检索结果-南通市图书馆

Research advances on blockchain-as-a-service:architectures,applications and challenges

在线全文

学校读者我要写书评

暂无评论

Digital Communications and Networks 2022年第4期8卷 466-475页

作者： jie Song Pengyi Zhang Mohammed Alkubati Yubin Bao ge Yu Software College Northeastern University Shenyang110819China School of Computer Science and Engineering Northeastern UniversityShenyang110819China

Due to the complexity of blockchain technology,it usually costs too much effort to build,maintain and monitor a blockchain system that supports a targeted *** this end,the emerging“Blockchain as a Service”(BaaS)makes the blockchain and distributed ledgers more accessible,particularly for businesses,by reducing costs and *** combines the high computing power of cloud computing,the pervasiveness of IoT and the decentralization of blockchain,allowing people to build their own applications while ensuring the transparency and openness of the *** paper surveys the research outputs of both academia and ***,it introduces the representative architectures of BaaS systems and then summarizes the research contributions of BaaS from the technologies for service provision,roles,container and virtualization,interfaces,customization and *** typical applications of BaaS in both academic and practical domains are also *** present,the research on the blockchain is abundant,but research on BaaS is still in its *** challenges of BaaS are concluded in this paper for further study directions.

关键词： Blockchain as a service Blockchain Service Internet of things Cloud computing

Stability Analysis and Enhanced Virtual Synchronous Control for Brushless Doubly-fed Induction generator Based Wind Turbines

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2024年第5期12卷 1445-1458页

作者： Hailiang Xu chao Wang Zhongxing Wang Pingjuan ge Rende Zhao China University of Petroleum(East China) Qingdao 266580China

The brushless doubly-fed induction generator(BDFIG)presents significant potential for application in wind power systems,primarily due to the elimination of slip rings and *** application of virtual synchronous control(VSynC)has been demonstrated to effectively augment the inertia of BDFIG ***,the dynamic characteristics and stability of BDFIG under weak grid conditions remain largely *** critical stabilizing factors for BDFIG-based wind turbines(WTs)are methodically investigated,and an enhanced VSynC method based on linear active disturbance rejection control(LADRC)is *** stability analysis reveals that the proposed method can virtually enhance the stability of the grid-connected system under weak grid *** accuracy of the theoretical analysis and the effectiveness of the proposed method are affirmed through extensive simulations and detailed experiments.

关键词： Brushless doubly-fed induction generator(BDFIG) virtual synchronous control(VSynC) stability analysis linear active disturbance rejection control(LADRC)

Automatic interval management for aircraft based on dynamic fuzzy speed control considering uncertainty

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2023年第11期36卷 354-372页

作者： jie YUAN Yang PEI Yan XU Xiaochen LI Yuxue ge School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China School of Aerospace Transport and ManufacturingCranfield UniversityCranfield MK430ALUnited Kingdom

A novel real-time autonomous Interval Management System(IMS)is proposed to automate interval management,which considers the effect of wind uncertainty using the Dynamic Fuzzy Velocity Decision(DFVD)*** membership function can be generated dynamically based on the True Air Speed(TAS)limitation changes in real time and the interval criterion of the adjacent aircraft,and combined with human cognition to formulate fuzzy rules for speed adjusting *** groups of experiments were conducted during the en-route descent stage to validate the proposed IMS and DFVD performances,and to analyze the impact factors of the *** verification experimental results show that compared with actual flight status data under controllers’command,the IMS reduces the descent time by approaching 30%with favorable wind uncertainty suppression *** analysis shows that the ability improvement of DFVD is mainly affected by the boundary value of the membership ***,the dynamic generation of the velocity membership function has greater advantages than the static method in terms of safety and *** the analysis of influencing factors,we found that the interval criterion and aircraft category have no significant effect on the capability of *** a higher initial altitude scenario,the initial interval should be appropriately increased to enhance safety and efficiency during the descent *** prototype system could evolve into a realtime Flight-deck Interval Management(FIM)tool in the future.

关键词： Air traffic control Air transportation Fuzzy logic Safety interval Wind uncertainty

Buried interface bridging for inverted cesium-formamidinium triiodide perovskite solar cells with long operational stability

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第01期 163-173页

作者： Chenhui Zhang Chunjun Liang Fulin Sun Ting Zhu Xinghai Huang Yuzhu Guo Xinyu Guo Kunyang ge Dan Li Fangtian You Zhiqun He Key Laboratory of Luminescence and Optical Information Ministry of Education Institute of Optoelectronic TechnologyBeijing Jiaotong University Department of Physics School of Physical Science and Engineering Beijing Jiaotong University

In the field of perovskite solar cells(PSCs), the research on defects in the buried interface has been relatively limited due to its non-exposure; however, this interface significantly impacts the performance enhancement of inverted PSCs. This study employs phenylethylammonium chloride(PEACl) molecules as a buffer layer to modify the buried interface of p-i-n structured PSCs,aiming to enhance the uniformity of self-assembled monolayers(SAMs) and facilitate the uniform nucleation and growth of perovskite films on the substrate. Furthermore, the introduction of the PEACl buffer layer effectively passivates defects at the bottom of the perovskite layer and notably enhances the crystal quality of the perovskite film by mitigating residual stress,thereby reducing nonradiative recombination loss. Following these optimizations, the MA-free PSCs treated with PEACl achieve a power conversion efficiency(PCE) of 24.11%, with significant improvements in storage, thermal stability, and operational stability. Particularly noteworthy is the device's performance in an unencapsulated state, whereas after 1,500 hours of continuous light operation stability testing, it retains 97% of its original efficiency. This study not only enriches the systematic understanding of the characteristics of the buried interface in PSCs but also contributes significantly to advancing the commercial production of perovskite photovoltaic technology.

关键词：

同方期刊数据库

ge-semigroup method for controllability of stochastic descriptor linear systems

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2023年第3期66卷 299-300页

作者： Zhaoqiang ge School of Mathematics and Statistics Xi’an Jiaotong University

Dear editor, Nowadays, there are more and more researches on stochastic descriptor systems(see [1–7]). For example, Refs. [4,5] studied the exact controllability of a class of stochastic descriptor systems by a strongly continuous semigroup in Hilbert spaces. In this study, the exact controllability and approximate controllability of the following stochastic descriptor system are studied by using the ge-semigroup theory, respectively:

关键词：

Highly π-extended copolymer as additive-free hole- transport material for perovskite solar cells

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2018年第1期11卷 185-194页

作者： jie Liu Qianqing ge Weifeng Zhang Jingyuan Ma jie Ding Gui Yu Jinsong Hu Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CASResearch/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing100190 China University of Chinese Academy of Sciences Beijing 100049 China

Organolead halide perovskite solar ceils have achieved a certified power- conversion efficiency （PCE） of 22.1% and are thus among the most promising candidates for next-generation photovoltaic devices. To date, most high-efficiency perovskite solar cells have employed arylamine-based hole-transport materials （HTMs）, which are expensive and have a low mobility. The complicated doping procedures and the potentially stability-adverse dopants used in these HTMs are among the major bottlenecks for the commercialization of perovskite solar cells （PSCs）. Herein, we present a polythiophene-based copolymer （PDVT-10） with a hole mobility up to 8.2 cm2-V-l.s-1 and a highest occupied molecular orbital level of -5.28 eV as a hole-transport layer （HTL） for a PSC. A device based on this new HTM exhibited a high PCE of 13.4% under 100 mW-cm-2 illumination, which is one of the highest PCEs reported for the dopant-free polymer-based HTLs. Moreover, PDVT-10 exhibited good solution processability, decent air stability, and thermal stability, making it a promising candidate as an HTM for PSCs.

关键词： perovskite solar cell hole-transport layer dopant-free PDVT-IO stability

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

Foreword

Science China Mathematics 2023年第12期66卷 2665-2666页

作者： Liming ge Jianya Liu jie Wu Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China University of New Hampshire DurhamNH 03824USA School of Mathematics Shandong UniversityJinan 250100China CNRS LAMA 8050 Universite Paris-Est Creteil94010 Creteil CedexFrance

This special issue on Analytic Number Theory is dedicated to Jing-run Chen's Theorem(1+2)on the Goldbach Conjecture,the proof of which was first published in SCIENCE CHINA Mathematics exactly 50 years ***-run Chen was... 详细信息

关键词： China Xiamen proof

Advances in understanding and managing celiac disease:Pathophysiology and treatment strategies

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第35期30卷 3932-3941页

作者： Hao-jie ge Xu-Lin Chen Department of Burns The First Affiliated Hospital of Anhui Medical UniversityHefei 230022Anhui ProvinceChina

In this editorial,we comment on an article published in the recent issue of the World Journal of *** disease(CeD)is a disease occurring in genetically susceptible individuals,which is mainly characterized by gluten intolerance in the small intestine and clinical symptoms such as abdominal pain,diarrhea,and ***,patients often need a lifelong gluten-free diet,which greatly affects the quality of life and expenses of *** gold standard for diagnosis is intestinal mucosal biopsy,combined with serological and genetic *** present,the lack of safe,effective,and satisfactory drugs for CeD is mainly due to the complexity of its pathogenesis,and it is difficult to find a perfect target to solve the multi-level needs of *** this editorial,we mainly review the pathological mechanism of CeD and describe the current experimental and improved drugs for various pathological aspects.

关键词： Celiac disease Gluten-free diet Pathology Human leukocyte antigen Immunotherapy Treatment Aspergillus niger prolyl endoprotease

晚明灾疫应对中的基层政府运作——对万历十五年至十七年徽州府的考察

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

古代文明（中英文） 2025年第1期19卷 128-141,M0007页

作者：葛俊超安徽师范大学历史学院安徽芜湖241000

地方政府的灾疫应对为观察基层治理结构的特殊案例。审视万历十五年至十七年南直隶徽州府灾疫:储备缺失与仓政废弛造成灾害破坏的持续释放,进而引发基层秩序紊乱。围绕资源的配置和获取,该府及所辖诸县积极与上级部门及周边地区政府进... 详细信息

地方政府的灾疫应对为观察基层治理结构的特殊案例。审视万历十五年至十七年南直隶徽州府灾疫:储备缺失与仓政废弛造成灾害破坏的持续释放,进而引发基层秩序紊乱。围绕资源的配置和获取,该府及所辖诸县积极与上级部门及周边地区政府进行互动。在自救无力、他救无望时,该府转而对域内社会力量进行全面动员,直接引导了基层社会的自我修复。该府的灾疫应对行为说明,在明朝晚期,基层政府仍在社会治理中扮演了主要角色。从灾疫处置视角切入基层社会,有助于走出“士绅社会”的定式思维,进一步丰富对帝制中国基层治理结构的认识。

关键词：晚明灾疫基层政府万历徽州