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| 1 | Numerical simulation of the pulsing air separation field based on CFD显示文摘The flow field of pulsing air separation is normally in an unsteady turbulence state.With the application of the basic principles of multiphase turbulent flows,we established the dynamical computational model,which shows a remarkable variation of the unstable pulsing air flow field.CFD(computational fluid dynamics) was used to conduct the numerical simulation of the actual geometric model of the classifier.The inside velocity of the flowing fields was analyzed later.The simulation results indicate that the designed structure of the active pulsing air classifier provided a favorable environment for the separation of the particles with different physical characters by density.We shot the movement behaviors of the typical tracer grains in the active pulsing flow field using a high speed dynamic camera.The displacement and velocity curves of the particles in the continuous impulse periods were then analyzed.The experimental results indicate that the effective separation by density of the particles with the same settling velocity and different ranges of the density and particle size can be achieved in the active pulsing airflow field.The experimental results provide an agreement with the simulation results. | He Jingfeng He Yaqun Zhao Yuemin Duan Chenlong Ye Cuiling | 2012 | International Journal of Mining Science and Technology2012，22，2： | 12 |
| 2 | Numerical simulation and experimental verification of bubble size distribution in an air dense medium fluidized bed显示文摘Bubble size distribution is the basic apparent performance and obvious characteristics in the air dense medium fluidized bed (ADMFB). The approaches of numerical simulation and experimental verification were combined to conduct the further research on the bubble generation and movement behavior. The results show that ADMFB could display favorable expanded characteristics after steady fluidization. With different particle size distributions of magnetite powder as medium solids, we selected an appropriate prediction model for the mean bubble diameter in ADMFB. The comparison results indicate that the mean bubble diameters along the bed heights are 35 mm < D b < 66 mm and 40 mm < D b < 69 mm with the magnetite powder of 0.3 mm+0.15mm and 0.15mm+0.074mm, respectively. The prediction model provides good agreements with the experimental and simulation data. Based on the optimal operating gas velocity distribution, the mixture of magnetite powder and <1mm fine coal as medium solids were utilized to carry out the separation experiment on 6-50mm raw coal. The results show that an optimal separation density d P of 1.73g/cm 3 with a probable error E of 0.07g/cm 3 and a recovery efficiency of 99.97% is achieved, which indicates good separation performance by applying ADMFB. | He Jingfeng Zhao Yuemin Luo Zhenfu He Yaqun Duan Chenlong | 2013 | International Journal of Mining Science and Technology2013，23，3： | 11 |
| 3 | Separation performance of fine low-rank coal by vibrated gas-solid fluidized bed for dry coal beneficiation显示文摘 | Jingfeng He Yuemin Zhao Jie Zhao Zhenfu Luo Chenlong Duan Yaqun He | 2015 | Particuology2015，13，6： | 4 |
| 4 | Breeding of a New Clubroot-resistant Chinese Cabbage Variety, CCR11242显示文摘In this study,using Japanese radish cytoplasmic sterile line ' Half Green Cabbage'( HGC) and clubroot-resistant South Korean cabbage variety ' CR Cabbage King'( CCK) as experimental materials,self-incompatible DH lines were obtained by microspore culture.Through five generations of backcross,CCR11239,a clubroot-resistant radish cytoplasmic sterile line,was obtained.Through six generations of self-crossing,CCR11240,the maintainer line of CCR11239,was bred.After the cross of CCK and Luchunbai 1( 83- 1) and five generations of self-crossing,self-compatible line CCR11241 was obtained.Through crossing CCR11240 with CCR11241,the new cabbage variety CCR11242 was obtained.After variety comparison test,provincial regional test and production demonstration test,the new variety was registered in 2012.The average yield of CCR11242 reached 60 975 kg / hm2,which was improved by 142% compared with Luchunbai 1( 83- 1).The disease index of CCR11242 was 5.63,which was 88.13 lower than the control,indicating high resistance( HR) to clubroot. | Xuezhong XU Zhimei TIAN Hongli YANG Jingfeng HU Liqin ZHANG Mei LAN Hongju DUAN Jiangming HE | 2016 | Agricultural Biotechnology2016，5，5： | 1 |
| 5 | Clinical characteristics of brain tumorrelated epilepsy and factors influencing the identification of epilepsy-associated tumors显示文摘Background:To analyze the clinical features of brain tumor-related epilepsy(BTRE)and explore the factors influencing the identification of epilepsy-associated tumor(EAT),in order to advance the clinical understanding of BTRE and EAT.Methods:Intracranial tumor origin and location as well as the type of epilepsy were retrospectively reviewed in 153 BTRE patients.The patients were further divided into the EAT and non-EAT groups,and comparisons were made for age,sex,tumor origin and location,and epilepsy type between the two groups.Results:The 153 BTRE patients were divided into 78 cases with primary intracranial tumor and 75 cases with tumor originating from extracranial metastasis,according to the origin of tumor.According to the location of tumor,116 cases had tumor lesions located in the brain parenchyma,and 37 cases had tumor lesions located in the meninges.Further,in the group with a brain parenchyma location,77 cases had single lobular involvement,and 39 cases had multiple-lobular involvement;84 cases had tumor lesions located in one hemisphere and 32 cases in both hemispheres.According to the type of epilepsy,92 cases had generalized seizures,and 61 cases had focal seizures.The type of epilepsy did not significantly correlate with the origin of intracranial tumor,the location of tumor lesions(in brain parenchyma or meninges)(P>0.05),or the hemispherical location(in one or two hemispheres)of lesions(P>0.05),but was significantly related with the lobular localization of lesions(P<0.05).The 153 cases of BTRE consisted of 87 EAT and 66 non-EAT,with significant differences in the origin,location and type(being glioma/non-glioma)of tumor.Logistic regression analysis showed that the type of tumor(i.e.whether being glioma)served as an independent factor for EAT identification;the lower the World Health Organization grade of glioma,the more likely the EAT is to be diagnosed(P<0.05).Conclusion:The majority of BTRE patients in this study had tumors located in the brain parenchyma.In addition,the patients with generalized seizures outnumbered those with focal seizures,and the type of epilepsy was correlated with the lobular location of tumor lesions.The EATs are mostly low-grade gliomas. | Xianwen Zhang Liaoyuan Zheng Jingfeng Duan Zongping Li Yufeng Tang | 2020 | Acta Epileptologica2020，2，1： | 0 |
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