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Parameter Estimation of 2-D Stochastic FM Model based on Two Step Estimation Procedure
Jia-Rui Cui,Qing Li,Guang-Da Hu,Zhen-Yu Lu 제어·로봇·시스템학회 2013 International Journal of Control, Automation, and Vol.11 No.3
This paper considers the problem of estimating the parameters of two-dimensional (2-D) stochastic FM models. First, the estimators of the parameters of 2-D stochastic FM model are obtained using two step estimation procedures by Kronecker product and least square method. Then, the asymptotic properties of the estimators are given. It is shown that the estimators are to be consistent and to have a distribution which converges to that of a normally distributed random vector under fairly general conditions. Finally, the performance of the proposed methods is illustrated by examples.
Asymptotical Stability for 2-D Stochastic Coupled FMII Models on Networks
Jia-Rui Cui,Qing Li,Guang-Da Hu,Zhi-Yu Tao,Zhen-Yu Lu 제어·로봇·시스템학회 2015 International Journal of Control, Automation, and Vol.13 No.6
In this paper, computable stability criteria for two dimensional stochastic coupled FMII models on networks are studied based on Kronecker product and nonnegative matrices theory. Necessary and sufficient condition for two dimensional stochastic coupled FMII models on networks is presented, this is the first time that has been proposed. Then, computable mean-square asymptotic stability criteria are derived via Kronecker product and the nonnegative matrix theory. The criteria are only sufficient conditions. Finally, illustrative examples are provided.
Monte Carlo simulation and study of REE/PET composites with wide γ-ray protection
Cui Tongyan,Chen Ruixin,Bi Shumin,Wang Rui,Ma Zhongjian,Jia Qingxiu 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.8
In this paper, rare earth element (REE)/polyester composites were designed with lanthanum oxide, gadolinium oxide, and lutetium oxide as ray shielding agents, and polyethylene terephthalate (PET) as the base. Monte Carlo simulation was carried out using FLUKA software. We found that the radiation protection performance of the composite is affected by the type and amount of REE; a higher amount of REE equated to a better radiation protection performance of the composite. When the thickness of the composite and total thickness of the REE is constant, the number of superimposed layers inside the composite does not affect its shielding performance. Compared with a single-type REE/PET composite, a mixed-type REE/PET composite has a wider range of g-ray absorption and better radiation protection performance. When the mass ratio of PET to REE is 2:8 and different types of REE are mixed with equal mass, several 0.2 cm-thick mixed-type REE/PET composites can shield >70% of 60 and 80 KeV g-rays
Jun-Rui Xu,Jun-Jia Cui,Guangyong Sun,Yan-Rong Li,Chun-Feng Li 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
The plain strain of AZ31 magnesium alloy sheet in magnetic pulse forming was investigated by numerical simulation and experimental method. Combination of uniform pressure coil and Holmberg's specimen was employed to evaluate the plain strain of AZ31 sheet. The numerical simulation for magnetic pulse plain strain of AZ31 sheet is performed by means of ANSYS FEA software. The magnetic flux density of uniform pressure coil was distributed uniformly, especially at the center of gauged area of AZ31 sheet directly in relation to the deformation behavior of AZ31 sheet. The velocity of typical point increases as increasing energy, and the more position closes to the center of sheet the higher velocity achieves. The forming height is increased with increasing discharge voltage. Compared with C=768 μF and C=1536 μF, the capacitance of 1152 μF is more effective for forming, which is confirmed by experiments. The peak velocity at the center of sheet is about 105 m/s. The major strains of magnetic pulse plane strain lie approximately in the strain ranges of 5.83-6.45%. However, the 3.22-3.82% (major strain) are the limit strains in quasi-static condition. The experimental results indicate that the major strain of AZ31 sheet improves about 75% compared with the quasi-static case.
( Gao Rui Fang ),( Xu Feng Yuan ),( Jia Jia Li ),( Xiao Fen Wang ),( Xu Cheng ),( Wan Bin Zhu ),( Zong Jun Cui ) 한국미생물 · 생명공학회 2012 Journal of microbiology and biotechnology Vol.22 No.8
A novel two-phase anaerobic treatment technology was developed to treat high-concentration organic cassava bioethanol wastewater. The start-up process and contribution of organics (COD, total nitrogen, and NH4+-N) removal in spatial succession of the whole process and spatial microbial diversity changing when sampling were analyzed. The results of the start-up phase showed that the organic loading rate could reach up to 10 kg COD/m3d, with the COD removal rate remaining over 90% after 25 days. The sample results indicated that the contribution of COD removal in the pre-anaerobic and anaerobic phases was 40% and 60%, respectively, with the highest efficiency of 98.5%; TN and NH4+-N had decreased to 0.05 g/l and 0.90 g/l, respectively, and the mineralization rate of total nitrogen was 94.8%, 76.56% of which was attributed to the anaerobic part. The microbial diversity changed remarkably among different sample points depending on the physiological characteristics of identified strains. Moraxellaceae, Planococcaceae, and Prevotellaceae were dominant in the pre-anaerobic phase and Bacteroidetes, Campylobacterales, Acinetobacter, Lactobacillus, Clostridium, and Bacillus for the anaerobic phase. Methanosarcinaceae and Methanosaeta were the two main phylotypes in the anaerobic reactor.
Wang, Chao,Xiao, Qian,Li, Yu-Wen,Zhao, Chao,Jia, Na,Li, Rui-Li,Cao, Shan-Shan,Cui, Jia,Wang, Lu,Wu, Yin,Wen, Ai-Dong Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.7
Adenocarcinoma of lung has high incidence and a poor prognosis, woith chemotherapy as the main therapeutic tool, most commonly with cisplatin. However, chemotherapy resistance develops in the majority of patients during clinic treatment. Mechanisms of resistance are complex and still unclear. Although annexin play important roles in various tumor resistance mechanisms, their actions in cisplatin-resistant lung adenocarcinoma remain unclear. Preliminary studies by our group found that in cisplatin-resistant lung cancer A549 cells and lung adenocarcinoma tissues, both mRNA and protein expression of annexins A1, A2 and A3 is increased. Using a library of annexin A1, A2 and A3 targeting combined molecules already established by ourselves we found that specific targeting decreased cisplatin-resistance. Taken together, the underlined effects of annexins A1, A2 and A3 on drug resistance and suggest molecular mechanisms in cisplatin-resistant A549 cells both in vivo and in vitro. Furthermore, the study points to improved research on occurrence and development of lung adenocarcinoma, with provision of effective targets and programmes for lung adenocarcinoma therapy in the clinic.