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RISS 인기검색어
- 검색키워드
- 저자 : Caiqi Zhao (검색결과 3 건)
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Mechanical Properties of a Novel Modular Joint of Single-Layer Aluminium Alloy Lattice Shell
Caiqi Zhao,Yunwen Zhou,Gang Wang,Yating Wang,Haoyue Li 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.3
To overcome the disadvantages of the discontinuous webs in the joint area of aluminium-alloy gusset joints and to further improve the efficiency of high-altitude positioning and installation of aluminium-alloy reticulated shell joints, this paper proposed a novel modular joint. Four sets of joint specimens were processed by computerized numerical control machine tools to carry out bearing capacity tests. The mechanical characteristics, failure mechanism and stiffness trends of this novel joint were explored. The results show that the proposed novel modular joints are significantly better than the traditional gusset joints in terms of bearing capacity and ductility. The flexural strength of the novel joints is 17% higher than that of the traditional gusset joints, and the novel joints have good deformability, which can prevent brittle failure. The results of elastoplastic finite element optimization analysis based on multiple contacts show that the theoretical failure mode and the curve of the load versus displacement of the joints are in good agreement with the actual measurements. Although the bearing capacity of the joints increases with increasing thickness of the modular unit and the reinforcement ring, when the thickness of the bottom plate exceeds twice the thickness of the top plate, this increase is very limited. Based on the working mechanism of the novel joints, a simplified calculation formula for their ultimate bearing capacity is proposed, which provides a theoretical basis for the engineering design and specification preparation of this type of joint henceforth.
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Research and Optimization of Lateral Compressive Performance of the 3-D Printed Beetle Elytron Plate
Caiqi Zhao,Tengteng Zheng,Lijie Shang,Haitao Lan,Shuo Yang 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.8
In this paper, two types of beetle elytron plates (end-trabecular beetle elytron plate (EBEP) and middle-trabecular beetle elytron plate (MBEP)) and honeycomb plate (HP) were manufactured by 3-D printed and applied to large-span spatial structure. The lateral compressive performance of the 3-D printed beetle elytron plate was investigated by lateral compression bearing capacity test and numerical analysis. The influence of number of cylinders, ratio of the radius of the cylinder to the side length of the hexagonal honeycomb core (ratio of radius-length), thickness of core layer and configuration of beetle elytron plate on the lateral compressive performance of the beetle elytron plates were studied and the optimization method for lateral compressive performance of the beetle elytron plates was proposed. The result shows that the lateral compression bearing capacity of EBEP is greater than that of MBEP, and both are greater than of HP. The lateral compression bearing capacity of the beetle elytron plate with six cylinders is about 25% higher than that of the HP without cylinders. The lateral compression bearing capacity of beetle elytron plate can be improved by increasing the thickness of plates. The results of the study will promote the application of beetle elytron plates in large-span spatial structures.
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Comprehensive analysis of the expression and prognosis for TFAP2 in human lung carcinoma
Caiqi Cheng,Zhisen Ai,Linyong Zhao 한국유전학회 2020 Genes & Genomics Vol.42 No.7
Background The TFAP2 family of transcription factors, regulating gene expression related to vertebrate evolution, have been studied extensively in human cancer. However, the distinct roles of each TFAP2 in the expression and prognostic significance of lung carcinoma have not been elucidated yet. Objective This study is aimed to identify the mRNA expression and prognostic value of TFAP2 family in human lung cancer. Methods The transcriptional and survival data of TFAP2s in patients with lung cancer were obtained via ONCOMINE, LinkedOmics, GEPIA, cBioPortal, Kaplan–Meier Plotter and Human Protein Atlas databases. Results The results showed that expression levels of TFAP2A and TFAP2C were higher in lung adenocarcinoma and squamous cell carcinoma tissues than in normal lung tissues, whereas no difference was found in the TFAP2B expression level. TFAP2A was related to an unfavorable overall survival in lung cancer and its upregulation was significantly related to the overall survival in patients with smoking, non-chemotherapy and non-radiotherapy. Conclusion This study implied that TFAP2A was a reliable prognostic factor, which could be a potential marker for improving survival and prognostic accuracy of lung cancer patients.
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