Abstract. Query optimizers in object-relational database management systems require users to provide the execution cost models of user-defined functions(UDFs). Despite this need, however, there has been little work done to provide such a model. Furt
T he concept and descr iption of a remote sensing aerosol monitoring network initiated by NASA, developed to sup- port NASA, CNES, and NASDA’s Earth satellite systems under the name AERONET and expanded by national and international collaboration, i
大小392k C:\Documents and Settings\Admin>wget -h GNU Wget 1.11.4, a non-interactive network retriever. Usage: wget [OPTION]... [URL]... Mandatory arguments to long options are mandatory for short options too. Startup: -V, --version display the vers
GNU Wget 1.11.4，非交互式的网络文件下载工具。 用法： wget [选项]... [URL]... Mandatory arguments to long options are mandatory for short options too. Startup: -V, --version display the version of Wget and exit. -h, --help print this help. -b, --bac kground go to backgr
GNU Wget 1.11.4，非交互式的网络文件下载工具。 用法： wget [选项]... [URL]... Mandatory arguments to long options are mandatory for short options too. Startup: -V, --version display the version of Wget and exit. -h, --help print this help. -b, --bac kground go to backgr
