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| 1 | Flow-structure interaction of an inverted flag in a water tunnel显示文摘Herein, the dynamics and flow fields of an inverted flag are studied using hydrogen bubble flow visualization and particle image velocimetry technologies at different height-to-length ratios and flow velocities in a water tunnel. Results show that the heightto-length ratio of the inverted flag at which the critical flow velocity remains nearly constant is approximately 1.4. Moreover, a nonperiodic flapping phenomenon is observed under various height-to-length ratios. This phenomenon may be attributed to the existence of multiple equilibrium solutions to the self-excited vibration system, thus engendering chaos in the system comprising an inverted flag and surrounding fluid. Other indications that the system has entered chaos include multiple frequencies, nonoverlapping phase diagram, and positive Lyapunov exponent. Further discussion of the flow fields around the inverted flag reveals that the large-amplitude oscillation is due to the flow separation, while the flapping instability is a static divergence instability. In the large flapping mode, the starting leading-edge vortex(LEV) is wrapped by Kelvin-Helmholtz instabilities,which are arranged at almost uniform spacing along a circular path. In addition, the variation in position, circulation, and radius of the starting LEV are discussed in detail. | YaoWei Hu JiangSheng Wang JinJun Wang Christian Breitsamter | 2019 | Science China(Physics,Mechanics & Astronomy)2019,62,12: | 1 |
| 2 | Efficiency analysis of sorption-enhanced method in steam methane reforming process显示文摘The sorption-enhanced method can change the thermodynamic equilibrium by absorbing CO_(2).However,it also brings about the problems of high regeneration temperature of adsorbent and large regeneration energy consumption.In order to study the impact of enhanced adsorption methods on the overall energy cost of the system in the hydrogen production process,this paper analyzes and compares steam methane reforming and reactive adsorption-enhanced steam methane reforming with the energy consumption of hydrogen production products as the evaluation index.The results showed that the energy consumption per unit hydrogen production decreased from 276.21 MJ/kmol to 131.51 MJ/kmol,and the decomposition rate of H2O increased by more than 20%after the addition of adsorption enhancement method.It is proved that the advantage of sorption enhanced method on pre-separation of CO_(2)in the product makes up for the disadvantage of energy consumption of adsorbent regeneration.In addition,the ability of the process to obtain H element is improved by the high decomposition rate of H2O,which realizes a more rational distribution of the element. | Yaowei Hu Lu Liu Kai Xu Yuncai Song Jieying Jing Huiyan Zhang Jie Feng | 2023 | Carbon Resources Conversion2023,6,2: | 0 |
| 3 | Treatment of Retroperitoneal Cavernous Lymphangioma: A Case Report显示文摘A 32-year-old man who complained of recurrent nauseat and vomiting was admitted to our hospital.The contrast-enhanced computed tomography revealed a cystic mass located behind the duodenum which was suggestive of lymphangioma.Laparoscopic resection of the retroperitoneal mass was successfully performed.The postoperatively pathological examination confirmed the diagnosis of cavernous lymphangioma.Ultrasound and enhanced CT can be used for making a preoperative diagnosis.Once symptoms of the disease develop,complete surgical resection should be performed. | Xiaolei Wang Shanshan Meng Kehang Duan Yaowei Hu Feng Wei | 2020 | Chinese Medical Sciences Journal2020,35,3: | 0 |
| 4 | Enrichment of anchoring sites by introducing supramolecular halogen bonds for the efficient perovskite nanocrystal LEDs显示文摘Considering the multi-functionalization of ligands,it is crucial for ligand molecular design to reveal the landscape of anchoring sites.Here,a typical triphenylphosphine(TPP)ligand was employed to explore its effect on the surface of CsPbI_(3)perovskite nanocrystals(PNCs).Except for the conventionally considered P-Pb coordination,an P-I supramolecular halogen bonding was also found on the NC surface.The coexistence of the above two types of bonding significantly increased the formation energy of iodine vacancy defects and improved the photoluminescence quantum yield of PNCs up to 93%.Meanwhile,the direct interaction of P and I enhanced the stability of the Pb-I octahedra and dramatically inhibited the migration of I ions.Furthermore,the introduction of additional benzene rings(2-(Diphenylphosphino)-biphenyl(DPB))increased the delocalized properties of the PNC surface and significantly improved the charge transport of the PNCs.As a result,the DPB passivated CsPbI_(3)NCs based top-emitting LEDs exhibite a peak external quantum efficiency(EQE)of 22.8%,a maximum luminance of 15,204 cd m^(−2),and an extremely low-efficiency roll-off of 2.6%at the current density of 500 mA cm^(−2). | Po Lu Ting Li Min Lu Cheng Ruan Siqi Sun Zhennan Wu Yuan Zhong Fujun Zhang Yanbo Gao Yaowei Huang Yang Wang Junhua Hu Fengping Yan Yu Zhang | 2023 | Light(Science & Applications)2023,12,10: | 0 |
| 5 | Lck/Hck/Fgr介导的TBK1酪氨酸磷酸化负调TBK1功能及抗病毒天然免疫应答显示文摘抗病毒天然免疫通路的激活,传统上认识是由蛋白泛素化和蛋白丝苏氨酸磷酸化所介导,对于蛋白酪氨酸磷酸化修饰的作用与生理功能,未有深入探索和认知。课题组发现病毒感染过程中,在多种器官来源的细胞中都观察到细胞内源TBK1有动态的酪氨酸磷酸化修饰,并与TBK1激活与抑制紧密相关。 | Shengduo Liu Shasha Chen Xinran Li Shiying Wu Qian Zhang Qiuheng Jin Lin Hu Ruyuan Zhou Zhengyang Yu Fansen Meng Siwen Wang Yaowei Huang Sheng Ye Li Shen Zongping Xia Jian Zou Xin-Hua Feng 徐平龙 | 2018 | 科学新闻2018,0,4: | 0 |