scholarly journals Determining Levels of Biological Geometric Information at Polygonal Shape Patterns

2021 ◽  
Author(s):  
Philipp von Bülow ◽  
Juan Lopez-Sauceda ◽  
Jose Gerardo Carrillo-Gonzalez ◽  
Carlos Ortega-Laurel ◽  
Gerardo Abel Laguna-Sánchez ◽  
...  
Keyword(s):  
Spatial Heterogeneity ◽  
Shannon Entropy ◽  
Experimental Results ◽  
Measuring System ◽  
Random Polygons ◽  
Statistical Heterogeneity ◽  
Ecological Patterns ◽  
Entropy Parameter ◽  
Geometrical Information ◽  
Polygonal Shape

Based on a measuring system to determine the statistical heterogeneity of individual polygons we propose a method to use polygonal shape patterns as a source of data in order to determine the Shannon entropy of biological organizations. In this research, the term entropy is a particular amount of data related with levels of spatial heterogeneity in a series of different geometrical meshes and sets of random polygons. We propose that this notion of entropy is important to measure levels of information in units of bits, measuring quantities of heterogeneity in geometrical systems. In fact, one important result is that binarization of heterogeneity frequencies yields a supported metric to determine geometrical information from complex configurations. Thirty-five geometric aggregates are tested; biological and non-biological, in order to obtain experimental results of their spatial heterogeneity which is verified with the Shannon entropy parameter defining low particular levels of geometrical information in biological samples. Geometrical aggregates (meshes) include a spectrum of organizations ranging from cell meshes to ecological patterns. Experimental results show that a particular range (0.08 and 0.27) of information is intrinsically associated with low rates of heterogeneity. We conclude it as an intrinsic feature of geometrical organizations in multi-scaling biological systems.

MAGNETOREOLOGICAL JOURNAL BEARING: EXPERIMENTAL RESULTS

2020 ◽  
Vol 3 ◽  
pp. 83-90
Author(s):  
A.S. FETISOV ◽  
V.O. TYURIN
Keyword(s):  
Experimental Study ◽  
Journal Bearing ◽  
Experimental Results ◽  
Measuring System ◽  
Information Measuring ◽  
Experimental Stand ◽  
Information Measuring System

The article presents the classification of magnetorheological devices. The classification of bearings of rotor machines is given. An experimental stand is described that includes a magnetorheological journal bearing. The information–measuring system of the experimental stand is presented. The results of experimental study is presented.

Profile Measurement of a Curved Workpiece by the Fuzzy Control of Sensor Positioning

1999 ◽  
Author(s):  
Masatake Shiraishi ◽  
Gongjun Yang
Keyword(s):  
Fuzzy Control ◽  
Control Algorithm ◽  
Experimental Results ◽  
Measuring System ◽  
Displacement Sensor ◽  
Profile Measurement ◽  
Laser Displacement Sensor ◽  
Inclination Angles ◽  
Fuzzy Control Algorithm ◽  
Sensor Positioning

Abstract A laser displacement sensor which has a resolution of 0.5 μm was used to determine the measurement of a curved workpiece profile in turning. This sensor is attached to a specially designed stage and is operated by three motors which are controlled by a fuzzy control algorithm. The experimental results show that the measuring system can be applied to workpieces having inclination angles of up to around 45°. The proposed measuring system has a practical measuring accuracy to within ten micrometers.

Design of a Constant Probing Force System for Profilometer

2014 ◽  
Vol 511-512 ◽  
pp. 301-306
Author(s):  
Shou Bin Liu ◽  
Zhan Ping Li
Keyword(s):  
High Precision ◽  
Voice Coil Motor ◽  
Experimental Results ◽  
Measuring System ◽  
Core Component ◽  
Force System ◽  
The Core ◽  
Displacement Measurements

The core component of profilometer is a stylus displacement measuring system, whose resolution reaches nanoscale. Since the stylus tip is very small, a variation on probing force has a great impact on the results of high-precision displacement measurements. In this paper, a special flat rectangular voice coil motor is designed to realize a constant probing force for the stylus displacement measuring system. Experimental results show the probing force can be adjusted from 5mg to 1000mg and the resolution can reach 5mg.

The Design of Temperature Measuring System Based on ARM

2013 ◽  
Vol 325-326 ◽  
pp. 899-902
Author(s):  
Jin Ge Sang ◽  
Guo Li Yu ◽  
Ya Nan Wang ◽  
Jun Zhang
Keyword(s):  
Software Design ◽  
Digital Signal ◽  
Temperature Data ◽  
Experimental Results ◽  
System Stability ◽  
Measuring System ◽  
Temperature Measuring ◽  
New Type ◽  
The Way

t gives a new type of Temperature Measuring System equipped with Samsung S3C2410. Chip DS18B20 is responsible for collecting temperature data, which was transmitted to the chip of S3C2410 in the way of digital signal. The hardware composition and software design of the system were discussed in detail. The experimental results indicate that the design improves the system stability and reliability.

Studies on the Optical Measuring System for Grape Stem Diameter

2014 ◽  
Vol 568-570 ◽  
pp. 65-70
Author(s):  
Ming Jun Wang ◽  
Jun Zhou
Keyword(s):  
Continuous Measurement ◽  
High Accuracy ◽  
Stem Diameter ◽  
Experimental Results ◽  
Measuring System ◽  
Stem Segment ◽  
Physiological Disorders ◽  
Optical Measuring ◽  
Periodic Data

This study presented a novel non-contact optical measuing method for grape stem diameter in fields. The main algorithm contained 3 steps: saperation of the stem from background, determination of the stem segment, and the computation of stem diameter. The experiments conducted in field not only validated the effectiveness, but also proved the high accuracy of the optical measuring system. And our further experimental results showed that the continuous measurement of grape stem diameter can provide periodic data for the analysis of physiological disorders in grapes.

Design and Validation of Sensor Balance for Propeller Experiment

2014 ◽  
Vol 496-500 ◽  
pp. 652-656
Author(s):  
Jun Jiao ◽  
Bi Feng Song ◽  
Yu Gang Zhang
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Experiment ◽  
Experimental Results ◽  
Measuring System ◽  
Virtual Instruments ◽  
Static Calibration ◽  
Two Component ◽  
Thrust And Torque ◽  
Measuring Force

This paper proposes a new two-component sensor balance to measure the thrust and torque of the propeller. Its principles of measuring force were derived and the procedures of balance measuring system were also provided according to the virtual instruments. The sensor balance was calibrated through the ground static calibration bench to verify its accuracy. And a ground static thrust experiment on a one-meter sized propeller model was carried out. By comparison, the experimental results of adopting the designed sensor balance basically tally with those of wind tunnel experiment, which proves that this sensor balance can be used in propeller experiments.

Time Discriminating Design for High Precision Pulsed TOF Laser Rangefinder

2011 ◽  
Vol 105-107 ◽  
pp. 1951-1956
Author(s):  
Dong Qing Shen ◽  
Jian Yong Chen ◽  
Wan Cai Li ◽  
Hong Jiang ◽  
Zhen Yu Li
Keyword(s):  
Experimental Evidence ◽  
High Precision ◽  
Input Signal ◽  
High Performance ◽  
Low Cost ◽  
Threshold Value ◽  
Experimental Results ◽  
Measuring System ◽  
Laser Rangefinder ◽  
Constant Fraction Discriminator

The purpose of a time discriminator is to decide when the input is something you are interested in. It does this by putting out a logic pulse when the input signal meets an adjustable threshold value. A low cost high performance constant fraction discriminator (CFD) for laser rangefinder using pulsed TOF (time of flight) is proposed with the accuracy been improved. The theory of CFD is deduced and discussed and a distance measuring system has been established and experimental evidence is presented to show the feasibility of solving the time walking error problem to amend the precision and improving the environmental applicability, the distance error of +/-0.5mm was observed in the lab condition. The advantages of this instrument are highlighted and the experimental results are presented.

A Study on Velocity Decay of φ6mm Tungsten Ball Fragment

2014 ◽  
Vol 1042 ◽  
pp. 154-158
Author(s):  
Chun Lin Yi ◽  
De Ren Kong ◽  
Yi Zhao Li ◽  
Li Ping Li ◽  
Jin Qiu Zhang ◽  
...  
Keyword(s):  
High Speed ◽  
Least Square Method ◽  
Least Square ◽  
Experimental Results ◽  
Measuring System ◽  
Low Speed ◽  
Velocity Decay ◽  
Velocity Attenuation ◽  
Attenuation Models ◽  
Velocity Measuring

In order to explore the velocity attenuation law and model of φ6mm tungsten ball fragment, theory analysis combined with tests is employed to study its velocity experimental results. First of all, a fragment velocity measuring system including 12 groups of cutting device is established. Then the attenuation experiments of φ6mm tungsten ball fragment in high speed and low speed velocity are performed by the measuring system. Based on the least-square method, MATLAB software is adopted to analysis the experimental data and obtained the high speed and low speed velocity attenuation models. The results show that φ6mm tungsten ball fragment speed attenuation coefficient is consistent in high speed and low. Thus, the analysis on velocity experimental results verifies that the established model is reasonable.

LabVIEW8.6-Based Temperature Monitoring System for Generator Bearing

2013 ◽  
Vol 373-375 ◽  
pp. 884-887
Author(s):  
Qin Chun Hu ◽  
Peng Hu
Keyword(s):  
Monitoring System ◽  
Virtual Instrument ◽  
Engineering Application ◽  
High Accuracy ◽  
Experimental Results ◽  
Good Stability ◽  
Measuring System ◽  
Software Implementations ◽  
Instrument Technology ◽  
Filtering Effect

A generator bearing temperature measuring system is designed, based on the LabVIEW8.6 and virtual instrument technology, in this paper. The hardware and software implementations of the system are introduced. The system is tested and analyzed both in algorithm of linearity and filtering effect. The experimental results show that the proposed system has good characters of good stability and high accuracy, which are valuable in engineering application.

scholarly journals Application of Positional Entropy to Fast Shannon Entropy Estimation for Samples of Digital Signals

Entropy ◽  
2020 ◽  
Vol 22 (10) ◽  
pp. 1173
Author(s):  
Marcin Cholewa ◽  
Bartłomiej Płaczek
Keyword(s):  
Shannon Entropy ◽  
State Of The Art ◽  
Large Data ◽  
Experimental Results ◽  
New Method ◽  
Computational Experiments ◽  
Digital Signals ◽  
Theoretical Concepts ◽  
Entropy Estimation

This paper introduces a new method of estimating Shannon entropy. The proposed method can be successfully used for large data samples and enables fast computations to rank the data samples according to their Shannon entropy. Original definitions of positional entropy and integer entropy are discussed in details to explain the theoretical concepts that underpin the proposed approach. Relations between positional entropy, integer entropy and Shannon entropy were demonstrated through computational experiments. The usefulness of the introduced method was experimentally verified for various data samples of different type and size. The experimental results clearly show that the proposed approach can be successfully used for fast entropy estimation. The analysis was also focused on quality of the entropy estimation. Several possible implementations of the proposed method were discussed. The presented algorithms were compared with the existing solutions. It was demonstrated that the algorithms presented in this paper estimate the Shannon entropy faster and more accurately than the state-of-the-art algorithms.

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