Ion beam-induced luminescence(IBIL) experiments were performed to investigate the in situ luminescence of GaN/Al_(2)O_(3) at varying ion energies,which allowed for the measurement of defects at different depths within...Ion beam-induced luminescence(IBIL) experiments were performed to investigate the in situ luminescence of GaN/Al_(2)O_(3) at varying ion energies,which allowed for the measurement of defects at different depths within the material.The energies of H^(+)were set to 500 keV,640 keV and 2 MeV,the Bragg peaks of which correspond to the GaN film,GaN/Al_(2)O_(3) heterojunction and Al_(2)O_(3) substrate,respectively.A photoluminescence measurement at 250 K was also performed for comparison,during which only near band edge(NBE) and yellow band luminescence in the GaN film were observed.The evolution of the luminescence of the NBE and yellow band in the GaN film was discussed,and both exhibited a decrease with the fluence of H^(+).Additionally,the luminescence of F centers,induced by oxygen vacancies,and Cr^(3+),resulting from the ^(2)E →^(4)A_(2) radiative transition in Al_(2)O_(3),were measured using 2 MeV H^(+).The luminescence intensity of F centers increases gradually with the fluence of H^(+).The luminescence evolution of Cr^(3+)is consistent with a yellow band center,attributed to its weak intensity,and it is situated within the emission band of the yellow band in the GaN film.Our results show that IBIL measurement can effectively detect the luminescence behavior of multilayer films by adjusting the ion energy.Luminescence measurement can be excited by various techniques,but IBIL can satisfy in situ luminescence measurement,and multilayer structural materials of tens of micrometers can be measured through IBIL by adjusting the energy of the inducing ions.The evolution of defects at different layers with ion fluence can be obtained.展开更多
目的评估前列腺癌患者单纯雄激素去除治疗（androgen deprivation therapy，ADT）后的健康相关生活质量（health－related quality of life，HRQOL）。方法选取2014年6月至2015年6月接受单纯ADT且符合本研究入组标准的前列腺癌患者共20...目的评估前列腺癌患者单纯雄激素去除治疗（androgen deprivation therapy，ADT）后的健康相关生活质量（health－related quality of life，HRQOL）。方法选取2014年6月至2015年6月接受单纯ADT且符合本研究入组标准的前列腺癌患者共200例，平均年龄73.9岁。诊断前列腺癌时平均PSA为21.57 ng/ml。158例（79%）为局限性前列腺癌，因年龄、身体状况、基础疾病、患者个人意愿等接受ADT，42例（21%）为局部晚期或转移性前列腺癌，符合ADT指征。应用简明健康生活量表（the MOS item short from health survey，SF－36）、癌症患者生活质量测定量表的通用模块（functional assessment of cancer therapy－general module，FACT－G）、前列腺癌治疗功能评价量表（functional assessment of cancer therapy －prostate instrument，FACT－P）、抑郁自评量表（self－rating depression scale，SDS）和焦虑自评量表（self－rating anxiety scale，SAS）等调查患者的HRQOL。结果本组200例患者的SF－36生理健康总得分、心理健康总得分分别为（67.41±16.39）分、（64.81±17.51）分，表明患者总体生活质量尚可，除一般健康维度得分为（40.03±21.89）分，其余7个维度平均得分均〉60分。FACT－P中情感维度得分、前列腺癌模块得分以及FACT－P总分均较低，分别为（8.15±3.72）分、（12.30±4.04）分、（77.41±9.95）分，均不足最高得分的50%，而生理状况得分相对较好，为（20.41±4.29）分；且121例（61%）患者在FACT－P的＂我能够达到并保持勃起＂条目中选择了＂一点也不＂选项。SDS平均得分为（46.76±8.29）分，SAS平均得分为（43.25±9.69）分，分别有46例（23.0%）和43例（21.5）患者出现不同程度的抑郁和焦虑。结论前列腺癌患者接受单纯ADT后总体生活状况尚可，但出现了不同程度的抑郁、焦虑、勃起功能障碍等不良反应。展开更多
采用数值计算和试验的方法,研究了直径30~50 mm Ti Al合金铸锭凝固组织的截面尺寸效应。结果表明:受径向散热和轴向散热竞争的影响,Ti Al合金铸锭的宏观组织存在竞争生长区、径向生长区和冒口影响区,随铸锭高径比增大,竞争生长区和冒口...采用数值计算和试验的方法,研究了直径30~50 mm Ti Al合金铸锭凝固组织的截面尺寸效应。结果表明:受径向散热和轴向散热竞争的影响,Ti Al合金铸锭的宏观组织存在竞争生长区、径向生长区和冒口影响区,随铸锭高径比增大,竞争生长区和冒口影响区占比减小,径向生长区占比增大。在径向生长区内,对于同一Ti Al合金铸锭,随散热距离的增加,柱状晶宽度增大,但增大的幅度逐渐减小;对于不同直径的Ti Al合金铸锭,在相同散热距离处,较大直径铸锭的柱状晶宽度更宽,且不同直径铸锭柱状晶宽度的差值随径向散热距离的增加而增大。通过拟合径向温度梯度和轴向温度梯度与铸锭直径和轴向散热距离的关系,建立了柱状晶生长方向与铸锭直径和轴向散热距离的关系。通过拟合温度梯度和凝固速率与铸锭直径和径向散热距离的关系,并耦合柱状晶宽度与温度梯度和凝固速率的关系,建立了柱状晶宽度与铸锭直径和径向散热距离的关系。展开更多
文摘Ion beam-induced luminescence(IBIL) experiments were performed to investigate the in situ luminescence of GaN/Al_(2)O_(3) at varying ion energies,which allowed for the measurement of defects at different depths within the material.The energies of H^(+)were set to 500 keV,640 keV and 2 MeV,the Bragg peaks of which correspond to the GaN film,GaN/Al_(2)O_(3) heterojunction and Al_(2)O_(3) substrate,respectively.A photoluminescence measurement at 250 K was also performed for comparison,during which only near band edge(NBE) and yellow band luminescence in the GaN film were observed.The evolution of the luminescence of the NBE and yellow band in the GaN film was discussed,and both exhibited a decrease with the fluence of H^(+).Additionally,the luminescence of F centers,induced by oxygen vacancies,and Cr^(3+),resulting from the ^(2)E →^(4)A_(2) radiative transition in Al_(2)O_(3),were measured using 2 MeV H^(+).The luminescence intensity of F centers increases gradually with the fluence of H^(+).The luminescence evolution of Cr^(3+)is consistent with a yellow band center,attributed to its weak intensity,and it is situated within the emission band of the yellow band in the GaN film.Our results show that IBIL measurement can effectively detect the luminescence behavior of multilayer films by adjusting the ion energy.Luminescence measurement can be excited by various techniques,but IBIL can satisfy in situ luminescence measurement,and multilayer structural materials of tens of micrometers can be measured through IBIL by adjusting the energy of the inducing ions.The evolution of defects at different layers with ion fluence can be obtained.
文摘目的评估前列腺癌患者单纯雄激素去除治疗（androgen deprivation therapy，ADT）后的健康相关生活质量（health－related quality of life，HRQOL）。方法选取2014年6月至2015年6月接受单纯ADT且符合本研究入组标准的前列腺癌患者共200例，平均年龄73.9岁。诊断前列腺癌时平均PSA为21.57 ng/ml。158例（79%）为局限性前列腺癌，因年龄、身体状况、基础疾病、患者个人意愿等接受ADT，42例（21%）为局部晚期或转移性前列腺癌，符合ADT指征。应用简明健康生活量表（the MOS item short from health survey，SF－36）、癌症患者生活质量测定量表的通用模块（functional assessment of cancer therapy－general module，FACT－G）、前列腺癌治疗功能评价量表（functional assessment of cancer therapy －prostate instrument，FACT－P）、抑郁自评量表（self－rating depression scale，SDS）和焦虑自评量表（self－rating anxiety scale，SAS）等调查患者的HRQOL。结果本组200例患者的SF－36生理健康总得分、心理健康总得分分别为（67.41±16.39）分、（64.81±17.51）分，表明患者总体生活质量尚可，除一般健康维度得分为（40.03±21.89）分，其余7个维度平均得分均〉60分。FACT－P中情感维度得分、前列腺癌模块得分以及FACT－P总分均较低，分别为（8.15±3.72）分、（12.30±4.04）分、（77.41±9.95）分，均不足最高得分的50%，而生理状况得分相对较好，为（20.41±4.29）分；且121例（61%）患者在FACT－P的＂我能够达到并保持勃起＂条目中选择了＂一点也不＂选项。SDS平均得分为（46.76±8.29）分，SAS平均得分为（43.25±9.69）分，分别有46例（23.0%）和43例（21.5）患者出现不同程度的抑郁和焦虑。结论前列腺癌患者接受单纯ADT后总体生活状况尚可，但出现了不同程度的抑郁、焦虑、勃起功能障碍等不良反应。
文摘采用数值计算和试验的方法,研究了直径30~50 mm Ti Al合金铸锭凝固组织的截面尺寸效应。结果表明:受径向散热和轴向散热竞争的影响,Ti Al合金铸锭的宏观组织存在竞争生长区、径向生长区和冒口影响区,随铸锭高径比增大,竞争生长区和冒口影响区占比减小,径向生长区占比增大。在径向生长区内,对于同一Ti Al合金铸锭,随散热距离的增加,柱状晶宽度增大,但增大的幅度逐渐减小;对于不同直径的Ti Al合金铸锭,在相同散热距离处,较大直径铸锭的柱状晶宽度更宽,且不同直径铸锭柱状晶宽度的差值随径向散热距离的增加而增大。通过拟合径向温度梯度和轴向温度梯度与铸锭直径和轴向散热距离的关系,建立了柱状晶生长方向与铸锭直径和轴向散热距离的关系。通过拟合温度梯度和凝固速率与铸锭直径和径向散热距离的关系,并耦合柱状晶宽度与温度梯度和凝固速率的关系,建立了柱状晶宽度与铸锭直径和径向散热距离的关系。
