PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 4

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  CUSUM
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available A Rapid Monitoring Method for Natural Gas Safety Monitoring
Li Rongli, Fan Yuexin
International Journal of Electronics and Telecommunications
|
2021
|
Vol. 67, No. 3
325--330
EN
The quick leakage alarm and the accurate concentration prediction are two important aspects of natural gas safety monitoring. In this paper, a rapid monitoring method of sensor data sharing, rapid leakage alarm and simultaneous output of concentrations prediction is proposed to accelerate the alarm speed and predict the possible impact of leakage. In this method, the Dempster-Shafer evidence theory is used to fuse the trend judgment and the CUSUM (cumulative sum) and the Gauss-Newton iteration is used to predict the concentration. The experiment system based on the TGS2611 natural gas sensor was built. The results show that the fusion method is significantly better than the single monitoring method. The alarm time of fusion method was more advanced than that of the CUSUM method and the trend method (being averagely, 10.4% and 7.6% in advance in the CUSUM method and the trend method respectively). The relative deviations of the predicted concentration were the maximum (13.3%) at 2000 ppm (parts per million) and the minimum (0.8%) at 6000 ppm, respectively.
2
Content available Which control chart is the best for the particleboard industry: Shewhart, CUSUM or EWMA?
Kurt Rifat, Karayilmazlar Selman
Drewno : prace naukowe, doniesienia, komunikaty
|
2021
|
vol. 64, nr 208
95--117
EN
In this study, control charts were prepared using data received from a particleboard manufacturer to determine the factors that impair quality, and the most suitable control charts for the company were specified accordingly. The study material consisted of the tensile strength values of boards taken from a factory over three months. Shewhart, CUSUM and EWMA control charts were used for variable quantities to achieve the targeted quality level. It was concluded from the research that interdependent and independent evaluation of the data observed during particleboard manufacturing was required; therefore, the combined use of CUSUM and Shewhart control charts was proposed.
3
Content available Control charts monitoring for quality concrete pavements
Skrzypczak Izabela, Kokoszka Wanda, Pytlowany Tomasz, Radwański Wojciech
Zeszyty Naukowe. Transport / Politechnika Śląska
|
2020
|
z. 106
153--163
EN
In this article, Control charts are employed to analyse the strength quality control of ready-mixed concrete for rigid pavement. The results of the study support that CUSUM statistical analysis is more sensitive than the Shewhart control chart. The CUSUM chart can detect the continual changes in the concrete quality in a more accurate way. By combining the CUSUM control chart and the Shewhart control chart, higher accuracy of quality control analysis could be achieved, in order words, for quality control performance when in built/pouring the ready-mix concrete as rigid pavement.
4
Content available Problemy związane z zastosowaniem kart kontrolnych CUSUM do oceny zgodności betonu w świetle PN-EN 206:2014
Szczygielska E., Tur V.
Przegląd Budowlany
|
2017
|
R. 88, nr 1
44--48
PL
W artykule przedstawiono uwagi dotyczące postępowania przy ocenie zgodności wytrzymałości betonu na ściskanie przeprowadzanej na podstawie kart kontrolnych CUSUM oraz powiązanej z nią kontroli produkcji z wykorzystaniem kart CUSUM-M, CUSUM-R oraz CUSUM-C. Przeanalizowano skutki reakcji systemu CUSUM przy ocenie zgodności przeprowadzanej na wspólnej karcie kontrolnej stosowanej do oceny odchyleń od wymaganej wytrzymałości średniej, wykorzystywanej zarówno w odniesieniu do kontroli produkcji, jak i do oceny zgodności. Przedstawiono wyniki analiz parametrów karty kontrolnej CUSUM, stosowanej do oceny zgodności wytrzymałości betonu na ściskanie według metody C normy PN-EN 206:2014–04, pod względem spełnienia wymaganego poziomu AOQ.
EN
The article presents comments on the procedure of conformity assessment of concrete compressive strength carried out on the basis of CUSUM control charts and the associated production control using CUSUM-M, CUSUM-R and CUSUM-C. The effects of CUSUM system response have been analyzed taking into consideration conformity assessment carried out in the common control chart used to assess deviations from the target mean strength, used both for production control as well as for conformity assessment. The paper presents the results of the analysis of CUSUM control chart parameters used to assess the conformity of concrete compressive strength according to the PN-EN 206:2014-04 method C, in terms of compliance with the required AOQ level.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.