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In this paper,the design methods of time difference receiver of passive detection and tracking radar system,based on passive position finding of three station time difference,are presented in detail,and channelization receiver technique and mixer threshold detection method are adopted.

较详细介绍了一种基于三站时差定位体制的无源探测与跟踪雷达系统时差接收机的设计，该方案采用了信道化接收技术和混合门限信号检测方

The experimental results show that this instable drift of threshold voltage induced by slow interface states is repeatable at each power-on measurement.

结果表明，该种由慢界面态造成的阈电压变化在每次开机测量下具有重复性。

In this paper,a threshold authentication scheme of ad hoe network based on elliptic curve is proposed,in using Lagrange Theorem to generate the group key and in using the digital signature algorithm based on elliptic curve to generate and merge the sub certificates.

论文提出一种基于椭圆曲线的门限身份认证方案，利用拉格朗日定理生成群密钥并利用椭圆曲线数字签名算法生成子证书并合成，该算法的安全性、高效率以及低计算复杂度特别适合Ad hoc网络移动自组的特点。

It is presented that indirect assimilation experiment of CMW data from TCFM method improves effectively not only on vertical velocity field but for precipitation.4 Based on theory analysis, E-Ir relationship is brought forward with two electrification mechanisms. One is inductive mechanism, i.e., cloud particles collide with precipitation particles then flick away, the other is noninductive mechanism because of different temperature, i.e., bigger supercooled cloud particles collide and freeze with hail particles combined with ice scraps. By means of CINRAD and FY2C data assimilation, precipitation intensity Ir can be obtained, then electric field intensity E, discharge time and locations can be achieved with supposed threshold 300KV/m. Though it can not distinguish between IC (Intra-Cloud) lightning and CG (Cloud-to-Ground) lightning, results are still comparable to LLS observations.5 Example analysis shows that the relationship between precipitation data from AMS and CG data from LLS is not very clear.

同化实验对于台风眼区的螺旋形雨带贡献显著，说明TCFM云导风资料同化实验不仅有效调整了模式的垂直速度场，还对降水模拟有了明显改善。4通过理论分析，利用云粒子与极化降水粒子碰撞并弹离的感应起电机制和较大过冷云滴与雹粒碰冻并产生冰屑的温差起电机制下得到的E-Ir，由雷达、卫星遥感资料直接和间接同化模拟得到Ir，来反推E，了解雷暴云中闪电强度的平面分布，设置放电阈值为300KV/m，推算出放电的位置和首次发生闪电的时间。

This test apparatus is able to measure the drain-source breakdown voltage, static drain-source on resistance, gate threshold voltage, forward transconductance and input capacitance of power MOSFET accurately, which has been applied in practice.

所设计的功率MOSFET测试仪可以进行功率MOSFET的耐压、沟道电阻、开启电压、跨导及输入结电容几个参数的精确测量，并已实用化。

On this basis, we consider a class of suboptimum detectors for the asynchronous SSMA system whose decision algorithms consists of a linear transformation followed by a set of threshold devices.

在此基础上，针对随机多址扩频通信系统的情况，分别提出了两种线性检测器—最小均方误差检测器和加权最小平方检测器，以及一种非线性检测器—判决反馈检测器，给出了它们的实现原理和方法。

Db8 wavelet and the soft threshold based on Steins Unbiased Estimate of Risk are used to smoothly denoise.

为进一步提高局部放电信号的提取精度，采用Db8小波及无偏似然估计阈值规则进行平滑去噪。

Secondly, on this foundation, this thesis summarises characters of podcast, such as freedom, easy taking, strong interaction, easy threshold, multidissemination and nonfinite dissemination, compared with traditional mediums like broadcast, television and internet television. And this thesis also puts forward that the podcast is a kind of medium of grass roots against traditions.

其次，在此基础上，本文在比较播客与博客、播客与传统广播电视、播客与网络电台和网络电视的过程中总结出播客的六大媒介特点，即自由、便携、互动性强、准入门槛低、多媒体传播、非线性传播等特点，提出播客是一种颠覆传统的草根媒介。

If at this point the mouse on a control chip output identified as bright signal, B tube output for the secret signal, mouse and so on signal processing, and chip processing will cause the receiving component to receive tube B and mouse chip output voltage of light determine the minimal threshold dark changes.

若此时鼠标芯片对甲管输出识别为亮信号，乙管输出为暗信号，鼠标依此对信号进行处理，而芯片的处理必引起接收组件中甲乙接收管的输出电压及鼠标芯片对亮暗判别阀值的微小的变化。

Audio denoising is the pre-step in the audio processing,and wavelet domain denoising has been a main research area.In order to give people a summary knowledge of wavelet domain audio denoising,based on many literatures,this paper attempts to make a survey of wavelet domain audio denoising.First,it introduces wavelet transformation and the characteristics,and gives the optimal selecting and dealing criterion of wavelet domain denoising,the basis wavelet selection.Second,describes five classical methods of audio denoising,for example,threshold,multi-wavelet,wavelet packet,modulus maximum and scale correlation,then introduces their development.Third,introduces a new algorithm based on modulus maximum and scale trading theory.At the end,the future trend of wavelet domain audio denoising is pointed out.

音频降噪是音频处理前期的必要步骤，小波域降噪是其中一个重要的研究方向，为了使人们对小波域音频降噪有概括了解，在对小波域音频降噪相关文献进行分析和理解的前提下，首先介绍了小波变换及其特性，同时阐述了小波降噪的最优选取和处理准则，及对音频进行小波变换时小波基的选取原则；然后评述了用于音频降噪的阈值，多小波、小波包、模极大值和尺度相关法等5类方法及各自的发展；接着介绍在前人基础上，提出新的基于模极大值和尺度理论的降噪算法；最后探讨了小波域音频降噪的发展方向。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。