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Boundedness of multilinear operators on generalized Morrey spaces

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Applied Mathematics(A Journal of Chinese Universities) 2014年第2期29卷 127-138页

作者： YU xiao TAO xiang-xing Department of Mathematics Shangrao Normal University Department of Mathematics Zhejiang University of Science and Technology

In this paper, the authors prove the boundedness of the multilinear maximal func- tions, multilinear singular integrals and multilinear Riesz potential on the product generalized Rn Rn Morrey spaces Mp1,ωw1 （Rn）... 详细信息

关键词： multilinear singular integral multilinear Riesz potential generalized Morrey space multilinearmaximal function.

Synthesis, Self-assembly and pH Sensitivity of a Novel Fluorinated Triphilic Block Copolymer

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Chinese Journal of Polymer Science 2017年第11期35卷 1363-1372页

作者：李欣欣 xiao Huo Hui-jiao Han 林绍梁 Key Laboratory of Specially Functional Polymeric Materials and Related Technology of the Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Key Laboratory of Advanced Polymeric Materials East China University of Science and Technology

A novel fluorinated triblock copolymer incorporating 2-ethylhexyl methacrylate （EHMA）, tert-butyl methacrylate （tBMA） and 1H,1H,2H,2H-perfluorodecyl acrylate （FA）（PEHMA-b-PtBMA-b-PFA） was first synthesized using three successive reversible addition fragmentation chain transfer （RAFT） polymerization and the subsequent hydrolyzing at acidic condition. The as-fabricated triblock copolymer exhibited an interesting morphology evolution from the multi-compartment rod-like structure to spherical structure along with the addition of a selective solution. At the same time, a visible phase separation domain could be seen in the core area due to the existence of fluorocarbon segments. Furthermore, the self- assembly behavior of the triphilic copolymer at different pH was also verified by transmission electron microscopy, as well as the dynamic light scattering. These stimuli-responsive multi-compartment nanostructures may have potential applications in drug delivery.

关键词： Triphilic block copolymer Self-assembly pH sensitivity Fluorinated copolymer Multi-compartment structure

Photoacoustic treatment mitigates cognitive dysfunction in a model of sleep-wake rhythm disturbance

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Neural Regeneration Research 2020年第6期15卷 1094-1101页

作者： Fang Xing Xin Fang xiang-Dan Gong Xin Zhao Ying Du Zheng-Liang Ma xiao-Ping Gu Tian-jiao Xia Department of Anesthesiology Affiliated Drum Tower Hospital of Medical Department of Nanjing UniversityNanjingJiangsu ProvinceChina Jiangsu Key Laboratory of Molecular Medicine Nanjing UniversityNanjingJiangsu ProvinceChina

Sleep-wake rhythm disturbances,which are characterized by abnormal sleep timing or duration,are associated with cognitive *** treatments including light and sound stimulation have been found to be effective in modulating sleep patterns and improving cognitive behavior in abnormal sleep-wake pattern *** this study,we examined whether light and sound interventions could reduce sleep-wake pattern disturbances and memory deficits in a sleep rhythm disturbance *** established a model of sleep rhythm disturbance in C57 BL/6 J mice via a sleep deprivation method involving manual cage tapping,cage jostling,and nest *** used a Mini Mitter radio transmitter device to monitor motor activity in the mice and fear conditioning tests to assess cognitive *** results indicated that an intervention in which the mice were exposed to blue light(40-Hz flickering frequency)for 1 hour during their subjective daytime significantly improved the 24-hour-acrophase shift and reduced the degree of memory deficit induced by sleep ***,interventions in which the mice were exposed to a 40-Hz blue light at offset time or subjective night time points,as well as 2 Hz-blue light at 3 intervention time points(subjective day time,subjective night time,and offset time points),had no positive effects on circadian rhythm shift or memory ***,a 2000-Hz sound intervention during subjective day time attenuated the24-hour-acrophase shift and memory decline,while 440-Hz and 4000-Hz sounds had no effect on circadian ***,these results demonstrate that photoacoustic treatment effectively corrected abnormal sleep-wake patterns and cognitive dysfunction associated with sleep-deprivation-induced disturbances in sleep-wake *** animal experiments were approved by the Experimental Animal Ethics Committee of Drum Tower Hospital Affiliated to the Medical College of Nanjing University,China(approval No.20171102)on N

关键词： circadian rhythm cognitive impairment fear conditioning light intervention photoacoustic treatment rhythm disturbance rhythm shift sleep deprivation sleep-wake rhythm sound intervention

DIRECT MEASUREMENT OF WEAK DEPLETION FORCE BETWEEN TWO SURFACES

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Chinese Journal of Polymer Science 2011年第1期29卷 1-11页

作者： xiang-jun Gong xiao-chen Xing xiao-ling Wei To Ngai Department of Chemistry the Chinese University ofHong Kong Shatin N.T. Hong Kong China Department of Physics the Chinese University ofHong Kong Shatin N.T. Hong Kong China

In a mixture of colloidal particles and polymer molecules, the particles may experience an attractive ＂depletion force＂ if the size of the polymer molecule is larger than the interparticle separation. This is because individual polymer molecules experience less conformational entropy if they stay between the particles than they escape the inter-particle space, which results in an osmotic pressure imbalance inside and outside the gap and leads to interparticle attraction. This depletion force has been the subject of several studies since the 1980s, but the direct measurement of this force is still experimentally challenging as it requires the detection of energy variations of the order of kBT and beyond. We present here our results for applying total internal reflection microscopy （TIRM） to directly measure the interaction between a free-moving particle and a flat surface in solutions consisting of small water-soluble organic molecules or polymeric surfactants. Our results indicate that stable nanobubbles （ca. 150 nm） exist free in the above aqueous solutions. More importantly, the existence of such nanobubbles induces an attraction between the spherical particle and flat surface. Using TIRM, we are able to directly measure such weak interaction with a range up to 100 nm. Furthermore, we demonstrate that by employing thermo^sensitive microgel particles as a depleting agent, we are able to quantitatively measure and reversibly control kBT-scale depletion attraction as function of solution pH.

关键词： Depletion interaction Total internal reflection microscopy (TIRM) Nanobubbles Microgel particles

Facile Fabrication of Core-Shell Structure Fe_(3)O_(4)@C Nanodots for Enhanced Lithium-Sulfur Batteries

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Acta Metallurgica Sinica(English Letters) 2021年第3期34卷 410-416页

作者： xiang-Rui He Yu-jiao Zhang Li-Fan Yang Ji-Lu Zhao Hong-Tai Li Yi-Bo Gao Bao Wang xiao-Dong Guo School of Chemical Engineering Sichuan UniversityChengdu 610065China State Key Laboratory of Biochemical Engineering.Instituteof Process Engineering Chinese Academy of SciencesBeijing 100190China School of Chemistry Sun Yat-Sen UniversityGuangzhou 510275China

Lithium sulfur battery(LSB) is widely considered as a next-generation battery system due to its high theoretical energy density of 2567 Wh ***,several inherent issues obstruct the business application of *** address these issues,we assemble core-shell structure Fe_(3)O_(4)@C nanodots with 5 nm diameter as a valid sulfur host via a convenient organic pyrolysis treatment followed by *** nanosized Fe3O4 particles could expose more chemisorption sites and inhibit the polysulfides ***,the carbon layer could not only increase the conductivity but also ensure structural integrity during cyclic ***,the mesoporous channels around Fe_(3)O_(4)@C could supply sufficient space to load sulfur and physically restrict the shuttle of ***,the resultant S/Fe_(3)O_(4)@C cathode shows a highly initial capacity of 1089 mAh g^(-1) at 0.2 C,even retains 655 mAh g^(-1) over 200 cycles at 1 C.

关键词： Fe(3)O_(4) Nanodots Cathode Lithium–sulfur batteries

基于虚拟教研室开展智慧教研的价值、困境及路径

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教学与管理 2025年第1期 29-33页

作者：刘晓宇张衍伟李高建尹娇泰山学院教师教育研究院山东泰安271021 山东省泰安市教育科学研究院山东泰安271021

步入数字教育时代,以虚拟教研室为服务平台,智慧教研为核心驱动的新质教育形态受到教研工作者的广泛关注。以虚拟教研室的构成要素、功能模块为内涵和技术基础,并从教师与教育管理的角度阐述了基于虚拟教研室的智慧教研的价值意蕴,同时... 详细信息

步入数字教育时代,以虚拟教研室为服务平台,智慧教研为核心驱动的新质教育形态受到教研工作者的广泛关注。以虚拟教研室的构成要素、功能模块为内涵和技术基础,并从教师与教育管理的角度阐述了基于虚拟教研室的智慧教研的价值意蕴,同时解析了从技术瓶颈、教师接受度以及资源投入和管理等方面所带来的现实困境,并提出了基于虚拟教研室的智慧教研的实施路径,包括虚拟教研室平台的建设与运营管理、技术设备和网络环境的改善、教师培训和支持以及教研内容和方法的创新。

关键词：虚拟教研室智慧教研教研创新

Multiple Measurement Models of Articulated Arm Coordinate Measuring Machines

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Chinese Journal of Mechanical Engineering 2015年第5期28卷 994-998页

作者： ZHENG Dateng xiao Zhongyue XIA xiang College of Mechanical & Electrical Engineering Jinggangshan University

The existing articulated arm coordinate measuring machines（AACMM） with one measurement model are easy to cause low measurement accuracy because the whole sampling space is much bigger than the result in the unstable calibration parameters. To compensate for the deficiency of one measurement model, the multiple measurement models are built by the Denavit-Hartenberg＇s notation, the homemade standard rod components are used as a calibration tool and the Levenberg-Marquardt calibration algorithm is applied to solve the structural parameters in the measurement models. During the tests of multiple measurement models, the sample areas are selected in two situations. It is found that the measurement errors＇ sigma value（0.083 4 ram） dealt with one measurement model is nearly two times larger than that of the multiple measurement models（0.043 1 ram） in the same sample area. While in the different sample area, the measurement errors＇ sigma value（0.054 0 ram） dealt with the multiple measurement models is about 40% of one measurement model（0.137 3 mm）. The preliminary results suggest that the measurement accuracy of AACMM dealt with multiple measurement models is superior to the accuracy of the existing machine with one measurement model. This paper proposes the multiple measurement models to improve the measurement accuracy of AACMM without increasing any hardware cost.

关键词： articulated arm coordinate measuring machine multiple measurement models sample area measurement accuracy

Rational Design of WO_3 Nanostructures as the Anode Materials for Lithium-Ion Batteries with Enhanced Electrochemical Performance

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Nano-Micro Letters 2015年第1期7卷 12-16页

作者： Yang Liu Yang jiao Haiyue Zhou xiang Yu Fengyu Qu xiang Wu Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of Education and College of Chemistry and Chemical Engineering Harbin Normal University

A facile, one-step hydrothermal method was employed to synthesize two kinds of WO3 nanostructures. By using different kinds of sylvine, tungsten trioxide(WO3) with different morphologies of microflowers and nanowires was obtained, respectively. The discharge capacities for microflowers and nanowires are 107 and 146 m Ah g-1 after 180 cycles, and their corresponding capacity retentions after the first cycle are 72 and 85 %, respectively. Even at a high current density of 1,600 m Ah g-1, the discharge capacities of WO3 microflowers and nanowires are as high as 433 and557 m Ah g-1 after 40 cycles, in which the current densities were increased stepwise. It is worth mentioned that the rate capability of the nanowires is superior to that of the microflowers. However, the cycle performance of the microflowers is better than nanowires, revealing that the morphology and structure of the as-synthesized WO3 products can exert great influence on the electrochemical performances.

关键词： WO3 nanostructures Anode materials Li-ion batteries

3D skeleton nanostructured Ni_3S_2/Ni foam@RGO composite anode for high-performance dual-ion battery

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Journal of Energy Chemistry 2019年第1期28卷 144-150页

作者： Shuai Wang Jiguo Tu Jiusan xiao Jun Zhu Shuqiang jiao State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing

The growing global demands of safe, low-cost and high working voltage energy storage devices trigger strong interests in novel battery concepts beyond state-of-art lithium-ion battery. Herein, a dualion battery based on nanostructured Ni_3S_2/Ni foam@RGO(NSNR) composite anode is developed, utilizing graphite as cathode material and LiPF6-VC-based solvent as electrolyte. The battery operates at high working voltage of 4.2–4.5 V, with superior discharge capacity of ～90 m A h g^(-1) at 100 mA g^(-1), outstanding rate performance, and long-term cycling stability over 500 cycles with discharge capacity retention of ～85.6%. Moreover, the composite simultaneously acts as the anode material and the current collector, and the corrosion phenomenon can be greatly reduced compared to metallic Al anode. Thus, this work represents a significant step forward for practical safe, low-cost and high working voltage dual-ion batteries,showing attractive potential for future energy storage application.

关键词： Dual-ion battery Nanostructured Ni3S2/Ni foam@RGO composite High working voltage Long-term cycling