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Xiaolu Li,Xiaomin Xue,Ling Zhang,Xueming Wang,Huchang Wang 한국강구조학회 2019 International Journal of Steel Structures Vol.19 No.5
Adding ring-stiff eners is an eff ective strategy for strengthening CHS tubular joints. However, research on the capacity of ring-stiff ened CHS tube-gusset joints remains limited. In this study, we performed experimental and numerical analyses to derive static strength equations for this joint. For convenience, we simplifi ed the complex joint model into a ring plate to CHS joint, which consisted of a CHS tube and a ring-stiff ener. First, we tested fi ve specimens to obtain failure mode and ultimate strength. Second, a fi nite element model was established and validated by the experimental results. Then, we used the verifi ed numerical method to simulate the behavior of the ring plate to CHS joint. A wide range of geometric parameters was considered, and the relevant design guide was assessed. Finally, nonlinear analysis was performed, and a design formula was proposed. Good agreement was achieved between the proposed design formula and the results of experimental and numerical analyses.
Bicai Xu,Xupeng Wang,Xiaomin Ji,Ruiting Tong,Yanmin Xue 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.7
The aim of the research was to introduce a methodology for dynamic response and motion consistency research on multibody system with multiple revolute clearance joints. An improved impact force model and a modified friction force model were introduced to evaluate the effects of impact and friction in clearance joints. A planar parallel mechanism which has two clearance joints in the left wing and the right wing was also used as an example. From the results based on different conditions, clearance has slight influence on the angular displacement and angular velocity, but obvious effect on angular acceleration. And with same clearance values of left wing and right wing, the motion consistency of the parallel mechanism is very good, which means the dynamic response of two wings is almost symmetrical. When the two clearance joints have different clearance values, the motion consistency and relative error between two wings are much obvious, especially the angular acceleration.
Changes in Protein Phosphorylation during Salivary Gland Degeneration in Haemaphysalis longicornis
Qi Xiao,Yuhong Hu,Xiaohong Yang,Jianna Tang,Xiaoshuang Wang,Xiaomin Xue,Mengxue Li,Minjing Wang,Yinan Zhao,Jingze Liu,Hui Wang 대한기생충학ㆍ열대의학회 2020 The Korean Journal of Parasitology Vol.58 No.2
The ticks feed large amount of blood from their hosts and transmit pathogens to the victims. The salivary gland plays an important role in the blood feeding. When the female ticks are near engorgement, the salivary gland gradually loses its functions and begins to rapidly degenerate. In this study, data-independent acquisition quantitative proteomics was used to study changes in the phosphorylation modification of proteins during salivary gland degeneration in Haemaphysalis longicornis. In this quantitative study, 400 phosphorylated proteins and 850 phosphorylation modification sites were identified. Trough RNA interference experiments, we found that among the proteins with changes in phosphorylation, apoptosis-promoting Hippo protein played a role in salivary gland degeneration.