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Journal of Materials Science & Technology 2022年第12期107卷 290-300页

作者： yunwei pan Anping Dong Yang Zhou Dafan Du Donghong Wang Guoliang Zhu Baode Sun Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Lab of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240China

Ni Co Cr-based multi-component alloys have drawn much attention due to their exceptional ductility and strain hardening ***,insufficient strength-ductility synergy of NiCoCr alloy has always been an issue that prevents it from extensive *** to our previous research,the precipitation ofγ”phase can significantly improve the strength-ductility synergy of this alloy system at room *** this study,the effects of V addition onγ”phase stability and high-temperature mechanical properties have been explicitly *** results indicate that V addition can stabilize the metastableγ”phase in this alloy system and prevent it from transforming into a stableδphase at grain boundaries upon 650℃aging,resulting in improved mechanical properties at elevated *** specific strength ofγ”-strengthened multi-component NiCoCr-based alloy can reach up to 86.2 MPa gcmat 650℃,which is higher than those of Ni-based superalloys,IN 939 and *** work provides theoretical guidance for the novel design of γ”-strengthened alloy for high-temperature applications.

关键词： Multi-component alloys CALPHAD γ”phase Microstructural evolution High-temperature mechanical properties

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基于遗传算法的悬架系统的优化和仿真

重庆交通大学学报（自然科学版） 2013年第5期32卷 1068-1070,1100页

作者：潘云伟胡启国罗天洪梁伟张娇重庆交通大学机电与汽车工程学院重庆400074

通过建立1/4汽车两自由度模型,建立了汽车行驶平顺性优化仿真数学模型,根据对车辆行驶平顺性、乘坐舒适性和操作稳定性的要求,提出了优化的目标函数。在MATLAB中建立遗传算法的程序模型,应用遗传算法对该模型进行求解。通过仿真,对优化... 详细信息

通过建立1/4汽车两自由度模型,建立了汽车行驶平顺性优化仿真数学模型,根据对车辆行驶平顺性、乘坐舒适性和操作稳定性的要求,提出了优化的目标函数。在MATLAB中建立遗传算法的程序模型,应用遗传算法对该模型进行求解。通过仿真,对优化前后汽车行驶平顺性的3项指标进行对比分析。仿真结果表明:遗传算法用于汽车行驶平顺性的优化取得了良好的效果。

关键词：汽车行驶平顺性遗传算法优化仿真

SLM参数对GH3536高温合金显微缺陷和表面质量的影响

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航空材料学报 2022年第5期42卷 71-80页

作者：张璇董安平杜大帆潘云炜熊良华孔源孙宝德上海交通大学材料科学与工程学院上海市先进高温材料及其精密成型重点实验室上海200240 上海交通大学金属基复合材料国家重点实验室上海200240

采用选区激光熔化技术(SLM)制备GH3536高温合金试样,通过改变激光功率和扫描速度研究工艺参数对成形试样密度、显微缺陷和表面质量的影响。结果表明:当激光能量密度从46.3 J/mm3增加到243.1 J/mm3时,成形试样密度得到显著提高并在8.30~8... 详细信息

采用选区激光熔化技术(SLM)制备GH3536高温合金试样,通过改变激光功率和扫描速度研究工艺参数对成形试样密度、显微缺陷和表面质量的影响。结果表明:当激光能量密度从46.3 J/mm3增加到243.1 J/mm3时,成形试样密度得到显著提高并在8.30~8.35 g/cm3范围内波动,随着输入的激光能量进一步增加试样密度又略微下降。通过金相观察发现当输入激光能量不足时,试样内部存在大量不规则孔洞缺陷,然而当输入激光能量过高时,试样内部出现了许多分布均匀的微裂纹和气孔,说明激光能量过高或过低都会降低成形试样的致密度。进一步对成形试样表面黏附的飞溅颗粒统计分析后,确定了SLM成形GH3536合金的最佳工艺参数,对该参数下成形的试样进行室温拉伸性能测试,得到了具有良好室温拉伸力学性能的GH3536高温合金材料。

关键词：选区激光熔化 GH3536 工艺参数显微缺陷表面质量

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Co-Ni-W三元系相图的实验测定与热力学计算

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材料导报 2019年第20期33卷 3460-3466页

作者：王翠萍牛泽明潘云炜陈悦超杨双郭毅慧卢勇韩佳甲刘兴军厦门大学材料学院福建省材料基因工程重点实验室厦门361005 哈尔滨工业大学(深圳)材料科学与工程学院先进焊接与连接国家重点实验室深圳518005

本研究采用合金法、电子探针显微分析仪(EPMA)和X射线衍射(XRD)技术,对Co-Ni-W三元系在1 000℃和1 200℃下的等温截面相图进行了实验测定。结合本研究和已报道的相平衡实验信息,基于CALPHAD(Calculation of phase diagrams)方法,对Co-N... 详细信息

本研究采用合金法、电子探针显微分析仪(EPMA)和X射线衍射(XRD)技术,对Co-Ni-W三元系在1 000℃和1 200℃下的等温截面相图进行了实验测定。结合本研究和已报道的相平衡实验信息,基于CALPHAD(Calculation of phase diagrams)方法,对Co-Ni-W三元系相图进行了热力学优化与计算,获得了自洽性良好的热力学参数,计算结果与实验数据取得了良好的一致性。

关键词： Co-Ni-W三元系相图 CALPHAD方法热力学计算

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混动汽车启动抖动问题分析及优化

重庆理工大学学报（自然科学） 2020年第2期34卷 64-68页

作者：潘云伟颜伏伍刘宗成唐世坤李进李玲东风小康汽车有限公司

针对启动抖动会严重影响整车NVH性能的问题,研究了某SUV混动车型启动工况下的整车抖动问题,确定了启动抖动产生的根本原因。通过制定一系列的试验方案进行对比分析,并结合LMS测试数据进行时域分析,明确导致整车启动抖动的根本原因是启... 详细信息

针对启动抖动会严重影响整车NVH性能的问题,研究了某SUV混动车型启动工况下的整车抖动问题,确定了启动抖动产生的根本原因。通过制定一系列的试验方案进行对比分析,并结合LMS测试数据进行时域分析,明确导致整车启动抖动的根本原因是启动电机拖动发动机过程中扭矩波动导致。根据"源-路径-响应"思路制定优化方案,对悬置与电机进行优化。实车测试表明:优化后整车抖动量级明显减小,满足开发目标要求,证实了该优化方案可以有效解决启动抖动问题。

关键词：混动汽车启动抖动扭矩波动时域分析

新型重组高效复合干扰素对宫颈癌细胞的生长抑制及促凋亡作用

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实用妇产科杂志 2009年第4期25卷 216-219,I0001页

作者：陈妍欧阳运薇潘小玲刘霞赖曾珍四川大学华西第二医院四川成都610041

目的:探讨新型重组高效复合干扰素对宫颈癌Caski细胞的作用,并与同类型复合干扰素、普通重组Ⅰ型干扰素、化疗药物对比。方法:应用新型重组高效复合干扰素、复合α干扰素、干扰素α-2b和顺铂以0.156μg/ml、0.625μg/ml、2.5μg/ml及10... 详细信息

目的:探讨新型重组高效复合干扰素对宫颈癌Caski细胞的作用,并与同类型复合干扰素、普通重组Ⅰ型干扰素、化疗药物对比。方法:应用新型重组高效复合干扰素、复合α干扰素、干扰素α-2b和顺铂以0.156μg/ml、0.625μg/ml、2.5μg/ml及10μg/ml浓度作用于体外培养的Caski细胞72小时后,MTT法检测并计算细胞抑制率并比较。应用新型重组高效复合干扰素、复合α干扰素、干扰素α-2b和顺铂以0.156μg/ml、0.625μg/ml、2.5μg/ml浓度作用于体外培养的Caski细胞72小时后,以流式细胞仪检测Caski细胞的凋亡率并进行比较。结果:几种干扰素及顺铂均能导致Caski细胞生长抑制及促进细胞凋亡,相同浓度条件下,新型重组高效复合干扰素和顺铂对Caski细胞的抑制及凋亡作用强于复合α干扰素和干扰素α-2b的作用,尤以顺铂的作用最强。结论:重组高效复合干扰素对体外培养的宫颈癌Caski细胞的生长有抑制作用,并能促进Caski细胞凋亡;作用虽然不及化疗药物顺铂,但较同类型干扰素、普通重组Ⅰ型干扰素的作用强。

关键词：干扰素宫颈癌基因重组

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CrCoNi基多主元合金研究进展

中国材料进展 2021年第4期40卷 241-250页

作者：潘云炜董安平杜大帆周阳何林李仲杰汪东红疏达祝国梁孙宝德上海交通大学材料科学与工程学院上海200240

总结了近期引起国内外众多学者关注的CrCoNi基多主元合金的研究现状。首先简要地介绍了CrCoNi基合金的发展历史,详细分析了该合金的变形机理,其中包括变形孪晶的形成原因及其对合金性能产生的影响。其次介绍了包括冷轧、热轧和增材制造... 详细信息

总结了近期引起国内外众多学者关注的CrCoNi基多主元合金的研究现状。首先简要地介绍了CrCoNi基合金的发展历史,详细分析了该合金的变形机理,其中包括变形孪晶的形成原因及其对合金性能产生的影响。其次介绍了包括冷轧、热轧和增材制造在内的多种加工工艺对该合金显微组织及力学性能的影响。目前制备CrCoNi合金应用最广泛的方法是“铸造-冷轧-热处理”。但是有学者研究发现,通过增材制造制备的CrCoNi合金,其强度在不经过任何打印后热处理就与传统冷轧+热处理方式制备的合金相当,说明CrCoNi合金是一种非常适合于增材制造加工的合金。随后,分类讨论了多种合金元素对CrCoNi基多主元合金显微组织、相稳定性和力学性能的影响。其中Al和Ti的复合添加使面心立方(FCC)基体上析出了γ′相,对CrCoNi合金的强化效果最为显著,明显改善了合金的力学性能。最后,提出了CrCoNi基多主元合金的后续研究方向及其潜在应用背景。

关键词：多主元合金 CrCoNi 合金元素增材制造力学性能变形孪晶

SST diurnal warming in the China seas and northwestern Pacific Ocean using MTSAT satellite observations

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Acta Oceanologica Sinica 2016年第12期35卷 12-18页

作者： TU Qianguang pan Delu HAO Zengzhou YAN yunwei State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyState Oceanic Administration Department of Earth Science Zhejiang University College of Geomatics and Municipal Engineering Zhejiang University of Water Resources and Electric Power

Hourly sea surface temperature(SST) observations from the geostationary satellite are increasingly used in studies of the diurnal warming of the surface oceans. The aim of this study is to derive the spatial and temporal distribution of diurnal warming in the China seas and northwestern Pacific Ocean from Multi-functional Transport Satellite(MTSAT) SST. The MTSAT SST is validated against drifting buoy measurements firstly. It shows mean biases is about –0.2°C and standard deviation is about 0.6°C comparable to other satellite SST accuracy. The results show that the tropics, mid-latitudes controlled by subtropical high and marginal seas are frequently affected by large diurnal warming. The Kuroshio and its extension regions are smaller compared with the surrounding regions. A clear seasonal signal, peaking at spring and summer can be seen from the long time series of diurnal warming in the domain in average. It may due to large insolation and low wind speed in spring and summer, while the winter being the opposite. Surface wind speed modulates the amplitude of the diurnal cycle by influencing the surface heat flux and by determining the momentum flux. For the shallow marginal seas, such as the East China Sea, turbidity would be another important factor promoting diurnal warming. It suggests the need for the diurnal variation to be considered in SST measurement, air-sea flux estimation and multiple sensors SST blending.

关键词： diurnal warming sea surface temperature remote sensing MTSAT

Early Monitoring of Pine Wilt Disease in Pinus massioniana based on Hyperspectral Data

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Plant Diseases and Pests 2015年第4期6卷 1-5页

作者： pan Jie Zhang Heng Ju yunwei Liao Zhenfeng Nanjing Forestry University

We selected healthy Pinus massioniana for pine wood nematode inoculation experiments to get the spectral reflectance of healthy and infected Pinus mas- sioniana in different infection stages via a ground spectrometer （ wavelength in 350 - 2 500 nm）, and analyzed the changes in chlorophyll content at various periods. The original spectral reflectance of healthy and infected P. massoniana was significantly different in the middle and late infection stages, and the reflection peak and absorption valley in visible light region and near infrared region gradually weakened and even disappeared to a straight line. There was significant correlation rela- tionship between chlorophyll content of infected plants and spectral reflectance at the wavelength of 1 405 nm, and the quantitative inversion model of chlorophyll content was correspondingly established as follows： Car = - 1.74（X1~ ）2 ＋ 4. 72X1,~ - 0. 76. Through first-order derivative spectra at the wavelength of 593 nm, combined with quantitative inversion of the corresponding chlorophyll content, we can discriminate whether P. massoniana is infected by pine lt disease or not, especially in the early stages before disease features are visible to the naked eyes it has a good quantitative monitoring effect.

关键词： Pinto masson/ana Pine wilt disease Hyperspeetral data Chlorophyll Early monitoring

A novel image-fusion method based on the un-mixing of mixed MS sub-pixels regarding high-resolution DSM

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International Journal of Digital Earth 2016年第6期9卷 606-628页

作者： Hui Li Linhai Jing Zhongchang Sun Junjie Li RuXu yunwei Tang Fulong Chen Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijingPeoples’s Republic of China China Academy of Surveying and Mapping BeijingPeoples’s Republic of China Henan Urban Construction Institute HenanPeoples’s Republic of China Institute of Space and Earth Information Science Chinese University of Hong KongHong KongPeoples’s Republic of China

A major reason for the spectral distortions of fused images generated by current image-fusion methods is that the fused versions of mixed multispectral(MS)sub-pixels(MSPs)corresponding to panchromatic(pan)pure pixels remain *** MSPs can be un-mixed spectrally to pure pixels having the same land cover classes in a fine classification map during the fusion *** it is difficult to produce such a land cover classification map using only MS and pan images,a Digital Surface Model(DSM)derived from airborne Light Detection And Ranging data were employed in this study to facilitate the *** a novel fusion method proposed in this paper,MSPs near and across boundaries between vegetation and non-vegetation are identified using MS,pan,and normalized Digital Surface Model(nDSM).The identified MSPs then are fused to pure pixels with respect to the corresponding land cover class in the classification *** a test on WorldView-2 images over an urban area and the corresponding nDSM,the fused image generated by the proposed method was visually and quantitatively compared with fused images obtained using common image-fusion *** fused images generated by the proposed method yielded minimal spectral distortions and sharpened boundaries between vegetation and non-vegetation.

关键词： Image fusion un-mixing mixed sub-pixel DSM LiDAR WorldView-2