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Superhydrophobic and corrosion-resistant siloxane-modified MgAl-LDHs coatings on magnesium alloy prepared under mild conditions

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 450-463页

作者： wenxi zhang zhangzelong Zhuo Dan Xu Liang Wu Zhihui Xie Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China College of Materials Science and Engineering/National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China

We have developed a superhydrophobic and corrosion-resistant LDH-W/PFDTMS composite coating on the surface of Mg *** composite comprised a tungstate-intercalated(LDH-W)underlayer that was grown at low temperature(relative to hydrothermal reaction conditions)under atmospheric pressure and an outer polysiloxane layer created from a solution containing perfluorodecyltrimethoxysilane(PFDTMS)using a simple immersion *** successful intercalation of tungstate into the LDH phase and the following formation of the polysiloxane layer were confirmed through X-ray diffraction(XRD),Fourier transform infrared(FTIR)spectroscopy,and X-ray photoelectron spectroscopy(XPS).The corrosion resistance of the LDH-W film,both before and after the PFDTMS modification,was evaluated using electrochemical impedance spectroscopy(EIS),Tafel curves,and immersion *** results showed that Mg coated with LDH-W/PFDTMS exhibited significantly enhanced corrosion protection compared to the unmodified LDHW film,with no apparent signs of corrosion after exposure to 3.5wt%NaCl solution for 15 ***,the LDH-W/PFDTMS coating demonstrated superior superhydrophobicity and self-cleaning properties against water and several common beverages,as confirmed by static contact angle and water-repellency *** results offer valuable insights into preparing superhydrophobic and corrosion-resistant LDH-based composite coatings on Mg alloy surfaces under relatively mild reaction conditions.

关键词： Mg alloy corrosion coating layered double hydroxide

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Photometric modeling of the Moon using Lommel-Seeliger function and Chang'E-1 IIM data

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Chinese Science Bulletin 2013年第36期58卷 4588-4592页

作者： zhang Jiang LING ZongCheng zhang wenxi REN Xin LI ChunLai LIU JianZhong School of Physics Shandong University School of Space Science and Physics & Shandong Provincial Key Laboratory of Optical Astronomy & Solar-Terrestrial Environment Shandong University Academy of Opto-Electronics Chinese Academy of Sciences National Astronomical Observatories Chinese Academy of Sciences Institute of Geochemistry Chinese Academy of Sciences

The imaging interferometer(IIM)aboard the Chang’E-1 lunar orbiter is the first multispectral imaging spectrometer for Chinese lunar *** science applications(e.g.,FeO and TiO2mapping)of the IIM raw data,the radiance variation due to changes in illumination and viewing geometry has to be removed from the radiometrically calibrated IIM Level 2A *** achieve this,we fit the IIM Level 2A radiance data with a Lommel-Seeliger photometric model consisting of an exponential term and a fourth order polynomial in the phase function,without distinguishing between lunar maria and *** exponential and the fourth order polynomial parameters are derived separately by fitting to two datasets divided at a solar phase angle threshold,avoiding a decrease in the phase function close to zero phase *** phase angle thresholds result in coincident fitting curves between 20°and 75°,while large discrepancies occur at other phase *** the derived photometric model is used to normalize the IIM Level 2A data to radiance values at an incidence and phase angle of 30°and emission angle of 0°.Our photometric model is validated by comparing two photometrically normalized IIM radiance spectra covering the same areas,showing a relative deviation consistent with the IIM preflight calibration.

关键词：月球探测器嫦娥一号光度成像光谱仪建模 M数辐射校准相位角

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Prediction of rock-burst-threatened areas in an island coal face and its prevention:A case study

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International Journal of Mining Science and Technology 2016年第6期26卷 1125-1133页

作者： Li Xuehua Pan Fan Li Huaizhen Zhao Min Ding Lingxiao zhang wenxi School of Mines China University of Mining and Technology State Key Laboratory of Deep Coal Resource Mining China University of Mining and TechnologyXuzhou School of Energy Science and Engineering Henan Polytechnic University

The island coal face arises in coal mines with the purpose of preventing gas explosion or maintaining the balance between mining and tunneling. However, its particular stress conditions in the surrounding rock may increase the difficulty of stress control in the coal face and in its mining roadways, especially when the coal seam, the roof, and the floor have rock-burst propensities, The high energy accumulated in the island coal face and in its roof and floor will intensify rock-burst propensity or even induce rock burst, which further result in great casualties and financial losses. Taking island coal face 2321 in Jinqiao coal mine as a case, we propose a method for the prediction of rock-burst-threatened areas in an island coal face with weak rock-burst propensity. Based on the anaHysis of the movement of the overlying roof and characteristics of stress distribution, this method combined numerical simulation with drilling bits to ensure the prediction accuracy. The effects of coal pillars with different widths on the mitigation of stress concentration in the coal face and on the prevention of rock burst are analyzed together with the mech- anism behind. Finally, corresponding measures against the rock burst in the island coal face are proposed.

关键词： Island coal face Rock burst Stress evolution Numerical simulation Stress relief technology

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Polymer passivation of defects in inorganic perovskite solar cells

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Optoelectronics Letters 2022年第6期18卷 338-342页

作者： zhang Meng zhang Fanghui SHI Kewang zhang wenxi HUANG Jin QIU Huimin School of Electrical and Control Engineering Shaanxi University of Science&TechnologyXi'an 710021China School of Electronic Information and Artificial Intelligence Shaanxi University of Science and TechnologyXi'an 710021China

Inorganic perovskite solar cells(IPSCs)have attained attention due to their excellent thermal and phase *** this work,we demonstrate a novel approach for fabricating IPSCs,using the strategies of interface passivation and anti-solvent before spin-coating ***(methyl methacrylate)(PMMA)and chlorobenzene(CB)are used as passivator and anti-solvent,*** CB improves the perovskite crystal ***,PMMA passivates the defects between poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT:PSS)and perovskite layer,thus increasing the short-circuit ***,we find that PMMA benefits the grain boundaries(GBs)of perovskite,which makes it more humidity-resistant,increasing the stability of perovskite ***,PMMA mitigates interfacial charge losses,and the devices based on CsPbI_(3-x)Br_(x)passivated by PMMA exhibit the power conversion efficiency(PCE)much higher than those based on pure CsPbI_(3-x)Br_(x).

关键词： perovskite humidity interfacial

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Carbon Storage Capacity of Different Plantation Types Under Sandstorm Source Control Program in Hebei Province, China

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Chinese Geographical Science 2014年第4期24卷 454-460页

作者： SHEN Huitao zhang Wanjun YANG Xue LIU Xiuping CAO Jiansheng ZENG Xinhua ZHAO Xin CHEN Xuexun zhang wenxi Key Laboratory of Agricultural Water Resources Hebei Key Laboratory of Agricultural Water-Saving Center for Agricultural Resources Research Institute of Genetics and Developmental BiologyChinese Academy of Sciences Agriculture School Kunming University Forestry Bureau of Aohan Banner Forestry Bureau of Hexigten Banner

Afforestation and reforestation are effective and ecological ways of mitigating elevated atmospheric carbon dioxide(CO2) concentration and increasing carbon(C) storage in terrestrial ecosystems. In this study, we measured the above-ground(tree, herbaceous plants and litter) and below-ground(root and soil) C storage in an aspen plantation(Populus davidiana) monoculture(PD), a larch plantation(Larix pincipis-rupprechtii) monoculture(LP), a pine plantation(Pinus tabulaeformis) monoculture(PT), a larch and birch mixed plantation(L. pincipis-rupprechtii and Betula platyphlla mixed)(MLB), and an apricot plantation(Armeniaca sibirica) monoculture(AS) under the Desertification Combating Program in Hebei Province, the northern China. The objective was to assess the effect of afforestation species on ecosystem C pools of different plantation types. Results showed that C storage of LP stand(258.0 Mg/ha) and MLB(163.4 Mg/ha) were significantly higher than the C storage in PD(45.5 Mg/ha), PT(58.9 Mg/ha) and AS(49.4 Mg/ha), respectively. Soil C was the main carbon pool of the ecosystem C storage in the five plantation stands, ranging from 31.4 Mg/ha to 232.5 Mg/ha, which accounted for 69.0%–90.1% of the total ecosystem C storage. The C storage in tree layer was about 5.2%–23.2% of ecosystem C storage. The herbaceous plants and litter layers contained 1.0%–6.0% and 1.5%–3.3% of ecosystem C storage, respectively. Our results suggest that tree species should be incorporated to accurately develop regional C budget of afforestation program, and also imply that substantial differences in ecosystem C stocks among plantation types can facilitate decision making on C management.

关键词： carbon content carbon storage forestry program tree species

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Preliminary results of TiO_2 mapping using Imaging Interferometer data from Chang'E-1

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Chinese Science Bulletin 2011年第20期56卷 2082-2087页

作者： LING ZongCheng zhang Jiang LIU JianZhong zhang wenxi zhang GuangLiang LIU Bin REN Xin MU LingLi LIU JianJun LI ChunLai National Astronomical Observatories Chinese Academy of SciencesBeijing 100012China School of Space Science and Physics & Shandong Provincial Key Laboratory of Optical Astronomy & Solar-Terrestrial Environment Shandong University at WeihaiWeihai 264209China Academy of Opto-Electronics Chinese Academy of SciencesBeijing 100080China

The distribution of titanium abundance on the lunar surface is important knowledge for lunar geologic studies and future resource *** this paper,we develop a preliminary model based on"ground truths"from Apollo and Luna sample-return sites to produce a titanium abundance map from Chang’E-1 Imaging Interferometer(IIM) *** derived TiO2 abundances are validated with Clementine UVVIS results in several regions,including lunar highlands neighboring the Apollo 16 landing site,and high-Ti and low-Ti maria near the standard site of Mare Serenitatis(MS2) .The validation results show that TiO2 abundances modeled with Chang’E-1 IIM data are overestimated for highlands(～0.7 wt.%) and low-Ti maria(～1.5 wt.%) and underestimated for high-Ti maria(～0.8 wt.%).

关键词：二氧化钛干涉仪嫦娥一号成像映射月球表面资源利用率玛丽亚

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Preliminary results of FeO mapping using Imaging Interferometer data from Chang'E-1

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Chinese Science Bulletin 2011年第4期56卷 376-379页

作者： LING ZongCheng zhang Jiang LIU JianZhong zhang wenxi BIAN Wei REN Xin MU LingLi LIU JianJun LI ChunLai National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China School of Space Science and Physics & Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Shandong University at Weihai Weihai 264209 China Academy of Opto -Electronics Chinese Academy of Sciences Beijing 100080 China

Information about the variability,and spatial distribution of iron abundance is important to understand lunar geological history and for future resource utilization. In this paper we present a preliminary model to produce an iron abundance map using images taken by an Imaging Interferometer on board the satellite Chang'E-1. Compared with the Clementine UVVIS images,the images from the Chang'E-1 satellite also allowed for the extraction of FeO abundance distributions on the Moon. However,the prelimi-nary model results suggest an underestimation of ～2 wt.% for the FeO content of the mare region and an overestimation of ～3 wt.% for the highland region.

关键词： FeO含量嫦娥一号干涉仪像数映射资源利用率空间分布地质历史

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对《资本论》进行哲学阅读的困难和门槛

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哲学研究 2020年第6期 14-24,127页

作者：张文喜中国人民大学哲学院

《资本论》是关于现代资本主义生产方式和它所产生的资产阶级社会的特殊运动规律的科学。作为一门科学,它的生命在于它所开创的对哲学的新型表达方式的探索。我们确信《资本论》包含着如何能够写出这个伟大文本的客观记述。这个规定决... 详细信息

《资本论》是关于现代资本主义生产方式和它所产生的资产阶级社会的特殊运动规律的科学。作为一门科学,它的生命在于它所开创的对哲学的新型表达方式的探索。我们确信《资本论》包含着如何能够写出这个伟大文本的客观记述。这个规定决定了阅读这部著作的原则。其中,在逻辑统一性和文本稳定性中最重要的相关者有三:读者的资格,未说出的和已经说出的东西,以及文本本身对阅读方式的客观规定。在主题层次上,阿尔都塞以科学和意识形态断裂为由对《资本论》进行的哲学阅读,遮蔽了言说马克思主义哲学的客观方式。作为对马克思主义哲学阅读理解的一部分,我们当前思考现实社会问题的重点在于聚焦《资本论》沉默的地方并揭示这种沉默包含的内容。

关键词：《资本论》阅读表达方式

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对学术志业的哲学反思

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浙江工商大学学报 2023年第3期 37-44页

作者：张文喜中国人民大学哲学院

一种作为职业的学术研究有其严格有限的意义。哲学在如何自我展现为绝对知识过程中，产生了西方哲学的特殊难题。它对于整个人类文明作为研究对象却具有深刻的意义。与“面包学者”不同，“真正的学者”要求认识到真正的知识和任务；约... 详细信息

一种作为职业的学术研究有其严格有限的意义。哲学在如何自我展现为绝对知识过程中，产生了西方哲学的特殊难题。它对于整个人类文明作为研究对象却具有深刻的意义。与“面包学者”不同，“真正的学者”要求认识到真正的知识和任务；约束自己的意志，老老实实地去学习，老老实实地做学问；持续不断地对自己学术研究不满，长久地对人类生活的真谛苦苦求索；从哲学批判角度去领会知识民主、平等的局限性；不能偏离创造之道。每一种科学通过表述它跟普遍性与特殊性的邂逅或融贯来言说自身。理性认识使科学的根据变得显明，历史认识使科学的事实变得清楚。

关键词：学术学者哲学反思

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在学术和体系建构中的当代中国马克思主义哲学

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中国社会科学 2020年第2期 4-24,204页

作者：张文喜中国人民大学哲学院教授北京100872

按其最内在的本质,“学术”绝不仅仅是一种形式上的规定,其本身就是能够进入思境和内在脉络的理路。倘若在学术和体系建构中的马克思主义哲学完全合乎它的精神实质、意义和价值,那通过马克思主义哲学切中社会现实的道路就变得明朗和清... 详细信息

按其最内在的本质,“学术”绝不仅仅是一种形式上的规定,其本身就是能够进入思境和内在脉络的理路。倘若在学术和体系建构中的马克思主义哲学完全合乎它的精神实质、意义和价值,那通过马克思主义哲学切中社会现实的道路就变得明朗和清晰。从马克思主义哲学自身性质的规定出发,学术高度是在其发展进程中对以黑格尔为代表的西方形而上学体系批判才达到的。建构当代中国马克思主义哲学学术体系,首先应该把批判所要求的付诸实践。学术或学科所要求的,则是专注于体系的积极建构、积极创新,唤醒崇高的人类力量。就衡量马克思主义哲学学术体系的标准、尺度、指令以及关键之处而言,应当清楚地看到对时代精神中占统治地位的知性原则进行全面批判的必要性和重要性,尤为关键的是对唯物主义的社会主义倾向作重新阐明。

关键词：马克思主义哲学学术体系建构社会主义

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