|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Microstructural evolution of fine-grained ZA27 alloy during partial remelting显示文摘The microstructural evolution process of fined-grained ZA27 alloy during partial remelting has been investigated. The relationship between the as-cast and semi-solid microstructures has been discussed in particular. The results indicate that a semi-solid microstructure with small and spheroidal primary particles can be obtained when the ZA27 alloy is partially remelted. The microstructural evolution can be divided into four stages, the initial coarsening of the dendrites due to coalescence of dendrite arms, structural separation resulted from the melting of residual interdendritic eutectic, spheroidization due to the partial melting of solid particles and final coarsening attributed to the coalescence and Ostwald ripening. An equiaxed dendrite in the as-cast microstructure may evolve into one spheroidal particle in the semi-solid microsturucture after being partially remelted. The more equiaxed the dendrites in an as-cast microstructure are, the more spheroidal the solid particles in the semi-solid microstructure will be. Finer primary particles could be obtained if the alloy with finer as-cast microstructure was partially remelted. However, due to the coalescence effect, their sizes cannot be reduced further if the refined as-cast microstructure reached a certain extent. | Chen Tijun Fu Mingfeng Hao Yuan | 2010 | China Foundry2010，7，4： | 2 |
| 2 | Experimental study of melt electrospinning in parallel electrical field显示文摘 | HAO Mingfeng LIU Yong HE Xuetao | 2011 | Advanced Materials Research2011，，211： | 1 |
| 3 | Experimental studyof melt electrospinning in parallel electrical field显示文摘 | Hao Mingfeng Liu Yong He Xuetao | 2011 | AdvancedMaterials Research2011，221，： | 1 |
| 4 | Orthogonal design study on factors effecting on fibers diameter of melt electrospinning 显示文摘 | LIU Yong DENG Rongjian HAO Mingfeng | 2010 | Polymer Engineering & Science2010，50，10： | 1 |
| 5 | Factors influencing diameter of polypropylene fiber in melt electrospinning显示文摘 | HAO Mingfeng LIU Yong HE Xuetao | 2011 | Advanced Polymer Science and Engineering2011，，221： | 1 |
| 6 | Orthogonal design study on factors effecting on fibers diameter of melt electrospinning显示文摘 | LIU Yong DENG Rongjian HAO Mingfeng | 2010 | Polymer Engineering & Science2010，50，10： | 1 |
| 7 | Friction and wear properties of casting in-situ silicon particle reinforced ZA27 composites显示文摘The effects of silicon particle content and testing temperature on friction and wear properties of casting in-situ silicon particle reinforced ZA27 composites were investigated.The wear mechanisms were mainly discussed by observations of both worn surfaces and their side views.The results indicated that the variations of wear resistance with increasing of silicon particle content,at all of the testing temperatures applied,showed a similar tendency with a manner of non-monotonous change.It was surprised that the wear resistance decreased with the increase of silicon particle content from 2 vol.%to 5 vol.%,while it increased when the content was less than 2 vol.%or more than 5 vol.%.Similarly,the friction coefficient also did not change monotonously.The dominative wear mechanism changed from a relatively severe regime of plastic deformation accompanied by adhesion wear to a mild regime of smear,then to a very severe regime of severe plastic deformation induced wear,and finally again to a relatively mild regime of smear accompanied by abrasive wear as the silicon content increased.The wear resistance always decreased with elevating testing temperature,but the decrease ranges were different for the composites with different silicon contents.The friction coefficients changed irregularly for the different composites with the increase of testing temperature.Correspondingly,the wear mechanism alternated from a mild regime of smear accompanied by abrasive wear to a severe regime of plastic deformation accompanied by adhesion wear. | Chen Tijun Yuan Chengren Fu Mingfeng Ma Ying LiYuandong Hao Yuan | 2009 | China Foundry2009，6，1： | 1 |
| 8 | Abnormal brain activity in nonsuicidal self-injury:a coordinate-based activation likelihood meta-analysis of functional neuroimaging studies显示文摘Background:The high prevalence of nonsuicidal self-injury(NSSI)in youths demonstrates a substantial population-level burden on society.NSSI is often associated with emotional and social skill deficits.To date,several studies have aimed to identify the underlying neural mechanism of those deficits in NSSI by using functional magnetic resonance imaging(fMRI).However,their conclusions display poor consistency.Objective:We aimed to conduct ameta-analysis using activation likelihood estimation(ALE)for fMRI data based on emotional and cognitive tasks to clarify the underlying neural processing deficits of NSSI.Methods:We searched for MRI studies of NSSI in the PubMed,Cochrane,and Embase databases.We identified significant foci for the included studies and conducted two ALE meta-analyses as follows:(i)activation for the NSSI contrast healthy control group and(ii)deactivation for the NSSI contrast healthy controls.Considering the diverse sex composition of study participants and possible bias from one large sample study,we conducted sensitivity analyses for the meta-analysis.Results:Nine studies comprising 359 participants were included,and the results demonstrated substantial activation in NSSI patients compared with healthy controls in two clusters located in the right medial frontal gyrus extending to the rostral anterior cingulate and the left inferior frontal gyrus extending to the insula.Conclusions:The results suggest that individuals with NSSI show brain activity alterations that underpin their core symptoms,including poor emotional regulation and reward processing deficits.Our findings provide new insights into the neuralmechanism of NSSI,whichmay serve as functional biomarkers for developing effective diagnosis and therapeutic interventions for these patients. | Mingfeng Lai Ping Jiang Jiajun Xu Dan Luo Xiaoting Hao Jing Li | 2021 | Psychoradiology2021，1，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员