封闭空间

封闭空间结构振动声耦合反馈力控制仿真结果表明：通过合理选择性能加权函数，噪声可以在指定频带得到良好的控制，最大噪声峰值近20dB（A）。

Simulation results for the structural acoustical coupling in enclosed space show that the structure-brone noise can be reduced effectively in assigned frequency band , the maximum control value for noise peak value is near 20 dB ( A ) .

封闭空间瓦斯爆炸与抑制机理的反应动力学模拟

Kinetic simulation of gas explosion and inhibition mechanism in enclosed space

封闭空间声学特性的有限元分析及CAD技术应用研究

FEM analyses of the enclosure acoustic characteristics and the research of CAD technology and Application

方法通过模拟气球在含多个物体的封闭空间内的膨胀，来实现Snake曲线的拓扑形变。

Methods The approach simulates the balloon inflating in a close space containing multi-objects to realize the topological change of the snake .

采用SIMPLE算法和RNGk-ε湍流模型，对平面射流倾斜冲击平板的半封闭空间内的流场进行了数值分析。

The SIMPLE algorithm and an RNG based k - ε turbulence model are used to numerically analyze the semi-confined flow field of a planar jet impinging obliquely on a flat plate .

本文对高宽比等于1的大尺寸封闭空间实验台用水作为对象进行了实验研究，获得了急需的高Ra数条件下封闭空间内换热的实验数据。

An experimental investigation has been carried out in a large size enclosure of aspect ratio equals to 1 . Much needed experimental data up to RaH of 3.61 × 1010 have been obtained .

本文对基于LMS算法的多通道Filtered-XLMS算法的思想作了介绍。指出此算法是封闭空间噪声主动控制的主要算法。

The concept has introduced in the paper based on Filtered-XLMS algorithm of LMS which pointed out that it is the main algorithm in closing space noise active control .

本文将以室内声场有源Helmholtz方程及其相应边界方程为基础，首先推导了求解小尺度封闭空间低频声传递函数的有限元模型。

In this paper , firstly , based on Helmholtz equation and its boundary equations , model of Finite Element Method ( FEM ) is given for computing low frequency sound transfer function in small enclosures .

大量的实验研究表明，一次空气是NOx生成的最主要影响因素，一次空气对于燃气在封闭空间内燃烧的NOx产生与在大气中燃烧的NOx产生有不同的影响。

The result of experiments indicates that primary aeration levl is main factor on emission of NOx , and that the relation between the primary aeration level and NOx emission is different in case of gas burning at closed chamber and open space .

封闭空间声场内的有源降噪（ANC）是现代噪声控制领域的研究热点，其中对结构声辐射声场的有源控制的研究更具有实际应用价值。

The active noise control ( ANC ) of enclosed sound field has long been an attractive task in the field of modern noise control , especially the active control of structure-borne noise has practical value .

该装置由气路管道系统、传感检测系统和智能控制等部分构成，不仅能够实现在局部封闭空间中模拟低浓度SO2污染的大气环境，并具有操作性强和可靠性高的优点。

This device consists of gas pipeline system , sensor detection systems and intelligent control system , then we can simulate low concentration of SO2 pollution in the micro-environment with the use of the device , and it has the maneuverability and high reliability properties .

11.在一个封闭空间比如Easy-Bake玩具烤炉里，一个100瓦的白炽灯泡可以达到华氏325度（约163摄氏度）的高温。

11.In the confined space of an Easy-Bake oven , a 100-watt bulb can create a temperature of 325 degrees Fahrenheit .

将遗传算法（GA）引入封闭空间自适应有源噪声控制（AANC）系统优化设计，以解决长期以来缺乏有效的确定封闭空间次级声源和误差传感器最优位置方法的问题。

For the lack of an effective method to determine the optimal arrangements of secondary sources and error sensors in the adaptive active noise control ( AANC ) system within the enclosure , Genetic Algorithm ( GA ) is firstly introduced into this problem .

Fenchel曾证明，封闭空间曲线的切线象的长不小于2π。

Fenchel proved that the length of the tangent spherical image of a closed space curve is at least 2 π . In this paper , we prove the following theorem .

莫里森公司（Morrisons）的物流与供应链主管尼尔？奥斯汀说：从技术上来看，我们担心货车的封闭空间很容易弄脏食物。

Neal Austin , Morrisons ' logistics and supply chain director , said : Technically , we would have a concern about the risk of contamination given the closed environment within the trailers .

通过实验研究了冲击雷诺数Rej、旋转雷诺数Reω、以及冲击孔的排列方式、冲击孔到靶板之间的距离等参数，对旋转条件下半封闭空间内多孔冲击平均换热特性的影响。

The effects of jet Reynolds number ( Rej ), rotation Reynolds number ( Re ω), the jet-holes array and the distance of jet-to-plate on multiple jets impingement cooling were studied by experiments .

试验用封闭空间墙体上的热通量是通过多块薄钢片（25.4mm×25.4mm×3mm）以及钢片周围隔热材料的温度推算出来的。

The heat fluxes on the wall of an experimental enclosure were deduced from the temperatures in several thermally thin small steel plates ( 25.4 mm × 25.4 mm × 3 mm ) and in the insulation surrounding the steel plates .

复杂封闭空间有源消声系统的建模新方法

New Modeling Method for Active Noise Control within an Irregular Enclosure

基于解析法的复杂封闭空间有源结构声控制

Active structure acoustic control within irregular enclosure based on analytical method

夹层封闭空间热盘管传热性能的研究

Research on heat transfer characteristics of heating tubes in enclosed air space

封闭空间中结构声辐射的有源力控制研究

Study on Active Forces Control of Structure borne Sound in Enclosed Space

封闭空间中的气体泄漏扩散仿真

Simulation of Release and Dispersion of Gas in Sealed Interspace

封闭空间声场的虚源法模拟研究

Simulation Research by the Image - source Method in Sound

复杂封闭空间结构声辐射的有源消声机制

Active control mechanism of structure-borne noise in an irregular enclosure

花儿好似长在封闭空间。

In this close room , nor missed the sun and showers .

封闭空间内单孔冲击局部换热特性研究

Investigation of Impingement Heat Transfer of Single Hole in a Limited Space

异性封闭空间的多孔介质自然对流计算

Calculation of natural convection in porous medium in a closed special-staged space

封闭空间脉冲响应场的计算机模拟方法综述

Review on Impulse Response Simulation of Acoustical Field in Enclosure

封闭空间有源噪声控制次级声源优化策略

Optimal strategy for the second source in enclosure under active noise control

计算小尺度封闭空间内低频声传递函数的自适应有限元方法研究

Research on Adaptive Finite Element for Calculating Sound Transfer Function in Small Enclosure