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The results show that, when the volume of the secondary room is 1/3 of that of the primary room,the sound energy decay in the primary room is greatly in- fluenced by the secondary room at an aperture size of less than 10% of the wall,that the energy decay curve and the coupling con- stant in the primary room gradually change with the aperture size,and that the effect of the secondary room on the acoustics in the primary room is uniform.

发现在耦合空间体积与主厅体积比为1/3的条件下,当耦合窗面积与隔墙面积比小于10%时,耦合空间对主厅的声能衰减有较大影响;主厅的声能衰减曲线和耦合常数随开口的改变而逐渐发生变化:耦合空间对主厅各点音质的影响比较均匀。华南理工大学物理科学与技术学院;华南理工大学物理科学与技术学院广东广州 510640;广东广州 510640

The effects of different temperature and initial gasses ratio in Si-rubberbag on celery storage were studied,quality parameters including weight loss rate,etiolation rate,decay rate,respiration rate,changes of the concentration of oxygen and carbon dioxide in Si-rubberbag,cell membrane permeability and coarse-fiber contents were mensurated.

研究了不同温度以及硅窗袋内不同初始气体浓度比例对芹菜贮藏效果的影响,测定了芹菜贮藏过程中失重率、黄化率、腐烂率、呼吸强度、袋内O2、CO2含量、细胞膜透性、粗纤维含量等指标的变化,结果表明:温度对芹菜贮藏效果影响显著,但15℃与5℃环境下芹菜贮藏效果相差不大。

The main work of this thesis is simulation study on the basis of large sample properties for two estimates by Monte Carlo method with some models. We consider the problem of the choice of window width, consistent rate and some doubtful points about consistent rate with fixed sample size.

本文的主要工作是依据大样本性质,对特定模型的这两种估计用Monte Carlo方法进行了模拟试验,讨论了长度有限的样本情况下窗宽的选择问题,比较了两种估计的拟合程度,相合速度并提出了对相合速度的一些疑难点。

This paper set out research from the vehicle problem with time windows. It brought forward the method in delivery route planning base on GIS. Then it explored the key technology in system integration. Prototype system was developed in the end.

本文将从带时间窗约束的车辆路径问题出发,结合GIS技术,研究基于GIS的配送路径规划的方法,并对GIS与物流配送系统集成的关键技术进行深入探讨,最后对集成系统的原型进行探讨。

This paper set out research from the vehicle problem with time windows. It brought forward the method in delivery route planning base on GIS. Then it explored the key technology in system integration.

本文将从带时间窗约束的车辆路径问题出发,结合GIS技术,研究基于GIS的配送路径规划的方法,并对GIS与物流配送系统集成的关键技术进行深入探讨,最后对集成系统的原型进行探讨。

In consideration of the complex properties of the carbonate reservoirs in West Hubei and East Chongqing,their gas potential examination was carried out by use of the method of combining the target zone's small time window AVO analysis and AVO comprehensive response calibration with the intersection chart and AVO attribution contrasting analyses.

文章针对鄂西、渝东的碳酸盐岩储层复杂的特点,应用沿目的层的小时窗 AVO分析、AVO综合响应标定及交绘图分析、AVO属性对比分析相结合的方法来对该地区的碳酸盐岩储层含气性进行了检测,实例证明该AVO综合分析方法对碳酸盐岩储层中的油气检测是行之有效的

She crossed the quadrangle and looked back--looked back for a moment at the fire-light gleaming through the rosy-tinted curtains in her boudoir, and the dim gleam of the lamp behind the mullioned windows in the room where Sir Michael Audley lay asleep.

她穿过了四方院子,她回头看望——对她闺房里透过玫瑰红窗帘闪耀出来的炉火的光芒,对迈克尔·奥德利爵士躺在那儿睡觉的房间里直棂窗背后暗淡的灯光,回头看望了片刻。

In the heredity community renewal process, the paper uses one kind of new crossover operator——Improvement Order Crossover, the better solution two difficult problems both has been able to maintain the fine characteristic of father generation, does not destroy the sub-way which produces already in the most superior routing, and can guarantee when participation in the crossover two individual body is same, causes the genetic algorithms not to be able precociously to restrain in the partial optimal solution.

在应用遗传算法求解时,提出采用惩罚策略处理目标函数中对车辆容量的限制和客户对不同时间窗的需求约束,从而使目标解所对应的染色体能够根据违反约束的程度,具有不同大小的适应度;在遗传群体更新过程中,本文采用一种新型的交叉算子——改进的顺序交叉,更好的解决了既不破坏父代染色体中已产生的最优子路径,还能保证当参与交叉的两个个体相同时,遗传算法不会早熟收敛于局部最优解的两个难题。

For the research interest,the paper has studied the influence of such factors on the smoke movement,as the height of spandrel,the width of horizontal projection,the width of heat passage,the breaking of external wall,as well as the wind speed,etc.

分析发现,增设防火挑檐、加宽幕墙热通道可降低烟气对上层幕墙的影响,而在0.8m高的基础上再增加窗槛墙高度并不能起到更好的防火效果;外幕墙破碎后,可将大部分烟气排出到外界空间,对上层幕墙的影响会减弱;室外风速会加速烟气的蔓延,但可降低烟气温度。

In this paper, total logistics amounts are chosen as evaluation index, and artificial time series are designed to solve the shortness of statistical data in Chinese logistics. Spectrum estimation theory depicts time characteristics in frequency domain thus has such benefit than time domain methods. This paper evaluates the period of Chinese logistics using spectrum estimation. Stationarity of artificial series is verified, parameter sensitivity of truncation point is analyzed, six periods with different delay window are compared, and significance of period evaluated is tested.

中国物流统计数据缺乏,客观上限制了对其周期规律的研究,本文选取社会物流总额作为测度指标,设计了一种人工序列,解决了统计数据过短问题;谱估计法从频域角度揭示客观事物的时间特性,在研究时间序列周期波动方面具有时域分析法所不具备的优势,作者采用谱估计法对中国物流发展周期进行测定,检验了指标序列平稳性,分析了截断点参数灵敏度,比较了6种不同滞后窗下周期值,并检验了所测得周期的显著性。

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推荐网络例句

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm~150rpm时取得最大值,此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世,形体几无变化。

When I was in school, the rabbi explained everythingin the Bible two different ways.

当我上学的时候,老师解释《圣经》用两种不同的方法。