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250 results on '"Zhang, Zhi-rong"'

19. Efficacy and safety of esophagectomy via left thoracic approach versus via right thoracic approach for middle and lower thoracic esophageal cancer: a multicenter randomized clinical trial (NST1501)

Author

Mao, You-Sheng, primary, Gao, Shu-Geng, additional, Li, Yin, additional, Hao, An-Lin, additional, Liu, Jun-Feng, additional, Li, Xiao-Fei, additional, Rong, Tie-Hua, additional, Fu, Jian-Hua, additional, Ma, Jian-Qun, additional, Xu, Mei-Qing, additional, Zhang, Ren-Quan, additional, Xiao, Gao-Ming, additional, Fu, Xiang-Ning, additional, Chen, Ke-Neng, additional, Mao, Wei-Min, additional, Liu, Yong-Yu, additional, Liu, Hong-Xu, additional, Zhang, Zhi-Rong, additional, Fang, Yan, additional, Fu, Dong-Hong, additional, Wei, Xu-Dong, additional, Yuan, Li-Gong, additional, Muhammad, Shan, additional, Wei, Wen-Qiang, additional, Chiu, Philip Wai-Yan, additional, Lloyd, Shane, additional, Schlottmann, Francisco, additional, Meredith, Kenneth, additional, Pimiento, Jose M., additional, Gao, Yi-Bo, additional, and He, Jie, additional

Published
2022
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43. Separation and analysis method of overlapping absorption spectra with cross interference in gas mixture measurement

Author

Wu Bian, Xia Hua, Wang Qian-Jin, Li Qi-Yong, Zhang Zhi-Rong, Yang Xi, Pang Tao, Zhang Le-Wen, and Sun Peng-Shuai

Subjects
Materials science, Absorption spectroscopy, Interference (communication), Separation (aeronautics), Analytical chemistry, General Physics and Astronomy, Analysis method
Abstract

The interference between overlapping gas absorption lines often occurs in the measurement of multi-component gas mixture with using tunable diode laser absorption spectroscopy (TDLAS). This is also the main problem of the technology in some applications. For instance, in the early application of multi-component gas mixture measurement in coal mines, we found that the absorption lines of carbon monoxide (CO) and methane (CH4) seriously overlapped. The absorption signal of trace CO gas was annihilated and could not be effectively demodulated, especially in the presence of high concentration of CH4. This problem could not be solved just by accurately selecting the spectral lines due to the band absorption of CH4. Therefore, in this paper, we introduce the support vector regression (SVR) model to deal with the interference between CO and CH4 absorption lines. The spectral signals of 14 groups of mixed gases with different concentrations of CO and CH4 are used as the training sets, and the five-fold cross-validation is adopted to prevent the model from overfitting. After 15 iterations in 30 seconds, the optimal regression model of CO and CH4 can be obtained respectively. Furthermore, it is worth noting that based on the experimental data, the linear kernel function is selected to construct the two gas SVR models, and the parameters of the SVR models are optimized by the sequential minimal optimization(SMO) algorithm. With the assistance of the SVR models, the absorption spectra of the two gases can be demodulated effectively, and finally the accurate measurement results are obtained. The measurement results show that the absolute error of trace CO and CH4 concentration(volume fraction of gas) are less than 2 × 10–6 and 0.2 × 10–2 respectively. Meanwhile, the correlation coefficient between the measured values and the actual values of CO and CH4 are 0.998 and 0.9995, respectively. In addition, the dynamic stability for each of the two regression models is fully verified by the experiment of the inflation process. Consequently, this method can eliminate the interference between the overlapping spectra, and can fully meet the requirements for accurately measuring the gas mixture. We hope that the SVR model can provide an effective solution for the real-time monitoring of multi-component gas mixture, and thus greatly improving the adaptability of TDLAS technology in the future.

Published
2021

48. Single-center study on endovascular treatment of acute ischemic stroke with large vessel occlusion caused by carotid artery dissection.

Author

LIU Jun-jie, ZHANG Zhi-rong, ZHANG Liang, LI Kai-feng, HE Xiong-jun, and LIU Ya-jie

Subjects
SURGICAL complication risk factors, STROKE prognosis, BLOOD vessels, ENDOVASCULAR surgery, CEREBRAL hemorrhage, CATHETERIZATION, CEREBRAL infarction, CEREBRAL ischemia, EDEMA, HERNIA, SURGICAL stents, STROKE, SUBARACHNOID hemorrhage, SURVIVAL analysis (Biometry), THROMBOSIS, VEIN surgery, DISCHARGE planning, TREATMENT effectiveness, ACUTE diseases, CAROTID artery dissections, DISEASE complications, DISEASE risk factors
Abstract

Objective To explore the efficacy and safety of endovascular treatment (EVT) for acute ischemic stroke with large vessel occlusion (AIS-LVO) caused by carotid artery dissection (CAD). Methods From July 2018 to July 2019, 19 patients with AIS-LVO caused by CAD, including 11 cases of internal carotid artery (ICA) dissection and 8 cases of vertebral artery (VA) dissection, were treated with EVT (including thrombus aspiration, stent thrombectomy, balloon dilatation and stent implantation). Modified Thrombdy in Cerebral Infarction (mTICI) was to evaluate vascular recanalization, modified Rankin Scale (mRS) was to evaluate the prognosis. Results The forward blood flow of 15 patients recovered to mTICI grade 3 (complete recanalization), and 4 patients recovered to mTICI grade 2b (partial recanalization). Patients with postoperative complications were: one case of death caused by cerebral hernia, one case of cerebral edema due to a large cerebral infarction, one case had a small amount of cerebral hemorrhage, one case of subarachnoid hemorrhage. Seventeen patients had good prognosis at discharge (mRS score ≤ 2), one case had a poor prognosis (mRS score 4), and one case died. Conclusions Patients with AIS-LVO caused by CAD were assessed and treated with EVT, and the effect of recanalization of occlusive vessels is obvious, and the clinical prognosis is good. [ABSTRACT FROM AUTHOR]

Published
2020
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