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| 1 | Precipitate coarsening and its effects on the hot deformation behavior of the recently developedγ’-strengthened superalloys显示文摘Recently,theγ’-strengthened superalloys are of great interests in high temperature applications due to their excellent high temperature strength which is derived from theγ’strengthening phase.For theseγ’-strengthened superalloys,the changes in morphology,size and distribution ofγ’precipitates due to coarsening during thermal exposure have a significant impact on the properties of alloys.This article briefly summarizes the recent advances on the coarsening behavior of gamma prime precipitates in the recently-developedγ’-strengthened superalloys and its effects on the hot deformation behavior of superalloys,drawing specific examples on Allvac^(■)718 Plus TM and Ni3 Al-based intermetallic superalloys.It is found that the particle size plays an important role in morphological evolution ofγ’precipitates.For instance,the morphology ofγ’precipitates evolves from cuboidal to strip-like or other complex structures in Ni3 Al-based intermetallic alloys,while theγ’precipitates in Allvac^(■)718 Plus alloy always present nearspherical morphology due to the relatively small initial particle size.The Lifshitz-Slyozof-Wagner(LSW)theory and its modifications,as well as Trans-Interface Diffusion Controlled(TIDC)theory have been applied to describing the coarsening kinetics ofγ’precipitates.Additionally,the hot deformation behavior ofγ’-strengthened superalloy is found to be greatly influenced by the coarsening ofγ’precipitates. | Yuting Wu Chong Li Xingchuan Xia Hongyan Liang Qiqi Qi Yongchang Liu | 2021 | Journal of Materials Science & Technology2021，，8： | 7 |
| 2 | Redundant CAMTA Transcription Factors Negatively Regulate the Biosynthesis of Salicylic Acid and N-Hydroxypipecolic Acid by Modulating the Expression of SARD1 and CBP60g显示文摘Two signal molecules, salicylic acid (SA) and N-hydroxypipecolic acid (NHP), play critical roles in plant immunity. The biosynthetic genes of both compounds are positively regulated by master immune-regulating transcription factors SARD1 and CBP60g. However, the relationship between the SA and NHP pathways is unclear. CALMODULIN-BINDING TRANSCRIPTION FACTOR 1 (CAMTA1), CAMTA2, and CAMTA3 are known redundant negative regulators of plant immunity, but the underlying mechanism also remains largely unknown. In this study, through chromatin immunoprecipitation and electrophoretic mobility shift assays, we uncovered that CBP60g is a direct target of CAMTA3, which also negatively regulates the expression of SARD1, presumably via an indirect effect. The autoimmunity of camta3-1 is suppressed by sard1 cbp60g double mutant as well as ald1 and fmo1, two single mutants defective in NHP biosynthesis. Interestingly, a suppressor screen conducted in the camta1/ 2/ 3 triple mutant background yielded various mutants blocking biosynthesis or signaling of either SA or NHP, leading to nearly complete suppression of the extreme autoimmunity of camta1/ 2/ 3, suggesting that the SA and NHP pathways can mutually amplify each other. Together, these results reveal that CAMTAs repress the biosynthesis of SA and NHP by modulating the expression of SARD1 and CBP60g, and that the SA and NHP pathways are coordinated to optimize plant immune response. | Tongjun Sun Jianhua Huang Yan Xu Vani Verma Beibei Jing Yulin Sun Alberto Ruiz Orduna Hainan Tian Xingchuan Huang Shitou Xia Laurel Schafer Reinhard Jetter Yuelin Zhang Xin Li | 2020 | Molecular Plant2020，13，1： | 5 |
| 3 | Accessibility Comparison and Spatial Differentiation of Xi’an Scenic Spots with Different Modes Based on Baidu Real-time Travel显示文摘A study of the accessibility of a city’s scenic spots via different travel modes can contribute to optimization of tourism-related transportation while improving tourists’ travel-related satisfaction levels and advancing tourism. We systematically analyzed the accessibility of 56 scenic spots in Xi’an City, China, via car and public transport travel modes using the real-time travel function of the Baidu Maps API(Application Programming Interface) along with spatial analysis methods and the modal accessibility gap index of scenic spots. We obtained the following results. First, maximum and minimum travel times using public transport exceeded those using cars. Moreover, the accessibility of scenic spots via cars and public transport presented a circular spatial pattern of increasing travel time from the center to the periphery. Contrasting with travel by public transport, car travel showed a clear time-space compression effect. Second, accessibility of the scenic spots via cars and public transport showed some spatial heterogeneity, with no clear advantages of car accessibility in the central urban area. However, advantages of car accessibility were increasingly evident moving from the center to the periphery. Third, whereas the correlation of the modal accessibility gap index of scenic spots in Xi’an with global space was significantly positive, local spatial interdependence was only evident in some inner city areas and in marginal areas. Moreover, spatial heterogeneity was evident in two regions but was insignificant in other areas, indicating that the spatial interdependence of the modal accessibility gap index in most scenic spots was not apparent in terms of the overall effect of public transport routes, road networks, and the distribution of scenic spots. The improvement of public transport coverage in marginal areas and the optimization of public transport routes in central urban areas are essential tasks for improving travel using public transport in the future. | WANG Li CAO Xiaoshu LI Tao GAO Xingchuan | 2019 | Chinese Geographical Science2019，29，5： | 5 |
| 4 | Acoustic properties of closed-cell aluminum foams with different macrostructures显示文摘As structural materials, closed-cell aluminum foams possess obvious advantages in product dimension, strength and process economics compared with open cell aluminum foams. However, as a kind of structure-function integration materials, the application of closed-cell aluminum foams has been restricted greatly in acoustic fields due to the difficulty of sound wave penetration. It was reported that closed-cell foams with macrostructures have important effect on the propagation of sound waves. To date, the relationship between macrostructures and acoustic properties of commercially pure closedcell aluminum foams is ambiguous. In this work, different perforation and air gap types were designed for changing the macrostructures of the foam. Meanwhile, the effect of macrostructures on the sound absorption coefficient and sound reduction index were investigated. The results showed that the foams with half-hole exhibited excellent sound absorption and sound insulation behaviors in high frequency range(>2500 Hz). In addition, specimens with air gaps showed good sound absorption properties in low frequency compared with the foams without air gaps. Based on the experiment results, propagation structural models of sound waves in commercially pure closed-cell aluminum foams with different macrostructures were built and the influence of macrostructures on acoustic properties was discussed. | Xingchuan Xia Zan Zhang Weimin Zhao Chong Li Jian Ding Chenxi Liu Yongchang Liu | 2017 | Journal of Materials Science & Technology2017，33，11： | 3 |
| 5 | Seasonal variability in dissolved oxygen in the Bohai Sea,China显示文摘Deoxygenation has frequently appeared in coastal ecosystems over the past century due to the joint infl uence of increasing anthropogenically induced nutrient inputs and global warming.The semi-enclosed Bohai Sea is a typical system that is prone to deoxygenation,with regular hypoxia events consistently recorded in recent decades.Based on in-situ observation data collected in large-scale voyage surveys in the Bohai Sea during 2008-2017,the seasonal variability in dissolved oxygen(DO)and its controlling mechanisms were studied.The results indicated that in spring and autumn,the DO distributions exhibited similar spatial patterns in the surface and bottom layers,while in summer,its spatial distribution was characterized by large-scale oxygen-poor zones distributed off the Qinhuangdao Coast and the central southern Bohai Sea in the bottom layer.The controlling mechanisms of the DO distribution varied from season to season.Spring and autumn DO distributions were dominated by the seawater temperature.Under the combined eff ects of stratifi cation and decomposition,the summer bottom DO exhibited dual-core distribution.On the one hand,stratifi cation could greatly impede vertical mixing,resulting in reduced bottom DO replenishment.On the other hand,the increased bottom organic matter intensifi ed the decomposition processes,inducing massive DO consumption and elevated dissolved inorganic nitrogen concentrations.In addition,the stronger stratifi cation might be the reason for the more severe deoxygenation in the southern oxygen-poor zones in summer.Our study provides guidance for an in-depth understanding of the DO seasonality in the Bohai Sea and the mechanisms that modulate it and for the improvement of hypoxia forecasts in ocean models. | Yaozu CHEN Fangguo ZHAI Yanzhen GU Jing CAO Cong LIU Xingchuan LIU Zizhou LIU Peiliang LI | 2022 | Journal of Oceanology and Limnology2022，40，1： | 2 |
| 6 | Sulfur-deficient Bi_(2)S_(3-x) synergistically coupling Ti_(3)C_(2)T_(x)-MXene for boosting electrocatalytic N_(2) reduction显示文摘Electrocatalytic nitrogen reduction reaction(NRR)is an appealing route for the sustainable NH_(3)synthesis,while developing efficientand durable NRR catalysts remains at the heart of achieving high-efficiency N_(2)-to-NH_(3)electrocatalysis.Herein,we rationally combine vacancy and interface engineering to design sulfur-deficient Bi2S3 nanoparticles decorated Ti_(3)C_(2)T_(x)-MXene as an effective NRR catalyst.The developed Bi2S3 nanoparticles decorated Ti_(3)C_(2)T_(x)-MXene(Bi2S3-xTi_(3)C_(2)T_(x))naturally contained abundant S-vacancies and exhibited a dramatically boosted NRR activity with an NH_(3)yield of 68.3μg·h^(-1)mg^(-1)(-0.6 V)and a Faradaic efficiency of 22.5%(-0.4 V),far superior to pure Bi_(2)S_(3)and Ti_(3)C_(2)T_(x)and surpassing almost all ever reported Bi-and MXene-based NRR catalysts.Theoretical investigations unveiled that the exceptional NRR activity of Bi_(2)S_(3-x)/Ti_(3)C_(2)T_(x)stemmed from its dual-active-center system involving both S-vacancies and interfacial-Bi sites,which could synergistically promote N_(2)adsorption and*N_(2)H formation to result in an energetic-favorable NRR process. | Yaojing Luo Peng Shen Xingchuan Li Yali Guo Ke Chu | 2022 | Nano Research2022，15，5： | 1 |
| 7 | A triple combination of atorvastatin, celecoxib and tipifarnib stronglyinhibits pancreatic cancer cells and xenograft pancreatic tumors显示文摘 | Ning Ding Xiao-Xing Cui Zhi Gao Huarong Huang Xingchuan Wei Zhiyun Du Yong Lin Weichung Shih Arnold Rabson Allan Conney Chunhong Hu Xi Zheng | 2014 | International Journal of Oncology2014，，6： | 1 |
| 8 | Triter- penoid saponins from Xanthoceras sorbifolia Bunge and their inhibitory activity on human cancer cell lines 显示文摘 | YU Lili WANG Xiaobing WEI Xingchuan | 2012 | Bioorg Med Chem Lett2012，22，16： | 1 |
| 9 | Boron Nitride Quantum Dots/Ti_(3)C_(2)T_(x)-MXene Heterostructure For Efficient Electrocatalytic Nitrogen Fixation显示文摘Electrocatalytic N_(2) fixation through N_(2) reduction reaction(NRR)has been regarded as a promising route for sustainable NH_(3) synthesis,while exploring high-performing NRR catalysts is pivotal yet challenging.Herein,BN quantum dots/Ti_(3)C_(2)T_(x)-MXene(BNQDs/Ti_(3)C_(2)T_(x))heterostructure is demonstrated as an efficient and durable NRR catalyst,exhibiting a high NH_(3) yield of 52.8±3.3μg h^(-1) mg^(-1) with an FE of 19.1±1.6%at0.4 V(vs.RHE),which stand at the high level among all reported BN-and MXene-based NRR catalysts.Theoretical computations reveal that the electronic interactions between BNQDs and Ti_(3)C_(2)T_(x) enrich the electron density of B atoms at the heterointerface and endow them with enhanced electron-donating capability for N_(2) activation and protonation.Meanwhile,the decorated BNQDs can block the active sites of Ti_(3)C_(2)T_(x) for hydrogen evolution,rendering a high N_(2)-to-NH_(3) selectivity. | Ke Chu Xingchuan Li Ye Tian Qingqing Li Yali Guo | 2022 | Energy & Environmental Materials2022，5，4： | 1 |
| 10 | 一个性信息素拮抗剂调控棉铃虫最优交配时间显示文摘文章简介昆虫依靠识别特异的性信息素来寻找和识别交配对象。棉铃虫雌虫性腺释放多种性信息素组分,其中性信息素主组分具有吸引雄虫进行交配的功能,但是次要组分的功能及其识别机制仍不清楚。 | Hetan Chang Yang Liu Dong Ai Xingchuan Jiang Shuanglin Dong 王桂荣 | 2018 | 科学新闻2018，0，4： | 0 |
| 11 | Receptor-like kinases MDS1 and MDS2 promote SUMM2-mediated immunity显示文摘Disruption of the MEKK1-MKK1/MKK2-MPK4 kinase cascade leads to activation of immunity mediated by the nucleotide-binding leucine-rich repeat(NLR)immune receptor SUMM2,which monitors the phosphorylation status of CRCK3.Here we report that two receptor-like kinases(RLKs),MDS1,and MDS2,function redundantly to promote SUMM2-mediated immunity.Activation of SUMM2-mediated immunity is dependent on MDS1,and to a less extent on MDS2.MDS1 associates with CRCK3 in planta and can phosphorylate CRCK3 in vitro,suggesting that it may target CRCK3 to positively regulate SUMM2-mediated signaling.Our finding highlights a new defense mechanism where RLKs promote NLR-mediated immunity. | Yanan Liu Xionghui Zhong Zhibin Zhang Jiameng Lan Xingchuan Huang Hainan Tian Xin Li Yuelin Zhang | 2021 | Journal of Integrative Plant Biology2021，63，2： | 0 |
| 12 | Modification Mechanism and Uniaxial Fatigue Performances of A356.2 Alloy Treated by Al-Sr-La Composite Refinement-Modification Agent显示文摘Modification mechanism and uniaxial fatigue properties of A356.2 alloy treated by Al-6Sr-7La and traditional Al-5Ti-1B/Al-10Sr(hereinafter refers to traditional treated alloy) were investigated by constant stress amplitude method. Microstructure, dislocation and Si twinning of the alloys were studied by thermal analysis, scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The results showed that Al-6Sr-7La possesses better refining and modification effect than Al-5Ti-1B/Al-10Sr. Meanwhile, fatigue properties of the alloy treated by Al-6Sr-7La are higher than traditional treated alloy, and this is mainly owing to that Al-6Sr-7La treated alloy has more twins in eutectic Si and lower twin spacing. In addition, higher density of nanophases formed on twin faces and La-rich clusters appear at multiple twin intersections. Stacking faults and entrapped nanophases appeared on growing Si twin faces. Impurity induced twinning(IIT) mechanism and twin plane re-entrant edge(TPRE) mechanism are valid for eutectic Si which are important for mechanical optimization of A356.2 alloy. | Liang Chang Qingfeng Zhao Xingchuan Xia Yuming Ding Binxu Guo Jian Ding Ying Tang Zan Zhang Chong Li Xiaomian Sun Junjie Guo Kaihong Song Yongchang Liu | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，6： | 0 |
| 13 | Effects of Applying Trace Clements on Yield and Quality of Flue-cured Tobacco Cuibi-1显示文摘[Objectives]To optimize the fertilization technology of flue-cured tobacco Cuibi-1.[Methods]From 2015 to 2016,the experiment of spraying Saikun multi-trace element water-soluble fertilizer was carried out.[Results]7 d and 14 d after transplanting tobacco seedlings,3750 mL/ha,300 times diluted Sakun multi-trace element aqueous solution was sprayed,the growth period of Cuibi-1 in the field was extended by 3-5 d.The incidence of mosaic disease at the rosette stage and granuville wilt at the foot leaf harvesting and curing stage decreased by 4.50-20.85 kg/ha,the yield increased by 67.8-68.7 kg/ha,the proportion of high-quality tobacco increased by 1.29-3.01 percentage points,and the output value increased by 2692.5-3441 yuan/ha,the sensory smoking quality has improved.[Conclusions]Increasing the application of multiple trace elements can increase the economic benefit and industrial use value of tobacco leaf production of Cuibi-1. | Xingchuan HU Yifeng WANG Yufeng DU Yukuo HU Shanhe XU | 2020 | Asian Agricultural Research2020，12，8： | 0 |
| 14 | Influence of support properties on selective oxidation of 2-methylnaphthalene on vanadia-molybdena based catalyst显示文摘In this work,the catalytic performance of vanadia-molybdena loaded on TiO_(2),MgO,ZSM-5,NaY and Mordenite was investigated in the selective oxidation of 2-methylnaphthalene(2-MN)to 2-naphthaldehyde(2-NA).Results show that strong interactions between supports(TiO2,ZSM-5)and active components can promote the dispersion of active component.Monolayer VOx and MoOx are the main form on the catalyst surface,which is beneficial to the 2-NA selectivity.However,the corresponding weak interactions between Mordenite and active components may lead to the production of oxide crystals and the separation of active components,thus reducing the 2-NA selectivity.Due to the high Na content,new crystal NaVMoO6 forms on the NaY surface,which is inactive in the reaction.For V-Mo/TiO2,V and Mo can be inserted into the TiO2 lattice,changing the electronic structures of active components and support and improving the activity of surface oxygen species.This investigation highlights an important consideration on supports properties when designing supported catalysts. | Yi Yu Fanfan Li Xiaocong Li Guoji Liu Li Xu Xingchuan Yang | 2023 | Chinese Journal of Chemical Engineering2023，64，12： | 0 |
| 15 | Microstructure Evolution of Primary γ′ Phase in Ni3Al-Based Superalloy显示文摘In this work,water cooling,air cooling(AC)and furnace cooling(FC)were applied to investigate the effect of cooling rate on microstructure evolution of primaryγ′in a newly designed Ni3Al-based alloy.The results showed that nucleation rate of primaryγ′increased with increasing cooling rate.In addition,higher cooling rate shortened growth period of primaryγ′,which made its morphology close to the initial precipitatedγ′.For AC and FC specimens,due to the lower cooling rate,primaryγ′possessed longer growth period and its morphology was mainly due to the evolution of lattice misfit betweenγand primaryγ′.Meanwhile,growth of primaryγ′depended on lattice misfit distribution between its corner and edge area.Moreover,primaryγ′morphologies of sphere,cube and concave cube with tip corners were illustrated by considering interaction between elemental diffusion and elastic strain energy. | Xin He Jianbo Zhang Yuanyi Peng Jingan Li Jian Ding Chang Liu Xingchuan Xia Xueguang Chen Yongchang Liu | 2020 | Acta Metallurgica Sinica(English Letters)2020，33，12： | 0 |
| 16 | Regional Differentiation Regularity and Influencing Factors of Population Change in the Qinghai-Tibet Plateau, China显示文摘The Qinghai-Tibet Plateau(QTP) is the most unique region of human-land relations, and its main factor is population. By building a population and space dataset of the QTP at the township level from 1982 to 2017, this paper presents the pattern evolvement and regional distribution characteristics of township-level population in the QTP in detail for the first time. By using Geodetector method to analyze the influencing factors of township-level population change in the QTP, this paper provides scientific foundations for studying the Third Pole, ecological environment protection of the QTP, and human-land relations. The conclusions are as follows:1) The population spatial distribution is not balanced at the township level, presents the regional differentiation characteristics of ‘dense in southeast and sparse in northwest’ along the ‘Qilian-Jilong Line’, and demonstrates the phenomenon of population center of gravity moving to the hinterland of the plateau at an accelerated speed;2) The township-level population develops in a decentralized trend in general, and the cold-and hot-spot distribution of population has prominent spatial distribution characteristics. The population hot spots are concentrated in the surrounding areas of Xining, Golmud, Hotan and Lijiang;3) The population of the QTP is increasing, and the inter-annual change of township population has a relatively stable regional regularity;4) The level of per capita income is the leading factor in the change of township population, and its effect intensity is increasing continuously. The relative effect intensity of urbanization level and location conditions on population change has decreased significantly after 2000. The adaptability of living environment,such as topography and climate, has little influence on population change. | GAO Xingchuan LI Tao SUN Dongqi | 2021 | Chinese Geographical Science2021，31，5： | 0 |
| 17 | MXene Quantum Dots/Copper Nanocomposites for Synergistically Enhanced N_(2)Electroreduction显示文摘Electrocatalytic N_(2) reduction reaction(NRR)represents an appealing solution for sustainable ammonia production,whereas exploring high-efficiency NRR catalysts is highly desired but extremely challenging.Herein,we combine Ti_(3) C_(2)T_(x)-MXene quantum dots(MQDs)with porous Cu nanosheets to design a novel heterostructured MQDs/Cu as an effective and durable NRR catalyst.Impressively,MQDs/Cu showed a synergistically enhanced NRR activity with an NH_(3) yield of 78.5 lg h^(-1) mg^(-1)(-0.5 V)and a Faradaic efficiency of 21.3%(-0.4 V),far superior to pure MQDs and Cu,and outperforming the majority of the state-of-the-art NRR catalysts.Density function theory computations demonstrated that the synergy of MQDs and Cu enabled the creation of interfacial Cu-Ti dimer as dual-active-centers to strongly activate the absorbed N 2 and promote the*N_(2)H formation,consequently resulting in the much reduced energy barriers and greatly enhanced NRR performance. | Yonghua Cheng Xingchuan Li Peng Shen Yali Guo Ke Chu | 2023 | Energy & Environmental Materials2023，6，1： | 0 |
| 18 | Hot Deformation Behavior of ATI 718Plus Alloy with Different Microstructures显示文摘In this work, the eff ect of microstructure on hot deformation behavior of ATI 718Plus(hereinafter refers to 718Plus) alloy was studied by isothermal compression test. The results showed that when the strain rate was 0.01–0.1s^(-1) with deformation temperature of 980 and 1030℃, hot deformation behavior was mainly aff ected by dislocation density. Dislocation density of the air-cooling alloy was larger than that of the furnace-cooling alloy, which makes its critical strain smaller and peak stress higher than that of the furnace-cooling alloy. When the strain rate was 1 s^(-1), hot deformation behavior of the alloy was mainly aff ected by twins and γ ′ phase, and high-density deformation twins in air-cooling alloys resulted in higher critical strain. γ ′ phase exists in furnace-cooling alloy, which makes its peak stress higher than that of air-cooling alloy. 718Plus alloy is sensitive to cooling rate;dislocation and γ ′ phase have obvious eff ects on its hot deformation behavior. | Chang Liu Jianbo Zhang Yikai Yang Xingchuan Xia Tian He Jian Ding Ying Tang Zan Zhang Xueguang Chen Yongchang Liu | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，8： | 0 |
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