Under the condition of two different cases, the absorption of a pulsed probe field and its slow propagation in a triple semiconductor quantum well are investigated. The result shows that semiconductor medium becomes t...Under the condition of two different cases, the absorption of a pulsed probe field and its slow propagation in a triple semiconductor quantum well are investigated. The result shows that semiconductor medium becomes transparent due to the action of control field. Another result shows that by choosing appropriate physical parameters, the slow propagation of the input field can be achieved. The proposed scheme has some potential applications and may lead to the development of the controlled technique of optical buffers and optical delay lines.展开更多
This paper investigates the nonlinear evolution of the pulse probe field in an asymmetric coupled-quantum well driven coherently by a pulse probe field and two controlled fields. This study shows that, by choosing app...This paper investigates the nonlinear evolution of the pulse probe field in an asymmetric coupled-quantum well driven coherently by a pulse probe field and two controlled fields. This study shows that, by choosing appropriate physical parameters, self-modulation can precisely balance group velocity dispersion in the investigated system, leading to the formation of ultraslow optical solitons of the probe field. The proposed scheme may lead to the development of the controlled technique of optical buffers and optical delay lines.展开更多
A model accounting for more than 30 parameters of drilling projects, and a computer program to enumerate groupings of the wells of a pad with consequent calculations of technical-economic characteristics, are develope...A model accounting for more than 30 parameters of drilling projects, and a computer program to enumerate groupings of the wells of a pad with consequent calculations of technical-economic characteristics, are developed and tested. Seven drilling scenarios for a 24-well pad with different starting oil flow rates for the wells are studied. Optimal well groupings in terms of Net Present Value (NPV) for three discount rates and five oil production decline rates have been found. The results show that: NPV-maximizing well pad designs with unequal (varying) numbers of wells in groups (clusters) may require only slight alterations of existing designs (changing the configurations of a couple of well clusters);relative NPV gain is inversely proportional to the absolute value of NPV;observed increases in NPV in groupings with varying numbers of wells reach up to 1% with respect to groupings with equal (constant) numbers of wells in groups for conventional projects, and could reach 2% and more for shale formation development projects, and up to 45% for marginal projects.展开更多
The purpose of this Integrated Care Practice Change and Quality Improvement (ICPCQI) initiative was to evaluate the impact of wellness and relaxation and group psycho-education on health out-comes in an integrated car...The purpose of this Integrated Care Practice Change and Quality Improvement (ICPCQI) initiative was to evaluate the impact of wellness and relaxation and group psycho-education on health out-comes in an integrated care setting. Individuals diagnosed with mental illness and a co-occurring chronic medical condition participated in the ICPCQI initiatives which were run by peer support and wellness experts in an integrated care setting over the one-year project implementation period. Evaluation of outcome measures revealed an overall decline of 8.3% (p < 0.0001) and 7.3% (p < 0.0001) in the average systolic and diastolic blood pressure respectively. There was a 12.3% (p = 0.02) reduction on the average PHQ-9 scores. GAD-7 (p = 0.9) scores had a mean reduction of 1.5%. These preliminary results suggest that the evidence-based ICPCQI initiatives positively impact health outcomes among individuals with mental illness and chronic medical conditions.展开更多
玛湖油田致密砾岩油藏正转向效益开发阶段,需开展水平井井组合理压裂工艺参数优化研究。为此,通过充分挖掘已有油藏数值模型功能,提出了压裂-生产一体化数值模拟方法和流程,以基于弹性开发的井组整体采出程度为指标,对井组井距部署及压...玛湖油田致密砾岩油藏正转向效益开发阶段,需开展水平井井组合理压裂工艺参数优化研究。为此,通过充分挖掘已有油藏数值模型功能,提出了压裂-生产一体化数值模拟方法和流程,以基于弹性开发的井组整体采出程度为指标,对井组井距部署及压裂工艺参数进行敏感性分析,并基于正交设计原理,明确主控因素。结果表明:水平井井组产能随着井距、簇间距、用液强度的增加,均呈现先上升后下降的变化规律,加砂强度与井组产能呈正相关性;4个因素对井组整体采出程度的影响由高到低排序为井距、加砂强度、用液强度、簇间距;最优参数组合方案为井距250 m、簇间距20 m、用液强度30 m 3/m、加砂强度3 m 3/m,5年期整体采出程度为17.9%。该研究成果可为致密油水平井井组压裂优化设计提供技术支撑。展开更多
基金Project supported by the National Basic Research Program of China (Grant No. 2005CB724508)the National Natural Science Foundation of China (Grant No. 11065007)+1 种基金the Scientific Research Foundation of Jiangxi Provincial Department of Education,China (Grant No. GJJ10133)the Foundation of Talent of Jinggang of Jiangxi Province,China (Grant No. 2008DQ00400)
文摘Under the condition of two different cases, the absorption of a pulsed probe field and its slow propagation in a triple semiconductor quantum well are investigated. The result shows that semiconductor medium becomes transparent due to the action of control field. Another result shows that by choosing appropriate physical parameters, the slow propagation of the input field can be achieved. The proposed scheme has some potential applications and may lead to the development of the controlled technique of optical buffers and optical delay lines.
基金Project supported by the National Fundamental Research Program of China (Grant No 2005CB724508)Natural Science Foundation of Jiangxi, China (Grant Nos 2007GZW0819 and 2008GQW0017)+1 种基金the Scientific Research Foundation of Jiangxi Provincial Department of Education (Grant No GJJ09504)the Foundation of Talent of Jinggang of Jiangxi Province (Grant No 2008DQ00400)
文摘This paper investigates the nonlinear evolution of the pulse probe field in an asymmetric coupled-quantum well driven coherently by a pulse probe field and two controlled fields. This study shows that, by choosing appropriate physical parameters, self-modulation can precisely balance group velocity dispersion in the investigated system, leading to the formation of ultraslow optical solitons of the probe field. The proposed scheme may lead to the development of the controlled technique of optical buffers and optical delay lines.
文摘A model accounting for more than 30 parameters of drilling projects, and a computer program to enumerate groupings of the wells of a pad with consequent calculations of technical-economic characteristics, are developed and tested. Seven drilling scenarios for a 24-well pad with different starting oil flow rates for the wells are studied. Optimal well groupings in terms of Net Present Value (NPV) for three discount rates and five oil production decline rates have been found. The results show that: NPV-maximizing well pad designs with unequal (varying) numbers of wells in groups (clusters) may require only slight alterations of existing designs (changing the configurations of a couple of well clusters);relative NPV gain is inversely proportional to the absolute value of NPV;observed increases in NPV in groupings with varying numbers of wells reach up to 1% with respect to groupings with equal (constant) numbers of wells in groups for conventional projects, and could reach 2% and more for shale formation development projects, and up to 45% for marginal projects.
文摘The purpose of this Integrated Care Practice Change and Quality Improvement (ICPCQI) initiative was to evaluate the impact of wellness and relaxation and group psycho-education on health out-comes in an integrated care setting. Individuals diagnosed with mental illness and a co-occurring chronic medical condition participated in the ICPCQI initiatives which were run by peer support and wellness experts in an integrated care setting over the one-year project implementation period. Evaluation of outcome measures revealed an overall decline of 8.3% (p < 0.0001) and 7.3% (p < 0.0001) in the average systolic and diastolic blood pressure respectively. There was a 12.3% (p = 0.02) reduction on the average PHQ-9 scores. GAD-7 (p = 0.9) scores had a mean reduction of 1.5%. These preliminary results suggest that the evidence-based ICPCQI initiatives positively impact health outcomes among individuals with mental illness and chronic medical conditions.
文摘玛湖油田致密砾岩油藏正转向效益开发阶段,需开展水平井井组合理压裂工艺参数优化研究。为此,通过充分挖掘已有油藏数值模型功能,提出了压裂-生产一体化数值模拟方法和流程,以基于弹性开发的井组整体采出程度为指标,对井组井距部署及压裂工艺参数进行敏感性分析,并基于正交设计原理,明确主控因素。结果表明:水平井井组产能随着井距、簇间距、用液强度的增加,均呈现先上升后下降的变化规律,加砂强度与井组产能呈正相关性;4个因素对井组整体采出程度的影响由高到低排序为井距、加砂强度、用液强度、簇间距;最优参数组合方案为井距250 m、簇间距20 m、用液强度30 m 3/m、加砂强度3 m 3/m,5年期整体采出程度为17.9%。该研究成果可为致密油水平井井组压裂优化设计提供技术支撑。
