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| 1 | Crystal Structure Evolution of the Cu-rich Nano Precipitates from bcc to 9R in Reactor Pressure Vessel Model Steel显示文摘The crystal structure evolution of the Cu-rich nano precipitates from bcc to 9R during thermal aging was studied in nuclear reactor pressure vessel(RPV)model steels.The specimens,contained higher copper and nickel contents than commercially available one,were heated at 890 C for 0.5 h and then water quenched followed by tempering at 660 C for 10 h and aging at 400 C for 1000 h.It was observed that bcc and 9R orthogonal structure,as well as 9R orthogonal and 9R monoclinic structure,coexist in a single Cu-rich nano precipitate.Further analyses pointed out that Cu-rich nano precipitates of bcc structure were not stable,it may preferentially transform to 9R orthogonal structure and then to 9R monoclinic structure.This results showed that the crystal structure evolution of the Cu-rich nano precipitates was complex. | Liu FENG Bangxin ZHOU Jianchao PENG Junan WANG | 2013 | Acta Metallurgica Sinica(English Letters)2013，26，6： | 7 |
| 2 | Topology inference of uncertain complex dynamical networks and its applications in hidden nodes detection显示文摘一个复杂动态网络的拓扑的结构在决定网络起一个重要作用进化机制和功能的行为,因此认出并且推断网络结构具有理论、实际的意义。尽管各种各样的途径被建议了估计网络拓扑学,许多很好没在网络个人之中被建立到网络动力学和传播延期的普遍存在的吵闹的性质。这份报纸集中于不明确的复杂动态网络的拓扑学推理。一个辅助网络被构造,一个适应计划被建议追踪拓扑的参数。考虑网络模型应当包含实际随机的不安,是引人注目的,并且吵闹的观察作为构造辅助网络的控制输入被拿。特别地,控制技术能进一步被采用找到隐藏的消息提供者(或潜伏的变量) 在网络。数字例子被提供说明建议计划的有效性。另外,联合力量并且在鉴定性能上联合延期的影响被估计。建议计划向工程师提供一条方便途径推断一般复杂动态网络的拓扑学并且找到隐藏的消息提供者,和评估能进一步便于的详细表演实际电路设计。 | WANG YingFei WU XiaoQun FENG Hui LU JunAn LU JinHu | 2016 | Science China(Technological Sciences)2016，59，8： | 4 |
| 3 | Asymmetric cooperative catalysis in the conjugate addition of pyrazolones to nitroolefins and subsequent dearomative chlorination显示文摘Over the past decade many bifunctional amine-thioureas have been developed as active metal-free organocatalysts.Cooperative catalysis of these amino-thioureas allows high reaction rates and excellent transfer of stereochemical information.Despite these impressive advances,the design of new high-performance catalysts for applications in asymmetric catalytic reactions is of ongoing interest in organic chemistry.Herein we describe a cooperative catalyst system consisting of a chiral aminethiourea and an achiral organic acid that promotes the conjugate addition of 4-nonsubstituted pyrazolones to nitroolefins and subsequent dearomative chlorination.The corresponding adducts and the subsequent products were obtained in high to excellent yields(up to 99%)and high stereoselectivities(up to 99/1 dr,98%ee)under mild reaction conditions.These transformations provide an easy access to enantio-enriched pyrazole derivatives,which could possess potential pharmaceutical activity. | ZHANG KeFeng LI Feng NIE Jing MA JunAn | 2014 | Science China Chemistry2014，57，2： | 0 |
| 4 | Design of ZnSe-CoSe heterostructure decorated in hollow N-doped carbon nanocage with generous adsorption and catalysis sites for the reversibly fast kinetics of polysulfide conversion显示文摘Although lithium-sulfur batteries(Li SBs)are regarded as one of the most promising candidates for the next-generation energy storage system,the actual industrial application is hindered by the sluggish solid–liquid phase conversion kinetics,severe shuttle effect,and low sulfur loadings.Herein,a zeolitic imidazolate framework(ZIF)derived heterogeneous ZnSe-CoSe nanoparticles encapsulated in hollow N-doped carbon nanocage(ZnSe-CoSe-HNC)was designed by etching with tannic acid as a multifunctional electrocatalyst to boost the polysulfide conversion kinetics in LiSBs.The hollow structure in ZIF ensures large inner voids for sulfur and buffering volume expansions.Abundant exposed ZnSe-CoSe heterogeneous interfaces serve as bifunctional adsorption-catalytic centers to accelerate the conversion kinetics and alleviate the shuttle effect.Together with the highly conductive framework,the ZnSe-CoSeHNC/S cathode exhibits a high initial reversible capacity of 1305.3 m A h g-1at 0.2 C,high-rate capability,and reliable cycling stability under high sulfur loading and lean electrolyte(maintaining at 745 m A h g-1after 200 cycles with a high sulfur loading of 6.4 mg cm-2and a low electrolyte/sulfur ratio of 6μL mg^(-1)).Theoretical calculations have demonstrated the heterostructures of ZnSe-CoSe offer higher binding energy to lithium polysulfides than that of ZnSe or CoSe,facilitating the electron transfer to lithium polysulfides.This work provides a novel heterostructure with superior catalytic ability and hollow conductive architecture,paving the way for the practical application of functional sulfur electrodes. | Junan Feng Chuan Shi Hanghang Dong Chaoyue Zhang Wendong Liu Yu Liu Tianyi Wang Xiaoxian Zhao Shuangqiang Chen Jianjun Song | 2023 | Journal of Energy Chemistry2023，，11： | 0 |
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