We have developed a data object description tool suite and service for Athena consisting of :a language grammar based upon an extended proper subset of IDL 2.0,a compiler front end based upon this language grammar,Jav...We have developed a data object description tool suite and service for Athena consisting of :a language grammar based upon an extended proper subset of IDL 2.0,a compiler front end based upon this language grammar,JavaCC,and a Java Reflection API-like interface,and several compiler back ends which meet specific needs in ATLAS such as automatic generation of object converters and data object scripting interfaces.We present here details of our work and experience to date on the Athena Definition Language and Athena Data Dictionary.展开更多
1 If astronauts want to stay on the Moon for more than a few days,they must find local resources,and water is one of the most crucial ones.Scientists believe there's water on the Moon,but they're unsure of whe...1 If astronauts want to stay on the Moon for more than a few days,they must find local resources,and water is one of the most crucial ones.Scientists believe there's water on the Moon,but they're unsure of where it lies.2 Two probes are on their way to the Moon to solve this mystery.They will be launched on the same SpaceX Falcon 9 rocket from Cape Canaveral.If everything goes as planned,the first probe to reach the Moon will be Athena.Timothy Crain,the chief technology officer of Intuitive Machines,says it will take about 3 to 4 days,depending on the launch time.They'll orbit the Moon for 2 to 3 days to wait for the Sun to reach the landing site,because the lander's solar panels need sunlight to generate power.It only takes about 15 minutes to land softly after the engine is started.展开更多
文摘We have developed a data object description tool suite and service for Athena consisting of :a language grammar based upon an extended proper subset of IDL 2.0,a compiler front end based upon this language grammar,JavaCC,and a Java Reflection API-like interface,and several compiler back ends which meet specific needs in ATLAS such as automatic generation of object converters and data object scripting interfaces.We present here details of our work and experience to date on the Athena Definition Language and Athena Data Dictionary.
文摘1 If astronauts want to stay on the Moon for more than a few days,they must find local resources,and water is one of the most crucial ones.Scientists believe there's water on the Moon,but they're unsure of where it lies.2 Two probes are on their way to the Moon to solve this mystery.They will be launched on the same SpaceX Falcon 9 rocket from Cape Canaveral.If everything goes as planned,the first probe to reach the Moon will be Athena.Timothy Crain,the chief technology officer of Intuitive Machines,says it will take about 3 to 4 days,depending on the launch time.They'll orbit the Moon for 2 to 3 days to wait for the Sun to reach the landing site,because the lander's solar panels need sunlight to generate power.It only takes about 15 minutes to land softly after the engine is started.
