因此，对小孔直径、穿孔板厚度都有一定要求。
Therefore there are some demands set for the small hole diameter and thickness of the perforated plate.
试验表明，微穿孔板吸声结构可有效地降低排气噪声。
Results show that the acoustic system of micro perforation plate can effectively reduce discharge noise.
对穿孔板吸声结构的声学特性进行了理论分析与计算。
Theoretical analysis and calculation on the acoustic properties of perforated panel absorber were described herein.
以第一发明人获得一项有关微穿孔板方面的发明专利。
Obtain to concern small bore a hole with the first inventor board the invention of the respect is patent.
在领春木次生木质部中也观察到了端壁多穿孔板及侧壁穿孔板。
Multiple end wall and lateral-wall perforation plates were also observed in the secondary xylem.
本文对微穿孔板的非线性声阻抗率作理论与实验两方面的研究。
In this paper, the nonlinear acoustic impedance of the micro-perforated panel is investigated both theoretically and experimentally.
穿孔板使建筑结构一步步有层次的展现，也有助于改善建筑室内的空气质量。
This perforated panel gradually reveals the project's architecture, and ACTS to improve the overall indoor air quality for the building's occupants.
含笑属植物的导管分子大多具有梯状穿孔板，仅有一种可看到单穿孔板。
In contrast, most of the Michelia species possess scalariform perforation plates and only one with simple perforation.
一部黑色的楼梯蜿蜒通过狭窄的家，楼梯使用了白色涂层的金属穿孔板。
A black staircase that winds up through the narrow home was lined with white powder-coated metal guards that are perforated.
一个悬挂的钢结构桥体被用来连接上部空间，其穿孔板暗示了体量的轻盈。
A suspended steel bridge is used to link the upper Spaces, its perforated floor further hints at its lightness.
结果茵陈蒿具有梯纹、网纹和孔纹3种类型的导管，穿孔板类型为单穿孔。
Results There were 3 types of vessel elements, scalariform vessel, reticulated vessel and pitted vessel, the perforation plates were simple perforation plate.
在导管分子中，存在着梯状穿孔板、网状穿孔板、混合型穿孔板和单穿孔板；
The form of the perforation plates in the typical vessels are various, divide into several subtypes:scalariform perforation plates, reticulate perforation plates.
微穿孔板吸声结构以其众多的优点，在噪声控制领域得到越来越广泛的应用。
Microperforated panel absorbers are getting more and more widely use in noise control field for it's large advantage.
提出采用微穿孔板制作局部隔声罩用于降低NJI 043de汽车的噪声。
In this paper, a local sound insulation cover made of micro-perforated plate is used to reduce the noise of vehicle NJI043DE.
模型中还考虑了实际应用中经常遇到的小孔形状和穿孔板厚度两个重要因素。
The influences of the finite plate thickness and the orifice shape are also taken into account.
目的是了解微穿孔板在随机入射场或混响场内的吸声特性与垂直入射的关系。
The purpose is to compare and to find the relation of normal and random incidence.
本文的研究成果可为声学工程师及建筑师提供穿孔板吸声结构设计的参考资料。
In this paper, the results of research can provide the design reference of the perforated-panel absorbers for acoustic engineers and architects.
本文的研究结果可为声学工程师及建筑师提供穿孔板和吸声体设计的参考资料。
The results of this study can offer some perforation plate and acoustic absorbing body design reference materials for the acoustic engineers and architects.
综合无流、有流情况下穿孔板声阻抗的近似公式，给出穿孔元件声阻抗新模型。
Based on the numerical results, the curve-fitting expressions for the acoustic impedance of perforated plates with cross flow and grazing flow are obtained.
木莲属的所有种中都有具梯状穿孔板的导管分子，但在少数种中偶然可见到单穿孔。
Manglietia species all have scalariform perforation plates, only a few also have simple perforations.
这座花园是由一种钢结构框架支起的凉棚，通过穿孔板和厚重金属的视线畅通无阻。
The garden is framed by a structure of Corten steel, intended as a pergola. The pre-weathered metal gives the space an orange hue, visible on both the chunky beams and the perforated cladding panels.
根据观察结果，对导管分子穿孔板的演化及黄三七属植物的系统位置进行了分析。
The evolution of the perforation plates of the vessel elements and the systematic position of genus Souliea were discussed in the paper based on the present observation .
本文尝试利用有限元法通过计算机模拟来研究穿孔板吸声结构的模态频率和布置位置。
This paper attempts to use finite element method through computer simulation to study the absorption characteristics of the perforated-panel absorbers.
内部空间没有涂漆，暴露混凝土纹理。连结讲座馆的内墙是隔音墙，由贴面穿孔板做成。
Inner space is without paint and exposes a texture of concrete. Interior wall attached to the lecture pavilion is an acoustic wall and is made of veneered perforated sheet.
提出检测穿孔板静曲强度时，要以试件构成单元理论宽度的倍数作为试件宽度的计算依据。
When detection bending strength of perforation board, it is necessary to based times of theory width of modules on the width of modules.
研究表明：穿孔板的声阻与孔板厚度、孔径、穿孔数目、声波频率和气流速度等因素有关。
The experimental results show that acoustic resistance of perforated plate is related to plate thickness, aperture diameter, numbers of aperture, acoustic frequency and airflow velocity.
新建筑覆盖着不锈钢穿孔板，可以反射德克萨斯州白天的阳光，并且在夜间展现有趣的透明度。
The new building is wrapped in perforated stainless steel that reflects the hot Texas sun during the day and provides intriguing transparency at night.
第一层是由不锈钢构架体块和穿孔板组成的，它可以控制太阳光，减少热量并且创造有趣的视觉效果。
The first layer is a combination of stainless steel frame cubes and perforated panels, which controls the sun light, reduces heat and creates interesting visual effects.
文中给出计算及测量结果，并说明了影响微穿孔板吸声结构特性的因素，以及在实际应用中的注意点。
The results of calculation and measurement are presented, and some factors which affect the characteristics of MPA are given in the paper.
以某飞机座舱模型为研究对象，利用微穿孔板吸声结构成功实现了一套飞机座舱模型内部噪声无源控制系统。
Some experimental research work has been done on the passive noise control of the fighter cockpit, because of the larger noise generating under some circumstance.
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