erect fold,upright fold

Using the relation between a matroid and its erections,especially the relation dealing with a special map f,this paper makes a concrete analysis of the concrete conditions for the erection of Vámos matroid.

通过利用一个拟阵与它的直立之间的关系,特别是通过处理一个拟阵与一个特殊映射f之间的关系,具体分析了Vámos拟阵的直立问题,得到了除去平凡情形,Vámos拟阵没有直立的结论。

The composition of town gas and properties given;analyzed was the new process for co-production of 50kt/a methane from excess town gas at the coal gas plant of Datong Coal Mines Group;by vertical retort and two-stage furnace for water-gas,coal gas produced,from which qualified methane can be produced by subsequent compression,conversion,de-carbonization,syntheses and distillation.

介绍了城市煤气的组分和性质;分析了大同煤矿集团煤气厂利用富余的城市煤气联产5万t/a甲醇新工艺的流程,由直立炉和水煤气两段炉生产的煤气经过压缩、变换、脱碳、精脱硫、合成、精馏作业后,可制得精甲醇;在设计、施工、投料过程中,该厂精心组织,严格把关,保证了一次开机成功。

The paper reports that based on one dimention space heat conduction theory of infinite flat plate, the mathematic model on heat transfer of vertical retort is established.

采用无限大平板一维空间导热理论 ,建立起直立炉传热数学模型。

Experimental study was conducted on flow characteristics of catalyst in a standpipe with f108 mm4 mm and height of 10 m.

对垂直立管中催化剂的流动性能进行了实验研究,测定了各种操作条件下立管中的轴向压力分布、催化剂循环速率以及附加吹气的影响。