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- 저자 : ( Jiaqi Ge ) (검색결과 3 건)
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Hydrogen sulfide removal by copper sulfate circulation method
Yingwu Yin,Ge Yan,Huichao Weng,Jiaqi Yang,Weichao Bao,Yuxing Gao 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.8
Although copper sulfate (CuSO4) as a valuable desulfurizer is commonly used in the laboratory, it is not applied in industry due to its high cost and lack of practical regeneration method. In this study, a method for regeneration of the absorption product copper sulfide (CuS) under mild conditions is put forward. In the presence of sodium chloride (NaCl), CuSO4 could be regenerated smoothly in acid solution and be recycled for the absorption of hydrogen sulfide (H2S). Specifically, under the conditions of 0.30mol/L chloride ion (Cl−), 1.8% acidity at 323 K, for 5.5 h, the regeneration efficiency will be higher than 99%. Moreover, extensive experimental studies showed that the addition of Cl− would not observably influence the absorption efficiency of H2S. These results reveal the potential for developing a novel, efficient and low-cost desulfurization technology.
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( Yang Li ),( Gaochao Xu ),( Jiaqi Ge ),( Peng Liu ),( Xiaodong Fu ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.6
This paper studies a single-user Mobile Edge Computing (MEC) system where mobile device (MD) includes an application consisting of multiple computation components or tasks with dependencies. MD can offload part of each computation-intensive latency-sensitive task to the AP integrated with MEC server. In order to accomplish the application faultlessly, we calculate out the optimal task offloading strategy in a time-division manner for a predetermined execution order under the constraints of limited computation and communication resources. The problem is formulated as an optimization problem that can minimize the energy consumption of mobile device while satisfying the constraints of computation tasks and mobile device resources. The optimization problem is equivalently transformed into solving a nonlinear equation with a linear inequality constraint by leveraging the Lagrange Multiplier method. And the proposed dual Bi-Section Search algorithm Bi-JOTD can efficiently solve the nonlinear equation. In the outer Bi-Section Search, the proposed algorithm searches for the optimal Lagrangian multiplier variable between the lower and upper boundaries. The inner Bi-Section Search achieves the Lagrangian multiplier vector corresponding to a given variable receiving from the outer layer. Numerical results demonstrate that the proposed algorithm has significant performance improvement than other baselines. The novel scheme not only reduces the difficulty of problem solving, but also obtains less energy consumption and better performance.
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Performance study on the whole vibration process of a museum induced by metro
Weiguo Yang,Meng Wang,Jianquan Shi,Jiaqi Ge,Nan Zhang,Botao Ma 국제구조공학회 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.55 No.2
The vibrations caused by metro operation propagate through surrounding soil, further induce secondary vibrations of the nearby underground structures and adjacent buildings. In order to investigate the effects of vibrations caused by metro on use performance of buildings, vibration experiment of Chengdu museum was carried out firstly. Then, the coupling tunnel-soil-structure finite element model was established with software ANSYS detailedly, providing a useful tool for investigating the vibration performances of structures. Furthermore, the dynamic responses and vibration predictions of museum building were obtained respectively by the whole process time-domain analysis and frequency-domain analysis, which were compared with the vibration reference values of museum. Quantitative analyses of the museum building performance were carried out, and the possible tendency and changing laws of vibration level with floors were proposed. Finally, the related vibration isolation measures were compared and discussed. The tests and analysis results show that: The vertical vibration responses almost increased with the increasing of building floors, while weak floors existed for the curve of horizontal vibration; The vertical vibrations were larger than the horizontal vibrations, indicating the vibration performances of building caused by metro were characterized with vertical vibrations; The frequencies of the museum corresponding to the peak vibration levels were around 6~17Hz; The damping effect of structure with 33m-span cantilever on vertical vibration was obvious, however, the damping effect of structure with foundation vibration isolators was not obvious.
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