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Two-stage Gradient-based Recursive Estimation for Nonlinear Models by Using the Data Filtering
Yan Ji,Zhen Kang,Chen Zhang 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.8
This paper considers the parameter estimation problem of a two-input single-output Hammerstein finite impulse response system with autoregressive moving average noise. Applying the data filtering technique, the inputoutput data is filtered and the original system with autoregressive moving average noise is changed into the system with moving average noise. Then, based on the key term separation technique, the filtered system is decomposed into two subsystems: one subsystem contains the unknown parameters in the nonlinear block, the other contains the unknown parameters in the linear dynamic block and the noise model. A filtering based multi-innovation stochastic gradient algorithm is presented for Hammerstein finite impulse response systems. The simulation results confirm that the proposed algorithm is effective in estimating the parameters of two-input single-output Hammerstein finite impulse response systems.
Yanjie Zhang,Ruiqing Chu,Zhi-Jun Xu,Qian Chen,Yong Liu,Guangchao Zhang 한국물리학회 2012 Current Applied Physics Vol.12 No.1
(Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics doped with Li2CO3 and Bi2O3 as sintering aids were manufactured, and their micro structural, dielectric and piezoelectric properties were investigated. All specimens could be well sintered at a low-temperature of 1080 ℃. The bulk density of the specimens doped with a small amount of Li2CO3 was enhanced. The dielectric and piezoelectric properties of ceramics were investigated with different amounts of Li2CO3 substitutions. High electrical properties of d33 ¼ 167 pC/N,kp ¼ 0.34, Pr ¼ 40 mC/cm2 and Ec ¼ 38 kV/cm were obtained from the specimen containing 0.1 mol% of Li2CO3 sintered at 1080 ℃.
The Realization of Connected Component Detector Using CNN Theories
Yanji, Su,Song, Yu Qing 대한전자공학회 1992 HICEC:Harbin International Conference on Electroni Vol.1 No.1
This paper realizes the one cellular hardware circuit on the basis of theories of Cellular Neural Network, and Connected Component Detector with nine cells with the help of one cellular circuit which is basic unit.
( Yanjie Liu ),( Longfei Chen ),( Qiaohong Xie ),( Xi Yu ),( Anqing Duan ),( Yamin Lin ),( Biyun Xiang ),( Xiaoran Hao ),( Wanwan Chen ),( Xudong Zhu ) 한국미생물생명공학회(구 한국산업미생물학회) 2019 Journal of microbiology and biotechnology Vol.29 No.10
The fungal products dibenzodioxocinones promise a novel class of inhibitors against cholesterol ester transfer protein (CEPT). Knowledge as to their biosynthesis is scarce. In this report, we characterized four more dibenzodioxocinones, which along with a previously described member pestalotiollide B, delimit the dominant spectrum of secondary metabolites in P. microspora. Through mRNA-seq profiling in gα1Δ, a process that halts the production of the dibenzodioxocinones, a gene cluster harboring 21 genes including a polyketide synthase, designated as pks8, was defined. Disruption of genes in the cluster led to loss of the compounds, concluding the anticipated role in the biosynthesis of the chemicals. The biosynthetic route to dibenzodioxocinones was temporarily speculated. This study reveals the genetic basis underlying the biosynthesis of dibenzodioxocinone in fungi, and may facilitate the practice for yield improvement in the drug development arena.
Yanjie Tang,Jiandong Yin 대한수학회 2020 대한수학회보 Vol.57 No.1
The aim of this paper is to show that for the one-sided symbolic system, there exist an uncountable distributively chaotic set contained in the set of irregularly recurrent points and an uncountable distributively chaotic set in a sequence contained in the set of proper positive upper Banach density recurrent points.
Output Feedback Stabilization for a Class of Cascade Nonlinear ODEPDE Systems
Yanjie Chang,Tongjun Sun,Xianfu Zhang,Xiandong Chen 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.7
In this paper, the output feedback stabilization problem is studied for a class of cascade nonlinear ODEPDE systems. The nonlinear terms of ODE-subsystem are assumed to be bounded by a known constant multiplied by unmeasured states, and PDE-subsystem is a diffusion equation. Especially, the unstable diffusion equation is considered. Based on the low gain observer and a series of transformations, the output feedback stabilization problem is converted into designing proper gain parameters. Furthermore, the stability of the closed-loop system is analyzed by Lyapunov theorem. Finally, two numerical examples are given to demonstrate the effectiveness of the proposed control strategy.
Yanjie Zhang,Kyoungmin Noh,송욱 한국한의학연구원 2019 Integrative Medicine Research Vol.8 No.2
Background: This systematic review was performed to investigate the effects of Chinese herbal nedicine (CHM) on cognitive function and activity of daily living (ADL) in individuals with Alzheimer's disease. Methods: Five electronic databases (Medline, Embase, Cinahl, PsycArticles, and CNKI) were searched from inception to January 2019. Randomized controlled trials (RCTs) assessing the effect of CHM on cognition and activity of daily living in adults with Alzheimer's disease were included. We pooled the effects size using the Comprehensive Meta-Analysis Software. Cochrane risk of bias tool was used to evaluate the study quality. Results: Twenty-five RCTs (1855 individuals with AD) were included in this review. Overall findings of this meta-analysis indicated that CHM improved the cognitive function (SMD = 0.66, 95% CI [0.44, 0.89], I2 = 77.9%, p < 0.001) and ADL (SMD = 0.38, 95% CI [0.25, 0.49], I2 = 35.3%, p < 0.001) compared with conventional drugs. No publication biases were observed on both cognitive function and ADL. Conclusion: CHM may have potential effects for improving cognitive function and ADL for individuals with AD compared with conventional drug therapies. However, the evidence is limited because of high risk of bias of the included trials.
How Household Roles Influence Individuals’ Travel Mode Choice under Intra-household Interactions?
Yanjie Ji,Yang Liu,Qiyang Liu,Baohong He,Yu Cao 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.11
The household is usually an essential element for activity-based travel decision-making of individuals. From the perspective of household context, activities are often allocated to individuals based on their household roles, thereby affecting individuals’ travel behavior. By defining the household role using spatial-temporal constraints which are associated with individual activities and household activities, this paper investigates the travel mode choice of individuals considering the effect of different household roles. The descriptive statistics of the household roles and their corresponding travel mode choice are presented using the data from Kunming, China. The statistical results show that the modal splits between females and males perform a significant difference in the same household roles. Furthermore, the travel mode choice of females and males are estimated separately using multinomial logistic regression model. The results show that those who face more space-time constraints associated with household tasks are less willing to travel by car. While with the increase of commuting constraints, household heads, especially female-heads, tend to use car to meet the travel demands of household activity. Besides, individuals’ age, education level, the number of cars and bikes in household also have a significant impact on travel mode choices of individuals.
\boldmath$(\mathcal{V},\mathcal{W},\mathcal{Y},\mathcal{X})$-Gorenstein complexes
Yanjie Li,Renyu Zhao 대한수학회 2024 대한수학회지 Vol.61 No.3
Let $\mathcal{V}$, $\mathcal{W}$, $\mathcal{Y}$, $\mathcal{X}$ be four classes of left $R$-modules. The notion of $(\mathcal{V, W, Y, X})$-Gorenstein $R$-complexes is introduced, and it is shown that under certain mild technical assumptions on $\mathcal{V}$, $\mathcal{W}$, $\mathcal{Y}$, $\mathcal{X}$, an $R$-complex $\bm{M}$ is $(\mathcal{V, W, Y, X})$-Gorenstein if and only if the module in each degree of $\bm{M}$ is $(\mathcal{V, W, Y, X})$-Gorenstein and the total Hom complexs Hom$_R(\bm{Y},\bm{M})$, Hom$_R(\bm{M},\bm{X})$ are exact for any $\bm{Y}\in\widetilde{\mathcal{Y}}$ and any $\bm{X}\in\widetilde{\mathcal{X}}$. Many known results are recovered, and some new cases are also naturally generated.