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Integration of Electrical Properties and Polarization Loss Modulation on Atomic Fe–N‑RGO for Boosting Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第2期17卷 517-532页

作者： kaili Zhang Yuefeng Yan Zhen Wang Guansheng Ma Dechang Jia Xiaoxiao Huang Yu Zhou State Key Laboratory of Precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin 150001People’s Republic of China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China MIIT Key Laboratory of Advanced Structural‑Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001People’s Republic of China

Developing effective strategies to regulate graphene’s conduction loss and polarization has become a key to expanding its application in the electromagnetic wave absorption(EMWA)*** on the unique energy band structure of graphene,regulating its bandgap and electrical properties by introducing heteroatoms is considered a feasible ***,metal-nitrogen doping reduced graphene oxide(M–N-RGO)was prepared by embedding a series of single metal atoms M–N_(4) sites(M=Mn,Fe,Co,Ni,Cu,Zn,Nb,Cd,and Sn)in RGO using an N-coordination atom-assisted *** composites had adjustable conductivity and polarization to optimize dielectric loss and impedance matching for efficient EMWA *** results showed that the minimum reflection loss(RL_(min))of Fe–N-RGO reaches−74.05 dB(2.0 mm)and the maximum effective absorption bandwidth(EAB_(max))is 7.05 GHz(1.89 mm)even with a low filler loading of only 1 wt%.Combined with X-ray absorption spectra(XAFS),atomic force microscopy,and density functional theory calculation analysis,the Fe–N_(4) can be used as the polarization center to increase dipole polarization,interface polarization and defect-induced polarization due to d-p orbital hybridization and structural ***,electron migration within the Fe further leads to conduction loss,thereby synergistically promoting energy *** study demonstrates the effectiveness of metal-nitrogen doping in regulating the graphene′s dielectric properties,which provides an important basis for further investigation of the loss mechanism.

关键词： Electromagnetic wave absorption Fe-N-RGO Dipole polarization Conduction loss Impedance matching

Exact Controllability with Internal Controls for First-Order Quasilinear Hyperbolic Systems with Zero Eigenvalues

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Chinese Annals of Mathematics,Series B 2016年第4期37卷 503-514页

作者： kaili ZHUANG School of Mathematical Sciences Fudan University

For first-order quasilinear hyperbolic systems with zero eigenvaiues, the author establishes the local exact controllability in a shorter time-period by means of internal controls acting on suitable domains. In particular, under certain special but reasonable hypotheses, the local exact controllability can be realized only by internal controls, and the control time can be arbitrarily small.

关键词： First-order quasilinear hyperbolic system Zero eigenvalue Exactcontrollability Internal control

Tailpipe emission characterizations of diesel-fueled forklifts under real-world operations using a portable emission measurement system

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Journal of Environmental Sciences 2021年第2期33卷 34-42页

作者： kaili Pang Kaishan Zhang Shuai Ma Department of Environm ental Science and Engineering College of Architecture and EnvironmentSichuan UniversityChengdu 610065China

Non-road equipment is one of the key contributing sources to air ***,an accurate development of emission inventory from non-road equipment is imperative for air quality management,especially for equipment with a large population such as diesel-fueled *** objective of this paper is to characterize duty-cycle based emissions from diesel-fueled forklifts using a portable emission measurement system(PEMS).Three dutycycles were defined in this study,including idling,moving,and working(active duty operation)and used to characterize in-use emissions for diesel-fueled forklifts.A total of twelve diesel-fueled forklifts were selected for real-world emission *** showed that fuel-based emission factors appear to have smaller variability compared to time-based *** example,the time-based emission factors for CO,HC,NO,and PM 2.5 for forklifts were estimated to be 16.6-43.9,5.3-15.1,26.2-49.9,5.5-11.1 g/hr with the fuel-based emission factors being 12.1-20.3,4.1-8.3,19.1-32.4,3.5-6.5 g/kg-fuel,*** emissions appear to be the biggest concern for emissions ***,most of the emissions factors estimated from this study are significantly different from those in both National Guideline for Emission Inventory Development for Non-Road Equipment in China and welldeveloped emission factor models such as NONROAD by US *** implies that localized,preferably fuel-based emission factors should be adjusted based on real-world emission measurements in order to develop a representative emission inventory for non-road equipment.

关键词： Non-road equipment Forklifts Portable emission measurement system(pems) Emission factors Emission inventory

Carbon-free nanoporous gold based membrane electrocatalysts for fuel cells

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Progress in Natural Science:Materials International 2020年第6期30卷 775-786页

作者： kaili Wang Yi Ding Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials and Low-Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology

Nanoporous gold(NPG) membranes made by dealloying consist of a bicontinuous network of Au ligaments and open pore channels, which have gained considerable attention as a platform for the design of carbon-free electrodes for proton exchange membrane fuel cells(PEMFCs). Benefiting from a unique combination of high electronic conductivity, high surface area, and modifiable surface chemistry, these self-supporting membrane type electrodes allow integration of various structural functions required for specific electrode reactions and simultaneously facilitate the entire fuel cell kinetic process. In this review, we summarize the major research progresses in this area, with an emphasis on how to customize the surface structures of these three-dimensional electrocatalysts for desired fuel molecule oxidation and oxidant reduction. We will also discuss these designed structural characteristics that can be readily accommodated in membrane electrode assemblies(MEA), thus effectively bridging the technological gap between electrocatalysts’ intrinsic activities and their actual performances in fuel cells.

关键词： Nanoporous gold Dealloying Electrocatalysts MEA Fuel cells

Fast algorithms for singular value decomposition and the inverse of nearly low-rank matrices

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National Science Review 2023年第6期10卷 24-27页

作者： Chen Xu Weiwei Xu kaili Jing Department of Mathematics and Statistics University of Ottawa School of Mathematics and Statistics Xi'an Jiao Tong University School of Mathematics and Statistics Nanjing University of Information Science and Technology

PROBLEM Matrix computation is a fundamental task in science and engineering;it is recognized as one of the seven computational’giants’of massive data analysis [1],analogous to the seven’dwarfs’in highperformance *** recent years,as the scale of datasets rapidly grows,analysts and engineers frequently need to deal with big matrices with a nearly lowrank *** big size of a matrix brings great numerical hurdles to matrix *** this work,we focus on two typical tasks in matrix computation:singular value decomposition (SVD) and matrix inverse on nearly low-rank matrices that are potentially of big sizes.

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T-QoS-aware based parallel ant colony algorithm for services composition

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Journal of Systems Engineering and Electronics 2015年第5期26卷 1100-1106页

作者： Lin Zhang kaili Rao Ruchuan Wang College of Computer Nanjing University of Posts and Telecommunications Institute of Computer Technology Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Key Lab of Broadband Wireless Communication and Sensor Network Technology Nangjing University of Posts and Telecommunications

In order to make cloud users get credible, high-quality composition of services, the trust quality of service aware(TQoS-aware) based parallel ant colony algorithm is proposed. Our approach takes the service credibility as the weight of the quality of service, then calculates the trust service quality T-QoS for each service, making the service composition situated in a credible environment. Through the establishment on a per-service T-QoS initialization pheromone matrix, we can reduce the colony’s initial search time. By modifying the pheromone updating rules and introducing two ant colonies to search from different angles in parallel,we can avoid falling into the local optimal solution, and quickly find the optimal combination of global solutions. Experiments show that our approach can combine high-quality services and the improvement of the operational success rate. Also, the convergence rate and the accuracy of optimal combination are improved.

关键词： services composition trust service quality ant colony algorithm parallel

Natural products remodel cancer-associated fibroblasts in desmoplastic tumors

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Acta Pharmaceutica Sinica B 2020年第11期10卷 2140-2155页

作者： Rujing Chen Leaf Huang kaili Hu Murad Research Center for Modernized Chinese Medicine Institute of Interdisciplinary Integrative Medicine ResearchShanghai University of Traditional Chinese MedicineShanghai 201203China Division of Pharmacoengineering and Molecular Pharmaceutics Center for Nanotechnology in Drug DeliveryEshelman School of PharmacyUniversity of North Carolina at Chapel HillChapel HillNC 27599USA

Desmoplastic tumors have an abundance of stromal cells and the extracellular matrix which usually result in therapeutic *** treatment prescriptions for desmoplastic tumors are usually not sufficient to eliminate the ***,through modulating cancer-associated fibroblasts(CAFs)which are the most abundant cell type among all stromal cells,natural products have improved chemotherapies and the delivery of nanomedicines to the tumor cells,showing promising ability to improve treatment effects on desmoplastic *** this review,we discussed the latest advances in inhibiting desmoplastic tumors by modeling CAFs using natural products,highlighting the potential therapeutic abilities of natural products in targeting CAFs for cancer treatment.

关键词： Natural products Desmoplastic tumors Cancer-associated fibroblasts Tumor microenvironment Extracellular matrix Traditional Chinese medicine Cancer treatment

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微信小程序在零工市场中的应用与技术实现

福建电脑 2025年第1期41卷 72-78页

作者：杨武锋杨凯利卢玉黔南民族师范学院计算机与信息学院贵州都匀558000

为解决零工市场中信息匹配效率低下问题,本文设计了一个基于微信小程序的技术框架。系统采用前后端分离的架构设计,前端使用uni-app进行微信小程序开发,后端采用Java语言并结合Spring Boot框架进行API服务的实现,数据持久化通过MyBatis-... 详细信息

为解决零工市场中信息匹配效率低下问题,本文设计了一个基于微信小程序的技术框架。系统采用前后端分离的架构设计,前端使用uni-app进行微信小程序开发,后端采用Java语言并结合Spring Boot框架进行API服务的实现,数据持久化通过MyBatis-Plus与MySQL数据库管理系统配合使用。实验结果表明,该框架能够提高信息匹配效率,有助于优化用户体验。

关键词：零工市场信息匹配微信小程序智能匹配

High capacity reversible data hiding in encrypted images based on adaptive quadtree partitioning and MSB prediction

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Frontiers of Information Technology & Electronic Engineering 2023年第8期24卷 1156-1168页

作者： kaili QI Minqing ZHANG Fuqiang DI Yongjun KONG Key Laboratory of Network&Information Security under Chinese People Armed Police Force Engineering University of PAPXi’an710086China

To improve the embedding capacity of reversible data hiding in encrypted images(RDH-EI),a new RDH-EI scheme is proposed based on adaptive quadtree partitioning and most significant bit(MSB)***,according to the smoothness of the image,the image is partitioned into blocks based on adaptive quadtree partitioning,and then blocks of different sizes are encrypted and scrambled at the block level to resist the analysis of the encrypted *** the data embedding stage,the adaptive MSB prediction method proposed by Wang and He(2022)is improved by taking the upper-left pixel in the block as the target pixel,to predict other pixels to free up more embedding *** the best of our knowledge,quadtree partitioning is first applied to *** results show that the proposed method is reversible and separable,and that its average embedding capacity is *** gray images with a size of 512×512,the average embedding capacity is increased by 25565 *** all smooth images with improved embedding capacity,the average embedding capacity is increased by about 35530 bits.

关键词： Adaptive quadtree partitioning Adaptive most significant bit(MSB)prediction Reversible data hiding in encrypted images(RDH-EI) High embedding capacity