In the Ziegler-Nichols' s method of reaction curve,the proportional gain should be calculated as an inverse relation of the plant steady-state gain. One of the reasons behind this is to avoid an excessively high l...In the Ziegler-Nichols' s method of reaction curve,the proportional gain should be calculated as an inverse relation of the plant steady-state gain. One of the reasons behind this is to avoid an excessively high loop gain, which can jeopardize many required characteristics of the closed loop. However, many reports, scientific papers and books have been neglecting such gain compensation in the tuning formulae.This brief presents a comprehensive discussion about such uncompensated tuning rules. The main paper finding is that either the stability margin or the disturbance rejection is reduced in this case. A theoretical analysis is performed to obtain the main result. Moreover, a consistent simulation study is also performed to show the impact of the lack of compensation on performance.展开更多
This study aimed to relate the social and obstetric risk factors presented by pregnant women who underwent high risk prenatal in a southern Brazil hospital unit. This is a quantitative research. The data collection wa...This study aimed to relate the social and obstetric risk factors presented by pregnant women who underwent high risk prenatal in a southern Brazil hospital unit. This is a quantitative research. The data collection was conducted from January to September 2012, where 12 high-risk pregnancies and nine companions with diversified social and obstetric conditions were seen. The analysis was by simple statistics. Pregnant women social profile results indicated that predominant age group was 31 to 40 years old;all had some degree of education;84% Catholic;75% of pregnant women were accompanied by someone of their choice during high risk prenatal care;and 50% of the choices were for her spouse;half of these pregnant women have a professional occupation. Obstetrics findings demonstrated that the majority of women were not planning on the pregnancy, only 17% started prenatal care in the first trimester, 42% had already presented risk in previous pregnancy, 58% of women were classified as high risk due to fetal abnormalities. Given these findings, it is clear that high-risk pregnancy as a period involving several factors, including social and obstetric that, when connected, can compromise the process of gestating for both the mother and the fetus.展开更多
Let （Zll, . . . , Z1N,... , Zml,. . . , ZmN, Wll,. . . , Wmm） be the coordinates in C^mN＋m2. In this note we prove the analogue of the Theorem of Moser in the case of the real-analytic submanifold M defined as foll...Let （Zll, . . . , Z1N,... , Zml,. . . , ZmN, Wll,. . . , Wmm） be the coordinates in C^mN＋m2. In this note we prove the analogue of the Theorem of Moser in the case of the real-analytic submanifold M defined as follows W=zz-t＋O（3）,where W ={wij}1≤ i,j≤ m and Z ={Zij}1≤i≤ m,1≤j≤N We prove that M is biholomorphically equiva-lent to the model W =zz-tif and only if is formally equivalent to it.展开更多
文摘In the Ziegler-Nichols' s method of reaction curve,the proportional gain should be calculated as an inverse relation of the plant steady-state gain. One of the reasons behind this is to avoid an excessively high loop gain, which can jeopardize many required characteristics of the closed loop. However, many reports, scientific papers and books have been neglecting such gain compensation in the tuning formulae.This brief presents a comprehensive discussion about such uncompensated tuning rules. The main paper finding is that either the stability margin or the disturbance rejection is reduced in this case. A theoretical analysis is performed to obtain the main result. Moreover, a consistent simulation study is also performed to show the impact of the lack of compensation on performance.
文摘This study aimed to relate the social and obstetric risk factors presented by pregnant women who underwent high risk prenatal in a southern Brazil hospital unit. This is a quantitative research. The data collection was conducted from January to September 2012, where 12 high-risk pregnancies and nine companions with diversified social and obstetric conditions were seen. The analysis was by simple statistics. Pregnant women social profile results indicated that predominant age group was 31 to 40 years old;all had some degree of education;84% Catholic;75% of pregnant women were accompanied by someone of their choice during high risk prenatal care;and 50% of the choices were for her spouse;half of these pregnant women have a professional occupation. Obstetrics findings demonstrated that the majority of women were not planning on the pregnancy, only 17% started prenatal care in the first trimester, 42% had already presented risk in previous pregnancy, 58% of women were classified as high risk due to fetal abnormalities. Given these findings, it is clear that high-risk pregnancy as a period involving several factors, including social and obstetric that, when connected, can compromise the process of gestating for both the mother and the fetus.
文摘Let （Zll, . . . , Z1N,... , Zml,. . . , ZmN, Wll,. . . , Wmm） be the coordinates in C^mN＋m2. In this note we prove the analogue of the Theorem of Moser in the case of the real-analytic submanifold M defined as follows W=zz-t＋O（3）,where W ={wij}1≤ i,j≤ m and Z ={Zij}1≤i≤ m,1≤j≤N We prove that M is biholomorphically equiva-lent to the model W =zz-tif and only if is formally equivalent to it.
