18,773,686 research outputs found
Postbloom Fruit Drop (PFD) Identification and Management
No full textThis two-sided ID card is ideal for growers working in the field trying to identify or manage postbloom fruit drop (PFD) in citrus. The ID card includes photos of blooms affected by PFD and photos of healthy blooms for comparison. The card also includes facts and tips for managing PFD. Written by Megan M. Dewdney, Natalia A. Peres, and Jamie D. Burrow, and published by the UF Department of Plant Pathology, July 2015.
PP318/PP318: Postbloom Fruit Drop (PFD) Identification and Management (ufl.edu
Postbloom Fruit Drop (PFD) Identification and Management
No full textThis two-sided ID card is ideal for growers working in the field trying to identify or manage postbloom fruit drop (PFD) in citrus. The ID card includes photos of blooms affected by PFD and photos of healthy blooms for comparison. The card also includes facts and tips for managing PFD. Written by Megan M. Dewdney, Natalia A. Peres, and Jamie D. Burrow, and published by the UF Department of Plant Pathology, July 2015.
PP318/PP318: Postbloom Fruit Drop (PFD) Identification and Management (ufl.edu
Postbloom Fruit Drop (PFD) Identification and Management
No full textThis 2-page publication is a minor revision written by Megan M. Dewdney, Natalia A. Peres, and Jamie D. Burrow, and published by the Plant Pathology Department, July 2019.
PP318/PP318: Postbloom Fruit Drop (PFD) Identification and Management (ufl.edu
Inhoffen’s Tee, Rote Packung 3/4 Pfund 1.50, Blaue Packung 1/4 Pfd. 1.-, Braune Packung 1/4 Pfd -.75
No full textINHOFFEN’S TEE, ROTE PACKUNG 3/4 PFUND 1.50, BLAUE PACKUNG 1/4 PFD. 1.-, BRAUNE PACKUNG 1/4 PFD -.75
Inhoffen’s Tee, Rote Packung 3/4 Pfund 1.50, Blaue Packung 1/4 Pfd. 1.-, Braune Packung 1/4 Pfd -.75 ( -
Analytical formulas of PFD and PFH calculation for systems with nonconstant failure rates
No full text Most analytical formulas developed for the PFD and PFH calculation assume a constant failure rate. This assumption does not necessarily hold for system components that are affected by wear. This article presents methods of analytical calculations of PFD and PFH for an M-out-of-N redundancy architecture with nonconstant failure rates and demonstrates its application in a simple case study. The method for PFD calculation is based on the ratio between cumulative distribution functions and includes forecasting of PFD values with a possibility of update of failure rate function. The approach for the PFH calculation is based on simplified formulas and the definition of PFH. In both methods, a Weibull distribution is used for characteristics of the system behavior. The PFD and PFH values are obtained for low, moderate and high degradation effects and compared with the results of exact calculations. Presented analytical formulas are a useful contribution to the reliability assessment of M-out-of-N systems. </jats:p
摄动有限差分(PFD)方法的数值计算
No full text利用数值摄动的思想发展了对流扩散(CD)方程的摄动有限差分(PFD)格式，局部线化可获得摄动准确解(PENS)格式。把格式中的指数函数按网格雷诺数的幂级数展开，能够给出PENS格式的各阶近似，即各阶PFD格式。文中构造了一维CD方程的PENS及二阶PFD格式以及二维CD方程的二阶PFD格式，并利用二阶精度的PFD格式计算了一维CD方程、方腔流动和前、后台阶绕流流动等算例。计算给出了准确度较高的数值结果
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