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EFFECT: an efficient flexible privacy-preserving data aggregation scheme with authentication in smart grid

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Science China(Information Sciences) 2019年第3期62卷 31-44页

作者： Zhitao GUAN Yue ZHANG Liehuang ZHU longfei wu Shui YU School of Control and Computer Engineering North China Electric Power University School of Computer Beijing Institute of Technology Department of Mathematics and Computer Science Fayetteville State University School of Information Technology Deakin University

Smart grid is considered as a promising approach to solve the problems of carbon emission and energy crisis. In smart grid, the power consumption data are collected to optimize the energy ***, security issues in communications still present practical concerns. To cope with these challenges, we propose EFFECT, an efficient flexible privacy-preserving aggregation scheme with authentication in smart grid. Specifically, in the proposed scheme, we achieve both data source authentication and data aggregation in high efficiency. Besides, in order to adapt to the dynamic smart grid system, the threshold for aggregation is adjusted according to the energy consumption information of each particular residential area and the time period, which can support fault-tolerance while ensuring individual data privacy during *** security analysis shows that our scheme can satisfy the desired security requirements of smart *** addition, we compare our scheme with existing schemes to demonstrate the effectiveness of our proposed scheme in terms of low computational complexity and communication overhead.

关键词： privacy-preserving authentication batch verification smart grid

Dynamic Model and Motion Mechanism of Magnetotactic Bacteria with Two Lateral Flagellar Bundles

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Journal of Bionic Engineering 2012年第2期9卷 200-210页

作者： Cenyu Yang Chuanfang Chen Qiufeng Ma longfei wu Tao Song Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 P. R. China Graduate University of Chinese Academy of Sciences Beijing 100049 P. R. China France-China Bio-Mineralization and Nano-Structures Laboratory Beoing 1 00193 P. R. China Laboratoire de Chimie Bacterienne UPR9043 Universite de la Mediterranee lnstitut de Microbiologie de la Mediterranee CNRS F-13402 Marseille Cedex 20 France

Magnetotactic Bacteria （MTB） propel themselves by rotating their flagella and swim along the magnetic field lines. To analyze the motion of MTB, MTB magneto-ovoid strain MO-1 cells, each with two bundles of flagella, were taken as research object. The six-degrees-of-freedom （6-DoF） dynamic model of MO-1 was established based on the Newton-Euler dynamic equations. In particular, the interaction between the flagellum and fluid was considered by the resistive force theory. The simulated motion trajectory of MTB was found to consist of two kinds of helices： small helices restilting from the imbalance of force due to flagellar rotation, and large helices arising from the different directions of the rotation axis of the cell body and the propulsion axis of the flagellum. The motion behaviours of MTB in various magnetic fields were studied, and the simulation results agree well with the experiment results. In addition, the rotation frequency of the flagella was estimated at 1100 Hz, which is consistent with the average rotation rate for Na^＋-driven flagellar motors. The included angle of the magnetosome chain was predicted at 40° that is located within 20° to 60° range of the observed results. The results indicate the correctness of the dynamic model, which may aid research on the operation and control of MTB-propelled micro-actuators. Meanwhile, the motion behaviours of MTB may inspire the development of micro-robots with new driving mechanisms.

关键词： magnetotactic bacteria dynamic model resistive force theory motion mechanism

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飞机主起舱门收放作动筒支架裂纹故障分析

机械工程师 2025年第1期 153-156页

作者：吴龙飞郭辉魏栋王娟中航飞机起落架有限责任公司陕西汉中723200

飞机主起舱门收放作动筒由作动筒、拉杆、支架等组成,实现开关主起落架舱门、防止气流吸开舱门的功能,其中支架是主起落架舱门开启、关闭的传动部件,在交变载荷下,其耳片部位受拉、压载荷,肋板与圆柱上端面的相贯处因应力集中或强度不... 详细信息

飞机主起舱门收放作动筒由作动筒、拉杆、支架等组成,实现开关主起落架舱门、防止气流吸开舱门的功能,其中支架是主起落架舱门开启、关闭的传动部件,在交变载荷下,其耳片部位受拉、压载荷,肋板与圆柱上端面的相贯处因应力集中或强度不足易产生裂纹、裂纹失稳和裂纹扩展。文中对支架工况进行了应力云图分析,揭示了零件肋板与柱面相交处为薄弱部位,并对支架裂纹建立了故障树,通过设计、制造、使用的3个方面、9个底事件,确定了支架肋板部位最小极限余量不足、加工后肋板局部壁厚偏小是导致支架在工作中产生裂纹萌生和扩展的主要原因。为了进一步方便此类故障的分析和排查,可对主起舱门收放作动筒支架裂纹故障建立故障树,健全故障排除方案,编写飞机起落架服务保障手册,建立信息共享的起落架资源库。

关键词：主起舱门收放作动筒支架肋板裂纹交变载荷故障树故障分析

A blockchain based privacy-preserving federated learning scheme for Internet of Vehicles

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Digital Communications and Networks 2024年第1期10卷 126-134页

作者： Naiyu Wang Wenti Yang Xiaodong Wang longfei wu Zhitao Guan Xiaojiang Du Mohsen Guizani School of Control and Computer Engineering North China Electric Power UniversityChina Department of Mathematics&Computer Science Fayetteville State UniversityFayettevilleNCUSA Department of Electrical and Computer Engineering Stevens Institute of TechnologyHobokenNJ07030USA Department of Computer Science and Engineering Qatar UniversityDohaQatar

The application of artificial intelligence technology in Internet of Vehicles(lov)has attracted great research interests with the goal of enabling smart transportation and traffic ***,concerns have been raised over the security and privacy of the tons of traffic and vehicle *** this regard,Federated Learning(FL)with privacy protection features is considered a highly promising ***,in the FL process,the server side may take advantage of its dominant role in model aggregation to steal sensitive information of users,while the client side may also upload malicious data to compromise the training of the global *** existing privacy-preserving FL schemes in IoV fail to deal with threats from both of these two sides at the same *** this paper,we propose a Blockchain based Privacy-preserving Federated Learning scheme named BPFL,which uses blockchain as the underlying distributed framework of *** improve the Multi-Krum technology and combine it with the homomorphic encryption to achieve ciphertext-level model aggregation and model filtering,which can enable the verifiability of the local models while achieving ***,we develop a reputation-based incentive mechanism to encourage users in IoV to actively participate in the federated learning and to practice *** security analysis and performance evaluations are conducted to show that the proposed scheme can meet the security requirements and improve the performance of the FL model.

关键词： Federated learning Blockchain Privacy-preservation Homomorphic encryption Internetof vehicles

dBrms1 Acts as a Positive Regulator of Notch Signaling in Drosophila Wing

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Journal of Genetics and Genomics 2014年第6期41卷 317-325页

作者： Qinghai Zhang Yan Zhang longfei wu Yongfei Yang Xue Li Lei Gao Xiaomeng Hou Yihui wu Guoli Hou Zhouhua Li Xinhua Lin State Key Laboratory of Biomembrane and Membrane Biotechnology Institute of Zoology Chinese Academy of Sciences University of Chinese Academy of Sciences School of Life Sciences Capital Normal University Division of Developmental Biology Cincinnati Children’s Hospital Medical Center

The highly conserved Notch signaling is precisely regulated at different steps in a series of developmental events. However, little is known about the regulation of Notch receptor at transcriptional level. Here, we demonstrate that dBrmsl is involved in regulating Notch signaling in Drosophila wing. We show that knockdown of dBrmsl by RNA interference （RNAi） in wing disc suppresses the expression of Notch signaling target genes wingless （wg）, cut and Enhancer of split m8 [E（spl）m8]. Consistently, the levels of Wg and Cut are reduced in the dBrmsl mutant clones. Importantly, loss of dBrmsl leads to significant reduction of Notch proteins. Furthermore, depletion of dBrmsl results in apparent downregulation of Notch transcription in the wing disc. Moreover, we find that dBrmsl is functionally conserved with human Breast cancer metastasis suppressor 1 like （hBRMSIL） in the modulation of Notch signaling. Taken together, our data provide important insights into the biological function of dBrmsl in regulating Notch signaling.

关键词： Notch signaling Drosophila Wing disc Notch transcription dBrmsl

基于时机理论护理干预对提升自体动静脉内瘘吻合术患者自我管理能力的效果研究

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西南医科大学学报 2025年第1期48卷 92-96页

作者：张翠程孝雨张龙飞吴龙飞闫伟佳袁梦珂王虹雨高丙耀平顶山市第二人民医院(平顶山学院第二附属医院)肾病科平顶山467000 平顶山市第二人民医院(平顶山学院第二附属医院)血液净化室平顶山467000

目的探究基于时机理论的护理干预对自体动静脉内瘘吻合术患者自我管理能力的影响,并评估其效果。方法2022年10月至2024年1月在本院就诊并实施自体动静脉内瘘吻合术行血液透析治疗的患者130例,运用了数字随机表法分为研究组与对照组,每... 详细信息

目的探究基于时机理论的护理干预对自体动静脉内瘘吻合术患者自我管理能力的影响,并评估其效果。方法2022年10月至2024年1月在本院就诊并实施自体动静脉内瘘吻合术行血液透析治疗的患者130例,运用了数字随机表法分为研究组与对照组,每组65例。对照组在住院期间将接受常规护理干预,研究组实施基于时机理论的护理干预。采用SPSS 26.0软件进行统计分析,两组患者自我管理行为、生活质量采用独立样本t检验,并发症发生情况采用χ^(2)检验。结果两组患者干预前自我管理行为得分、生活质量组内比较,差异无统计学意义(P>0.05);干预后研究组自我管理行为、生活质量等条目评分均高于对照组(P<0.05),并发症发生率低于对照组(P<0.05)。结论基于时机理论的护理干预对于增强自体动静脉内瘘吻合术患者的自我管理能力有明显效果,可为临床应用提供参考。

关键词：时机理论护理干预自体动静脉内瘘吻合术自我管理能力

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Evaluation of host resistance and fungicide application as tools for the management of root rot of field pea caused by Aphanomyces euteiches

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The Crop Journal 2019年第1期7卷 38-48页

作者： longfei wu Kan-Fa Chang Sheau-Fang Hwang Robert Conner Rudolph Fredua-Agyeman David Feindel Stephen E.Strelkov Department of Agricultural Food and Nutritional Science University of Alberta Crop Diversification Centre North Alberta Agriculture and Forestry Agriculture and Agri-Food Canada Morden Research and Development Centre

Aphanomyces root rot(ARR) of field pea(Pisum sativum), caused by Aphanomyces euteiches, can cause severe root damage, wilting, and large yield losses under wet soil conditions. To identify ways to manage this disease, the effect of A. euteiches inoculum density on field pea was studied under greenhouse and field conditions in 2015 and 2016. Increases in inoculum density reduced seedling emergence, root nodulation, and plant vigor, and resulted in increased root rot severity in both field and greenhouse tests. Seed treatments with the fungicides Apron Advance(thiabendazole + fludioxonil + metalaxyl) + Vibrance(difenoconazole + metalaxylM + sedaxane), INTEGO Solo(ethaboxam), BAS 516F(boscalid + pyraclostrobin), BAS 720F(metalaxyl + pyraclostrobin + fluxapyroxad), and BAS 516F + BAS 720F(3:1) were evaluated for their efficacy against ARR. All seed treatments except Apron Advance + Vibrance reduced root rot severity under controlled conditions. BAS 516F, BAS 720F and INTEGO Solo improved plant vigor and all treatments reduced seedling blight to varying degrees under greenhouse conditions, but not in the field. A collection of 22 pea genotypes was evaluated for resistance to root rot in field plot experiments. Line 00–2067 showed the least severe root rot symptoms,whereas ‘Spring D' showed the lowest reduction in yield. The results suggest that there may be an opportunity to combine partial host resistance and fungicidal seed treatments to adequately manage ARR of field pea.

关键词： Aphanomyces euteiches Field pea Fungicides Inoculum density Resistance

Direct Ischemic Postconditioning Following Stroke Thrombectomy:A Promising Therapy for Reperfusion Injury

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Neuroscience Bulletin 2024年第7期40卷 1017-1020页

作者： Jing Wang Lu Yang longfei wu Sijie Li Changhong Ren Yuchuan Ding Ming Wei Xunming Ji Wenbo Zhao Department of Neurology Xuanwu HospitalCapital Medical UniversityBeijing 100053China Department of Emergency Xuanwu HospitalCapital Medical UniversityBeijing 100053China Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine Xuanwu HospitalCapital Medical UniversityBeijing 100053China Department of Neurosurgery Wayne State University School of MedicineDetroitMI48201USA Beijing Institute for Brain Disorders Capital Medical UniversityBeijing 100069China Department of Neurosurgery Tianjin Huanhu HospitalTianjin 300222China Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijing 100053China

Recanalization of occluded vessels and timely reperfusion are the primary therapies for acute ischemic stroke(AIS),with endovascular thrombectomy proven as the most effective therapy for large-vessel recanalization and improved outcomes of AIS ***,despite a high recanalization rate of 90% or even higher,the rate of 3-month functional independence is approximately 50%,while mortality remains around 15%[1].

关键词： mortality acute Therapy

细菌鞭毛推进器复杂的蛋白组成和精致的空间结构

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科学通报 2014年第20期59卷 1912-1918页

作者：张维佳李颖 wu longfei Aix-Marseille Universite(AMU) Labortoire de Chimie BacterienneInstitut de Microbiologie de la MediterraneeCentre national de la recherche scientifiqueMarseille 13402 Marseille cedex 20France 中国农业大学生物学院农业生物技术国家重点实验室北京100193 Laboratioire International Associe de Bio-mineralisation et Nanostructure(LIA-BioMNSL) Laboratoire de Chimie BacterienneInstitut de Microbiologie de la MediterraneeCentre national de la recherche scientifiqueMarseille 13402 Marseille cedex 20France

鞭毛推进游动是细菌寻找最佳营养源的有效运动方式之一.细菌鞭毛由鞭毛基体、鞭毛钩和鞭毛丝3部分构成,该结构的合成和组装由50多个基因参与,是在精密的时、空调控下进行的生物过程.对鞭毛结构和功能的认知主要源自对几个常见模式细菌... 详细信息

鞭毛推进游动是细菌寻找最佳营养源的有效运动方式之一.细菌鞭毛由鞭毛基体、鞭毛钩和鞭毛丝3部分构成,该结构的合成和组装由50多个基因参与,是在精密的时、空调控下进行的生物过程.对鞭毛结构和功能的认知主要源自对几个常见模式细菌的研究.近期,针对海洋趋磁细菌的研究结果揭示了一种新型鞭毛运动器官复杂的蛋白组成及其高度精致的空间结构.12种鞭毛蛋白经不同程度的糖基化修饰后装配成7根鞭毛,并与24根纤毛在一个鞭毛鞘中排列成7个相互交织的六角形阵列.目前,这种鞭毛结构只在海洋趋磁球菌中观察到,推测是这类细菌为了适应海洋沉积物生境,经生态分化演变的结果.这种精巧的结构对现有的鞭毛组装和运行机制模型提出了挑战,并将推进今后对细菌表面附属物的装配与演化的深入研究.

关键词：细菌鞭毛鞭毛蛋白纤毛鞘空间排列