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Seismic stability limit analysis of unsaturated soil slopes reinforced by frame beam anchor plates
Anping Huang,Yanpeng Zhu,Shuaihua Ye,Long Wang,Junguo Peng,Guangwen Fang 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.9
The frame beam anchor plate (FBAP) reinforced slope has been popularized and applied in some fill slope projects. Nevertheless, the existing design method ignores the influence of earthquake action and the suction effect of unsaturated soils. The stability of unsaturated soil slopes reinforced with FBAPs under an earthquake is analyzed based on the upper bound theorem of limit analysis and pseudo-dynamic method to solve the above problems. The influence of the suction effect on the effective weight and strength of unsaturated soils under one-dimensional steady seepage conditions was considered in the derivation of the energy balance equation. A simplified method based on the volume integral of the rotating body is used to calculate the external work rate. Two possible failure modes of anchorage structures are considered when solving internal energy dissipation. Results show that the influence of suction and seepage conditions on slope stability decreases with the increasing soil pore size distribution parameter n and saturated hydraulic conductivity ks. Also, the stability of the slopes is significantly improved with the increase of total rows of anchor plates. Likewise, the stability of slopes decreases with the increase in the horizontal seismic coefficient kh and amplification coefficient fa.
Design of reverse osmosis networks for multiple freshwater production
Yanyue Lu,Anping Liao,Yangdong Hu 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.5
Reverse osmosis (RO) desalination, which produces multiple freshwater from seawater, has been studied in this work. An optimization method based on process synthesis has been applied to design the RO system. First, a simplified superstructure that contains all the feasible design for this desalination problem has been presented. In this structural representation, the stream split ratios and the logical expressions of stream mixing were employed, which can make the mathematical model easy to handle. Then, the membrane separation units employing the spiral wound reverse osmosis elements were described by using a pressure vessel model, which takes into account the pressure drop and the concentration changes in the membrane channel. The optimum design problem can be formulated as a mixedinteger non-linear programming (MINLP) problem, which minimizes the total annualized cost of the RO system. The cost equation relating the capital and operating cost to the design variables, as well as the structural variables, has been introduced in the objective function. The problem solution includes the optimal streams distribution, the optimal system structure and the operating conditions. The design method could also be used for the optimal selection of membrane element type in each stage and the optimal number of membrane elements in each pressure vessel. The effectiveness of this design methodology has been demonstrated by solving a desalination case. The comparisons with common industrial approach indicated that the integrative RO system proposed in this work is more economical, which can lead to significant capital cost and energy saving and provide an economically attractive desalination scheme.
Huaichang Sun,Lei Zhang,Anping Wang,Zhengfeng Xue 생화학분자생물학회 2004 Experimental and molecular medicine Vol.36 No.1
To evaluate the feasibility of treating hypertension by human tisue kallikrein gene (KLK1) delivery and by enzyme (rK1) administration, two recom-binant vectors expressing KLK1 cDNA were con-structed for gene delivery (pcDNA-KLK1) and recom-binant enzyme preparation (pOV-KLK1). Expres-confirmed by imunofluorescence and in sponta-neous hypertension rats (SHR) by enzymatic detec-tion. Following intramuscular or intravenous injec-tion with the pcDNA-KLK1 vector, systolic pres-sure of SHR was significantly decreased, which lasted for 20 d to two months depending on dose, route and/or time of injection. Eg white con-taining recombinant hK1 was prepared by injection of egg-laying hens with the oviduct-specific ex-pression vector pOV-KLK1 and administered into systolic pressure of the SHR was decreased to that of normal rats, which lasted for 3-5 d de-pending on the dosage used. These data sugest that both hKLK1 gene delivery and recombinant enzyme administration can be used as alternative strategies for treating human hypertension.
Dou Zhifeng,Wang Nan,Chen Zhinan,Zheng Anping,Lu Falong,Lv Zhongbin 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.2
Conventional Finite Control Set Model Predictive Control (FCS-MPC) suffers from large neutral point voltage fluctuation, cumbersome calculation process, as well as high current Total Harmonic Distortions for 3-level T-type grid-tied inverter. An improved FCS-MPC method is proposed in this paper by directly calculating the switch state’s cost function. This method uses the 3-phase switching state Sx to represent the load current i, the DC side neutral point voltage offset ΔUc, the load current prediction value i(k + 1), and establishes a real-time cost function g through 27 switching vectors. In the loop calculation, the switching vector is selected by minimizing the absolute value of the cost function g, and the output switching state is represented by the switching vector. Thus, the inverter can be switched ON or OFF depending on the stat of the next moment. The FCS-MPC of a 3-level T-type grid-tied inverter is also established by simulation, and the effectiveness of the proposed method is verified by experimental results.
Visible Luminescence of Tm3+, Er3+ and Yb3+ in Calcium-Aluminoborate Glasses
Zhisong Xiao,Lu Yan,Fang Zhu,Anping Huang 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.6
Tm, Er, and Yb codoped calcium-aluminoborate glasses were prepared. Intense visible luminescence was observed under excitation at a 325-nm wavelength. It was demonstrated that violet and blue luminescences (392, 454 and 478 nm) were mainly contributed by Tm3+, and green (514, 528 and 559 nm) and red (652 nm) luminescences were mainly contributed by Er3+. Energy transfer processes among Tm3+, Er3+, and Yb3+ were evidenced, in which various colors of the luminescence could be easily tuned by adjusting the concentration and the kind of the rare earth ions in glasses. Tm, Er, and Yb codoped calcium-aluminoborate glasses were prepared. Intense visible luminescence was observed under excitation at a 325-nm wavelength. It was demonstrated that violet and blue luminescences (392, 454 and 478 nm) were mainly contributed by Tm3+, and green (514, 528 and 559 nm) and red (652 nm) luminescences were mainly contributed by Er3+. Energy transfer processes among Tm3+, Er3+, and Yb3+ were evidenced, in which various colors of the luminescence could be easily tuned by adjusting the concentration and the kind of the rare earth ions in glasses.
Yali, Liang,Zhichao, Qiu,Yaohe, Li,Anping, Liu,Zhixiong, Chen,Huliwen, Huliwen,man, Luo,jing, He,Xiaoyang, Xiaoyang,Hai, Lan Techno-Press 2021 Advances in nano research Vol.10 No.6
Disseminated candidiasis (DC) arising from nosocomial fungal infection is a life-threatening complication in critically ill, nonneutropenic patients. The overall nosocomial fungal infection rate in United States hospitals doubled from 1980-1990. Until recently, amphotericin B was the only agent available for the treatment of life-threatening candidal infections, but its use is plagued by toxicities including nephrotoxicity and infusion-related reactions such as rigors and hypotension. The availability of fluconazole, which is regarded more much less toxic than amphotericin B, prompted a surge in research to determine if it is as efficacious in the management of candidemia and hematogenously disseminated candidiasis. Complicating the interpretation of studies is the broad range of infection severity, from candidemia that may be transient and self-limiting to life-threatening hematogenously disseminated candidiasis. This study has used the models of Artificial neural network (ANN) and Support Vector regression (SVR) to accurately assess the clinical trials comparing fluconazole and amphotericin B demonstrate the efficacy of fluconazole for catheter-associated candidemia in critically ill patients when the likely pathogen is Candida albicans. As a result, Amphotericin B should remain the first-line agent for the management of candidemia and hematogenously disseminated candidiasis in all other patients. Also, SVR could accurately assess the efficacy of fluconazole for catheter-associated candidemia in critically ill patients.