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Chinese Chemical Letters 2023年第7期34卷 313-317页

作者： Hongyang Li Bo Cai Yingze Song Wenlong Cai Gaoran Li MIIT Key Laboratory of Advanced Display Materials and Devices College of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing210094China State Key Laboratory of Organic electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&TelecommunicationsNanjing210023China State Key Laboratory of Environmental-Friendly Energy Materials School of Materials Science and EngineeringSouthwest University of Science and TechnologyMianyang621010China department of Advanced Energy Materials College of Materials Science and EngineeringSichuan UniversityChengdu 610064China

Herein, a bidirectional polarization strategy is proposed for hosting efficient and durable lithium-sulfur battery(Li-S) electrochemistry. By co-doping electronegative N and electropositive B in graphene matrix(BNrGO), the bidirectional electron redistribution enables a higher polysulfide affinity over its monodoped counterparts, contributing to strong sulfur immobilization and fast conversion kinetics. As a result,BNrGO as the cathode host matrix realizes excellent cycling stability over 1000 cycles with a minimum capacity fading of 0.027% per cycle, and superb rate capability up to 10 C. Meanwhile, decent areal capacity(6.46 m Ah/cm^(2)) and cyclability(300 cycles) are also achievable under high sulfur loading and limited electrolyte. This work provides instructive insights into the interaction between doping engineering and sulfur electrochemistry for pursuing superior Li-S batteries.

关键词： Lithium-sulfur battery Facile synthesis Heteroatom doping Bidirectional polarization Shuttle effect

Defect suppression and energy level alignment in formamidinium-based perovskite solar cells

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Journal of Energy Chemistry 2022年第4期31卷 65-72页

作者： Yi Wang Xiaobing Wang Chenhui Wang Renying Cheng Lanxin Zhao Xu Wang Xuewen Zhang Jingzhi Shang Huang Zhang Lichen Zhao Yongguang Tu Wei Huang Frontiers Science Center for Flexible electronics Xi’an Institute of Flexible Electronics(IFE)&Xi’an Institute of Biomedical Materials and EngineeringNorthwestern Polytechnical UniversityXi’an 710072ShaanxiChina engineering Research Centre of Environment-Friendly Functional Materials Ministry of EducationFujian Engineering Research Centre of Green Functional MaterialsHuaqiao UniversityXiamen 361021FujianChina Honors College Northwestern Polytechnical UniversityXi’an 710072ShaanxiChina State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of PhysicsFrontiers Science Center for Nano-optoelectronics&Collaborative Innovation Center of Quantum MatterPeking UniversityBeijing 100871China Key Laboratory of Flexible electronics(KLoFE)&Institution of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech UniversityNanjing 211816JiangsuChina Key Laboratory for Organic electronics&Information Displays(KLOEID)&Institute of Advanced Materials(IAM) Nanjing University of Posts and TelecommunicationsNanjing 210023JiangsuChina

The vast majority of high-performance perovskite solar cells(PSCs) are based on a formamidinium lead iodide(FAPbI_(3))-dominant composition. Nevertheless, the FA-based perovskite films suffer from undesirable phase transition and defects-induced non-ideal interfacial recombination, which significantly induces energy loss and hinders the improvement of device performance. Herein, we employed 4-fluorophenylmethylammonium iodide(F-PMAI) to modulate surface structure and energy level alignment of the FA-based perovskite films. The superior optoelectronic films were obtained with reduced trap density, pure α-phase FAPbI_(3) and favorable energy band bending. The lifetime of photogenerated charge carriers increased from 489.3 ns to 1010.6 ns, and a more “p-type” perovskite film was obtained by the post-treatment with F-PMAI. Following this strategy, we demonstrated an improved power conversion efficiency of 22.59% for the FA-based PSCs with an open-circuit voltage loss of 399 m V.

关键词： Perovskite solar cells Defect suppression Energy level alignment Phase transition 4-Fluorophenylmethylammonium iodide

Tunable interlayer excitons and switchable interlayer trions via dynamic near-field cavity

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Light(Science & Applications) 2023年第3期12卷 425-434页

作者： Yeonjeong Koo Hyeongwoo Lee Tatiana Ivanova Ali Kefayati Vasili Perebeinos Ekaterina Khestanova Vasily Kravtsov Kyoung-Duck Park department of Physics Pohang University of Science and Technology(POSTECH)Pohang37673Republic of Korea School of Physics and engineering ITMO UniversitySaint Petersburg197101Russia department of Electrical engineering University at BuffaloNew YorkNY14260USA

Emerging photo-induced excitonic processes in transition metal dichalcogenide(TMD)heterobilayers,e.g.,interplay of intra-and inter-layer excitons and conversion of excitons to trions,allow new opportunities for ultrathin hybrid photonic ***,with the associated large degree of spatial heterogeneity,understanding and controlling their complex competing interactions in TMD heterobilayers at the nanoscale remains a ***,we present an all-round dynamic control of interlayer-excitons and-trions in a WSe_(2)/Mo_(0.5 )W_(0.5) Se_(2) heterobilayer using multifunctional tip-enhanced photoluminescence(TEPL)spectroscopy withengineering of GPa-scale pressure and plasmonic hot electron injection,with simultaneous spectroscopic TEPL *** unique nano-opto-electro-mechanical control approach provides new strategies for developing versatile nano-excitonic/trionic devices using TMD heterobilayers.

关键词： interlayer dynamic tunable

Effect of non-spherical atmospheric charged particles and atmospheric visibility on performance of satellite-ground quantum link and parameters simulation

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The Journal of China Universities of Posts and telecommunications 2017年第6期24卷 39-48页

作者： Shi Li Nie Min Yang Guang Pei Changxing School of Communication and Information engineering Xi'an University of Posts and Telecommunication School of electronics and Information Northwestern Polytechnical University State Key Laboratory of Integrated Service Networks Xidian University

In order to study the relationship between the non-spherical atmospheric charged particles and satellite-ground quantum links attenuation. The relationship among the particle concentration, equivalent radius, charge density of the charged particle, the attenuation coefficient and entanglement of the satellite-ground quantum link can be established first according to the extinction cross section and spectral distribution function of the non-spherical atmospheric charged particles. The quantitative relationship between atmospheric visibility and communication fidelity of satellite-ground quantum link were analyzed then. Simulation results show that the ellipsoid, Chebyshev atmospheric charged particle influences on attenuation of the satellite-ground quantum link increase progressively. When the equivalent particle radius is 0.2 gm and the particle concentration is 50 μg/m^3, the attenuation coefficient and entanglement of the satellite-ground quantum link is 9.21 dB/km, 11.46 dB/km and 0.453, 0.421 respectively; When the atmospheric visibility reduces from 8 km to 2 kin, the communication fidelity of satellite-ground quantum link decreases from 0.52 to 0.08. It is shown that the non-spherical atmospheric charged particles and atmospheric visibility influence greatly on the performance of the satellite-ground quantum link communication system. Therefore, it is necessary to adjust the parameters of the quantum-satellite communication system according to the visibility values of the atmosphere and the shapes of the charged particles in the atmosphere to improve reliability of the satellite-ground quantum link.

关键词： satellite-ground quantum link non-spherical atmospheric charged particles atmospheric visibility degree of quantum entanglement

A home energy management approach using decoupling value and policy in reinforcement learning

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Frontiers of Information Technology & Electronic engineering 2023年第9期24卷 1261-1272页

作者： Luolin XIONG Yang TANG Chensheng LIU Shuai MAO Ke MENG Zhaoyang DONG Feng QIAN Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai 200237China department of Electrical engineering Nantong UniversityNantong 226019China School of Electrical engineering and telecommunications University of New South WalesSydney NSW 2052Australia School of Electrical and electronics engineering Nanyang Technological UniversitySingapore 639798Singapore

Considering the popularity of electric vehicles and the flexibility of household appliances,it is feasible to dispatch energy in home energy systems under dynamic electricity prices to optimize electricity cost and comfort *** this paper,a novel home energy management(HEM)approach is proposed based on a data-driven deep reinforcement learning ***,to reveal the multiple uncertain factors affecting the charging behavior of electric vehicles(EVs),an improved mathematical model integrating driver’s experience,unexpected events,and traffic conditions is introduced to describe the dynamic energy demand of EVs in home energy ***,a decoupled advantage actor-critic(DA2C)algorithm is presented to enhance the energy optimization performance by alleviating the overfitting problem caused by the shared policy and value ***,separate networks for the policy and value functions ensure the generalization of the proposed method in unseen ***,comprehensive experiments are carried out to compare the proposed approach with existing methods,and the results show that the proposed method can optimize electricity cost and consider the residential comfort level in different scenarios.

关键词： Home energy system Electric vehicle Reinforcement learning Generalization

Spatio-Temporal Adaptive Super-Resolution Reconstruction Model Based on Zemike Moment for Spatial Video Sequences

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China Communications 2012年第12期9卷 93-107页

作者： Liang Meiyu Du Junping JangMyung Lee Liu Honggang Zhang Yun Beijing Key Laboratory of Intelligent Telecommunication Software and Multimedia School of Computer Science Beijing University of Posts and Telecommunications Beijing 100876 P. R. China department of electronics engineering Pusan Nation University Busan Korea

Video Super-Resolution （SR） reconstruction produces video sequences with High Resolution （HR） via the fusion of several Low-Resolution （LR） video frames. Traditional methods rely on the accurate estimation of subpixel motion, which constrains their applicability to video sequences with relatively simple motions such as global translation. We propose an efficient iterative spatio-temporal adaptive SR reconstruction model based on Zemike Moment （ZM）, which is effective for spatial video sequences with arbitrary motion. The model uses region correlation judgment and self-adaptive threshold strategies to improve the effect and time efficiency of the ZM-based SR method. This leads to better mining of non-local self-similarity and local structural regularity, and is robust to noise and rotation. An efficient iterative curvature-based interpolation scheme is introduced to obtain the initial HR estimation of each LR video frame. Experimental results both on spatial and standard video sequences demonstrate that the proposed method outperforms existing methods in terms of both subjective visual and objective quantitative evaluations, and greatly improves the time efficiency.

关键词： video super-resolution fuzzy registration scheme Zemike moment non-local self-similarity self-adaptive threshold

无线传感器网络的分布式能量有效非均匀成簇算法

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通信学报 2009年第10期30卷 34-43页

作者：尚凤军 Mehran Abolhasan Tadeusz Wysocki 重庆邮电大学计算机科学与技术学院重庆400065 telecommunications and Information Technology Research Institute University of Wollongong department of Computer and electronics engineering University of Nebraska-Lincoln

研究了现有成簇路由算法,提出了分布式能量有效成簇路由算法,该算法主要包括3部分内容:一是选择候选簇头时通过引入平均能量因子来平衡全网节点的剩余能量情况;二是构造了基于能量和距离的能量消耗率函数以平衡节点的能量效率;三是首次... 详细信息

研究了现有成簇路由算法,提出了分布式能量有效成簇路由算法,该算法主要包括3部分内容:一是选择候选簇头时通过引入平均能量因子来平衡全网节点的剩余能量情况;二是构造了基于能量和距离的能量消耗率函数以平衡节点的能量效率;三是首次提出了基于同构单跳网络的分布式能量有效非均匀成簇路由算法。理论和仿真结果均说明该算法优于EECS,生命周期比EECS延长达到约30%。

关键词：无线传感器网络非均匀成簇能量消耗率函数同构

Phase-matching-induced near-chirp-free solitons in normal-dispersion fiber lasers

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Light(Science & Applications) 2022年第2期11卷 230-241页

作者： Dong Mao Zhiwen He Yusong Zhang Yueqing Du Chao Zeng Ling Yun Zhichao Luo Tijian Li Zhipei Sun Jianlin Zhao Key Laboratory of Light Field Manipulation and Information Acquisition Ministry of Industry and Information TechnologySchool of Physical Science and TechnologyNorthwestern Polytechnical University710129 Xi’anChina College of Electronic and Optical engineering&College of Microelectronics Nanjing University of Posts and Telecommunications210046 NanjingChina Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices&Guangzhou Key Laboratory for Special Fiber Photonic Devices and Applications South China Normal University510006 GuangzhouChina department of electronics and Nanoengineering and QTF Centre of Excellence Aalto UniversityAaltoFinland

Direct generation of chirp-free solitons without external compression in normal-dispersion fiber lasers is a long-term challenge in ultrafast *** demonstrate near-chirp-free solitons with distinct spectral sidebands in normaldispersion hybrid-structure fiber lasers containing a few meters of polarization-maintaining *** bandwidth and duration of the typical mode-locked pulse are 0.74 nm and 1.95 ps,respectively,giving the time-bandwidth product of 0.41 and confirming the near-chirp-free *** results and theoretical analyses fully reproduce and interpret the experimental observations,and show that the fiber birefringence,normal-dispersion,and nonlinear effect follow a phase-matching principle,enabling the formation of the near-chirp-free ***,the phasematching effect confines the spectrum broadened by self-phase modulation and the saturable absorption effect slims the pulse stretched by normal *** pulse is termed as birefringence-managed soliton because its two orthogonal-polarized components propagate in an unsymmetrical“X”manner inside the polarization-maintaining fiber,partially compensating the group delay difference induced by the chromatic dispersion and resulting in the selfconsistent *** property and formation mechanism of birefringence-managed soliton fundamentally differ from other types of pulses in mode-locked fiber lasers,which will open new research branches in laser physics,soliton mathematics,and their related applications.

关键词： fiber polarization dispersion

High-performance, low-cost joint equalizer and trellis decoder for 1000BASE-T gigabit Ethernet transceiver

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The Journal of China Universities of Posts and telecommunications 2007年第2期14卷 106-111页

作者： ZHU Yue RONG Meng-tian department of Electronic engineering School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China

This article presents an M-algorithm （MA） decoder with 4 survival paths （MA4） for Institute of Electrical and electronics Engineers （IEEE） 802.3ab 1000BASE-T gigabit Ethernet （GbE） transceiver. To fulfill the entire requirements, various methods were introduced to accelerate the MA4 decoder while retaining the desired high performance and low complexity. Optimized look-ahead architecture was employed to solve the critical path problem with minimal gate consumption. Symbol compression methods saved registers during pipeline stages. A sorting network accelerated the kernel sorting operation at low hardware cost by utilizing the special characteristics of MA4. Simulations and synthesis results show that the proposed decoder achieves 125 MHz clock frequency and l Gb/s throughput in 1.8 V 0.18μm standard cell complementary metal-oxide-semiconductor （CMOS） process. It achieves additional 0.4 dB coding gain over 14tap parallel decision feedback decoder （PDFD） with 39% area reduction.

关键词： 1000BASE-T GbE M-algorithm PDFD look-ahead technology

High-Bandwidth,Low-Power CMOS Transistor Based CAB for Field Programmable Analog Array

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Computers, Materials & Continua 2023年第3期74卷 5885-5900页

作者： Ameen Bin Obadi Alaa El-Din Hussein Samir Salem Al-Bawri Kabir Hossain Abdullah Abdulhameed Muzammil Jusoh Thennarasan Sabapathy Ahmed Jamal Abdullah Al-Gburi Mahmoud A.Albreem Advanced Communication engineering(ACE) Centre of ExcellenceUniversiti Malaysia Perlis(UniMAP)Faculty of Electronic Engineering TechnologyKangar01000Malaysia Electrical engineering King Fahd University of Petroleum and MineralsDhahranEastern31261Saudi Arabia Space Science Centre Climate Change InstituteUniversiti Kebangsaan MalaysiaBangi43600Malaysia department of electronics&Communication engineering Faculty of Engineering&PetroleumHadhramout UniversityAl-MukallaHadhramout50512Yemen Faculty of engineering Norwegian University of Science and Technology(NTNU)GjovikN-2815Norway Faculty of Electronic engineering Technology Universiti Malaysia Perlis(UniMAP)Kampus Alam UniMAP Pauh PutraArau02600Malaysia department of General Educational Development Faculty of Science and Information Technology(FSIT)Daffodil International UniversityDhaka1207Bangladesh department of electronics and Computer engineering(FKEKK) Center for Telecommunication Research and Innovation(CeTRI)Universiti Teknikal Malaysia Melaka(UTeM)Durian Tungal76100Malaysia department of Electrical engineering University of SharjahSharjah27272United Arab Emirates

This article presents an integrated current mode configurable analog block(CAB)system for field-programmable analog array(FPAA).The proposed architecture is based on the complementary metal-oxide semiconductor(CMOS)transistor level design where MOSFET transistors operating in the saturation region are *** proposed CAB architecture is designed to implement six of thewidely used current mode operations in analog processing systems:addition,subtraction,integration,multiplication,division,and pass *** functionality of the proposed CAB is demonstrated through these six operations,where each operation is chosen based on the user’s selection in the CAB interface *** architecture of the CAB system proposes an optimized way of designing and integrating only three functional cells with the interface circuitry to achieve the six ***,optimized programming and digital tuning circuitry are implemented in the architecture to control and interface with the functional ***,these designed programming and tuning circuitries play an essential role in optimizing the performance of the proposed *** of the proposed CMOS Transistor Based CAB system is carried out using Tanner EDA Tools in 0.35μm standard CMOS *** design uses a±1.5 V power supply and results in maximum 3 dB bandwidth of 34.9 MHz and an approximate size of 0.0537 *** demonstrates the advantages of the design over the current state-of-the-art designs presented for comparison in this ***,the proposed design has a clear aspect of simplicity,low power consumption,and high bandwidth operation,which makes it a suitable candidate for mobile telecommunications applications.

关键词： CMOS field programmable analog array configurable analog block current mode circuit