[1] [1] AN J, HAN Y, LIU B Y. Progress in greening process of rubber vulcanization accelerator MBT［J］. China Rubber, 2015, 31(10): 46-48(in Chinese).

[2] [2] WANG Zh, LI H L, JIA T X, et al. Preparation and spectral analysis of tetra sulfide thiuram vulcanized rubber vulcanization accelerator［J］. Spectroscopy and Spectral Analysis, 2015, 35(07): 1875-1878 (in Chinese) .

[3] [3] LIAN J S. Application of vulcanizing agent DTDM in rubber ［J］. World Rubber Industry, 2003, 60(3): 14-16 (in Chinese).

[4] [4] ZHANG Zh, MENG K, ZHU L G, et al. Study on terahertz wave absorption characteristics of ischemic rat brain tissue［J］. Laser Technology, 2016, 40(3): 372-376 (in Chinese).

[5] [5] OUYANG A G, CAI H Zh, LI B, et al. Quantitative detection of te-rahertz in benzoic acid in corn flour［J］. Laser Technology, 2020, 44(4): 478-484(In Chinese).

[6] [6] ZHANG H, LI Z, HU F, et al. Sensitive distinction between herbs by terahertz spectroscopy and a metamaterial resonator［J］. Spectro-scopy Letters, 2018, 51(4): 174-178.

[7] [7] PETERS O, SCHWERDTFEGER M, WIETZKE S, et al. Terahertz spectroscopy for rubber production testing［J］. Polymer Testing, 2013, 32(5): 932-936.

[8] [8] LOCKHARTL P, RAMOTOWSKI T, RICE M. Terahertz frequency optical properties of acoustic materials［J］. Polymer Testing, 2014, 34(4): 140-145.

[9] [9] MIAO Q, TIAN L, ZHAO K, et al. Terahertz spectroscopic investigations of three kinds of rubber materials［J］. Modern Scientific Instruments, 2011, 37(5): 110-113(in Chinese).

[10] [10] ZHANG X Sh, Ch T Y, CUI H L, et al. Terahertz dielectric spectrum in thermal aging of natural vulcanized rubber ［J］. Infrared and Laser Engineering, 2018, 47(10): 291-296(in Chinese).

[11] [11] SIQUEIRA L F S, MORAIS C L M, ARAU＇JO JU＇NIOR R F, et al. SVM for FT-MIR prostate cancer classification: An alternative to the traditional methods［J］. Journal of Chemometrics, 2018, 32(12): 12-14.

[12] [12] PASADAS D J, RAMOS H G, FENG B, et al. Defect classification with SVM and wideband excitation in multilayer aluminum plates［J］. IEEE Transactions on Instrumentation and Measurement, 2020, 69(1): 241-248.

[13] [13] LIU Z, ZHOU F, QIN Z, et al. Classification of stellar spectra with SVM based on within-class scatter and between-class scatter［J］. Astrophysics and Space Science, 2018, 363(7): 140-145.

[14] [14] QIN B Y. Application of terahertz spectroscopy combined with stoichiometry in rapid detection of crop pesticide residues［D］. Xi’an: Xidian University, 2018:67-68(in Chinese).

[15] [15] CHANG B, TSAI H, YEN C. SVM-PSO based rotation-invariant image texture classification in SVD and DWT domains［J］. Engineering Applications of Artificial Intelligence, 2016, 52(6): 96-107.

[16] [16] WANG X, GUAN S, HUA L, et al. Classification of spot-welded joint strength using ultrasonic signal time-frequency features and PSO-SVM method［J］. Ultrasonics, 2019, 91(1): 161-169.

[17] [17] CHEN T, CAI Zh H, HU F R, et al. Terahertz time-domain spectroscopy study of structurally similar monosaccharide and disaccharide molecules ［J］. Spectroscopy and Spectral Analysis, 2019, 39(3): 686-692(in Chinese).

[18] [18] QIN B, LI Z, CHEN T, et al. Identification of genetically modified cotton seeds by terahertz spectroscopy with MPGA-SVM［J］. Optik, 2017, 142: 576-582.

[19] [19] KUANG F J, XU Y H, ZHANG S Y. Hybrid kernel SVM parameter optimization based on improved chaotic particle swarm and its application［J］. Application Research of Computers, 2014, 31(3): 671-674(In Chinese).

[20] [20] WANG X M, WANG H F, YAO N F. Parametric optimization of laser displacement sensor based on particle swarm optimization algorithm ［J］. Laser Technology, 2018, 42(2): 181-186(in Chin-ese).

[21] [21] DENG X, LIU Q, DENG Y, et al. An improved method to construct basic probability assignment based on the confusion matrix for classification problem［J］. Information Sciences, 2016, 340/341(9): 250-261.