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学者姓名:郭烈锦

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< Page ,Total 89 >
Intelligent identification of steam jet condensation regime in water pipe flow system by wavelet multiresolution analysis of pressure oscillation and artificial neural network EI Scopus SCIE
期刊论文 | 2019 , 147 , 1047-1058 | Applied Thermal Engineering
SCOPUS Cited Count: 2
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Abstract :

© 2018 Elsevier Ltd On-line recognition of condensation regime of vapor jet in pipe flow systems is a promising approach for flow assurance and intellectualization of industrial processes. However, the selection of distinguishable characteristics from pressure signals associated strongly with various condensation regimes is essential and challenging for satisfactory recognition purpose. Accordingly, an artificial neural network technique using wavelet multiresolution analysis of pressure oscillation signals for objective identification of jet condensation regimes is presented in this paper. The recognition procedure was carried out in two major steps. Statistical features of wavelet multiresolution analysis of pressure signals, i.e., mean of absolute and percentage of energy of each wavelet scale, were chose first. And then artificial neural network was adopted to construct classifiers for forecasting the condensation regimes automatically. The recognition results illustrated that the proposed method is feasible and effective for identifying vapor jet condensation regime in pipe flow system. Furthermore, it is suggested that statistical features of mean of absolute and percentage of energy at least four or more particular wavelet scales, and also sample length longer than 1.5 s could guarantee a satisfactory recognition rate above 90%.

Keyword :

Artificial neural network Condensation regime recognition Multiphase flow Pressure oscillation Wavelet multiresolution analysis

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GB/T 7714 Xu, Qiang , Ye, Shuyan , Liu, Weizhi et al. Intelligent identification of steam jet condensation regime in water pipe flow system by wavelet multiresolution analysis of pressure oscillation and artificial neural network [J]. | Applied Thermal Engineering , 2019 , 147 : 1047-1058 .
MLA Xu, Qiang et al. "Intelligent identification of steam jet condensation regime in water pipe flow system by wavelet multiresolution analysis of pressure oscillation and artificial neural network" . | Applied Thermal Engineering 147 (2019) : 1047-1058 .
APA Xu, Qiang , Ye, Shuyan , Liu, Weizhi , Chen, Yanshuang , Chen, Qiyu , Guo, Liejin . Intelligent identification of steam jet condensation regime in water pipe flow system by wavelet multiresolution analysis of pressure oscillation and artificial neural network . | Applied Thermal Engineering , 2019 , 147 , 1047-1058 .
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Mathematical model for coal conversion in supercritical water: reacting multiphase flow with conjugate heat transfer EI Scopus
期刊论文 | 2018 | International Journal of Hydrogen Energy
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Abstract :

Providing heat for supercritical water gasification (SCWG) of coal by coupling subsequent products oxidation in integrated supercritical water reactor (ISWR) provides an effective method for directional control of temperature field and avoids excessive hot spots caused by uniform heating. An exploratory numerical model incorporating particle-fluid flow dynamics, multispecies transport and thermal coupling between endothermic coal gasification and exothermic product oxidation was established to simulate the reacting multiphase flow process of coal conversion in a novel lab-scale ISWR. An eleven-lump kinetic model was proposed for the prediction of chemical reactions. And the thermal coupling relationship was described by conjugate heat transfer boundary conditions (BC). Detailed physical and chemical field distribution in ISWR were analyzed and influence factors were discussed. The results showed that oxidation of gas products as inner heat source could promote the gasification reaction with only slight or even little maximum temperature increase of the pressure-bearing wall. Coal feeding rate and oxygen supply method significantly affected the field distribution. The multi-injection compressed-air supply method provided a more uniform temperature field but would reduce heat transfer temperature difference. The carbon gasification efficiency (CGE) in the gasification zone could easily reach up to 97% under mild conditions (less than 650 °C). © 2018 Hydrogen Energy Publications LLC

Keyword :

Coal conversion Conjugate heat transfer Multi-species transports Reacting multiphase flow Supercritical water gasification (SCWG) Supercritical water reactors Temperature differences Uniform temperature field

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GB/T 7714 Ou, Zhisong , Jin, Hui , Ren, Zhenhua et al. Mathematical model for coal conversion in supercritical water: reacting multiphase flow with conjugate heat transfer [J]. | International Journal of Hydrogen Energy , 2018 .
MLA Ou, Zhisong et al. "Mathematical model for coal conversion in supercritical water: reacting multiphase flow with conjugate heat transfer" . | International Journal of Hydrogen Energy (2018) .
APA Ou, Zhisong , Jin, Hui , Ren, Zhenhua , Zhu, Shixing , Song, Mengmeng , Guo, Liejin . Mathematical model for coal conversion in supercritical water: reacting multiphase flow with conjugate heat transfer . | International Journal of Hydrogen Energy , 2018 .
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Study on Bubble Interaction on TiO2 Photoelectrode EI Scopus CSCD PKU
期刊论文 | 2018 , 39 (3) , 550-554 | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
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Abstract :

In this study, the interaction of bubbles evolving on TiO2photoanode is experimentally studied. It is found that the bubbles generated in the center of reaction zone attract the bubbles nucleated on the surface defect, resulting in bubble collision and coalescence. Marangoni convection is analyzed to play an important role in the bubble interaction. When the bubble coalescence occurs, the bubble evolving cycles become shorter and stable, which increases the bubble evolving efficiency and further reduces the saturation on the surface as well as the overpotential. © 2018, Science Press. All right reserved.

Keyword :

Bubble coalescence Bubble collision Bubble interaction Gas evolution Marangoni convection Marangoni effects Photoelectrochemical water splitting Photoelectrode

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GB/T 7714 Chen, Juan-Wen , Guo, Lie-Jin , Hu, Xiao-Wei et al. Study on Bubble Interaction on TiO2 Photoelectrode [J]. | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (3) : 550-554 .
MLA Chen, Juan-Wen et al. "Study on Bubble Interaction on TiO2 Photoelectrode" . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 39 . 3 (2018) : 550-554 .
APA Chen, Juan-Wen , Guo, Lie-Jin , Hu, Xiao-Wei , Cao, Zhen-Shan . Study on Bubble Interaction on TiO2 Photoelectrode . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (3) , 550-554 .
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Numerical Investigation on the Two Phase Flow Behaviors in Supercritical Water Fluidized Bed with Swirling Flow Distributor EI Scopus CPCI-S SCIE
期刊论文 | 2018 , 39 (17-18) , 1593-1604 | Heat Transfer Engineering
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Abstract :

Supercritical water fluidized bed reactor is a promising in the clean and efficient conversion of coal, and the distributor is one of the key component for the heat and mass transfer enhancement. However, the optimization study for the distributor in supercritical water fluidized bed reactor has been seldom conducted due to the special thermal properties of supercritical water. In this work, the swirling flow distributor was designed for its optimization for heat and mass transfer inside a supercritical water fluidized bed reactor. The swirling flow can be generated by the concentric circle or triangle type hole distribution in distributor with 0 or 45° intersection angle between the fluid inlet velocity direction and the distributor plane. The computational particle fluid dynamics (SCWFB) method, which has quick calculating speed and high accuracy, was used in this work to study the particle-fluid two-phase flow behaviors inside SCWFB with swirling flow distributors. Investigations were made to reveal the influence of the hole distribution type and intersection angle on the bed pressure drop and particle volume fraction characteristics. The results showed that the triangle type distributor with 45° intersection angle has the best fluidization performance. The conclusions drawn may has potential application for continuous and stable operation of supercritical water fluidized bed reactor for coal gasification. © 2017 Taylor & Francis Group, LLC

Keyword :

Concentric circles Fluidized bed reactors Heat and mass transfer Intersection angles Numerical investigations Optimization studies Particle volume fractions Supercritical water

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GB/T 7714 Jin, Hui , Wu, Zhenqun , Guo, Liejin et al. Numerical Investigation on the Two Phase Flow Behaviors in Supercritical Water Fluidized Bed with Swirling Flow Distributor [J]. | Heat Transfer Engineering , 2018 , 39 (17-18) : 1593-1604 .
MLA Jin, Hui et al. "Numerical Investigation on the Two Phase Flow Behaviors in Supercritical Water Fluidized Bed with Swirling Flow Distributor" . | Heat Transfer Engineering 39 . 17-18 (2018) : 1593-1604 .
APA Jin, Hui , Wu, Zhenqun , Guo, Liejin , Su, Xiaohui . Numerical Investigation on the Two Phase Flow Behaviors in Supercritical Water Fluidized Bed with Swirling Flow Distributor . | Heat Transfer Engineering , 2018 , 39 (17-18) , 1593-1604 .
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Experimental study on oil-containing wastewater gasification in supercritical water in a continuous system EI Scopus
期刊论文 | 2018 | International Journal of Hydrogen Energy
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Abstract :

Recently, promising multi-fluid thermal stimulation technology has been studied and applied successfully to the offshore heavy oil recovery process. However, there are still some shortcomings, including heavy reliance on diesel, heavy and bulky water pretreatment plant, etc., which hinders the further industrialization process of the current generation system of thermal multi-fluid. A novel thermal multi-fluid generation technology to decrease reliance on diesel was presented in this paper. In this technology, oil-containing wastewater can be used directly as the material and energy source. Increased attention should be given to the supercritical water gasification (SCWG) process as the core of this novel technology. An experimental study on SCWG of diesel, a representative of oil-containing wastewater, was described detailly in this paper. Experiments were conducted in a continuous SCWG system under different experimental conditions, as follows: pressure of 23 MPa; reaction temperature of 600 °C–680 °C; mass ratios of water to diesel in emulsification of 1:1, 1:2.5, and 1:3.5; and reactor diesel concentration (RDC) of 4.70 wt% to 7.70 wt%. The effects of alkali catalyst (K2CO3) on gaseous and liquid products were also investigated. A simplified gasification mechanism in SCW was obtained, which may provide a theory basis for the novel thermal multi-fluid generation technology based on oil-containing wastewater gasification in supercritical water. © 2018 Hydrogen Energy Publications LLC

Keyword :

Alkali catalysts Diesel Experimental conditions Generation technologies Heavy oil recovery process Multi-fluids Supercritical water gasification Supercritical water gasification (SCWG)

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GB/T 7714 Xu, Jialing , Kou, Jiajing , Guo, Liejin et al. Experimental study on oil-containing wastewater gasification in supercritical water in a continuous system [J]. | International Journal of Hydrogen Energy , 2018 .
MLA Xu, Jialing et al. "Experimental study on oil-containing wastewater gasification in supercritical water in a continuous system" . | International Journal of Hydrogen Energy (2018) .
APA Xu, Jialing , Kou, Jiajing , Guo, Liejin , Jin, Hui , Peng, Zhiyong , Ren, Changyifan . Experimental study on oil-containing wastewater gasification in supercritical water in a continuous system . | International Journal of Hydrogen Energy , 2018 .
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Investigation and prediction of severe slugging frequency in pipeline-riser systems EI SCIE Scopus
期刊论文 | 2018 , 184 , 72-84 | CHEMICAL ENGINEERING SCIENCE
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Abstract :

Severe slugging is one of the flow assurance concerns in oil and gas industry because of the undesired fluctuations of pressure and flow rates in the system. Knowledge of severe slugging frequency is essential for the receiving facility design. However, unlike the considerable investigations of normal slug frequency in horizontal and inclined pipes, little work has been done to predict severe slugging frequency. In this work, an experimental study of air-water two-phase flow was conducted in a long pipeline-riser system. According to the riser pressure drop signals and the power spectral density (PSD) distributions, flow patterns were classified into classical severe slugging, transitional severe slugging, oscillating flow and stable flow. The effect of riser-top choking on classical and transitional severe slugging frequency were analyzed. Based on a broad range experimental database from ten flow loops, the effect of dimensionless pipeline length on severe slugging frequency was analyzed and an empirical correlation was developed to predict severe slugging frequency. Good matches with literature data demonstrated the validation of the empirical correlation. The severe slugging frequency correlation was applied to predict severe slugging length and derive a new transition criterion between classical severe slugging and transitional severe slugging in the flow pattern map. (C) 2018 Elsevier Ltd. All rights reserved.

Keyword :

Transition criterion Severe slugging frequency Riser-top choking Empirical correlation

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GB/T 7714 Zhou, Hongliang , Guo, Liejin , Yan, Han et al. Investigation and prediction of severe slugging frequency in pipeline-riser systems [J]. | CHEMICAL ENGINEERING SCIENCE , 2018 , 184 : 72-84 .
MLA Zhou, Hongliang et al. "Investigation and prediction of severe slugging frequency in pipeline-riser systems" . | CHEMICAL ENGINEERING SCIENCE 184 (2018) : 72-84 .
APA Zhou, Hongliang , Guo, Liejin , Yan, Han , Kuang, Shicai . Investigation and prediction of severe slugging frequency in pipeline-riser systems . | CHEMICAL ENGINEERING SCIENCE , 2018 , 184 , 72-84 .
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Investigation on Steam Jet Condensation Regime in Water Flow in a Vertical Pipe System EI
期刊论文 | 2018 , 39 (8) , 1738-1743 | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
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Abstract :

The steam jet condensation regime in water flow in a vertical pipe system was investigated experimentally. The pressure wave induced by steam jet condensation was captured by several pressure transducers with high frequency, which are mounted on the wall of the vertical pipe. The statistical features of condensation pressure oscillation which is highly correlated to different jet condensation regimes were obtained. The absolute variance of pressure oscillation could be applied to quantitatively categorize different jet condensation regimes including Chugging, Oscillation condensation I, \Oscillation condensation II/Stable" regimes. After that, Oscillation condensation II regime could be simply isolated from the \Oscillation condensation II/Stable" via comparison of the the absolute variance of pressure oscillation in these two regimes. The condensation regime diagram obtained from low ambient pressure can be applied to predict regimes classification at elevated ambient pressure. © 2018, Science Press. All right reserved.

Keyword :

Ambient pressures Condensation pressure High frequency HF Highly-correlated Pressure oscillation Regime diagram Statistical features Steam jet

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GB/T 7714 Ye, Shu-Yan , Xu, Qiang , Guo, Lie-Jin et al. Investigation on Steam Jet Condensation Regime in Water Flow in a Vertical Pipe System [J]. | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (8) : 1738-1743 .
MLA Ye, Shu-Yan et al. "Investigation on Steam Jet Condensation Regime in Water Flow in a Vertical Pipe System" . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 39 . 8 (2018) : 1738-1743 .
APA Ye, Shu-Yan , Xu, Qiang , Guo, Lie-Jin , Chen, Qi-Yu , Chen, Yan-Shuang . Investigation on Steam Jet Condensation Regime in Water Flow in a Vertical Pipe System . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (8) , 1738-1743 .
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Investigation on Characteristics of Bubble Nucleation, Growth and Detachment During Photochemical Catalysis EI
期刊论文 | 2018 , 39 (7) , 1488-1492 | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
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Abstract :

Bubble dynamics in photochemical catalysis process is an important parameter to study gas-liquid two phase flow behavior, which has a significant effect on the efficiency of water splitting and the heat and mass transfer during the reaction process. In this paper, an experimental system to investigate the dynamic characteristics of O2 bubbles envolved from the TiO2 photoelectrode surface is designed. The law of O2 bubble evolution followed d ∝ tx, which x equaled to 0.5~0.85 within bubble formation 10 ms, and x ≈ 0.33 after 10 ms. The images of bubble nucleation initial stage were captured. The bubble nucleation spatiotemporal scale was obtained by optical method. Finally, the influence of laser power and constant bias on bubble detachment diameter was also presented. © 2018, Science Press. All right reserved.

Keyword :

Bubble growth Bubble nucleation Detachment diameter Oxygen bubbles Photoelectrode

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GB/T 7714 Cao, Zhen-Shan , Guo, Lie-Jin , Wang, Ye-Chun et al. Investigation on Characteristics of Bubble Nucleation, Growth and Detachment During Photochemical Catalysis [J]. | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (7) : 1488-1492 .
MLA Cao, Zhen-Shan et al. "Investigation on Characteristics of Bubble Nucleation, Growth and Detachment During Photochemical Catalysis" . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 39 . 7 (2018) : 1488-1492 .
APA Cao, Zhen-Shan , Guo, Lie-Jin , Wang, Ye-Chun , Hu, Xiao-Wei , Chen, Juan-Wen . Investigation on Characteristics of Bubble Nucleation, Growth and Detachment During Photochemical Catalysis . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (7) , 1488-1492 .
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Numerical Study on Flow and Heat Transfer of Supercritical Water Injection in Wellbores EI
期刊论文 | 2018 , 39 (10) , 2213-2218 | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
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Abstract :

With the gradual depletion of the world's oil and gas resources, heavy oil recovery has become increasingly important. Supercritical water flooding is a promising enhanced oil recovery technology because it could enhance deep extra heavy oil recovery and in-situ upgrade the recovered oil. It is critical to predict the injection parameters to make the pilot program of supercritical water injection. In this paper, a computational model has been developed for predicting supercritical water injection in wellbores. Frictional pressure drop correlations are selected according to different flow patterns. For single-phase flow of supercritical water, resistance coefficients in critical area are modified. The calculation results agree well with the field test results. And the influences of injection parameters on flow and heat transfer are analyzed. © 2018, Science Press. All right reserved.

Keyword :

Calculation results Computational model Enhanced oil recovery Frictional pressure drops Injection parameters Resistance coefficients Supercritical water Wellbore

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GB/T 7714 Zhao, Qiu-Yang , Wang, Ye-Chun , Zou, Sui-Feng et al. Numerical Study on Flow and Heat Transfer of Supercritical Water Injection in Wellbores [J]. | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (10) : 2213-2218 .
MLA Zhao, Qiu-Yang et al. "Numerical Study on Flow and Heat Transfer of Supercritical Water Injection in Wellbores" . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics 39 . 10 (2018) : 2213-2218 .
APA Zhao, Qiu-Yang , Wang, Ye-Chun , Zou, Sui-Feng , Huang, Zu-Jie , Chen, Lei , Guo, Lie-Jin . Numerical Study on Flow and Heat Transfer of Supercritical Water Injection in Wellbores . | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics , 2018 , 39 (10) , 2213-2218 .
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Facet-Selective Growth of Cadmium Sulfide Nanorods on Zinc Oxide Microrods: Intergrowth Effect for Improved Photocatalytic Performance EI SCIE Scopus
期刊论文 | 2018 , 10 (1) , 153-158 | CHEMCATCHEM
WoS CC Cited Count: 9 SCOPUS Cited Count: 9
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Abstract :

Well-designed architectures play an important role in accelerating charge transfer between the different components of hybrid photocatalysts. Herein, we report a simple one-step hydrothermal method to achieve a CdS/ZnO heterostructure with a novel spatial arrangement. The CdS nanorods were found to be attached to the surface of the ZnO microrods with an intimate face-to-face contact, and the heterointerfaces corresponded to {100} facets of CdS and {100} facets of ZnO. It was discovered that Zn(OH)(2) intermediates were formed at first and then grew into hexagonal ZnO microrods through a solid-solid-phase transformation. Simultaneously, CdS nuclei grew to nanorods on the {100} facets of ZnO by oriented attachment during the one-step hydrothermal process. Under visible-light irradiation, obtained CdS/ZnO exhibited enhanced photocatalytic hydrogen generation owing to improved charge separation from the two-phase intergrowth effect. This work provides a facile hydrothermal route to construct intergrown heterostructures with desired spatial arrangements for improved photocatalytic properties.

Keyword :

nanostructures ZnO facet selective CdS photocatalysis heterostructures

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GB/T 7714 Guo, Xu , Chen, Yubin , Qin, Zhixiao et al. Facet-Selective Growth of Cadmium Sulfide Nanorods on Zinc Oxide Microrods: Intergrowth Effect for Improved Photocatalytic Performance [J]. | CHEMCATCHEM , 2018 , 10 (1) : 153-158 .
MLA Guo, Xu et al. "Facet-Selective Growth of Cadmium Sulfide Nanorods on Zinc Oxide Microrods: Intergrowth Effect for Improved Photocatalytic Performance" . | CHEMCATCHEM 10 . 1 (2018) : 153-158 .
APA Guo, Xu , Chen, Yubin , Qin, Zhixiao , Su, Jinzhan , Guo, Liejin . Facet-Selective Growth of Cadmium Sulfide Nanorods on Zinc Oxide Microrods: Intergrowth Effect for Improved Photocatalytic Performance . | CHEMCATCHEM , 2018 , 10 (1) , 153-158 .
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