TFD

The application of TFD monitoring parameters during spine surgery may avoid spinal injury effectively .

在脊柱手术中如果应用时频监护参数可能会更有效地避免脊髓损伤。

Internal stresses caused by interfacial electron transfer are also calculated using the modified TFD model .

并基于改进的TFD模型，对任意膜厚下由界面电子转移引起的膜内应力作了理论估算。

Cohen Class TFD with High Readability and Its Using in Spread Spectrum Communication Systems

具高可读性的Cohen类时频分布及其在扩频通信中的应用

So we consider the post process of TFD .

因此我们考虑时频分布的后处理方法。

Potential at atomic boundaries in the tf ( or tfd ) model and equations of States

TF（或TFD）模型中原子的边界势及状态方程

The treatment group received treatment from the proposed TONGFENGQINGJIETANG ; Control group received oral treatment of TFD Capsule .

治疗组给予自拟痛风清解汤治疗；对照组给予痛风定胶囊口服治疗。

Effect of anti-tumor iRNA and TFD on the immune function of carcinoma patients receiving chemotherapy arter operation

抗肿瘤iRNA和TFd对癌症术后应用化疗病人免疫功能的影响

We suggested that TFD could repair the chromosome damage induced by X-irradiation , and discussed the repairing mechanism .

我们初步认为，TFD对X线诱发的染色体损伤可能具有修复功能，并对其修复的可能机理予以初探。

Based on it , analysis and comparison has been made among three kinds of commonly-used time-frequency distribution ( TFD ) from theory and simulation .

以此为基础，从理论和仿真对几种常用的时频分析方法进行对比和分析。

The time-frequency distribution ( TFD ) fits to analyze the EEG signal well since EEG is a typical non-stationary signal .

由于脑电信号（EEG）是典型的非平稳时变信号，因此时频分析方法比较适用于分析和处理EEG信号。

Based on the design of a new kernel function , a new Time-Frequency Distribution ( TFD ) is proposed and is applied to mechanical faults diagnosis .

在巧妙构思核函数的基础上，给出了一新的时频分布TFD（Time-FrequencyDistribution）及其离散算法，并应用于机构故障诊断。

This kind of TFD can tune its kernel ambiguity function shape by two dimensional optimization procedure according to the characteristics of the analyzed signal .

这种时频分布根据被分析信号不同特性，采用优化方法自适应对模糊函数进行整形，尽可能保留集中在原点的信号模糊函数的自分量，抑制远离原点的交叉分量。

Taking advantage of advanced SEM and TEM technology and modern TFD theory , explanation to microscope bonding mechanism of cold pressure welding was made .

利用近代界面及表面电子结构理论（改进的TFD理论）和现代先进分析测试技术对冷压焊结合的微观机理进行了分析。

It appeared that TFD has well cell immune regulator function and increases cell immune ruction of the patients with gastric cancer after chemotherapy .

显示了TFD具有良好的细胞免疫调节作用，可提高胃癌患者化疗后的细胞免疫机能。

This paper based on ambiguity function theory analyzes the cause of cross-components and gives the optimization algorithm of adaptive TFD with radially-gaussian kernel .

文中以模糊函数理论为基础，分析了时频分析产生交叉项的原因，给出了以径向高斯函数为核函数的自适应时频分析优化算法。

These findings may be helpful for the deeper cognition to RNAi and TFD strategy , and provide a useful tool for molecular biological investigation .

这些发现有助于提高对RNAi及TFD策略的进一步认识，并可能为分子生物学提供新的有力工具。

Effcet of heterogeneous specific anti-tumor iRNA and TFD on the immune function of 48 carcinoma patients receiving chemotherapy after operation were observed .

本文用异种特异性抗肿瘤iRNA和TFd对48例癌症术应用化疗病人进行了免疫功能观察。

However TFD with adaptive radially-gaussian kernel can suppress the cross-component well , because its kernel vary with signal adaptively .

而基于信号的自适应径向高斯核函数时频分布，由于它的核函数随信号而自适应的改变，因此对交叉项有很好的抑制效果。

Time-frequency distribution ( TFD ) of multi-component signal can produce cross-components , TFD with fixed kernels perform well only for limited signals .

多分量信号的时频分布会产生交叉项，采用固定核函数的时频分布，其适用的信号形式有很大的局限性。

The experiments are presented to show the RGK TFD has superior character extracting ability than the traditional fixed kernel TFD that is often used in fault diagnosis .

试验证明径向高斯核函数时频分布在故障诊断中有较强的特征提取作用。

Simulations indicate that the TFD with radially-gaussian kernel not only suppress cross-component well but also have good resolution for auto-component .

仿真结果表明，对于多分量信号，采用径向高斯核函数的自适应时频分析方法不仅对交叉项有很好的抑制作用，而且对信号的自分量具有较好的聚集作用。

The behavior of an improved Pall typed frictional damper ( PFD ), the T shaped core plate frictional damper ( TFD ), is studied through tests and numerical analysis .

本文对一种改进的Pall摩擦阻尼器&T形芯板摩擦阻尼器的性能进行了试验研究和数值分析。

The limitations of time-frequency distribution ( TFD ) with fixed kernel on cross-components suppression are analyzed and the improvement of time-frequency resolution using signal-dependent adaptive kernel TFD is explored .

分析了固定核函数时频分布在抑制交叉项方面的局限性以及基于信号特征的自适应时频分布对时频分辨率的改善。

By making use of thermo-field dynamics ( TFD ), the quantum fluctuations of current of the mesoscopic lossless transmission line in the vacuum state , the coherent states and the squeezed states with thermal noise have been studied .

利用热场动力学的方法研究了介观无损耗传输线中电流在具有热噪声的真空态、相干态和压缩态下的量子涨落。

We report the changes of phenotype and antitumor cytolytic activity of glioma-infiltrating lymphocytes ( GIL ) before and after recombinant interleukin-2 ( rIL-2 ) and thymic factor D ( TFD ) .

经重组白细胞介素2（rIL－2）和胸腺因子D（TFD）培养前后的人脑胶质瘤浸润淋巴细胞（GIL）的表型及抗自体瘤细胞活性变化。

In this paper , we make a helpful exploring research by adding the inter-frame dynamic information into the time-frequency principal component ( TFPC ) feature and introducing the Cohen bilinear time-frequency distribution ( TFD ) technology into the feature extracting processing .

本文通过向原始特征中加入动态信息和将Cohen类双线性时频分布技术引入语言辨识特征提取过程两种方法对第一个问题作了有益的探索研究。

A more complete theoretical model based on the thermionic-field-dif-fusion ( TFD ) theory including recombination effects in the space-charge-region ( SCR ) for abrupt heterojunction bipolar transistors ( HBTs ) with a setback layer is presented in this paper .

建立了带有不掺杂隔离层的突变异质结双极晶体管（HBT）模型，在热场发射－扩散（TFD）理论的基础上，又考虑了空间电荷区中的复合效应。

It is shown that the new TFD with compound kernel has stronger ability than the exponential distribution ( ED ) and the cone-shaped kernel distribution ( CKD ) in reducing cross terms , meanwhile almost not decreasing the time-frequency resolution of ED or CKD .

结果表明，基于指数分布（ED）和锥形核分布（CKD）的复合核分布（ECKD）具有更强的抑制交叉干扰性质，同时几乎不会使ED或CKD的时频分辨力降低。

To determine whether a maneuvering target exists in a long integration time in Sky-Wave or Surface-wave over-the-horizon radar ( OTHR ), a new detection method based on time-frequency distribution ( TFD ) and morphological filtering is proposed to detect the maneuvering targets in OTHR systems .

为了检测天波地波超视距雷达（OTHR）长积累时间中是否存在机动目标，提出了一种基于时频分布（TFD）和形态学滤波检测OTHR系统中的机动目标的新方法。

The hysteretic behavior of an improved Pall frictional damper ( PFD ) T-shaped cone plate frictional damper ( TFD ) is analyzed based on the geometrical nonlinearity of four-link mecha - nism of the damper . and corresponding verification test is carried out .

本文从Pall摩擦阻尼器四连杆机构的几何非线性变形特征出发，分析一种改进的Pall摩擦阻尼器&T形芯板摩擦阻尼器的滞回特性以及支撑的受力特点。