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Principal Slip Zone determination in the Wenchuan earthquake Fault Scientifc Drilling project hole 1: considering the Bayesian discriminant function

Fang Sinan, Zhang Zhansong, Wang Zhi, Pan Heping, Du Ting

Acta Geophysica

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2020

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Vol. 68, no. 6

1595--1607

EN

Accurate determination of the Principal Slip Zone (PSZ) of earthquake fault zones is a key task of earthquake Fault Scientifc Drilling for future earthquake control. The fault zone structure of Wenchuan earthquake is complex, and there are many strong earthquakes recorded on the fault zone, which make determining the PSZ in the Wenchuan earthquake Fault Scientifc Drilling project-hole 1 (WFSD-1) difcult. At present, core analysis of whole coring is the decisive method for determining PSZ depth, and the fresh fault gouge at 589.2 m is the PSZ in WFSD-1. Abundant and comprehensive logging data can only be used as evidence to judge the PSZ. Based on the discrimination function and hyperplane equation in Bayes ian discriminant classifcation, we derive a new algorithm for computing the PSZ possibility using a Bayesian Discrimina tion function (PSZP-BDF) based on the simplifed model, and set up a mode to determine the PSZ directly using machine learning of well logging. For the verifcation of WFSD-1, the fault gouges are successfully identifed and the PSZ depth is accurately located. The algorithm objectively learns the sample data, which is naturally adaptive to the region. The calculation procedure is simple and does not require expensive coring data or heavy core tests in the well. The calculation speed is fast, using multiple physical data types. The PSZP-BDF algorithm is suitable for processing and interpreting earthquake fault scientifc drilling data.

2

The effect of zinc dithiophosphates on the friction and wear of partially stabilised zirconia. Part II. Zinc di(n-nonylphenyl, di-n-nonylphenyl) dithiophosphates tribological behaviour

Margielewski L., Stanecka-Badura R.

Tribologia

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2010

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nr 2

105-117

EN

Frictional and wear properties of zinc di(n-nonylphenyl)dithiophosphate (MA) and di(-di-n-nonylphenyl) dithiophosphate (DA) of n-hexadecane solution in frictional contact of ionic-ZrO2, partially stabilised by Y2O3 (PSZ) tested using a ball-disk tribometer, at 25oC, have been studied. It was found that zinc dithiophosphates significantly reduce friction and wear. The effectiveness of friction and wear reduction increases with the increasing number of n-nonyl chains of aryl in the additive molecule and with the concentration of additive solution. The sliding speed and load have a detrimental effect on their behaviour. Results of these frictional experiments are closely related to the results of adsorption data of MA and DA on PSZ powder from hydrocarbon solutions.

PL

Tarciowe i zużyciowe właściwości n-heksadekanowych roztworów di-n-nonylfenylditio-fosforanu cynku (MA) i di-(di-n-nonyl)fenyl-ditiofosforanu cynku (DA) w styku pary tarciowej jonowego – ZrO2 częściowo stabilizowanego Y2O3? (PSZ) były badane z użyciem tribometru kula-dysk w 25oC. Stwierdzono, że dodatki te znacząco zmniejszają w porównaniu z n-heksadekanem tarcie i zużycie. Zmniejszanie tarcia i zużycia jest zależne od liczby n-nonylowego łańcucha w fenylu cząsteczki dodatku i wzrasta ze stężeniem roztworu dodatku. Szybkość ślizgania i obciążenie mają wpływ odwrotny na te wartości. Wyniki tych badań są ściśle zależne od wyników adsorpcji tych dodatków na proszku PSZ z roztworów węglowodorowych, szczególnie od struktury warstwy i molowej entalpii adsorpcji dodatku.

3

The effect of zinc dithiophosphates on the friction and wear of partially stabilized zirconia. Part I. Zinc DI-N-alkyldithiophosphates tribological properties

Margielewski L.

Tribologia

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2010

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nr 2

87-104

EN

Tribological properties of zinc di-n-alkyldithiophosphates (ZDTPs) of ionic-ZrO2, partially stabilised by Y2O3 (PSZ), were performed using a ball-disk tribometer, at 25°C. It was found that ZDTPs significantly reduce the friction and wear under boundary conditions. Increasing the sliding speed and load have a detrimental effect on friction and wear. The effectiveness of friction and wear reduction increases with the increasing hydrocarbon chain of the additive molecule and the concentration of additive solution. The wear surface was analysed using an optical microscope and the SEM/EDX technique. The data results of friction and wear are in good correlation with magnitude and molar differential enthalpy adsorption of ZDTPs on PSZ powder from n-decane solutions and with phosphorus concentration on a rubbing surface.

PL

Tribologiczne właściwości di-n-alkiloditiofosforanów (ZDTPs) w styku pary tarciowej jonowego – ZrO2 częściowo stabilizowanego Y2O3 PSZ były badane z użyciem tribometru kula-dysk w 25oC. Stwierdzono, że ZDTPs znacząco zmniejsza tarcie i zużycie. Wzrost prędkości ślizgania i obciążenia ma niekorzystny wpływ na zmniejszenie tarcia i zużycia. Efektywność redukcji tarcia i zużycia wzrasta ze wzrostem długości łańcucha węglowodorowego i stężenia roztworu cząsteczki dodatku. Powierzchnia tarcia była analizowana z użyciem mikroskopu i techniki SEM/EDX. Wyniki tarcia i zużycia dobrze korelują z wielkościami i molową entalpią adsorpcji ZDTP na proszku PSZ z roztworu n-dekanowego i stężeniem fosforu na powierzchni tarcia.

4

New materials and ideas to be used in adiabatic engines

Jaskólski J., Krzyżak R.

Journal of KONES

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2004

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Vol. 11, No. 1-2

288-294

EN

This note concerns several topics. Firstly, a review of some less-known topics regarding the contemporary knowledge on TBC and piston caps is given. Then, it turns out that almost unknown New Periodic System of Elements can be of assistance to predict several properties of new TBC materials. Theoretically, there exist a possibility to join Si-AL-piston alloy with yttria-stabilised zirconia (and the like) by means of feId spars (plagioclase). The latter do not attain to melting temperature and can be arrested within the alloy. A shortened integral optical equation in the manner of inverse problem was used to compute the temperature drop accros the piston cap's layers. The YSZ layer operating in this hypothetical engine gave 517.5 graduate K drop, whereas the feldspar gave about 100-50graduate K temperature drop per mm. This arrangement would give minimised radiation and more or less 'cold' engine(piston). Perhaps, oxides of the thalium-sesquioxide-type structure would be better to stick to metal than the commonly used ones.