均匀系数；均匀度
Obtained numerical simulation results of flow fields include the pressure drop and the non-uniformity coefficient on the outlet.
计算了整个排气蜗壳流场分布状况，从而能够获得排气蜗壳压力损失和出口段的速度不均匀度。
In order to evaluate the foamed aluminum structure, the uniformity coefficient (K) and its expression have been given according to the relative variance.
根据相对方差理论，提出泡沫铝孔径均匀度系数K的概念和其表达式，以评价泡沫铝结构特性和发泡效果。
Overlapped sprinkler water distributions were tested to determine the relationship between Distribution Uniformity ( DU ) and Christiansen Uniformity Coefficient ( CU ).
利用多喷头组合喷洒试验研究了分布均匀系数DU 与喷灌均匀系数CU 之间的关系。
In the second part of the thesis, an experimental study on the effect of embedded depth on the uniformity coefficient of irrigation and the distribution of soil moisture was made.
第二部分对渗灌管埋深对灌水均匀度和土壤水分分布的影响进行了试验研究。
Working pressure, with a small infection on stepping angle, positively influences wetted diameter , uniformity coefficient and stepping frequency.
工作压力影响射程、均匀系数和步进频率，对步进角度影响不大；
Field experiments were conducted to observe winter wheat response to nonuniform sprinkler irrigation under various Christiansen uniformity coefficient (CU) levels ranging from 62% to 82%.
利用田间试验研究了不同喷灌均匀系数条件下的冬小麦耗水规律及喷灌蒸发漂移损失。
Changes of sidewall sweep angle and cowl position can influence inlet performance such as mass capture, total pressure recovery coefficient and uniformity of isolator exit flow field.
侧板后掠角大小和整流罩位置变化时，对进气道的质量捕获、总压恢复系数和隔离段出口流场的均匀性等都有一定的影响。
Reuse of sheared sand material may produce large error in SS strength for sands with high coefficient of uniformity (Cu ).
对于高均匀系数砂土 ，重复使用砂样进行剪切试验可能会导致较大的试验误差 ；
In the situation of that coefficient of uniformity is bigger than 5, modulus of resilience reduces before it increases as coefficient of uniformity increase;
在不均匀系数大于5的情况下，回弹模量随不均匀系数的增大，先减小后增大；
In the situation of that coefficient of uniformity is bigger than 5, degree of compaction reduces before it increases as coefficient of uniformity increase;
不均匀系数在大于5的情况下，压实度随不均匀系数的增大，先减小后增大；
With the increasing of directional backcrossing generationstransferred, variation coefficient and uniformity degree of different hybrid groupsdecreasing.
结果表明，随着定向回交世代的增多，杂交种群体内的变异幅度减小，群体整齐性逐渐提高。
In the meanwhile, it puts forward to correct the calculation by hydraulic coefficient of non-uniformity and achieves reasonable results.
同时，提出了用水力不均匀系数来纠正这一现象，得到了合理的结果。
A method is introduced for testing stray light coefficient, vignetting coefficient and image surface uniformity optical system with large aperture and long focal length.
叙述一种用于测试大口径、长焦距光学系统杂光系数、渐晕系数、像面照度均匀性等光学参数的检测方法。
The dripper flow variation rate, flow deviation coefficient and the emission uniformity for the emitter are calculated by using computer program under the four conditions.
然后借助计算机模拟计算出上述三种因素独立作用及共同作用下流量偏差率、偏差系数、均匀度等指标；
The concept of uniform coefficient which could characterize the uniformity and continuity of the line and surface tactility was proposed.
提出均布系数的概念表征线面载荷的均匀性和连续性。
Premixing enzymes and calcium salt to manufacture bread additive, and its ash content was tested result in coefficient of variability. This coefficient could reflect mixed degree of uniformity o…
采用酶制剂与钙盐预混合配制面包添加剂，测定灰分含量，其变异系数能反映酶制剂混合均匀度。
Infrared lamp arrays have long been adopted as primary simulation equipment of thermal flux, considering the effect of cover coefficient of infrared heating cage on flux uniformity.
在以往的试验中，考虑到加热笼覆盖系数对热流密度均匀性的影响，通常选用红外灯阵作为主要的外热流模拟装置。
In this paper the static pressure uniformity in the static pressure chamber of supply air duct is stu***d by means of experiments, and its coefficient is derived.
对不同类型的空调静压送风系统进行了送风均匀性测试，测试结果表明，传统的空调静压送风道送风均匀性并不理想。
|homogeneity coefficient/evenness degree;均匀系数；均匀度
均匀系数（Uniformity Coefficient）是工程地质学与土力学中用于量化颗粒材料（如土壤、砂石）粒径分布均匀性的关键指标，其定义为颗粒分布曲线上累积百分比为60%的粒径（D60）与累积百分比为10%的粒径（D10）的比值，计算公式为：
$$
Cu = frac{D{60}}{D_{10}}
$$
该系数由美国工程师艾伦·哈赞（Allen Hazen）于1892年提出，主要用于评估土壤的渗透性和过滤性能。若均匀系数较低（接近1），表明颗粒尺寸分布均匀；若系数较高（如大于15），则说明粒径差异显著，可能含有粗细颗粒混杂的现象。
在工程实践中，均匀系数与曲率系数（Curvature Coefficient）结合使用，可进一步分析级配特性。例如，美国材料与试验协会（ASTM）在标准D2487中规定，砂土的均匀系数需满足特定范围以保证工程稳定性。此外，水利工程中常通过均匀系数筛选反滤层材料，以防止水土流失（参考《岩土工程手册》）。
研究显示，均匀系数与土壤的压缩性和抗剪强度存在相关性。例如，密歇根大学的研究指出，高均匀系数的砂土在动态荷载下易发生液化，需采取加固措施。这一参数也被国际土力学与基础工程学会（ISSMGE）列为土体分类的核心指标之一。
“uniformity coefficient”（均匀性系数）是用于衡量某系统或材料中分布均匀程度的指标，常见于工程和自然科学领域。以下为详细解释：
均匀性系数通常通过统计方法计算。例如在灌溉中，公式可能涉及测量点的水量差异：
$$
C_u = frac{text{平均水量}}{text{标准差}}
$$
（具体公式因场景而异，需参考实际标准。）
如需更专业的定义（如土壤颗粒分析中的均匀系数），建议查阅相关领域的权威文献。
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