A Bibliometric Analysis and Visualization of Fractional Order Research in China over Two Decades (2001–2020)

Table 5

Translation of keywords in Figure 6.

No.	The keywords	Translation
1	线性调频信号	Linear frequency modulation signal
2	参数估计	Parameter estimation
3	信息处理技术	Information processing technology
4	分数阶微积分	Fractional calculus
5	分数阶傅里叶变换	Fractional Fourier transform
6	边缘检测	Edge detection
7	投影同步	Projective synchronization
8	信号检测	Signal detection
9	小波变换	Wavelet transform
10	初值问题	Initial value problem
11	算子矩阵	Operator matrix
12	schauder不动点定理	Schauder fixed point theorem
13	误差估计	Error estimation
14	唯一性	Uniqueness
15	守恒量	Conserved quantity
16	不动点定理	Fixed point theorem
17	鲁棒性	Robustness
18	积分边值问题	Integral boundary value problem
19	内模控制	Internal model control
20	分数阶模型	Fractional order model
21	自适应	Self-adaptive
22	分数阶pid控制	Fractional order PID control
23	p-Laplacian算子	p-Laplacian operator
24	精确解	Exact solution
25	遗传算法	Genetic algorithm
26	粒子群算法	Particle swarm optimization