1) comprehensive compression ratio
综合压缩比
1.
The experiment shows that when the comprehensive compression ratio is set as 65,there is no obvious change between the compressed image and the original image to provid satisfactied.
实验表明,当综合压缩比设为65时,压缩图像与原图像相比并无明显变化,由此可见,压缩效果令人满意。
2) Comprehensive compaction-shrinkage modulus
综合压缩模量
4) Synthetical Chirp Radar
综合脉冲压缩雷达
1.
This paper provides a scientific method to interfere Synthetical Chirp Radar by using DRFM technique, and designs a system of DRFM by using 3 bit phase quantization.
提出了应用数字储频技术对综合脉冲压缩雷达进行干扰的理论,并设计了一种3bit相位量化DRFM系统。
5) composition coefficient of pile shaft compression
桩身压缩综合系数
1.
Based on tests and numerical simulation data of overlength cast-in-place piles,the composition coefficient of pile shaft compression is obtained through back analysis;and a study on curve characteristics between composition coefficient and other parameters,the influence factors of composition coefficient,and the forecast of composition coefficient is carried out.
977 6,可为该场地及类似场地桩的桩身压缩综合系数的预测和计算提供参考。
6) compression ratio
压缩比
1.
Study of DME HCCI Engine Emission Characteristic with Different Compression Ratios;
变压缩比二甲醚均质充量压燃发动机排放特性的研究
2.
Investigation of geometric theory of double-arc modication of scroll compressor and its compression ratio;
涡旋压缩机双圆弧修正的几何理论和压缩比研究
3.
Study on the Compression Ratio Optimization of a LPG-Diesel Dual Fuel Engine;
LPG/柴油双燃料发动机压缩比优化研究
补充资料:动力机械:压缩比
内燃机气缸最大容积与压缩容积的比值﹐是内燃机的重要结构参数(见图 压缩比定义 )。活塞处于下止点时气缸有最大容积﹐用Vα表示﹔活塞处于上止点时气缸内的容积称为压缩容积﹐用Vc 表示。内燃机的压缩比ε 为
ε=气缸压缩容积+气缸工作容积/气缸压缩容积=Vc+Vh/Vc=Vα/Vc
ε为几何压缩比﹐它表示活塞从下止点移动到上止点时气缸内气体被压缩的程度。活塞位于下止点时进气门或进﹑排气口尚未关闭﹐故有时须用有效压缩比ε0的概念。 ε0指内燃机进﹑排气门(口)开始全部关闭瞬时的气缸容积与气缸压缩容积之比。凡未经特别指明的压缩比均指几何压缩比。压缩比对内燃机性能有多方面的影响。压缩比越高﹐热效率越高﹐但随压缩比的增高﹐热效率增长幅度越来越小。压缩比增高使压缩压力﹑最高燃烧压力均升高﹐故使内燃机机械效率下降。汽油机压缩比过高容易产生爆震。柴油机压缩比过低会使压缩终点温度变低﹐影响冷起动性能。压缩比能使内燃机排气中有害成分(如NOX﹑烃类﹑CO等)的含量发生变化。现代柴油机的压缩比一般在12~22之间﹐但超高增压柴油机的压缩比可低至8。现代汽油机压缩比为6~10。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条