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Friction 2024年第3期12卷 452-461页

作者： Xiaoyue WANG zenghui yang Tingmei WANG Qihua WANG Xinrui ZHANG Song LI Key Laboratory of Science and Technology on Wear and Protection of Materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Recyclability of thermosetting polymers and their composites is a challenge for alleviating environmental pollution and resource *** this study,solvent-recyclable thermosetting polyimide(PI)and its composite were successfully *** tensile strength,elongation at break,and Young’s modulus of PI are 108.70±7.29 MPa,19.35%±3.89%,and 2336.42±128.00 MPa,*** addition of reduced graphene oxide(RGO)not only enhances the mechanical properties of PI but also endows it with excellent tribological *** PI illustrates a high recycling efficiency of 94.15%,but the recycled composite exhibits inferior mechanical *** recycling and utilization of PI and its composite are realized through imine bonds(-C=N),which provides new guidance for solving the problem of environmental pollution and resource waste and is potential application in the field of sustainable tribology.

关键词： thermosetting polyimide(PI) recyclability dynamic covalent bonds friction and wear polymer composites

An attribute-based access control scheme using blockchain technology for IoT data protection

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High-Confidence Computing

High-Confidence Computing 2024年第3期4卷 41-50页

作者： zenghui yang Xiubo Chen Yunfeng He Luxi Liu Yinmei Che Xiao Wang Ke Xiao Gang Xu Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing 100876China Information Center of China North Industries Group Corporation Beijing 100089China School of Information Science and Technology North China University of TechnologyBeijing 100144China

With the wide application of the Internet of Things(IoT),storing large amounts of IoT data and protecting data privacy has become a meaningful *** general,the access control mechanism is used to prevent illegal users from accessing private ***,traditional data access control schemes face some non-ignorable problems,such as only supporting coarse-grained access control,the risk of centralization,and high trust *** this paper,an attribute-based data access control scheme using blockchain technology is *** address these problems,attribute-based encryption(ABE)has become a promising solution for encrypted data access ***,we utilize blockchain technology to construct a decentralized access control scheme,which can grant data access with transparency and ***,our scheme also guarantees the privacy of policies and attributes on the blockchain ***,we optimize an ABE scheme,which makes the size of system parameters smaller and improves the efficiency of *** optimizations enable our proposed scheme supports large attribute universe requirements in IoT ***,to prohibit attribute impersonation and attribute replay attacks,we design a challenge-response mechanism to verify the ownership of ***,we evaluate the security and performance of the *** comparisons with other related schemes show the advantages of our proposed *** to existing schemes,our scheme has more comprehensive advantages,such as supporting a large universe,full security,expressive policy,and policy hiding.

关键词： Attribute-based encryption Access control Blockchain IoT data protection

自觉、自信、自省:黄河文化赋能旅游业高质量发展的三重维度

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济源职业技术学院学报 2024年第3期23卷 16-20页

作者：杨增晖中共聊城市委党校文史教研室山东聊城252000

黄河是中华民族的母亲河,黄河流域蕴含着展现中华文明发展进程的重要历史文化资源,为旅游产业高质量发展提供了文化支撑。以自觉、自信、自省三个维度探讨黄河文化赋能旅游产业高质量发展:文化自觉是对黄河文化的深刻内涵、核心价值和... 详细信息

黄河是中华民族的母亲河,黄河流域蕴含着展现中华文明发展进程的重要历史文化资源,为旅游产业高质量发展提供了文化支撑。以自觉、自信、自省三个维度探讨黄河文化赋能旅游产业高质量发展:文化自觉是对黄河文化的深刻内涵、核心价值和综合规律的清醒认知,文化自信是黄河流域文化产业和旅游产业融合的内在支撑,文化自省是贯穿黄河流域文旅发展始终的自我辩证力。要系统审视黄河文化在黄河流域旅游业高质量发展中的作用,竭力实现黄河文化发展和旅游产业发展双赢。

关键词：黄河文化旅游产业高质量发展

聚六氢化三嗪交联聚酰亚胺/石墨烯形状记忆复合材料

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功能高分子学报 2024年第2期37卷 113-120页

作者：杨增辉王炎张新瑞王廷梅王齐华中国科学院兰州化学物理研究所兰州730000

以高分散性的氧化石墨烯(GO)作为增强相,通过溶剂挥发、高温环化的方法制备了聚六氢化三嗪交联聚酰亚胺/石墨烯(PI-PHT)形状记忆复合材料。利用核磁、红外光谱、热重分析等对材料的结构和热稳定性进行表征,通过万能试验机对复合材料的... 详细信息

以高分散性的氧化石墨烯(GO)作为增强相,通过溶剂挥发、高温环化的方法制备了聚六氢化三嗪交联聚酰亚胺/石墨烯(PI-PHT)形状记忆复合材料。利用核磁、红外光谱、热重分析等对材料的结构和热稳定性进行表征,通过万能试验机对复合材料的力学性能进行测试,通过动态热机械分析仪对热机械性能、形状记忆性能、形状回复力等进行分析。结果表明:引入石墨烯后,复合材料的强度、韧性、热机械性能以及形状记忆性能明显提升,其中当GO的质量分数为5%时,复合材料的拉伸强度和韧性分别达到105.7 MPa和12.4 MJ/m~3(相比未添加GO的PI-PHT分别提高了1.3倍和2倍),并且其形状固定率、回复率和回复应力分别达到了97.2%、92.6%和9.46 MPa。

关键词：聚酰亚胺形状记忆石墨烯聚六氢化三嗪力学性能

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Multi-scale detector optimized for small target

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Optoelectronics Letters 2024年第4期20卷 243-248页

作者： ZHU Yongchang yang Sen TONG Jigang WANG zenghui School of Electrical Engineering and Automation Tianjin University of TechnologyTianjin 300384China Center of Artificial Intelligence and Data Science University of South AfricaFlorida 1709South Africa Department of Electrical Engineering University of South AfricaFlorida 1709South Africa

The effectiveness of deep learning networks in detecting small objects is limited,thereby posing challenges in addressing practical object detection *** this research,we propose a small object detection model that operates at multiple *** model incorporates a multi-level bidirectional pyramid structure,which integrates deep and shallow networks to simultaneously preserve intricate local details and augment global ***,a dedicated multi-scale detection head is integrated into the model,specifically designed to capture crucial information pertaining to small *** comprehensive experimentation,we have achieved promising results,wherein our proposed model exhibits a mean average precision(mAP)that surpasses that of the well-established you only look once version 7(YOLOv7)model by 1.1%.These findings validate the improved performance of our model in both conventional and small object detection scenarios.

关键词： networks details thereby

结直肠癌中circMFSD12对肿瘤细胞功能及5-FU敏感性的调控

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中华结直肠疾病电子杂志 2024年第4期13卷 294-302页

作者：崔精鲍一帆沈晓明杨增辉高森鲍传庆江南大学/无锡医学院精准基因组医学实验室 214122 江南大学附属医院内分泌科无锡214122 江南大学附属医院胃肠外科无锡214122

目的本研究通过分析circMFSD12在结直肠癌中的表达及对肿瘤细胞增殖、迁移、侵袭,以及对5-氟尿嘧啶(5-FU)敏感性的影响,从而分析其作为潜在治疗靶点的可行性,以期为结直肠癌治疗提供新思路.方法检索公开数据库中有关结直肠癌组织、正常... 详细信息

目的本研究通过分析circMFSD12在结直肠癌中的表达及对肿瘤细胞增殖、迁移、侵袭,以及对5-氟尿嘧啶(5-FU)敏感性的影响,从而分析其作为潜在治疗靶点的可行性,以期为结直肠癌治疗提供新思路.方法检索公开数据库中有关结直肠癌组织、正常结肠组织和正常肠组织的人源RNA数据集(GSE172229,GSE166973,GSE147597),并筛选在结直肠癌中表达下调的circRNA,从而通过实时定量PCR(qRT-PCR)分析circMFSD12在结直肠癌细胞株中的表达水平.基于构建过表达circMFSD12的质粒并转染结直肠癌细胞株LoVo和SW620,通过EdU染色、划痕实验和Transwell实验评估其对细胞增殖、迁移和侵袭的影响.同时,通过CCK8实验和流式细胞术实验检测其对5-FU敏感性的影响,从而进一步通过生物信息学分析和miRNA pull down实验研究其潜在的分子机制.结果circMFSD12在结直肠癌组织(筛选标准:logFC<-0.5)和细胞(circMFSD12表达量在人正常结肠上皮细胞NCM460为1.00±0.14,在结直肠癌细胞中分别为HCT116:0.72±0.08、LoVo:0.42±0.10、SW480:0.72±0.04和SW620:0.48±0.07)中均表达下调(P<0.05).体外实验结果显示,过表达circMFSD12显著抑制结直肠癌细胞的增殖(LoVo:52%±5.3%vs.22%±3.7%,P<0.001;SW620:56%±10%vs.26%±4.0%,P<0.001)、迁移(LoVo:75%±5.5%vs.34%±5.7%,P<0.001;SW620:54%±7.5%vs.22%±5.6%,P<0.001)和侵袭(LoVo:104±18.6vs.41.7±10.2,P<0.01;SW620:86.7±16.5 vs.34.7±4.9,P<0.01),并增强了细胞(LoVo:Control:2.5±0.7 vs.7.4±1.0,P<0.01,5-FU:11.8±1.9 vs.28.6±1.9,P<0.001;SW620:Control:2.2±0.4 vs.8.1±1.3,P<0.01,5-FU:10.2±1.4 vs.23.4±2.3,P<0.001)对5-FU的敏感性.生物信息学分析及实验验证表明,通过调节靶向miR-887-3p和PPP1R12B表达,circMFSD12对结直肠癌细胞的生物行为有抑制作用.结论circMFSD12调控miR-887-3p/PPP1R12B,从而显著影响结直肠癌细胞的生物行为,表明其作为新型分子标志物和潜在治疗靶点有良好的研究前景.

关键词：结直肠肿瘤 circMFSD12 靶点治疗 5-氟尿嘧啶增殖迁移侵袭

A double-layer radiative cooling coating that utilizes the refractive index difference between layers to achieve extremely high solar reflectivity

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Science China Technological Sciences 2024年第10期67卷 3182-3189页

作者： WANG FuQiang LI ChunZhe yang ZhenNing XIE WeiXin LI Xiang XU zenghui YAN YuYing CHENG ZiMing School of Energy Science and Engineering Harbin Institute of Technology School of New Energy Harbin Institute of Technology at Weihai China Construction Eco-Environmental Protection Technology Co. Ltd. Faculty of Engineering University of Nottingham

Passive daytime radiative cooling（PDRC） technology has great potential in reducing cooling energy consumption. In order to further improve the spectral performance of PDRC coatings, current researchers mostly focus on the selection and size design of functional particles, while ignoring the optical properties enhancement effect caused by the interlayer binder. In this study, based on the principle that the refractive index difference between layers enhanced the backscattering performance of the solar spectrum, we proposed and manufactured a double-layer PDRC coating with polyvinylidene difluoride（PVDF） as the filmforming material in the upper layer and polydimethylsiloxane（PDMS） as the film-forming material in the lower layer, both filled with Al2O3and SiO2particles. The double-layer PDRC coating exhibited excellent spectral performance that a high solar reflectivity of 98% and an emissivity of 0.95 at the “atmospheric window” band. In comparison, the solar spectrum reflectivity of the single-layer PDRC coatings based on PVDF and PDMS of the same thickness was 95% and 94.7%, respectively. Outdoor tests showed that the PDRC coating achieved a temperature decrease of up to 7.1℃ under direct sunlight at noon time. In addition, the PDRC coating had excellent weather resistance, water resistance, and other basic properties. This article opens up a new idea and provides methodological guidance for the design of double-layer PDRC coatings.

关键词： double-layer radiative cooling coating spectral modulation interlayer refractive index solar energy radiative transfer

Transcriptional regulation of MdPIN7 by MdARF19 during gravityinduced formation of adventitious root GSA in self-rooted apple stock

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Horticultural Plant Journal 2024年第5期10卷 1073-1084页

作者： zenghui Wang Xuemei yang Linyue Hu Wei Liu Lijuan Feng Xiang Shen Yanlei Yin Jialin Li Shandong Institute of Pomology Tai'anShandong 271000China School of Biological Science and Technology University of JinanJinanShandong 250022China State Key Laboratory of Crop Biology Key Laboratory of Biology and Genetic Improvement of Horticultural Crops(Huanghuai Region)Ministry of AgricultureCollege of Horticulture Science and EngineeringShandong Agricultural UniversityTai'anShandong 271018China

Self-rooted apple stock is widely used for apple ***,the shallowness of the adventitious roots in self-rooted apple stock leads to poor performance in the barren orchards of *** is because of the considerable difference in the development of a gravitropic set-point angle(GSA)between self-rooted apple stock and seedling ***,it is crucial to study the molecular mechanism of adventitious root GSA in self-rooted apple stock for breeding self-rooted and deep-rooted apple rootstock *** apple auxin response factor MdARF19 functioned to establish the adventitious root GSA of self-rooted apple stock in response to gravity and auxin ***19 bound directly to the MdPIN7 promoter,activating its transcriptional expression and thus regulating the formation of the adventitious root GSA in 12-2 self-rooted apple ***,MdARF19 influenced the expression of auxin efflux carriers(MdPIN3 and MdPIN10)and the establishment of adventitious root GSA of self-rooted apple stock in response to gravity signals by direct activation of *** findings provide new information on the transcriptional regulation of MdPIN7 by auxin response factor MdARF19 in the regulation of the adventitious root GSA of self-rooted apple stock in response to gravity and auxin signals.

关键词： Apple Self-rooted stock Gravity MdARF19 MdPIN7 Gravitropic set-point angle Transcriptional regulation

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永磁电机在门座式起重机上的研究与开发

现代食品 2024年第16期30卷 23-25页

作者：刘明辉杨增辉卢全伟法磊张灿季建华刘胤隋阳李作志青岛港国际股份有限公司董家口分公司山东青岛266000

门座式起重机在港口大型机械中扮演着重要的角色,而其中的电机又是门机中的重中之重,它直接影响了起重机的工作效率和大型机械的节能效率。传统电机作为门机旋转和行走的驱动电机,在贯彻节能减排的现代化生产上展现的作用并不明显,传统... 详细信息

门座式起重机在港口大型机械中扮演着重要的角色,而其中的电机又是门机中的重中之重,它直接影响了起重机的工作效率和大型机械的节能效率。传统电机作为门机旋转和行走的驱动电机,在贯彻节能减排的现代化生产上展现的作用并不明显,传统电机变频调速极限范围太小,容易出现高功率配低负载的情况。为了避免此类情况发生,研究使用永磁电机作为门机旋转和行走的驱动电机,使用后节能减排效果突出,具有很大的推广应用价值。

关键词：永磁电机旋转节能

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LOW PROFILE MEANDER LINE PRINTED QUADRIFILAR HELIX ANTENNA

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Journal of Electronics(China) 2011年第1期28卷 53-57页

作者： yang zenghui Cao Qunshen Chen Zhenhua Avicopter Co. Ltd Jia5-19 Shuguangxili Chaoyang District Beijing 100028 China College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Department of Information Science and Technology Southeast University Nanjing 211189 China

In this paper,a new approach of meander line technique for Printed Quadrifilar Helix Antenna(PQHA) is *** with other meander line techniques,this approach has lowered the axial height of antenna greatly and improved the efficiency of model-building in simulation *** have focused on the analysis of radiation pattern,axial ratio,and design graph for the Meander line Printed Quadrifilar Helix Antenna(MPQHA).Finally,we have reduced successfully 67% size in geometry compared with traditional PQHA method,and obtained rather reasonable results.

关键词： Antenna Meander line Size reduction Quadrifilar Helix Antenna(QHA)