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Direct growth of Fe3O4-moO2 hybrid nanofilm anode with enhanced electrochemical performance in neutral aqueous electrolyte

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Progress in Natural Science:materials International 2016年第3期26卷 258-263页

作者： Ruizhi Li Xin ba Yimeng Wang Wenhua Zuo Chong Wang Yuanyuan Li Jinping Liu School of Chemistry Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology Institute of Nanoscience and Nanotechnology Department of Physics Central China Normal University School of Optical and Electronic Information Huazhong University of Science and Technology

To enhance the electrochemical energy storage performance of supercapacitors(SCs), the current researches are general directed towards the cathode materials. However, the anode materials are relatively less studied. In the present work, FeO-moO(FO-mO) hybrid nano thin film directly grown on Ti substrate is investigated, which is used as high-performance anode material for SCs in LiSOelectrolyte with the comparison to pristine FeOnanorod array. The areal capacitance of FO-mO hybrid electrode was initially found to be 65.0 m F cmat 2 m Vsand continuously increased to 260.0% after 50 cycles of activation. The capacitance values were considerably comparable or higher than many reported thinfilm iron oxide-based anodes in neutral electrolyte. With the protection of moOshell, the FO-mO electrode developed in this study also exhibited excellent cyclic stability(increased to 230.8% after 1000cycles). This work presents a promising way to improve the electrochemical performance of iron oxidebased anodes for SCs.

关键词： magnetite moO2 Supercapacitor Binder-free anode Hybridization

心脏磁共振评估肾素-血管紧张素-醛固酮系统的心血管相互作用：动脉粥样硬化的多种族研究

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中华高血压杂志(中英文) 2024年第6期32卷 600-600页

作者： Varadarajan V marques mD Venkatesh ba Allison m Ostovaneh mR Yoneyama K Donekal S Shah RV murthy VL Wu CO Tracy RP Ouyang P Rochitte EC Bluemke DA Lima JAC 袁源练桂丽

小型研究已描述了肾素-血管紧张素-醛固酮系统在心血管系统中的作用。该研究旨在探讨醛固酮和血浆肾素活性（plasma renin activity,PRA）与心血管结构和功能的关系。方法：研究者评估在2003-2005年进行醛固酮和PRA检测，并在2010年接...

小型研究已描述了肾素-血管紧张素-醛固酮系统在心血管系统中的作用。该研究旨在探讨醛固酮和血浆肾素活性（plasma renin activity,PRA）与心血管结构和功能的关系。方法：研究者评估在2003-2005年进行醛固酮和PRA检测，并在2010年接受心脏磁共振检查的动脉粥样硬化多种族研究参与者的随机样本。排除服用血管紧张素转换酶抑制药或血管紧张素受体阻滞药的参与者。结果：醛固酮组615例，平均年龄（61.6±8.9）岁；肾素组580例，平均年龄（61.5±8.8）岁，两组女性占比均约50%。

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Effect of γ phase on mechanical behavior and detwinning evolution of directionally solidified Ni-mn-Ga alloys under uniaxial compression

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Journal of materials Science & Technology 2021年第7期66卷 91-96页

作者： Ying Niu Yue Wang Long Hou Lansong ba Yanchao Dai Yves Fautrelle Zongbin Li Zhongming Rena Xi Li State Key Laboratory of Advanced Special Steels Shanghai UniversityShanghai200072China EPm-madylam ENSHMG BP 38402St Martin d'Heres CedexFrance Key Laboratory for Anisotropy and Texture of materials Northeastern UniversityShenyang110819China

Specimens with single-phase martensite, net-like γ/martensite mixed structure and lamella-likeγ/martensite mixed structure were designed to investigate the effect of the γ phase on the mechanical behavior and the detwinning of non-modulated(Nm) martensitic variant in Ni-rich Ni-mn-Ga alloys under uniaxial compression. It can be found the existence of the γ phase significantly enhances the compressive stresses, and the net-like γ phase specimen presents a higher value of compressive strain than that of the lamella-like γ phase specimen. Especially, the detwinning plateau of the lamella-like γ phase specimen is almost invisible due to the martensite colonies with low Schmid factors. Finally, according to the calculation of deformation gradient tensor, we found that the tensors along compression direction(εzz) of net-like γ phase/martensite mixed structure specimen and single-phase martensite specimen are lower than that of the specimen with lamella-like γ phase/martensite mixed structure, which well explained the detwinning strain for these specimens. The present study not only highlights the role ofγ phase on the mechanical behavior, but also provides more guidelines for the mechanical training of Ni-mn-Ga shape memory alloys.

关键词： Ni-mn-Ga alloys Directional solidification Compression Detwinning

云南德钦县一中河泥石流成灾特征及危险性评价

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中国地质灾害与防治学报 2024年第5期35卷 103-109页

作者：宋银陈亮王研何清杨林巴净慧陈典云南地质工程第二勘察院有限公司云南昆明650218 中国地质科学院北京100081 中国地质环境监测院北京100081

云南省德钦县是我国遭受泥石流灾害最严重的地区之一。德钦县一中河曾多次暴发大规模的泥石流灾害,对沟口处居民区及G214国道造成严重破坏和巨大经济损失。为探明一中河上游源区潜在物源在暴雨+地震工况下形成泥石流灾害的危险区范围和... 详细信息

云南省德钦县是我国遭受泥石流灾害最严重的地区之一。德钦县一中河曾多次暴发大规模的泥石流灾害,对沟口处居民区及G214国道造成严重破坏和巨大经济损失。为探明一中河上游源区潜在物源在暴雨+地震工况下形成泥石流灾害的危险区范围和启动机制,在现场调查和成因分析的基础上,以无人机贴近摄影成果高精度的DEm为地形数据,运用RAmmS软件对暴雨+地震工况下体积为16.05×10^(4) m^(3)的泥石流进行模拟,划定了一中河流域内两处危险区,并阐述了一中河泥石流灾害成灾模式。研究结果表明:一中河泥石流属于高原山区沟谷型黏性泥石流,具有规模大、高易发、危害大的特点,其成灾机制概括为高位崩滑体-碎屑流-泥石流-堰塞湖-溃决洪水的沟谷灾害链;危险区Ⅰ位于G214国道至德维路区域,危险区Ⅱ为沟口区域,此区域易发生堆积和堵塞,危险性极高;泥石流运动过程中最大流速达23.93 m/s,最大冲击力为1000 kPa,最大堆积深度为9.33 m,泥石流一次最大冲出体积约8×10^(4) m^(3),危险区范围约0.31 km^(2)。结果可为一中河泥石流治理工程提供科学依据,对德钦县地质灾害综合防治能力提升具有重要实际意义。

关键词：德钦县泥石流 G214国道成灾机制危险区数值模拟

In <i>Vitro</i>Clonal Propagation from Adult material of a Savannah Species of Socio-Economic Importance: <i>Annona senegalensis</i>Pers.

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Agricultural Sciences 2021年第4期12卷 370-386页

作者： Oumar ba Abraham Diémé mame Ourèye Sy Laboratoire Campus de Biotechnologies Végétales Département de Biologie Végétale Faculté des Sciences & Techniques Université Cheikh Anta Diop Dakar Sénégal

Annona senegalensis (Pers.) or Annone from Senegal is a species found in the West African savannah and para-littoral sands. It offers real possibilities of socio-economic use, particularly in the medical, nutritional,... 详细信息

m>Annona senegalensism> (Pers.) or Annone from Senegal is a species found in the West African savannah and para-littoral sands. It offers real possibilities of socio-economic use, particularly in the medical, nutritional, ecosystem conservation and poverty alleviation fields. However, this wild species remained not fully exploited despite its potentialities. As a result, there is a need to regenerate this species;therefore, them> in vitrom> propagation from adult material was undertaken. For this purpose, axillary nodes from plant regrowth taken from elderly subjects were aseptically introduced into different media enriched or not with phytohormones. Among the 3 culture media tested, that of murashige and Skoog (mS, 1962) was the most reactive and made it possible to develop a micropropagation protocol for adult material of m>A. senegalensism>. Thus, the introduction of these explants in media containing cytokinins (baP and Kinetin) significantly increased the reactivity compared to media without hormones. If the best average numbers of shoots (2.3) and nodes (5.3) are obtained in mS + baP 2 mg·L−1, with a reactivity of 91.66%, the addition of 0.1 mg·L−1 NAA gave the best average length (8.25 cm) of vitroplants. An induction time of 3 days into darkness with Iba at 50 mg·L

A novel spiking neural network of receptive field encoding with groups of neurons decision

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Frontiers of Information Technology & Electronic Engineering 2018年第1期19卷 139-150页

作者： Yong-qiang mA Zi-ru WANG Si-yu YU ba-dong CHEN Nan-ning ZHENG Peng-ju REN Institute of Artificial Intelligence and Robotics Xi'an Jiaotong University

Human information processing depends mainly on billions of neurons which constitute a complex neural network,and the information is transmitted in the form of neural *** this paper,we propose a spiking neural network(SNN),named mD-SNN,with three key features:(1) using receptive field to encode spike trains from images;(2) randomly selecting partial spikes as inputs for each neuron to approach the absolute refractory period of the neuron;(3) using groups of neurons to make *** test mD-SNN on the mNIST data set of handwritten digits,and results demonstrate that:(1) Different sizes of receptive fields influence classification results significantly.(2) Considering the neuronal refractory period in the SNN model,increasing the number of neurons in the learning layer could greatly reduce the training time,effectively reduce the probability of over-fitting,and improve the accuracy by 8.77%.(3) Compared with other SNN methods,mD-SNN achieves a better classification;compared with the convolution neural network,mD-SNN maintains flip and rotation invariance(the accuracy can remain at 90.44% on the test set),and it is more suitable for small sample learning(the accuracy can reach 80.15%for 1000 training samples,which is 7.8 times that of CNN).

关键词： Tempotron Receptive field Difference of Gaussian(DoG) Flip invariance Rotation invariance

microstructure evolution and mechanical behavior of Ni-rich Ni-mn-Ga alloys under compressive and tensile stresses

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Journal of materials Science & Technology 2022年第2期97卷 113-122页

作者： Yue Wang Siyuan Yang Ting Zhou Long Hou Lansong ba Yves Fautrelle Zhongming Ren Yanyan Zhu Zongbin Li Xi Li State Key Laboratory of Advanced Special Steels Shanghai UniversityShanghai 200072China Shanghai Key Lab of Advanced High-temperature materials and Precision Forming Shanghai Jiao Tong UniversityShanghai 200240China EPm-madylam ENSHMG BP 38402St Martin d’Heres CedexFrance School of materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory for Anisotropy and Texture of materials Northeastern UniversityShenyang 110819China

The microstructure evolution and mechanical behavior in directionally solidified Ni-rich Ni-mn-Ga alloys with nominal compositions of Ni_(58)mn_(25)Ga_(17) and Ni_(60)mn_(25)Ga_(15) under compressive and tensile stresses have been *** composition distribution shows the element Ni segregates in gamma phase,while elements mn and Ga segregate in martensite ***,the microstructure orientation examined by electron backscatter diffraction(EBSD)indicates that beta phase has a preferred growth orientation of(001)_(A) in Ni_(58)mn_(25)Ga_(17) alloys,while gamma phase has a preferred growth orientation of(001)_(γ) in Ni_(60)mn_(25)Ga_(15) *** fracture morphology suggests that the existence of ductile y phase can reduce the crack propagation and promote fracture strain,particularly in the Ni_(60)mn_(25)Ga_(15) ***,Schmid factor and deformation gradient tensor were calculated to well explain the crystallographic evolution during the detwinning under compressive and tensile *** present findings not only elucidate the mechanism ofγphase on the mechanical behavior of Ni-rich Ni-mn-Ga alloys,but also shed light on the composition design of high temperature Ni-mn-Ga shape memory alloys.

关键词： Ni-mn-Ga Gamma phase Tensile Compressive EBSD

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煤矸石膏体管输充填的骨料级配设计优化

现代矿业 2024年第4期40卷 230-235页

作者：巴蕾付瑞王晶卓庆奉岑旺肖柏林鄂尔多斯职业学院内蒙古伊泰集团有限公司北京科技大学土木与资源工程学院

骨料级配是膏体充填设计的关键参数,针对原始煤矸石粒度粗,不能直接用于制备煤矸石膏体充填的问题,采用室内试验与水硬化模拟相结合的方法,开展破碎煤矸石的级配优化设计研究。结果表明:现场取样的煤矸石干密度为1.614 g/cm^(3),比重为2... 详细信息

骨料级配是膏体充填设计的关键参数,针对原始煤矸石粒度粗,不能直接用于制备煤矸石膏体充填的问题,采用室内试验与水硬化模拟相结合的方法,开展破碎煤矸石的级配优化设计研究。结果表明:现场取样的煤矸石干密度为1.614 g/cm^(3),比重为2.518,70%以上的颗粒粒径大于1 mm,属于块石、砾石,级配不合理;采用泰波理论对破碎煤矸石级配进行设计,在泰波指数n=0.3~0.7范围内,煤矸石的堆积密实度与n具有抛物线形式的关系;当n=0.35时设计的破碎煤矸石骨料具有最大的堆积密实度2.222g/cm^(3),75µm以下的细颗粒占14.2%,可达到膏体的制备标准;泰波指数与特征粒径还有较明显的线性关系,而与曲率系数cc和不均匀系数cu的关系不显著;利用VCCTL水硬化模拟软件,验证了级配n=0.35的煤矸石膏体28 d水化程度达0.78,且膏体的微观结构更致密,预测的力学性能更高,这与细颗粒的填充、成核等效应有关。从堆积密实度试验和水化模拟2个角度验证了级配优化设计的合理性。研究结果对煤矸石膏体充填的设计与优化提供了重要理论基础和指导意义。

关键词：煤矸石膏体充填管道输送级配堆积密实度水化模拟

Electrolyte Concentration Regulation Boosting Zinc Storage Stability of High-Capacity K0.486V2O5 Cathode for Bendable Quasi-Solid-State Zinc Ion batteries

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Nano-micro Letters 2021年第2期13卷 232-245页

作者： Linpo Li Shuailei Liu Wencong Liu Deliang ba Wenyi Liu Qiuyue Gui Yao Chen Zuoqi Hu Yuanyuan Li Jinping Liu School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China School of Chemistry Chemical Engineering and Life Scienceand State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070People’s Republic of China Key Laboratory for Photonic and Electronic bandgap materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025People’s Republic of China

Vanadium-based cathodes have attracted great interest in aqueous zinc ion batteries(AZIBs)due to their large capacities,good rate performance and facile synthesis in large ***,their practical application is greatly hampered by vanadium dissolution issue in conventional dilute ***,taking a new potassium vanadate K0.486V2O5(KVO)cathode with large interlayer spacing(~0.95 nm)and high capacity as an example,we propose that the cycle life of vanadates can be greatly upgraded in AZIBs by regulating the concentration of ZnCl2 electrolyte,but with no need to approach“water-in-salt”*** the optimized moderate concentration of 15 m ZnCl2 electrolyte,the KVO exhibits the best cycling stability with ~95.02% capacity retention after 1400 *** further design a novel sodium carboxymethyl cellulose(CmC)-moderate concentration ZnCl2 gel electrolyte with high ionic conductivity of 10.08 mS cm^-1 for the first time and assemble a quasi-solid-state *** device is bendable with remarkable energy density(268.2 Wh kg^−1),excellent stability(97.35% after 2800 cycles),low self-discharge rate,and good environmental(temperature,pressure)suitability,and is capable of powering small *** device also exhibits good electrochemical performance with high KVO mass loading(5 and 10 mg cm^-2).Our work sheds light on the feasibility of using moderately concentrated electrolyte to address the stability issue of aqueous soluble electrode materials.

关键词： Electrolyte concentration regulation Quasi-solid-state Zn ion battery K0.486V2O5 Large interlayer spacing Cycling stability