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Runoff reduction due to environmental changes in the Sanchuanhe river basin

International Journal of Sediment research 2008年第2期23卷 174-180页

作者： Guoqing WANG1,Jianyun ZHANG2,Ruimin HE3,Naiqian JIANG4,and Xin'ai JING5 1 Senior Engineer,State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,nanjing Hydraulic research Institute,nanjing 210098,china research center for climate change,mwr,nanjing 210029,china Yellow River Institute of Hydraulic research,Zhengzhou 450003,china 2 Prof.,3 Engineer,State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,nanjing Hydraulic research Institute,nanjing 210098,china 4 Prof.,5 Engineer,Yellow River Institute of Hydraulic research,Zhengzhou 450003,china Senior Engineer State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute Nanjing 210098 China research center for climate change MWR Nanjing 210029 China Yellow River Institute of Hydraulic research Zhengzhou 450003 China Prof. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute Nanjing 210098 China Engineer State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute Nanjing 210098 China Prof. Yellow River Institute of Hydraulic Research Zhengzhou 450003 China Engineer Yellow River Institute of Hydraulic Research Zhengzhou 450003 China

Recently,runoff in many river basins in china has been ***,the role that climate change and human activities are playing in this decrease is currently of *** this study,we evaluated an assessment method that was designed to quantitatively separate the effects of climate change and human activities on runoff in river ***,we calibrated the SIMHYD rainfall runoff model using naturally recorded hydro-meteorologic data pertaining to the Sanchuanhe River basin and then determined the effects of climate change and human activities on runoff by comparing the estimated natural runoff that occurred during the period in which humans disturbed the basin to the runoff that occurred during the period prior to disturbance by *** results of this study revealed that the SIMHYD rainfall runoff model performs well for estimating monthly *** addition,we found that absolute runoff reductions have increased in response to human activities and climate change,with average reductions of 70.1% and 29.9% in total runoff being caused by human activities and climate change,*** together,the results of this study indicate that human activities are the primary cause of runoff reduction in the Sanchuanhe River basin.

关键词： Sanchuanhe River Hydrological simulation climate change Human activities Impact

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Maximum Entropy Spectral Estimation Based on Accelerating Genetic Algorithm

Maximum Entropy Spectral Estimation Based on Accelerating Ge...

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2009中国控制与决策会议

作者： ZHANG Ming~(1,2),ZHANG Jian-yun~(2,3),JIN Ju-liang~4,WANG Guo-qing~(2,3),HE Rui-min~(2,3) 1.State Key Laboratory of Hydrology-water Resources and Hydraulic Engineering,Hohai University,nanjing 210098,china. 2.research center for climate change,mwr,nanjing,210029,china 3.nanjing Hydraulic research Institute,nanjing 210029,china. 4.School of Civil Engineering,Hefei University of Technology,Hefei 230009,china.

＜正＞The purpose of this paper was to solve the problems of spectral peak shifting and line splitting existing in Burg’s Maximum Entropy Spectral Analysis method（MESA）,to enhance the resolution of entropy spectral,and to increase the adaptability of spectral estimation algorithm to signal length,signal noise ratio and initial phase.A method of accelerating Genetic algorithm based maximum Entropy Spectral estimation method（GES） was proposed,where accelerating genetic algorithm was used to optimize the parameters of MESA and the four equivalent conditions of MESA were used as objective *** typical simulation cases indicated that the phenomenon of spectral peak shifting and line splitting were absent in the frequency spectral estimated by GES,and the ability to discriminate two closed frequency was *** with the traditional MESA methods,GES has good performances in signal processing.

关键词： maximum entropy spectral estimation Burg’s algorithm spectral peak shifting spectral line splitting accelerating genetic algorithm

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Temporally consistent video colorization with deep feature propagation and self-regularization learning

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Computational Visual Media 2024年第2期10卷 375-395页

作者： Yihao Liu Hengyuan Zhao Kelvin CKChan Xintao Wang Chen change Loy Yu Qiao Chao Dong Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China University of Chinese Academy of Sciences Beijing 100049China Department of Electrical&Computer Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798 Applied research center Tencent PCGShenzhenChina

Video colorization is a challenging and highly ill-posed *** recent years have witnessed remarkable progress in single image colorization,there is relatively less research effort on video colorization,and existing methods always suffer from severe flickering artifacts(temporal inconsistency)or unsatisfactory *** address this problem from a new perspective,by jointly considering colorization and temporal consistency in a unified ***,we propose a novel temporally consistent video colorization(TCVC)*** effectively propagates frame-level deep features in a bidirectional way to enhance the temporal consistency of ***,TCVC introduces a self-regularization learning(SRL)scheme to minimize the differences in predictions obtained using different time *** does not require any ground-truth color videos for training and can further improve temporal *** demonstrate that our method can not only provide visually pleasing colorized video,but also with clearly better temporal consistency than state-of-the-art methods.A video demo is provided at https://***/watch?v=c7dczMs-olE,while code is available at https://***/lyh-18/TCVC-Tem porally-Consistent-Video-Colorization.

关键词： video colorization temporal consistency feature propagation self-regularization

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Top 10 Influential Events in carbon neutrality and climate change response for 2023

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Frontiers in Energy 2024年第1期18卷 1-3页

作者： research Institute of Carbon Neutrality of Shanghai Jiao Tong University research Institute of Carbon Neutrality Shanghai Jiao Tong UniversityShanghai 200240China

In 2023, the global community intensified its efforts towards achieving carbon neutrality and addressing climate change, witnessing several impactful events. research Institute of Carbon Neutrality, Shanghai Jiao Tong University compiled the Top 10 Events (in chronological order) in the field of global carbon neutrality and climate change response for 2023, to share with readers these significant moments that document the ongoing ambition and collective efforts of human society.

关键词： neutral collective intensified

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Prediction model for spring dust weather frequency in North china

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Science china Earth Sciences 2008年第5期51卷 709-720页

作者： LANG XianMei center for Disastrous climate research and Prediction, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, china center for Disastrous climate research and Prediction Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China

It is of great social and scientific importance and also very difficult to make reliable prediction for dust weather frequency (DWF) in North china. In this paper, the correlation between spring DWF in Beijing and Tianjin observation stations, taken as examples in North china, and seasonally averaged surface air temperature, precipitation, Arctic Oscillation, Antarctic Oscillation, South Oscillation, near surface meridional wind and Eurasian westerly index is respectively calculated so as to construct a prediction model for spring DWF in North china by using these climatic factors. Two prediction models, i.e. model-I and model-II, are then set up respectively based on observed climate data and the 32-year (1970 -2001) extra-seasonal hindcast experiment data as reproduced by the nine-level Atmospheric General Circulation Model developed at the Institute of Atmospheric Physics (IAP9L-AGCM). It is indicated that the correlation coefficient between the observed and predicted DWF reaches 0.933 in the model-I, suggesting a high prediction skill one season ahead. The corresponding value is high up to 0.948 for the subsequent model-II, which involves synchronous spring climate data reproduced by the IAP9L-AGCM relative to the model-I. The model-II can not only make more precise prediction but also can bring forward the lead time of real-time prediction from the model-I’s one season to half year. At last, the real-time predictability of the two models is evaluated. It follows that both the models display high prediction skill for both the interannual variation and linear trend of spring DWF in North china, and each is also featured by different advantages. As for the model-II, the prediction skill is much higher than that of original approach by use of the IAP9L-AGCM alone. Therefore, the prediction idea put forward here should be popularized in other regions in china where dust weather occurs frequently.

关键词： spring dust weather frequency prediction model iap9l-agcm hindcast experiment real-time prediction

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Dynamic behavior of fragile X full mutations in cultured female fetal fibroblasts

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Acta Pharmacologica Sinica 2004年第7期25卷 127-130页

作者： Yu-jie SUN1,2,Xiao HAN1,3 1Laboratory of Functional Genomics at nanjing Medical University, nanjing 210029, china 2Division of Molecular Medicine in Beckman research Institute, Leslie and Susan Gonda (Goldschmied) Diabetes 3 and Genetics research center, City of Hope National Medical center, Duarte, California Laboratory of Functional Genomics at nanjing Medical University China City of Hope National Medical center Duarte California

AIM: Toassess mitotic stability ofthe fragile X fullmutations andits relationshipwith DNA methylation. METHODS: The length change of the expanded CGG repeats was examined and correlated it with the methylation status in the DNA samplesisolated fromthe fibroblasts derived from a fragile Xfemale fetus anda fragileX maleadult, respectively. RESULTS: A dramatic instability of the expanded CGG repeats in the female fetal fibroblasts was observed. South- ern blot analysis revealed that the 6.9-kb major expanded band detected in passage 2 was completely replaced by a 7.7-kb band after passage 30. Fibroblast clones derived from the passage 3 displayed an unstable expansion of the CGG repeat during clonal proliferation, while methylation status of the CGG repeat region was maintained. In contrast, in fragile X male fibroblasts the expanded CGG repeats were stable during clonal proliferation. CONCLUSION: The mitotic instability of expanded CGG repeat is not always restricted in early development window as proposed previously and other elements rather than DNA methylation could affect the stability of the expanded CGG repeats in fragile X female fetal fibroblast cells.

关键词： DNA female fetus fibroblasts fragile X syndrome heterozygote human mutation X chromo- some

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Support for research towards understanding the population health vulnerabilities to vector-borne diseases:increasing resilience under climate change conditions in Africa

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Infectious Diseases of Poverty 2017年第1期6卷 1462-1468页

作者： Bernadette Ramirez on behalf of the TDR-IDRC research Initiative on Vector Borne Diseases and climate change Vectors Environment and Society UnitSpecial Programme for Research and Training in Tropical Diseases(TDR)World Health Organization(WHO)GenevaSwitzerland

Background:Diseases transmitted to humans by vectors account for 17%of all infectious diseases and remain significant public health *** the years,great strides have been taken towards combatting vectorborne diseases(VBDs),most notably through large scale and coordinated control programmes,which have contributed to the decline of the global mortality attributed to ***,with environmental changes,including climate change,the impact on VBDs is anticipated to be significant,in terms of VBD-related hazards,vulnerabilities and *** there is growing awareness on the vulnerability of the African continent to VBDs in the context of climate change,there is still a paucity of research being undertaken in this area,and impeding the formulation of evidence-based health policy *** body:One way in which the gap in knowledge and evidence can be filled is for donor institutions to support research in this *** collaboration between the WHO Special Programme for research and Training in Tropical Diseases(TDR)and the International Centre for research and Development(IDRC)builds on more than 10 years of partnership in research capacity-building in the field of tropical *** this partnership was born yet another research initiative on VBDs and the impact of climate change in the Sahel and sub-Saharan *** paper lists the projects supported under this research initiative and provides a brief on some of the policy and good practice recommendations emerging from the ongoing implementation of the research ***:Data generated from the research initiative are expected to be uptaken by stakeholders(including communities,policy makers,public health practitioners and other relevant partners)to contribute to a better understanding of the impacts of social,environmental and climate change on VBDs(*** nature of the hazard,vulnerabilities,exposure),and improve the ability of African countries to adapt to and reduce the eff

关键词： Vector-borne diseases climate change Adaptation Resilience Malaria Schistosomiasis Rift Valley fever Human African trypanosomiasis

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Turbulent intensity and its similarity function over an Inner Mongolian grassland during spring

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Science china Earth Sciences 2010年第5期53卷 773-780页

作者： YUE Ping1,2,3, NIU ShengJie2, HU YinQiao4 & ZHANG Qiang1 1 Key Laboratory of Arid climate change and Reducing Disaster of Gansu Province, Key Laboratory of Arid climate change and Reducing Disaster of CMA, Institute of Arid Meteorology, CMA, Lanzhou 730020, china 2 nanjing University of Information Science and Technology, nanjing 210044, china 3 Zhangye National Meteorological Observatory, Zhangye 734000, china 4 Cold and Arid Regions Environmental and Engineering research Institute, Chinese Academy of Science, Lanzhou 730000, china Key Laboratory of Arid climate change and Reducing Disaster of Gansu Province Key Laboratory of Arid Climate Change and Reducing Disaster of CMA Institute of Arid Meteorology CMA Lanzhou China nanjing University of Information Science and Technology Nanjing China Zhangye National Meteorological Observatory Zhangye China Cold and Arid Regions Environmental and Engineering research Institute Chinese Academy of Science Lanzhou China

Macroscopic reason for the development of turbulences in fluid is the conjunction action of velocity and temperature shears. We use the 2008 spring flux observations in the surface layer over Inner Mongolian grassland, obtain the similarity functions of turbulent intensity under different stratification stability conditions, and calculate the clear day turbulent intensity in the spring, which is then analyzed and compared with the observed values of turbulent intensity. The results show that in the Inner Mongolian grassland, under the condition of spring unstable stratification of the surface layer, dependence of the similarity function of turbulent intensity on stratification stability follows a "2/3 power law". The structural function is a constant under the neutral stratification condition, and complicated under the stable condition. The calculated turbulent intensity has a close correlation with the observed one, which verifies the accuracy of the similarity functions and the suitability of the theorem of turbulent intensity in the grassland region.

关键词： turbulent intensity variance of velocity similarity function grassland

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Sea surface temperature east of Australia:A predictor of tropical cyclone frequency over the western North Pacific?

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Chinese Science Bulletin 2011年第2期56卷 196-201页

作者： ZHOU BoTao 1,2 & CUI Xuan 3 1 National climate center,china Meteorological Administration,Beijing 100081,china 2 Nansen-Zhu International research center,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,china 3 National Meteorological center,china Meteorological Administration,Beijing 100081,china National climate center China Meteorological Administration Beijing China Nansen-Zhu International research center Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China National Meteorological center China Meteorological Administration Beijing China

The relationship between sea surface temperature (SST) east of Australia and tropical cyclone frequency over the western North Pacific (WNPTCF) is analyzed by use of observation *** WNPTCF from June to October is correlated negatively to spring SST east of *** the spring SST is in the positive phase,a cyclonic circulation anomaly in the upper troposphere and an anticyclonic circulation anomaly in the lower troposphere prevail over the western North Pacific from June to October,concurrent with an anomalous atmospheric subsidence and an enlarged vertical zonal wind *** conditions are unfavorable for tropical cyclone genesis,and thus WNPTCF *** negative phase of the spring SST east of Australia leads to more tropical cyclones over the western North *** spring SST east of Australia may give rise to simultaneous change in tropical atmospheric circulation via the teleconnection wave train,and then subsequently affect atmospheric circulation variation over the western North Pacific.

关键词：热带气旋北太平洋澳大利亚西部海面温度热带大气环流预测频率

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Modeling the climate effects of different subregional uplifts within the Himalaya-Tibetan Plateau on Asian summer monsoon evolution

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Chinese Science Bulletin 2012年第35期57卷 4617-4626页

作者： ZHANG Ran 1,JIANG DaBang 1,2,3,LIU XiaoDong 4 & TIAN ZhiPing 2,5 1 climate change research center,Chinese Academy of Sciences,Beijing 100029,china 2 Nansen-Zhu International research Centre,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,china 3 Key Laboratory of Regional climate-Environment research for Temperate East Asia,Chinese Academy of Sciences,Beijing 100029,china 4 State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710075,china 5 Graduate University of Chinese Academy of Sciences,Beijing 100049,china climate change research center Chinese Academy of Sciences Nansen-Zhu International research Centre Institute of Atmospheric Physics Chinese Academy of Sciences Key Laboratory of Regional climate-Environment research for Temperate East Asia Chinese

Considering the different uplifting time of different subregions of the Himalaya-Tibetan Plateau(TP),a series of numerical simulations have been conducted with the Community Atmosphere Model(CAM4) developed at the National center for Atmospheric research to explore the effects of the phased tectonic uplift of the Himalaya-TP on the evolution of Asian summer *** results show that the uplifts of the Himalaya and northern TP significantly affect the evolutions of South Asian summer monsoon and northern East Asian summer monsoon *** is,the tectonic uplift of the Himalaya intensifies the South Asian summer monsoon circulation and increases the precipitation in South Asia,whereas the uplift of the northern TP intensifies the northern East Asian summer monsoon circulation and increases the precipitation in northern East *** with previous simulations,current comparative analyses of modeling results for different subregional uplifts within the Himalaya-TP help deepen our understanding of the evolutionary history of Asian monsoons.

关键词：青藏高原隆升喜马拉雅亚洲季风高原气候夏季季风次区域隆起演化建模

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