检索结果-南通市图书馆

Low-Temperature Fabrication of Stable Black-Phase CsPbI₃ Perovskite Flexible Photodetectors Toward Wearable Health Monitoring

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

NANO-MICRO LETTERS 2025年第1期17卷 1-14页

作者： Zhao, Yingjie Sun, Yicheng Pei, Chaoxin Yin, xing Li, Xinyi hao, Yi Zhang, Mengru Yuan, Meng Zhou, Jinglin Chen, Yu Song, Yanlin Zhengzhou Univ Coll Chem Zhengzhou 450001 Peoples R China Zhengzhou Univ Pingyuan Lab Zhengzhou 450001 Peoples R China Chinese Acad Sci Inst Chem Key Lab Green Printing Beijing 100190 Peoples R China Chinese Acad Sci Tech Inst Phys & Chem Key Lab Bioinspired Mat & Interfacial Sci Beijing 100190 Peoples R China Chinese Acad Sci Inst High Energy Phys Beijing 100049 Peoples R China

Low-temperature fabrication of black-phase CsPbI3 perovskite films is first demonstrated by using diphenylphosphinic chloride additive under 30-50 degrees C, arising from the steric effect and chloride insertion ***-area high-quality all-inorganic perovskite films with fewer defects enhanced crystallographic orientation, and excellent environmental stability is *** record performances are demonstrated for flexible wearable photodetectors with a responsivity of 42.1 A W-1, a detectivity of 1.3 x 1014 Jones, high-fidelity image, photoplethysmography sensor functions, and high mechanical stability. Flexible wearable optoelectronic devices fabricated from organic-inorganic hybrid perovskites significantly accelerate the development of portable energy, biomedicine, and sensing fields, but their poor thermal stability hinders further applications. Conversely, all-inorganic perovskites possess excellent thermal stability, but black-phase all-inorganic perovskite film usually requires high-temperature annealing steps, which increases energy consumption and is not conducive to the fabrication of flexible wearable devices. In this work, an unprecedented low-temperature fabrication of stable black-phase CsPbI3 perovskite films is demonstrated by the in situ hydrolysis reaction of diphenylphosphinic chloride additive. The released diphenyl phosphate and chloride ions during the hydrolysis reaction significantly lower the phase transition temperature and effectively passivate the defects in the perovskite films, yielding high-performance photodetectors with a responsivity of 42.1 A W-1 and a detectivity of 1.3 x 1014 Jones. Furthermore, high-fidelity image and photoplethysmography sensors are demonstrated based on the fabricated flexible wearable photodetectors. This work provides a new perspective for the low-temperature fabrication of large-area all-inorganic perovskite flexible optoelectronic devices.

关键词： In situ hydrolyzation Low-temperature processing All-inorganic perovskite Flexible photodetectors Health monitoring

Cooperative trajectory optimization of UAVs in approaching stage using feedback guidance methods

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2023年第6期24卷 361-381页

作者： hao-ran Shi Fa-xing Lu Ling Wu College of Weaponry Engineering Naval University of EngineeringWuhan430033China

This paper mainly studies the problem of using UAVs to provide accurate remote target indication for hypersonic *** on the optimal trajectory trends and feedback guidance methods,a new cooperative control algorithm is proposed to optimize trajectories of multi-UAVs for target tracking in approaching *** on UAV kinematics and sensor performance models,optimal trajectory trends of UAVs are analyzed ***,feedback guidance methods are proposed under the optimal observation trends of UAVs in the approaching target stage,producing trajectories with far less computational complexity and performance very close to the best-known ***,the sufficient condition for the UAV to form the optimal observation configuration by the feedback guidance method is presented,which guarantees that the proposed method can optimize the observation trajectory of the UAV in approaching ***,the feedback guidance method is numerically *** results demonstrate that the estimation performance of the feedback guidance method is superior to the Lyapunov guidance vector field(LGVF)method and verify the effectiveness of the proposed ***,compared with the receding horizon optimization(RHO)method,the proposed method has the same optimization ability as the RHO method and better real-time performance.

关键词： Unmanned aerial vehicles(UAVs) Target tracking Trajectory optimization Receding horizon optimization(RHO) Feedback guidance method

基于MATLABGUI的自动化转运装置可靠度预计计算

在线全文

学校读者我要写书评

暂无评论

环境技术 2024年第8期42卷 58-63页

作者：谢颖郝苒杏高志广刘德嘉核工业理化工程研究院天津300180

根据自动化转运装置的结构组成与机构功能,首先建立了自动化转运装置的可靠性模型;利用应力强度干涉理论法、经验公式法、厂家提供寿命法将自动化转运装置的零部件进行分类,获取各个零部件寿命值;根据自动化转运装置设计使用工况,计算... 详细信息

根据自动化转运装置的结构组成与机构功能,首先建立了自动化转运装置的可靠性模型;利用应力强度干涉理论法、经验公式法、厂家提供寿命法将自动化转运装置的零部件进行分类,获取各个零部件寿命值;根据自动化转运装置设计使用工况,计算出各个传动系及零部件工作量;假设自动化转运装置零部件的可靠性服从指数分布,进行可靠度预计。利用MATLAB GUI编制自动化转运装置各个零部件、各个传动系工作量及可靠度预计计算界面,方便自动化转运装置可靠度预计的迭代,减少反复迭代过程中人为操作带来的输入错误。最终得到自动化转运装置各个零部件、各个传动系及整体的可靠度预计计算结果,为找出自动化转运装置的薄弱环节及后续运行过程中需关注的问题提供了数据支撑。

关键词：可靠度预计指数分布 MATLAB GUI 自动化转运装置薄弱环节

Fabrication of corrosion inhibiting microcapsules functional coating and their high-efficiency corrosion resistance

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第2期43卷 842-848页

作者： hao-ran Yun Lu Lu Xue-Long hao xing-Xiang Zhang School of Material Science and Engineering Tiangong UniversityTianjin300387China National Center of Analysis and Testing for Nonferrous Metals and Electronic Materials General Research Institute for Nonferrous MetalsBeijing100088China Guobiao(Beijing)Testing&Certification Co. Ltd.Beijing101407China

Benzotriazole(BTA)was loaded into calcium carbonate microsphere shell by self-assembly method and a new type of high-efficiency corrosion inhibiting microcapsules(CIMs)were fabricated,which were added and dispersed into epoxy resin coating to obtain a new corrosion resistance functional *** corrosion inhibition effect of benzotriazole on aluminum alloy matrix was verified by polarization curve *** effectiveness of the CIMs and their loading capacity on inhibitor were evaluated by scanning electron microscope,laser confocal Raman spectroscopy together with thermogravimetric analysis.

关键词： corrosion coating resistance

An analytical model for water-oil two-phase flow in inorganic nanopores in shale oil reservoirs

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2021年第6期18卷 1776-1787页

作者： ran Li Zhangxin Chen Keliu Wu xing hao Jinze Xu Department of Chemical and Petroleum Engineering University of CalgaryCalgaryAlbertaT2N 1N4Canada State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China Illinois Institute of Technology ChicagoIL60616United States

The existence of water phase occupies oil flow area and impacts the confined oil flow behavior at the solid substrate in inorganic nanopores of shale oil reservoirs,resulting in a completely different flow pattern when compared with the single oil phase *** study proposes an analytical model to describe the water-oil two-phase *** this model,water slippage at the solid substrate is considered while oil slip is introduced to calculate the oil movement at the solid-oil boundary in dry *** is proven that the oil flow profiles of both the two-phase model and single-phase model show parabolic shapes,but the oil flow capacity drops when water takes up the flow space and the impact of water is more significant when the pore dimension is smaller than 30 ***,the oil flow velocity at a pore center is found to drop linearly given a larger water saturation in wet *** effects of surface wettability and oil properties on water-oil flow are also *** with the existing singlephase models,this model describes oil flow pattern in the wet condition with the incorporation of the influence of nanopore properties,which better predicts the oil transport in actual reservoir ***-oil relative permeability curves are also obtained to improve oil yield.

关键词： Shale oil Water films Two-phase flow Nanopore

Exploring the potential of extrachromosomal DNA as a novel oncogenic driver

在线全文

学校读者我要写书评

暂无评论

Science China Life Sciences 2025年第1期 144-157页

作者： Huanbo Zhu Longtao Huangfu Junbing Chen Jiafu Ji Xiaofang xing Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing) Division of Gastrointestinal Cancer Translational Research LaboratoryPeking University Cancer Hospital & Institute Department of Gastrointestinal Cancer Center Peking University Cancer Hospital & Institute Department of Liver Surgery & Transplantation Liver Cancer InstituteZhongshan HospitalFudan University Key Laboratory of Carcinogenesis and Cancer Invasion Ministry of Education State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers Beijing Key Laboratory of Carcinogenesis and Translational ResearchDivision of Gastrointestinal Cancer Translational Research LaboratoryPeking University Cancer Hospital & Institute

Extrachromosomal DNA(ecDNA) is a form of circular DNA mostly found in tumor cells. Unlike the typical chromosomal DNA, ecDNA is circular, self-replicating, and carries complete or partial gene fragments. Although ecDNA occurrence remains a rare event in cancer, recent studies have shown that oncogene amplification on ecDNA is widespread throughout many types of cancer, implying that ecDNA plays a central role in accelerating tumor evolution. ecDNA has also been associated with increased tumor mutation burden, chromosomal instability, and even tumor microenvironment remodeling. ecDNA may be crucial in influencing tumor heterogeneity, drug sensitivity,oncogenic senescence, and tumor immunogenicity, leading to a worsening prognosis for tumor patients. In this way, several clinical trials have been conducted to investigate the importance of ecDNA in clinical treatment. In this review, we summarize the biogenesis, characteristics, and current research methods of ecDNA, discuss the vital role of ecDNA-caused tumor heterogeneity in cancers, and highlight the potential role of ecDNA in cancer therapy.

关键词：

同方期刊数据库

Plasma preparation of highly reactive Ag-Cu NPs anchored in N-PC as catalysts for Aluminum-air battery

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第11期86卷 217-226,I0005页

作者： Jie Wang Aimin Wu Lei xing Shuai ran Wenhua Yu Xufeng Dong hao Huang Key Laboratory of Energy Materials and Devices(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024LiaoningChina

Efficient,stable and economical catalysts play a crucial role in enhancing the kinetics of slow oxygen reduction reactions(ORR)in Aluminum-air *** the potential next-generation candidates,Ag catalysts are promising due to their high activity and low cost,but weaker oxygen adsorption has hindered *** address this bottleneck,Ag-alloying has emerged as a principal *** this work,we successfully prepared Ag-Cu nanoparticles(NPs)with a rich eutectic phase and uniform dispersion structure using plasma *** increased solid solution of Ag and Cu led to changes in the electronic structure,resulting in an upward shift of the d-band center,which significantly improved oxygen *** combination of Ag and Cu in the NPs synergistically enhanced the adsorption of Ag and the desorption of *** functional theory(DFT)calculations revealed that Ag-Cu25 NPs exhibited the smallest limiting reaction barrier,leading to increased ORR *** further optimize the catalyst’s performance,we utilized N-doped porous nanocarbon(N-PC)with high electrical conductivity and abundant mesoporous channels as the support for the Ag-Cu *** N-PC support provided optimal mass transfer carriers for the highly active Ag-Cu25 *** a result,the Ag-Cu25/NPC catalyst displayed excellent ORR activity in alkaline media,with a half-wave potential(E_(1/2))of 0.82 ***,the Al-air battery incorporating the Ag-Cu25/NPC catalyst exhibited outstanding electrochemical *** demonstrated high open-circuit voltages of 1.89 V and remarkable power densities of 193 m W cm^(-2).The battery also sustained a high current output and maintained a stable high voltage for 120 hours under mechanical charging,showcasing its significant potential for practical applications.

关键词： Aluminum-air battery Catalyst Ag-Cu nanoparticles Eutectic Nitrogen-doped Oxygen reduction reaction

Application of transparent casting moulds prepared by additive manufacturing technology in hydraulic simulation

在线全文

学校读者我要写书评

暂无评论

China Foundry 2022年第4期19卷 299-306页

作者： Qian Feng xing ran Ke-hui Hu hao-yuan Wang Zhi-gang Lü State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China AVIC Heavy Machinery Co. Ltd.Guiyang 550005China Key Laboratory of Advanced Materials Processing Technology Ministry of EducationTsinghua UniversityBeijing 100084China

Hydraulic simulation is one of the critical methods to research the filling mechanism of molten metal in the casting ***,it only performs on test pieces with relatively simple structures due to the limitation of the preparation *** this study,the method of photocuring additive manufacturing was used to prepare the complex casting mould from transparent photosensitive *** pouring test was carried out under different centrifugal conditions,and the filling process of the gating system,support bars and other positions in the vertical direction was recorded and *** experimental results show that the internal liquid level and the filling process of the test piece prepared by this method can be observed *** angle between the liquid surface and the horizontal plane in the test piece gradually increases as the centrifugal rotational speed increases,which means the filling process is carried out from outside to inside at high rotational *** velocity of the fluid entering the runner increases with the increase of rotational speed,but the filling speeds is less affected by the centrifugal speed at other *** liquid flow is continuous and stable during the forward filling process,without splashing or interruption of liquid droplets.

关键词： additive manufacturing centrifugal casting investment casting hydraulic simulation transparent mould

Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital Hybridization

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 281-292页

作者： xing Wang Wei Pi Sheng Hu Haifeng Bao Na Yao Wei Luo State Key Laboratory of New Textile Materials and Advanced Processing Technology Key Laboratory of New Textile Materials and Applications of Hubei ProvinceSchool of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China

Anion-exchange membrane water electrolyzers(AEMWEs)for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based *** introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units,the d-orbital and electronic structures can be adjusted,which is an important strategy to achieve sufficient oxygen evolution reaction(OER)performance in ***,the ternary NiFeM(M:La,Mo)catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this *** and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen,resulting in enhanced adsorption strength of oxygen intermediates,and reduced rate-determining step energy barrier,which is responsible for the enhanced OER *** critically,the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm^(−2) in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.

关键词： NiFe-based catalysts d-orbital coupling Oxygen evolution reaction Anion exchange membrane electrolyzer