Precision Capacitor Divider Method for Measuring High Voltages

1959 ◽  
Vol 30 (11) ◽  
pp. 1022-1024 ◽  
Author(s):  
H. V. Larson ◽  
I. T. Myers
Keyword(s):  
Divider Method ◽  
Capacitor Divider

Fractal geometry of ammonoid sutures

Paleobiology ◽  
1995 ◽  
Vol 21 (3) ◽  
pp. 329-342 ◽  
Author(s):  
Timothy M. Lutz ◽  
George E. Boyajian
Keyword(s):  
Fractal Dimension ◽  
Fractal Geometry ◽  
Two Dimensional ◽  
Evolutionary Time ◽  
Linear Features ◽  
Divider Method ◽  
Richardson Method ◽  
Components Analysis ◽  
Box Method ◽  
Range Of Variation

Interior chamber walls of ammonites range from smoothly undulating surfaces in some taxa to complex surfaces, corrugated on many scales, in others. The ammonite suture, which is the expression of the intersection of these walls on the exterior of the shell, has been used to assess anatomical complexity. We used the fractal dimension to measure sutural complexity and to investigate complexity over evolutionary time and showed that the range of variation in sutural complexity increased through time. In this paper we extend our analyses and consider two new parameters that measure the range of scales over which fractal geometry is a satisfactory metric of a suture. We use a principal components analysis of these parameters and the fractal dimension to establish a two-dimensional morphospace in which the shapes of sutures can be plotted and in which variations and evolution of suture morphology can be investigated. Our results show that morphospace coordinates of ammonitic sutures correspond to visually perceptible differences in suture shape. However, three main classes of sutures (goniatitic, ceratitic, and ammonitic) are not unambiguously discriminated in this morphospace. Interestingly, ammonitic sutures occupy a smaller morphospace than other suture types (roughly one-half of the morphospace of goniatitic and ceratitic sutures combined), and the space they occupied did not change dimensions from the Jurassic to the late Cretaceous.We also compare two methods commonly used to measure the fractal dimension of linear features: the Box method and the Richardson (or divider) method. Both methods yield comparable results for ammonitic sutures but the Richardson method yields more precise results for less complex sutures.

High accuracy optical voltage transformer with digital output based on coaxial capacitor voltage divider

2017 ◽  
Vol 40 (13) ◽  
pp. 3824-3833
Author(s):  
Zhen-hua Li ◽  
Shuang Zhao
Keyword(s):  
Measurement Accuracy ◽  
Voltage Divider ◽  
Measurement Precision ◽  
Self Healing ◽  
Light Path ◽  
Stray Capacitance ◽  
Voltage Transformer ◽  
Digital Output ◽  
Capacitor Voltage ◽  
Capacitor Divider

The voltage transformer based on capacitor divider is susceptible to stray capacitance and Bi4Ge3O12 crystal is sensitive to temperature, which leads to the decrease of measurement precision. To solve these questions, a kind of temperature self-healing optical voltage transformer based on the coaxial capacitor is proposed in this paper. By using coaxial capacitor divider structure instead of the traditional capacitor divider structure, and using a reference light path to achieve the function of temperature self-healing, the measurement accuracy of the optical voltage transformer can be improved. The theoretical analysis, modeling and simulation of several key technologies of coaxial capacitance are presented. Simulation and experimental results show that the temperature self-healing optical voltage transformer based on coaxial capacitor structure meets the requirements of the 0.2 class accuracies.

scholarly journals Updates on the Mobile Divider and Its Use in Calabria Region to Monitor and Control Aethina tumida Infestation

2021 ◽  
Vol 11 (22) ◽  
pp. 10637
Author(s):  
Camilla Di Ruggiero ◽  
Ziad Mezher ◽  
Franco Mutinelli ◽  
Alessandra De Carolis ◽  
Naomi Pocci ◽  
...  
Keyword(s):  
Preliminary Data ◽  
Short Communication ◽  
Southern Italy ◽  
Aethina Tumida ◽  
Official Method ◽  
Small Hive Beetle ◽  
Inspection Method ◽  
Calabria Region ◽  
Divider Method ◽  
And Control

The small hive beetle (SHB), Aethina tumida was first detected in the Calabria and Sicily region (Southern Italy) in 2014. In this regard, a more effective and faster inspection method than the Official one (Ministry of Health) was tested to detect the beetle in the hive. In collaboration with Calabria beekeepers’ association, a “mobile divider”-based method was tested, in order to facilitate the detection of A. tumida and save time during hive inspection. In this short communication, we provide an update on the mobile divider technique and its related inspection procedure, which was first proposed and used in Calabria (Southern Italy) from 2014 to 2016. We report preliminary data concerning the number of detected SHBs and the time spent for their detection, based on the inspection of two apiaries in Calabria region, using both methods (official method and mobile divider method). The preliminary data presented here show that, on average, the mobile divider method seems to be able to recover a slightly higher number of beetles (0.9 adults) per inspected hive, in a shorter time (25 s).

A direct divider method for self-affine fractal profiles and surfaces

1997 ◽  
Vol 24 (16) ◽  
pp. 2099-2102 ◽  
Author(s):  
Angelo De Santis
Keyword(s):  
Divider Method
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