包括行政边界、建筑物、路网、河流、交通点等信息，从OSM上下载的。
上传资源想免费的，但是好像只能选择最少1积分。
有需要可以自行下载，也可以从OSM自行下载~
上传资源想免费的，但是好像只能选择最少1积分。
有需要可以自行下载，也可以从OSM自行下载~
2025/9/12 5:32:50
15.7MB
db工具，将mysql/postgresql数据库转成clickhouse。
可跳转至github下载（https://github.com/long2ice/synch）
可跳转至github下载（https://github.com/long2ice/synch）
2025/9/3 0:56:47
2.35MB
Theadventofmulticoreprocessorshasrenewedinterestintheideaofincorporatingtransactionsintotheprogrammingmodelusedtowriteparallelprograms.Thisapproach,knownastransactionalmemory,offersanalternative,andhopefullybetter,waytocoordinateconcurrentthreads.TheACI(atomicity,consistency,isolation)propertiesoftransactionsprovideafoundationtoensurethatcon-currentreadsandwritesofshareddatadonotproduceinconsistentorincorrectresults.Atahigherlevel,acomputationwrappedinatransactionexecutesatomically-eitheritcompletessuccessfullyandcommitsitsresultinitsentiretyoritaborts.Inaddition,isolationensuresthetransactionpro-ducesthesameresultasifnoothertransactionswereexecutingconcurrently.Althoughtransactionsarenotaparallelprogrammingpanacea,theyshiftmuchoftheburdenofsynchronizingandco-ordinatingparallelcomputationsfromaprogrammertoacompiler,toalanguageruntimesystem,ortohardware.Thechallengeforthesystemimplementersistobuildanefficienttransactionalmemoryinfrastructure.Thisbookpresentsanoverviewofthestateoftheartinthedesignandimplementationoftransactionalmemorysystems,asofearlyspring2010.
2025/8/30 22:51:16
1.81MB