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微创拔除双j管的临床分析(附17例报告)

现代泌尿外科杂志 2011年第2期16卷 143-144页

作者：陶维雄李辉明鞠文曾甫清长江航运总医院泌尿外科湖北武汉430010 华中科技大学同济医学院附属协和医院泌尿外科湖北武汉430022

目的探讨输尿管内双j管拔除困难的原因及临床防治方法。方法回顾分析17例输尿管内双j管拔管困难病例的临床处理方法。结果依据术前检查,针对不同病例情况,我们选择应用ESWL、URS、PCN及介入放射法等技术顺利拔管,均未见严重并发症。结... 详细信息

目的探讨输尿管内双j管拔除困难的原因及临床防治方法。方法回顾分析17例输尿管内双j管拔管困难病例的临床处理方法。结果依据术前检查,针对不同病例情况,我们选择应用ESWL、URS、PCN及介入放射法等技术顺利拔管,均未见严重并发症。结论正确置入双j管、建立完善告知及随访制度和采用药物干预是预防双j管拔管困难的关键措施,选择应用ESWL、URS、PCN及介入放射法等微创技术是首选的安全可行的方法。

关键词：双j管微创拔除

Magnetic Properties of Ni Nanoparticles and Ni(C) Nanocapsules

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journal of Materials Science & Technology 2002年第2期18卷 99-100页

作者： Z.j.Li G.H.wen 等 ShenyangNationalLaboratoryforMaterialsScienceandInternationalCentreforMaterialsPhysics InstituteofMetalResearchChineseAcademyofSciencesShenyang110016China DepartmentofPhysics H

Structure and magnetic properties of Ni nanoparticles and Ni(C) nanocapsules were studied. The carbon atoms hardly affect the lattice of Ni to form Ni-C solid solution or nickel carbides. The large thermal irreversibility in zero-field-cooled and zero-field magnetization curves indicates magnetic blocking with a wide energy barrier. Saturation magnetization, remanent magnetization and coercivity of Ni(C) nanocapsules decrease with increasing temperature.

关键词： Nanoparticles Nanocapsules Magnetic properties

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卵胎生硬骨鱼许氏平鲉繁殖生物学研究进展

中山大学学报（自然科学版）（中英文） 2025年第1期64卷 106-115页

作者：齐鑫杨欣琳温海深中国海洋大学水产学院山东青岛266003

卵胎生作为卵生向胎生进化的中间状态,具有子代成活率高的特性。因此,卵胎生许氏平鲉成为我国重要的北方海水养殖对象之一。然而,大量养殖该物种又带来了一些繁殖过程中的实际问题。比如,网箱养殖的亲鱼出现明显的交配失败,导致其子代... 详细信息

卵胎生作为卵生向胎生进化的中间状态,具有子代成活率高的特性。因此,卵胎生许氏平鲉成为我国重要的北方海水养殖对象之一。然而,大量养殖该物种又带来了一些繁殖过程中的实际问题。比如,网箱养殖的亲鱼出现明显的交配失败,导致其子代出生率极低;妊娠期亲鱼母胎器官发育障碍,导致仔鱼胎死腹中;早产、难产导致的亲鱼、仔鱼大量死亡等。本综述将针对上述问题,分别探讨许氏平鲉交配发生、妊娠维持及分娩启动相关的内分泌调控机制,以期为后续研究提供潜在思路,最终实现水产养殖问题的解决。

关键词：卵胎生许氏平鲉繁殖生理

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Coherent and semicoherent α/β interfaces in titanium: structure, thermodynamics, migration

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npj Computational Materials 2023年第1期9卷 146-156页

作者： Siqi Wang Tongqi wen jian Han David j.Srolovitz Department of Materials Science and Engineering City University of Hong KongHong Kong SARChina Department of Mechanical Engineering The University of Hong KongPokfulam RoadHong Kong SARChina

Theα/βinterface is central to the microstructure and mechanical properties of titanium *** investigate the structure,thermodynamics and migration of the coherent and semicoherent Tiα/βinterfaces as a function of temperature and misfit strain via molecular dynamics(MD)simulations,thermodynamic integration and an accurate,DFT-trained Deep *** structure of an equilibrium semicoherent interface consists of an array of steps,an array of misfit dislocations,and coherent *** determines the dislocation and step(disconnection)array structure and habit *** MD simulations show the detailed interface morphology dictated by intersecting disconnection *** steps are shown to facilitateα/βinterface migration,while the misfit dislocations lead to interface drag;the drag mechanism is different depending on the direction of interface *** results are used to predict the nature ofαphase nucleation on cooling through theα-βphase transition.

关键词： semicoherent microstructure interface

The Low-Carbon Transition of Energy Systems:A Bibliometric Review from an Engineering Management Perspective

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Engineering 2023年第10期29卷 147-158页

作者： Peng Zhou Yue Lv wen wen School of Economics and Management China University of PetroleumQingdao 266580China

As a major solution to climate change,the low-carbon transition of energy systems has received growing attention in the past *** paper presents a bibliometric review of the literature on the low-carbon transition of energy systems from an engineering management ***,the definition and boundaries of the energy system transition are clarified,covering transformation of the energy structure,decarbonization of fossil fuel utilization,and improvement in energy ***,a systematic search of the related literature and a bibliometric analysis are conducted to reveal the research *** is found that the number of related publications has been growing exponentially during the past decade,with researchers from China,the United Kingdom,the United States,Germany,and the Netherlands comprising the majority of *** studies with interdisciplinary characteristics appear in journals focusing on energy engineering,environmental science,and social science related to energy *** major research themes are identified by clustering the existing literature:(1)low-carbon transition pathways with different spatiotemporal scales and transition constraints;(2)low-carbon technology diffusion with a focus on renewable energy technologies,pollution control technologies,and other technologies facilitating the energy transition;(3)infrastructure network planning for energy systems covering various sectors and regions;and(4)transition-driving mechanisms from the political,economic,social,and natural *** four topics play distinct but mutually supportive roles in facilitating the low-carbon transition of energy systems,and require more in-depth research on designing resilient low-carbon transition pathways with coordinated goals,promoting low-carbon technologies with cost-effective and reliable infrastructure network deployment,and balancing multi-level risks in various ***,business models,nongovernment actors,energy justi

关键词： Low-carbon transition Energy system Bibliometric review Systematic review

Uptake and accumulation of copper by roots and shoots of maize( Zea mays L.)

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journal of Environmental Sciences 2001年第2期13卷 228-232页

作者： LIU Dong-hua j IANG Wu-sheng HOU wen-qiang Department of Biology College of Chemistry and Life SciencesTianjin Normal UniversityTianjin 300074China Library Tianjin Normal UniversityTianjin 300074China College of Life Sciences Nankai UniversityTianjin 300071China

The effects of different concentrations of copper sulfate on root and shoot growth of maize( Zea mays L.) and the uptake and accumulation of Cu2+ by its roots and shoots were investigated in the present study. The concentrations of copper sulfate (CuSO4 (.) 5H(2)O) used were in the range of 10(-5) -10(-3)mol/L. Root growth decreased progressively with increasing concentration of Cu2+ in solution. The seedlings exposed to 10(-3) mol/L Cu2+ exhibited substantial growth reduction, yielding only 68% of the root length of the control. The shoot growth of the seedlings grown at 10(-5) -10(-4) mol/L Cu2+ were more or less the same as the control seedlings. The leaves treated with 10(-3) mol/L Cu2+ were obviously inhibited in shoot growth. The fresh and dry weights both in roots and shots decreased progressively with increasing Cu2+ concentration. This fits well with the above mentioned effects of copper sulfate on root growth. Zea mays has considerable ability to remove Cu from solutions and accumulate it. The Cu content in roots of Z. mays increased with increasing solution concentration of Cu2+. The amount of Cu in roots of plants treated with 10(-3), 10(-4) and 10(-5) mol/L Cu2+ were 10, 8 and 1.5 fold, respectively, greater than that of roots of control plane. However, the plants transported and concentrated only a small amount of Cu in their shoots.

关键词： Zea mays L. uptake accumulation Cu^(2+)

Acoustic measurements of models of military style supersonic nozzle jets

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Chinese journal of Aeronautics 2014年第1期27卷 23-33页

作者： Ching-wen Kuo jérémy Veltin Dennis K.McLaughlin Department of Aerospace Engineering The Pennsylvania State UniversityUniversity Park TNO Science and Industry

Modern military aircraft jet engines are designed with variable-geometry nozzles to provide optimal thrust in different operating conditions, depending on the flight envelope. How- ever, acoustic measurements for such nozzles are scarce, due to the cost involved in making full- scale measurements and the lack of details about the exact geometries of these nozzles. Thus the present effort at Pennsylvania State University （PSU） in partnership with GE Aviation and the NASA Glenn Research Center is aiming to study and characterize the acoustic field produced by supersonic jets issuing from converging-diverging military style nozzles, and to identify and test promising noise reduction techniques. An equally important objective is to develop methodology for using data obtained from small- and moderate-scale experiments to reliably predict the full-scale engine noise. The experimental results presented show reasonable agreement between small-scale and medium-scale jets, as well as between heated jets and heat-simulated ones.

关键词： Aeroacoustics Acoustic noise measurement jet noise jets Nozzle Supersonic flow

PROXIMAL POINT ALGORITHM FOR MINIMIZATION OF DC FUNCTION

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journal of Computational Mathematics 2003年第4期21卷 451-462页

作者： wen-yuSun Raimundo.j.B.Sampaio M.A.B.Candido SchoolofMathematicsandComputerScience NanjingNormalUniversityNanjing2100g7China ProgramadePos-GraduacaoemInformaticaAplicada PontificiaUniversidadeCatolicadoParana(PUCPR)CEP:80215-g01CuritibaPRBrazil ProgramadePos-GraduacaoemInformaticaAplicada PontificiaUniversidadeCatolicadoParana(PUCPR)CEP:80215-g01CuritibaPRBrazil

In this paper we present some algorithms for minimization of DC function (difference of two convex functions). They are descent methods of the proximal-type which use the convex properties of the two convex functions separately. We also consider an approximate proximal point algorithm. Some properties of the ε-subdifferential and the ε-directional derivative are discussed. The convergence properties of the algorithms are established in both exact and approximate forms. Finally, we give some applications to the concave programming and maximum eigenvalue problems.

关键词： Nonconvex optimization Nonsmooth optimization DC function Proximal point algorithm ε-subgradient.

乳腺癌外周血微转移与微血管密度相关性研究及临床意义

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南昌大学学报（医学版） 2014年第5期54卷 33-36页

作者：卫文俊王玉蓉陶霖玉齐柯陈天文张好云冯铎广东医学院附属南山医院甲乳外科广东深圳518052

目的研究乳腺癌外周血微转移与相应肿瘤组织微血管生成的关系,并探讨其临床意义。方法采用逆转录聚合酶链反应(RT-PCR)方法,对50例乳腺癌(乳癌组)及30例乳腺良性肿瘤患者(对照组)外周血中乳腺上皮黏蛋白(small breast epithelial mucin,... 详细信息

目的研究乳腺癌外周血微转移与相应肿瘤组织微血管生成的关系,并探讨其临床意义。方法采用逆转录聚合酶链反应(RT-PCR)方法,对50例乳腺癌(乳癌组)及30例乳腺良性肿瘤患者(对照组)外周血中乳腺上皮黏蛋白(small breast epithelial mucin,SBEM)表达情况进行检测;采用免疫组织化学法,用CD105标记肿瘤新生血管,计数乳腺癌和乳腺良性肿瘤组织微血管密度(MVD);分析其相关性及与临床病理特征之间的关系。结果乳癌组SBEM的阳性表达率为36%(18/50),高于对照组的0.0%(0/30)(P<0.05);乳癌组MVD值为24.56±4.12,高于对照组的8.61±2.87(P<0.05);乳癌组SBEM表达与MVD计数呈正相关(r=0.712,P<0.05),与TNM分期、淋巴结转移密切相关(P<0.05);乳癌组MVD计数与肿瘤大小、淋巴结转移、TNM分期有关(P<0.05)。结论乳腺癌外周血微转移与相应癌组织微血管密度密切相关,MVD较高者更易发生外周血微转移,并与肿瘤的发生、发展和转移有关。

关键词：乳腺癌乳腺上皮黏蛋白微转移微血管密度