针对目前GUI(graphical user interface,图形化用户界面)软件测试存在的复杂性和低效性问题,提出一种事件交互图树模型.将结构操作事件和系统交互事件相分离,建立组件树图和事件交互图模型,给出详细的GUI软件建模方法,并根据该模型设计...针对目前GUI(graphical user interface,图形化用户界面)软件测试存在的复杂性和低效性问题,提出一种事件交互图树模型.将结构操作事件和系统交互事件相分离,建立组件树图和事件交互图模型,给出详细的GUI软件建模方法,并根据该模型设计测试覆盖率标准和测试用例生成方法,最后应用到实际系统中取得良好效果,大大提高了GUI测试的质量和效率.展开更多
针对JSF(Java Server Faces)组件模型,给出了视图对应组件树结构的保存与恢复方法,设计了视图状态信息在客户端页面的保存与恢复算法,算法在利用加密(解密)方法防止视图状态信息泄露的同时,采用数据压缩(解压)技术有效减小了视图状态信...针对JSF(Java Server Faces)组件模型,给出了视图对应组件树结构的保存与恢复方法,设计了视图状态信息在客户端页面的保存与恢复算法,算法在利用加密(解密)方法防止视图状态信息泄露的同时,采用数据压缩(解压)技术有效减小了视图状态信息的大小.展开更多
The Natural Forest Protection(NFP) program is one of the Six Key Forestry Projects which were adopted by the Chinese Government since the 1980s to address important natural issues in China. It advanced to protecting a...The Natural Forest Protection(NFP) program is one of the Six Key Forestry Projects which were adopted by the Chinese Government since the 1980s to address important natural issues in China. It advanced to protecting and restoring the structures and functions of the natural forests through sustainable forest management. However, the role of forest carbon storage and tree carbon pool dynamics since the adoption of the NFP remains unknown. To address this knowledge gap, this study calculated forest carbon storage(tree, understory, forest floor and soil) in the forest region of northeastern(NE) China based on National Forest Inventory databases and field investigated databases. For tree biomass, this study utilized an improved method for biomass estimation that converts timber volume to total forest biomass; while for understory, forest floor and soil carbon storage, this study utilized forest type-specific mean carbon densities multiplied by their areas in the region. Results showed that the tree carbon pool under the NFP in NE China functioned as a carbon sink from 1998 to 2008, with an increase of 6.3 Tg C/yr, which was mainly sequestrated by natural forests(5.1 Tg C/yr). At the same time, plantations also acted as a carbon sink, reflecting an increase of 1.2 Tg C/yr. In 2008, total carbon storage in forests covered by the NFP in NE China was 4603.8 Tg C, of which 4393.3 Tg C was stored in natural forests and 210.5 Tg C in planted forests. Soil was the largest carbon storage component, contributing 69.5%–77.8% of total carbon storage; followed by tree and forest floor, accounting for 16.3%–23.0% and 5.0%–6.5% of total carbon storage, respectively. Understory carbon pool ranged from 1.9 to 42.7 Tg C, accounting for only 0.9% of total carbon storage.展开更多
文摘针对目前GUI(graphical user interface,图形化用户界面)软件测试存在的复杂性和低效性问题,提出一种事件交互图树模型.将结构操作事件和系统交互事件相分离,建立组件树图和事件交互图模型,给出详细的GUI软件建模方法,并根据该模型设计测试覆盖率标准和测试用例生成方法,最后应用到实际系统中取得良好效果,大大提高了GUI测试的质量和效率.
基金Under the auspices of Strategic Priority Research Program of Chinese Academy of Sciences(No.XDA05060200)National Key Technology Research and Development Program of China(No.2012BAD22B04)Visiting Professorship for Senior International Scientists of Chinese Academy of Sciences(No.2012T1Z0006)
文摘The Natural Forest Protection(NFP) program is one of the Six Key Forestry Projects which were adopted by the Chinese Government since the 1980s to address important natural issues in China. It advanced to protecting and restoring the structures and functions of the natural forests through sustainable forest management. However, the role of forest carbon storage and tree carbon pool dynamics since the adoption of the NFP remains unknown. To address this knowledge gap, this study calculated forest carbon storage(tree, understory, forest floor and soil) in the forest region of northeastern(NE) China based on National Forest Inventory databases and field investigated databases. For tree biomass, this study utilized an improved method for biomass estimation that converts timber volume to total forest biomass; while for understory, forest floor and soil carbon storage, this study utilized forest type-specific mean carbon densities multiplied by their areas in the region. Results showed that the tree carbon pool under the NFP in NE China functioned as a carbon sink from 1998 to 2008, with an increase of 6.3 Tg C/yr, which was mainly sequestrated by natural forests(5.1 Tg C/yr). At the same time, plantations also acted as a carbon sink, reflecting an increase of 1.2 Tg C/yr. In 2008, total carbon storage in forests covered by the NFP in NE China was 4603.8 Tg C, of which 4393.3 Tg C was stored in natural forests and 210.5 Tg C in planted forests. Soil was the largest carbon storage component, contributing 69.5%–77.8% of total carbon storage; followed by tree and forest floor, accounting for 16.3%–23.0% and 5.0%–6.5% of total carbon storage, respectively. Understory carbon pool ranged from 1.9 to 42.7 Tg C, accounting for only 0.9% of total carbon storage.
