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Imparting Pulley Effect and Self-healability to Cathode Binder of Li-S Battery for Improvement of the Cycling Stability

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Chinese Journal of Polymer Science 2023年第1期41卷 95-107页

作者： Zhen-Hua Xie Zi-Xin Huang Ze-ping zhang Min-Zhi Rong Ming-qiu zhang Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education GD HPPC LabSchool of ChemistrySun Yat-Sen UniversityGuangzhou510275China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing100049China Spallation Neutron Source Science Center Dongguan523803China

To construct structurally stable sulfur cathode of Li-S battery with improved cycling performance,poly(acrylic acid)(PAA)crosslinked by cationic hydroxypropyl polyrotaxane(HPRN+)via dynamically reversible boronic ester bonds is synthesized and serves as the cathode *** smart polymer networks offer multifunction including buffering the volume change of the cathode during charge/discharge through the pulley effect of polyrotaxanes(PR),suppressing the shuttle effect by adsorption of polysulfide using the plentiful carboxyl,hydroxyl and quaternary ammonium cationic groups,and self-healing the micro-damages to ensure stable conduction pathways of the *** a result,the Li-S batteries based on this novel multifunctional binder and simple commercial sulfur/carbon composites cathode exhibit excellent specific capacity and cycling *** particular,the specific capacity decay per cycle of the cell is only 0.064%along with high Coulombic efficiency after 550 cycles at 1.0 C,which is superior to most of the reported *** under high sulfur loading,moreover,the cathode can deliver superior areal capacity and cycling *** proposed binder provides a new way for the design of high-stability sulfur cathodes.

关键词： Pulley effect Self-healing Polyrotaxanes Polymer binders Lithium-sulfur battery

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极地多用途船工装脚手架数字化干涉解决策略

船舶标准化工程师 2025年第1期58卷 54-56+79页

作者：张平大连中远海运重工有限公司

工装脚手架是船舶建造过程中必不可少的辅助工装，而结构干涉一直是工装脚手架搭设作业难以回避的问题。以极地多用途运输船为依托，通过梳理设计过程中工装脚手架的数字化设计思路，从设计方法、技术难点和解决策略等方面进行分析，提... 详细信息

工装脚手架是船舶建造过程中必不可少的辅助工装，而结构干涉一直是工装脚手架搭设作业难以回避的问题。以极地多用途运输船为依托，通过梳理设计过程中工装脚手架的数字化设计思路，从设计方法、技术难点和解决策略等方面进行分析，提出一种应用三维模拟技术解决工装脚手架结构干涉问题的方法，结果表明：该方法可有效降低现场工装脚手架出现干涉情况的几率。研究结果对船舶工装脚手架的干涉避碰问题解决具有一定的参考价值。

关键词：极地多用途运输船工装脚手架数字化三维模拟干涉避碰

GeoPyTool:A cross-platform software solution for common geological calculations and plots

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Geoscience Frontiers 2019年第4期10卷 1437-1447页

作者： qiu-Ye Yu Leon Bagas ping-Hua Yang Da zhang China University of Geosciences Beijing 100083China University of Western Australia CrawleyWA 6009Australia

GeoPyTool is an open source application developed for geological calculations and plots,such as geochemical classification,parameter calculation,basic statistical analysis and diagrams for structural *** than acting as a link from raw data stored in Microsoft Excel■(MS Excel)files to vector graphic files,GeoPyTool includes recently developed routines that have not been included in previous software,such as the calculation of the Ce(Ⅳ)/Ce(Ⅲ)ratio for zircons as a method to examine the temporal evolution of oxygen fugacity in the magmatic source for igneous rocks,and the temperature calculator with titanium in zircon and zirconium in *** these routines,GeoPyTool also allows users to load any figure from articles or books as a base *** a Python-based crossplatform program,GeoPyTool works on Windows?,MacOS X?and GNU/*** can do the whole process from data to results without the dependence of Microsoft Excel?,CorelDraw?and other similar *** takes Excel?XLSX and CSV(Comma Separated Value)as the formats of both the input data source files and the output calculation results *** figures generated by GeoPyTool can be saved as portable network graphics(PNG),scalable vector graphics(SVG)or portable document format(PDF).Another highlight of GeoPyTool is the multilingual support,the official versio n of GeoPyTool supports both Chinese and English,and additional languages can be loaded through interface *** is still in the development stage and will be expanded with further geochemical and structural geology *** an open source project,all source code of GeoPyTool are accessible on Github(https://***/GeoPyTool/GeoPyTool).Users with Python experience can join in the development team and build more complex functions expanding the capabilities of GeoPyTool.

关键词： Python Geochemistry Structural geology Calculation Cross platform

In vivo 3-photon fluorescence microscopy of white matter in mouse brain excited at the 1700 nm window

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Journal of Innovative Optical Health Sciences 2024年第5期17卷 81-87页

作者： Jie Huang Jincheng Zhong Shen Tong Yingxian zhang ping qiu Ke Wang Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060P.R.China School of Medical Information and Engineering Xuzhou Medical UniversityXuzhou 221004P.R.China

White matter,a densely packed collection of myelinated axons,plays an essential part in neural *** high spatial resolution and deep penetration,multi-photon microscopy(MPM)is promising for white matter imaging in animal models in *** third harmonic generation(THG)signal can be generated from white matter,but the bottom part of the white matter layer generates weak THG due to its high ***,we demonstrate an in vivo labeling and imaging technology,capable of visualizing the white matter layer in the mouse brain,combining°uorescence labeling with MitoTracker Red and three-photon°uorescence(3PF)microscopy excited at the 1700 nm window.3PF signals are several times higher than THG signals,resulting in deeper imaging of the white matter layer with the *** results indicate that 3PF microscopy is a promising technology for white matter imaging in the deep brain in vivo.

关键词： Three-photon microscopy white matter myelin MitoTracker Red

Fuzzy finite difference method for heat conduction analysis with uncertain parameters

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Acta Mechanica Sinica 2014年第3期30卷 383-390页

作者： Chong Wang Zhi-ping qiu Institute of Solid Mechanics Beihang University

A new numerical technique named as fuzzy finite difference method is proposed to solve the heat conduction problems with fuzzy uncertainties in both the phys- ical parameters and initial/boundary conditions. In virtue of the level-cut method, the difference discrete equations with fuzzy parameters are equivalently transformed into groups of interval equations. New stability analysis theory suited to fuzzy difference schemes is developed. Based on the parameter perturbation method, the interval ranges of the uncertain temperature field can be approximately predicted. Subsequently, fuzzy solutions to the original difference equations are obtained by the fuzzy resolution theorem. Two numerical examples are given to demonstrate the feasibility and efficiency of the presented method for solving both steady-state and transient heat conduction problems.

关键词： Heat conduction Fuzzy uncertainties Finitedifference method Parameter perturbation Stability analysis

Enhanced reductive degradation of carbon tetrachloride by carbon dioxide radical anion-based sodium percarbonate/ Fe（ll）/formic acid system in aqueous solution

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Frontiers of Environmental Science & Engineering 2018年第2期12卷 61-70页

作者： Wenchao Jiang ping Tang Shuguang Lu Xiang zhang Zhaofu qiu Qian Sui State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai 200237 China

The performance of sodium percarbonate （SPC） activated with ferrous ion （Fe（Ⅱ） with the addition of formic acid （FA） to stimulate the degradation of carbon tetrachloride （CT） was investigated. Results showed that CT could be entirely reduced within 15 min in the system at a variety of SPC/Fe（Ⅱ）/FA/CT molar ratios in experimental level. Scavenging tests indicated that carbon dioxide radical anion （CO2-） was the dominant reactive oxygen species responsible for CT degradation. CT degradation rate, to a large extent, increased with increasing dosages of chemical agents and the optimal molar ratio of SPC/Fe（Ⅱ）/FAJCT was set as 60/60/60/1. The initial concentration of CT can hardly affect the CT removal, while CT degradation was favorable in the pH range of 3.0-9.0, but apparently inhibited at pH 12. C1- and HCO3 of high concentration showed negative impact on CT removal. Cl- released from CT was detected and the results confirmed nearly complete mineralization ofCT. CT degradation was proposed by reductive C-C1 bond splitting. This study demonstrated that SPC activated with Fe（Ⅱ） with the addition of FA may be promising technique for CT remediation in contaminated groundwater.

关键词： Carbon tetrachloride Sodium percarbonate Formic acid Reductive radicals Groundwater

Interval finite difference method for steady-state temperature field prediction with interval parameters

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Acta Mechanica Sinica 2014年第2期30卷 161-166页

作者： Chong Wang Zhi-ping qiu Institute of Solid Mechanics Beihang University

A new numerical technique named interval finite difference method is proposed for the steady-state temperature field prediction with uncertainties in both physical parameters and boundary conditions. Interval variables are used to quantitatively describe the uncertain parameters with limited information. Based on different Taylor and Neumann series, two kinds of parameter perturbation methods are presented to approximately yield the ranges of the uncertain temperature field. By comparing the results with traditional Monte Carlo simulation, a numerical example is given to demonstrate the feasibility and effectiveness of the proposed method for solving steady-state heat conduction problem with uncertain-but-bounded parameters.

关键词： Steady-state heat conduction Interval finite dif-ference Temperature field prediction Parameter perturba-tion method Interval uncertainties

Fatigue reliability based on residual strength model with hybrid uncertain parameters

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Acta Mechanica Sinica 2012年第1期28卷 112-117页

作者： Jun Wang Zhi-ping qiu Institute of Solid Mechanics Beihang University100191 BeijingChina

The aim of this paper is to evaluate the fatigue reliability with hybrid uncertain parameters based on a residual strength model. By solving the non-probabilistic setbased reliability problem and analyzing the reliability with randomness, the fatigue reliability with hybrid parameters can be obtained. The presented hybrid model can adequately consider all uncertainties affecting the fatigue reliability with hybrid uncertain parameters. A comparison among the presented hybrid model, non-probabilistic set-theoretic model and the conventional random model is made through two typical numerical examples. The results show that the presented hybrid model, which can ensure structural security, is effective and practical.

关键词： Fatigue reliability Residual strength Ran- dom model Non-probabilistic set-theoretic model Hybrid model

Analysis on dye-sensitized solar cells based on Fe-doped TiO_2 by intensity-modulated photocurrent spectroscopy and Mott-Schottky

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Chinese Chemical Letters 2014年第6期25卷 953-956页

作者： qiu-ping Liu School of Pubic Policy and Management Tsinghua University Beijing National Laboratory for Molecular Sciences Key Laboratory of PhotochemistryInstitute of ChemistryChinese Academy of Sciences

The pure TiO2 and Fe salts [Fe（C2O4）3,5H2O]-doped TiO2 electrodes were prepared by the hydrothermal method. The pure TiO2 or Fe-doped TiO2 slurry was coated onto the fluorine-doped tin oxide glass substrate by the Doctor Blade method and then sintered at 450 ℃. The Mott-Schottks, plot indicates that the fiat band potential of TiO2 was shifted positively after Fe-doped TiO2. The positive shift of the fiat band potential improves the driving force of injected electrons from the LUMO of the dye to the conduction band of TiO2. This study shows that photovoltaic efficiency increased by 22.9% from 6.07% to 7.46% compared to pure TiO2, and the fill factors increased from 0.53 to 0.63.

关键词： Dye sensitized solar cells Titanium dioxide Fe-doped film Photovoltaic performance Flat band potential