高频

The system is found of head-up display, advanced APG-63 or APG-70 radar, inertial navigation system, flight instruments, ultrahigh frequency communications, tactical navigation system and instrument landing system.

能执行多种任务的电子系统也是F-15和其他战斗机的一个重要区别。F-15的电子系统由平视显示仪、APG-63(下图，或APG-70)火控雷达、惯性导航系统、飞行控制系统、高频无线电通信设备、战术导航系统、自动着陆系统组成。

A self-adaptation method to sample the unknown variables in the Green's function and in the generalized Sommerfeld integral in high frequency domain is proposed.

同时，还提出了对恒定电场中格林函数待定系数和高频下半无限大导电媒质中广义索末菲积分待定系数进行采样的自适应方法。

Firstly, Wavelet-Galerkin algorithm for solving the first kind of singular integral equation with the Hilbert kernel is proposed, we use the characteristic of periodic wavelet on L~2([0,1]) and Hilbert kernel to solve and make stiff matrix lower dimensions and become sparser through thresholding,thus the cost of computation is reduced. Because of the singularity of Hilbert kernel we use Tikhonov regularization method to solve the system of stiff equation. At last the convergence and numerical result of approximate solution are given. Secondly, an approach of regularization based on Fourier is presented for sideways heat equation; we give the theory proof and error estimate.

首先，提出了含Hilbert核的第一类奇异积分方程的小波伽辽金(Wavelet-Galerkin)数值算法，该算法中利用了L~2([0，1])上的周期小波和Hilbert核的特点进行处理，使得刚性矩阵维数降低并且通过阈值使得它更加稀疏，减少了计算量；由于Hilbert核的奇异性，通过Tikhonov正则化方法求解所得到的刚性方程组，给出了收敛性和数值结果；其次，对标准的一维逆热传导方程给出了一种基于Fourier正则化方法，给出了理论证明及其误差估计，解决了文献中算法与理论误差估计的不相匹配的现象，该正则化方法不仅保留了测量数据的部分高频成份，且与文献中的算法具有同样的计算量和误差估计。

Only through synthesizing the intellection of individuals can true innovations, which benefit both society and individuals, be made.

雷哥，你好，发现你的这个高频提纲和太傻里的不能对应起来，题目序号并且也相当混乱，建议将其能够整理一下，以方便G友们查阅。

The methods of adaptive median filter, variance ratio of interclass and intraclass segmentation, and mathematical morphology were used to decrease the noise of original welded seam image, to extract welded seam region, and to carry on high frequency enhancement transformation for the interior of extracted welded seam with frequency range sharpening.

利用自适应中值滤波方法和类间、类内方差比分割法及数学形态学方法对原始焊缝图像进行降噪和提取焊缝区域，并对提取的焊缝内部进行频域锐化的高频加强变换。

Simulation results indicated that the adaptive median filtering effectively removes noise, and maintain the details of welded seam and defection edge; the variance ratio of interclass and intraclass segmentation could accurately distinguished between the welded seam metal and the base metal together with mathematical morphology method; high frequency enhancement extrudes the welded seam center, consequently defects would be detected.

仿真结果表明自适应中值滤波能够有效去除噪声，并保持焊缝和缺陷的边缘细节；类间、类内方差比分割方法与数学形态学方法并用，能准确的将图像分割为焊缝与母材区域；高频加强变换能够使焊缝中心部位突显出来，从而实现缺陷的检测。

The calculation results show that the populations between the two states are Rabi oscillation in the absence of the rf field, square-wave oscillations in the presence of the slow rf field, and stair steps oscillations in the presence of the intermediate rf field.

计算结果表明：当调频场的频率比较低时，从一个态到另一个态的跃迁几率随时间演化为方波振荡；当调频场为中频时，跃迁几率为阶梯型振荡；在高频调频场中出现调频场的多光子共振。

Main research results are as follows:The distribution of electromagnetic field in inductor goes sameness when imposing high frequency magnetic field and intermediate frequency magnetic field where the magnetic flux density is symmetry along the center of inductor height and in which the distance from the center of inductor is further, the magnetic flux density is stronger.

主要结论如下：感应器通入高频电流和中频电流两种情况下，感应器内部的磁场分布趋势相同，感应器内部的磁感应强度沿感应器高度中心对称，半径越大的位置，磁感应强度越强。

On this basis, the prccesses of interrupting small inductive current by the vacuum interruptor were modelled in a computer program, and the effects of the circuit conditions on the vacuums ...

通过试验和模拟计算，获得了ZN—6/600真空开关有关截流、触头间隙击穿和电流高频过零熄弧的随机特性，分析了一些电路条件对真空开关开断感性小电流时的操作过电压的影响。

Accordingly, the R1 that manipulates small block value is OK the voltaic pulse of intromit C1 is opposite bigger, such, circuit can is opposite input signal extent dash forward add make faster response, namely " rise quickly " answer.

在低频至中频规模内，只有比较器的输入偏移误差会影响检测器的整体精度。在高频时，比较器的响应时候成为一个首要身分，它会降低 VOUT精度，特别是当频率增添时，情况会更糟。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！