DDF
英
美
abbr. 设计解密格式(Design Disclosure Format); 显示与任务报告设施(Display and Debriefing Facility); 文献描述文件(Document Description File)
双语例句
- 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。 - 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； - DDF donations in any amount are welcome.
答：地区指定基金的捐赠任何金额都欢迎。 - 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。 - 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 - 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。 - The interpolation filter based on the stirling interpolation formula is applied in solving the nonlinear filter problems in single station outside radiant passive location.
把一种基于stirling内插公式的插值滤波器（DDF），应用于单站外辐射源无源定位中的非线性滤波问题。 - 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。 - When two optical waves transmit in common fiber or decreasing dispersion fiber, XPM occurs at two spectrum regions in both the normal and the anomalous dispersion region.
双光束传输时，在普通光纤和色散缓变光纤（DDF）的正常和反常色散区，XPM不稳定均发生在两个频谱区。 - 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； - By non-linear Schrdinger equation, soliton interaction in decreasing-dispersion fiber ( DDF) was simulated using split-step Fourier transformation and Matlab program. The results are compared with the soliton interaction in common fiber.
以非线性薛定谔方程为理论依据，应用对称傅立叶变换，采用MATLAB编程，对色散缓变光纤（DDF）中孤子间相互作用进行了理论模拟，并与普通光纤进行了比较。 - Raman soliton self frequency shift ( SSFS) of ultrashort pulses propagating in a dispersion decreasing fiber ( DDF) is studied in this paper. A General expression for SSFS is obtained using the adiabatic perturbation approach.
利用绝热扰动法研究了色散缓变光纤中Raman孤子自频移效应，得到了色散缓变光纤中Raman孤子自频移的表达式。 - 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； - 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 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。 - 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 main results are summarized as follows: First, we employed a fast, efficient numerical algorithm which switches back and forth between real and Fourier spaces to simulate distant dipolar field ( DDF) and diffusion effects for heterogeneous three-dimensional structures.
本文的主要内容如下：一、利用快速、高效的数值算法成功模拟了三维结构样品的iMQC成像信号，该算法通过傅立叶变换能在k空间中处理远程偶极场和扩散等效应。 - 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； - 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 - 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 - 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。 - Property and Application Effect of Compound Catalyst DDF
DDF复合催化剂的性能及应用价值 - In this paper three dispersion management system: dispersion management soliton ( DMS) system, dense dispersion management soliton ( DDMS) system and dispersion-decreasing fiber ( DDF) soliton system were investigated by numerically simulation.
对常规色散管理孤子系统（DMS）、密集色散管理孤子系统（DDMS）、色散渐减光纤（DDF）孤子系统进行了数值模拟研究和分析。 - 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。 - 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； - Further research indicates that strength of concretes subjected to DDF decreased alone with the increasing of freezing-thawing cycles, and the strength losing of OPC and APC is more evident than those of HSC and HPC.
进一步的研究指出，混凝土在DDF作用下的强度基本上随着冻融循环次数的增加而降低，而且OPC和APC的冻融强度损失明显高于HSC和HPC。 - 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）。 - 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。