通过对湿重度分别为5.5 k N/m^(3)、6 k N/m^(3)的泡沫轻质土进行渗透及吸失水试验,研究了泡沫轻质土的孔隙状态、渗透系数及吸失水性能。试验结果表明:气泡混合轻质土是一种高孔隙率材料,其孔隙占比在75%以上,渗透系数约为10^(-5)~10^(...通过对湿重度分别为5.5 k N/m^(3)、6 k N/m^(3)的泡沫轻质土进行渗透及吸失水试验,研究了泡沫轻质土的孔隙状态、渗透系数及吸失水性能。试验结果表明:气泡混合轻质土是一种高孔隙率材料,其孔隙占比在75%以上,渗透系数约为10^(-5)~10^(-6)数量级,介于粉质粘土与粘土的渗透系数之间;受水浸泡后,泡沫轻质土容重最大增加约25%,失水后容重仍然有约9.5%增加量,在工程设计中应根据不同置换路基施工环境对设计容重按照1.0~1.25之间进行修正。展开更多
目的研究细胞骨架关联蛋白4(cytoskeleton-associated protein 4,CKAP4)检测在肺癌诊断中的价值。方法收集2019年1月至2019年11月医院收治并经病理确诊的治疗前肺癌患者232例及健康人群160例作为对照,采用酶联免疫吸附法检测血清CKAP4...目的研究细胞骨架关联蛋白4(cytoskeleton-associated protein 4,CKAP4)检测在肺癌诊断中的价值。方法收集2019年1月至2019年11月医院收治并经病理确诊的治疗前肺癌患者232例及健康人群160例作为对照,采用酶联免疫吸附法检测血清CKAP4水平、化学发光免疫分析法检测血清癌胚抗原(CEA)、细胞角蛋白19可溶性片段(CYFRA21-1)。结果通过健康人群样本数据拟合正态曲线取第95百分位数建立CKAP4参考区间,为0~17.40ng/L,此时CKAP4肺癌诊断灵敏度为29.8%,特异性为95.0%,ROC曲线下面积(AUC)为0.68;其灵敏度显著优于CEA、CYFRA21-1对相同样本所显示的灵敏度;联合CEA、CYFRA21-1对中、晚期肺癌诊断的AUC可达0.85、0.93。血清CKAP4水平随肺癌TNM分期进展而升高,在不同肿瘤分化程度、肺癌类型、肿瘤大小、区域淋巴结转移程度、远处转移情况中差异也有统计学意义(P<0.05)。结论血清CKAP4检测在肺癌诊断的灵敏度上优于CEA、CYFRA21-1,与肺癌进展和病理关系密切,且特异性较高,可用于排除肺肿瘤方面的筛查和分期评估。展开更多
Spectrum sharing for efficient reuse of licensed spectrum is an important concept for cognitive radio technologies.In a spectrum-sharing system(SSS),deploying the antennas in a distributed manner can offer a new spati...Spectrum sharing for efficient reuse of licensed spectrum is an important concept for cognitive radio technologies.In a spectrum-sharing system(SSS),deploying the antennas in a distributed manner can offer a new spatial dimension for the efficient reuse of licensed frequency bands.To improve the whole performance of multiple secondary users(SUs),this paper addresses the problem of coordinated multi-SU spectrum sharing in a distributed antenna-based SSS.By adopting the Hungarian method,the primal decomposition method and pricing policy,we propose a coordinated multi-user transmission scheme,so as to maximize the sum-rate of SUs.Simulation results show that the proposed method can significantly enhance the system performance,and the computational complexity is low.展开更多
文摘通过对湿重度分别为5.5 k N/m^(3)、6 k N/m^(3)的泡沫轻质土进行渗透及吸失水试验,研究了泡沫轻质土的孔隙状态、渗透系数及吸失水性能。试验结果表明:气泡混合轻质土是一种高孔隙率材料,其孔隙占比在75%以上,渗透系数约为10^(-5)~10^(-6)数量级,介于粉质粘土与粘土的渗透系数之间;受水浸泡后,泡沫轻质土容重最大增加约25%,失水后容重仍然有约9.5%增加量,在工程设计中应根据不同置换路基施工环境对设计容重按照1.0~1.25之间进行修正。
文摘目的研究细胞骨架关联蛋白4(cytoskeleton-associated protein 4,CKAP4)检测在肺癌诊断中的价值。方法收集2019年1月至2019年11月医院收治并经病理确诊的治疗前肺癌患者232例及健康人群160例作为对照,采用酶联免疫吸附法检测血清CKAP4水平、化学发光免疫分析法检测血清癌胚抗原(CEA)、细胞角蛋白19可溶性片段(CYFRA21-1)。结果通过健康人群样本数据拟合正态曲线取第95百分位数建立CKAP4参考区间,为0~17.40ng/L,此时CKAP4肺癌诊断灵敏度为29.8%,特异性为95.0%,ROC曲线下面积(AUC)为0.68;其灵敏度显著优于CEA、CYFRA21-1对相同样本所显示的灵敏度;联合CEA、CYFRA21-1对中、晚期肺癌诊断的AUC可达0.85、0.93。血清CKAP4水平随肺癌TNM分期进展而升高,在不同肿瘤分化程度、肺癌类型、肿瘤大小、区域淋巴结转移程度、远处转移情况中差异也有统计学意义(P<0.05)。结论血清CKAP4检测在肺癌诊断的灵敏度上优于CEA、CYFRA21-1,与肺癌进展和病理关系密切,且特异性较高,可用于排除肺肿瘤方面的筛查和分期评估。
基金supported in part by the National Science Foundation of China for Young Scholars under grant No.61201186The National Basic Research Program undergrant No.2012AA01A502+5 种基金National Natural Science Foundation of China under grant No.61201192National S&T Major Project under grant No.2014ZX03003003-002Tsinghua-HUAWEI Joint R&D on Soft Defined Protocol StackTsinghua-HUAWEI Joint Research on 5G Air Interface TechnicalTsinghua-Qualcom joint research programIndependent innovation on Future Virtualization Platform under grant No.015Z02-3
文摘Spectrum sharing for efficient reuse of licensed spectrum is an important concept for cognitive radio technologies.In a spectrum-sharing system(SSS),deploying the antennas in a distributed manner can offer a new spatial dimension for the efficient reuse of licensed frequency bands.To improve the whole performance of multiple secondary users(SUs),this paper addresses the problem of coordinated multi-SU spectrum sharing in a distributed antenna-based SSS.By adopting the Hungarian method,the primal decomposition method and pricing policy,we propose a coordinated multi-user transmission scheme,so as to maximize the sum-rate of SUs.Simulation results show that the proposed method can significantly enhance the system performance,and the computational complexity is low.
