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PROGRAMMABLE INDUCTANCE AND CAPACITANCE GENERATOR
Hua, Shang Qing,Hua, Wu Li,Sheng, Qu Yan,Jian, Ma Huai 대한전자공학회 1992 HICEC:Harbin International Conference on Electroni Vol.1 No.1
This paper introduces an impedance converter principle of simulated pure inductance and capacitance by using operational amplifiers, in addition, it provides the circuitry configurations according to this principle. The generator can produce equivalent inductance from 0.1H to 6553500H or equivalent capacitance from 10^(-10) F to 65535 × 10^(-7) by programming control. Its circuit is very simple, this generator can be programmed control conveniently and integrated easily. It especially has certain advantages in simulating large inductance or capacitance and programming control.
ON SOME NEW NONLINEAR RETARDED INTEGRAL INEQUALITIES WITH ITERATED INTEGRALS AND THEIR APPLICATIONS
Ma, Qing-Hua,Pecaric, Josip Korean Mathematical Society 2008 대한수학회지 Vol.45 No.2
Some new nonlinear retarded integral inequalities of Gronwall-like type are established, which mainly generalized some results given by Cho, Dragomir and Kim (J. Korean Math. Soc. 43 (2006), No.3, pp. 563-578) and can be used in the analysis of various problems in the theory of certain classes of differential equations and integral equations. Applications examples are also indicated.
On some new nonlinear delay and weakly singular integral inequalities
Qing-hua Ma,L.Debnath 한국전산응용수학회 2008 Journal of applied mathematics & informatics Vol.26 No.5
This paper deals with some new nonlinear delay and weakly singular integral inequalities of Gronwall-Bellman type. These results generalize the inequalities discussed by Xiang and Kuang [19]. Several other inequalities proved by Medve\v d [15] and Ou-Iang [17] follow as special cases of this paper. This work can be used in the analysis of various problems in the theory of certain classes of differential equations, integral equations and evolution equations. A modification of the Ou-Iang type inequality with delay is also treated in this paper.
Ma, Qing-Hua,Pecaric, Josip Korean Mathematical Society 2008 대한수학회지 Vol.45 No.1
Some new explicit bounds on the solutions to a class of new nonlinear retarded Volterra-Fredholm type integral inequalities in two independent variables are established, which can be used as effective tools in the study of certain integral equations. Some examples of application are also indicated.
ON SOME NEW NONLINEAR DELAY AND WEAKLY SINGULAR INTEGRAL INEQUALITIES
Ma, Qing-Hua,Debnath, L. Korean Society of Computational and Applied Mathem 2008 Journal of applied mathematics & informatics Vol.26 No.5
This paper deals with some new nonlinear delay and weakly singular integral inequalities of Gronwall-Bellman type. These results generalize the inequalities discussed by Xiang and Kuang [19]. Several other inequalities proved by $Medve{\check{d}}$ [15] and Ou-Iang [17] follow as special cases of this paper. This work can be used in the analysis of various problems in the theory of certain classes of differential equations, integral equations and evolution equations. A modification of the Ou-Iang type inequality with delay is also treated in this paper.
Qing-Hua Ma,Josip Pecaric 대한수학회 2008 대한수학회지 Vol.45 No.1
Some new explicit bounds on the solutions to a class of new nonlinear retarded Volterra-Fredholm type integral inequalities in two independent variables are established, which can be used as effective tools in the study of certain integral equations. Some examples of application are also indicated. Some new explicit bounds on the solutions to a class of new nonlinear retarded Volterra-Fredholm type integral inequalities in two independent variables are established, which can be used as effective tools in the study of certain integral equations. Some examples of application are also indicated.
On some new nonlinear retarded integral inequalities with iterated integrals and their applications
Qing-Hua Ma,Josip Pecaric 대한수학회 2008 대한수학회지 Vol.45 No.2
Some new nonlinear retarded integral inequalities of Gronwall- like type are established, which mainly generalized some results given by Cho, Dragomir and Kim (J. Korean Math. Soc. 43 (2006), No. 3, pp. 563–578) and can be used in the analysis of various problems in the theory of certain classes of differential equations and integral equations. Applications examples are also indicated. Some new nonlinear retarded integral inequalities of Gronwall- like type are established, which mainly generalized some results given by Cho, Dragomir and Kim (J. Korean Math. Soc. 43 (2006), No. 3, pp. 563–578) and can be used in the analysis of various problems in the theory of certain classes of differential equations and integral equations. Applications examples are also indicated.
Ma Wei Qing,Zhao Dan Hua,Cheng Huang Zuo,Wang Si Bo,Yang Ji,Hong Xia Cui,Lu Ming Yuan,Wu Hong Zhi,Xu Li,Liu Guo Jun 아세아·태평양축산학회 2021 Animal Bioscience Vol.34 No.3
Objective: The aim of this study was to investigate the effects of Enteromorpha powder supplementation on reproduction-related hormones and genes in the late laying period of Zi geese. Methods: A total of 312 (1-year-old) Zi geese with similar laying rate were randomly divided into 2 groups with 6 replicates each, each with 21 female geese and 5 male geese. The control group was fed with a basal diet and the test group was fed with a diet containing 3% Enteromorpha powder. The trial period lasted for 7 weeks. Results: Our results showed that the laying rate was improved in the test group at each week of trial (p<0.01), and the levels of estradiol in serum and prolactin in ovary were increased compared with the control group (p<0.05). Conclusion: Based on above results, Enteromorpha powder supplementation at 3% could promote reproductive performance during the late laying period of Zi geese. Objective: The aim of this study was to investigate the effects of Enteromorpha powder supplementation on reproduction-related hormones and genes in the late laying period of Zi geese.Methods: A total of 312 (1-year-old) Zi geese with similar laying rate were randomly divided into 2 groups with 6 replicates each, each with 21 female geese and 5 male geese. The control group was fed with a basal diet and the test group was fed with a diet containing 3% <i>Enteromorpha</i> powder. The trial period lasted for 7 weeks.Results: Our results showed that the laying rate was improved in the test group at each week of trial (p<0.01), and the levels of estradiol in serum and prolactin in ovary were increased compared with the control group (p<0.05).Conclusion: Based on above results, <i>Enteromorpha</i> powder supplementation at 3% could promote reproductive performance during the late laying period of Zi geese.
ON THE DISCREPANCY OF CORONAL MAGNETIC FIELDS IN SOLAR OPTICS AND RADIO
MA YUE-HuA,LI XIAO-QING The Korean Astronomical Society 1996 Journal of The Korean Astronomical Society Vol.29 No.suppl1
It is analysed the discrepancy about the coronal magnetic field between solar optic and solar radio using magnetic fibril concept with filling factor and fractal structure model. The magnetic field of $\~$ 100 G considered in solar optics is mean value in a large scale, and that of $\~$1000 G in solar should be the value of fine structures inside 'macro' loop.