Wyniki wyszukiwania - BazTech

1

Yellowfin tuna (Thunnusalbacares) fishing ground forecasting model based on bayes classifier in the South China Sea

Zhou W., Li A., Ji S., Qiu Y.

Polish Maritime Research

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2017

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S 2

140--146

EN

Using the yellowfin tuna (Thunnusalbacares,YFT)longline fishing catch data in the open South China Sea (SCS) provided by WCPFC, the optimum interpolation sea surface temperature (OISST) from CPC/NOAA and multi-satellites altimetric monthly averaged product sea surface height (SSH) released by CNES, eight alternative options based on Bayes classifier were made in this paper according to different strategies on the choice of environment factors and the levels of fishing zones to classify the YFT fishing ground in the open SCS. The classification results were compared with the actual ones for validation and analyzed to know how different plans impact on classification results and precision. The results of validation showed that the precision of the eight options were 71.4%, 75%, 70.8%, 74.4%, 66.7%, 68.5%, 57.7% and 63.7% in sequence, the first to sixth among them above 65% would meet the practical application needs basically. The alternatives which use SST and SSH simultaneously as the environmental factors have higher precision than which only use single SST environmental factor, and the consideration of adding SSH can improve the model precision to a certain extent. The options which use CPUE’s mean ± standard deviation as threshold have higher precision than which use CPUE’s 33.3%-quantile and 66.7%-quantile as the threshold

2

Experimental study on fatigue damage of train K6 spring

Huang H., Ji S., Huang G., Qin X., Shui G.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 3b

131--133

EN

Springs’ fatigue life and damage are key evaluation parameters for railway train bogies. Fatigue experiment on K6 bogie spring is carried out by digital display hydraulic pulse fatigue test device. Spring fatigue life is estimated by using nominal stress method. Based on the technology of ultrasound nondestructive test device, the relationship between accumulation of internal fatigue damage and cycle loading times is obtained. The results indicate that same batches of K6 springs have high reliability; spring material internal fatigue damage increases as cycle loading times.

PL

W artykule przedstawiono wyniki badań dotyczących zmęczenia sprężyn w podwoziach wagonowych. Analizie, przy pomocy hydraulicznego urządzenia testującego poddano sprężynę wagonową typu K6. Korzystając z badań ultradźwiękowych określono związek między tworzeniem się skupisk uszkodzeń wewnętrznych a cyklicznym obciążaniem.

3

The Bhopalator: An Information/Energy Dual Model of the Living Cell (II)

Ji S.

Fundamenta Informaticae

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2002

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Vol. 49, nr 1-3

147-165

EN

A molecular model of the living cell known as the Bhopalator is described with the hope of aiding mathematicians and computer scientists to develop comprehensive algebraic models of the cell. The Bhopalator is energy/information dual in the sense that it can be described using two complementary languages - the energy/matter based language of physics and chemistry and the information/sign based language of linguistics and mathematics. The availability of mathematical models of the cell may eventually lead to developing computer models of the living cell, resulting in important applications not only in biology and medicine but also in computer science and computer industry. To stimulate discussions among mathematicians and computer scientists, the algebraic encoding of the essential characteristics of the Bhopalator may be referred to as the C system (C indicating the cell), in analogy to the well-known H and P systems.