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Durable poly(binaphthyl-co-p-terphenyl piperidinium)-based anion exchange membranes with dual side chains

Journal of Energy Chemistry 2024年第2期89卷 324-335,I0008页

作者： weiting.gao Xuelang gao Qiugen Zhang Aimei Zhu Qinglin Liu Department of Chemical&Biochemical Engineering Fujian Provincial Key Laboratory of Theoretical and Computational ChemistryThe College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Department of Chemistry Pohang University of Science and Technology(POSTECH)Pohang 790-784South Korea

Building well-developed ion-conductive highways is highly desirable for anion exchange membranes(AEMs).Grafting side chain is a highly effective approach for constructing a well-defined phaseseparated morphological structure and forming unblocked ion pathways in AEMs for fast ion *** of side chains can further enhance phase separation due to the superhydrophobic nature of fluorine ***,their electronic effect on the alkaline stability of side chains and membranes is rarely ***,fluorine-containing and fluorine-free side chains are introduced into the polyaromatic backbone in proper configuration to investigate the impact of the fluorine terminal group on the stability of the side chains and membrane *** poly(binaphthyl-co-p-terphenyl piperidinium)AEM(QBNp TP)has the highest molecular weight and most dimensional stability due to its favorable backbone arrangement among ortho-and meta-terphenyl based ***,by introducing both a fluorinated piperidinium side chain and a hexane chain into the p-terphenyl-based backbone,the prepared AEM(QBNp TP-QFC)presents an enhanced conductivity(150.6 m S cm^(-1))and a constrained swelling at 80℃.The electronic effect of fluorinated side chains is contemplated by experiments and *** results demonstrate that the presence of strong electro-withdrawing fluorine groups weakens the electronic cloud of adjacent C atoms,increasing OH^(-)attack on the C atom and improving the stability of piperidinium *** QBNp TP-QFC possesses a robust alkaline stability at 80℃(95.3%conductivity retention after testing in 2 M Na OH for 2160 h).An excellent peak power density of 1.44 W cm^(-2)and a remarkable durability at 80℃(4.5%voltage loss after 100 h)can be observed.

关键词： Anion exchange membranes Backbone structure Fluorinated side chain Alkaline stability

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Parameter calibration of the tensile-shear interactive damage constitutive model for sandstone failure

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1153-1174页

作者： Yun Shu Zheming Zhu Meng Wang weiting.gao Fei Wang Duanying Wan Yuntao Wang MOE Key Laboratory of Deep Earth Science and Engineering College of Architecture and EnvironmentSichuan UniversityChengdu610065China Failure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan ProvinceSichuan UniversityChengdu610065China Tianfu Engineering-oriented Numerical Simulation & Software Innovation Center Chengdu620107China

The tensile-shear interactive damage(TSID)model is a novel and powerful constitutive model for rock-like *** study proposes a methodology to calibrate the TSID model parameters to simulate *** basic parameters of sandstone are determined through a series of static and dynamic tests,including uniaxial compression,Brazilian disc,triaxial compression under varying confining pressures,hydrostatic compression,and dynamic compression and tensile tests with a split Hopkinson pressure *** on the sandstone test results from this study and previous research,a step-by-step procedure for parameter calibration is outlined,which accounts for the categories of the strength surface,equation of state(EOS),strain rate effect,and *** calibrated parameters are verified through numerical tests that correspond to the experimental loading *** between numerical results and experimental data indicates the precision and reliability of the calibrated *** methodology presented in this study is scientifically sound,straightforward,and essential for improving the TSID ***,it has the potential to contribute to other rock constitutive models,particularly new user-defined models.

关键词： Damage constitutive model Parameter calibration Rock modeling Sandstone Dynamic impact load Tensile-shear interactive damage(TSID)model

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AZ31B镁合金超双疏表面的制备及其耐蚀性研究

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中国腐蚀与防护学报 2024年第2期44卷 381-388页

作者：司伟婷张吉昊高荣杰中国海洋大学材料科学与工程学院青岛266400

以AZ31B镁合金为基底,利用HNO3溶液刻蚀结合1H,1H,2H,2H-全氟癸基三乙氧基硅烷(PFDTES)修饰的方法,成功制备了超双疏表面,其对于水的接触角为159.3°,乙二醇的接触角为155.2°。电化学测试结果表明,相较于裸样,其腐蚀电位正移297 mV,腐... 详细信息

以AZ31B镁合金为基底,利用HNO3溶液刻蚀结合1H,1H,2H,2H-全氟癸基三乙氧基硅烷(PFDTES)修饰的方法,成功制备了超双疏表面,其对于水的接触角为159.3°,乙二醇的接触角为155.2°。电化学测试结果表明,相较于裸样,其腐蚀电位正移297 mV,腐蚀电流密度降低了3个数量级,电荷转移电阻提升了2个数量级,耐腐蚀效果得到良好提升,即使在3.5%NaCl溶液中浸泡72 h,依然保持较好的耐蚀性。

关键词：超双疏表面镁合金化学刻蚀腐蚀防护

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土壤微生物膜对沙生植物幼苗光合和荧光特性的影响

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干旱区研究 2024年第2期41卷 272-283页

作者：吴玮婷王雨高广磊张英丁国栋曹红雨北京林业大学水土保持学院北京100083 宁夏盐池毛乌素沙地生态系统国家定位观测研究站宁夏盐池751500 林业生态工程教育部工程研究中心北京100083 水土保持国家林业和草原局重点实验室北京100083 林木资源高效生产全国重点实验室北京100083

为揭示土壤微生物膜对沙生植物幼苗光合和荧光特性的影响,以沙冬青(Ammopiptanthus mongolicus)和沙打旺(Astragalus laxmannii)幼苗为研究对象,设置不同菌剂施用方式(喷施、混施)和施用量(0、1、3、5、7 g·kg^(-1)和10g·kg^(-1))开... 详细信息

为揭示土壤微生物膜对沙生植物幼苗光合和荧光特性的影响,以沙冬青(Ammopiptanthus mongolicus)和沙打旺(Astragalus laxmannii)幼苗为研究对象,设置不同菌剂施用方式(喷施、混施)和施用量(0、1、3、5、7 g·kg^(-1)和10g·kg^(-1))开展盆栽试验,比较分析土壤微生物膜形成后植物气体交换和叶绿素荧光特征。结果表明:(1)当菌剂施用量>3 g·kg^(-1)时,固结层硬度、厚度和土壤脲酶、蔗糖酶活性均显著高于对照组(P5 g·kg^(-1)时沙打旺最大光化学效率(F_(v)/F_(m))显著高于对照组(P<0.05)。除3 g·kg^(-1)处理组之外,沙冬青F_(v)/F_(m)和光化学猝灭系数(QP)均高于沙打旺。(4)土壤特性、光合气体交换和叶绿素荧光三者为部分中介模型,土壤特性的改变能直接影响沙冬青和沙打旺叶绿素荧光特性。土壤微生物膜使固结层硬度和厚度平均提高3.84%和152.85%,土壤过氧化氢酶、脲酶和蔗糖酶活性平均增强93.37%、170.68%和256.03%。其通过改善土壤质量、提高叶片气孔导度从而增强沙冬青和沙打旺光合效率和能力,使沙打旺和沙冬青净光合速率平均提高28.48%,F_(v)/F_(m)平均提高0.84%。

关键词：土壤微生物膜沙生植物光合作用叶绿素荧光

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基于变权重组合模型的灌溉水有效利用系数预测

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南水北调与水利科技（中英文） 2024年第4期22卷 719-727页

作者：李涛杨路华张玮婷王妍高立川天津农学院水利工程学院天津300392 滦平县水务局河北滦平068250

通过逐步回归法分析影响灌溉水有效利用系数各因素的重要程度,筛选出节水灌溉面积为影响灌溉水有效利用系数的关键因素。考虑关键因素与时间序列两方面,基于逐步回归法、GM(1,1)模型和Logistic生长模型构建变权重组合模型。变权重组合... 详细信息

通过逐步回归法分析影响灌溉水有效利用系数各因素的重要程度,筛选出节水灌溉面积为影响灌溉水有效利用系数的关键因素。考虑关键因素与时间序列两方面,基于逐步回归法、GM(1,1)模型和Logistic生长模型构建变权重组合模型。变权重组合模型的预测精度优于各单项模型,模拟效果与实际符合度高,适用于灌溉水有效利用系数的预测。最后采用变权重组合模型对广东省2023-2035年灌溉水有效利用系数进行预测分析。2023-2035年广东省灌溉水有效系数逐年提高,其中2035年预测值达到0.679 2,高于全国绝大多数灌溉水有效利用系数的现状值。变权重组合模型预测法可为农业水资源规划与灌溉管理提供科学参考。

关键词：灌溉水有效利用系数逐步回归法灰色GM(1,1)模型 Logistic生长模型变权重组合模型

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A highly reliable embedding algorithm for airborne tactical network virtualization

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Journal of Systems Engineering and Electronics 2021年第6期32卷 1364-1374页

作者： MIAO Jingcheng LYU Na CHEN Kefan CHEN Zhuo gao weiting College of Information and Navigation Air Force Engineering UniversityXi’an 710077China Unit 94860 of the PLA Nanjing 210000China

The evolution of airborne tactical networks(ATNs)is impeded by the network ossification *** a solution,network virtualization(NV)can provide a flexible and scalable architecture where virtual network embedding(VNE)is a key ***,existing VNE algorithms cannot be optimally adopted in the virtualization of ATN due to the complex interference in aircombat *** this context,a highly reliable VNE algorithm based on the transmission rate for ATN virtualization(TR-ATVNE)is proposed to adapt well to the specific electromagnetic environment of *** algorithm coordinates node and link *** the node mapping,transmission-rate resource is firstly defined to effectively evaluate the ranking value of substrate nodes under the interference of both environmental noises and enemy ***,a feasible splitting rule is proposed for path splitting in the link mapping,considering the interference between wireless *** results reveal that our algorithm is able to improve the acceptance ratio of virtual network requests while maintaining a high revenue-to-cost ratio under the complex electromagnetic interference.

关键词： airborne tactical network(ATN) network virtualization(NV) resource allocation virtual network embedding(VNE) transmission rate

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硫掺杂强化铜基氮化碳材料电催化还原CO_(2)

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化工环保 2024年第3期44卷 441-448页

作者：高凤如刘志超肖发沂石颖颖俞伟婷胡俊山东畜牧兽医职业学院动物科技学院山东潍坊261061 浙江一龙环保科技有限公司浙江杭州310000 浙江工业大学环境学院浙江杭州310014

制备了硫掺杂铜基氮化碳(CuSx-C_(3)N_(4))催化材料,运用SEM、EDS、TEM、XRD、XPS等技术对其进行了表征,并将其用于以CO为目标产物的电催化CO_(2)还原反应(CO_(2)RR),采用CO法拉第效率和分电流密度分别表征催化材料的CO选择性和催化活... 详细信息

制备了硫掺杂铜基氮化碳(CuSx-C_(3)N_(4))催化材料,运用SEM、EDS、TEM、XRD、XPS等技术对其进行了表征,并将其用于以CO为目标产物的电催化CO_(2)还原反应(CO_(2)RR),采用CO法拉第效率和分电流密度分别表征催化材料的CO选择性和催化活性。结果表明:硫掺杂提高了Cu-C_(3)N_(4)材料的CO选择性和催化活性;在掺硫量为1.5%、电位为-0.65 V(相对于可逆氢电极)的最佳条件下,CuSx-C_(3)N_(4)材料的CO选择性最高,CO法拉第效率高达90%;吡啶N比石墨N更易催化CO_(2)RR生成CO,硫掺杂提高了催化材料中吡啶N的占比;相对于Cu-C_(3)N_(4)材料,掺硫量为1.5%的CuSx-C_(3)N_(4)材料中吡啶N占比从22%升至35%,石墨N占比从15%降至12%。

关键词：硫掺杂铜基氮化碳电催化 CO_(2)还原 CO选择性催化活性

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心脏康复患者运动恐惧体验质性研究的Meta整合

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中华护理杂志 2024年第4期59卷 474-481页

作者：刘建萍郭卫婷高伟王文君盛源范春梅鲁琦刘德山山东大学齐鲁医院急诊科济南市250012 山东大学齐鲁医院PICC门诊济南市250012 山东大学齐鲁医院中医科济南市250012 山东大学护理与康复学院

目的系统分析与评价心脏康复患者运动恐惧的心理体验。方法检索PubMed、Web of Science、Ovid电子期刊全文数据库、Embase、CINAHL、PsycINFO、Cochrane Library、中国知网、中国生物医学文献数据库、万方数据库、维普数据库及美国心脏... 详细信息

目的系统分析与评价心脏康复患者运动恐惧的心理体验。方法检索PubMed、Web of Science、Ovid电子期刊全文数据库、Embase、CINAHL、PsycINFO、Cochrane Library、中国知网、中国生物医学文献数据库、万方数据库、维普数据库及美国心脏协会、欧洲心脏病学会、美国心肺康复协会等网站关于心脏康复患者运动恐惧体验的质性研究,检索时限为建库至2023年6月。根据澳大利亚乔安娜布里格斯研究所循证卫生保健中心质性研究质量评价标准(2016版)评价文献质量,采用汇集性整合法进行Meta整合。结果共纳入14篇文献,提取45个明确的研究结果,将相似结果归纳成10个类别,3个整合结果:运动恐惧受多重因素影响;运动恐惧影响患者生活体验;降低运动恐惧的策略。结论护理人员应重视心脏康复患者运动恐惧心理,采取相应干预措施,协助患者克服运动恐惧的心理障碍,完善个性化运动方案,提高身体活动水平。

关键词：心脏康复运动恐惧心理体验质性研究 Meta整合循证护理学

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Thermal effects on fracture toughness of cracked straight-through Brazilian disk green sandstone and granite

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第5期14卷 1447-1460页

作者： Lei Zhou weiting.gao Liyuan Yu Zheming Zhu Jianxing Chen Xingkai Wang Key Laboratory of Deep Earth Science and Engineering Ministry of EducationSichuan UniversityChengdu610065China State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhou221116China Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan ProvinceSichuan UniversityChengdu610065China Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province Shaoxing UniversityShaoxing312000China

Cracked straight-through Brazilian disc(CSTBD) samples prepared using two rock materials were used for thermal treatment from room temperature to 700℃. Uniaxial splitting experiments were performed using an automatic electro-hydraulic servo press to study the evolution laws of physical and fracture properties of different deep rock materials under high-temperature geological conditions. The fracture characteristics were measured using an industrial camera and digital image correlation technology to analyze the effect of high temperature on fracture properties and failure modes of the CSTBD samples after different thermal treatments. The micro-damage properties of green sandstone and granite materials were obtained using a scanning electron microscope(SEM). The following conclusions were drawn from the test results:(1) With the increasing temperature, the fracture characteristics of green sandstone and granite change from brittle fracture to plasticity fracture, the longitudinal wave velocity of granite decreases sharply at 600℃, and the damage factor reaches 0.8748 at 700℃.(2) The fracture toughness of green sandstone and granite decreases with increasing temperature;however, the decreasing range of granite is larger than that of green sandstone.(3) As the temperature increases, the fracture morphologies of green sandstone and granite materials become rougher, whereas thermal damage cracks of granite and intergranular fractures inside sandstone as well as pores of sandstone increase.(4) The crack tip opening displacement and peak strain corresponding to peak load increase with the temperature.

关键词： High temperature Cracked straight-through Brazilian disc(CSTBD)sample Fracture toughnessm Scanning electron microscope(SEM)

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Coupled GIMP and CPDI material point method in modelling blast-induced three-dimensional rock fracture

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International Journal of Mining Science and Technology 2022年第5期32卷 1097-1114页

作者： Duanying Wan Meng Wang Zheming Zhu Fei Wang Lei Zhou Ruifeng Liu weiting.gao Yun Shu Hu Xiao MOE Key Laboratory of Deep Earth Science and Engineering College of Architecture and EnvironmentSichuan UniversityChengdu 610065China Failure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan ProvinceSichuan UniversityChengdu 610065China State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resources and HydropowerSichuan UniversityChengdu 610065China College of Civil and Architecture Engineering Panzhihua UniversityPanzhihua 617099China

Three-dimensional rock fracture induced by blasting is a highly complex problem and has received considerable attention in geotechnical *** material point method is firstly applied to treat this challenging *** inherent weaknesses can be overcome by coupling the generalized interpolation material point(GIMP)and the convected particle domain interpolation technique(CPDI).For the media in the borehole,unchanged GIMP-type particles are used to guarantee a homogenous blast *** type particles are employed to avoid the fake numerical fracture near the borehole for the rock material.A blasting experiment using three-dimensional single-borehole rock was simulated to examine the applicability of the coupled model under realistic loading and boundary conditions.A good agreement was achieved between the simulation and experimental ***,the mechanism of three-dimensional rock fracture was *** was concluded that rock particle size and material parameters play an important role in rock *** reflected tensile waves cause severe damage in the lower part of the *** waves occur on the top face of the rock model to induce a hoop failure band.

关键词： Material point method(MPM) Convected particle domain interpolation (CPDI) Generalized interpolation material point (GIMP) Rock fracture Blast

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