在图形处理芯片GPU芯片架构设计过程中,针对C-model源代码管理,设计了一套检入管理系统CIMS(Check In Management System),并根据集合覆盖原理提出一种新的优选策略,用于筛选CIMS系统中的测试用例。实验表明,该算法获得的测试集合,在时...在图形处理芯片GPU芯片架构设计过程中,针对C-model源代码管理,设计了一套检入管理系统CIMS(Check In Management System),并根据集合覆盖原理提出一种新的优选策略,用于筛选CIMS系统中的测试用例。实验表明,该算法获得的测试集合,在时间约束条件下,能有效覆盖已有代码,充分发挥预检功能。展开更多
Biogeophysical effects of land use and land cover （LULC） changes play a significant role in modulating climate on various spatial scales. In this study, a set of recent LULC products with a spatial resolution of 500...Biogeophysical effects of land use and land cover （LULC） changes play a significant role in modulating climate on various spatial scales. In this study, a set of recent LULC products with a spatial resolution of 500 m was developed in China for update in RegCM4 （regional climate model version 4）. Two sets of comparative numerical experiments were conducted to study the effects of LULC changes on near-surface temperature simulation. The results show that after LULC changes, areas of crops and mixed woodlands as well as urban areas increase over entire China, accom- panied with greatly expanded mixed farming and forests/field mosaics in southern China, and reduced areas of 1） ir- rigated crops and short grasses in northern China and the Tibetan Plateau, and 2） semi-desert and desert in northwest-em China. Improvements in the LULC data clearly result in more accurate simulations of the near-surface temperat-ure. Specifically, increasing latent heat and longwave albedo due to enhanced LULC in certain areas lead to reduc-tion in land surface temperature （LST）, while changes in shortwave albedo and sensible heat also exert a great influ- ence on the LST. Overall, these parameter adjustments reduce the biases in near-surface temperature simulation.展开更多
文摘在图形处理芯片GPU芯片架构设计过程中,针对C-model源代码管理,设计了一套检入管理系统CIMS(Check In Management System),并根据集合覆盖原理提出一种新的优选策略,用于筛选CIMS系统中的测试用例。实验表明,该算法获得的测试集合,在时间约束条件下,能有效覆盖已有代码,充分发挥预检功能。
基金Supported by the China Meteorological Administration Special Public Welfare Research Fund(GYHY201506001)Gansu Provincial Meteorological Bureau Key Research Project(GSMAZd2017-10)
文摘Biogeophysical effects of land use and land cover （LULC） changes play a significant role in modulating climate on various spatial scales. In this study, a set of recent LULC products with a spatial resolution of 500 m was developed in China for update in RegCM4 （regional climate model version 4）. Two sets of comparative numerical experiments were conducted to study the effects of LULC changes on near-surface temperature simulation. The results show that after LULC changes, areas of crops and mixed woodlands as well as urban areas increase over entire China, accom- panied with greatly expanded mixed farming and forests/field mosaics in southern China, and reduced areas of 1） ir- rigated crops and short grasses in northern China and the Tibetan Plateau, and 2） semi-desert and desert in northwest-em China. Improvements in the LULC data clearly result in more accurate simulations of the near-surface temperat-ure. Specifically, increasing latent heat and longwave albedo due to enhanced LULC in certain areas lead to reduc-tion in land surface temperature （LST）, while changes in shortwave albedo and sensible heat also exert a great influ- ence on the LST. Overall, these parameter adjustments reduce the biases in near-surface temperature simulation.
