The basic mathematic models, such as the statistic model, the time\|serial model, the spatial dynamic model etc., and some typical analysis methods based on 3DCM are proposed and discussed. A few typical spatial decis...The basic mathematic models, such as the statistic model, the time\|serial model, the spatial dynamic model etc., and some typical analysis methods based on 3DCM are proposed and discussed. A few typical spatial decision making methods integrating the spatial analysis and the basic mathematical models are also introduced, e.g. visual impact assessment, dispersion of noise immissions, base station plan for wireless communication. In addition, a new idea of expectation of further applications and add\|in\|value service of 3DCM is promoted. As an example, the sunshine analysis is studied and some helpful conclusions are drawn.展开更多
InGaAsP/InP multiple quantum wells with quantum well intermixing have been prepared by impurity-free vacancy disordering.The luminescent characteristics were investigated using photoluminescence and photoreflectance,f...InGaAsP/InP multiple quantum wells with quantum well intermixing have been prepared by impurity-free vacancy disordering.The luminescent characteristics were investigated using photoluminescence and photoreflectance,from which the band gap blue shift was observed.Si3N4,SiO2 and SOG were used for the dielectric layer to enhance intermixing from the outdiffusion of group III atoms.All samples were annealed by rapid thermal annealing.The results indicate that the band gap blue shift varies with the dielectric layers and the annealing temperature.The SiO2 capping with an InGaAs cladding layer was successfully used to induce larger band tuning effect in the InGaAsP/InP MQWs than the Si3N4 capping with an InGaAs cladding layer.On the other hand, samples with the Si3N4-InP cap layer combination also show larger energy shifts than that with SiO2-InP cap layer combination.展开更多
文摘The basic mathematic models, such as the statistic model, the time\|serial model, the spatial dynamic model etc., and some typical analysis methods based on 3DCM are proposed and discussed. A few typical spatial decision making methods integrating the spatial analysis and the basic mathematical models are also introduced, e.g. visual impact assessment, dispersion of noise immissions, base station plan for wireless communication. In addition, a new idea of expectation of further applications and add\|in\|value service of 3DCM is promoted. As an example, the sunshine analysis is studied and some helpful conclusions are drawn.
文摘InGaAsP/InP multiple quantum wells with quantum well intermixing have been prepared by impurity-free vacancy disordering.The luminescent characteristics were investigated using photoluminescence and photoreflectance,from which the band gap blue shift was observed.Si3N4,SiO2 and SOG were used for the dielectric layer to enhance intermixing from the outdiffusion of group III atoms.All samples were annealed by rapid thermal annealing.The results indicate that the band gap blue shift varies with the dielectric layers and the annealing temperature.The SiO2 capping with an InGaAs cladding layer was successfully used to induce larger band tuning effect in the InGaAsP/InP MQWs than the Si3N4 capping with an InGaAs cladding layer.On the other hand, samples with the Si3N4-InP cap layer combination also show larger energy shifts than that with SiO2-InP cap layer combination.
文摘[目的]研究胃癌(gastric cancer,GC)患者血清miR-551b-3p的表达,探讨其作为GC潜在诊断生物标志物的可能性.[方法]收集40例GC患者术前、40例正常健康者血清标本,通过实时定量q-PCR检测miR-551 b-3p的表达情况,绘制受试者工作曲线(receiver operating characteristic curve,ROC),确定诊断cut-off值.[结果]GC患者、正常健康者血清miR-551 b-3p表达水平分别为0.045±0.004、0.19±0.38,与正常健康者比较,GC患者的miR-551b-3p水平显著下调(P=0.001).血清miR-551b-3p的表达与GC的临床病理特征之间的相关性分析结果表明,血清miR-551b-3p表达与年龄、性别无相关性,但与肿瘤大小、侵袭深度和TNM阶段有明显相关性.使用miR-551b-3p诊断GC时,ROC下面积(area under the ROC,AUC)为0.857(95%CI:0.77~0.939,P=0.000),预测阈值cut-off值为0.0152,对应的灵敏度、特异度分别为87.5%、70.0%.[结论]血清循环miR-551b-3p可能是诊断GC的新型生物学标志物,但仍需进一步扩大样本量进临床研究验证其诊断价值.
