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Effects of diurnal adjustment on biases and trends derived from inter-sensor calibrated AMSU-A data

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Frontiers of Earth Science 2018年第1期12卷 1-16页

作者： H. CHEN X. zou Z. QIN Department of Atmospheric and Oceanic Sciences University of Colorado Boulder Colorado CO 80309 USA Earth System Science Interdisciplinary Center (ESSIC) University of Maryland College Park Maryland MD 20742 USA Joint Center for Data Assimilation Research and Applications Nanjing University of Information Science and Technology Nanjing 210044 China

Measurements of brightness temperatures from Advanced Microwave Sounding Unit-A （AMSU-A） temperature sounding instruments onboard NOAA Polar- orbiting Operational Environmental Satellites （POES） have been extensively used for studying atmospheric temperature trends over the past several decades. Inter- sensor biases, orbital drifts and diurnal variations of atmospheric and surface temperatures must be considered before using a merged long-term time series of AMSU-A measurements from NOAA- 15, - 18, - 19 and MetOp-A. We study the impacts of the orbital drift and orbital differences of local equator crossing times （LECTs） on temperature trends derivable from AMSU-A using near-nadir observa- tions from NOAA-15, NOAA-18, NOAA-19, and MetOp-A during 1998 - 2014 over the Amazon rainforest. The double difference method is firstly applied to estimation of inter-sensor biases between any two satellites during their overlapping time period. The inter-calibrated observations are then used to generate a monthly mean diurnal cycle of brightness temperature for each AMSU-A channel. A diurnal correction is finally applied each channel to obtain AMSU-A data valid at the same local time. Impacts of the inter-sensor bias correction and diurnal correction on the AMSU-A derived long-term atmospheric temperature trends are separately quantified and compared with those derived from original data. It is shown that the orbital drift and differences of LECT among different POESs induce a large uncertainty in AMSU-A derived long-term warming/cooling trends. After applying an inter-sensor bias correction and a diurnal correction, the warming trends at different local times, which are approximately the same, are smaller by half than the trends derived without applying these corrections.

关键词： AMSU-A diurnal adjustment decadal tem-perature trend

The outpost against cancer:universal cancer only markers

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Cancer Biology & Medicine 2023年第11期20卷 806-815页

作者： Chengchen Qian Xiaolong zou Wei Li Yinshan Li Wenqiang Yu Shanghai Epiprobe Biotechnology Co. LtdShanghai 200233China Department of General Surgery the First Affiliated Hospital of Harbin Medical UniversityHarbin 150001China Shandong Epiprobe Medical Laboratory Co. LtdHeze 274108China People's Hospital of Ningxia Hui Autonomous Region Ningxia Medical UniversityYinchuan 750002China Shanghai Public Health Clinical Center&Department of General Surgery Huashan Hospital&Cancer Metastasis Institute&Laboratory of RNA EpigeneticsInstitutes of Biomedical SciencesShanghai Medical CollegeFudan UniversityShanghai 200032China

Cancer is the leading cause of death *** detection of cancer can lower the mortality of all types of cancer;however,effective early-detection biomarkers are lacking for most types of *** methylation has always been a major target of interest because DNA methylation usually occurs before other detectable genetic *** investigating the common features of cancer using a novel guide positioning sequencing for DNA methylation,a series of universal cancer only markers(UCOMs)have emerged as strong candidates for effective and accurate early detection of *** the clinical value of current cancer biomarkers is diminished by low sensitivity and/or low specificity,the unique characteristics of UCOMs ensure clinically meaningful *** of the clinical potential of UCOMs in lung,cervical,endometrial,and urothelial cancers further supports the application of UCOMs in multiple cancer types and various clinical *** fact,the applications of UCOMs are currently under active investigation with further evaluation in the early detection of cancer,auxiliary diagnosis,treatment efficacy,and recurrence *** molecular mechanisms by which UCOMs detect cancers are the next important topics to be *** application of UCOMs in real-world scenarios also requires implementation and refinement.

关键词： Cancer detection cancer screening DNA methylation cancer epigenetics cancer biomarkers

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浅隧道双线环固定重建内侧髌股韧带

中国矫形外科杂志 2024年第12期32卷 1137-1141页

作者：周明龚礼侯慧铭邹文范少勇胡梁深南昌市洪都中医院江西南昌330008

[目的]介绍浅隧道双线环固定术重建内侧髌股韧带(medial patellofemoral ligament,MPFL)的手术技术和初步临床结果。[方法]2021年1月—2022年1月,对30例髌骨脱位患者采用浅隧道双线环固定MPFL重建。首先于髌骨内侧上和体部定位,钻入2枚... 详细信息

[目的]介绍浅隧道双线环固定术重建内侧髌股韧带(medial patellofemoral ligament,MPFL)的手术技术和初步临床结果。[方法]2021年1月—2022年1月,对30例髌骨脱位患者采用浅隧道双线环固定MPFL重建。首先于髌骨内侧上和体部定位,钻入2枚带尾孔导针至对侧,使用4.5 mm空心钻沿带尾孔导针制作两个深约5 mm的浅隧道。利用带尾孔导针两骨道各引入1根引线。再用引线将对折的2根线环反向引入双隧道。将肌腱移植物置于2个线环中,分别收紧线环,将肌腱移植物引入浅隧道,紧密贴合后,打结固定。将肌腱移植物经深筋膜下引至股侧切口,制作股骨隧道,将移植物引入,适当张力下,挤压螺钉固定。[结果]所有患者均顺利完成手术,无严重并发症,随访12~24个月。与术前相比,末次随访时膝关节活动度[(63.3±18.2)°,(121.4±4.7)°,P<0.001]、VAS评分[(6.4±0.9),(1.9±0.5),P<0.001]、IKDC评分[(38.2±6.5),(79.9±5.3),P<0.001]、髌骨倾斜角[(23.7±4.2)°,(12.1±3.2)°,P<0.001]及髌骨适合角[(18.9±3.1)°,(-5.5±1.3)°,P<0.001]均显著改善。[结论]浅隧道双线环固定术重建内侧髌股韧带治疗髌骨脱位或半脱位可减少医源性损伤,取得良好临床疗效。

关键词：髌骨脱位或半脱位内侧髌股韧带重建浅隧道双线环

Rainfall Monitoring Using a Microwave Links Network:A Long-Term Experiment in East China

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Advances in Atmospheric Sciences 2023年第9期40卷 1567-1583页

作者： Xichuan LIU Kun ZHAO Mingzhong zou Kang PU Kun SONG School of Atmospheric Science Nanjing UniversityNanjing 210023China College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410003China River Management Division Jiangyin 214400China Beijing Institute of Applied Meteorology Beijing 100029China

The first long-term rainfall monitoring experiment using the commercial microwave links(CMLs)network in East China is *** network,located in Jiangyin,Jiangsu Province,consists of 49 links with frequencies ranging from 15 GHz to 26 GHz and lengths from 1.14 km to 4.78 *** OTT PARSIVEL disdrometer is deployed to refine the local rain-induced attenuation relationship,and the CML observations are compared simultaneously with five rain *** inversion parameters of the CML are optimized by minimizing the error of the accumulated rainfall of historical rainfall *** inversion results show that the daily accumulated rainfall retrieved by the CMLs agrees well with the rain gauge *** an opportunistic approach to monitor near-surface rainfall with high spatiotemporal representativeness and accuracy,the CML network can be used to monitor and forecast urban flood disasters,especially in regions where the widepread deployment of conventional meteorological instruments is impractical.

关键词： rainfall monitoring microwave links rain rate inversion path-average rainfall accumulation rainfall field

Multivariate statistical analysis of chemical and stable isotopic data as indicative of groundwater evolution with reduced exploitation

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Geoscience Frontiers 2023年第1期14卷 133-148页

作者： Fei Liu Jingkun Zhang Shiqin Wang Jiawen zou Pinna Zhen School of Water Conservancy and Hydropower Hebei University of Engineering19 Taiji RoadHandanHebei 056038China Hebei Key Laboratory of Intelligent Water Conservancy HandanHebei 056038China Key Laboratory of Agricultural Water Resources Center for Agricultural Resources ResearchInstitute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuang 050021China

Groundwater resources in the North China Plain(NCP)are undergoing tremendous changes in response to the operation of groundwater exploitation reduction(GWER)*** identify groundwater evolution in this complex context,hierarchical cluster analysis(HCA)and principal component analysis(PCA)were combined to interpret an integrated dataset of stable isotopes and chemical data from four sampling campaigns in a pilot area of groundwater *** proposed a novel HCA approach integrating stable isotopes and chemical signals,which successfully partitioned the groundwater samples into the unconfined and the confined water *** isotopic evidence showed that the lateral inflow and the surface water may contribute more to groundwater recharge in this region than local modern *** unconfined water's main hydrochemical types were Na type with mixed anions,and Na-Cl-SO_(4)type,while the confined water was mainly Na-Cl and Na-SO_(4)*** processes mainly involved the dissolution/precipitation of halite,gypsum,Glauber's salt,feldspar,calcite and dolomite,as well as the cation *** results showed that water-rock interaction(i.e.,salinity-based and alkalinity-based processes)predominated the hydrochemical evolution,along with local nitrate contamination resulting from fertilizers and domestic *** GWER project regulated the natural evolution of unconfined water chemistry,and significantly reduced the unconfined water's salinity(mainly Na^(+),Mg^(2+),SO_(4)^(2-)).This may be attributed to upward leakage from low-salinity confined water at some parts of the ***,insignificant changes in the confined water's salinity reflected that the impact of GWER on the confined aquifer was *** study facilitates the groundwater classification effectively in the areas lack of geological data,and enhances the knowledge of groundwater chemical evolution in such a region where groundwater restoration is in progress,with i

关键词： Hydrochemistry Stable isotopes Groundwater evolution Groundwater exploitation reduction Hierarchical cluster analysis Principal component analysis

Effect of coal levels during direct reduction roasting of high phosphorus oolitic hematite ore in a tunnel kiln

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International Journal of Mining Science and Technology 2012年第3期22卷 323-328页

作者： Li Yongli Sun Tichang zou Anhua Xu Chengyan State Key Laboratory of High-Efficient Mining and Safety of Metal Mines Ministry of Education University of Science and Technology Beijing Beijing 100083 China

The effect of coal levels on phosphorus removal from a high phosphorus oolitic hematite ore after direct reduction roasting have been investigated. Raw ore, coal, and a dephosphorizatiou agent were mixed and the mixture was then roasted in a tunnel kiln. The roasted products were treated by two stages of grind- ing followed by magnetic separation. XRD and SEM-EDS examination of the products was used to analyze differences in the roasted products. The results show that coal is one of the most important factors affect- ing the direct reduction roasting process. When the inner coal levels increased from 0% to 15% the iron grade decreased linearly from 94.94%to 88.81% and the iron recovery increased from 55.94% to 92.94%. At the same time the phosphorus content increased from 0.045% to 0.231%. Increasing the inner coal levels also caused more hematite to be reduced to metallic iron but the oolitic structure of the roasted product was preserved in the presence of high coal loading. The phase of the phosphorus in raw ore was not changed after direct reduction roasting. The effect of coal on the phosphorus content in the H-concentrate arises from changes in the difficulty of mechanically liberating the metallic iron from the phosphorus bearing minerals.

关键词： High phosphorus oolitic hematiteDirect reduction roastingRemoval phosphorusMagnetic separation

Analysis of a Convective Storm Crossing Poyang Lake in China

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Journal of Meteorological Research 2020年第3期34卷 529-545页

作者： Haibo zou Shuwen ZHANG Yanan LIU Weidong ZHANG Xixi YANG College of Atmosphere Sciences Lanzhou UniversityLanzhou 730000 Institute of Meteorological Sciences of Jiangxi Province Jiangxi Meteorological BureauNanchang 330046

A convective storm crossing Poyang Lake(PL)in China during 1200-1600 UTC on 13 May 2015 is *** results show that this storm occurs ahead of a 500-hPa trough with weak low-level temperature advection and a convectively stable layer between 925 and 850 hPa,and the tail of the storm is enhanced when its spearhead sweeps over PL after the *** to the heating and moistening of PL,the convectively stable layer over PL is destabilized;and instead,a deep(below 700 hPa)convectively unstable layer is ***,both the radiative cooling and the storm-induced cooling result in a rapid air(near-surface)and land temperature decrease in the surrounding ***,a large lake-land temperature difference(about 6℃)occurs,which is conducive to generating land-lake breeze and enhancing the convergence of the low-level ***,the PL-induced deep convectively unstable layer and the enhanced low-level convergence jointly strengthen the crossing *** further confirm this,two simulations(with or without PL)are conducted with the Weather Research and Forecast(WRF)*** simulation with PL successfully reproduces the evolution of the storm crossing PL,while the simulation without PL *** the simulation with PL,a highμse tongue at 850 hPa associated with the storm moves eastward and downward,and merges with the PL-induced lake boundary layer,forming a deep convectively unstable layer under 700 ***,in the simulation without PL,the stable layer constantly maintains under 900 *** addition,the 900-hPa wind difference between the simulations with and without PL shows a land-lake breeze circulation that strengths the convergence of the low-level wind.

关键词： Poyang Lake(PL) lake-enhanced precipitation lake–land breeze convective instability

Event-Triggered Moving Horizon Pose Estimation for Spacecraft Systems

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Journal of Beijing Institute of Technology 2022年第4期31卷 382-390页

作者： Shuangxi Li Hengguang zou Dawei Shi Junzheng Wang School of Automation Beijing Institute of TechnologyBeijing 100081China China Academy of Space Technology Beijing 100094China

An event-triggered moving horizon estimation strategy is proposed for spacecraft pose *** error dual quaternion is used to describe the system state and construct the spacecraft attitude-orbit coupled *** order to reduce the energy consumption on spacecraft,an event-triggered moving horizon estimator(MHE)is designed for real-time pose estimation with limited communication *** model mismatch caused by event-triggered is finally solved by solving the cost function of the min-max optimization *** system simulation model is built in Matlab/Simulink,and the spacecraft pose estimation simulation is carried *** numerical results demonstrate that the designed estimator could ensure the estimation effect and save spacecraft communication and computing resources effectively.

关键词： state estimation pose estimation event-triggered moving horizon estimation

A Distributed Heuristic Algorithm on Delay-Constrained Least-Cost Unicast Routing

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A Distributed Heuristic Algorithm on Delay-Constrained Least...