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考虑弱势群体疏散行为特征的高层住院楼疏散仿真及优化

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科学技术与工程 2024年第2期24卷 715-722页

作者：刘晓然丰慧曾德民张略淼北京建筑大学理学院北京102616 北京建筑大学土木与交通工程学院北京100044

为有效提高高层住院楼内人员安全疏散效率,选取某综合医院高层住院楼为研究对象,重点考虑高层住院楼内弱势群体疏散行为特征,结合视域分析法对住院楼内部空间进行适弱化分析,应用Anylogic软件对建筑内部人员开展多情景疏散仿真。结果表... 详细信息

为有效提高高层住院楼内人员安全疏散效率,选取某综合医院高层住院楼为研究对象,重点考虑高层住院楼内弱势群体疏散行为特征,结合视域分析法对住院楼内部空间进行适弱化分析,应用Anylogic软件对建筑内部人员开展多情景疏散仿真。结果表明,进行紧急疏散时,建筑内的空间布局会诱使疏散压力集中在建筑内某一区域;依据住院楼内人员的生理和行为特征进行分类,将不同类别人员组合并进行分梯疏散,最优方案下整体疏散效率提高了15.95%。可见考虑弱势群体的疏散行为特征,对人员进行合理的分组分梯疏散能有效提高高层住院楼整体疏散效率。

关键词：高层住院楼空间句法弱势群体疏散行为 Anylogic 分组分梯

Multi-scale defects in powder-based additively manufactured metals and alloys

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Journal of Materials Science & Technology 2022年第27期122卷 165-199页

作者： J.Fu H.li X.Song M.w.Fu Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina State Key laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Mechanical and Automation Engineering Chinese University of Hong KongShatinHong KongChina

Defect formation is a critical challenge for powder-based metal additive manufacturing(AM).Current understanding on the three important issues including formation mechanism,influence and control method of metal AM defects should be *** this review paper,multi-scale defects in AMed metals and alloys are identified and for the first time classified into three categories,including geometry related,surface integrity related and microstructural *** particular,the microstructural defects are further divided into internal cracks and pores,textured columnar grains,compositional defects and dislocation *** root causes of the multi-scale defects are *** key factors that affect the defect formation are identified and *** detection methods and modeling of the multi-scale defects are briefly *** effects of the multi-scale defects on the mechanical properties especially for tensile properties and fatigue performance of AMed metallic components are *** control and mitigation methods for the corresponding defects,include process parameter control,post processing,alloy design and hybrid AM techniques,are summarized and *** research aspect,current research gaps and future prospects from three important aspects of the multi-scale AM defects are identified and delineated.

关键词： Metal additive manufacturing Multi-scale defects Detection and modeling Mechanical properties Defect control and mitigation

基于产出导向法的民族地区商务英语类课程思政元素融入研究

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西昌学院学报（社会科学版） 2024年第2期36卷 114-121页

作者：乔瑒雷惠高吕斌西昌学院外国语学院

坚持立德树人根本任务,立足民族地区商务英语应用型人才培养目标,在产出导向法视域下,针对民族地区商务英语类课程思政存在的两大问题,总结民族地区商务英语类课程思政元素融入原则,提出“五四三”民族地区商务英语类课程思政元素挖掘... 详细信息

坚持立德树人根本任务,立足民族地区商务英语应用型人才培养目标,在产出导向法视域下,针对民族地区商务英语类课程思政存在的两大问题,总结民族地区商务英语类课程思政元素融入原则,提出“五四三”民族地区商务英语类课程思政元素挖掘思路以及“三感三度”民族地区商务英语类课程思政课堂教学思路,以期为外语课程思政建设的创新发展提供参考。

关键词：产出导向法民族地区商务英语课程思政

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变椭圆振动筛筛分性能的数值模拟研究

石油机械 2024年第4期52卷 62-70页

作者：韩庆锋吕志鹏闵庆新段铃童长江大学机械结构强度与振动研究所沧州市华油飞达固控设备有限公司

钻井液振动筛作为一级固相控制设备,常存在“筛堵”“筛糊”和“跑浆”等问题,而通过改变“力心”和质径积比值等参数来得到合理的变椭圆振动轨迹,可以较好解决这些问题。针对变椭圆轨迹振动筛的结构参数改变要求,研究其对振动轨迹和颗... 详细信息

钻井液振动筛作为一级固相控制设备,常存在“筛堵”“筛糊”和“跑浆”等问题,而通过改变“力心”和质径积比值等参数来得到合理的变椭圆振动轨迹,可以较好解决这些问题。针对变椭圆轨迹振动筛的结构参数改变要求,研究其对振动轨迹和颗粒行为的影响,并基于离散元法(Discrete Element Method)的耦合多体系统动力学(Dynamics of Multi-body System)研究方法,对变椭圆振动筛本体和物料颗粒进行联合分析求解;分析了变椭圆振动筛力心位置和偏心块质径积比值对振动轨迹、物料颗粒运移速度和透筛率的影响。结果表明:振动筛在力心与质心的距离在100~150 mm,偏心块质径积比值在10∶7左右,入料端最大椭圆倾角在60°~65°时,变椭圆振动筛可以达到较好的筛分性能。研究结论可为变椭圆振动筛的设计提供理论支持。

关键词：钻井液振动筛变椭圆离散元法耦合多体系统动力学筛分效率力心物料颗粒

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中国中老年人身体活动水平与脑卒中发生的相关性:基于CHARlS数据

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中国康复理论与实践 2024年第4期30卷 449-453页

作者：粟昭隐康巍瀚刘亚涛吕媛 Michael NERlICH 兰州大学第一临床医学院甘肃兰州市730000 兰州大学第一医院甘肃兰州市730000 兰州大学第二临床医学院甘肃兰州市730000 德国雷根斯堡大学医院德国雷根斯堡80333

目的探究中国中老年人身体活动水平与脑卒中发生的关联。方法分析中国健康与养老追踪调查(CHARlS)2020年数据中19395例受访者的自我报告数据。结果发生脑卒中1368例(7.05%)。年龄≥65岁(OR=1.049,95%CI 1.043~1.055,P<0.001)、与配偶分... 详细信息

目的探究中国中老年人身体活动水平与脑卒中发生的关联。方法分析中国健康与养老追踪调查(CHARlS)2020年数据中19395例受访者的自我报告数据。结果发生脑卒中1368例(7.05%)。年龄≥65岁(OR=1.049,95%CI 1.043~1.055,P<0.001)、与配偶分居(OR=2.004,95%CI 1.091~3.683,P=0.025)、丧偶(OR=1.669,95%CI 1.452~1.919,P<0.001)是脑卒中发生的危险因素。相比于教育水平为小学,初中(OR=0.766,95%CI 0.664~0.883,P<0.001)、高中及中专(OR=0.804,95%CI 0.665~0.972,P=0.024)、大学及以上(OR=0.568,95%CI 0.361~0.894,P=0.015)是脑卒中发生的保护因素;与低强度身体活动水平相比,中强度身体活动水平(OR=0.691,95%CI 0.598~0.799,P<0.001)、高强度身体活动水平(OR=0.417,95%CI 0.364~0.478,P<0.001)是脑卒中发生率的保护因素。调整婚姻状态、受教育程度后,年龄≥65岁(OR=2.398,95%CI 2.139~2.668,P<0.001)、女性(OR=0.834,95%CI 0.746~0.933,P=0.001)、中强度身体活动水平(OR=0.755,95%CI 0.652~0.874,P<0.001)、高强度身体活动水平(OR=0.498,95%CI 0.433~0.572,P<0.001)仍与脑卒中的发生相关。结论适度身体活动可能降低脑卒中的发生风险。

关键词：脑卒中中老年人身体活动中国健康与养老追踪调查

Rate of Recurrence of Non-Small Cell lung Cancer in Patients Treated with Percutaneous Ablation

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Advances in lung Cancer 2014年第4期3卷 75-81页

作者： Narottam S. Regmi Brett l. Heber James w. Klena The Department of Internal Medicine University of Pittsburgh Medical Center Northwest Seneca PA USA Department of Biology Juniata College Huntingdon PA USA Thoracic Surgery Service University of Pittsburgh Medical Center Northwest Seneca PA USA

Background: Percutaneous ablation therapy as a treatment for non-small cell lung cancer (NSClC) has been increasingly utilized. There is little data on long term efficacy. Because of this we reviewed the rate of recurrence of all ablation procedures done at our institution for the last 6 years. Methods: A total of 36 patients underwent 43 percutaneous procedures from July 2008 until January 2014 at our institution. There were 9 patients treated with radiofrequency ablation (RFA) and 27 treated withmicrowave ablation (MwA) for Stage I NSClC. Each patient was reviewed to determine if there was a recurrence, the time to recurrence and the characteristics of the original cancer possibly predisposing the procedure to failure. Results: There were 8 recurrences in 9 patients undergoing RFA occurring at a median time of 842 days (range 425 - 1568) after their procedure. MwA was utilized in 27 patients for 34 procedures with 11 patients experiencing recurrences at a median time of 487 days (range 168 - 845). The median follow up time for the RFA patients was 1631 days (4.46 years) and for the MwA patients 751 days (2.06 years). Of the RFA recurrences, 5 involved systemic spread of their cancer and 3 were limited to site recurrences only. Of the MwA recurrences, 5 involved systemic spread of their cancer, 2 had chest wall recurrences and 4 were limited to site recurrences only.

关键词： Ablative Therapies lung Cancer Surgery

Erratum to Genetic and molecular changes in ovarian cancer

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Cancer Biology & Medicine 2017年第2期14卷 196-201页

作者： Robert l Hollis Charlie Gourley Edinburgh Cancer Research UK Centre MRC Institute of Genetics and Molecular Medicine University of Edinburgh Edinburgh EH4 2XR UK

In the published article~, some errors appeared on page 238, Figure 1, and reference list. The editors and the authors apologize for the errors and for any confusion they may have caused. On page238, the sentence of ＂affecting 20% and 17.5% of cases＂ should be changed to ＂and that inactivation of these genes occurs in 17.5% and 20% of cases＂.

关键词：卵巢癌分子遗传勘误基因失活

Fluctuation pressure on a bio-membrane confined within a parabolic potential well

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Acta Mechanica Sinica 2012年第4期28卷 1180-1185页

作者： l. B. Freund Department of Materials Science and Engineering University of Illinois at Urbana-Champaign

A compliant bio-membrane with a nominally fiat reference configuration is prone to random transverse deflections when placed in water, due primarily to the Brownian motion of the water molecules. On the average, these fluctuations result in a state of thermodynamic equilibrium between the entropic energy of the water and the total free en- ergy of the membrane. when the membrane is in close proximity to a parallel surface, that surface restricts the fluctuations of the membrane which, in turn, results in an increase in its free energy. The amount of that increase depends on the degree of confinement, and the resulting gradient in free energy with degree of confinement implies the existence of a confining pressure. In the present study, we assume that the confinement is in the form of a continuous parabolic po- tential well resisting fluctuation. Analysis leads to a closed form expression for the mean pressure resulting from this confinement, and the results are discussed within the broader context of results in this area. In particular, the results provide insights into the roles of membrane stiffness, number of degrees of freedom in the model of the membrane and other system parameters.

关键词： Statistical mechanics ' Membrane fluctuations Parabolic confinement. Confining pressure

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多模式风光火储系统多目标优化调度

华北电力大学学报（自然科学版） 2024年第5期51卷 100-107,117页

作者：吴庆泽吕丽霞刘长良刘卫亮华北电力大学控制与计算机工程学院河北保定071003

风光发电具有波动性和随机性,大规模并入电网影响电力系统的稳定性、安全性。建立考虑火电机组深度调峰和电储能寿命折损成本的风光火储能源系统模型,提出负荷跟踪、功率平滑两种出力模式。以风光火储各子系统出力为决策变量,建立了一... 详细信息

风光发电具有波动性和随机性,大规模并入电网影响电力系统的稳定性、安全性。建立考虑火电机组深度调峰和电储能寿命折损成本的风光火储能源系统模型,提出负荷跟踪、功率平滑两种出力模式。以风光火储各子系统出力为决策变量,建立了一种以风光火储能源系统运行成本最低、新能源消纳最多、环保性最好为目标的优化调度模型。通过NSGA-Ⅱ算法分别求解两种模式的调度模型,得到帕累托解集,最后基于AHP决策方法确定最优调度方案,实现能源系统出力跟踪负荷、能源系统功率平滑的功能,降低风光发电并入电网带来的冲击。仿真计算结果表明两种模式下的调度策略可以提高风光火储能源系统的经济性,增强新能源消纳能力,减少污染性气体排放,验证了优化调度模型的有效性。

关键词：风光火储能源系统负荷跟踪功率平滑优化调度 NSGA-Ⅱ AHP