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Impact of climate and human activity on NDVI of various vegetation types in the Three-River Source Region, China

Journal of Arid Land 2024年第8期16卷 1080-1097页

作者： LU Qing KANG Haili zhang fuqing XIA Yuanping YAN Bing Research Center of Resource and Environment Economics East China University of TechnologyNanchang 330013China Jiangxi Key Laboratory of Watershed Ecological Process and Information East China University of TechnologyNanchang 330013China School of Surveying and Geoinformation Engineering East China University of TechnologyNanchang 330013China Nanchang Key Laboratory of Landscape Process and Territorial Spatial Ecological Restoration East China University of TechnologyNanchang 330013China Institute of Energy Research Jiangxi Academy of SciencesNanchang 330096China

The Three-River Source Region(TRSR)in China holds a vital position and exhibits an irreplaceable strategic importance in ecological preservation at the national *** the basis of an in-depth study of the vegetation evolution in the TRSR from 2000 to 2022,we conducted a detailed analysis of the feedback mechanism of vegetation growth to climate change and human activity for different vegetation *** the growing season,the spatiotemporal variations of normalized difference vegetation index(NDVI)for different vegetation types in the TRSR were analyzed using the Moderate Resolution Imaging Spectroradiometer(MODIS)-NDVI data and meteorological data from 2000 to *** addition,the response characteristics of vegetation to temperature,precipitation,and human activity were assessed using trend analysis,partial correlation analysis,and residual *** indicated that,after in-depth research,from 2000 to 2022,the TRSR's average NDVI during the growing season was *** preliminary ranking of the average NDVI for different vegetation types was as follows:shrubland(0.5762)>forest(0.5443)>meadow(0.4219)>highland vegetation(0.2223)>steppe(0.2159).The NDVI during the growing season exhibited a fluctuating growth trend,with an average growth rate of 0.0018/10a(P<0.01).Notably,forests displayed a significant development trend throughout the growing season,possessing the fastest rate of change in NDVI(0.0028/10a).Moreover,the upward trends in NDVI for forests and steppes exhibited extensive spatial distributions,with significant increases accounting for 95.23%and 93.80%,*** sensitivity to precipitation was significantly enhanced in other vegetation types other than highland *** contrast,steppes,meadows,and highland vegetation demonstrated relatively high vulnerability to temperature fluctuations.A further detailed analysis revealed that climate change had a significant positive impact on the TRSR from 2000 to 2022,particularly in its

关键词： growing season normalized difference vegetation index(NDVI) highland vegetation trend analysis partial correlation analysis residual analysis contribution rate

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针刺联合舌压抗阻反馈训练治疗中风后吞咽障碍:一项随机对照试验

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Journal of Acupuncture and Tuina Science 2024年第2期22卷 121-126页

作者：杨健峰党玉兰庞一强张馥晴(翻译) The Fourth Hospital of Baotou Inner Mongolia Autonomous RegionBaotou 014030China 不详

目的:观察通关利窍针刺法联合舌压抗阻反馈训练治疗中风后吞咽障碍患者的疗效。方法:采用前瞻性随机对照研究,将120例中风后吞咽障碍患者采用随机数字表法分为对照组与观察组,每组60例。两组均采用常规治疗,对照组加用舌压抗阻反馈训练... 详细信息

目的:观察通关利窍针刺法联合舌压抗阻反馈训练治疗中风后吞咽障碍患者的疗效。方法:采用前瞻性随机对照研究,将120例中风后吞咽障碍患者采用随机数字表法分为对照组与观察组,每组60例。两组均采用常规治疗,对照组加用舌压抗阻反馈训练治疗;观察组在对照组干预基础上加用通关利窍针刺法。两组治疗4周后进行临床疗效评价并总结治疗期间并发症发生情况。治疗前及治疗4周后进行藤岛一郎吞咽困难分级量表(FILS)评分和吞咽障碍特异性生活质量问卷(SWAL-QOL)评分。结果:观察组总有效率高于对照组(P0.05)。结论:在常规治疗基础上,通关利窍针刺法联合舌压抗阻反馈训练治疗中风后吞咽障碍的疗效较好,可有效改善患者吞咽功能,提高生活质量,且安全性较好。

关键词：针刺疗法中风后遗症假性延髓麻痹吞咽障碍舌压抗阻反馈训练随机对照试验

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基于层次分析法和属性约简的配网带电作业安全性量化评估方法

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焦作大学学报 2024年第3期38卷 68-72页

作者：张福庆中国人民解放军93756部队教研部特设教研室天津300131

针对因配网带电作业环境中特征难提取、指标权重计算误差大导致的评估难度高问题,提出一种基于层次分析法和属性约简的安全性量化评估方法来实现有效解决。采用线性关联分析法,求解与作业安全性之间存在线性关联的安全量化指标:带电运... 详细信息

针对因配网带电作业环境中特征难提取、指标权重计算误差大导致的评估难度高问题,提出一种基于层次分析法和属性约简的安全性量化评估方法来实现有效解决。采用线性关联分析法,求解与作业安全性之间存在线性关联的安全量化指标:带电运行状态、运行年限、设备故障率以及配网带电过载率,给出计算公式,并求得具体属性表达。建立层次分析法和属性简约相融合的安全性量化评估方法,将得到的量化指标作为影响因子,给出与每个层次都对应的评价指标,建立评级等级,实行评估指标对比,设计判定矩阵和权重计算矩阵,将作业参数代入求得加权数值,实现有效评估。实验结果证明,所提方法对配网带电作业的安全性评估精准度较高,具有较强的鲁棒性和可靠性,实用效果较佳。

关键词：层次分析法属性约简配网带电作业安全性量化评估线性关联分析法

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膝部调衡法推拿治疗鹅足滑囊炎临床观察

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Journal of Acupuncture and Tuina Science 2024年第2期22卷 147-153页

作者：黄裕鹏吴铅淡齐伟张馥晴(翻译) Quanzhou Orthopedic-Traumatological Hospital of Fujian Traditional Chinese Medicine University Quanzhou 362000China Shenzhen Bao’an Authentic TCM Therapy Hospital Shenzhen 518101China 不详

目的:观察膝部调衡法推拿治疗鹅足滑囊炎(PAB)的临床疗效和安全性。方法:纳入PAB患者64例,以随机数字表法将其分为推拿组和药物组,每组32例。药物组采用扶他林外用治疗,推拿组给予基于辨构论治的膝部调衡法推拿治疗。两组均连续治疗7 d... 详细信息

目的:观察膝部调衡法推拿治疗鹅足滑囊炎(PAB)的临床疗效和安全性。方法:纳入PAB患者64例,以随机数字表法将其分为推拿组和药物组,每组32例。药物组采用扶他林外用治疗,推拿组给予基于辨构论治的膝部调衡法推拿治疗。两组均连续治疗7 d。比较两组患者的疼痛视觉模拟量表(VAS)评分、Lyshlom评分、膝关节活动度(ROM)及总有效率,并观察两组患者的不良反应。结果:治疗过程中药物组脱落1例。推拿组总有效率为93.8%,药物组为83.9%,两组差异有统计学意义(P<0.05)。治疗后,与同组治疗前相比,两组患者的VAS评分均显著降低(P<0.05),Lyshlom评分及膝关节ROM值均显著增加(P<0.05)。两组VAS、Lyshlom评分及膝关节ROM值差异均有统计学意义(P<0.05)。结论:基于辨构论治的膝部调衡法推拿治疗PAB能有效缓解疼痛,改善膝关节功能,其疗效优于扶他林外用治疗。

关键词：推拿按摩辨构论治膝部调衡法推拿鹅足滑囊炎视觉模拟量表活动范围,关节

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Daily extreme precipitation and trends over China

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Science China Earth Sciences 2017年第12期60卷 2190-2203页

作者： SUN Jun zhang fuqing National Meteorological Center China Meteorological Administration Department of Meteorology and Atmospheric Sciences and Center for Advanced Data Assimilation and Predictability TechniquesPennsylvania State UniversityUniversity Park

Based on daily precipitation data of more than 2000 Chinese stations and more than 50 yr, we constructed time series of extreme precipitation based on six different indices for each station: annual and summer maximum(top-1) precipitation,accumulated amount of 10 precipitation maxima(annual, summer; top-10), and total annual and summer ***, we constructed the time series of the total number of stations based on the total number of stations with top-1 and top-10 annual extreme precipitation for the whole data period, the whole country, and six subregions, respectively. Analysis of these time series indicate three regions with distinct trends of extreme precipitation:(1) a positive trend region in Southeast China,(2) a positive trend region in Northwest China, and(3) a negative trend region in North China. Increasing(decreasing)ratios of 10–30% or even >30% were observed in these three regions. The national total number of stations with top-1 and top-10 precipitation extremes increased respectively by 2.4 and 15 stations per decade on average but with great inter-annual *** have been three periods with highly frequent precipitation extremes since 1960:(1) early 1960 s,(2) middle and late 1990 s,and(3) early 21 st century. There are significant regional differences in trends of regional total number of stations with top-1 and top-10 precipitation. The most significant increase was observed over Northwest China. During the same period, there are significant changes in the atmospheric variables that favor the decrease of extreme precipitation over North China: an increase in the geopotential height over North China and its upstream regions, a decrease in the low-level meridional wind from South China coast to North China, and the corresponding low moisture content in North China. The extreme precipitation values with a50-year empirical return period are 400–600 mm at the South China coastal regions and gradually decrease to less than 50

关键词： Extreme precipitation(EP) Extreme precipitation event(EPE) Time series Total annual number of stations Extreme event return level

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Mesoscale Predictability of Moist Baroclinic Waves: Variable and Scale-dependent Error Growth

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Advances in Atmospheric Sciences 2014年第5期31卷 995-1008页

作者： BEI Naifang fuqing zhang School of Human Settlements and Civil Engineering Xi'an Jiaotong University Department of Meteorology the Pennsylvanian State University University ParkPennsylvania 16802 USA

This study seeks to quantify the predictability of different forecast variables at various scales through spectral analysis of the difference between perturbed and unperturbed cloud-permitting simulations of idealized moist baroclinic waves amplify- ing in a conditionally unstable atmosphere. The error growth of a forecast variable is found to be strongly associated with its reference-state （unperturbed） power spectrum and slope, which differ significantly from variable to variable. The shallower the reference state spectrum, the more spectral energy resides at smaller scales, and thus the less predictable the variable since the error grows faster at smaller scales before it saturates. In general, the variables with more small-scale components （such as vertical velocity） are less predictable, and vice versa （such as pressure）. In higher-resolution simulations in which more rigorous small-scale instabilities become better resolved, the error grows faster at smaller scales and spreads to larger scales more quickly before the error saturates at those small scales during the first few hours of the forecast. Based on the reference power spectrum, an index on the degree of lack （or loss） of predictability （LPI） is further defined to quantify the predictive time scale of each forecast variable. Future studies are needed to investigate the scale- and variable-dependent predictability under different background reference flows, including real case studies through ensemble experiments.

关键词： predictability baroclinic waves error growth mesoscale

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PERC背钝化工艺卡点位置缺陷导致EL不良研究

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太阳能学报 2024年第8期45卷 385-390页

作者：张福庆李文涛张若凡胡明强张朔龙晶澳太阳能有限公司邢台055550

以二合一管式PECVD背钝化镀膜工艺过程中出现的石墨舟空心卡点EL发黑品质异常为研究对象,分析讨论二合一管式PECVD背钝化工艺中射频功率、工艺温度、氧化铝沉积厚度等对晶硅太阳电池空心卡点EL发黑品质异常的影响。结果表明,在二合一管... 详细信息

以二合一管式PECVD背钝化镀膜工艺过程中出现的石墨舟空心卡点EL发黑品质异常为研究对象,分析讨论二合一管式PECVD背钝化工艺中射频功率、工艺温度、氧化铝沉积厚度等对晶硅太阳电池空心卡点EL发黑品质异常的影响。结果表明,在二合一管式PECVD背钝化工艺时采用12~16 nm厚度的氧化铝薄膜、350~370℃的预淀积工艺温度,能有效解决镀膜空心卡点EL发黑品质异常,显著提升晶硅太阳电池在二合一管式PECVD的镀膜品质。

关键词：太阳电池 EL发黑背钝化预淀积二合一管式PECVD 卡点钝化缺陷

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EI/P25/Zr-MOFs异质结的构筑及催化产氢性能

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高等学校化学学报 2024年第3期45卷 94-102页

作者：牟迪吴海洋张楠琦安兆坤何漩张富青赵雷陈辉方伟杜星王大珩李薇馨武汉科技大学省部共建耐火材料与冶金国家重点实验室武汉430081 武汉工程大学化学与环境工程学院武汉430070

UiO-66-NH_(2)(NUO)因具有优异的水稳定性被用于光催化分解水制氢,但其制氢效率仍有待提升.本文在NUO前驱体溶液中加入2-(2-芴基)-4,5-1-溴二苯基-咪唑(EI)和二氧化钛P25,采用水热法合成EI/P25/NUO异质结.与单一Zr-MOFs和二元EI/NUO相比... 详细信息

UiO-66-NH_(2)(NUO)因具有优异的水稳定性被用于光催化分解水制氢,但其制氢效率仍有待提升.本文在NUO前驱体溶液中加入2-(2-芴基)-4,5-1-溴二苯基-咪唑(EI)和二氧化钛P25,采用水热法合成EI/P25/NUO异质结.与单一Zr-MOFs和二元EI/NUO相比,EI/P25/NUO异质结可见光驱动的光催化产氢速率可达6530.60μmol·g^(-1)·h^(-1),分别为NUO和EI/NUO产氢速率的304倍和34倍.这是由于EI的引入可有效提高体系中光生载流子的浓度,电子传输层P25则可促进EI产生的光生电子向NUO间的转移,降低光生载流子的复合几率,从而进一步提升光催化分解水制氢性能.

关键词： EI/P25/NUO异质结光催化制氢电荷转移

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Coupling Ensemble Kalman Filter with Four-dimensional Variational Data Assimilation

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Advances in Atmospheric Sciences 2009年第1期26卷 1-8页

作者： fuqing zhang Meng zhang James A. HANSEN Department of Meteorology Pennsylvania State University University Park Pennsylvania USA Navy Research Laboratory Monterrey California USA

This study examines the performance of coupling the deterministic four-dimensional variational assimilation system （4DVAR） with an ensemble Kalman filter （EnKF） to produce a superior hybrid approach for data assimilation. The coupled assimilation scheme （E4DVAR） benefits from using the state-dependent uncertainty provided by EnKF while taking advantage of 4DVAR in preventing filter divergence： the 4DVAR analysis produces posterior maximum likelihood solutions through minimization of a cost function about which the ensemble perturbations are transformed, and the resulting ensemble analysis can be propagated forward both for the next assimilation cycle and as a basis for ensemble forecasting. The feasibility and effectiveness of this coupled approach are demonstrated in an idealized model with simulated observations. It is found that the E4DVAR is capable of outperforming both 4DVAR and the EnKF under both perfect- and imperfect-model scenarios. The performance of the coupled scheme is also less sensitive to either the ensemble size or the assimilation window length than those for standard EnKF or 4DVAR implementations.

关键词： data assimilation four-dimensional variational data assimilation ensemble Kalman filter Lorenz model hybrid method

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Assimilation of All-sky Geostationary Satellite Infrared Radiances for Convection-Permitting Initialization and Prediction of Hurricane Joaquin(2015)

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Advances in Atmospheric Sciences 2022年第11期39卷 1859-1872页

作者： Lei ZHU Zhiyong MENG Yonghui WENG fuqing zhang Key Laboratory of Meteorological Disaster Ministry of Education(KLME)/Joint International Research Laboratory of Climate and Environmental Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science and TechnologyNanjing 210044China Laboratory for Climate and Ocean–Atmosphere Studies Department of Atmospheric and Oceanic SciencesSchool of PhysicsPeking UniversityBeijing 100871China I.M.System Group(IMSG) at Environmental Modeling Center(EMC)NCEPNWSNOAACollege ParkMD 20740USA Department of Meteorology and Atmospheric Science and Center for Advanced Data Assimilation and Predictability TechniquesThe Pennsylvania State UniversityUniversity ParkPennsylvania 16802USA

Intensity forecasting is one of the most challenging aspects of tropical cyclone(TC) forecasting. This work examines the impact of assimilating high-resolution all-sky infrared radiance observations from geostationary satellite GOES-13 on the convection-permitting initialization and prediction of Hurricane Joaquin(2015) with an ensemble Kalman filter(EnKF)based on the Weather Research and Forecasting(WRF) model. Given that almost all operational global and regional models struggled to capture Hurricane Joaquin(2015)'s intensity, this study examines the potential in improving Joaquin's prediction when assimilating all-sky infrared radiances from GOES-13's water vapor channel. It is demonstrated that, after a few 3-hour cycles assimilating all-sky radiance, the WRF model was able to forecast reasonably well Joaquin's intensity,including its rapid intensification(RI). The improvement was largely due to a more realistic initial hurricane structure with a stronger, warmer, and more compact inner-core. Ensemble forecasts were used to further explore the important physical mechanisms driving the hurricane's RI. Results showed that the RI forecasts were greatly impacted by the initial inner-core vortex structure.

关键词： all-sky infrared radiance TC intensity EnKF inner-core structure

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