Central Asian countries are located in the heartland of the Eurasian Continent.Their geographic location puts their energy flows under tremendous geopolitical pressure from the countries along their limited number of ...Central Asian countries are located in the heartland of the Eurasian Continent.Their geographic location puts their energy flows under tremendous geopolitical pressure from the countries along their limited number of pipelines.With energy trade data from the United Nations Comtrade Statistics Database in the period from 2005 to 2016,this paper evaluates energy security of Kazakhstan and Turkmenistan（exporter） and Kyrgyzstan（importer） using three standards：correlativeness,diversity,and the impact of international relations.It concludes that Kazakhstan and Turkmenistan＇s oil markets are balanced in terms of correlation and diversification,and thus less subject to geopolitical pressure.Turkmenistan＇s gas markets,on the other hand,still have tremendous exposure to geopolitical risks for lack of diversification.Kyrgyzstan,as an energy importer,could rely on a few neighboring countries for energy supply.We found out that the three Central Asian countries＇ energy security is largely determined by four political factors：the relationship with Russia,the new ＂great game＂ in Eurasia,the rise of China,and Central Asian regional geopolitical configuration.展开更多
In the framework of the littlest Higgs model with T-parity （LHT）, we study the top quark spin correlation and polarization at the International Linear Collider （ILC）. We find that the top quark polarization asymme...In the framework of the littlest Higgs model with T-parity （LHT）, we study the top quark spin correlation and polarization at the International Linear Collider （ILC）. We find that the top quark polarization asymmetry δPt and the left-right asymmetry δALR can respectively reach -35% and -37.5% for s = 500 GeV and s = 1000 GeV via e＋e- collision, which can reach the observable level at the ILC. By contrast, the spin correlation δC is smaller. The correlation behaviors of these observables at the e＋e- collision and the yy, collision will be helpful to distinguish different models and test the LHT model at the ILC.展开更多
基金The Key Deployment Project of Chinese Academy of Sciences(ZDRW-ZS-2016-6-1-4)
文摘Central Asian countries are located in the heartland of the Eurasian Continent.Their geographic location puts their energy flows under tremendous geopolitical pressure from the countries along their limited number of pipelines.With energy trade data from the United Nations Comtrade Statistics Database in the period from 2005 to 2016,this paper evaluates energy security of Kazakhstan and Turkmenistan（exporter） and Kyrgyzstan（importer） using three standards：correlativeness,diversity,and the impact of international relations.It concludes that Kazakhstan and Turkmenistan＇s oil markets are balanced in terms of correlation and diversification,and thus less subject to geopolitical pressure.Turkmenistan＇s gas markets,on the other hand,still have tremendous exposure to geopolitical risks for lack of diversification.Kyrgyzstan,as an energy importer,could rely on a few neighboring countries for energy supply.We found out that the three Central Asian countries＇ energy security is largely determined by four political factors：the relationship with Russia,the new ＂great game＂ in Eurasia,the rise of China,and Central Asian regional geopolitical configuration.
文摘In the framework of the littlest Higgs model with T-parity （LHT）, we study the top quark spin correlation and polarization at the International Linear Collider （ILC）. We find that the top quark polarization asymmetry δPt and the left-right asymmetry δALR can respectively reach -35% and -37.5% for s = 500 GeV and s = 1000 GeV via e＋e- collision, which can reach the observable level at the ILC. By contrast, the spin correlation δC is smaller. The correlation behaviors of these observables at the e＋e- collision and the yy, collision will be helpful to distinguish different models and test the LHT model at the ILC.
