With the continuous expansion of the Industrial Internet of Things(IIoT),more andmore organisations are placing large amounts of data in the cloud to reduce overheads.However,the channel between cloud servers and smar...With the continuous expansion of the Industrial Internet of Things(IIoT),more andmore organisations are placing large amounts of data in the cloud to reduce overheads.However,the channel between cloud servers and smart equipment is not trustworthy,so the issue of data authenticity needs to be addressed.The SM2 digital signature algorithm can provide an authentication mechanism for data to solve such problems.Unfortunately,it still suffers from the problem of key exposure.In order to address this concern,this study first introduces a key-insulated scheme,SM2-KI-SIGN,based on the SM2 algorithm.This scheme boasts strong key insulation and secure keyupdates.Our scheme uses the elliptic curve algorithm,which is not only more efficient but also more suitable for IIoT-cloud environments.Finally,the security proof of SM2-KI-SIGN is given under the Elliptic Curve Discrete Logarithm(ECDL)assumption in the random oracle.展开更多
In this paper,a novel contingency-aware method for N-2 security-constrained transmission expansion planning is proposed.To ensure that the transmission construction plan satisfies the N-2 security criterion,the propos...In this paper,a novel contingency-aware method for N-2 security-constrained transmission expansion planning is proposed.To ensure that the transmission construction plan satisfies the N-2 security criterion,the proposed method takes advantage of the adjustable robust optimization(ARO)framework and upgrades it.We construct a discrete uncertainty set in which component failures are treated as uncertain events that are handled as binary variables.In addition to the failure of existing lines and generators,we explicitly model the failure of candidate lines.The proposed model comprises a master problem that makes the transmission construction decision,and a series of subproblems that can detect not only the worst contingency,but also the potential contingencies.Computational studies on the IEEE RTS 24-bus and IEEE 118-bus test systems are carried out to validate the effectiveness of the proposed method.Compared with the deterministic method and ARO method in the literature,the proposed method has higher computational efficiency.展开更多
目的通过观察推拿对坐骨神经慢性压迫性损伤(chronic constriction injury of the sciatic nerve,CCI)模型鼠脊髓背角胶质纤维酸性蛋白(glial fibrillary acidic protein,GFAP)、N-甲基-D-天冬氨酸(N-methyl-D-aspartate,NMDA)受体2B亚...目的通过观察推拿对坐骨神经慢性压迫性损伤(chronic constriction injury of the sciatic nerve,CCI)模型鼠脊髓背角胶质纤维酸性蛋白(glial fibrillary acidic protein,GFAP)、N-甲基-D-天冬氨酸(N-methyl-D-aspartate,NMDA)受体2B亚基(NR2B)表达的影响,探讨推拿治疗神经病理性疼痛的镇痛机制。方法建立CCI模型,将大鼠分为假手术组、模型组、推拿组,每组12只,采用按摩推拿手法模拟仪定性、定量模拟点法、拨法、揉法,对推拿组大鼠右侧的殷门、承山、阳陵泉穴进行干预,通过机械缩足反射阈值和累计疼痛评分评价大鼠机械痛敏反应和疼痛强度变化;通过透射电镜对大鼠脊髓背角突触超微结构进行观察;采用免疫荧光双重标记法观察脊髓背角GFAP、NR2B的共定位表达。结果推拿可以提高CCI模型鼠机械缩足反射阈值、降低累计疼痛评分(P<0.01);同时也能改变大鼠脊髓背角突触的形态结构:与模型组相比,推拿组脊髓背角突触形态结构恢复,膜较完整、线粒体肿胀程度轻、突触后致密区变长。干预20天后,与模型组比较,推拿组大鼠脊髓背角GFAP、NR2B平均荧光强度显著降低(P<0.05)。结论推拿可以改善大鼠的行为学和形态学结果,改变脊髓背角突触可塑性来抑制痛觉敏化;还可以通过抑制星型胶质细胞活化,降低脊髓背角GFAP和NR2B的表达来镇痛。展开更多
基金This work was supported in part by the National Natural Science Foundation of China(Nos.62072074,62076054,62027827,62002047)the Sichuan Science and Technology Innovation Platform and Talent Plan(Nos.2020JDJQ0020,2022JDJQ0039)+2 种基金the Sichuan Science and Technology Support Plan(Nos.2020YFSY0010,2022YFQ0045,2022YFS0220,2023YFG0148,2021YFG0131)the YIBIN Science and Technology Support Plan(No.2021CG003)the Medico-Engineering Cooperation Funds from University of Electronic Science and Technology of China(Nos.ZYGX2021YGLH212,ZYGX2022YGRH012).
文摘With the continuous expansion of the Industrial Internet of Things(IIoT),more andmore organisations are placing large amounts of data in the cloud to reduce overheads.However,the channel between cloud servers and smart equipment is not trustworthy,so the issue of data authenticity needs to be addressed.The SM2 digital signature algorithm can provide an authentication mechanism for data to solve such problems.Unfortunately,it still suffers from the problem of key exposure.In order to address this concern,this study first introduces a key-insulated scheme,SM2-KI-SIGN,based on the SM2 algorithm.This scheme boasts strong key insulation and secure keyupdates.Our scheme uses the elliptic curve algorithm,which is not only more efficient but also more suitable for IIoT-cloud environments.Finally,the security proof of SM2-KI-SIGN is given under the Elliptic Curve Discrete Logarithm(ECDL)assumption in the random oracle.
基金supported by the National Key Research and Development Plan of China(No.2016YFB0900100)National Natural Science Foundation of China(No.51807116).
文摘In this paper,a novel contingency-aware method for N-2 security-constrained transmission expansion planning is proposed.To ensure that the transmission construction plan satisfies the N-2 security criterion,the proposed method takes advantage of the adjustable robust optimization(ARO)framework and upgrades it.We construct a discrete uncertainty set in which component failures are treated as uncertain events that are handled as binary variables.In addition to the failure of existing lines and generators,we explicitly model the failure of candidate lines.The proposed model comprises a master problem that makes the transmission construction decision,and a series of subproblems that can detect not only the worst contingency,but also the potential contingencies.Computational studies on the IEEE RTS 24-bus and IEEE 118-bus test systems are carried out to validate the effectiveness of the proposed method.Compared with the deterministic method and ARO method in the literature,the proposed method has higher computational efficiency.
文摘目的通过观察推拿对坐骨神经慢性压迫性损伤(chronic constriction injury of the sciatic nerve,CCI)模型鼠脊髓背角胶质纤维酸性蛋白(glial fibrillary acidic protein,GFAP)、N-甲基-D-天冬氨酸(N-methyl-D-aspartate,NMDA)受体2B亚基(NR2B)表达的影响,探讨推拿治疗神经病理性疼痛的镇痛机制。方法建立CCI模型,将大鼠分为假手术组、模型组、推拿组,每组12只,采用按摩推拿手法模拟仪定性、定量模拟点法、拨法、揉法,对推拿组大鼠右侧的殷门、承山、阳陵泉穴进行干预,通过机械缩足反射阈值和累计疼痛评分评价大鼠机械痛敏反应和疼痛强度变化;通过透射电镜对大鼠脊髓背角突触超微结构进行观察;采用免疫荧光双重标记法观察脊髓背角GFAP、NR2B的共定位表达。结果推拿可以提高CCI模型鼠机械缩足反射阈值、降低累计疼痛评分(P<0.01);同时也能改变大鼠脊髓背角突触的形态结构:与模型组相比,推拿组脊髓背角突触形态结构恢复,膜较完整、线粒体肿胀程度轻、突触后致密区变长。干预20天后,与模型组比较,推拿组大鼠脊髓背角GFAP、NR2B平均荧光强度显著降低(P<0.05)。结论推拿可以改善大鼠的行为学和形态学结果,改变脊髓背角突触可塑性来抑制痛觉敏化;还可以通过抑制星型胶质细胞活化,降低脊髓背角GFAP和NR2B的表达来镇痛。
