A large number of new varieties, especially hybrid rice, have been developed and released in China since 1998. The yield potential and grain quality of hybrid rice have also been improved significantly both for three-...A large number of new varieties, especially hybrid rice, have been developed and released in China since 1998. The yield potential and grain quality of hybrid rice have also been improved significantly both for three-line and two-line hybrid rice including indica and japonica types as well. The trends on extension of rice varieties in China since 1986 has been marked by the increasing number of new varieties, decreasing annual planting area per variety, decreasing number of varieties with a large-scale extension area, while both the renewal rate and the proportion of core varieties with cross-provincial extension have remained unchanged. This current major problems and future goals of rice breeding and extension in China were also discussed.展开更多
Since the late 1980s,there has been a resurgence of regionalism in world politics.Prospects for new alliances are opened up often on a regional basis.In East and Southeast Asia,regionalization is becoming evident in h...Since the late 1980s,there has been a resurgence of regionalism in world politics.Prospects for new alliances are opened up often on a regional basis.In East and Southeast Asia,regionalization is becoming evident in higher education,with both awareness and signs of a rising ASEAN+3 higher education community.The quest for regional influence in Southeast Asia,however,has not been immune from controversies.One fact has been China’s growing soft power.As a systematically planned soft power policy,China is projecting soft power actively through higher education in the region.Yet,China-ASEAN relations in higher education have been little documented.Unlike the mainstay of the practices of internationalization in higher education that focuses overwhelmingly on educational exchange and collaboration with affluent Western countries,China’s interactions with ASEAN member countries in higher education are fulfilled by“quiet achievers,”mainly seen at the regional institutions in relatively less developed provinces such as Guangxi and Yunnan.This article selects regional higher education institutions in China’s much disadvantaged provinces to depict a different picture to argue that regionalization could contribute substantially to internationalization,if a variety of factors are combined properly.展开更多
In the early 1980s, Chinese meteorologists discovered the positive correlation in summer rainfall between India and North China and the correlation was later confirmed by some researches in and outside China. Based on...In the early 1980s, Chinese meteorologists discovered the positive correlation in summer rainfall between India and North China and the correlation was later confirmed by some researches in and outside China. Based on a variety of meteorological data from 1951 to 2005 and numerical simulations, the present study investigates such a correlation between Indian summer monsoon （ISM） and precipitation in North China. Furthermore, we discuss the intrinsic relations of the positive （Northwest India）-negative （the Tibetan Plateau）-positive （North China） precipitation anomaly teleconnection pattern from two aspects of thermal and dynamical factors, which not only confirms the precipitation teleconnection previously discovered again, but also reveals the influence mechanism of the ISM on the rainfall in North China. The results show that： （1） When the ISM is strong （weak）, the precipitation in North China tends to be more （less） than normal; however, when the rainfall in North China is more （less） than normal, the probability of the strengthening （weakening） of the ISM is relatively lower. This implies that the ISM anomaly has more impact on the rainfall in North China. （2） The Indian low usually dominantly impacts the intensity of the ISM. When the Indian low deepens, the low troughs in mid-high latitudes are frequently strengthened, and the ridge of the western Pacific subtropical high （WPSH） extends westward. The southwesterly water vapor transport originated from low-latitudes and the southeasterly water vapor transport along the southwestern flank of the WPSH converge in North China, which is favorable for more rainfall there than normal, and vice versa. （3） The simulations from the regional climate model developed by National Climate Center （ReGCM_NCC） capture the salient feature of the precipitation teleconnection between India and North China. The simulated anomalous atmospheric existence of such a teleconnection from another circulations are close to observations, which confirms the angle.展开更多
文摘A large number of new varieties, especially hybrid rice, have been developed and released in China since 1998. The yield potential and grain quality of hybrid rice have also been improved significantly both for three-line and two-line hybrid rice including indica and japonica types as well. The trends on extension of rice varieties in China since 1986 has been marked by the increasing number of new varieties, decreasing annual planting area per variety, decreasing number of varieties with a large-scale extension area, while both the renewal rate and the proportion of core varieties with cross-provincial extension have remained unchanged. This current major problems and future goals of rice breeding and extension in China were also discussed.
文摘Since the late 1980s,there has been a resurgence of regionalism in world politics.Prospects for new alliances are opened up often on a regional basis.In East and Southeast Asia,regionalization is becoming evident in higher education,with both awareness and signs of a rising ASEAN+3 higher education community.The quest for regional influence in Southeast Asia,however,has not been immune from controversies.One fact has been China’s growing soft power.As a systematically planned soft power policy,China is projecting soft power actively through higher education in the region.Yet,China-ASEAN relations in higher education have been little documented.Unlike the mainstay of the practices of internationalization in higher education that focuses overwhelmingly on educational exchange and collaboration with affluent Western countries,China’s interactions with ASEAN member countries in higher education are fulfilled by“quiet achievers,”mainly seen at the regional institutions in relatively less developed provinces such as Guangxi and Yunnan.This article selects regional higher education institutions in China’s much disadvantaged provinces to depict a different picture to argue that regionalization could contribute substantially to internationalization,if a variety of factors are combined properly.
基金Supported by the National Plan on Key Basic Research and Development (2006CB403604).
文摘In the early 1980s, Chinese meteorologists discovered the positive correlation in summer rainfall between India and North China and the correlation was later confirmed by some researches in and outside China. Based on a variety of meteorological data from 1951 to 2005 and numerical simulations, the present study investigates such a correlation between Indian summer monsoon （ISM） and precipitation in North China. Furthermore, we discuss the intrinsic relations of the positive （Northwest India）-negative （the Tibetan Plateau）-positive （North China） precipitation anomaly teleconnection pattern from two aspects of thermal and dynamical factors, which not only confirms the precipitation teleconnection previously discovered again, but also reveals the influence mechanism of the ISM on the rainfall in North China. The results show that： （1） When the ISM is strong （weak）, the precipitation in North China tends to be more （less） than normal; however, when the rainfall in North China is more （less） than normal, the probability of the strengthening （weakening） of the ISM is relatively lower. This implies that the ISM anomaly has more impact on the rainfall in North China. （2） The Indian low usually dominantly impacts the intensity of the ISM. When the Indian low deepens, the low troughs in mid-high latitudes are frequently strengthened, and the ridge of the western Pacific subtropical high （WPSH） extends westward. The southwesterly water vapor transport originated from low-latitudes and the southeasterly water vapor transport along the southwestern flank of the WPSH converge in North China, which is favorable for more rainfall there than normal, and vice versa. （3） The simulations from the regional climate model developed by National Climate Center （ReGCM_NCC） capture the salient feature of the precipitation teleconnection between India and North China. The simulated anomalous atmospheric existence of such a teleconnection from another circulations are close to observations, which confirms the angle.
