An approach to make heterogeneous devices cooperate with each other to provide ubiquitous service remains a longstanding challenge in ubiquitous environments. In addition, when multi-user request ubiquitous services s...An approach to make heterogeneous devices cooperate with each other to provide ubiquitous service remains a longstanding challenge in ubiquitous environments. In addition, when multi-user request ubiquitous services simultaneously, the arbitrariness in resource allocation process easily leads to non-equilibrium of qualities of multiuser's services. Thus, How to design an effective heterogeneous devices cooperation mechanism that meet the QoS requirements and also equilibrate QoS among multi-user's services becomes a very tough problem. In the paper, Equilibrium Index and Theil Utility function are imported to establish a multidevice equilibrium cooperation model, which is benefit for resource allocation in ubiquitous environments. Then a Theil-Equilibrium based Cooperation Mechanism for multi-service is proposed. Firstly, in order to simplify calculating, a dimensionless processing is introduced. After that, a cooperation approach with Theil-Utility Heuristic algorithm is designed to choose the best solution for the simplified model. At last, the mechanism is simulated in a smart home scenario. The simulation results show that this mechanism outperforms non-equilibrium method by improving almost 40% in internal equilibrium with just reducing 0-2% in the total utility ofall the requested ubiquitous services. These data show that the proposed mechanism performs well in equilibrating qualities of multi-user's ubiquitous services.展开更多
目的:构建肝再生磷酸酶-3(phosphatase of regenerating liver-3,PRL-3)基因过表达的重组慢病毒载体,研究其对结直肠癌细胞系HCT116迁移、侵袭能力的影响。方法:PCR扩增PRL-3基因并克隆至pcDH载体,构建成pcDH-PRL-3过表达载体,再将其与...目的:构建肝再生磷酸酶-3(phosphatase of regenerating liver-3,PRL-3)基因过表达的重组慢病毒载体,研究其对结直肠癌细胞系HCT116迁移、侵袭能力的影响。方法:PCR扩增PRL-3基因并克隆至pcDH载体,构建成pcDH-PRL-3过表达载体,再将其与慢病毒包装载体共转染293T细胞,包装成Lenti-PRL-3重组慢病毒载体,并感染结直肠癌细胞系HCT116。利用qPCR、Western分别从mRNA、蛋白水平检测PRL-3表达情况;通过划痕实验、Transwell实验研究过表达PRL-3对结直肠癌细胞系HCT116侵袭能力的影响。结果:成功构建Lenti-PRL-3重组慢病毒载体,并在结直肠癌细胞系HCT116过表达。划痕实验、Transwell实验结果表明过表达PRL-3能够促进HCT116细胞的迁移、侵袭。结论:构建Lenti-PRL-3重组慢病毒载体,在结直肠癌细胞系HCT116过表达PRL-3后能增加细胞的迁移、侵袭能力。展开更多
目的探讨不同脑白质病变严重程度的阿尔茨海默病(AD)患者伴发精神行为症状的差异。方法 37例AD患者采用3.0 T MRI仪检查,MRI白质高信号(WMH)采用Fazekas量表评分分级,分为无或轻度WMH组(14例)和中重度WMH组(23例),用神经精神科问卷(NPI...目的探讨不同脑白质病变严重程度的阿尔茨海默病(AD)患者伴发精神行为症状的差异。方法 37例AD患者采用3.0 T MRI仪检查,MRI白质高信号(WMH)采用Fazekas量表评分分级,分为无或轻度WMH组(14例)和中重度WMH组(23例),用神经精神科问卷(NPI)、简易智力检测量表(MMSE)、阿尔茨海默病评定量表-认知部分(ADAS-cog)评估基线和随访4周末精神行为症状和认知情况,将结果进行统计分析。结果无-轻度WMH组和中-重度WMH组组间年龄分别为(71.3±12.5)岁和(78.7±6.1)岁(P<0.05);两组间NPI基线和4周末评分两组间有统计学差异,中-重度组评分高于无-轻度组(P<0.05);NPI基线-4周变化值则无统计学差异,余项MMSE和ADAS-cog评分和基线-4周变化值均无统计学差异。结论阿尔茨海默病患者脑白质病变严重程度可能与伴发的精神行为症状有关。展开更多
基金partially supported by the Funds for Creative Research Groups of China(61121061)National Natural Science Foundation of China(61302078,61272515)+3 种基金863 Program(2011AA01A102)Ph.D.Programs Foundation of Ministry of Education of China(20110005110011)Beijing Higher Education Young Elite Teacher Project(YETP0476)Fundamental Research Funds for the Central Universities(2012RC0609)
文摘An approach to make heterogeneous devices cooperate with each other to provide ubiquitous service remains a longstanding challenge in ubiquitous environments. In addition, when multi-user request ubiquitous services simultaneously, the arbitrariness in resource allocation process easily leads to non-equilibrium of qualities of multiuser's services. Thus, How to design an effective heterogeneous devices cooperation mechanism that meet the QoS requirements and also equilibrate QoS among multi-user's services becomes a very tough problem. In the paper, Equilibrium Index and Theil Utility function are imported to establish a multidevice equilibrium cooperation model, which is benefit for resource allocation in ubiquitous environments. Then a Theil-Equilibrium based Cooperation Mechanism for multi-service is proposed. Firstly, in order to simplify calculating, a dimensionless processing is introduced. After that, a cooperation approach with Theil-Utility Heuristic algorithm is designed to choose the best solution for the simplified model. At last, the mechanism is simulated in a smart home scenario. The simulation results show that this mechanism outperforms non-equilibrium method by improving almost 40% in internal equilibrium with just reducing 0-2% in the total utility ofall the requested ubiquitous services. These data show that the proposed mechanism performs well in equilibrating qualities of multi-user's ubiquitous services.
文摘目的:构建肝再生磷酸酶-3(phosphatase of regenerating liver-3,PRL-3)基因过表达的重组慢病毒载体,研究其对结直肠癌细胞系HCT116迁移、侵袭能力的影响。方法:PCR扩增PRL-3基因并克隆至pcDH载体,构建成pcDH-PRL-3过表达载体,再将其与慢病毒包装载体共转染293T细胞,包装成Lenti-PRL-3重组慢病毒载体,并感染结直肠癌细胞系HCT116。利用qPCR、Western分别从mRNA、蛋白水平检测PRL-3表达情况;通过划痕实验、Transwell实验研究过表达PRL-3对结直肠癌细胞系HCT116侵袭能力的影响。结果:成功构建Lenti-PRL-3重组慢病毒载体,并在结直肠癌细胞系HCT116过表达。划痕实验、Transwell实验结果表明过表达PRL-3能够促进HCT116细胞的迁移、侵袭。结论:构建Lenti-PRL-3重组慢病毒载体,在结直肠癌细胞系HCT116过表达PRL-3后能增加细胞的迁移、侵袭能力。
文摘目的探讨不同脑白质病变严重程度的阿尔茨海默病(AD)患者伴发精神行为症状的差异。方法 37例AD患者采用3.0 T MRI仪检查,MRI白质高信号(WMH)采用Fazekas量表评分分级,分为无或轻度WMH组(14例)和中重度WMH组(23例),用神经精神科问卷(NPI)、简易智力检测量表(MMSE)、阿尔茨海默病评定量表-认知部分(ADAS-cog)评估基线和随访4周末精神行为症状和认知情况,将结果进行统计分析。结果无-轻度WMH组和中-重度WMH组组间年龄分别为(71.3±12.5)岁和(78.7±6.1)岁(P<0.05);两组间NPI基线和4周末评分两组间有统计学差异,中-重度组评分高于无-轻度组(P<0.05);NPI基线-4周变化值则无统计学差异,余项MMSE和ADAS-cog评分和基线-4周变化值均无统计学差异。结论阿尔茨海默病患者脑白质病变严重程度可能与伴发的精神行为症状有关。
