Five microporous MOFs were synthesized and their static adsorption properties for light hydrocarbons were experimentally investigated at 298 K and 150 kPa.Among the five MOFs,HKUST-1 and Ni(bdc)(ted)0.5 exhibited much...Five microporous MOFs were synthesized and their static adsorption properties for light hydrocarbons were experimentally investigated at 298 K and 150 kPa.Among the five MOFs,HKUST-1 and Ni(bdc)(ted)0.5 exhibited much higher uptakes of ethane and propane than PCN-250,UiO-66,and ZIF-8.Breakthrough experiments were carried out at 298 K and atmospheric pressure on HKUST-1 and two commercially used adsorbents.HKUST-1 exhibited a much lower dynamic than static adsorption capacity.Moreover,HKUST-1 and the two traditional adsorbents could effectively separate binary(ethane/propane)and ternary(ethane/propane/toluene)mixtures.展开更多
静息态功能磁共振成像(resting-state functional magnetic resonance imaging,rs-fMRI)研究已被广泛应用于帕金森病(Parkinson's disease,PD)等神经退行性疾病的病理生理分析。帕金森患者的症状包括运动症状及非运动症状,辅助运动...静息态功能磁共振成像(resting-state functional magnetic resonance imaging,rs-fMRI)研究已被广泛应用于帕金森病(Parkinson's disease,PD)等神经退行性疾病的病理生理分析。帕金森患者的症状包括运动症状及非运动症状,辅助运动区(supplementary motor area,SMA)与帕金森病的病理生理有关。在这篇综述中,笔者总结了PD患者有关SMA区的rs-fMRI研究,反映了大脑网络重组与适应的变化,以跟踪和预测帕金森病的进展。展开更多
目的:探讨基于扩散加权成像(diffusion-weighted imaging,DWI)的纹理分析在胶质瘤分级中的价值。方法:回顾性分析经病理学检查证实的30例低级别胶质瘤(low grade glioma,LGG)(Ⅱ级)与97例高级别胶质瘤(high grade glioma,HGG)(Ⅲ级46例...目的:探讨基于扩散加权成像(diffusion-weighted imaging,DWI)的纹理分析在胶质瘤分级中的价值。方法:回顾性分析经病理学检查证实的30例低级别胶质瘤(low grade glioma,LGG)(Ⅱ级)与97例高级别胶质瘤(high grade glioma,HGG)(Ⅲ级46例,Ⅳ级51例),使用Ma Zda ver.4.6提取所有患者DWI图像中肿瘤实质信号最高区域的纹理特征并分析其中的直方图参数,包括均值、方差、偏度和峰度,以及第1、10、50、90和99百分位数(Pere.1%、Pere.10%、Pere.50%、Pere.90%、Pere.99%),方差、峰度这两个参数的比较采用非参数秩和检验(Mann-Whitney U检验),其余参数采用独立样本t检验(independent-samples t test),使用受试者工作特征(receiver operating characteristic,ROC)曲线分析有统计学意义的参数在HGG与LGG之间的诊断效能,运用多变量Logistic回归分析对有统计学意义的纹理参数进行建模并绘制ROC曲线评价模型效能。结果:直方图参数中的均值、方差与第1、10、50、90、99百分位数在LGG和HGG间的差异有统计学意义[(144.198±47.133) vs (185.609±40.341),(28.101±39.529) vs (160.143±211.832),(134.233±43.673) vs (162.577±40.478),(138.100±44.970) vs (172.814±39.384),(144.400±47.211) vs(186.247±40.473),(149.833±49.537) vs (197.443±42.977),(152.333±50.384) vs (201.361±43.720),P均<0.001],偏度、峰度在两组间的差异无统计学意义[(-0.322±0.499)vs(-0.369±0.542),P=0.669;(-0.171±0.587) vs (-0.135±0.973),P=0.440]。两组间的方差以29.23为阈值时具有最高的诊断效能,对应的灵敏度、特异度及曲线下面积(area under the curve,AUC)分别为72.16%、76.67%、0.793。通过这7个纹理参数建立的多参数Logistic回归诊断模型的灵敏度、特异度及AUC分别为61.86%、86.67%、0.807。结论:基于DWI的纹理分析中的直方图参数可于术前有效地鉴别HGG与LGG,其中方差具有较高的诊断效能。展开更多
The wavefunctions with a simple Gaussian form for the α-particle in the light nuclei have been used in some literatures.This note shows that this type of the α-particle wavefunction can not fit the experimental data...The wavefunctions with a simple Gaussian form for the α-particle in the light nuclei have been used in some literatures.This note shows that this type of the α-particle wavefunction can not fit the experimental data for electron scattering.展开更多
An energy independent real part potential is presented.This potential can well describe the energy dependent experimental data for the ^(12)C+^(12)C scattering in the energy region of E_(c.m.)≈30-80 MeV.
基金supported by the National Natural Science Foundation of China(grant number:21701189).
文摘Five microporous MOFs were synthesized and their static adsorption properties for light hydrocarbons were experimentally investigated at 298 K and 150 kPa.Among the five MOFs,HKUST-1 and Ni(bdc)(ted)0.5 exhibited much higher uptakes of ethane and propane than PCN-250,UiO-66,and ZIF-8.Breakthrough experiments were carried out at 298 K and atmospheric pressure on HKUST-1 and two commercially used adsorbents.HKUST-1 exhibited a much lower dynamic than static adsorption capacity.Moreover,HKUST-1 and the two traditional adsorbents could effectively separate binary(ethane/propane)and ternary(ethane/propane/toluene)mixtures.
文摘静息态功能磁共振成像(resting-state functional magnetic resonance imaging,rs-fMRI)研究已被广泛应用于帕金森病(Parkinson's disease,PD)等神经退行性疾病的病理生理分析。帕金森患者的症状包括运动症状及非运动症状,辅助运动区(supplementary motor area,SMA)与帕金森病的病理生理有关。在这篇综述中,笔者总结了PD患者有关SMA区的rs-fMRI研究,反映了大脑网络重组与适应的变化,以跟踪和预测帕金森病的进展。
文摘目的:探讨基于扩散加权成像(diffusion-weighted imaging,DWI)的纹理分析在胶质瘤分级中的价值。方法:回顾性分析经病理学检查证实的30例低级别胶质瘤(low grade glioma,LGG)(Ⅱ级)与97例高级别胶质瘤(high grade glioma,HGG)(Ⅲ级46例,Ⅳ级51例),使用Ma Zda ver.4.6提取所有患者DWI图像中肿瘤实质信号最高区域的纹理特征并分析其中的直方图参数,包括均值、方差、偏度和峰度,以及第1、10、50、90和99百分位数(Pere.1%、Pere.10%、Pere.50%、Pere.90%、Pere.99%),方差、峰度这两个参数的比较采用非参数秩和检验(Mann-Whitney U检验),其余参数采用独立样本t检验(independent-samples t test),使用受试者工作特征(receiver operating characteristic,ROC)曲线分析有统计学意义的参数在HGG与LGG之间的诊断效能,运用多变量Logistic回归分析对有统计学意义的纹理参数进行建模并绘制ROC曲线评价模型效能。结果:直方图参数中的均值、方差与第1、10、50、90、99百分位数在LGG和HGG间的差异有统计学意义[(144.198±47.133) vs (185.609±40.341),(28.101±39.529) vs (160.143±211.832),(134.233±43.673) vs (162.577±40.478),(138.100±44.970) vs (172.814±39.384),(144.400±47.211) vs(186.247±40.473),(149.833±49.537) vs (197.443±42.977),(152.333±50.384) vs (201.361±43.720),P均<0.001],偏度、峰度在两组间的差异无统计学意义[(-0.322±0.499)vs(-0.369±0.542),P=0.669;(-0.171±0.587) vs (-0.135±0.973),P=0.440]。两组间的方差以29.23为阈值时具有最高的诊断效能,对应的灵敏度、特异度及曲线下面积(area under the curve,AUC)分别为72.16%、76.67%、0.793。通过这7个纹理参数建立的多参数Logistic回归诊断模型的灵敏度、特异度及AUC分别为61.86%、86.67%、0.807。结论:基于DWI的纹理分析中的直方图参数可于术前有效地鉴别HGG与LGG,其中方差具有较高的诊断效能。
基金Supported in part by the National Natural Science Foundation of China.
文摘The wavefunctions with a simple Gaussian form for the α-particle in the light nuclei have been used in some literatures.This note shows that this type of the α-particle wavefunction can not fit the experimental data for electron scattering.
基金Supported in part by the National Natural Science Foundation of Chinaby the grant LWTZ-1298 of the Chinese Academy of Sciences.
文摘An energy independent real part potential is presented.This potential can well describe the energy dependent experimental data for the ^(12)C+^(12)C scattering in the energy region of E_(c.m.)≈30-80 MeV.
