2) Reactive Muffler
抗性消声器
1.
Acoustic Performance Analysis of Reactive Muffler Based on FEM;
基于有限元法的抗性消声器声学性能分析
2.
Acoustic transmission matrix of reactive muffler containing units made of perforated pipe;
抗性消声器中含穿孔管时的声传递矩阵
3.
Finite Element Analysis of Acoustic Performance of Reactive Muffler;
抗性消声器声学性能的有限元分析
3) resistance muffler
抗性消声器
1.
A resistance muffler of digging machine was studied to reduce the pressure loss and optimize the structures according to the three main performances of muffler including insert loss, pressure loss and physical dimensions.
结合插入损失、压力损失和结构尺寸等影响抗性消声器产品质量的因素,利用三维计算流体力学仿真方法分析了某型号挖掘机消声器内部的压强分布,研究了造成压力损失过大的原因,对消声器的压力损失进行了预测,提出根据整机设计要求对消声器进行结构优化的设计流程,应用到实际抗性消声器的性能改进实践中。
2.
A complicated resistance muffler of construction ma-chinery is studied with the procedure of modeling,simulation and data processing.
本文通过复杂结构抗性消声器流体动力学建模、仿真和数据后处理等过程,讨论了利用计算流体力学方法计算消声器的压力损失方法,分析了消声器内部的结构对消声性能和压力损失的影响。
4) impedance silencer
阻抗消声器
5) acoustic attenuation performance
消声性能
1.
Numerical analysis of the effect of structural parameters on the acoustic attenuation performance of straight-through perforated tube silencers
结构参数对直通穿孔管消声器消声性能影响的数值分析
2.
A one-dimensional analytical approach and a three-dimensional substructure boundary element approach are developed to predict and analyze the acoustic attenuation performance of perforated tube dissipative silencers,as well as examining the effect of nonplanar waves in the silencers in the acoustic attenuation characteristics.
一维解析法和三维子结构边界元法被用于计算和分析穿孔管阻性消声器的消声性能,以及考查消声器内非平面波对消声特性的影响。
3.
<Abstrcat>A one_dimensional analytical approach and a three_dimensional substructure boundary element method (BEM) are developed to predict the acoustic attenuation performance of straight_through perforated tube silencers.
一维解析法和三维子结构边界元法被用于预测直通穿孔管消声器的消声性能。
6) resistance noise reduction
阻性消声
1.
The technology principle, construction and design calculation of resistance noise reduction for HD6 5 1 big power local ventilation fan developed recently are discussed in this paper.
介绍了新研制的HD6 5 1型大功率局部通风机成功降噪的阻性消声技术原理、结构和有关计算 ,并应用在通风机上进行实际检测 。
补充资料：茶树抗性育种
茶树抗性育种
resistance breeding of tea plant
茶树抗性育种(resistanee breeding(，ftea plant)一种以选育杭性强的茶树新品种为主要目标的育种方法，包括抗病、杭虫以及抗早、杭寒等不利于茶树正常生长的外界因子的抵抗能力。中l月北方茶区里季多低湿干旱，冬季多低沮严寒，这个地区的茶树选种不仅要求优质高产，还必须有较好的耐旱和抗寒能力:中国南方茶区气候沮吸很润，利于某些病虫发生.所以在南部茶区必须l视茶树抗病和杭虫能力的育种。无沦南北茶区，都要咬视免疫品种的选育。 茶树抗性育种要从以下几个方面扮手:声“‘泛搜集国内外的抗源品种和野生种，建立抗病虫的种质库.利用现代化的人工气候，加速进行病虫人工诱发和鉴定:寻求茶树本身能抑制病虫生长的化学物质，并加以棋拟仿制;研究人工免疫和人造抗病性的技术等。但杭性与某些经济性状间存在着连锁关系.在育种目标日益全面要求下.在利用新类型亲本和新抗源时，必须密切注意它们带来的不良性状.打破抗性与不良性状的连锁.才能获得理想的结果。以西维时)
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