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Error-Correcting Codes Scheme for Remote Control System
Wang, Mu kun,Yin, Xiao Hua,Zhao, Xian Ming,Li, Zheng Lian 대한전자공학회 1992 HICEC:Harbin International Conference on Electroni Vol.1 No.1
How to rise the reliability of the data transmission is one of the main problem faced by modern digital communication designer. This paper studies the error-correcting codes being suitable for the channel existing both the random error and the burst error. A new error control scheme is given. The scheme is a concatenated coding system using an interleaved Reed-Solomon code with symbols over GF (2⁴) as the outer code and a Vitcrbi-decoded convolutional code as the inner code. As a result of the computer simulation, it is proved that the concatenated coding system has a output at a very low bit error rate (BER) and can correct a lot of compound error pattern. It is suitable for the serious disturb channel existing both the random error and the burst error. This scheme will be adopted for a remote control system
Dou, Xue,Wang, Ren-Ben,Yan, Hong-Jiang,Jiang, Shu-Mei,Meng, Xiang-Jiao,Zhu, Kun-Li,Xu, Xiao-Qing,Mu, Dian-Bin Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.6
Objective: The objective of this study was to identify clinical predictive factors for tumor response after neoadjuvant chemoradiotherapy (nCRT) in locally advanced rectal cancer (LARC). Methods: All factors were evaluated in 88 patients with LARC treated with nCRT. After a long period of 4-8 weeks of chemoradiotherapy, 3 patients achieved clinical complete response (cCR) and thus aggressive surgery was avoided, and the remaining 85 patients underwent a curative-intent operation. The response to nCRT was evaluated by tumor regression grade (TRG) system. Results: There were 32 patients (36.4%) with good tumor regression (TRG 3-4) and 56 (63.6%) with poor tumor regression (TRG 0-2). Lymphocyte counts and ratios were higher in good response cases (P=0.01, 0.03, respectively) while neutrophil ratios and N/L ratios were higher in poor response cases (P=0.04, 0.02, respectively). High lymphocyte ratios before nCRT and good tumor regression (TRG3-4) were significantly associated with improved 5-year disease-free survival (P<0.05). Pretreatment nodal status was also significantly associated with 5-year disease-free survival and 5-year overall survival (P<0.05). Multivariate analysis confirmed that the pretreatment lymphocyte ratio and lymph nodal status were independent prognostic factors. Conclusion: Our study suggested that LARC patients with high lymphocyte ratios before nCRT would have good tumor response and high 5-year DFS and OS.
Dou, Xue,Wang, Ren-Ben,Meng, Xiang-Jiao,Yan, Hong-Jiang,Jiang, Shu-Mei,Zhu, Kun-Li,Xu, Xiao-Qing,Chen, Dong,Song, Xian-Rang,Mu, Dian-Bin Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.2
Objective: The purpose of this study was to examine the role of programmed cell death 4 (PDCD4) expression in predicting tumor response to neoadjuvant chemoradiotherapy and outcomes for patients with locally advanced rectal cancer. Methods: Clinicopathological factors and expression of PDCD4 were evaluated in 92 patients with LARC treated with nCRT. After the completion of therapy, 4 cases achieved clinical complete response (cCR), and thus the remaining 88 patients underwent a standardized total mesorectal excision procedure. There were 38 patients (41.3%) with a good response (TRG 3-4) and 54 (58.7%) with a poor one (TRG 0-2). Results: Immunohistochemical staining analyses showed that patients with high expression of PDCD4 were more sensitive to nCRT than those with low PDCD4 expression (P=0.02). High PDCD4 expression before nCRT and good response (TRG3-4) were significantly associated with improved 5-year disease-free survival and 5-year overall survival (P<0.05). Multivariate analysis demonstrated that the pretreatment PDCD4 expression was an independent prognostic factor. Conclusion: Our study demonstrated that high expression of PDCD4 protein is a useful predictive factor for good tumor response to nCRT and good outcomes in patients with LARC.
Fei Han,Zhen Qian,Yun Wang,Xiu-Kun Wang,Si-chao Mu,Shi-Chao Ding 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.24 No.2
Chain-die forming is a new sheet metal forming process, which can be used to produce complex and variable cross-section UHSS automotive structural parts. In this paper, the web-warping and the longitudinal strain developed in the sheet metal during the chain-die forming process are investigated by the finite element analysis, and the accuracy of the model is verified by the experimental work by comparing the longitudinal strain of the product with a forming angle of 60°. The reasons for web-warping in chain-die forming and the effects of different process parameters on web-warping are analyzed. The results show that the side leg height has the most significant effect on the longitudinal strain development, followed by material strength, sheet metal thickness and turning radius. Likewise, the linear regression model confirms that the material strength has the most significant effect on the web-warping height while the forming angle and side leg height have less influence during chain-die forming variable cross-section profile.
Preparation and deposition mechanism of pyrolytic carbon by CVI using 3D Ni/wood-carbon catalyst
Lulu Han,Xiaohong Shi,Xu Han,Li Yang,Kun Li,Tian Xinfa,Mu Jierui,Wang Guoqing 한국탄소학회 2022 Carbon Letters Vol.32 No.1
To improve the pyrolytic carbon (PyC) deposition rate of Carbon/Carbon (C/C) composites prepared by the traditional chemical vapor infiltration (CVI) method, the 3D Ni/wood-carbon (3D Ni/C) catalyst was introduced into the CVI process. The effects of catalyst on the density of C/C composites were studied, and the deposition rate and morphologies of PyC were investigated after catalytic CVI. The morphologies of catalyst and PyC were characterized by scanning electron microscope and polarized light microscopy. The catalytic deposition mechanism of PyC was studied by density functional theory. The experimental results show that the initial carbon deposition efficiency of the catalytic pyrolysis process was 3–4 times that of the noncatalytic process. The catalyst reduced the energy barrier in the first step of deposition reaction from 382.55 to 171.67 kJ/mol according to simulation results. The pyrolysis reaction energy with Ni catalyst is reduced by 54% than that without the catalyst.