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Monitoring Enzymes Activity During Vermicomposting of Rural Garbage dosed with Composting Promoter
Chunji Jin,Mengmeng Zhao,Ping Yang 대전대학교 환경문제연구소 2012 환경문제연구소 논문집 Vol.16 No.-
The physical, chemical and biological prarameters during composting process of rural garbage with different dosage of composting promoter were monitored. The results indicated that the addition of 5‰ EM solution to rural garbage was beneficial to growth and reproduction of earthworms after 34 days of pre-composting and 35 days of vermicomposting. C/N ratio, NH₄+-N concentration, and the activity of urease, cellulose and sucrase in treatment sample of 5‰EM were lower than that of other groups, while the NO₃—N concentration was significantly higher than the other treatment groups. 본 연구에서는 물리, 화학, 생물적 처리과정 중 서로 다른 용량의 퇴비가 농촌쓰레기처리공정에서의 수치를 검측하였다. 그 결과, 농촌쓰레기의 5‰ EM 해결시, 지렁이의 생장에 유익했고 34일이 지나면 예비 비료화가 되고, 35일에는 벌레가 자랐다. 5‰ EM 처리 샘플의 C/N비, NH₄+-N농도, 활성화 우레아제, 섬유소와 삭카라아제는 다른 그룹보다 낮았지만 NO₃-N 농도는 다른 그룹보다 선명하게 높았다.
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LOCAL SYNCHRONIZATION OF MARKOVIAN NEURAL NETWORKS WITH NONLINEAR COUPLING
Chunji Li,Xiaotong Ren 한국전산응용수학회 2017 Journal of applied mathematics & informatics Vol.35 No.3
In order to react the dynamic behavior of the system more actually, it is necessary to solve the first problem of synchronization for Markovian jump complex network system in practical engineering problem. In this paper, the problem of local stochastic synchronization for Markovian nonlinear coupled neural network system is investigated, including nonlinear coupling terms and mode-dependent delays, that is less restriction to other system. By designing the Lyapunov-Krasovskii functional and applying less conservative inequality, we get a new criterion to ensure local synchronization in mean square for Markovian nonlinear coupled neural network system. The criterion introduced some free matrix variables, which are less conservative. The simulation confirmed the validity of the conclusion.
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Chunji Li,이상훈 대한수학회 2005 대한수학회지 Vol.42 No.4
In this paper, we consider the quartic moment problem suggested byCurto-Fialkowcite{CuF4}. Given complex numbers gamma equivgamma ^{(4)}:gamma _{00},gamma _{01},gamma _{10}, gamma_{02},gamma _{11},gamma _{20},gamma _{03}, gamma_{12},gamma _{21},gamma _{30},gamma _{04},gamma _{13},gamma_{22},gamma _{31},gamma _{40}, with gamma _{00}>0 andgamma _{ji}=bar{gamma}_{ij}, we discuss the conditions forthe existence of a positive Borel measure mu , supportedin the complex plane mathbb{C} such that gamma _{ij}=int bar{z}%^{i}z^{j}dmu (0leq i+jleq 4). We obtain sufficientconditions for flat extension of the quartic moment matrix M(2).Moreover, we examine the existence of flat extensions for nonsingular positive quartic moment matrices $M(2).
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Backward extensions of Bergman-type weighted shift
Chunji Li,Wentao Qi,Haiwen Wang 대한수학회 2020 대한수학회보 Vol.57 No.1
Let $m\in \mathbb{N}_{0}$, $p>1$ and $$\alpha ^{\left[ m,p\right] }\left( x\right) :\sqrt{x},\left\{ \sqrt{\frac{\left( m+n-1\right) p-\left( m+n-2\right) }{\left( m+n\right) p-\left( m+n-1\right) }}\right\} _{n=1}^{\infty }.$$ In this paper, we consider the backward extensions of Bergman-type weighted shift $W_{\alpha ^{\left[ m,p\right] }\left( x\right) }.$ We consider its subnormality, $k$-hyponormality and positive quadratic hyponormality. Our results include all the results on Bergman weighted shift $W_{\alpha \left( x\right) }$ with $m\in \mathbb{N}$ and $$\alpha \left( x\right) :\sqrt{x},\sqrt{\frac{m}{m+1}},\sqrt{\frac{m+1}{m+2}},\sqrt{\frac{ m+2}{m+3}},\ldots .$$
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Weak and quadratic hyponormality of 2-variable weighted shifts and their examples
Chunji Li 대한수학회 2017 대한수학회보 Vol.54 No.2
Recently, Curto, Lee and Yoon considered the properties (such as, hyponormality, subnormality, and flatness, etc.) for $2$-variable weighted shifts and constructed several families of commuting pairs of subnormal operators such that each family can be used to answer a conjecture of Curto, Muhly and Xia negatively. In this paper, we consider the weak and quadratic hyponormality of 2-variable weighted shifts $\left( W_{1},W_{2}\right) $. In addition, we detect the weak and quadratic hyponormality with some interesting 2-variable weighted shifts.
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ESTIMATING THE DOMAIN OF ATTRACTION OF HIV-1 SYSTEM BASED ON MOMENT METHOD
Chunji Li,Han Yao 한국전산응용수학회 2018 Journal of applied mathematics & informatics Vol.36 No.5
In this article, we discuss the domain of attraction of HIV-1 system by using the moment theory. First, the asymptotic stabilities of the equilibrium point of the system are given, and then we introduce how to use the moment method to estimate domain of attraction. Finally, one simulation shows the eectiveness of moment method.
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Moment approach to the target control problem for linear system
Chunji Li,Han Yao 한국전산응용수학회 2020 Journal of applied mathematics & informatics Vol.38 No.3
In this paper, we consider the target control problem for the linear systems by using the solution of the Hausdorff moment problem.
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Chunjie Zhao,Lu Bai,Huanxin Li,Fei Li,Chunhong Xin 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.12
A method involving depuration of 12 organochlorine pesticides (OCPs) and 7 heavy metals from Epimedium brevicornum Maxim was developed using supercritical fluid extraction (SPE). The pesticides in the study consisted of α, β-, γ-, and δ-Benzene hexachloride, Pentachloronitrobenzene (PCNB ), Pentachloroaniline (PCA), Heptachlor (HEPT), Methyl -pentachlorophenyl sulfide (MPCPS), pp'-DDE[1,1-dichloro-2, 2-bis (p-chlorophenyl) ethylene], op'-DDT [1,1,1- trichloro-2-(o-chlorophenyl)-2-(p-chlorophenyl)ethane], pp'-DDD [1,1-dichloro-2-2-bis(p-chlorophenyl)] ethane, pp'-DDT [1,1,1-trichloro-2,2-bis(p-chlorophenyl) ethane]. A series of experiments was conducted to optimize the final extraction conditions as following: pure CO2, extraction pressure of 15 Mpa, extration temperature of 60oC, extraction time of 10 min, flow rate at 55 kg/h. A GC method with electron capture detection was employed to determination of the OCPs, and an atomic absorption spectrometry (AAS) was designed for the determination of 7 heavy metals including of Pb, Cd, Cu, Fe, Zn, As, Hg in Epimedium brevicornum Maxim. A HPLC method was developed for the quantitative determination of active constituents. The SFE was used to remove the organochlorine pesticide and heavy metals from Epimedium brevicornum Maxim, receiving high decontamination rate of pesticide residue and low loss of active constituents.
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Weighted estimates for certain rough singular integrals
Chunjie Zhang 대한수학회 2008 대한수학회지 Vol.45 No.6
In this paper we shall prove some weighted norm inequalities of the form [수식] for certain rough singular integral T and maximal singular integral T*. Here u is a nonnegative measurable function on Rn and N denotes some maximal operator. As a consequence, some vector valued inequalities for both T and T* are obtained. We shall also get a boundedness result of T on the Triebel-Lizorkin spaces. In this paper we shall prove some weighted norm inequalities of the form [수식] for certain rough singular integral T and maximal singular integral T*. Here u is a nonnegative measurable function on Rn and N denotes some maximal operator. As a consequence, some vector valued inequalities for both T and T* are obtained. We shall also get a boundedness result of T on the Triebel-Lizorkin spaces.
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