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文章速递海外X工程项目属地化人力资源管理 认领
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作者 谭洪波 《工程建设与设计》 2021年第1期191-193,共3页
以海外某国项目工程为例进行论述,结合该国法律法规以及用工制度等内容,分析工程属地化人力资源管理存在的主要问题,从项目管理、人才聘用与管理制度方面着手,在人才招聘、人才管理、考评与激励制度以及团队协作方面加强措施,强化海外... 以海外某国项目工程为例进行论述,结合该国法律法规以及用工制度等内容,分析工程属地化人力资源管理存在的主要问题,从项目管理、人才聘用与管理制度方面着手,在人才招聘、人才管理、考评与激励制度以及团队协作方面加强措施,强化海外工程项目属地化管理,以提升自身管理能力以及市场竞争力,进而在海外工程项目管理中提供相关经验。 展开更多
关键词 人力资源管理 海外工程 属地化
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Erosion-corrosion and its mitigation on the internal surface of the expansion segment of N80 steel tube 认领
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作者 Tan Shang Xian-kang Zhong +2 位作者 Chen-feng Zhang Jun-ying Hu Bálint Medgyes 《矿物冶金与材料学报:英文版》 SCIE EI CAS 2021年第1期98-110,共13页
We investigated erosion-corrosion(E-C) and its mitigation on the internal surface of the expansion segment of N80 steel tube in a loop system using array electrode technique, weight-loss measurement, computational-flu... We investigated erosion-corrosion(E-C) and its mitigation on the internal surface of the expansion segment of N80 steel tube in a loop system using array electrode technique, weight-loss measurement, computational-fluid-dynamics simulation, and surface characterization techniques.The results show that high E-C rates can occur at locations where there is a high flow velocity and/or a strong impact from sand particles, which results in different E-C rates at various locations.Consequently, it can be expected that localized corrosion often occurs in such segments.The E-C rate at each location in the expansion segment can be significantly mitigated with an imidazoline derivative inhibitor, as the resulting inhibitor layer significantly impedes the electrochemical reaction rate.However, we found that this inhibitor layer could not effectively reduce the difference in the erosion rates at different locations on the internal surface of the expansion segment.This means that localized corrosion can still occur at the expansion segment despite the presence of the inhibitor. 展开更多
关键词 EROSION-CORROSION expansion segment array electrode technique INHIBITOR localized corrosion
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Probabilistic Model of Cumulative Damage in Pipelines Using Markov Chains 认领
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作者 Francisco Casanova-del-Angel Esteban Flores-Méndez Karina Guadalupe Cortes-Yah 《应用数学与应用物理(英文)》 2020年第4期620-642,共23页
This paper presents a probabilistic model of cumulative damage based on Markov chains theory to model propagation of internal corrosion depth localized in a hydrocarbons transport pipeline. The damage accumulation mec... This paper presents a probabilistic model of cumulative damage based on Markov chains theory to model propagation of internal corrosion depth localized in a hydrocarbons transport pipeline. The damage accumulation mechanism is unit jump type, depending on the state. It uses a shock model based on Bernoulli trials and probabilities to remain in the same state or the next one. Data are adjusted to Lognormal distribution and proven with a Kolmogórov-Smirnov test. The vector obtained from multiplying the initial state vector with the transition matrix was developed and the system of equations to find each transition probability with a single inspection report was solved. In order to calculate propagation of internal corrosion after inspection, an exponential equation was proposed and a parameter was adjusted to the data. Time to expected failure was obtained by adding the time expected in each damage state. Each time step was adjusted to real time. 展开更多
关键词 LOCALIZED Corrosion CUMULATIVE Damage FAILURE Pipelines MARKOV CHAINS
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文章速递Novel localized wave solutions of the (2+1)-dimensional Boiti–Leon–Manna–Pempinelli equation 认领
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作者 Li Sun Jiaxin Qi Hongli An 《理论物理通讯:英文版》 SCIE CAS CSCD 2020年第12期105-115,共11页
Based on a special transformation that we introduce,the N-soliton solution of the(2+1)-dimensional Boiti–Leon–Manna–Pempinelli equation is constructed.By applying the long wave limit and restricting certain conjuga... Based on a special transformation that we introduce,the N-soliton solution of the(2+1)-dimensional Boiti–Leon–Manna–Pempinelli equation is constructed.By applying the long wave limit and restricting certain conjugation conditions to the related solitons,some novel localized wave solutions are obtained,which contain higher-order breathers and lumps as well as their interactions.In particular,by choosing appropriate parameters involved in the N-solitons,two interaction solutions mixed by a bell-shaped soliton and one breather or by a bell-shaped soliton and one lump are constructed from the 3-soliton solution.Five solutions including two breathers,two lumps,and interaction solutions between one breather and two bell-shaped solitons,one breather and one lump,or one lump and two bell-shaped solitons are constructed from the4-soliton solution.Five interaction solutions mixed by one breather/lump and three bell-shaped solitons,two breathers/lumps and a bell-shaped soliton,as well as mixing with one lump,one breather and a bell-shaped soliton are constructed from the 5-soliton solution.To study the behaviors that the obtained interaction solutions may have,we present some illustrative numerical simulations,which demonstrate that the choice of the parameters has a great impacts on the types of the solutions and their propagation properties.The method proposed can be effectively used to construct localized interaction solutions of many nonlinear evolution equations.The results obtained may help related experts to understand and study the interaction phenomena of nonlinear localized waves during propagations. 展开更多
关键词 Boiti-Leon-Manna-Pempinelli equation Hirota bilinear method localized interaction wave solution
Photocurrent improvement of an ultra-thin silicon solar cell using the localized surface plasmonic effect of clustering nanoparticles 认领
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作者 F Sobhani H Heidarzadeh H Bahador 《中国物理B:英文版》 SCIE EI CAS CSCD 2020年第6期532-537,共6页
The cluster-shaped plasmonic nanostructures are used to manage the incident light inside an ultra-thin silicon solar cell.Here we simulate spherical,conical,pyramidal,and cylindrical nanoparticles in a form of a clust... The cluster-shaped plasmonic nanostructures are used to manage the incident light inside an ultra-thin silicon solar cell.Here we simulate spherical,conical,pyramidal,and cylindrical nanoparticles in a form of a cluster at the rear side of a thin silicon cell,using the finite difference time domain(FDTD)method.By calculating the optical absorption and hence the photocurrent,it is shown that the clustering of nanoparticles significantly improves them.The photocurrent enhancement is the result of the plasmonic effects of clustering the nanoparticles.For comparison,first a cell with a single nanoparticle at the rear side is evaluated.Then four smaller nanoparticles are put around it to make a cluster.The photocurrents of 20.478 mA/cm2,23.186 mA/cm2,21.427 mA/cm2,and 21.243 mA/cm2 are obtained for the cells using clustering conical,spherical,pyramidal,cylindrical NPs at the backside,respectively.These values are 13.987 mA/cm2,16.901 mA/cm2,16.507 mA/cm2,17.926 mA/cm2 for the cell with one conical,spherical,pyramidal,cylindrical NPs at the backside,respectively.Therefore,clustering can significantly improve the photocurrents.Finally,the distribution of the electric field and the generation rate for the proposed structures are calculated. 展开更多
关键词 clustering nanoparticles plasmonic solar cell localized surface plasmon resonance PHOTOCURRENT finite difference time domain(FDTD)method light management
On the formation of shear bands in a metallic glass under tailored complex stress fields 认领
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作者 S.H.Chen T.Li +6 位作者 W.J.Chang H.D.Yang J.C.Zhang H.H.Tang S.D.Feng F.F.Wu Y.C Wu 《材料科学技术:英文版》 SCIE EI CAS CSCD 2020年第18期112-117,共6页
The formation of shear bands in metallic glasses(MGs)was examined by tailoring localized complex stress fields(LCSFs).The findings have shown that the LCSFs in MGs can increase the localization of strained atoms and a... The formation of shear bands in metallic glasses(MGs)was examined by tailoring localized complex stress fields(LCSFs).The findings have shown that the LCSFs in MGs can increase the localization of strained atoms and accelerate the release of accumulated deformation energy for initiating a shear band in confined and thin-layered regions.The findings not only add more knowledge to the formation mechanisms of shear bands in MGs,but also provide possible rationale for the discrepancies in the mechanical properties of different-sized MGs.As compared with the bulk samples,the higher strength and larger elastic limits in nanoscaled MGs could be attributed to the elimination of stress-concentrators,which can serve as LCSFs. 展开更多
关键词 Localized complex stress field Shear band Metallic glass Molecular dynamics simulation Size effect
Localized space-tim e method of fundamental solutions for three-dimensional transient diffusion problem 认领
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作者 L.Qiu J.Lin +1 位作者 Q.-H.Qin W.Chen 《力学学报:英文版》 SCIE EI CAS CSCD 2020年第5期1051-1057,I0002,共8页
A localized space-time method of fundamental solutions(LSTMFS)is extended for solving three-dimensional transient diffusion problems in this paper.The interval segmentation in temporal direction is developed for the a... A localized space-time method of fundamental solutions(LSTMFS)is extended for solving three-dimensional transient diffusion problems in this paper.The interval segmentation in temporal direction is developed for the accurate simulation of long-time-dependent diffusion problems.In the LSTMFS,the whole space-time domain with nodes arranged i divided into a series of overlapping subdomains with a simple geometry.In each subdomain,the conventional method of fundamental solutions is utilized and the coefficients associated with the considered domain can be explicitly determined.By calculating a combined sparse matrix system,the value at any node inside the space-time domain can be obtained.Numerical experi-ments demonstrate that high accuracy and efficiency can be simultaneously achieved via the LSTMFS,even for the problems defined on a long-time and quite complex computational domain. 展开更多
关键词 Localized spacetime method of fundamental solutions Meshless method Long-time evolution Transient diffusion
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沙特阿美石油公司项目用工风险管理与研究 认领
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作者 郑朝明 赵晓慧 王进 《石油天然气学报》 CAS 2020年第3期255-260,共6页
人是生产管理中最大的难点,也是目前所有管理理论中讨论的重点。本文以沙特阿美石油公司的项目为分析案例,通过分析、应对海外项目用工风险,推行“国际化思维,属地化运营”用工模式及标准化,以及多方合作,统筹管理,在实现项目目标的同... 人是生产管理中最大的难点,也是目前所有管理理论中讨论的重点。本文以沙特阿美石油公司的项目为分析案例,通过分析、应对海外项目用工风险,推行“国际化思维,属地化运营”用工模式及标准化,以及多方合作,统筹管理,在实现项目目标的同时争取效益最大化和促进当地就业、经济发展双赢局面。特别是在今年全球新冠肺炎疫情爆发和油价暴跌的叠加影响下,如何在石油项目用工上降本增效,其管理和研究就显得尤为重要。 展开更多
关键词 沙特阿美项目 用工 属地化 标准化
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Galvanic and asymmetry effects on the local electrochemical behavior of the 2098-T351 alloy welded by friction stir welding 认领
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作者 Mariana X.Milagre Uyime Donatus +7 位作者 Naga V.Mogili Rejane Maria PSilva Barbara Victoria Gde Viveiros Victor F.Pereira Renato A.Antunes Caruline S.CMachado Joao Victor S.Araujo Isolda Costa 《材料科学技术:英文版》 SCIE EI CAS CSCD 2020年第10期162-175,共14页
Scanning electrochemical microscopy(SECM)and scanning vibrating electrode technique(SVET)were used to investigate the electrochemical behaviour of the top surface of the 2098-T351 alloy welded by friction stir welding... Scanning electrochemical microscopy(SECM)and scanning vibrating electrode technique(SVET)were used to investigate the electrochemical behaviour of the top surface of the 2098-T351 alloy welded by friction stir welding(FSW).The SVET technique was efficient in identifying the cathodic and anodic weld regions.The welding joint(WJ),which comprises the thermomechanically affected zone(TMAZ)and the stir zone(SZ),was cathodic relative to the heated affected zone(HAZ)and the base metal(BM).The reactivities of the welding joint at the advancing side(AS)and the retreating side(RS)were analyzed and compared using SECM technique in the competition mode by monitoring the dissolved oxygen as a redox mediator in 0.005 mol L^-1 NaCl solution.The RS was more electrochemically active than the AS,and these results were correlated with the microstructural features of the welded alloy. 展开更多
关键词 Aluminum alloys Friction stir welding Localized corrosion
眼前后段联合手术及空气填充治疗复杂的糖尿病性视网膜病变的效果 认领
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作者 孔晓路 田野 +1 位作者 高雪霞 王瑞峰 《中华眼外伤职业眼病杂志》 2020年第11期841-846,共6页
目的:评价晶状体超声乳化联合玻璃体切除及眼内空气填充术治疗伴有视网膜裂孔和局限性视网膜脱离的增生性糖尿病性视网膜病变的效果。方法:回顾性分析研究。收集2015年4月至2019年10月郑州市第二人民医院伴有视网膜裂孔和局限性视网膜... 目的:评价晶状体超声乳化联合玻璃体切除及眼内空气填充术治疗伴有视网膜裂孔和局限性视网膜脱离的增生性糖尿病性视网膜病变的效果。方法:回顾性分析研究。收集2015年4月至2019年10月郑州市第二人民医院伴有视网膜裂孔和局限性视网膜脱离的增生性糖尿病性视网膜病变63例(63眼)的临床资料。患者分为两组:眼前后段联合手术者定为观察组,31例(31眼);未联合白内障手术者定为对照组,32例(32眼)。术后随访6个月。结果:观察组术后1周和6个月视力(logMAR BCVA)为0.83±0.23和0.62±0.35,视力提高者28眼(90.3%),均高于对照组的1.13±0.14和0.84±0.35(t=-4.260,-3.230;P<0.05,0.003),视网膜完全复位者观察组28眼(90.3%),对照组28眼(87.5%)。两组视网膜复位率差异无统计学意义(χ^2=0.127,P=0.722)。结论:白内障手术联合玻璃体切除及空气填充术治疗伴有视网膜裂孔和局限性视网膜脱离的增生性糖尿病性视网膜病变能显著提高视力,减少手术次数。 展开更多
关键词 视网膜病变 糖尿病性 增生性 裂孔 视网膜 脱离 视网膜 局限性 玻璃体切除术 晶状体超声乳化术
手伸及性参数化及本地化校核方面的研究 认领
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作者 金贤镇 尚伟 陈鸿运 《汽车科技》 2020年第1期34-40,共7页
汽车开发设计中人机工程主要研究使用者、作业者及A/S维护人员等的"人-车-环境"关系,力求整体"人-车-环境系统"的性能达到最优状态,从而给人创建安全、健康、舒适、高效的环境。本文介绍的手伸及性是人机工程中评... 汽车开发设计中人机工程主要研究使用者、作业者及A/S维护人员等的"人-车-环境"关系,力求整体"人-车-环境系统"的性能达到最优状态,从而给人创建安全、健康、舒适、高效的环境。本文介绍的手伸及性是人机工程中评价操作性的重要指标,是整车总布置设计的重要的一部分。为提高人机工程设计的实效性,基于SAE[1]-[2]和CATIA构建参数化模型,通过更新手伸及性相关的参数,以获取新的手伸及界面,从而有效提高整车开发质量,缩短总布置设计及校核的周期;同时为确保车辆开发设计所引用手伸及界面更符合本地化需求,提出一种评价手伸及性、量化分析并构建手伸及界面的全新理论。 展开更多
关键词 总布置 人机工程 手伸及界面 参数化 本地化
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Localized Corrosion and Stress Corrosion Cracking Behavior of AA7003 in a 3.5 wt% NaCl Aqueous Solution 认领
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作者 祁星 SUN Bin +1 位作者 CHEN Xiaoming 宋仁国 《武汉理工大学学报:材料科学英文版》 SCIE EI CAS 2020年第5期986-995,共10页
The microstructure,localized corrosion (LC) and stress corrosion cracking (SCC) behavior of 7003 aluminum alloy (AA7003) under various aging treatments (peak aging (PA),double peak aging (DPA),regression and re-aging ... The microstructure,localized corrosion (LC) and stress corrosion cracking (SCC) behavior of 7003 aluminum alloy (AA7003) under various aging treatments (peak aging (PA),double peak aging (DPA),regression and re-aging (RRA)) were investigated by means of transmission electron microscope (TEM),scanning electron microscopy (SEM),electrochemical impendence spectroscopy (EIS) and slow strain rate tensile test.The results of TEM showed a discontinuous distribution of grain boundary precipitates of AA7003 under DPA and RRA treatments,which is beneficial for increasing the resistance of LC and SCC.Meanwhile,LC was found initiating firstly on intermetallics which caused the dissolution of surrounding matrix,then pitting holes were formed and developed into matrix.In addition,the SCC process of AA7003 could be divided into two stages,i e,initial pre-cracking and breeding cracking.The EIS analysis,cross-section morphologies and fracture surfaces of specimens indicated that DPA and RRA treatments significantly decreased the crack growth rate during breeding cracking stage,especially for RRA treatment. 展开更多
关键词 7003 aluminum alloy localized corrosion stress corrosion cracking
Plasmon-enhanced broad-band quantum-cutting of NaBaPO4:Eu^2+,Er^3+phosphors with silver nano-particles 认领
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作者 Jinquan Hong Lin Lin +4 位作者 Xiaoyan Li Zhuohong Feng Lili Huang Qing Qin Zhiqiang Zheng 《稀土学报:英文版》 SCIE EI CAS CSCD 2020年第11期1151-1157,I0001,共8页
NaBaPO4:Eu^2+,Er^3+phosphors and Ag nano-particles(NPs)were prepared by the solid-state reaction and chemical reduction method,respectively.The fluorescence spectra and decay curves demonstrate the effective energy tr... NaBaPO4:Eu^2+,Er^3+phosphors and Ag nano-particles(NPs)were prepared by the solid-state reaction and chemical reduction method,respectively.The fluorescence spectra and decay curves demonstrate the effective energy transfer from Eu^2+to Er^3+and the existence of three-photon quantum-cutting through two-step cross-relaxation of Er^3+.The quantum-cutting emission is peaked at 1534 nm with a broad excitation band centered at 352 nm,Plasmon-enhanced quantum-cutting of NaBaPO4:Eu^2+,Er^3+phosphors was realized by decorating Ag NPs.The largest enhancement factor is 1.395.It is hopeful to improve the photovoltaic conversion efficiency of Ge solar cells by using this phosphor. 展开更多
关键词 Luminescence Localized surface plasmon resonance Broad-band quantum-cutting Rare-earth doped phosphors
电化学定域性刻蚀多孔InP光波导 认领
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作者 尤明慧 祝煊宇 +3 位作者 李雪 董明雪 王勇 曲轶 《半导体技术》 CAS 北大核心 2020年第12期964-968,981,共6页
采用电子束光刻技术与电化学定域性刻蚀技术制备了多孔InP光波导。使用扫描电子显微镜对电化学定域性刻蚀方法制备的多孔InP进行表征和分析,研究了电流密度、掩模图形和刻蚀时间对定域性刻蚀制备的多孔InP结构的影响。电化学刻蚀过程中... 采用电子束光刻技术与电化学定域性刻蚀技术制备了多孔InP光波导。使用扫描电子显微镜对电化学定域性刻蚀方法制备的多孔InP进行表征和分析,研究了电流密度、掩模图形和刻蚀时间对定域性刻蚀制备的多孔InP结构的影响。电化学刻蚀过程中,分别利用掩模图形诱导刻蚀方向,改变电流密度调整孔隙大小和深度,改变刻蚀时间控制形成的多孔结构的深度。采用电化学定域性刻蚀与电子束光刻技术相结合,在InP衬底上制备具有光学传输特性的光波导结构。反射率测试结果表明,采用波长900 nm的入射光,多孔结构具有导波模式。使用500μm长的InP多孔结构所制备波导的损耗约为9.92 dB/cm。多孔结构InP光波导在光子集成领域具有较好的应用价值和前景。 展开更多
关键词 多孔InP 电子束光刻 电化学刻蚀 定域性 波导
Selective excitation of multipolar surface plasmon in a graphene-coated dielectric particle by Laguerre Gaussian beam 认领
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作者 杨阳 张光华 戴小玉 《中国物理B:英文版》 SCIE EI CAS CSCD 2020年第5期448-453,共6页
Localized surface plasmonic resonance has attracted extensive attention since it allows for great enhancement of local field intensity on the nanoparticle surface.In this paper,we make a systematic study on the excita... Localized surface plasmonic resonance has attracted extensive attention since it allows for great enhancement of local field intensity on the nanoparticle surface.In this paper,we make a systematic study on the excitation of localized surface plasmons of a graphene coated dielectric particle.Theoretical results show that both the intensity and frequency of the plasmonic resonant peak can be tuned effectively through modifying the graphene layer.Furthermore,high order localized surface plasmons could be excited and tuned selectively by the Laguerre Gaussian beam,which is induced by the optical angular orbital momentum transfer through the mutual interaction between the particle and the helical wavefront.Moreover,the profiles of the multipolar localized surface plasmons are illustrated in detail.The study provides rich potential applications in the plasmonic devices and the wavefront engineering nano-optics. 展开更多
关键词 localized surface plasmon Mie theory Laguerre Gaussian beam
局部可视对抗扰动生成方法 认领
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作者 周星宇 潘志松 +1 位作者 胡谷雨 段晔鑫 《模式识别与人工智能》 EI CSCD 北大核心 2020年第1期11-20,共10页
深度神经网络极易受到局部可视对抗扰动的攻击.文中以生成对抗网络为基础,提出局部可视对抗扰动生成方法.首先,指定被攻击的分类网络作为判别器,并在训练过程中固定参数不变.再构建生成器模型,通过优化欺骗损失、多样性损失和距离损失,... 深度神经网络极易受到局部可视对抗扰动的攻击.文中以生成对抗网络为基础,提出局部可视对抗扰动生成方法.首先,指定被攻击的分类网络作为判别器,并在训练过程中固定参数不变.再构建生成器模型,通过优化欺骗损失、多样性损失和距离损失,使生成器产生局部可视对抗扰动,并叠加在不同输入样本的任意位置上攻击分类网络.最后,提出类别比较法,分析局部可视对抗扰动的有效性.在公开的图像分类数据集上实验表明,文中方法攻击效果较好. 展开更多
关键词 对抗扰动 局部的 可视的 生成对抗网络(GAN)
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Synergy between thermal and nonthermal effects in plasmonic photocatalysis 认领
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作者 Xueqian Li Henry O.Everitt Jie Liu 《纳米研究:英文版》 SCIE EI CAS CSCD 2020年第5期1268-1280,共13页
Plasmonic photocatalysis represents the synergetic union of two active fields of research:plasmonic effects in illuminated metallic nanoparticles and catalytic effects in tailored metallic nanoparticles.Traditionally,... Plasmonic photocatalysis represents the synergetic union of two active fields of research:plasmonic effects in illuminated metallic nanoparticles and catalytic effects in tailored metallic nanoparticles.Traditionally,metallic nanoparticles that excel for one application are limited for the other,but recent developments have shown that desirable catalytic behaviors,such as reduced activation barriers and improved product selectivity,derive from nonthermal behaviors uniquely produced by this synergy.After examining such findings,this review will address a specific debate that has recently surfaced:what is the relative degree of contributions of thermal and nonthermal effects in plasmonic photocatalysis?We demonstrate the importance of correctly accounting for thermal effects before characterizing nonthermal contributions.We show that another synergy occurs:these desirable nonthermal behaviors have a temperature dependence,and the resulting temperature-dependent reaction rates far exceed what can be explained from purely thermal effects alone.Thus,the synergy of plasmonic photocatalysis offers an exciting new contribution to the quest for efficient,selective,sustainable methods for chemical synthesis and energy conversion. 展开更多
关键词 plasmonic catalysis hot carriers photothermal catalysis localized surface plasmon
吉西他滨化疗致双下肢硬皮病样改变 认领
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作者 钱亚芳 凌春燕 《药物不良反应杂志》 CSCD 2020年第2期105-106,共2页
1例63岁女性患者因卵巢癌术后复发接受吉西他滨(1.2 g静脉滴注,第1天)联合卡铂(500 mg静脉滴注,第2天)方案化疗。第1次化疗结束后,患者即发生双下肢轻微水肿及刺痛,脚踝至小腿中部皮肤渐变淡红色;随后刺痛感及水肿逐渐减轻,表皮逐渐增... 1例63岁女性患者因卵巢癌术后复发接受吉西他滨(1.2 g静脉滴注,第1天)联合卡铂(500 mg静脉滴注,第2天)方案化疗。第1次化疗结束后,患者即发生双下肢轻微水肿及刺痛,脚踝至小腿中部皮肤渐变淡红色;随后刺痛感及水肿逐渐减轻,表皮逐渐增厚。第2次化疗后,患者双下肢皮肤刺痛和水肿加重。化疗间歇期,刺痛症状和水肿逐渐减轻,但双下肢皮肤颜色逐渐变成深棕色,表皮增厚、变硬,呈典型硬皮病样改变。第3次化疗后,下肢刺痛及水肿再次加重,随后患者失访。因患者既往曾接受紫杉醇脂质体联合卡铂化疗6次,无皮肤损伤发生,故考虑患者的硬皮病样改变与吉西他滨有关。 展开更多
关键词 抗肿瘤药 抗代谢性 抗肿瘤药 硬皮病 局部性 吉西他滨
Near-neutral pH corrosion of mill-scaled X-65 pipeline steel with paint primer 认领
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作者 Shidong Wang Lyndon Lamborn +2 位作者 Karina Chevil Erwin Gamboa Weixing Chen 《材料科学技术:英文版》 SCIE EI CAS CSCD 2020年第14期166-178,共13页
The corrosion behaviour of mill-scaled X65 pipeline steel with and without a primer layer was studied in a simulated near-neutral pH soil solution.Results revealed a three-stage corrosion process of the mill-scaled pi... The corrosion behaviour of mill-scaled X65 pipeline steel with and without a primer layer was studied in a simulated near-neutral pH soil solution.Results revealed a three-stage corrosion process of the mill-scaled pipeline steel surface.The first stage included an initial preferential dissolution of goethite(γ-FeOOH)and lepidocrocite(?-FeOOH)in mill scale.The second stage was marked by enhanced localized corrosion and pit-formation because of either galvanic corrosion or acidic dissolution in areas enclosed by mill scale.The final stage was general corrosion after the mill scale flaked off the steel surface.When the primer layer was applied,localized corrosion was significantly enhanced on the steel surface and persisted for an extended period as compared to the mill-scaled condition.The precipitation of siderite(FeCO3)was observed at flawed locations of mill scale,although the bulk chemistry is not favorable for its formation on the steel surface free of mill scale.The local precipitation of siderite formed a capped mill scale enclosure where localized corrosion can be further enhanced. 展开更多
关键词 Pipeline steel Primer paint Mill scale Localized corrosion Siderite precipitation
Overview of juvenile localized scleroderma and its management 认领
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作者 Suzanne C.Li Rong-Jun Zheng 《世界儿科杂志:英文版》 SCIE CAS 2020年第1期5-18,共14页
Background Juvenile localized scleroderma(JLS)is a rare pediatric disease characterized by inflammation and skin thick ening.JLS is associated with deep tissue and extracutaneous involvement that often results in func... Background Juvenile localized scleroderma(JLS)is a rare pediatric disease characterized by inflammation and skin thick ening.JLS is associated with deep tissue and extracutaneous involvement that often results in functional impairment and growth disturbances.This article provides an overview of the disease with a focus on active features and treatment.Data sources We searched databases including PubMed,Elsevier and MedLine and Wanfang,reviewing publications from 2013 to 2019.Selected earlier publications were also reviewed.Results Linear scleroderma is the most common JLS subtype.Several lines of evidence suggest that JLS is an autoimmune disease.Extracutaneous involvement is common and can present before the onset of skin disease.Multiple skin features are associated with disease activity,and activity can also manifest as arthritis,myositis,uveitis,seizures,and growth impairment.Systemic immunosuppressive treatment,commonly methotrexate with or without glucocorticoids,greatly improves outcome and is recommended for treating JLS patients with active disease and moderate or higher severity.Long term monitoring is needed because of the disease's chronicity and the high frequency of relapses off of treatment.Conclusions JLS is associated with a risk for disabling and disfiguring morbidity for the growing child.Identifying active disease is important for guiding treatment,but often difficult because of the paucity of markers and lack of a universal skin activity feature.More studies of JLS pathophysiology are needed to allow the identification of biomarkers and therapeutic targets.Comparative effectiveness treatment studies are also needed to work towards optimizing care and outcome. 展开更多
关键词 Disease activity Extracutaneous involvement Juvenile localized scleroderma Morphea Pediatric scleroderma Treatment
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