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| 1 | High-resolution 3D crustal S-wave velocity structure of the MiddleLower Yangtze River Metallogenic Belt and implications for its deep geodynamic setting显示文摘The Middle-Lower Yangtze River Metallogenic Belt(MLYMB) is an important mineral resource region in China.High-resolution crustal models can provide crucial constraints to understand the ore-forming processes and geodynamic setting in this region. Using ambient seismic noise from 107 permanent and 82 portable stations in the MLYMB and the adjacent area,we present a new high-resolution 3D S-wave velocity model of this region. We first extract 5–50 s Rayleigh wave phase velocity dispersion data by calculating ambient noise cross-correlation functions(CFs) and then use the surface wave direct inversion method to invert the mixed path travel times for the 3D S-wave velocity structure. Checkerboard tests show that the horizontal resolution of the 3D S-wave velocity model is approximately 0.5°–1.0° and that the vertical resolution decreases with increasing noise and depth. Our high-resolution 3D S-wave velocity model reveals:(1) AV-shaped high-velocity zone(HVZ) is located in the lower crust and the uppermost mantle in the study region. The western branch of the HVZ passes through the Jianghan Basin,the Qinling-Dabie orogenic belt and the Nanxiang Basin. The eastern branch, which almost completely covers the main body of the MLYMB, is located near the Tanlu Fault. The low-velocity anomalies between the western and eastern branches are located in the area of the Qinling-Dabie orogenic belt.(2) High-velocity uplifts(HVUs) are common in the crust of the MLYMB,especially in the areas near the Tanlu Fault, the Changjiang Fault and the Yangxin-Changzhou Fault. The intensities of the HVUs gradually weaken from west to east. The V-shaped HVZ in the lower crust and uppermost mantle and the HVUs in the middle and lower crust likely represent cooled mantle intrusive rocks. During the Yanshanian period, fault systems formed in the MLYMB due to the convergence between the South China Plate and the North China Plate, the multiple-direction drifting of the PaleoPacific Plate and its subduction beneath the Eurasian Plate. The dehydration of the cold oceanic crust led to partial melting in the upper mantle. Temperature differences caused strong convection of the upper mantle material that underplated the lower crust and rose to near the surface along the deep fault systems. After mixing with the crustal materials, mineralization processes, such as assimilation and fractional crystallization, occurred in the MLYMB. | Song LUO Huajian YAO Qiusheng LI Weitao WANG Kesong WAN Yafeng MENG Bin LIU | 2019 | Science China Earth Sciences2019，62，9： | 13 |
| 2 | Spatio-Temporal Impact of Rural Livelihood Capital on Labor Migra- tion in Panxi, Southwestern Mountainous Region of China显示文摘Labor migration to urban centers is a common phenomenon in the Panxi region of the southwestern mountainous region of China, mainly owing to inadequate livelihood capital in rural areas. Numerous studies have been conducted to explore the relationship between labor migration and its causes, such as individual and family characteristics, but few studies have focused on livelihood capital. This paper examines the impact factors on labor migration employment location selection and duration from a household livelihood capital perspective. A case study of 279 households from 10 villages in the area was carried out in February 2016. We used both qualitative and quantitative methods to analyze the data. On the basis of the 279 questionnaires, the proportion of households with non-labor migration is 48.4%, whereas households with labor migration within a local city and migration across regions account for 28.7% and 22.9%, respectively. Social, financial, and human capitals are the primary factors that influence migrants' employment location choice positively. Among them, social capital has a significant impact on both migration within a local city and across regions; each of the regression coefficients is 1.111 and 1.183. Social, human, and financial capitals also have a positive impact on the duration of labor migration, and similarly, social capital is the highest coefficient with 2.489. However, physical capital only partly impacts labor migration across regions, whereas the impact of labor migration within a local city, and the duration, are not significant. Furthermore, the impact of household natural capital on migration space and time are all negative relationships, especially for labor migration across the regions and duration, with coefficient scores of 4.836 and 3.450, respectively. That is to say, a laborer is inclined to migrate within a local city for a short term, or not migrate at all, if natural capital is abundant. Our analysis results show that household livelihood capital has a strong spatio-temporal impact on labor migration. | WAN Jiangjun DENG Wei SONG Xueqian LIU Ying ZHANG Shaoyao SU Yi LU Yafeng | 2018 | Chinese Geographical Science2018，28，1： | 5 |
| 3 | Quantitative analysis of the tribological properties of phosphate glass at the nano- and macro-scales显示文摘Processing(grinding,polishing)of phosphate laser(PL)glass involves material removal at two vastly different(spatial)scales.In this study,the nano‐and macro‐tribological properties of PL glass are investigated by rubbing the glass against a SiO_(2) counter‐surface in both dry and humid conditions.The results indicate that the friction of the PL glass/SiO_(2) pair has opposing trends at the nano‐and macroscales.At the nanoscale,the friction coefficient(COF)in humid air is much higher than in dry air,which is attributed to the capillary effect of the absorbed water‐film at the interface.At the macroscale,on the other hand,the COF in humid air is lower than in dry air,because the water‐related mechanochemical wear makes the worn surface less susceptible to cracking.Material removal for PL glass is better facilitated by humid air than by dry air at both scales,because the stress‐enhanced hydrolysis accelerates the material‐removal process in glass.Moreover,the material‐removal is more sensitive to contact pressure at the macroscale,because stronger mechanical‐interaction occurs during material removal at the macroscale with the multi asperity contact mode.At the macroscale,the material removal is more sensitive to contact pressure in humid air compared to dry air.Because almost all mechanical energy is used to remove material in humid air,and most of the mechanical energy is used to produce cracks in PL glass in dry air.The results of this study can help optimize the multi‐scale surface processing of optical glasses. | Huimin QI Wen HU Hongtu HE Yafeng ZHANG Chenfei SONG Jiaxin YU | 2021 | Friction2021，9，5： | 1 |
| 4 | Regeneration and utilization of nutrients during collapse of a Mesodinium rubrum red tide and its influence on phytoplankton species composition显示文摘High-biomass red tides occur frequently in some semi-enclosed bays of Hong Kong where ambient nutrients are not high enough to support such a high phytoplankton biomass. These high-biomass red tides release massive inorganic nutrients into local waters during their collapse. We hypothesized that the massive inorganic nutrients released from the collapse of red tides would fuel growth of other phytoplankton species. This could influence phytoplankton species composition. We tested the hypothesis using a red tide event caused by Mesodinium rubrum(M. rubrum) in a semi-enclosed bay, Port Shelter. The red tide patch had a cell density as high as 5.0×10~5 cells L^(-1), and high chlorophyll a(63.71 μg L^(-1)). Ambient inorganic nutrients(nitrate:NO_3^-, ammonium: NH_4^+, phosphate: PO_4^(3-), silicate: SiO_4^(3-)) were low both in the red tide patch and the non-red-tide patch(clear waters outside the red tide patch). Nutrient addition experiments were conducted by adding all the inorganic nutrients to water samples from the two patches followed by incubation for 9 days. The results showed that the addition of inorganic nutrients did not sustain high M. rubrum cell density, which collapsed after day 1, and did not drive M. rubrum in the non-red-tide patch sample to the same high-cell density in the red tide patch sample. This confirmed that nutrients were not the driving factor for the formation of this red tide event, or for its collapse. The death of M. rubrum after day 1 released high concentrations of NO_3^-,PO_4^(3-), SiO_4^(3-), NH_4^+, and urea. Bacterial abundance and heterotrophic activity increased, reaching the highest on day 3 or 4, and decreased as cell density of M. rubrum declined. The released nutrients stimulated growth of diatoms, such as Chaetoceros affinis var. circinalis, Thalassiothrix frauenfeldii, and Nitzschia sp., particularly with additions of SiO_4^(3-) treatments, and other species. These results demonstrated that initiation of M. rubrum red tides in the bay was not directly driven by nutrients.However, the massive inorganic nutrients released from the collapse of the red tide could induce a second bloom in low-ambient nutrient water, influencing phytoplankton species composition. | Yafeng ZHANG Xiuxian SONG Paul J.HARRISON Sheng LIU Zhiming YU Jinjun KAN Peiyuan QIAN Hao LIU Kedong YIN | 2018 | Science China Earth Sciences2018，61，10： | 1 |
| 5 | Preparation and characterization of hydrophobically modified polyacrylamide hydrogels by grafting glycidyl methaerylate 显示文摘 | Song Pingan Zhang Yafeng Kuang Jianzheng | 2007 | J Mater Sci2007，42，： | 1 |
| 6 | Modulating the C-terminus of DEP1 synergistically enhances grain quality and yield in rice显示文摘Grain shape is a key breeding target that influences both grain yield and appearance quality in rice. Breeding for long-slender grains is an effective strategy to improve grain quality (Jain et al., 2004;Wang et al., 2012, 2015a). In the past two decades, several quantitative trait loci (QTLs) responsible for grain size and shape have been identified, including GS3 (Fan et al., 2006), GS5 (Li et al., 2011). | Haixiang Huang Yafeng Ye Wenzhen Song Qi Li Ruixi Han Chenchen Wu Shuoxun Wang Jianping Yu Xueying Liu Xiangdong Fu Qian Liu Kun Wu | 2022 | Journal of Genetics and Genomics2022，49，5： | 1 |
| 7 | Development of the NWPU20 Micro Air Vehicle显示文摘This paper reports the design, construction, and operation of NWPU20 Micro Air Vehicle (MAV), which is the smallest that has, up to now, been developed in PR China. The miniaturization level in PR China makes smaller MAV, in our opinion, not possible to implement. The NWPU20 is a 20-centimeter span, battery powered, fixed-wing aircraft with an off-the-shelf color video camera that can transmit live video back to the ground station. The on-board electronic subsystems are smallest and lightest among the commercial products, including an 8-gram wireless video camera, an 8-gram receiver, a 5-gram electronic speed controller (ESC), two 4.5-gram fully proportional radio frequency control servos, and the total mass of NWPU20 is less than 80 grams. An experimental model was fabricated and tested in the Low Turbulent Flow Wind Tunnel (LTFWT) at Northwestern Polytechnical University (NWPU) to research low Reynolds number flow characteristics of the NWPU20. The result of the wind tunnel test shows that stall angle of attack of NWPU20 can reach 30°, which is higher than that of the general aircrafts, and the maximum lift-to-drag ratio of NWPU20 can nearly reach 6 at the angle of attack of 10°, which can satisfy design requirements of the NWPU20. A small-sized propulsion/torque testing system was developed to measure and analyze the propulsion and torque performances of the motor-propeller combination used in the NWPU20. A center of gravity (c.g.) testing apparatus was developed and used to adjust the c.g. of the NWPU20 so that it has good longitudinal static stability and control. The NWPU20 prototype has undergone successfully flight tests many times; it flies at 32 kilometers per hour, with an endurance of 15 minutes, and a maximum communications range of 300 meters. With the color video camera, NWPU20 successfully transmits real-time video back to the ground station. The success of NWPU20 proves preliminarily that 20-centimeter span micro air vehicle is feasible and usable. | Li Zhanke Song Bifeng Zhang Yafeng Zhang Wei Zhang Yizhe | 2005 | 西北工业大学学报2005，23，4： | 1 |
| 8 | Angiograms of the Abdominal Aorta in a Patient of Middle Aortic Syndrome显示文摘A 42-year old woman of middle aortic syndrome presented with severe hypertension for 20 years, whose abdominal aorta angiography revealed long segment and nearly complete occlusion in the mid portion of abdominal aorta, and extensively enlarged collateral vascular supply to the lower portion of abdominal aorta. The pressures proximal and distal to stenosis were 185/110 and 95/70 mmHg, and the pressure gradient across the stenosis was 90/40 mmHg. After the operation of thoraco-abdominal bypass graft, the pressure difference between the upper and lower extremities eventually disappeared. | Zhou Yafeng Yang Xiangjun Song Jianping Jiang Tingbo Li Xun Hui Jie Liu Zhihua Jiang Wenping | 2007 | South China Journal of Cardiology2007，8，2： | 0 |
| 9 | Arachis species:High-quality forage crops—nutritional properties and breeding strategies to expand their utilization and feeding value显示文摘Plants of the genus Arachis originated from South America and are cultivated worldwide.The genus Arachis contains 83 species and nine intrageneric taxonomic sections.The cultivated peanut(Arachis hypogaea L.)belongs to the Arachis section,the forage peanut(Arachis pintoi Krapov.&W.C.Greg.)belongs to the Caulorrhizae section,and the perennial peanut(Arachis glabrata Benth.)belongs to the Rhizomatosae section.These three peanut species have been developed for use as fodder crops.This review summarizes the forage value of Arachis species.Forage and perennial peanuts can be intercropped with forage species to feed livestock.The cultivated peanut vines and peanut by-products,such as peanut skins and peanut meal,are also high-quality fodder used to feed sheep,cattle,and poultry.A major limiting factor in terms of adopting forage and perennial peanuts as forage crops is their limited resistance to frosts,resulting from their low winter hardiness.Therefore,the feeding value of cultivated peanuts is higher compared to forage and perennial peanuts.This review suggests that Arachis is a suitable forage crop,focusing on their nutritional properties and breeding to increase their performance under cultivation and feeding value. | Hui Song Yafeng Huang Lanlan Ding Zhenquan Duan Jiancheng Zhang | 2023 | Grassland Research2023，2，3： | 0 |
| 10 | Urbanization and Its Impact on Rural Livelihoods:A Study of Xichang City Administration,Sichuan Province,China显示文摘This study examines urbanization in Xichang city administration(XCA)and its implications on rural livelihoods.Time series data on population size and land use(1990-2010)of Xichang city administration were gathered from population censuses and revenue records.The data were analyzed to observe changes in population size and land use/cover during the recorded period.Along with this,a case study of seven villages that are highly influenced by urban expansion in close proximity to Xichang city was carried out.We surveyed 110 households of selected villages using purposive-random sampling method and framed a structured questionnaire on urbanization implications for them.Descriptive statistics,correlation and regression model was employed to analyze the data.From 1990 to 2010,the authors observed an enormous transformation in urban landscapes as the urban area has increased by 14.02 km^(2)(111%)and about 20.65 km^(2)(16 times)increase in public transit construction land.On the other hand,paddy fields and grasslands of the selected villages have decreased by 16.6 km^(2)(4.9%)and 35.43 km^(2)(8.4%),respectively.Along with urbanization,out-migration as well as medical and educational facilities has increased while agriculture and livestock activities have decreased.The study suggested that to lessen the impact of urbanization in rural areas,agricultural and its allied practices should be intensified so as to augment employment and reduce out-migration from the rural areas. | Vishwambhar Prasad SATI DENG Wei LU Yafeng ZHANG Shaoyao WAN Jiangjun SONG Xueqian | 2017 | Chinese Journal of Urban and Environmental Studies2017，5，4： | 0 |
| 11 | Synthesis of TiCl_(2) powders through reactive gas phase infiltration in a fluidized bed reactor显示文摘TiCl_(2) is a promising precursor for producing metallic titanium alloys and titanium-based ceramics.However,the effective synthesis of high-quality TiCl_(2) powder remains challenging.Herein,a fluidized bed reactor(FBR)providing a high gas-solid contact area was employed to synthesize TiCl_(2) powder using a reliable TiCl_(4)-Ti reaction system.Optimal reaction conditions(600℃and 120 min)were determined for the proposed Ti-TiCl_(4) system by kinetic investigation.A dense Ti layer was regenerated upon the original surface of the Ti powder as a result of TiCl_(2) disproportionation at high temperature(above 700℃),which impeded infiltration by gaseous TiCl_(4).The particle size of the Ti reducing agent played a vital role in the production of TiCl_(2) powder.A mean particle size of 24.5μm was confirmed to be the most feasible option based on the optimal chlorinated depth(17μm). | Miao Song Yafeng Yang Hongdan Zhao Maoqiao Xiang Qingshan Zhu Jibin Jia Chaoquan Hu Fen Yue | 2021 | Particuology2021，19，4： | 0 |
| 12 | Mechanically induced Cu active sites for selective C–C coupling in CO_(2)electroreduction显示文摘Developing a convenient method to endow bulk Cu-based electrode with high activity of electrocatalytic CO_(2)reduction reaction(CO_(2)RR)to multicarbon(C_(2+))products is desirable but challenging.Herein,for the first time,we report that mechanical polishing induces highly reactive Cu sites for selective C-C coupling in CO_(2)RR.We find that mechanical polishing could endow Cu foil with abundant nanocavity surface structure,which efficiently confines the carbonaceous intermediates to enhance the probability of C-C coupling reaction.By confining the carbonaceous intermediates with Cu nanocavity,the as-prepared electrode delivers a Faradaic efficiency toward C_(2+)products of 65.7%at-1.3 V vs.RHE,which is enhanced up to 1.7 folds compared with that of commercial Cu foil.This work provides a new method to enable Cu foil with high activity of CO_(2)RR to C_(2+)products. | Zhao Chen Yao Song Zhenyu Zhang Yafeng Cai Huan Liu Wenxiang Xie Dehui Deng | 2022 | Journal of Energy Chemistry2022，31，11： | 0 |
| 13 | Exosomes derived from circBCRC-3-knockdown mesenchymal stemcells promoted macrophage polarization显示文摘Macrophages play an essential role in the myocardial ischemia-reperfusion injury(MIRI),and the macrophage shifting from M1 to M2 phenotypes might be a potential strategy for the treatment of MIRI.It has been reported that miR-182 plays an important role in MSC-Exo-associated macrophage polarization.As circBCRC-3 is a newly discovered circle RNA that worked as a sponge of miR-182,this research aimed to find if circBCRC-3 plays a role in MSC-Exo-associated macrophage polarization.Firstly,circBCRC-3 was identified by divergent primers in mesenchymal stem cells(MSCs).Secondly,the exosome of MSCs was isolated and identified by transmission electron microscopy(TEM),nanoparticle-tracking analysis,and western blotting analysis.The expression level of circBCRC-3 in MSCexos was detected by RT-PCR.Finally,the polarization of the RAW264.7 cell phenotype was analyzed by flow cytometry.Moreover,we first identified circBCRC-3 in MSCs.The results further confirmed that MSCexo could effectively shift the macrophage polarization state from M1 towards the M2 phenotype,which indicated its role in MIRI cure. | QI SONG JUN ZHANG QIANG ZHANG JING LIU KE LV JIALU YAO YAFENG ZHOU | 2020 | BIOCELL2020，44，4： | 0 |
| 14 | Utilizing the capacity below 0 V to maximize lithium storage of hard carbon anodes显示文摘Compared with conventional graphite anode,hard carbons have the potential to make reversible lithium storage below 0 V accessible due to the formation of dendrites is slow.However,under certain conditions of high currents and lithiation depths,the irreversible plated lithium occurs and then results in the capacity losses.Herein,we systematically explore the true reversibility of hard carbon anodes below 0 V.We identify the lithiation boundary parameters that control the reversible capacity of hard carbon anodes.When the boundary capacity is controlled below 400 mAh g−1 with current density below 50 mA g−1,no lithium dendrites are observed during the lithiation process.Compared with the discharge cut-off voltage to 0 V,this boundary provides a nearly twice reversible capacity with the capacity retention of 80%after 172 cycles.The results of characterization and finite element model reveal that the large reversible capacity below 0 V of hard carbon anodes is mainly benefited from the dual effect of lithium intercalation and reversible lithium film.After the lithium intercalation,the over-lithiation induces the quick growth of lithium dendrites,worsening the electrochemical irreversibility.This work enables insights of the potentially low-voltage performance of hard carbons in lithium-ion batteries. | Qianlei Liu Liqin Dai Lijing Xie Zonglin Yi Mingxin Song Yafeng Fan Guohua Sun Fangyuan Su Cheng-Meng Chen | 2023 | Particuology2023，，12： | 0 |
| 15 | Promising therapeutic approaches of utrophin replacing dystrophin in the treatment of Duchenne muscular dystrophy显示文摘Duchenne muscular dystrophy(DMD)is a serious genetic neuromuscular rare disease that is prevalent and caused by the mutation/deletion of the X-linked DMD gene that encodes dystrophin.Utrophin is a dystrophin homologous protein on human chromosome 6.Dystrophin and utrophin are highly homologous.They can recruit many dystrophin-glycoprotein complex(DGC)-related proteins and co-localize at the sarcolemma in the early stage of human embryonic development.Moreover,utrophin is overexpressed naturally at the mature myofiber sarcolemma in DMD patients.Therefore,utrophin is considered the most promising homologous protein to replace dystrophin.This review summarizes various modulating drugs and gene therapy approaches for utrophin replacement.As a universal method to treat DMD disease,utrophin has a promising therapeutic prospect and deserves further investigation. | Ruo Wu Yafeng Song Shiwen Wu Yongchang Chen | 2022 | Fundamental Research2022，2，6： | 0 |
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