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When AI meets sustainable 6G

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Science China(Information Sciences) 2025年第1期68卷 4-22页

作者： Xiaohu YOU Yongming HUANG Cheng ZHANG Jiaheng WANG Hao YIN Hequan WU National Mobile Communications Research Laboratory Southeast University Purple Mountain Laboratories Chinese Academy of Military Science China Information Communication technologies Group

Sixth-generation(6G) networks are anticipated to achieve transformative advancements, characterized by extreme connectivity, deep integration with artificial intelligence(AI) and sensing, and airground integration. The evolution of 6G exhibits two major trends: ubiquitous intelligence and sustainability. The former aims to embed state-of-the-art AI technology into the 6G network, from the physical layers to applications, while the latter emphasizes reducing energy consumption while enhancing network performance to address environmental concerns. Despite the amazing progress in recent years, AI advancements come with substantial increases in data and computational overhead, posing critical challenges for integrating AI into sustainable 6G networks. First, high energy consumption from large datasets and heavyweight AI models contradicts6G's green goals. Second, the precise collection of large datasets, message delivery latency, and inference delays in AI models pose challenges for real-time tasks in 6G. Third, the uninterpretability and unpredictability of AI models complicate meeting the stringent requirements for controllable transmission in dynamic wireless environments. Addressing these challenges and achieving sustainable 6G with ubiquitous intelligence calls for a revolutionary design of 6G architecture and AI frameworks. To this end, this paper introduces a novel and practical methodology for green, real-time, and controllable 6G native intelligence,starting with knowledge graph(KG) analysis to extract small but critical datasets, followed by the development of distributed lightweight AI models, and the use of digital twins(DTs) to create precise replicas of physical 6G networks. This leads to a pervasive multi-level(PML)-AI framework supported by a task-centric, three-layer 6G architecture. The AI framework operates through non-real-time and real-time cycles, leveraging three key technologies: wireless data KGs for efficient data management,lightweight AI mode

关键词： artificial intelligence sustainable 6G green real-time controllable

Key Challenges to Maintenance Activities in Clinical Engineering

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中国医疗设备 2016年第11期31卷 1-8页

作者： Azman Hamid next level technologies

Objective Maintenance of biomedical equipment has undergone tremendous improvements over the last several decades since the publication of Ralph Nader’s fateful article in *** uproar caused by Nader’s article had called for stringent electrical safety *** engineering fraternities worldwide hurried to provide solutions and addressed the *** the process,we saw improvements in many areas of clinical ***,despite these improvements,clinical engineering is still grappling with challenges in its maintenance activities that seem to *** paper seeks to identify these challenges which have caused difficulties,and to some extent,impede the performance of effective *** paper also seeks to propose solutions and recommendations for *** Over the course of his work,the author has noticed areas that have posed major challenges in clinical *** such challenge is in the area of clinical engineering ***-standardization in maintenance activities is another area where some tough decisions may be needed. Other challenges will be identified, explained and where possible,solutions will be *** In this paper, the author identifies ten major challenges that have affected the provision of clinical engineering *** of these challenges,if properly addressed may significantly improve healthcare delivery and/or provide clinical engineering with clear guidelines on the breadth and limits of the *** have severely affected maintenance performances while several have been left unattended and ***,the ten challenges are common and normally experienced at clinical engineering department across the *** By pointing out these key challenges,clinical engineering practitioners would be able to identify shortfalls and trends in clinical engineering maintenance and systematically focus their attention towards assisting in problem solving. With the challeng

关键词： clinical engineering clinical engineering practitioners clinical engineering certification clinical engineering competency biomedical equipment healthcare technology management medical devices

Preparation of Co/S co-doped carbon catalysts for excellent methylene blue degradation

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 169-181页

作者： Haixu Li Haobo He Tiannan Jiang Yunfei Du Zhichen Wu Liang Xu Xinjie Wang Xiaoguang Liu Wanhua Yu Wendong Xue School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Beijing Jinyu Tongda Refractory technologies Co. Ltd.Beijing 100085China

S and Co co-doped carbon catalysts were prepared via pyrolysis of MOF-71 and thiourea mixtures at 800℃at a mass ratio of MOF-71 to thiourea of 1:0.1 to effectively activate peroxymonosulfate(PMS)for methylene blue(MB)*** effects of two different mixing routes were identified on the MB degradation ***,the catalyst obtained by the alcohol solvent evaporation(MOF-AEP)mixing route could degrade 95.60%MB(50 mg/L)within 4 min(degradation rate:K=0.78 min^(-1)),which was faster than that derived from the direct grinding method(MOF-DGP,80.97%,K=0.39 min^(-1)).X-ray photoelectron spectroscopy revealed that the Co-S content of MOF-AEP(43.39at%)was less than that of MOF-DGP(54.73at%),and the proportion of C-S-C in MOF-AEP(13.56at%)was higher than that of MOF-DGP(10.67at%).Density functional theory calculations revealed that the adsorption energy of Co for PMS was -2.94 eV when sulfur was doped as C-S-C on the carbon skeleton,which was higher than that when sulfur was doped next to cobalt in the form of Co-S bond(-2.86 eV).Thus,the C-S-C sites might provide more contributions to activate PMS compared with ***,the degradation parameters,including pH and MOF-AEP dosage,were ***,radical quenching experiments and electron paramagnetic resonance(EPR)measurements revealed that ^(1)O_(2)might be the primary catalytic species,whereas·O~(2-)might be the secondary one in degrading MB.

关键词： advanced oxidation process alcohol solvent evaporation hydrogen bond S and Co co-doped carbon catalysts wastewater remediation

AlO2: A novel two-dimensional material with a high negative Poisson's ratio for the adsorption of volatile organic compounds

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Chinese Chemical Letters 2025年第2期36卷 557-563页

作者： Xinghong Cai Qiang Yang Yao Tong Lanyin Liu Wutang Zhang Sam Zhang Min Wang Chongqing Key Laboratory for Advanced Materials and technologies of Clean Energies School of Materials and EnergySouthwest University BatteroTech Co. Ltd. School of Astronautics Harbin Institute of Technology Zhengzhou Research Institute Harbin Institute of Technology

We propose and investigate a novel stable two-dimensional（2D） AlO2with anomalous stoichiometric ratios based on first-principles calculation. 2D AlO2has metallic properties. It possesses the rare in-plane and out-of-plane negative Poisson's ratio（NPR） phenomenon, originating from its special sawtooth-like structure. The absolute value of the NPR decreases as the number of layers increases. The adsorption of volatile organic compounds（VOCs） including CH2O, C2H3Cl and C6H6by AlO2exhibit small adsorption distance, large adsorption energy, large charge transfer and significant density of states（DOS） changes,indicating the presence of strong interactions. The desorption time of each gas molecule on the AlO2surface is also evaluated, and the results further suggest that the desorption of VOCs can be controlled by changing the temperature to achieve the recycling of AlO2. These interesting properties make 2D AlO2a promising material for electronic, mechanical and sensing applications for VOCs.

关键词： AlO2 First-principles calculations Negative Poisson's ratio Two-dimensional material VOCs

Is Minimizing Flow Completion Time the Optimal Way in Meeting Flow's Deadline in Datacenter Networks

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China Communications 2016年第S1期13卷 6-15页

作者： XU Yakun LUO Hongbin REN Fei National Engineering Laboratory for next Generation Internet technologies School of Electronic and Information Engineering Beijing Jiaotong University

In modern datacenters, the most common method to solve the network latency problem is to minimize flow completion time during the transmission process. Following the soft real-time nature, the optimization of transport latency is relaxed to meet a flow's deadline in deadline-sensitive services. However, none of existing deadline-sensitive protocols consider deadline as a constraint condition of *** can only simplify the objective of meeting a flow's deadline as a deadline-aware mechanism by assigning a higher priority for tight-deadline constrained flows to finish the transmission as soon as possible, which results in an unsatisfactory effect in the condition of high fan-in degree. It drives us to take a step back and rethink whether minimizing flow completion time is the optimal way in meeting flow's deadline. In this paper, we focus on the design of a soft real-time transport protocol with deadline constraint in datacenters and present a flow-based deadline scheduling scheme for datacenter networks(FBDS).FBDS makes the unilateral deadline-aware flow transmission with priority transform into a compound centralized single-machine deadlinebased flow scheduling decision. In addition, FBDS blocks the flow sets and postpones some flows with extra time until their deadlines to make room for the new arriving flows in order to improve the deadline meeting rate. Our simulation resultson flow completion time and deadline meeting rate reveal the potential of FBDS in terms of a considerable deadline-sensitive transport protocol for deadline-sensitive interactive services.

关键词： datacenter networks deadline preemptive scheduling flow completion time

Physiological Variance of CD34 Marker’s Content in Twenty Tissues Determining Different Risks of Cardiovascular Diseases and Cancer in Them

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Open Journal of Biophysics 2025年第1期15卷 1-17页

作者： Aleksey N. Shoutko Marat A. Karamullin Department of Transplantation and Cells technologies A. M. Granov Russian Research Center for Radiology and Surgical Technologies Saint-Petersburg Russia Department of Battle-Field Therapy Military Medical Academy Saint-Petersburg Russia

The decreasing of hazard ratio for cancer incidence (HRCVD) in the range of twenty native tissues (lung, liver, brain, hematologic, neuroendocrine renal, pancreas, lymphoid, bladder, colon, lip-oral-head-neck, leukocytic, rectum and anus, thyroid, soft tissue, prostate, skin, ovarian, breast, uterine) as much, as decreasing of the level of cardiovascular pathology (CVD) in the host before malignization, have been described by C.F. Bell et al. in 2023. Earlier, in 2022, the decreasing of 5-year mortality from cancer in similar range of tissues discussed by us as the inverse dependence from the content of stem CD34 markers in tissues before malignization, with example of population in England. In present article we investigate the interrelation between both data more thoroughly, using accessible and more representative populations level of the data. The analysis shows that high level of HRCVD is able to predicts only high cancer death for tissue sites in the beginning of the range, being applied to the referent data of cancer cases and deaths in estimated population of USA 2024. Along with this, an increasing the content of CD34 stem marker in the native tissues of the same range was favorite for increasing of cancer’s cases at the end of the range, diminishing, in parallel, the signs of vasculo-endothelial pathology, i.e. HR CVD. Thus, the cases (incidence) of cancer depend directly rather from content of CD34, which preexisted in native sites, than that from HRCVD. Further analysis shows that CD34 content averaged over twenty cites dominates over that CD2 marker of total T-cells more than 7 times, in oppose to their ratio in the blood. The enhancement of stem CD34 marker in the range of tissues is accompanied by unidirectional rising of its maturing derivatives, vasculo-endothelial CD31 and total T-cells CD2 markers, which contents relate positively to increasing of cancer death in US population 2024. The increase of CD34 decreases cancer mortality (death: cases) in

关键词： Population Cardiovascular Pathology Cancers Interrelation Tissues CD Markers Prognostic Value Revision

All-Fibre Ytterbium-Doped Photonic Crystal Fibre Laser with High Efficiency

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Chinese Physics Letters 2008年第3期25卷 960-962页

作者：陈伟李进延陆培祥李诗愈季玲玲蒋作文张继皇彭景刚 Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 National Key Laboratory for next Generation Fiber Communication technologies and Networks Fiberhome Telecommunication Technologies Co. Ltd Wuhan 430074

A double-cladding ytterbium-doped photonic crystal fibre （PCF） with a 350-μm^2 effective area is fabricated. The measurement results show that the PCF has high absorption peak at 915 nm. Its fluorescence lifetime is 840μs. Laser experiments with all-fibre configurations are carried out with this fibre. A continuous-wave output power of 3.96 W is achieved with a 5.2 W launched pump power. The central wavelength of the output spectrum is 1080.22nm. The results show that the PCF laser has a high slope efficiency of 79.6% and light conversion efficiency of 76.2%.

关键词： HELICAL-CORE MODE-AREA POWER OPERATION DESIGN

Improving performance of perovskite solar cells enabled by defects passivation and carrier transport dynamics regulation via organic additive

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Chinese Chemical Letters 2025年第2期36卷 551-556页

作者： Rongjun Zhao Tai Wu Yong Hua Yude Wang Department of Physics Center for Optoelectronics Engineering ResearchYunnan University Yunnan Key Laboratory for Micro/Nano Materials&Technology International Joint Research Center for Optoelectronic and Energy MaterialsSchool of Materials and EnergyYunnan University Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon technologies Yunnan University

Defects at the grain boundaries(GBs) of perovskite film highly restrict both the efficiency and stability of perovskite solar cells(PSCs). Herein, organic small molecules of butanedioic acid(BA) and acetylenedicarboxylic acid(AA), containing two carbonyl(C=O) groups and different core-units, were incorporated into perovskite as additives for PSCs application. Thanks to the strong coordination interaction between C=O group and under-coordinated Pb2+, the additives can effectively passivate film defects and regulate the perovskite crystallization, yielding high-quality perovskite films with lower defect densities. More importantly, the additives can efficiently regulate the charge transport behaviors in PSCs. Benefiting from the defects passivation and the regulation of charge carrier dynamics, the BA and AA-treaded PSCs show the power conversion efficiencies of 21.52% and 20.50%, which are higher than that of the control device(19.41%). Besides, the optimal devices exhibit a remarkable enhanced long-term stability and moisture tolerance compared to the pristine devices. Furthermore, the transient absorption spectrum reveals the mechanism of enhanced photovoltaic performances, attributing to the improvement of charge transport capability at the perovskite/Spiro-OMeTAD interfaces. This work affords a promising strategy to improve the efficiency and stability of PSCs through regulating the charge-carrier dynamic process in perovskite film.

关键词： Additives Carrier dynamics Defects passivation Perovskite solar cells Stability

ICN Based Vehicle-to-Cloud Delivery for Multimedia Streaming in Urban Vehicular Networks

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China Communications 2016年第9期13卷 103-112页

作者： Wei Quan Fei Song Chengxiao Yu Mingchuan Zhang National Engineering Laboratory for next Generation Internet technologies School of Electronic and Information EngineeringBeijing Jiaotong University College of Information Engineering Henan University of Science and Technology

Mobile multimedia streaming is an open topic in vehicular environment. Due to the high intermittent links, it has become a critical challenge to deliver high quality video streaming in vehicular networks. In this paper, we reform the Information Centric Networking （ICN） concept for multimedia delivery in urban vehicular networks. By leveraging the 1CN perspective, we highlight that vehicular peers can obtain multimedia chunks via the vehicle-to-cloud （V2C） approach to improve the delivery quality. Based on this, we propose a lightweight multipath selection strategy to guide the network system to adaptively adjust the forwarding means. Extensive simulations show that the proposed solution can optimize the utilization of network paths, lighten network loads as well as avoid wasting resources.

关键词： information centric networking vehicle-to-cloud multimedia streaming VANET