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Journal of Meteorological Research 2021年第6期35卷 964-974页

作者： Lin LIU wanchun zhang Wen CHEN Renguang WU Lin WANG State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081 National Satellite Meteorological Center China Meteorological AdministrationBeijing 100081 Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100190 School of Earth Sciences Zhejiang UniversityHangzhou 310027

The present study evaluates spatial and temporal characteristics of the Fengyun-3 B(FY-3 B)’s outgoing longwave radiation(OLR)data based on NOAA OLR data and the GPCP(Global Precipitation Climatology Project)precipitation data over the Asian-Australian region during *** terms of climatological distribution patterns and interannual standard deviation,FY-3 BOLR are quite consistent with NOAA OLR,with annual and seasonal pattern correlation coefficients all exceeding *** are some discrepancies in the OLR magnitude between FY-3 B and NOAA,especially for the OLR climatology;the climatological OLR from FY-3 B are systematically larger than those from NOAA over the whole study *** addition,examination of the temporal correlation coefficients between OLR and precipitation over the Asian-Australian monsoon(AAM)region reveals that both of the OLR datasets have captured the widespread negative correlation with precipitation,and FY-3 BOLR exhibits a stronger relationship to precipitation over ***,FY-3 BOLR exhibits better responses to the precipitation anomalies over India during the extreme El Nino and La Nina *** results suggest that the FY-3 B OLR dataset is of high quality and worthy of further global application.

关键词： Fengyun-3B outgoing longwave radiation precipitation Asian–Australian monsoon data evaluation

Evaluation of Reprocessed Fengyun-3B Global Outgoing Longwave Radiation Data:Comparison with CERES OLR

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Journal of Meteorological Research 2022年第3期36卷 417-428页

作者： wanchun zhang Jian LIU Peng zhang Ling SUN Hanlie XU Yanjiao WANG Lin CHEN Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites National Satellite Meteorological CenterChina Meteorological AdministrationBeijing 100081 Fengyun Meteorological Satellite Innovation Center China Meteorological AdministrationBeijing 100081 National Climate Center China Meteorological AdministrationBeijing 100081

Outgoing longwave radiation(OLR)at the top of the atmosphere(TOA)is a key parameter for understanding and interpreting the relationship between clouds,radiation,and climate *** has been one of the operational products of the Fengyun(FY)meteorological *** accuracy has gradually improved with advancements in satellite payload performance and the OLR retrieval *** by the National Key R&D Program Retrospective Calibration of Historical Chinese Earth Observation Satellite data(Richceos)project,a long-term OLR climate data record(CDR)was reprocessed based on the recalibrated Level 1 data of FY series satellites using the latest OLR retrieval *** this study,Fengyun-3B(FY-3B)’s reprocessed global OLR data from 2010 to 2018 were evaluated by using the Clouds and the Earth’s Radiant Energy System(CERES)global daily OLR *** results showed that there was a high consistency between the FY-3B instantaneous OLR and CERES Single Scanner Footprint(SSF)***,between the two CDR datasets,the correlation coefficient reached 0.98,and the rootmean-square error(RMSE)was approximately 8-9 W m^(−2).The bias mainly came from the edge regions of the satellite orbit,which may be related to the satellite zenith angle and cloud cover *** was shown that the longterm FY-3B OLR had temporal stability compared to CERES OLR long-term *** terms of spatial distribution,the mean deviations showed zonal and seasonal characteristics,although seasonal fluctuations were observed in the differences between the two *** of FY-3B OLR application to the South China Sea monsoon region and ENSO were demonstrated and analyzed,and the results showed that the seasonal deviation of FY-3B’s OLR comes mainly from the retrieval ***,it has little effect on the analysis of climate events.

关键词： Fengyun-3B(FY-3B) Clouds and the Earth’s Radiant Energy System(CERES) outgoing longwave radiation(OLR) South China Sea monsoon El Niño-Southern Oscillation(ENSO)

Evaluation of the Madden–Julian Oscillation in Fengyun-3B Polar-Orbiting Satellite Reprocessed OLR Data

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Journal of Meteorological Research 2022年第6期36卷 931-946页

作者： Hainan GONG wanchun zhang Ling SUN Zizhen DONG Peng zhang Lin WANG Wen CHEN Renguang WU Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100190 National Satellite Meteorological Centre China Meteorological AdministrationBeijing 100081 School of Earth Sciences Yunnan UniversityKunming 650500 School of Earth Sciences Zhejiang UniversityHangzhou 310058

The present study compares the spatial and temporal characteristics of the Madden-Julian Oscillation(MJO)in Fengyun-3B(FY-3B)polar-orbiting satellite reprocessed outgoing longwave radiation(OLR)data and NOAA OLR data during *** spatial distributions of climatological mean and intraseasonal standard deviation of FY-3B OLR during boreal winter(November-April)and boreal summer(May-October)are highly consistent with those of NOAA *** FY-3B and NOAA OLRs display highly consistent features in the wavenumber-frequency spectra,the occurrence frequency of MJO active days,the eastward propagation of MJO along the equator,and the interannual variability of MJO according to diagnoses using the all-season multivariate EOF *** results indicate that the FY-3B OLR produced by the polar-orbiting satellites is of high quality and worthy of global application.

关键词： Fengyun-3B outgoing longwave radiation Madden–Julian Oscillation multivariate empirical orthogonal function data evaluation

Study of characteristics of ultrasound pulse generated by a laser pulse

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Chinese Journal of Acoustics 1994年第3期13卷 202-212页

作者： QIAN Menglu zhang wanchun and WU Tiancheng (Institute of Acoustics. Tongji Uaiversity. Shanghai 200092)

The one-dimension thermal conduction equation and Navier-Stokes equa tion are used to get a pulse stress wave in a scmi-infinitc medium when a rectangular pulse laser of duration t_0 is incident on its surface. For both tfansparent and opaque samples the ultrasonic stress waveforms arc discussed when the sample surface is con strained or free. The experimental results in these two different boundary conditions of an opaque sample are presented. It is shown, theoretically and experimentally,that the ultrasound pulse thermoelastically generated by a pulse laser is monopolar when the sample surface is constrained and it is bipolar when its surface is free.

关键词： Ultrasound pulse Laser pulse

SEQUENCE　STRATIGRAPHIC　MODELS　FOR　A　RIFT　LACUSTRINE　BASIN－AN　EXAMPLE　FROM　THE　JIYANG　DEPRESSION　IN　THE　BOHAI　BAY　BASIN

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Scientia Geologica Sinica 1995年第4期 467-474页

作者： Cao Yingchang Jiang Zaixing Wang Liuqi Qian Zheng zhang wanchun and Ma Yuxin (University of Petroleum, Dongying, Shandong 257062)

ＳＥＱＵＥＮＣＥＳＴＲＡＴＩＧＲＡＰＨＩＣＭＯＤＥＬＳＦＯＲＡＲＩＦＴＬＡＣＵＳＴＲＩＮＥＢＡＳＩＮ－ＡＮＥＸＡＭＰＬＥＦＲＯＭＴＨＥＪＩＹＡＮＧＤＥＰＲＥＳＳＩＯＮＩＮＴＨＥＢＯＨＡＩＢＡＹＢＡＳＩＮ￥ＣａｏＹｉｎ...

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无机水合盐相变材料过冷度抑制方法的研究进展

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过程工程学报 2020年第6期20卷 619-627页

作者：陶文张毅孔祥法张晚春樊传刚安徽工业大学材料科学与工程学院安徽马鞍山243002

无机水合盐相变材料具有较高的相变潜热、原料易得、安全性高等优点,在未来中低温储能领域有巨大的应用潜力,但其在相变过程中易出现“过冷”与“相分离”等现象,严重影响了其热稳定性能,相关问题可通过添加成核剂、增稠剂进行解决。但... 详细信息

无机水合盐相变材料具有较高的相变潜热、原料易得、安全性高等优点,在未来中低温储能领域有巨大的应用潜力,但其在相变过程中易出现“过冷”与“相分离”等现象,严重影响了其热稳定性能,相关问题可通过添加成核剂、增稠剂进行解决。但无机水合盐在液态下会发生泄漏,需要将其限制在一定区域内。通过多孔材料吸附、微胶囊化等方法可以对无机水合盐相变材料进行封装,多孔材料如膨胀石墨、膨润土、泡沫金属等可以吸附无机水合盐,防止其相变过程发生泄漏。微胶囊包覆则是通过将相变材料微胶囊化封装在壳材内,常用壳材包括聚甲基丙烯酸甲酯、三聚氰胺-甲醛树脂或聚脲树脂等,此外,无机SiO2壁材也是常用的材料。通过吸附封装或者微胶囊化,可以将无机水合盐相变材料限制在一定区域内,提高无机水合盐相变材料的分散性能,降低其过冷度、改善相分离现象,进一步提高无机水合盐相变循环的热稳定性,是解决无机水合盐相变材料在相变过程中渗漏问题的有效方法。本工作综述了无机水合盐相变材料过冷、相分离问题的研究现状,总结了采用多孔材料吸附和微胶囊化抑制或解决无机水合盐过冷度的研究进展,并对今后无机水合盐储能应用研究提出了建议与展望。

关键词：无机水合盐相变材料成核剂多孔材料微胶囊过冷

PSMA PET在分化型甲状腺癌中的临床应用进展

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中华核医学与分子影像杂志 2024年第5期44卷 313-316页

作者：张恩碧张万春山西医科大学医学影像学院太原030001 山西白求恩医院核医学科太原030032

分化型甲状腺癌(DTC)是常见的内分泌肿瘤之一。绝大多数的DTC预后较好,部分中高危DTC患者可能在自然病程或治疗过程中出现摄碘能力下降,或虽然保持摄碘能力但仍出现病情进展。18F-FDG PET/CT对探测此类患者的复发或转移病灶有较高的提... 详细信息

分化型甲状腺癌(DTC)是常见的内分泌肿瘤之一。绝大多数的DTC预后较好,部分中高危DTC患者可能在自然病程或治疗过程中出现摄碘能力下降,或虽然保持摄碘能力但仍出现病情进展。18F-FDG PET/CT对探测此类患者的复发或转移病灶有较高的提示意义,但也会有假阴性的可能。肿瘤新生血管在肿瘤转移、侵袭的过程中发挥重要作用。前列腺特异膜抗原(PSMA)在DTC新生血管中也有表达,提示PSMA PET在甲状腺癌中具有潜在价值。该文对PSMA PET在DTC中的临床应用进展进行综述。

关键词：甲状腺肿瘤前列腺特异膜抗原正电子发射断层显像术发展趋势

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风云三号双星联合反演日平均OLR能力评估

遥感学报 2024年第10期28卷 2600-2610页

作者：张婉春刘健徐娜陈林徐寒列中国气象局中国遥感卫星辐射测量和定标重点开放实验室北京100081 许健民气象卫星创新中心北京100081 国家卫星气象中心北京100081

大气顶射出长波辐射(OLR)是大气顶辐射能量平衡的重要分量。风云三号D星和E星(FY-3D和FY-3E)上搭载的中分辨率成像光谱仪(MERSI)均可用于OLR反演。为研究日变化特征对OLR日平均精度的影响,基于美国Aqua CERES OLR瞬时观测数据,采用等经... 详细信息

大气顶射出长波辐射(OLR)是大气顶辐射能量平衡的重要分量。风云三号D星和E星(FY-3D和FY-3E)上搭载的中分辨率成像光谱仪(MERSI)均可用于OLR反演。为研究日变化特征对OLR日平均精度的影响,基于美国Aqua CERES OLR瞬时观测数据,采用等经纬度投影匹配统计方法,分别对FY-3D和FY-3E MERSI瞬时OLR反演精度进行一致性比对。结果表明:两颗星OLR反演精度基本一致,FY-3D和FY-3E MERSI OLR与Aqua CERES OLR相比,RMSE均在6—7 W/m^(2);相比于单颗星每日两次计算的日平均OLR,基于两颗卫星每日四次观测计算的日平均OLR的精度提高3—4 W/m^(2)。因此,利用两颗极轨气象卫星观测数据,可更精确地反映OLR日变化特征。

关键词：风云三号多星联合大气顶射出长波辐射日变化中分辨率成像光谱仪云和地球辐射能量系统

VPTIG焊接机器人在铝合金贮箱箱底生产中的应用

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宇航材料工艺 2014年第A1期44卷 58-61页

作者：张万春苏江中国航天科技集团公司长征机械厂成都610100

简要介绍了焊接机器人系统结构特征，采用VPTIG单面焊双面成型技术进行2A14铝合金焊接试验，获得良好的焊接接头性能，总结出可靠的工艺控制方法。并应用于铝合金贮箱箱底的生产中，产品焊缝经过RT探伤、液压气密试验、氦质谱检漏等检... 详细信息

简要介绍了焊接机器人系统结构特征，采用VPTIG单面焊双面成型技术进行2A14铝合金焊接试验，获得良好的焊接接头性能，总结出可靠的工艺控制方法。并应用于铝合金贮箱箱底的生产中，产品焊缝经过RT探伤、液压气密试验、氦质谱检漏等检测方法，各项技术指标满足设计要求。

关键词：焊接机器人 VPTIG 单面焊双面成型

改进的FY-3B/VIRR OLR反演模式及其应用效果

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气象 2018年第6期44卷 844-849页

作者：吴晓白文广张婉春中国气象局中国遥感卫星辐射测量和定标重点开放实验室北京100081 国家卫星气象中心北京100081

FY-3B卫星VIRR仪器的向外长波辐射(outgoing long-wave radiation,OLR)产品处理采用与NOAA/AVHRR相同的算法模型,即用窗区通道亮温-通量等效亮度温度的回归关系式计算OLR,但两星的OLR业务产品与目前国际质量最好的云和地球辐射能量系统(... 详细信息

FY-3B卫星VIRR仪器的向外长波辐射(outgoing long-wave radiation,OLR)产品处理采用与NOAA/AVHRR相同的算法模型,即用窗区通道亮温-通量等效亮度温度的回归关系式计算OLR,但两星的OLR业务产品与目前国际质量最好的云和地球辐射能量系统(cloud and earth’s radiant energy system,CERES)仪器观测OLR产品相比,存在约10 W·m^(-2)的系统负偏差。FY-3B的原因在于OLR反演模式建立过程中红外辐射传输计算软件的精度不够。鉴于此,本文采用美国21世纪开发的逐线辐射传输模型计算软件(LBLRTM),模拟计算了全球2521条大气廓线的大气顶辐射率光谱,在此基础上计算了每条廓线的OLR和FY-3B/VIRR窗区通道亮温,应用最小二乘法统计回归模拟数据,重新建立了由FY-3B/VIRR窗区通道亮温计算OLR的回归关系式及系数。模式应用于FY-3BL1级数据,处理2016年1,3,7和10月的FY-3B逐日全球OLR资料,该资料与AQUA-TERRA卫星的CERES仪器OLR观测产品相比,得到日平均OLR:RMSE=9~15 W·m^(-2),R=0.9834,Bias=-0.3W·m^(-2);月平均OLR:RMSE=4~7W·m^(-2),R=0.9915,Bias=-0.3W·m^(-2),表明改进的模式能处理出无系统偏差的、精度基本与CERES观测相当的OLR产品,尽管单通道反演算法有着固有的模式回归误差。

关键词： FY-3B 射出长波辐射反演模式