The increasing strength of new structural materials and the span of new structures, accompanied by aesthetic requirements for greater slenderness, are resulting in more applications of long-span structures. In this pa...The increasing strength of new structural materials and the span of new structures, accompanied by aesthetic requirements for greater slenderness, are resulting in more applications of long-span structures. In this paper, serviceability control technology and its design theory are studied. First, a novel tuned mass damper （TMD） with controllable stiffness is developed. Second, methods for modeling human-induced loads are proposed, including standing up, walking, jumping and running, and an analysis method for long-span floor response is proposed based on a finite element model. Third, a design method for long-span floors installed with a multiple TMD （MTMD） system considering human comfort is introduced, largely based on a study of existing literature. Finally, a design, analysis and field test is conducted using several large scale buildings in China including the Beijing Olympic Park National Conference Center, Changsha New Railway Station and the Xi＇an Northern Railway Station. The analytical and field test results show that the MTMD system designed using the proposed method is capable of effectively mitigating the vertical vibration of long-span floor structures. The study presented in this paper provides an important reference for the analysis of vibration serviceability of similar long-span floors and design of control system for these structures.展开更多
目的:探讨CD44与CD33在口腔黏膜良性淋巴组织增生病(benign lymphoadenosis of oral mucosa,BLOM)中的表达及临床意义。方法:选择2017年1月—2020年3月青岛市中医医院病理科77例BLOM蜡块作为实验组,另取同时间段63例正常口腔黏膜组织蜡...目的:探讨CD44与CD33在口腔黏膜良性淋巴组织增生病(benign lymphoadenosis of oral mucosa,BLOM)中的表达及临床意义。方法:选择2017年1月—2020年3月青岛市中医医院病理科77例BLOM蜡块作为实验组,另取同时间段63例正常口腔黏膜组织蜡块作为对照组。采用免疫组织化学法检测2组CD44、CD33阳性表达情况,采用Spearman分析BLOM患者病变组织中CD33与CD44阳性表达的相关性。收集患者一般资料,分析BLOM患者病变组织中CD33、CD44表达与临床病理特征的关系。采用SPSS 21.0软件包对数据进行统计学分析。结果:对照组、实验组CD33阳性表达率分别为95.24%、63.64%,差异有统计学意义(P<0.05);CD44阳性表达率分别为93.65%、67.53%,差异有统计学意义(P<0.05)。Spearman分析结果显示,BLOM患者病变组织中CD33与CD44阳性表达呈正相关(r=0.834,P=0.002);CD33、CD44表达与临床分型、炎症程度、有无淋巴滤泡、淋巴细胞浸润有关(P<0.05),而与年龄、性别、病程、病变部位、上皮表面角化无关(P>0.05)。结论:BLOM患者病变组织中CD33、CD44阳性表达率下降,与临床分型、炎症程度、有无淋巴滤泡、淋巴细胞浸润密切相关。展开更多
基金National Natural Science Foundation of China Under Grant No.51178100Foundation of the Priority Sciences Development Program of Higher Education Institutions of Jiangsu Province Under Grant No.1105007001+1 种基金Teaching and Research Foundation for Excellent Young Teachers of Southeast University Under Grant No.3205001205Scientific Research Foundation the Scientific Research Foundation of Graduate School of Southeast University Under Grant No.YBJJ1006
文摘The increasing strength of new structural materials and the span of new structures, accompanied by aesthetic requirements for greater slenderness, are resulting in more applications of long-span structures. In this paper, serviceability control technology and its design theory are studied. First, a novel tuned mass damper （TMD） with controllable stiffness is developed. Second, methods for modeling human-induced loads are proposed, including standing up, walking, jumping and running, and an analysis method for long-span floor response is proposed based on a finite element model. Third, a design method for long-span floors installed with a multiple TMD （MTMD） system considering human comfort is introduced, largely based on a study of existing literature. Finally, a design, analysis and field test is conducted using several large scale buildings in China including the Beijing Olympic Park National Conference Center, Changsha New Railway Station and the Xi＇an Northern Railway Station. The analytical and field test results show that the MTMD system designed using the proposed method is capable of effectively mitigating the vertical vibration of long-span floor structures. The study presented in this paper provides an important reference for the analysis of vibration serviceability of similar long-span floors and design of control system for these structures.
