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The nature of the acceleration unit-impulse response function of unbounded medium tending to vary linearly is proved by means of asymptotic analysis. Thus, the acceleration unit-impulse response function can be regarded as the summation of a linear function and a residual part which converges to zero. Based on this decomposition, two FE-SBFE coupling procedures are presented based on system realization and truncation integral technique respectively.

本文系统研究了相互作用力-运动关系的位移表达、速度表达和加速度表达,通过比较位移、速度和加速度单位脉冲响应函数的SBFE求解过程,确定采用相互作用力的加速度表达;通过渐近分析证明了无限地基加速度单位脉冲响应函数具有随时间延长而趋于线性变化的性质;利用这一性质将加速度单位脉冲响应函数分解为一个线性函数和一个衰减到零的残余函数的和,以此为起点发展出两种FE-SBFE时域耦合方法:基于系统实现的FE-SBFE时域耦合方法和基于截断卷积的FE-SBFE时域耦合方法。

The sterilization by the means of pulsed- light is a new method of unheated sterilization.

脉冲强光杀菌是一种新兴的冷杀菌技术,本文设计脉冲强光杀菌的发生电路,对其进行了初步的设计研究,使用双电源脉冲发生电路提供能量。

For example, in 90 nm devices, although most upper pages in multi-state memory element devices can be programmed within eighteen pulses, the maximum allowed number of pulses may be set at, e.g., twenty-four, to provide a margin of six pulses.

举例来说,在90nm装置中,尽管多状态存储器元件装置中的大多数上部页可在18个脉冲内编程,但最大允许脉冲数目可设定为例如24,以提供6个脉冲的裕限。

The study of spatial configuration and characteristics of pulsed-wire velocity probe shows that: the yaw-and pitch-response characteristics have a good behavior due to the asymmetrical arrangement of the prongs. Because the amplitude of sensor wire response signal changes with the flow velocity, the differentiated signal is selected to trigger a voltage comparator. The pulsing frequency is restricted to about 100Hz to allow the wire to cool between pulses. The first velocity probe with big acceptance cone has been developed in China, and the way of measuring the Reynolds normal and shear stress and application have been given in this dissertation.

脉冲热线空间速度探针的空间结构及特性的分析表明:三根长支架平行且安置于同一平面的探针结构可以获得大的测量角和好的测量性能;由于传感丝的响应信号幅值随流速变化较大,故应采用微分法进行信号处理;对于5μm的传感丝由于散热时间基本不变,约为10ms,故脉冲发射的最高频率为100Hz;本文在国内首次研制成功了一种大测量窗的脉冲热线空间速度探针,并给出了测量雷诺应力的方法和实例。

If the dust cleaning efficiency is known, the geometric parameters of the cleaning system, pulse-jet pressure, time and filtration area of a plenum box (or the diameter, length and numbers of the fiber) will be determined in the pulse-jet baghouse.

若预先确定要求达到的粉尘剥离率,可以通过清灰气流速度方程和剥离力方程确定脉冲清灰系统的几何参数、脉冲喷吹压力、脉冲喷吹时间和分室内的过滤面积(或滤袋直径、滤袋长度和滤袋数量等)。

Based on the model,the relationship between the main pulse frequency of supply power and the balanceable inter-electrode gap is discussed.

给出了脉冲电化学加工极间平衡间隙的数学模型,并据此讨论了高频群脉冲电化学加工中,电源主脉冲频率与平衡加工间隙的关系。

An activating electrode system with brushy nozzle-plate structure is placed prior to pulsed discharge electrode system to activate water vapor. The purpose is to produce more radicals in relation to H2O to increase DeSO2 efficiency in the process of DeSO2 by pulsed discharge.

脉冲放电电极系统前端添加一套由芒刺状尖嘴和板电极构成的活化电极系统,对水蒸气进行活化处理,使在脉冲放电脱硫过程中产生更多与水有关的自由基,从而提高脉冲放电脱硫效率。

Base frequency of the buncher is 6 MHz, it can be used in bunching light ion beams as p or D, as well as heavy ion beams up to Cs, with beam utilization efficiency of 50 %—60 %, and pulsed beam width of light ions less than 1 ns.

聚束器基频为6MHz,可以对质子、氘直至铯等所有离子束进行脉冲聚束,束流利用效率可达50%—60%,质子等轻离子脉冲束的脉冲时间宽度小于1ns。

Several methods were used to study the pulse shortening of CuBr laser and dye laser pumped by it experimently and theoretically in this paper.

本论文主要从实验及理论上运用若干方法对CuBr激光脉冲压缩及其泵浦染料激光脉冲压缩方面作了详细的分析研究,实验上均获得了接近Fourier变换极限脉冲输出。

objective:to approach the immunity status of pulse magnetic field treatment on treating paediatric lobular pneumonia.method:120 paediatric cases,suffering from lobular pneumonia by pulse magnetic field treatment,admitted by our department during the period of january 2008 and october 2008,designing observation group;120 cases,which were health check-up the same term,designing control group.observation group were picked blood 2ml before treatment and after treatment 4 weeks;control group was picked blood 2ml during health check-up.blood serum was separated and immunoglobulin was inspected by immunity nephelometry and immunity function were analyzed.results: iga igm igg value in 120 cases observation group was lower than of the control group and iga igm igg value was obviously heightener after treatment.the difference between the two cases was significant in statistics(p.05).conclusion: pulse magnetic field treatment on treating paediatric lobular pneumonia improve immunity function,boost up resistance of paediatric cases.

目的:探讨脉冲磁疗治疗小儿支气管肺炎前后体液免疫功能状况。方法:我科于2008年1月~2008年10月收治的部分支气管肺炎患儿采用脉冲磁疗治疗120例,设为观察组;同期门诊健康体检儿童120例,设为对照组,观察组于治疗前及治疗后4周分别采血2ml,对照组于体检时采血2ml,分离血清用免疫比浊法进行免疫球蛋白检测,并对治疗前后患儿的体液免疫功能进行分析研究。结果:120例观察组患儿治疗前iga igm igg值均低于正常对照组,且观察组治疗后iga igm igg值均较治疗前明显增高,且经统计学处理差异均有显著性(p.05)。结论:脉冲磁疗治疗小儿支气管肺炎改善了患儿的体液免疫功能,从根本上增强了抗病能力。

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