本文主要研究了大高径比ZA27合金铸件挤压铸造过程的若干基本问题。
The fundamental problems of ZA27 alloy squeeze casting with high ratio of height to thickness were studied in this paper.
最后，以高脚杯形挤压铸件作为大高径比挤压铸件的实例，对其挤压铸造过程中的温度场和应力场进行了模拟和分析。
At last, as the example of squeeze casting with large ratio of height to diameter, the temperature field and stress field of high-leg casting were simulated and analyzed.
大高径比挤压铸件成形时的一个显著特征是压力沿着轴向分布严重不均。
The distinct characteristic of squeeze casting with larger ratio of height to diameter is (heterogenous) distribution of squeeze pressure.
最后介绍了高径厚比石英窗口的数控抛光实验过程和结果。
The process and result of fabrication high diameter to thick ratiofused silica window has been introduced.
切根苗的高径比与冠根比均在壮苗的适宜范围内，须根数量多，菌根感染率高，均明显优于未切根的普通大田亩，这将有效地提高造林质量。
Ratio of height and diameter, crown and root, of root cutting seedling were strong with more fibrous root, and higher rate of fungus root infection than untreated normal field seedlings.
高径比（H/D）较大的塔在风载荷的作用下，在塔顶处会引起一定的静挠度。
There appears some flexibility at the top of tower with high ratio of height to diameter (H/D), caused by wind load.
云母作为功能材料或填料都需要高纯度、细的粒度和窄的粒度分布、高白度和高径厚比。
As a functional material or filling are need higher content brightness narrowly particle size distribution and radius-thickness ratio.
高径比、酸度、还原糖、水分、重量、乳酸菌和酵母菌是馒头加工过程中主要的理化和微生物变化指标。
The ratio of height to diameter, ph value, reducing sugar, moisture, weight, lactobacillus, microzyme are primary physicochemical and microbial index during the process of steamed bread.
实验结果表明，高径厚比改性绢云母增强尼龙6的力学性能有显著的提高。
As shown by experimental results, the capacity of modified sericite with higher diameter thickness ratio in strengthening nylon 6 is improved significantly.
本文利用大型有限元模拟软件ANSYS对大高径比柱形挤压铸件的温度场和应力场进行了数值模拟。
In this article, the large FEM software, ANSYS, was employed to simulate the temperature field and the pressure field.
研究结果表明：采用分层浇注-累积液锻成形大高径比制件的方法是完全可行的；
The results show that it is feasible to apply the method of laminated pouring and accumulated liquid forging into forming components with large ratio of altitude and diameter.
铸件的凝固特性和组织直接影响铸件的力学性能，用计算机模拟和试验的方法研究了大高径比挤压铸件的凝固特性和凝固组织。
Solidification characteristics and microstructure of squeezing castings with large ratio of height to diameter have been investigated by numerical simulation and experiments.
对影响该工艺的主要因素，如吸附剂、空塔线速度、高径比、再生方法和条件等进行了分析和讨论。
Main factors which made influence on the efficiency of drying process, such as sorbent, superficial linear velocity, aspect ratio, regeneration method and condition, were analyzed and discussed.
首次提出填料塔动持液量不是均匀分布的，高径比是影响动持液量的一个重要参数。
The authors put forward at first that operating holdup in packed column is not well-distributed and ratio of height to diameter is an important parameter which influences operating holdup.
地震时人工岛内回填土只有一部分有效质量参与地震响应，通过模型试验，高径比小于1/3的人工岛回填土有效质量系数在0.2左右。
Through model tests, it has been found that the effective mass coefficient for the soil is around 0.2 for artificial islands with height-to-diameter ratio being smaller than 1/3.
造林成活率和当年生长量与茎根比和高径比关系密切。
The survival rate and growth of the first year showed a close relation with shoot-root ratio and height-diameter ratio.
造林成活率和当年生长量与茎根比和高径比关系密切。
The survival rate and growth of the first year showed a close relation with shoot-root ratio and height-diameter ratio.
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