http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Rahman, M.M.,Nakagawa, T.,Niimi, M.,Fukuyama, K.,Kawamura, O. Asian Australasian Association of Animal Productio 2011 Animal Bioscience Vol.24 No.12
An experiment was conducted to investigate the effects of calcium (Ca) fertilization on oxalate content in napiergrass (Pennisetum purpureum) and on some blood parameters of sheep. Re-growth napiergrass was grown with or without Ca fertilizer and offered to sheep. Eight sheep, divided into two groups of 4 animals each were used. Calcium-fertilized napiergrass was offered daily to the animals as experimental treatment, whereas without Ca-fertilized napiergrass was given to the animals as control. Results showed that there was a trend to lower soluble and total oxalate concentrations in Ca-fertilized grass than control. The Ca-fertilized grass contained (p<0.05) lower concentrations of K and Mg than control, though Ca fertilization had no affect (p>0.05) on Ca and Na concentrations in plants. Feeding of Ca-fertilized grass had no affect on the feed consumption, blood Mg level and daily gain of sheep. However, sheep fed control grass had lower (p<0.05) blood Ca level than sheep fed Ca-fertilized grass. Our findings suggest that Ca fertilization might minimize the negative effects of oxalate.
Rahman, M.M.,Nakagawa, T.,Niimi, M.,Fukuyama, K.,Kawamura, O. Asian Australasian Association of Animal Productio 2011 Animal Bioscience Vol.24 No.7
In order to determine whether oxalate from grasses affects feed intake, blood calcium (Ca) and other blood parameters of adult sheep, two feeding trials were conducted. In Trial 1, one group of sheep received guineagrass (0.47% soluble oxalate) and another group received setaria (1.34% soluble oxalate) for 28 d. In Trial 2, one group of sheep received guineagrass while another group received the same grass treated with an oxalic acid solution (at a rate of 30 g oxalic acid/kg dry matter of hay) for 72 d. All sheep received concentrate mixtures (0.5% of body weight) throughout the experiment. In both trials, it was observed that plasma Ca concentration (11.0-11.7 mg/dl) was significantly (p<0.05) lower in sheep fed high oxalate-containing grasses than in sheep fed low oxalate-containing grasses (12.4-13.7 mg/dl). No differences (p>0.05) were observed in concentrations of magnesium, phosphorus and parathyroid hormone in plasma between the feeding of low and high oxalate-containing grasses. In addition, no differences (p>0.05) were observed in roughage dry mater (DM) intake, total DM intake or body weight of sheep. This study suggests that sheep may consume oxalate-rich forage, but Ca bioavailability may decrease with increasing oxalate levels in the ration.
Study of Generator Control with H-Infinity Control Considering Distributed Generator
K. Yukita,G.Fukuyama,T.Hosoe,T.Matsumura,Y.Goto 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper describes a frequency control using of small-scale power systems is investigated. Utility grids are affected by load and photovoltaic generation fluctuations, which could result in frequency and voltage changes, thereby deteriorating the power quality. Therefore, it is necessary to suppress the effects of these fluctuations on the utility grids. To control a utility grid, we used the conventional proportional-integral controller and a Hinfinity controller, which is one of the recent control methods. Then, we compared and studied both the controls. From the results, it is confirmed that by using the H-infinity control device the frequency fluctuation of power systems can be suppressed when the load fluctuates.
Yuusuke YAMAGUCHI,A. Fukuyama,H. Nakajima,H. Higaki,K. Nakagome,K. Nemoto,M. Katano,M. Ichimura,S. Kakimoto,T. Cho 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
A wide-band radio-frequency (RF) probe system was newly constructed for the active diagnostic of the eigenmode formations in the ion-cyclotron range of frequencies in the GAMMA 10 tandem mirror. A bar-type antenna was installed in the peripheral region in the minimum-B anchor cell. A low-power RF pulse with the frequency sweep from 8 to 20 MHz is applied to the antenna. The waves excited in the plasma are detected with a magnetic probe. The excitation of eigenmodes is described by using the antenna-plasma-probe transfer function. The transfer function can be obtained from the antenna current signal and the magnetic probe signal. When the real and the imaginary part of the transfer function are plotted in the complex plane, the resultant curves are approximately circles, indicating an eigenmode formation. It is found that the several fast wave eigenmodes can be excited in the present experimental condition.