Since taking office, the Trump administration's anti-terrorism policy has become increasingly clear. Its anti-terrorism measures and its internal and external anti-terrorism policies have introduced new features t...Since taking office, the Trump administration's anti-terrorism policy has become increasingly clear. Its anti-terrorism measures and its internal and external anti-terrorism policies have introduced new features that are distinct from those of the Obama administration. These include linking terrorism to Islam, violating traditional political correctness in order to enhance homeland security, sending large-scale troops to the Middle East, and delegating more authority to the US Defense Department and the Armed Forces. Trump's anti-terrorism policies have made obvious progress both at home and abroad. Along with the adjustment of its national security strategy, the status of the anti-terrorism policy in Trump's national security strategy and national defense strategy will decline.However, for the foreseeable future, anti-terrorism will remain an important issue for the Trump Administration, and in some circumstances,the investment for it may increase.展开更多
The aim of the international project “Global Land Ice Measurements from Space (GLIMS)" headed by the US Geological Survey is to establish a world wide glacier inventory based on satellite imagery.This data set w...The aim of the international project “Global Land Ice Measurements from Space (GLIMS)" headed by the US Geological Survey is to establish a world wide glacier inventory based on satellite imagery.This data set will form a first digital baseline study for future glacier monitoring.The presented GIS_based glacier inventory for King George Island is a case study for the area of the Antarctic Peninsula.In the database of the glacier inventory topographic information,specific glaciological parameters as well as metadata will be included.The topographic data consists of drainage basin limits,basin areas,altitudinal ranges,perimeters and mean lengths.Glaciological data sets should comprise information on glacier retreat in different periods,glacier velocities,ice thickness and bedrock topography as well as derived parameters.Modelled and measured mass balance parameters could be included as additional data layers.In particular,these metadata records must comprise background information on data accuracy and data sources and should be compatible with a future data model for the King George Island GIS (KGIS).Three examples illustrate that the GLIMS database will not only contain information valuable for glaciological applications,but also other environmental studies on the island will benefit from this standardised remote sensing data sets.Therefore,a very close link between the data models of KGIS and GLIMS has to be established to enable these synergisms.Finally,better access to historic aerial photography would enable a continuous record of glacier retreat from the beginning of the 1950’s onward.展开更多
The discussion of the conceptual system of the Chinese is, to a large extent, inseparable from Confucian thought, and its analysis should start from Confucius himself. He developed the idea of shiming （时命）, or the...The discussion of the conceptual system of the Chinese is, to a large extent, inseparable from Confucian thought, and its analysis should start from Confucius himself. He developed the idea of shiming （时命）, or the mandate of the times, after the idea of deming （德命）, or the mandate of virtue, encountered repeated setbacks. Shiming challenged the idea that ＂Heaven is aligned with the virtuous,＂ and coping with this challenge required an ultimate worldview of a more original nature. Confucius formed his ultimate world view of ＂benevolence＂ （ren ~） through the interaction between his internal and external psychological framework and his reflections and realizations. Gripped by this idea, he cultivated inward virtue and adhered to the Way while outwardly practicing benevolence, with the goal of becoming ＂a sage within and a king without.＂ The balancing of the interior and the exterior was the key to enjoying a rich and meaningful life.展开更多
Understanding how diaspore(hereafter‘seed’)morphology and orientation affect secondary seed dispersal by wind is important to link seed dispersal and post-dispersal processes,such as seed lodging,predation and germi...Understanding how diaspore(hereafter‘seed’)morphology and orientation affect secondary seed dispersal by wind is important to link seed dispersal and post-dispersal processes,such as seed lodging,predation and germination.This study aims to describe the effects of seed morphology and orientation on secondary seed dispersal by wind via mechanistic modelling.We extend the mechanistic model of Schurr et al.(2005)in order to describe how secondary seed dispersal by wind is affected by wind conditions,ground surface,seed morphology and orientation.The model simulates the initial landing orientations,dispersal distances and stopping orientations of individual seeds.To parameterize the model,we measured orientation-specific vertical seed projection and seed lift-off velocity(the wind speed at which a seed starts moving on the ground)of the asymmetric seeds of heterocarpous Zygophyllum xanthoxylon,and determined orientation-specific model parameters that depend on properties of seeds and/or the environment.To validate the model,we conducted wind channel experiments in which we released seeds of Z.xanthoxylon onto a sand-coated tar paper,and recorded the initial landing orientations,dispersal distances and stopping orientations of the seeds.The extended model could precisely predict secondary dispersal distance,and explain up to 99%of variation in the observed proportions of seeds which stopped in various orientations.The model predicts that secondary dispersal distance increases with wind speed and decreases with aerodynamic roughness length,and that there might be a positive correlation between dispersal distance and germination success.展开更多
文摘Since taking office, the Trump administration's anti-terrorism policy has become increasingly clear. Its anti-terrorism measures and its internal and external anti-terrorism policies have introduced new features that are distinct from those of the Obama administration. These include linking terrorism to Islam, violating traditional political correctness in order to enhance homeland security, sending large-scale troops to the Middle East, and delegating more authority to the US Defense Department and the Armed Forces. Trump's anti-terrorism policies have made obvious progress both at home and abroad. Along with the adjustment of its national security strategy, the status of the anti-terrorism policy in Trump's national security strategy and national defense strategy will decline.However, for the foreseeable future, anti-terrorism will remain an important issue for the Trump Administration, and in some circumstances,the investment for it may increase.
文摘The aim of the international project “Global Land Ice Measurements from Space (GLIMS)" headed by the US Geological Survey is to establish a world wide glacier inventory based on satellite imagery.This data set will form a first digital baseline study for future glacier monitoring.The presented GIS_based glacier inventory for King George Island is a case study for the area of the Antarctic Peninsula.In the database of the glacier inventory topographic information,specific glaciological parameters as well as metadata will be included.The topographic data consists of drainage basin limits,basin areas,altitudinal ranges,perimeters and mean lengths.Glaciological data sets should comprise information on glacier retreat in different periods,glacier velocities,ice thickness and bedrock topography as well as derived parameters.Modelled and measured mass balance parameters could be included as additional data layers.In particular,these metadata records must comprise background information on data accuracy and data sources and should be compatible with a future data model for the King George Island GIS (KGIS).Three examples illustrate that the GLIMS database will not only contain information valuable for glaciological applications,but also other environmental studies on the island will benefit from this standardised remote sensing data sets.Therefore,a very close link between the data models of KGIS and GLIMS has to be established to enable these synergisms.Finally,better access to historic aerial photography would enable a continuous record of glacier retreat from the beginning of the 1950’s onward.
文摘The discussion of the conceptual system of the Chinese is, to a large extent, inseparable from Confucian thought, and its analysis should start from Confucius himself. He developed the idea of shiming （时命）, or the mandate of the times, after the idea of deming （德命）, or the mandate of virtue, encountered repeated setbacks. Shiming challenged the idea that ＂Heaven is aligned with the virtuous,＂ and coping with this challenge required an ultimate worldview of a more original nature. Confucius formed his ultimate world view of ＂benevolence＂ （ren ~） through the interaction between his internal and external psychological framework and his reflections and realizations. Gripped by this idea, he cultivated inward virtue and adhered to the Way while outwardly practicing benevolence, with the goal of becoming ＂a sage within and a king without.＂ The balancing of the interior and the exterior was the key to enjoying a rich and meaningful life.
基金The work was supported by the National Natural Science Foundation of China(31770504,32171870)the Special Funds for Fundamental Research in Central Public Research Institutes(CAFYBB2019MA004)+1 种基金the Sino-German(CSC-DAAD)Postdoc Scholarship Program(57165010,2015)the German Research Foundation(DFG)(DynNiche,SCHU 2259/5-1 and SCHU 2259/5-2).
文摘Understanding how diaspore(hereafter‘seed’)morphology and orientation affect secondary seed dispersal by wind is important to link seed dispersal and post-dispersal processes,such as seed lodging,predation and germination.This study aims to describe the effects of seed morphology and orientation on secondary seed dispersal by wind via mechanistic modelling.We extend the mechanistic model of Schurr et al.(2005)in order to describe how secondary seed dispersal by wind is affected by wind conditions,ground surface,seed morphology and orientation.The model simulates the initial landing orientations,dispersal distances and stopping orientations of individual seeds.To parameterize the model,we measured orientation-specific vertical seed projection and seed lift-off velocity(the wind speed at which a seed starts moving on the ground)of the asymmetric seeds of heterocarpous Zygophyllum xanthoxylon,and determined orientation-specific model parameters that depend on properties of seeds and/or the environment.To validate the model,we conducted wind channel experiments in which we released seeds of Z.xanthoxylon onto a sand-coated tar paper,and recorded the initial landing orientations,dispersal distances and stopping orientations of the seeds.The extended model could precisely predict secondary dispersal distance,and explain up to 99%of variation in the observed proportions of seeds which stopped in various orientations.The model predicts that secondary dispersal distance increases with wind speed and decreases with aerodynamic roughness length,and that there might be a positive correlation between dispersal distance and germination success.
