ddf

A new DDF design scheme is proposed via innovations theorem .

利用新息定理得到一种新的干扰解耦滤波器设计方法。

Property and Application Effect of Compound Catalyst DDF

DDF复合催化剂的性能及应用价值

Function of DDF Compound Catalyst in Preparation of Starch Size

DDF复合催化剂在淀粉浆调制中的作用

Design of DDF - II Dynamic Focus Electron Gun

DDF-Ⅱ型动态聚焦电子枪的研制

Application and Analysis of DDF Starch Compound Catalyst Sizing Material for Pure Cotton Fabric

DDF变性浆料在纯棉细布上浆中的应用分析

This results shows that the transportation bit rate is greater in DDF than in common fiber .

结果表明，DDF中的传输比特率比普通光纤中的大；

The results show that the fiber loss destroys the adiabatic compression effects in DDF ;

结果表明：光纤损耗严重破坏了DDF对基孤子绝热压缩的效果；

Simplified DDF Algorithm and the Application for Satellite-to-Satellite Passive Orbit Determination and Tracking

简化DDF算法及其在单星对星无源定轨跟踪中的应用

The broad gain bandwidth can be obtained by selecting the dispersion parameter of DDF .

选取色散缓变光纤的色散参量可以获得较大的增益带宽。

DDF is a good dispersion medium to produce modulation instability of XPM .

色散缓变光纤是XPM调制不稳定性的较好色散介质。

The Effect of Self-steeping on the Modulation Stability in DDF with Different Group Dispersion Profiles

自陡峭效应对不同群色散剖面色散缓变光纤中调制不稳定性的影响

System combine with hardware and software , hardware include test terminal , DDF ( Digital Distribution Frame ) and transmission device ;

该监控系统的实现分为硬件和软件两部分，硬件部分由测试终端、数字配线设备和传输设备组成；

Adopting the DRAs can improve the compression effects in DDF and get a higher compression factor and pulse energy ;

采用分布式的拉曼放大能对DDF的绝热压缩起到很好的优化效果，获得更高的压缩因子和脉冲能量；

DDF donations in any amount are welcome .

答：地区指定基金的捐赠任何金额都欢迎。

Work with club and district officers to ensure the full utilization of all DDF allocated to the Humanitarian Programs Category ;

与扶轮社及地区职员合作确使所有拨配人道计划类的地区指定用途基金全部充份用完；

Higherorder soliton can be compressed by NOLM Nonlinear optical fiber loop made of DDF Dispersion Decreasing fiber .

基于色散渐减光纤的非线性光纤环境（DDF-NOLM）能够有效压缩高阶孤子脉冲。

The supercontinuum ( SC ) spectra generated are compared in dispersion decreasing fibers ( DDF ) with different dispersion profile .

比较了在不同色散分布的色散渐减光纤中超连续（SC）谱的产生。

Timing jitter of ultrashort solitons propagating in dispersion-decreasing fiber ( DDF ) is analyzed through perturbation theory .

通过微扰理论分析了超短孤子在色散缓变光纤（DDF）中传输的时间抖动。

A new nonlinear optical loop mirror ( NOLM ) constructed from a dispersion decreasing fiber ( DDF ) and a normal fiber is proposed .

提出了一种由常规光纤和色散渐减光纤构成的新的非线性光纤环形镜（NOLM）。

The spreading factors are theoretically derived when a Gaussian pulse propagates in dispersion decreasing fibers ( DDF ) with different group dispersion profiles .

理论推导了高斯脉冲在5种群色散剖面色散缓变光纤（DDF）中传输时的展宽因子。

DDF solves the intrinsic bias of information-gain to some extent , which enhances the robustness of recognition algorithm .

在一定程度上解决了信息增益函数的内在偏置问题，提高了识别算法的鲁棒性；

The approach used dynamic data flow ( DDF ) graph as system model to describe the functional and performance requirements of the embedded system , which provided powerful description and analysis ability .

它以动态数据流图为系统模型对嵌入式软件的功能和性能需求进行了描述，由此提供了强大的描述和分析能力；

When Raman coefficient of DDF is constant , the timing jitter of a DDF-based system has a minimum value with different TOD parameters .

在光纤的拉曼系数一定的情况下，选择不同的三阶色散参数，系统的时间抖动存在一个最小值。

Moreover , different DDF has respective advantage in different application area . It provides the scientific gist to exert the optimum performance of different type of DDF in practice .

而且，不同类型的DDF在不同的应用领域各有其优越性，这为实际中趋利避害、更好的发挥不同类型DDF的最佳性能提供了科学依据。

In this article is introduced the reaction mechanism , property , and application effect of com-pound catalyst DDF used as sizing material for warp yarns of pure cotton and polyester / cotton .

本文主要介绍DDF复合催化剂的反应机理、性能以及该浆料在纯棉、涤棉经纱上浆中的应用价值。

Raman soliton self-frequency shift ( SSFS ) of ultrashort pulses propagating in a dispersion-decreasing fiber ( DDF ) is studied in this paper .

研究了色散缓变光纤中超短光脉冲的Raman孤子自频移现象。

It is also found that using a DDF with a greater dispersion parameter , or using a smaller walk-off effect can broaden the gain spectrum width and increase the maximum value of gain spectrum .

研究同时发现，较大的色散缓变参量及两光束较小的离散均会使增益谱的谱宽加宽，振幅的增长速度加快。

In this algorithm , the digital differential filtering ( DDF ) is used to process the sampled signals , the timing component of signal is improved , and therefore the convergence speed is quickened .

该方法用数字差分滤波对采样信号进行处理，提高了信号中的定时分量，从而加快了算法的收敛速度。

Though both HSC and HPC exhibit high compressive strength when subjected to 1550 DDF cycles in bitterns , HPC show a freezing-thawing durability much better than HSC .

HSC和HPC在盐湖卤水的1550次DDF作用下具有很高的强度，且HPC的抗冻性明显优于HSC。

In addition , the paper has given the block diagram of system , the data stream chart , the flowchart and main results in the system . A Hardware / Software Co-design Approach for Embedded System Based on DDF Model

文中给出了激光电源系统的硬件原理框图、数据流图、软件流程图和主要结果。基于动态数据流图的嵌入式系统设计