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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

Dynamic Stability and Fuzzy Reliability Analysis of Toppling Perilous Rock Under Seismic Excitation

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Journal of Earth Science 2024年第1期35卷 248-262页

作者： Linfeng Wang Jixu zhang wanchun Xia Xiaoming Huang Guojin Tan Key Laboratory of Geological Hazards Mitigation for Mountainous Highway and Waterway Chongqing Jiaotong UniversityChongqing 400074China School of Transportation Southeast UniversityNanjing 211189China College of Transportation Jilin UniversityChangchun 130012China

To predict the occurrence of the collapse disaster in toppling perilous rock under the action of bidirectional earthquakes,the dynamic stability and fuzzy reliability calculation method of toppling perilous rock under the action of bidirectional earthquakes is ***,the mass viscoelasticity model is used to simulate two main control surfaces of toppling perilous rock,the seismic dynamic response model and motion equation of toppling perilous rock are established based on the D'Alembert principle,and the Newmark-β method is used to solve the dynamic motion ***,the instability event of toppling perilous rock is considered a fuzzy event,the membership function expression of the stability coefficient of toppling perilous rock is determined based on the fuzzy failure criterion,the calculation equations of the toppling perilous rock dynamic stability coefficient and fuzzy reliability are established,and the fuzzy reliability evaluation method based on the probability distribution of reliability is ***,the influence of different superposition modes of seismic excitation on the fuzzy reliability of toppling perilous rock is *** calculation results of toppling perilous rock in the engineering case show that the fuzzy reliability calculated after considering the fuzzy failure criterion is reduced by 10.73% to 25.66% compared with the classical *** the bidirectional seismic excitation,the fuzzy reliability of toppling perilous rock is reduced by 5.46% to 14.89%.Compared with using the acceleration peak time encounter mode to superpose the seismic excitation,the fuzzy reliability of toppling perilous rock is reduced by 3.4% when the maximum action effect time encounter mode is adopted.

关键词： toppling perilous rock bidirectional earthquake fuzzy failure criterion dynamic stability fuzzy reliability Newmark-βmethod probability distribution function

Evaluation of FY-3B Reprocessed OLR Data in the Asian–Australian Monsoon Region during 2011–2019:Comparison with NOAA OLR

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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

Proof of Aerobically Autoxidized Self-Charge Concept Based on Single Catechol-Enriched Carbon Cathode Material

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Nano-Micro Letters 2024年第4期16卷 1-13页

作者： Junyan Wang wanchun Guo Kesong Tian Xinta Li Xinyu Wang Panhua Li Yu zhang Bosen zhang Biao zhang Shuhu Liu Xueai Li Zhaopeng Xu Junjie Xu Haiyan Wang Yanglong Hou State Key Laboratory of Metastable Materials Science and Technology Hebei Key Laboratory of Heavy Metal Deep‑Remediation in Water and Resource ReuseSchool of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004People’s Republic of China Beijing Key Laboratory for Magnetoelectric Materials and Devices Beijing Innovation Centre for Engineering Science and Advanced TechnologySchool of Materials Science and EngineeringPeking UniversityBeijing 100871People’s Republic of China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049People’s Republic of China Xi’an Rare Metal Materials Institute Co.Ltd Xi’an 710016People’s Republic of China

The self-charging concept has drawn considerable attention due to its excellent ability to achieve environmental energy harvesting,conversion and storage without an external power ***,most self-charging designs assembled by multiple energy harvesting,conversion and storage materials increase the energy transfer loss;the environmental energy supply is generally limited by climate and meteorological conditions,hindering the potential application of these selfpowered devices to be available at all *** on aerobic autoxidation of catechol,which is similar to the electrochemical oxidation of the catechol groups on the carbon materials under an electrical charge,we proposed an air-breathing chemical self-charge concept based on the aerobic autoxidation of catechol groups on oxygen-enriched carbon materials to ortho-quinone *** harvesting,conversion and storage functions could be integrated on a single carbon material to avoid the energy transfer loss among the different ***,the assembled Cu/oxygen-enriched carbon battery confirmed the feasibility of the air-oxidation self-charging/electrical discharging mechanism for potential *** air-breathing chemical self-charge concept could facilitate the exploration of high-efficiency sustainable air self-charging devices.

关键词： Carbon material Oxygen functionality Air oxidation self-charge

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考虑航空公司偏好的协同航路分配优化方法

交通运输系统工程与信息 2024年第4期24卷 243-252页

作者：张宝成胡威刘婉纯中国民航大学空中交通管理学院天津300300 合肥新桥国际机场有限公司合肥230000

为提高协同决策中管制与航空公司之间的参与,减少航班的延误,提出多目标下的考虑航空公司偏好的航迹时隙分配模型,解决具有多个受限区的航路资源分配问题。该模型以满足容量限制、最小化航班延误及改航的相关成本为效率和公平性目标,将... 详细信息

为提高协同决策中管制与航空公司之间的参与,减少航班的延误,提出多目标下的考虑航空公司偏好的航迹时隙分配模型,解决具有多个受限区的航路资源分配问题。该模型以满足容量限制、最小化航班延误及改航的相关成本为效率和公平性目标,将该模型应用于国内某航路实例数据,运用Benders分解算法分析求解模型。结果表明,与传统的地面等待方法相比,航班总延误成本每分钟显著降低6.2%,由于改航分配导致地面延误减少,使航班总延误时间降低了29.3%,这一结果强调,增加改航(除了地面等待)以避免空域受限区的重要性。此外,该模型允许航空公司能够根据自身偏好灵活地选择原计划航线或替代航线,分析航空公司的偏好对个人和系统延误水平的影响。最后,讨论基于不同公平方案下多受限资源分配过程中效率与公平之间的权衡,提出的Min-Max方法相比现有的RBS(Ration-By-Schedule)方法能够使空域运行效率提高5.4%,航空公司公平性提高70.8%。可见,提出的多目标协同航路分配优化方法的有效性,在降低总延误成本的基础上兼顾各航空公司的公平性,是解决协同航路资源分配问题的一种有效方法。

关键词：航空运输航路资源分配优化 Benders分解算法协同航迹选择计划多目标优化

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^(18)F-DCFPyL PET/CT的不同诊断标准对前列腺癌原发病灶的诊断价值

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中华核医学与分子影像杂志 2022年第12期42卷 734-738页

作者：马乐张万春翟洛萍郝亚新山西白求恩医院(山西医学科学院同济山西医院) 山西医科大学第三医院核医学科太原030032 山西医科大学医学影像学院太原030001

目的比较不同前列腺特异膜抗原(PSMA)PET/CT诊断标准对前列腺癌(PCa)原发病灶的诊断价值。方法回顾性分析2019年5月至2021年5月在山西白求恩医院接受2-(3-(1-羧基-5-[(6-^(18)F-氟-吡啶-3-羰基)-氨基]-戊基)-脲基)戊二酸(^(18)F-DCFPyL)... 详细信息

目的比较不同前列腺特异膜抗原(PSMA)PET/CT诊断标准对前列腺癌(PCa)原发病灶的诊断价值。方法回顾性分析2019年5月至2021年5月在山西白求恩医院接受2-(3-(1-羧基-5-[(6-^(18)F-氟-吡啶-3-羰基)-氨基]-戊基)-脲基)戊二酸(^(18)F-DCFPyL)PET/CT显像的78例可疑PCa患者[年龄:(68.5±1.4)岁]影像资料,分别采用SUV_(max)、PSMA报告和数据系统(PSMA-RADS)评分、分子成像PSMA(miPSMA)评分进行盲法诊断,自身对照比较3个标准对PCa的诊断效能、与疾病危险度的相关性以及结果的一致性。采用Delong检验、Spearman秩相关分析及组内相关系数(ICC)分析数据。结果SUV_(max)、PSMA-RADS评分、miPSMA评分诊断PCa原发病灶的灵敏度均为93.75%(60/64),特异性分别为12/14、10/14、12/14;AUC分别为0.951、0.862、0.951,SUV_(max)与miPSMA评分的AUC差异无统计学意义(z=0.00,P=1.000),而PSMA-RADS评分与SUV_(max)、miPSMA评分的AUC差异有统计学意义(z值:2.71、2.93,P值:0.007、0.030)。SUV_(max)、PSMA-RADS评分、miPSMA评分诊断结果与疾病危险度呈正相关[与国际泌尿病理学会(ISUP)分级的r_(s)分别为0.66、0.62、0.63,均P<0.001;与D′Amico分组的r_(s)分别为0.67、0.64、0.67,均P<0.001]。^(18)F-DCFPyL PET/CT基于3个标准诊断PCa的结果具有高度一致性(ICC=0.941,95%CI:0.903~0.967)。结论SUV_(max)与miPSMA评分对PCa原发病灶具有更高诊断效能、更高的疾病危险度相关性,更适合临床规范化应用。

关键词：前列腺肿瘤前列腺特异膜抗原尿素正电子发射断层显像术体层摄影术,X线计算机诊断,鉴别

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

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基于分布式PMHT的多传感器多目标跟踪

系统工程与电子技术 2024年第7期46卷 2184-2190页

作者：姚思亦李万春高林张花国胡航玮电子科技大学信息与通信工程学院四川成都611731 北京机电工程研究所北京100074

在目标跟踪领域,概率多假设跟踪(probability multiple hypothesis tracking,PMHT)算法作为一种批处理算法,计算量远远小于传统的多假设跟踪算法。当前,PMHT算法的应用受限于集中式处理,本文首先在传统算法的基础上对传感器网络下的算... 详细信息

在目标跟踪领域,概率多假设跟踪(probability multiple hypothesis tracking,PMHT)算法作为一种批处理算法,计算量远远小于传统的多假设跟踪算法。当前,PMHT算法的应用受限于集中式处理,本文首先在传统算法的基础上对传感器网络下的算法似然进行了推导,得到多传感器算法下的关联后参数,接着基于共识性处理策略进行了混合共识,最后使用卡尔曼滤波完成了对目标参数的后验估计,使得PMHT算法能够被应用于不包含融合中心的全分布式传感器网络多目标跟踪。实验结果表明,在不同的杂波密度下,分布式PMHT在跟踪误差上相对于单传感器算法有着90%以上的改善效果,与集中式算法相比跟踪性能接近且运算速度更快。

关键词：多目标跟踪概率多假设跟踪一致性共识集中式状态估计分布式状态估计