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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 786-794页

作者： Xu Zhao Naitao Gao Shengcheng wu Shaozhen Li Sujuan wu School of Electrical and Electronic Engineering Wuhan Polytechnic UniversityWuhan 430023China Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China

CsPbX_(3)-based(X=I,Br,Cl)inorganic perovskite solar cells(PSCs)prepared by low-temperature process have attracted much attention because of their low cost and excellent thermal ***,the high trap state density and serious charge recombination between low-temperature processed TiO_(2)film and inorganic perovskite layer interface seriously restrict the performance of all-inorganic *** a thin polyethylene oxide(PEO)layer is employed to modify TiO_(2)film to passivate traps and promote carrier *** impacts of PEO layer on microstructure and photoelectric characteristics of TiO_(2)film and related devices are systematically *** results suggest that PEO modification can reduce the surface roughness of TiO_(2)film,decrease its average surface potential,and passivate trap *** optimal conditions,the champion efficiency of CsPbI_(2)Br PSCs with PEO-modified TiO_(2)(PEO-PSCs)has been improved to 11.24%from 9.03%of reference ***,the hysteresis behavior and charge recombination have been suppressed in PEO-PSCs.

关键词： polyethylene oxide-modified TiO_(2) film low-temperature process CsPbI_(2)Br-based all-inorganic perovskite solar cells photo-voltaic performance

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浅谈城市污水除磷技术

上海环境科学 1992年第12期11卷 18-20页

作者：陈绍伟吴志超同济大学

结合我国城市污水处理现状,简要介绍了几种主要的除磷技术在城市污水处理厂改造或新建时应用的可能性,并比较了它们的优缺点和应用过程中需注意的一些问题。

关键词：除磷城市污水废水处理

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国家临床重点专科督导与评估机制研究

中国医院 2023年第8期27卷 13-15页

作者：吴少玮汪业胜方鹏骞华中科技大学同济医学院附属协和医院湖北省武汉市430022 华中科技大学健康政策与管理研究院湖北省武汉市430022

国家临床重点专科建设是提升医疗服务能力的重要内容之一。通过督导与评估可以及时掌握国家临床重点专科项目建设的进度,总结专科建设的成效,为决策者调整工作方向提供依据。作者分析了国家临床重点专科建设项目督导与评估现状,聚焦督... 详细信息

国家临床重点专科建设是提升医疗服务能力的重要内容之一。通过督导与评估可以及时掌握国家临床重点专科项目建设的进度,总结专科建设的成效,为决策者调整工作方向提供依据。作者分析了国家临床重点专科建设项目督导与评估现状,聚焦督导与评估的主要问题:项目督导与评估方法多样性不够且缺乏过程管理、信息化系统建设滞后于督导与评估需求、缺乏临床专科评价指南或标准以及督导与评估结果促进专科持续发展的力度不够。针对上述问题,建议完善国家临床重点专科建设项目督导与评估体系建设、多维度开展国家临床重点专科项目督导与评估、项目督导与评估应加强过程管理、大力推进医疗行业信息化建设、结果评价机制要体现项目目标导向以及充分利用督导与评估结果推进专科持续发展等,以保障专科建设达到预期目标、实现临床专科能力的提升。

关键词：国家临床重点专科专科建设督导评估临床专科

A GNSS Anti-Spoofing Technique Based on the Spatial Distribution Characteristic of the Residual Vectors

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Tsinghua Science and Technology 2024年第2期29卷 457-468页

作者： Qi'an wu Xiaowei Cui Mingquan Lu Pengxiang Yang Peng wu Department of Electronic Enginnering Tsinghua UniversityBeijing 100084China Xi’an Modern Control Technology Research Institute Xi’an 710065China

Anti-spoofing is becoming a crucial technique for applications with high navigation accuracy and reliability ***-spoofing technique based on Receiver Autonomous Integrity Monitoring(RAIM)is a good choice for most Global Navigation Satellite System(GNSS)receivers because it does not require any change to the hardware of the ***,the conventional RAIM method can only detect and mitigate a single spoofing *** improved RAIM methods can deal with more spoofing signals,but the computational complexity increases dramatically when the number of satellites in view increase or need additional *** paper proposes a new RAIM method,called the SRV-RAIM method,which has a very low computation complexity regardless of the number of satellites in view and can deal with any number of spoofing *** key to the new method is the spatial distribution characteristic of the Satellites'Residual Vectors(SRV).In replay or generative spoofing scenarios,the pseudorange measurements of spoofing signals are consistent,the residual vectors of real satellites and those of spoofing satellites have good separation characteristics in spatial *** on this characteristic,the SRV-RAIM method is proposed,and the simulation results show that the method can separate the real signals and the spoofing signals with an average probability of 86.55%in the case of 12 visible satellites,regardless of the number of spoofing *** to the conventional traversal-RAIM method,the performance is only reduced by 3.59%,but the computational cost is reduced by 98.3%,so most of the GNSS receivers can run the SRV-RAIM algorithm in time.

关键词： Global Navigation Satellite System(GNSS) anti-spoofing Receiver Autonomous Integrity Monitoring(RAIM) Satellites'Residual Vectors(SRV)

Effective Identity Authentication Based on Multiattribute Centers for Secure Government Data Sharing

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Tsinghua Science and Technology 2024年第3期29卷 736-752页

作者： Meiquan Wang Junhua wu Tongdui Zhang Junhao wu Guangshun Li School of Computer Science Qufu Normal UniversityRizhao 276800China Science and Technology Innovation Service Institution of Rizhao Rizhao 276800China

As one of the essential steps to secure government data sharing,Identity Authentication(IA)plays a vital role in the processing of large ***,the centralized IA scheme based on a trusted third party presents problems of information leakage and single point of failure,and those related to key ***,herein,an effective IA model based on multiattribute centers is ***,a private key of each attribute of a data requester is generated by the attribute authorization *** obtaining the private key of attribute,the data requester generates a personal private ***,a dynamic key generation algorithm is proposed,which combines blockchain and smart contracts to periodically update the key of a data requester to prevent theft by external attackers,ensure the traceability of IA,and reduce the risk of privacy ***,the combination of blockchain and interplanetary file systems is used to store attribute field information of the data requester to further reduce the cost of blockchain information storage and improve the effectiveness of information *** results show that the proposed model ensures the privacy and security of identity information and outperforms similar authentication models in terms of computational and communication costs.

关键词： blockchain identity authentication distribution dynamic key generation

Optically levitated micro gyroscopes with an MHz rotational vaterite rotor

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Microsystems & Nanoengineering 2024年第3期10卷 219-227页

作者： Kai Zeng Xiangming Xu Yulie wu Xuezhong wu Dingbang Xiao College of Intelligence Science and Technology National University of Defense TechnologyChangsha 410073China College of Information and Communication National University of Defense TechnologyWuhan 430000China Key Laboratory of Satellite Navigation Technology National University of Defense TechnologyChangsha 410073China

The field of levitated optomechanics has experienced significant advancements in manipulating the translational and rotational dynamics of optically levitated particles and exploring their sensing *** concept of using optically levitated particles as gyroscopes to measure angular motion has long been explored but has not yet been proven either theoretically or *** this study,we present the first rotor gyroscope based on optically levitated high-speed rotating *** gyroscope is composed of a micrometer-size ellipsoidal vaterite particle that is driven to rotate at MHz frequencies in a vacuum *** an external angular velocity is input,the optical axis deviates from its initial position,resulting in changes in the frequency and amplitude of the rotational *** analyzing these changes,the angular velocity of the input can be accurately detected,making it the smallest rotor gyroscope in the *** angular rate bias instability of the gyroscope is measured to be 0.08°/s and can be further improved to as low as 10^(−9)°/h theoretically by cooling the motion and increasing the angular moment of the levitated *** work opens a new application paradigm for levitated optomechanical systems and may pave the way for the development of quantum rotor gyroscopes.

关键词： particles rotational angular

Design and Implementation of Nonlinear Precoding for MIMO-SDMA Toward 6G Wireless

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China Communications 2024年第1期21卷 69-87页

作者： Chaowu wu Yue Xiao Shu Fang Gang wu National Key Laboratory of Wireless Communications University of Electronic Science and Technology of ChinaChengdu 611731China

In this paper,we present a novel and robust nonlinear precoding(NLP)design and detection structure specifically tailored for multiple-input multipleoutput space division multiple access(MIMO-SDMA)systems toward 6G *** approach aims to effectively mitigate the impact of imperfect channel estimation by leveraging the channel fluctuation mean square error(MSE)for reconstructing a highly accurate precoding matrix at the ***,we introduce a simplified receiver structure that eliminates the need for equalization,resulting in reduced interference and notable enhancements in overall system *** conduct both computer simulations and experimental tests to validate the efficacy of our proposed *** results reveals that the proposed NLP scheme offers significant performance improvements,making it particularly well-suited for the forthcoming 6G wireless.

关键词： MIMO-SDMA nonlinear precoding Tomlinson-Harashima precoding(THP) vector perturbation(VP)

不同蓝光及照射方式治疗新生儿高胆红素血症临床分析

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现代医院 2015年第5期15卷 74-76,78页

作者：吴少伟潘学军佛山市南海区第五人民医院广东佛山528231

目的观察不同蓝光和不同照射方式治疗新生儿高胆红素血症的临床疗效及不良反应。方法选取127例高胆红素血症新生儿分为冷光源蓝光持续照射组(A组,n=32)、冷光源蓝光间歇照射组(B组,n=32)、传统蓝光持续照射组(C组,n=31)和传统蓝光间歇... 详细信息

目的观察不同蓝光和不同照射方式治疗新生儿高胆红素血症的临床疗效及不良反应。方法选取127例高胆红素血症新生儿分为冷光源蓝光持续照射组(A组,n=32)、冷光源蓝光间歇照射组(B组,n=32)、传统蓝光持续照射组(C组,n=31)和传统蓝光间歇照射组(D组,n=32),四组疗程均为72 h,分别观察四组新生儿治疗前后血清总胆红素、直接胆红素水平、听性脑干反应,记录并比较四组新生儿与治疗相关的不良反应。结果四组治疗后的血清总胆红素水平较治疗前均有明显下降(p0.05);治疗后9个月四组听性脑干反应均恢复正常。结论采用冷光源蓝光照射治疗新生儿高胆红素血症临床效果明显,可以有效降低新生儿听力损害,且间断照射与持续照射的总有效率和不良反应发生率相当。

关键词：新生儿高胆红素血症冷光源蓝光传统蓝光照射方式听性脑干反应

Integrated Clustering and Routing Design and Triangle Path Optimization for UAV-Assisted Wireless Sensor Networks

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China Communications 2024年第4期21卷 178-192页

作者： Shao Liwei Qian Liping wu Mengru wu Yuan College of Information Engineering Zhejiang University of TechnologyHangzhou 310014China State Key Laboratory of Internet of Things for Smart City University of MacaoMacaoChina Department of Computer and Information Science University of MacaoMacaoChina

With the development of the Internet of Things(IoT),it requires better performance from wireless sensor networks(WSNs),such as larger coverage,longer lifetime,and lower ***,a large amount of data generated from monitoring and long-distance transmission places a heavy burden on sensor nodes with the limited battery *** this,we investigate an unmanned aerial vehicles assisted mobile wireless sensor network(UAV-assisted WSN)to prolong the network lifetime in this ***,we use UAVs to assist the WSN in collecting *** the current UAV-assisted WSN,the clustering and routing schemes are determined ***,such a separate consideration might not maximize the lifetime of the whole WSN due to the mutual coupling of clustering and *** efficiently prolong the lifetime of the WSN,we propose an integrated clustering and routing scheme that jointly optimizes the clustering and routing *** the whole network space,it is intractable to efficiently obtain the optimal integrated clustering and routing ***,we propose the Monte-Las search strategy based on Monte Carlo and Las Vegas ideas,which can generate the chain matrix to guide the algorithm to find the solution *** point-to-point collection leads to long collection paths,so a triangle optimization strategy is then proposed that finds a compromise path to shorten the collection path based on the geometric distribution and energy of sensor *** avoid the coverage hole caused by the death of sensor nodes,the deployment of mobile sensor nodes and the preventive mechanism design are *** emergency data transmission mechanism is further proposed to reduce the latency of collecting the latency-sensitive data due to the absence of *** with the existing schemes,the proposed scheme can prolong the lifetime of the UAVassisted WSN at least by 360%,and shorten the collection path of UAVs by 56.24%.

关键词： Monte-Las search strategy triangle path optimization unmanned aerial vehicles wireless sensor networks

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大学生数字素养调查研究

图书馆建设 2024年第3期 127-138,149页

作者：孙绍伟中山大学信息管理学院

采用问卷调查法搜集749份有效问卷,以调查大学生的数字素养水平,并探索不同群组的大学生是否面临数字鸿沟,以及数字经验与其数字素养是否具有相关性。结果发现:大学生自我报告的数字素养总体良好,但内容与创造能力是其短板;不同地区、... 详细信息

采用问卷调查法搜集749份有效问卷,以调查大学生的数字素养水平,并探索不同群组的大学生是否面临数字鸿沟,以及数字经验与其数字素养是否具有相关性。结果发现:大学生自我报告的数字素养总体良好,但内容与创造能力是其短板;不同地区、性别、教育水平的大学生面临着数字鸿沟;大学生常用App数量与数字素养总分及五个维度均存在显著正向关系,但大学生数字设备日常使用时长仅与信息与数据、内容与创造两个维度存在显著负向关系。因此,大学生数字素养培育应注重融合数字素养教育与专业教育,培育创新能力;构建精细化数字素养教育体系,消弭数字鸿沟;创建多元化数字素养教育场景,促进全面发展。

关键词：数字素养大学生数字创新能力数字鸿沟数字经验感知水平