检索结果-内蒙古大学图书馆

arXiv 2024年

作者： Liu, Xinzijian Han, Yanbo Li, Zhuoyuan Fan, Jiahao Zhang, Chengqian Zeng, Jinzhe Shan, Yifan Yuan, Yannan Xu, Wei-Hong Liu, Yun-Pei Zhang, Yuzhi Wen, Tongqi York, Darrin M. Zhong, Zhicheng Zheng, Hang Cheng, Jun Zhang, Linfeng Wang, Han DP Technology Beijing100080 China Institute of Molecular Science and Applied Chemistry School of Chemistry Xi'an Jiaotong University Xi'An710049 China Department of Mechanical Engineering The University of Hong Kong Hong Kong School of Physics Peking University Beijing100871 China AI for Science Institute Beijing100080 China HEDPS CAPT College of Engineering Peking University Beijing100871 China Laboratory for Biomolecular Simulation Research Center for Integrative Proteomics Research Department of Chemistry and Chemical Biology Rutgers University PiscatawayNJ08854-8087 United States Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China IKKEM Xiamen361005 China State Key Laboratory of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy Materials College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China Department of Physics University of Science and Technology of China Hefei230026 China Suzhou Institute for Advanced Research University of Science and Technology of China Suzhou215123 China Institute of Artificial Intelligence Xiamen University Xiamen361005 China Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics Beijing100094 China

In the AI-for-science era, scientific computing scenarios such as concurrent learning and high-throughput computing demand a new generation of infrastructure that supports scalable computing resources and automated workflow management on both cloud and high-performance supercomputers. Here we introduce Dflow, an open-source Python toolkit designed for scientists to construct workflows with simple programming interfaces. It enables complex process control and task scheduling across a distributed, heterogeneous infrastructure, leveraging containers and Kubernetes for flexibility. Dflow is highly observable and can scale to thousands of concurrent nodes per workflow, enhancing the efficiency of complex scientific computing tasks. The basic unit in Dflow, known as an Operation (OP), is reusable and independent of the underlying infrastructure or context. Dozens of workflow projects have been developed based on Dflow, spanning a wide range of projects. We anticipate that the reusability of Dflow and its components will encourage more scientists to publish their workflows and OP components. These components, in turn, can be adapted and reused in various contexts, fostering greater collaboration and innovation in the scientific community. Copyright © 2024, The Authors. All rights reserved.

关键词： Reusability

来源：评论

学校读者我要写书评

暂无评论

Generating multiple-folding-geometry freeform reflective imaging systems based on optical design model-informed neural network

引用

Optics & Laser technology 2025年 191卷

作者： Guogen Chen Tong Yang Dewen Cheng Yongtian Wang Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and Photonics Beijing Institute of Technology Beijing 100081 China National Key Laboratory on Near-surface Detection Beijing 100072 China Beijing Ned+AR Ltd. Beijing 100081 China

Freeform systems play important roles in modern optical systems, but their design remains challenging due to the complexity of freeform surfaces and lack of efficient methods as well as reference designs. This paper presents a framework that leverages an optical design model-informed neural network (ODMINN) to automatically generate multiple-folding-geometry freeform reflective imaging systems. The network is trained by both the data-driven loss and the physics-informed loss. An automatic training dataset generation method, combined with a fast light-obstruction evaluation method based on equivalent spherical systems, is proposed for obtaining dataset containing systems with various parameters and folding geometries. The real optical design model is integrated into the training process, by directly calculating the physics-informed loss related to imaging performance and optical design constraints using differential ray tracing. Freeform systems can be generated immediately by the network based on the design requirements. Compared with previous network which can only generate systems with one specific folding geometry, multiple-folding-geometry freeform systems can be generated using the proposed framework. We demonstrate the framework by designing freeform off-axis three-mirror systems with all eight different folding geometries. Our approach can significantly reduce human involvement and dependency on existing reference systems in the design of freeform optics, while dramatically improving the design efficiency.

关键词： Freeform optics Imaging system Multiple-folding-geometry Neural network Optical design model System generation

来源：评论

学校读者我要写书评

暂无评论

Preparation of high-entropy alloy diffusion barrier and its effect on high-temperature interdiffusion of NiAlHf/Ni-based single crystal superalloy

Preparation of high-entropy alloy diffusion barrier and its ...

引用

第四届粤港澳大湾区真空科技创新发展论坛暨2020年广东省真空学会学术年会

作者：许中湛 Peng-Zhang Qian Shi Wei Wang Hong-Zhi Yang Song-Sheng Lin Institute of Advanced Wear & Corrosion Resistant and Functional Materials Ji Nan University The Key Lab of Guangdong for Modern Surface Engineering Technology National Engineering Laboratory for Modern Materials Surface Engineering TechnologyInstitute of New MaterialsGuangdong Academy of Sciences

It was a promising and cost-effective way for development of high-entropy alloy(HEA) film to incorporate these materials of superior properties in harsh *** this work,the CoAlCrNiMo(HEA)film and NiAlHf were produced onto nickel-based single crystal superalloy(N5) using DC-magnetron sputtering and arc ion plating,*** interdiffusion behavior and high temperature oxidation resistance of NiAlHf and NiAlHf/CoAlCrNiMo coating were investigated via isothermal oxidation at 1100 ℃.A～30 μm thick layer,mainly composed of needle-like topologically close-packed phases(TCP) in secondary reaction zone(SRZ),was formed in the NiAlHf coated superalloy for 100 *** the precipitates of TCP and SRZ were not discovered in the NiAlHf/CoAlCrNiMo coated *** results reveal that HEA film with lattice distortion,sluggish diffusion,was effectively constraining inward diffusion of Al from the coating and outward diffusion of refractory elements,such as W,Mo,Re,*** high temperature of 1100℃,the oxidation kinetics curve of NiAlHf/CoAlCrNiMo coating was close to parabolic law compared to NiAlHf coting,indicating the oxidation resistance property was excellent under these severe *** roles of HEA film in affecting interdiffusion process were also discussed.

关键词： high-entropy alloy NiAlHfo coating interdiffusion behavior xidation resistance

来源：评论

学校读者我要写书评

暂无评论

Phase shift and magnetic anisotropy induced field splitting of impurity states in (Li1-xFex)OHFeSe superconductor

arXiv

引用

arXiv 2023年

作者： Zhang, Tianzhen Hu, Yining Su, Wei Chen, Chen Wang, Xu Li, Dong Lu, Zouyouwei Yang, Wentao Zhang, Qingle Dong, Xiaoli Wang, Rui Wang, Xiaoqun Feng, Donglai Zhang, Tong Department of Physics State Key Laboratory of Surface Physics and Advanced Material Laboratory Fudan University Shanghai200438 China Beijing Computational Science Research Center Beijing100084 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China National Laboratory of Solid State Microstructures Department of Physics Nanjing University Nanjing210093 China School of Physics Zhejiang University Zhejiang Hangzhou310058 China National Synchrotron Radiation Laboratory Department of Physics University of Science and Technology of China Hefei230026 China College of Physics and Electronic Engineering Center for Computational Sciences Sichuan Normal University Chengdu610068 China Collaborative Innovation Center for Advanced Microstructures Nanjing210093 China Shanghai Research Center for Quantum Sciences Shanghai201315 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100049 China Songshan Lake Materials Laboratory Guangdong Dongguan523808 China

Revealing the energy and spatial characteristics of impurity induced states in superconductors is essential for understanding their mechanism and fabricating new quantum state by manipulating impurities. Here by using high-resolution scanning tunneling microscopy/spectroscopy, we investigated the spatial distribution and magnetic field response of the impurity states in (Li1-xFex)OHFeSe. We detected two pairs of strong in-gap states on the "dumbbell" shaped defects. They display clear damped oscillations with different phase shifts and a direct phase - energy correlation. These features have long been predicted for classical Yu-Shiba-Rusinov (YSR) state, which are demonstrated here with unprecedented resolution for the first time. Moreover, upon applying magnetic field, all the in-gap state peaks remarkably split into two rather than shift, and the splitting strength is field orientation dependent. Via detailed numerical model calculations, we found such anisotropic splitting behavior can be naturally induced by a high-spin impurity coupled to anisotropic environment, highlighting how magnetic anisotropy affects the behavior of YSR states. © 2023, CC BY.

关键词： Magnetic anisotropy

来源：评论

学校读者我要写书评

暂无评论

Dynamic Passivation of Perovskite Films via Gradual Additive Release for Enhanced Solar Cell Efficiency

引用

Angewandte Chemie 2024年第11期137卷

作者： Yujie Zhu Jing Zhang Hang Su Peijun Wang Yutong She Xinxin Zheng Xin Liu Jiarong Wu Runkang Wang Ying Wang Deng Li Shengzhong Frank Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China School of Science Xi'an University of Posts & Telecommunications Xi'an 710121 China Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China

Modifying perovskites with functional additives has proven effective in refining the crystallization process and passivating the defects of perovskite films, thereby ensuring high photovoltaic efficiencies. However, conventional methods that involve pre-mixing additives into the precursor solution often face challenges due to discrepancies in the spatial distribution of slow-diffused additives relative to dynamically formed defect sites, resulting in limited passivation effectiveness. To address this issue, this study innovatively proposes a dynamic passivation strategy that utilizes a pre-passivator to gradually release active additives during the thermal crystallization process of perovskite films. By leveraging the principle of energy minimization, these timely-released additives can interact precisely and selectively with the high-energy defect sites generated during crystallization, thus facilitating efficient additive utilization and in situ real-time defect passivation. Through analysis of crystallization kinetics and carrier dynamic, it is demonstrated that this dynamic passivation approach significantly improves film quality and prolongs carrier lifetime, outperforming traditional pre-mixing tactics. Consequently, the final perovskite solar cell achieves an impressive solar conversion efficiency of 25.33 %, along with exceptional stability. This work provides strong support of tailored additive strategies aimed at further enhancing the efficiency of perovskite solar cells and their subsequent commercial applications.

关键词： perovskites dynamic passivation pre-passivator defects crystallization

来源：评论

学校读者我要写书评

暂无评论

Large and Dense Organic-Inorganic Hybrid Perovskite CH3NH3PbI3 Wafer Fabricated by One-Step Reactive Direct Wafer Production with High X-ray Sensitivity

引用

ACS applied materials & interfaces 2020年第14期12卷 16592-16600页

作者： Mingxin Hu Shanshan Jia Yucheng Liu Jian Cui Yunxia Zhang Han Su Shuqing Cao Lihong Mo Depeng Chu Guangtao Zhao Kui Zhao Zhou Yang Shengzhong Frank Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Advanced Energy Materials and School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China. Dalian National Laboratory for Clean Energy and Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China.

Lead halide perovskites with good optoelectronic properties and high attenuation of high-energy radiation are great candidates for X-ray radiation detectors. Large area, dense, and thick films or wafers are a prerequisite for these applications. In this paper, a one-step heat-assisted high-pressure press method is developed to directly prepare a large (the largest has a diameter of 80 mm) and thickness- and shape-controlled phase-pure organic-inorganic hybrid CHNHPbI wafer of densely packed large microcrystals from raw powder materials. Meanwhile, this method uses no solvent to achieve essentially 100% material utilization. The obtained wafers show good ambipolar carrier mobilities of ∼20 cm V s and a product as high as 3.84 × 10 cm V. Under an X-ray source using an acceleration voltage of 40 kV, the perovskite wafer-based X-ray detector shows an X-ray sensitivity as large as 1.22 × 10 μC Gy cm under a 10 V bias, the highest reported for any perovskite material. The method provides a convenient strategy for producing large perovskite wafers with good optoelectronic properties, which will facilitate the development of large perovskite devices.

关键词： X-ray detector large size wafer optoelectronic properties perovskite sensitivity

来源：评论

学校读者我要写书评

暂无评论

Highest overall conversion efficiency for portable thin-film zinc-ion batteries photorecharged by flexible perovskite solar cells

引用

Chemical engineering Journal 2025年 518卷

作者： Ming Chen Xin Guo Bita Farhadi Xiaojun Guo Yan Zhu Chao Zhou Xudong Li Kai Wang Dong Yang Xiao Jiang Haoxiang Zhang Shengzhong Liu School of Electric Power Civil Engineering and Architecture College of Physics and Electronics Engineering State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi University Taiyuan 030006 China State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China EIT Data Science and Communication College Zhejiang Yuexiu University Shaoxing China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China CNNP Optoelectronics Technology 2828 Canghai Road Lingang Shanghai China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal China

The interconnection of flexible thin-film zinc-ion batteries (FTZIBs) and flexible perovskite solar cells presents an ideal system for portable photorechargeable power generation-storage system. However, the integration process of these two components still faces significant challenges. In this work, we develop a novel approach to enhance the integration compatibility between FTZIBs and flexible perovskite solar cells. Specifically, FTZIBs and flexible perovskite solar cells are fabricated on opposite sides of a polyimide (PI) substrate, aiming to improve the portability and compactness of the FTZIBs. By using Ag-Cu thin-film as the current collectors for the FTZIBs, not only suppress galvanic corrosion between the current collector and Zn but also ensure that the Ag-Cu-Zn thin-film electrode satisfies the Born-Huang stability criterion, significantly improved the electrochemical cycling stability and mechanical robustness of the thin-film electrodes. Additionally, a functional organohydrogel electrolyte with excellent mechanical strength, adhesion, and water retention is synthesized to suppress Zn dendrite formation and side reactions such as hydrogen evolution, enhancing the cycling stability and bendability of the FTZIBs. The resultant portable photorechargeable zinc-ion batteries (PZIBs) exhibit a high specific capacity of 250 mAh cm −3 and an overall conversion efficiency of 18.44 %, representing the best performance among similar systems.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Anti-solvent engineering for efficient semitransparent CH3NH3PbBr3 perovskite solar cells for greenhouse applications

引用

Journal of Energy Chemistry 2019年第7期28卷 12-19页

作者： Waqas Siddique Subhani Kai Wang Minyong Du Xiuli Wang Ningyi Yuan Jianning Ding Shengzhong(Frank)Liu Dalian National Laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of the Chinese Academy of Sciences Beijing 100039China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710119ShaanxiChina Jiangsu Key Laboratory for Photovoltaic Engineering and Science Changzhou UniversityChangzhou 213164.Jiangsu.China

With ideal combination of benefits that selectively converts high photon energy spectrum into electricity while transmitting low energy photo ns for photos yn thesis,the CH3NH3PbBr3 perovskite solar cell(BPSC)is a promising candidate for efficient greenhouse based building integrated photovoltaic(BIPV)***,the efficiency of BPSCs is still much lower than their theoretical *** general,interface band alignment is regarded as the vital factor of the BPSCs whereas only few reports on enhancing perovskite film *** this work,highly efficient BPSCs were fabricated by improving the crystallization process of CH3NH3PbBr3 with the assistance of anti-solvents.A new anti-solvent of diphenyl ether(DPE)was developed for its strong interaction with the solvents in the perovskite precursor *** using the anti-solvent of DPE,trap-state density of the CH3NH3PbBr3 film is reduced and the electron lifetime is enhanced along with the large-grain crystals compared with the samples from conventional anti-solvent of *** preliminary optimization,the efficiencies of typical and semitransparent BPSCs are improved to as high as 9.54%and 7.51%,*** absorption measurement demonstrates that the cell without metal electrode shows 80%transparency in the wavelength range of 550-1000 nm that is perfect for greenhouse *** that the cell absorbs light in the blue spectrum before 550 nm,it offers very high solar cell efficiency with only 17.8%of total photons,while over 60%of total photons can transm让through for photosynthesis if a transparent electrode can be obtained such as indium doped SnO2.

关键词： CH3NH3PbBr3 Semitransparent perovskite solar cell Anti-solvent Greenhouse

来源：评论

学校读者我要写书评

暂无评论

Enhancing Performance of Electrical Discharge Machining by Ultrafine-Grained Cu-0.5%Cr Electrode

SSRN

引用

SSRN 2022年

作者： Chu, Zhu Qi Wei, Kun Xia Wei, Wei Alexandrov, Igor V. An, Xu Long Wang, Dan Dan Liu, Xiang Kui School of Materials Science and Engineering Changzhou University 1 Gehu Road Changzhou213164 China School of Electronic Engineering and Intelligent Manufacturing Anqing Normal University 1314 Jixian North Road Anqing246011 China Jiangsu Key Laboratory of Materials Surface Science and Technology Advanced Functional Materials of Jiangsu Joint Laboratory for International Cooperation Changzhou University Changzhou213164 China Department of Materials Science and Physics of Metals Ufa State Aviation Technical University 12 K. Marx St. Ufa450008 Russia

Electrode is an important component that affects the performance of electrical discharge machining (EDM), It plays an important role in machining efficiency, surface quality and geometric accuracy. In this work, a new method of preparing Cu-0.5%Cr electrode by equal channel angular pressing (ECAP), deep cryogenic treatment (DCT) and aging treatment (AT) is proposed. The ultrafine-grained Cu-0.5%Cr electrode has high strength and high electrical conductivity through this process, so as to improve the machining characteristics in EDM. The surface roughness (Ra), the workpiece corner sharpness (WCS), and the electrode wear rate (EWR) were investigated. The results show that the electrode treated with 4 passes of ECAP + DCT (12h) + AT (550℃×1h) can reduce the EWR and WCS by 63.6% and 49.7%, respectively. This is due to the electrical conductivity and microhardness of Cu-0.5%Cr electrode are significantly improved through ECAP+DCT+AT. At the same time, the research shows that the treatment of the Cu-0.5%Cr electrode with 4 passes of ECAP + DCT (12h) + AT (550℃×1h) can result in the excellent machined surface quality (Ra is reduced by 53.5%) which is confirmed by the results of the scanning electron microscopy (SEM) method. Ultrafine-grained Cu-0.5%Cr electrode with an excellent combination of strength and good electrical conductivity has an outstanding processing performance. © 2022, The Authors. All rights reserved.

关键词： surface properties

来源：评论

学校读者我要写书评

暂无评论

Multi-Functional Plant Flavonoids Regulate Pathological Microenvironments for Vascular Stent surface engineering

SSRN

引用

SSRN 2022年

作者： Liu, Luying Lan, Xiaorong Chen, Xiao Dai, Sheng Wang, Zhixing Zhao, Ansha Lu, Lei Huang, Nan Chen, Jiang Yang, Ping Liao, Yuzhen Institute of Biomaterials and Surface Engineering Key Lab. for Advanced Technologies of Materials Ministry of Education Southwest Jiaotong University Chengdu610031 China Luzhou Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration The Affiliated Stomatological Hospital of Southwest Medical University Luzhou646000 China Sichuan Key Laboratory for Disease Gene Study Sichuan Academy of Medical Sciences Sichuan Provincial People’s Hospital University of Electronic Science and Technology of China No. 32 of the West Second Section of First Ring Road Chengdu610031 China School and Hospital of Stomatology Wenzhou Medical University Wenzhou325027 China

In-stent restenosis (ISR) and late thrombosis, usually caused by excessive smooth muscle cell (SMC) proliferation and delayed endothelial layer repair, respectively, are the main risks for the failure of vascular stent implantation. For years, modification of stents with biomolecules that could selectively inhibit SMC proliferation and support endothelial cell (EC) growth had drawn extensive attention. However, the modulatory effect of these biomolecules faces the impact of oxidative stress, inflammation, and hyperlipidemia of the pathological vascular microenvironment, which is caused by the stent implantation injury and atherosclerosis lesions. Here, we modified stents with a natural and multi-functional flavonoid, baicalin (BCL), using poly-dopamine (PDA) coating technology to combat the harmful impact of the pathological microenvironment. Stent with an appropriate BCL immobilization density (approximately 2.03 μg/cm2) successfully supported ECs growth while inhibited SMC proliferation. Furthermore, baicalin-modified surfaces regulated the oxidative stress, inflammation, and high-lipid of the pathological microenvironment to inhibit endothelial dysfunction and the oxidized low-density lipoprotein (ox-LDL)-induced macrophage foam cells formation. In vivo results showed that baicalin-modified stents exhibited significant anti-ISR, anti-inflammatory, and endothelialization-promoting functions. Our study suggests that the multi-functional baicalin with pathological microenvironment-regulation(PMR) effect has potential use in the surface engineering of cardiovascular devices. © 2022, The Authors. All rights reserved.

关键词： Flavonoids

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：