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- The sound absorption coefficient of three kinds OSB wallboard were tested by the stationary wave method. 采用驻波管法测定了3种定向结构板(OSB)复合墙体的吸声系数；
- Prospecting metal mine goafs by Rayleigh wave method is introduced. 介绍用瑞雷波法检测金属矿山采空区。
- The graphic record shows three waves arriving one after the other at short intervals. 图形记录便显示了在短的间隙内先后到达的三种波。
- Based on the local characteristics of signals, a local wave method (LWM) can be employed to obtain the instantaneous frequency of signals and the Hilbert time frequency spectrum composed of an energy time frequency three dimensional distribution. 局域波法是基于信号局部特征 ,通过该方法可得到信号的瞬时频率和构成能量 -时间 -频率三维分布的Hil bert时频谱。
- In the subsequent section, I test the proposed hypotheses empirically, using three wave of the General Social Surveys. 在后来的区段中，我以经验为主地测试被计画的假定,使用一般的社会调查的三个波。
- Study of Phase Matching of Three Wave Noncollinear Interactions Optical Parametric Process[J]. 引用该论文 刘红军;陈国夫;赵卫;王屹山;王涛;赵尚弘.
- Minimum Detective Height and Height Measurement Accuracy Use Diffraction Wave Method to Detect a Crack Height. 衍射波法测定裂纹高度时的最小可测高度和高度测试精度。
- A M - band CMFB with a side lobe of about 45 dB was designed using the optimum equal wave method. 通过分析M带滤波器组和M带复用转换器的完全重构条件;用最优等波纹法设计了一个旁瓣约为45 dB的M带余弦调制滤波器组.
- With plane wave method,it is proved that the 1D-USPC shares the same bandgap character. 利用平面波法证明了一维超声光子晶体具有一般一维周期层叠结构光子晶体的禁带特征。
- Three winters and springs make three waves, one wave surging after another, and in between there should be an interval. 三个冬春就是三个浪潮,一波未平一波又起,中间要歇一歇。
- The theoretical response correlates well with dynamic testing of an engineering pil e by the reflective wave method. 理论计算响应与工程桩的反射波法动测结果有较好的相关性。
- The results indicate that this method not only can match completely group velocities among three waves, but also can achieve maximal parametric bandwidth for continuous tunable femtosecond BBO OPA. 结果表明,利用该方法不仅能够完全补偿飞秒BBO光参量放大在连续调谐时三波的群速失配,而且能够实现最大的参量带宽。
- The bandgap structure of one-dimensional photonic crystal was calculated and derived with the plane wave method(PWM). 用平面波法研究了椭圆钢柱与环氧树脂组成的三维简立方晶格声子晶体的带隙结构。
- A new method of analyzing three waves interaction in nonlinear periodically poled crystals (PP-crystals) on the theorem of quasi-phase-matching, called the vector superposing method is presented. 摘要从准相位匹配的基本原理出发，提出了一种研究周期极化介质中二阶非线性的三波互作用现象的分析方法-矢量叠加法。
- Incorporating quality detection of highway engineering,the principles of Rayleigh wave method are discussed. 结合道路工程路基施工质量检测,介绍了瑞利波测试技术的方法和原理。
- The result showed that surface wave method can find out concrete s flaws,in case its parameters are correctly chosen. 结果表明:只要参数选取合理,面波法能够探测出混凝土缺陷,并且效果明显。
- Using seismic image method and low-strain reflected wave method, the paper evaluates the quality of pile daises. 该文介绍了用地震映象和低应变反射综合检测桩承台,评价桩承台质量的方法。
- The plot centred around blowing up nine fully loaded aircraft, three planes in three waves, with the attacks occurring over separate days. 这项阴谋的主要目标是炸毁九架载满乘客的飞机;攻击时间将发生在不同的日期;分成三个波段进行;而每个波段炸毁三架飞机.
- Adopts step wave method to measure the timeaverage sound level(equivalent continuous sound level) of the sound level meter. 采用阶梯波法;测试了声级计的时间平均声级;即等效连续声级Leq功能;并对实测值和理论值进行比较.
- The He 2+ +H Impact Ionization process is investigated using a continuum distorted wave method with the eikonal initial_state(CDW_EIS) approximation. 利用初态程函近似的连续扭曲波方法研究了He2+离子与H原子的碰撞电离过程.
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
