1) time-frequency reassignment
时频重排
1.
Multiple window time-frequency reassignment based on Hermite window functions;
基于Hermite窗函数的多窗口时频重排方法
2.
Multi-components LFM signal recognition based on time-frequency reassignment and Wigner-Hough transform
基于时频重排与WHT的多分量LFM信号识别
3.
A time-frequency associated analyzed method based on wavelet transform and time-frequency reassignment and Hough transform is proposed.
针对传统的多分量LFM信号检测与参数估计中存在的精度不高和交叉项问题,将小波重排与Hough变换结合起来,首先对信号进行小波变换,克服交叉项干扰,再经过时频重排保证精度,以重排后的时频分布作为图像,利用Hough变换通过查表的方式,实现对各分量的依次截取和参数估计。
2) time frequency distribution reassigned
时频分布谱图重排
3) retiming
时序重排
1.
This paper proposed a new algorithm of retiming which can be combined well with other combinational optimization methods to speed up logic circuits.
提出了一种改进时序重排算法 ,使时序重排可以更有效地与其他组合优化算法结合起来 ,共同提高同步时序电路的速度 。
2.
This paper proposes a new algorithm of retiming which can be combined well with other combinational optimization methods to speed up logic circuits.
时序重排是一种同步时序电路性能优化的重要方法 。
4) time permutation
时域重排
5) time-frequency overlapped
时频重叠
1.
To solve the problems in modulation recognition for time-frequency overlapped two-signal combining QPSK with 16QAM in a single channel,a novel algorithm is proposed that adopts the combination of 2nd,4th,6th cyclic cumulants and establishes some robust classification features.
针对单通道QPSK-16QAM时频重叠双信号,提出了一种利用接收信号二、四、六阶循环累积量(HOCCs)构建分类特征的调制识别方法。
2.
To solve the problems in symbol rate estimation of time-frequency overlapped two-signal in the single-channel,the algorithm of the power spectrum based on fourth-order cyclic cumulants is presented.
提出一种基于四阶循环累积量的功率谱分析算法,用于解决单信道时频重叠双信号的码速率估计问题。
6) Pinacol rearrangement
频哪醇重排
1.
In the article,Pinacol rearrangement reaction is caculated by ab initio quantum mechanical method making use of Gaussian98 quantum chemistry programme.
运用Gaussian98量子化学程序,采用STO-3G基组,对频哪醇重排反应进行从头计算研究,得到了重排过渡态的系列量子化学参数,证实了本重排反应是在质子的作用下脱去一分子水,形成缺电子中心的碳正离子同时发生1,2-移位,生成稳定的频哪酮分子,反应中间态为正离子桥式三元环结构。
2.
Stereoelectronic effect in pinacol rearrangements of cyclohexanediol isbriefly discussed.
环己二醇发生频哪醇重排反应中，１，２－二甲基环已二醇的顺、反异构体在相同条件下生成不同产物是由立体电子效应控制的。
补充资料：逆频哪醇重排
分子式：
CAS号：
性质：当1,2,2,2-四苯基乙醇用乙酰氯处理时，生成四苯基乙烯。这一重排涉及的碳骨架的改变，相当于频哪醇重排的逆方向，因此被称为逆频哪醇重排。
CAS号：
性质：当1,2,2,2-四苯基乙醇用乙酰氯处理时，生成四苯基乙烯。这一重排涉及的碳骨架的改变，相当于频哪醇重排的逆方向，因此被称为逆频哪醇重排。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条