【摘 要】
：
Comparative anatomy of two Artocarpus species was carried out to identify and describe anatomical characters in search of distinctive characters that could possibly be used to delimit the two taxa. Tr
【出 处】
：
Sciences in Cold and Arid Regions
论文部分内容阅读
Comparative anatomy of two Artocarpus species was carried out to identify and describe anatomical characters in search of distinctive characters that could possibly be used to delimit the two taxa. Transverse, tangential and radial longitudinal section
其他文献
为了建立高精度的恒星视位置计算模型,该文基于FORTRAN语言对Tycho-2星表进行读取,并分别绘制J2000.0时刻全球和中国区域恒星分布图;建立了一个新的恒星视位置计算模型,对天顶望远镜实测CCD星像进行处理,并与NOVAS-F程序的视位置计算结果进行比较,以此验证新的计算模型的可行性。实验结果表明,新的恒星视位置计算模型精度符合精密天文大地测量标准。
采用美国国家环境预报中心(NCEP)500 h Pa高度场逐日再分析资料,基于计算机客观识别方法,统计了1948~2012年5~8月东北冷涡活动过程。结果表明:共计发生东北冷涡过程956次,平均每年5~8月发生约14.7次;东北冷涡活动共4 129 d,5~8月平均分别为14 d、18 d、18 d和14 d,共64 d,占5~8月总天数的52%;5~8月东北冷涡过程以持续3~6 d为主,冷涡活动
德清地理信息专业学子爱心助学金发放仪式于8月18日启动,此次活动由浙江国遥信息技术有限公司和浙江正元发起,浙江中海达和浙江中测新图参与,浙江德清科技新城管委会举办,共资助20名学生。管委会副主任沈法根、浙江国遥总经理吴治陵等资助企业领导出席仪式。浙江国遥共资助5名学生,包括一本助学金(5000元/人/年)2人四年,二本助学金(4000元/人/年)3人四年,共计8.8万元爱心助学金,助其无忧完成
The temperature distributions of different parts of a subgrade were analyzed based on the results of three years of monitoring data from the Harbin-Qiqihaer Passenger Dedicated Line, a high-speed rail
On the basis of on-site measured data of the newly constructed Gonghe-Yushu Highway in a permafrost region, this paper analyzed thermal conditions of the subgrade with XPS insulated board according to
Recent years have seen a large number of high-speed railways built and will be built in seasonal frozen soil regions of China. Although high-speed railways are characterized by being fast, comfortable
At present, the monitoring of embankment deformation in permafrost regions along the Qinghai-Tibet Railway is mainly done manually. However, the harsh climate on the plateau affects the results greatl
Frost heave is an upward swelling of soil during cryogenic conditions in cold regions. It is caused by the accumulation of ice crystals in subgrade soil, which grow upwards when freezing temperatures
According to the technical characteristics of short fixed wheelbase of a high-speed carriage, a subgrade-track integrated space mechanical response analysis model is proposed for trains under the acti
将离散小波多分辨率分析(MRA)应用于归一化植被指数(NDVI)时间序列研究,分解NDVI原数据序列成不同时间尺度的子序列,从而进行植被动态变化分析。针对洞庭湖流域的NDVI时间序列进行多尺度分解,挖掘这些数据中潜在的植被季节性和年际变化,对其进行评估,并结合土地覆盖变化与降水趋势变化分析引起该变化的可能原因。结果表明:小波多分辨率分析能提取洞庭湖流域植被动态的相关信息,如NDVI的年际成分均值、