scholarly journals The effect of temperature compensation on the circadian rhythmicity of photosynthesis in Symbiodinium, coral-symbiotic alga

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Michal Sorek ◽  
Oren Levy
Keyword(s):  
Temperature Compensation ◽  
Circadian Rhythmicity ◽  
Effect Of Temperature ◽  
Symbiotic Alga

scholarly journals Temperature Compensation Method for Digital Cameras in 2D and 3D Measurement Applications

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3685 ◽  
Author(s):  
Marcin Adamczyk ◽  
Paweł Liberadzki ◽  
Robert Sitnik
Keyword(s):  
Temperature Compensation ◽  
Three Dimensional ◽  
Compensation Method ◽  
Effect Of Temperature ◽  
Calibration Model ◽  
Digital Cameras ◽  
Compensation Model ◽  
Camera Design ◽  
Compensation Approach ◽  
2D And 3D

This paper presents the results of several studies concerning the effect of temperature on digital cameras. Experiments were performed using three different camera models. The presented results conclusively demonstrate that the typical camera design does not adequately take into account the effect of temperature variation on the device’s performance. In this regard, a modified camera design is proposed that exhibits a highly predictable behavior under varying ambient temperature and facilitates thermal compensation. A novel temperature compensation method is also proposed. This compensation model can be applied in almost every existing camera application, as it is compatible with every camera calibration model. A two-dimensional (2D) and three-dimensional (3D) application of the proposed compensation model is also described. The results of the application of the proposed compensation approach are presented herein.

scholarly journals Temperature Compensation Method for Mechanical Base of 3D-Structured Light Scanners

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 362 ◽  
Author(s):  
Marcin Adamczyk ◽  
Paweł Liberadzki ◽  
Robert Sitnik
Keyword(s):  
Temperature Compensation ◽  
Structured Light ◽  
Three Dimensional ◽  
Compensation Method ◽  
Effect Of Temperature ◽  
3D Measurement ◽  
Significant Deterioration ◽  
Complex Issue ◽  
Additional Equipment ◽  
Thermal Chamber

The effect of temperature on three-dimensional (3D) structured light scanners is a very complex issue that, under some conditions, can lead to significant deterioration of performed measurements. In this paper, we present the results of several studies concerning the effect of temperature on the mechanical base of 3D-structured light scanners. We also propose a software compensation method suitable for implementation in any existing scanner. The most significant advantage of the described method is the fact that it does not require any specialized artifact or any additional equipment, nor access to the thermal chamber. It uses a simulation of mechanical base thermal deformations and a virtual 3D measurement environment that allows for conducting virtual measurements. The results from the verification experiments show that the developed method can extend the range of temperatures in which 3D-structured light scanners can perform valid measurements by more than six-fold.

scholarly journals Temperature Compensation for Conductivity-Based Phase Fraction Measurements with Wire-Mesh Sensors in Gas-Liquid Flows of Dilute Aqueous Solutions

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7114
Author(s):  
Philipp Wiedemann ◽  
Felipe de Assis Dias ◽  
Eckhard Schleicher ◽  
Uwe Hampel
Keyword(s):  
Temperature Effects ◽  
Temperature Compensation ◽  
Phase Distribution ◽  
Industrial Applications ◽  
Operating Conditions ◽  
Wire Mesh ◽  
Effect Of Temperature ◽  
Experimental Investigations ◽  
Fluid Temperature ◽  
Two Phase

Wire-mesh sensors are well-established scientific instruments for measuring the spatio-temporal phase distribution of two-phase flows based on different electrical conductivities of the phases. Presently, these instruments are also applied in industrial processes and need to cope with dynamic operating conditions increasingly. However, since the quantification of phase fractions is achieved by normalizing signals with respect to a separately recorded reference measurement, the results are sensitive to temperature differences in any application. Therefore, the present study aims at proposing a method to compensate temperature effects in the data processing procedure. Firstly, a general approach is theoretically derived from the underlying measurement principle and compensation procedures for the electrical conductivity from literature models. Additionally, a novel semi-empirical model is developed on the basis of electrochemical fundamentals. Experimental investigations are performed using a single-phase water loop with adjustable fluid temperature in order to verify the theoretical approach for wire-mesh sensor applications and to compare the different compensation models by means of real data. Finally, the preferred model is used to demonstrate the effect of temperature compensation with selected sets of experimental two-phase data from a previous study. The results are discussed in detail and show that temperature effects need to be handled carefully—not merely in industrial applications, but particularly in laboratory experiments.

Research of pH Value Temperature Compensation Module Based on the Least Squares Method

2014 ◽  
Vol 945-949 ◽  
pp. 2121-2125 ◽  
Author(s):  
Xue Liang Zhao ◽  
Yun Shi ◽  
Kang Li ◽  
Guang Hua Wei
Keyword(s):  
Least Squares ◽  
Temperature Compensation ◽  
Least Squares Method ◽  
Ph Value ◽  
Ph Sensor ◽  
Automatic Monitoring ◽  
Effect Of Temperature ◽  
Low Power Consumption ◽  
Ultra Low Power ◽  
Measurement Results

The high precise pH automatic monitoring measurement is designed based on MSC1210 MCU and pH sensor. To eliminate the effect of temperature on the measurement results, a pH value temperature compensation module is established using the least Squares Method to analyze the linear relationship between pH and voltage. The results show that, the automatic monitoring measurement possesses broad application prospects with the advantages of ultra-low power consumption, good stability and high precision.

Modeling of High Power Water Resistor Speed Control System of Wound Rotor Induction Motor

2015 ◽  
Vol 727-728 ◽  
pp. 746-751
Author(s):  
Qi Yu Yang ◽  
Xia Zhang ◽  
Tian Rui Chen
Keyword(s):  
Control System ◽  
Induction Motor ◽  
Temperature Compensation ◽  
Water Resistance ◽  
Speed Control ◽  
Effect Of Temperature ◽  
Temperature Changes ◽  
Speed Control System ◽  
Simulation Results ◽  
Rotor Winding

A variable value water resistor speed control system for rotor winding induction motor is introduced. On the basis of the structure about the water resistance and the governor principle, the steady-state mathematical model and the dynamic mathematical models are established. The effect of temperature changes on the resistance of the electrolyte solution is discussed, and temperature compensation is proposed. Simulation results show that the water resistance speed control system is feasible.

Temperature dependence of in vitro androgen production in testes from hibernating ground squirrels, Spermophilus lateralis

1987 ◽  
Vol 65 (12) ◽  
pp. 3020-3023 ◽  
Author(s):  
Brian M. Barnes ◽  
Paul Licht ◽  
Irving Zucker
Keyword(s):  
Ground Squirrel ◽  
Temperature Compensation ◽  
Laboratory Mouse ◽  
Ground Squirrels ◽  
The Body ◽  
Effect Of Temperature ◽  
Dependent Manner ◽  
Spermophilus Lateralis ◽  
Dose Dependent

The effect of temperature on the in vitro androgen secretion of testes from hibernating ground squirrels was measured in response to stimulation by luteinizing hormone (LH). We wished to determine whether hibernating ground squirrels can maintain responsiveness of gonads while at the low body temperatures of torpor. In gonads incubated at 32 °C, secretion of testosterone increased in a dose-dependent manner in response to ovine-LH or ground squirrel pituitary homogenate. This responsiveness was reduced at 20 and 9 °C and absent at 5 °C, the temperature that most closely approximates the body temperature of torpid ground squirrels. This temperature sensitivity was similar to that in the nonhibernating laboratory mouse. Superfusion of ground squirrel testes revealed a lag of testosterone secretion in response to LH and, additionally, an ability of testes to secrete testosterone after being only briefly exposed to ovine-LH while at 5 °C. These results provide evidence against a hypothesis of temperature compensation that would allow continued testis function during torpor, and support a previous study which indicated that gonadal growth is restricted to intervals of normothermy during and after the hibernation season.

Compensating for temperature variations in time-lapse electrical resistivity difference imaging

Geophysics ◽  
2010 ◽  
Vol 75 (4) ◽  
pp. WA51-WA59 ◽  
Author(s):  
Kevin Hayley ◽  
L. R. Bentley ◽  
A. Pidlisecky
Keyword(s):  
Electrical Resistivity ◽  
Temperature Compensation ◽  
Time Lapse ◽  
Equivalent Model ◽  
Effect Of Temperature ◽  
Temperature Variations ◽  
Standard Temperature ◽  
Data Correction ◽  
Correction Terms ◽  
Resistance Data

Variations in temperature during time-lapse electrical resistivity imaging (ERI) surveys introduce changes in electrical conductivity (EC). When the goal of the time-lapse ERI survey is to image changes in EC due to changes in saturation or pore water salinity, compensation must be made for the effect of temperature variations. A temperature-compensation method can approximate time-lapse ERI data with the effect of temperature variations removed. First uncompensated ERI data are inverted. The inversion model then is adjusted to a standard temperature image. Forward simulations are performed using the uncompensated inversion and the standard temperature equivalent model. The temperature-compensated simulated resistance data are subtracted from the uncompensated simulated resistance data, forming data correction terms. The data correction terms then are subtracted from the measured data to yield temperature-compensated data. Using the temperature-compensated data, inversions have been carried out on two synthetic data sets and a field example. Differencing two temperature-compensated data inversions is found to be superior to differencing two postinversion standard temperature equivalent images. Temperature compensation on the data allows temperature corrections to be applied to time-lapse difference inversion schemes and hydrogeophysical inversion where postinversion temperature-correction methods are not easily applied.

Sign in / Sign up

Export Citation Format

Share Document