两级复叠,two-stage cascade
1)two-stage cascade两级复叠
1.To obtain a convenient and reliable pre-cooling method for research at-30 ℃ and-60 ℃,atwo-stage cascade cycle pre-cooling equipment was designed and set up.以研制工作在-30℃/-60℃温区的低温预冷设备为目标,自行设计和搭建了1个两级复叠式蒸气压缩制冷循环低温预冷设备,其中高温级循环采用R22作制冷剂,可以独立运行并在-30℃提供冷量;低温级循环采用R23作制冷剂,两级复叠运行时可在-60℃提供冷量。
英文短句/例句
1.Research on refrigerants alternative of two-stage cascade refrigeration units两级复叠低温制冷机组制冷剂的替代
2.Discussion on some problems of two-stage cascade refrigeration system两级复叠制冷系统设计中一些问题的探讨
3.Design of auto-cascade refrigeration system at 150K150K四级自动复叠制冷系统设计
4.Theory and Experimental Study on Two-stage Compression and Cascade Heat Pump;双级压缩复叠式热泵系统的理论和实验研究
5.THE EXPLORATORY RESEARCH ON MIXED REFRIGERANTS OF A FIVE-STAGE AUTOCASCADE REFRIGERATION SYSTEM一种五级自动复叠制冷系统混合工质的选择
6.double expansion compound steam engine两级膨胀复式蒸汽机
7.Study on Replacing of Nature Refrigerants Cascaded Refrigeration Cycle with CO_2 Working in Low Temperature Stage;CO_2为低温级的自然工质复叠式制冷循环替代研究
8.superincumbent bed【地质】复层, 叠层
9.The real dike pattern can be approximately duplicated theoretically by the superposition of two very simple stress fields.实际岩脉式从理论上可以通过两个最简单的应力场的叠加复现。
pound system of heat pump air-conditioning and refrigerator with two-stage compression两级压缩式热泵空调与冰箱复合系统
11.two-step controller with overlap有重叠区的两位控制器
12.two-step action with overlap有重叠区的两位作用
13.The two pictures are made to lap over each other.那两张画被重叠在一起。
14.Multidisciplinary Design Optimization of Two-Stage-To-Orbit Reusable Launch Vehicle;两级重复使用运载器的多学科优化设计
15.a French verse form of 10 or 13 lines running on two rhymes; the opening phrase is repeated as the refrain of the second and third stanzas.十行或十三行诗压两个韵的法语韵体；开头的措辞在第二和第三小节中被重复构成叠句。
16.The Design Features of Round Iamination Point in D89 Iron Core Two Rows Progressive DieD89铁芯双列级进模圆形叠铆点的叠铆设计
17."and two folding doors of cypress-wood, with two leaves."用松木作门两扇。这扇分两扇，是摺叠的。那扇分两扇。也是摺叠的。
18.[bbe] And two folding doors of cypress-wood, with two leaves.用松木作门两扇、这扇分两扇、是摺叠的、那扇分两扇、也是摺叠的。
相关短句/例句
two-stage cascade refrigeration两级复叠制冷
1.Thermodynamic properties of R23/R13 were compared with the alternative refrigerants of R404A/R23,and a number of issues in the design oftwo-stage cascade refrigeration system using alternative refrigerants were discussed.对应用于两级复叠制冷的工质对R22/R13及其替代物R404A/R23的基本物性参数进行了分析对比,针对采用替代制冷剂后制冷系统在设计中需要注意的一些问题进行了探讨。
3)two-stage folding两级折叠
1.In order to improve the speed,distributed T/H andtwo-stage folding are used.为了提高电路速度,使用分布式采样保持电路处理输入信号,两级折叠电路提高电路的增益和带宽。
4)Two-tier replication两级复制
5)Two-level multiplexing两级复用
6)two-stage size-reduction,two-step contraction,two-step reduction两级缩小<复>
延伸阅读
复制叉式复制大肠杆菌等原核生物的环状染色体dna复制时，首先在dna的复制起点上解螺旋。dnab蛋白结合在复制起点处两个解旋了的单链上，分别形成两个前导链(leading strand)的引物(primer)，当前导链朝正反两个方向同时延伸时，dnab蛋白朝延伸方向作逆向移动，陆续形成后随链(laggingstrand)的引物。这是dna双向复制的方式。在复制启动时，尚未解开螺旋的亲代双链dna同新合成的两条子代双链dna的交界处，就称为复制叉(replication fork)。两个靠得很近的复制叉之间形成的空间称为“复制泡”(replication bubblo)。真核生物线状双链dna分子复制时也是先形成复制叉，只是复制起点不止一个。复制开始时，dna解旋酶把dna双链分子解开成两股单链，形成了y形的复制叉。复制叉是不对称的，即一条子链是连续合成的，这是前导链，其合成稍稍领先于另一条不连续合成的后随链。由于dna子链的合成是从5，端到3’端方向进行的，所以前导链只需在复制起点上有一个引物，一旦形成复制叉后，dna聚合酶就可沿着亲链模板不断地加上新的核苷酸，从而合成一条新的连续的子链。同样道理，由于dna子链的合成是从5，朝3，方向进行，所以一定要等前导链开始合成而将后随链的合成模板暴露出来以后，后随链的合成才得以进行。此时，先由dna引物酶合成与后随链亲链的碱基互补的、长约10个核苷酸的rna引物，在dna聚合酶作用下沿着后随链模板合成dna，一直延伸到前一个dna片段5’端上rna引物为止。这样合成的是一系列不连续的长约200个核苷酸的片段，这被称为冈崎片段(okazaki fragment)。专一识别dna/rna双链体中的rna链的dna修复酶，切除rna引物，代之以由dna聚合酶合成的dna小片段。最后由dna连接酶把冈崎片段连接成一条连续的dna单链。
