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锂离子电池分数阶模型的多参数在线辨识方法

电源学报 2024年第S1期22卷 78-88页

作者：侯爽冬雷杨耕贾彦博张殷耀马宏伟中国电源学会北京理工大学自动化学院清华大学自动化系

锂离子电池分数阶模型由于含有表征老化机理的参数，被用于电池老化研究并期望据此实现在线的电池老化过程探究。在电池的有限使用工况和产品级检测条件下实现对该模型尽可能多的老化参数的在线辨识，将有助于该模型的在线应用。基于此... 详细信息

锂离子电池分数阶模型由于含有表征老化机理的参数，被用于电池老化研究并期望据此实现在线的电池老化过程探究。在电池的有限使用工况和产品级检测条件下实现对该模型尽可能多的老化参数的在线辨识，将有助于该模型的在线应用。基于此，提出1种基于反向传播神经网络的多参数在线辨识方法。首先通过分析典型工况下参数灵敏度确定在线辨识的参数集，然后基于电池老化规律设计网络以及网络训练算法以提高辨识速度和准确性，同时设计验证方法以保证辨识参数的收敛性，仿真和实验结果验证在线辨识方法的辨识速度和准确性。

关键词：锂离子电池参数辨识反向传播神经网络

Keep Healthcare Workers Safe:Application of Teleoperated Robot in Isolation Ward for COVID‑19 Prevention and Control

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Chinese Journal of Mechanical Engineering 2020年第3期33卷 1-4页

作者： geng yang Honghao Lv Zhiyu Zhang Liu yang Jia Deng Siqi You Juan Du Huayong yang State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Department of Gastroenterology First Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310003China.

At the time of writing,the coronavirus disease(COVID-19)has affected 212 countries and territories across the *** to the world health organization(WHO),a total number of 4,735,622 confirmed cases,including 316,289 deaths was reported[1].In the fight against COVID-19,nurses,doctors,and other healthcare workers are in the front line of the battle bearing the higher risk of infection[2].The International Council of Nurses(ICN)gathered further information to suggest that more than 90,000 healthcare workers have been infected worldwide[3].Personal protective equipment(PPE)shortage is one of the key factors increasing the infection risk for the medical ***,finding alternative ways to lower the infection risk has become an urgent problem to be solved.

关键词： Robot COV nurse

Imidacloprid-induced transference effect on some elements in rice plants and the brown planthopper Nilaparvata lugens （Hemiptera： Delphacidae）

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Insect Science 2011年第3期18卷 289-297页

作者： Samer Azzam Fan yang Jin-Cai Wu Jin geng Guo-Qing yang School of Plant Protection Yangzhou University Yangzhou Jiangsu Province China

The widespread use ofimidacloprid against insect pests has not only increased the rate of the development of target pest resistance but has also resulted in various negative effects on rice plants and Nilaparvata lugens resurgence. However, the effect of imidacloprid on elements in rice plants and the transference of these element changes between rice and N. lugens are currently poorly understood. The present study investigated changes ofCu, Fe, Mn, Zn, Ca, K, Mg and Na contents in rice plants following imidacloprid foliar sprays in the adult female ofN./ugens that develops from nymphs that feed on treated plants and honeydew produced by females. The results indicated that imidacloprid foliar spray significantly increased Fe and K contents in leaf sheaths. Generally, Fe, Mn, K and Na contents in leaf blades were noticeably decreased, but Ca contents in leaf blades for ! 0 and 30 mg/kg imidacloprid treatments were significantly increased. The contents of most elements except K and Mg in the adult females and honeydew were significantly elevated. Multivariate statistical analysis showed that Fe, Mn and Na in leaf blades and Fe and Mn in leaf sheaths could be proportionally transferred to N. lugens. The relationship between most elements in adult female bodies and in the honeydew showed a positive correlation coefficient. There were significant differences in the contents of some elements in rice plants and N. lugens from different regions.

关键词： elements imidacloprid Nilaparvata lugens rice plant transference effect

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TC4钛合金电致塑性本构方程建立

塑性工程学报 2024年第3期31卷 91-99页

作者：翟瑞雪吴庚洋乔铮金卓翰李书宇张正义燕山大学先进锻压技术与科学重点实验室河北秦皇岛066004 燕山大学机械工程学院河北秦皇岛066004

采用自行设计的绝缘夹具对TC4钛合金板材进行了电致塑性单向拉伸试验。基于对照试验的方法,以无脉冲电流且不同温度条件作为参照,与同等温度条件下脉冲电流加热情况进行对比,以探索电流参数对TC4钛合金电致塑性效应和力学性能的影响规... 详细信息

采用自行设计的绝缘夹具对TC4钛合金板材进行了电致塑性单向拉伸试验。基于对照试验的方法,以无脉冲电流且不同温度条件作为参照,与同等温度条件下脉冲电流加热情况进行对比,以探索电流参数对TC4钛合金电致塑性效应和力学性能的影响规律。结果表明:在试验研究范围内,脉冲电流的占空比主要影响材料的温度变化,脉冲电流密度对TC4钛合金的电致塑性起主导地位,脉冲电流作用下的TC4钛合金材料抗拉强度大幅下降,塑性提高。基于Johnson-Cook模型和Arrhenius方程建立了耦合温度和脉冲电流密度的TC4钛合金电致塑性本构方程,并进行了验证。

关键词： TC4钛合金电致塑性效应本构方程应力-应变关系

EKAES:AN EFFICIENT KEY AGREEMENT AND ENCRYPTION SCHEME FOR WIRELESS SENSOR NETWORKS

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Journal of Electronics(China) 2008年第4期25卷 495-502页

作者： Cheng Hongbing yang geng College of Computer Nanjing University of Posts ＆ Telecommunications Nanjing 210003 China College of Information Engineering Jiangsu Radio ＆ TV University Nanjing 210017 China

Wireless sensor networks are being deployed for some practical applications and their se-curity has received considerable *** is an important challenge to find out suitable keyagreement and encryption scheme for wireless sensor networks due to limitations of the power,com-putation capability and storage *** this paper,an efficient key agreement and encryptionscheme for wireless sensor networks is *** of analysis and simulations among the pro-posed scheme and other schemes show that the proposed scheme has some advantages in terms ofenergy consumption,computation requirement,storage requirement and security.

关键词： Wireless sensor networks Network security Key agreement Encryption

AN INTELLIGENT METHOD FOR REAL-TIME DETECTION OF DDOS ATTACK BASED ON FUZZY LOGIC

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Journal of Electronics(China) 2008年第4期25卷 511-518页

作者： Wang Jiangtao yang geng College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China Research Institute of Computer Technology Nanjing University of Posts and Telecommunications Nanjing 210003 China

The paper puts forward a variance-time plots method based on slide-window mechanism tocalculate the Hurst parameter to detect Distribute Denial of Service(DDoS)attack in real *** fuzzy logic technology that can adjust itself dynamically under the fuzzy rules,an intelligent DDoSjudgment mechanism is *** new method calculates the Hurst parameter quickly and detectsDDoS attack in real *** comparing the detecting technologies based on statistics andfeature-packet respectively under different experiments,it is found that the new method can identifythe change of the Hurst parameter resulting from DDoS attack traffic with different intensities,andintelligently judge DDoS attack self-adaptively in real time.

关键词： Abnormal traffic Distribute Denial of Service (DDoS) Real-time detection Intelligent control Fuzzy logic

Laser direct writing of Ga_(2)O_(3)/liquid metal-based flexible humidity sensors

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光电进展(英文) 2023年第7期6卷 30-39页

作者： Songya Cui Yuyao Lu Depeng Kong Huayu Luo Liang Peng geng yang Huayong yang Kaichen Xu State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310030China School of Information and Electrical Engineering Hangzhou City UniversityHangzhou 310015China

Flexible and wearable humidity sensors play a vital role in daily point-of-care diagnosis and noncontact human-machine ***,achieving a facile and high-speed fabrication approach to realizing flexible humidity sensors remains a *** this work,a wearable capacitive-type Ga_(2)O_(3)/liquid metal-based humidity sensor is demonstrated by a one-step laser direct writing *** to the photothermal effect of laser,the Ga_(2)O_(3)-wrapped liquid metal particles can be selectively sintered and converted from insulative to conductive traces with a resistivity of 0.19Ω·cm,while the untreated regions serve as active sensing layers in response to moisture *** 95%relative humidity,the humidity sensor displays a highly stable performance along with rapid response and recover *** these superior properties,the Ga_(2)O_(3)/liquid metal-based humidity sensor is able to monitor human respiration rate,as well as skin moisture of the palm under different physiological states for healthcare monitoring.

关键词： laser direct writing liquid metal humidity sensors flexible electronics wearable sensors

An Authenticated Identity-Based Key Establishment and Encryption Scheme for Wireless Sensor Networks

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The Journal of China Universities of Posts and Telecommunications 2006年第2期13卷 31-38页

作者： CHENG Hong-bing yang geng WANG Jiang-tao HUANG Xiao College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 P.R. China College of Information Engineering Jiangsu Radio and TV University Nanjing 210017 P.R. China

Security of wireless sensor networks has received considerable attention. It is a critical challenge to find out suitable encryption schemes for wireless sensor networks due to limitations of power, computation capability and storage resources of these networks. Many encryption schemes based on asymmetric and symmetric have been investigated. In this paper, we present an authenticated identity-based key encryption scheme for wireless sensor networks. We first review briefly about identity-based encryption and decryption, particularly, the Boneh-Franklin algorithms, then describe an authenticated identity-based key encryption scheme based on Boneh-Franklin algorithms, and finally show the integrity of our scheme and discuss its efficiency and security by comparing it with other asymmetric and symmetric encryption schemes.

关键词： identity-based encryption scheme network security boneh-franklin algorithms wireless sensor network

骨质疏松性骨折患者骨代谢指标的变化及其临床意义

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中华实验外科杂志 2024年第7期41卷 1601-1604页

作者：耿洋田科席俊伟高山驻马店市中心医院关节外科驻马店463000 郑州大学第一附属医院骨科郑州450052

目的探讨骨质疏松性骨折患者骨代谢指标的变化及其临床意义。方法选取驻马店市中心医院和郑州大学第一附属医院2022年12月至2023年5月收治的65例绝经后骨质疏松性骨折患者作为研究对象, 选取同期65例绝经后骨质疏松未骨折的患者作为对... 详细信息

目的探讨骨质疏松性骨折患者骨代谢指标的变化及其临床意义。方法选取驻马店市中心医院和郑州大学第一附属医院2022年12月至2023年5月收治的65例绝经后骨质疏松性骨折患者作为研究对象, 选取同期65例绝经后骨质疏松未骨折的患者作为对照。清晨抽取静脉血, 采用化学发光法和酶联免疫吸附实验测定两组患者血清中25-羟维生素D(25-OH-VitD)、骨碱性磷酸酶(BLAP)、骨钙素(OC)、Ⅰ型胶原羧基末端肽(CTx)、Ⅰ型前胶原氨基端前肽(PINP)、甲状旁腺激素(PTH)、胰岛素样生长因子-1(IGF-1)和血清钙磷值等指标变化。分析骨折与患者血清代谢指标的相关性, 组间计量数据比较采用t检验。结果骨质疏松症患者股骨颈、股骨大转子、腰椎和Ward三角区骨密度[(0.53±0.03)、(0.51±0.04)、(0.59±0.04)、(0.60±0.11) g/cm^(2)]明显高于骨质疏松性骨折患者[(0.48±0.04)、(0.47±0.05)、(0.52±0.04)、(0.50±0.05) g/cm^(2)], 差异有统计学意义(t=6.628、5.670、10.600、6.479, P<0.05)。骨质疏松症患者25-OH-VitD和IGF-1水平[(25.91±1.85)、(164.95±14.16) ng/ml]明显高于骨质疏松性骨折患者[(19.05±2.06)、(118.02±14.13) ng/ml], 差异有统计学意义(t=19.950、18.770, P<0.05)。骨质疏松症患者BLAP、CTx、PINP、PTH、OC和血磷水平[(3.09±0.99)、(0.29±0.04)、(35.38±5.17)、(48.97±8.81)、(14.54±1.47)、(1.11±0.08) ng/ml]明显低于骨质疏松性骨折患者[(4.84±1.44)、(0.55±0.10)、(51.71±8.80)、(57.49±7.18)、(21.54±4.05)、(0.97±0.04) ng/ml], 差异有统计学意义(t=8.082、19.040、12.900、6.046、13.090、12.950, P<0.05)。BLAP、CTx、PINP、PTH、OC和血清磷水平与骨质疏松性骨折呈正相关(B=0.054、0.068、0.121、0.102、0.102、0.204, P<0.05)。25-OH-VitD和IGF-1水平与骨质疏松性骨折呈负相关(B=-0.241、-0.312, P<0.05)。结论骨代谢生化标志物25-OH-VitD、BALP、CTx、PINP、PTH、OC、IGF-1和血清磷与骨质疏松性骨折明显相关, 是骨质疏松性骨折的危险因素。

关键词：骨质疏松性骨折骨代谢骨碱性磷酸酶胰岛素样生长因子-1