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基于区间规划方法的不确定性物流网络模型研究

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物流技术 2014年第10期33卷 266-268,295页

作者：苗慧浙江长征职业技术学院浙江杭州310023

从物流网络的不确定影响因素入手,建立不确定物流网络模型。采用区间规划方法对不确定物流网络模型进行求解,探究不同决策系数及不同最大偏差对物流网络模型的影响。结果发现:风险系数的增加,导致目标函数区间解的上下界增加,最大偏差... 详细信息

从物流网络的不确定影响因素入手,建立不确定物流网络模型。采用区间规划方法对不确定物流网络模型进行求解,探究不同决策系数及不同最大偏差对物流网络模型的影响。结果发现:风险系数的增加,导致目标函数区间解的上下界增加,最大偏差的增加,则导致目标函数区间解的不确定性扩大。

关键词：物流网络模型不确定性区间规划

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微通道传热用于火焰筒壁面冷却的性能

燃气涡轮试验与研究 2013年第4期26卷 18-21,43页

作者：苗辉中航空天发动机研究院有限公司北京100028

对微通道传热应用于航空发动机火焰筒冷却进行了探索。构造了简单微通道模型,其上下平面分别代表火焰筒内外壁面;用工程方法计算火焰筒壁面的热环境作为计算模型的边界条件,以Fluent为工具模拟微通道换热结构的冷却性能;涉及两种长径比(... 详细信息

对微通道传热应用于航空发动机火焰筒冷却进行了探索。构造了简单微通道模型,其上下平面分别代表火焰筒内外壁面;用工程方法计算火焰筒壁面的热环境作为计算模型的边界条件,以Fluent为工具模拟微通道换热结构的冷却性能;涉及两种长径比(20,40)和三种火焰筒压降(2.0%,2.5%,3.0%)。结果表明,含有微通道换热结构的火焰筒,能以较少的冷却气量维持较低的壁面温度;冷却气流吸热后升温明显,冷量利用率可达40%;冷却气量受长径比影响显著,受火焰筒压降影响不大;火焰筒壁面沿流向的温度梯度非常大。

关键词：航空发动机燃烧室微通道传热火焰筒冷却

Optical trapping-enhanced probes designed by a deep learning approach

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Photonics Research 2024年第5期12卷 959-968页

作者： miao PENG GUANGZONG XIAO XINLIN CHEN TE DU TENGFANG KUANG XIANG HAN WEI XIONG GANGYI ZHU JUNBO YANG ZHONGQI TAN KAIYONG YANG hui LUO College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China College of Electronic Information and Physics Central South University of Forestry and TechnologyChangsha 410004China Nanhu Laser Laboratory National University of Defense TechnologyChangsha 410021China Center of Material Science National University of Defense TechnologyChangsha 410073China College of Communication and Information Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China

Realizing optical trapping enhancement is crucial in biomedicine,fundamental physics,and precision *** the metamaterials with artificially engineered permittivity as photonic force probes in optical tweezers will offer unprecedented opportunities for optical trap ***,it usually involves multi-parameter optimization and requires lengthy calculations;thereby few studies remain despite decades of research on optical ***,we introduce a deep learning(DL)model to attack this *** DL model can efficiently predict the maximum axial optical stiffness of Si∕Si_(3)N_(4)(SSN)multilayer metamaterial nanoparticles and reduce the design duration by about one order of *** experimentally demonstrate that the designed SSN nanoparticles show more than twofold and fivefold improvement in the lateral(k_(x)and k_(y))and the axial(k_(z))optical trap stiffness on the high refractive index amorphous TiO_(2)*** the DL model in optical manipulation systems will expedite the design and optimization processes,providing a means for developing various photonic force probes with specialized functional behaviors.

关键词： trapping optimization stiffness

Winter extreme precipitation over the Tibetan Plateau influenced by Arctic sea ice on interdecadal timescale

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Advances in Climate Change Research 2024年第1期15卷 42-51页

作者： Qing-Quan LI miao BI Song YANG Qing-Yuan WU Yi-hui DING Xin-Yong SHEN Xiao-Ting SUN Meng-Chu ZHAO China Meteorological Administration Key Laboratory for Climate Prediction Studies National Climate CentreBeijing 100081China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjing 210044China CMA Key Open Laboratory of Transforming Climate Resources to Economy Chongqing Institute of Meteorological SciencesChongqing 401147China School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies Sun Yat-sen University Zhuhai 519082China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China

The Tibetan Plateau(TP)and the Arctic are the most sensitive regions to global climate ***,the interdecadal varibility of winter extreme precipitation over the TP and its linkage with Arctic sea ice are still *** this study,the characteristics and mechisnems of the TP extreme precipitation(TPEP)influenced by Arctic sea ice on interdecadal timescale are studied based on the daily precipitation,monthly sea ice concentration and ERA5 reanalysis data from 1980 to *** found that the dominant mode of the TPEP in winter mostly exhibits a uniform spatial variation on the interdecadal timescale,with an opposite weak variation in the southeastern TP,and the Arctic sea ice concentration(SIC)before 2002 are larger than that after *** interdecadal variation of TPEP is affected by two teleconnection wave trains regulated by the Barents and Kara Sea *** the light ice years,a remarkable positive geopotential height(HGT)anomaly appears over the Barents-Kara Sea and a remarkable negative HGT anomaly is located over the Lake *** wave trains originating over the Barents-Kara Sea can be *** southern branch forms a wave train through the North Atlantic along the subtropical westerly jet stream,showing a‘+-+-+'pattern of HGT anomalies from Arctic to the *** HGT anomaly controls the western TP,which creates dynamic and water vapor conditions for the *** northern branch forms a wave train through the Lake Baikal and the southeast of the TP,showing a‘+-+'HGT anomaly *** HGT anomaly controls the southeastern TP,which is not conducive to precipitation in the *** the SIC in the Barents-Kara Sea increases,the situation is *** above analysis also reveals the reason for the difference in the east-west distribution of the TPEP.

关键词： Arctic sea ice Tibetan Plateau Winter extreme precipitation Rossby wave activity Interdecadal variation

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獐子岛附近海域溶解有机物的荧光特征

光谱学与光谱分析 2012年第4期32卷 1007-1011页

作者：周楠赵卫红苗辉中国科学院海洋研究所海洋生态与环境科学重点实验室山东青岛266071 中国科学院研究生院北京100049

利用平行因子分析(PARAFAC)模型对三维荧光光谱(EEMs)进行解析,研究了獐子岛附近海域不同季节荧光溶解有机物(DOM)荧光的组成特点及分布变化。调查水域在不同季节的DOM荧光组成基本一致,包含类腐殖质荧光组分C1(265/440nm),C2(410～450/... 详细信息

利用平行因子分析(PARAFAC)模型对三维荧光光谱(EEMs)进行解析,研究了獐子岛附近海域不同季节荧光溶解有机物(DOM)荧光的组成特点及分布变化。调查水域在不同季节的DOM荧光组成基本一致,包含类腐殖质荧光组分C1(265/440nm),C2(410～450/520～550nm)和类蛋白荧光组分C3(230,280/330nm),且三者有很好的相关性,表明它们有着相同的来源或彼此间存在某种关系。各组分在不同季节不同水层的分布有在獐子岛周围海域荧光强度相对较大的共同点。通过对各组分与叶绿素a和盐度变化的关系研究发现,调查海区OM受现场浮游植物和人类生产活动的共同作用。分析结果有效的证明了EEMs与PARAFAC相结合对DOM荧光进行分析鉴别的可行性。

关键词：溶解有机物三维荧光光谱平行因子分析獐子岛

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一种支持悬赏的匿名电子举报方案

电子学报 2008年第2期36卷 320-324页

作者：苗付友王行甫苗辉熊焰中国科学技术大学计算机系安徽合肥230027

本文针对举报系统应该有效保护和激励举报人等应用需求,基于环签名和环签密提出了一种支持悬赏的匿名电子举报方案.该方案能够通过身份模糊性有效保护举报人,通过举报内容的机密性、举报的不可传递性以及第三方不可伪造性确保举报信息... 详细信息

本文针对举报系统应该有效保护和激励举报人等应用需求,基于环签名和环签密提出了一种支持悬赏的匿名电子举报方案.该方案能够通过身份模糊性有效保护举报人,通过举报内容的机密性、举报的不可传递性以及第三方不可伪造性确保举报信息的安全,并通过举报人身份的自证明性为悬赏机制提供支持.分析表明,该方案能够有效满足此类电子举报系统的应用需求.

关键词：举报系统身份模糊自证明性环签密

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兖州煤田地表温度空间分异特征

煤炭学报 2018年第9期43卷 2595-2604页

作者：李晶苗辉杨震韩颖中国矿业大学(北京)地球科学与测绘工程学院北京100083

以东部高潜水位区域——兖州煤田为研究区,以Landsat TM数据为数据源,利用单窗算法反演兖州煤田地表温度,分别从土地利用类型、植被覆盖度、距沉陷积水区边缘距离、地表下沉值等4个方面分析研究区地表温度的空间分异特征。结果表明:不... 详细信息

以东部高潜水位区域——兖州煤田为研究区,以Landsat TM数据为数据源,利用单窗算法反演兖州煤田地表温度,分别从土地利用类型、植被覆盖度、距沉陷积水区边缘距离、地表下沉值等4个方面分析研究区地表温度的空间分异特征。结果表明:不同土地利用类型间地表温度差异较大,其中建设用地平均温度最高,水体平均温度最低;地表温度与植被覆盖度呈负相关;在沉陷积水区以外,地表温度随距积水区边缘距离的增加先降低,而后趋于稳定,两者呈指数相关;地表温度自积水区边缘向外随地表下沉值的减小而逐渐降低。

关键词：地表温度单窗算法兖州煤田空间分异生态影响边界

骨水泥型与生物型髋关节假体置入修复老年不稳定股骨转子间骨折的疗效及安全性:前瞻性、非随机对照临床试验

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中国组织工程研究 2017年第15期21卷 2308-2313页

作者：于铁淼苗会玲哈励逊国际和平医院骨病科河北省衡水市053000 哈励逊国际和平医院体检科河北省衡水市053000

背景:由于不稳定股骨转子间骨折患者的年龄较大,身体功能逐渐退化加之此类疾病的复位固定较为困难,因此人工髋关节置换是治疗老年不稳定股骨转子间骨折的主要外科治疗方法之一。目的:观察骨水泥型与生物型髋关节假体置入修复老年不稳定... 详细信息

背景:由于不稳定股骨转子间骨折患者的年龄较大,身体功能逐渐退化加之此类疾病的复位固定较为困难,因此人工髋关节置换是治疗老年不稳定股骨转子间骨折的主要外科治疗方法之一。目的:观察骨水泥型与生物型髋关节假体置入修复老年不稳定股骨转子间骨折的疗效及安全性。方法:试验为前瞻性、单中心、非随机对照临床试验,在中国河北省哈励逊国际和平医院完成。选取不稳定股骨转子间骨折老年患者86例,均进行人工髋关节置换,对照组44例采用德国Link公司骨水泥型SPⅡ假体置换,试验组42例采用美国Zimmer公司Wagner生物型假体置换,随访6个月。试验的主要观察指标为以置换后6个月的髋关节Harris评分优良率以评估髋关节功能恢复情况;次要观察指标为置换前,置换后1,3,6个月髋关节Harris评分变化及髋关节X射线形态变化,术中出血量及手术时间,置换后1个月评估置换后输血量、下床活动时间及置换后引流量变化,置换后6个月不良反应发生率评估安全性。目前已获得的部分试验结果显示,试验组患者的置换后输血量及置换后引流量均高于对照组(P0.05),对照组出现骨水泥中毒4例。试验经中国河北省哈励逊国际和平医院伦理委员会批准[(院)2013-37)]。研究符合世界医学会制定的《赫尔辛基宣言》的要求。参与者对治疗方案和过程均知情同意,并签署知情同意书。讨论:试验于2014年1月开始病例收集,预计2017年12月试验结束。目前临床应用于老年患者的髋关节假体主要有骨水泥型与生物型假体2种类型。试验希望明确骨水泥型假体和生物型假体置入修复不稳定股骨转子间骨折老年患者效果的差异,以期为老年不稳定股骨转子间骨折的髋关节置换假体选择提供临床依据。试验部分结果显示,骨水泥型和生物型髋关节置换假体置入修复老年不稳定股骨转子间骨折疗效及安全性均较好,但骨水泥型假体置换后存在骨水泥中毒的风险。

关键词：组织工程髋关节股骨骨科植入物人工假体临床试验不稳定股骨转子间骨折骨水泥型假体生物型假体老年疗效安全性 Harris评分

Efficacy of spray flushing in the reprocessing of flexible endoscopes:A randomized controlled trial

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World Journal of Gastroenterology 2024年第31期30卷 3680-3688页

作者： Jiang Du miao Zhang Si-Yuan Tao Lian-Song Ye hui Gong Bing Hu Qiong-Ying Zhang Fu Qiao Department of Gastroenterology and Hepatology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina West China School of Nursing Sichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Infection Control West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Digestive Endoscopy Medical Engineering Research Laboratory West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Commonly used cleaning brushes in the reprocessing of flexible endoscopes often cause damage within the working *** To develop a spray flushing system to achieving effective cleaning of the working channels while minimizing *** This prospective study included 60 used endoscopes and 60 Teflon tubes randomly divided into a control group(n=30)and an experimental group(n=30).The material of Teflon tubes was the same as that of the endoscope working *** in the control group were manually cleaned using traditional cleaning brushes,while those in the experimental group were cleaned using the newly developed spray flushing *** levels,cleanliness,and microbiological testing of the working channels were ***,Teflon tubes in the control group underwent 500 passes with a cleaning brush,while those in the experimental group were subjected to the spray flushing system,and channel damage was *** The ATP levels(RLU)in the two groups were 32.5(13-66)and 26(16-40),respectively(P>0.05).Cleanliness scores were 1.5(1-2)and 1(1-2),respectively(P>0.05).Debris was found in 73.3%of the control group,which was significantly higher than 46.7%in the experimental group(P<0.05).Microbiological tests for both groups yielded negative *** tube damage in the control group was rated at 4(4-5.25),which was significantly higher than in the experimental group 4(3-4)(P<0.01).CONCLUSION The spray flushing system demonstrated superior efficacy in removing debris and resulted in less damage to the endoscope working channels compared with traditional cleaning brushes.

关键词： Endoscope ATP Flexible endoscope Disinfection Reprocessing