Based on analysis of NMR T2 spectral characteristics,a new method for identifying fluid properties by decomposing T2 spectrum through signal analysis has been proposed.Because T2 spectrum satisfies lognormal distribut...Based on analysis of NMR T2 spectral characteristics,a new method for identifying fluid properties by decomposing T2 spectrum through signal analysis has been proposed.Because T2 spectrum satisfies lognormal distribution on transverse relaxation time axis,the T2 spectrum can be decomposed into 2 to 5 independent component spectra by fitting the T2 spectrum with Gauss functions.By analyzing the free relaxation response characteristics of crude oil and formation water,the dynamic response characteristics of the core mutual drive between oil and water,the petrophysical significance of each component spectrum is clarified.T2 spectrum can be decomposed into clay bound water component spectrum,capillary bound fluid component spectrum,micropores fluid component spectrum and macropores fluid component spectrum.According to the nature of crude oil in the target area,the distribution range of T2 component spectral peaks of oil-bearing reservoir is 165-500 ms on T2 time axis.This range can be used to accurately identify fluid properties.This method has high adaptability in identifying complex oil and water layers in low porosity and permeability reservoirs.展开更多
As is well known,Marx left a tremen-dously rich intellectual heritage.Even though J.F.Lyotard,one of the world's leading post-modernists,regarded Marxism in its le-gitimate form as"meta-narrative"that mu...As is well known,Marx left a tremen-dously rich intellectual heritage.Even though J.F.Lyotard,one of the world's leading post-modernists,regarded Marxism in its le-gitimate form as"meta-narrative"that must be rejected he nonetheless admitted that Marxism could also develop into a critical form of knowledge.1 In fact,a lot of con-temporary researchers believe that Marx was a true forerunner of critical reflection on modernity.For example,Best and Kellner point out in their The Postmodern Turn(1997)that Karl Marx was the first social theorist to develop the concepts of moder-nity and pre-modernity and evolve full theo-retical viewpoints on modernity.2 Although Marx never directly used the term"moder-nity"his profound insight into the modern society characterized by capitalism contained a comprehensive indirect diagnosis of modernity.展开更多
I.Introduction One of the common tasks faced by tran-sitional economies is the conversion of state-owned enterprises(SOEs)to non-public enterprises.In our observation of the tran-sitional economies we have discovered ...I.Introduction One of the common tasks faced by tran-sitional economies is the conversion of state-owned enterprises(SOEs)to non-public enterprises.In our observation of the tran-sitional economies we have discovered great variances in the conversion in different economies and different sectors.For example,why did recession characterized by the lowering of social welfare occur in Eastern European countries during the early days of transition while it has not in China?In the competitive trades,why is the con-version at a higher degree and quicker insteps in some trades while it is not so in others?A large number of economists gave their explanations to the first question.butthey have failed to give a satisfactory expla-nation to the second.To go a step further,does the conversion of the SOEs to non-public enterprises have its own inherent logicand the external forces just obey or run counter to it?What are the respective consequences?This paper tries to delve into the endogenous mechanism of the non-pub-lic conversion of the SOEs and,on this basis,give an explanation to the above phenomena and questions.展开更多
基金Supported by the China National Science and Technology Major Project(2016ZX05050)
文摘Based on analysis of NMR T2 spectral characteristics,a new method for identifying fluid properties by decomposing T2 spectrum through signal analysis has been proposed.Because T2 spectrum satisfies lognormal distribution on transverse relaxation time axis,the T2 spectrum can be decomposed into 2 to 5 independent component spectra by fitting the T2 spectrum with Gauss functions.By analyzing the free relaxation response characteristics of crude oil and formation water,the dynamic response characteristics of the core mutual drive between oil and water,the petrophysical significance of each component spectrum is clarified.T2 spectrum can be decomposed into clay bound water component spectrum,capillary bound fluid component spectrum,micropores fluid component spectrum and macropores fluid component spectrum.According to the nature of crude oil in the target area,the distribution range of T2 component spectral peaks of oil-bearing reservoir is 165-500 ms on T2 time axis.This range can be used to accurately identify fluid properties.This method has high adaptability in identifying complex oil and water layers in low porosity and permeability reservoirs.
文摘As is well known,Marx left a tremen-dously rich intellectual heritage.Even though J.F.Lyotard,one of the world's leading post-modernists,regarded Marxism in its le-gitimate form as"meta-narrative"that must be rejected he nonetheless admitted that Marxism could also develop into a critical form of knowledge.1 In fact,a lot of con-temporary researchers believe that Marx was a true forerunner of critical reflection on modernity.For example,Best and Kellner point out in their The Postmodern Turn(1997)that Karl Marx was the first social theorist to develop the concepts of moder-nity and pre-modernity and evolve full theo-retical viewpoints on modernity.2 Although Marx never directly used the term"moder-nity"his profound insight into the modern society characterized by capitalism contained a comprehensive indirect diagnosis of modernity.
文摘I.Introduction One of the common tasks faced by tran-sitional economies is the conversion of state-owned enterprises(SOEs)to non-public enterprises.In our observation of the tran-sitional economies we have discovered great variances in the conversion in different economies and different sectors.For example,why did recession characterized by the lowering of social welfare occur in Eastern European countries during the early days of transition while it has not in China?In the competitive trades,why is the con-version at a higher degree and quicker insteps in some trades while it is not so in others?A large number of economists gave their explanations to the first question.butthey have failed to give a satisfactory expla-nation to the second.To go a step further,does the conversion of the SOEs to non-public enterprises have its own inherent logicand the external forces just obey or run counter to it?What are the respective consequences?This paper tries to delve into the endogenous mechanism of the non-pub-lic conversion of the SOEs and,on this basis,give an explanation to the above phenomena and questions.
