Cyclic load experiment study on the laminated composite RC walls with different concrete ages

Hongmei Zhang,Xilin Lu,Jianbao Li,Lin Liang 국제구조공학회 2010 Structural Engineering and Mechanics, An Int'l Jou Vol.36 No.6

12 typical laminated composite reinforced concrete (RC) walls with different concrete ages and 3 cast-in-place RC walls subjected to low frequency cyclic load were carried out in this study. The failure mode, force-deformation response and energy dissipation capacity of these specimens were investigated. Differences of structural behaviours between composite RC walls and common cast-in-place RC walls were emphasized in the analysis. The compatibility of the composite specimens with different concrete ages was discussed based on the experiment. Test results indicated that the differences between the lateral bearing capacity and the displacement ductility of the composite walls and the common walls were not so obvious. Some of the composite specimen even has higher bearing capacity under the experiment loading situation. Besides, the two parts of the laminated composite specimens demonstrates incompatibility at the later loading sequence on failure mode and strain response when it is in tension. Finally, this laminated composite shear walls are suggested to be applied in rapid reconstruction structures which is not very high.

Topology optimization of the photovoltaic panel connector in high-rise buildings

Xilin Lu,Jiaqi Xu,Hongmei Zhang,Peng Wei 국제구조공학회 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.62 No.4

Photovoltaic (PV) panels are used in high-rise buildings to convert solar energy to electricity. Due to the considerable energy consumption of high-rise buildings, applying PV technology is of great significance to energy saving. In the application of PV panels, one of the most important construction issues is the connection of the PV panel with the main structures. One major difficulty of the connection design is that the PV panel connection consists of two separate components with coupling and indeterminate dimension. In this paper, the gap element is employed in these two separated but coupled components, i.e., hook and catch. Topology optimization is applied to optimize and design the cross-section of the PV panel connection. Pareto optimization is conducted to operate the optimization subject to multiple load scenarios. The initial design for the topology optimization is determined by the common design specified by the Technical Code for Glass Curtain Wall Engineering (JGJ 102-2003). Gravity and wind load scenarios are considered for the optimization and numerical analysis. Post analysis is conducted for the optimal design obtained by the topology optimization due to the manufactory requirements. Generally, compared with the conventional design, the optimized connector reduces material use with improved structural characteristics.

Simulation of the damping effect of a high-rise CRST frame structure

Xilin Lu,Chunguang Meng,Hongmei Zhang 사단법인 한국계산역학회 2012 Computers and Concrete, An International Journal Vol.9 No.4

The damping effect of a Concrete-filled Rectangular Steel Tube (CRST) frame structure is studied in this paper. Viscous dampers are employed to insure the function of the building especially subjected to earthquakes, for some of the main vertical elements of the building are not continuous. The shaking table test of a 1:15 scale model was conducted under different earthquake excitations to recognize the seismic behavior of this building. And the vibration damping effect was also investigated by the shaking table test and the simulation analysis. The nonlinear time-history analysis of the shaking table test model was carried out by the finite element analysis program CANNY. The simulation model was constructed in accordance with the tested one and was analyzed under the same loading condition and the simulation effect was then validated by the tested results. Further more, the simulation analysis of the prototype structure was carried out by the same procedure. Both the simulated and tested results indicate that there are no obvious weak stories on the damping equipped structure, and the dampers can provide the probability of an irregular CRST frame structure to meet the requirements of the design code on energy dissipation and deformation limitation.

比较分析宗教在印巴两国民族国家构建中的作用

和红,梅(He, Hongmei),时,仅,(Shi, Jin),贾,露(Jia, Lu) 한국정치사회연구소 2021 한국과 국제사회 Vol.5 No.5

印度半岛是世界上宗教历史最悠久的区域,宗教贯穿了从古印度到英属印度,再到后来印巴分治的历史发展过程。第二次世界大战结束之后,随着世界民族解放运动热潮澎湃,再加上英属印度境内的印度教徒和穆斯林之间的对立不断激化,宗主国英国推出了《蒙巴顿方案》来承认穆斯林建立独立政权的权力,这最终导致印度于1950年正式构建了民族国家,紧接着1956年巴基斯坦构建了共和国。宗教因素对印巴两国的民族国家构建,以及对建国后的从政治经济等各个领域都起到了重要的作用。本文在比较分析印度教对印度建国的作用和伊斯兰教对巴基斯坦建国的作用后,论证了宗教在印巴两国民族构建作用方面的相同点和差异性。本文发现了宗教是印巴两国构建民族国家的思想基础,但在凝聚力方面存在明显差异;宗教思想不同程度的影响了两国的国家政策和施政纲领;宗教还不同程度的强化了两国各民族对于国家的认同感。 The Indian peninsula is the region with the longest religious history in the world. Religion runs through the historical development process from ancient India to British India, and then to the partition between India and Pakistan. After the second world war, with the booming of national movement for emancipation, coupled with British India suffering from intensified confrontation between hindus and muslims, suzerain Britain introduced the ‘Mountbatten Plan’ to admit Muslim to establish a separated regime, which ultimately led to the construction of India nation-state in 1950, and the formation of Pakistan followed in 1956. Religious factors played an important role in the nation-state construction, as well as in various fields including politics, economy and so on after the establishment of the two countries. After a comparative analysis of the Hinduism’s role in the founding of India and that of Islam in the founding of Pakistan, this paper demonstrated the similarities and differences of religions’ roles in India and Pakistan. As a result, this paper found that religions were the ideological basis for both India and Pakistan to build a nation-state, but there are obvious differences in cohesion. Religious thoughts have influenced the national policies and administrative programs of the two countries in different degrees. Religions also more or less have strengthened the sense of national identity of each ethnic group in the two countries.

Silencing IL-23 expression by a small hairpin RNA protects against asthma in mice

Yanchun Li,Shucheng Hua,Jirong Lu,Meng Sun,Huanji Cheng,Shanyu Li,Li Liu,Hongmei Qiao 생화학분자생물학회 2011 Experimental and molecular medicine Vol.43 No.4

To determine the impact of IL-23 knockdown by RNA interference on the development and severity of ovalbumin (OVA)-induced asthmatic inflammation, and the potential mechanisms in mice, the IL-23-specific RNAi-expressing pSRZsi-IL-23p19 plasmid was constructed and inhaled into OVA-sensitized mice before each challenge, as compared with that of control mice treated with alum or budesonide. Inhalation of the pSRZsi-IL-23p19, significantly reduced the levels of OVA-challenge induced IL-23 in the lung tissues by nearly 75%, determined by RT-PCR. In addition, knockdown of IL-23 expression dramatically reduced the numbers of eosinophils and neutrophils in BALF and mitigated inflammation in the lungs of asthmatic mice. Furthermore, knockdown of IL-23 expression significantly decreased the levels of serum IgE, IL-23,IL-17, and IL-4, but not IFNγ, and its anti-inflammatory effects were similar to or better than that of treatment with budesonide in asthmatic mice. Our data support the notion that IL-23 and associated Th17 responses contribute to the pathogenic process of bronchial asthma. Knockdown of IL-23 by RNAi effectively inhibits asthmatic inflammation, which is associated with mitigating the production of IL-17 and IL-4 in asthmatic mice.

The Smart Eye Frame Based On Internet of Things

Xin Zhenghua,Chen Guolong,Li Hong,Song Qixiang,Xiao Meng,Lu Biao,Lu Hongmei,Shi Yaqi 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.11

Silencing IL-23 expression by a small hairpin RNA protects against asthma in mice

Li, Yanchun,Sun, Meng,Cheng, Huanji,Li, Shanyu,Liu, Li,Qiao, Hongmei,Hua, Shucheng,Lu, Jirong Korean Society for Biochemistry and Molecular Bion 2011 Experimental and molecular medicine Vol.43 No.4

To determine the impact of IL-23 knockdown by RNA interference on the development and severity of ovalbumin (OVA)-induced asthmatic inflammation, and the potential mechanisms in mice, the IL-23-specific RNAi-expressing pSRZsi-IL-23p19 plasmid was constructed and inhaled into OVA-sensitized mice before each challenge, as compared with that of control mice treated with alum or budesonide. Inhalation of the pSRZsi-IL-23p19, significantly reduced the levels of OVA-challenge induced IL-23 in the lung tissues by nearly 75%, determined by RT-PCR. In addition, knockdown of IL-23 expression dramatically reduced the numbers of eosinophils and neutrophils in BALF and mitigated inflammation in the lungs of asthmatic mice. Furthermore, knockdown of IL-23 expression significantly decreased the levels of serum IgE, IL-23, IL-17, and IL-4, but not IFN${\gamma}$, and its anti-inflammatory effects were similar to or better than that of treatment with budesonide in asthmatic mice. Our data support the notion that IL-23 and associated Th17 responses contribute to the pathogenic process of bronchial asthma. Knockdown of IL-23 by RNAi effectively inhibits asthmatic inflammation, which is associated with mitigating the production of IL-17 and IL-4 in asthmatic mice.

The System of Controlling the Robot by the Smart Phones based on the Bluetooth

Zhenghua Xin,Guolong Chen,Qixiang Song,Liangyi Hu,Hongmei Lu,Pei Jiang,Yayun Sun,Lei Chen 보안공학연구지원센터 2014 International Journal of Smart Home Vol.8 No.5

Associations of racial and ethnic discrimination with adverse changes in exercise and screen time during the COVID-19 pandemic in the United States

Xia Tong,Gee Gilbert C.,Jian Li,Liu Xinyue,Dai Jin,Shi Lu,Zhang Donglan,Chen Zhuo,Han Xuesong,Li Yan,Li Hongmei,Wen Ming,Su Dejun,Chen Liwei 한국역학회 2023 Epidemiology and Health Vol.45 No.-

Objectives: During the coronavirus disease 2019 (COVID-19) pandemic, a growing prevalence of racial and ethnic discrimination occurred when many Americans struggled to maintain healthy lifestyles. This study investigated the associations of racial and ethnic discrimination with changes in exercise and screen time during the pandemic in the United States (US). Methods: We included 2,613 adults who self-identified as non-Hispanic White, non-Hispanic Black, non-Hispanic Asian, or Hispanic from the Health, Ethnicity, and Pandemic (HEAP) study, a cross-sectional survey conducted among a nationally representative sample of US adults between October and November 2020. We assessed self-reported racial and ethnic discrimination by measuring COVID-19-related racial and ethnic bias and examined its associations with changes in exercise and screen time using multivariable logistic regression models. We analyzed data between September 2021 and March 2022.Results: COVID-19-related racial and ethnic bias was associated with decreased exercise time among non-Hispanic Asian (odds ratio [OR]=1.46; 95% confidence interval [CI], 1.13–1.89) and Hispanic people (OR=1.91; 95% CI, 1.32–2.77), and with increased screen time among non-Hispanic Black people (OR=1.94; 95% CI, 1.33–2.85), adjusting for age, gender, education, marital status, annual household income, insurance, and employment status. Conclusions: Racial and ethnic discrimination may have adversely influenced exercise and screen time changes among racial and ethnic minorities during the COVID-19 pandemic in the US. Further studies are needed to investigate the mechanisms through which racial and ethnic discrimination can impact lifestyles and to develop potential strategies to address racial and ethnic discrimination as a barrier to healthy lifestyles.