Web再之后就是 ClickHouse、Doris 这些开源的列式数据库,以及 Parquet、Orc 等开源的列存格式。前者更聚焦于极致的 OLAP 查询性能,提供更低的查询延迟,后者更聚焦于开放的存储格式,具备非常好的 Hadoop 生态兼容性,与各个大数据组件的深度集成,以及深度的压缩 ...
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WebORC is an Apache project. Apache is a non-profit organization helping open-source software projects released under the Apache license and managed with open governance and … Maven Central: ORC 1.8.3; SHA 256: a78678ec425c8129… Fixed issues: ORC … ORC Talks. Want to learn more about ORC? Watch some presentations and read … The Apache ORC Project Management Committee (PMC) elected William Hyun … Getting Help. Need help with ORC? Try these resources. Mailing Lists. The best … Timestamps. ORC includes two different forms of timestamps from the SQL … ORC as of Apache ORC 1.6 supports column encryption where the data and … http://blog.sina.com.cn/s/blog_3d5afcfc01030qi0.html gsm discount
有机朗肯循环系统研究综述 - usst.edu.cn
Web综合分析后,得到各系统的效益从大到小排如下:orc系统(r601)>蒸汽朗肯循环系统(中部取风)>orc系统(r141b)。烟气温度越低,orc系统的技术优势越明显;烟气温度较高时,则蒸汽朗肯循环系统占优。orc系统中采用工质r601和r141b时有较明显的技术优势。 Web(2)orc低温余热发电系统行业未来竞争格局和特点 (3)orc低温余热发电系统市场进入及竞争对手分析. 9.2.2 中国orc低温余热发电系统行业竞争力分析 (1)我国orc低温余热发 … WebApr 9, 2024 · 近日,中国首个“兆瓦级orc实验台”在位于南京经济技术开发区的天加能源基地落成。该实验台由南京天加能源科技有限公司和合肥通用机械研究院 ... gsmd national specialty