TN248.4 2001042419InGaN多量子阱面发射微盘激光器的理论研究=Theoreticalmodel for surface-emitting microdisk of InGaNMQW[刊,中]/谢成城,王舒民(北京大学物理系.北京(100871))//半导体光电.-2000,21(3).-188-192为了实现半导体微...TN248.4 2001042419InGaN多量子阱面发射微盘激光器的理论研究=Theoreticalmodel for surface-emitting microdisk of InGaNMQW[刊,中]/谢成城,王舒民(北京大学物理系.北京(100871))//半导体光电.-2000,21(3).-188-192为了实现半导体微盘激光器的单模面发射,设计了一种以InGaN多量子阱为有源层,GaN外延层为覆盖层的半导体微盘激光器。通过对GaN覆盖层进行图形刻蚀,可以对不同的角模式进行有选择的增益,由此实现选模。展开更多
AIM： To analyze manometric abnormalities in patients with isolated distal reflux and compare these findings in patients with erosive and non-erosive disease, METHODS： Five hundred and fifty patients who presented to...AIM： To analyze manometric abnormalities in patients with isolated distal reflux and compare these findings in patients with erosive and non-erosive disease, METHODS： Five hundred and fifty patients who presented to the outpatient clinic of Turkiye Yuksek Ihtisas Hospital with gastroesophageal reflux disease-like symptoms were enrolled, Each individual was evaluated with esophageal manometry, 24-h ambulatory pH monitoring, and upper gastrointestinal endoscopy, Manometric findings for the patients with isolated distal reflux were compared to findings in controls who were free of reflux disorders or hypersensitive esophagus, Findings for isolated distal reflux patients with and without erosive reflux disease were also compared, RESULTS： Of the 550 subjects enrolled, 97 （17.6%, mean age 48 years） had isolated distal reflux and i00 had no abnormalities on ambulatory pH monitoring （control group, mean age 45 years）. There were no significant differences between the isolated distal reflux group and control group with respect to age, body mass index, and esophageal body contraction amplitude （EBCA）. Mean lower esophageal sphincter pressure was significantly higher in the control group （12.7 ± 10.3 mmHg vs 9.6 ± 7.4 mmHg, P = 0.01）. Fifty-five （56.7%） of the 97 patients with isolated distal reflux had erosive reflux disease. There were no statistical differences between the erosive reflux disease and non-erosive reflux disease subgroups with respect to mean EBCA, lower esophageal sphincter pressure, or DeMeester score.However, 13% of patients with gastroesophageal reflux disease had distal wave amplitudes ≤ 30 mmHg, whereas none of the patients with non-erosive reflux disease had distal wave amplitudes in this low category. CONCLUSION： Patients with erosive and non-erosive disease present with similar manometric abnormalities. The only striking difference is the observation of very low EBCA exclusively in patients with erosive disease.展开更多
In this paper, we propose a scheme for the remote preparation of a three-particle Greenberger-HorneZeilinger class state by a two-particle entangled state and a three-particle entangled state. It is shown that, by thi...In this paper, we propose a scheme for the remote preparation of a three-particle Greenberger-HorneZeilinger class state by a two-particle entangled state and a three-particle entangled state. It is shown that, by this scheme, only two classical bits and one two-particle projective measurement are enough for such preparation.展开更多
Acoustic reflection imaging in deep water wells is a new application scope for offshore hydrocarbon exploration.Two-dimensional(2 D)geological structure images can be obtained away from a one-dimensional(1 D)borehole ...Acoustic reflection imaging in deep water wells is a new application scope for offshore hydrocarbon exploration.Two-dimensional(2 D)geological structure images can be obtained away from a one-dimensional(1 D)borehole using single-well acoustic reflection imaging.Based on the directivity of dipole source and four-component dipole data,one can achieve the azimuth detection and the three-dimensional(3 D)structural information around the wellbore can be obtained.We first perform matrix rotation on the field fourcomponent data.Then,a series of processing steps are applied to the rotated dipole data to obtain the reflector image.According to the above dipole shear-wave imaging principle,we used four-component cross-dipole logging data from a deviated well in the South China Sea to image geological structures within 50 m of a deviated well,which can delineate the structural configuration and determine its orientation.The configuration of near-borehole bedding boundaries and fault structures from shear-wave imaging results agrees with those from the Inline and Xline seismic profiles of the study area.In addition,the configuration and orientation of the fault structure images are consistent with regional stress maps and the results of the borehole stress anisotropy analysis.Furthermore,the dip azimuth of the bedding boundary images was determined using borehole wall resistivity data.Results of this study indicate that integrating borehole acoustic reflection with seismic imaging not only fills the gap between the two measurement scales but also accurately delineates geological structures in the borehole vicinity.展开更多
We propose an experimentally feasible teleportation scheme with three-atom W-class state,which was first proposed by Agrawal and Pati [P.Agrawal and A.Pati,Phys.Rev.A 74 (2006) 062320 ],in cavity QED.In this scheme at...We propose an experimentally feasible teleportation scheme with three-atom W-class state,which was first proposed by Agrawal and Pati [P.Agrawal and A.Pati,Phys.Rev.A 74 (2006) 062320 ],in cavity QED.In this scheme atoms interact simultaneously with a nonresonant cavity and there is no energy exchange between the atoms and the cavity.Thus it is insensitive to the cavity decay,which is of importance in view of experiment.展开更多
文摘TN248.4 2001042419InGaN多量子阱面发射微盘激光器的理论研究=Theoreticalmodel for surface-emitting microdisk of InGaNMQW[刊,中]/谢成城,王舒民(北京大学物理系.北京(100871))//半导体光电.-2000,21(3).-188-192为了实现半导体微盘激光器的单模面发射,设计了一种以InGaN多量子阱为有源层,GaN外延层为覆盖层的半导体微盘激光器。通过对GaN覆盖层进行图形刻蚀,可以对不同的角模式进行有选择的增益,由此实现选模。
文摘AIM： To analyze manometric abnormalities in patients with isolated distal reflux and compare these findings in patients with erosive and non-erosive disease, METHODS： Five hundred and fifty patients who presented to the outpatient clinic of Turkiye Yuksek Ihtisas Hospital with gastroesophageal reflux disease-like symptoms were enrolled, Each individual was evaluated with esophageal manometry, 24-h ambulatory pH monitoring, and upper gastrointestinal endoscopy, Manometric findings for the patients with isolated distal reflux were compared to findings in controls who were free of reflux disorders or hypersensitive esophagus, Findings for isolated distal reflux patients with and without erosive reflux disease were also compared, RESULTS： Of the 550 subjects enrolled, 97 （17.6%, mean age 48 years） had isolated distal reflux and i00 had no abnormalities on ambulatory pH monitoring （control group, mean age 45 years）. There were no significant differences between the isolated distal reflux group and control group with respect to age, body mass index, and esophageal body contraction amplitude （EBCA）. Mean lower esophageal sphincter pressure was significantly higher in the control group （12.7 ± 10.3 mmHg vs 9.6 ± 7.4 mmHg, P = 0.01）. Fifty-five （56.7%） of the 97 patients with isolated distal reflux had erosive reflux disease. There were no statistical differences between the erosive reflux disease and non-erosive reflux disease subgroups with respect to mean EBCA, lower esophageal sphincter pressure, or DeMeester score.However, 13% of patients with gastroesophageal reflux disease had distal wave amplitudes ≤ 30 mmHg, whereas none of the patients with non-erosive reflux disease had distal wave amplitudes in this low category. CONCLUSION： Patients with erosive and non-erosive disease present with similar manometric abnormalities. The only striking difference is the observation of very low EBCA exclusively in patients with erosive disease.
文摘In this paper, we propose a scheme for the remote preparation of a three-particle Greenberger-HorneZeilinger class state by a two-particle entangled state and a three-particle entangled state. It is shown that, by this scheme, only two classical bits and one two-particle projective measurement are enough for such preparation.
基金supported by the National Natural Science Foundation of China(Nos.41804124,41774138,41804121,41604109)China Academy of Sciences Strategic Leading Science and Technology Project(Grant Nos.XDA14020304,XDA14020302)+2 种基金Shandong Provincial Natural Science Foundation,China(No.ZR2019BD039)Shandong Province Postdoctoral Innovation Project(No.201901011)China Postdoctoral Science Foundation(Grant Nos.2019T120615,2018M632745)
文摘Acoustic reflection imaging in deep water wells is a new application scope for offshore hydrocarbon exploration.Two-dimensional(2 D)geological structure images can be obtained away from a one-dimensional(1 D)borehole using single-well acoustic reflection imaging.Based on the directivity of dipole source and four-component dipole data,one can achieve the azimuth detection and the three-dimensional(3 D)structural information around the wellbore can be obtained.We first perform matrix rotation on the field fourcomponent data.Then,a series of processing steps are applied to the rotated dipole data to obtain the reflector image.According to the above dipole shear-wave imaging principle,we used four-component cross-dipole logging data from a deviated well in the South China Sea to image geological structures within 50 m of a deviated well,which can delineate the structural configuration and determine its orientation.The configuration of near-borehole bedding boundaries and fault structures from shear-wave imaging results agrees with those from the Inline and Xline seismic profiles of the study area.In addition,the configuration and orientation of the fault structure images are consistent with regional stress maps and the results of the borehole stress anisotropy analysis.Furthermore,the dip azimuth of the bedding boundary images was determined using borehole wall resistivity data.Results of this study indicate that integrating borehole acoustic reflection with seismic imaging not only fills the gap between the two measurement scales but also accurately delineates geological structures in the borehole vicinity.
文摘We propose an experimentally feasible teleportation scheme with three-atom W-class state,which was first proposed by Agrawal and Pati [P.Agrawal and A.Pati,Phys.Rev.A 74 (2006) 062320 ],in cavity QED.In this scheme atoms interact simultaneously with a nonresonant cavity and there is no energy exchange between the atoms and the cavity.Thus it is insensitive to the cavity decay,which is of importance in view of experiment.
