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makeTwin:A reference architecture for digital twin software platform

Chinese Journal of Aeronautics 2024年第1期37卷 1-18页

作者： Fei TAO Xuemin SUN Jiangfeng CHENG Yonghuai ZHU weiran liu Yong WANG Hui XU Tianliang HU Xiaojun liu Tingyu liu Zheng SUN Jun XU Jinsong BAO Feng XIANG Xiaohui JIN Digital Twin International Research Center International Research Institute for Multidisciplinary ScienceBeihang UniversityBeijing 100191China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China Institute of Advanced Manufacturing and Intelligent Technology Beijing University of TechnologyBeijing 100124China RIAMB(Beijing)Technology Development Co Ltd(R.T.D.)Beijing 100120China School of Mechanical Engineering Shandong UniversityJinan 250061China School of Mechanical Engineering Southeast UniversityNanjing 211189China School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China College of Mechanical Engineering Donghua UniversityShanghai 201620China School of Machinery and Automation Wuhan University of Science and TechnologyWuhan 430081China Beijing Aero-top Hi-tech Co LtdBeijing 100176China

Digital twin is currently undergoing a significant transformation from the conceptual and theoretical research phase to the implementation and application ***,a universally adaptable research and development platform for digital twin is critically needed to meet the development ***,a publicly accessible simulation,testing,and validation platform which can support digital twin model building,data processing,algorithm design,configuration,etc.,is urgently required for ***,for developers from the industry,a lowcode development platform that can offer a customizable suite of functions such as model creation,data management,protocol configuration,and visualization is urgently ***,for enterprise users,there is a lack of an application management platform that can be configured and migrated for various application scenarios,functions,and ***,based on the system research of digital twin theories and key technologies by the authors(such as the five-dimension digital twin model,digital twin modeling and digital twin data theory,digital twin standards,and so on),a digital twin software platform reference architecture,namely make Twin,is proposed and designed,as well as its ten core *** workflow of the make Twin and the interaction mechanisms among its core functions are ***,a digital twin application system for a chemical fiber textile shop floor(CFTS)which was developed according to make Twin,is introduced,which validates the proposed reference architecture.

关键词： Digital twin Digital twin software platform Industrial software makeTwin Reference architecture

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Revocable Hierarchical Identity-Based Broadcast Encryption

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Tsinghua Science and Technology 2018年第5期23卷 539-549页

作者： Dawei Li Jianwei liu Zongyang Zhang Qianhong Wu weiran liu School of Electronic and Information Engineering Beihang University Beijing 100191 China

Hierarchical Identity-Based Broadcast Encryption （HIBBE） organizes users into a tree-like structure, and it allows users to delegate their decryption ability to subordinates and enable encryption to any subset of users while only intended users can decrypt. However, current HIBBE schemes do not support efficient revocation of private keys. Here, a new primitive called Revocable Hierarchical Identity-Based Broadcast Encryption （RHIBBE） is formalized that allows revocation of the HIBBE. Ciphertext indistinguishability is defined against the selectively Bounded Revocable Identity-Vector-Set and Chosen-Plaintext Attack （IND-sBRIVS-CPA）. An IND-sBRIVS-CPA secure RHIBBE scheme is constructed with efficient revocation on prime-order bilinear groups. The unbounded version of the scheme is also shown to be secure but a little weaker than the former under the decisional n-Weak Bilinear Diffie-Hellman inversion assumption.

关键词： Revocable Hierarchical Identity-Based Broadcast Encryption (RHIBBE) revocation provable security

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A 5M Synchronization Mechanism for Digital Twin Shop-Floor

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Chinese Journal of Mechanical Engineering 2023年第6期36卷 105-126页

作者： weiran liu Jiangfeng Cheng Zhiwen Wen Xiaofu Zou Zhaozong Wang Hongting liu Fei Tao School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China Xi’an Precision Machinery Research Institute Xi’an 710077China Institute of Artificial Intelligence Beihang UniversityBeijing 100191China Digital Twin International Research Center International Research Institute for Multidisciplinary ScienceBeihang UniversityBeijing 100191China

In recent years,as a promising way to realize digital transformation,digital twin shop-floor(DTS)plays an impor-tant role in smart *** core feature of DTS is the *** to implement and maintain the synchronization is critical for ***,there is still a lack of a common definition for synchronization in ***,a systematic synchronization mechanism for DTS is strongly *** paper first summarizes the defi-nition and requirements of synchronization in DTS,to clarify the understanding of synchronization in ***,a 5M synchronization mechanism for DTS is proposed,where 5M refers to multi-system data,multi-fidelity model,multi-resource state,multi-level state,and multi-stage *** a bottom-up synchronization mechanism,5M synchronization mechanism for DTS has the potential to support DTS to achieve and maintain physical-virtual state synchronization,and to realize operation synchronization of *** implementation methods of 5M synchronization mechanism for DTS are also ***,the proposed synchronization mechanism is validated in a digital twin satellite assembly shop-floor,which proves the effectiveness and feasibility of the mechanism.

关键词： Digital twin Digital twin shop-floor Synchronization in digital twin shop-floor Synchronization mechanism Satellite assembly shop-floor

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基于PARP-1/AIF信号通路分析针刺对急性缺血性卒中大鼠脑血流及行为学恢复的影响

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西部医学 2024年第6期36卷 807-813页

作者：张秀清刘蔚然王辉刘斌韩林唐山市人民医院河北唐山063000 唐山市开平医院河北唐山063000 华北理工大学附属医院河北唐山063000

目的基于PARP-1/AIF信号通路分析针刺对急性缺血性卒中大鼠脑血流及行为学恢复的影响。方法将40只健康成年雄性SPF级大鼠分为Sham组、模型组、针刺组及针刺+PJ34组,每组10只,除Sham组外均建立动物模型,针刺组及针刺+PJ34组大鼠均进行针... 详细信息

目的基于PARP-1/AIF信号通路分析针刺对急性缺血性卒中大鼠脑血流及行为学恢复的影响。方法将40只健康成年雄性SPF级大鼠分为Sham组、模型组、针刺组及针刺+PJ34组,每组10只,除Sham组外均建立动物模型,针刺组及针刺+PJ34组大鼠均进行针刺治疗,针刺+PJ34组以10μmoL/g腹腔注射多聚腺苷二磷酸核糖转移酶-1(PARP-1)抑制剂PJ34,Sham组及模型组不进行针刺干预,均注射相同体积的0.9%生理盐水。11分制单盲评分评价建模后、干预第1、2、3天行为学评分;多普勒仪探头记录软脑膜微循环血流量;HE染色观察脑组织病理形态;TUNEL法检测各组神经细胞凋亡率;免疫组化检测Bax、Bcl-2阳性表达;免疫印迹检测PARP-1、凋亡诱导因子(AIF)蛋白含量。结果建模后,模型组、针刺组及针刺+PJ34组的行为学评分均升高,与Sham组比较差异有统计学意义(P<0.05),干预第1、2、3天时与模型组相比,针刺组行为学评分均降低(P<0.05),针刺+PJ34组上述时间行为学评分均降低,与针刺组比较差异有统计学意义(P<0.05);Sham组、模型组、针刺组及针刺+PJ34组的软脑膜微循环血流量分别为(756.35±102.33)、(233.06±45.17)、(416.40±63.55)、(560.80±72.04)AU,组间比较差异均有统计学意义(F=90.390,P<0.001);HE染色示Sham组大鼠脑组织及神经细胞排列整齐,模型组脑组织紊乱且神经细胞数目减少,针刺组及针刺+OJ34组神经细胞存活较多,排列整齐;Sham组、模型组、针刺组及针刺+PJ34组的神经细胞凋亡率分别为(3.30%±0.21%)、(30.04%±4.52%)、(16.30%±2.25%)、(11.69%±1.33%),组间比较差异均有统计学意义(F=90.390,P<0.001);与Sham组比较,模型组大鼠Bax阳性细胞数降低,Bcl-2阳性细胞数、PARP-1、AIF蛋白升高(均P<0.05),与模型组相比,针刺组及针刺+PJ34组的Bax阳性细胞数及Bcl-2阳性细胞数、PARP-1、AIF蛋白升高(均P<0.05),针刺组及针刺+PJ34组上述指标比较差异均有统计学意义(P<0.05)。结论急性缺血性卒中大鼠采用针刺干预后能够改善行为学,增加脑血流灌溉的同时可通过调节细胞凋亡因子而减少神经细胞凋亡,研究机制可能与抑制PARP-1、AIF活性相关。

关键词：急性缺血性卒中针刺 PARP-1抑制剂PJ34 脑血流行为学

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Security and Privacy Issues in Electronic Health Network

引用

Wuhan University Journal of Natural Sciences 2013年第6期18卷 523-529页

作者： MA Yan liu Jianwei liu weiran School of Electronic and Information Engineering Beihang University

Electronic health network （EHN） is an information system providing functions involved in e-health. In this paper, we devise mechanisms covering three important security and privacy issues of EHN including trust management, privacy preserving, and data sharing. First, we propose an authenticated key agreement scheme based on hierarchical identity-based signature （HIBS）. We abstract a hierarchical architecture from the social network architecture of EHN. To support large-scale scenarios, we introduce a virtual signature generation phase into traditional HIBS, thus our scheme will be efficient even the depth is quite big. Second, we propose a fast data searching scheme based on symmetric searchable encryption （SSE）. To improve the searching efficiency, we introduce a two-level cache structure into the traditional SSE. Third, we propose an access control scheme based on hierarchical identity- based encryption （HIBE）. To make it a fine-grained scheme, we organize the data owner＇s file in hierarchy and introduce a virtual key generation phase to traditional HIBE. Also, the scheme can provide delegation and revocation functions easily, Besides, our schemes guarantee known-key secrecy, forward secrecy, and antidirection secrecy and possess the resistance capability to collude-attack. Evaluation results show that our scheme indeed achieves the security and efficiency.

关键词： electronic health network (EHN) trust management privacy preserving data sharing

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Relationship between the unique microstructures and behaviors of high-entropy alloys

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1350-1363页

作者： Yaqi Wu Peter KLiaw Ruixuan Li weiran Zhang Guihong Geng Xuehui Yan Guiqun liu Yong Zhang State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN 37996USA Xi’an Rare Metal Materials Institute Co.Ltd. Xi’an 710016China School of Materials Science and Engineering North Minzu UniversityYinchuan 750030China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China

High-entropy alloys(HEAs),which were introduced as a pioneering concept in 2004,have captured the keen interest of nu-merous ***,in this context,can be perceived as representing disorder and *** contrast,elemental composi-tions within alloy systems occupy specific structural sites in space,a concept referred to as *** accordance with Shannon entropy,structure is analogous to ***,the arrangement of atoms within a material,termed its structure,plays a pivotal role in dictating its *** addition to expanding the array of options for alloy composites,HEAs afford ample opportunities for diverse structural *** profound influence of distinct structural features on the exceptional behaviors of alloys is underscored by numer-ous *** features include remarkably high fracture strength with excellent ductility,antiballistic capability,exceptional radi-ation resistance,and corrosion *** this paper,we delve into various unique material structures and properties while elucidating the intricate relationship between structure and performance.

关键词： high-entropy alloys unique microstructure special properties alloy design

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Survey on key security technologies for space information networks

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Journal of Communications and Information Networks 2016年第1期1卷 72-85页

作者： liu Jianwei liu weiran WU Qianhong LI Dawei CHEN Shigang School of Electronic and Information Engineering Beihang UniversityBeijing 100191China Department of Computer and Information of Science and Engineering University of FloridaGainesville FL 32611USA

SIN(Space Information Network)is expected to play an increasing role in providing real-time,flexible,and integrated communication and data transmission services in an efficient ***,SIN has been widely developed for position navigation,environment monitor,traffic management,counter-terrorism,***,security is a major concern in SIN,since the satellites,spacecrafts,and aircrafts are susceptible to a variety of traditional/specific network-based attacks,including eavesdropping,session hijacking,and illegal *** network architecture and security issues of SIN were *** security requirements were discussed that should be considered when designing *** existing solutions proposed to meet these requirements were *** key challenges and key technologies that still require extensive research and development for securing SIN were indentifed.

关键词： space information network network architecture data encryption key management access authentication

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一种改进的动态口令生成算法及重同步方案

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计算机研究与发展 2012年第12期49卷 2611-2618页

作者：刘潇刘巍然李为宇北京航空航天大学电子信息工程学院北京100191

依据HTOP认证架构,结合密钥生成算法、EHMAC算法和动态截短函数设计了一种改进的动态口令生成算法EOTP,并利用该算法设计了能够满足身份认证系统基本要求的认证协议.此外,为了解决失步问题,提出基于窗口机制的重同步方案,将其分为窗口... 详细信息

依据HTOP认证架构,结合密钥生成算法、EHMAC算法和动态截短函数设计了一种改进的动态口令生成算法EOTP,并利用该算法设计了能够满足身份认证系统基本要求的认证协议.此外,为了解决失步问题,提出基于窗口机制的重同步方案,将其分为窗口内和窗口外两种同步方式.最后,对所提算法和协议的性能及安全性进行了分析,该算法和协议执行速度快,易于通过令牌或智能卡硬件实现,能够有效抵抗蛮力攻击、口令窃取和截获/重放消息等攻击方式,具有很高的安全性.

关键词：动态口令杂凑函数认证协议重同步抵抗攻击

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A MULTIMODE CONICAL FEEDHORN IN 8MM WAVE BAND

A MULTIMODE CONICAL FEEDHORN IN 8MM WAVE BAND

引用

International Conference on Millimeter Wave and Far-Infrared Technology

作者： Lin Zhisheng Shun Changyong liu weiran Department of Electronics Zhongshan University

ISBN: (纸本)0879427175

＜正＞The primary feedorn of high efficiency is important in raising the gain and other performances of reflection mirror *** addition,it can be a radiation source of Gaussian wave beams in quasioptical *** create the highly efficient feedhorn,not only an axisymmetric radiation pattern in amplitude and phase,but also an axisymmetric Gaussian field distribution characteristic is required. In recent research of the MMW quasi-

关键词： Bands Conical

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基于电阻抗多模式检测芯片的体外热疗

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清华大学学报（自然科学版） 2016年第7期56卷 751-758页

作者：谢新武刘蔚然刘冉清华大学医学院生物医学工程系北京100084 军事医学科学院卫生装备研究所天津300161

热疗是继手术、化疗、放疗之后对癌症的一大治疗手段,但是目前其机理尚不明确,体外研究结论与临床应用尚有差距。为更好地研究在热应激/热疗过程中的细胞变化,该文构建了一套集成细胞电阻抗非标记动态检测、细胞形态动态记录、荧光标记... 详细信息

热疗是继手术、化疗、放疗之后对癌症的一大治疗手段,但是目前其机理尚不明确,体外研究结论与临床应用尚有差距。为更好地研究在热应激/热疗过程中的细胞变化,该文构建了一套集成细胞电阻抗非标记动态检测、细胞形态动态记录、荧光标记检测功能并且能够自动测控温度的微全分析系统,对其控温性能进行了仿真与实测检验,对细胞培养及增殖过程进行了非标记连续监测,并利用此实验系统进行了癌细胞在2种热疗条件下的动态多模式检测。实验结果表明:HeLa细胞在41℃,2h热疗作用下,阻抗呈现"V"型变化,形态快速收缩后又迅速恢复贴壁,荧光标记检测显示细胞活力无明显改变;而在2次55℃,2min脉冲式热疗作用下,细胞阻抗呈现"L"型变化,细胞杀伤效果明显。该系统将传统标记技术与非标记检测技术结合,可用于细胞热应激/热疗的相关研究。

关键词：细胞-基质电阻抗测量热疗芯片实验室多模式检测

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