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A bilateral cyano molecule serving as an effective additive enables high-efficiency and stable perovskite solar cells

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Journal of Energy Chemistry 2021年第11期30卷 243-251,I0006页

作者： Pengyun Liu Huimin Xiang wei wa.g Ran Ran wei Zhou Zongping Shao wa School of Mines:Minerals Energy and Chemical Engineering(WASM-MECE)Curtin UniversityPerthWA 6845Australia College of Chemical Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 210009JiangsuChina

The existence of defects in perovskite films is a major obstacle that prevents perovskite solar cells (PSCs) from high efficiency and long-term stability. A variety of additives have been introduced into perovskite films for reducing the number of defects. Lewis base-based additive engineering has been considered as an effective way to eliminate defects, especially the defects caused by the uncoordinated Pb^(2+). In this work, for the first time, a bilateral cyano molecule (succinonitrile, SN) which is a commonly used plasticizer in solid electrolyte of solid-state lithium batteries was selected as an additive to modify organic–inorganic hybrid perovskite films in PSCs. SN is featured with two cyano groups (–C≡N) distributing at both terminals of the carbon chain, providing two cross-linking points to interact with perovskites crystals via coordinating with uncoordinated Pb2+ and forming hydrogen bonds with –NH2 groups in perovskite. It was found that the addition of SN into perovskite precursor solution could effectively reduce defects, particularly inhibit the appearance of Pb0 and thus suppress trap-assisted nonradiative charge carrier recombination. As a result, the efficiency of CH_(3)NH_(3)PbI_(3)(Cl) (MAPbI_(3)(Cl))-based PSCs was improved from 18.4% to 20._(3)% with enhanced long-term stability at N2 and humid air atmosphere. This work provides a facile and effective strategy to enhance the PCE and stability of PSCs simultaneously, facilitating the commercialization of PSCs.

关键词： Perovskite solar cells Succinonitrile additive Cyano groups Defect engineering Suppressed charge recombination

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Virus-Host Interactions Drive Contrasting Bacterial Diel Dynamics in the Ocean

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Research 2024年第2期6卷 389-399页

作者： Xiaowei Chen Chen Hu wei wei Yunlan Yang Markus g.weinbauer Hongbo Li Shiying Ren Ruije Ma YVibin Huang Tingwei Luo Nianzhi Jiao Rui Zhang State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesFujian Key Laboratory of Marine Carbon SequestrationXiamen UniversityXiamen 361102PR China College of the Environment and Ecology Xiamen UniversityXiamen 361102PR China Research Center for Environmental Ecology and Engineering School of Environmental Ecology and Biological EngineeringWuhan Institute of TechnologyWuhan 430205PR China Sorbonne Universités UPMCUniversitéParis 06CNRSLaboratoire d'Oceanographie de Villefranche(LOV)Villefranche-sur-Mer 06230France National Marine Environmental Monitoring Center Ministry of Ecological EnvironmentDalian 116023PR China Department of Ocean Sciences University of CaliforniaSanta CruzCAUSA NOAA/OAR Pacific Marine Environmental Laboratory SeattleWAUSA Institute for Advanced Study Shenzhen UniversityShenzhen 518055PR China

Marine organisms perform a sea of diel *** diel dynamics have been shown to be driven by light,energy resources,circadian rhythms,and the coordinated coupling of photoautotrophs and heterotrophic ***,we explore the diel fluctuation of viral production and decay and their impact on the total and active bacterial community in the coastal and open seawaters of the South China *** results showed that the night-production diel pattern of lytic viral production was concurrent with the lower viral decay at night,contributing to the accumulation of the viral population size during the night for surface *** diel variations in bacterial activity,community composition,and diversity were found highly affected by viral *** was revealed by the finding that bacterial community diversity was positively correlated to lytic viral production in the euphotic zone of the open ocean but was negatively related to lysogenic viral production in the coastal *** distinct but contrasting correlations suggest that viral life strategies can not only contribute to diversifying bacterial community but also potentially piggyback their host to dominate bacterial community,suggesting the tightly synchronized depth-dependent and habitat-specific diel patterns of virus-host *** further implies that viruses serve as an ecologically important driver of bacterial diel dynamics across the ocean,highlighting the viral roles in bacterial ecological and biogeochemical processes in the ocean.

关键词： coastal ocean Marine

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Pancreatic intraductal papillary mucinous neoplasm in a patient with Lynch syndrome

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World Journal of gastroenterology 2015年第9期21卷 2820-2825页

作者： Meghan R Flanagan Arjun Jayaraj wei Xiong Matthew M Yeh Wendy H Raskind Venu g Pillarisetty Department of Surgery University of Washington Medical Center University of washington SeattleWA 98195United States Department of Pathology and Laboratory Medicine University of British ColumbiaVancouverBritish ColumbiaVancouverBC V6Z 1Y6Canada Department of Pathology University of Washington Medical Center Departments of Medicine/Medical genetics and Pyschiatry and Behavioral Sciences University of Washington Medical Center

Intraductal papillary mucinous neoplasm(IPMN) is a mucin-producing epithelial neoplasm that carries a risk of progression to invasive pancreatic ductal *** syndrome is an autosomal dominant condition caused by germline mutations in mismatch repair genes such as MSH2 that lead to microsatellite instability and increased risk of tumor *** families with Lynch syndrome have an increased risk of pancreatic cancer, a clear connection between Lynch syndrome and IPMN has not been *** present a report of a 58 year-old Caucasian woman with multiple cancers and a germline mutation of MSH2 consistent with Lynch syndrome.A screening abdominal computed tomography scan revealed a dilated main pancreatic duct and cystic ductular structure in the uncinate process that were consistent with IPMN of the main pancreatic duct on *** and polymerase chain reaction of the patient's pancreas specimen did not reveal microsatellite instability or mismatch repair gene loss of expression or *** findings may be explained by the fact that loss of mismatch repair function and microsatellite instability is a late event in neoplastic *** the relative rarity of main duct IPMN, its appearance in the setting of somatic MSH2 mutation suggests that IPMN may fit into the constellation of Lynch syndrome related malignancies.

关键词： Intraductal papillary mucinous neoplasm Pancreatic

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A Hydrogen Iron Flow Battery with High Current Density and Long Cyclability Enabled Through Circular water Management

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Energy & Environmental Materials 2023年第6期6卷 173-178页

作者： Litao Yan Yuyan Shao wei wa.g Pacific Northwest National Laboratory 902 Battelle BoulevardRichland WA 99354USA

The hydrogen-iron(HyFe)flow cell has great potential for long-duration energy storage by capitalizing on the advantages of both electrolyzers and flow ***,its operation at high current density(high power)and over continuous cycling testing has yet to be *** this article,we discuss our design and demonstration of a water-management strategy that supports high current and long-cycling performance of a HyFe flow *** molecules associated with the movement of protons from the iron electrode to the hydrogen electrode are sufficient to hydrate the membrane and electrode at a low current density of 100 mA cm^(-2)during the charge *** higher charge current density,more aggressive measures must be taken to counter back-diffusion driven by the acid concentration gradient between the iron and hydrogen *** water-management approach is based on water vapor feeding in the hydrogen electrode and water evaporation in the iron electrode,thus enabling high current density operation of 300 mA cm^(-2).

关键词： acid concentration gradient energy storage flow battery hydrogen longcycling performance water management

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Topological representations of crystalline compounds for the machine-learning prediction of materials properties

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npj Computational Materials 2021年第1期7卷 240-247页

作者： Yi Jiang Dong Chen Xin Chen Tangyi Li guo-wei wei Feng Pan School of Advanced Materials Peking UniversityShenzhen Graduate SchoolShenzhenPR China Department of Mathematics Michigan State UniversityEast LansingMIUSA

Accurate theoretical predictions of desired properties of materials play an important role in materials research and *** learning(ML)can accelerate the materials design by building a model from input *** complex datasets,such as those of crystalline compounds,a vital issue is how to construct low-dimensional representations for input crystal structures with chemical *** this work,we introduce an algebraic topology-based method,called atom-specific persistent homology(ASPH),as a unique representation of crystal *** ASPH can capture both pairwise and many-body interactions and reveal the topology-property relationship of a group of atoms at various *** with composition-based attributes,ASPH-based ML model provides a highly accurate prediction of the formation energy calculated by density functional theory(DFT).After training with more than 30,000 different structure types and compositions,our model achieves a mean absolute error of 61 meV/atom in cross-validation,which outperforms previous work such as Voronoi tessellations and Coulomb matrix method using the same ML algorithm and *** results indicate that the proposed topology-based method provides a powerful computational tool for predicting materials properties compared to previous works.

关键词： crystalline topology crystal

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四川龙泉山断裂带及其活动性与潜在地震危险性讨论

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西北地震学报 2012年第1期34卷 50-56页

作者：黄伟江娃利中国地震局地壳应力研究所北京100085

龙泉山构造带是四川盆地内川西强烈断陷区和川中稳定隆起区之间的一条区域性断裂。2008年汶川地震后该断裂带未来的强震潜势备受关注。本文对该断裂带的展布、晚第四纪活动性、深部构造形成机制以及断裂带未来的地震危险潜势进行了讨论... 详细信息

龙泉山构造带是四川盆地内川西强烈断陷区和川中稳定隆起区之间的一条区域性断裂。2008年汶川地震后该断裂带未来的强震潜势备受关注。本文对该断裂带的展布、晚第四纪活动性、深部构造形成机制以及断裂带未来的地震危险潜势进行了讨论。断裂带北段位于德阳东侧龙泉山脉西缘;龙泉山脉中段的山体两翼存在断裂;断裂带的南段以向西倾斜的断裂为主。这些断裂在晚更新世以来曾有活动,前人阶地调查显现该断裂带全新世存在活动。考虑到该断裂带未来的地震潜势评估,值得对该断裂带的活动性及断裂带深部构造和运动方式开展进一步的调查。

关键词：四川盆地龙泉山构造带晚第四纪活动前陆盆地前隆未来地震潜势

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高原地区甲型H1N1流感危重患者救治特点分析

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中国危重病急救医学 2010年第3期22卷 153-155页

作者：王毅鲁燕云郑俊达娃平措大达珍西藏自治区第二人民医院西藏自治区甲型H1N1流感重症监护病区拉萨850001

目的探讨高原地区甲型H1N1流感重症、危重症患者的救治特点。方法选择本院2009年10月10日至12月19日重症监护病房（ICU）收治的8例甲型H1N1流感患者，重症4例、危重症4例。经抗病毒、抗生素、激素、增强免疫功能、调节水和电解质平衡及... 详细信息

目的探讨高原地区甲型H1N1流感重症、危重症患者的救治特点。方法选择本院2009年10月10日至12月19日重症监护病房（ICU）收治的8例甲型H1N1流感患者，重症4例、危重症4例。经抗病毒、抗生素、激素、增强免疫功能、调节水和电解质平衡及对症支持、机械通气治疗后，分析高原地区甲型H1N1流感的治疗特点。结果8例患者均给予抗病毒药奥司他韦、抗生素莫西沙星加头孢曲松或头孢哌酮治疗；液体补充应掌握宁干勿湿的原则；3例重症和3例危重症患者给予氢化可的松，1例危重症患者给予甲泼尼龙；7例患者根据病情给予丙种球蛋白。4例患者行无创机械通气，给予双水平气道正压通气（BiPAP）或持续气道正压通气（CPAP），病情得到有效控制；1例危重症患者因病情需要行有创机械通气，初期行同步间歇指令通气（SIMV）＋压力控制通气（PCV）十高呼气末正压（PEEP）通气模式，后改为自主呼气模式＋压力支持通气（PSV）＋低PEEP行脱机前治疗，最终成功拔除气管插管脱离有创通气治疗。8例患者均治愈出院。结论对高原甲型H1N1流感重症、危重症患者应短期、足量、规范应用激素，及早给予无创机械通气治疗。

关键词：甲型H1N1流感危重症高原地区临床救治特点分析

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Refractive index insensitive temperature sensor based on waist-enlarged few mode fiber bitapers

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Optoelectronics Letters 2017年第1期13卷 25-28页

作者： LIU Qiang wa.g Si-wen FU Xing-hu FU guang-wei JIN wa BI wei-hong The Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province School of Information Science.and Engineering Yanshan University Qinhuangdao 066004 China

A refractive index insensitive temperature sensor based on waist-enlarged few mode fiber(FMF) bitapers is presented. The first section of FMF is spliced between two single-mode fibers. In fusion process,the waist-enlarged FMF bitapers can be obtained by large current discharging repeatedly. The refractive index and temperature sensing mechanisms are analyzed. For the sensors with different sizes,the refractive index and temperature experiments have been performed. The results show that in the refractive index ranges of 1.335 0—1.346 6 and 1.348 2—1.419 3,the refractive index insensitivity is verified. In a temperature range of 31.9—90 °C,the sensor sensitivity can be up to 85.57 pm/°C. In addition,it has a compact structure. Therefore,the sensor can avoid the cross sensitivity for measuring the refractive index and temperature simultaneously.

关键词： insensitive refractive verified waist sizes enlarged cladding details interferometer repeatedly

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graphitic carbon nitride with different dimensionalities for energy and environmental applications

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Nano Research 2020年第1期13卷 18-37页

作者： Qiang Hao guohua Jia wei wei Ajayan Vinu Yuan wa.g Hamidreza Arandiyan Bing-Jie Ni Centre for Technology in water and wastewater(CTWW) School of Civil and Environmental EngineeringUniversity of Technology Sydney(UTS)SydneyNSW2007Australia Curtin Institute of Functional Molecules and Interfaces School of Molecular and Life SciencesCurtin UniversityPerthWA6845Australia global Innovative Centre for Advanced Nanomaterials(gICAN) School of EngineeringFaculty of Engineering and Built EnvironmentThe University of NewcastleCallaghanNSW2308Australia School of Chemistry Faculty of ScienceThe University of New South WalesSydneyNSW2052Australia Laboratory of Advanced Catalysis for Sustainability School of ChemistryThe University of SydneySydneyNSW2006Australia

As a metal-free semiconductor,graphitic carbon nitride(g-C3N4)has received extensive attention due to its high stability,nontoxicity,facile and low-cost synthesis,appropriate band gap in the visible spectral range and wide availability of *** dimensions of g-C3N4 can influence the regime of the confinement of electrons,and consequently,g-C3N4 with various dimensionalities shows different properties,making them available for many stimulating *** there are some reviews focusing on the synthesis strategy and applications of g-C3N4,there is still a lack of comprehensive review that systemically summarises the synthesis and application of different dimensions of g-C3N4,which can provide an important theoretical and practical basis for the development of g-C3N4 with different dimensionalities and maximises their potential in diverse *** reviewing the latest progress of g-C3N4 studies,we aim to summarise the preparation of g-C3N4 with different dimensionalities using various structural engineering strategies,discuss the fundamental bottlenecks of currently existing methods and their solution strategies,and explore their applications in energy and environmental ***,it also puts forward the views on the future research direction of these unique materials.

关键词： graphitic carbon nitride micro-nano structure energy functional materials environmental functional materials photocatalyst

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基于粗糙集遗传神经网络的柴油机故障诊断

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控制工程 2009年第6期16卷 709-712页

作者：廖瑛张绍勇尹大伟尹嘉娃国防科学技术大学航天与材料工程学院湖南长沙410073 湘潭大学信息工程学院湖南湘潭411105

提出一种基于粗糙集和遗传算法的BP神经网络故障诊断方法,解决基本BP网络收敛速度慢、精度低、易陷入局部极小值问题。运用粗糙集理论对训练样本进行属性约简,简化BP网络输入维数。设计2次遗传算法训练BP网络,第一次优化神经网络隐含层... 详细信息

提出一种基于粗糙集和遗传算法的BP神经网络故障诊断方法,解决基本BP网络收敛速度慢、精度低、易陷入局部极小值问题。运用粗糙集理论对训练样本进行属性约简,简化BP网络输入维数。设计2次遗传算法训练BP网络,第一次优化神经网络隐含层节点个数,第二次在神经网络结构确定的情况下,优化网络连接权值。以柴油机进、排气阀故障为例,应用提出的方法进行仿真,仿真结果证明了该方法能够优化神经网络结构,提高故障诊断速度和准确率。

关键词：粗糙集神经网络遗传算法故障诊断柴油机

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