Statistical engine knock modelling and adaptive control

2008 ◽  
Vol 222 (3) ◽  
pp. 429-439 ◽  
Author(s):  
A A Stotsky
Keyword(s):  
Confidence Interval ◽  
Control Algorithm ◽  
Detection Threshold ◽  
Maximum Amplitude ◽  
Threshold Value ◽  
Statistical Hypothesis ◽  
Significance Level ◽  
Average Value ◽  
Control Concept ◽  
Knock Detection

A new statistical concept of the knock control of a spark ignition automotive engine is proposed. The control aim is associated with the statistical hypothesis test which compares the threshold value with the average value of the maximum amplitude of the knock sensor signal at a certain frequency. Achievement of the control aim implies the desired separation between the average value of the maximum amplitude and the target value and hence the desired probability of knock occurrence. This new control concept allows the control algorithm parameters to be connected to the probability of knock occurrence and customer-related data. The regulation error is defined as the difference between the actual and the desired values of the statistic utilized. A control algorithm which is used for minimization of the regulation error realizes a simple count-up—count-down logic. A new adaptation algorithm for the knock detection threshold is developed. The confidence interval method is used as the basis for adaptation. A knock detection threshold is presented using a confidence interval with a certain significance level. The adaptation is performed for an aged engine so that the significance level is the same for the new and the aged engines despite the fact that the detection threshold values are different. This, in turn, guarantees the same knock detection performance for new and aged engines. A simple statistical model which includes generation of the amplitude signals, threshold value determination, and a knock sound model is developed for evaluation of the control concept. The statistical knock audibility concept is associated with the outlier detection method and is used in this paper for knock audibility judgement. A Volvo six-cylinder prototype engine equipped with cylinder pressure and block vibration sensors was used in the experiments. An external microphone was used for the knock sound measurements.

POTRET PERILAKU RELIGIUS MAHASISWA UIN SAYARIF HIDAYATULLAH JAKARTA

Al-Risalah ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 126-148
Author(s):  
Ay Maryani
Keyword(s):  
Religious Behavior ◽  
Male And Female ◽  
Mean Values ◽  
Significance Level ◽  
Average Value ◽  
Environment Variable ◽  
Independent Variable ◽  
The Mean ◽  
Gender Factor ◽  
Level 2

This study describes the religious behavior of UIN Syarif Hidayatullah Jakarta students. The variables used are internal and external environment as independent variable and religious behavior as dependent variable. The internal environment variable consists of gender factor, (male and female). The external environmental variables comprise the faculty environment, the present resident and the place to grow. The present resident consist of dormitories, boarding houses and parents' homes and the place to grow consist of urban and rural environment. Religious behavior variables consist of habluminallah behavior and habluminannas behavior. Habluminallah's behavior measured by (1) knowledge of faith and worship, (2) attitudes toward faith and worship, and (3) practice of faith and worship. The habluminannas variable measured by (1) Islamic behavior for them self, like honest, discipline and good work / studyethics, trust and concern on legality, (2) Islamic behavior with others, like generous, cooperation, caring, respect to the people's rights and tolerance and (3) Islamic behavior for the natural surroundings, like love of nature and nature conservation efforts. The methodology used was (1) Statistical descriptive, (2) MANOVA (Multivariate Analysis of Variance) and (3) Independent sample t-test. The results showed the religious behavior UIN Syarif Hidayatullah Jakarta students has a very good category. This is indicated by the mean values for the behavior of haluminallah and habluminannas of 158.85 and 178.76,  espectively. The average value of habluminallah behaviour in the range of values "145-180" with the category of "very good" and habluminannas behavior in the range value "165-205" with the category "very good. Habluminallah and habluminannas behavior are different for each faculty. This is indicated by the significance level of Pillai Trace, Wilk Lambda, Hotelling Trace, Roy's Largest Root of 0.00 (<0.05). Habluminallah and habluminannas behavior are the same for respondents who live in dormitories, boarding houses, and parents' homes. This is indicated by the value of F test and significance at Wilk's Lambda respectively for 2.055 and 0.085 (>0.05). Habluminallah and habluminannas behaviors are similar for urban and rural respondents. This is known from the sig level. (2-tailed) for habluminallah and habluminannas behavior of 0.317 and 0.245 (> 0.05), respectively. Habluminallah and habluminannas behaviors are similar for male and female. This is known from the sig level. (2-tailed) for habluminallah and habluminannas behavior of 0.950 and 0.307 (> 0.05),respectively. The results of this study are expected to be used to develop university policies that can enhance the Islamic values of UIN Syarif Hidayatullah Jakarta.

Results of studying the dimensional accuracy of the bases of complete removable prostheses made using 3D printing and traditional technologies

2020 ◽  
pp. 34-39
Author(s):  
Vokulova Yu.A. Vokulova ◽  
E.N. Zhulev
Keyword(s):  
3D Printing ◽  
Traditional Method ◽  
Laser Scanning ◽  
Laser Scanner ◽  
Digital Technologies ◽  
Dimensional Accuracy ◽  
3D Printer ◽  
Significance Level ◽  
Average Value ◽  
The Difference

This article presents the results of studying the dimensional accuracy of the bases of complete removable prostheses made using a 3D printer and the traditional method. Bases of complete removable prostheses were made using an intraoral laser scanner iTero Cadent (USA) and a 3D printer Asiga Max UV (Australia). To study the dimensional accuracy of the bases of complete removable prostheses, we used the DentalCAD 2.2 Valletta software. The Nonparametric Wilcoxon W-test was used for statistical analysis of the obtained data. We found that the average value of the difference with the standard for bases made using digital technologies is 0.08744±0.0484 mm. The average value of the difference with the standard for bases made by the traditional method is 0.5654±0.1611 mm. Based on these data, we concluded that the bases of complete removable prostheses made using modern digital technologies (intraoral laser scanning and 3D printer) have a higher dimensional accuracy compared to the bases of complete removable prostheses made using the traditional method with a significance level of p<0.05 (Wilcoxon's W-test=0, p=0.031). Keywords: digital technologies in dentistry, digital impressions, intraoral scanner, 3D printing, ExoCAD, complete removable dentures.

PENGARUH KELAS IBU HAMIL TERHADAP PENGETAHUAN DAN SIKAP IBU TENTANG PEMERIKSAAN DAN PERAWATAN KEHAMILAN DI WILAYAH KERJA PUSKESMAS BATAM TAHUN 2016

2016 ◽  
Vol 1 (2) ◽  
pp. 61-70
Author(s):  
R.Oktaviance Simorangkir ◽  
Lilis Sumardiani
Keyword(s):  
Pregnant Women ◽  
Health Workers ◽  
Community Health Center ◽  
Average Score ◽  
Maternal Knowledge ◽  
Class Effect ◽  
Cross Sectional ◽  
Significance Level ◽  
Average Value ◽  
Total Range

In the Working Area of Pancur Batu Puskesmas class, pregnant women begin to be implemented in 2016, but still found the low knowledge of pregnant women about the ideal pregnancy examination and there are pregnant women who show unimportant attitude checking pregnancy to health workers. Goals : The purpose of this research is to know the influence of maternal class on pregnant mother's knowledge and attitude about pregnancy examination and treatment. Methods : The study used a quantitative method with cross sectional design. The population of 151 pregnant women in Pancur Batu Community Health Center and 132 of them (63 pregnant women who had attended pregnant mother class and 69 pregnant women who never attended maternal class) were used as samples. Data analysis using independent t test at significance level α = 0,05. Result : The results showed the total range of knowledge scores of mothers who had followed the class of pregnant women is 7-13 with an average value of 10.08 ± 1.82, while the total range of scores of mothers who never follow the pregnant women's class is 1-9 with an average value 4,97,1,94. There is a maternal class effect on maternal knowledge of examination and treatment of pregnancy (p <3,82. There is a maternal class effect on maternal attitudes about examination and treatment of pregnancy (p3.13, while the total range of maternal scores that never follow the class of pregnant women is 27-47 with an average value of 35 , 410.001). The total score of attitudes of mothers who have attended the class of pregnant women is 41-56 with an average score of 48.24 <0.001). Conclution : It is expected that the Health Office to schedule Pancur Batu Puskesmas to carry out pregnant women's classes regularly and carried out 2 periods a year. Pancur Batu Puskesmas is expected to maintain the quality of pregnant women's classes and counseling invites all pregnant women to follow the class of pregnant women.

scholarly journals Prevalence of hepatitis B and C seropositivity in pregnant women

2014 ◽  
Vol 48 (1) ◽  
pp. 89-96 ◽  
Author(s):  
Carla Natalina da Silva Fernandes ◽  
Michelly de Melo Alves ◽  
Michelly Lorrane de Souza ◽  
Gleyce Alves Machado ◽  
Gleiber Couto ◽  
...  
Keyword(s):  
Data Analysis ◽  
Hepatitis B ◽  
Confidence Interval ◽  
Pregnant Women ◽  
Exploratory Study ◽  
Maternity Hospital ◽  
Hospital Records ◽  
Significance Level

The aim of the study was to identify the prevalence of hepatitis B and C seropositivity in pregnant women attended in a public maternity hospital located in Catalao-GO from 2005 to 2009. Descriptive, exploratory study conducted through patients` hospital records. For data analysis, we used SPSS version 18.0. The confidence interval (CI) was calculated using the Person χ² test, considering a significance level of 5% (p <0.05). The prevalence of HBV was 5.64% and HCV 0.098%, predominantly in young pregnant women aged between 20 and 30 years old, single and in their first pregnancy.

scholarly journals Association between Adenoid-Nasopharyngeal Ratio and Tympanogram Width in Adenoid Hypertrophy Patients

2021 ◽  
Author(s):  
Muhammad Arif Sudianto Utama ◽  
Widodo Ario Kentjono ◽  
Haris Mayagung Ekorini
Keyword(s):  
Risk Factor ◽  
Pearson Correlation ◽  
Radiographic Examination ◽  
Adenoid Hypertrophy ◽  
Significance Level ◽  
Average Value ◽  
Middle Ear Pressure ◽  
Skull Radiography ◽  
Pearson Correlation Test ◽  
Male Patients

Abstract Introduction Adenoid hypertrophy is a change in adenoid size that can lead to obstruction the Eustachian tube and become a risk factor for otitis media effusion (OME) in children. Standard objective examination of adenoid hypertrophy uses adenoid-nasopharyngeal ratio (A-N ratio) based on correct lateral skull radiography. Adenoid hypertrophy is one of the factors causing OME in children. There is still much debate about the association between A-N ratio and tympanogram width (Tw). Determining the association of A-N ratio and Tw in adenoid hypertrophy patients. Methods Participants performed a true lateral radiographic examination using Fujioka method to determine A-N ratio, and Tw to determine middle-ear pressure. The distance between examination of A-N ratio and tympanogram examination was at maximum of ~1 week. The association between A-N ratio and Tw in patients with adenoid hypertrophy used the Pearson correlation test. This research employed significance level p < 0.05. Results Most participants were aged between 6 and 10 years (38.10%), male patients (57.14%), and the symptom most participants complained of was snoring during sleep (38.10%). Most participants had A-N ratio of 0.53 to 0.70 (61.90%) with an average of 0.60 ± 0.05. The average value of Tw measurement was 102.83 ± 50.03 daPa (r = 0.605; p < 0.001). Conclusion There is a significant association between A-N ratio base on true lateral radiographic examination and Tw in adenoid hypertrophy patients.

scholarly journals Hubungan antara Kedalaman Permukaan Air Tanah dengan Salinitas di Pesisir Pantai Kungkai Baru serta Penggunaan Model Discovery Learning

2018 ◽  
Vol 2 (2) ◽  
pp. 178-182
Author(s):  
Sutijo Joko Sudiro ◽  
Muchammad Farid ◽  
Eko Swistoro
Keyword(s):  
Learning Outcomes ◽  
Learning Model ◽  
Discovery Learning ◽  
High Ability ◽  
Significance Level ◽  
Average Value ◽  
A Value ◽  
Quasi Experimental ◽  
The Difference ◽  
The Relationship

ABSTRACT [Relationship between Groundwater Surface Depth with Salinity at the Coast of New Kungkai Beach and its Implementation on Discovery Learning Model]. The aims of this study were 1) to describe the relationship between groundwater surface depth with salinity in the coastal areas of new kungkai beach of Seluma, and 2) to determine the improvement of learning outcomes (cognitive) of high ability students, moderate and low by using discovery learning model on the concept of static fluid in class X computer and network engineering at SMK Negeri 3 Seluma. This research was a quasi experimental research with one groups pretest-posttest design. The results showed: 1) The relationship between depth with salinity has a value of 0.6478 with a significance level of 0.001 (<0.05); 2) Learning with discovery learning model can improve student learning outcomes on cognitive aspects (knowledge). Increased cognitive results can be seen from the average value of the initial test, the final test and the average value of gain in the class x Tkj is high-ability groups are at high criteria with a value of 0.75 gain in the group is in the criteria medium with the value of gain 0,52 and in the low group were in moderate criteria with a gain value of 0.44. There is a difference in learning outcomes between the high, medium and low groups. The difference is shown by Fcount > Ftable (4.04 > 3.35) with a significance level of 5%. Keywords: Groundwater surface depth; salinity; discovery learning model; SMKN 3 Seluma.

scholarly journals Influence Assessment of the Information Concerning the Bearing Type of Axle Box of Cars on the Automatic Classification Accuracy of Heated Boxes

2021 ◽  
pp. 5-14
Author(s):  
V. V Burchenkov
Keyword(s):  
Density Distribution ◽  
Probability Density ◽  
Heating Temperature ◽  
Threshold Value ◽  
Probability Density Distribution ◽  
Practical Implementation ◽  
System Of Equations ◽  
Average Value ◽  
Optimal Thresholds ◽  
Different Types

Purpose. The main purpose of the work is to determine and classify the heated cars’ boxes based on the probability of appearance of roller and cassette type boxes in the classes of heated and overheated boxes, as well as the laws of probability density distribution of the recognition signs of normally heated and overheated roller and cassette type boxes. Methodology. The operation features of freight cars with cassette type axle boxes with increased operating heating have been investigated. The methodology of assessing the probability of recognition errors was proposed, which takes into account the fact that sets of normally heated and overheated boxes consist of subsets of boxes with different types of bearings. A system of equations is obtained, the roots of which represent еру values that minimize the recognition probability of the errors of the heated boxes. Findings. It was found out that with some methods of determining the bearing type, for example, by the average value of the ranges of thermal image for each car, the probability of erroneous selection may depend on the probability density distribution of the sign for bearings of different types and the threshold value of this sign. The optimal thresholds for detecting the overheated roller boxes in comparison with the optimal thresholds for detecting overheated cassette boxes were determined. It has been established that the pass of an overheated cassette bearing, provided that the type of bearing is determined correctly, is less likely to lead to an accident than if the cassette box is classified as a roller box. The rejection criteria of axle boxes according to their heating temperature difference on one of the wheel set axis for three variants of settings of the alarm system according to an arrangement of multipurpose complexes of technical means (CTM) were formulated. The practical implementation of this method of adjusting the CTM settings for the Minsk branch of the Belarusian Railways was demonstrated. Originality. A system of equations is obtained, which allows finding the optimal values of temperature thresholds for the detection of overheated roller and cassette boxes under the assumption that the error probabilities in the selection of boxes by their types are known and constant. Practical value. The developed method of adjusting the alarm settings of CTM makes it possible to significantly reduce unjustified train delays and the number of car uncouplings.

scholarly journals PENGARUH MODEL DISCOVERY LEARNING BERBANTU KARTU MASALAH PADA MATERI GERAK LURUS TERHADAP HASIL BELAJAR SISWA KELAS X IPA SMA N 1 MRANGGEN TAHUN PELAJARAN 2014/2015

2018 ◽  
Vol 6 (1) ◽  
pp. 11
Author(s):  
Wisnu Kemuning ◽  
Nur Khoiri ◽  
Sigit Ristanto
Keyword(s):  
Sampling Technique ◽  
Final Analysis ◽  
Student Learning Outcomes ◽  
Learning Model ◽  
Discovery Learning ◽  
Science Class ◽  
Significance Level ◽  
Average Value ◽  
Learning Group ◽  
Academic Year

This study aims "To determine whether there is influence of discovery learning model assisted problem card in a straight motion on the results of study X science class SMA Negeri 1 Mranggen academic year 2014/2015". The population in this study were all class X  SMAN 1 Mranggen Academic Year 2014/2015. Sampling using cluster random sampling technique with the normal condition of all classes and homogeneous. Sampling results obtained by X-class science experiment 1 as a class were treated when learning takes place using discovery learning model and problem cards for class X IPA 2 as the control class is given learning using discuss learning group. Based on the final analysis of the t-test showed that t = 4.6738 while the table = 1.671 with a significance level of 5%. Because thitung > ttable is 4.6738> 1.671 it can be interpreted that the average student learning outcomes experimental class better than the class control. The average value of the experimental class is 77.6316 and 70.6579 as control class. Pursuant to the results of this study concluded that there are significant of discovery learning model assisted problem card in a straight motion on the results of study X science class SMA Negeri 1 Mranggen academic year 2014/2015.

scholarly journals Electronic application for oral health school programme enhances the quality of the information in dental health data records

2020 ◽  
Vol 53 (4) ◽  
pp. 206
Author(s):  
Nurul Fatikhah ◽  
Gilang Yubiliana ◽  
Fedri Ruluwedrata Rinawan
Keyword(s):  
Oral Health ◽  
Standard Deviation ◽  
Dental Health ◽  
Health Data ◽  
Rank Test ◽  
Significance Level ◽  
Electronic Application ◽  
Average Value ◽  
Health Programme

Background: Dental and oral health problems among elementary students can be resolved through an oral health programme in schools. The main factor that inhibited this scheme was that the recording and reporting still employed a manual system, making it less effective and efficient. The electronic application of this programme can help managers to complete both of these tasks. Purpose: This study’s aim is to assess the effectiveness of the electronic application that is utilised in the oral health school programme to increase the quality of the information relating to the recording of dental health data in schools. Methods: This study used a pre-test and post-test one-group design, and the sample consisted of 37 oral health programme managers in schools who were chosen via simple random sampling. The data in this study was analysed using the Wilcoxon signed-rank test. Results: The results showed that the use of the electronic application as part of the oral health scheme influenced the quality of the information when details were recorded and reported. This can be seen in the rise in the standard of the information that was noted and disclosed when comparing data before and after using the electronic application; the average value of 1.54 (standard deviation=1.45) increased to an average value of 3.58 (standard deviation=2.84) with a significance level of 0.000 (p<0.05). Conclusion: The electronic application used in conjunction with the oral health programme was effective in raising the quality of dental health records in schools.

scholarly journals Identification of Disease on Leaves Soybean using Modified Otsu and Learning Vector Quantization Neural Networks

Kursor ◽  
2018 ◽  
Vol 9 (3) ◽  
Author(s):  
Candra Dewi ◽  
Muhammad Sa’idul Umam ◽  
Imam Cholissodin
Keyword(s):  
Vector Quantization ◽  
Threshold Value ◽  
Learning Vector Quantization ◽  
Training Data ◽  
Blue Color ◽  
Phakopsora Pachyrhizi ◽  
Average Value ◽  
Maximum Value ◽  
Otsu Method ◽  
Soybean Leaf

Disease of the soybean crop is one of the obstacles to increase soybean production in Indonesia. Some of these diseases usually are found in the leaves and resulted to the crop become unhealthy. This study aims to identify disease on soybean leaf through leaves image by applying the Learning Vector Quantization (LVQ) algorithm. The identification begins with preprocessing using modified Otsu method to get part of the diseases on the leaves with a certain threshold value. The next process is to identify the type of disease using LVQ. This process uses the minimum value, the maximum value and the average value of the red, green and blue color of the image. The testing conducted in this study is to identify two diseases called Peronospora manshurica (Downy Mildew) and phakopsora pachyrhizi (Karat). The result of testing by using 60 training data and the value of all recommendations parameters obtained the highest accuracy of identification is 95% %, but the more stable accuracy is 90%. This result shows that the method perform quite well identification of two mentioned disease.

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