Different slip models were used for prediction of r value of BCC metal sheets from ODF coefficients.According to the maximum plastic work theory developed by Bishop and Hill,it is expected that the higher of Taylor fa...Different slip models were used for prediction of r value of BCC metal sheets from ODF coefficients.According to the maximum plastic work theory developed by Bishop and Hill,it is expected that the higher of Taylor factors given by a slip’ model,the better prediction obtained based on the model.From this point of view,a composed slip model of BCC metals was presented.Based on the model,the agreement of predicted r values for deep drawing steels with experimental ones is excellent.展开更多
In this paper, according to the data on the middle and strong earthquakes in China, we have preliminary studied the relation between the characteristic of space-time evolution of the seismic apparent strain field and ...In this paper, according to the data on the middle and strong earthquakes in China, we have preliminary studied the relation between the characteristic of space-time evolution of the seismic apparent strain field and the regions of 31 macroseism events since 1955. The result shows that, there is a rather well correlation between the anomaly region of seismic apparent strain and the zone of macroseism event occurrence within the time range of one to about five years. The R value of the application of the abnormal region of seismic apparent strain to predicting the area of strong earthquake occurrence is 0.458, and the empirical possibility of forecasting the region of macroseism occurrence is 0.625, and so the forecasting effect is comparatively well. Finally, the main results obtained above are discussed preliminarily.展开更多
The suppression of vitrinite reflectance (R0) was reported by many investigators , whereas the enhancement of vitrinite reflectance , the phenomenon that the measured R values are higher than the values that should be...The suppression of vitrinite reflectance (R0) was reported by many investigators , whereas the enhancement of vitrinite reflectance , the phenomenon that the measured R values are higher than the values that should be at the given regional rank , is in most cases unrecognized .Both R0 suppression and enhancement were observed in many basins in China , in coal seams as well as in oil source rocks , and representative examples are presented in this paper . A lot of experimental work on two series of samples was carried out for investigating the cause and mechanism of vitrinite reflectance suppression and enhancement , and effective methods for rectifying suppressed or enhanced R0 were sought on the basis of our organic geochemistry study in several basins . Our studies confirm : (1) the variations in initial hydrogen content and thermostability of vitrinite macerals are the main cause of both R0 suppression and enhancement ;(2) great care must be taken in using R0 to reflect the thermal histories of sedimentary basins because it can be not only suppressed, but also enhanced , although it has many advantages over other paleogeothermometers ; (3 ) the combined measurement of R0 and fluorescence spectrum on sporinite is an effective method for both recognizing and rectifying supressed or enhanced R0 values .展开更多
Low-carbon Cr-Mo micro-alloyed deep drawing dual-phase steels were designed in laboratory. As the mi- crostructure and texture evolution in hot-rolled strips and annealed sheets were investigated using SEM, TEM and XR...Low-carbon Cr-Mo micro-alloyed deep drawing dual-phase steels were designed in laboratory. As the mi- crostructure and texture evolution in hot-rolled strips and annealed sheets were investigated using SEM, TEM and XRD technologies, the attribution of solute Mo and MoC particles to DP sheets' drawing capacity was investigated. The precipitation thermodynamics were also calculated by Thermo-calc software. Results show that the precipitates in hot-rolled strips mainly are MoC, AIN and MnS, and with the increase of Mo addition, finer and denser MoC par- ticles precipitated in matrix and along grain boundaries of ferrite more easily. Weak textures are shown in the hot- rolled strips, and {112}~110~ and {223}%110~ components tend to be stable in subsequent cold rolling process. During annealing, on one hand, the development of ~lll~//ND texture is suppressed because finer MoC particles prevent the grain boundary migration. On the other hand, unfavorable texture {001 } %110:〉 significantly reduces with Mo increasing, which is attributed to that part of solution C in matrix has been fixed during recrystallization. In addition, the addition of Mo can enhance hardenability strongly and MoC easily re-dissolve at high temperature, which is favor to form martensite in dual-phase steel.展开更多
By analyzing the large-angle Bhabha scattering events e^+e^- → (γ)e^+e^- and diphoton events e^+^e- → (γ)γγ for the data sets collected at center-of-mass (c.m.) energies between 2.2324 and 4.5900 GeV (...By analyzing the large-angle Bhabha scattering events e^+e^- → (γ)e^+e^- and diphoton events e^+^e- → (γ)γγ for the data sets collected at center-of-mass (c.m.) energies between 2.2324 and 4.5900 GeV (131 energy points in total) with the upgraded Beijing Spectrometer (BESIII) at the Beijing Electron-Positron Collider (BEPCII), the integrated luminosities have been measured at the different c.m. energies, individually. The results are important inputs for the R value and J/ψ resonance parameter measurements.展开更多
文摘Different slip models were used for prediction of r value of BCC metal sheets from ODF coefficients.According to the maximum plastic work theory developed by Bishop and Hill,it is expected that the higher of Taylor factors given by a slip’ model,the better prediction obtained based on the model.From this point of view,a composed slip model of BCC metals was presented.Based on the model,the agreement of predicted r values for deep drawing steels with experimental ones is excellent.
基金The Key Project(95-04-06-03,95-04-07-02)from China Seismological Bureau.
文摘In this paper, according to the data on the middle and strong earthquakes in China, we have preliminary studied the relation between the characteristic of space-time evolution of the seismic apparent strain field and the regions of 31 macroseism events since 1955. The result shows that, there is a rather well correlation between the anomaly region of seismic apparent strain and the zone of macroseism event occurrence within the time range of one to about five years. The R value of the application of the abnormal region of seismic apparent strain to predicting the area of strong earthquake occurrence is 0.458, and the empirical possibility of forecasting the region of macroseism occurrence is 0.625, and so the forecasting effect is comparatively well. Finally, the main results obtained above are discussed preliminarily.
文摘The suppression of vitrinite reflectance (R0) was reported by many investigators , whereas the enhancement of vitrinite reflectance , the phenomenon that the measured R values are higher than the values that should be at the given regional rank , is in most cases unrecognized .Both R0 suppression and enhancement were observed in many basins in China , in coal seams as well as in oil source rocks , and representative examples are presented in this paper . A lot of experimental work on two series of samples was carried out for investigating the cause and mechanism of vitrinite reflectance suppression and enhancement , and effective methods for rectifying suppressed or enhanced R0 were sought on the basis of our organic geochemistry study in several basins . Our studies confirm : (1) the variations in initial hydrogen content and thermostability of vitrinite macerals are the main cause of both R0 suppression and enhancement ;(2) great care must be taken in using R0 to reflect the thermal histories of sedimentary basins because it can be not only suppressed, but also enhanced , although it has many advantages over other paleogeothermometers ; (3 ) the combined measurement of R0 and fluorescence spectrum on sporinite is an effective method for both recognizing and rectifying supressed or enhanced R0 values .
基金Item Sponsored by National Natural Science Foundation of China(50904006)The Fundamental Research Funds for the Central Universities of China(FRT-TP-10-001A)
文摘Low-carbon Cr-Mo micro-alloyed deep drawing dual-phase steels were designed in laboratory. As the mi- crostructure and texture evolution in hot-rolled strips and annealed sheets were investigated using SEM, TEM and XRD technologies, the attribution of solute Mo and MoC particles to DP sheets' drawing capacity was investigated. The precipitation thermodynamics were also calculated by Thermo-calc software. Results show that the precipitates in hot-rolled strips mainly are MoC, AIN and MnS, and with the increase of Mo addition, finer and denser MoC par- ticles precipitated in matrix and along grain boundaries of ferrite more easily. Weak textures are shown in the hot- rolled strips, and {112}~110~ and {223}%110~ components tend to be stable in subsequent cold rolling process. During annealing, on one hand, the development of ~lll~//ND texture is suppressed because finer MoC particles prevent the grain boundary migration. On the other hand, unfavorable texture {001 } %110:〉 significantly reduces with Mo increasing, which is attributed to that part of solution C in matrix has been fixed during recrystallization. In addition, the addition of Mo can enhance hardenability strongly and MoC easily re-dissolve at high temperature, which is favor to form martensite in dual-phase steel.
基金Supported by National Key Basic Research Program of China(2015CB856700)National Natural Science Foundation of China(NSFC)(10935007,11121092,11125525,11235011,11322544,11335008,11375170,11275189,11079030,11475164,11475169,11005109,10979095,11275211)+8 种基金Chinese Academy of Sciences(CAS)Large-Scale Scientific Facility ProgramJoint Large-Scale Scientific Facility Funds of the NSFC and CAS(11179007,U1232201,U1332201,U1532102).(KJCX2-YW-N29,KJCX2-YW-N45)100 Talents Program of CAS,INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology,German Research Foundation DFG(Collaborative Research Center CRC-1044)Istituto Nazionale di Fisica Nucleare,Italy,Ministry of Development of Turkey(DPT2006K-120470)Russian Foundation for Basic Research(14-07-91152)U.S.Department of Energy(DE-FG02-04ER41291,DE-FG02-05ER41374,DEFG02-94ER40823,DESC0010118)U.S.National Science Foundation,University of Groningen(RuG)the Helmholtzzentrum fuer Schwerionenforschung Gmb H(GSI)Darmstadt,WCU Program of National Research Foundation of Korea(R32-2008-000-10155-0)
文摘By analyzing the large-angle Bhabha scattering events e^+e^- → (γ)e^+e^- and diphoton events e^+^e- → (γ)γγ for the data sets collected at center-of-mass (c.m.) energies between 2.2324 and 4.5900 GeV (131 energy points in total) with the upgraded Beijing Spectrometer (BESIII) at the Beijing Electron-Positron Collider (BEPCII), the integrated luminosities have been measured at the different c.m. energies, individually. The results are important inputs for the R value and J/ψ resonance parameter measurements.