卷 317-319页

作者：涂明利刘玉全雷怀定刘先军秦成名王贤裕全守波郧阳医学院附属太和医院呼吸内科湖北十堰442000 郧阳医学院附属太和医院麻醉科湖北十堰442000

目的:探讨大容量全肺灌洗治疗尘肺合并慢性阻塞性肺疾病(COPD)患者的安全性和疗效。方法:35例尘肺合并COPD患者,采用双腔气管插管、静脉复合麻醉、单肺通气-双肺通气交替,行大容量单侧肺灌洗术,1周后再灌洗对侧肺。监测生命体征和动脉血... 详细信息

目的:探讨大容量全肺灌洗治疗尘肺合并慢性阻塞性肺疾病(COPD)患者的安全性和疗效。方法:35例尘肺合并COPD患者,采用双腔气管插管、静脉复合麻醉、单肺通气-双肺通气交替,行大容量单侧肺灌洗术,1周后再灌洗对侧肺。监测生命体征和动脉血气,检测肺功能指标的变化情况。结果:35例患者共接受全肺灌洗术70次,术中出现一过性哮鸣音和一过性低氧血症各7例次(10%),未出现其他并发症,有效率100%。术后2周肺通气和换气功能明显好转、症状缓解,至少持续6月。结论:严格的术前肺功能评估和术中单肺-双肺交替通气下大容量全肺灌洗治疗尘肺合并COPD安全有效。

关键词：尘肺慢性阻塞性肺疾病全肺灌洗治疗

Compensation for Heterogeneous Unknowns and Performance-Prescribed Consensus

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 173-182页

作者： Linzhen yu yungang liu the School of Control Science and Engineering Shandong University

In this paper, the multi-agent systems(MASs) typically with heterogeneous unknown nonlinearities and nonidentical unknown control coefficients are studied. Although the model information of MASs is coarse, the leader-following consensus is still pursued, with a prescribed performance and zero consensus errors. Leveraging a powerful funnel control strategy, a fully distributed and completely relative-state-dependent protocol is designed. Distinctively, the time-varying function characterizing the performance boundary is introduced, not only to construct the funnel gains but also as an indispensable part of the protocol,enhancing the control ability and enabling the consensus errors to converge to zero(rather than a residual set). Remark that when control directions are unknown, coexisting with inherent system nonlinearities, it is essential to incorporate an additional compensation mechanism while imposing a hierarchical structure of communication topology for the control design and analysis. Simulation examples are given to illustrate the effectiveness of the theoretical results.

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Preparation and Characterization of Novel Ti-doped M-site Deficient Olivine LiFePO_4

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Chinese Chemical Letters 2006年第8期17卷 1093-1096页

作者： yu Heng SUN Xing quan liu Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041 Graduate School of the Chinese Academy of Sciences Beijing 100039 College of Materials and Chemistry ＆ Chemical Engineering Chengdu University of Technology Chengdu 610059

A novel Ti-doped M-site deficient olivine LiFePO4, i.e. Li0.95Fe0.95Ti0.05PO4, was synthesized by a solid-state reaction method. XRD and VTR were used to characterize the as-prepared samples. As a cathode material for... 详细信息

关键词： LiFePO4 Ti-doped M-site deficient rate capability cathode material.

Territorial suitability assessment and function zoning in the Jiuzhaigou earthquake-stricken area

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Journal of Mountain Science 2019年第1期16卷 195-206页

作者： yu Hui QIANG Miao liu Shao-quan Institute of Mountain Hazards and Environment Chinese Academy of Sciences University of Chinese Academy of Sciences Chengdu Pidu Disstrict Mianshi Foreign Language School

An earthquake in the Jiuzhaigou area caused numerous secondary disasters, such as rolling stones, land collapse, landslides and debris flow, which badly affected the safety of human settlements and influenced the spatial layout of the post-disaster reconstruction. Therefore, carrying out assessments of land and identifying a suitable zone for human habitats were very important. This research creates the territorial suitability assessment and function zoning conceptual model in the earthquake-stricken area, and the new methods of the territorial suitability evaluation system were used to divide the spatial functional zones of the earthquake stricken area, which provide a theoretical guidance and decisionmaking basis for the reconstruction of the disaster area. The results showed that:(1) The Jiuzhaigou earthquake-stricken area comprises of an ecological area that has a high level of importance to the ecosystem. In the earthquake-stricken area, 65% of national land is at an altitude of 3000-4000 m, and therefore not suitable for a high level of intensive reconstruction, but reconstructed in an eco-friendly manner.(2) The zone suitable for reconstruction comprises mainly of the river valley and the flat terrain of western parts. The land with low suitability is mainly located on steep terrain, such as highmountains and low gullies. The geographic and geomorphic conditions limit the spread of a suitable reconstruction zone.(3) The earthquake-stricken area mainly comprises of a tourism industry gathering area, population gathering area, agriculture and animal husbandry development area, and ecological preservation area with areas of 76 km^2, 44 km^2, 1591 km^2 and 7512 km^2, respectively. Scientifically zoning the reconstruction areas using scientific evaluation may provide guidance for the location of reconstruction sites.

关键词： Jiuzhaigou valley Earthquake-stricken area Territorial suitability Function zoning

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炼油厂催化裂化油浆的综合利用

江苏化工 2001年第3期29卷 38-42页

作者：刘玉泉中石化河南油田南阳石蜡精细化工厂河南南阳473132

重油催化裂化装置抽出油浆已成为当前改善催化裂化操作的有效手段 ,目前油浆主要作为燃料油的调合油 ,这种利用油浆的方式效益低 ,而且油浆中含有少量固体颗粒 ,易造成炉嘴结焦。本文从实际应用的角度出发 ,介绍了催化油浆在炼油方面的... 详细信息

重油催化裂化装置抽出油浆已成为当前改善催化裂化操作的有效手段 ,目前油浆主要作为燃料油的调合油 ,这种利用油浆的方式效益低 ,而且油浆中含有少量固体颗粒 ,易造成炉嘴结焦。本文从实际应用的角度出发 ,介绍了催化油浆在炼油方面的几种应用途径。这些方法简单易行 ,且灵活性大 ,在现有炼油装置上即可实现。科学地利用催化油浆对于提高企业的经济效益具有重要意义。

关键词：催化裂化油浆渣油利用综述炼油

桥梁缆索用热镀锌钢丝松弛性能与扭转性能的关系

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金属制品 2010年第4期36卷 18-20页

作者：赵卫国刘泉裕中本洋平江苏双友东纲金属制品有限公司江苏江阴214445

介绍悬索桥和斜拉桥长大化的历史。为延长桥梁主缆、吊索和斜拉索的使用寿命,缆索用热镀锌钢丝必须具备优良的耐疲劳性、耐腐蚀性、低松弛性,以及即使局部发生扭转也不会破损的良好扭转性能。给出低扭转钢丝的定义,针对热镀锌钢丝能否... 详细信息

介绍悬索桥和斜拉桥长大化的历史。为延长桥梁主缆、吊索和斜拉索的使用寿命,缆索用热镀锌钢丝必须具备优良的耐疲劳性、耐腐蚀性、低松弛性,以及即使局部发生扭转也不会破损的良好扭转性能。给出低扭转钢丝的定义,针对热镀锌钢丝能否同时具备良好扭转性能和低松弛性能进行调查,并通过试验进行验证,结果表明:如果热镀锌后钢丝的扭转性能良好,经过适当的稳定化处理(低松弛或普通松弛热稳定化处理)后,钢丝的扭转性能与松弛性能无关。

关键词：桥梁缆索热镀锌钢丝松弛性能扭转性能稳定化处理

Effects of shear-thinning/thickening nature on the stability of Couette-like flow with uniform crossflow

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Acta Mechanica Sinica 2013年第6期29卷 806-810页

作者： yu-quan liu Jie Peng Ke-Qin Zhu Department of Engineering Mechanics Tsinghua University

The linear stability of wall-injected pressure- driven Couette-like flow in power-law fluids is studied. Previous study on this kind of flow for Newtonian fluids by Nicoud and Angilella [Phys. Rev. E 56, 3000 （1997）] was extended to power-law fluids to understand the effects of shear-thinning/thickening nature on the flow stability. A related expression between the critical crossflow Reynolds number for Newtonian fluids and that for power-law fluids is obtained as the streamwise Reynolds number is large enough based on numerical computations, and verified theoretically in the case of a limiting condition with the power-law index.

关键词： Power-law fluid Couette-like flow - Crossflow Linear stability