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RISS 인기검색어
- 검색키워드
- 저자 : Yihui Yu (검색결과 4 건)
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Separating paint mist from paint spraying waste gas: mechanism, model and application
Yihui Zhou,Xi He,Wang Li,Tao Xu,Dong Xie,Xin Dai,Zhang Liu,Hanqing Wang,Gang Yu 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.5
The paint spraying waste gas contains a large amount of paint mist, volatile organic compounds (VOCs) and other hazardous materials, which seriously affects human health and atmospheric environment. Paint mist cannot be separated from paint spraying waste gas effectively by the existing dry filtration methods because of the filter blocking. A new separation process and a novel coupling device with high separation efficiency have been developed. A numerical model was established to optimize the structure and operation parameters of the baffle interceptor by hydrodynamics method which verified by the coupling device experiment. From the simulating results, when plate spacing was 20 ㎜, folding angle was 90° and airflow velocity was up to 8 ㎧, the separation efficiency of paint mist with the diameter of 15 ㎛ was 84.7% and the pressure drop of the baffle interceptor was 220.2 ㎩. Experiment was conducted under the above-optimized conditions, and the results showed that the pressure drop of the baffle interceptor was 303.33 ㎩, and the paint mist separation efficiencies of the baffle interceptor and the interception-filtration coupling device were 78.34% and 96.38%, respectively.
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A new reconfigurable liquid-metal-antenna-based sensor
Xiao-Ping Zhou,Yihui Fu,Hantao Zhu,Zihao Yu,Shanyong Wang 국제구조공학회 2022 Smart Structures and Systems, An International Jou Vol.30 No.4
In this paper, a new sensor chip with frequency reconstruction range of 2.252 GHz ~ 2.450 GHz is designed and fabricated. On this basis, a self-designed "T-shaped" shell is added to overcome the disadvantage of uneven deformation of the traditional steel shell, and the range of the sensor chip is expanded to 0 kN ~ 96 kN. The liquid metal antenna is used to carry out a step-by-step loading test, and the relationship between the antenna resonance frequency and the pressure load is analyzed. The results show that there is a good linear relationship between the pressure load and the resonant frequency. Therefore, the liquid metal antenna can be regarded as a pressure sensor. The cyclic loading and unloading experiments of the sensor are carried out, and different loading rates are used to explore the influence on the performance of the sensor. The loading and unloading characteristic curves and the influence characteristic curves of loading rate are plotted. The experimental results show that the sensor has no residual deformation during the cycle of loading and unloading. Moreover, the influence of temperature on the performance of the sensor is studied, and the temperature correction formula is derived.
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Treatment of Oily Wastewater with WPO and CWO
Han, Mei,Chen, Yihui,He, Fang,Yu, Li Korean Chemical Society 2014 대한화학회지 Vol.58 No.1
Petroleum refining unavoidably generates large volumes of oily wastewater. The environmentally acceptable disposal of oily wastewater is a current challenge to the petroleum industry. Nowadays, more attentions have been focused on the treatment techniques of oily wastewater. Oily wastewater contained highly concentrated and toxic organic compounds. Wet peroxide oxidation (WPO) and catalytic wet oxidation (CWO) were applied to eliminate pollutants to examine the feasibility of the WPO/CWO of oily wastewater. The results indicated that more than 80% chemical oxygen demand (COD) removal from oily wastewater was achieved with CWO. Homogenous catalyst, $NaHCO_3$ and $Na_2CO_3$ and NaOH showed effective removal for pollutants in oily wastewater. Greater than 90% COD removal was achieved with WPO. It was concluded that WPO was a far more effective process for oily wastewater.
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Jingwei Zhang,,Nabil Ebraheim,Ming Li,Xianfeng He,Jiayong Liu,Limei Zhu,Yihui Yu 대한정형외과학회 2015 Clinics in Orthopedic Surgery Vol.7 No.1
Background: The locking plates are often used for internal fixation of closed tibial fractures. The use of a locking plate as an externalfixator is still controversial, particularly for closed fractures. The purpose of this study is to evaluate the results of externalfixation using the femoral less invasive stabilization system (LISS) plate in proximal metaphyseal fractures of the tibia. Methods: We prospectively evaluated 35 patients (26 males and 9 females) with a mean age of 42 years (range, 21 to 62 years)who presented with fresh tibial proximal metaphyseal fractures. According to the AO Foundation and Orthopaedic Trauma Association(AO/OTA) classification, the fractures were identified as type 41-A2 in 18 cases and type 41-A3 in 17 cases, including 25closed fractures and 10 open fractures. The femoral LISS plate was used to fix these fractures, which was placed on the anteromedialaspect of the tibia as an external fixator. The mean follow-up period was 18 months (range, 13 to 22 months). Results: All fractures healed in a mean time of 14 weeks (range, 10 to 20 weeks). There was no case of nonunion, deep infection,and loosening of screws and plates. One month after the appearance of cortical bridging on biplanar radiographs, the locking platewas removed within 3 minutes in the clinic without any difficulty. According to the Hospital for Special Surgery (HSS) knee scoringsystem and American Orthopaedic Foot & Ankle Society (AOFAS) ankle scoring system, the mean HSS score was 91 (range, 85 to100) and 98 (range, 93 to 100), and the mean AOFAS score was 94 (range, 90 to 100) and 98 (range, 95 to 100) at 4 weeks postoperativelyand final follow-up, respectively. Conclusions: For proximal metaphyseal fracture of the tibia, external fixation using the femoral LISS plate is a safe and reliabletechnique with minimal complications and excellent outcomes. Its advantages include ease of performing the surgery, use of a lessinvasive technique, and convenience of plate removal after fracture healing.
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