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钻削车用CFRP材料的DLC涂层合金钻头的性能研究

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现代制造工程 2024年第12期 108-113页

作者：汪洋杨兰杰浙江经济职业技术学院杭州310018 浙江吉利新能源商用车集团有限公司杭州310018

汽车碳纤维材料的钻孔加工面临钻头寿命短、加工质量差的问题。DLC涂层具有摩擦系数低、表面硬度高的优点,可以有效地提高切削刀具的使用寿命。通过对无涂层、DLC涂层、Cr/W-DLC/DLC涂层和Cr/CrN/DLC涂层的4组整体硬质合金钻头样品的对... 详细信息

汽车碳纤维材料的钻孔加工面临钻头寿命短、加工质量差的问题。DLC涂层具有摩擦系数低、表面硬度高的优点,可以有效地提高切削刀具的使用寿命。通过对无涂层、DLC涂层、Cr/W-DLC/DLC涂层和Cr/CrN/DLC涂层的4组整体硬质合金钻头样品的对比测量,采集不同涂层的摩擦系数和表面硬度以及表面粗糙度数据,得出所有DLC涂层都有低摩擦系数和可改善表面粗糙度的优点。同时对4组样品进行钻孔性能测试,采集钻削扭力、钻削温度、钻削速度以及钻头刃口的磨损量等数据,发现Cr/CrN/DLC复合涂层能有效地提高加工CFRP钻头的使用寿命,其平均寿命是无涂层钻头的2.65倍,且性能稳定。

关键词： CFRP 硬质合金钻头 DLC复合涂层钻削性能

从民质到民主:严复关于中国近代政治秩序设计的一种可能

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哲学门 2016年第1期17卷 47-63页

作者：杨澜洁中国人民大学哲学院

作为身处新旧中西之变局中的知识分子,严复处于中国传统和儒学价值遭受到空前未有的全盘性怀疑的时代。而欲“变今之俗”的严复,则试图提出一套新的民主政治秩序设计。这体现在他对于从民质到民主的演变逻辑之中。

关键词：立宪民主地方自治

基于DOE的加工汽车碳纤维材料的新型钻头设计与优化

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汽车零部件 2023年第2期 15-20页

作者：汪洋杨兰杰浙江经济职业技术学院浙江杭州310018 浙江吉利新能源商用车集团有限公司浙江杭州310018

针对加工汽车碳纤维材料的钻头寿命短、加工质量差的问题,设计了一种新型钻头。通过DOE(design of experiment)试验方法,给出了钻头齿数、前角和后角等3个参数的全因子试验方案。利用MINITAB软件对试验数据进行回归分析,并利用响应优化... 详细信息

针对加工汽车碳纤维材料的钻头寿命短、加工质量差的问题,设计了一种新型钻头。通过DOE(design of experiment)试验方法,给出了钻头齿数、前角和后角等3个参数的全因子试验方案。利用MINITAB软件对试验数据进行回归分析,并利用响应优化获得最优设计参数。结果表明:齿数和后角对钻孔个数及钻头寿命影响不显著,前角对钻头寿命有显著影响,后角与前角的交互作用对钻头寿命也有显著影响。齿数、前角和后角对第一孔钻孔时间及钻孔速度有显著影响,齿数与后角的交互作用以及前角与后角的交互作用对钻孔速度有显著影响。通过试验测试验证优化后的最佳设计参数是有效合理的。

关键词：碳纤维钻头试验设计回归分析优化响应

纤维改性方法对植物纤维复合材料的高性能化研究进展

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化工新型材料 2021年第12期49卷 67-72页

作者：杨兰杰王宏光吴浩刘正億东北林业大学土木工程学院哈尔滨150040 生物质材料科学与技术教育部重点实验室哈尔滨150040

与合成纤维增强复合材料相比,植物纤维复合材料具有价格低、可再生、可生物降解等优点,但其力学性能相对较低,限制了植物纤维复合材料被广泛应用的范围。综述了近年来国内外通过植物纤维表面预处理方法来改善复合材料机械性能的研究进展... 详细信息

与合成纤维增强复合材料相比,植物纤维复合材料具有价格低、可再生、可生物降解等优点,但其力学性能相对较低,限制了植物纤维复合材料被广泛应用的范围。综述了近年来国内外通过植物纤维表面预处理方法来改善复合材料机械性能的研究进展,重点介绍了物理、化学、生物以及组合法处理等改性方法,进而改善了植物纤维的反应活性、提高其与聚合物基体材料的界面兼容性及复合材料的综合功能作用。并总结了改性天然植物纤维对复合材料性能的影响及研发进展,展望了植物纤维高性能化的绿色发展方向,以期为今后植物纤维增强复合材料的发展提供思路和参考。

关键词：天然植物纤维复合材料改性工艺应用研究

Diacylated anthocyanins from purple sweet potato(Ipomoea batatas L.)attenuate hyperglycemia and hyperuricemia in mice induced by a high-fructose/high-fat diet

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2023年第7期24卷 587-601页

作者： Luhong SHEN yang yang Jiuliang ZHANG lanjie FENG Qing ZHOU College of Food Science and Technology Huazhong Agricultural UniversityWuhan 430070China Department of Pharmacy Wuhan City Central HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430014China

Studies have shown that targeting xanthine oxidase(XO)can be a feasible treatment for fructose-induced hyperuricemia and *** study aimed to evaluate the dual regulatory effects and molecular mechanisms of diacylated anthocyanins from purple sweet potato(diacylated AF-PSPs)on hyperglycemia and hyperuricemia induced by a high-fructose/high-fat *** body weight,organ index,serum biochemical indexes,and liver antioxidant indexes of mice were measured,and the kidneys were observed in pathological *** relative expression levels of messenger RNAs(mRNAs)of fructose metabolism pathway enzymes in kidney were detected by fluorescent real-time quantitative polymerase chain(qPCR)reaction technique,and the expression of renal transporter protein and inflammatory factor pathway protein was determined by immunohistochemistry(IHC)*** showed that diacylated AF-PSPs alleviated hyperuricemia in mice,and that this effect might be related to the regulation of liver XO activity,lipid accumulation,and relevant renal *** AF-PSPs reduced body weight and relieved lipid metabolism disorder,liver lipid accumulation,and liver oxidative stress,thereby enhancing insulin utilization and sensitivity,lowering blood sugar,and reducing hyperglycemia in ***,diacylated AF-PSPs restored mRNA levels related to renal fructose metabolism,and reduced kidney injury and *** study provided experimental evidence for the mechanisms of dual regulation of blood glucose and uric acid(UA)by diacylated AF-PSPs and their utilization as functional foods in the management of metabolic syndrome.

关键词： Diacylated anthocyanins from purple sweet potato(diacylated AF-PSPs) Hyperglycemia Hyperuricemia Metabolism syndrome Regulation of renal function

Developing fibrin-based biomaterials/scaffolds in tissue engineering

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Bioactive Materials 2024年第10期40卷 597-623页

作者： Songjie Li Xin Dan Han Chen Tong Li Bo Liu Yikun Ju yang Li lanjie Lei Xing Fan Department of Plastic and Reconstructive Surgery Xijing HospitalFourth Military Medical UniversityXi’an710032China Department of Plastic and Aesthetic(Burn)Surgery The Second Xiangya HospitalCentral South UniversityChangsh1410011China Key Laboratory of Artificial Organs and Computational Medicine in Zhejiang Province Institute of Translational MedicineZhejiang Shuren UniversityHangzhou310015China

Tissue engineering technology has advanced rapidly in recent years, offering opportunities to construct biologicallyactive tissues or organ substitutes to repair or even enhance the functions of diseased tissues and ***-engineered scaffolds rebuild the extracellular microenvironment by mimicking the extracellular ***-based scaffolds possess numerous advantages, including hemostasis, high biocompatibility, and gooddegradability. Fibrin scaffolds provide an initial matrix that facilitates cell migration, differentiation, proliferation,and adhesion, and also play a critical role in cell-matrix interactions. Fibrin scaffolds are now widelyrecognized as a key component in tissue engineering, where they can facilitate tissue and organ defect *** review introduces the properties of fibrin, including its composition, structure, and biology. In addition, themodification and cross-linking modes of fibrin are discussed, along with various forms commonly used in tissueengineering. We also describe the biofunctionalization of fibrin. This review provides a detailed overview of theuse and applications of fibrin in skin, bone, and nervous tissues, and provides novel insights into future researchdirections for clinical treatment.

关键词： Fibrin Scaffold Tissue engineering Tissue repair

Preference Value-Based Network Selection and Resource Allocation in Heterogeneous Wireless Networks

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Journal of Harbin Institute of Technology(New Series) 2015年第1期22卷 37-42页

作者： Tao Zhang Yi Li lanjie Zhai Jian Liu School of Telecommunication Engineering Beijing University of Posts and Telecommunications

Network selection and resource allocation( NS-RA) are the processes of determining network and radio resource which provide the service to user. Optimizing these processes is an important step towards maximizing the utilization of current and future networks. In this paper,we proposed a preference value-based network selection and resource allocation,in which the NS scheme was performed by the joint radio resource management( JRRM) entity and the RA scheme was performed by the network. In the NS step,the JRRM entity selected the preferable network for users according to the preference value of each network,which took the load balance,the received signal strength( RSS) and the relative position between the user and the network into account. In the second step,the network allocated the optimal sub-carrier to user for the downlink transmission each round according to the preference value of each user and the maximum reachable data rate calculated by users' perceived channel information,maximizing the spectrum efficiency as well as guaranteeing the fairness. The simulation results showed that the proposed NS-RA scheme achieves better performance in terms of load distribution,spectrum efficiency and user fairness,compared to the conventional strategies.

关键词： heterogeneous wireless network preference value ne

On the bramble way to Mg metal anodes in secondary Mg ion batteries

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Journal of Materials Science & Technology 2023年第19期150卷 175-189页

作者： Guodong Zou Jiawen Feng Xue Zhao Jinming Wang yangyang Wang Weihao yang Mengyao Wei Yimin Wang lanjie Li Liqun Ren Carlos Fernandez Qiuming Peng State Key Laboratory of Metastable Materials Science and Technology School of Materials Science and EngineeringYanshan UniversityQinhuangdao 066004China Department of General Surgery First Hospital of QinhuangdaoHebei Medical UniversityQinhuangdao 066000China Chengde Iron and Steel Group Co. Ltd.HBIS Group Co.Ltd.Chengde 067102China Laboratory of Spinal Cord Injury and Rehabilitation Chengde Medical UniversityChengde 067000China School of Pharmacy and Life Sciences Robert Gordon UniversityAberdeen AB107GJUnited Kingdom

As a prospective alternative to lithium-ion batteries,rechargeable magnesium metal batteries(RMBs)have many unparalleled advantages,including direct use of Mg metal as the electrode;large nature abundance;intrinsically safe merits;high theoretical volumetric ***,there exist a large number of challenges on electrodes for their *** them,surface passivation,uneven deposition/dissolution,and corrosion are critical issues that severely hinder the development of Mg anodes in *** review gives a specific comprehensive,and in-depth summary of mechanisms relative to these ***,it displays the protection progresses of the Mg metal anode via three-dimensional host nanostructure fabrication,Mg alloys anode design,current collector modification,artificial solid-electrolyte interphase construction,and electrolyte ***,future perspectives and outlooks in developing the other blossom of these strategies for rechargeable Mg batteries are also *** overview provides significant guidance for designing and fabricating high-performance Mg metal anodes in secondary Mg batteries and boosting their commercial applications.

关键词： Mg metal anode Mg alloys Deposition/dissolution Dendrite Artificial solid-electrolyte interphase Mg ion battery

CALCULATION OF SUPERSONIC STEADY-STATE FLOW IN AXISYMMETRIC NOZZLES WITH AN UPWIND DIFFERENCE SCHEME

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Acta Mechanica Sinica 1985年第1期1卷 9-17页

作者： Huang lanjie (Computing Center,Academia Sinica) 1. Computing Center Academia Sinica China

This paper is on the application of the upwind difference scheme proposed by theauthor to the calculation of supersonic steady-state flow ha axisymmetric *** upwindscheme is conservative(or weakly conservative),it yields results approximating those from the charac-teristic relations,and it has corresPonding boundary difference *** entropy phenomenonin the calculation of shock reflection on boundaries with the shock-capturing method will be discuss-ed and a correction of this phenomenon will be *** numerical experiments on anarbitrary nozzle,it is seen that the upwind difference scheme,its corresponding boundary scheme,andthe improved treatment of shock reflection work well for the calculation of supersonic steady-stateflow in axisymmetric nozzles.

关键词： upwind difference scheme weakly conservative scheme characteristics characteristic relations axisymmetric nozzles shock reflection entropy phenomenon