查询词典 square wave

The governing equation is the mild-slope equation. Finite element method has advantage to treat complicated boundary. The second order radiation boundary condition is expanded to improve the wave model for large incident wave angles. The validity of the second order radiation condition is examined through varying arbitrary wave incident angles.

模式将以包含波浪绕射及反射之缓坡方程式建立数值模式，利用有限元素法易於处理不规则边界的优点，引用二阶近似辐射边界条件，扩展波场模式处理大角度波浪入射的能力，探讨在未碎波的情形下，二阶辐射边界条件对於任意角度波浪入射之适用情形。

By using the second order Stokes wave theory,the wave force is calculated and the method to deduce the formula of the second order Stokes wave force spectrum is explored.

本文基于二阶Stokes非线性波浪理论探讨了采用非线性波浪理论时随机波浪力谱的计算方法，并用一典型算例，对本文公式的计算结果与线性波理论的计算结果进行比较。

By using the second order Stokes wave theory, the wave force is calculated and the method to deduce the formula of the second order Stokes wave force spectrum is explored. A representative example is given and the results horn calculation are obtained in the form of curves for comparison.

本文基于二阶7Stokes非线性波浪理论探讨了采用非线性波浪理论时随机波浪力谱的计算方法，并用一典型算例，对本文公式的计算结果与线性波理论的计算结果进行比较。

Functional T wave change accounted for 99.24%(519/523).Among which, 144 cases of T wave change were self-restoring when physiological inducements were removed.14 with T wave normal variant and 195 with negative treadmill exercise tests, and 166 with positive propranolol tests.

T波改变判为功能性占99.24%(519/523)，其中去除生理诱因T波自行恢复144例，T波正常变异14例，平板运动试验阴性195例，普萘洛尔试验阳性166例。

With the shadowgraph method, three ultrasonic pulses in water, which corresponds to the conversion modesof the fast compressional wave the transverse wave and the slow compressional wave in the sample of fluid-saturatedporous medium respectively, were observed and recorded by CCD camera.

用阴影法和CCD照相，观测到声脉冲透过流体饱和孔隙介质（按英文"Fluidsaturatedporousmedum"的第一个字母缩写为FSPM）样品后在水中传播的三个声脉冲，这三个声脉冲分别对应于FSPM样品中的三种体波的转换模式。

This paper analyzes the action of air shock wave and compressive wave in oil to the basement structure, and confirms the shock wave shape and each parameter.

考虑到这种情况以及世界范围内的人防工程建设的平战结合趋势，我国制定了"长期坚持、平战结合、全面规划、突出重点"的人防工程建设方针。

The other function is to wave, sine wave and triangular wave statistical analysis.

功能是对方波，正弦波和三角波进行统计分析。

Power should be sinusoidal wave form, the fundamental wave does not exceed 5% of harmonic wave.

电源的波形应为正弦波，谐波分量不超过基波的5%。

Results show that amplitude of displacement excited by vertical incidence wave is larger than that excited by inclined incidence wave and not influenced greatly by the incidence angle. In vertical incidence, amplitudes of displacement of two points at the same altitude along each cavern are basically identical and maximum relative displacement occurs between top and bottom point of the cavern. While in the case of inclined incidence, displacement amplitude on sides meeting the wave is larger than that on leed sides, and maximum relative displacement occurs on left skewback and bottom of the cavern.

结果表明，位移幅值受入射角度的影响不敏感，竖直入射比斜入射情况要大；竖直入射时，各洞室两侧同一高程处的位移幅值基本相同，相对位移差最大部位为洞顶与洞底，而斜入射时迎波面比背波面一侧位移大，且相对位移差最大部位为洞室迎波面的左拱座与洞底。

The stealth warplane for the microwave radar usually have complicated structures with the coating of wave absorption. On the base of calculation and modeling of the geometrical structure of the warplane in real size, the HF RCS of the air crafts under two different polarizations in different direction have been calculated with the FDTD. The result shows that the above mentioned stealth warplane have the obvious characterstics of frequency resonance, polarization and the relatively large RCS in HF Band 10-30dBm2, which can be used as the theoretical reference for selection of working frequency for sky wave OTH Radar and it also means that the sky wave OTH radar has good capability of anti-stealth targets quantitatively.

对微波雷达具有隐身作用的飞机，其形体较为复杂且表面涂敷有强吸波材料在对一种具有隐身几何外形结构实际尺寸飞机进行计算建模的基础上，文中采用FDTD技术得到了两种极化状态下该飞机无涂敷时不同方向上的短波雷达截面RCS值其结果显示了这种隐身几何外形飞机在短波波段有明显的频率谐振特性、极化特性和较大的RCS10-30dBm2，可为天波超视距雷达在选择工作频率时提供理论参考，并定量地说明天波超视距雷达具有较优的反隐身目标能力

This was not understood at the time, and therefore went unaddressed, until ascension became so distorted that we chose to stop ascending and wait for a time when all records would be revealed.

这在当时没有被了解，因此进行着无改编，直到提升变得如此扭曲，我们选择去停止提升并等待所有记录能被揭示的那一天。

The attack＇s nuisance value is increased because mobile phone networks also send notifications of new voicemail by sms,so an attacked phone may stop advising of new voice messages too,it warned.

它警告：这种攻击的危害增长是因为移动电话网络也会通过短信发送新语音邮件的通知。所以受到攻击的手机可也以停止新的语音信息的提示。