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高效钙钛矿基叠层太阳能电池的研究进展（英文）

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Science China Materials 2024年

作者：刘欣星陈龙于月何冬梅晒旭霞 sam Zhang 张正富冯晶易健宏陈江照 Faculty of Materials Science and Engineering Kunming University of Science and Technology School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering Shihezi University Institute of Physical and Engineering Science/Faculty of Science Kunming University of Science and Technology School of Aeronautics Harbin Institute of Technology Zhengzhou Research Institute Harbin Institute of Technology

过去十年,钙钛矿太阳能电池(PSC)发展迅速,其光电转换效率从最初的3.8%提升至超过26%,接近单结太阳能电池的Shockley-Queisser (S-Q)极限.多结太阳能电池因其在减少热化损失和实现宽光谱吸收方面的巨大潜力,而受到广泛关注,有望突破S-Q...

过去十年,钙钛矿太阳能电池(PSC)发展迅速,其光电转换效率从最初的3.8%提升至超过26%,接近单结太阳能电池的Shockley-Queisser (S-Q)极限.多结太阳能电池因其在减少热化损失和实现宽光谱吸收方面的巨大潜力,而受到广泛关注,有望突破S-Q极限.金属卤化物钙钛矿材料具有宽带隙可调性,使其非常适合作为叠层太阳能电池(TSC)中的子电池材料.目前,中国隆基绿能科技股份有限公司的双结钙钛矿-硅叠层太阳能电池创造了34.6%的世界纪录效率,远超各子电池的单结效率.因此,基于钙钛矿的叠层太阳能电池被广泛认为是下一代太阳能行业的光伏产品.尽管效率取得了显著提高,但钙钛矿叠层太阳能电池的商业化应用仍面临若干挑战,例如钙钛矿材料的稳定性问题和大规模生产的难度.本综述总结了钙钛矿叠层太阳能电池的研究进展及优化策略,并指出了多结太阳能电池面临的关键问题.最后,本文提出了可能的解决方案,以推进钙钛矿叠层太阳能电池的发展.

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利用择形分子筛异构化亚甲基二苯胺

Chinese Journal of Catalysis 2024年第7期62卷 124-130页

作者： sam Van Minnebruggen Ka Yan Cheung Trees De Baerdemaeker Niels Van Velthoven Matthias Degelin Galahad O’Rourke Hiroto Toyoda Andree Iemhoff Imke Muller Andrei-Nicolae Parvulescu Torsten Mattke Jens Ferbitz 吴勤明肖丰收 Toshiyuki Yokoi Nils Bottke Dirk De Vos 巴斯夫股份有限公司膜分离、吸附、催化和光谱学可持续解决方案中心(cMACS) 比利时巴斯夫股份有限公司研究组德国东京工业大学纳米空间催化研究所横滨日本浙江大学化学系浙江杭州310028

亚甲基二苯胺(MDA)被广泛用作生产聚氨酯和聚异氰脲酸酯的中间体.然而,当前MDA的生产工艺在控制(4,4’/(2,4’+2,2’))异构体比例方面还存在局限.其中,4,4’-MDA被认为是最有价值的异构体.尽管2,4'-MDA在市场上也有一定的需求,但如果能... 详细信息

亚甲基二苯胺(MDA)被广泛用作生产聚氨酯和聚异氰脲酸酯的中间体.然而,当前MDA的生产工艺在控制(4,4’/(2,4’+2,2’))异构体比例方面还存在局限.其中,4,4’-MDA被认为是最有价值的异构体.尽管2,4'-MDA在市场上也有一定的需求,但如果能将其有效地转化为4,4'-MDA,将能显著提升其附加值.本文在使用苯胺的条件下,利用β分子筛等催化剂,通过双分子机制,可以选择性地将2,4'-MDA异构化为4,4'-MDA.尽管实验显示,多种酸性沸石具有较高的异构化活性,但MCM-68(具有MSE拓扑结构)的催化性能尤为出色,它不仅展现出高异构化活性,而且具有很好的选择性.MCM-68主要催化2,4'-MDA异构化为4,4'-MDA,而2,2'-MDA和低聚物的形成则可以忽略不计.本文还深入探讨了该择形作用的原因,并详细研究了酸位置在MSE分子筛孔道限制中的关键作用.

关键词：铝分布多相催化异构化亚甲基二苯胺聚氨酯择形

Influence of carbide ceramic reinforcements in improving tribological properties of A333 graded hybrid composites

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Defence Technology（防务技术） 2022年第7期18卷 1107-1123页

作者： Manu sam N.Radhika Department of Mechanical Engineering Amrita School of EngineeringCoimbatore641112Amrita Vishwa VidyapeethamIndia

Aluminium hybrid functionally graded metal matrix composites(FGMMCs),meet growing demands for supreme tribo-mechanical performance in automotive and aviation *** research experimentally compares the influence of carbide ceramics(B_(4)C,SiC,TiC)as reinforcements,in improving reciprocating tribology performance and mechanical strength of A333 hybrid composites against *** cylindrical samples of A333/6 wt%B_(4)C/4 wt%TiC and A333/6 wt%B_(4)C/4 wt%SiC hybrid FGMMCs were developed using horizontal centrifugal *** analysis on both composites revealed increasing ceramic gradient distribution towards outer composite *** rich zone of A333/B_(4)C/SiC hybrid FGMMC showed maximum micro-hardness(198.9 HV)and tensile strength(267.9 MPa).Elemental mapping confirmed effective distribution of ceramics and detected elemental composition of both *** rich layer of A333/B_(4)C/SiC hybrid FGMMC exhibited improved wear resistance in comparison with all three layers of A333/B_(4)C/TiC hybrid FGMMC and ***-body abrasion and tribo-chemical wear were the predominant mechanisms revealed for both composites during worn surface analysis.

关键词： Composites Functional Wear Carbide ceramics

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从云端到乡野在重庆刷新人生居住体验

城市地理 2024年第7期 78-83页

作者：田敏妤左小朵(图) minjie(图) 甜心爱溜达(图) sam_717(图) 无不详摄图网

在重庆这座繁忙的都市里,长江与嘉陵江交汇,澄江如练,烟景融融,山水变幻。奔流不息的江边,充满历史感的民国建筑述说着昔日繁华;闹市街巷的深处,绿意盎然的新艺术风酒店充满禅意;人们依地势构建房屋,不仅有高居峰巅的云上清舍,还有隐于... 详细信息

在重庆这座繁忙的都市里,长江与嘉陵江交汇,澄江如练,烟景融融,山水变幻。奔流不息的江边,充满历史感的民国建筑述说着昔日繁华;闹市街巷的深处,绿意盎然的新艺术风酒店充满禅意;人们依地势构建房屋,不仅有高居峰巅的云上清舍,还有隐于百年老村的心灵居所……“巫山七百里,巴水三回曲”,重庆这座“中国的君士坦丁堡”,因地形作为军事要塞的开拓历程已成历史,而长江航运带来的无尽繁荣,依旧在今日上演着新的传奇。

关键词：长江航运军事要塞民国建筑历史感君士坦丁堡

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Finite Element Analysis of Ceramic Coatings under Spherical Indentation with Metallic Interlayer: PartⅠUncracked Coatings

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Journal of Materials Science & Technology 2006年第4期22卷 500-510页

作者： Minh-Quy LE Seock-sam KIM Department of Mechanics of Materials and Structures Faculty of Mechanical EngineeringHanoi University of TechnologyDai Co Viet RoadHanoiVietnam School of Mechanical Engineering Kyungpook National UniversityDaegu 701-702Korea

Spherical indentation of ceramic coatings with metallic interlayer was performed by means of axisymmetric finite element analysis （FEA）. Two typical ceramic coatings with relatively high and low elastic modulus deposited on aluminum alloy and carbon steel were considered. Various combinations of indenter radius-coating thickness ratios and interlayer thickness-coating thickness ratios were used in the modeling. The effects of the interlayer, the coating and the substrate on the indentation behavior, such as the radial stress distribution along the coating surface as well as the coating interface, and the plastic deformation zone evolution in the substrate were investigated in connection with the above mentioned ratios. The coating cracking dominant modes were also discussed within the context of the peak tensile stresses on the coating surface and on the coating interface.

关键词： Finite element analysis Ceramic coatings Indentation Interlayer

Element Analysis of Instrumented Sharp Indentations into Pressure-sensitive Materials

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Journal of Materials Science & Technology 2007年第2期23卷 277-282页

作者： Minh-Quy LE Seock-sam KIM Department of Mechanics of Materials & Structures Faculty of Mechanical EngineeringHanoi University of TechnologyDai Co Viet RoadHanoi Vietnam School of Mechanical Engineering Kyungpook National UniversityDaegu 702-701South Korea

Finite element analysis was carried out to investigate the conical indentation response of elastic-plastic solids within the framework of the hydrostatic pressure dependence and the power law strain hardening. A large number of 40 difierent combinations of elasto-plastic properties with n ranging from 0 to 0.5 and σy/E ranging from 0.0014 to 0.03 were used in the computations. The loading curvature C and the average contact pressure Pave were considered within the concept of representative strains and the dimensional *** functions associated with these two parameters were formulated for each studied value of the pressure sensitivity. The results for pressure sensitive materials lie between those for Von Mises materials and the elastic model.

关键词： Finite element analysis Indentation Mechanical Properties Pressure-sensitive materials

Calcium-sensing receptor: A new target for therapy of diarrhea

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World Journal of Gastroenterology 2016年第9期22卷 2711-2724页

作者： sam Xianjun Cheng Department of Pediatrics Gastroenterology Hepatology and Nutrition University of Florida

Management of acute diarrhea remains a global challenge, particularly in resource-limiting countries. Oral rehydration solution (ORS), a passive rehydrating therapy developed approximately 40 years ago, remains the mainstay treatment. Although ORS is effective for hydration, since it does not inhibit enterotoxin-mediated excessive secretion, reduced absorption and compromised barrier function - the primary mechanisms of diarrhea, ORS does not offer a rapid relief of diarrhea symptom. There are a few alternative therapies available, yet the use of these drugs is limited by their expense, lack of availability and/or safety concerns. Novel anti-diarrheal therapeutic approaches, particularly those simple affordable therapies, are needed. This article explores intestinal calcium-sensing receptor (CaSR), a newly uncovered target for therapy of diarrhea. Unlike others, targeting this host antidiarrheal receptor system appears “all-inclusive”: it is anti-secretory, pro-absorptive, anti-motility, and anti-inflammatory. Thus, activating CaSR reverses changes of both secretory and inflammatory diarrheas. Considering its unique property of using simple nutrients such as calcium, polyamines, and certain amino acids/oligopeptides as activators, it is possible that through targeting of CaSR with a combination of specific nutrients, novel oral rehydrating solutions that are inexpensive and practical to use in all countries may be developed.

关键词： Secretory diarrhea Inflammatory diarrhea Oral rehydration solution Anti-secretory Pro-absorptive Intestinal permeability Intestinal barrier function Enteric nervous system Cholera toxin Escherichia coli heat stable toxin

Fixed-time-synchronized control: a system-dimension-categorized approach

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Science China(Information Sciences) 2023年第7期66卷 177-194页

作者： Wanyue JIANG Shuzhi sam GE Dongyu LI Institute for Future & Shandong Key Laboratory of Industrial Control Technology School of Automation Qingdao University Department of Electrical and Computer Engineering National University of Singapore School of Cyber Science and Technology Beihang University Shanghai Institute of Satellite Engineering

This study addresses the fixed-time-synchronized control problem of perturbed multi-input multioutput(MIMO) systems. In the task of fixed-time-synchronized control, different dimensions of the output signal in MIMO systems are required to reach the desired value simultaneously within a fixed time *** MIMO system is categorized into two cases: the input-dimension-dominant and the state-dimensiondominant cases. The classification is defined according to the dimension of system signals and, more importantly, the capability of converging at the same time. For each kind of MIMO system, sufficient Lyapunov conditions for fixed-time-synchronized convergence are explored, and the corresponding robust sliding mode controllers are designed. Moreover, perturbations are compensated using the super-twisting technique. The brake control of the vertical takeoff and landing aircraft is considered to verify the proposed method for the input-dimension-dominant case, which shows the essential advantages of decreasing the energy consumption and the output trajectory length. Furthermore, comparative numerical simulations are performed to show the semi-time-synchronized property for the state-dimension-dominant case.

关键词： fixed-time-synchronized convergence sliding mode control perturbed MIMO systems

New Insights into Dynamic Actin-Based Chloroplast Photorelocation Movement

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Molecular Plant 2011年第5期4卷 771-781页

作者： sam-Geun Kong Masamitsu Wada Department of Biology Graduate School of Sciences Kyushu University 6-10-1 Hakozaki Higashi-ku Fukuoka 812-8581 Japan

Chloroplast movement is essential for plants to survive under various environmental light conditions. Photo- tropins--plant-specific blue-light-activated receptor kinases--mediate the response by perceiving light intensity and direction. Recently, novel chloroplast actin （cp-actin） filaments have been identified as playing a pivotal role in the directional chloroplast photorelocation movement. Encouraging progress has recently been made in this field of research through molecular genetics and cell biological analyses. This review describes factors that have been identified as being involved in chloroplast movement and their roles in the regulation of cp-actin filaments, thus providing a basis for reflection on their biochemical activities and functions.

关键词： Actin filament(s) blue light chloroplast movement cytoskeleton dynamics photoreceptor phototropin.