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精液分析标准化刻不容缓

中华男科学杂志 2005年第2期11卷 83-84页

作者：黄宇烽 philip s.li 南京军区南京总医院生殖遗传研究室江苏南京210002 Center for Male Reproductive Medicine and Microsurgery Cornell Institute for Reproductive Medicine

精液分析,特别是精子计数,仍是评估男性生育能力的最基本测试.尽管推荐使用牛鲍氏(Neubauer)血细胞计数板作为精液分析的工具,并且建议了质量控制(QC)方法[1],但是,据Keel等[2]报告,对超过530家男科学实验室就精子密度、形态学、存活率... 详细信息

精液分析,特别是精子计数,仍是评估男性生育能力的最基本测试.尽管推荐使用牛鲍氏(Neubauer)血细胞计数板作为精液分析的工具,并且建议了质量控制(QC)方法[1],但是,据Keel等[2]报告,对超过530家男科学实验室就精子密度、形态学、存活率及抗精子抗体的室间质量控制调查结果显示,同1份精液样本的精子密度差异范围达3～492×106/ml,手工检测的变异系数(CV)为30%～138%,计算机辅助的精液分析(CAsA)的CV为24%～99%.

关键词：精液分析标准化

Dynamic Event-Triggered Consensus Control for Input Constrained Multi-Agent systems With a Designable Minimum Inter-Event Time

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IEEE/CAA Journal of Automatica sinica 2024年第3期11卷 649-660页

作者： Meilin li Yue Long Tieshan li Hongjing liang C.L.philip Chen the school of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China IEEE the Yangtze Delta Region Institute University of Electronic Science and Technology of ChinaHuzhou 313000 the Laboratory of Electromagnetic space Cognition and Intelligent Control Beijing 100089China the school of Computer science and Engineering South China University of TechnologyGuangzhou 510006

This paper investigates the consensus control of multi-agent systems(MAss) with constrained input using the dynamic event-triggered mechanism(ETM).Consider the MAss with small-scale networks where a centralized dynamic ETM with global information of the MAss is first ***,a distributed dynamic ETM which only uses local information is developed for the MAss with large-scale *** is shown that the semi-global consensus of the MAss can be achieved by the designed bounded control protocol where the Zeno phenomenon is eliminated by a designable minimum inter-event *** addition,it is easier to find a trade-off between the convergence rate and the minimum inter-event time by an adjustable ***,the results are extended to regional consensus of the MAss with the bounded control *** simulations show the effectiveness of the proposed approach.

关键词： Constrained input designable minimum inter-event time directed communication topology dynamic event-triggered mechanism MAss consensus control

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中国的男性包皮环切术与艾滋病预防

中华男科学杂志 2008年第3期14卷 195-196页

作者：吕年青李石华黄翼然江苏省计划生育科学技术研究所江苏南京210036 Center for Male Reproductive Medicine and Microsurgery Comell Institute for Reproductive MedicineDepartment of UrologyThe New York Presbyterian HospitalWeill Medical College of Comell UniversityNew YorkNY 10065-4870USA 上海交通大学医学院附属仁济医院泌尿科上海200127

2008年2月25日，中华医学会男科学分会主任委员朱积川教授带领男科学分会候任主任委员王晓峰教授、副主任委员黄宇烽教授、黄翼然教授、姜辉教授、邓春华教授，《中华男科学杂志》编辑部主任商学军副教授，

关键词：包皮环切术 HIV感染性传播疾病免疫学

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显微外科手术治疗男性不育

中国男科学杂志 2007年第3期21卷 64-66页

作者： Jonathan D.schiff philip s.li Marc Goldstein 黄翼然刘毅东 Department of UrologyMount sinai school of MedicineMount sinai Medical Center Center for Male Reproductive Medicine and MicrosurgeryDepartment of UrologyWeill Cornell Medical College of Cornell University 上海交通大学附属仁济医院泌尿科

男性不育可以简单的分为精子产生障碍（睾丸衰竭）与精子运输障碍（梗阻性）。在所有由于梗阻性因素引起的男性不育，以及很大一部分由于精子生成障碍引起的男性不育病例中都需要手术干预。本文将介绍的手术方案包括精索静脉曲张手术、... 详细信息

男性不育可以简单的分为精子产生障碍（睾丸衰竭）与精子运输障碍（梗阻性）。在所有由于梗阻性因素引起的男性不育，以及很大一部分由于精子生成障碍引起的男性不育病例中都需要手术干预。本文将介绍的手术方案包括精索静脉曲张手术、精道梗阻重建术以及用于辅助生育技术的取精子术。在大多数可适用的情况下，我们使用药物治疗作为提高生育率的最初选择，或者作为提高取精子成功率的辅助方法。在过去的10-15年里，治疗男性不育的技术发展迅速，现在大部分病例都可以成功治愈。我们可以纠正由于精索静脉曲张引起的精子生成障碍，可以解决梗阻性无精子症，也可以通过取精子术结合体外受精技术治疗无精子症。

关键词：显微外科手术不育,男性输精管吻合术精索静脉曲张取精术

如何成为合格的泌尿男科显微外科医生：美国康奈尔大学威尔医学院的学习经历

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中华男科学杂志 2014年第7期20卷 595-604页

作者：赵福军彭靖李石华 Richard Lee Marc Goldstein 上海交通大学附属第一人民医院泌尿外科上海200080 北京大学第一医院男科中心北京100034 Center for Male Reproductive Medicine and Microsurgery Department of UrologyWeill Cornell Medical College of Cornell UniversityNew YorkNY 10065 USA

泌尿男科显微外科是泌尿外科中发展最快的的亚专业。随着男科患者数量增多,新型医疗技术的发展,最近20年男性显微外科的飞速发展,使众多男性不育患者得到有效治疗。男科的发展备受关注,对男科医师的需求越来越急迫。国内泌尿男科显微外... 详细信息

泌尿男科显微外科是泌尿外科中发展最快的的亚专业。随着男科患者数量增多,新型医疗技术的发展,最近20年男性显微外科的飞速发展,使众多男性不育患者得到有效治疗。男科的发展备受关注,对男科医师的需求越来越急迫。国内泌尿男科显微外科虽然取得一定的成绩,但有别于普通泌尿外科的培养学习曲线,如何成为合格的、规范的专业男科显微外科医师不是简单的事情,目前国内没有现成的培养模式可循。美国康奈尔大学男性生殖医学和显微外科中心建立并规范专科泌尿/男科医生培训项目,男性不育显微外科是对体力、脑力和技术的挑战,首先必须在显微外科实验室进行正规培训,为今后临床工作奠定坚实基础。通过作者在康奈尔大学显微男科培训中心的学习经历,将实验室各项系统的、专业的显微外科培训中细节和基本原则,从专业定位、知识储备、技能训练、临床积累等方面进行阐述,希望为国内培养合格的男科显微外科医师提供正确的思路和方法。

关键词：男性不育显微外科外科培训学习曲线

Tribological behavior of lubricant-impregnated porous polyimide

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Friction 2024年第4期12卷 711-725页

作者： Jinbang li Ningning ZHOU Janet s.s.WONG school of Mechanical Engineering and Mechanics Ningbo UniversityNingbo 315211China Beijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms Beijing Institute of Control EngineeringBeijing 100029China Department of Mechanical Engineering Imperial College LondonLondon SW72AZUK

Porous materials impregnated with lubricants can be used in conditions where limited lubricant is *** this work,three porous polyimides(PPI)with different densities were ***(PAO)impregnated PPI(iPPI)discs were rubbed against steel and sapphire *** operando observations of the iPPI-sapphire contacts show that oil is released under an applied load,forming a meniscus around *** at the outlet is created at high sliding *** amount of released oil increases with increasing PPI *** moduli,E*,estimated based on the actual contact size show that trapped oil in iPPIs contributes to load *** higher speeds,tribological rehydration of the contact occurs in low density iPPI,with that E*rises with *** high density PPIs,high speeds give a constantly high E*which is.limited by the viscoelastic properties of the PPI network and possibly the rate of oil *** of iPPI-steel contacts is governed by the mechanical properties of the PPI,the flow of the lubricant,and the roughness of the PPI *** low-and medium-density(highly porous,high roughness)PPIs,large amount of oil is released,and lubrication is mainly via lubricant restricted in the contact in the pores and possibly tribological *** high density(low porosity)PPI,with lower roughness,hydrodynamic lubrication is achieved which gives the lowest *** results show that polymeric porous materials for effective lubrication require the optimization of its surface roughness,stiffness,oil flow,and oil retentions.

关键词： polyimide porous material friction mechanism polymer limited lubrication

Hydromechanical characterization of gas transport amidst uncertainty for underground nuclear explosion detection

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第6期16卷 2019-2032页

作者： Wenfeng li Chelsea W.Neil J William Carey Meng Meng Luke P.Frash philip H.stauffer Earth and Environmental sciences Los Alamos National LaboratoryLos AlamosNM87544USA Department of Mineral Engineering New Mexico TechSocorroNM87801USA

Given the challenge of definitively discriminating between chemical and nuclear explosions using seismic methods alone,surface detection of signature noble gas radioisotopes is considered a positive identification of underground nuclear explosions(UNEs).However,the migration of signature radionuclide gases between the nuclear cavity and surface is not well understood because complex processes are involved,including the generation of complex fracture networks,reactivation of natural fractures and faults,and thermo-hydro-mechanical-chemical(THMC)coupling of radionuclide gas transport in the *** this study,we provide an experimental investigation of hydro-mechanical(HM)coupling among gas flow,stress states,rock deformation,and rock damage using a unique multi-physics triaxial direct shear rock testing *** testing system also features redundant gas pressure and flow rate measurements,well suited for parameter uncertainty *** porous tuff and tight granite samples that are relevant to historic UNE tests,we measured the Biot effective stress coefficient,rock matrix gas permeability,and fracture gas permeability at a range of pore pressure and stress *** Biot effective stress coefficient varies from 0.69 to 1 for the tuff,whose porosity averages 35.3%±0.7%,while this coefficient varies from 0.51 to 0.78 for the tight granite(porositys an underestimate).Matrix gas permeability is strongly correlated to effective stress for the granite,but not for the porous *** experiments reveal the following key engineering implications on transport of radionuclide gases post a UNE event:(1)The porous tuff shows apparent fracture dilation or compression upon stress changes,which does not necessarily change the gas permeability;(2)The granite fracture permeability shows strong stress sensitivity and is positively related to shear displacement;and(3)Hydromechanical coupling among stress states,rock damage,and gas flow appears to be

关键词： Underground nuclear explosion uncertainty quantification Radionuclide transport Biot effective stress coefficient Fracture permeability Matrix permeability

Editorial for the special Issue on Emerging Technology and Advanced Application of Nondestructive Detection for Power Equipment

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Chinese Journal of Electrical Engineering 2024年第1期10卷 1-2页

作者： li J. Mei H. li s. Tianjin University China Tsinghua shenzhen International Graduate school China Lanzhou Jiaotong University China

The rapid development of clean and renewable energy technologies represented by wind and solar energy,as well as the continuous growth of load demand,have put forward higher requirements for the safe operation of the power *** performance of power equipment based on traditional dielectric materials is often limited by various defects generated during molding,transportation,assembly,and operation,which cannot meet the reliability requirements of power systems in the new *** detection is an essential technical method in industrial development,which can detect and evaluate the defect and damage status of in-service equipment,key components,and materials without damaging the object.

关键词： service Application operation

Distinct vibrational signatures and complex phase behavior in metallic oxygen

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Matter and Radiation at Extremes 2024年第2期9卷 4-11页

作者： philip Dalladay-simpson Bartomeu Monserrat li Zhang Federico Gorelli Center for High Pressure science Technology Advanced Research 1690 Cailun RoadShanghai 201203China Department of Materials science and Metallurgy University of Cambridge27 Charles Babbage RoadCambridge CB3 OFSUnited Kingdom Cavendish Laboratory University of CambridgeJ.J.Thomson AvenueCambridge CB3 OHEUnited Kingdom Istituto Nazionale di Ottica Consiglio Nazionale delle Ricerche(CNR-INO)50125 FlorenceItaly shanghai Advanced Research in Physical sciences(sHARPs) ShanghaiChina

Evidence for metallization in dense oxygen has been reported for over 30 years[Desgreniers et al.,***.94,1117(1990)]at a now routinely accessible 95 GPa[shimizu et al.,Nature 393,767(1998)].However,despite the longevity of this result and the technological advances since,the nature of the metallic phase remains poorly constrained[Akahama et al.,***.74,4690(1995);Goncharov et al.,***.B 68,224108(2003);Ma,***.B 76,064101(2007);and Weck et al.,***.102,255503(2009)].In this work,through Raman spectroscopy,we report the distinct vibrational characteristics of metallicζ-O_(2) from 85 to 225 *** comparison with numerical simulations,weﬁnd reasonable agreement with the candidate structure up to about 150 *** higher pressures,the C2/mstructure is found to be unstable and incompatible with experimental *** candidate structures,and Ci,with C2/m C2/conly two molecules in the primitive unit cell,are found to be stable and more compatible with measurements above 175 GPa,indicative of the dissociation of(O_(2))4 ***,we report and discuss a strong hysteresis and metastability with the precursory phaseϵ-O_(2).Theseﬁndings will reinvigorate experimental and theoretical work into the dense oxygen system,which will have importance for oxygen-bearing chemistry,prevalent in the deep Earth,as well as fundamental physics.

关键词： metallic phase vibrational