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Graphene-like two-dimensional nanosheets-based anticorrosive coatings: A review

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Journal of Materials Science & Technology 2022年第34期129卷 139-162页

作者： Yumin Zhang Jiulong Sun xinzhe xiao Ning Wang Guozhe Meng Lin Gu School of Chemical Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Shenzhen Institute of Advanced Electronic Materials Shenzhen 518100China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

In recent years, graphene has been widely employed in the field of metal corrosion protection owing to its outstanding impermeability and chemical stability, with examples of such metal protection including pure graphene coatings and graphene-based composite coatings. But the conductive graphene could promote the electrochemical reaction at the interface and accelerate the corrosion of metal substrates. More emerging graphene-like 2D nanosheets are attracting research attention for the application of metal anticorrosion, because of their barrier properties and poor conductivity, mainly including boron nitride(BN),molybdenum disulfide(MoS_(2)), zirconium phosphate(ZrP), and titanium carbide(MXene). In this review,the application of these graphene-like 2D nanosheets to metal protection is comprehensively reviewed.First, the general preparation methods of 2D nanosheets are briefly introduced. Second, surface functionalization of 2D nanosheets, including covalent and non-covalent modification, is described in detail.Third, the anticorrosion performance and optimization measures of pure 2D nanosheets coatings are summarized. Next, the protection performance, anticorrosive mechanism, and optimizations of 2D nanosheets composite coatings are presented. Finally, the future development of 2D nanosheets-based anticorrosive coatings has been prospected, and the challenges in the industrial application are discussed.

关键词： Two-dimensional nanomaterials Surface functionalization Polymer composite coatings Metal Corrosion protection

Deep learning-based channel estimation for wireless ultraviolet MIMO communication systems

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Optoelectronics Letters 2024年第1期20卷 35-41页

作者： ZHAO Taifei SUN Yuxin Lü xinzhe ZHANG Shuang Faculty of Automation and Information Engineering Xi'an University of TechnologyXi'an 710048China Xian Key Laboratory of Wireless Optical Communication and Network Research Xi'an 710048China

To solve the problems of pulse broadening and channel fading caused by atmospheric scattering and turbulence,multiple-input multiple-output(MIMO)technology is a valid way.A wireless ultraviolet(UV)MIMO channel estimation approach based on deep learning is provided in this paper.The deep learning is used to convert the channel estimation into the image processing.By combining convolutional neural network(CNN)and attention mechanism(AM),the learning model is designed to extract the depth features of channel state information(CSI).The simulation results show that the approach proposed in this paper can perform channel estimation effectively for UV MIMO communication and can better suppress the fading caused by scattering and turbulence in the MIMO scattering channel.

关键词： channel scattering MIMO

Cardiac regeneration: Pre-existing cardiomyocyte as the hub of novel signaling pathway

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Genes & Diseases 2024年第2期11卷 747-759页

作者： Tao Wang xinzhe Chen Kai Wang Jie Ju Xue Yu Wanpeng Yu Cuiyun Liu Yin Wang Institute for Translational Medicine The Affiliated Hospital of Qingdao UniversityCollege of MedicineQingdao UniversityQingdaoShandong 266023China College of Medicine Qingdao UniversityQingdaoShandong 266023China

In the mammalian heart,cardiomyocytes are forced to withdraw from the cell cycle shortly after birth,limiting the ability of the heart to regenerate and repair.The development of multimodal regulation of cardiac proliferation has verified that pre-existing cardiomyocyte proliferation is an essential driver of cardiac renewal.With the continuous development of genetic lineage tracking technology,it has been revealed that cell cycle activity produces polyploid cardiomyocytes during the embryonic,juvenile,and adult stages of cardiogenesis,but newly formed mononucleated diploid cardiomyocytes also elevated sporadically during myocardial infarction.It implied that adult cardiomyocytes have a weak regenerative capacity under the condition of ischemia injury,which offers hope for the clinical treatment of myocardial infarction.However,the regeneration frequency and source of cardiomyocytes are still low,and the mechanism of regulating cardiomyocyte proliferation remains further explained.It is noteworthy to explore what force triggers endogenous cardiomyocyte proliferation and heart regeneration.Here,we focused on summarizing the recent research progress of emerging endogenous key modulators and crosstalk with other signaling pathways and furnished valuable insights into the internal mechanism of heart regeneration.In addition,myocardial transcription factors,non-coding RNAs,cyclins,and cell cycle-dependent kinases are involved in the multimodal regulation of pre-existing cardiomyocyte proliferation.Ultimately,awakening the myocardial proliferation endogenous modulator and regeneration pathways may be the final battlefield for the regenerative therapy of cardiovascular diseases.

关键词： Cardiac regeneration Cell cycle re-enter Myocardial infarction Pre-existing cardiomyocyte proliferation Regenerative therapy of cardiovascular diseases

Toughened (Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))B_(2)–SiC composites fabricated by one-step reactive sintering with a unique SiB_(6) additive

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Journal of Advanced Ceramics 2024年第1期13卷 86-100页

作者： Wei Hao xinzhe Lu Ling Li Tao Wang Guoliang Ren Huangyue Cai xiaofeng Zhao Dongyun Wang Na Ni Zhejiang Provincial Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology&Equipment Zhejiang Normal UniversityZhejiang 321004China Key Lab of Education Ministry for Power Machinery and Engineering School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China

High-entropy diboride has been arousing considerable interest in recent years.However,the low toughness and damage tolerance limit its applications as ultra-high-temperature structural materials.Here we report that a unique SiB_(6) additive has been first incorporated as boron and silicon sources to fabricate a high-entropy boride(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))B_(2)–SiC composite though one-step boro/carbothermal reduction reactive sintering.A synergetic effect of high-entropy sluggish diffusion and SiC secondary phase retarded the grain growth of the(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))B_(2)–51SiC composites.The small grain size was beneficial to shorten the diffusion path for mass transport,thereby enhancing the relative density to~99.3%.These results in an increase of fracture toughness from~5.2 in HEBS-1900 to~7.7 MPa·m^(1/2) in HEBS-2000,which corresponded to a large improvement of 48%.The improvement was attributed to a mixed mode of intergranular and transgranular cracking for offering effective pinning in crack propagation,resulting from balanced grain boundary strength collectively affected by improved densification,solid solution strengthening,and incorporation of SiC secondary phase.

关键词： high-entropy diboride silicon hexaboride boro/carbothermal reduction reactive sintering fracture toughness

绝缘二维纳米材料的制备及其改性有机涂层防腐性能的研究进展

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涂料工业 2024年第5期54卷 76-83页

作者：肖敏迪肖欣哲顾林中山大学化学工程与技术学院广东珠海519082

为有效延缓或防止金属腐蚀,向有机涂层中添加具有阻隔效应且疏水的二维纳米材料是当今有效提高涂层防腐性能的策略之一。重点介绍了二维纳米材料(氮化硼和云母纳米片)的剥离方法,二维纳米材料高疏水性、分散性的改性方法,以及详细地讨... 详细信息

为有效延缓或防止金属腐蚀,向有机涂层中添加具有阻隔效应且疏水的二维纳米材料是当今有效提高涂层防腐性能的策略之一。重点介绍了二维纳米材料(氮化硼和云母纳米片)的剥离方法,二维纳米材料高疏水性、分散性的改性方法,以及详细地讨论了二维纳米材料在有机涂层中的防腐性能。最后对氮化硼、云母等绝缘纳米片基防腐涂料的未来发展进行了展望,并提出了工业应用中面临的挑战。

关键词：二维纳米材料改性分散性防腐疏水

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低碳矿区综合能源系统经济运行优化研究

电力系统保护与控制 2024年第6期52卷 177-187页

作者：贠保记赵文王建学贠鑫哲西安科技大学陕西西安710054 西安西瑞控制技术股份有限公司陕西西安710077 西安交通大学电气工程学院陕西西安710049

针对煤矿开采过程中碳排放量高以及乏风、瓦斯、矿井涌水等伴生能源得不到及时有效利用的问题,提出一种低碳经济运行的矿区综合能源系统(coal mine integrated energy system, CMIES)。首先,为使矿区伴生能源得到充分利用,搭建了一个包... 详细信息

针对煤矿开采过程中碳排放量高以及乏风、瓦斯、矿井涌水等伴生能源得不到及时有效利用的问题,提出一种低碳经济运行的矿区综合能源系统(coal mine integrated energy system, CMIES)。首先,为使矿区伴生能源得到充分利用,搭建了一个包含燃气轮机、乏风氧化发电单元、水源热泵等设备的CMIES模型。其次,为降低矿区碳排放量,在CMIES中加入光伏、风电、电转气与氢燃料电池等设备。同时,引入阶梯式碳交易机制与绿色证书交易机制(green certificate trading, GCT),通过“双机制”模型来约束系统碳排放、激励新能源设备出力。最后,调用CPLEX商业求解器,以购能成本、新能源设备运行成本、碳排放成本最小为目标函数进行求解。结果表明:优化后的CMIES碳排放量显著降低,运行成本大幅减少。

关键词：矿区综合能源系统伴生能源低碳经济阶梯式碳交易绿证交易机制

村域尺度的城郊乡村多功能演化与发展路径——以徐州市铜山区为例

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地理科学进展 2024年第3期43卷 446-457页

作者：甄雨马晓冬孙昕哲江苏师范大学地理测绘与城乡规划学院江苏徐州221116 江苏师范大学特色镇村建设与土地管理研究基地江苏徐州221116

城郊地域是乡村多功能发展典型区域,文章选取典型的城郊乡村地域——徐州市铜山区的319个行政村为研究对象,构建乡村地域多功能评价指标体系,揭示2009—2019年研究区乡村经济发展、农业生产、生态保育和生活保障等4类功能的时空演化特征... 详细信息

城郊地域是乡村多功能发展典型区域,文章选取典型的城郊乡村地域——徐州市铜山区的319个行政村为研究对象,构建乡村地域多功能评价指标体系,揭示2009—2019年研究区乡村经济发展、农业生产、生态保育和生活保障等4类功能的时空演化特征,利用Spearman相关系数分析功能间交互变化,总结功能演化类型,探究城郊乡村发展路径,以期为推进城乡融合发展提供科学依据。结果表明:(1)从村域层面看,城郊乡村地域多功能演化的数量结构分异性与空间格局的集聚性并存;(2)根据乡村地域功能间的相关性与交互性演化过程,功能间交互演化的总体关系与局部关系存在一致性,也存在一定差异性,可将其归纳为5种功能演化类型;(3)乡村地域功能演化的路径具有动态性和复杂性特征,可划分为功能融合发展、主导功能引领发展、双功能协调推进发展和多功能综合发展等4种路径。

关键词：城郊乡村多功能演化交互类型调控路径徐州市铜山区

基于注意力机制和提示学习联合训练的上下位关系识别研究

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计算机科学 2024年第S1期51卷 199-203页

作者：白宇王新哲沈阳航空航天大学人机智能研究中心沈阳110136

专利术语间的上下位关系是一种重要的语义关系,专利文本中术语间的上下位关系识别在专利检索、查询扩展、知识图谱构建等多个领域发挥着重要作用。然而,专利文本领域的多样性、语言表述的复杂性使得术语间的上下位关系识别仍然面临许多... 详细信息

专利术语间的上下位关系是一种重要的语义关系,专利文本中术语间的上下位关系识别在专利检索、查询扩展、知识图谱构建等多个领域发挥着重要作用。然而,专利文本领域的多样性、语言表述的复杂性使得术语间的上下位关系识别仍然面临许多挑战。文中提出一种融合提示学习和注意力机制的术语上下位关系识别方法,该方法基于远程监督框架,将术语之间的最短依存路径作为辅助特征融入提示模板,使用图神经网络将术语间的共现信息融入提示学习和注意力机制联合训练过程。在专利文本测试数据集上的实验结果表明,所提方法的AUC值、F1值达到94.94%和89.33%,相较于PARE模型分别提升了3.82%和3.17%。该方法有效地去除了使用远程监督方法标注的数据集的噪声,避免了掩码语言模型的训练目标和下游任务的不匹配问题,充分利用了预训练语言模型中存在的语言知识信息。

关键词：术语关系识别远程监督提示学习注意力机制上下位关系

In sights into the antineoplastic mechanism of Chelidonium majus via systems pharmacology approach

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Frontiers of Electrical and Electronic Engineering in China 2019年第1期7卷 42-53页

作者： xinzhe xiao Zehui Chen Zengrui Wu Tianduanyi Wang Weihua Li Guixia Liu Bo Zhang Yun Tang Shan ghai Key Laboratory of New Drug Desig n School of PharmacyEast China Un iversity of Science and Tech no logyShanghai 200237China Key Laboratory of Xinjiang Phytomedicine Resource and Utilization Ministry of EducationShihezi UniversityShihezi 832002China

Background: The antineoplastic activity of Chelidonium majus has been reported, but its mechanism of action (MoA) is unsuspected. The emerging theory of systems pharmacology may be a useful approach to analyze the complicated MoA of this multi-ingredient traditional Chinese medicine (TCM). Methods: We collected the ingredients and related compound-target interactions of C. majus from several databases. The bSDTNBI (balanced substructure-drug-target network-based inference) method was applied to predict each ingredienfs targets. Pathway enrichment analysis was subsequently conducted to illustrate the potential MoA, and prognostic genes were identified to predict the certain types of cancers that C. majus might be beneficial in treatment. Bioassays and literature survey were used to validate the in silico results? Results: Systems pharmacology analysis demonstrated that C. majus exerted experimental or putative interactions with 18 cancer-associated pathways, and might specifically act on 13 types of cancers. Chelidonine, sanguinarine, chelerythrine, berberine, and coptisine, which are the predominant components of C. majus, may suppress the cancer genes by regulating cell cycle, inducing cell apoptosis and inhibiting proliferation. Conclusions: The antineoplastic MoA of C. majus was investigated by systems pharmacology approach. C. majus exhibited promising pharmacological effect against cancer, and may consequently be useful material in further drug development. The alkaloids are the key components in C. majus that exhibit anticancer activity.

关键词： systems phannacology mechanism of action traditional Chinese medicine Chelidonium majus