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第二道!紧急A block of mass m = 2.0 kg is held in equilibrium on an incline of angle θ = 60° by the horizontal force FDetermine the normal force exerted by the incline on the block
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一个m=2.0kg的物块放在一个60度倾角的斜面上,受到一个水平力F的作用而处于平衡状态,求斜面对物块施加的力.物块受到3个力的作用,重力G,水平力F和斜面的力F1,三个力的合力为零,则mg=F1*cos60° （竖直方向）F=F1*sin60°解得 F1=mg/cos60°=39.2N
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中文回答20N物体沿斜面方向上受力平衡 把重力和水平力F在斜面分别分解
20kg的物体放在60度斜面上受水平力F作用决定物体运动的最小力
质量为20kg的砖块放在60度斜面上,加一水平力F,达到平衡状态,让你确定斜面对砖块的作用力很详细吧,求你了,我没分了!!!!!
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Analysis and Compensationof Numerica Dispersion in the FDTD Method for Layered Anisotropic Media（数值分散在层状各向异性介质的FDTD方法中的分析与补偿）.pdf 11页
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Analysis and Compensationof Numerica Dispersion in the FDTD Method for Layered Anisotropic Media（数值分散在层状各向异性介质的FDTD方法中的分析与补偿）
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IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 50, NO. 9, SEPTEMBER 2002
Analysis and Compensation of Numerical Dispersion
in the FDTD Method for Layered, Anisotropic Media
C. D. Moss, Fernando L. Teixeira, Member, IEEE, and Jin Au Kong, Fellow, IEEE
Abstract—In this work, we investigate the effects of numerical
As an interesting example of the application of such analysis,
dispersion in the finite-difference time-domain (FDTD) algorithm
we derive the exact implementation of Huygens’ sources in the
for layered, anisotropic media. We first derive numerical disper-
FDTD lattice that compensate the numerical dispersion effects
sion relations for diagonally anisotropic media (corresponding to
an FDTD reference frame coinciding with the principal axes of a bi-
of complex media. Usually, Huygens’ sources are used to in-
axial media). In addition, we incorporate the discretization effects
troduce and remove a field excitation from the FDTD compu-
on the reflection and transmission coefficients in layered media.
tational domain using the analytical expression for the incident
We then apply this analysis to minimize the numerical dispersion
field. Classically, this method does not account for the numer-
error of Huygens’ plane-wave sources in layered, uniaxial media.
ical dispersion of the incident field, and small errors are intro-
For usual discretization sizes, a typical reduction of the scattered
field error on the order of 30 dB is demonstrated.
duced into the simulation. Work has been done on dispersion
compensated Huygens’ sources, considering one dimensional
Terms—Buried
detection,
finite-difference
(1-D) phase velocity a
正在加载中，请稍后...您要找的是不是:
方向角；坐标方位角
distortion angle
机械英汉词典（D） ... distortion || 失真，畸变，扭曲，翘曲(轧材断面的) distortion angle || 侧偏角 distortion of waveform || 波形畸变，波形失真 ...
基于40个网页-
关于数学的专业英语（4）-中国最大的学术博客平台-... ... distortion 畸变 distortion angle 畸变角 distortion theorem 畸变定理 ...
基于39个网页-
其中θ是失真角（distortion angle），若IRMS total的谐波成分趋近零，则K 1。因此我们可做个结论P.F.
基于8个网页-
微角度变形
角变位移法
碰撞角度扭曲
畸变角扭转角
键角微区畸变均方值
更多收起网络短语
&2,447,543篇论文数据，部分数据来源于
In addition, the effect of the proposed scheme would not decrease with the increase of the rotation and distortion angle.
且指纹提取效果并不因旋转角度的增大而降低，也不因扭曲角度的增大而有明显降低。
Specification and span can be set. Touch screen displays test time, distortion angle and etc on real time. And printer can print the testing data.
可设定规格、跨距，在触控屏上实时显示实测挠度、试验时间、受力弯曲角度、变形角度，并可由打印机打印出测试数据。
With the way to solve the distortion effect problem by the flexible foundation method, the distortion stress was calculated after solving the cross-section distortion angle.
分析畸变效应时采用了弹性地基梁法的求解思路，在求出截面畸变角后，计算畸变应力。
This eliminates distortion and provides the best viewing angle whether standing, sitting, or even lying down.
Furthermore, we have achieved a wide horizontal viewing angle of 45 degrees by incorporating an optical lens that thoroughly suppresses unwanted elements such as aberration and distortion.
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