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Modification strategies for non-aqueous, highly proton-conductive benzimidazole-based high-temperature proton exchange membranes

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Chinese Chemical Letters 2024年第4期35卷 43-51页

作者： Yunfa Dong Shijie Zhong Yuhui He Zhezhi liu shengyu Zhou Qun Li Yashuai Pang Haodong Xie Yuanpeng Ji Yuanpeng liu Jiecai Han Weidong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080China School of Petroleum Engineering Chongqing University of Science and TechnologyChongqing 401331China School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401151China School of Mechanical Engineering Chengdu UniversityChengdu 610106China

High-temperature proton exchange membranes(HT-PEMs) possess excellent thermal and outstanding electrochemical stability, providing an avenue to realize high-temperature proton exchange membranes fuel cells(HT-PEMFCs) with both superior power density and long-term durability. Unfortunately, polybenzimidazole(PBI), a typical material for conventional HT-PEMs, fails to compromise the high nonaqueous proton conductivity and high mechanical properties, thus hindering their practical *** efficient nonaqueous proton conduction is crucial for HT-PEMFC, and many insightful research works have been done in this area. However, there still lacks a report that integrates the host-guest interactions of phosphoric acid doping and the structural stability of polymers to systematically illustrate modification strategies. Here, we summarize recent advancements in enhancing the nonaqueous proton conduction of HT-PEMs. Various polymer structure modification strategies, including main chain and side group modification, cross-linking, blocking, and branching, are reviewed. Composite approaches of polymer, including compounding with organic porous polymers, filling the inorganic components and modifying with ionic liquids, etc., are also covered in this work. These strategies endow the HT-PEMs with more free volume, nanophase-separated structure, and multi-stage proton transfer channels, which can facilitate the proton transportation and improve their performance. Finally, current challenges and future directions for further enhancements are also outlined.

关键词： Benzimidazole Nonaqueous proton conduction Free volume Nanophase-separated structure Structure modification

A Parallel Platform for Web Text Mining

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ZTE Communications 2013年第3期11卷 56-61页

作者： Ping Lu Zhenjiang Dong Shengmei Luo Lixia liu Shanshan Guan shengyu liu Qingcai Chen ZTE Corporation Shenzhen Graduate School Harbin Institute of Technology

With user-generated content, anyone can De a content creator. This phenomenon has infinitely increased the amount of information circulated online, and it is beeoming harder to efficiently obtain required information. In this paper, we describe how natural language processing and text mining can be parallelized using Hadoop and Message Passing Interface. We propose a parallel web text mining platform that processes massive amounts data quickly and efficiently. Our web knowledge service platform is designed to collect information about the IT and telecommunications industries from the web and process this in-formation using natural language processing and data-mining techniques.

关键词： natural language processing text mining massive data paral-lel web knowledge service

Changes in Sediment Sources in the Southern Muddy Area of Weihai, China, Since the Late Pleistocene: A Record from Rare Earth Elements

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Journal of Ocean University of China 2024年第5期23卷 1221-1232页

作者： ZHANG Zhichao liu Jinqing YIN Ping CAO Ke FENG Xiaokun WANG shengyu College of Earth Science and Engineering Shandong University of Science and Technology State Key Laboratory of Marine Geology School of Ocean and Earth Science Tongji University Qingdao Institute of Marine Geology China Geological Survey

The small muddy areas developed in the southern Shandong Peninsula have attracted increasing attention from researchers because of complex changes in sediment sources driven by sea-level fluctuations and land-sea interactions since the late Pleistocene. This study investigates the evolution of sediment sources and their responses to environmental changes since the late Pleistocene, using core WHZK01 collected from the nearshore muddy area in southern Weihai for rare earth element(REE) analysis. In doing so, this work highlights the changing patterns of material sources and the primary control factors. The results reveal that the sedimentary deposits in core WHZK01 exhibit distinct terrestrial characteristics. Discriminant function analysis(FD) and source discrimination diagrams both suggest that the primary sources of these deposits are the Yellow River and adjacent small and medium-sized rivers, although the sources vary among different sedimentary units. Furthermore, the DU3 layer(17.82 – 25.10 m) displays typical riverine sedimentation, dominated by terrestrial detrital input, primarily from the local rivers, namely the Huanglei and Muzhu Rivers. The material in the DU2 layer(14.91 – 17.82 m) is mainly influenced by a mixture of the Qinglong and Yellow Rivers. The DU1 layer(0 – 14.91 m) is influenced by sea-level changes during the Holocene, with the Yellow River being the primary source, although there is also some input from local rivers. The changes in sea level during the Holocene and the input of Yellow River material carried by the coastal currents of the Yellow Sea are identified as the main controlling factors for the changes in material sources in the study area since the late Pleistocene, with small and medium-sized rivers also exerting some influence on the material sources. The above mentioned findings not only contribute to a better understanding of the source-sink systems of the Yellow River and adjacent small and mediumsized rivers but also deepen

关键词： environmental evolution muddy area rare earth element source identification southern Weihai

基于模糊比例积分控制的商用车驻车空调控制器设计

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机械制造 2024年第1期62卷 21-25,28页

作者：刘圣宇汤廷孝邓益民宁波大学机械工程与力学学院浙江宁波315211

驻车空调控制系统是一个非线性、强耦合复杂控制系统,传统驻车空调控制系统存在调节时间长、控制精度低、能耗高等问题,难以满足不同环境下的控制需求。基于模糊比例积分控制,设计了商用车驻车空调控制器。通过AMEsim软件建模分析,针对... 详细信息

驻车空调控制系统是一个非线性、强耦合复杂控制系统,传统驻车空调控制系统存在调节时间长、控制精度低、能耗高等问题,难以满足不同环境下的控制需求。基于模糊比例积分控制,设计了商用车驻车空调控制器。通过AMEsim软件建模分析,针对驻车空调的主要可控部件蒸发风机、冷凝风机、压缩机设计了各自独立的模糊比例积分控制器。采用AMEsim软件和MATLAB软件Simulink模块联合仿真,搭建驻车空调控制系统模型,并对传统比例积分控制和模糊比例积分控制进行对比。仿真结果表明,模糊比例积分控制相较于传统比例积分控制,在温度控制方面具有更高的控制精度和动态性能,调节时间明显缩短,无超调,同时还具有更高的能效比。

关键词：汽车空调模糊比例积分控制器设计

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GIPC1 promotes tumor growth and migration in gastric cancer via activating PDGFR/PI3K/AKT signaling

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Oncology Research 2024年第2期32卷 361-371页

作者： TINGTING LI WEI ZHONG liu YANG ZHIYU ZHAO LI WANG CONG liu WANYUN LI HAIYAN LV shengyu WANG JIANGHUA YAN TING WU GANG SONG FANGHONG LUO Cancer Research Center School of MedicineXiamen UniversityXiamen361000China Department of Pharmacy Xiamen Mental Health CenterXiamen Xianyue HospitalXiamen361000China

The high mortality rate associated with gastric cancer(GC)has resulted in an urgent need to identify novel therapeutic targets for *** study aimed to investigate whether GAIP interacting protein,C terminus 1(GIPC1)represents a therapeutic target and its regulating mechanism in ***1 expression was elevated in GC tissues,liver metastasis tissues,and lymph node ***1 knockdown or GIPC1 blocking peptide blocked the platelet-derived growth factor receptor(PDGFR)/PI3K/AKT signaling pathway,and inhibited the proliferation and migration of GC ***,GIPC1 overexpression markedly activated the PDGFR/PI3K/AKT signaling pathway,and promoted GC cell proliferation and ***,platelet-derived growth factor subunit BB(PDGF-BB)cytokines and the AKT inhibitor attenuated the effect of differential GIPC1 ***,GIPC1 silencing decreased tumor growth and migration in BALB/c nude mice,while GIPC1 overexpression had contrasting *** together,our findings suggest that GIPC1 functions as an oncogene in GC and plays a central role in regulating cell proliferation and migration via the PDGFR/PI3K/AKT signaling pathway.

关键词： GIPC1 PDGFR Gastric cancer Proliferation Migration

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添加有机酸强化粗颗粒石灰石烟气脱硫

化工学报 2006年第4期57卷 927-931页

作者：刘盛余刘晓飞肖文德华东理工大学化学反应工程联合国家重点实验室上海200237

针对传统石灰石湿法烟气脱硫成本高的问题,提出了一种新型石灰石石膏法烟气脱硫方法,即通过在石灰石浆液中加入有机酸,采用大尺寸石灰石165～200μm(-80+100目)代替传统的47μm(325目)以下的细颗粒石灰石进行脱硫,同时在鼓泡搅拌吸收反... 详细信息

针对传统石灰石湿法烟气脱硫成本高的问题,提出了一种新型石灰石石膏法烟气脱硫方法,即通过在石灰石浆液中加入有机酸,采用大尺寸石灰石165～200μm(-80+100目)代替传统的47μm(325目)以下的细颗粒石灰石进行脱硫,同时在鼓泡搅拌吸收反应器脱硫装置上与传统石灰石湿法烟气脱硫进行了对比实验.研究结果表明,只采用165～200μm石灰石浆液直接脱硫其脱硫率和石灰石利用率分别为60.7%和44%,但当石灰石(165～200μm)浆液中乙酸浓度达到10～30mmol·L-1,其脱硫率和石灰石利用率分别为95%和93.5%,都达到甚至优于传统石灰石脱硫中的结果,新型石灰石湿法脱硫系统的pH值在正常的脱硫区间波动也较小.在此基础上,提出了添加乙酸促进SO2吸收的机理.本文提出的新型烟气脱硫方法具有很好的工业应用前景.

关键词：新型湿法烟气脱硫有机酸鼓泡吸收反应器粗颗粒石灰石

C12EO9对煤油在低阶煤表面铺展性的影响

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煤炭转化 2020年第2期43卷 11-16页

作者：郝孟刘生玉张雷太原理工大学矿业工程学院

为了促进捕收剂在低阶煤中有机质表面的铺展,提高其浮选效率,根据非离子表面活性剂在有机质和无机质表面吸附特性的不同,进行了十二烷基醇聚氧乙烯醚(C 12 EO 9)在煤及矸石表面吸附量、润湿热测定及捕收剂煤油在吸附C 12 EO 9前后的样... 详细信息

为了促进捕收剂在低阶煤中有机质表面的铺展,提高其浮选效率,根据非离子表面活性剂在有机质和无机质表面吸附特性的不同,进行了十二烷基醇聚氧乙烯醚(C 12 EO 9)在煤及矸石表面吸附量、润湿热测定及捕收剂煤油在吸附C 12 EO 9前后的样品表面的铺展性研究。结果表明:随着初始浓度的增加,C 12 EO 9在煤及矸石表面的吸附量差异和润湿性差异增大;吸附C 12 EO 9后,煤油在煤表面的吸附量减少55.11%,润湿热增加58.53%,而煤油在矸石表面的吸附量基本不变,润湿热增加15.56%。表面活性剂吸附增大了煤油与煤之间的作用程度,使其更容易在煤表面铺展。浮选结果证实表面活性剂预处理促进了煤油在低阶煤表面的铺展性,提高了煤油的使用效率。

关键词：非离子表面活性剂低阶煤矸石捕收剂铺展性

氧化煤对CTAB的吸附性能及表面润湿性改性

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煤炭转化 2015年第3期38卷 16-21页

作者：郝盼刘生玉太原理工大学矿业工程学院太原硕士生030024

为研究表面活性剂在氧化煤表面的吸附特性及其对煤表面润湿性的影响,系统考察了溶液温度、初始浓度、溶液pH值和吸附时间对阳离子表面活性剂十六烷基三甲基溴化铵（CTAB）在氧化煤表面吸附量的影响,研究了吸附CTAB对氧化煤表面润湿性改... 详细信息

为研究表面活性剂在氧化煤表面的吸附特性及其对煤表面润湿性的影响,系统考察了溶液温度、初始浓度、溶液pH值和吸附时间对阳离子表面活性剂十六烷基三甲基溴化铵（CTAB）在氧化煤表面吸附量的影响,研究了吸附CTAB对氧化煤表面润湿性改性的影响。结果表明,提高温度,增大CTAB溶液初始浓度,会增加CTAB在氧化煤表面的吸附量,CTAB溶液pH值在5～7之间时,有利于CTAB与煤吸附过程的进行;氧化煤表面极性含氧官能团的增加明显有利于CTAB在煤表面的吸附。氧化煤吸附CTAB后,接触角随时间变化由急剧减小变为略有下降,平衡接触角由0°变为70°,水分复吸率下降,其表面润湿性发生了明显的由亲水性向疏水性的反转。

关键词：十六烷基三甲基溴化铵吸附润湿性氧化煤

Si_(19.8)Ti_(26.4)Cr_(10.1)Mn_(13.3)Fe_(18.6)Ni_(11.8)单相高熵合金结构与性能

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特种铸造及有色合金 2024年第1期44卷 36-40页

作者：刘晟宇黄伟屹杨舒琴周义明陈基略贺翠云姜汝意广西大学资源环境与材料学院南宁530000

通过试错法在AlSiTiCrMnFeNi合金体系中寻找有望成为高温结构材料的多元单相高熵合金,并通过DSC和硬度测试判断其性能。试验发现一种具有HCP结构的6元单相高熵合金,其成分为τ-Si_(19.8)Ti_(26.4)Cr_(10.1)Mn_(13.3)Fe_(18.6)Ni_(11.8)... 详细信息

通过试错法在AlSiTiCrMnFeNi合金体系中寻找有望成为高温结构材料的多元单相高熵合金,并通过DSC和硬度测试判断其性能。试验发现一种具有HCP结构的6元单相高熵合金,其成分为τ-Si_(19.8)Ti_(26.4)Cr_(10.1)Mn_(13.3)Fe_(18.6)Ni_(11.8),硬度(HV)高达963.6,在1 400℃以下不发生相变,相结构稳定,具有优良的硬度和热稳定性。

关键词：高熵合金单相热稳定性 HCP