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- 저자 : Zhanli Jin (검색결과 83 건)
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Zhanli Jin,Yaowen Yang,Chee Kiong Soh 국제구조공학회 2010 Smart Structures and Systems, An International Jou Vol.6 No.7
In this paper, the optimal design of vibration control system for smart structures has been investigated semi-analytically via the optimization of geometric parameters like the placements and sizes of piezoelectric sensors and actuators (S/As) bonded on the structures. The criterion based on the maximization of energy dissipation was adopted for the optimization of the control system. Based on the sensing and actuating equations, the total energy stored in the system which is used as the objective function was analytically derived with design variables explicitly presented. Two cases of single and combined vibration modes were addressed for a simply supported beam and a simply supported cylindrical shell. For single vibration mode, the optimal distributions of the piezoelectric S/As could be obtained analytically. However, the Sequential Quadratic Programming (SQP) method has to be employed to solve those which violated the prescribed constraints and to solve the case of combined vibration modes. The results of three examples, which include a simply supported beam, a simply supported cylindrical shell and a simply supported plate, showed good agreement with those obtained by the Genetic Algorithm (GA) method. Moreover, in comparison with the GA method, the proposed method is more effective in obtaining better optimization results and is much more efficient in terms of computation time.
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Jin, Zhanli,Yang, Yaowen,Soh, Chee Kiong Techno-Press 2010 Smart Structures and Systems, An International Jou Vol.6 No.7
In this paper, the optimal design of vibration control system for smart structures has been investigated semi-analytically via the optimization of geometric parameters like the placements and sizes of piezoelectric sensors and actuators (S/As) bonded on the structures. The criterion based on the maximization of energy dissipation was adopted for the optimization of the control system. Based on the sensing and actuating equations, the total energy stored in the system which is used as the objective function was analytically derived with design variables explicitly presented. Two cases of single and combined vibration modes were addressed for a simply supported beam and a simply supported cylindrical shell. For single vibration mode, the optimal distributions of the piezoelectric S/As could be obtained analytically. However, the Sequential Quadratic Programming (SQP) method has to be employed to solve those which violated the prescribed constraints and to solve the case of combined vibration modes. The results of three examples, which include a simply supported beam, a simply supported cylindrical shell and a simply supported plate, showed good agreement with those obtained by the Genetic Algorithm (GA) method. Moreover, in comparison with the GA method, the proposed method is more effective in obtaining better optimization results and is much more efficient in terms of computation time.
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UV radiation pretreatment for reverse osmosis (RO) process in ultrapure water (UPW) production
Jin, Yongxun,Lee, Hyunkyung,Zhan, Min,Hong, Seungkwan Elsevier 2018 Desalination Vol.439 No.-
<P><B>Abstract</B></P> <P>In ultrapure water (UPW) production, ultraviolet (UV) radiation is an effective process for reducing microorganisms and organic matter. An increasing trend of reusing the spent UPW further encourages the adoption of UV at the upstream of reverse osmosis (RO) to mitigate membrane fouling and to enhance water quality. In this study, UV technology, both low and medium pressure lamps, was assessed for RO pretreatment in UPW production. The fouling potential of problematic pollutants (e.g., silica and IPA) was evaluated pre and post UV treatment based on fouling index under constant flux mode. We found that the rejection rate of IPA was enhanced up to 80% and thus reduced the organic fouling potential in RO. On the contrary, for inorganic nano-particle such as silica, a significant increase in fouling potential after UV exposure was observed. Zeta and small angle X-ray scattering analysis implied that this fouling potential transition was derived from silica particle agglomeration under UV radiation. The RO fouling tests corroborated findings from fouling index measurements, showing severe flux decline after UV radiation. This research provides new insight for UPW production design by revealing the influence of UV on inorganic and organic pollutants during the reclamation of spent UPW.</P> <P><B>Highlights</B></P> <P> <UL> <LI> UV radiation was evaluated as pretreatment for RO in reclamation of spent UPW. </LI> <LI> Fouling in RO was simulated by fouling index newly developed for UPW process. </LI> <LI> UV treatment effectively degraded low-molecular weight organic matter (IPA). </LI> <LI> UV dose is a dominant factor which controls the rise of silica fouling. </LI> <LI> Increased silica fouling was manifested by aggregation under UV exposure. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Zhan, Yi-Ping,Huang, Xin-En,Cao, Jie,Lu, Yan-Yan,Wu, Xue-Yan,Liu, Jin,Xu, Xia,Xu, Lin,Xiang, Jin,Ye, Li-Hong Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.9
Objectives: To assess the efficacy, side effects, and the impact on quality of life with $Qinin^{(R)}$ (Cantharidin sodium) injection combined with chemotherapy for gastric cancer patients. Method: A consecutive cohort of 70 patients were divided into two groups: experimental group with cantharidin sodium injection combined with chemotherapy, while the control group received chemotherapy alone. After more than two courses of treatment, efficacy, quality of life and side effects were evaluated. Results: The response rate of experimental group was not significantly different from that of the control group (P>0.05), but differences were significant in clinical benefit response and KPS score. In addition, gastrointestinal reactions and the incidence of leukopenia were lower than in the control group (P<0.05). Conclusions: $Qinin^{(R)}$ (Cantharidin sodium) injection combined with chemotherapy enhances clinical benefit response, improving quality of life of gastric cancer patients and reducing side effects of chemotherapy. Thus $Qinin^{(R)}$ (Cantharidin sodium) injection deserves to be further investigated in randomized control clinical trails.
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Zhan, Yi-Ping,Huang, Xin-En,Cao, Jie,Lu, Yan-Yan,Wu, Xue-Yan,Liu, Jin,Xu, Xia,Xiang, Jin,Ye, Li-Hong Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.10
Objective: To observe efficacy and side effects, as well as the impact on quality of life, of Kanglaite$^{(R)}$ (Coix Seed Oil) injections combined with chemotherapy in the treatment of advanced gastric cancer patients. Method: A consecutive cohort of 60 patients were divided into two groups: the experimental group receiving Kanglaite$^{(R)}$ Injection combined with chemotherapy and the control group with chemotherapy alone. After more than two courses of treatment, efficacy, quality of life and side effects were evaluated. Results: The response rate and KPS score of experimental group were significantly improved as compared with those of the control group (P<0.05). In addition, gastrointestinal reactions and bone marrow suppression were significantly lower than in the control group (P<0.05). Conclusions: Kanglaite$^{(R)}$ Injection enhanced efficacy and reduced the side effects of chemotherapy, improving quality of life of gastric cancer patients; use of Kanglaite$^{(R)}$ injections deserves to be further investigated in randomized control clinical trails.
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Zhan Xinyuan,She Zhixiang,Yue Zhengbo,Hu Fupeng,Wang Guangcheng,Wang Shaoping,Li Wei,Liu Bing,Wang Jin 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.1
Fe-doped g-C 3 N 4 has been proven to have the potential of visible light photocatalysis, but its catalytic activity of peroxymonosulfate (PMS) is neglected. Herein, the complex advanced oxidation processes of Fe-g-C 3 N 4 mediated PMS and visible light photocatalysis was developed, named as Vis/Fe-g-C 3 N 4 /PMS system, whose eff ects and synergistic mechanism for decomposing Rhodamine B (RhB) was evaluated. The coupling of sulfate radicals and photocatalysis for RhB degradation showed that the synergistic effi ciency ( η Syn ) and factor ( S c ) were 20.1% and 4.82, respectively, with a degradation effi ciency of 99.8%. Iron species dispersed on g-C 3 N 4 provided active sites for PMS activation to generate sulfate radicals, simultaneously reduced the forbidden band, and separated the photo-generated charges of g-C 3 N 4 . h + , SO 4 · ‾ and 1 O 2 were the main active species, and the increase of 1 O 2 was the cause of the synergistic eff ect. The possible degradation path of RhB by this coupling system was proposed. Our fi ndings prove that Vis/Fe-g-C 3 N 4 /PMS system has a great potential to decompose dye wastewater, and also to be an environmental remediation perspective.
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Lei Jin,Zhao-Yun Wang,Zhuan-Yun Cai,Jia-Qiang Yang,An-Ni Zheng,Fang-Zu Yang,De-Yin Wu,Dongping Zhan 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.125 No.-
In this work, we develop a novel 1-(2-Pyridylazo)-2-naphthol (PAN)-based acidic sulfate copper electronicelectroplating process for compact, homogeneous and conformal copper thickening of throughhole (TH). The adsorption characteristics, electrochemical properties and the interaction mechanismsof three additives (PEG, SPS and PAN) are studied in detail. Scanning electron microscope (SEM) and opticalmicroscope (OM) reveal that PAN can make the copper coating in fine grains and high throwing powerof 90.35% in TH without an overhang phenomenon. Theoretical calculations illustrate that the bindingenergies between additive molecules and copper surface decrease in the order: PAN > SPS > PEG. Cyclic voltammetry experiments at rotating rates of 1200 and 200 r/min prove that PAN itself can accelerateand weakly suppress copper electrodeposition at the center and mouth of TH, respectively. PANbehaves respectively the synergistic and antagonistic effects with PEG at the mouth and center of TH,and the weakly synergistic effects with SPS both at the mouth and center of TH. The addition of PANto the virgin make-up solution (VMS) containing PEG and SPS causes decreasing the relative electriccharge (DQ) at high and low rotating rates from 18.52 ± 0.08% to 8.25 ± 0.05%, which satisfies the closercopper electronic electroplating rate at the center and mouth of TH. The effective and complicated synergisticeffects of the additives PEG, SPS and PAN can achieve compact, homogeneous and conformal copperthickening of TH.
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FATIGUE ANALYSIS OF WELD REGION IN TORSION BEAM REAR SUSPENSION SYSTEM
Nan Zhan,Xiaochuan Zhang,Xulong Jin,Hongwei Cao 한국자동차공학회 2019 International journal of automotive technology Vol.20 No.2
Torsion beam rear suspension systems have been widely used in small passenger vehicles. However, welding can lead to local stress concentrations, residual stresses and other various defects, which affects the fatigue life of this system. In this paper, 3D digital image correlation (DIC) technique was used to measure the weld region deformation of a torsion beam rear suspension system in the bench test. The test results show that the obvious strain concentration occurred at the welding seam under the cyclic loading. The numerical simulation work by finite element analysis (FEA) has been done to predict the fatigue damage of the torsion beam rear suspension system. The simulation results show that the location of the fatigue crack was at the strain concentration region in the test work. The enhancement test was performed on a proving ground. The fatigure crack location of the torsion beam rear suspension system in the test automobile was coincident with the results by DIC and FEA. If the load conditions of bench tests are close to the road test, DIC is a useful method to predict the fatigue damage by the strain concentration. As a in lab test it would reduce the cost of fatigue analysis.
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